JPH07100244B2 - Core drill - Google Patents

Core drill

Info

Publication number
JPH07100244B2
JPH07100244B2 JP14774890A JP14774890A JPH07100244B2 JP H07100244 B2 JPH07100244 B2 JP H07100244B2 JP 14774890 A JP14774890 A JP 14774890A JP 14774890 A JP14774890 A JP 14774890A JP H07100244 B2 JPH07100244 B2 JP H07100244B2
Authority
JP
Japan
Prior art keywords
core body
hole
core
retaining member
top board
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
Application number
JP14774890A
Other languages
Japanese (ja)
Other versions
JPH0441114A (en
Inventor
昌明 宮永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miyanaga KK
Original Assignee
Miyanaga KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miyanaga KK filed Critical Miyanaga KK
Priority to JP14774890A priority Critical patent/JPH07100244B2/en
Publication of JPH0441114A publication Critical patent/JPH0441114A/en
Publication of JPH07100244B2 publication Critical patent/JPH07100244B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28DWORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、コンクリート材等に対して比較的大口径穴
を穿穴するのに用いるコアドリルに関する。
Description: TECHNICAL FIELD The present invention relates to a core drill used for making a relatively large hole in a concrete material or the like.

〔従来技術〕[Prior art]

従来より、大口径穴の穿穴用として多種多様のコアドリ
ルが開発され市販されており、これ等のコアドリルで
は、被穿穴体の材質に適合させた穿穴刃を備えている。
Conventionally, a wide variety of core drills have been developed and marketed for drilling large-diameter holes, and these core drills have a drilling blade adapted to the material of the object to be drilled.

ところで、固化したコンクリートを対象とするコアドリ
ルでは、円筒状をなすコア体の下端開口縁部に超硬合金
チップからなる穿穴刃が設けられ、この穿穴刃の側面は
コア体の内外両面に対して僅かに突出させた分厚い形態
を採っている。
By the way, in a core drill intended for solidified concrete, a drilling blade made of a cemented carbide tip is provided at the lower end opening edge of a cylindrical core body, and the side surfaces of this drilling blade are provided on both inner and outer surfaces of the core body. On the other hand, it has a thick shape with a slight protrusion.

このように、コア体の内外両面に突出状とする穿穴刃を
設けたコアドリルを用いてコンクリート材に対して貫通
穴を穿穴する場合、穿穴後にコア体内部には円柱状に刳
り貫かれた切削塊が残るが、この切削塊をコア体内から
抜き取る時に、コア体内面側に突出する穿穴刃部が邪魔
してコア体の下端開口側への抜き取りを困難にする。
As described above, when a through hole is drilled in a concrete material using a core drill provided with protruding drilling blades on both the inner and outer surfaces of the core body, after the hole is drilled, the core body is hollowed into a cylindrical shape. Although the cut lump remains, when the cut lump is pulled out from the core body, the punching blade portion protruding toward the inner surface of the core interferes with the cutting and makes it difficult to pull the core body toward the lower end opening side.

そこで、コア体内からの切削塊の抜き取りを容易にする
ために、シャンクと一体とする頂盤に対してコア体を別
体に構成し、穿穴後には両者を分離して切削塊をコア体
の上端開口側から抜き取るようにしたコアドリルが提案
されている。
Therefore, in order to facilitate the extraction of the cutting mass from the core body, the core body is configured separately from the top plate integrated with the shank, and after drilling, the two are separated to form the cutting mass. There is proposed a core drill which is designed to be pulled out from the upper end opening side of the.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

ところが、頂盤とコア体を別体とする従来のコアドリル
では、頂盤とコア体との結合にねじ構造等が採用されて
いるため、両者の結合・分離に手間が掛かって作業性が
悪く、また、繰り返しの使用でねじ構造部が損耗して両
者の結合関係に悪影響を与える等の問題がある。
However, in the conventional core drill that separates the top board and the core body, a screw structure or the like is used to connect the top board and the core body, so it takes time and effort to connect and separate the two and the workability is poor. In addition, there is a problem that the screw structure portion is worn out by repeated use, which adversely affects the connection between the two.

この発明は上記の点に鑑みなされたものであって、頂盤
とコア体との結合・分離がワンタッチ式に簡単にできて
取り扱いに便利であり、繰り返しの使用でも結合関係が
変わることなく安定性、作業性に優れたコアドリルを提
供することを目的とする。
The present invention has been made in view of the above points, and it is easy to connect and separate the top plate and the core body with a one-touch method, which is convenient for handling, and the connection relationship is stable even if it is repeatedly used. The purpose is to provide a core drill with excellent workability and workability.

〔課題を解決するための手段〕[Means for Solving the Problems]

上記の目的を達成するためのこの発明の要旨とするとこ
ろは、上面中央にシャンクを有する頂盤と、下端開口周
縁に穿穴刃を設けた円筒状のコア体からなり、上記頂盤
にコア体取付け部を形設し、該頂盤に、コア体取付け部
周面に開口させた複数個の保持孔を設け、該保持孔を、
その開口中心を通る頂盤半径方向線に対し平面的に回転
先行側に傾斜状にして開口を回転方向に背向させ、該保
持孔内に、ばねにより付勢した結合用ボールを収嵌保持
し、該結合用ボールの一部をコア体取付け部周面に出没
自在に突出させ、同じく頂盤に、コア体取付け部周面に
開口させた保持孔を設け、該保持孔を、その開口中心を
通る頂盤半径方向線に合致させ、該保持孔内に、ばねに
より付勢した抜止め用部材を収嵌保持し、該抜止め用部
材の先端に係止段と部分球面を形成し、抜止め用部材先
端をコア体取付け部周面に出没自在に突出させ、コア体
取付け部が嵌挿される上記コア体上端開口部に、上記結
合用ボールに対応して係合孔と、抜止め用部材先端に対
応して係止孔を穿設し、係合孔に対する結合用ボールの
係脱と、係止孔に対する抜止め用部材先端の係脱を同時
的に行うように構成したことを特徴とするコアドリルに
ある。
The gist of the present invention for achieving the above object is to include a top plate having a shank at the center of the upper surface and a cylindrical core body provided with a perforating blade at the lower end opening peripheral edge. A body mounting portion is formed, and a plurality of holding holes opened on the peripheral surface of the core body mounting portion are formed on the top plate, and the holding holes are
The opening is turned backward in the direction of rotation with respect to the radial line of the top plate that passes through the center of the opening, and the opening is turned backward in the direction of rotation, and the coupling ball urged by a spring is fitted and held in the holding hole. Then, a part of the connecting ball is projected on the peripheral surface of the core body mounting portion so as to be retractable, and a holding hole opened on the peripheral surface of the core body mounting portion is also provided on the top plate. A retaining step member urged by a spring is fitted and held in the retaining hole so as to match the radial line passing through the center, and a locking step and a partial spherical surface are formed at the tip of the retaining member. , The tip of the retaining member is projected on the peripheral surface of the core body attachment portion so as to be retractable, and the core body upper end opening into which the core body attachment portion is fitted is provided with an engagement hole corresponding to the coupling ball, and withdrawn. A locking hole is drilled corresponding to the tip of the locking member to engage and disengage the coupling ball from the locking hole, In core drill, characterized in that the engagement and disengagement of the retaining member distal end is configured as simultaneously performed for.

〔作用〕[Action]

頂盤のコア体取付け部をコア体の上端開口部に嵌挿する
と、結合用ボールと抜止め用部材先端の部分球面部にコ
ア体の上端開口縁が上向きに摺接して結合用ボールと抜
止め用部材を保持孔内に押し込み、結合用ボールが係合
孔に係合し、また、抜止め用部材先端の係止段が係止孔
に係止して頂盤とコア体が結合される。
When the core body attachment part of the top board is inserted into the upper end opening of the core body, the upper end opening edge of the core body slides upward on the part spherical surface of the tip of the retaining ball to prevent the upper end opening edge of the core body from slipping out. The locking member is pushed into the holding hole, the coupling ball engages with the engaging hole, and the locking step at the tip of the retaining member locks with the locking hole to couple the top plate and the core body. It

頂盤とコア体とを結合させた状態で、頂盤とコア体を軸
線方向に引き離す力を加えると、抜止め用部材先端の係
止段に係止孔の上側縁部が圧接して頂盤とコア体の分離
を阻止する。
When the top plate and the core body are connected to each other and a force is applied to separate the top plate and the core body in the axial direction, the upper edge of the locking hole presses against the locking step at the tip of the retaining member. Prevents separation of the board and core.

穿穴作業において、穿穴方向に回転させる時、結合用ボ
ールに係合孔の前側縁部が圧接して結合用ボールを回転
方向後向きに引き出す方向の力が作用し、頂盤とコア体
との結合関係を安定させて頂盤側からの回転トルクが結
合用ボールを介してコア体に伝達されて穿穴が行われ
る。
In the drilling operation, when rotating in the drilling direction, the front edge of the engaging hole is pressed against the coupling ball and a force is exerted in the direction of pulling out the coupling ball backward in the rotational direction. The rotational torque from the top side is transmitted to the core body through the coupling balls to stabilize the coupling relationship between the two, and the perforation is performed.

頂盤とコア体とを分離させるのに、頂盤とコア体とを穿
穴時とは逆方向に相対的に回動させると、結合ボールに
係合孔の後側縁部が摺接して結合用ボールを保持孔内に
引っ込め、また、抜止め用部材先端の係止段縁部が係止
孔端部に摺接して抜止め用部材を保持孔内に引っ込める
ので、頂盤とコア体を軸線方向に引き離して両者は分離
できる。
In order to separate the top plate and the core body, when the top plate and the core body are relatively rotated in the direction opposite to that at the time of drilling, the rear edge of the engagement hole slides on the coupling ball. The coupling ball is retracted into the holding hole, and the locking step edge of the tip of the retaining member slides into the end of the retaining hole to retract the retaining member into the retaining hole. Can be separated by pulling apart in the axial direction.

〔実施例〕〔Example〕

以下、この発明の実施例を図面を参照しながら具体的に
説明する。
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

第1図はこの発明のコアドリルの分解斜視図、第2図は
頂盤の一部を欠除した正面図、第3図は第2図A−A線
における断面図である。
FIG. 1 is an exploded perspective view of a core drill of the present invention, FIG. 2 is a front view in which a part of a top plate is cut away, and FIG. 3 is a sectional view taken along line AA in FIG.

図において、1は頂盤で、上面中央にシャンク2を有す
る。3は頂盤1に形設したコア体取付け部で、上部にス
トッパー用鍔4を有する。
In the figure, reference numeral 1 is a top plate having a shank 2 in the center of the upper surface. Reference numeral 3 denotes a core body mounting portion formed on the top board 1, and has a stopper collar 4 on the upper portion.

5はコア体取付け部周面に開口6させ、コア体取付け部
3の複数個所に等配的にして頂盤1に設けた保持孔で、
この保持孔5は、その開口6中心を通る頂盤半径方向線
に対し平面的に回転先行側に傾斜状にして開口6を回転
方向に背向させるようにしている。
Reference numeral 5 is a holding hole provided on the top board 1 by opening 6 on the peripheral surface of the core body mounting portion and equidistantly arranged at a plurality of locations of the core body mounting portion 3.
The holding hole 5 is formed so as to have a plane inclined with respect to the radial direction of the top plate passing through the center of the opening 6 toward the front side of the rotation so that the opening 6 is directed backward in the rotation direction.

7はこの保持孔5内に収嵌保持した結合用ボールで、こ
の結合用ボール7はばね8により外向きに付勢し、保持
孔5内で開口近傍に設けた抜止め体9によって開口部を
狭窄して結合用ボール7を保持孔5内に保持し、その一
部を開口6からコア体取付け部3周面に出没自在に突出
させている。
Reference numeral 7 denotes a connecting ball that is fitted and held in the holding hole 5, and the connecting ball 7 is biased outward by a spring 8 and is opened by a retaining member 9 provided near the opening in the holding hole 5. Is narrowed to hold the coupling ball 7 in the holding hole 5, and a part thereof is projected from the opening 6 to the peripheral surface of the core body mounting portion 3 so as to be retractable.

10は同じくコア体取付け部3において2つの保持孔5の
中間位置で、コア体取付け部周面に開口11させて頂盤1
に設けた保持孔で、この保持孔10は、その開口中心を通
る頂盤半径方向線に合致させている。
Similarly, 10 is an intermediate position between the two holding holes 5 in the core body mounting portion 3, and an opening 11 is made on the peripheral surface of the core body mounting portion to make the top board 1
In the holding hole provided in the above, the holding hole 10 is aligned with the radial line of the top board passing through the center of the opening.

12はこの保持孔10内に収嵌保持した抜止め用部材で、こ
の抜止め用部材12先端に球状面上半部を切削してフラッ
ト面の係止段13と、係止段13下部を部分球面14に形成し
ており、この抜止め用部材12をばね15により外向きに付
勢して抜止め用部材12先端を開口11からコア体取付け部
3周面に突出させている。
Reference numeral 12 denotes a retaining member fitted and held in the holding hole 10, and the upper half of the spherical surface is cut at the tip of the retaining member 12 to form a flat locking step 13 and a locking step 13 lower part. A partial spherical surface 14 is formed, and the retaining member 12 is biased outward by a spring 15 so that the tip of the retaining member 12 projects from the opening 11 to the peripheral surface of the core body mounting portion 3.

尚、図中16は保持孔10内において抜止め用部材12の回動
を阻止し、且つ、抜止め用部材12の移動量を規制するガ
イド機構で、抜止め用部材12に設けた長孔に、頂盤1側
に支持されてばねにより付勢したガイドボール17を係合
させている。
Reference numeral 16 in the drawing denotes a guide mechanism that prevents the retaining member 12 from rotating in the holding hole 10 and restricts the movement amount of the retaining member 12, and is a long hole provided in the retaining member 12. A guide ball 17 supported on the top board 1 side and biased by a spring is engaged therewith.

18は下端開口周縁部に穿穴刃19を設けた円筒状のコア体
で、穿穴刃19は超硬合金チップからなり、この穿穴刃19
の側面はコア体内外両面に対して僅かに突出状にしてお
り、コンクリート等への穿穴に適合させた構成のもので
ある。
Reference numeral 18 denotes a cylindrical core body provided with a piercing blade 19 at the peripheral edge of the lower end opening, and the piercing blade 19 is made of a cemented carbide chip.
The side surfaces of the core are slightly projecting from both the inside and outside of the core, and are configured to be suitable for making holes in concrete or the like.

20は結合用ボール7に対応してコア体18の上端開口部に
穿設した係合孔で、コア体取付け部3周面から突出する
結合用ボール7が係脱するもので、開口6から突出する
結合用ボール7の大きさに適合させた丸孔とされる。
Reference numeral 20 denotes an engaging hole formed in the upper end opening of the core body 18 corresponding to the coupling ball 7, and the coupling ball 7 protruding from the peripheral surface of the core body mounting portion 3 is engaged and disengaged from the opening 6. It is a round hole adapted to the size of the projecting coupling ball 7.

21は同じく抜止め用部材12の係止段13に対応してコア体
18の上端開口部に穿設した係止孔で、抜止め用部材12先
端が係脱するもので、上側縁部が係止段13に当接するよ
うにしている。
21 is also a core body corresponding to the locking step 13 of the retaining member 12
A locking hole is formed in the upper end opening of the locking member 18 so that the tip of the retaining member 12 is engaged and disengaged, and the upper edge of the locking member 12 contacts the locking step 13.

尚、上記する係合孔5に対する結合用ボール7の係脱
と、係止孔21に対する抜止め用部材12先端の係脱は同時
的に行うように構成されている。また、上記構成におい
て結合用ボール7を収嵌保持する保持孔5の開口6を回
転方向に背向させる上で、開口6中心を通る頂盤半径方
向線に対し平面的に回転先行側に傾斜する保持孔5の角
度設定に当たっては、第4図に示すように、結合用ボー
ル7面とコア体18の係合孔20縁との接点aと結合用ボー
ル7中心を結ぶ線l1が、接点aと、この接点aに対向す
る結合用ボール7面と保持孔5壁との接点bとを結ぶ線
l2の外側にくるようにしている。つまり、接点aと結合
用ボール7中心を結ぶ線l1上に保結合用ボール7面と保
持孔5壁との接点b′がある時の仮想保持孔(破線図
示)と図中に示す水平線hとのなす角度αと、接点aと
接点bを結ぶ線l2が上記線l1の内側にある時の保持孔5
と図中に示す水平線hとのなす角度βとの関係をα>β
に採ったことによって、頂盤1側から結合用ボール7を
介してコア体18に対してトルク伝達時に結合用ボール7
を回転方向後向きに引き出そうとする分力fを生じさせ
るようにしている。
The engagement and disengagement of the coupling ball 7 with respect to the engagement hole 5 and the engagement and disengagement of the tip of the retaining member 12 with respect to the locking hole 21 are performed at the same time. In addition, in the above configuration, when the opening 6 of the holding hole 5 for fitting and holding the coupling ball 7 is made to face back in the rotation direction, the plane 6 is inclined to the rotation leading side with respect to the radial line passing through the center of the opening 6. In setting the angle of the holding hole 5, the line l 1 connecting the contact point a between the surface of the coupling ball 7 and the edge of the engaging hole 20 of the core body 18 and the center of the coupling ball 7 is set as shown in FIG. A line connecting the contact point a and the contact point b between the surface of the coupling ball 7 and the wall of the holding hole 5 facing the contact point a.
It is located outside of l 2 . That is, a virtual holding hole (shown by a broken line) and a horizontal line shown in the drawing when the contact b'between the surface of the retaining ball 7 and the wall of the retaining hole 5 is located on the line l 1 connecting the contact point a and the center of the retaining ball 7. The holding hole 5 when the angle α formed by h and the line l 2 connecting the contact point a and the contact point b are inside the line l 1
And the angle β between the horizontal line h shown in the figure and α> β
By adopting the above, the coupling balls 7 are transmitted from the top board 1 side through the coupling balls 7 to the core body 18 during torque transmission.
Is generated in the rotational direction rearward.

この発明のコアドリルの使用において、頂盤1とコア体
18とを結合するには、コア体取付け部3をコア体18の上
端開口部に嵌入すると、コア体18の上端開口縁がコア体
取付け部3周面に突出する結合用ボール7と、抜止め用
部材12先端の部分球面14に摺接し、結合用ボール7及び
抜止め用部材12をそれぞれに保持孔5,10内に引っ込め、
コア体18の上端開口縁がストッパー用鍔4に当てられた
ところで、結合用ボール7が結合孔20に突出係合し、ま
た、抜止め用部材12先端が係止孔21に突出係止し、頂盤
1とコア体18とが結合される。
In using the core drill of the present invention, the top board 1 and the core body
To connect with the core body 18, the core body mounting portion 3 is fitted into the upper end opening portion of the core body 18, and the upper end opening edge of the core body 18 and the coupling ball 7 protruding to the peripheral surface of the core body mounting portion 3 are removed. Sliding contact with the partial spherical surface 14 at the tip of the stopper member 12 and retracting the coupling ball 7 and the retaining member 12 into the holding holes 5 and 10, respectively.
When the upper end opening edge of the core body 18 is brought into contact with the stopper flange 4, the coupling ball 7 is projectingly engaged with the coupling hole 20, and the tip of the retaining member 12 is projectingly engaged with the locking hole 21. , The top board 1 and the core body 18 are joined together.

頂盤1とコア体18とを結合した状態で、頂盤1とコア体
18を軸線方向に引き離す力を加える時は、抜止め用部材
12の係止段13に係止孔21の上側縁部が当接係止して頂盤
1とコア体18との分離は阻止される。
With the top board 1 and the core body 18 connected, the top board 1 and the core body
When applying a force that pulls 18 apart in the axial direction, a retaining member
The upper edge of the locking hole 21 abuts and locks with the locking step 13 of 12 to prevent separation of the top board 1 and the core body 18.

頂盤1とコア体18を結合してコンクリート材等に対する
穿穴作業を行う時は、結合用ボール7を収嵌保持する保
持孔5の開口6は回転方向に背向させているから、結合
用ボール7には係合孔20の前側縁部が圧接されて結合用
ボール7を回転方向後向き(横向き)に引き出す方向の
力が作用して結合用ボール7は動かず、頂盤1とコア体
18との結合関係を安定させて穿穴が行われる。
When the top board 1 and the core body 18 are connected to each other to perform a hole drilling work on a concrete material or the like, the opening 6 of the holding hole 5 for fitting and holding the connecting ball 7 is made to face backward in the rotation direction. The front edge of the engaging hole 20 is pressed against the work ball 7, and a force is exerted in the direction of pulling out the connection ball 7 backward (laterally) in the rotational direction, so that the connection ball 7 does not move, and the top board 1 and the core are not moved. body
Drilling is performed while stabilizing the coupling relationship with 18.

穿穴作業が終了して、コア体18内部に残る切削塊を抜き
取る時は、頂盤1に対してコア体18を上記穿穴回転方向
と逆方向に相対的に回動させると、コア体18の係合孔20
の後側縁部が結合用ボール7面に摺接して結合用ボール
7を保持孔5内へ引っ込め、また、コア体18の係止孔21
端部に抜止め用部材12先端の係止段13縁部に横から摺接
して抜止め用部材12を保持孔10内に引っ込めるので、こ
の状態で頂盤1とコア体18とを引き離して分離すること
ができる。
When the drilling work is completed and the cutting mass remaining inside the core body 18 is to be extracted, the core body 18 is rotated relative to the top plate 1 in the direction opposite to the above-described rotation direction of the drilling hole. 18 engaging holes 20
The rear side edge portion of the rear side slides on the surface of the coupling ball 7 to retract the coupling ball 7 into the holding hole 5, and the locking hole 21 of the core body 18
Since the retaining member 12 is retracted into the holding hole 10 by laterally slidingly contacting the edge of the locking step 13 at the tip of the retaining member 12 to the end portion, the top plate 1 and the core body 18 are pulled apart in this state. Can be separated.

こうして、開放されたコア体18の上端開口部からコア体
18内に残留する切削塊は難無く抜き取られる。
In this way, the core body is opened from the upper end opening of the core body 18.
The cutting mass remaining in 18 can be extracted without difficulty.

〔発明の効果〕〔The invention's effect〕

上記の如く構成したこの発明のコアドリルは、次のよう
な効果を奏する。
The core drill of the present invention configured as described above has the following effects.

(1) 頂盤とコア体との結合・分離は、頂盤のコア体
取付け部をコア体の上端開口部に嵌挿して若干相対的に
回動させるだけでワンタッチ的に出来るから、作業性を
格段に向上する。
(1) Workability is achieved by connecting and disconnecting the top board and the core body by simply inserting the core body mounting part of the top board into the upper end opening of the core body and rotating the core body slightly relative to each other. To improve significantly.

(2) コア体の上端開口部には、複数個の孔(係合孔
と係止孔)が穿設してあるだけであるから、穿穴作業後
にコア体内部に残る切削塊をコア体の上端開口部から抜
き取る時に、コア体内には邪魔する突起物がなく、切削
塊の取り出しが簡単にできる。また、繰り返しの使用で
も損耗等は起こらず、耐用寿命の延長が図られる。
(2) Since the upper end opening of the core body is only provided with a plurality of holes (engaging holes and locking holes), the cutting mass remaining inside the core body after the drilling work is removed from the core body. When pulling out from the upper end opening of the, there is no protruding object in the core body, and the cut mass can be taken out easily. In addition, wear and the like do not occur even after repeated use, and the service life is extended.

(3) 頂盤とコア体との結合部を規格化しておけば、
一つの頂盤に対して穿穴刃の種類を違えた複数種のコア
体が共用できるから、被穿穴体の種類を違えての穿穴
や、穿穴刃が損耗した時のコア体の交換等に便利であ
り、経済的で汎用性が高い。
(3) If the joint between the top board and the core body is standardized,
Since multiple types of core bodies with different types of punching blades can be shared for one top plate, it is possible to use the core body with different types of drilled objects and core bodies when the drilling blade is worn out. Convenient for replacement, economical and versatile.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの発明のコアドリルの分解斜視図、第2図は
頂盤の一部を欠除した正面図、第3図は第2図A−A線
における断面図、第4図は保持孔の傾斜角設定説明図で
ある。 1……頂盤、2……シャンク、3……コア体取付け部、
4……ストッパー用鍔、5……保持孔、6……開口、7
……結合用ボール、8……ばね、9……抜止め用体、10
……保持孔、11……開口、12……抜止め用部材、13……
係止段、14……部分球面、15……ばね、16……ガイド機
構、17……ガイドボール、18……コア体、19……穿穴
刃、20……係合孔、21……係止孔。
FIG. 1 is an exploded perspective view of a core drill of the present invention, FIG. 2 is a front view in which a part of a top plate is cut away, FIG. 3 is a sectional view taken along line AA in FIG. 2, and FIG. 4 is a holding hole. FIG. 6 is an explanatory view of setting an inclination angle of FIG. 1 ... top board, 2 ... shank, 3 ... core body mounting part,
4 …… Stopper collar, 5 …… Holding hole, 6 …… Opening, 7
...... Coupling balls, 8 ...... Springs, 9 ...... Retaining body, 10
…… Holding hole, 11 …… Opening, 12 …… Retaining member, 13 ……
Locking step, 14 ... Partial spherical surface, 15 ... Spring, 16 ... Guide mechanism, 17 ... Guide ball, 18 ... Core body, 19 ... Drilling blade, 20 ... Engaging hole, 21 ... Locking hole.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】上面中央にシャンクを有する頂盤と、下端
開口周縁に穿穴刃を設けた円筒状のコア体からなり、上
記頂盤にコア体取付け部を形設し、該頂盤に、コア体取
付け部周面に開口させた複数個の保持孔を設け、該保持
孔を、その開口中心を通る頂盤半径方向線に対し平面的
に回転先行側に傾斜状にして開口を回転方向に背向さ
せ、該保持孔内に、ばねにより付勢した結合用ボールを
収嵌保持し、該結合用ボールの一部をコア体取付け部周
面に出没自在に突出させ、同じく頂盤に、コア体取付け
部周面に開口させた保持孔を設け、該保持孔を、その開
口中心を通る頂盤半径方向線に合致させ、該保持孔内
に、ばねにより付勢した抜止め用部材を収嵌保持し、該
抜止め用部材の先端に係止段と部分球面を形成し、抜止
め用部材先端をコア体取付け部周面に出没自在に突出さ
せ、コア体取付け部が嵌挿される上記コア体上端開口部
に、上記結合用ボールに対応して係合孔と、抜止め用部
材先端に対応して係止孔を穿設し、係合孔に対する結合
用ボールの係脱と、係止孔に対する抜止め用部材先端の
係脱を同時的に行うように構成したことを特徴とするコ
アドリル。
1. A top board having a shank at the center of the upper surface and a cylindrical core body provided with a perforation blade at the peripheral edge of the lower end opening, and a core body mounting portion is formed on the top board. , A plurality of holding holes opened on the peripheral surface of the core mounting portion, and the holding holes are rotated with respect to the radial line of the top board passing through the center of the opening in a plane inclining toward the leading side. The connecting balls that are biased by springs are housed in the holding holes, and a part of the connecting balls is projected on the peripheral surface of the core body so as to be retractable. Is provided with a holding hole opened in the peripheral surface of the core body mounting portion, and the holding hole is aligned with the radial line of the top board passing through the center of the opening, and is retained in the holding hole by a spring for retaining. The member is fitted and held, and a locking step and a partial spherical surface are formed at the tip of the retaining member, and the leading end of the retaining member is a core body. The core body upper end opening, into which the core body mounting portion is fitted and inserted so as to project in and out from the peripheral surface of the attachment portion, engages with the engagement hole corresponding to the coupling ball and the tip of the retaining member. A core drill, characterized in that a stop hole is formed so that engagement and disengagement of a coupling ball with an engagement hole and engagement and disengagement of a tip of a retaining member with a locking hole are performed simultaneously.
JP14774890A 1990-06-05 1990-06-05 Core drill Expired - Lifetime JPH07100244B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14774890A JPH07100244B2 (en) 1990-06-05 1990-06-05 Core drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14774890A JPH07100244B2 (en) 1990-06-05 1990-06-05 Core drill

Publications (2)

Publication Number Publication Date
JPH0441114A JPH0441114A (en) 1992-02-12
JPH07100244B2 true JPH07100244B2 (en) 1995-11-01

Family

ID=15437254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14774890A Expired - Lifetime JPH07100244B2 (en) 1990-06-05 1990-06-05 Core drill

Country Status (1)

Country Link
JP (1) JPH07100244B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744665B1 (en) * 1996-02-13 1998-04-03 Lattanzi Pietro CORE SYSTEM FOR PERFORMING DRILLING OR CARROT IN CONCRETE OR CONCRETE WALLS
US20170252834A1 (en) * 2015-06-09 2017-09-07 Thomas J. Spera Hole-saw
NL2018062B1 (en) * 2016-12-23 2018-07-02 Toproc A G Quick change tool
CN109397552A (en) * 2018-12-26 2019-03-01 湖北攀峰钻石科技有限公司 A kind of quartz saw blade that sharpness is high

Also Published As

Publication number Publication date
JPH0441114A (en) 1992-02-12

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