JP4531510B2 - Wood screw - Google Patents

Wood screw Download PDF

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JP4531510B2
JP4531510B2 JP2004281314A JP2004281314A JP4531510B2 JP 4531510 B2 JP4531510 B2 JP 4531510B2 JP 2004281314 A JP2004281314 A JP 2004281314A JP 2004281314 A JP2004281314 A JP 2004281314A JP 4531510 B2 JP4531510 B2 JP 4531510B2
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shaft portion
wood
screw
thread
round shaft
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JP2006097719A (en
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誠一朗 高崎
利晃 安田
勤 柏倉
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誠一朗 高崎
利晃 安田
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0052—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge having indentations, notches or the like in order to improve the cutting behaviour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material

Description

この発明は、木材同士を結合し、あるいは木材に各種の物品を固定する際に用いられる木ねじに関する。   The present invention relates to a wood screw used for joining woods or fixing various articles to woods.

一般に、木ねじは特許文献1に示すように、外周にらせん状にねじ山を設けた先端が尖鋭な丸軸部と、丸軸部の後端に設けた頭部とからなる。ここで丸軸部は全長にわたって同一径とされている。かかる木ねじは、頭部頂面に設けられたドライバ係合孔に、エアドライバ等を係合し、木材へねじ込まれる。
２００４−１０８５４１号公報 In general, as shown in Patent Document 1, a wood screw is composed of a round shaft portion with a sharp tip provided with a spiral thread on the outer periphery and a head portion provided at the rear end of the round shaft portion. Here, the round shaft portion has the same diameter over the entire length. Such a wood screw is screwed into wood by engaging an air driver or the like in a driver engagement hole provided on the top surface of the head.
2004-108541

このような木材へのねじ込みの際には、ねじ山が木材を切り込みながら進入するため、切り粉が発生し、その切り粉はねじ山のフランクや丸軸部の外周に付着して回転抵抗となりスムーズなねじ込みが実現できない問題がある。   When screwing into such wood, the thread enters while cutting the wood, so that chips are generated, and the chips adhere to the flank of the thread and the outer periphery of the round shaft and become rotational resistance. There is a problem that smooth screwing cannot be realized.

とくに長さが長い木ねじの場合や、木材が硬い場合、回転抵抗による摩擦熱により焼き付きが生じてロックし、完全にねじ込むことができない場合や丸軸部が破断を起こす問題がある。   In particular, in the case of a long wood screw or a hard wood, there is a problem that seizure occurs due to frictional heat due to rotational resistance, and the screw cannot be completely screwed in or the round shaft portion breaks.

そこで、この発明の課題は焼き付きを防止し、スムーズなねじ込みを実現することができるようにした木ねじを提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a wood screw that prevents seizure and can realize smooth screwing.

上記課題を解決するため、この発明は、外周にらせん状にねじ山を設けた、先端に尖鋭部を有する丸軸部と、前記丸軸部の後端に設けた頭部とからなる木ねじにおいて、前記丸軸部の先端部の尖鋭部から頭部側に片寄った位置に小径軸部を設け、これにより丸軸部を、前記尖鋭部から、大径軸部、小径軸部、大径軸部の順に構成し、かつ前記丸軸部の尖鋭部に、ねじ山と同一方向に傾斜し、その傾斜角がねじ山の傾斜角より大きいねじれ突条を周方向に間隔をおいて複数形成し、そのねじれ突条の頂部に切り刃を設けたのである。 In order to solve the above-mentioned problems, the present invention provides a wood screw comprising a round shaft portion having a pointed portion at the tip and a head portion provided at the rear end of the round shaft portion, which is provided with a helical thread on the outer periphery. A small-diameter shaft portion is provided at a position offset from the sharp portion of the tip portion of the round shaft portion toward the head side, whereby the round shaft portion is separated from the sharp portion by a large-diameter shaft portion, a small-diameter shaft portion, a large-diameter shaft. A plurality of twisted ridges that are inclined in the same direction as the screw thread and whose inclination angle is larger than the inclination angle of the screw thread at intervals in the circumferential direction. A cutting blade is provided on the top of the twisted ridge .

また、この発明にかかる木ねじにおいて、ねじ山上に、ねじ山より高さが高く、底面径がねじ山の幅寸法より大きい円錐形の突起を間隔をあけて複数設けるのが好ましい。 Further, in the wood screw according to the present invention, the root Ji mountain height than the thread is high, preferably the bottom diameter providing a plurality at intervals the protrusion of larger conical than the width of the thread.

上記のように、丸軸部の先端部に小径軸部を設けることにより、木材に木ねじをねじ込むと小径軸部の外周囲に空間が形成され、ねじ込みにより発生する切り粉はその空間に収容されることになり、切り粉の付着による回転抵抗の増大を抑制し、焼き付きを防止してスムーズなねじ込みを実現することができる。   As described above, by providing the small-diameter shaft portion at the tip of the round shaft portion, when a wood screw is screwed into the wood, a space is formed around the small-diameter shaft portion, and chips generated by the screwing are accommodated in the space. As a result, an increase in rotational resistance due to the adhesion of chips can be suppressed, seizure can be prevented, and smooth screwing can be realized.

また、丸軸部の先端部にねじれ突条を設け、そのねじれ突条の頂部に切り刃を形成したことにより、上記切り刃は木材を切削しつつ木材内部に侵入し、切削によって形成された孔の内周に沿ってねじ山がねじこまれるため、ねじ山に負荷される回転抵抗は小さく、木ねじをよりスムーズにねじ込むことができる。   Also, by providing a twisted ridge at the tip of the round shaft portion and forming a cutting blade at the top of the twisted ridge, the cutting blade penetrated into the wood while cutting the wood and was formed by cutting. Since the screw thread is screwed along the inner periphery of the hole, the rotational resistance applied to the screw thread is small, and the wood screw can be screwed more smoothly.

さらに、ねじ山上に円錐形の突起を形成したことにより、この突起は先行側のねじ山に形成されたねじ溝を押し広げながら移動し、突起の後行側のねじ山は押し広げられたねじ溝に沿って移動することになる。このため、木ねじに負荷される回転抵抗はより小さくなり、木材に対して木ねじをよりスムーズにねじ込むことができる。   Furthermore, by forming a conical protrusion on the thread, this protrusion moves while expanding the thread groove formed on the preceding thread, and the thread on the subsequent side of the protrusion is expanded screw. It will move along the groove. For this reason, the rotational resistance applied to the wood screw becomes smaller, and the wood screw can be screwed more smoothly into the wood.

以下、この発明の実施形態を図面に基づいて説明する。図１に示すように、木ねじ１０は、尖鋭部１２ａを先端に有する丸軸部１２と、丸軸部１２の後端に設けられた皿形の頭部１１とからなり、上記丸軸部１２の外周には先鋭部１２ａから頭部１１に向けてらせん状のねじ山１３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, the wood screw 10 includes a round shaft portion 12 having a pointed portion 12 a at the tip and a dish-shaped head portion 11 provided at the rear end of the round shaft portion 12. A spiral screw thread 13 is provided on the outer periphery of the head from the sharpened portion 12 a toward the head portion 11.

図２に示すように、丸軸部１２には尖鋭部１２ａから頭部１１側に片寄った位置に小径軸部１４が形成されている。また、丸軸部１２の尖鋭部１２ａには、ねじ山１３と同一方向に傾斜し、その傾斜角がねじ山１３の傾斜角より大きい複数のねじれ突条１５が周方向に間隔をおいて形成されている。ねじれ突条１５は、断面三角形の山形とされ、頂部に切り山１５ａが設けられている。また、ねじれ突条１５は、長さ方向中央から両端に至るにしたがって幅寸法がしだいに小さくなり、また長さ方向中央での高さはねじ山１３の高さより低く、その中央から両端に至るにしたがって高さが次第に低くなっている。また、ねじ山１３上には、複数の突起１６が間隔をおいて形成されている。突起１６は円錐形をなし、その底面径はねじ山１３の幅寸法より大きく、高さはねじ山１３の高さより高くなっている。   As shown in FIG. 2, a small-diameter shaft portion 14 is formed on the round shaft portion 12 at a position offset from the sharp portion 12 a toward the head 11 side. Further, a plurality of twisted ridges 15 that are inclined in the same direction as the screw thread 13 and whose inclination angle is larger than the inclination angle of the screw thread 13 are formed in the sharp portion 12 a of the round shaft portion 12 at intervals in the circumferential direction. Has been. The twisted ridge 15 has a mountain shape with a triangular cross section, and a cut mountain 15a is provided at the top. Further, the width of the twisted ridge 15 gradually decreases from the center in the length direction to both ends, and the height at the center in the length direction is lower than the height of the screw thread 13 and reaches from the center to both ends. The height is gradually getting lower. A plurality of protrusions 16 are formed on the screw thread 13 at intervals. The protrusion 16 has a conical shape, the bottom surface diameter is larger than the width dimension of the thread 13, and the height is higher than the height of the thread 13.

実施の形態で示す木ねじ１０は、上記の構成からなる。ここで図３に示すように、この発明にかかる木ねじ１０を木材２０にねじ込むと、まず丸軸部１１の尖鋭部１２ａに設けられたねじれ突条１５の頂部に設けられた切り刃１５ａは、木材２０を切削しつつ木材２０内部に侵入し、切削によって形成された孔の内周に沿ってねじ山１３がねじこまれるため、ねじ山１３に負荷される回転抵抗は小さく、木ねじ１０をよりスムーズにねじ込むことができる。   The wood screw 10 shown in the embodiment has the above-described configuration. Here, as shown in FIG. 3, when the wood screw 10 according to the present invention is screwed into the wood 20, first, the cutting blade 15 a provided on the top of the twisted protrusion 15 provided on the sharp portion 12 a of the round shaft portion 11 is Since the screw thread 13 is screwed in along the inner periphery of the hole formed by cutting while the wood 20 is being cut, the rotational resistance applied to the screw thread 13 is small, and the wood screw 10 is more tightened. Can be screwed in smoothly.

また、丸軸部１２の尖鋭部１２ａから頭部１１側に片寄った位置に小径軸部１４を設けることにより、木材２０に木ねじ１０をねじ込むと小径軸部１４の外周囲に空間が形成される。そのため、ねじ込みにより発生する切り粉２１は、その空間に収容されることになり、切り粉２１の付着による回転抵抗の増大を抑制し、焼き付きを防止してスムーズなねじ込みを実現することができる。   Further, by providing the small-diameter shaft portion 14 at a position offset from the sharp portion 12 a of the round shaft portion 12 toward the head portion 11 side, a space is formed around the small-diameter shaft portion 14 when the wood screw 10 is screwed into the wood 20. . Therefore, the chips 21 generated by screwing are accommodated in the space, and an increase in rotational resistance due to the adhesion of the chips 21 can be suppressed, and seizure can be prevented and smooth screwing can be realized.

さらに、ねじ山１３上に円錐形の突起１６を形成したことにより、この突起１６は先行側のねじ山１３に形成されたねじ溝を押し広げながら移動し、突起１６の後行側のねじ山１３は押し広げられたねじ溝に沿って移動することになる。このため、木ねじ１０に負荷される回転抵抗はより小さくなり、木材２０に対して木ねじ１０をよりスムーズにねじ込むことができる。   Further, since the conical protrusion 16 is formed on the screw thread 13, the protrusion 16 moves while expanding the screw groove formed on the preceding screw thread 13, and the screw thread on the trailing side of the protrusion 16. 13 moves along the expanded screw groove. For this reason, the rotation resistance applied to the wood screw 10 becomes smaller, and the wood screw 10 can be screwed into the wood 20 more smoothly.

この発明に係る木ねじの全体図Overall view of wood screw according to the present invention 木ねじの丸軸部の拡大図Enlarged view of the round shaft of the wood screw 木ねじを木材にねじ込む途中を示す図Diagram showing the process of screwing wood screws into wood

符号の説明Explanation of symbols

１０ 木ねじ
１１ 頭部
１２ 丸軸部
１２ａ 尖鋭部
１３ ねじ山
１４ 小径軸部
１５ ねじれ突条
１５ａ 切り刃
１６ 突起
２０ 木材
２１ 切り粉
DESCRIPTION OF SYMBOLS 10 Wood screw 11 Head 12 Round shaft part 12a Sharp part 13 Screw thread 14 Small diameter shaft part 15 Twist protrusion 15a Cutting blade 16 Protrusion 20 Wood 21 Chip

Claims (2)

外周にらせん状にねじ山１３を設けた、先端に尖鋭部１２ａを有する丸軸部１２と、前記丸軸部１２の後端に設けた頭部１１とからなる木ねじにおいて、
前記丸軸部１２の先端部の尖鋭部１２ａから頭部１１側に片寄った位置に小径軸部１４を設け、これにより丸軸部１２を、前記尖鋭部１２ａから、大径軸部、小径軸部１４、大径軸部の順に構成し、
かつ前記丸軸部１２の尖鋭部１２ａに、ねじ山１３と同一方向に傾斜し、その傾斜角がねじ山１３の傾斜角より大きいねじれ突条１５を周方向に間隔をおいて複数形成し、そのねじれ突条１５の頂部に切り刃１５ａを設けたことを特徴とする木ねじ。 In a wood screw comprising a round shaft portion 12 having a pointed portion 12a at the tip, and a head 11 provided at the rear end of the round shaft portion 12, provided with a screw thread 13 on the outer periphery in a spiral shape,
A small-diameter shaft portion 14 is provided at a position offset from the sharp portion 12a at the tip of the round shaft portion 12 toward the head portion 11 side, whereby the round shaft portion 12 is moved from the sharp portion 12a to the large-diameter shaft portion and the small-diameter shaft. Configured in the order of the portion 14, the large diameter shaft portion,
And in the sharp part 12a of the round shaft part 12, a plurality of twisted ridges 15 which are inclined in the same direction as the thread 13 and whose inclination angle is larger than the inclination angle of the thread 13 are spaced apart in the circumferential direction, A wood screw characterized in that a cutting blade 15 a is provided on the top of the twisted ridge 15. 前記ねじ山１３上に、ねじ山１３より高さが高く、底面径がねじ山１３の幅寸法より大きい円錐形の突起１６を間隔をあけて複数設けた請求項１に記載の木ねじ。   The wood screw according to claim 1, wherein a plurality of conical protrusions 16 having a height higher than the screw thread 13 and having a bottom diameter larger than the width dimension of the screw thread 13 are provided on the screw thread 13 at intervals.
JP2004281314A 2004-09-28 2004-09-28 Wood screw Active JP4531510B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3677800A1 (en) * 2019-01-04 2020-07-08 Kuo-Tai Hsu Wood screw
JP2021099161A (en) * 2019-12-21 2021-07-01 徐國泰 Screw having hole expanding portion

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000605A1 (en) * 2007-10-31 2009-05-07 Hilti Aktiengesellschaft screw
DE102015107467A1 (en) * 2015-05-12 2016-11-17 Adolf Würth GmbH & Co. KG Screw with interrupted scraping edges
CH713769A1 (en) 2017-05-12 2018-11-15 Profix Ag Wood screw.
TWI745647B (en) * 2019-01-04 2021-11-11 徐國泰 Wood screw structure
DE102020119633A1 (en) * 2020-07-24 2022-01-27 Berner Trading Holding Gmbh wood or plastic screw
TWI809316B (en) * 2020-09-26 2023-07-21 徐國泰 Anti-pullout low-resistance screw

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558683B2 (en) * 1976-11-25 1980-03-05
JPS5639314A (en) * 1979-09-03 1981-04-15 Topura Kk Self screw thread forming type fixing screw
JPS61189310A (en) * 1985-02-15 1986-08-23 株式会社　ヤマヒロ Self-drilling tapping screw
JPH0165409U (en) * 1987-06-19 1989-04-26
JPH0346012U (en) * 1989-09-12 1991-04-26
JPH06173922A (en) * 1992-12-14 1994-06-21 Mitsui Home Co Ltd Lug bolt for connecting wood member
JP2002089525A (en) * 2000-09-11 2002-03-27 Shiga Fastener:Kk Screw
JP2003042122A (en) * 2001-07-27 2003-02-13 Yao Seibyou Kk Wood screw

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS558683B2 (en) * 1976-11-25 1980-03-05
JPS5639314A (en) * 1979-09-03 1981-04-15 Topura Kk Self screw thread forming type fixing screw
JPS61189310A (en) * 1985-02-15 1986-08-23 株式会社　ヤマヒロ Self-drilling tapping screw
JPH0165409U (en) * 1987-06-19 1989-04-26
JPH0346012U (en) * 1989-09-12 1991-04-26
JPH06173922A (en) * 1992-12-14 1994-06-21 Mitsui Home Co Ltd Lug bolt for connecting wood member
JP2002089525A (en) * 2000-09-11 2002-03-27 Shiga Fastener:Kk Screw
JP2003042122A (en) * 2001-07-27 2003-02-13 Yao Seibyou Kk Wood screw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3677800A1 (en) * 2019-01-04 2020-07-08 Kuo-Tai Hsu Wood screw
JP2021099161A (en) * 2019-12-21 2021-07-01 徐國泰 Screw having hole expanding portion
JP7148588B2 (en) 2019-12-21 2022-10-05 徐國泰 screw with enlarged hole

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