JP2546806Y2 - Drill bit - Google Patents
Drill bitInfo
- Publication number
- JP2546806Y2 JP2546806Y2 JP1991037989U JP3798991U JP2546806Y2 JP 2546806 Y2 JP2546806 Y2 JP 2546806Y2 JP 1991037989 U JP1991037989 U JP 1991037989U JP 3798991 U JP3798991 U JP 3798991U JP 2546806 Y2 JP2546806 Y2 JP 2546806Y2
- Authority
- JP
- Japan
- Prior art keywords
- notch
- bit
- guide rod
- drill bit
- hole
- 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
- Earth Drilling (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、コンクリ−ト製の枕木
の修理に使用するに適した穿孔ビットに関するものであ
る。BACKGROUND OF THE INVENTION The present invention relates to a drill bit suitable for use in repairing concrete sleepers.
【０００２】[0002]
【従来の技術】図４はコンクリ−ト製の枕木を表すもの
で、同図に示すように、コンクリ−ト製の枕木２０に穿
孔した比較的径の大きな下穴２１に挿通したボルト２２
で押え金具２３を介してレ−ル２５を締め付け固定して
いる。下穴２１の底部は座金２６によって閉塞され、該
下穴２１の内壁とボルトとの隙間には、エポキシ系の樹
脂３０が充填される。このレ−ル２５を交換する場合
は、ボルト２２を緩めて取り外した後、下穴２１内の樹
脂を除去しなければならないが、適当な工具がないた
め、この樹脂の除去作業は容易ではなく、作業能率が悪
かった。2. Description of the Related Art FIG. 4 shows a concrete sleeper. As shown in FIG. 4, a bolt 22 inserted through a relatively large pilot hole 21 formed in a concrete sleeper 20 is shown.
The rail 25 is fastened and fixed via the holding metal 23. The bottom of the pilot hole 21 is closed by a washer 26, and a gap between the inner wall of the pilot hole 21 and the bolt is filled with an epoxy resin 30. When replacing the rail 25, the resin in the pilot hole 21 must be removed after the bolt 22 is loosened and removed. However, since there is no appropriate tool, the work of removing the resin is not easy. , Work efficiency was poor.
【０００３】[0003]
【考案が解決しようとする課題】本考案は、上記コンク
リ−ト製の枕木の下穴に充填され固化している樹脂を容
易に除去することのできる工具を提供することを課題と
している。SUMMARY OF THE INVENTION It is an object of the present invention to provide a tool which can easily remove the solidified resin filled in the lower hole of the concrete sleeper.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、本考案は次のような構成を採用した。すなわち、本
考案にかかる穿孔ビットは、鋼製台金の頭部前面部に植
設した複数の硬質金属製刃体の中央部に、前方へ突出す
るガイド棒を設け、前記複数の刃体の間隔部に前後方向
の繰粉溝を形成するとともに、該繰粉溝の後部の台金外
周部には前後方向の切欠き部を設け、かつ、前記溝と切
欠き部との間に湾曲状切込部を周方向に沿って設けたこ
とを特徴とする。In order to solve the above problems, the present invention employs the following configuration. That is, the drill bit according to the present invention is provided with a guide rod protruding forward in the center of a plurality of hard metal blades implanted in the front part of the head of the steel base metal. A longitudinal groove is formed in the space , and a longitudinal notch is provided in the outer periphery of the base metal at the rear of the groove.
A curved notch is provided along the circumferential direction between the notch and the notch .
【０００５】[0005]
【作用】ガイド棒を前記ボルトを抜いた後の穴に嵌合さ
せ、ビットに打撃と回転を与えつつ押圧すると、ガイド
棒を案内としてビットが直進し、固化した樹脂層を破壊
する。破壊された樹脂の粉は、繰粉溝と台金後部の切欠
き部を通って外部に排出される。When the guide rod is fitted into the hole from which the bolt has been removed and the bit is pressed while being hit and rotated, the bit moves straight with the guide rod as a guide, and the solidified resin layer is broken. The broken resin powder is discharged to the outside through the powder groove and the notch at the rear of the base.
【０００６】[0006]
【実施例】以下、図面に表された実施例について説明す
る。この穿孔ビット１は、鋼製台金２の頭部３に形成し
た４個のカッテイングウイング５，…の前面部に超硬合
金製刃体７がそれぞれ蝋接され、これら刃体の中央部に
丸棒状のガイド棒９が前方に向かって突設されている。
本例では、ガイド棒が台金の中央部に形成した凹部１０
に蝋接されているが、台金と一体に成形してもよい。互
いに隣接する刃体７，７の間には、前後方向の繰粉溝１
２が形成されている。この繰粉溝１２は、台金２の頭部
３と胴部１３の境界部に形成された湾曲形状の切込部１
５に達している。各繰粉溝１２には、エア吐出口１７が
開口している。台金２の芯部には、胴部後端部に開口す
る嵌合孔１９が設けられており、その上端部付近から前
記エア吐出口１７に通ずる分岐孔１８が穿設されてい
る。嵌合孔１９は、テ−パロッドに嵌合するテ−パ穴と
して形成されているが、ねじロッドを用いる時はねじ穴
として形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. The drill bit 1 has four cutting wings 5,... Formed on the head 3 of the steel base 2, and a cemented carbide blade 7 is brazed to the front surface of each of the cutting wings 5,. A round rod-shaped guide rod 9 is provided to protrude forward.
In this example, the guide rod is formed in the concave portion 10 formed in the center of the base metal.
, But may be formed integrally with the base. A milling groove 1 in the front-rear direction is provided between the blades 7 adjacent to each other.
2 are formed. This milling groove 12 has a curved cut 1 formed at the boundary between the head 3 of the base metal 2 and the body 13.
5 has been reached. An air discharge port 17 is open in each of the powder grooves 12. The core of the base metal 2 is provided with a fitting hole 19 which is open at the rear end of the trunk, and a branch hole 18 is formed from near the upper end to the air discharge port 17. The fitting hole 19 is formed as a tapered hole that fits into a tapered rod, but is formed as a screw hole when a screw rod is used.
【０００７】台金２の胴部１３は、直径Ｄの円筒の外周
面を前後方向に切り欠いて平面状とした形になってい
る。ビットの外径Ｇと上記胴部の直径Ｄとの差は、２乃
至３ミリメ−トル、ＤとＴとの差は４乃至６ミリメ−ト
ルとするのが好ましい。ＤとＧとが近いほど胴部１３も
ガイドとして機能するので、ビットの直進性が良くな
る。なお、ＤとＴの差は、繰粉すなわち破壊された樹脂
の粉がうまく排出されるようなものであれば良い。[0007] The body 13 of the base metal 2 is formed in a flat shape by cutting the outer peripheral surface of a cylinder having a diameter D in the front-rear direction. The difference between the outer diameter G of the bit and the diameter D of the body is preferably 2 to 3 mm, and the difference between D and T is preferably 4 to 6 mm. As D and G are closer, the body 13 also functions as a guide, so that the straightness of the bit is improved. Note that the difference between D and T may be any as long as the dust, that is, the broken resin powder, is discharged well.
【０００８】次に、このビットの使用法について説明す
ると、このビット１は、ボルト２２を抜いてレ−ル２５
を取りはずした枕木２０のボルト穴２７にガイド棒９を
挿入し、さく孔ロッド３２を介して削岩機の回転と打撃
とを伝えつつ、ビットの頭部３を樹脂層に押し付ける。
ビットの頭部の径Ｇは枕木の下穴２１の内径とほぼ等し
いので、ビット１が下穴２１に沿って下降し、樹脂層を
破壊して繰粉溝を通して外部に排出する。このようにし
て、容易に残留樹脂層を除去することができるのであ
る。Next, the use of this bit will be described.
The guide rod 9 is inserted into the bolt hole 27 of the sleeper 20 from which the bolt has been removed, and the bit head 3 is pressed against the resin layer while transmitting the rotation and impact of the rock drill through the drill rod 32.
Since the diameter G of the head of the bit is substantially equal to the inside diameter of the pilot hole 21 of the sleeper, the bit 1 descends along the pilot hole 21 to break the resin layer and discharge the resin layer through the groove. Thus, the residual resin layer can be easily removed.
【０００９】[0009]
【考案の効果】この考案にかかる穿孔ビットは、鋼製台
金の頭部前面部に植設した複数の硬質金属製刃体の中央
部に、前方へ突出するガイド棒を設け、前記複数の刃体
の間隔部に前後方向の繰粉溝を形成するとともに、該繰
粉溝の後部の台金外周部には前後方向の切欠き部を設
け、かつ、前記繰粉溝と切欠き部との間に湾曲状切込部
を周方向に沿って設けたので、これら繰粉溝、切欠き
部、湾曲状切込部を通って繰粉がうまく後方へ排出され
るようになり、再生用の枕木のボルト穴を案内として、
その周囲の残留樹脂層を容易に除去することが可能とな
った。The drill bit according to the present invention is provided with a guide rod projecting forward at the center of a plurality of hard metal blades implanted in the front part of the head of a steel base. Along with forming a front-back direction milling groove in the interval portion of the blade body, a front-back direction notch is provided at the outer periphery of the base metal at the rear of the milling groove, and the milling groove and the notch are provided . Curved notch between
Are provided along the circumferential direction.
, The flour is discharged to the rear through the curved notch
As a guide, using the bolt hole of the sleeper for regeneration as a guide,
It has become possible to easily remove the residual resin layer around the periphery.
【００１０】[0010]
【図１】本考案の実施例の側面図である。FIG. 1 is a side view of an embodiment of the present invention.
【図２】本考案の実施例の正面図である。FIG. 2 is a front view of the embodiment of the present invention.
【図３】本考案の実施例の胴部の断面図である。FIG. 3 is a cross-sectional view of the body of the embodiment of the present invention.
【図４】コンクリ−ト枕木の断面図である。FIG. 4 is a sectional view of a concrete sleeper.
【図５】本考案のビットの使用法の説明図である。FIG. 5 is a diagram illustrating the use of bits according to the present invention;
１ 穿孔ビット ２ 台金 ３ 頭部 ７ 刃体 ９ ガイド棒 １２ 繰粉溝 １３ 胴部 ２０ 枕木 Reference Signs List 1 drilling bit 2 base metal 3 head 7 blade body 9 guide rod 12 milling groove 13 trunk 20 sleeper
Claims (1)
硬質金属製刃体の中央部に、前方へ突出するガイド棒を
設け、前記複数の刃体の間隔部に前後方向の繰粉溝を形
成するとともに、台金の後部外周部には前後方向の切欠
き部を設け、かつ、前記繰粉溝と切欠き部との間に湾曲
状切込部を周方向に沿って設けたことを特徴とする穿孔
ビット。1. A plurality of hard metal blades implanted in front of a head portion of a steel base are provided with a guide rod projecting forward at a central portion thereof, and a front-rear direction is provided at an interval between the plurality of blades. to form a Kukona groove of the rear outer peripheral portion of the base metal provided with notch in the front-rear direction, and curved between said Repetitive Konamizo a notch
A perforated bit characterized in that a notch is provided along a circumferential direction .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991037989U JP2546806Y2 (en) | 1991-04-23 | 1991-04-23 | Drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991037989U JP2546806Y2 (en) | 1991-04-23 | 1991-04-23 | Drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0530290U JPH0530290U (en) | 1993-04-20 |
| JP2546806Y2 true JP2546806Y2 (en) | 1997-09-03 |
Family
ID=12512980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991037989U Expired - Lifetime JP2546806Y2 (en) | 1991-04-23 | 1991-04-23 | Drill bit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2546806Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496802U (en) * | 1972-04-18 | 1974-01-21 |
-
1991
- 1991-04-23 JP JP1991037989U patent/JP2546806Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530290U (en) | 1993-04-20 |
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