JP7470993B2 - Drill - Google Patents
Drill Download PDFInfo
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- JP7470993B2 JP7470993B2 JP2021075466A JP2021075466A JP7470993B2 JP 7470993 B2 JP7470993 B2 JP 7470993B2 JP 2021075466 A JP2021075466 A JP 2021075466A JP 2021075466 A JP2021075466 A JP 2021075466A JP 7470993 B2 JP7470993 B2 JP 7470993B2
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- drill
- collar
- tip
- rear end
- cone
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- 238000005553 drilling Methods 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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- Drilling And Boring (AREA)
Description
本発明は、各種加工用のドリルに関する。 The present invention relates to drills for various machining applications.
本願発明者および出願人は、例えば、下記特許文献１示すように、大腿骨に穿孔するための特殊ドリルなどを各種考案している。例えば、特許文献１のドリルでは、大腿骨軸に対してドリル軸が３０°程度の角度を成すような強斜位で穿孔しなければならない場合でも、先端に設けられた先端切れ刃と、先端切れ刃の後方に連なるメイン切れ刃とを備え、先端切れ刃９の先端角は所定の鋭角であり、メイン切れ刃の先端角は、メイン切れ刃の前端から後端にかけて減少させると共に、メイン切れ刃の前端の先端角は、先端切れ刃の先端角よりも大きい鋭角を有することで、ドリルの切れ刃によって骨の表面が蹴られることなく、正しい穿孔位置にドリルを位置決めして穿孔を開始することができる。 The inventors and applicants of the present application have devised various special drills for drilling holes in the femur, as shown in, for example, Patent Document 1 below. For example, the drill in Patent Document 1 has a tip cutting edge at the tip and a main cutting edge connected to the rear of the tip cutting edge, and the tip angle of the tip cutting edge 9 is a predetermined acute angle, and the tip angle of the main cutting edge decreases from the front end to the rear end of the main cutting edge, and the tip angle of the front end of the main cutting edge is larger than the tip angle of the tip cutting edge, so that the surface of the bone is not kicked by the cutting edge of the drill, and the drill can be positioned at the correct drilling position and drilling can be started.
ここで、本願発明者および出願人は、かかる各種ドリルの開発を一歩進めて、金属製の治具やプレートや固定具に形成された貫通孔にドリルを挿通させてその先の加工対象物を切削したい場合に対応したドリルの開発を試みた。 Here, the inventors and applicants of the present application have taken the development of such drills one step further and attempted to develop a drill that can be inserted into a through hole formed in a metal jig, plate, or fixture to cut the workpiece beyond it.
かかるドリルの開発では、金属製の治具等に形成された貫通孔の軸線方向とドリルの軸線方向とが微妙にずれることで、ドリルの刃先が貫通孔の一部または全部と干渉してしまうという課題の解決が必要であった。 In developing such a drill, it was necessary to solve the problem that the cutting edge of the drill would interfere with part or all of the through hole due to a slight misalignment between the axial direction of the drill and the axial direction of the through hole formed in a metal jig or the like.
以上の事情に鑑みて、本発明は、ドリルを挿入する加工対象物手前の治具等の貫通孔との干渉を回避することができるドリルを提供すること目的とする。 In view of the above, the present invention aims to provide a drill that can avoid interference with through holes in a jig or other tool in front of the workpiece into which the drill is inserted.
第１発明のドリルは、
先端部に形成された錐部と、
前記錐部に外挿される円筒形状のカラーとを備え、
前記カラーの後端側の外径が前記錐部後端側の直径と同一で、該カラーと該錐部後端側とは外径が連続している。
The drill of the first invention is
A cone portion formed at the tip portion;
a cylindrical collar that is fitted onto the cone portion ;
The outer diameter of the rear end side of the collar is the same as the diameter of the rear end side of the cone portion, and the outer diameters of the collar and the rear end side of the cone portion are continuous .
第１発明のドリルによれば、ドリル先端の錐部にカラーを付けることで、錐部を覆い、ドリルを挿入する加工対象物手前の治具等の貫通孔との干渉をカラーで逃げて回避することができる。また、カラーの後端の外径が、錐部後端側の直径と同一で、カラーと錐部後端側の外径が連続しているため、ドリルを挿入する加工対象物手前の治具等の貫通孔とドリルとの干渉を回避することができる。 According to the drill of the first invention, by attaching a collar to the drill tip, the drill tip is covered and the collar can be used to avoid interference with a through hole of a jig or the like in front of the workpiece into which the drill is inserted. In addition, since the outer diameter of the rear end of the collar is the same as the diameter of the rear end of the drill tip, and the outer diameters of the collar and the rear end of the drill tip are continuous, interference between the drill and a through hole of a jig or the like in front of the workpiece into which the drill is inserted can be avoided.
第２発明のドリルは、第１発明において、
前記錐部が平錐である
ことを特徴とする。
The drill of the second invention is the drill of the first invention,
The cone portion is a flat cone.
第２発明のドリルによれば、錐部と外挿したカラーとの間に大きな空間を設けることができ、切屑の排出性を良好に保つことができる。 The drill of the second invention allows a large space to be provided between the drill bit and the collar, ensuring good chip removal.
第３発明のドリルは、第１又は第２発明のドリルにおいて、
前記カラーの先端がテーパ状に形成されることを特徴とする。
A drill according to a third aspect of the present invention is the drill according to the first or second aspect of the present invention,
The tip of the collar is formed in a tapered shape.
第３発明のドリルによれば、カラーの先端をテーパ状とすることで、カラーの先端を薄く鋭くすることで加工対象物に対する切削性を向上させることができる。 According to the drill of the third invention, the tip of the collar is tapered, making the tip of the collar thin and sharp, thereby improving the cutting ability for the workpiece.
第４発明のドリルは、第１又は第２発明のドリルにおいて、
前記カラーの先端部がノコギリ状に形成されていることを特徴とする。
A drill according to a fourth aspect of the present invention is the drill according to the first or second aspect of the present invention,
The tip of the collar is formed in a sawtooth shape.
第４発明のドリルによれば、カラーの先端をノコギリ状とすることで、カラー先端に切削性を付与することができ、加工対象物に対する切削性を向上させることができる。 According to the drill of the fourth invention, by forming the tip of the collar into a sawtooth shape, cutting ability can be imparted to the tip of the collar, and cutting ability for the workpiece can be improved.
本実施形態のドリルは、図１に示すように、ドリル１と、カラー２とを備える。 As shown in FIG. 1, the drill of this embodiment includes a drill 1 and a collar 2.
ドリル１は、図２に示すように、先端は平錐形状の平錐部を有するドリルであり、平錐形状より後方は、ネジレ角 15°の溝（ドリル溝）が形成されたドリル部となっている。 As shown in Figure 2, drill 1 is a drill with a flat cone-shaped tip, and the area behind the flat cone shape is a drill section with a groove (drill groove) with a helix angle of 15°.
平錐部は、図３に示すカラー２で覆われる。カラー２の先端は鋭角な角度で成形されている。 The cone portion is covered with a collar 2 as shown in Figure 3. The tip of the collar 2 is shaped at an acute angle.
本実施形態のドリルは、先端より5mmの範囲で切り刃部がカラー（平錐部に外挿される円筒形状のカラー）で覆われており、一般的なドリルの切屑の排出部としての溝を持たないので、特殊ドリルが斜め方向から治具の穴（貫通孔）に挿入されてもドリルはロックされる事はない。 The cutting edge of the drill in this embodiment is covered with a collar (a cylindrical collar that is extrapolated onto the cone section) within a range of 5 mm from the tip, and does not have a groove for discharging chips like a typical drill, so the special drill will not get locked even if it is inserted into the hole (through hole) of the jig from an oblique direction.
本実施形態のドリルは、カラー２が治具の穴径より-0.05～-0.1mm程度小さく製作されており、斜めから挿入された特殊ドリルは治具の穴（貫通孔）に倣い、想定された正しい位置に矯正されていくので、速やかに正しい位置に穿孔ができる。 The drill of this embodiment is manufactured with a collar 2 that is approximately -0.05 to -0.1 mm smaller than the diameter of the jig hole, and the special drill inserted at an angle follows the jig hole (through hole) and is corrected to the expected correct position, allowing drilling to be performed quickly in the correct position.
また、カラーの後端側の外径はドリル部の直径と同一となっており、カラーとドリル部とは外径が連続するようになっている。 In addition, the outer diameter of the rear end of the collar is the same as the diameter of the drill section, so the outer diameters of the collar and drill section are continuous.
そして、切屑の排出は平錐形状の刃先とカラーの隙間より排出され、カラーを通過した後は、溝部より排出される。 The chips are discharged through the gap between the cone-shaped cutting edge and the collar, and after passing through the collar, they are discharged through the groove.
このように、本実施形態のドリルは、ドリルを挿入する加工対象物手前の治具等の貫通孔との干渉を回避することができる。 In this way, the drill of this embodiment can avoid interference with through holes in a jig or other tool in front of the workpiece into which the drill is inserted.
また、本実施形態では、カラー２に先端側に縮径したテーパを設けたが、テーパは省略しても、カラー２により、ドリル部に対して縮径した平錐部がドリルを挿入する加工対象物手前の治具等の貫通孔との干渉を回避することができる。 In addition, in this embodiment, the collar 2 is provided with a tapered tip end, but even if the taper is omitted, the collar 2 can prevent the flat cone portion, which is tapered relative to the drill portion, from interfering with the through hole of a jig or the like in front of the workpiece into which the drill is inserted.
また、テーパを設ける場合には、カラー２の軸方向に全体的に形成してもよい、先端側のみに部分的に形成してもよい。さらに、カラーの先端をノコギリ状として、カラー先端に切削性を付与してもよい。 When a taper is provided, it may be formed over the entire axial direction of the collar 2, or it may be formed partially only on the tip side. Furthermore, the tip of the collar may be shaped like a saw, giving the tip of the collar cutting properties.
また、本実施形態における平錘部の形状はこれに限定されるものではなく、錘形の錘部であればよい。 In addition, the shape of the flat weight portion in this embodiment is not limited to this, and any weight portion having a weight shape may be used.
また、本実施形態において、カラーの後端側の外径が前記錐部後端の直径と同一としたが、これに限定されるものではなく該直径より若干大きくてもよい。 In addition, in this embodiment, the outer diameter of the rear end of the collar is the same as the diameter of the rear end of the cone portion, but this is not limited to this and may be slightly larger than that diameter.
また、本実施形態では、ドリル１とカラー２とを別体として構成したが、これに限定されるものではなく、ドリル１とカラー２とを一体として構成してもよい。 In addition, in this embodiment, the drill 1 and the collar 2 are configured as separate bodies, but this is not limited thereto, and the drill 1 and the collar 2 may be configured as one body.
１…ドリル、２…カラー。
1...Drill, 2...Color.
Claims (4)
前記錐部に外挿される円筒形状のカラーとを備え、
前記カラーの後端側の外径が前記錐部後端側の直径と同一で、該カラーと該錐部後端側とは外径が連続していることを特徴とするドリル。 A cone portion formed at the tip portion;
a cylindrical collar that is fitted onto the cone portion;
A drill , characterized in that the outer diameter of the rear end side of the collar is the same as the diameter of the rear end side of the drill portion, and the outer diameters of the collar and the rear end side of the drill portion are continuous .
前記錐部が平錐であること
を特徴とするドリル。 The drill according to claim 1,
A drill, wherein the cone portion is a flat cone.
前記カラーの先端がテーパ状に形成されることを特徴とするドリル。 The drill according to claim 1 or 2 ,
A drill characterized in that the tip of the collar is formed in a tapered shape.
前記カラーの先端がノコギリ状に形成されていることを特徴とするドリル。 The drill according to claim 1 or 2 ,
A drill characterized in that the tip of the collar is formed in a sawtooth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021075466A JP7470993B2 (en) | 2021-04-28 | 2021-04-28 | Drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021075466A JP7470993B2 (en) | 2021-04-28 | 2021-04-28 | Drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2022169832A JP2022169832A (en) | 2022-11-10 |
| JP7470993B2 true JP7470993B2 (en) | 2024-04-19 |
Family
ID=83944434
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021075466A Active JP7470993B2 (en) | 2021-04-28 | 2021-04-28 | Drill |
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| Country | Link |
|---|---|
| JP (1) | JP7470993B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000513985A (en) | 1997-04-25 | 2000-10-24 | ズルツァー オルソペディー アクチェンゲゼルシャフト | Device for generating endochondral or osteochondral holes |
| JP2005329477A (en) | 2004-05-18 | 2005-12-02 | Daihatsu Motor Co Ltd | Bush-less deep hole machining method and stepped pilot hole forming stepped drill |
| JP2012010758A (en) | 2010-06-29 | 2012-01-19 | Japan Medical Materials Corp | Boring drill and drill system |
| JP2014083662A (en) | 2012-10-26 | 2014-05-12 | Jfe Steel Corp | Drilling device and drilling method |
-
2021
- 2021-04-28 JP JP2021075466A patent/JP7470993B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000513985A (en) | 1997-04-25 | 2000-10-24 | ズルツァー オルソペディー アクチェンゲゼルシャフト | Device for generating endochondral or osteochondral holes |
| JP2005329477A (en) | 2004-05-18 | 2005-12-02 | Daihatsu Motor Co Ltd | Bush-less deep hole machining method and stepped pilot hole forming stepped drill |
| JP2012010758A (en) | 2010-06-29 | 2012-01-19 | Japan Medical Materials Corp | Boring drill and drill system |
| JP2014083662A (en) | 2012-10-26 | 2014-05-12 | Jfe Steel Corp | Drilling device and drilling method |
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| Publication number | Publication date |
|---|---|
| JP2022169832A (en) | 2022-11-10 |
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