JP2008039059A - Screw - Google Patents

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Publication number
JP2008039059A
JP2008039059A JP2006214225A JP2006214225A JP2008039059A JP 2008039059 A JP2008039059 A JP 2008039059A JP 2006214225 A JP2006214225 A JP 2006214225A JP 2006214225 A JP2006214225 A JP 2006214225A JP 2008039059 A JP2008039059 A JP 2008039059A
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JP
Japan
Prior art keywords
screw
shaft portion
thread
diameter
round shaft
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Pending
Application number
JP2006214225A
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Japanese (ja)
Inventor
Koichi Kakizawa
宏一 柿澤
Tetsuo Miwa
哲夫 三輪
Nobuhiro Okamoto
信浩 岡本
Yusuke Takeuchi
祐介 武内
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OKITSU RASEN CO Ltd
OKITSU RASEN KK
Shin Nikkei Co Ltd
Fujikura Shoji Co Ltd
Original Assignee
OKITSU RASEN CO Ltd
OKITSU RASEN KK
Shin Nikkei Co Ltd
Fujikura Shoji Co Ltd
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Application filed by OKITSU RASEN CO Ltd, OKITSU RASEN KK, Shin Nikkei Co Ltd, Fujikura Shoji Co Ltd filed Critical OKITSU RASEN CO Ltd
Priority to JP2006214225A priority Critical patent/JP2008039059A/en
Publication of JP2008039059A publication Critical patent/JP2008039059A/en
Pending legal-status Critical Current

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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
    • F16B25/0057—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 screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • 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
    • 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
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/06—Screwed connections specially modified in view of tensile load; Break-bolts having regard to possibility of fatigue rupture

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw which is smoothly screwed to wood, resin or metal while preventing breakage thereof by resistance to an excessive torque. <P>SOLUTION: The screw comprises: a round shank part 5 having the same diameter over the whole length and including a thread 3 spirally provided on the outer circumference; a taper part 7 provided at a tip of the round shank part 5 and including a thread 3 spirally provided on the outer circumference; and a head part 9 provided at the rear end of the round shank part 5 and including a driver engagement hole 11 at a top part. A major diameter shank part 13 of the same diameter is provided in a position closer to the head part of the round shank part 5, and the outer diameter of the thread 3 of the major diameter shank part 13 is set equal to that of the thread 3 of the round shank part 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、木材や樹脂又は金属にねじ込んで締め付け作業に使用するタイプのねじに関し、特に、木材や樹脂又は金属にねじ込んだ際、トルクに対する抵抗によって破壊してしまうことを防止し、スムーズにねじ込むことができるように工夫したものに関する。   The present invention relates to a screw of a type that is screwed into wood, resin, or metal and used for tightening work, and in particular, when screwed into wood, resin, or metal, it is prevented from being broken by resistance to torque and screwed smoothly. It relates to things devised to be able to.

一般に、木ねじは、頭部を有する丸軸部の先端に尖端状のテーパ部を設け、上記テーパ部から丸軸部にわたってねじ山を形成したものである。ここで丸軸部は全長にわたって同一径とされている。上記木ねじは、頭部頂面に設けられたドライバ係合孔に、ドライバ（エアドライバや電動ドライバ等）を係合し、例えばアルミサッシ枠を躯体に取り付けるために木材や樹脂へねじ込まれる。   In general, wood screws are provided with a pointed taper at the tip of a round shaft having a head, and a thread is formed from the taper to the round shaft. Here, the round shaft portion has the same diameter over the entire length. The wood screw is screwed into wood or resin in order to engage a driver (such as an air driver or an electric driver) in a driver engagement hole provided on the top surface of the head, and to attach an aluminum sash frame to the housing, for example.

また、タッピンねじは、頭部を有する丸軸部の先端にテーパ部を設け、上記テーパ部から丸軸部にわたってねじ山を形成したものである。上記タッピンねじは、頭部頂面に設けられたドライバ係合孔にドライバを係合し、上記と同様に金属等に設けたドリル孔にねじ込まれる。   Further, the tapping screw has a taper portion at the tip of a round shaft portion having a head, and a thread is formed from the taper portion to the round shaft portion. The tapping screw engages a driver with a driver engaging hole provided on the top surface of the head, and is screwed into a drill hole provided in a metal or the like in the same manner as described above.

尚、このようなねじとしては、例えば、特許文献１に記載されたようなものがある。   Examples of such screws include those described in Patent Document 1.

特開平０９−２１７７２３号公報JP 09-217723 A

上記従来の構成によると次のような問題があった。まず、このような木や樹脂等へのねじ込みの際には、ねじ山が木や樹脂等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しにくいという問題がある。   The conventional configuration has the following problems. First of all, when screwing into such wood or resin, the thread enters while cutting wood or resin, so that chips are generated. There is a problem that it adheres to the outer periphery and becomes a rotational resistance, making it difficult to smoothly screw in.

特に、木や樹脂等が硬い場合には、ねじ込んでいくに従って抵抗が増大し、過大なトルクに対する抵抗によって丸軸部の頭部側が破壊してしまうという問題がある。   In particular, when wood, resin, or the like is hard, there is a problem that resistance increases as it is screwed in, and the head side of the round shaft portion is destroyed due to resistance against excessive torque.

本発明はこのような点に基づいてなされたものでその目的とするところは、木材や樹脂又は金属にねじ込んだ際、過大なトルクに対する抵抗によって破壊してしまうことを防止し、スムーズにねじ込むことができるねじを提供することにある。   The present invention has been made on the basis of such points, and the object of the present invention is to prevent breakage due to excessive resistance to torque when screwed into wood, resin or metal, and to screw in smoothly. It is to provide a screw that can be used.

上記目的を達成するべく本願発明の請求項１によるねじは、全長にわたって同一径であって外周に螺旋状にねじ山が設けられた丸軸部と、上記丸軸部の先端に設けられ外周に螺旋状にねじ山が設けられたテーパ部と、上記丸軸部の後端に設けられ頂部にドライバ係合孔を備えた頭部とからなるねじにおいて、上記丸軸部の頭部側の位置に同一径の大径軸部を設け、大径軸部のねじ山の外径を上記丸軸部のねじ山の外径と同径としたことを特徴とするものである。このタイプのねじとしては、木や樹脂に使用される木ねじや鉄板等の金属に使用されるタッピンねじがある。また、ねじの条数のタイプとしては、１条ねじ、２条ねじがある。   In order to achieve the above object, the screw according to claim 1 of the present invention has a round shaft portion having the same diameter over the entire length and spirally provided on the outer periphery, and a round shaft portion provided at the tip of the round shaft portion on the outer periphery. In a screw comprising a taper portion provided with a screw thread in a spiral shape and a head portion provided with a driver engagement hole at the top portion provided at the rear end of the round shaft portion, the position on the head side of the round shaft portion A large-diameter shaft portion having the same diameter is provided, and the outer diameter of the thread of the large-diameter shaft portion is the same as the outer diameter of the thread of the round shaft portion. As this type of screw, there are a tapping screw used for metal such as wood screws and iron plates used for wood and resin. In addition, as the type of the number of threads, there are a single thread and a double thread.

本発明のねじによると、丸軸部の頭部側の位置に同一径の大径軸部を設け、同一径の大径軸部のねじ山の外径を上記丸軸部のねじ山の外径と同径としたので、ねじを木や樹脂等にねじ込む際、ねじ込むに従って抵抗が増大するが、抵抗がかかる頭部側の位置を太く形成しているので、ねじが破壊されるのを防止することができ、大径軸部はねじ山の外径を丸軸部のねじ山の外径と同径としているので、スムーズなねじ込みが確保される。   According to the screw of the present invention, the large-diameter shaft portion having the same diameter is provided at the position of the head portion side of the round shaft portion, and the outer diameter of the screw thread of the large-diameter shaft portion having the same diameter is set outside the screw thread of the round shaft portion. Since the diameter is the same as the diameter, when the screw is screwed into wood or resin, the resistance increases as the screw is screwed in. However, the position on the head side where the resistance is applied is made thick, so that the screw is prevented from being destroyed. The large-diameter shaft portion has the same outer diameter as that of the round shaft portion, so that smooth screw-in is ensured.

以下、図１乃至図４を参照して本発明の第１の実施の形態を説明する。図１は本発明の木ねじの側面図であり、図２は本発明の木ねじの正面図である。図３は従来のねじの作用状態説明図であり、図４は本発明の木ねじの作用状態説明図である。図１に示すように、木ねじ１は、外周に螺旋状にねじ山３が設けられた丸軸部５と、上記丸軸部５の先端に設けられ外周に螺旋状にねじ山３が設けられたテーパ部（尖端部）７と、上記丸軸部５の後端に設けられ頂部にドライバ係合孔１１を備えた頭部９と、からなるものである。上記テーパ部７は尖端状をなしている。図示のものは、ステンレス製の２条木ねじであり、頭部は丸皿、頂部のドライバ係合孔１１としては十字穴を設けている。   Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the wood screw of the present invention, and FIG. 2 is a front view of the wood screw of the present invention. FIG. 3 is a diagram for explaining the action state of a conventional screw, and FIG. 4 is a diagram for explaining the action state of the wood screw of the present invention. As shown in FIG. 1, a wood screw 1 is provided with a round shaft portion 5 having a screw thread 3 spirally provided on the outer periphery, and a screw thread 3 spirally provided on the outer periphery of the round shaft portion 5. And a head portion 9 provided at the rear end of the round shaft portion 5 and provided with a driver engagement hole 11 at the top thereof. The taper portion 7 has a pointed shape. The one shown in the figure is a stainless steel two-piece wood screw, the head has a round plate, and the driver engagement hole 11 at the top is provided with a cross hole.

図１に示すように、上記丸軸部５は全長にわたって同一径に形成されているが、丸軸部５の頭部９側の位置に同一径の大径軸部１３が設けられている。上記大径軸部１３は、丸軸部５から段差を付けて大径に形成され頭部９に至っている。そして、上記大径軸部１３の外周には螺旋状にねじ山３が設けられている。このネジ山３の外径は丸軸部５のネジ山の外径と同径に形成されている。尚、大径軸部１３と丸軸部５とは滑らかに連続するように形成されている。つまり、同一径の大径軸部１３が頭部側の位置において、同一径で大径に形成されていることから、同部のネジ山３の高さは低くなるように形成されている。上記大径軸部１３のネジ山３のピッチは丸軸部５のネジ山３のピッチと同じである。   As shown in FIG. 1, the round shaft portion 5 is formed to have the same diameter over the entire length, but a large diameter shaft portion 13 having the same diameter is provided at a position on the head 9 side of the round shaft portion 5. The large diameter shaft portion 13 is formed in a large diameter with a step from the round shaft portion 5 and reaches the head 9. A screw thread 3 is spirally provided on the outer periphery of the large-diameter shaft portion 13. The outer diameter of the thread 3 is formed to be the same as the outer diameter of the thread of the round shaft portion 5. The large-diameter shaft portion 13 and the round shaft portion 5 are formed so as to be smoothly continuous. That is, since the large-diameter shaft portion 13 having the same diameter is formed with the same diameter and a large diameter at the position on the head side, the height of the thread 3 of the same portion is formed to be low. The pitch of the threads 3 of the large diameter shaft portion 13 is the same as the pitch of the threads 3 of the round shaft portion 5.

以上の構成を基にその作用を説明する。図３は従来のねじを使用した状態を示す図であり、図４は本発明のねじを使用した状態を示すものである。例えばアルミサッシ枠を躯体に取り付けるために、頭部９のドライバ係合孔１１にドライバ（エアドライバや電動ドライバ等）を差し込んで、ねじをアルミサッシ枠の取付ビス孔から螺入して、ドライバの回転駆動力によって木にねじ込んでいくものである。   The operation will be described based on the above configuration. FIG. 3 is a view showing a state where a conventional screw is used, and FIG. 4 is a view showing a state where the screw of the present invention is used. For example, in order to attach an aluminum sash frame to the housing, a screwdriver (air driver, electric screwdriver, etc.) is inserted into the driver engagement hole 11 of the head 9, and a screw is screwed into the mounting screw hole of the aluminum sash frame. It is screwed into the wood by the rotational driving force.

従来のねじ１０１の場合には、木や樹脂等にねじ込んでいく際、当初は抵抗が少なくスムーズに進入させることができるが、ねじ込むに従って抵抗が増大し、木や樹脂等が硬い場合は、ねじの頭部側が破壊されてしまうことがある。   In the case of the conventional screw 101, when it is screwed into wood or resin, it can be made to enter smoothly with little resistance at first, but the resistance increases as the screw is screwed in, and if wood or resin is hard, the screw May be destroyed.

一方、本発明のねじ１の場合には、丸軸部５の頭部側の位置に同一径の大径軸部１３を設け、大径軸部１３のねじ山３の外径を上記丸軸部５のねじ山３の外径と同径としたので、ねじ１を木や樹脂等にねじ込む際、ねじ込むに従って抵抗が増大するが、抵抗がかかる頭部９側の位置を太く形成しているので、ねじ１が破壊されるのを防止することができる。また、同一径の大径軸部１３はねじ山３の外径を丸軸部５のねじ山３の外径と同径としたので、ねじ山３が低くなっており、スムーズにねじ込むことができる。   On the other hand, in the case of the screw 1 of the present invention, the large-diameter shaft portion 13 having the same diameter is provided at the position on the head side of the round shaft portion 5, and the outer diameter of the thread 3 of the large-diameter shaft portion 13 is set to the above-described round shaft. Since the outer diameter of the thread 3 of the portion 5 is the same as the outer diameter, when the screw 1 is screwed into wood or resin, the resistance increases as it is screwed, but the position on the head 9 side where the resistance is applied is thickened. Therefore, it is possible to prevent the screw 1 from being broken. Further, since the large diameter shaft portion 13 having the same diameter has the same outer diameter as that of the screw thread 3 of the round shaft portion 5, the screw thread 3 is low and can be smoothly screwed in. it can.

上記２条ねじの場合には、１条ねじと較べてねじ込みスピードが上がり、作業性を向上させることができる。１条ねじでねじ込みの際の抵抗を低減するにはリード角を寝かせ気味にすることが考えられるが、ねじ込みスピードが落ち、作業性が低下してしまう。しかし、ねじ込みスピードが上がると、木や樹脂等が硬い場合、ドライバのパワーが上がっているので、ねじが抵抗に負けて破壊してしまうおそれがある。本発明はこのような問題点を解消するため、抵抗のかかる頭部９側の位置に同一径の大径軸部１３を形成したものである。これにより、２条ねじとした場合には、ねじ込みスピードが上がって作業性が良く、しかも強度を向上し、ねじ込み時の抵抗によるねじの破壊を防ぐことができる。   In the case of the above-mentioned double thread screw, the screwing speed is increased as compared with the single thread thread, and workability can be improved. In order to reduce the resistance at the time of screwing with a single thread, it is conceivable that the lead angle is laid down, but the screwing speed is lowered and workability is lowered. However, when the screwing speed is increased, if wood or resin is hard, the power of the driver is increased, so that the screw may be damaged by resistance and may be destroyed. In the present invention, in order to solve such problems, a large-diameter shaft portion 13 having the same diameter is formed at a position on the head 9 side where resistance is applied. As a result, when a double thread is used, the screwing speed is increased, the workability is good, the strength is improved, and the breakage of the screw due to resistance during screwing can be prevented.

以上本実施の形態によると次のような効果を奏することができる。まず、丸軸部５の頭部９側の位置に同一径の大径軸部１３を設け、大径軸部１３のねじ山３の外径を上記丸軸部５のねじ山３の外径と同径としたので、ねじ１を木や樹脂等にねじ込む際、ねじ込むに従って抵抗が増大するが、抵抗がかかる頭部９側の位置を太く形成しているので、ねじ１が破壊されるのを防止することができ、大径軸部１３はねじ山３の外径を丸軸部５のねじ山３の外径と同径としているので、スムーズなねじ込みを確保することができる。   As described above, according to the present embodiment, the following effects can be obtained. First, a large-diameter shaft portion 13 having the same diameter is provided at a position on the head 9 side of the round shaft portion 5, and the outer diameter of the thread 3 of the large-diameter shaft portion 13 is set to the outer diameter of the thread 3 of the round shaft portion 5. When the screw 1 is screwed into wood or resin, the resistance increases as the screw 1 is screwed. However, the screw 1 is destroyed because the position on the head 9 side where the resistance is applied is formed thicker. Since the outer diameter of the screw thread 3 is the same as the outer diameter of the screw thread 3 of the round shaft part 5, the large diameter shaft part 13 can ensure smooth screwing.

次に、図５及び図６を参照して本発明の第２の実施の形態を説明する。この第２の実施の形態の場合には、タッピンねじ２を示したものである。上記タッピンねじ２は、外周に螺旋状にねじ山３が設けられた丸軸部５と、上記丸軸部５の先端に設けられ外周に螺旋状にねじ山３が設けられたテーパ部（絞った部分）７と、上記丸軸部５の後端に設けられ頂部にドライバ係合孔１１を備えた頭部９と、からなるものである。図示したものは、ステンレス製の２条タッピンねじであり、頭部９は丸皿、頂部のドライバ係合孔１１としては十字穴を設けたものである。   Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of this second embodiment, a tapping screw 2 is shown. The tapping screw 2 includes a round shaft portion 5 provided with a screw thread 3 spirally on the outer periphery, and a tapered portion provided with a screw thread 3 provided spirally on the outer periphery provided at the tip of the round shaft portion 5. 7) and a head 9 provided at the rear end of the round shaft portion 5 and provided with a driver engagement hole 11 at the top. The illustrated one is a stainless steel two-thread tapping screw, the head 9 is provided with a round plate, and the driver engagement hole 11 at the top is provided with a cross hole.

図５に示すように、上記丸軸部５は全長にわたって同一径に形成されているが、丸軸部５の頭部９側の位置に同一径の大径軸部１３が設けられている。上記大径軸部１３は、丸軸部５から段差付きで大径に形成され頭部９に至っている。そして、上記同一径の大径軸部１３の外周には螺旋状にねじ山３が設けられている。このネジ山３の外径は丸軸部５のネジ山の外径と同径に形成されている。つまり、同一径の大径軸部１３が頭部側の位置において、同一径で大径に形成されていることから、同部のネジ山３の高さは低くなるように形成されている。尚、大径軸部１３のネジ山３のピッチは丸軸部５のネジ山３のピッチと同じである。その他の構成は前記第１の実施の形態の場合と同じであるので同一部分には同一符号を付して示しその説明は省略する。   As shown in FIG. 5, the round shaft portion 5 is formed to have the same diameter over the entire length, but a large diameter shaft portion 13 having the same diameter is provided at a position on the head 9 side of the round shaft portion 5. The large-diameter shaft portion 13 is formed in a large diameter with a step from the round shaft portion 5 and reaches the head portion 9. A screw thread 3 is spirally provided on the outer periphery of the large-diameter shaft portion 13 having the same diameter. The outer diameter of the thread 3 is formed to be the same as the outer diameter of the thread of the round shaft portion 5. That is, since the large-diameter shaft portion 13 having the same diameter is formed with the same diameter and a large diameter at the position on the head side, the height of the thread 3 of the same portion is formed to be low. In addition, the pitch of the thread 3 of the large diameter shaft portion 13 is the same as the pitch of the thread 3 of the round shaft portion 5. Since other configurations are the same as those in the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

上記構成によると次のような効果を奏することができる。まず、丸軸部の頭部側の位置に同一径の大径軸部１３を設け、同一径の大径軸部１３のねじ山３の外径を上記丸軸部５のねじ山３の外径と同径としたので、タッピンねじ２を鉄板等のドリル孔等にねじ込んで締め付ける際、ねじ込むに従って抵抗が増大するが、抵抗がかかる頭部９側の位置を太く形成しているので、タッピンねじ２が破壊されるのを防止することができ、大径軸部１３はねじ山３の外径を丸軸部５のねじ山３の外径と同径としているので、ねじ山３が低くなっており、スムーズにねじ込むことができる。また、２条ねじとした場合には、ねじ込みスピードが上がって締め付け作業の作業性が良く、しかも強度も向上し、ねじ込み時の抵抗によるタッピンねじの破壊を防ぐことができる。   According to the said structure, there can exist the following effects. First, a large-diameter shaft portion 13 having the same diameter is provided at a position on the head side of the round shaft portion, and the outer diameter of the screw thread 3 of the large-diameter shaft portion 13 having the same diameter is set to the outside of the screw thread 3 of the round shaft portion 5. Because the diameter is the same as the diameter, when the tapping screw 2 is screwed into a drill hole or the like of an iron plate or the like, the resistance increases as the screw is screwed in, but the position on the head 9 side where the resistance is applied is formed thicker. The screw 2 can be prevented from being broken, and the large-diameter shaft portion 13 has the same outer diameter as that of the screw thread 3 of the round shaft portion 5. It can be screwed in smoothly. Further, when the double thread is used, the screwing speed is increased, the workability of the tightening work is improved, the strength is improved, and the tapping screw can be prevented from being broken by the resistance at the time of screwing.

尚、本発明は前記第１及び第２の実施の形態に限定されるものではない。まず、図示した第１又は第２の実施の形態の場合は、ステンレス製の２条ねじであって、頭部は丸皿、頂部のドライバ係合孔としては十字穴を設けたものを示しているが、木ねじやタッピンねじには種々のタイプのものがあり、これらの各タイプのものでも良い。例えば、材質は鉄製、チタン製等でも良く、条数は１条ねじでも良く、頭部は皿ねじ等の形状でも良く、ドライバ係合孔はスリワリタイプ等でも良い。   The present invention is not limited to the first and second embodiments. First, in the case of the illustrated first or second embodiment, a double thread screw made of stainless steel having a round plate at the head and a cross hole as a driver engagement hole at the top is shown. However, there are various types of wood screws and tapping screws, and these types may be used. For example, the material may be made of iron or titanium, the number of threads may be one thread, the head may be shaped like a countersunk screw, and the driver engagement hole may be a slit type.

本発明の第１の実施の形態を示し、木ねじの側面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the side view of the wood screw which shows the 1st Embodiment of this invention. 本発明の第１の実施の形態を示し、木ねじの正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the front view of the wood screw which shows the 1st Embodiment of this invention. 従来のねじの作用状態説明図である。It is an action state explanatory view of the conventional screw. 本発明の第１の実施の形態を示し、本発明のねじの作用状態説明図である。FIG. 2 is a diagram illustrating an operation state of the screw of the present invention, showing the first embodiment of the present invention. 本発明の第２の実施の形態を示し、タッピンねじの側面図であるFIG. 6 is a side view of a tapping screw showing a second embodiment of the present invention. 本発明の第２の実施の形態を示し、タッピンねじの正面図であるIt is a front view of a tapping screw, showing a second embodiment of the present invention.

符号の説明Explanation of symbols

１ ねじ
３ ねじ山
５ 丸軸部
７ テーパ部
９ 頭部
１１ドライバ係合孔
１３大径軸部 DESCRIPTION OF SYMBOLS 1 Screw 3 Thread 5 Round shaft part 7 Tapered part 9 Head part 11 Driver engagement hole 13 Large diameter shaft part

Claims (1)

全長にわたって同一径であって外周に螺旋状にねじ山が設けられた丸軸部と、上記丸軸部の先端に設けられ外周に螺旋状にねじ山が設けられたテーパ部と、上記丸軸部の後端に設けられ頂部にドライバ係合孔を備えた頭部とからなるねじにおいて、上記丸軸部の頭部側の位置に同一径の大径軸部を設け、大径軸部のねじ山の外径を上記丸軸部のねじ山の外径と同径としたことを特徴とするねじ。   A round shaft portion having the same diameter over the entire length and spirally provided on the outer periphery; a tapered portion provided at the tip of the round shaft portion and provided with a spiral thread on the outer periphery; and the round shaft A screw having a head with a driver engagement hole at the top and a large-diameter shaft portion of the same diameter is provided at a position on the head side of the round shaft portion. A screw characterized in that the outer diameter of the thread is the same as the outer diameter of the thread of the round shaft portion.
JP2006214225A 2006-08-07 2006-08-07 Screw Pending JP2008039059A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010169253A (en) * 2008-12-24 2010-08-05 Ei Itokazu Countersunk head screw
JP2015086975A (en) * 2013-10-31 2015-05-07 日東精工株式会社 Tapping screw

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5270259U (en) * 1975-11-20 1977-05-25
JPS6023614A (en) * 1983-07-15 1985-02-06 有限会社新城製作所 Tapping screw for light aerated concrete
JPS61150511U (en) * 1985-03-12 1986-09-17

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5270259U (en) * 1975-11-20 1977-05-25
JPS6023614A (en) * 1983-07-15 1985-02-06 有限会社新城製作所 Tapping screw for light aerated concrete
JPS61150511U (en) * 1985-03-12 1986-09-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010169253A (en) * 2008-12-24 2010-08-05 Ei Itokazu Countersunk head screw
JP2015086975A (en) * 2013-10-31 2015-05-07 日東精工株式会社 Tapping screw

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