JP2552017Y2 - Drill for two-step drilling - Google Patents
Drill for two-step drillingInfo
- Publication number
- JP2552017Y2 JP2552017Y2 JP5284292U JP5284292U JP2552017Y2 JP 2552017 Y2 JP2552017 Y2 JP 2552017Y2 JP 5284292 U JP5284292 U JP 5284292U JP 5284292 U JP5284292 U JP 5284292U JP 2552017 Y2 JP2552017 Y2 JP 2552017Y2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- cone
- cutting edge
- frame plate
- drill
- 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
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Drilling Tools (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、同軸異径の２段穴を
明けるドリルに関し、特に可撓性シートを貼付した枠板
に２段穴を明けるのに好適なドリルに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill for drilling a two-stage hole having a coaxial different diameter, and more particularly to a drill suitable for drilling a two-stage hole in a frame plate to which a flexible sheet is attached.
【０００２】[0002]
【従来の技術】近年、コンクリートのもつ無機質感を和
らげるためにコンクリート擁壁の表面に凹凸模様を設け
ることが広く行われている。このような凹凸模様は、図
５に示すように、合板製の枠板２０に発泡スチロール製
ないしウレタン製の化粧シート２１を貼付してなる化粧
枠板２２に２段穴３０を設け、化粧枠板２２と対向して
設けた枠板３１に透孔３２を設け、両者を枠板固定具３
３で連結し、形成された空所３４に生コンクリートを打
ち込むことによって形成される。枠板固定具３３として
は、軸芯に螺杆３５を有する裁頭円錐形のコーン３６と
螺杆の雌ネジ部３７に螺合するセパレータボルト３８と
からなるものが使用されている。2. Description of the Related Art In recent years, it has been widely practiced to provide an uneven pattern on the surface of a concrete retaining wall in order to reduce the inorganic texture of concrete. As shown in FIG. 5, a two-step hole 30 is provided in a decorative frame plate 22 formed by attaching a decorative sheet 21 made of styrene foam or urethane to a frame plate 20 made of plywood, as shown in FIG. A through hole 32 is provided in a frame plate 31 provided opposite to the frame plate 22, and both are provided with the frame plate fixture 3.
3 and is formed by driving ready-mixed concrete into the formed space 34. As the frame plate fixing member 33, a fixing member having a frusto-conical cone 36 having a threaded rod 35 at its axis and a separator bolt 38 screwed into a female threaded portion 37 of the threaded rod is used.
【０００３】枠板固定具のコーン３６を装着するために
化粧枠板２２に穿設する２段穴３０は、螺杆３５を挿通
する小径穴２３とこれと同軸でコーン３６を装着する大
径穴２４とからなり、小径穴２３を枠板２０に大径穴２
４を模様シート２１に設ける。小径穴２３に挿通した螺
杆の先端にナット３９を螺合してコーン３６を化粧枠板
２２に固定し、枠板３１の透孔３２にセパレータボルト
の一端を挿通し、他端をこのコーン３６の雌ネジ部３７
にセパレータボルト３８を螺着し、枠板３１から突出し
たセパレータボルトのネジ部３９にナット４０を螺着し
て化粧枠板２２と枠板３１とを固定する。A two-step hole 30 formed in the decorative frame plate 22 for mounting the cone 36 of the frame plate fixing device is composed of a small-diameter hole 23 through which a screw 35 is inserted and a large-diameter hole through which the cone 36 is mounted coaxially. 24, and the small-diameter hole 23 is
4 is provided on the pattern sheet 21. The cone 36 is fixed to the decorative frame plate 22 by screwing a nut 39 to the tip of the threaded rod inserted into the small diameter hole 23, one end of a separator bolt is inserted into the through hole 32 of the frame plate 31, and the other end is connected to the cone 36. Female screw part 37
The decorative frame plate 22 and the frame plate 31 are fixed by screwing a nut 40 to a screw portion 39 of the separator bolt protruding from the frame plate 31.
【０００４】[0004]
【考案が解決しようとする課題】このような２段穴を明
ける手段として、従来は図６に示すような木工用の２段
穴加工用のドリルを使用していた。このドリルは、柱等
にボルト挿通用の２段穴を明けるために考案されたもの
であり、先端のセンタ錐４との連接部に第１切れ刃５及
び第１切込刃６を有する小径錐２とこの小径錐２との連
接部に第２切れ刃１２及び第２切込刃１３を有する大径
錐３とを有し、小径錐２に延設したシャンク８を大径錐
３の中心孔１７に挿通してネジ１８で固定して使用する
ものである。このような従来ドリルを用いて化粧枠板２
２に２段穴を明けるには、図７に示すように、ドリルを
回転させながら模様シート２１に押し当てて削り取って
いくのであるが、往々にして枠板２０に大径穴を明けて
しまい、枠板の強度を低下させたり、枠板の再利用を妨
げたりするという問題があった。As a means for drilling such a two-step hole, a conventional two-step drill for woodworking as shown in FIG. 6 has been used. This drill is designed to drill a two-step hole for bolt insertion in a pillar or the like, and has a small diameter having a first cutting edge 5 and a first cutting edge 6 at a connection portion with a center cone 4 at the tip. A cone 2 and a large diameter cone 3 having a second cutting edge 12 and a second cutting edge 13 at a connection portion between the small diameter cone 2 and a shank 8 extending from the small diameter cone 2 It is inserted into the center hole 17 and fixed with screws 18 for use. Using such a conventional drill, the decorative frame 2
In order to make a two-step hole in 2, as shown in FIG. 7, the drill is rotated and pressed against the pattern sheet 21 to scrape it. However, a large-diameter hole is often made in the frame plate 20. However, there is a problem that the strength of the frame plate is reduced or reuse of the frame plate is hindered.
【０００５】本考案は、上記問題を解決することを課題
としており、枠板に大径穴をあけるおそれのない２段穴
加工用のドリルを提供することを目的としている。An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a drill for machining a two-step hole which does not have a possibility of making a large-diameter hole in a frame plate.
【０００６】[0006]
【課題を解決するための手段】本考案の２段穴加工用ド
リルは、先端のセンタ錐４との連接部に第１切れ刃５及
び第１切込刃６を有する小径錐２とこの小径錐２との連
接部に第２切れ刃１２及び第２切込刃１３を有する大径
錐３とを有している。大径錐の小径錐側端面１０に軸直
角方向の当たり面１１を形成すると共にこの当たり面１
１から若干後退した位置に第２切れ刃１２を形成したも
のである。小径錐２と大径錐３とは一体に形成してもよ
いが、両者を分割して直径の異なる小径穴２３を明ける
ことができるようにするのがよい。According to the present invention, there is provided a two-step drilling machine according to the present invention, wherein a small-diameter cone 2 having a first cutting edge 5 and a first cutting edge 6 at a connecting portion with a center cone 4 at the tip and the small-diameter cone. A large diameter cone 3 having a second cutting edge 12 and a second cutting edge 13 is provided at a connection portion with the cone 2. A contact surface 11 in the direction perpendicular to the axis is formed on the small-diameter cone-side end surface 10 of the large-diameter cone.
The second cutting edge 12 is formed at a position slightly retreated from 1. The small-diameter cone 2 and the large-diameter cone 3 may be formed integrally, but it is preferable that both are divided so that small-diameter holes 23 having different diameters can be formed.
【０００７】[0007]
【作用】化粧枠板２２の模様シート２１は、発泡スチロ
ールやウレタンゴム等の可撓性材料で作製されている。
２段穴を明けようとする位置の可撓性シート２１に回転
状態のドリルの大径錐３を押しつけると、図３に示すよ
うに、第２切込刃１３で大径錐３の外径と同径のリング
状の溝１４が形成される。更にドリル１を押しつける
と、大径錐の当たり面１１の前方に模様シート２１の盛
り上がり部２６が生じ、この盛り上がり部２６が当たり
面から若干後退した位置にある切れ刃１２によって削除
される。模様シート２１が削り終わると当たり面が枠板
２０に当接する。この状態で大径錐３を更に押しつけて
も、枠板２０は木製だから切れ刃１２の前方に盛り上が
り部が生じることがなく、切れ刃１２で削り取られるこ
とがないので、大径錐３の進行は停止し枠板２０に大径
穴を明けるおそれがない。The pattern sheet 21 of the decorative frame plate 22 is made of a flexible material such as styrene foam or urethane rubber.
When the large-diameter cone 3 of the rotating drill is pressed against the flexible sheet 21 at a position where a two-step hole is to be formed, the outer diameter of the large-diameter cone 3 is formed by the second cutting blade 13 as shown in FIG. A ring-shaped groove 14 having the same diameter as that of FIG. When the drill 1 is further pressed, a raised portion 26 of the pattern sheet 21 is formed in front of the contact surface 11 of the large-diameter cone, and the raised portion 26 is deleted by the cutting edge 12 at a position slightly retreated from the contact surface. When the pattern sheet 21 has been cut, the contact surface comes into contact with the frame plate 20. Even if the large diameter cone 3 is further pressed in this state, since the frame plate 20 is made of wood, no raised portion is formed in front of the cutting edge 12 and the large diameter cone 3 is not scraped off. Does not stop and there is no danger of drilling a large-diameter hole in the frame plate 20.
【０００８】[0008]
【実施例】図１及び図２は本考案の一実施例を示した図
である。本考案の２段穴加工用ドリル１は、小径錐２と
大径錐３とを有しており、両者は分割可能である。小径
錐２は、その先端にドリル１の穴明け位置を定めるセン
タ錐４を有しており、このセンタ錐４との連接部ににげ
角を備えた第１切れ刃５及び第１切込刃６が設けられて
いる。この第１切れ刃５には、削り取った切粉を後方へ
排出する第１ねじり溝７が連接されている。小径錐２の
基端側には段部を経てシャンク８が連接されており、シ
ャンク８には端面から軸方向に延びる割り溝９が設けら
れている。1 and 2 show an embodiment of the present invention. The drill 1 for drilling a two-step hole according to the present invention has a small-diameter cone 2 and a large-diameter cone 3, both of which can be divided. The small-diameter cone 2 has a center cone 4 at the tip thereof for defining a drilling position of the drill 1, and a first cutting edge 5 and a first notch provided with an angle at a connecting portion with the center cone 4. A blade 6 is provided. The first cutting edge 5 is connected to a first torsion groove 7 for discharging the shaved chips backward. A shank 8 is connected to the base end side of the small-diameter cone 2 via a step, and the shank 8 is provided with a split groove 9 extending from the end face in the axial direction.
【０００９】ドリル１の大径錐３は、その小径錐側端面
１０に軸直角方向の当たり面１１を有しており、この当
たり面１１から若干後退した位置に第２切れ刃１２が設
けられている。第２切れ刃１２の周り方向には大径錐３
の外周面と同一方向に延びる第２切込刃１３が設けられ
ており、この第２切込刃１３は、第２切れ刃１２に先立
って大径錐３の外径と同径のリング状の溝１４を形成し
て、第２切れ刃１２で削りとる部分を予め区画するもの
である。第２切れ刃１２には削り取った切粉を後ろへ排
出する第２ねじり溝１５が連接されている。The large-diameter cone 3 of the drill 1 has a contact surface 11 in the direction perpendicular to the axis on the small-diameter cone-side end surface 10, and a second cutting edge 12 is provided at a position slightly retreated from the contact surface 11. ing. In the direction around the second cutting edge 12, a large diameter cone 3
A second cutting blade 13 extending in the same direction as the outer peripheral surface of the large diameter cone 3 is provided in advance of the second cutting blade 12. The groove 14 is formed, and a portion to be cut by the second cutting edge 12 is partitioned in advance. The second cutting edge 12 is connected to a second torsion groove 15 for discharging the shaved chips backward.
【００１０】本考案のドリル１は、小径錐２のシャンク
８を大径錐３の中心孔１７に挿通して止めネジ１８で固
定し、シャンク８を図示しない電動ドリル本体に取りつ
ける。化粧枠板２２の２段穴を明けようとする位置に小
径錐のセンタ錐４を当ててドリル１を回転する。ドリル
１の小径錐２が模様シート２１を削り取りながら進出し
て化粧枠板２２の枠板２０に当接する。センタ錐４が枠
板２０に食い込んで小径錐２を案内し、第１切込刃６及
び第１切れ刃５で枠板２０が円形に削りとられて小径穴
２３が形成される。In the drill 1 of the present invention, the shank 8 of the small-diameter cone 2 is inserted into the center hole 17 of the large-diameter cone 3 and fixed with the set screw 18, and the shank 8 is attached to an electric drill body (not shown). The drill 1 is rotated by applying the center pyramid 4 of a small diameter pyramid to a position where a two-step hole of the decorative frame plate 22 is to be drilled. The small diameter cone 2 of the drill 1 advances while scraping the pattern sheet 21 and comes into contact with the frame plate 20 of the decorative frame plate 22. The center cone 4 cuts into the frame plate 20 to guide the small-diameter cone 2, and the frame plate 20 is cut into a circular shape by the first cutting blade 6 and the first cutting blade 5, so that a small-diameter hole 23 is formed.
【００１１】小径穴２３の穴明け動作中に大径錐３が発
泡スチロール製の模様シート２１に当接し、第２切込刃
１３が模様シート２１にリング状の溝１４を設けて第２
切れ刃で削り取る部分を区画する。この区画された部分
１６に大径錐の当たり面１１を押圧すると模様シート２
１が変形して第２切れ刃１２の前方に盛り上がり部２６
が形成され、この盛り上がり部を、第２切れ刃１２で削
り取って模様シート２１に大径穴２４を形成する。During the drilling operation of the small-diameter hole 23, the large-diameter cone 3 comes into contact with the styrofoam pattern sheet 21, and the second cutting blade 13 forms the ring-shaped groove 14 in the pattern sheet 21 to form a second groove.
Partition the part to be shaved with the cutting edge. When the contact surface 11 of the large-diameter pyramid is pressed against the section 16, the pattern sheet 2 is pressed.
1 is deformed and a raised portion 26 is provided in front of the second cutting edge 12.
The raised portion is scraped off with the second cutting edge 12 to form a large-diameter hole 24 in the pattern sheet 21.
【００１２】第２切れ刃１２による模様シート２１の削
り取り作業が終了すると大径錐の当たり面１１が枠板２
０に当接する。この状態でドリル１を枠板２０に押しつ
けても、枠板が木製であるから、溝１４で区画された部
分２７（図４参照）が第２切れ刃１２の前面に盛り上が
ることがなく、大径錐３が回転しても第２切れ刃１２で
削り取ることができないので、ドリル１の進行動作は停
止する。このように、本考案の２段穴加工用ドリル１で
化粧枠板２２に枠板固定具３３の２段穴３０を設けてや
れば、熟練を有しない者であっても簡単な操作で２段穴
を明けることができ、枠板２０に大径穴を明けるおそれ
がない。When the cutting operation of the pattern sheet 21 by the second cutting edge 12 is completed, the contact surface 11 of the large-diameter cone is
Contact 0. Even if the drill 1 is pressed against the frame plate 20 in this state, since the frame plate is made of wood, the portion 27 (see FIG. 4) defined by the groove 14 does not rise to the front surface of the second cutting edge 12 and is large. Even if the diameter cone 3 rotates, the drill 1 cannot be cut off by the second cutting edge 12, so that the advancing operation of the drill 1 stops. As described above, if the two-stage hole 30 of the frame plate fixing tool 33 is provided in the decorative frame plate 22 with the two-stage hole processing drill 1 of the present invention, even an unskilled person can easily operate the two-stage hole. The step hole can be made, and there is no possibility that a large diameter hole is made in the frame plate 20.
【００１３】[0013]
【考案の効果】以上のように、本考案のドリルによれ
ば、枠板に大径穴を明けるおそれがなく、だれでも簡単
に化粧枠板に枠板固定具を取りつけるための２段穴を明
けることができる。従って、大径穴を明けることによる
枠板の強度の低下が防止され、枠板の再利用を促進する
ことができる。[Effects of the Invention] As described above, according to the drill of the present invention, there is no danger of drilling a large-diameter hole in the frame plate, and anyone can easily install the two-step hole for attaching the frame plate fixing device to the decorative frame plate. I can open it. Therefore, a reduction in the strength of the frame plate due to drilling the large-diameter hole is prevented, and the reuse of the frame plate can be promoted.
【図１】本考案の２段穴加工用ドリルの正面図FIG. 1 is a front view of a drill for two-step drilling of the present invention.
【図２】本考案の２段穴加工用ドリルの分解図FIG. 2 is an exploded view of the two-step drill according to the present invention;
【図３】穴明け動作の説明図FIG. 3 is an explanatory diagram of a drilling operation.
【図４】穴明け動作終了時の断面図FIG. 4 is a cross-sectional view at the end of the drilling operation.
【図５】化粧枠板の固定構造を示す断面図FIG. 5 is a sectional view showing a fixing structure of the decorative frame plate.
【図６】従来の２段穴加工用ドリルの分解図FIG. 6 is an exploded view of a conventional two-step drill.
【図７】穴明け動作を示す説明図FIG. 7 is an explanatory diagram showing a drilling operation.
２ 小径錐 ３ 大径錐 ４ センタ錐 ５ 第１切れ刃 ６ 第１切込刃 10 小径錐側端面 11 当たり面 12 第２切れ刃 13 第２切込刃 2 Small diameter pyramid 3 Large diameter pyramid 4 Center pyramid 5 First cutting edge 6 First cutting edge 10 Small diameter conical side end face 11 Contact surface 12 Second cutting edge 13 Second cutting edge
Claims (1)
れ刃(5) 及び第１切込刃(6) を有する小径錐(2) とこの
小径錐(2) との連接部に第２切れ刃(12)及び第２切込刃
(13)を有する大径錐(3) とを有する２段穴加工用ドリル
において、大径錐の小径錐側端面(10)に軸直角方向の当
たり面(11)を形成すると共にこの当たり面(11)から若干
後退した位置に第２切れ刃(12)を設けたことを特徴とす
る、２段穴加工用ドリル。1. A small-diameter cone (2) having a first cutting edge (5) and a first cutting edge (6) at a connecting portion with a center cone (4) at the tip end, and connection of the small-diameter cone (2). Second cutting edge (12) and second cutting edge
A large-diameter drill (3) having a large-diameter pyramid (3) and a small-diameter pyramid-side end face (10) of the large-diameter pyramid having a contact surface (11) perpendicular to the axis, and A second-stage drill for drilling, wherein a second cutting edge (12) is provided at a position slightly retreated from (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5284292U JP2552017Y2 (en) | 1992-07-02 | 1992-07-02 | Drill for two-step drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5284292U JP2552017Y2 (en) | 1992-07-02 | 1992-07-02 | Drill for two-step drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH068605U JPH068605U (en) | 1994-02-04 |
| JP2552017Y2 true JP2552017Y2 (en) | 1997-10-27 |
Family
ID=12926103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5284292U Expired - Lifetime JP2552017Y2 (en) | 1992-07-02 | 1992-07-02 | Drill for two-step drilling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552017Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100538079B1 (en) * | 1997-05-13 | 2006-05-09 | 아께르 핀야즈 오이 | Wall structure |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4689360B2 (en) * | 2005-06-13 | 2011-05-25 | サンコーテクノ株式会社 | Drill holder |
| JP4601081B1 (en) * | 2009-08-14 | 2010-12-22 | 株式会社 豊建設 | Formwork spacing holder, corrugated formwork and concrete structure |
| JP6395414B2 (en) * | 2014-03-27 | 2018-09-26 | 平田機工株式会社 | Manufacturing method and processing apparatus |
| CN104625170A (en) * | 2014-12-31 | 2015-05-20 | 苏州欧美克合金工具有限公司 | Stepped drill bit |
-
1992
- 1992-07-02 JP JP5284292U patent/JP2552017Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100538079B1 (en) * | 1997-05-13 | 2006-05-09 | 아께르 핀야즈 오이 | Wall structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH068605U (en) | 1994-02-04 |
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