JP4463032B2 - Pressed stud bolt - Google Patents

Pressed stud bolt Download PDF

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JP4463032B2
JP4463032B2 JP2004215841A JP2004215841A JP4463032B2 JP 4463032 B2 JP4463032 B2 JP 4463032B2 JP 2004215841 A JP2004215841 A JP 2004215841A JP 2004215841 A JP2004215841 A JP 2004215841A JP 4463032 B2 JP4463032 B2 JP 4463032B2
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head
stud bolt
press
plate
hole
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JP2006038026A (en
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茂美 細江
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日本ドライブイット株式会社
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Description

本発明は、ボルトの頭部外形よりも小径の孔にスタッドボルトの頭部をプレス機器により圧入するプレス型のスタッドボルトに関する。   The present invention relates to a press-type stud bolt in which a stud bolt head is press-fitted into a hole having a smaller diameter than a bolt head outer shape by a press machine.

プレス型のスタッドボルトとして、図６に示すものが知られている。このスタッドボルト11は、フランジ状の頭部３の外周にローレット加工面７が形成され、その軸部４の外周には外ネジ４ａが形成されている。そして金属製の板材１に予め頭部３の外周よりも小さな直径の孔２が穿設される。この孔２の直径は、外ネジ４ａの外直径よりも僅かに大に形成されている。そしてボルトを植設する際には、板材１の図において下面側の孔縁部に下型として円筒形の支持体８が配置され、それにより板材１を支持する。
このような状態で頭部３を図において下方に圧入し、孔２の孔縁部を変形させ頭部３を板材１に埋設することにより、スタッドボルト11の軸部４を図において下面側に植設させるものである。 As a press-type stud bolt, one shown in FIG. 6 is known. The stud bolt 11 has a knurled surface 7 formed on the outer periphery of the flange-shaped head 3 and an outer screw 4 a formed on the outer periphery of the shaft portion 4. A hole 2 having a diameter smaller than that of the outer periphery of the head 3 is formed in the metal plate 1 in advance. The diameter of the hole 2 is slightly larger than the outer diameter of the external screw 4a. When the bolts are planted, a cylindrical support 8 is disposed as a lower mold at the hole edge on the lower surface side in the drawing of the plate material 1, thereby supporting the plate material 1.
In such a state, the head 3 is press-fitted downward in the drawing, the hole edge portion of the hole 2 is deformed, and the head 3 is embedded in the plate 1 so that the shaft portion 4 of the stud bolt 11 is placed on the lower surface side in the drawing. It is to be planted.

従来のプレス型のスタッドボルトは、図６（Ａ）の状態から頭部３を板材１の孔縁部に圧入すると、同図（Ｂ）の如く、板材１の孔縁の塑性変形部は、頭部３の下面側の外ネジ４ａの各谷部に進入する。次いで、同図（Ｃ）の如く頭部３の上面と板材１の上面とが一致するまで押圧されると、板材１の孔縁部の塑性変形部は、板材１の下面側よりもさらに下面側の外ネジ４ａの谷部まで進入する。なお、図６は従来のプレスタイプのスタッドボルトの埋込工程を説明するために、巨視的に表現したものである（以下、埋込工程は同様に表現する）。   When a conventional press-type stud bolt is press-fitted into the hole edge portion of the plate material 1 from the state of FIG. 6A, the plastic deformation portion of the hole edge of the plate material 1 is as shown in FIG. It enters each valley of the external screw 4a on the lower surface side of the head 3. Next, as shown in FIG. 3C, when the top surface of the head 3 and the top surface of the plate material 1 are pressed until they coincide, the plastic deformation portion at the hole edge of the plate material 1 is further lower than the bottom surface side of the plate material 1. Enter the valley of the external screw 4a on the side. FIG. 6 is a macroscopic representation for explaining a conventional press-type stud bolt embedding process (hereinafter, the embedding process is similarly expressed).

その埋込の際、板材１はその孔縁部において、板材１が圧入方向に引き込まれることになり、板材１の外面には頭部３の回りに環状凹部10が形成される。このため、材料の流れが圧入方向側へ引き込まれるので、板材の歪みの影響する範囲が、頭部を中心にして大きくなる。
特に、複数本のスタッドボルトを近接して植設する場合には、相互の歪みの影響を受け、板材１は見た目にも変形が目立つようになる。そのため板材１の体裁が悪くなると共に、スタッドボルト11の止着力が比較的弱いものとなる。従って、これまではスタッドボルトの植設間隔をあまり小さくできないという問題が生じていた。
そこで本発明は、係る問題点を解決することを課題とする。 At the time of the embedding, the plate material 1 is drawn in the press-fitting direction at the hole edge portion of the plate material 1, and an annular recess 10 is formed around the head 3 on the outer surface of the plate material 1. For this reason, since the flow of the material is drawn to the press-fitting direction side, the range affected by the distortion of the plate material is increased with the head as the center.
In particular, when a plurality of stud bolts are planted close to each other, deformation of the plate material 1 becomes conspicuous due to the influence of mutual distortion. Therefore, the appearance of the plate material 1 is deteriorated and the fastening force of the stud bolt 11 is relatively weak. Therefore, until now, there has been a problem that the stud bolt installation interval cannot be made very small.
Then, this invention makes it a subject to solve the problem which concerns.

請求項１に記載の本発明は、板材(1) の孔(2) の一方側から、フランジ状の頭部(3) が圧入埋設されて、その軸部(4)が板材(1) の他方側に植設されるスタッドボルトにおいて、
前記頭部(3) に近接して、軸部(4) の外ネジ(4a)の山部外径に等しい外径の環状突部(5) が前記軸部(4) に一体に形成され、
その環状突部(5) と前記頭部(3) との間に環状溝(6) が形成され、
その環状溝(6)の有する全容積は、頭部(3) が板材(1) に前記圧入埋設されたとき、板材(1) の孔縁部の材料が押し出される体積に等しいか、ややそれより大きい体積とされ、それにより、前記頭部(3) の前記板材(1) への圧入埋設過程で前記環状突部(5) により、前記板材(1) の前記孔(2) の縁部の塑性変形部が、主として前記環状溝(6) にのみ進入するように構成したことを特徴とするプレス型のスタッドボルトである。 According to the first aspect of the present invention, a flange-shaped head (3) is press-fitted from one side of the hole (2) of the plate (1), and its shaft (4) is formed of the plate (1). In stud bolts planted on the other side,
An annular protrusion (5) having an outer diameter equal to the outer diameter of the crest of the outer screw (4a) of the shaft portion (4) is formed integrally with the shaft portion (4) in the vicinity of the head portion (3). ,
An annular groove (6) is formed between the annular protrusion (5) and the head (3),
The total volume of the annular groove (6) is equal to or slightly equal to the volume of the material at the hole edge of the plate (1) when the head (3) is press-embedded in the plate (1). The volume of the hole (2) of the plate (1) is increased by the annular protrusion (5) during the press-fitting process of the head (3) into the plate (1). The press-type stud bolt is characterized in that the plastically deformed portion is configured to mainly enter only the annular groove (6) .

本発明のプレス型のスタッドボルトは、フランジ状の頭部３に近接して環状突部５が軸部４に一体に形成され、その環状突部５と頭部３との間に環状溝６が形成されたものであるから、板材１の孔２に頭部３をプレス圧入するとき、環状突部５の存在により板材１の孔縁部の塑性変形部が主として環状溝６のみに進入し、それによりスタッドボルトの止着力を向上できる。それと共に、板材１は環状溝６に進入するのみで、従来のように圧入方向への材料の流れ込みがないため、その材料の流れによる歪みの影響が極めて小さくなる。これにより、スタッドボルトの植設の際に、頭部３の外側に生じる環状凹部を可及的に小さくでき、歪みの影響する範囲も小さくなる。   In the press-type stud bolt of the present invention, an annular protrusion 5 is formed integrally with the shaft portion 4 in the vicinity of the flange-shaped head 3, and an annular groove 6 is formed between the annular protrusion 5 and the head 3. Therefore, when the head 3 is press-fitted into the hole 2 of the plate material 1, the plastic deformation portion at the hole edge of the plate material 1 mainly enters only the annular groove 6 due to the presence of the annular protrusion 5. Thereby, the fastening force of the stud bolt can be improved. At the same time, the plate material 1 only enters the annular groove 6 and there is no flow of material in the press-fitting direction as in the prior art, so that the influence of distortion due to the flow of the material becomes extremely small. Thereby, when the stud bolt is planted, the annular concave portion generated outside the head 3 can be made as small as possible, and the range affected by the distortion is also reduced.

次に、図面に基づいて本発明の実施の形態につき説明する。
図１（Ａ）は本発明のプレス型の第１のスタッドボルトの正面略図であり、図１（Ｂ）〜図１（Ｅ）は夫々その製造工程の手順を示す説明図である。また、図２の（Ａ）〜（Ｃ）は夫々本発明のスタッドボルト11を板材１の孔２の孔縁部にプレス圧入する場合の作用を順に示すものである。 Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic front view of a first stud bolt of a press die according to the present invention, and FIGS. 1B to 1E are explanatory views showing the steps of the manufacturing process. 2 (A) to 2 (C) sequentially show the operation when the stud bolt 11 of the present invention is press-fitted into the hole edge of the hole 2 of the plate 1 in order.

このスタッドボルト11は、図１（Ａ）に示す如く、軸部４の一端に設けられたフランジ状の頭部３に近接して、その軸部４に環状突部５が設けられている。環状突部５の外周は、軸部４の外ネジ４ａの山部の外直径に等しい。また、環状突部５は頭部３に平行に配置されている。環状突部５と頭部３との間には、環状溝６が形成されている。頭部３の外周には、ローレット加工面７が設けられている。   As shown in FIG. 1A, the stud bolt 11 is provided with an annular protrusion 5 on the shaft portion 4 adjacent to the flange-shaped head portion 3 provided at one end of the shaft portion 4. The outer periphery of the annular protrusion 5 is equal to the outer diameter of the crest of the external screw 4a of the shaft part 4. The annular protrusion 5 is disposed in parallel with the head 3. An annular groove 6 is formed between the annular protrusion 5 and the head 3. A knurled surface 7 is provided on the outer periphery of the head 3.

この図では、軸部４の外ネジ４ａの形状を略図的に形成している。一例として、軸部４の外直径は３ｍｍ〜８ｍｍ程度であり、軸部４の長さは６ｍｍ〜28ｍｍ程度である。また、頭部３の外直径は 4.5ｍｍ〜 9.5ｍｍ程度である。また、金属製板材１に下穴として穿設される孔２の直径は、 3.1ｍｍ〜 8.1ｍｍである。そして環状突部５の外直径は、前記の如く、外ネジ４ａの山部外径に等しい。
なお、外ネジ４ａのピッチおよび溝深さは、各軸直径の市販のそれらに等しい。
次に、頭部３と環状溝６との和は、一例として 2.0ｍｍ〜 4.0ｍｍである。環状溝６の全体積は、頭部３が板材に埋め込まれたとき、板材１の孔縁部の材料が押し出される体積に等しいか、ややそれより大きい体積を有する。 In this figure, the shape of the external screw 4a of the shaft portion 4 is schematically illustrated. As an example, the outer diameter of the shaft portion 4 is about 3 mm to 8 mm, and the length of the shaft portion 4 is about 6 mm to 28 mm. The outer diameter of the head 3 is about 4.5 mm to 9.5 mm. Moreover, the diameter of the hole 2 drilled as a pilot hole in the metal plate 1 is 3.1 mm to 8.1 mm. The outer diameter of the annular protrusion 5 is equal to the outer diameter of the crest of the outer screw 4a as described above.
In addition, the pitch and groove depth of the external screw 4a are equal to those of commercially available shaft diameters.
Next, the sum of the head 3 and the annular groove 6 is 2.0 mm to 4.0 mm as an example. The total volume of the annular groove 6 has a volume equal to or slightly larger than the volume of the material of the hole edge of the plate 1 when the head 3 is embedded in the plate.

このようなスタッドボルト11を製造するには、一例として次のような工程によることができる。先ず、コイル状の線材を所定長さに切断して図１（Ｂ）の如く直線に形成し、次いで、（Ｃ）（Ｄ）の如く、一端部を大径に圧造し、さらにその端部を圧造してフランジ状の頭部３を形成する。次いで、軸線方向にプレス成形して頭部外周に（Ｅ）の如くローレット加工部７を形成する。その後、（Ａ）の如く、環状溝６および外ネジ４ａを形成することができる。このような製造方法をとることにより、環状突部５の高さ（厚み）を大きくすることができ、環状突部５の強度を大きくすることができる。そして、環状突部５を大きくすることにより、植設される板材１が硬い材質であっても本スタッドボルトを有効に取付けることができる。   For example, the stud bolt 11 can be manufactured by the following process. First, a coiled wire is cut into a predetermined length and formed into a straight line as shown in FIG. 1 (B), and then one end is forged to a large diameter as shown in (C) and (D). To form a flange-shaped head 3. Next, the knurled portion 7 is formed on the outer periphery of the head as shown in FIG. Thereafter, as shown in (A), the annular groove 6 and the external screw 4a can be formed. By taking such a manufacturing method, the height (thickness) of the annular protrusion 5 can be increased, and the strength of the annular protrusion 5 can be increased. And by making the annular protrusion 5 large, even if the plate material 1 to be planted is a hard material, the present stud bolt can be attached effectively.

次に、図３（Ａ）は本発明のスタッドボルトの第２の実施の形態を示し、同（Ｂ）〜（Ｅ）はその製造工程の一例を示す。このスタッドボルト11が前記図１のそれと異なる点は環状突部５の形状である。この例では環状突部５の高さが短く且つその縦断面が三角形に形成されている。また、図４は本発明のスタッドボルト11の第３の実施の形態を示し、この環状突部５の縦断面は直角三角状である。   Next, FIG. 3A shows a second embodiment of the stud bolt of the present invention, and FIGS. 3B to 3E show an example of the manufacturing process. The stud bolt 11 is different from that of FIG. 1 in the shape of the annular protrusion 5. In this example, the height of the annular protrusion 5 is short and the longitudinal section thereof is formed in a triangle. FIG. 4 shows a third embodiment of the stud bolt 11 of the present invention, and the longitudinal section of the annular projection 5 is a right triangle.

このような、スタッドボルトを製造するには一例として次の工程によることができる。 先ず、図３（Ｂ）（Ｃ）の如く、所定長さに切断した軸部４の一端にフランジ状の頭部３を形成し、次いで、フランジ状の頭部３の外周をプレス等により打ち抜き、（Ｄ）の如く、夫々鋭角のローレット加工面を形成する。次に（Ｅ）に示す如く、相互に平行移動する一対の金型13の転造等の手段により、環状溝６と、この環状溝６部分の材料の押出により形成された環状突部５と、外ネジ４ａとが同時に形成され、スタッドボルト11を完成する。   For example, the following process can be used to manufacture such a stud bolt. First, as shown in FIGS. 3B and 3C, a flange-shaped head 3 is formed at one end of the shaft 4 cut to a predetermined length, and then the outer periphery of the flange-shaped head 3 is punched out by a press or the like. , (D) respectively, acute knurled surfaces are formed. Next, as shown in (E), the annular groove 6 and the annular protrusion 5 formed by extruding the material of the annular groove 6 portion by means such as rolling of a pair of molds 13 that move in parallel with each other, The external screw 4a is formed simultaneously to complete the stud bolt 11.

作用Action

このようにしてなる本発明の第１のスタッドボルト11は、図２（Ａ）の如く、板材１の孔２にその軸部４が挿通され、頭部３が軸部４の孔縁部に載置される。なお、この板材１は円筒形の支持体８（下型）により支持されている。このような状態で、油圧プレス等により頭部３を上方から下方に押し込む。すると、同図（Ｂ）を経て同図（Ｃ）の如く、頭部３が板材１内に埋設される。この過程において、同図（Ｂ）のように頭部３が板材１に半分程度圧入されたとき、その圧入に伴う塑性変形部は、環状溝６内に進入する。   As shown in FIG. 2A, the first stud bolt 11 of the present invention thus constructed has its shaft portion 4 inserted into the hole 2 of the plate 1 and the head portion 3 at the hole edge of the shaft portion 4. Placed. The plate 1 is supported by a cylindrical support 8 (lower mold). In this state, the head 3 is pushed downward from above with a hydraulic press or the like. Then, the head 3 is embedded in the plate 1 as shown in FIG. In this process, when the head 3 is press-fitted into the plate 1 about half as shown in FIG. 5B, the plastically deformed portion accompanying the press-fit enters the annular groove 6.

このとき環状突部５の外周と孔２の内周との隙間は極めて僅かであるため、孔縁の塑性変形部がその隙間に進入することはない。さらに頭部３を同図（Ｃ）の如く圧入すると、それに伴う変形部12が環状溝６内に完全に進入し、スタッドボルト11は板材１に強固に保持される。なお、頭部３の外周に形成されたローレット加工面７によって本ボルトは回り止めされる。次いで、支持体８を外すことにより、スタッドボルト11の軸部４が板材１の下面側に植設される。
次に、本発明の第２のスタッドボルトは、図５（Ａ）（Ｂ）の如く順に圧入され、図２の場合と略同様に作用する。さらに、第３のスタッドボルトも同様に作用する。 At this time, since the gap between the outer periphery of the annular protrusion 5 and the inner periphery of the hole 2 is very small, the plastic deformation part at the hole edge does not enter the gap. Further, when the head 3 is press-fitted as shown in FIG. 3C, the deformed portion 12 accompanying the head 3 completely enters the annular groove 6, and the stud bolt 11 is firmly held by the plate material 1. The bolt is prevented from rotating by the knurled surface 7 formed on the outer periphery of the head 3. Next, by removing the support body 8, the shaft portion 4 of the stud bolt 11 is implanted on the lower surface side of the plate material 1.
Next, the second stud bolt of the present invention is press-fitted in order as shown in FIGS. 5A and 5B, and operates in substantially the same manner as in FIG. Further, the third stud bolt operates in the same manner.

本発明のプレス型のスタッドボルトであって、（Ａ）は正面略図、（Ｂ）〜（Ｅ）は夫々その製造工程の手順を示す説明図。BRIEF DESCRIPTION OF THE DRAWINGS It is a press type stud bolt of this invention, Comprising: (A) is front schematic, (B)-(E) is explanatory drawing which shows the procedure of the manufacturing process, respectively. 本発明のスタッドボルト11の作用を示す説明図。Explanatory drawing which shows the effect | action of the stud bolt 11 of this invention. 本発明のプレス型の他のスタッドボルトであって、（Ａ）は正面略図、（Ｂ）〜（Ｅ）は夫々その製造工程の手順を示す説明図。It is another stud bolt of the press type | mold of this invention, Comprising: (A) is front schematic, (B)-(E) is explanatory drawing which shows the procedure of the manufacturing process, respectively.

本発明のプレス型のさらに他のスタッドボルトの正面略図。The front schematic diagram of the further another stud bolt of the press type | mold of this invention. 図３のスタッドボルト11の作用を示す説明図。Explanatory drawing which shows the effect | action of the stud bolt 11 of FIG. 従来型のスタッドボルト11の作用を示す説明図。Explanatory drawing which shows the effect | action of the conventional stud bolt 11. FIG.

符号の説明Explanation of symbols

１ 板材
２ 孔
３ 頭部
４ 軸部
４ａ 外ネジ
５ 環状突部
６ 環状溝 DESCRIPTION OF SYMBOLS 1 Board | plate material 2 Hole 3 Head 4 Shaft part 4a External screw 5 Annular protrusion 6 Annular groove

７ ローレット加工面
８ 支持体
10 環状凹部
11 スタッドボルト
12 変形部
13 金型
7 Knurled surface 8 Support
10 Annular recess
11 Stud bolt
12 Deformation part
13 Mold

Claims (1)

板材(1) の孔(2) の一方側から、フランジ状の頭部(3) が圧入埋設されて、その軸部(4)が板材(1) の他方側に植設されるスタッドボルトにおいて、
前記頭部(3) に近接して、軸部(4) の外ネジ(4a)の山部外径に等しい外径の環状突部(5) が前記軸部(4) に一体に形成され、
その環状突部(5) と前記頭部(3) との間に環状溝(6) が形成され、
その環状溝(6)の全容積は、頭部(3) が板材(1) に前記圧入埋設されたとき、板材(1) の孔縁部の材料が押し出される体積に等しいか、ややそれより大きい体積とされ、それにより、前記頭部(3) の前記板材(1) への圧入埋設過程で前記環状突部(5) により、前記板材(1) の前記孔(2) の縁部の塑性変形部が、主として前記環状溝(6) にのみ進入するように構成したことを特徴とするプレス型のスタッドボルト。 In the stud bolt in which the flange-shaped head (3) is press-fitted from one side of the hole (2) of the plate (1) and its shaft (4) is implanted on the other side of the plate (1) ,
An annular protrusion (5) having an outer diameter equal to the outer diameter of the crest of the outer screw (4a) of the shaft portion (4) is formed integrally with the shaft portion (4) in the vicinity of the head portion (3). ,
An annular groove (6) is formed between the annular protrusion (5) and the head (3),
The total volume of the annular groove (6) is equal to or slightly larger than the volume of the material at the hole edge of the plate (1) when the head (3) is press-fitted and embedded in the plate (1). The volume of the hole (2) of the plate (1) is increased by the annular protrusion (5) during the press-fitting process of the head (3) into the plate (1). A press-type stud bolt , wherein the plastically deformed portion is configured to enter mainly into the annular groove (6) .
JP2004215841A 2004-07-23 2004-07-23 Pressed stud bolt Active JP4463032B2 (en)

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JP5216679B2 (en) * 2009-04-23 2013-06-19 株式会社日立製作所 Elevator car operation panel and elevator device
JP5567898B2 (en) * 2010-05-18 2014-08-06 福井鋲螺株式会社 Stud bolt and method for manufacturing stud bolt
CN106438640A (en) * 2016-08-30 2017-02-22 丰业迪睦斯（芜湖）汽车部件有限公司 Press fitting bolt structure of limiting stopper

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