JP2020124720A - Tongue for gripping object, and manufacturing method and manufacturing device therefor - Google Patents
Tongue for gripping object, and manufacturing method and manufacturing device therefor Download PDFInfo
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- JP2020124720A JP2020124720A JP2019017897A JP2019017897A JP2020124720A JP 2020124720 A JP2020124720 A JP 2020124720A JP 2019017897 A JP2019017897 A JP 2019017897A JP 2019017897 A JP2019017897 A JP 2019017897A JP 2020124720 A JP2020124720 A JP 2020124720A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 87
- 238000000465 moulding Methods 0.000 claims abstract description 34
- 238000005452 bending Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 11
- 238000007493 shaping process Methods 0.000 claims description 3
- 210000002105 tongue Anatomy 0.000 description 47
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000047 product Substances 0.000 description 16
- 238000007796 conventional method Methods 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000012467 final product Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 235000021168 barbecue Nutrition 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Table Equipment (AREA)
- Food-Manufacturing Devices (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
本発明は、清掃用トング（ゴミ拾い用トングとも呼ぶ。）やバーベキュー用トングなどの物体挟持用トングの製造方法及び製造装置に関する。 The present invention relates to a manufacturing method and a manufacturing apparatus of an object holding tongue such as a cleaning tongue (also referred to as a garbage picking tongue) and a barbecue tongue.
（物体挟持用トング）
道路、公園、浜辺などで定期的に行われる集団清掃では、ゴミを拾う際に、特許文献１又は非特許文献１に示すような清掃用トング（ゴミバサミ）が頻繁に使用されている。また、バーベキューなどの機会においても、炭や肉などを取り扱うために、特許文献２又は非特許文献２に示すようなバーベキュー用トングがよく使用されている。これらの物体挟持用トングは、通常、一枚の細い金属薄板をＵ字状に形成し、一対の先端で、ゴミなどの物体を把持するものである。
(Tongs for holding objects)
In group cleaning regularly performed on roads, parks, beaches, etc., when picking up dust, a cleaning tongue (trash scissors) as shown in Patent Document 1 or Non-Patent Document 1 is frequently used. In addition, barbecue tongs as shown in Patent Document 2 or Non-Patent Document 2 are often used to handle charcoal, meat, and the like even at occasions such as barbecues. These object-holding tongs are usually formed by forming a thin metal thin plate into a U-shape, and gripping an object such as dust with a pair of tips.
（使用時の問題点）
しかしながら、従来のトングは、長手方向のどの位置でも薄く扁平な断面を有するため、機械的な剛性が低く、重い物体や大きな物体を先端で把持しようとする際に、先端及び該先端に近接した部分が本来の形状を保てずに変形してしまい（ねじれたり、歪んだりしてしまい）、物体を上手く掴めないといった不具合が報告されている。
(Problems when using)
However, since the conventional tongs have a thin and flat cross section at any position in the longitudinal direction, they have low mechanical rigidity, and when trying to grip a heavy object or a large object with the tip, the tongue comes close to the tip and the tip. It has been reported that the part is deformed without being able to maintain its original shape (twisted or distorted) and the object cannot be grasped well.
（製造上の問題点）
また、物体挟持用トングを提供する際には、ユーザーの用途や要望に合わせて、長さやサイズが異なるものを用意する必要がある。しかしながら、従来のトングの製造方法では、後述するように、サイズ毎にこの形状・寸法に合致した金型を用意する必要があり、共用することができない。つまり、従来の方法では、サイズ違いの製品が増える程、金型製作費用の増加、金型保管場所の増大、取替等の作業時間の増加などの製造上の課題も内在している。
(Problems in manufacturing)
Moreover, when providing the tongs for pinching the object, it is necessary to prepare the tongs having different lengths and sizes according to the use and demand of the user. However, in the conventional tongue manufacturing method, as will be described later, it is necessary to prepare a mold that matches the shape and size for each size, and it cannot be shared. That is, in the conventional method, as the number of products of different sizes increases, there are inherent manufacturing problems such as an increase in die manufacturing cost, an increase in die storage space, and an increase in work time such as replacement.
（本発明の目的）
本発明は、このような事情に鑑みてなされたものであり、軽量で剛性が高く、物体を把持した際に先端部分付近がねじれにくい物体把持用トング並びにその製造方法及び製造装置を提供することを目的とする。
(Purpose of the present invention)
The present invention has been made in view of the above circumstances, and provides an object gripping tongue that is lightweight and has high rigidity, and the vicinity of the tip portion thereof is not easily twisted when gripping an object, and a manufacturing method and manufacturing apparatus thereof. With the goal.
また、本発明の別の目的は、サイズ違いトングを製造する場合でも金型を共有可能で、高い剛性（特に曲げに対する剛性）を有する物体把持用トングを安価に製造する方法及び装置を提供することである。 Another object of the present invention is to provide a method and an apparatus for inexpensively manufacturing an object gripping tongue having a high rigidity (in particular, rigidity against bending) that can share a mold even when manufacturing different-sized tongs. That is.
本発明者は、鋭意検討の末、従来の方法で使用されていた長尺薄板体（フラットバー）に代えて、長尺中空円筒体（パイプ体）を原材料として使用して、このパイプ体から物体挟持トングを製造するという斬新な発案に想到し、これに適した製造工程を具現化した。つまり、この方法であれば上記課題を見事に解決できることを見出し、本発明を完成した。 The present inventor, after diligent studies, replaced the long thin plate body (flat bar) used in the conventional method with a long hollow cylindrical body (pipe body) as a raw material, and We came up with the novel idea of manufacturing an object-holding tongue, and realized a manufacturing process suitable for this. That is, the present invention was completed by finding that this method can solve the above problems brilliantly.
すなわち本発明は、例えば、以下の構成・特徴を備えるものである。
（態様１）
長尺パイプ体を用意する材料用意工程と、
前記パイプ体の中央部を扁平化する潰し成形を施す中央部潰し工程と、
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ工程と、
前記パイプ体の一方の先端部を扁平化する潰し成形を施す第１端潰し工程と、
前記パイプ体の他方の先端部を扁平化する潰し成形を施す第２端潰し工程と、
を含むこと
を特徴とする物体挟持用トングの製造方法。
（態様２）
前記中央部潰し工程は、前記中央部に近接した前記パイプ体の基端部も押圧変形してグリップ部を付与すること
を特徴とする態様１に記載の物体挟持用トングの製造方法。
（態様３）
前記一方の先端部に対しバリ取り又は／及び波形状を付与する第１先端部調節工程と、
前記他方の先端部に対しバリ取り又は／及び波形状を付与する第２先端部調節工程と、
をさらに含むこと
を特徴とする態様１又は２に記載の物体挟持用トングの製造方法。
（態様４）
前記一方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与する第１Ｒ形状付与工程と、
前記他方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与する第２Ｒ形状付与工程と、
をさらに含むこと
を特徴とする態様１〜３のいずれかに記載の物体挟持用トングの製造方法。
（態様５）
前記材料用意工程で、アルミニウム製又はチタン製の長尺パイプ体を用意すること
を特徴とする態様１〜４のいずれかに記載の物体挟持用トングの製造方法。
（態様６）
長尺パイプ体の中央部を扁平化する潰し成形を施す中央部潰し手段と、
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ手段と、
前記パイプ体の一方又は他方の先端部を扁平化する潰し成形を施す先端部潰し手段と、
を備えること
を特徴とする物体挟持用トングの製造装置。
（態様７）
前記先端部潰し手段は、前記一方の先端部と、前記他方の先端部と、を水平に保持する水平度保持手段と、をさらに備えること
を特徴とする態様６に記載の物体挟持用トングの製造装置。
（態様８）
前記一方又は他方の先端部に対しバリ取り又は／及び波形状を付与する先端部調節手段をさらに備えること
を特徴とする態様６又は７に記載の物体挟持用トングの製造装置。
（態様９）
前記一方又は他方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与するＲ形状付与手段をさらに備えること
を特徴とする態様６〜８のいずれかに記載の物体挟持用トングの製造装置。
（態様１０）
一対の先端部と、Ｕ字部と、前記先端部と前記Ｕ字部とを連結する胴体と、を備え、
かつ、
前記先端部と前記胴体と前記Ｕ字部とは全て一本の連続した長尺パイプ体から構成され、
前記先端部と前記Ｕ字部とは扁平に潰れた形状を成し、
前記長尺パイプ体の材質は、アルミニウム又はチタンであること
を特徴とする物体挟持用トング。
That is, the present invention has the following configurations and features, for example.
(Aspect 1)
A material preparation process for preparing a long pipe body,
A central portion crushing step of subjecting the central portion of the pipe body to flattening,
A U-shaped bending step of bending the pipe body in a U-shape with the central portion as a base point;
A first end crushing step of performing crush molding for flattening one end of the pipe body;
A second end crushing step of performing crush molding for flattening the other end of the pipe body;
A method of manufacturing a tongs for holding an object, comprising:
(Aspect 2)
The method for manufacturing an object-holding tongue according to Aspect 1, wherein in the central portion crushing step, the base end portion of the pipe body near the central portion is also deformed by pressing to provide a grip portion.
(Aspect 3)
A first tip adjusting step of deburring or/and imparting a wavy shape to the one tip;
A second tip adjusting step of deburring or/and imparting a wavy shape to the other tip;
The method for manufacturing an object-holding tongue according to Aspect 1 or 2, further comprising:
(Aspect 4)
A first R shape imparting step of imparting an inner R shape to the far end portion of the pipe body that is close to the one tip portion;
A second R shape imparting step of imparting an inner R shape to the far end portion of the pipe body which is close to the other tip portion;
The method for manufacturing an object-holding tongue according to any one of aspects 1 to 3, further comprising:
(Aspect 5)
In the material preparing step, a long pipe body made of aluminum or titanium is prepared, and the method for manufacturing the tongs for holding an object according to any one of aspects 1 to 4, characterized in that.
(Aspect 6)
A central portion crushing means for subjecting the central portion of the long pipe body to flattening,
U-shaped bending means for bending the pipe body in a U-shape with the central portion as a base point,
A tip crushing means for crushing and shaping one or the other tip of the pipe body;
An apparatus for manufacturing a tongs for holding an object, comprising:
(Aspect 7)
7. The tongs for holding an object according to aspect 6, wherein the tip end crushing means further includes levelness holding means for horizontally holding the one tip end portion and the other tip end portion. manufacturing device.
(Aspect 8)
8. The apparatus for manufacturing an object-holding tongue according to aspect 6 or 7, further comprising a tip portion adjusting means for deburring or/and providing a wavy shape to the one or the other tip portion.
(Aspect 9)
The object-holding tongue according to any one of aspects 6 to 8, further comprising an R-shape imparting means for imparting an inner R-shape to the far end of the pipe body that is adjacent to the one or the other tip. Manufacturing equipment.
(Aspect 10)
A pair of tip portions, a U-shaped portion, and a body connecting the tip portion and the U-shaped portion,
And,
The tip portion, the body, and the U-shaped portion are all composed of one continuous long pipe body,
The tip portion and the U-shaped portion have a flattened shape,
The material for the long pipe body is aluminum or titanium.
本発明の製造方法により提供された物体挟持用トングによれば、一本のパイプ体から成形されており、挟持部に近接した胴体先部（遠端部）が中空円筒断面を有することから、機械的剛性（特に、曲げ剛性）が非常に高くなるため、重厚な物体を把持した場合でも、これらの部分が簡単によじれることなく、物体を確実に把持して持ち上げることができるようになる。 According to the object sandwiching tongue provided by the manufacturing method of the present invention, the tongue for molding is formed from one pipe body, and the body tip portion (far end portion) close to the sandwiching portion has a hollow cylindrical cross section, Since the mechanical rigidity (in particular, bending rigidity) becomes extremely high, even when a heavy object is gripped, these parts do not easily get twisted, and the object can be reliably gripped and lifted.
本発明の製造装置では、サイズ違いのトングを作る場合でも、Ｕ字部（及び該Ｕ字部に近接する胴体基部（グリップ部））に形成すべき長さや形状を共通にした共用金型を採用する。この共用金型は、様々なサイズのトングを製造する場合でも、各トングのＵ字部やグリップ部を一様に成形できるため、１式の金型で様々な用途・製品に対応できるようになり、金型製作や金型取替等に要する製造上の時間・コストを大幅に低減できるようになる。 In the manufacturing apparatus of the present invention, even when making tongs of different sizes, a common mold having a common length and shape to be formed in the U-shaped portion (and the body base (grip portion) adjacent to the U-shaped portion) is used. adopt. Even when manufacturing tongs of various sizes, this shared mold can uniformly mold the U-shaped part and grip part of each tongue, so that one set of molds can be used for various applications and products. Therefore, it becomes possible to significantly reduce the manufacturing time and cost required for mold manufacturing and mold replacement.
以下、添付の図面を参照しながら下記の具体的な実施形態に基づき本発明の物体挟持用トング（以下、単に「トング」とも呼ぶ。）の技術的内容を説明するが、本発明はこれらの実施形態に何等限定されるものではない。 Hereinafter, the technical contents of the object-holding tongs (hereinafter, also simply referred to as “tongs”) of the present invention will be described based on the following specific embodiments with reference to the accompanying drawings. It is not limited to the embodiment.
（物体挟持用トング（ゴミ拾い用トング）の従来の製造方法）
本発明の製造方法の有する新規な点や従来の製法との違いを明確にする意味で、先ず、従来の製法（一般的に用いられる製法）について、図１及び図２を参照しながら説明する。ここで、図１（ａ）は、従来のトングの製造工程についてのフローチャートを示し、図１（ｂ）は、従来法の加工前後における材料の成形状態や製造装置の動作を概略的に説明した図である。
(Conventional manufacturing method of tongs for holding objects (tongs for picking up dust))
In order to clarify the novel points of the manufacturing method of the present invention and the difference from the conventional manufacturing method, first, the conventional manufacturing method (generally used manufacturing method) will be described with reference to FIGS. 1 and 2. .. Here, FIG. 1(a) shows a flow chart of a conventional tong manufacturing process, and FIG. 1(b) schematically explains a material molding state and an operation of a manufacturing apparatus before and after processing by a conventional method. It is a figure.
（工程Ｓ１０１：従来の製法で使用する原材料）
従来の製法では、先ず、原材料として、図１（ｂ）や図８（ａ）の上段に示すような、平坦な長尺薄板体１０１（以下、「フラットバー」とも呼ぶ。）１０１を用意する（工程Ｓ１０１）。フラットバー１０１は、例えば、ステンレス（ＳＵＳ４３０）、鉄（ＳＰＣＣ）、亜鉛（ＳＧＣＣ）などの金属製板が使用される。
(Step S101: Raw material used in conventional manufacturing method)
In the conventional manufacturing method, first, as a raw material, a flat long thin plate member 101 (hereinafter, also referred to as “flat bar”) 101 as shown in the upper stage of FIG. 1B and FIG. 8A is prepared. (Step S101). For the flat bar 101, for example, a metal plate made of stainless steel (SUS430), iron (SPCC), zinc (SGCC), or the like is used.
（従来の製法で使用する半部成形用金型）
従来の製法では、図１（ｃ）に示すような半部成形用金型１１０を使用する。この半部成形用金型１１０は、一対の上型１１１及び下型１１２とで構成される。上型１１１には、フラットバー１０１の半部１０１Ｌ，１０１Ｒの長さＨＬに対応した長さを有しかつ成形後のトング半部の形状を付与するための凸部１１３が設けられる。一方、下型１１２には上述の凸部１１３に対応する長さおよび形状を有した凹部１１４が設けられる。
(Mold for forming half part used in conventional manufacturing method)
In the conventional manufacturing method, a half-molding die 110 as shown in FIG. 1(c) is used. This half-molding die 110 is composed of a pair of an upper die 111 and a lower die 112. The upper die 111 is provided with a convex portion 113 having a length corresponding to the length HL of the half portions 101L and 101R of the flat bar 101 and imparting the shape of the tongue half portion after molding. On the other hand, the lower mold 112 is provided with a concave portion 114 having a length and shape corresponding to the above-mentioned convex portion 113.
（工程Ｓ１０２：一方の半部へのプレス成形）
このような半部成形用金型１１０において、図１（ｃ）に示すように、フラットバー１０１の一方（例えば、右側）の半部１０１Ｒを前方に向けて該半部１０１Ｒを上型１１１と下型１１２と間に配置した後、上型１１１を下型１１２に向けて押圧（プレス）成形する（工程Ｓ１０２）。これにより、図１（ｂ）の中段及び図１（ｃ）の右側のフラットバー１０１に示すように、右側半部１０１Ｒに所望のトング形状を付与することができる。
(Step S102: Press molding on one half)
In such a half part molding die 110, as shown in FIG. 1C, one half part 101R of the flat bar 101 (for example, the right side) is directed forward and the half part 101R is referred to as an upper mold 111. After being arranged between the lower mold 112 and the lower mold 112, the upper mold 111 is pressed (pressed) toward the lower mold 112 (step S102). As a result, a desired tong shape can be imparted to the right half 101R as shown in the middle part of FIG. 1B and the flat bar 101 on the right side of FIG. 1C.
（工程Ｓ１０３：他方の半部へのプレス成形）
次に、フラットバー１０１の姿勢を１８０°回転させて他方（左側、未加工側）の半部１０１Ｌを前方に出して半部成形用金型１１０に載置し、上述の右側半部１０１Ｒに行ったプレス成形と同様の工程を残りの左側半部１０１Ｌに対しても実行する（工程Ｓ１０３）。
(Step S103: Press molding on the other half)
Next, the posture of the flat bar 101 is rotated by 180°, the other half (left side, unprocessed side) of the half portion 101L is moved forward and placed on the half portion molding die 110, and the right half portion 101R is placed on the right half portion 101R. The same process as the press molding performed is performed on the remaining left half 101L (process S103).
上述の工程Ｓ１０３，１０４が終了すると、図１（ｂ）の下段又は図８（ｂ）に示すように、一直線に延びたフラットバー１０１の双方の半部１０１Ｌ，１０１Ｒに、中央部１ｃを中心に対称のトング形状が付与されることになる。 When the above-described steps S103 and 104 are completed, as shown in the lower part of FIG. 1B or FIG. 8B, the central portion 1c is centered on both half portions 101L and 101R of the flat bar 101 extending in a straight line. A symmetrical tong shape will be given to.
（工程Ｓ１０４：中央部へのＵ字折り曲げ工程）
次に、後述する別の金型１２０（Ｕ字折り曲げ機）を用意して、フラットバー１０１の中央部１０１ｃをＵ字状に折り曲げて両側の先端部１０２Ｌ，１０２Ｒが同じ方向に向くように成形する（工程Ｓ１０４）。ここで、Ｕ字折り曲げ機１２０は、図２（ａ）に示すように、押圧体１２２を含んだ上型１２１と、この押圧体１２２を受け入れ可能なＵ字成形用凹部１２４を有した下型１２３と、から構成される。
(Process S104: U-shaped bending process to the central portion)
Next, another mold 120 (U-shaped bending machine) described later is prepared, and the central portion 101c of the flat bar 101 is bent into a U-shape so that the tip portions 102L and 102R on both sides face in the same direction. (Step S104). Here, as shown in FIG. 2( a ), the U-shaped bending machine 120 has a lower mold having an upper mold 121 including a pressing body 122 and a U-shaped recess 124 capable of receiving the pressing body 122. And 123.
工程Ｓ１０４では、フラットバー１０１の内面側の中央部１０１ｃが、この凹部１２４の真上に位置するように、該フラットバー１０１の左右の半部１０１Ｌ，１０１Ｒを下型１２３の上面１２５に載置する。そして、図２（ｂ）に示すように、押圧体１２２を徐々に鉛直方向下側に移動させ、フラットバー１０１の中央部１０１ｃに接触させ、その後も凹部１２４に向けてさらに押し込んでいく。そうすると、フラットバー１０１との接触後の押圧体１２２の押込み距離に応じて、左右の半部１０１Ｌ，１０１Ｒの先端部１０２Ｌ，１０２Ｒが互いに近づくように移動するように折り曲げられていき、所定の折り曲げ角度θを有したＵ字部１０１Ｕが形成され、ひいては、図２（ｃ）に示すような最終的なトング１０１Ｔが出来上がるのである。 In step S104, the left and right halves 101L and 101R of the flat bar 101 are placed on the upper surface 125 of the lower mold 123 so that the central portion 101c on the inner surface side of the flat bar 101 is located right above the recess 124. To do. Then, as shown in FIG. 2B, the pressing body 122 is gradually moved downward in the vertical direction to be brought into contact with the central portion 101c of the flat bar 101, and thereafter it is further pushed toward the concave portion 124. Then, the tip portions 102L and 102R of the left and right halves 101L and 101R are bent so as to move toward each other in accordance with the pushing distance of the pressing body 122 after the contact with the flat bar 101, and the predetermined bending is performed. The U-shaped portion 101U having the angle θ is formed, and the final tongue 101T as shown in FIG. 2C is completed.
（従来技術の製造上の問題点）
工程Ｓ１０２，Ｓ１０３では、半部成形用金型１１０（の上型１１１及び下型１１２）に、一方の半部１０１Ｒの基端部１０３Ｒから先端部１０２Ｒまでに対応したトング形状を付与するための凸部１１３及び凹部１１４を形成しなければならないために、サイズ違いの製品（例えば、半部１０１Ｌ，１０１Ｒの長さＨＬのみ異なるトング）を数種類（例えば、大・中・小の３種類）製造しようとすると、その種類（サイズ）の数だけ半部成形用金型１１０も必要となってしまう。また、顧客からの特別注文に対応したトングを作ろうとすると、上記金型１１０の製作から着手しなければならない。
(Problems in manufacturing conventional technology)
In steps S102 and S103, a half-molding die 110 (upper mold 111 and lower mold 112) is provided with a tong shape corresponding to the base end portion 103R to the front end portion 102R of the one half portion 101R. Since the convex portion 113 and the concave portion 114 have to be formed, several kinds of products (for example, three kinds of large, medium and small) having different sizes (for example, tongs different only in the length HL of the half portions 101L and 101R) are manufactured. If this is attempted, as many half molds 110 as that type (size) are required. In addition, when trying to make a tong corresponding to a special order from a customer, it is necessary to start from the production of the mold 110.
また、フラットバー１０１の半部長ＨＬが長くなればなる程、半部成形用金型１１０が大型化してしまう問題もある。このように従来技術では、サイズ違いのトングを作る場合には、その都度、金型１１０を変更する作業を作業者等に強いるだけでなく、金型製作費や金型保管場所を増大させてしまうといった問題点を抱えている。 There is also a problem that the half-part forming die 110 becomes larger as the half-part length HL of the flat bar 101 becomes longer. As described above, in the prior art, when making tongs of different sizes, not only the operator is required to change the mold 110 each time, but also the mold manufacturing cost and the mold storage space are increased. It has a problem that it gets lost.
（従来技術で製造された製品の使用上の問題点）
また、従来法は、製造工程に起因する上記問題点のみならず、その従来法によって製造された結果物たるトングにも、由々しき問題点をはらんでいる。具体的には、従来方法は、上述のフラットバー１０１を用いてトング１０１Ｔを製造している。これにより必然的に、最終製品１０１Ｔの断面も扁平な矩形になるため、機械的剛性が低く、先端部１０２Ｌ，１０２Ｒで図示しない物体を掴んだときに、これに近接した半部１０１Ｌ，１０１Ｒが物体からの反力を受けて歪んでしまい、物体をしっかり掴めない、又は、操作者の握力を更に強めないと物体を把持し続けられない、といった問題点（不満の声）が需要者から届けられている。
(Problems in using products manufactured by conventional technology)
Further, the conventional method has not only the above-mentioned problems caused by the manufacturing process but also a serious problem in the tongue which is the resultant product manufactured by the conventional method. Specifically, in the conventional method, the tongue 101T is manufactured using the flat bar 101 described above. As a result, the final product 101T inevitably has a flat rectangular cross section, so that the mechanical rigidity is low, and when an object (not shown) is grasped by the tip end portions 102L and 102R, the half portions 101L and 101R close to the end portions 102L and 102R are Consumers report problems (dissatisfied voice) that they are distorted by the reaction force from the object and cannot hold the object firmly, or that they cannot continue to hold the object unless the grip strength of the operator is further strengthened. Has been.
なお、使用上必要な剛性を担保するため、フラットバー１０１の金属材料は、現実的には、ステンレスや鉄など剛性が高くて重量のあるものに制限されるため、トングの更なる軽量化が改善しない要因となっている。 In order to secure the rigidity necessary for use, the metal material of the flat bar 101 is practically limited to a material having high rigidity and weight such as stainless steel or iron. It is a factor that does not improve.
（本発明のトングの製造方法）
従来法から起因する様々な上記問題点に対して、本発明者は、後述の斬新かつユニークな方法を採用することで、製造上の問題点や最終製品の性能面の問題点を見事に解決している。図３は、本発明の製造工程を説明したフローチャートを示し、図４〜図７は、本発明の各製造工程のおける材料の成形状態や製造装置の動作を概略的に説明した図である。また、図８〜１０は、従来法や本発明の製造装置にてトングを実際に加工する様子を示した画像である。
(Method for producing tongs of the present invention)
In order to solve the above-mentioned various problems caused by the conventional method, the present inventor has solved the problem in manufacturing and the problem in the performance of the final product by adopting the novel and unique method described later. doing. FIG. 3 is a flow chart for explaining the manufacturing process of the present invention, and FIGS. 4 to 7 are diagrams schematically explaining the molding state of the material and the operation of the manufacturing apparatus in each manufacturing process of the present invention. 8 to 10 are images showing how tongs are actually processed by the conventional method or the manufacturing apparatus of the present invention.
（工程Ｓ１：本発明の製法で使用する原材料）
本発明の製法では、原材料に従来法で使用していたフラットバー１０１は使用しない。本発明では、これに代えて、図４（ａ）に示すような長尺中空円筒体１（以下、「長尺パイプ体」又は「バイプ体」とも呼ぶ。）を用意する（材料用意工程Ｓ１）。このように、本発明では、原材料の形状・構造からして従来法と全く異なることに留意されたい。長尺パイプ体１は、後述の工程Ｓ３の折り曲げ加工が可能であれば如何なる金属材料を選択してもよい。但し、後述するようにアルミニウム（例えば、Ａ６０６３、Ａ５２５０）やチタンなどの金属を使用すれば最終製品（トング）の軽量化が実現する。
(Step S1: Raw material used in the production method of the present invention)
In the manufacturing method of the present invention, the flat bar 101 used in the conventional method as a raw material is not used. In the present invention, instead of this, a long hollow cylindrical body 1 as shown in FIG. 4(a) (hereinafter, also referred to as "long pipe body" or "bipe body") is prepared (material preparation step S1). ). Thus, it should be noted that the present invention is completely different from the conventional method due to the shape and structure of the raw material. For the long pipe body 1, any metal material may be selected as long as it can be bent in step S3 described later. However, as will be described later, if a metal such as aluminum (for example, A6063, A5250) or titanium is used, the final product (tongue) can be reduced in weight.
（工程Ｓ２：中央部及び胴体基端部への押圧成形）
この一本の長尺パイプ体１は、後述する第１金型１０（中央部潰し手段）を用いて、先ず、中央部１ｃ（最終製品ではＵ字部１Ｕに相当）と、この中央部１ｃ両側の近接部分３Ｌ，３Ｒ（最終製品では胴体基端部に相当）との領域のみに押圧成形を施す点を特徴とする（中央部潰し工程Ｓ２）。なお、後述するグリップ部４Ｌ，４Ｒを最終製品に付与しない場合又は図示しない別部材でもって後付けするような場合は、工程Ｓ２において、中央部１ｃのみに押圧成形してもよい。また、第１金型１０は、後述するように、上型１１と、下型１５と、を有する。
(Step S2: Press molding on the central portion and the body base end portion)
This single long pipe body 1 uses a first die 10 (central portion crushing means) described later to first form a central portion 1c (corresponding to U-shaped portion 1U in the final product) and the central portion 1c. It is characterized in that the press molding is applied only to the regions on both sides of the adjacent portions 3L and 3R (corresponding to the base end portion of the body in the final product) (central portion crushing step S2). In addition, when the grip parts 4L and 4R which will be described later are not applied to the final product or when the grip parts 4L and 4R are to be retrofitted by another member not shown in the drawing, in step S2, only the central part 1c may be pressed. The first mold 10 has an upper mold 11 and a lower mold 15, as described later.
（工程Ｓ２に使用する第１金型の上型）
ここで、図４（ｂ）に示すように、上型１１には、中央凹部１２と、この中央凹部１２内の底面に設けられた上側押圧面１２ａが設けられる。さらに、中央凹部１２の左右両側から外方一直線状にグリップ溝１３が延びている。グリップ溝１３は、断面形状が上型１１の左右（つまり、グリップ溝１３の長手方向）に連続的に変化し、かつ、後述の下型１５のパイプ溝１７の溝深さよりも浅い深さを有する。
(Upper die of the first die used in step S2)
Here, as shown in FIG. 4( b ), the upper mold 11 is provided with a central recess 12 and an upper pressing surface 12 a provided on the bottom surface of the central recess 12. Further, grip grooves 13 extend outward from the left and right sides of the central recess 12 in a straight line. The grip groove 13 has a cross-sectional shape that continuously changes to the left and right of the upper mold 11 (that is, the longitudinal direction of the grip groove 13) and has a depth shallower than the groove depth of the pipe groove 17 of the lower mold 15 described later. Have.
（工程Ｓ２に使用する第１金型の下型）
一方、図４（ｃ）に示すように、下型１５には、中央凹部１６と、この中央凹部１６内の底面に設けられた下側押圧面１６ａが設けられる。中央凹部１６の左右両側から外方一直線状にパイプ溝１７が順に延びている。下側押圧面１６ａの一部には段差が付いていてもよい。具体的には、中央凹部１６の幅方向両側がやや凹んだビード溝１６ｂが形成されている。パイプ溝１７は、載置されるべきパイプ体１の円筒断面の下側半円に対応する断面を有している。
(Lower die of the first die used in step S2)
On the other hand, as shown in FIG. 4C, the lower mold 15 is provided with a central concave portion 16 and a lower pressing surface 16 a provided on the bottom surface of the central concave portion 16. Pipe grooves 17 sequentially extend in a straight line outward from both left and right sides of the central recess 16. A step may be formed on a part of the lower pressing surface 16a. Specifically, a bead groove 16b is formed in which the widthwise sides of the central recess 16 are slightly recessed. The pipe groove 17 has a cross section corresponding to the lower semicircle of the cylindrical cross section of the pipe body 1 to be placed.
（工程Ｓ２により生じた扁平中央部、グリップ部、及びビード加工部）
このような構成の下側押圧面１６ａ，パイプ溝１７，１７のそれぞれに、パイプ体１の中央部１ｃと基端部３Ｌ，３Ｒが座するように、パイプ体１を下型１５に載置した後、上型１１を下型１５に向けて押圧することで、パイプ体１の中央部１ｃを平坦に潰すことができる。これと同時に、中央部１ｃの隣の基端部３Ｌ，３Ｒの上側にグリップ形状（グリップ部４Ｌ，４Ｒ）を付与し、中央部１ｃの下側に段差に対応した形状（ビード加工部５）を付与することもできる。このビード加工部５が付与されることにより、中央部１ｃの剛性をさらに高めることができる。なお、パイプ体１のうち、下型１５のパイプ溝１７に置かれたパイプ体１の基端部３Ｌ，３Ｒの下側胴部は、上型１１と下型１５とに完全に挟まれても、一切変形することはない。
(Flat central portion, grip portion, and bead processing portion generated in step S2)
The pipe body 1 is placed on the lower mold 15 such that the central portion 1c of the pipe body 1 and the base end portions 3L and 3R are seated on the lower pressing surface 16a and the pipe grooves 17 and 17 having such a configuration, respectively. After that, by pressing the upper die 11 toward the lower die 15, the central portion 1c of the pipe body 1 can be flattened. At the same time, a grip shape (grip portions 4L, 4R) is provided on the upper side of the base end portions 3L, 3R adjacent to the central portion 1c, and a shape corresponding to a step is formed on the lower side of the central portion 1c (bead processing portion 5). Can also be given. By providing this beaded portion 5, the rigidity of the central portion 1c can be further increased. In the pipe body 1, the lower body portions of the base end portions 3L and 3R of the pipe body 1 placed in the pipe groove 17 of the lower die 15 are completely sandwiched between the upper die 11 and the lower die 15. However, it does not deform at all.
（工程Ｓ３：中央部の折り曲げ加工）
第１金型１０によって加工されたパイプ体１は、次に、後述する第２金型（Ｕ字折り曲げ手段）２０に載置され、その後、その中央部１ｃを基点にＵ字状に折り曲げられる（Ｕ字折り曲げ工程Ｓ３）。
(Process S3: bending of the central portion)
The pipe body 1 processed by the first mold 10 is then placed on a second mold (U-shaped bending means) 20 described below, and then bent into a U-shape with the central portion 1c as a base point. (U-shaped bending step S3).
（工程Ｓ３で使用する第２金型）
ここで、第２金型（Ｕ字折り曲げ手段）２０は、図５（ｂ）に示すように、押圧体２２を含んだ上型２１と、この押圧体２２を受け入れ可能な凹部２４を有した下型２３と、から構成される。押圧体２２の形状は、奥行方向（前後方向）には同一であり、その先端にＵ字に対応する輪郭２２ａを有する。下型２３は、図５（ａ）に示すように、上面２３ａと、上面２３ａの一部から開口した上記凹部２４と、が設けられた本体２５を有する。この凹部２４の中央には、押圧体２２の進入を許容可能な空間２４ａが形成され、その左右に一対の補助輪２６，２６が設けられる。
(Second mold used in step S3)
Here, as shown in FIG. 5B, the second mold (U-shaped bending means) 20 has an upper mold 21 including a pressing body 22 and a recess 24 capable of receiving the pressing body 22. And a lower mold 23. The pressing body 22 has the same shape in the depth direction (front-back direction) and has a contour 22a corresponding to a U-shape at its tip. As shown in FIG. 5A, the lower mold 23 has a main body 25 provided with an upper surface 23a and the above-mentioned recess 24 opened from a part of the upper surface 23a. A space 24a that allows the pressing body 22 to enter is formed in the center of the recess 24, and a pair of auxiliary wheels 26, 26 are provided on the left and right sides thereof.
そして、パイプ体１の中央部（潰れ部）１ｃを凹部２４の真上におき、ビード加工部５を上に（つまり、グリップ部４Ｌ，４Ｒを下に）向けながらパイプ体１の基端部３Ｌ，３Ｒを、凹部２４に近接した上面２３ａに載置する。この状態で、上型２１の押圧体２２を下型２３に向けて移動させ、この押圧体２２を中央部１ｃに接触させた後も更に移動させて、この中央部１ｃを基点にパイプ体１をＵ字状に折り曲げる（Ｕ字折り曲げ工程Ｓ３）。この工程Ｓ３を行う間に、中央部１ｃの両側のパイプ胴体１Ｌ（３Ｌ），１Ｒ（３Ｒ）の成す角は１８０°からθ＝１０°〜３０°程度の鋭角になる。 Then, the central portion (crushed portion) 1c of the pipe body 1 is placed directly above the recessed portion 24, and the bead processed portion 5 is directed upward (that is, the grip portions 4L, 4R are directed downward), and the base end portion of the pipe body 1 is positioned. 3L and 3R are placed on the upper surface 23a near the recess 24. In this state, the pressing body 22 of the upper mold 21 is moved toward the lower mold 23, and is further moved even after the pressing body 22 is brought into contact with the central portion 1c, and the pipe body 1 is made with the central portion 1c as a base point. Is bent into a U-shape (U-shaped bending step S3). During this step S3, the angle formed by the pipe bodies 1L (3L) and 1R (3R) on both sides of the central portion 1c becomes an acute angle of 180° to θ=10° to 30°.
（工程Ｓ４：一方（第１）の先端部の潰し成形（扁平化））
しかしながら、上記工程Ｓ１〜Ｓ３では、パイプ体１の両側（第１・第２）の先端部２Ｌ，２Ｒについては、なんら加工が施されていないため、上記工程Ｓ３の終了時点では、両側部分は中空筒状のままである。そこで、後述の第３金型（先端部潰し手段）３０を用いて、第１・第２の先端部２Ｌ，２Ｒを一つずつ扁平に潰し成形する（第１・第２端の潰し工程Ｓ４，Ｓ５）。
(Step S4: Crush forming (flattening) of one (first) tip portion)
However, in the steps S1 to S3, since the tip portions 2L and 2R on both sides (first and second) of the pipe body 1 are not processed, at the end of the step S3, both side portions are not processed. It remains a hollow cylinder. Therefore, the first and second tip portions 2L and 2R are flatly crushed one by one using a third mold (tip crushing means) 30 described later (first and second end crushing step S4). , S5).
（第３金型（先端部潰し手段））
第３金型３０は、具体的には、図６（ａ）に示すように、上側押圧面３２（図中、破線参照）を有した上型３１と、下型押圧面３４を有した下型３３とを有する。下型３３には、この工程Ｓ４中にパイプ体１の幅方向又は前方向の移動を制限する先端位置決めガイド３５，３６を有する。これにより、パイプ体１の第１の先端部２Ｌを下側押圧面３４の所定位置に保持・固定しながら上側押圧面３２で第１の先端部２Ｌに向けて押し当ててこの部分を扁平に押し潰すことができる、図６（ａ）の破線部分も参照されたい。なお、図６（ｂ）は、工程Ｓ４の成形前の先端部２Ｌ（２Ｒ）を示す一方、図６（ｃ）は、工程Ｓ４の成形後の先端部２Ｌを示す。
(Third mold (tip crushing means))
Specifically, as shown in FIG. 6A, the third mold 30 has an upper mold 31 having an upper pressing surface 32 (see broken lines in the drawing) and a lower mold having a lower mold pressing surface 34. And a mold 33. The lower die 33 has tip positioning guides 35, 36 for limiting the movement of the pipe body 1 in the width direction or the front direction during the step S4. As a result, the first tip portion 2L of the pipe body 1 is held and fixed at a predetermined position on the lower pressing surface 34, and is pressed against the first tip portion 2L by the upper pressing surface 32 to flatten this portion. See also the dashed portion of Figure 6(a), which can be crushed. 6B shows the tip 2L (2R) before molding in step S4, while FIG. 6C shows the tip 2L after molding in step S4.
更に、下型３３には、上記潰し成形の間、一方のパイプ半部１Ｌの第１の先端部２Ｌと、他方のパイプ半部１Ｒの第２の先端部２Ｒと、を水平に保持する水平度保持ガイド３７を備えることが好ましい。水平度保持ガイド３７は、一方のパイプ体半部１Ｌの胴体を支持する第１受け部３７ａと、他方のパイプ体半部１Ｒの胴体を支持する第２受け部３７ｂと、を有する。 Further, the lower die 33 is configured to horizontally hold the first tip 2L of the one pipe half 1L and the second tip 2R of the other pipe half 1R during the crush molding. It is preferable to provide a degree holding guide 37. The horizontality holding guide 37 has a first receiving portion 37a that supports the body of one pipe body half 1L and a second receiving portion 37b that supports the body of the other pipe body half 1R.
（第３金型に付属の水平度保持ガイド）
この水平度保持ガイド３７（３７ａ，３７ｂ）を追設することにより、他方のパイプ半部１Ｒが一方のパイプ半部１Ｌの鉛直方向の真下に隠れるように下型３３に確実に固定された状態で、一方のパイプ体１Ｌの先端部２Ｌに潰し成形を施すことができる（第１端の潰し工程Ｓ４）。この結果として成形後の先端部２Ｌ，２Ｒの潰れ面同士の平行度も保証できるようになる。つまり、両方の先端部２Ｌ，２Ｒで物体を挟もうとした際に、一方の潰れ面と他方の潰れ面とが真正面から向い合いながらぴったりと当接するようになり、物体の把持が容易となる（図９（ｅ）参照）。もし仮にこの平行度が保てないと、一方の潰れ面が他方の潰れ面に対して傾斜する、すなわち、一方の潰れ面が異なる方面を臨むことになるため、物体を上手く把持できない原因となる（図９（ｆ）参照）。
(Leveling guide attached to the third mold)
By additionally installing the horizontality holding guide 37 (37a, 37b), the other pipe half portion 1R is securely fixed to the lower mold 33 so as to be hidden right below the one pipe half portion 1L in the vertical direction. Then, the tip portion 2L of the one pipe body 1L can be crushed and shaped (first end crushing step S4). As a result, the parallelism between the crushed surfaces of the front end portions 2L and 2R after molding can be guaranteed. That is, when an object is to be sandwiched between the two end portions 2L and 2R, the one crushed surface and the other crushed surface are brought into close contact with each other while facing each other from the front, facilitating grasping of the object. (See FIG. 9(e)). If this parallelism cannot be maintained, one crushed surface will be inclined with respect to the other crushed surface, that is, one crushed surface will face a different direction, which may cause the object to not be grasped well. (See FIG. 9(f)).
（工程Ｓ５：他方（第２）の先端部の潰し成形（扁平化））
一方（第１）の先端部２Ｌに対して潰し成形を終了したら、第３金型３０において、パイプ半部２Ｌ，２Ｒの位置を反対になるように取り換えて、他方（第２）の先端部２Ｒにも同様の潰し成形を施す（第２端の潰し工程Ｓ５）。
(Step S5: Crush forming (flattening) of the other (second) tip portion)
When the crush molding is completed for the one (first) tip 2L, in the third mold 30, the positions of the pipe halves 2L, 2R are exchanged so as to be opposite, and the other (second) tip 2L is replaced. The same crushing molding is also applied to 2R (second end crushing step S5).
（工程Ｓ６：一方（第１）の先端部のバリ取り及び波形状の付与）
次に、後述の第４金型４０を利用して、一方（第１）の先端部２Ｌのバリ取り（前縁部２Ｌｅの切断）と、この先端部２Ｌの中腹に波形状（ジグザグ形状、凹凸形状等の湾曲形状）２Ｌｗの付与を行う（第１先端部調節工程Ｓ６）。
(Step S6: Deburring and Corrugation of One (First) Tip)
Next, using a fourth mold 40 described later, deburring of one (first) tip portion 2L (cutting of the front edge portion 2Le) and wavy (zigzag shape, 2Lw is given (curved shape such as uneven shape) (first tip end adjusting step S6).
（第４金型（先端部調節手段））
ここで、第４金型４０は、図７（ａ）に示すように、上型４１と下型４２とを有する。下型４２の本体４２ｍは、先端部２Ｌ，２Ｒの前縁部２Ｌｅ，２Ｒｅの前方への更なる移動を制限する前縁固定ガイド４３ｆと、先端部２Ｌ，２Ｒの幅（左右）方向の更なる移動を制限する左右制限ガイド４３ｗ，４３ｗの他、バリとして切断された前縁部２Ｌｅ，２Ｒｅを落下させる抜け穴４４と、第１・第２の先端部２Ｌ，２Ｒに波形状を付与する下側波形成部４５を有する。一方、上型４１は、下型４２の抜け穴４４に向けて移動し、前縁部２Ｌｅ，２Ｒｅを切断するギロチン部４６と、下側波形成部４５に対応した形状を有し、この下側波形成部４５に向けて移動して、第１・第２の先端部２Ｌ，２Ｒのいずれかを押圧成形可能な上側波形成部４７と、を備える。
(4th mold (tip adjusting means))
Here, the fourth die 40 has an upper die 41 and a lower die 42, as shown in FIG. The main body 42m of the lower die 42 includes a front edge fixing guide 43f that restricts further movement of the front edge portions 2L and 2R to the front of the front edge portions 2Le and 2Re, and a change in the width (left and right) direction of the tip portions 2L and 2R. In addition to the left and right restricting guides 43w and 43w for restricting the movement, a through hole 44 for dropping the front edge portions 2Le and 2Re cut as burrs and a corrugated shape for the first and second tip portions 2L and 2R are provided. It has a side wave forming portion 45. On the other hand, the upper die 41 has a shape corresponding to the guillotine portion 46 that moves toward the through hole 44 of the lower die 42 and cuts the front edge portions 2Le and 2Re, and the lower wave forming portion 45. And an upper side wave forming part 47 that moves toward the wave forming part 45 and can press-mold one of the first and second tip parts 2L and 2R.
このような構成の第４金型４０の使用により、一方（第１）の先端部２Ｌにおいて前縁部２Ｌｅのバリ取り（図１０（ｅ）参照）と波状部２Ｌｗの付与を実現することができる（第１先端部調節工程Ｓ６）。実際の下型４２や実際に加工された先端部２Ｌの外観については、図１０（ａ）及び（ｂ）も参照されたい。 By using the fourth mold 40 having such a configuration, deburring of the front edge portion 2Le (see FIG. 10(e)) and provision of the wavy portion 2Lw at the one (first) tip portion 2L can be realized. It is possible (first tip end adjusting step S6). For the appearance of the actual lower die 42 and the actually processed tip portion 2L, also refer to FIGS. 10(a) and 10(b).
（工程Ｓ７：他方（第２）の先端部のバリ取り及び波形状の付与）
この後、他方（第２）の先端部２Ｒに対しても、同じ第４金型４０を用いて、前縁部２Ｒｅのバリ取りと湾曲部２Ｒｗの付与を行う（第２先端部調節工程Ｓ７）。
(Step S7: Deburring the other (second) tip portion and imparting a wavy shape)
After that, the same fourth mold 40 is also used for the other (second) tip portion 2R to deburr the front edge portion 2Re and to provide the curved portion 2Rw (second tip portion adjusting step S7). ).
（パイプ体を使用による生ずる懸念とその対策）
ところで、本発明は、一本のパイプ体１から加工しているため、潰し成形を施した第１・第２の先端部２Ｌ，２Ｒ近くの扁平化されていない胴体部分６Ｌ，６Ｒは、図７（ｃ）に示すように、真っ直ぐに延びた中空円筒体のままである。そうすると、例えば、非常に小さな物体（図示せず）を第１・第２の先端部２Ｌ，２Ｒの間で把持しようとすると、先端部２Ｌ，２Ｒ近くのパイプ胴体（遠端部）６Ｌ，６Ｒの内側（腹）同士が、物体を把持する前に先に接触してしまって、小物体を把持できない懸念が生じる。この懸念を払拭できるように、遠端部６Ｌ，６Ｒに対して、後述の内側Ｒ曲げ工程Ｓ８，Ｓ９も実行することが好ましい。
(Concerns and countermeasures for using pipes)
By the way, according to the present invention, since the single pipe body 1 is processed, the unflattened body portions 6L and 6R near the crush-molded first and second tip portions 2L and 2R are As shown in FIG. 7(c), it remains a straight hollow hollow cylinder. Then, for example, when trying to grip a very small object (not shown) between the first and second tip portions 2L and 2R, the pipe bodies (far end portions) 6L and 6R near the tip portions 2L and 2R The insides (bellys) of the two come into contact with each other before gripping an object, which may cause a concern that a small object cannot be gripped. In order to eliminate this concern, it is preferable to perform inner R bending steps S8 and S9, which will be described later, on the far end portions 6L and 6R.
（工程Ｓ８：一方の先端部及び遠端部の内側Ｒ曲げ成形）
すなわち、後述の第５金型５０（Ｒ形状付与手段）を用いて、一方の先端部２Ｌやその遠端部６Ｌに、当該先端部２Ｌが他方の先端部２Ｒに向かって近づく（垂れる）ように内側Ｒ形状を付与する（第１Ｒ形状付与工程Ｓ８，Ｓ９）。
(Step S8: Inner R Bend Forming of One Tip and Far End)
That is, by using a later-described fifth mold 50 (R shape imparting means), one tip portion 2L and its distal end portion 6L are approached (drooped) toward the other tip portion 2R. The inner R shape is given to (first R shape giving step S8, S9).
（第５金型（Ｒ形状付与手段））
第５金型５０は、図７（ｃ）に示すように、上側当接面５１ａを有した上型５１と、上側当接面５１ａに対応した下側当接面５２ａを有した下型５２とを有する。下型５２は、一方のパイプ半部１Ｌ，１Ｒの遠端部６Ｌ，６Ｒを下側から収容する下側収容溝５３と、第１・第２の先端部２Ｌ，２Ｒの位置を制限する保持ガイド５４や、これらの先端部２Ｌ，２Ｒを受ける先端部載置面５５を備える（図１０（ｄ）参照）。下側収容溝５３は、パイプ体断面に対応した半円断面を有するだけでなく、先端部２Ｌ，２Ｒに向けて徐々に下降するように湾曲したＲ形状も有する。一方、上型５１は、パイプ半部１Ｌ，１Ｒの遠端部６Ｌ，６Ｒを上側から収容し、下側収容溝５３に対応した断面形状を有した上側収容溝５６を有する（図１０（ｃ）参照）。
(Fifth mold (R shape imparting means))
As shown in FIG. 7C, the fifth mold 50 has an upper mold 51 having an upper contact surface 51a and a lower mold 52 having a lower contact surface 52a corresponding to the upper contact surface 51a. Have and. The lower mold 52 holds the lower side receiving groove 53 for receiving the far end portions 6L, 6R of the one pipe half portions 1L, 1R from the lower side and the positions of the first and second tip portions 2L, 2R. The guide 54 and the tip end placement surface 55 that receives the tip ends 2L and 2R are provided (see FIG. 10D). The lower accommodation groove 53 has not only a semicircular cross section corresponding to the cross section of the pipe body but also an R shape curved so as to gradually descend toward the tip portions 2L and 2R. On the other hand, the upper die 51 accommodates the distal end portions 6L, 6R of the pipe halves 1L, 1R from the upper side and has an upper accommodation groove 56 having a cross-sectional shape corresponding to the lower accommodation groove 53 (FIG. 10(c). )reference).
このような構成の下型５２に一方の先端部２Ｌ及び胴体の遠端部６Ｌを載置し、上型５１の上側当接面５１ａを下型５２の下側当接面５２ａに近づけていき、下型５２内に載置された先端部２Ｌ及び遠端部６Ｌを押圧することで、図示のような内側Ｒ形状を付与することができる（第１Ｒ形状付与工程Ｓ８）。 The one tip 2L and the distal end 6L of the body are placed on the lower die 52 having such a configuration, and the upper contact surface 51a of the upper die 51 is brought closer to the lower contact surface 52a of the lower die 52. By pressing the distal end portion 2L and the distal end portion 6L placed in the lower mold 52, it is possible to impart an inner R shape as illustrated (first R shape imparting step S8).
（工程Ｓ９：他方（第２）の先端部及び遠端部の内側Ｒ曲げ成形）
この後、他方（第２）の先端部２Ｒ及び遠端部６Ｒに対しても、同じ第５金型５０を用いて、内側Ｒ形状を付与することができる（第２Ｒ形状付与工程Ｓ９）。
(Step S9: Inner R-bending of the other (second) tip and far end)
Thereafter, the inner R shape can be imparted to the other (second) tip portion 2R and the far end portion 6R by using the same fifth mold 50 (second R shape imparting step S9).
以上の工程Ｓ１〜Ｓ９を用いて本発明の物体挟持用トング１Ｔを作り上げることができる（図１０（ｆ）も参照）。これにより、全長が異なるパイプ体１を材料として用いても、この単一の第１金型１０で、中央部１ｃや基端部３Ｌ，３Ｒのみに共通の形状を付与することができる。これにより、中央部１ｃや基端部３Ｌ，３Ｒの加工形状を共通化し、パイプ体１の全長が、共通仕様で加工すべき中央部１ｃ及び基端部３Ｌ，３Ｒの長さ以上であれば、その後、それぞれの先端部２Ｌ，２Ｒの側を加工できる各金型２０，３０，４０，５０を利用すれば、どんな長さのパイプ体１を採用しても、一式の共用の装置群１０〜５０で全て加工できるようになる。すなわち、本発明であれば、サイズ毎に成型金型をいくつも作る必要がない。 By using the above steps S1 to S9, the object holding tongue 1T of the present invention can be completed (see also FIG. 10(f)). Accordingly, even if the pipe bodies 1 having different total lengths are used as the material, the single first mold 10 can give a common shape only to the central portion 1c and the base end portions 3L and 3R. As a result, the machining shapes of the central portion 1c and the proximal end portions 3L, 3R are made common, and the overall length of the pipe body 1 is equal to or more than the length of the central portion 1c and the proximal end portions 3L, 3R to be processed according to the common specifications. After that, if each die 20, 30, 40, 50 that can process the respective end portions 2L, 2R is used, no matter what length the pipe body 1 is adopted, a set of common device group 10 can be used. Everything can be processed in ~50. That is, according to the present invention, it is not necessary to make several molding dies for each size.
つまり、本発明の製造装置を構成する上述の金型１０〜５０を一式用意すれば、先端部２Ｌ，２Ｒと基端部３Ｌ，３Ｒとの間の半部（胴体）１Ｌ，１Ｒの未加工の長さが異なってくるだけで、サイズ違いのトングでも特注長さを有したトングでも簡単に製造することができる。 In other words, if a set of the above-mentioned molds 10 to 50 constituting the manufacturing apparatus of the present invention is prepared, the unprocessed half parts (body) 1L, 1R between the front end parts 2L, 2R and the base end parts 3L, 3R are processed. It is possible to easily manufacture tongs of different sizes or tongues with a custom-made length only by changing the lengths of the tongues.
なお、上述の工程Ｓ６〜Ｓ９は、必ず実施する必要は無い。例えば、工程Ｓ４，Ｓ５での潰し成形により扁平化した先端部２Ｌ，２Ｒの夫々に、これらを覆うゴム製又は樹脂製のキャップ（図示せず）を取り付けることで、先端部２Ｌ，２Ｒのバリ取りや、内側Ｒ形状付与の作業をなくしても良い場合がある。 Note that the above steps S6 to S9 do not necessarily have to be performed. For example, by attaching a rubber-made or resin-made cap (not shown) covering each of the tip portions 2L, 2R that have been flattened by the crushing molding in the steps S4, S5, the burrs of the tip portions 2L, 2R are attached. In some cases, the work of removing the inner R shape may be eliminated.
（本発明の機械的剛性の検討）
次に、以上のように製造された本発明のトングの機械的剛性について検証してみる。図１０（ｆ）に、本実施例のトング１Ｔと、比較例の従来品（当社既製品）１０１Ｔと、を用いて、その仕様や物性値の評価を行った。
(Study of mechanical rigidity of the present invention)
Next, the mechanical rigidity of the tongue of the present invention manufactured as described above will be verified. In FIG. 10F, the specifications and physical property values of the tongue 1T of this example and the conventional product (commercially available product) 101T of the comparative example were evaluated.
（実施例２のトングの物性値）
本実施例のトング１Ｔはアルミニウム製の中空円筒体であり、全長１２００ｍｍ（半部長ＨＬ＝６００ｍｍ）、重量（実測値）１４５ｇである。パイプ円筒の外径Ｄ＝１５ｍｍ及び厚みｔ＝１ｍｍであるため、内径はｄ＝１３ｍｍである。また、扁平化した先端部の幅ｂ＝２２ｍｍ、厚みｈ＝２ｍｍである。本実施例及び後述の比較例の各物性値については、以下の表１も参照されたい。
(Physical property values of tongs of Example 2)
The tongue 1T of this embodiment is a hollow cylindrical body made of aluminum, and has a total length of 1200 mm (half-part length HL=600 mm) and a weight (actual measurement value) of 145 g. Since the pipe cylinder has an outer diameter D=15 mm and a thickness t=1 mm, the inner diameter is d=13 mm. The width b of the flattened tip portion is 22 mm and the thickness h is 2 mm. See also Table 1 below for the respective physical property values of this example and comparative examples described below.
（比較例の既製品トングの物性値）
比較例の既製品トング１０１Ｔは、ステンレス鋼板製のフラットバーであり、全長１２００ｍｍ（半部長ＨＬ＝６００ｍｍ）、重量（実測値）２１５ｇである。フラットバー断面の幅ｂ＝２２ｍｍ、厚みｈ＝１ｍｍである。
(Physical property values of ready-made tongs of Comparative Example)
The ready-made tongs 101T of the comparative example is a flat bar made of a stainless steel plate, and has a total length of 1200 mm (half-part length HL=600 mm) and a weight (actual measurement value) of 215 g. The width b of the flat bar cross section is 22 mm and the thickness h is 1 mm.
（性能の評価及び比較）
以上の物性値を有する本実施例のトング１Ｔと、比較例のトング１０１Ｔとを用いて、需要者にとって重要な性能面を算出・対比してみた。
(Performance evaluation and comparison)
Using the tongs 1T of the present example and the tongs 101T of the comparative example having the above-mentioned physical property values, performances important for consumers were calculated and compared.
（軽量化）
先ず、本実施例のトング１Ｔは、比較例の既製品１０１Ｔとほぼ同等の全長・サイズを有するものの、材質の違いから、その重量は、表２に示すように、従来品の約６７％まで低減されていることが判る（以下の表２も参照）。
(Weight saving)
First, although the tongue 1T of this example has almost the same overall length and size as the ready-made 101T of the comparative example, the weight is up to about 67% of the conventional product as shown in Table 2 due to the difference in material. It can be seen that it has been reduced (see also Table 2 below).
（断面積Ａｃ）
本実施例のトング円筒体１Ｔの断面積Ａｃ（内部空間を除いた実体の断面積）は、約４４ｍｍ２であり、第１・第２の先端部２Ｌ，２Ｒの扁平化した部分も同様に約４４ｍｍ２である。一方、比較例の断面積Ａｃ＝２２ｍｍ２である。これにより、本実施例のトング円筒体１Ｔは、比較例の既製品１０１Ｔに比べて、約２倍の断面積を有することが判った（表２参照）。
(Cross section area Ac)
The cross-sectional area Ac (cross-sectional area of the body excluding the internal space) of the tongue cylindrical body 1T of this embodiment is about 44 mm 2 , and the flattened portions of the first and second tip portions 2L, 2R are also the same. It is about 44 mm 2 . On the other hand, the cross-sectional area Ac of the comparative example is Ac=22 mm 2 . From this, it was found that the tongue cylindrical body 1T of this example had a cross-sectional area about twice as large as that of the ready-made article 101T of the comparative example (see Table 2).
（断面２次モーメント）
次に、各例の断面２次モーメントの算出・比較を行ってみた。但し、材質の影響は考慮していない。矩形の断面２次モーメントＩｒは、以下に示す数式１を使用した。ここで、ｂ及びｈは先端部断面の幅及び高さ（厚み）である。
(Second moment of area)
Next, the second moment of area of each example was calculated and compared. However, the influence of the material is not considered. For the second moment of inertia Ir of the rectangle, Formula 1 shown below is used. Here, b and h are the width and height (thickness) of the tip section.
一方、中空円筒体（パイプ体）の断面２次モーメントＩｐは、以下に示す数式２を使用した。ここで、Ｄ及びｄは円筒体の外径及び内径である。 On the other hand, for the second moment of inertia Ip of the hollow cylindrical body (pipe body), the following Equation 2 is used. Here, D and d are the outer diameter and the inner diameter of the cylindrical body.
（比較例の先端部の断面２次モーメントＩｒの検討）
上述の数式１から、矩形断面を有する比較例の既製品の断面２次モーメントＩｒは、上記数式１から、約１．８３ｍｍ４と算出された。
(Examination of the second moment of area Ir of the tip of the comparative example)
From the above formula 1, the second moment of inertia Ir of the ready-made product of the comparative example having the rectangular cross section was calculated from the above formula 1 to be about 1.83 mm 4 .
（実施例２の先端部（２層の潰れ成形部）の断面２次モーメントＩｒ）
一方、本実施例の第１・第２の先端部２Ｌ，２Ｒにおける断面２次モーメントＩｒは、同様に数式１から、約１４．６７ｍｍ４と計算された。比較例の上記結果の８倍になっていることが判る。これは、本実施例の先端部２Ｌ，２Ｒも、比較例と同様に矩形断面を有しかつその幅ｂは変わらないが、加工後のパイプ体１は上側半円と下側半円とが扁平に潰れた２層構造であり、その厚みｈは比較例の２倍になり、これに応じて、断面２次モーメントＩｒは厚みｈの３乗となるため、結果的に８倍まで向上することが判った（表２参照）。
(Second moment of area Ir of the tip (two-layer crushed and molded portion) of Example 2)
On the other hand, the geometrical moment of inertia Ir at the first and second tip portions 2L and 2R of this example was calculated to be about 14.67 mm 4 from the same formula 1. It can be seen that the result is eight times that of the comparative example. This means that the tip portions 2L and 2R of the present example also have a rectangular cross section similarly to the comparative example and the width b thereof does not change, but the pipe body 1 after processing has an upper half circle and a lower half circle. It has a flatly crushed two-layer structure, and its thickness h is twice that of the comparative example, and accordingly, the second moment of area Ir becomes the cube of the thickness h, resulting in an improvement of up to eight times. It was found (see Table 2).
（実施例２のパイプ体胴体の断面２次モーメントＩｐの検討）
また、本実施例の先端部２Ｌ，２Ｒに近いパイプ胴体（中空円筒体）部分６Ｌ，６Ｒの断面２次モーメントＩｐは、数式２から、１０８３ｍｍ４と算出された。これは、比較例の先端部におけるＩｒのなんと約６００倍、隣接した先端部におけるＩｒの約７５倍となる、驚愕の数字になることが判った。つまり、比較例と同じ材質を選択すれば、約６００倍の機械的強度の向上が見込まれる。なお、以下の表２に、比較例と実施例との各性能評価の対比結果を示す。
(Examination of the second moment of inertia Ip of the pipe body of Example 2)
The second moment of inertia Ip of the pipe body (hollow cylindrical body) portions 6L and 6R close to the tip portions 2L and 2R of the present embodiment was calculated from Equation 2 to be 1083 mm 4 . It was found that this is a surprising number, which is about 600 times Ir at the tip of the comparative example and about 75 times Ir at the tip adjacent to the comparative example. That is, if the same material as that of the comparative example is selected, the mechanical strength is expected to be improved about 600 times. In addition, Table 2 below shows a comparison result of performance evaluations of the comparative example and the example.
（考察）
また、従来品では強度が不十分との理由から使用できなかったアルミニウムやチタン等の軽量の金属も、本発明では、この強度的な欠点が解消されるため、原材料として使用できるようになる。例えば、従来品で使用していたステンレス鋼板（ＳＵＳ４３０）のヤング率Ｅは、２００Ｎ／ｍ２である。一方、アルミニウムのヤング率Ｅは、６９Ｎ／ｍ２で、材質本来の強度は、上記ステンレス鋼板の約１／３程度の剛性しか持たないと推察されるが、本発明のパイプ体の材料として利用すれば、アルミニウム原料を使用したとしても、ステンレス製の従来品に比べても、はるかに高い強度（曲げ剛性）を有する軽量のトングが提供できることが判った。
(Discussion)
In addition, a lightweight metal such as aluminum or titanium, which cannot be used in the conventional product because of insufficient strength, can be used as a raw material in the present invention since this strength defect is eliminated. For example, the Young's modulus E of the stainless steel plate (SUS430) used in the conventional product is 200 N/m 2 . On the other hand, the Young's modulus E of aluminum is 69 N/m 2 , and it is estimated that the original strength of the material is only about 1/3 the rigidity of the stainless steel plate, but it is used as the material of the pipe body of the present invention. Then, even if the aluminum raw material is used, it has been found that it is possible to provide a lightweight tongue having much higher strength (bending rigidity) than the conventional stainless steel product.
（最終製品のトングで得られるもう一つの長所）
上述の製造装置を用いた製造方法によれば、本発明の物体挟持用トングが出来上がる。本発明者は、アルミニウムやチタンなどの軽量金属からなる長尺パイプ体から最終製品のトングを試作してみたところ、もう驚くべきもう一つの発見があった。バネ性（形状復帰能力）である。このトング業界の関係者（当業者）であれば、アルミニウムやチタンは、本来、バネ性（弾性）が低いため、トングの原材料になり得ないとの固定観念があった。
(Another advantage of the final product tongs)
According to the manufacturing method using the above-described manufacturing apparatus, the tongue for pinching the object of the present invention is completed. The present inventor has made another surprising finding when he prototyped a tongue of a final product from a long pipe body made of a lightweight metal such as aluminum or titanium. It has springiness (shape recovery ability). Those involved in the tongs industry (those skilled in the art) had a stereotype that aluminum and titanium originally have low elasticity (elasticity) and therefore cannot be used as raw materials for tongs.
（最終製品のトングの形状復帰能力）
しかしながら、本発明に従って試作したアルミニウム製又はチタン製のトングは、そのグリップ部を素手で掴んでその挟持力を増減してみると、従来のステンレス製の既製品と同等又はそれ以上に、一対の先端部又はパイプ胴体が元の形状・位置に直ぐに戻る（復帰する）ため、トングとして非常に使い易く、物体を把持しやすいことが判った。この理由は現状、正確には判らないが、おそらく（１）全て一本のパイプ体で形成されていること、（２）その一本の中空パイプ体の中央領域を上下方向に潰してＵ字部を形成していることで、アルミニウム本来のヤング率では予想できない、パイプ体の最終加工形状に起因するバネ性（形状復帰能力）が発揮されるものと思われる。
(Ability to restore the tongue shape of the final product)
However, the aluminum or titanium tongue prototyped according to the present invention has a pair of equal or more than the conventional stainless steel ready-made products when the grip portion is grasped with bare hands and the clamping force is increased or decreased. It was found that the tip or the pipe body immediately returns (returns) to the original shape and position (returns), which makes it extremely easy to use as a tongue and easy to grip an object. Although the reason for this is not exactly known at present, it is probably (1) that all of them are made of one pipe body, and (2) the central region of the one hollow pipe body is crushed vertically to make a U-shape. By forming the portion, it is considered that the spring property (shape restoring ability) due to the final processed shape of the pipe body, which cannot be predicted by the original Young's modulus of aluminum, is exhibited.
本発明の製造方法により提供された物体挟持用トングによれば、一本のパイプ体から成形されており、挟持部に近接した胴体先部（遠端部）が中空円筒断面を有することから、機械的剛性（特に、曲げ剛性）が非常に高くなるため、重厚な物体を把持した場合でも、これらの部分が簡単によじれることなく、物体を確実に把持して持ち上げることができるようになる。 According to the object sandwiching tongue provided by the manufacturing method of the present invention, the tongue for molding is formed from one pipe body, and the body tip portion (far end portion) close to the sandwiching portion has a hollow cylindrical cross section, Since the mechanical rigidity (in particular, bending rigidity) becomes extremely high, even when a heavy object is gripped, these parts do not easily get twisted, and the object can be reliably gripped and lifted.
本発明の製造装置では、サイズ違いのトングを作る場合でも、Ｕ字部（及び該Ｕ字部に近接する胴体基部（グリップ部））に形成すべき長さや形状を共通にした共用金型を採用する。この共用金型は、様々なサイズのトングを製造する場合でも、各トングのＵ字部やグリップ部を一様に成形できるため、１式の金型で様々な用途・製品に対応できるようになり、金型製作や金型取替等に要する製造上の時間・コストを大幅に低減できるようになる。 In the manufacturing apparatus of the present invention, even when making tongs of different sizes, a common mold having a common length and shape to be formed in the U-shaped portion (and the body base (grip portion) adjacent to the U-shaped portion) is used. adopt. Even when manufacturing tongs of various sizes, this shared mold can uniformly mold the U-shaped part and grip part of each tongue, so that one set of molds can be used for various applications and products. Therefore, it becomes possible to significantly reduce the manufacturing time and cost required for mold manufacturing and mold replacement.
このように、本発明のトングは、清掃活動、アウトドア、調理、医療などの様々な分野で利用可能性及び利用価値が非常に高い。 As described above, the tongs of the present invention have very high availability and utility value in various fields such as cleaning activities, outdoor activities, cooking, and medical care.
１ 長尺中空円筒体（パイプ体）
１ｃ パイプ体の中央部
１Ｌ，１Ｒ パイプ体の半部
１Ｔ 物体挟持用トング（本発明の製造方法により完成したトング）
１Ｕ パイプ体の成形後のＵ字部
２Ｌ，２Ｒ パイプ体の第１・第２の先端部
３Ｌ，３Ｒ パイプ体の第１・第２の基端部
４Ｌ，４Ｒ パイプ体の成形後のグリップ部
５ パイプ体の中央部に成形されるビード加工部
６Ｌ，６Ｒ パイプ体の第１・第２の遠端部
１０ 第１金型（中央部潰し手段）
２０ 第２金型（Ｕ字折り曲げ手段）
３０ 第３金型（先端部潰し手段）
４０ 第４金型（先端部調節手段）
５０ 第５金型（Ｒ形状付与手段）
Ｓ１ 材料用意工程
Ｓ２ 中央部潰し工程
Ｓ３ Ｕ字折り曲げ工程
Ｓ４，Ｓ５ 第１端潰し工程，第２端潰し工程
Ｓ６，Ｓ７ 第１先端部調節工程，第２先端部調節工程
Ｓ８，Ｓ９ 第１Ｒ形状付与工程，第２Ｒ形状付与工程
ＨＬ フラットバー又はパイプ体の半部長
Ｉｒ，Ｉｐ 先端部の断面２次モーメント，円筒体の断面２次モーメント
1 Long hollow cylinder (pipe)
1c Central part of pipe body 1L, 1R Half part of pipe body 1T Object holding tongs (tongs completed by the manufacturing method of the present invention)
1U U-shaped part after molding of pipe body 2L, 2R First and second tip parts of pipe body 3L, 3R First and second base end parts of pipe body 4L, 4R Grip part after molding of pipe body 5 Bead processing part formed in the central part of the pipe body 6L, 6R First and second far end parts of the pipe body 10 First mold (central part crushing means)
20 Second mold (U-shaped bending means)
30 Third mold (tip crushing means)
40 Fourth mold (tip adjusting means)
50 5th mold (R shape imparting means)
S1 material preparation step S2 central part crushing step S3 U-shaped bending step S4, S5 first end crushing step, second end crushing step S6, S7 first tip adjusting step, second tip adjusting step S8, S9 first R shape Applying step, second R-shape applying step HL Flat bar or pipe half-part length Ir, Ip Tip second moment of area, Cylindrical second moment
すなわち本発明は、例えば、以下の構成・特徴を備えるものである。
（態様１）
長尺パイプ体を用意する材料用意工程と、
前記パイプ体の中央部を扁平化する潰し成形を施す中央部潰し工程と、
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ工程と、
前記パイプ体の一方の先端部を扁平化する潰し成形を施す第１端潰し工程と、
前記パイプ体の他方の先端部を扁平化する潰し成形を施す第２端潰し工程と、
を含むこと
を特徴とする物体挟持用トングの製造方法。
（態様２）
前記中央部潰し工程は、前記中央部に近接した前記パイプ体の基端部も押圧変形してグリップ部を付与すること
を特徴とする態様１に記載の物体挟持用トングの製造方法。
（態様３）
前記一方の先端部に対しバリ取り又は／及び波形状を付与する第１先端部調節工程と、
前記他方の先端部に対しバリ取り又は／及び波形状を付与する第２先端部調節工程と、
をさらに含むこと
を特徴とする態様１又は２に記載の物体挟持用トングの製造方法。
（態様４）
前記一方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与する第１Ｒ形状付与工程と、
前記他方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与する第２Ｒ形状付与工程と、
をさらに含むこと
を特徴とする態様１〜３のいずれかに記載の物体挟持用トングの製造方法。
（態様５）
前記材料用意工程で、アルミニウム製又はチタン製の長尺パイプ体を用意すること
を特徴とする態様１〜４のいずれかに記載の物体挟持用トングの製造方法。
（態様６）
長尺パイプ体の中央部を扁平化する潰し成形を施す中央部潰し手段と、
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ手段と、
前記パイプ体の一方又は他方の先端部を扁平化する潰し成形を施す先端部潰し手段と、
を備えること
を特徴とする物体挟持用トングの製造装置。
（態様７）
前記先端部潰し手段は、前記一方の先端部と、前記他方の先端部と、を水平に保持する水平度保持手段と、をさらに備えること
を特徴とする態様６に記載の物体挟持用トングの製造装置。
（態様８）
前記一方又は他方の先端部に対しバリ取り又は／及び波形状を付与する先端部調節手段をさらに備えること
を特徴とする態様６又は７に記載の物体挟持用トングの製造装置。
（態様９）
前記一方又は他方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与するＲ形状付与手段をさらに備えること
を特徴とする態様６〜８のいずれかに記載の物体挟持用トングの製造装置。
（態様１０）
一対の先端部と、Ｕ字部と、前記先端部と前記Ｕ字部とを連結する胴体と、を備え、
かつ、
前記先端部と前記胴体と前記Ｕ字部とは全て一本の連続した長尺パイプ体から構成され、
前記先端部と前記Ｕ字部とは扁平に潰れた形状を成し、
前記Ｕ字部は、前記長尺パイプ体の中央部に位置し、
前記長尺パイプ体の材質は、アルミニウム又はチタンであること
を特徴とする物体挟持用トング。
That is, the present invention has the following configurations and features, for example.
(Aspect 1)
A material preparation process for preparing a long pipe body,
A central portion crushing step of subjecting the central portion of the pipe body to flattening,
A U-shaped bending step of bending the pipe body in a U-shape with the central portion as a base point;
A first end crushing step of performing crush molding for flattening one end of the pipe body;
A second end crushing step of performing crush molding for flattening the other end of the pipe body;
A method of manufacturing a tongs for holding an object, comprising:
(Aspect 2)
The method for manufacturing an object-holding tongue according to Aspect 1, wherein in the central portion crushing step, the base end portion of the pipe body near the central portion is also deformed by pressing to provide a grip portion.
(Aspect 3)
A first tip adjusting step of deburring or/and imparting a wavy shape to the one tip;
A second tip adjusting step of deburring or/and imparting a wavy shape to the other tip;
The method for manufacturing an object-holding tongue according to Aspect 1 or 2, further comprising:
(Aspect 4)
A first R shape imparting step of imparting an inner R shape to the far end portion of the pipe body that is close to the one tip portion;
A second R shape imparting step of imparting an inner R shape to the far end portion of the pipe body which is close to the other tip portion;
The method for manufacturing an object-holding tongue according to any one of aspects 1 to 3, further comprising:
(Aspect 5)
In the material preparing step, a long pipe body made of aluminum or titanium is prepared, and the method for manufacturing the tongs for holding an object according to any one of aspects 1 to 4, characterized in that.
(Aspect 6)
A central portion crushing means for subjecting the central portion of the long pipe body to flattening,
U-shaped bending means for bending the pipe body in a U-shape with the central portion as a base point,
A tip crushing means for crushing and shaping one or the other tip of the pipe body;
An apparatus for manufacturing a tongs for holding an object, comprising:
(Aspect 7)
7. The object sandwiching tongue according to Aspect 6, wherein the tip portion crushing means further includes a levelness holding means for horizontally holding the one tip portion and the other tip portion. manufacturing device.
(Aspect 8)
8. The apparatus for manufacturing an object-holding tongue according to aspect 6 or 7, further comprising a tip portion adjusting means for deburring or/and imparting a wavy shape to the one or the other tip portion.
(Aspect 9)
The object-holding tong according to any one of aspects 6 to 8, further comprising an R-shape imparting means for imparting an inner R-shape to the far end of the pipe body that is adjacent to the one or the other tip. Manufacturing equipment.
(Aspect 10)
A pair of tip portions, a U-shaped portion, and a body connecting the tip portion and the U-shaped portion,
And,
The tip portion, the body, and the U-shaped portion are all composed of one continuous long pipe body,
The tip portion and the U-shaped portion have a flattened shape,
The U-shaped portion is located at the center of the long pipe body,
The material for the long pipe body is aluminum or titanium.
Claims (10)
前記パイプ体の中央部を扁平化する潰し成形を施す中央部潰し工程と、
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ工程と、
前記パイプ体の一方の先端部を扁平化する潰し成形を施す第１端潰し工程と、
前記パイプ体の他方の先端部を扁平化する潰し成形を施す第２端潰し工程と、
を含むこと
を特徴とする物体挟持用トングの製造方法。 A material preparation process for preparing long pipes,
A central portion crushing step of subjecting the central portion of the pipe body to flattening,
A U-shaped bending step of bending the pipe body in a U-shape with the central portion as a base point;
A first end crushing step of performing crush molding for flattening one end of the pipe body;
A second end crushing step of performing crush molding for flattening the other end of the pipe body;
A method of manufacturing a tongs for holding an object, comprising:
を特徴とする請求項１に記載の物体挟持用トングの製造方法。 The method for manufacturing an object-holding tongue according to claim 1, wherein, in the central portion crushing step, the base end portion of the pipe body close to the central portion is also deformed by pressing to provide a grip portion.
前記他方の先端部に対しバリ取り又は／及び波形状を付与する第２先端部調節工程と、
をさらに含むこと
を特徴とする請求項１又は２に記載の物体挟持用トングの製造方法。 A first tip adjusting step of deburring or/and imparting a wavy shape to the one tip;
A second tip adjusting step of deburring or/and imparting a wavy shape to the other tip;
The method for manufacturing an object-holding tongue according to claim 1 or 2, further comprising:
前記他方の先端部に近接した前記パイプ体の遠端部に内側Ｒ形状を付与する第２Ｒ形状付与工程と、
をさらに含むこと
を特徴とする請求項１〜３のいずれかに記載の物体挟持用トングの製造方法。 A first R shape imparting step of imparting an inner R shape to the far end portion of the pipe body that is close to the one tip portion;
A second R shape imparting step of imparting an inner R shape to the far end portion of the pipe body which is close to the other tip portion;
The method for manufacturing an object holding tongue according to any one of claims 1 to 3, further comprising:
を特徴とする請求項１〜４のいずれかに記載の物体挟持用トングの製造方法。 The method for manufacturing an object-holding tongue according to claim 1, wherein a long pipe body made of aluminum or titanium is prepared in the material preparing step.
前記中央部を基点に前記パイプ体をＵ字状に折り曲げるＵ字折り曲げ手段と、
前記パイプ体の一方又は他方の先端部を扁平化する潰し成形を施す先端部潰し手段と、
を備えること
を特徴とする物体挟持用トングの製造装置。 A central portion crushing means for subjecting the central portion of the long pipe body to flattening,
U-shaped bending means for bending the pipe body in a U-shape with the central portion as a base point,
A tip crushing means for crushing and shaping one or the other tip of the pipe body;
An apparatus for manufacturing a tongs for holding an object, comprising:
を特徴とする請求項６に記載の物体挟持用トングの製造装置。 The tongue for pinching an object according to claim 6, wherein the tip end crushing means further includes a horizontality holding means for horizontally holding the one tip end and the other tip end. Manufacturing equipment.
を特徴とする請求項６又は７に記載の物体挟持用トングの製造装置。 The device for manufacturing an object-holding tongue according to claim 6 or 7, further comprising a tip portion adjusting means for deburring or/and corrugating the one or the other tip portion.
を特徴とする請求項６〜８のいずれかに記載の物体挟持用トングの製造装置。 9. The object-holding object according to any one of claims 6 to 8, further comprising an R-shape imparting means for imparting an inner R-shape to the far end of the pipe body which is adjacent to the one or the other tip. Tong manufacturing equipment.
かつ、
前記先端部と前記胴体と前記Ｕ字部とは全て一本の連続した長尺パイプ体から構成され、
前記先端部と前記Ｕ字部とは扁平に潰れた形状を成し、
前記長尺パイプ体の材質は、アルミニウム又はチタンであること
を特徴とする物体挟持用トング。 A pair of tip portions, a U-shaped portion, and a body connecting the tip portion and the U-shaped portion,
And,
The tip portion, the body, and the U-shaped portion are all composed of one continuous long pipe body,
The tip portion and the U-shaped portion have a flattened shape,
The material for the long pipe body is aluminum or titanium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019017897A JP6531930B1 (en) | 2019-02-04 | 2019-02-04 | Object holding tongue, method for manufacturing the same, and manufacturing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019017897A JP6531930B1 (en) | 2019-02-04 | 2019-02-04 | Object holding tongue, method for manufacturing the same, and manufacturing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP6531930B1 JP6531930B1 (en) | 2019-06-19 |
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