JP4072957B2 - Method of fixing antenna element and antenna element fixed to arm - Google Patents

Method of fixing antenna element and antenna element fixed to arm Download PDF

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Publication number
JP4072957B2
JP4072957B2 JP2003163072A JP2003163072A JP4072957B2 JP 4072957 B2 JP4072957 B2 JP 4072957B2 JP 2003163072 A JP2003163072 A JP 2003163072A JP 2003163072 A JP2003163072 A JP 2003163072A JP 4072957 B2 JP4072957 B2 JP 4072957B2
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Japan
Prior art keywords
arm
antenna element
insertion hole
fixed
concave groove
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JP2003163072A
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Japanese (ja)
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JP2004364202A (en
JP2004364202A5 (en
Inventor
敏明 城阪
茂 上野
敏夫 藤田
仁志 長野
昭博 藤本
義之 板坂
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Dxアンテナ株式会社
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Priority to JP2003163072A priority Critical patent/JP4072957B2/en
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Publication of JP2004364202A5 publication Critical patent/JP2004364202A5/ja
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Description

【0001】
【発明の属する技術分野】
本発明は、アンテナ素子の固定方法とアームに固定されたアンテナ素子に関するものである。
【0002】
【従来の技術】
従来のアンテナ素子をアームに固定する方法を、図8により説明する。
【0003】
アーム101の挿通孔102にアンテナ素子103を挿通させた後、アーム101内壁とアーム101の内側のアンテナ素子103との間隙に、この間隙より大きい断面の矢を、上下同時に通して図示のようにアンテナ素子103を変形させている。
【0004】
アンテナ素子103を矢により上下方向に潰した時にアンテナ素子103の断面は横方向に拡がり楕円形状となり、拡がった部分が挿通孔102に当接し、又アーム101内部のアンテナ素子103も拡がるため、アンテナ素子103がアーム101の左右方向にズレ抜けることはなく、アンテナ素子103がアーム101に固定される。
【0005】
また、本出願人は、既に特願2002−205185「アンテナ素子の固定方法とアームに固定されたアンテナ素子」、特願2003−123039「アンテナ素子の固定方法とアームに固定されたアンテナ素子」を出願している。これは例えば、図9に示すように、アーム1の挿通孔2にアンテナ素子3を挿通させ、アーム1にアンテナ素子3を直角状に固定するアンテナ素子3の固定方法であって、アンテナ素子3が挿通孔2に挿通され、アーム1と当接する挿通孔2の近傍をプレス加工して挿通孔2を変形させてアンテナ素子3とアーム1とを接触・固定させるようにしたアンテナ素子の固定方法である。プレス加工による加圧箇所は符号11、12で示すアーム1の近傍の円弧部分で、円弧状のキズが発生している。
【0006】
これは、矢を用いることなく、プレス加工により、挿通孔2近傍のアーム1をプレス加工し、挿通孔2を変形させて接触・固定させるようにしたものである。
【0007】
【発明が解決しようとする課題】
上記の従来のアンテナ素子103をアーム101に固定する方法の欠点としては、アーム101内壁とアーム101の内側のアンテナ素子103との間隙に矢を通す手間と、又、矢を引き抜く時にアンテナ素子103の折損を無くするため、潤滑のために多量の油が必要で、カシメた後、アーム101内部の油分を取り除く酸洗等の脱脂工程が必要である。
【0008】
また、アーム1と当接する挿通孔2の近傍をプレス加工して挿通孔2を変形させて固定させる固定方法では、アーム1の断面が真円で加圧箇所にキズが発生する。キズの発生を無くして挿通孔2を縮小させようとすると、アンテナ素子3以外の部分でシワが発生する等の欠点があった。
【0009】
【課題を解決するための手段】
そこで、本発明は、上記の事情に鑑み、矢を通す手間と油分を取り除く工程を省略してコストダウンを図り、また、アームにキズやシワを発生させることなく、アンテナ素子とアームとを接触・固定させるべく、アームの挿通孔にアンテナ素子を挿通させ、アームにアンテナ素子を直角状に固定するアンテナ素子の固定方法であって、アームの対向した箇所の長手方向に凹溝を刻設し、凹溝の箇所に挿通孔を穿設し、アームの挿通孔にアンテナ素子を挿入させ、凹溝が閉じる方向にアームをプレス加工して挿通孔を変形させてアンテナ素子とアームとを接触・固定させるようにしたアンテナ素子の固定方法とした。
【0010】
また、本発明は、具体的には凹溝がV字型凹溝である。
【0011】
さらに、本発明は、具体的には凹溝がコ字型凹溝である。
【0012】
さらにまた、本発明は、上記の方法により製作されたアームに固定されたアンテナ素子である。
【0013】
【発明の実施の態様】
本発明を添付する図面に示す具体的な実施例に基づいて、以下詳細に説明する。
【0014】
本発明は、図1に示すように、アーム1の挿通孔2にアンテナ素子3を挿通させ、アーム1にアンテナ素子3を直角状に固定するアンテナ素子3の固定方法であって、アーム1の対向した箇所の長手方向に凹溝を刻設し、凹溝の箇所に挿通孔2を穿設し、アーム1の挿通孔2にアンテ素子3を挿入させ、凹溝が閉じる方向にアーム1をプレス加工して挿通孔2を変形させてアンテナ素子3とアーム1とを接触・固定させるようにしたアンテナ素子の固定方法である。
【0015】
本発明では、矢を用いることなく、プレス加工により、挿通孔2近傍のアーム1をプレス加工し、挿通孔2を変形させて接触・固定させるようにしたものである。
【0016】
また、本発明では、アーム1にキズやシワを発生させることなく、アンテナ素子3とアーム1とを接触・固定させるものである。
【0017】
先ず、図2・図3に示すものは、例えば、プレス加工が外径22mmの円筒体のアルミ製アーム1の孔径8.1mmの挿通孔2に、外径8mmのアルミ製アンテナ素子3を挿通し、アーム1をプレス加工して挿通孔2を変形させてアンテナ素子3とアーム1とを接触・固定させる。
【0018】
本発明では、図3に示すように、アーム1には対向した箇所の長手方向に凹溝21を刻設し、凹溝21の箇所に挿通孔2を穿設する。
【0019】
アーム1の中心軸Cを通る直線と周壁との交差箇所(対向した箇所)に凹溝21を刻設する。また、凹溝21はアーム1の長手方向の全長にわたり刻設する。凹溝21として図2Aに示すV字型凹溝21a、図2Bに示すコ型凹溝21b、図2Cに示すV字型凹溝21cがある。
【0020】
挿通孔2は、アーム1の長手方向の所要間隔を隔てた位置に穿設する。凹溝21の幅Wは挿通孔2の直径より小さく形成する。
【0021】
図2AのV字型凹溝21aの箇所に挿通孔2をドリルにより穿設する際、対面出口側でドリルが突部に当たりドリルの芯ぶれが起こりやすいので、図2Bに示すコ型凹溝21bに形成しておくと、コ型凹溝21bの箇所に挿通孔2をドリルにより穿設する際、対面出口側でドリルが平面部に当たりドリルは芯ぶれを起こすようなことはなく、挿通孔2の孔開けが正確且つ容易にでき、図2Cに示すV字型凹溝21cであっても対面出口側でドリルは略平面部に当たりドリルは芯ぶれを起こすようなことはなく、挿通孔2の孔開けが正確且つ容易にできる。
【0022】
図4〜図7によりアーム1の挿通孔2にアンテナ素子3を挿通させ、アーム1にアンテナ素子3を直角状に固定するアンテナ素子の固定方法について説明する。
【0023】
図4はアーム1の挿通孔2にアンテナ素子3を挿入しプレス加工前の状態で、アーム1の直径はLで、アンテナ素子3の直径はDである。
【0024】
図5は前記のアンテナ素子3を装着したアーム1を金型22の下型22a上に載置し、アーム1上に上型22bを載置し、下型22aの上面と上型22bの下面とが隔たった状態である。
【0025】
図6は下型22aの上面と上型22bの下面とが当接し、凹溝21が閉じる方向にプレス加工し、挿通孔2を変形させてアンテナ素子3とアーム1とを接触・固定させた状態である。挿通孔2は上下方向で孔径が縮まりアンテナ素子3に食い込んでいき、凹溝21の幅Wは狭くなる。
【0026】
図7はアーム1にアンテナ素子3が接続・固定された完成品の状態で、アーム1の直径はL’となり、プレス加工前の直径Lより減少している。
【0027】
本発明では、アンテナ素子の折損等のおそれがなく、油分を必要としないので、加工工程による油分の付着がなく、脱脂工程が簡単でよい。
【0028】
また、本発明では、アーム1にキズやシワを発生させることなく、アンテナ素子3とアーム1とを接触・固定させるものである。
【0029】
本発明は、上記の方法により製作したアーム1に固定されたアンテナ素子3で図1に示すように、八木形アンテナを構成し、テレビ電波を受信するアンテナとして使用される。
【0030】
【発明の効果】
本発明は、上述のように、アームの挿通孔にアンテナ素子を挿通させ、アームにアンテナ素子を直角状に固定するアンテナ素子の固定方法であって、アームの対向した箇所の長手方向に凹溝を刻設し、凹溝の箇所に挿通孔を穿設し、アームの挿通孔にアンテナ素子を挿入させ、凹溝が閉じる方向にアームをプレス加工して挿通孔を変形させてアンテナ素子とアームとを接触・固定させるようにしたアンテナ素子の固定方法であるので、矢を通す手間と油分を除く工程を省略してコストダウンが図ることができる。
【0031】
本発明では、アームにキズやシワを発生させることなく、アンテナ素子とアームとを接触・固定させるものである。
【0032】
また、本発明は、具体的には、凹溝がV字型溝である。
【0033】
さらに、本発明では、具体的には凹溝がコ字型溝である。
【0034】
さらにまた、本発明は、上記の方法により製作されたアームに固定されたアンテナ素子である。
【図面の簡単な説明】
【図1】本発明の方法により製作されたアームに固定されたアンテナ素子を用いたアンテナの二面の斜視図である。
【図2】本発明のアームの凹溝の形状を異ならせた各断面図の三面図である。
【図3】本発明のアームの側面図である。
【図4】本発明のアームの挿通孔にアンテナ素子を挿入したプレス加工前の正面図と、断面図との二面図である。
【図5】本発明のアンテナ素子を装着したアームを金型の下型上に載置し、アーム上に上型を載置し、下型の上面と上型の下面とが隔たった状態の正面図と断面図との二面図である。
【図6】本発明の下型の上面と上型の下面とが当接し凹溝が閉じる方向にプレス加工し、挿通孔を変形させてアンテナ素子とアームとを接触・固定させた状態の正面図と断面図との二面図である。
【図7】本発明のアームにアンテナ素子が接続・固定された完成品の状態の正面図と断面図との二面図である。
【図8】従来のアームの挿通孔にアンテナ素子を挿通し抜け外れないように矢で加工した状態の正面図と側面図との二面図である。
【図9】本出願人が既に出願したものの、アームの挿通孔の近傍の上下を加圧してアームにアンテナ素子を組付けた状態を示すアーム部断面の正面図と側面図の二面図である。
【符号の説明】
1…アーム
2…挿通孔
3…アンテナ素子
21…凹溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna element fixing method and an antenna element fixed to an arm.
[0002]
[Prior art]
A conventional method of fixing the antenna element to the arm will be described with reference to FIG .
[0003]
After the antenna element 103 is inserted into the insertion hole 102 of the arm 101, an arrow having a cross section larger than this gap is simultaneously passed through the gap between the inner wall of the arm 101 and the antenna element 103 inside the arm 101 as shown in the figure. The antenna element 103 is deformed.
[0004]
When the antenna element 103 is crushed in the vertical direction by an arrow, the cross section of the antenna element 103 expands in the horizontal direction to become an elliptical shape, the expanded portion contacts the insertion hole 102, and the antenna element 103 in the arm 101 also expands. The element 103 is not displaced in the left-right direction of the arm 101, and the antenna element 103 is fixed to the arm 101.
[0005]
Further, the present applicant has already filed Japanese Patent Application No. 2002-205185 “Antenna Element Fixing Method and Antenna Element Fixed to the Arm” and Japanese Patent Application No. 2003-123039 “Antenna Element Fixing Method and Antenna Element Fixed to the Arm”. I have applied. For example, as shown in FIG. 9 , the antenna element 3 is inserted into the insertion hole 2 of the arm 1 and the antenna element 3 is fixed to the arm 1 at a right angle. Is inserted into the insertion hole 2, and the vicinity of the insertion hole 2 in contact with the arm 1 is pressed to deform the insertion hole 2 so that the antenna element 3 and the arm 1 are contacted and fixed. It is. The pressurized portion by press working is an arc portion in the vicinity of the arm 1 indicated by reference numerals 11 and 12, and arc-shaped scratches are generated.
[0006]
In this case, the arm 1 near the insertion hole 2 is pressed by pressing without using an arrow, and the insertion hole 2 is deformed to be contacted and fixed.
[0007]
[Problems to be solved by the invention]
Disadvantages of the above-described conventional method of fixing the antenna element 103 to the arm 101 include the trouble of passing an arrow through the gap between the inner wall of the arm 101 and the antenna element 103 inside the arm 101, and the antenna element 103 when pulling out the arrow. Therefore, a large amount of oil is necessary for lubrication, and after the caulking, a degreasing process such as pickling to remove the oil in the arm 101 is necessary.
[0008]
Further, in the fixing method in which the vicinity of the insertion hole 2 in contact with the arm 1 is pressed and the insertion hole 2 is deformed and fixed, the cross section of the arm 1 is a perfect circle and a scratch is generated at the pressurization location. If an attempt was made to reduce the insertion hole 2 without generating scratches, there was a drawback that wrinkles would occur at portions other than the antenna element 3.
[0009]
[Means for Solving the Problems]
Therefore, in view of the above circumstances, the present invention eliminates the labor of passing an arrow and the step of removing the oil component to reduce the cost. Further, the antenna element is brought into contact with the arm without causing scratches or wrinkles on the arm. In order to fix the antenna element, the antenna element is inserted into the insertion hole of the arm and the antenna element is fixed to the arm at a right angle, and a concave groove is engraved in the longitudinal direction of the opposite part of the arm. The insertion hole is drilled in the concave groove, the antenna element is inserted into the insertion hole of the arm, the arm is pressed in the direction in which the concave groove is closed to deform the insertion hole, and the antenna element and the arm are contacted. The antenna element fixing method was fixed.
[0010]
In the present invention, specifically, the groove is a V-shaped groove.
[0011]
Furthermore, in the present invention, specifically, the concave groove is a U-shaped concave groove.
[0012]
Furthermore, the present invention is an antenna element fixed to an arm manufactured by the above method.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.
[0014]
As shown in FIG. 1, the present invention is a method of fixing an antenna element 3 in which an antenna element 3 is inserted into an insertion hole 2 of an arm 1 and the antenna element 3 is fixed to the arm 1 at a right angle. Concave grooves are formed in the longitudinal direction of the opposed portions, insertion holes 2 are formed in the concave groove portions, the antenna element 3 is inserted into the insertion holes 2 of the arm 1, and the arm 1 is moved in the direction in which the concave grooves are closed. This is an antenna element fixing method in which the insertion element 2 is deformed by pressing so as to contact and fix the antenna element 3 and the arm 1.
[0015]
In the present invention, the arm 1 in the vicinity of the insertion hole 2 is pressed by pressing without using an arrow, and the insertion hole 2 is deformed to be contacted and fixed.
[0016]
In the present invention, the antenna element 3 and the arm 1 are contacted and fixed without causing scratches or wrinkles in the arm 1.
[0017]
2 and 3 show, for example, that an aluminum antenna element 3 having an outer diameter of 8 mm is inserted into an insertion hole 2 having a hole diameter of 8.1 mm in a cylindrical aluminum arm 1 having a pressing diameter of 22 mm. Then, the arm 1 is pressed to deform the insertion hole 2 so that the antenna element 3 and the arm 1 are contacted and fixed.
[0018]
In the present invention, as shown in FIG. 3, the arm 1 is provided with a concave groove 21 in the longitudinal direction of the opposed portion, and an insertion hole 2 is formed in the concave groove 21.
[0019]
A concave groove 21 is formed at the intersection (opposed portion) between the straight line passing through the central axis C of the arm 1 and the peripheral wall. The concave groove 21 is engraved over the entire length of the arm 1 in the longitudinal direction. The concave groove 21 includes a V-shaped concave groove 21a shown in FIG. 2A, a U-shaped concave groove 21b shown in FIG. 2B, and a V-shaped concave groove 21c shown in FIG. 2C.
[0020]
The insertion hole 2 is drilled at a position spaced apart from the arm 1 in the longitudinal direction. The width W of the concave groove 21 is formed smaller than the diameter of the insertion hole 2.
[0021]
When the insertion hole 2 is drilled at the location of the V-shaped concave groove 21a in FIG. 2A by the drill, the drill hits the projection on the facing exit side, and the core of the drill tends to run out. Therefore, the U-shaped concave groove 21b shown in FIG. 2B When the insertion hole 2 is drilled at the location of the U-shaped concave groove 21b by the drill, the drill does not hit the flat surface portion on the facing exit side and the drill does not cause a runout, and the insertion hole 2 2C can be accurately and easily made, and even with the V-shaped concave groove 21c shown in FIG. 2C, the drill hits a substantially flat portion on the facing exit side, and the drill does not cause a runout. Drilling can be performed accurately and easily.
[0022]
The antenna element fixing method in which the antenna element 3 is inserted into the insertion hole 2 of the arm 1 and the antenna element 3 is fixed to the arm 1 at right angles will be described with reference to FIGS.
[0023]
FIG. 4 shows a state before the antenna element 3 is inserted into the insertion hole 2 of the arm 1 and before press working, and the arm 1 has a diameter L and the antenna element 3 has a diameter D.
[0024]
In FIG. 5, the arm 1 on which the antenna element 3 is mounted is placed on the lower die 22a of the mold 22, the upper die 22b is placed on the arm 1, the upper surface of the lower die 22a and the lower surface of the upper die 22b. Is in a state of being separated from each other.
[0025]
In FIG. 6, the upper surface of the lower mold 22 a and the lower surface of the upper mold 22 b are in contact with each other, the concave groove 21 is pressed in the closing direction, the insertion hole 2 is deformed, and the antenna element 3 and the arm 1 are contacted and fixed. State. The hole diameter of the insertion hole 2 decreases in the vertical direction and bites into the antenna element 3, and the width W of the concave groove 21 becomes narrower.
[0026]
FIG. 7 shows a completed product in which the antenna element 3 is connected and fixed to the arm 1. The arm 1 has a diameter L ′, which is smaller than the diameter L before press working.
[0027]
In the present invention, there is no fear of breakage of the antenna element, and no oil is required, so there is no adhesion of oil due to the processing step, and the degreasing step may be simple.
[0028]
In the present invention, the antenna element 3 and the arm 1 are contacted and fixed without causing scratches or wrinkles in the arm 1.
[0029]
In the present invention, as shown in FIG. 1, the antenna element 3 fixed to the arm 1 manufactured by the above method constitutes a Yagi antenna and is used as an antenna for receiving TV radio waves.
[0030]
【The invention's effect】
As described above, the present invention is a method for fixing an antenna element in which an antenna element is inserted into an insertion hole of an arm and the antenna element is fixed to the arm at a right angle. The antenna element and the arm are formed by forming an insertion hole in the concave groove, inserting the antenna element into the arm insertion hole, and pressing the arm in a direction in which the concave groove is closed to deform the insertion hole. Therefore, it is possible to reduce the cost by omitting the trouble of passing the arrow and the step of removing the oil component.
[0031]
In the present invention, the antenna element and the arm are brought into contact and fixed without causing scratches or wrinkles on the arm.
[0032]
In the present invention, specifically, the concave groove is a V-shaped groove.
[0033]
Furthermore, in the present invention, specifically, the concave groove is a U-shaped groove.
[0034]
Furthermore, the present invention is an antenna element fixed to an arm manufactured by the above method.
[Brief description of the drawings]
FIG. 1 is a perspective view of two surfaces of an antenna using an antenna element fixed to an arm manufactured by the method of the present invention.
FIG. 2 is a trihedral view of each cross-sectional view in which the shape of the groove of the arm of the present invention is changed.
FIG. 3 is a side view of the arm of the present invention.
FIG. 4 is a two-view diagram of a front view and a cross-sectional view before pressing, in which an antenna element is inserted into the insertion hole of the arm of the present invention.
FIG. 5 shows an arm mounted with the antenna element of the present invention placed on a lower mold of the mold, an upper mold placed on the arm, and the upper surface of the lower mold separated from the lower surface of the upper mold. It is a two-view figure with a front view and sectional drawing.
FIG. 6 is a front view showing a state where the upper surface of the lower mold and the lower surface of the upper mold of the present invention are in contact with each other and pressed into a direction in which the concave groove is closed and the insertion hole is deformed to contact and fix the antenna element and the arm. It is a double view of a figure and sectional drawing.
FIG. 7 is a two-view diagram of a front view and a sectional view of a finished product in which an antenna element is connected and fixed to the arm of the present invention.
FIG. 8 is a two-side view of a state in which an antenna element is inserted into an insertion hole of a conventional arm and processed with an arrow so as not to be removed.
FIG. 9 is a front view of a cross section of an arm portion and a side view showing a state in which an antenna element is assembled to an arm by applying pressure on the upper and lower portions in the vicinity of the arm insertion hole, which has already been filed by the present applicant. is there.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Arm 2 ... Insertion hole 3 ... Antenna element 21 ... Concave groove

Claims (4)

アームの挿通孔にアンテナ素子を挿通させ、アームにアンテナ素子を直角状に固定するアンテナ素子の固定方法であって、アームの対向した箇所の長手方向に凹溝を刻設し、凹溝の箇所に挿通孔を穿設し、アームの挿通孔にアンテナ素子を挿入させ、凹溝が閉じる方向にアームをプレス加工して挿通孔を変形させてアンテナ素子とアームとを接触・固定させるようにしたアンテナ素子の固定方法。An antenna element fixing method in which an antenna element is inserted into an insertion hole of an arm and the antenna element is fixed to the arm at a right angle, and a groove is engraved in the longitudinal direction of the opposite part of the arm. The antenna element is inserted into the arm insertion hole, the arm is pressed in the direction in which the groove is closed, and the insertion hole is deformed to contact and fix the antenna element and the arm. Fixing method of antenna element. 凹溝がV字型凹溝である請求項1記載のアンテナ素子の固定方法。2. The method for fixing an antenna element according to claim 1, wherein the groove is a V-shaped groove. 凹溝がコ字型凹溝である請求項1記載のアンテナ素子の固定方法。The antenna element fixing method according to claim 1, wherein the concave groove is a U-shaped concave groove. 請求項1の方法により製作されたアームに固定されたアンテナ素子。The antenna element fixed to the arm manufactured by the method of Claim 1.
JP2003163072A 2003-06-09 2003-06-09 Method of fixing antenna element and antenna element fixed to arm Expired - Fee Related JP4072957B2 (en)

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JP2004364202A5 JP2004364202A5 (en) 2006-06-29
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JP4495035B2 (en) * 2005-06-03 2010-06-30 マスプロ電工株式会社 Antenna and manufacturing method thereof

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