JP2007170552A - Tapping screw - Google Patents

Tapping screw Download PDF

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Publication number
JP2007170552A
JP2007170552A JP2005369855A JP2005369855A JP2007170552A JP 2007170552 A JP2007170552 A JP 2007170552A JP 2005369855 A JP2005369855 A JP 2005369855A JP 2005369855 A JP2005369855 A JP 2005369855A JP 2007170552 A JP2007170552 A JP 2007170552A
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tapping screw
board
thread
tip
cutting blade
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JP2005369855A
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JP4727415B2 (en
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Takashi Kiyama
隆 木山
Tsutomu Kashiwakura
勤 柏倉
Toshiaki Yasuda
利晃 安田
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Wakai and Co Ltd
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Wakai and Co Ltd
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  • Finishing Walls (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tapping screw capable of being smoothly screwed into even to a wall backing material made of a thin steel sheet. <P>SOLUTION: A screw thread 4 is provided at the outer periphery of a straight shaft 1. A lead-in cutting edge 5 having triangular cross section is formed at the outer periphery of a tip part of a circular cone-shaped part 2 provided at a tip of the straight shaft 1 to increase biting property of the tapping screw for the wall backing material 10 made of the thin steel sheet so that the tapping screw is smoothly screwed into the wall backing material 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、石膏ボード等のボード類を固定する際に用いられるタッピングねじに関するものである。   The present invention relates to a tapping screw used when fixing boards such as a gypsum board.

薄鋼板からなるチャンネル材を用いて壁下地を形成し、その壁下地に石膏ボード等のボード類(以下、単にボードという)を取付けて間仕切り壁や外壁等の壁面を形成することは、一般的に行われている。   It is common to form a wall base using a channel material made of thin steel plate, and to attach a board such as gypsum board (hereinafter simply referred to as a board) to the wall base to form a wall such as a partition wall or an outer wall. Has been done.

上記ボードの取付けに際して、普通、タッピングねじが使用される。   A tapping screw is usually used for mounting the board.

ところで、従来から知られているタッピングねじは、先端が円錐形とされた断面丸形のストレート軸の外周に螺旋状のねじ山を形成した構成であって、先端の円錐形部にねじ山が存在しないため、そのタッピングねじがボードを貫通して薄鋼板からなるチャンネル材にねじ込まれる際の食い付きが悪く、ボードを能率よくねじ止めすることができないという不都合があった。   By the way, the tapping screw conventionally known has a configuration in which a spiral screw thread is formed on the outer periphery of a straight shaft having a circular cross section whose tip is conical, and the screw thread is formed in the conical portion of the tip. Since it does not exist, the tapping screw penetrates the board and is not easily bitten when screwed into a channel material made of a thin steel plate, and the board cannot be screwed efficiently.

また、チャンネル材にタッピングねじがスムーズにねじ込まれないために、ボードが壁下地より離反し、壁下地とボードとの間に隙間が形成される場合があった。   In addition, since the tapping screw is not screwed into the channel material smoothly, the board may be separated from the wall base and a gap may be formed between the wall base and the board.

この発明の課題は、薄鋼板からなる壁下地に対してもスムーズにねじ込むことができるようにしたタッピングねじを提供することである。   An object of the present invention is to provide a tapping screw that can be smoothly screwed into a wall base made of a thin steel plate.

上記の課題を解決するため、この発明においては、先端に円錐形部を有し、後端に頭部が形成された断面丸形のストレート軸の外周に螺旋状のねじ山を形成したタッピングねじにおいて、前記円錐形部の先端部外周に、前記ねじ山と同方向に捩じれる断面三角形の切込み刃を形成した構成を採用したのである。   In order to solve the above problems, in the present invention, a tapping screw having a conical portion at the tip and a spiral thread formed on the outer periphery of a straight shaft having a round cross section with a head formed at the rear end. Therefore, a configuration is adopted in which a cutting blade having a triangular cross section that is twisted in the same direction as the thread is formed on the outer periphery of the tip of the conical portion.

ここで、前記切込み刃のねじれ角を前記ねじ山のねじれ角より大きくしておくことによって、その切込み刃が壁下地にねじ込まれる際のねじ込み量は、ねじ山がボードにねじ込まれる際のねじ込み量より大きいため、ボードを壁下地に押付けることができ、壁下地にボードが密着する体裁の良好な取付け状態を得ることができる。   Here, by setting the twist angle of the cutting blade to be larger than the twist angle of the screw thread, the screwing amount when the cutting blade is screwed into the wall substrate is the screwing amount when the screw thread is screwed into the board. Since it is larger, the board can be pressed against the wall base, and a good attachment state in which the board is in close contact with the wall base can be obtained.

また、切込み刃とねじ山の先端間に、ねじ山のねじれ角よりねじれの大きい断面三角形の一対のねじれ突起を対向位置に設けておくと、ボードに対するタッピングねじの初期のねじ込み時、一対のねじれ突起は、ドリルの役目をしてボード表面を座ぐりし、その座ぐりによってボード表面に盛り上がりが生じるという不都合の発生はなく、その座ぐり内にタッピングねじの頭部が納まるため、ボード上にクロスを貼る際に、クロスをきれいに貼ることができる。   In addition, if a pair of twisted protrusions with a triangular cross section with a larger twist than the twist angle of the thread is provided at the opposing position between the cutting blade and the tip of the thread, the pair of twists is twisted when the tapping screw is screwed into the board at the initial stage. The protrusions act as a drill to counter the surface of the board, and there is no inconvenience that the counterbore swells on the surface of the board, and the head of the tapping screw fits in the counterbore. When pasting the cloth, you can paste the cloth neatly.

また、ねじれ突起がボード内を回転しつつ侵入する際に、上記ねじれ突起によりボードの内部組織をせん断して内部を柔らかくすることができ、その柔らかくなった部分にねじ山が侵入することになるため、ボードに対してタッピングねじをスムーズにねじ込むことができる。   Further, when the twisted protrusion enters while rotating in the board, the internal structure of the board can be sheared by the twisted protrusion to soften the inside, and the screw thread enters the softened portion. Therefore, the tapping screw can be smoothly screwed into the board.

上記のように、ストレート軸の先端に形成された円錐形部の先端部外周に、前記ねじ山と同方向に捩じれる断面三角形の切込み刃を形成したことによって、ボードを通過したタッピングねじの先端が薄鋼板からなる壁下地に当接すると、上記切込み刃がその壁下地を直ちに切り込むため、壁下地に対するタッピングねじの食い付きがよく、壁下地に対してタッピングねじをスムーズにねじ込むことができる。このため、ボードを能率よく取付けることができると共に、壁下地に対してボードが密着する体裁の良好な取付け状態を得ることができる。   As described above, the tip of the tapping screw that has passed through the board is formed on the outer periphery of the tip of the conical portion formed at the tip of the straight shaft by forming a cutting blade having a triangular section that is twisted in the same direction as the thread. Since the cutting blade immediately cuts the wall substrate when it comes into contact with the wall substrate made of a thin steel plate, the tapping screw bites the wall substrate well, and the tapping screw can be smoothly screwed into the wall substrate. For this reason, while being able to attach a board efficiently, the favorable attachment state of the appearance which a board adheres with respect to a wall base can be obtained.

以下、この発明の実施の形態を図面に基いて説明する。図１(Ｉ)に示すように、丸軸からなるストレート軸１の先端には円錐形部２が形成され、後端には頭部３が設けられている。   Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 (I), a conical portion 2 is formed at the tip of a straight shaft 1 made of a round shaft, and a head 3 is provided at the rear end.

なお、頭部３の表面には、ドライバ等のねじ込み用ビットに対する係合部が形成されているが、図では省略している。   In addition, although the engaging part with respect to screwing bits, such as a driver, is formed in the surface of the head 3, it is abbreviate | omitting in the figure.

ストレート軸１の外周には、先端から後端に向けて螺旋状のねじ山４が形成されている。一方、円錐形部２の先端部外周には、図１(II)に示すように、断面三角形の切込み刃５が設けられ、その切込み刃５と上記ねじ山４の先端間に一対のねじれ突起６が対向位置に形成されている。   On the outer periphery of the straight shaft 1, a spiral thread 4 is formed from the front end toward the rear end. On the other hand, as shown in FIG. 1 (II), a cutting blade 5 having a triangular cross section is provided on the outer periphery of the tip portion of the conical portion 2, and a pair of twisting protrusions is provided between the cutting blade 5 and the tip of the thread 4. 6 is formed in the opposing position.

切込み刃５は、ねじ山４と同方向にねじれ、そのねじれ角はねじ山４のねじれ角より大きくなっている。また、切込み刃５は、その長さ方向の中央部における高さが高く、先端および後端に至るに従って高さが次第に低くなっている。   The cutting blade 5 is twisted in the same direction as the thread 4, and the twist angle thereof is larger than the twist angle of the thread 4. Moreover, the cutting blade 5 has a high height at the center in the length direction, and the height gradually decreases as it reaches the front end and the rear end.

一対のねじれ突起６は断面が三角形とされている。このねじれ突起６は上記ねじ山４と同方向にねじれ、そのねじれ角はねじ山４のねじれ角より大きくなっている。また、ねじれ突起６はその長さ方向の中央部において高さが高く、先端および後端に至るに従って高さが次第に低くなっている。   The pair of twisted protrusions 6 has a triangular cross section. The twisted protrusion 6 is twisted in the same direction as the thread 4, and the twist angle is larger than the twist angle of the thread 4. Further, the height of the twisted protrusion 6 is high at the central portion in the length direction, and the height is gradually lowered toward the front end and the rear end.

実施の形態で示すタッピングねじは上記の構造からなり、図２は、壁下地１０に当接されたボード１１にタッピングねじをねじ込んだ状態を示す。そのねじ込み時、先行する一対のねじれ突起６はドリルの役目をしてボード１１の表面を座ぐりすることになる。   The tapping screw shown in the embodiment has the above structure, and FIG. 2 shows a state in which the tapping screw is screwed into the board 11 in contact with the wall base 10. At the time of the screwing, the preceding pair of twisting protrusions 6 act as a drill to scoop the surface of the board 11.

このため、ボード１１の表面に盛り上がり部が形成されるという不都合の発生はなく、また、タッピングねじのねじ込み完了後は、頭部３が形成された座ぐり内に納まる状態となってボード１１の表面は平坦な状態に保持されることになり、ボード１１の取付け完了後にその表面にクロスを貼る際に、クロスをきれいに貼り付けることができる。   Therefore, there is no inconvenience that a raised portion is formed on the surface of the board 11, and after the screwing of the tapping screw is completed, the head 11 is placed in a counterbore in which the head 3 is formed. The surface is held in a flat state, and when the cloth is pasted on the surface after the board 11 has been attached, the cloth can be neatly pasted.

また、上記一対のねじれ突起６は回転しつつボード１１内に侵入するため、ボード１１の内部組織はねじれ突起６によりせん断されて柔らかくなり、その柔らかくなった部分をねじ山４が侵入するため、ボード１１に対してタッピングねじはスムーズにねじ込まれる。   In addition, since the pair of twisted protrusions 6 enter the board 11 while rotating, the internal structure of the board 11 is sheared and softened by the twisted protrusions 6, and the screw thread 4 enters the softened portion. The tapping screw is smoothly screwed into the board 11.

図２に示すように、タッピングねじの先端がボード１１を貫通すると、円錐形部２の先端が薄鋼板からなる壁下地１０に当接する。このとき、円錐形部２の先端部外周には切込み刃５が形成されているため、タッピングねじのねじ込みが継続されると、その切込み刃５が壁下地１０を切込むことになる。   As shown in FIG. 2, when the tip of the tapping screw penetrates the board 11, the tip of the conical portion 2 comes into contact with the wall substrate 10 made of a thin steel plate. At this time, since the cutting blade 5 is formed on the outer periphery of the tip portion of the conical portion 2, when the screwing of the tapping screw is continued, the cutting blade 5 cuts the wall base 10.

このように、円錐形部２の先端部外周に切込み刃５を形成しておくことによって、壁下地１０に対するタッピングねじの食い付きがよく、その壁下地１０に対してタッピングねじをスムーズにねじ込むことができる。   In this way, by forming the cutting blade 5 on the outer periphery of the tip of the conical portion 2, the tapping screw bites against the wall base 10, and the tapping screw is smoothly screwed into the wall base 10. Can do.

このため、ボード１１を能率よくねじ止めすることができると共に、ボード１１が壁下地１０から浮き上がることがないため、図３に示すように、壁下地１０にボード１１が密着する体裁の良好な取付け状態を得ることができる。   For this reason, the board 11 can be screwed efficiently and the board 11 does not lift from the wall base 10, so that the board 11 is in close contact with the wall base 10 as shown in FIG. The state can be obtained.

また、切込み刃５のねじれ角は、ねじ山４のねじれ角より大きいため、その切込み刃５の壁下地１０に対するねじ込み量はねじ山４がボード１１にねじ込まれるねじ込み量より大きい。このため、ボード１１は壁下地１０に強く押し込まれることになり、より体裁の良好な取付け状態を得ることができる。   Further, since the twist angle of the cutting blade 5 is larger than the twist angle of the screw thread 4, the screwing amount of the cutting blade 5 with respect to the wall base 10 is larger than the screwing amount of the screw thread 4 screwed into the board 11. For this reason, the board 11 will be strongly pushed into the wall base 10, and an attachment state with a better appearance can be obtained.

(Ｉ)は、この発明に係るタッピングねじの実施の形態を示す正面図、(II)はタッピングねじの先端部を拡大して示す正面図、(III)は(II)の底面図(I) is a front view showing an embodiment of a tapping screw according to the present invention, (II) is an enlarged front view showing a tip portion of the tapping screw, and (III) is a bottom view of (II). ボードの取り付け途中の状態を示す断面図Sectional view showing the state during board installation ボードの取り付け完了状態を示す断面図Sectional view showing the board installation completion

符号の説明Explanation of symbols

１ ストレート軸
２ 円錐形部
３ 頭部
４ ねじ山
５ 切込み刃
６ ねじれ突起 DESCRIPTION OF SYMBOLS 1 Straight axis | shaft 2 Conical part 3 Head 4 Thread 5 Cutting blade 6 Twist protrusion

Claims (3)

先端に円錐形部を有し、後端に頭部が形成された断面丸形のストレート軸の外周に螺旋状のねじ山を形成したタッピングねじにおいて、
前記円錐形部の先端部外周に、前記ねじ山と同方向に捩じれる断面三角形の切込み刃を形成したことを特徴とするタッピングねじ。 In a tapping screw having a conical part at the front end and a spiral thread formed on the outer periphery of a straight shaft having a round cross section with a head formed at the rear end,
A tapping screw characterized in that a cutting blade having a triangular section that is twisted in the same direction as the thread is formed on the outer periphery of the tip of the conical portion. 前記切込み刃のねじれ角を前記ねじ山のねじれ角より大きくした請求項１に記載のタッピングねじ。   The tapping screw according to claim 1, wherein a twist angle of the cutting blade is larger than a twist angle of the thread. 前記切込み刃とねじ山の先端間に、ねじ山のねじれ角よりねじれの大きい断面三角形の一対のねじれ突起を対向位置に設けた請求項１又は２に記載のタッピングねじ。   The tapping screw according to claim 1 or 2, wherein a pair of twisting protrusions having a triangular cross-section having a larger twist than the twist angle of the thread is provided at an opposing position between the cutting blade and the tip of the thread.
JP2005369855A 2005-12-22 2005-12-22 Tapping screw Active JP4727415B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5392555A (en) * 1977-01-21 1978-08-14 Nishihara Kankiyou Eisei Kenki Aerator
JPS62130209A (en) * 1985-11-29 1987-06-12 Kobe Steel Ltd Reconditioning and repairing method for slag pot
JPS6465409A (en) * 1987-09-04 1989-03-10 Asahi Seimitsu Kk Gradient adjusting device for laser gradient collimator
JPH10220441A (en) * 1997-02-04 1998-08-21 Wakai Sangyo Kk Tapping screw
JP2005090518A (en) * 2003-09-11 2005-04-07 Higashi Nippon Power Fastening Kk Wood screw for plywood for floor and floor fastening construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5429411Y2 (en) * 1976-12-28 1979-09-19
JPS62130209U (en) * 1986-02-07 1987-08-17
JPH0514005Y2 (en) * 1987-06-19 1993-04-14

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5392555A (en) * 1977-01-21 1978-08-14 Nishihara Kankiyou Eisei Kenki Aerator
JPS62130209A (en) * 1985-11-29 1987-06-12 Kobe Steel Ltd Reconditioning and repairing method for slag pot
JPS6465409A (en) * 1987-09-04 1989-03-10 Asahi Seimitsu Kk Gradient adjusting device for laser gradient collimator
JPH10220441A (en) * 1997-02-04 1998-08-21 Wakai Sangyo Kk Tapping screw
JP2005090518A (en) * 2003-09-11 2005-04-07 Higashi Nippon Power Fastening Kk Wood screw for plywood for floor and floor fastening construction

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