JP3162311U

JP3162311U - screw

Info

Publication number: JP3162311U
Application number: JP2010004093U
Authority: JP
Inventors: 登鴻林
Original assignee: 豐鵬工業股▲分▼有限公司
Priority date: 2010-06-16
Filing date: 2010-06-16
Publication date: 2010-08-26
Anticipated expiration: 2020-06-16

Abstract

【課題】ねじ込む速度が速く、締結に必要な力を少なくし、目的物を割らずにねじ屑を完全に排出可能なねじを提供する。【解決手段】シャンク中間部に形成される一条のねじ山２の他に、下向き錐状突起部に二条の穴あけねじ山４を形成し、ねじを目的物にねじ込む時に先に穴をあけてねじを容易にねじこむことができる。加えて、穴あけねじ山４とシャンク中間部の一条ねじ山２との間に複数の穴拡大ねじ山３を形成することで、穴あけねじ山４であけられた穴を更に押し広げてシャンクが目的物の中に進入でき、目的物を割ることなくねじ屑を排出することができる。また、ねじ頭上部に設置されているフランジとねじ頭下部の底縁外周囲にリング状の複数の爪歯１３、１４を設けて、ねじが目的物にねじこまれた状態を堅固に保持することができる。【選択図】図１Provided is a screw that has a fast screwing speed, reduces a force required for fastening, and can completely discharge thread waste without breaking an object. In addition to a single thread 2 formed in the middle part of the shank, a double-threaded thread 4 is formed in a downward conical projection, and when the screw is screwed into a target, a hole is first drilled. Can be easily screwed in. In addition, by forming a plurality of hole expansion threads 3 between the drilling thread 4 and the single thread 2 in the middle part of the shank, the purpose of the shank is to further expand the hole drilled by the drilling thread 4 It is possible to enter the object and discharge the thread scrap without breaking the object. In addition, a plurality of ring-shaped claw teeth 13 and 14 are provided around the flange installed at the upper part of the screw head and the outer periphery of the bottom edge of the lower part of the screw head, so that the state in which the screw is screwed into the object is firmly held. be able to. [Selection] Figure 1

Description

本考案はねじに関する。 The present invention relates to a screw.

従来の目的物を固く締め付けるねじには、異なる目的を達成する為にさまざまな設計がある。一般的にねじの設計に要求される点として、ねじ込む速度とねじ屑の排出速度が速く、目的物が割れないことが挙げられる。そのため、ねじの設計には一条のねじ山や二条のねじ山、ねじ角度が一律同じものや変化するものなどがある。 There are various designs for screws that fasten conventional objects to achieve different purposes. In general, the screw design requires a high screwing speed and a high thread waste discharge speed so that the object does not break. For this reason, there are screw designs such as a single thread, a double thread, and the same or different thread angles.

目的物の材質や特性の差異を考慮して、金属、プラスチック、木材などそれぞれの材料に適合したねじが使用される。しかし、硬質木材を目的物とした場合、ねじをねじ込む時に目的物が割れ易い欠点がある。 Considering the difference in the material and characteristics of the object, screws suitable for each material such as metal, plastic and wood are used. However, when hard wood is used as an object, there is a drawback that the object is easily broken when a screw is screwed.

上述の目的物に使用される従来のねじの欠点を改善し、ねじ込む速度が速く、締結に必要な力を少なくし、木材やプラスチックを割らないでねじ屑を完全に排出可能なねじを提供する。 Improves the shortcomings of conventional screws used for the above-mentioned objects, provides a screw that can be screwed out quickly, reduces the force required for fastening, and completely discharges screw scraps without breaking wood or plastic .

本考案のねじは、二条の穴あけねじ山が形成される下向き錐状突起部と、その上方に延び、軸方向の中間部に一条のねじ山と軸方向の下方部に多条の穴拡大ねじ山が形成されるシャンクと、シャンク上端に形成されるねじ頭を含む。
シャンクの穴拡大ねじ山は、シャンクの軸方向中間部にある一条のねじ山の下端と、下向きの錐状突起部にある二条の穴あけねじ山の上端の間に形成される。この穴拡大ねじ山は、下向きの傾斜角度をもつ上段部と、上向きの傾斜角度を持つ下段部から構成される。上段部の下向き傾斜角度は、下段部の上向き傾斜角度より小さく、また上段部の上向き傾斜角度と下段部の上向き傾斜角度の和は９０度以上となるように形成される。この穴拡大ねじ山により、錐状突起部の穴あけねじにより形成されたねじ穴を押し広げることとなり、ねじをねじ込む時に目的物を割ることなく、ねじ屑を排出することができる。
また、シャンク上方にあるねじ頭の上部外径は下部外径より大きく、ねじ頭上部に形成されるフランジとねじ頭下部のそれぞれ底縁外周囲には、リング上の複数の爪歯が設けられている。この爪歯により、ねじが目的物にねじ込まれた時に目的物に食い込み、ねじ込まれた状態を堅固に保持することができる。 The screw of the present invention has a downward conical projection formed with two threaded holes, a single thread at the middle in the axial direction and a multiple thread expansion screw at the lower part in the axial direction. It includes a shank in which a mountain is formed and a screw head formed at the upper end of the shank.
The shank hole expansion thread is formed between the lower end of the single thread in the axial middle of the shank and the upper end of the double thread in the downward conical protrusion. This hole expansion thread is composed of an upper step portion having a downward inclination angle and a lower step portion having an upward inclination angle. The downward inclination angle of the upper step portion is smaller than the upward inclination angle of the lower step portion, and the sum of the upward inclination angle of the upper step portion and the upward inclination angle of the lower step portion is 90 degrees or more. By this hole expansion screw thread, the screw hole formed by the drilling screw of the conical protrusion is pushed and widened, and the thread waste can be discharged without breaking the object when the screw is screwed.
In addition, the upper outer diameter of the screw head above the shank is larger than the lower outer diameter, and a plurality of claw teeth on the ring are provided around the outer periphery of the bottom edge of the flange formed at the upper part of the screw head and the lower part of the screw head. ing. By this claw tooth, when the screw is screwed into the object, it can bite into the object and firmly hold the screwed state.

本考案の一実施例によるねじの側面図である。1 is a side view of a screw according to an embodiment of the present invention. 本考案の一実施例によるねじの図１に係るII−II線断面図である。FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 of a screw according to an embodiment of the present invention. 本校案の一実施例によるねじの部分拡大図である。It is the elements on larger scale of the screw by one example of this school plan.

（一実施例）
本考案の一実施例によるねじを図１から図３に基づいて説明する。このねじは、図１に示す通り下向き錐状突起部１１と錐状突起部１１の上方に伸びるシャンク１０とシャンク１０の上端に形成されるねじ頭１とから構成される。 (Example)
A screw according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the screw includes a downward cone-shaped projection 11, a shank 10 extending above the cone-shaped projection 11, and a screw head 1 formed at the upper end of the shank 10.

下向き錐状突起部１１には二条の穴あけねじ山４が形成される、この穴あけねじ山４は尖末端１１０まで延びていてもよく、延びていなくてもよい。 Two pierced screw threads 4 are formed in the downward conical projection 11, and this pierced screw thread 4 may or may not extend to the tip end 110.

シャンク１０は中間部に一条のねじ山２が形成され、ねじ山２の下端部は錐状突起部１１にある二条の穴あけねじ山４の上端部とはある一定の間隔で離れている。このねじ山２とねじ山３の間隔に穴拡大ねじ山３を形成する。ここで穴拡大ねじ山３の上段部３Ａの傾斜角度Ａは、下段部３Ｂの傾斜角度Ｂよりも小さくしている。上段部３Ａの傾斜角度Ａと下段部３Ｂの傾斜角度の和は９０度以上である。 The shank 10 is formed with a single thread 2 in the middle, and the lower end of the thread 2 is separated from the upper end of the double threaded thread 4 in the conical protrusion 11 at a certain interval. An enlarged hole thread 3 is formed in the space between the thread 2 and the thread 3. Here, the inclination angle A of the upper step portion 3A of the hole expansion thread 3 is smaller than the inclination angle B of the lower step portion 3B. The sum of the inclination angle A of the upper step portion 3A and the inclination angle of the lower step portion 3B is 90 degrees or more.

ねじ頭１は厚みを持ち、その外径は上部が下部より大きく、上段にはフランジ１２を設ける。また、フランジ１２の底縁外周囲およびねじ頭１の下部の底縁外周囲には、リング状の複数の爪歯１３、１４が形成される。 The screw head 1 has a thickness, the outer diameter is larger at the upper part than the lower part, and a flange 12 is provided at the upper stage. A plurality of ring-shaped claw teeth 13 and 14 are formed around the outer periphery of the bottom edge of the flange 12 and the outer periphery of the bottom edge of the lower portion of the screw head 1.

本実施例のねじは、通常のねじ山の他に穴あけねじ山と穴拡大ねじ山を追加しているので、木材（特に硬質のもの）の中にねじこむ時、穴をあけながら目的物の中に進行するため、力が節約される上木材を割らずに削られた木屑は完全に外に排出される効果がある。 Since the screw of this embodiment is added with a drilling screw thread and a hole expanding screw thread in addition to the normal screw thread, when screwing into wood (especially hard one) Since it progresses in the inside, the power is saved, and the shavings cut without breaking the wood are completely discharged outside.

（他の実施例）
上記の実施例では、ねじ山２とねじ山４の間隔に三条の穴拡大ねじ山３を形成する。本考案では、穴拡大ねじ山は必ずしもその数を三条に限ることはない。穴拡大ねじ山の旋回方向は、穴拡大ねじ山を間隔におく両側のねじ山と同じでも異なってもよい。
前述の実施形態において、ねじ山の条数、穴拡大ねじ山段部の傾斜角度、ねじ頭の形状等で使用された語彙ならびに説明は、本考案の好ましい実施形態の説明を目的とし、本考案になんらの制限を加えるものではない。よって、本考案の分野を熟知する者は、本考案に開示された内容に基づいて、形状の変更により実現される変化、効果を容易に想到できるものであり、これらは本考案の実用新案登録請求の範囲に含まれる。 (Other examples)
In the above embodiment, the three-hole enlarged screw thread 3 is formed in the space between the screw thread 2 and the screw thread 4. In the present invention, the number of hole expansion threads is not necessarily limited to three. The swivel direction of the hole expanding thread may be the same as or different from the threads on both sides of the hole expanding thread.
In the above-described embodiment, the vocabulary and description used for the number of thread threads, the inclination angle of the hole-expanded thread step, the shape of the screw head, etc. are for the purpose of describing a preferred embodiment of the present invention. It does not impose any restrictions on Therefore, those who are familiar with the field of the present invention can easily come up with changes and effects realized by changing the shape based on the contents disclosed in the present invention. Included in the claims.

１・・・ねじ頭、
１０・・・シャンク、
１１・・・錐状突起部、
１１０・・・尖末端、
１２・・・フランジ、
１３・・・爪歯１、
１４・・・爪歯２、
２・・・ねじ山、
３・・・穴拡大ねじ山、
３Ａ・・・上段部、
３Ｂ・・・下段部、
４・・・穴あけねじ山、
Ａ・・・穴拡大ねじ山の上段部の下向き傾斜角度、
Ｂ・・・穴拡大ねじ山の下段部の上向き傾斜角度。 1 ... Screw head,
10 ... Shank,
11... Conical protrusion,
110 ... apical end,
12 ・・・ Flange,
13 ... nail tooth 1,
14 ... nail teeth 2,
2 ... Thread,
3 ・・・ Hole expansion thread,
3A ... upper stage,
3B ... lower part,
4 ... Drilling thread,
A: Downward tilt angle of the upper step of the hole expansion thread,
B: Upward tilt angle of the lower step of the hole expansion thread.

Claims

A downward-facing conical protrusion where two threads are formed;
A shank that extends above the conical protrusion, has a single thread thread in the middle in the axial direction, and a multi-hole enlarged thread thread in the lower part in the axial direction;
A screw head formed at the upper end of the shank;
With
The hole expansion thread of the shank is formed between the lower end of the single thread of the shank and the upper end of the drilling thread of the conical protrusion,
The hole expansion thread is composed of an upper step portion having a downward inclination angle and a lower step portion having an upward inclination angle,
The downward inclination angle of the upper step portion is smaller than the upward inclination angle of the lower step portion,
The sum of the downward inclination angle of the upper step portion and the upward inclination angle of the lower step portion is 90 degrees or more.

The outer diameter of the upper part of the screw head is larger than the outer diameter of the lower part, and there are a plurality of ring-shaped rings on both the outer periphery of the bottom edge of the flange formed on the upper part of the screw head and the outer periphery of the bottom edge of the lower part of the screw head. The screw according to claim 1, wherein claw teeth are provided.