JP3266528B2 - Bending method at both ends of coil spring - Google Patents
Bending method at both ends of coil springInfo
- Publication number
- JP3266528B2 JP3266528B2 JP33494696A JP33494696A JP3266528B2 JP 3266528 B2 JP3266528 B2 JP 3266528B2 JP 33494696 A JP33494696 A JP 33494696A JP 33494696 A JP33494696 A JP 33494696A JP 3266528 B2 JP3266528 B2 JP 3266528B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- coil spring
- tool
- pressing
- bending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コイルばねの両端
内曲げ方法に係るものであって、さらに詳しくは、コイ
ルばね製造機によって成形されるコイルばねの始端部を
反成形方向内側に折り曲げ成形するとともに、終端部を
成形方向内側に折り曲げ成形して、両端をコイルばね軸
方向のそれぞれ内側に曲げる方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bending both ends of a coil spring, and more particularly, to bending a starting end of a coil spring formed by a coil spring manufacturing machine inward in a non-forming direction. The present invention also relates to a method of bending an end portion inward in the forming direction and bending both ends inward in the axial direction of the coil spring.
【０００２】[0002]
【従来の技術】従来の技術では、例えば、特開昭６１−
２２６１３０号公報に記載された技術（以下、従来技術
Ａという）、および、特開昭６２−１１４７３８号公報
に記載された技術（以下、従来技術Ｂという）が開示さ
れている。2. Description of the Related Art In the prior art, for example,
A technique described in Japanese Patent Application Laid-Open No. 226130 (hereinafter referred to as Conventional Technology A) and a technology described in Japanese Patent Application Laid-Open No. Sho 62-114938 (hereinafter referred to as Conventional Technology B) are disclosed.
【０００３】一方の従来技術Ａに開示された発明の目的
は、同公報に記載されたとおり、線材に対して、ピッチ
方向一側方向のみならず、ピッチ方向他方向にも押圧力
を作用させられるようにして、前記線材にピッチ方向の
両方向に自由にピッチがつけられるようにすることによ
り、例えば同公報の第５図に示すような、両端部が平坦
なコイルばねを製作することである。On the other hand, the object of the invention disclosed in the prior art A is to apply a pressing force to a wire not only in one direction in the pitch direction but also in the other direction in the pitch direction, as described in the publication. By making the wire rod freely pitchable in both directions of the pitch direction, a coil spring having both ends flat as shown in FIG. 5 of the publication can be manufactured. .
【０００４】また、その構成は、曲げダイス（２）と、
この曲げダイス（２）に線材（Ａ）を送り出す送り手段
（１）とを備えたコイリングマシンにおいて、曲げダイ
ス（２）の線材送出し方向前方側に、線材（Ａ）をその
ピッチ方向一方向に押圧する第１押圧手段（４ａ）と、
他方向に押圧する第２押圧手段（４ｂ）と、これら各押
圧手段（４ａ，４ｂ）をピッチ方向に移動する移動手段
（５）とを設けたものである。[0004] In addition, the structure is a bending die (2),
In a coiling machine provided with a feeding means (1) for feeding the wire (A) to the bending die (2), the wire (A) is moved in one direction in the pitch direction in front of the bending die (2) in the wire feeding direction. A first pressing means (4a) for pressing against
A second pressing means (4b) for pressing in the other direction and a moving means (5) for moving each of these pressing means (4a, 4b) in the pitch direction are provided.
【０００５】そして、その作用は、曲げダイス（２）で
形成される線材（Ａ）の巻成初期に、線材（Ａ）のピッ
チをゼロピッチにするとともに、線材（Ａ）が一巻き弱
巻成されたときに、第１押圧手段（４ａ）により線材
（Ａ）を、コイルばねのピッチ方向一方向（イ）に対す
る他方向（ロ）に引き戻して、第１屈曲部を形成し、そ
の後所定長さ線材（Ａ）を送り出したのち、第２押圧手
段（４ｂ）により線材（Ａ）をピッチ方向一方向（イ）
に押し出して第２屈曲部を形成して、線材（Ａ）に所定
にピッチを付けるとともに、線材（Ａ）の巻成最終段階
時にも同様にして、第３屈曲部を形成し、その後、第４
屈曲部を形成して線材（Ａ）のピッチをゼロに設定する
ものである。[0005] The effect of this is that the pitch of the wire (A) is reduced to zero pitch at the initial winding of the wire (A) formed by the bending die (2), and the wire (A) is wound slightly less than one turn. Then, the wire rod (A) is pulled back by the first pressing means (4a) in the other direction (b) with respect to one direction (b) in the pitch direction of the coil spring to form a first bent portion, and thereafter a predetermined length is formed. After sending out the wire (A), the wire (A) is moved in one direction in the pitch direction (A) by the second pressing means (4b).
To form a second bent portion, a predetermined pitch is formed on the wire (A), and a third bent portion is formed in the same manner at the final stage of winding the wire (A). 4
A bent portion is formed to set the pitch of the wire (A) to zero.
【０００６】他方の従来技術Ｂに開示された発明は従来
技術Ａの改良発明であって、その目的は同公報に記載さ
れたとおり、線材に対して、初張力を付与し、ピッチツ
ールで一方向のみに段階的に押圧することによって、例
えば同公報の第７図に示すような、両端部が平坦なコイ
ルばねを製作することである。[0006] On the other hand, the invention disclosed in the prior art B is an improved invention of the prior art A. The purpose of the invention is to apply an initial tension to a wire rod and to use a pitch tool as described in the publication. By stepwise pressing only in the direction, a coil spring having both ends flat as shown in, for example, FIG. 7 of the publication is produced.
【０００７】また、その構成は、曲げダイス（２０）
と、この曲げダイス（２０）にガイド部材（３０）を介
して線材（Ａ）を送り出す手段と、線材切断用の芯金
（６０）ととを備えたコイリングマシンにおいて、ガイ
ド部材（３０）における線材出口（３１）位置に対し、
曲げダイス（２０）の偏向面における線材当り位置を、
線材（Ａ）により形成するコイルばね（８）の初張力付
与方向にずらせて設置するとともに、曲げダイス（２
０）の線材送り出し方向前方側に、線材（Ａ）を初張力
付与方向とは反対方向に押圧するピッチツール（４０）
を、線材（Ａ）に対し初張力付与方向に退出可能に設け
たものである。[0007] The bending die (20)
And a means for feeding the wire (A) to the bending die (20) via the guide member (30), and a core bar (60) for cutting the wire, wherein the guide member (30) For the wire exit (31) position,
The contact position of the bending die (20) on the deflection surface of the wire is
The coil spring (8) formed by the wire (A) is set so as to be shifted in the initial tension applying direction, and the bending dies (2
A pitch tool (40) for pressing the wire (A) in a direction opposite to the initial tension applying direction in front of the wire feeding direction of 0).
Are provided so as to be able to retreat in the initial tension application direction with respect to the wire (A).
【０００８】そして、その作用は、ガイド部材（３０）
の線材出口（３１）より出された線材（Ａ）を、曲げダ
イス（２０）の偏向面における線材当り位置でずらせて
初張力を付与し、この状態でピッチツール（４０）によ
って、線材（Ａ）を一巻き弱巻成して平坦部を形成し、
次に、ピッチツール（４０）を急激に前方方向に突出さ
せて線材を大きく押圧して、第１屈曲部を形成し、その
後所定長さ線材（Ａ）を送り出したのち、ピッチツール
（４０）を急激に退行させて第２屈曲部を形成して、さ
らに、ピッチツール（４０）を前方に突出させて線材
（Ａ）を送り出し粗状巻成部を形成するとともに、線材
（Ａ）の巻成最終段階時にも同様にして、第３屈曲部を
形成し、その後、第４屈曲部を形成して、最後にピッチ
ツール（４０）をわずかに突出させて平坦部を形成する
ものである。The operation of the guide member (30)
The wire (A) discharged from the wire rod outlet (31) is shifted at the position of the wire rod on the deflection surface of the bending die (20) to give initial tension, and in this state, the wire (A) is moved by the pitch tool (40). ) Is wound slightly less to form a flat part,
Next, the pitch tool (40) is suddenly protruded in the forward direction to greatly press the wire to form a first bent portion, and after sending out the wire (A) of a predetermined length, the pitch tool (40) Is rapidly retracted to form a second bent portion, and furthermore, the pitch tool (40) is protruded forward to send out the wire (A) to form a coarse wound portion, and to wind the wire (A). Similarly, at the final stage of formation, the third bent portion is formed, then the fourth bent portion is formed, and finally the pitch tool (40) is slightly projected to form a flat portion.
【０００９】[0009]
【発明が解決しようとする課題】コイルばねは、コイル
ばね軸方向の両端面に形成されたばね座が２個の構成部
材のばね受け面にそれぞれ当接して２個の構成部材を付
勢するものであるが、コイルばね線材の始端と終端とに
は、コイル軸心と直角なばね座に膨出する鋭角な角部を
有し（線材切断によるバリが残存していると、鋭角な角
部の膨出量はさらに大きくなる）、この鋭角な角部は、
コイルばねの伸縮運動によって２個の構成部材のばね受
け面内で、それぞれコイルばねの押圧力を付勢されなが
ら移動を繰り返す。In a coil spring, spring seats formed on both end faces in the axial direction of the coil spring abut against the spring receiving surfaces of the two components, respectively, to bias the two components. However, the beginning and end of the coil spring wire have sharp corners that bulge into a spring seat perpendicular to the coil axis. The bulge amount becomes even larger).
The movement is repeated while the pressing force of the coil spring is applied within the spring receiving surfaces of the two components by the expansion and contraction movement of the coil spring.
【００１０】このために、少なくとも一方の構成部材が
例えば、樹脂成形品や軟質金属などである場合には、前
述したばね座に膨出する鋭角な角部によって、その構成
部材のばね受け面に疵が生じるばかりではなく、コイル
ばねの繰り返し伸縮運動でその構成部材のばね受け面が
削り取られるという不都合な問題があった。[0010] For this reason, when at least one of the constituent members is, for example, a resin molded product or a soft metal, the above-mentioned sharp corner swelling on the spring seat causes the spring receiving surface of the constituent member to be attached. In addition to the occurrence of flaws, there has been an inconvenience that the spring receiving surface of the component member is scraped off due to the repeated expansion and contraction of the coil spring.
【００１１】上述した、コイルばねのばね座に膨出する
鋭角な角部によって、構成部材のばね受け面が削り取ら
れるという問題を解決するためには、構成部材のばね受
け面とコイルばねのばね座との間に、例えば硬質金属の
座金を装入するか、または、コイルばねの両端を研削す
ることが思考できるが、前者の硬質金属の座金を装入す
る手段は、構成部品点数が増加するとともに、組付けが
煩雑になり、また、後者の両端を研削する手段は、その
研削角部によって構成部材のばね受け面が削り取られ易
い問題があった。In order to solve the above-mentioned problem that the spring receiving surface of the component is shaved off by the sharp corner bulging out of the spring seat of the coil spring, the spring receiving surface of the component and the spring of the coil spring are required. It is conceivable to insert a hard metal washer, for example, or grind both ends of a coil spring between the seat and the seat.However, the former means of inserting the hard metal washer increases the number of components. In addition, assembling becomes complicated, and the latter means for grinding both ends has a problem that the spring receiving surface of the component member is easily scraped off by the grinding angle portion.
【００１２】従って、コイルばね線材の始端と終端との
角部によって、構成部材のばね受け面が削り取られない
ようにするためには、コイルばね線材の始端と終端とを
コイルばね軸方向の内側に折り曲げることが最善の手段
である。Therefore, in order to prevent the spring receiving surface of the component from being cut off by the corner between the start end and the end of the coil spring wire, the start end and the end of the coil spring wire must be positioned inside the axial direction of the coil spring. Folding is the best option.
【００１３】ところが、上述した従来技術Ａに開示され
た発明では、線材（Ａ）の巻成初期に線材（Ａ）のピッ
チをゼロピッチにするとともに、線材（Ａ）が一巻き弱
巻成されたときに、線材（Ａ）をコイルばねのピッチ方
向一方向（イ）に対する他方向（ロ）に引き戻して、第
１屈曲部を形成し、その後所定長さ線材（Ａ）を送り出
したのち、線材（Ａ）をピッチ方向一方向（イ）に押し
出して第２屈曲部を形成して、線材（Ａ）に所定にピッ
チを付けるとともに、線材（Ａ）の巻成最終段階時にも
同様にして、第３屈曲部を形成し、その後、第４屈曲部
を形成して線材（Ａ）のピッチをゼロに設定するもので
あるから、コイルばねの両端に形成するピッチをゼロに
することは可能であっても、本発明の図１５に示すよう
に、コイルばね線材の始端と終端とをコイルばね軸方向
の内側に折り曲げることはできない問題があった。However, in the invention disclosed in the above-mentioned prior art A, the pitch of the wire (A) is set to zero pitch at the initial stage of winding the wire (A), and the wire (A) is wound slightly less than one turn. In some cases, the wire (A) is pulled back in the other direction (b) with respect to one direction (b) in the pitch direction of the coil spring to form the first bent portion, and thereafter, the wire (A) having a predetermined length is sent out. (A) is extruded in one direction (a) in the pitch direction to form a second bent portion, a predetermined pitch is given to the wire (A), and the same applies at the final stage of winding the wire (A). Since the pitch of the wire (A) is set to zero by forming the third bent portion and then forming the fourth bent portion, it is possible to set the pitch formed at both ends of the coil spring to zero. Even if there is a coil spring wire as shown in FIG. Had a start and end and the problem can not be folded inside the coil spring axis.
【００１４】また、従来技術Ｂに開示された発明では、
線材（Ａ）を曲げダイス（２０）の偏向面における線材
当り位置でずらせて初張力を付与し、この状態で線材
（Ａ）を一巻き弱巻成して平坦部を形成し、次に、ピッ
チツール（４０）を急激に前方方向に突出させて線材を
大きく押圧して第１屈曲部を形成し、その後所定長さ線
材（Ａ）を送り出したのち、ピッチツール（４０）を急
激に退行させて第２屈曲部を形成して、さらに、ピッチ
ツール（４０）を前方に突出させて線材（Ａ）を送り出
し粗状巻成部を形成するとともに、線材（Ａ）の巻成最
終段階時にも同様にして、第３屈曲部を形成し、その
後、第４屈曲部を形成して、最後にピッチツール（４
０）をわずかに突出させて平坦部を形成するものである
から、コイルばねの両端に平坦部を形成することは可能
であっても、本発明の図１５に示すように、コイルばね
線材の始端と終端とをコイルばね軸方向の内側に折り曲
げることはできない問題があった。In the invention disclosed in the prior art B,
The wire (A) is shifted at the position of contact with the wire on the deflection surface of the bending die (20) to apply initial tension, and in this state, the wire (A) is slightly wound by one turn to form a flat portion. The pitch tool (40) is suddenly protruded in the forward direction to greatly press the wire to form the first bent portion, and after the wire (A) having a predetermined length is sent out, the pitch tool (40) is suddenly retreated. The second bent portion is formed, and the pitch tool (40) is further protruded forward to feed out the wire (A) to form a coarse wound portion, and at the final stage of winding the wire (A). Similarly, a third bent portion is formed, then a fourth bent portion is formed, and finally, the pitch tool (4) is formed.
0) is slightly protruded to form a flat portion, so that it is possible to form flat portions at both ends of the coil spring, but as shown in FIG. There is a problem that the start end and the end cannot be bent inward in the axial direction of the coil spring.
【００１５】本発明は、上述のような問題点に鑑みてな
されたものであって、その目的とするところは、コイル
ばねの始端部を反成形方向内側に折り曲げ成形するとと
もに、終端部を成形方向内側に折り曲げ成形し、コイル
ばねの始端と終端との両端をコイルばね軸方向のそれぞ
れ内側に曲げて、鋭角な角部がばね座に膨出することな
く、コイルばねの繰り返し伸縮運動でその構成部材のば
ね受け面が削り取られないコイルばねを容易に成形でき
る、コイルばねの両端内曲げ方法を提供しようとするも
のである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to bend and form a starting end of a coil spring in a direction opposite to a forming direction and form an end of the coil spring. The coil spring is bent inward, and both ends of the starting end and the end of the coil spring are bent inward in the axial direction of the coil spring. It is an object of the present invention to provide a method of bending both ends of a coil spring, which can easily form a coil spring in which a spring receiving surface of a constituent member is not removed.
【００１６】[0016]
【課題を解決するための手段】上述の目的を達成するた
めに、本発明のコイルばねの両端内曲げ方法は、巻回さ
れた線材の始端近傍を線材抑止手段によってコイルばね
成形方向と逆方向に抑止して、この抑止された部分と始
端との間の線材を始端曲げ手段によってコイルばね成形
方向と逆方向に押圧して始端部をコイルばね軸方向内側
に折り曲げ成形し、引き続き線材を巻回工具に衝合させ
て所定巻回数のコイルばねに成形した後、巻回された線
材の終端近傍を前記線材抑止手段によってコイルばね成
形方向に抑止して、この抑止された部分よりも始端側の
近傍の線材を終端曲げ手段によってコイルばね成形方向
に押圧して終端部をコイルばね軸方向内側に折り曲げ成
形し、コイルばねの始端と終端との両端をコイルばね軸
方向のそれぞれ内側に曲げるようにした方法である。In order to achieve the above-mentioned object, a method for bending the inside of both ends of a coil spring according to the present invention is provided. The wire between the restrained portion and the starting end is pressed in the direction opposite to the coil spring forming direction by the starting end bending means, and the starting end is bent inward in the axial direction of the coil spring, and subsequently the wire is wound. After being formed into a coil spring having a predetermined number of turns by abutment with a turning tool, the vicinity of the end of the wound wire is suppressed in the coil spring forming direction by the wire rod suppressing means, and the starting end side of the suppressed portion is Is pressed in the coil spring forming direction by the terminal bending means to bend the terminal portion inward in the coil spring axial direction, and the both ends of the starting end and the terminal end of the coil spring in the coil spring axial direction are respectively formed. It is a method that was to bend to.
【００１７】また、線材抑止手段は、巻回された線材を
挟入可能にコイル軸心に向かって進退可能な先端部に凹
溝が形成され、前記先端部がコイル軸心に向かって進出
して線材の始端近傍または終端近傍が前記凹溝に挟入さ
れた状態において、前記凹溝の一方の内側面で線材をコ
イルばね成形方向と逆方向に抑止するとともに、他方の
内側面で線材をコイルばね成形方向に抑止する線材挟入
工具を用いるようにした方法である。In the wire rod restraining means, a concave groove is formed at a front end portion of the wire rod that can advance and retreat toward the coil axis so that the wound wire can be inserted therebetween, and the front end portion extends toward the coil axis. In the state where the vicinity of the starting end or the end of the wire is sandwiched in the groove, the wire is restrained in the direction opposite to the coil spring forming direction on one inner surface of the groove, and the wire is restrained on the other inner surface. This is a method in which a wire pinching tool that suppresses in the coil spring forming direction is used.
【００１８】また、始端曲げ手段は、巻回された線材の
始端部前面にのみ当接可能にコイルばね成形方向と逆方
向に進退可能な先端部に押圧面が形成され、前記押圧面
がコイルばね成形方向と逆方向に進出して線材の始端部
前面に当接し、さらに前記押圧面が同方向に進出した状
態において、前記押圧面で線材の始端部をコイルばね成
形方向と逆方向に押圧する始端押圧工具を用いるように
した方法である。Further, the starting end bending means has a pressing surface formed at a front end portion which can advance and retreat in a direction opposite to the coil spring forming direction so as to be able to contact only the front surface of the starting end portion of the wound wire, and the pressing surface is formed by a coil. In a state in which the wire advances in the direction opposite to the spring forming direction and abuts on the front surface of the starting end of the wire, and furthermore, in a state where the pressing surface advances in the same direction, the pressing surface presses the starting end of the wire in the direction opposite to the coil spring forming direction. This is a method in which a starting end pressing tool is used.
【００１９】また、一方の終端曲げ手段は、巻回された
線材の終端部後面にのみ当接可能にコイル軸心に向かっ
て進退可能な先端部に傾斜面が形成され、前記先端部が
コイル軸心に向かって進出して線材の終端部後面に当接
し、さらに前記先端部が同方向に向かって進出した状態
において、前記先端部の傾斜面で線材の終端部をコイル
ばね成形方向に押圧する楔形ピッチ工具を用いるように
した方法である。The one end bending means has an inclined surface formed at a front end portion which can advance and retreat toward the coil axis so as to be able to abut only on the rear surface of the end portion of the wound wire. When the wire advances toward the axis and abuts against the rear surface of the end of the wire, and the tip advances further in the same direction, the end of the wire is pressed in the coil spring forming direction by the inclined surface of the tip. This is a method in which a wedge-shaped pitch tool is used.
【００２０】さらに、他方の終端曲げ手段は、巻回され
た線材の終端部後面にのみ当接可能にコイルばね成形方
向に進退可能な先端部に押圧面が形成され、前記押圧面
がコイルばね成形方向に進出して線材の終端部後面に当
接し、さらに前記押圧面が同方向に進出した状態におい
て、前記押圧面で線材の終端部をコイルばね成形方向に
押圧する押出しピッチ工具を用いるようにした方法であ
る。Further, the other end bending means has a pressing surface formed at a front end portion which can advance and retreat in the coil spring forming direction so as to be able to contact only the rear surface of the end portion of the wound wire material, and the pressing surface is formed by the coil spring. An extrusion pitch tool that presses the terminal end of the wire in the coil spring forming direction with the pressing surface while the pressing surface advances in the same direction while advancing in the forming direction and abutting against the rear surface of the end of the wire. This is the method that was used.
【００２１】本発明は上述のように、コイルばねの一方
の始端は、線材の始端近傍をコイルばね成形方向と逆方
向に抑止して、この抑止された部分と始端との間の線材
をコイルばね成形方向と逆方向に押圧して始端部をコイ
ルばね軸方向内側に折り曲げ成形し、また、他方の終端
は、線材の終端近傍をコイルばね成形方向に抑止して、
この抑止された部分よりも始端側の近傍の線材をコイル
ばね成形方向に押圧して終端部をコイルばね軸方向内側
に折り曲げ成形するようにしたので、コイルばねの始端
と終端との両端をコイルばね軸方向のそれぞれ内側に曲
げて、鋭角な角部がばね座に膨出することなく、コイル
ばねの繰り返し伸縮運動でその構成部材のばね受け面が
削り取られないコイルばねを容易に成形できる。As described above, according to the present invention, one starting end of the coil spring suppresses the vicinity of the starting end of the wire in the direction opposite to the coil spring forming direction, and the wire between the suppressed portion and the starting end is coiled. Pressing in the direction opposite to the spring forming direction to bend the start end inward in the axial direction of the coil spring, and the other end suppresses the vicinity of the end of the wire in the coil spring forming direction,
Since the wire nearer to the starting end than the suppressed portion is pressed in the coil spring forming direction and the terminal end is bent inward in the axial direction of the coil spring, both ends of the starting end and the end of the coil spring are coiled. The coil spring can be easily formed by bending inward in the direction of the spring axis so that the sharp corners do not bulge into the spring seat, and the spring receiving surface of the component member is not scraped off by the repeated expansion and contraction of the coil spring.
【００２２】また、線材抑止手段は、先端部に線材を挟
入可能な凹溝が形成され、この先端部がコイル軸心に向
かって進出して線材の始端近傍または終端近傍が前記凹
溝に挟入された状態において、前記凹溝の一方の内側面
で線材をコイルばね成形方向と逆方向に抑止するととも
に、他方の内側面で線材をコイルばね成形方向に抑止す
る線材挟入工具を用いるようにしたので、線材を確実に
抑止できるとともに、コイルばね成形方向の正逆両方向
に線材を抑止することができ構成が簡素にできる。In the wire rod suppressing means, a groove is formed at a tip end of the wire rod so that the wire rod can be inserted therebetween, and the tip end advances toward the coil axis so that the vicinity of the starting end or the end of the wire rod is formed in the groove. In the sandwiched state, a wire pinching tool is used that suppresses the wire in the direction opposite to the coil spring forming direction on one inner surface of the concave groove and suppresses the wire in the coil spring forming direction on the other inner surface. With this configuration, the wire can be reliably suppressed, and the wire can be suppressed in both the forward and reverse directions of the coil spring forming direction, so that the configuration can be simplified.
【００２３】また、始端曲げ手段は、線材の始端部前面
にのみ当接可能に先端部に押圧面が形成され、この押圧
面がコイルばね成形方向と逆方向に進出して線材の始端
部前面に当接し、さらに前記押圧面が同方向に進出した
状態において、前記押圧面で線材の始端部をコイルばね
成形方向と逆方向に押圧する始端押圧工具を用いるよう
にしたので、前述の線材抑止手段と協動して、始端部近
傍の線材を確実にコイルばね軸方向内側に折り曲げ成形
することができる。The starting end bending means has a pressing surface formed at the front end so as to be able to contact only the front end of the starting end of the wire, and this pressing surface is advanced in a direction opposite to the coil spring forming direction and the front end of the starting end of the wire is formed. , And in a state where the pressing surface has advanced in the same direction, a starting end pressing tool that presses the starting end of the wire rod in the direction opposite to the coil spring forming direction with the pressing surface is used. In cooperation with the means, the wire near the start end can be reliably bent inward in the axial direction of the coil spring.
【００２４】また、一方の終端曲げ手段は、線材の終端
部後面にのみ当接可能に先端部に傾斜面が形成され、こ
の先端部がコイル軸心に向かって進出して線材の終端部
後面に当接し、さらに前記先端部が同方向に向かって進
出した状態において、前記先端部の傾斜面で線材の終端
部をコイルばね成形方向に押圧する楔形ピッチ工具を用
いるようにしたので、前述の線材抑止手段と協動して、
終端部近傍の線材を確実にコイルばね軸方向内側に折り
曲げ成形することができるとともに、楔形ピッチ工具は
コイルばねのコイル胴部に所定のピッチも付与できるの
で構成が簡素にできる。The one end bending means has an inclined surface formed at the front end so as to be able to abut only on the rear surface of the end of the wire, and the front end advances toward the coil axis and the rear surface of the end of the wire. In the state where the distal end portion is further advanced in the same direction, a wedge-shaped pitch tool that presses the end portion of the wire in the coil spring forming direction on the inclined surface of the distal end portion is used. In cooperation with wire deterrence measures,
The wire rod in the vicinity of the end can be reliably bent inward in the axial direction of the coil spring, and the wedge-shaped pitch tool can provide a predetermined pitch to the coil body of the coil spring, so that the configuration can be simplified.
【００２５】さらに、前欄に記載した一方の終端曲げ手
段を用いない場合の別の手段である他方の終端曲げ手段
は、線材の終端部後面にのみ当接可能に先端部に押圧面
が形成され、この押圧面がコイルばね成形方向に進出し
て線材の終端部後面に当接し、さらに前記押圧面が同方
向に進出した状態において、前記押圧面で線材の終端部
をコイルばね成形方向に押圧する押出しピッチ工具を用
いるようにしたので、前述の線材抑止手段と協動して、
終端部近傍の線材を確実にコイルばね軸方向内側に折り
曲げ成形することができるとともに、押出しピッチ工具
はコイルばねのコイル胴部に所定のピッチも付与できる
ので構成が簡素にできる。Further, the other end bending means, which is another means in the case where the one end bending means described in the preceding column is not used, has a pressing surface formed at the front end such that it can abut only on the rear surface of the end of the wire. The pressing surface advances in the coil spring forming direction and abuts on the rear surface of the end of the wire, and further in the state where the pressing surface advances in the same direction, the pressing surface advances the terminal end of the wire in the coil spring forming direction. Since we used an extrusion pitch tool to press, in cooperation with the above-mentioned wire rod suppression means,
The wire rod in the vicinity of the end portion can be reliably bent and formed inward in the axial direction of the coil spring, and the extrusion pitch tool can impart a predetermined pitch to the coil body of the coil spring, so that the configuration can be simplified.
【００２６】[0026]
【発明の実施の形態】本発明の実施の形態を実施例にも
とづき、図面を参照して以下のとおり説明する。 図１
１乃至図１３は、本発明の第１実施例によってコイルば
ねの両端を内曲げ成形するための装置の説明図であっ
て、図１１はコイルばね製造機の主要部正面図、図１２
はその縦断面図、図１３は図１１に示す線材挟入工具１
３の先端部拡大図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG.
FIGS. 1 to 13 are explanatory views of an apparatus for inwardly bending both ends of a coil spring according to a first embodiment of the present invention. FIG. 11 is a front view of a main part of a coil spring manufacturing machine, and FIG.
Is a longitudinal sectional view thereof, and FIG. 13 is a wire rod inserting tool 1 shown in FIG.
FIG. 3 is an enlarged view of a distal end portion of FIG.
【００２７】コイルばね製造機の前方に前板４が立設さ
れ、この前板４の前面には、 線材Ｗを矢印方向へ送り
出す一対の送りローラ１，１と、 線材Ｗを挿通して前
方に案内する線ガイド２と、 この線ガイド２から繰り
出される線材Ｗを湾曲させて巻回する進退可能な巻回工
具３Ａ，３Ｂと、 巻回された線材Ｗにコイルばね成形
方向（図１１の手前側）にピッチを付与するコイル軸心
に向かって進退可能な楔形ピッチ工具３３と、 この楔
形ピッチ工具３３と対向する位置で巻回された線材Ｗの
終端を切断するコイル軸心に向かって進退可能な切断工
具５と、 この切断工具５に対向する位置の巻回された
線材Ｗの内側で切断工具５と協動して線材Ｗの終端を切
断する芯金６とが取着されている。A front plate 4 is erected in front of the coil spring manufacturing machine. A pair of feed rollers 1, 1 for feeding the wire W in the direction of the arrow is provided on the front surface of the front plate 4, and the wire W is inserted through the front. , A retractable winding tool 3A, 3B for curving and winding a wire W fed from the wire guide 2, a coil spring forming direction (see FIG. 11) for the wound wire W. A wedge-shaped pitch tool 33 capable of moving back and forth toward a coil axis for providing a pitch (on the front side); and a coil axis for cutting the end of the wire W wound at a position facing the wedge-shaped pitch tool 33. A cutting tool 5 that can move forward and backward, and a metal core 6 that cuts the end of the wire W in cooperation with the cutting tool 5 inside the wound wire W at a position facing the cutting tool 5 are attached. I have.
【００２８】また、コイルばねの両端を内曲げ成形する
ための第１実施例の構成要素として、切断工具５近傍の
線ガイド２側に、巻回された線材Ｗの始端近傍をコイル
ばね成形方向の逆方向に抑止するとともに、終端近傍を
コイルばね成形方向に抑止する線材抑止手段１０と、
この線材抑止手段１０近傍の線ガイド２側に、この線材
抑止手段１０によって抑止された始端近傍部分と始端と
の間の線材Ｗをコイルばね成形方向と逆方向に押圧して
始端部をコイルばね軸方向内側に折り曲げ成形する始端
曲げ手段２０と、 前記線材抑止手段１０によって終端
側が抑止された部分よりも始端側の近傍の線材Ｗをコイ
ルばね成形方向に押圧して終端部をコイルばね軸方向内
側に折り曲げ成形する終端曲げ手段３０とが前板４の前
面に設けられている。Further, as a component of the first embodiment for forming both ends of the coil spring inwardly, the vicinity of the starting end of the wound wire W is placed on the wire guide 2 side near the cutting tool 5 in the coil spring forming direction. Wire rod restraining means 10 for restraining the vicinity of the terminal end in the coil spring forming direction,
The wire W between the vicinity of the start end and the starting end, which is suppressed by the wire rod suppressing means 10, is pressed toward the wire guide 2 near the wire rod suppressing means 10 in the direction opposite to the coil spring forming direction, and the starting end is coiled. A starting end bending means 20 which bends and forms inward in the axial direction; and a wire W which is closer to the starting end side than the part whose end side is suppressed by the wire rod suppressing means 10 is pressed in the coil spring forming direction to move the terminal end in the coil spring axial direction. A terminal bending means 30 for bending and forming inward is provided on the front surface of the front plate 4.
【００２９】そして、線材抑止手段１０は、スライド体
１１が前記前板４の前面に取着され、このスライド体１
１に案内され図示しない駆動手段によって進退可能な工
具ホルダ１２に線材挟入工具１３が取着されている。
この線材挟入工具１３の先端部には図１３に示すよう
に、線材Ｗを挟入可能にＵ字状の凹溝１３ｕが形成さ
れ、前記先端部がコイル軸心に向かって進出して線材Ｗ
の始端近傍の始端抑止部Ｗｄ（図２参照）、または、終
端近傍の終端抑止部Ｗｙ（図５，図９参照）が先端部に
形成された凹溝１３ｕに挟入された状態において、凹溝
１３ｕの一方の内側面１３ａで線材Ｗをコイルばね成形
方向と逆方向に抑止するとともに、他方の内側面１３ｂ
で線材Ｗをコイルばね成形方向に抑止するように構成さ
れている。The wire rod restraining means 10 has a slide body 11 attached to the front surface of the front plate 4.
A wire rod insertion tool 13 is attached to a tool holder 12 which is guided by 1 and which can be advanced and retracted by driving means (not shown).
As shown in FIG. 13, a U-shaped concave groove 13u is formed at the distal end of the wire rod inserting tool 13 so as to be able to insert the wire W. W
In the state where the starting end suppressing portion Wd (see FIG. 2) near the starting end or the terminating suppressing portion Wy (see FIGS. 5 and 9) near the end is sandwiched by the concave groove 13u formed at the front end, The wire W is restrained in the direction opposite to the coil spring forming direction by one inner surface 13a of the groove 13u, and the other inner surface 13b
To suppress the wire W in the coil spring forming direction.
【００３０】また、始端曲げ手段２０は、工具取着台２
１が前板４の前面に立設され、この工具取着台２１に工
具取着軸２２が軸止され、この工具取着軸２２の端部に
中継ブロック２４が取着され、この中継ブロック２４に
中継軸２５が軸止され、この中継軸２５の他端にシリン
ダ取着台２６が取着され、このシリンダ取着台２６に立
設されたフランジ面にエアシリンダ２７が、進退自在な
ロッド２７ａの前端が巻回された線材Ｗの始端部前面に
向かう位置で取着され、そして、このエアシリンダ２７
のロッド２７ａの前端には始端押圧工具２３が取着され
ている。Further, the starting end bending means 20 includes the tool mounting table 2.
1 is erected on the front surface of the front plate 4, a tool mounting shaft 22 is fixed to the tool mounting base 21, and a relay block 24 is mounted to an end of the tool mounting shaft 22. The relay shaft 25 is fixed to the shaft 24, a cylinder mount 26 is mounted on the other end of the relay shaft 25, and an air cylinder 27 is movable on a flange surface erected on the cylinder mount 26. The front end of the rod 27a is attached at a position facing the front surface of the start end of the wound wire W.
A starting end pressing tool 23 is attached to the front end of the rod 27a.
【００３１】この始端押圧工具２３の先端部には、巻回
された線材Ｗの始端押圧部Ｗｂ（図２参照）の前面にの
み当接可能にコイルばね成形方向と逆方向に進退可能な
先端部に押圧面２３ａが形成され、この押圧面２３ａが
コイルばね成形方向と逆方向に進出して線材Ｗの始端押
圧部Ｗｂの前面に当接する。 さらに始端押圧工具２３
の押圧面２３ａが同方向に進出した状態において、押圧
面２３ａによって始端押圧部Ｗｂがコイルばね成形方向
と逆方向に押圧されて、後述する図３に示すように線材
Ｗを始端折曲部Ｗｃで折り曲げるように構成されてい
る。The leading end of the leading end pressing tool 23 has a leading end that can advance and retreat in the direction opposite to the coil spring forming direction so that it can contact only the front surface of the leading end pressing portion Wb (see FIG. 2) of the wound wire W. A pressing surface 23a is formed in the portion, and the pressing surface 23a advances in a direction opposite to the coil spring forming direction and abuts on the front surface of the starting end pressing portion Wb of the wire W. Further, the starting end pressing tool 23
When the pressing surface 23a has advanced in the same direction, the starting surface pressing portion Wb is pressed by the pressing surface 23a in the direction opposite to the coil spring forming direction, and the wire W is bent into the starting bent portion Wc as shown in FIG. It is configured to be bent at.
【００３２】また、終端曲げ手段３０は、スライド体３
１が前板４の前面に取着され、このスライド体３１に案
内され図示しない駆動手段によって進退可能な工具ホル
ダ３２に楔形ピッチ工具３３が取着されている。 この
楔形ピッチ工具３３の先端部には、巻回された線材Ｗの
終端部の後面側にのみ当接可能に傾斜面３３ａが形成さ
れ、この傾斜面３３ａがコイル軸心に向かって進出して
後述する図４に示す線材Ｗのピッチ付与部Ｗｐの後面側
に当接した状態において、傾斜面３３ａによってピッチ
付与部Ｗｐがコイルばね成形方向に押圧されてコイルば
ねＳに所定のピッチが付与される。 さらに傾斜面３３
ａが同方向に進出して後述する図６に示す終端押圧部Ｗ
ｗの後面側に当接した状態において、傾斜面３３ａの楔
作用によって終端押圧部Ｗｗがコイルばね成形方向に押
圧されて、線材Ｗを終端折曲部Ｗｘで折り曲げるように
構成されている。The terminal bending means 30 is provided for the slide body 3.
A wedge-shaped pitch tool 33 is mounted on a tool holder 32, which is mounted on the front surface of the front plate 4 and guided by the slide body 31 and can be advanced and retracted by driving means (not shown). At the tip of the wedge-shaped pitch tool 33, an inclined surface 33a is formed so as to be able to contact only the rear surface of the terminal end of the wound wire W, and the inclined surface 33a advances toward the coil axis. In a state where the wire W is in contact with the rear surface of the pitch applying portion Wp shown in FIG. 4 described later, the inclined surface 33a presses the pitch applying portion Wp in the coil spring forming direction, and a predetermined pitch is applied to the coil spring S. You. Furthermore, the inclined surface 33
a advances in the same direction, and the terminal end pressing portion W shown in FIG.
In a state in which the wire W is in contact with the rear surface side, the terminal pressing portion Ww is pressed in the coil spring forming direction by the wedge action of the inclined surface 33a, and the wire W is bent at the terminal bending portion Wx.
【００３３】次いで、本発明の第１実施例によってコイ
ルばねの両端を内曲げ成形する方法について、図１乃至
図７および図１５の説明図を参照して以下のとおり説明
する。Next, a method for bending both ends of the coil spring inward according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 7 and FIG.
【００３４】図１は加工前の待機位置を示し、 図２は
線材挟入工具１３が前進して線材Ｗの始端近傍が抑止さ
れた状態を示し、 図３は始端押圧工具２３が前進して
線材Ｗの始端部が折曲された状態を示し、 図４は楔形
ピッチ工具３３が前進して巻回される線材Ｗにピッチが
付与されコイルばねＳが成形された状態を示し、 図５
は線材挟入工具１３が前進して線材Ｗの終端近傍が抑止
された状態を示し、図６は楔形ピッチ工具３３が前進し
て線材Ｗの終端部が折曲された状態を示し、図７は切断
工具５が前進してコイルばね終端の線材Ｗが切断された
状態を示し、 図１５は両端が内曲げ成形されたコイル
ばねＳを示す説明図である。FIG. 1 shows a standby position before machining, FIG. 2 shows a state in which the wire rod insertion tool 13 has advanced and the vicinity of the starting end of the wire W has been suppressed, and FIG. FIG. 4 shows a state in which the starting end of the wire W is bent, and FIG. 4 shows a state in which a pitch is given to the wire W to be wound by the wedge-shaped pitch tool 33 being advanced and the coil spring S is formed.
7 shows a state in which the wire insertion tool 13 has advanced and the vicinity of the end of the wire W has been suppressed, and FIG. 6 shows a state in which the wedge-shaped pitch tool 33 has advanced and the end of the wire W has been bent. Shows a state in which the cutting tool 5 advances and the wire W at the terminal end of the coil spring is cut, and FIG. 15 is an explanatory view showing a coil spring S in which both ends are bent inward.
【００３５】まず、図１に示す切断工具５，線材挟入工
具１３，始端押圧工具２３および楔形ピッチ工具３３が
それぞれ後退端に後退して、次のコイルばねの成形加工
に備えて待機位置で待機している状態から、一対の送り
ローラ１，１（図１１参照）によって線材Ｗを送り出
し、線ガイド２から繰り出される所要長の線材Ｗを巻回
工具３Ａ，３Ｂに衝合させると線材Ｗが巻回され、線材
Ｗの先端部分に、芯金６から突出する図２に示すような
始端部が形成される。 この始端部が形成された後また
はその直前に、線材挟入工具１３をコイル軸心に向かっ
て前進させると、その先端部に形成された凹溝１３ｕ内
に線材Ｗの始端抑止部Ｗｄが挟入され、線材Ｗは、図２
（ｂ）に示すように凹溝１３ｕの一方の内側面１３ａに
よってコイルばね成形方向と逆方向（図示の左方）に抑
止される。First, the cutting tool 5, wire pinching tool 13, starting end pressing tool 23, and wedge-shaped pitch tool 33 shown in FIG. 1 are respectively retracted to the retracted ends, and are in the standby position in preparation for the next coil spring forming process. From the standby state, the wire W is sent out by the pair of feed rollers 1 and 1 (see FIG. 11), and the wire W of a required length fed from the wire guide 2 is brought into contact with the winding tools 3A and 3B. Is wound, and a starting end portion protruding from the cored bar 6 as shown in FIG. After or immediately before the start end is formed, when the wire rod insertion tool 13 is advanced toward the coil axis, the start end suppressing portion Wd of the wire W is inserted into the concave groove 13u formed at the distal end. And the wire W is
As shown in (b), the inner surface 13a of the groove 13u suppresses the coil spring in the direction opposite to the molding direction (to the left in the drawing).
【００３６】そして、始端押圧工具２３をコイルばね成
形方向と逆方向に前進させると押圧面２３ａが線材Ｗの
始端押圧部Ｗｂに当接し、さらに始端押圧工具２３を同
方向に前進させると、線材Ｗは、押圧面２３ａの押圧力
によってコイルばね成形方向と逆方向に押圧され、図３
に示すように、この押圧される始端押圧部Ｗｂと線材挟
入工具１３の凹溝１３ｕ内で抑止されている始端抑止部
Ｗｄとの間の始端折曲部Ｗｃを折曲位置にして、線材Ｗ
の始端部はコイルばね軸方向内側に折り曲げ成形され
る。 なお、上述した始端押圧工具２３は、図３に示す
前進端位置に到達すると略同時に後退させるとともに、
線材挟入工具１３は、始端押圧工具２３の押圧面２３ａ
が線材Ｗから脱離された後に後退させて、それぞれ図４
に示す後退端で待機させる。When the starting end pressing tool 23 is advanced in the direction opposite to the coil spring forming direction, the pressing surface 23a comes into contact with the starting end pressing portion Wb of the wire W, and when the starting end pressing tool 23 is further advanced in the same direction, the wire W is pressed in the direction opposite to the coil spring forming direction by the pressing force of the pressing surface 23a.
As shown in the figure, the starting wire bending portion Wc between the pressed starting wire pressing portion Wb and the starting wire restraining portion Wd restrained in the concave groove 13u of the wire rod insertion tool 13 is set to the bending position, W
Is bent inward in the axial direction of the coil spring. Note that the above-described starting end pressing tool 23 is retracted almost simultaneously with reaching the forward end position shown in FIG.
The wire pinching tool 13 is a pressing surface 23a of the starting end pressing tool 23.
Is retracted after the wire is detached from the wire W, as shown in FIG.
Wait at the retreat end shown in (1).
【００３７】次いで、楔形ピッチ工具３３をコイル軸心
に向かって所要位置まで前進させ、一対の送りローラ
１，１によって線材Ｗを送り出し、線ガイド２から繰り
出される線材Ｗを巻回工具３Ａ，３Ｂに衝合させると、
線材Ｗのピッチ付与部Ｗｐは、後面側が楔形ピッチ工具
３３の先端に形成された傾斜面３３ａと当接し、この傾
斜面３３ａによって線材Ｗのピッチ付与部Ｗｐは、図４
（ｂ）に示すようにコイルばね成形方向（図示の右方）
に付勢されて所要リードのピッチが付与され、線ガイド
２から所要長の線材Ｗを繰り出すことでコイルばねＳが
形成される。Next, the wedge-shaped pitch tool 33 is advanced to a required position toward the coil axis, the wire W is sent out by the pair of feed rollers 1, 1, and the wire W fed from the wire guide 2 is wound by the winding tools 3A, 3B. And
The rear surface of the pitch applying portion Wp of the wire W comes into contact with an inclined surface 33a formed at the tip of the wedge-shaped pitch tool 33, and the pitch imparting portion Wp of the wire W is formed by the inclined surface 33a in FIG.
As shown in (b), the coil spring forming direction (right side in the figure)
The coil spring S is formed by feeding a wire W of a required length from the wire guide 2.
【００３８】そして、コイルばねＳが形成され一対の送
りローラ１，１の回転を停止して、線ガイド２から繰り
出される線材Ｗを停止させるとともに、楔形ピッチ工具
３３を図５に示す位置まで後退させると、線材Ｗのピッ
チ付与部Ｗｐは、コイルばね成形方向に付勢されない状
態になる。Then, the coil spring S is formed and the rotation of the pair of feed rollers 1 and 1 is stopped to stop the wire W fed from the wire guide 2, and the wedge-shaped pitch tool 33 is retracted to the position shown in FIG. Then, the pitch applying portion Wp of the wire W is not urged in the coil spring forming direction.
【００３９】次いで、線ガイド２から繰り出される線材
Ｗを停止させた後またはその直前に線材挟入工具１３を
コイル軸心に向かって前進させると、その凹溝１３ｕ内
に線材Ｗの終端抑止部Ｗｙが挟入され、線材Ｗは、図５
（ｂ）に示すように凹溝１３ｕの他方の内側面１３ｂに
よってコイルばね成形方向（図示の右方）に抑止され
る。Next, after the wire rod W fed from the wire guide 2 is stopped or immediately before that, the wire rod insertion tool 13 is advanced toward the coil axis. Wy is inserted, and the wire W
As shown in (b), the other inner surface 13b of the concave groove 13u suppresses in the coil spring forming direction (right side in the drawing).
【００４０】そして、楔形ピッチ工具３３を図５に示す
位置からコイル軸心に向かって前進させると、線材Ｗの
終端部の後面側が楔形ピッチ工具３３の傾斜面３３ａと
当接し、さらに図６に示す前進端位置まで前進させる
と、線材Ｗの終端押圧部Ｗｗは、後面側が楔形ピッチ工
具３３に形成された傾斜面３３ａの楔作用によってコイ
ルばね成形方向に押圧され、この押圧される終端押圧部
Ｗｗと線材挟入工具１３の凹溝１３ｕで抑止されている
終端抑止部Ｗｙとの間の終端折曲部Ｗｘを折曲位置にし
て、図６に示すように、線材Ｗの終端部はコイルばね軸
方向内側に折り曲げ成形される。 なお、上述した楔形
ピッチ工具３３は、図６に示す前進端位置に到達すると
略同時に後退させるとともに、線材挟入工具１３は、楔
形ピッチ工具３３の傾斜面３３ａが線材Ｗから脱離され
た後に後退させて、それぞれ図７に示す後退端で待機さ
せる。When the wedge-shaped pitch tool 33 is advanced from the position shown in FIG. 5 toward the coil axis, the rear surface of the end portion of the wire W comes into contact with the inclined surface 33a of the wedge-shaped pitch tool 33, and FIG. When the wire rod W is advanced to the illustrated forward end position, the rear end pressing portion Ww of the wire W is pressed in the coil spring forming direction by the wedge action of the inclined surface 33a formed on the wedge-shaped pitch tool 33 on the rear surface side. The terminal bent portion Wx between Ww and the terminal restraining portion Wy restrained by the concave groove 13u of the wire pinching tool 13 is set at the bending position, and as shown in FIG. It is bent and formed inward in the spring axial direction. The above-described wedge-shaped pitch tool 33 is retracted almost simultaneously when it reaches the forward end position shown in FIG. 6, and the wire rod insertion tool 13 is moved after the inclined surface 33a of the wedge-shaped pitch tool 33 is detached from the wire W. It is retracted, and waits at the retreat end shown in FIG. 7, respectively.
【００４１】次いで、切断工具５をコイル軸心に向かっ
て前進させると、切断工具５の刃面５ａに形成された下
端部の切刃が巻回された線材Ｗの外周側に当接し、さら
に切断工具５を前進させると、線材Ｗは、切断工具５の
切刃と、芯金６の刃面６ａに形成され巻回された線材Ｗ
の内周側に当接する上端部の切刃との剪断作用によって
図７に示すように切断され、コイルばねＳは終端Ｗｚが
線材Ｗから切り離され、始端Ｗａと終端Ｗｚとの両端
が、図１５に示すようにコイルばね軸方向の内側に曲げ
られたコイルばねＳが巻成する。 そして、コイルばね
Ｓが線材Ｗから切り離された後、切断工具５を後退させ
て図１に示す後退端で待機させる。Next, when the cutting tool 5 is advanced toward the coil axis, the cutting blade at the lower end formed on the blade surface 5a of the cutting tool 5 comes into contact with the outer peripheral side of the wound wire W, and furthermore, When the cutting tool 5 is advanced, the wire W is formed by the cutting blade of the cutting tool 5 and the wound wire W formed on the blade surface 6 a of the metal core 6.
As shown in FIG. 7, the coil spring S is cut by the shearing action with the cutting edge at the upper end portion abutting on the inner peripheral side of the wire, the end Wz of the coil spring S is separated from the wire W, and both ends of the start end Wa and the end Wz are As shown in FIG. 15, a coil spring S bent inward in the axial direction of the coil spring is wound. Then, after the coil spring S is cut off from the wire W, the cutting tool 5 is retracted and made to stand by at a retracted end shown in FIG.
【００４２】上述した、第１実施例による線材Ｗの巻回
始めからコイルばねＳが巻成されるまでの１サイクルを
要約すると、 （１）図１に示す状態から線材Ｗを繰り
出して巻回工具３Ａ，３Ｂに衝合させると図２に示す始
端部が形成され、 （２）線材挟入工具１３で線材Ｗの
始端抑止部Ｗｄを抑止するとともに、始端押圧工具２３
で線材Ｗの始端押圧部Ｗｂを押圧すると、線材Ｗの始端
部は、図３に示すようにコイルばね軸方向内側に折り曲
げ成形され、 （３）楔形ピッチ工具３３で線材Ｗにピ
ッチを付与しながら線材Ｗを繰り出すと、図４に示すよ
うに所要長のコイルばねＳが形成され、 （４）図５に
示す線材挟入工具１３で線材Ｗの終端抑止部Ｗｙを抑止
するとともに、楔形ピッチ工具３３で線材Ｗの終端押圧
部Ｗｗを押圧すると、線材Ｗの終端部は、図６に示すよ
うにコイルばね軸方向内側に折り曲げ成形され、
（５）切断工具５と芯金６との剪断作用によって線材Ｗ
の終端Ｗｚが切断されると、図７に示すように両端がコ
イルばね軸方向の内側に曲げられたコイルばねＳが巻成
する。The following is a summary of one cycle from the start of winding the wire W according to the first embodiment to the winding of the coil spring S. (1) The wire W is fed out from the state shown in FIG. When the tools 3A and 3B are brought into contact with each other, the starting end shown in FIG. 2 is formed. (2) The starting end suppressing portion Wd of the wire W is suppressed by the wire inserting tool 13 and the starting pressing tool 23
When the start end pressing portion Wb of the wire W is pressed by the above, the start end of the wire W is bent and formed inward in the axial direction of the coil spring as shown in FIG. 3. (3) The pitch is given to the wire W by the wedge-shaped pitch tool 33. When the wire W is fed out, a coil spring S having a required length is formed as shown in FIG. 4. (4) The wire pinching tool 13 shown in FIG. When the end pressing portion Ww of the wire W is pressed by the tool 33, the end of the wire W is bent and formed inward in the axial direction of the coil spring as shown in FIG.
(5) The wire W is sheared by the cutting tool 5 and the cored bar 6.
Is cut, a coil spring S whose both ends are bent inward in the coil spring axial direction as shown in FIG. 7 is wound.
【００４３】引き続いて、本発明の第２実施例によって
コイルばねの両端を内曲げ成形するための装置につい
て、図１４を参照して以下のとおり説明する。 図１４
はコイルばね製造機の主要部正面図であって、この第２
実施例は、上述した第１実施例と終端曲げ手段３０のみ
が相違するものであるから、この終端曲げ手段３０を除
く他の構成要素は、第１実施例と同一の符号を付して第
１実施例と相違する部分について説明する。Next, an apparatus for inwardly bending both ends of a coil spring according to a second embodiment of the present invention will be described with reference to FIG. FIG.
Is a front view of a main part of the coil spring manufacturing machine,
The second embodiment differs from the first embodiment only in the terminal bending means 30. Therefore, the other components except for the terminal bending means 30 are denoted by the same reference numerals as those in the first embodiment. The parts different from the first embodiment will be described.
【００４４】第２実施例の終端曲げ手段３０は、コイル
ばね成形方向に進退可能なロッド３５が前板４の後面側
（図１２に示す右方）から前面側（図１２に示す左方）
に突出して前板４に挿通され、このロッド３５の前端部
に押出しピッチ工具３４が取着されている。 この押出
しピッチ工具３４の先端部には、巻回された線材Ｗの終
端部の後面側にのみ当接可能に押圧面３４ａが形成さ
れ、この押圧面３４ａがコイル軸心に向かって進出して
後述する図８に示すピッチ付与部Ｗｐの後面側に当接し
た状態において、押圧面３４ａによってピッチ付与部Ｗ
ｐがコイルばね成形方向に押圧されてコイルばねＳに所
定のピッチが付与される。In the terminal bending means 30 of the second embodiment, the rod 35, which can be advanced and retracted in the coil spring forming direction, is moved from the rear side (the right side in FIG. 12) of the front plate 4 to the front side (the left side in FIG. 12).
The rod 35 is inserted through the front plate 4, and an extruded pitch tool 34 is attached to the front end of the rod 35. A pressing surface 34a is formed at the tip of the extrusion pitch tool 34 so as to be able to abut only on the rear surface side of the terminal end of the wound wire W. The pressing surface 34a advances toward the coil axis. In a state in which it is in contact with the rear surface side of the pitch providing portion Wp shown in FIG.
p is pressed in the coil spring forming direction to give a predetermined pitch to the coil spring S.
【００４５】さらに押圧面３４ａが同方向に進出して後
述する図１０に示す終端押圧部Ｗｗ（前記ピッチ付与部
Ｗｐと近似位置）の後面側に当接した状態において、押
圧面３４ａによって終端押圧部Ｗｗがコイルばね成形方
向に押圧されて、線材Ｗを終端折曲部Ｗｘで折り曲げる
ように構成されている。Further, in a state where the pressing surface 34a advances in the same direction and abuts on the rear surface side of the terminal pressing portion Ww (position approximate to the pitch applying portion Wp) shown in FIG. 10 described later, the terminal surface is pressed by the pressing surface 34a. The portion Ww is pressed in the coil spring forming direction, and the wire W is bent at the terminal bent portion Wx.
【００４６】次いで、本発明の第２実施例によってコイ
ルばねの両端を内曲げ成形する方法について、図８乃至
図１０および図１５の説明図を参照して以下のとおり説
明する。 図８は押出しピッチ工具３４が前進して巻回
される線材Ｗにピッチが付与されコイルばねＳが成形さ
れた状態を示し、 図９は線材挟入工具１３が前進して
線材Ｗの終端近傍が抑止された状態を示し、 図１０は
押出しピッチ工具３４が前進して線材Ｗの終端部が折曲
された状態を示し、 図１５は両端が内曲げ成形された
コイルばねＳを示す説明図である。Next, a method for bending both ends of the coil spring inward according to the second embodiment of the present invention will be described with reference to FIGS. 8 to 10 and FIG. 8 shows a state in which a pitch is given to the wire W to be wound by the extrusion pitch tool 34 being advanced and the coil spring S is formed. FIG. 9 is a diagram showing the vicinity of the end of the wire W when the wire pinching tool 13 is advanced. FIG. 10 shows a state in which the extrusion pitch tool 34 advances and the terminal end of the wire W is bent, and FIG. 15 is an explanatory view showing a coil spring S in which both ends are bent inward. It is.
【００４７】この第２実施例よるコイルばねの両端を内
曲げ成形する方法は、第１実施例の図１乃至図３におい
て上述した、「図１に示す状態から線材Ｗを繰り出して
巻回工具３Ａ，３Ｂに衝合させると図２に示す始端部が
形成され、線材挟入工具１３で線材Ｗの始端抑止部Ｗｄ
を抑止するとともに、始端押圧工具２３で線材Ｗの始端
押圧部Ｗｂを押圧すると、線材Ｗの始端部は、図３に示
すようにコイルばね軸方向内側に折り曲げ成形される」
ところまでと、第１実施例の図７において上述した、
「切断工具５と芯金６との剪断作用によって線材Ｗの終
端Ｗｚが切断されると、図７に示すように両端がコイル
ばね軸方向の内側に曲げられたコイルばねＳが巻成す
る」ところとは第１実施例と同一の方法である。 従っ
て、第１実施例と同一の部分については説明を省略し、
相違する部分について説明する。The method of bending both ends of the coil spring in accordance with the second embodiment is described in the first embodiment of FIGS. 1 to 3 described above. 3A and 3B, the starting end shown in FIG. 2 is formed, and the starting end restraining portion Wd of the wire W is formed by the wire inserting tool 13.
When the starting end pressing tool 23 presses the starting end pressing portion Wb of the wire W, the starting end of the wire W is bent and formed inward in the axial direction of the coil spring as shown in FIG. 3 ".
As described above in FIG. 7 of the first embodiment,
"When the end Wz of the wire W is cut by the shearing action of the cutting tool 5 and the cored bar 6, a coil spring S whose both ends are bent inward in the coil spring axial direction as shown in FIG. 7 is wound." However, this is the same method as in the first embodiment. Therefore, the description of the same parts as in the first embodiment is omitted,
The different parts will be described.
【００４８】相違するところは、第１実施例の図４乃至
図６において上述した、「楔形ピッチ工具３３で線材Ｗ
にピッチを付与しながら線材Ｗを繰り出すと、図４に示
すように所要長のコイルばねＳが形成され、次いで、図
５に示す線材挟入工具１３で線材Ｗの終端抑止部Ｗｙを
抑止するとともに、楔形ピッチ工具３３で線材Ｗの終端
押圧部Ｗｗを押圧すると、線材Ｗの終端部は、図６に示
すようにコイルばね軸方向内側に折り曲げ成形される」
ところが相違するものであって、第２実施例において
は、後述する押出しピッチ工具３４が第１実施例の楔形
ピッチ工具３３と同様の作用をするものである。The difference is that the wedge-shaped pitch tool 33 described above with reference to FIGS.
When the wire W is fed out while giving a pitch to the wire, a coil spring S of a required length is formed as shown in FIG. 4, and then, the end restraining portion Wy of the wire W is suppressed by the wire inserting tool 13 shown in FIG. At the same time, when the end pressing portion Ww of the wire W is pressed by the wedge-shaped pitch tool 33, the end of the wire W is bent and formed inward in the axial direction of the coil spring as shown in FIG.
However, in the second embodiment, an extruded pitch tool 34, which will be described later, has the same function as the wedge-shaped pitch tool 33 of the first embodiment.
【００４９】まず、図３に示すように、線材Ｗの始端部
がコイルばね軸方向内側に折り曲げ成形され後、始端押
圧工具２３と線材挟入工具１３とを後退させてそれぞれ
図８に示す後退端で待機させた後、次いで、押出しピッ
チ工具３４をコイルばね成形方向に向かって所要位置ま
で前進させ、一対の送りローラ１，１（図１１参照）に
よって線材Ｗを送り出し、線ガイド２から繰り出される
線材Ｗを巻回工具３Ａ，３Ｂに衝合させると、線材Ｗの
ピッチ付与部Ｗｐは、後面側が押出しピッチ工具３４の
先端に形成された押圧面３４ａと当接し、この押圧面３
４ａによって線材Ｗのピッチ付与部Ｗｐは、図８（ｂ）
に示すようにコイルばね成形方向（図示の右方）に付勢
されて所要リードのピッチが付与され、線ガイド２から
所要長の線材Ｗを繰り出すことでコイルばねＳが形成さ
れる。First, as shown in FIG. 3, after the starting end of the wire W is bent and formed inward in the axial direction of the coil spring, the starting end pressing tool 23 and the wire pinching tool 13 are retreated, and the retreating shown in FIG. After waiting at the end, the extrusion pitch tool 34 is advanced to the required position in the coil spring forming direction, and the wire W is fed out by the pair of feed rollers 1 and 1 (see FIG. 11), and is fed out from the wire guide 2. When the wire W to be wound is brought into contact with the winding tools 3A and 3B, the pitch imparting portion Wp of the wire W comes into contact with the pressing surface 34a formed at the tip of the extrusion pitch tool 34 on the rear surface side.
4A, the pitch applying portion Wp of the wire W is formed as shown in FIG.
As shown in (1), a required lead pitch is given by being urged in the coil spring forming direction (rightward in the figure), and a coil W of a required length is fed out from the wire guide 2 to form a coil spring S.
【００５０】そして、コイルばねＳが形成され一対の送
りローラ１，１の回転を停止して、線ガイド２から繰り
出される線材Ｗを停止させるとともに、押出しピッチ工
具３４を図９に示す位置まで後退させると、線材Ｗのピ
ッチ付与部Ｗｐは、コイルばね成形方向に付勢されない
状態になる。Then, the coil spring S is formed, the rotation of the pair of feed rollers 1 and 1 is stopped, the wire W fed from the wire guide 2 is stopped, and the pushing pitch tool 34 is retracted to the position shown in FIG. Then, the pitch applying portion Wp of the wire W is not urged in the coil spring forming direction.
【００５１】次いで、線ガイド２から繰り出される線材
Ｗを停止させた後またはその直前に線材挟入工具１３を
コイル軸心に向かって前進させると、その先端部に形成
された凹溝１３ｕ内に線材Ｗの終端抑止部Ｗｙが挟入さ
れ、線材Ｗは、図９（ｂ）に示すように凹溝１３ｕの他
方の内側面１３ｂによってコイルばね成形方向（図示の
右方）に抑止される。Next, after the wire rod W fed from the wire guide 2 is stopped or immediately before the wire rod inserting tool 13 is advanced toward the coil axis, the wire rod inserting tool 13 is moved into the concave groove 13u formed at the distal end thereof. The terminal end suppressing portion Wy of the wire W is sandwiched, and the wire W is suppressed in the coil spring forming direction (rightward in the drawing) by the other inner side surface 13b of the concave groove 13u as shown in FIG. 9B.
【００５２】そして、押出しピッチ工具３４を図９に示
す位置からコイルばね成形方向に向かって前進させる
と、線材Ｗの後面側が押出しピッチ工具３４の押圧面３
４ａと当接し、さらに図１０に示す所要位置まで前進さ
せると、線材Ｗの終端押圧部Ｗｗ（前記ピッチ付与部Ｗ
ｐと近似位置）は、後面側が押出しピッチ工具３４に形
成された押圧面３４ａの押出し作用によってコイルばね
成形方向に押圧され、この押圧される終端押圧部Ｗｗと
線材挟入工具１３の凹溝１３ｕで抑止されている終端抑
止部Ｗｙとの間の終端折曲部Ｗｘを折曲位置にして、図
１０に示すように、線材Ｗの終端部はコイルばね軸方向
内側に折り曲げ成形される。 なお、上述した押出しピ
ッチ工具３４は、図１０に示す前進端位置に到達すると
略同時に後退させるとともに、線材挟入工具１３は、押
出しピッチ工具３４の押圧面３４ａが線材Ｗから脱離さ
れた後に後退させて後退端で待機させる。When the pushing pitch tool 34 is advanced from the position shown in FIG. 9 in the coil spring forming direction, the rear surface of the wire W is pressed against the pressing surface 3 of the pushing pitch tool 34.
4a, and further advanced to the required position shown in FIG.
The rear surface side is pressed in the coil spring forming direction by the pushing action of the pushing surface 34 a formed on the pushing pitch tool 34, and the trailing end pushing portion Ww and the groove 13 u of the wire pinching tool 13 are pressed. As shown in FIG. 10, the terminal bent portion Wx between the terminal restraining portion Wy and the terminal restraining portion Wy is bent, and as shown in FIG. 10, the terminal portion of the wire W is bent and formed inward in the axial direction of the coil spring. Note that the above-described extrusion pitch tool 34 is retracted almost simultaneously when it reaches the forward end position shown in FIG. 10, and the wire pinching tool 13 is moved after the pressing surface 34 a of the extrusion pitch tool 34 is detached from the wire W. Retreat and wait at the retreat end.
【００５３】次いで、第１実施例の図７において上述し
たように、切断工具５と芯金６との剪断作用によって線
材Ｗの終端Ｗｚが切断されると、コイルばねＳは終端Ｗ
ｚが線材Ｗから切り離され、始端Ｗａと終端Ｗｚとの両
端が、図１５に示すようにコイルばね軸方向の内側に曲
げられたコイルばねＳが巻成する。 そして、コイルば
ねＳが線材Ｗから切り離された後、切断工具５を後退さ
せて図１に示す後退端で待機させる。Next, as described above with reference to FIG. 7 of the first embodiment, when the end Wz of the wire W is cut by the shearing action of the cutting tool 5 and the cored bar 6, the coil spring S is moved to the end W.
z is separated from the wire W, and a coil spring S whose both ends of the start end Wa and the end end Wz are bent inward in the coil spring axial direction as shown in FIG. 15 is wound. Then, after the coil spring S is cut off from the wire W, the cutting tool 5 is retracted and made to stand by at a retracted end shown in FIG.
【００５４】上述した、第２実施例による線材Ｗの巻回
始めからコイルばねＳが巻成されるまでの１サイクルを
要約すると、 （１）図１に示す状態から線材Ｗを繰り
出して巻回工具３Ａ，３Ｂに衝合させると図２に示す始
端部が形成され、 （２）線材挟入工具１３で線材Ｗの
始端抑止部Ｗｄを抑止するとともに、始端押圧工具２３
で線材Ｗの始端押圧部Ｗｂを押圧すると、線材Ｗの始端
部は、図３に示すようにコイルばね軸方向内側に折り曲
げ成形され、 （３）押出しピッチ工具３４で線材Ｗに
ピッチを付与しながら線材Ｗを繰り出すと、図８に示す
ように所要長のコイルばねＳが形成され、 （４）図９
に示す線材挟入工具１３で線材Ｗの終端抑止部Ｗｙを抑
止するとともに、押出しピッチ工具３４で線材Ｗの終端
押圧部Ｗｗを押圧すると、線材Ｗの終端部は、図１０に
示すようにコイルばね軸方向内側に折り曲げ成形され、
（５）切断工具５と芯金６との剪断作用によって線材
Ｗの終端Ｗｚが切断されると、図７に示すように両端が
コイルばね軸方向の内側に曲げられたコイルばねＳが巻
成する。The following is a summary of one cycle from the start of winding of the wire W according to the second embodiment to the winding of the coil spring S. (1) The wire W is drawn out from the state shown in FIG. When the tools 3A and 3B are brought into contact with each other, the starting end shown in FIG. 2 is formed. (2) The starting end suppressing portion Wd of the wire W is suppressed by the wire inserting tool 13 and the starting pressing tool 23
When pressing the start end pressing portion Wb of the wire W, the start end of the wire W is bent and formed inward in the axial direction of the coil spring as shown in FIG. 3. (3) The pitch is given to the wire W by the extrusion pitch tool 34. When the wire W is fed out, a coil spring S having a required length is formed as shown in FIG. 8, and (4) FIG.
As shown in FIG. 10, when the end-point suppressing portion Wy of the wire W is suppressed by the wire-inserting tool 13 and the end pressing portion Ww of the wire W is pressed by the extrusion pitch tool 34, the end of the wire W Bent inward in the axial direction of the spring,
(5) When the terminal Wz of the wire W is cut by the shearing action of the cutting tool 5 and the cored bar 6, a coil spring S whose both ends are bent inward in the coil spring axial direction is wound as shown in FIG. I do.
【００５５】なお、本実施例では終端曲げ手段３０が、
第１実施例においては楔形ピッチ工具３３を備えるコイ
ルばね製造機で、第２実施例においては押出しピッチ工
具３４を備えるコイルばね製造機で説明したが、楔形ピ
ッチ工具３３と押出しピッチ工具３４とを備えるコイル
ばね製造機で、いずれかのピッチツールを選択してコイ
ルばねの両端を内曲げ成形しても本発明の実施ができる
ことは当然である。In this embodiment, the terminal bending means 30 is
In the first embodiment, a coil spring manufacturing machine having a wedge-shaped pitch tool 33 has been described. In the second embodiment, a coil spring manufacturing machine having an extrusion pitch tool 34 has been described. It goes without saying that the present invention can be carried out even if one of the pitch tools is selected in the coil spring manufacturing machine provided and both ends of the coil spring are bent inward.
【００５６】[0056]
【発明の効果】本発明は、上述のとおりになされている
ので、以下に記載するような効果を奏する。The present invention has been made as described above, and has the following effects.
【００５７】コイルばねの一方の始端は、線材の始端近
傍をコイルばね成形方向と逆方向に抑止して、始端部の
線材Ｗをコイルばね成形方向と逆方向に押圧して始端部
をコイルばね軸方向内側に折り曲げ成形し、また、他方
の終端は、線材の終端近傍をコイルばね成形方向に抑止
して、終端部の線材をコイルばね成形方向に押圧して終
端部をコイルばね軸方向内側に折り曲げ成形するように
したので、コイルばねの始端と終端との両端をコイルば
ね軸方向のそれぞれ内側に曲げて、鋭角な角部がばね座
に膨出することなく、コイルばねの繰り返し伸縮運動で
その構成部材のばね受け面が削り取られないコイルばね
を容易に成形できる。One starting end of the coil spring suppresses the vicinity of the starting end of the wire in the direction opposite to the coil spring forming direction, and presses the wire W at the starting end in the direction opposite to the coil spring forming direction so that the starting end is the coil spring. The wire is bent inward in the axial direction and the other end is restrained in the coil spring forming direction near the terminal end of the wire, and the wire at the terminal end is pressed in the coil spring forming direction to move the terminal end inward in the coil spring axial direction. Since the coil spring is bent and formed, both ends of the starting end and the end of the coil spring are bent inward in the axial direction of the coil spring, so that the sharp corners do not bulge into the spring seat, and the coil spring repeatedly expands and contracts. Accordingly, a coil spring whose spring receiving surface of the component is not removed can be easily formed.
【００５８】また、線材抑止手段は、先端部に形成され
た凹溝の一方の内側面で線材をコイルばね成形方向と逆
方向に抑止するとともに、凹溝の他方の内側面で線材を
コイルばね成形方向に抑止する線材挟入工具を用いるよ
うにしたので、線材を確実に抑止できるとともに、コイ
ルばね成形方向の正逆両方向に線材を抑止することがで
き構成が簡素にできる。The wire rod restraining means restrains the wire rod in the direction opposite to the coil spring forming direction on one inner side surface of the groove formed at the tip end, and turns the wire rod on the other inner side surface of the groove. Since the wire insertion tool that suppresses in the forming direction is used, the wire can be reliably suppressed, and the wire can be suppressed in both the forward and reverse directions of the coil spring forming direction, so that the configuration can be simplified.
【００５９】また、始端曲げ手段は、先端部に形成され
た押圧面で線材の始端部をコイルばね成形方向と逆方向
に押圧する始端押圧工具を用いるようにしたので、前述
の線材抑止手段と協動して、始端部近傍の線材を確実に
コイルばね軸方向内側に折り曲げ成形することができ
る。Further, the starting end bending means uses a starting end pressing tool which presses the starting end of the wire in the direction opposite to the coil spring forming direction on the pressing surface formed at the tip end. By cooperating with each other, the wire rod near the start end can be reliably bent and formed inward in the axial direction of the coil spring.
【００６０】また、一方の終端曲げ手段は、先端部に形
成された傾斜面で線材の終端部をコイルばね成形方向に
押圧する楔形ピッチ工具を用いるようにしたので、前述
の線材抑止手段と協動して、終端部近傍の線材を確実に
コイルばね軸方向内側に折り曲げ成形することができる
とともに、楔形ピッチ工具はコイルばねのコイル胴部に
所定のピッチも付与できるので構成が簡素にできる。Also, since one end bending means uses a wedge-shaped pitch tool for pressing the end of the wire in the coil spring forming direction on the inclined surface formed at the tip, the wedge-shaped pitch tool is used. As a result, the wire rod near the terminal end can be reliably bent inward in the axial direction of the coil spring, and the wedge-shaped pitch tool can also provide a predetermined pitch to the coil body of the coil spring, so that the configuration can be simplified.
【００６１】さらに、前欄に記載した一方の終端曲げ手
段を用いない場合の別の手段である他方の終端曲げ手段
は、先端部に形成された押圧面で線材の終端部をコイル
ばね成形方向に押圧する押出しピッチ工具を用いるよう
にしたので、前述の線材抑止手段と協動して、終端部近
傍の線材を確実にコイルばね軸方向内側に折り曲げ成形
することができるとともに、押出しピッチ工具はコイル
ばねのコイル胴部に所定のピッチも付与できるので構成
が簡素にできる。Further, the other end bending means, which is another means in the case where the one end bending means described in the preceding column is not used, uses the pressing surface formed at the front end to move the end of the wire in the coil spring forming direction. Since the extruded pitch tool is used to press the extruded pitch tool, the extruded pitch tool can be reliably bent and formed inward in the axial direction of the coil spring in cooperation with the above-described wire rod suppressing means. Since a predetermined pitch can also be given to the coil body of the coil spring, the configuration can be simplified.
【００６２】従って、コイルばねにピッチを付与するピ
ッチ工具は、少なくとも楔形ピッチ工具または押出しピ
ッチ工具のいずれかの機能を備えるコイルばね製造機で
あれば、本発明による、両端をコイルばね軸方向のそれ
ぞれ内側に折り曲げるコイルばねの製造装置が容易に構
成できるので、装置の作製費用およびコイルばね成形品
の原価が安価にできる。Accordingly, the pitch tool for imparting a pitch to the coil spring is a coil spring manufacturing machine having at least either a wedge-shaped pitch tool or an extruded pitch tool. Since the manufacturing apparatus for the coil springs to be bent inward can be easily configured, the manufacturing cost of the apparatus and the cost of the coil spring molded product can be reduced.
【図１】本発明の第１実施例による、加工前の待機位置
を示す説明図であって、（ａ）は正面図、（ｂ）は側面
図である。FIG. 1 is an explanatory view showing a standby position before machining according to a first embodiment of the present invention, wherein (a) is a front view and (b) is a side view.
【図２】同じく、線材挟入工具１３が前進して、線材Ｗ
の始端近傍が抑止された状態を示す説明図であって、
（ａ）は正面図、（ｂ）は（ａ）の矢視図である。FIG. 2 is also a diagram showing a state in which a wire rod insertion tool 13 moves forward to
It is an explanatory view showing a state in which the vicinity of the starting end is suppressed,
(A) is a front view, (b) is an arrow view of (a).
【図３】同じく、始端押圧工具２３が前進して、線材Ｗ
の始端部が折曲された状態を示す説明図であって、
（ａ）は正面図、（ｂ）は（ａ）の矢視図である。FIG. 3 is also similar to FIG.
It is an explanatory view showing a state in which the starting end of is bent,
(A) is a front view, (b) is an arrow view of (a).
【図４】同じく、線材挟入工具１３と始端押圧工具２３
とが後退し楔形ピッチ工具３３が前進して、巻回される
線材Ｗにピッチが付与されコイルばねＳが成形された状
態を示す説明図であって、（ａ）は正面図、（ｂ）は側
面図である。FIG. 4 is also a diagram illustrating a wire rod insertion tool 13 and a start end pressing tool 23.
FIGS. 7A and 7B are explanatory diagrams showing a state in which the wire rod W to be wound is provided with a pitch and the coil spring S is formed by retracting the wedge-shaped pitch tool 33, and FIG. 9A is a front view, and FIG. Is a side view.
【図５】同じく、楔形ピッチ工具３３が後退し線材挟入
工具１３が前進して、線材Ｗの終端近傍が抑止された状
態を示す説明図であって、（ａ）は正面図、（ｂ）は
（ａ）の矢視図である。5A and 5B are explanatory views showing a state in which the wedge-shaped pitch tool 33 is retracted, the wire rod insertion tool 13 is advanced, and the vicinity of the end of the wire rod W is suppressed, and FIG. 5A is a front view, and FIG. () Is an arrow view of (a).
【図６】同じく、楔形ピッチ工具３３が前進して、線材
Ｗの終端部が折曲された状態を示す説明図であって、
（ａ）は正面図、（ｂ）は（ａ）の矢視図である。FIG. 6 is an explanatory view showing a state in which the wedge-shaped pitch tool 33 is advanced and the end of the wire W is bent,
(A) is a front view, (b) is an arrow view of (a).
【図７】同じく、線材挟入工具１３と楔形ピッチ工具３
３とが後退し切断工具５が前進して、コイルばね終端の
線材Ｗが切断された状態を示す説明図であって、（ａ）
は正面図、（ｂ）は側面図である。[FIG. 7] Similarly, a wire pinching tool 13 and a wedge-shaped pitch tool 3
3A is an explanatory view showing a state in which the wire W at the terminal end of the coil spring has been cut, with the cutting tool 5 moving forward and the cutting tool 5 being advanced, and FIG.
Is a front view, and (b) is a side view.
【図８】本発明の第２実施例による、線材挟入工具１３
と始端押圧工具２３とが後退し押出しピッチ工具３４が
前進して、巻回される線材Ｗにピッチが付与されコイル
ばねＳが成形された状態を示す説明図であって、（ａ）
は正面図、（ｂ）は側面図である。FIG. 8 shows a wire insertion tool 13 according to a second embodiment of the present invention.
(A) is a diagram illustrating a state in which a pitch is applied to a wire W to be wound and a coil spring S is formed, with the extruding pitch tool 34 moving forward, the retreating of the starting end pressing tool 23, and (a).
Is a front view, and (b) is a side view.
【図９】同じく、押出しピッチ工具３４が後退し線材挟
入工具１３が前進して、線材Ｗの終端近傍が抑止された
状態を示す説明図であって、（ａ）は正面図、（ｂ）は
（ａ）の矢視図である。9 is an explanatory view showing a state in which the extrusion pitch tool 34 is retracted and the wire rod insertion tool 13 is advanced, and the vicinity of the end of the wire rod W is suppressed; FIG. 9A is a front view, and FIG. () Is an arrow view of (a).
【図１０】同じく、押出しピッチ工具３４が前進して、
線材Ｗの終端部が折曲された状態を示す説明図であっ
て、（ａ）は正面図、（ｂ）は（ａ）の矢視図である。FIG. 10 Similarly, the extrusion pitch tool 34 advances,
It is explanatory drawing which shows the state which the terminal part of wire W was bent, (a) is a front view, (b) is an arrow view of (a).
【図１１】本発明の第１実施例によって、コイルばねの
両端を内曲げ成形するための装置を示す説明図であっ
て、コイルばね製造機の主要部正面図である。FIG. 11 is an explanatory view showing an apparatus for inwardly bending both ends of a coil spring according to the first embodiment of the present invention, and is a front view of a main part of a coil spring manufacturing machine.
【図１２】図１１の縦断面図である。FIG. 12 is a longitudinal sectional view of FIG.
【図１３】図１１に示す線材挟入工具１３の先端部拡大
図であって、（ａ）は正面図、（ｂ）は側面図である。13 is an enlarged view of a distal end portion of the wire rod insertion tool 13 shown in FIG. 11, (a) is a front view, and (b) is a side view.
【図１４】本発明の第２実施例によって、コイルばねの
両端を内曲げ成形するための装置を示す説明図であっ
て、コイルばね製造機の主要部正面図である。FIG. 14 is an explanatory view showing an apparatus for inwardly bending both ends of a coil spring according to a second embodiment of the present invention, and is a front view of a main part of a coil spring manufacturing machine.
【図１５】本発明によって、両端が内曲げ成形されたコ
イルばねＳを示す説明図であって、（ａ）は正面図、
（ｂ）は側面図である。FIG. 15 is an explanatory view showing a coil spring S in which both ends are bent inward according to the present invention, wherein (a) is a front view,
(B) is a side view.
２ 線ガイド ３Ａ，３Ｂ 巻回工具 ５ 切断工具 ６ 芯金 １０ 線材抑止手段 １３ 線材挟入工具 １３ａ 一方の内側面 １３ｂ 他方の内側面 ２０ 始端曲げ手段 ２３ 始端押圧工具 ２３ａ 押圧面 ３０ 終端曲げ手段 ３３ 楔形ピッチ工具 ３３ａ 傾斜面 ３４ 押出しピッチ工具 ３４ａ 押圧面 Ｓ コイルばね Ｗ 線材 Ｗａ 始端 Ｗｂ 始端押圧部 Ｗｃ 始端折曲部 Ｗｄ 始端抑止部 Ｗｗ 終端押圧部 Ｗｘ 終端折曲部 Ｗｙ 終端抑止部 Ｗｚ 終端 Reference Signs List 2 wire guide 3A, 3B winding tool 5 cutting tool 6 core metal 10 wire rod restraining means 13 wire rod inserting tool 13a one inner side surface 13b other inner side surface 20 start bending means 23 start pressing tool 23a pressing surface 30 end bending means 33 Wedge-shaped pitch tool 33a Inclined surface 34 Extrusion pitch tool 34a Pressing surface S Coil spring W Wire rod Wa Start end Wb Start end pressing portion Wc Start bending portion Wd Start preventing portion Ww Terminal pressing portion Wx Terminal bending portion Wy Terminal suppressing portion Wz Terminal
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21F 35/02 B21F 1/00 B21F 3/06 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B21F 35/02 B21F 1/00 B21F 3/06
Claims (5)
ガイドから繰り出される線材を巻回工具に衝合させて巻
回されるコイルばねの始端と終端との両端をコイルばね
軸方向のそれぞれ内側に曲げる方法であって、 巻回された線材の始端近傍を線材抑止手段によってコイ
ルばね成形方向と逆方向に抑止して、この抑止された部
分と始端との間の線材を始端曲げ手段によってコイルば
ね成形方向と逆方向に押圧して始端部をコイルばね軸方
向内側に折り曲げ成形し、引き続き線材を巻回工具に衝
合させて所定巻回数のコイルばねに成形した後、巻回さ
れた線材の終端近傍を前記線材抑止手段によってコイル
ばね成形方向に抑止して、この抑止された部分よりも始
端側の近傍の線材を終端曲げ手段によってコイルばね成
形方向に押圧して終端部をコイルばね軸方向内側に折り
曲げ成形し、コイルばねの始端と終端との両端をコイル
ばね軸方向のそれぞれ内側に曲げるようにしたことを特
徴とするコイルばねの両端内曲げ方法。1. A method in which a wire material fed from a wire guide by at least a pair of feed rollers is abutted against a winding tool and both ends of a coil spring wound around the coil spring are bent inward in the axial direction of the coil spring. Wherein the vicinity of the starting end of the wound wire is suppressed in a direction opposite to the coil spring forming direction by wire suppressing means, and the wire between the suppressed portion and the starting end is formed by the starting end bending means in the coil spring forming direction. After pressing the wire in the opposite direction and bending the starting end inward in the axial direction of the coil spring, and then abutting the wire against the winding tool to form a coil spring with a predetermined number of turns, near the end of the wound wire Is restrained in the coil spring forming direction by the wire rod restraining means, and the wire near the starting end side from the restrained portion is pressed in the coil spring forming direction by the terminating bending means to set the end portion. Yl spring shaft bent and formed into inwardly, both ends in the bending process of the coil spring, characterized in that each of the two ends of the beginning and end of the coil spring of the coil spring axis and the bend inward.
可能な先端部に凹溝が形成され、前記先端部がコイル軸
心に向かって進出して線材の始端近傍または終端近傍が
前記凹溝に挟入された状態において、前記凹溝の一方の
内側面で線材をコイルばね成形方向と逆方向に抑止する
とともに、他方の内側面で線材をコイルばね成形方向に
抑止する線材挟入工具を用いるようにした請求項１に記
載されたコイルばねの両端内曲げ方法。2. The wire rod restraining means according to claim 1, wherein a concave groove is formed at a tip end of the wound wire rod that can advance and retreat toward a coil axis so that the wound wire rod can be inserted between the coil rod and the coil. In a state in which the wire is advanced toward the axis and the vicinity of the beginning or end of the wire is sandwiched in the groove, the wire is restrained in a direction opposite to the coil spring forming direction on one inner side surface of the groove, 2. The method for bending both ends of a coil spring according to claim 1, wherein a wire rod insertion tool for restraining the wire rod in the coil spring forming direction on the other inner side surface is used.
ね成形方向と逆方向に進退可能な先端部に押圧面が形成
され、前記押圧面がコイルばね成形方向と逆方向に進出
して線材の始端部前面に当接し、さらに前記押圧面が同
方向に進出した状態において、前記押圧面で線材の始端
部をコイルばね成形方向と逆方向に押圧する始端押圧工
具を用いるようにした請求項１または請求項２に記載さ
れたコイルばねの両端内曲げ方法。3. The starting end bending means according to claim 1, wherein a pressing surface is formed on a front end portion which can advance and retreat in a direction opposite to a coil spring forming direction so as to be able to abut only on the front surface of the starting end portion of the wound wire. The pressing surface advances in the direction opposite to the coil spring forming direction and abuts on the front surface of the starting end of the wire. Further, in a state where the pressing surface advances in the same direction, the starting end of the wire is 3. The method for bending both ends of a coil spring according to claim 1, wherein a starting end pressing tool for pressing in a direction opposite to the forming direction is used.
心に向かって進退可能な先端部に傾斜面が形成され、前
記先端部がコイル軸心に向かって進出して線材の終端部
後面に当接し、さらに前記先端部が同方向に向かって進
出した状態において、前記先端部の傾斜面で線材の終端
部をコイルばね成形方向に押圧する楔形ピッチ工具を用
いるようにした請求項１、請求項２または請求項３のい
ずれかに記載されたコイルばねの両端内曲げ方法。4. The terminal bending means according to claim 1, wherein an inclined surface is formed at a front end portion which can advance and retreat toward the coil axis so as to be able to contact only the rear surface of the terminal end portion of the wound wire material. In a state where the distal end portion advances toward the coil axis and abuts on the rear surface of the end portion of the wire, and further, the distal end portion advances in the same direction, the terminal end portion of the wire is coiled on the inclined surface of the distal end portion. 4. The method for bending both ends of a coil spring according to claim 1, wherein a wedge-shaped pitch tool for pressing in a spring forming direction is used.
ね成形方向に進退可能な先端部に押圧面が形成され、前
記押圧面がコイルばね成形方向に進出して線材の終端部
後面に当接し、さらに前記押圧面が同方向に進出した状
態において、前記押圧面で線材の終端部をコイルばね成
形方向に押圧する押出しピッチ工具を用いるようにした
請求項１、請求項２または請求項３のいずれかに記載さ
れたコイルばねの両端内曲げ方法。5. The terminal bending means according to claim 1, wherein a pressing surface is formed at a front end portion which can advance and retreat in a coil spring forming direction so as to be able to contact only a rear surface of a terminal end portion of the wound wire material. In a state in which the pressing surface advances in the coil spring forming direction and abuts on the rear surface of the terminal end of the wire, and further in a state where the pressing surface advances in the same direction, the pressing surface presses the terminal end of the wire in the coil spring forming direction. 4. The method for bending both ends of a coil spring according to claim 1, wherein a pitch tool is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33494696A JP3266528B2 (en) | 1996-11-29 | 1996-11-29 | Bending method at both ends of coil spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33494696A JP3266528B2 (en) | 1996-11-29 | 1996-11-29 | Bending method at both ends of coil spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10156469A JPH10156469A (en) | 1998-06-16 |
| JP3266528B2 true JP3266528B2 (en) | 2002-03-18 |
Family
ID=18283009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33494696A Expired - Fee Related JP3266528B2 (en) | 1996-11-29 | 1996-11-29 | Bending method at both ends of coil spring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3266528B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4608134B2 (en) * | 2001-06-15 | 2011-01-05 | 高周波熱錬株式会社 | Round hoop muscle processing apparatus and round hoop muscle processing method |
| JP6368661B2 (en) * | 2015-02-27 | 2018-08-01 | 日本発條株式会社 | Coil spring manufacturing apparatus and coil spring manufacturing method |
| CN107410100B (en) * | 2017-09-22 | 2023-06-20 | 吴晓彬 | Coiling device and coiling method for bee pollen remover |
| CN117548591B (en) * | 2024-01-10 | 2024-04-02 | 常州泰山弹簧有限公司 | Spring coiling device for spring processing |
-
1996
- 1996-11-29 JP JP33494696A patent/JP3266528B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10156469A (en) | 1998-06-16 |
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