JPH0148408B2 - - Google Patents
Info
- Publication number
- JPH0148408B2 JPH0148408B2 JP12698884A JP12698884A JPH0148408B2 JP H0148408 B2 JPH0148408 B2 JP H0148408B2 JP 12698884 A JP12698884 A JP 12698884A JP 12698884 A JP12698884 A JP 12698884A JP H0148408 B2 JPH0148408 B2 JP H0148408B2
- Authority
- JP
- Japan
- Prior art keywords
- blades
- drill
- blade
- support member
- metal support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 22
- 239000002023 wood Substances 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
Classifications
-
- 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
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
-
- 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
- F16B25/0031—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 screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
-
- 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
- F16B25/0089—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw having wings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Joining Of Building Structures In Genera (AREA)
- Drilling Tools (AREA)
- Dowels (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、各種建築物、構築物の床あるいは壁
を構成する木材を金属支持部材に取り付けるのに
用いられる羽根付きドリルねじに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bladed drill screw used for attaching wood constituting floors or walls of various buildings and structures to metal supporting members.
従来の技術
この種のドリルねじには、第7図及び第8図に
例示すように、ドリル部25とタツピンねじ部2
2との間に設けた中間軸部26の外周に半径方向
は突出する2つの羽根27が一体的に設けられた
ものが知られている(特公昭43−25402号公報、
米国特許第3358548号、同3699841号明細書及び図
面参照)。BACKGROUND ART This type of drill screw has a drill part 25 and a tuft pin thread part 2, as illustrated in FIGS. 7 and 8.
It is known that two blades 27 that protrude in the radial direction are integrally provided on the outer periphery of an intermediate shaft portion 26 provided between the two blades (Japanese Patent Publication No. 43-25402
(See US Pat. No. 3,358,548, US Pat. No. 3,699,841 and drawings).
上記の羽根付きドリルねじは、第7図のよう
に、そのドリル部25で木材10に下穴を切削す
ると共に、これに続く羽根27のリーマ作用によ
りタツピングねじ部22の外径よりも大きな内径
を有する遊隙穴12を加工し、続いて第8図のよ
うに、ドリル部25が金属支持部材11にねじ下
穴13を切削して貫通したのち、羽根27が金属
支持部材11に当接して破断され、タツピングね
じ部22が金属支持部材11に締結されるように
構成されている。 As shown in FIG. 7, the bladed drill screw described above cuts a pilot hole in the wood 10 with its drill part 25, and has an inner diameter larger than the outer diameter of the tapping screw part 22 due to the reaming action of the blades 27. Then, as shown in FIG. 8, after the drill part 25 cuts and penetrates the screw pilot hole 13 in the metal support member 11, the blade 27 comes into contact with the metal support member 11. The tapping screw portion 22 is configured to be fastened to the metal support member 11.
しかしながら、従来のこの種ドリルねじには次
に述べる問題点がある。 However, this type of conventional drill screw has the following problems.
ドリル部25による木材10の切削に必要な推
力は、金属支持部材11の切削に必要な推力に比
べて非常に小さいので、作業者は木材10に対す
る切削時と、金属支持部材11に対する切削時に
おいて推力を加減しなければならないのである
が、その差が大き過ぎるためややもすると木材1
0に対する切削時の推力が過剰になり易い。この
ため、羽根27が木材10に急激に圧入され、第
7図に示す遊隙穴12の加工途中で破断して全く
用をなさなくなることがしばしばある。また、作
業者が推力を注意深く加減して作業を行なつて
も、木材10が硬質のラワン材であつたり、軟質
系木材であつても木目に掛かつたり節目に当つた
りした場合には、羽根27の早期破断が発生する
ので、実際には羽根27の早期破断を防止するこ
とは非常に困難であつた。 The thrust force required for cutting the wood 10 with the drill part 25 is very small compared to the thrust force necessary for cutting the metal support member 11, so the operator must be careful when cutting the wood 10 and when cutting the metal support member 11. I have to adjust the thrust, but the difference is so large that I end up with 1 piece of wood.
The thrust force during cutting with respect to 0 tends to be excessive. For this reason, the blade 27 is suddenly press-fitted into the wood 10, and often breaks during the machining of the clearance hole 12 shown in FIG. 7, rendering it completely useless. In addition, even if the operator carefully adjusts the thrust while working, even if the wood 10 is made of hard lauan or soft wood, if the wood 10 hits the grain or hits a joint, In practice, it is very difficult to prevent the blades 27 from breaking at an early stage.
このような問題点を解決するために、羽根27
の破断強度を増大すると、ドリル部25が金属支
持部材11を貫通したのち、羽根27が金属支持
部材11に当接しても、通常の推力では容易に破
断せず、ときには羽根27でドリル部25により
切削したねじ下穴13を拡大する欠点がある。 In order to solve these problems, the blade 27
If the breaking strength of the drill part 25 is increased, even if the blade 27 comes into contact with the metal support member 11 after the drill part 25 penetrates the metal support member 11, the blade 27 will not easily break with normal thrust, and sometimes the blade 27 will break the drill part 25. This method has the disadvantage of enlarging the screw hole 13 cut by the screw.
発明が解決しようとする問題点
本発明は、従来の羽根付きドリルねじにおける
上述の問題点を解決することを目的としてなされ
たものである。すなわち、本発明は、従来の羽根
付きドリルねじでは、2つの羽根が同時に金属支
持部材に当接するため、羽根1枚当りに掛かる推
力が半減し、これが羽根の破断強度を大きくした
場合における破断不能の原因になつている点に着
目し、羽根が1枚ずつ順次破断するように構成し
て、羽根1枚当りに掛かる推力を増大せしめ、も
つて羽根の破断を容易ならしめたものである。し
かも、このことによつて、各羽根の破断強度を従
来品の約2倍まで増大することが可能となり、木
材に対する切削加工途中で羽根が不測に破断する
のを有効に防止できるようにしたものである。Problems to be Solved by the Invention The present invention has been made for the purpose of solving the above-mentioned problems in conventional bladed drill screws. That is, in the conventional bladed drill screw, two blades contact the metal support member at the same time, so the thrust applied to each blade is halved, and this increases the blade's breaking strength, making it impossible to break. Focusing on the problem that causes this, the blades are constructed so that they break one by one, increasing the thrust applied to each blade, thereby making it easier to break the blades. Moreover, this makes it possible to increase the breaking strength of each blade to about twice that of conventional products, effectively preventing the blades from breaking unexpectedly during the cutting process on wood. It is.
発明の構成
本発明は、外周にタツピングねじ部2を設けた
シヤンク1の上端に回動工具の係合手段を有する
頭部3が設けられていると共に、下端にドリル部
5が設けられ、更に前記ねじ部2と前記ドリル部
5との間に設けた中間軸部6の外周に半径方向へ
突出する2つの羽根7,8が一体的に設けられて
いる羽根付きドリルねじであつて、前記2つの羽
根7,8の下端が軸方向へずれていて、両羽根の
金属支持部材11に当接して破断される時期に差
を持たせる構成としたことを特徴とする。Structure of the Invention The present invention comprises a shank 1 having a tapping screw part 2 on its outer periphery, a head part 3 having a rotating tool engaging means provided at the upper end thereof, and a drill part 5 provided at the lower end thereof; A bladed drill screw in which two blades 7 and 8 projecting in the radial direction are integrally provided on the outer periphery of an intermediate shaft part 6 provided between the threaded part 2 and the drill part 5, It is characterized in that the lower ends of the two blades 7 and 8 are offset in the axial direction, so that the two blades come into contact with the metal support member 11 and break at different times.
実施例
以下、本発明の実施例を図面に基づいて説明す
る。第1図は本発明の羽根付きドリルねじを示し
ており、外周にタツピングねじ部2を設けたシヤ
ンク1の上端にスクリユードライバーの係合凹部
4を存する頭部3が設けられ、下端にドリル部5
が設けられている。そして、ねじ部2とドリル部
5との間に設けた中間軸部6の外周に半径方向へ
突出する2つの羽根7,8が直径方向に対向して
一体的に形成されるが、両羽根7,8は互いに軸
方向に位置をずらせて設けられ、羽根7の下端7
aが羽根8の下端8aより距離hだけドリル部5
側に近くなつている。また、両羽根7,8の半径
方向長さはねじ部2の最大径より大きくなされて
いる。Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 shows a bladed drill screw of the present invention, in which a shank 1 having a tapping screw portion 2 on its outer periphery is provided with a head 3 having an engagement recess 4 for a screwdriver at the upper end, and a drill screw at the lower end. Part 5
is provided. Two blades 7 and 8 protruding in the radial direction on the outer periphery of the intermediate shaft portion 6 provided between the threaded portion 2 and the drill portion 5 are integrally formed to face each other in the diametrical direction. 7 and 8 are provided to be shifted from each other in the axial direction, and the lower end 7 of the blade 7
a is a distance h from the lower end 8a of the blade 8 on the drill part 5
It's close to the side. Further, the radial length of both blades 7 and 8 is made larger than the maximum diameter of the threaded portion 2.
第3図は、上記構成のドリルねじによる締結工
程の途中を示している。まず、ドリル部5で木材
10に下穴を切削すると共に、これに続く羽根7
及び8のリーマ作用によりねじ部2の外径よりも
大きな内径を有する遊隙穴12が加工される。続
いて、ドリル部5が金属支持部材11にねじ下穴
13を切削して貫通すると、まず羽根7が金属支
持部材11に当接して図示のように破断され、更
にドリル部5が進入すると、少し時間的な差をお
いて羽根8が金属支持部材11に当接し破断され
る。しかるのち、ねじ部2が金属支持部材11の
ねじ下穴13にねじ込まれ、締結が完了する。 FIG. 3 shows the middle of the fastening process using the drill screw of the above configuration. First, the drill part 5 cuts a pilot hole in the wood 10, and the blade 7 that follows this
and 8, a clearance hole 12 having an inner diameter larger than the outer diameter of the threaded portion 2 is formed. Subsequently, when the drill part 5 cuts and penetrates the pre-threaded hole 13 in the metal support member 11, the blade 7 first comes into contact with the metal support member 11 and is broken as shown in the figure, and when the drill part 5 enters further, After a slight time lag, the blade 8 comes into contact with the metal support member 11 and is broken. Thereafter, the threaded portion 2 is screwed into the pre-threaded hole 13 of the metal support member 11, and the fastening is completed.
上述のように、2つの羽根7,8を1つずつ時
期をずらせて破断させると、ドリルねじを圧入す
る推力が同じであつても、2つの羽根が同時に金
属支持部材11に当接する場合に比べて、羽根1
枚当りに掛かる推力が約2倍に増大されることに
なり、したがつて、羽根7,8の破断が容易かつ
確実になる。また、このため各羽根7,8の破断
強度を増大して、木材10に対する切削加工途中
における早期破断を防止することができるのであ
る。 As described above, if the two blades 7 and 8 are broken one at a time at different times, even if the thrust force for press-fitting the drill screw is the same, when the two blades contact the metal support member 11 at the same time, In comparison, feather 1
The thrust force applied to each blade is increased approximately twice, so that the blades 7 and 8 can be easily and reliably broken. Furthermore, it is possible to increase the breaking strength of each blade 7, 8 and prevent early breakage during cutting of the wood 10.
更に、側先に金属支持部材11に当接する羽根
7は、ドリル部5が金属支持部材11を貫通した
直後の大きな慣性力によつて金属支持部材11に
当接せしめられるから、一層破断され易いのであ
る。したがつて、その破断強度を羽根8より大き
くしても容易に確実に破断させることが可能であ
る。 Furthermore, the blades 7 that come into contact with the metal support member 11 at the side tips are brought into contact with the metal support member 11 by a large inertial force immediately after the drill portion 5 penetrates the metal support member 11, and are therefore more likely to break. It is. Therefore, even if the breaking strength is made larger than that of the blade 8, it is possible to easily and reliably break the blade.
第4図ないし第6図はこのような点を考慮した
実施例を示しており、第4図の例では、先に金属
支持部材11に当接する羽根7を他方の羽根8よ
り長くして、その破断強度を大きくしてある。ま
た、第5図及び第6図に示す例では、羽根7の厚
みを羽根8のそれよりも大きくして、その破断強
度を増大したものである。 FIGS. 4 to 6 show embodiments that take these points into consideration. In the example shown in FIG. 4, the blade 7 that contacts the metal support member 11 first is made longer than the other blade 8, and Its breaking strength is increased. In the example shown in FIGS. 5 and 6, the thickness of the blade 7 is made larger than that of the blade 8 to increase its breaking strength.
発明の効果
以上説明したように、本発明によれば、ねじ部
2とドリル部5との間に設けた中間軸部6の外周
に突設する2つの羽根7,8の下端を軸方向へず
らせることにより、両羽根7,8の金属支持部材
11に当接して破断される時期に差を持たせ、2
つの羽根が1つずつ破断されるように構成したか
ら、羽根1枚当りに対する推力が増大され羽根の
破断を容易かつ確実にすることができる。また、
このことによつて、各羽根の破断強度を増大する
ことが可能となり、木材に対する切削加工途中に
おいて羽根が早期破断するのを有効に防止できる
効果がある。Effects of the Invention As explained above, according to the present invention, the lower ends of the two blades 7 and 8 protruding from the outer periphery of the intermediate shaft portion 6 provided between the threaded portion 2 and the drill portion 5 are moved in the axial direction. By shifting the blades 7 and 8, the timing at which the blades 7 and 8 contact the metal support member 11 and break is different, and
Since the blades are constructed so that they are broken one by one, the thrust per blade is increased and the blades can be broken easily and reliably. Also,
This makes it possible to increase the breaking strength of each blade, and has the effect of effectively preventing premature breakage of the blades during the cutting process on wood.
第1図は本発明に係る羽根付きドリルねじの正
面図、第2図は第1図の2−2′線に沿う断面図、
第3図は同締結工程を示す要部縦断正面図、第4
図は別の実施例を示す要部正面図、第5図は更に
別の実施例の要部正面図、第6図は第5図の6−
6′線に沿う断面図、第7図及び第8図は従来品
の締結工程を示す要部縦断正面図である。
1……シヤンク、2……タツピングねじ部、3
……頭部、5……ドリル部、6……中間軸部、
7,8……羽根、7a,8a……羽根の下端、1
0……木材、11……金属支持部材。
FIG. 1 is a front view of a bladed drill screw according to the present invention, FIG. 2 is a sectional view taken along line 2-2' in FIG. 1,
Figure 3 is a longitudinal sectional front view of the main part showing the same fastening process, Figure 4
The figure is a front view of main parts showing another embodiment, FIG. 5 is a front view of main parts of still another embodiment, and FIG. 6 is a front view of main parts of another embodiment.
A sectional view taken along the line 6', and FIGS. 7 and 8 are longitudinal sectional front views of main parts showing the fastening process of the conventional product. 1...Shank, 2...Tapping screw part, 3
...Head, 5...Drill part, 6...Intermediate shaft part,
7, 8...Blade, 7a, 8a...Lower end of the blade, 1
0...Wood, 11...Metal support member.
Claims (1)
の上端に回動工具の係合手段を有する頭部3が設
けられると共に、下端にドリル部5が設けられ、
更に前記ねじ部2と前記ドリル部5との間に設け
た中間軸部6の外周に半径方向へ突出する2つの
羽根7,8が一体的に設けられている羽根付きド
リルねじであつて、 前記2つの羽根7,8の下端が軸方向へずれて
いて、両羽根の金属支持部材11に当接して破断
される時期に差を持たせる構成としたことを特徴
とする羽根付きドリルねじ。 2 前記2つの羽根のうち、下端が前記ドリル部
5により近い方の羽根7の破断強度が、他方の羽
根8の破断強度より大きくなつている特許請求の
範囲第1項記載の羽根付きドリルねじ。[Claims] 1. A shank 1 having a tuft pin screw portion 2 on its outer periphery.
A head 3 having an engaging means for a rotary tool is provided at the upper end, and a drill portion 5 is provided at the lower end,
Furthermore, the bladed drill screw is provided with two blades 7 and 8 integrally provided on the outer periphery of an intermediate shaft part 6 provided between the threaded part 2 and the drill part 5, which protrude in the radial direction, The bladed drill screw is characterized in that the lower ends of the two blades 7 and 8 are offset in the axial direction so that the blades come into contact with the metal support member 11 and break at different times. 2. The bladed drill screw according to claim 1, wherein of the two blades, the blade 7 whose lower end is closer to the drill part 5 has a breaking strength greater than the breaking strength of the other blade 8. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12698884A JPS616415A (en) | 1984-06-20 | 1984-06-20 | Drill screw with blade |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12698884A JPS616415A (en) | 1984-06-20 | 1984-06-20 | Drill screw with blade |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS616415A JPS616415A (en) | 1986-01-13 |
JPH0148408B2 true JPH0148408B2 (en) | 1989-10-19 |
Family
ID=14948875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12698884A Granted JPS616415A (en) | 1984-06-20 | 1984-06-20 | Drill screw with blade |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS616415A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6244124U (en) * | 1985-09-05 | 1987-03-17 | ||
JPS63187714U (en) * | 1987-05-26 | 1988-12-01 | ||
JPH01150212U (en) * | 1988-04-11 | 1989-10-17 | ||
DE102006034584A1 (en) * | 2006-07-26 | 2008-01-31 | Ejot Gmbh & Co. Kg | Hole and thread forming screw |
US10473137B2 (en) * | 2016-10-07 | 2019-11-12 | Illinois Tool Works Inc. | Winged threaded fastener |
-
1984
- 1984-06-20 JP JP12698884A patent/JPS616415A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS616415A (en) | 1986-01-13 |
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