JPH036365B2 - - Google Patents
Info
- Publication number
- JPH036365B2 JPH036365B2 JP60209573A JP20957385A JPH036365B2 JP H036365 B2 JPH036365 B2 JP H036365B2 JP 60209573 A JP60209573 A JP 60209573A JP 20957385 A JP20957385 A JP 20957385A JP H036365 B2 JPH036365 B2 JP H036365B2
- Authority
- JP
- Japan
- Prior art keywords
- reverse
- thread
- screw
- threaded portion
- shavings
- 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 - Lifetime
Links
- 238000010079 rubber tapping Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 description 18
- 229910052602 gypsum Inorganic materials 0.000 description 10
- 239000010440 gypsum Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000005553 drilling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000025174 PANDAS Diseases 0.000 description 1
- 208000021155 Paediatric autoimmune neuropsychiatric disorders associated with streptococcal infection Diseases 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000004080 punching Methods 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
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0078—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw with a shaft of non-circular cross-section or other special geometric features of the shaft
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明は、石こうボード、けい酸カルシウム
板、プラスタボード等の壁、天井材を鋼製下地材
に取り付けるのに適するタツピングねじに関す
る。このタツピングねじには、あらかじめ開けら
れた下孔に対してタツピングを行ないながらねじ
の締付を行うタツピングねじ及び、ドリル機能を
有するねじの先端部によつて自ら下孔を開け、タ
ツピング及びねじの締付を行うセルフドリリン
グ、タツピングねじが含まれる。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tapping screw suitable for attaching wall and ceiling materials such as gypsum board, calcium silicate board, plaster board, etc. to a steel base material. These tapping screws include tapping screws that tighten the screw by tapping into a pre-drilled pilot hole, and tapping screws that tighten the screw by tapping into a pre-drilled pilot hole, and tapping screws that tighten the screw by tapping into a pre-drilled pilot hole. Includes self-drilling and tapping screws for tightening.
＜従来の技術＞
従来、この種のタツピングねじとしては、特公
昭52−180号に記載のねじが知られている。この
ねじは、第６図に示すように、頭部１０１と軸部
１０２とを有し、軸部１０２の先端側には、ドリ
リング、タツピング機能を有するねじ部１０３が
形成されている。頭部１０１は、環状のさらい面
１０４と、この基端側の端縁１０５と、これに連
続するラツパ状の曲面１０６とを有する。この頭
部の形状は、紙でふちどりした石こうボードにタ
ツピングねじをねじ込む際に石こうボードの表面
に出て来る紙のぎざぎざ（paper burrs）或いは
紙のまくれ（paper burrs）と呼ばれる紙の切り
屑を頭部の内側に押し込むのに有利である。<Prior Art> Conventionally, as this type of tapping screw, the screw described in Japanese Patent Publication No. 52-180 has been known. As shown in FIG. 6, this screw has a head 101 and a shaft portion 102, and a threaded portion 103 having drilling and tapping functions is formed on the distal end side of the shaft portion 102. The head 101 has an annular cleaning surface 104, an end edge 105 on the proximal side of the annular cleaning surface 104, and a truss-shaped curved surface 106 continuous to the end edge 105. The shape of this head is designed to remove paper chips called paper burrs or paper burrs that appear on the surface of a plasterboard when screwing a tapping screw into a plasterboard edged with paper. It is advantageous to push it inside the head.
ところが、このタツピングねじは、石こうボー
ドから出るパウダー状の削り粉に関しては充分な
配慮がなされていない。即ち第６図に示すよう
に、タツピングねじは、石こうボードＡ及び鋼製
下地材Ｂにドリリングを行ないながらねじ込まれ
ていく。このとき、石こうボードＡからはパウダ
ー状の削り粉が出る。このパウダー状の削り粉
は、初期の段階、即ち、タツピングねじの先端が
石こうボードＡ及び鋼製下地材Ｂを貫ぬくまでの
段階において、通常の切り粉と同様外部に排出さ
れる。この排出は、タツピングねじが被締付体
Ａ，Ｂ内にねじ込まれるのに必要なものである。
（以下この排出を必要排出という。）
ところが、問題は、必要排出以上のパウダー状
の削り粉が排出される点に有る。即ち、上記の初
期段階以降、ねじが完全にねじ込まれるまでの間
にもパウダー状の削り粉が排出されてしまうので
ある。これは、石こうボードが鋼板と異なり極め
てもろいため、タツピング及びねじ込み中に石こ
うボードの組織がパウダー状になつて崩れてゆ
き、どんどん下孔Ｃが大きくなつていくことによ
る。このパウダー状の削り粉は、軸部１０２と下
孔Ｃの壁面間にたまると共に、軸部１０２の無ね
じ部１０７と下孔Ｃとの間から外部へ排出されて
ゆく。特に、第６図に示すように、天井材の取り
付けの場合、パウダー状の削り粉は一層激しく外
部に排出されてしまう（以下、この間の排出を不
用排出という）。 However, with this tapping screw, sufficient consideration has not been given to the powder-like shavings generated from the gypsum board. That is, as shown in FIG. 6, the tapping screws are screwed into the gypsum board A and the steel base material B while being drilled. At this time, powdery shavings come out from the plasterboard A. This powdery shavings are discharged to the outside in the same way as normal shavings at the initial stage, that is, until the tip of the tapping screw penetrates the gypsum board A and the steel base material B. This discharge is necessary for the tapping screws to be screwed into the bodies A, B to be tightened.
(Hereinafter, this discharge will be referred to as necessary discharge.) However, the problem is that more powder-like shavings are discharged than the necessary discharge. That is, after the above-mentioned initial stage, powder-like shavings are discharged even before the screw is completely screwed in. This is because, unlike a steel plate, the gypsum board is extremely brittle, so during tapping and screwing, the structure of the gypsum board becomes powdery and crumbles, causing the prepared hole C to become larger and larger. This powdery shavings accumulates between the wall surface of the shaft portion 102 and the pilot hole C, and is discharged from between the unthreaded portion 107 of the shaft portion 102 and the pilot hole C to the outside. Particularly, as shown in FIG. 6, when ceiling materials are installed, the powdery shavings are more vigorously discharged to the outside (hereinafter, discharge during this period is referred to as unnecessary discharge).
かくして、必要排出及び不用排出を合わせたパ
ウダー状の削り粉の排出量は多量なものとなり、
これらの削り粉は粉塵となつて空気中を漂い、作
業場内に充満する。そのため、作業者は防塵マス
クを着用する必要が有ることはもちろん、天井材
の取り付け作業中には、上から降りそそぐ削り粉
に悩まされながら作業をつづけなければならな
い。 In this way, the amount of powdered shavings discharged, including the necessary discharge and unnecessary discharge, is large.
These shavings become dust and float in the air, filling the workplace. Therefore, not only do workers need to wear dust masks, but they also have to continue working while being bothered by the shavings that fall from above while installing ceiling materials.
そこで出願人は、この種のタツピングねじに関
し、特開昭52−109070号公報記載のねじを提案し
た。このねじは、第７図に示すように、頭部２０
１と軸部２０２とを有し、軸部２０２の先端側に
はドリル機能及びタツピング機能を有する推進ね
じ２０３が設けられ、基端側には逆ねじ２０４が
設けられている。逆ねじ２０４は、その外径が推
進ねじ２０３の外径より大きく形成されている。
この逆ねじ２０４は、下孔Ｃに係合し、不用排出
のパウダー状の削り粉が外部に排出されるのを防
止すると共に、逆ねじ２０４が石こうボードＡ内
に入つていく間、逆ねじの作用によりパウダー状
の削り粉を上方へ運び上げる働きを行う。又、前
記の紙の切り屑に対しても逆ねじ２０４の作用に
より、これを下孔Ｃ内に押し込める効果がある。 Therefore, the applicant proposed a screw described in Japanese Patent Application Laid-Open No. 109070/1983 regarding this type of tapping screw. This screw has a head 20 as shown in FIG.
1 and a shaft portion 202, a propelling screw 203 having a drilling function and a tapping function is provided on the distal end side of the shaft portion 202, and a reverse thread 204 is provided on the proximal end side. The reverse thread 204 has an outer diameter larger than the outer diameter of the propulsion thread 203.
This reverse screw 204 engages with the pilot hole C and prevents unnecessary discharged powder-like shavings from being discharged to the outside. The action of this works to carry the powdery shavings upward. Furthermore, the effect of the reverse screw 204 on the paper scraps described above can be pushed into the prepared hole C.
ところが、このタツピングねじにおいても次の
ような問題点が有る。即ち、逆ねじ２０４の基端
に２０５において、逆ねじ２０４の山の高さが漸
次低くなつているため、逆ねじの最終段階におい
てパウダー状の削り粉がこぼれてしまうという問
題である。この問題は下記の製造上の問題に由来
する。即ち、これらのタツピングねじは、転造ダ
イスにより量産されるが、逆ねじ山の高さをその
終端まで高い状態で維持し、急激に０まで減少さ
せた場合、転造によりへこんだ谷部の体積と盛り
上がつた山部の体積とを等しくすることが出来な
くなり、ねじの転造が不可能になるのである。そ
の結果、逆ねじ２０４の山の高さを漸次低くせざ
るを得なかつたものである。 However, this tapping screw also has the following problems. That is, since the height of the crest of the reverse thread 204 is gradually lowered at the base end 205 of the reverse thread 204, there is a problem that powder-like shavings are spilled at the final stage of the reverse thread. This problem stems from the manufacturing problem described below. In other words, these tapping screws are mass-produced using rolling dies, but if the height of the reverse thread is maintained high until the end and then rapidly decreased to 0, the height of the troughs depressed by rolling will be reduced. It becomes impossible to make the volume equal to the volume of the raised peak, and it becomes impossible to roll the screw. As a result, the height of the ridges of the reverse thread 204 had to be gradually lowered.
さらに、従来の他の例として、特開昭58−
94613号に記載されたタツピングねじを挙げるこ
とができる。このねじは、第８図に示すように、
頭部３０１と軸部３０２とを有し、軸部３０２の
先端側３０４にはフランジ３０５……が形成され
ている。また頭部３０１は、凹曲面３０６を有す
る。 Furthermore, as another conventional example, JP-A-58-
Mention may be made of the tapping screw described in No. 94613. This screw, as shown in Figure 8,
It has a head portion 301 and a shaft portion 302, and a flange 305 is formed on the distal end side 304 of the shaft portion 302. Further, the head 301 has a concave curved surface 306.
このねじは、前記の紙の切り屑をフランジ３０
５……及び凹曲面３０６によつて下孔Ｃ内に押し
込めるという効果がある。ところがパウダー状の
削り粉の不用排出に対しては充分な効果を期待で
きない。即ち、フランジのみでは紙の切り屑を押
し上げることができても、逆ねじのように、パウ
ダー状の削り粉を運び上げることはできない。そ
して、パウダー状の削り粉はフランジ３０５……
間の無ねじ部分３０７からこぼれ落ちたり飛散し
たりしてしまう。 This screw removes the paper scraps from the flange 30.
5... and the concave curved surface 306 has the effect of being able to be pushed into the prepared hole C. However, it cannot be expected to have a sufficient effect on unnecessary discharge of powdery shavings. That is, even if the flange alone can push up paper shavings, it cannot lift up powdery shavings like a reverse thread. And the powder-like shavings are on the flange 305...
It will spill or scatter from the unthreaded portion 307 between them.
＜発明が解決しようとする問題点＞
そこで本発明は、パウダー状の削り粉の飛散、
特に不用排出を出来るかぎり少なくしたタツピン
グねじを提供せんとする。<Problems to be solved by the invention> Therefore, the present invention solves the problem of scattering of powdery shavings,
In particular, it is an object of the present invention to provide a tapping screw with as little unnecessary discharge as possible.
特に、ねじが頭部付近にまで石こうボードにね
じ込まれた際、ねじの軸部に溜められたパウダー
状の削り粉がこぼれたり、飛散したりすることを
防がんとする。 In particular, when the screw is screwed into the gypsum board near the head, the powdery shavings accumulated on the shaft of the screw are prevented from spilling or scattering.
＜問題点を解決するための手段＞
かくして、本発明は下記の構成を有するタツピ
ングねじを提供することにより、上記の問題点を
解決する。<Means for Solving the Problems> Thus, the present invention solves the above problems by providing a tapping screw having the following configuration.
このタツピングねじは、軸部１とその基端に設
けられた頭部２とからなる。軸部の先端側には１
条以上のねじ山３，４が形成された推進ねじ部分
５を有し、軸部の基端側には推進ねじ部分５のね
じ山３，４と逆方向に進む１条以上の逆ねじ山８
が形成された逆ねじ部分７を有する。この推進ね
じ部分５と逆ねじ部分７との間には無ねじ部分６
を有し、この無ねじ部分６の径が推進ねじ部分５
の谷径より大きく設定されている。又、上記逆ね
じ部分７の逆ねじ山８の外径は上記推進ねじ部分
５のねじ山３，４の外径とほぼ等しいか或いはそ
れより大きく設定され、この逆ねじ山８の基端９
がほぼ一定のねじ山高さを保つた状態でリード角
０度のつば状の山１０に連続している。このつば
状の山１０は軸部の周囲を一周していると共に、
つば状の山１０の外径が逆ねじ山８の外径とほぼ
等しいか或いはそれより大きく設定されている。 This tapping screw consists of a shaft portion 1 and a head portion 2 provided at its base end. 1 on the tip side of the shaft
It has a propulsion thread part 5 in which threads 3, 4 of more than one thread are formed, and one or more reverse threads running in the opposite direction to the threads 3, 4 of the propulsion thread part 5 on the base end side of the shaft part. 8
It has a reverse threaded portion 7 formed therein. A non-threaded portion 6 is provided between the propelling screw portion 5 and the reverse screw portion 7.
The diameter of this non-threaded portion 6 is the same as that of the propulsion threaded portion 5.
The diameter of the valley is set larger than the diameter of the valley. Further, the outer diameter of the reverse thread 8 of the reverse thread portion 7 is set to be approximately equal to or larger than the outer diameter of the threads 3 and 4 of the propulsion thread portion 5, and the base end 9 of the reverse thread 8
is continuous to a collar-shaped thread 10 with a lead angle of 0 degrees while maintaining a substantially constant thread height. This brim-shaped peak 10 goes around the shaft part, and
The outer diameter of the collar-like thread 10 is set to be approximately equal to or larger than the outer diameter of the reverse thread thread 8.
＜作用＞
このタツピングねじは、パウダー状の削り粉の
排出を行いながら、石こうボードＡ等の天井、壁
材にドリリング及びタツピングを行いつつねじ込
まれていく。<Function> This tapping screw is screwed into ceiling and wall materials such as plasterboard A while performing drilling and tapping while discharging powdery shavings.
この際、推進ねじ部分の基端側には、その谷径
より大きな径を有する無ねじ部分６が形成されて
いるため、推進ねじ部分のねじ込み中に生ずる削
り粉を受けとめて、推進ねじ部分と下孔Ｃ壁面と
の間にとじ込めることができ、推進ねじ部分５の
ねじ込み中の排出量を減少させることができる。
さらに、逆ねじ部分７にまでねじ込みが進むと、
削り粉の不用排出分は、逆ねじ部分７と下孔Ｃと
の間に溜められる。しかも逆ねじ山８は下孔に係
合し、スクリユーコンベアに類する作用を果し、
パウダー状の削り粉を上方（ねじの先端方向）に
運び上げる働きを行う。又さらに、逆ねじ山８の
基端９においては、パウダー状の削り粉が、つば
状の山１０に受け止められる。そして、つば状の
山１０に載つたパウダー状の削り粉は、これに連
続する逆ねじ８にすくい上げられ、上方に運ばれ
るものであり、削り粉の総排出量を著しく減少さ
せることができるものである。 At this time, since a non-threaded part 6 having a diameter larger than the root diameter is formed on the proximal end side of the propulsion screw part, it receives the shavings generated during screwing of the propulsion screw part and connects it to the propulsion screw part. It can be confined between the lower hole C and the wall surface, and the amount of discharge during screwing of the propelling screw portion 5 can be reduced.
Furthermore, when the screwing progresses to the reverse threaded part 7,
Unnecessary discharged shavings are collected between the reverse threaded portion 7 and the pilot hole C. Moreover, the reverse thread 8 engages with the pilot hole and performs a function similar to a screw conveyor.
It works to carry powdery shavings upwards (toward the tip of the screw). Furthermore, at the base end 9 of the reverse thread 8, powder-like shavings are received by the collar-shaped ridge 10. The powdery shavings placed on the brim-shaped mountain 10 are scooped up by the continuous reverse screw 8 and carried upwards, which can significantly reduce the total amount of shavings discharged. It is.
＜実施例＞ 以下図に基づき、本発明の実施例を説明する。<Example> Embodiments of the present invention will be described below based on the figures.
第１図は、実施例のタツピングねじの側面図で
あり、このねじは、軸部１とその基端側に設けら
れた頭部２とを有する。軸部１の先端側には、二
条のねじ山３，４を有する推進ねじ部分５が形成
されている。この推進ねじ部分５は、石こうボー
ド及び鋼製下地材に自ら下孔を開けるドリリング
機能及びその下孔にねじを立てるタツピング機能
を有する。この実施例では、推進ねじ部分５を二
条ねじとしたが、１条ねじ、３条ねじとすること
もできる。また、先端に、ツイストドリルに近似
した形状を有するドリル部を、パンチングダイス
により鍛造してもよい。 FIG. 1 is a side view of a tapping screw according to an embodiment, and this screw has a shaft portion 1 and a head portion 2 provided on the proximal end side thereof. A propulsion screw portion 5 having two threads 3 and 4 is formed on the distal end side of the shaft portion 1 . This propelling screw portion 5 has a drilling function to make a pilot hole in the gypsum board and steel base material by itself, and a tapping function to set a screw in the pilot hole. In this embodiment, the propulsion screw portion 5 is a double thread, but it may also be a single thread or a triple thread. Alternatively, a drill portion having a shape similar to a twist drill may be forged at the tip using a punching die.
推進ねじ部分５の基端側には、無ねじ部分６を
介して逆ねじ部分７が設けられている。無ねじ部
分６の長さは自由であり、その径は、推進ねじ部
分５の谷径より大きく設定されている。逆ねじ部
分７の谷径は、推進ねじ部分５の谷径より小さ
い。この逆ねじ部分７には、推進ねじ部分５のね
じ山３，４と逆方向に進む一条の逆ねじ山８が形
成されている。この逆ねじ山８の条数は適宜変化
させ得る。逆ねじ山８の外径は、ねじ山３，４の
外径より大きくなされているが、これとほぼ等し
くしてもよい。 A reverse threaded portion 7 is provided on the base end side of the propulsion threaded portion 5 via a non-threaded portion 6 . The length of the non-threaded portion 6 is free, and its diameter is set larger than the root diameter of the propulsion threaded portion 5. The root diameter of the reverse threaded portion 7 is smaller than the root diameter of the propulsion threaded portion 5. This reverse threaded portion 7 is formed with a single reverse thread 8 running in the opposite direction to the threads 3 and 4 of the propulsion threaded portion 5. The number of threads of this reverse thread 8 can be changed as appropriate. Although the outer diameter of the reverse thread 8 is made larger than the outer diameter of the threads 3 and 4, it may be approximately equal to this.
逆ねじ山８は、その基端９において、つば状の
山１０に連続している。このつば状の山１０は、
リード角０度、即ち、つば状の山１０の最大外周
を含む平面が軸部１の軸心に対して直交する平面
にあり、軸部の周囲を一周している。そして、逆
ねじ部分７と軸部の基端部分１１との境界に、こ
のつば状の山１０が位置している。詳しく言え
ば、第２図に示すように、つば状の山１０の先端
側の面（進み側フランク）１２が逆ねじ部分７の
谷に連続しており、基端側の面（追い側フラン
ク）１３は基端部分１１に連続している。このつ
ば状の山１０の外径は、逆ねじ山８の外径と等し
く、逆ねじ山８の基端９は、その外径を減少する
ことなく、つば状の山１０に連続している。 The reverse thread 8 is continuous with a collar-shaped thread 10 at its proximal end 9 . This brim-shaped mountain 10 is
The lead angle is 0 degrees, that is, the plane including the maximum outer circumference of the brim-like peak 10 is on a plane perpendicular to the axis of the shaft 1 and goes around the shaft. This collar-shaped peak 10 is located at the boundary between the reverse threaded portion 7 and the base end portion 11 of the shaft portion. More specifically, as shown in FIG. ) 13 is continuous with the proximal portion 11. The outer diameter of this collar-shaped thread 10 is equal to the outer diameter of the reverse thread thread 8, and the base end 9 of the reverse thread thread 8 is continuous with the collar-shaped thread 10 without reducing its outer diameter. .
基端部分１１は、つば状の山１０の基端側から
頭部２にかけて延びる無ねじ部分である。この実
施例では、基端部分１１の径は、逆ねじ部分７の
谷径より大きいが、これと等しくすることも可能
である。又、この実施例では、基端部分１１に、
つば状の山１０の外径より大きな外径を有するフ
ランジ１４が設けられている。このフランジ１４
は、リード角０度であり、基端部分１１の周囲を
一周している。 The base end portion 11 is a non-threaded portion extending from the base end side of the brim-shaped peak 10 to the head 2. In this embodiment, the diameter of the proximal end portion 11 is larger than the root diameter of the reverse threaded portion 7, but it can also be made equal to this. Further, in this embodiment, the proximal end portion 11 includes:
A flange 14 is provided which has an outer diameter larger than the outer diameter of the collar-like peak 10. This flange 14
has a lead angle of 0 degrees and goes around the proximal end portion 11 once.
頭部２は、軸部１の基端部分１１から大きく広
がるラツパ状の座面１５を有する。頭部２の上面
は、平らであり、中央に、ドライバー等の締付工
具を受容する十字穴１６を有する。 The head 2 has a seat surface 15 in the shape of a truss that widens widely from the base end portion 11 of the shaft portion 1 . The top surface of the head 2 is flat and has a cross recess 16 in the center for receiving a tightening tool such as a screwdriver.
次に第２図に基づき、このタツピングねじの使
用状態を説明する。タツピングねじは、従来例と
同様鋼製下地材に石こうボードＡ等の天井材を取
り付ける際に用いられ、第２図は、鋼製下地材
（図示せず）をタツピングねじの先端がすでに貫
ぬき、パウダー状の削り粉の必要排出が終了した
後、推進ねじ部分５及び逆ねじ部分７が石こうボ
ードＡ内にねじ込まれている状態を示す。このと
き、パウダー状の削り粉Ｄの不要排出分は、軸部
１と下孔Ｃとの間に溜つている。 Next, the usage state of this tapping screw will be explained based on FIG. Tapping screws are used when attaching a ceiling material such as gypsum board A to a steel base material, as in the conventional example, and Figure 2 shows that the tip of the tapping screw has already penetrated the steel base material (not shown). , after the necessary evacuation of powdery shavings has been completed, the propulsion threaded part 5 and the reverse threaded part 7 are shown screwed into the plasterboard A. At this time, unnecessary discharged powdery shavings D accumulates between the shaft portion 1 and the prepared hole C.
ここで、第２図の状態に至るまでの作用を説明
しておくと、まず、ねじは、先端側の推進ねじ部
分５からねじ込みが行なわれる。この際、推進ね
じ部分の基端側には、その谷径より大きな径を有
する無ねじ部分６が形成されているため、推進ね
じ部分のねじ込み中に生ずる削り粉を受けとめ
て、推進ねじ部分と下孔Ｃ壁面との間にとじ込め
ることができる。これにより推進ねじ部分５のね
じ込み中における削り粉の排出量を減少させるこ
とができ、逆ねじ部分７に至る削り粉Ｄの量自体
を減少させることができる。 Here, the operation up to the state shown in FIG. 2 will be explained. First, the screw is screwed in from the propelling screw portion 5 on the distal end side. At this time, since a non-threaded part 6 having a diameter larger than the root diameter is formed on the proximal end side of the propulsion screw part, it receives the shavings generated during screwing of the propulsion screw part and connects it to the propulsion screw part. It can be trapped between the hole C and the wall surface. This makes it possible to reduce the amount of shavings discharged during screwing of the propulsion threaded portion 5, and to reduce the amount of shavings D reaching the reverse threaded portion 7 itself.
そして、第２図の状態では、逆ねじ部分７の谷
径が小さいため、下孔Ｃと逆ねじ部分７の谷との
間の空間が大きくなり、削り粉Ｄを溜るために充
分な容量を確保するのに有利である。 In the state shown in Fig. 2, since the diameter of the valley of the reverse threaded portion 7 is small, the space between the pilot hole C and the valley of the reverse threaded portion 7 becomes large, and has a sufficient capacity to collect the shavings D. It is advantageous to secure.
しかも逆ねじ山８は、下孔Ｃと係合し、削り粉
Ｄが下孔Ｃ外に出るのを防止すると共に、スクリ
ユーコンベアに類する作用により削り粉Ｄを上方
（ねじの先端方向）に運び上げる。しかも逆ねじ
山８の基端９は、ほぼ一定の山の高さを保つた状
態で、つば状の山１０に連続している。従つて、
つば状の山１０の上に載つた削り粉Ｄは、つば状
の山１０に連続している逆ねじ山の基端９によつ
てすくい上げられ、上方に運ばれる。その結果、
逆ねじ部分７からこぼれたり、飛散したりする削
り粉Ｄの量を極力少なくすることができる。 In addition, the reverse thread 8 engages with the pilot hole C, prevents the shavings D from coming out of the pilot hole C, and also pushes the shavings D upward (toward the tip of the screw) by an action similar to a screw conveyor. carry it up Moreover, the base end 9 of the reverse screw thread 8 is continuous with the collar-shaped thread 10 while maintaining a substantially constant thread height. Therefore,
The shavings D placed on the brim-shaped peak 10 are scooped up by the base end 9 of the reverse screw thread continuous with the brim-shaped peak 10, and are carried upward. the result,
The amount of shavings D spilling or scattering from the reverse threaded portion 7 can be minimized.
次に、この実施例のねじの製造方法を説明する
に、このねじはａ，ｂ，ｃの三つの部分を形成す
る３種のダイスを接合してなる１個のダイスより
転造される。ａの部分は、２条ねじダイスによ
り、ｂの部分は逆ねじダイスにより、ｃの部分は
リングダイスにより形成される。 Next, the method of manufacturing the screw of this embodiment will be explained. This screw is rolled using a single die formed by joining three types of dies forming three parts a, b, and c. Part a is formed by a double thread die, part b by a reverse thread die, and part c by a ring die.
この転造の際、逆ねじ部分７のへこんだ谷部の
素材は、逆ねじ山８の方に流れ、盛り上つた山を
形成する。そして、逆ねじ部分の基端側において
は、素材が逆ねじ山８の基端９及びつば状の山１
０に流れ、各山を形成する。その結果、逆ねじ山
８の山の高さを急激に０にした場合のように、へ
こんだ谷部の体積と盛り上つた山部の体積とが大
きく異なるということはなく、両体積を等しくな
るようにダイスを設計することが可能となる。但
し、素材の流れの状況により、逆ねじ山８の外径
を若干減少させる必要が生ずる場合も有るが、そ
の場合においても、逆ねじ山８の基端９がつば状
の山１０に接していることは、必須条件である。 During this rolling, the material in the concave valley of the reverse threaded portion 7 flows toward the reverse thread thread 8, forming a raised crest. Then, on the proximal end side of the reverse threaded portion, the material is the base end 9 of the reverse thread 8 and the collar-shaped crest 1.
0, forming each mountain. As a result, unlike when the height of the reverse thread 8 is suddenly reduced to 0, the volume of the concave valley and the volume of the raised peak do not differ greatly, but both volumes are equalized. It becomes possible to design a die so that However, depending on the flow of the material, it may be necessary to slightly reduce the outer diameter of the reverse thread 8; Being present is a necessary condition.
以上の実施例の他、本発明はその特許請求の範
囲に記載された範囲内において変更し得る。 In addition to the embodiments described above, the present invention may be modified within the scope of the claims.
例えば、第３図に示すように、逆ねじ部分７の
谷径を、推進ねじ部分５の谷径と等しくしてもよ
い。この場合、下孔Ｃと逆ねじ部分７の谷との間
の空間は前記実施例に比して若干小さくなるが、
逆ねじ部分７の強度は向上する。従つて、鋼製下
地材の厚みが大きく、タツピングねじが鋼製下地
材を貫く際のトルクが大きくなる場合には、逆ね
じ部分７の谷径を大きくすれば良い。尚、削り粉
Ｄを溜めるための容量は、逆ねじ部分７の長さを
長くすることにより、大きくすることができる。 For example, as shown in FIG. 3, the root diameter of the reverse threaded portion 7 may be made equal to the root diameter of the propelling threaded portion 5. In this case, the space between the pilot hole C and the valley of the reverse threaded portion 7 will be slightly smaller than in the above embodiment, but
The strength of the reverse threaded portion 7 is improved. Therefore, if the thickness of the steel base material is large and the torque required when the tapping screw penetrates the steel base material is large, the root diameter of the reverse threaded portion 7 may be increased. Incidentally, the capacity for storing the shavings D can be increased by increasing the length of the reverse threaded portion 7.
又、第４図に示すように、逆ねじ部分７の谷径
を、基端付近において大きくしてもよい。尚、こ
の実施例においては、第１図の実施例におけるフ
ランジ１４は形成されていない。又、図示はしな
いが、逆ねじ山８の外径を基端に向うに従がい漸
次大きくしてもよい。 Further, as shown in FIG. 4, the root diameter of the reverse threaded portion 7 may be increased near the base end. In this embodiment, the flange 14 in the embodiment of FIG. 1 is not formed. Although not shown, the outer diameter of the reverse thread 8 may be gradually increased toward the base end.
次に第５図はさらに他の実施例を示し、このね
じは、逆ねじ部分７の谷径と基端部分１１の径と
を等しくし、かつその両者を推進ねじ部分５の谷
径よりも小さくしたものである。尚このねじにお
いては、フランジ１４の径が、つば状の山１０の
径と等しくなされている。さらに、つば状の山１
０及びフランジ１４の山の角度は適宜変更すれば
良いが、先端側の面１２は、ねじの軸心と直交さ
せることが理想的である。又、つば状の山１０の
径は、逆ねじ８の外径よりも等しくか、或はそれ
よりも大きいことが望ましいがねじの転造時にお
ける素材の流れを考慮して、つば状の山１０の径
が逆ねじ山８の外径より若干小さくなることもあ
り得る。 Next, FIG. 5 shows still another embodiment, in which the root diameter of the reverse threaded portion 7 and the diameter of the proximal end portion 11 are made equal, and both are made larger than the root diameter of the propelling threaded portion 5. It is a smaller version. In this screw, the diameter of the flange 14 is made equal to the diameter of the collar-shaped crest 10. Furthermore, the spit-shaped mountain 1
0 and the angle of the flange 14 may be changed as appropriate, but it is ideal that the surface 12 on the tip side is perpendicular to the axis of the screw. The diameter of the collar-shaped crest 10 is preferably equal to or larger than the outer diameter of the reverse thread 8; however, in consideration of the flow of material during thread rolling, It is also possible that the diameter of the thread 10 is slightly smaller than the outer diameter of the reverse thread 8.
＜発明の効果＞
かくして、本発明においては、軸部の逆ねじ部
分に形成された逆ねじ山と逆ねじ山に連続するつ
ば状の山が、互いに関連して石こうボード等の天
井、壁材から出るパンダー状の削り粉の不要排出
を防止する。その結果、パウダー状の削り粉の全
排出量を少なくすることができ、作業場内の粉塵
量を少なくすることができるようになつたもので
ある。又、これにより作業者の不快感を減少させ
ることができたものである。<Effects of the Invention> Thus, in the present invention, the reverse thread formed in the reverse thread portion of the shaft portion and the collar-shaped mountain continuous to the reverse thread are connected to each other and can be used for ceilings and wall materials such as gypsum boards. Prevents unnecessary discharge of panda-like shavings from the machine. As a result, the total amount of powdery shavings discharged can be reduced, and the amount of dust in the workplace can now be reduced. Moreover, this made it possible to reduce the discomfort of the operator.
第１図は本発明における第１実施例のタツピン
グねじの側面図、第２図は第１図のタツピングね
じの使用状態を説明する要部拡大図、第３図は第
２実施例の要部拡大図、第４図は第３実施例の要
部拡大図、第５図は第４実施例の要部拡大図、第
６図は従来例のねじの側面図、第７図は他の従来
例のねじの側面図、第８図はさらに他の従来例の
ねじの側面図である。
１……軸部、２……頭部、３，４……ねじ山、
５……推進ねじ部分、７……逆ねじ部分、８……
逆ねじ山、１０……つば状の山。
Fig. 1 is a side view of a tapping screw according to a first embodiment of the present invention, Fig. 2 is an enlarged view of the main part of the tapping screw shown in Fig. 1 to explain how it is used, and Fig. 3 is a main part of a second embodiment of the tapping screw. 4 is an enlarged view of the main part of the third embodiment, Fig. 5 is an enlarged view of the main part of the fourth embodiment, Fig. 6 is a side view of the conventional screw, and Fig. 7 is another conventional example. FIG. 8 is a side view of another conventional screw. 1...Shaft part, 2...Head, 3, 4...Screw thread,
5... Propulsion screw part, 7... Reverse thread part, 8...
Reverse screw thread, 10...a spit-shaped thread.
Claims (1)
なり、軸部の先端側には１条以上のねじ山３，４
が形成された推進ねじ部分５を有し、軸部の基端
側には推進ねじ部分５のねじ山３，４と逆方向に
進む１条以上の逆ねじ山８が形成された逆ねじ部
分７を有し、推進ねじ部分５と逆ねじ部分７との
間には無ねじ部分６を有し、この無ねじ部分６の
径が推進ねじ部分５の谷径より大きく設定され、
上記逆ねじ部分７の逆ねじ山８の外径が上記推進
ねじ部分５のねじ山３，４の外径とほぼ等しいか
或いはそれより大きく設定され、この逆ねじ山８
の基端９がほぼ一定のねじ山高さを保つた状態で
リード角０度のつば状の山１０に連続しており、
このつば状の山１０が軸部の周囲を一周している
と共に、つば状の山１０の外径が逆ねじ山８の外
径とほぼ等しいか或いはそれより大きく設定され
たことを特徴とするタツピングねじ。1 Consists of a shaft part 1 and a head part 2 provided at the base end thereof, and one or more threads 3, 4 on the distal end side of the shaft part.
A reverse threaded portion having one or more reverse threaded threads 8 running in a direction opposite to the threads 3 and 4 of the propelling threaded portion 5 on the proximal end side of the shaft portion. 7, a non-threaded portion 6 is provided between the propulsion threaded portion 5 and the reverse threaded portion 7, and the diameter of the non-threaded portion 6 is set larger than the root diameter of the propulsion threaded portion 5;
The outer diameter of the reverse thread 8 of the reverse thread portion 7 is set to be approximately equal to or larger than the outer diameter of the threads 3 and 4 of the propulsion thread portion 5, and this reverse thread 8
The base end 9 of is continuous with a collar-shaped ridge 10 with a lead angle of 0 degrees while maintaining a substantially constant thread height,
The flange-shaped crest 10 goes around the periphery of the shaft part, and the outer diameter of the flange-shaped ridge 10 is set to be approximately equal to or larger than the outer diameter of the reverse thread 8. Tapping screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60209573A JPS6272912A (en) | 1985-09-20 | 1985-09-20 | Tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60209573A JPS6272912A (en) | 1985-09-20 | 1985-09-20 | Tapping screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6272912A JPS6272912A (en) | 1987-04-03 |
| JPH036365B2 true JPH036365B2 (en) | 1991-01-29 |
Family
ID=16575069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60209573A Granted JPS6272912A (en) | 1985-09-20 | 1985-09-20 | Tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6272912A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3343048A1 (en) * | 2016-12-28 | 2018-07-04 | Saint-Gobain Placo | Screw |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52109070A (en) * | 1976-03-10 | 1977-09-12 | Sanyuu Kinzoku Kougiyou Kk | Screw |
| JPS6032046A (en) * | 1983-08-01 | 1985-02-19 | Konishiroku Photo Ind Co Ltd | Silver halide photosensitive material |
-
1985
- 1985-09-20 JP JP60209573A patent/JPS6272912A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52109070A (en) * | 1976-03-10 | 1977-09-12 | Sanyuu Kinzoku Kougiyou Kk | Screw |
| JPS6032046A (en) * | 1983-08-01 | 1985-02-19 | Konishiroku Photo Ind Co Ltd | Silver halide photosensitive material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6272912A (en) | 1987-04-03 |
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