JP4680560B2

JP4680560B2 - Tool connection structure

Info

Publication number: JP4680560B2
Application number: JP2004292064A
Authority: JP
Inventors: 國雄安心院
Original assignee: 株式会社ハウスビーエム
Priority date: 2003-10-29
Filing date: 2004-10-05
Publication date: 2011-05-11
Anticipated expiration: 2024-10-05
Also published as: JP2005153136A

Description

本発明は、駆動源を備えた工具本体の先端側に、円筒型刃物及びセンタードリルを取り付けた工具の連結構造に関するものである。 The present invention relates to a tool connecting structure in which a cylindrical blade and a center drill are attached to the tip side of a tool body provided with a drive source.

従来、駆動源を備えた工具本体の先端に、円筒型刃物とセンタードリルとを取り付けるための工具連結構造としては、例えば特許文献１記載のものが存在する。 Conventionally, as a tool connection structure for attaching a cylindrical blade and a center drill to the tip of a tool body provided with a drive source, for example, the one described in Patent Document 1 exists.

この工具連結構造は、図１０、図１１に示すとおり、円筒型刃物１１１０と、センタードリル１１２０と、円筒型刃物１１１０及びセンタードリル１１２０を取り付ける工具装着部材１１３０を具備している。なお、図１０は前記工具連結構造の縦断面図であり、図１１は前記工具連結構造のうち円筒型刃物１１１０と工具装着部材１１３０との関係を示す一部正面図である。 As shown in FIGS. 10 and 11, the tool connection structure includes a cylindrical cutter 1110, a center drill 1120, and a tool mounting member 1130 for attaching the cylindrical cutter 1110 and the center drill 1120. FIG. 10 is a longitudinal sectional view of the tool connection structure, and FIG. 11 is a partial front view showing the relationship between the cylindrical blade 1110 and the tool mounting member 1130 in the tool connection structure.

工具装着部材１１３０は、工具本体に接続されるシャンク部１１３１と、円筒型刃物１１１０が外嵌するとともにセンタードリル１１２０が内周に取り付けられる取付部１１３２とを有し、取付部１１３２には、その外周に突起１１３３と回り止めピン１１６０とが備えられている。 The tool mounting member 1130 includes a shank portion 1131 connected to the tool body, and a mounting portion 1132 to which the cylindrical cutter 1110 is fitted and the center drill 1120 is attached to the inner periphery. A protrusion 1133 and a detent pin 1160 are provided on the outer periphery.

また、円筒型刃物１１１０は、一端に切断刃１１１１を備えるとともに他端に取付筒部１１１２を備えており、取付筒部１１１２には切欠１１１３が形成されている。そして、この取付筒部１１１２が取付部１１３２に外嵌し、回り止めピン１１６０が切欠１１１３に嵌り込むことにより、円筒型刃物１１１０が工具装着部材１１３０に対して相対回転が阻止された状態で取り付けられている。 The cylindrical cutter 1110 includes a cutting blade 1111 at one end and an attachment tube portion 1112 at the other end, and a notch 1113 is formed in the attachment tube portion 1112. Then, the mounting cylinder portion 1112 is externally fitted to the mounting portion 1132, and the non-rotating pin 1160 is fitted to the notch 1113, so that the cylindrical cutter 1110 is attached in a state in which relative rotation with respect to the tool mounting member 1130 is prevented. It has been.

さらに、工具装着部材１１３０の外周面には突起１１３３が形成され、この突起１１３３をシャンク部１１３１側から覆う状態で、袋ナット１１４０が取付筒部１１１２の外周面に形成された雄ねじ１１１４に螺合されることにより、円筒型刃物１１１０が工具装着部材１１３０に対して固定されている。 Further, a protrusion 1133 is formed on the outer peripheral surface of the tool mounting member 1130, and the cap nut 1140 is screwed into a male screw 1114 formed on the outer peripheral surface of the mounting cylinder portion 1112 in a state where the protrusion 1133 is covered from the shank portion 1131 side. As a result, the cylindrical blade 1110 is fixed to the tool mounting member 1130.

センタードリル１１２０は、一端側にドリル刃１１２１を備えるとともに、他端側に凹部１１２３を備えた基端部１１２２を備え、この基端部１１２２が取付部１１３２の内周部分に挿入されている。そして、取付部１１３２に形成された雌ねじ孔１１３４にボルト１１５０が螺合され、このボルト１１５０の先端が凹部１１２３に圧接することにより、センタードリル１１２０が工具装着部材１１３０に対して固定されている。
特開平６−３１２３０９号公報（図２、図３） The center drill 1120 includes a drill blade 1121 on one end side and a base end portion 1122 having a recess 1123 on the other end side. The base end portion 1122 is inserted into the inner peripheral portion of the attachment portion 1132. A bolt 1150 is screwed into a female screw hole 1134 formed in the mounting portion 1132, and the center drill 1120 is fixed to the tool mounting member 1130 by pressing the tip of the bolt 1150 against the recess 1123.
JP-A-6-312309 (FIGS. 2 and 3)

前述のような構成を採ると、円筒型刃物１１１０と工具装着部材１１３０との着脱を阻止する袋ナット１１４０と、センタードリル１１２０と工具装着部材１１３０とを固定するボルト１１５０とを軸方向に並べて配置しなければならず、その分構造全体の軸長が増大する。また、円筒型刃物１１１０及びセンタードリル１１２０を工具装着部材１１３０に対して着脱する時には、袋ナット１１４０とボルト１１５０とをそれぞれ個別に操作しなければならず、作業性でも改善が求められる。 When the configuration as described above is adopted, a cap nut 1140 that prevents the cylindrical cutter 1110 and the tool mounting member 1130 from being attached and detached, and a bolt 1150 that fixes the center drill 1120 and the tool mounting member 1130 are arranged side by side in the axial direction. This increases the axial length of the entire structure. Further, when the cylindrical cutter 1110 and the center drill 1120 are attached to and detached from the tool mounting member 1130, the cap nut 1140 and the bolt 1150 must be individually operated, and improvement in workability is also required.

そこで本発明は、これらの課題を解決できる工具連結構造を提供することを目的とする
。 Then, an object of this invention is to provide the tool connection structure which can solve these subjects.

本発明は、駆動源を備えた工具本体の先端側に、この工具本体に取り付けるためのシャンク部を有する工具装着部材を介してドリル刃を有するセンタードリル及び円筒型刃物を取り付ける工具連結構造であって、前記円筒型刃物は、その先端部分に切断刃が形成されるとともに、基端部分の内周部分に前記工具装着部材を係脱可能に外嵌するための取付筒部が形成され、前記工具装着部材は、前記円筒型刃物並びに前記センタードリルを取り付ける取付部と前記シャンク部とを有する本体部と、この本体部に設けられ、当該本体部に取り付けられたセンタードリルを着脱不能に拘束する拘束状態と、当該センタードリルを着脱可能とする着脱許容状態とに切替可能なドリル拘束手段と、前記本体部に相対移動可能に取り付けられ、その移動により、前記円筒型刃物が前記本体部から抜け出すことを阻止するとともに前記ドリル拘束手段を拘束状態にする固定位置と、前記円筒型刃物が前記本体部に対し着脱可能とするとともに前記ドリル拘束手段を着脱許容状態にする解除位置とに切替可能な固定部材とを具備したことを基本構成とする。 The present invention is a tool connection structure in which a center drill having a drill blade and a cylindrical cutter are attached to a distal end side of a tool body provided with a drive source via a tool mounting member having a shank portion to be attached to the tool body. The cylindrical blade has a cutting blade formed at the distal end portion thereof, and an attachment tube portion for detachably fitting the tool mounting member to the inner peripheral portion of the proximal end portion. The tool mounting member is provided on the main body having a mounting portion for attaching the cylindrical blade and the center drill and the shank, and restrains the center drill attached to the main body so as not to be detachable. Drill restraining means that can be switched between a restraining state and an attachable / detachable state in which the center drill is attachable and detachable. A fixing position for preventing the cylindrical cutter from coming out of the main body and making the drill restraining means in a restrained state, and making the cylindrical cutter detachable from the main body and making the drill restraining means A basic configuration includes a fixing member that can be switched to a release position in which the attachment / detachment is allowed.

さらに、請求項１記載の発明では、前記基本構成に加え、前記固定部材は、前記解除位置と前記固定位置との間に、前記ドリル拘束手段を拘束状態にするが前記円筒型刃物は前記本体部に対し着脱可能とする中間位置を有する。 Furthermore, in the first aspect of the present invention, in addition to the basic configuration, the fixing member between the fixing position and the release position, the drill is a restraint for the constrained state the cylindrical blade is the It has an intermediate position that can be attached to and detached from the main body .

また、請求項２記載の発明では、前記基本構成に加え、前記円筒型刃物と前記本体部とを軸方向に嵌合した状態で特定の角度位置まで相対回転させることにより前記円筒型刃物が前記本体部から抜け出すことが阻止されるように構成されるとともに、前記固定部材は前記固定位置において前記特定の角度位置で前記円筒型刃物と前記本体部との相対回転を阻止し、前記本体部の前記取付部の外周部分及び前記円筒型刃物の取付筒部の内周部のうち、いずれか一方に、工具先端側から軸方向に延設された縦溝部と当該縦溝部から周方向に延設された横溝部とを備えた係合溝が形成され、かつ、他方に前記係合溝に対して係脱可能に取付可能な突起部が形成され、前記係合溝と前記突起部とが嵌合することにより前記円筒型刃物と前記本体部とが軸方向に嵌合可能とし、前記縦溝部と前記横溝部とが交わる位置に前記突起部が位置するときに前記円筒型刃物と前記本体部とを相対回転させ、前記突起部が前記横溝部に位置する角度位置において、前記円筒型刃物が前記本体部から抜け出すことが阻止されるように構成される。 Further, in the invention of claim 2, wherein, in addition to the basic configuration, the cylindrical blade by relative rotation to a specific angular position and said cylindrical blade and the body portion in a state fitted in the axial direction together get out of the main body portion is configured to be blocked, the fixing member prevents the relative rotation between said cylindrical tool and the body portion at a specific angular position in said fixed position, said main body portion A longitudinal groove extending in the axial direction from the tool tip side and extending from the longitudinal groove in the circumferential direction on one of the outer peripheral portion of the mounting portion and the inner peripheral portion of the mounting cylindrical portion of the cylindrical cutter. An engagement groove having a lateral groove portion provided is formed, and a projection portion detachably attachable to the engagement groove is formed on the other side, and the engagement groove and the projection portion are By fitting, the cylindrical blade and the main body are The cylindrical cutter and the main body are rotated relative to each other when the protrusion is positioned at a position where the vertical groove and the horizontal groove intersect, and the protrusion is positioned in the horizontal groove. The cylindrical blade is configured to be prevented from coming out of the main body at the angular position .

また、請求項３記載の発明では、前記基本構成に加え、前記固定部材の先端には、この固定部材の先端側に突出した形状に回転阻止部が形成されるとともに、前記円筒型刃物及び前記工具装着部材には、前記回転阻止部と係合するための係合部が形成され、前記固定部材が前記固定位置に位置するときは、前記回転阻止部材が前記係合部と係合することにより前記円筒型刃物と前記工具装着部材との相対回転を阻止するとともに、前記固定部材が前記解除位置に位置するときは、前記回転阻止部材が前記係合部に係合せず、前記円筒型刃物と前記工具装着部材との相対回転を可能にする。 Further, in the invention of claim 3, wherein, in addition to the basic configuration, the a tip of the fixing member, the rotation preventing portion is formed in a shape protruding to the distal end side of the fixing member, the cylindrical blade and The tool mounting member is formed with an engaging portion for engaging with the rotation preventing portion, and when the fixing member is located at the fixing position, the rotation preventing member is engaged with the engaging portion. This prevents relative rotation between the cylindrical blade and the tool mounting member, and when the fixing member is located at the release position, the rotation prevention member does not engage with the engaging portion, and the cylindrical shape Relative rotation between the blade and the tool mounting member is enabled .

また、請求項４記載の発明では、前記基本構成に加え、前記センタードリルは、前記ドリル刃と、凹部が形成された基端部とを具備し、前記本体部の取付部には、その内周部分に、前記センタードリルの基端部を取り付けるセンタードリル挿入孔が形成されるとともに、このセンタードリル挿入孔とこの取付部の外周部分とを貫通する貫通孔が形成され、前記ドリル拘束手段は、前記貫通孔の内部に保持される係止部材を有し、この係止部材は、前記センタードリル挿入孔の内周から突出して前記センタードリルの基端部に形成された凹部に嵌り込むことにより、前記センタードリルの基端部が前記センタードリル挿入孔から抜け出すことを阻止する係止位置と、この係止位置から外周側に退避して前記センタードリルの基端部が前記センタードリル挿入孔に対し係脱可能とする退避位置との間で前記貫通孔内を移動するものであり、前記固定部材が前記固定位置に位置するときには、前記係止部材が前記係止位置に保持されるとともに、前記固定部材が前記解除位置に位置するときには前記係止部材が前記退避位置に移動可能とする。 Further, in the invention of claim 4, wherein, in addition to the basic configuration, the center drill, and the drill bit, comprising a recess proximal portion formed, the mounting portion of the main body portion, the A center drill insertion hole for attaching a base end portion of the center drill is formed in an inner peripheral portion, and a through hole penetrating the center drill insertion hole and the outer peripheral portion of the attachment portion is formed. Has a locking member held inside the through hole, and this locking member protrudes from the inner periphery of the center drill insertion hole and fits into a recess formed at the base end of the center drill. Accordingly, the base end portion of the center drill is prevented from coming out of the center drill insertion hole, and the base end portion of the center drill is retracted from the locking position to the outer peripheral side. It moves in the through hole between a retraction position where it can be engaged with and disengaged from the drill insertion hole, and when the fixing member is located at the fixing position, the locking member is held at the locking position. In addition, when the fixing member is positioned at the release position, the locking member is movable to the retracted position .

請求項５記載の発明は、請求項１〜４のいずれかに記載の工具連結構造において、前記固定部材は、前記本体部に対して移動可能な状態で外嵌することにより、前記解除位置と前記固定位置との間を移動可能とする。 According to a fifth aspect of the present invention, in the tool connection structure according to any one of the first to fourth aspects, the fixing member is externally fitted in a movable state with respect to the main body portion, whereby the release position and It is possible to move between the fixed positions .

前記の基本構成を採れば、前記固定部材のみで、前記円筒型刃物が前記本体部から抜け出すことを阻止するとともに前記ドリルが前記本体部から抜け出すことを阻止することが可能となるため、前記円筒型刃物及び前記ドリルを前記本体部に固定する際に、複数の部品を用いる必要がなく、構造全体の軸長を短くすることが可能となる。 If the basic configuration is adopted, it is possible to prevent the cylindrical blade from coming out of the main body portion and the drill from coming out of the main body portion with only the fixing member. When the die cutter and the drill are fixed to the main body, it is not necessary to use a plurality of parts, and the axial length of the entire structure can be shortened.

さらに、前記固定部材は、前記円筒型刃物が前記本体部から抜け出すことを阻止するとともに前記ドリル拘束手段を拘束状態にする固定位置と、前記円筒型刃物が前記本体部に対し着脱可能とするとともに前記ドリル拘束手段を着脱許容状態にする解除位置とに切替可能とする状態で、前記本体部に取り付けられているため、前記固定部材を前記固定位置と前記解除位置とに切り替えるのみで、前記円筒型刃物及びセンタードリルを工具装着部材に対して着脱可能な状態にすることが可能となる。したがって、作業性を改善することが可能となる。 Further, the fixing member prevents the cylindrical cutter from coming out of the main body part, and makes the drill restricting means in a restricted state, and allows the cylindrical cutter to be attached to and detached from the main body part. Since the drill restraining means is attached to the main body in a state where the drill restraining means can be switched to a release position that allows attachment / detachment, the cylinder can be simply switched between the fixing position and the release position. It becomes possible to make the die cutter and the center drill detachable from the tool mounting member. Therefore, workability can be improved.

さらに、請求項１記載の発明の構成を採れば、前記ドリル拘束手段を拘束状態にするが前記円筒型刃物は前記本体部に対し着脱可能とする中間位置を有しているため、前記円筒型刃物のみを取り外すときの作業性を向上させることが可能となる。 Furthermore, if the structure of invention of Claim 1 is taken, since the said drill restraint means will be in a restrained state, since the said cylindrical cutter has an intermediate position which can be attached or detached with respect to the said main-body part, the said cylindrical type It becomes possible to improve workability | operativity when removing only a cutter.

請求項２記載の発明の構成を採れば、前記円筒型刃物と前記本体部とを軸方向に嵌合した状態で特定の角度位置まで相対回転させることにより前記円筒型刃物が前記本体部から抜け出すことが阻止されるように構成されているため、前記円筒型刃物を前記本体部から取り外す際には、一度、前記円筒型刃物と前記本体部との位置関係を前記特定の角度位置以外の位置にした後に、前記円筒型刃物と前記本体部との嵌合状態を解除する必要がある。したがって、前記円筒型刃物が前記本体部から抜け出すことをより有効に阻止することが可能となる。さらに、前記本体部の前記取付部の外周部分及び前記円筒型刃物の取付筒部の内周部のうち、いずれか一方に、工具先端側から軸方向に延設された縦溝部と当該縦溝部から周方向に延設された横溝部とを備えた係合溝を形成し、かつ、他方に前記係合溝に対して係脱可能に取付可能な突起部を形成することにより、簡素な構成で、前記の効果を実現することが可能となる。 If the structure of invention of Claim 2 is taken, the said cylindrical cutter will come out from the said main-body part by carrying out relative rotation to the specific angular position in the state which fitted the said cylindrical-shaped cutter and the said main-body part to the axial direction. Therefore, when removing the cylindrical blade from the main body, the positional relationship between the cylindrical blade and the main body is set to a position other than the specific angular position. Then, it is necessary to release the fitted state between the cylindrical blade and the main body. Therefore, it is possible to more effectively prevent the cylindrical blade from coming out of the main body. Furthermore, either the outer peripheral portion of the mounting portion of the main body portion or the inner peripheral portion of the mounting cylindrical portion of the cylindrical cutter, the vertical groove portion extending in the axial direction from the tool tip side and the vertical groove portion the engagement groove and a lateral groove portion extending in the circumferential direction to form a, and, by forming the engaging detachably attachable protrusion with respect to the engaging grooves on the other, a simple structure Thus, the above-described effect can be realized.

請求項３記載の発明の構成を採れば、前記回転阻止部材が前記係合部と係合することにより前記円筒型刃物と前記工具装着部材との相対回転を阻止するため、前記相対回転をより確実に阻止することが可能となる。 If the structure of invention of Claim 3 is taken, since the said rotation prevention member will engage with the said engaging part, in order to prevent the relative rotation of the said cylindrical blade and the said tool mounting member, the said relative rotation is made more. It becomes possible to prevent it reliably.

請求項４記載の発明の構成を採れば、前記固定位置で、前記貫通孔内の係止部材を係止位置に拘束し、前記解除位置で前記係止部材を前記退避位置側に開放するように、前記固定部材の形状を設定するだけで、この固定部材の移動により前記センタードリルが前記本体部に対して固定される状態と着脱可能な状態との切替を行うことが可能となる。 If the structure of the invention of Claim 4 is taken, the locking member in the through-hole is restrained to the locking position at the fixed position, and the locking member is opened to the retracted position side at the release position. In addition, only by setting the shape of the fixing member, it is possible to switch between the state in which the center drill is fixed to the main body and the state in which the center drill is detachable by the movement of the fixing member.

請求項５記載の発明の構成を採れば、前記固定部材は、前記本体部に対して移動可能な状態で外嵌することにより、前記解除位置と前記固定位置との間を移動可能とすることが可能となるため、簡素な構造で、前記解除位置と前記固定位置との間を移動可能とすることが可能となる。 If the structure of invention of Claim 5 is taken, the said fixing member shall be movable between the said release position and the said fixed position by carrying out the external fitting in the state which can move with respect to the said main-body part. Therefore, it becomes possible to move between the release position and the fixed position with a simple structure.

本実施形態における工具連結機構について、図１〜図７を用いて説明する。 The tool connection mechanism in this embodiment is demonstrated using FIGS.

この工具連結機構は、駆動源を備えた図略の工具本体の先端側に設けられているものであり、図１に示すような円筒型刃物１０と、センタードリル２０と、工具装着部材３０とを有している。 This tool coupling mechanism is provided on the tip side of a tool body (not shown) provided with a drive source, and includes a cylindrical blade 10, a center drill 20, a tool mounting member 30 as shown in FIG. have.

円筒型刃物１０は、その先端部分（図１では下端部分）に周方向に並ぶ複数の切欠０１ａを有し、各切欠１０ａの角部にチップ状の切断刃１１が固着されている。円筒型刃物１０の基端部分（図１では上端部分）には、工具装着部材３０を係脱可能に外嵌するための取付筒部１２が形成されている。この取付筒部１２の内周面には、周方向に並ぶ複数の凹部が形成され、各凹部に剛球１２１が埋め込まれており、この剛球１２１の一部が取付筒部１２の内周面から内方に突出することにより、工具装着部材３０に係止される突起が形成されている（図５参照）。一方、取付筒部１２の端部には、後述する本体部４０の回転阻止部５１が嵌り込み可能な係合用切欠１２２が形成されている。 The cylindrical blade 10 has a plurality of cutouts 01a arranged in the circumferential direction at the tip portion (the lower end portion in FIG. 1), and a chip-like cutting blade 11 is fixed to a corner portion of each cutout 10a. At the base end portion (upper end portion in FIG. 1) of the cylindrical cutter 10, an attachment tube portion 12 for externally fitting the tool mounting member 30 so as to be detachable is formed. A plurality of concave portions arranged in the circumferential direction are formed on the inner peripheral surface of the mounting cylinder portion 12, and a rigid sphere 121 is embedded in each concave portion, and a part of the rigid sphere 121 extends from the inner peripheral surface of the mounting cylinder portion 12. By projecting inward, a protrusion that is locked to the tool mounting member 30 is formed (see FIG. 5). On the other hand, an engagement notch 122 into which a rotation prevention part 51 of the main body part 40 to be described later can be fitted is formed at the end of the mounting cylinder part 12.

センタードリル２０は、図３に示すとおり、先端側にドリル刃２１を有し、基端部２２には、略六角柱の形状に形成された嵌合部２２１と、この嵌合部２２１よりも先端側に位置して他の２０の部分より若干小径に形成された凹部２２２とを備えている。 As shown in FIG. 3, the center drill 20 has a drill blade 21 on the distal end side. The base end portion 22 has a fitting portion 221 formed in a substantially hexagonal column shape, and more than the fitting portion 221. And a concave portion 222 which is located on the distal end side and is slightly smaller in diameter than the other 20 portions.

工具装着部材３０は、円筒型刃物１０及びセンタードリル２０を駆動源を備えた工具本体に接続するものであり、図１、図２に示すとおり、本体部４０と固定部材５０とを備えている。 The tool mounting member 30 connects the cylindrical blade 10 and the center drill 20 to a tool body provided with a drive source, and includes a body portion 40 and a fixing member 50 as shown in FIGS. 1 and 2. .

本体部４０は、前記工具本体の回転軸に連結されるシャンク部４１と、円筒型刃物１０及びセンタードリル２０が取り付けられる取付部４２とを備えている。 The main body portion 40 includes a shank portion 41 connected to the rotation shaft of the tool main body, and an attachment portion 42 to which the cylindrical blade 10 and the center drill 20 are attached.

取付部４２は、円筒状の外周面を有し、その軸方向中間部に径方向外側に突出する鍔部４３が形成され、この鍔部４３の周方向の一部に、その外周部分を軸方向に貫いて後述の回転阻止部５１が挿通可能な係合用凹部４３１（図１、図７参照）が形成されている。 The mounting portion 42 has a cylindrical outer peripheral surface, and a flange portion 43 that protrudes radially outward is formed at an axial intermediate portion thereof. The outer peripheral portion is pivoted on a part of the circumferential direction of the flange portion 43. An engaging recess 431 (see FIGS. 1 and 7) through which the rotation prevention unit 51 described later can be inserted is formed.

この鍔部４３の先端側に位置する先端部４４の外周部分には係合溝４５が形成されている。この取付部４２の軸心部分には先端側に開口するドリル取付孔４６が形成され、取付部４２の周壁にはこれを径方向に貫いてドリル取付孔４６と取付部４２の外部とを連通する貫通孔４７が形成されている。 An engaging groove 45 is formed in the outer peripheral portion of the tip portion 44 located on the tip side of the flange portion 43. A drill mounting hole 46 that opens to the distal end side is formed in the axial center portion of the mounting portion 42, and the drill mounting hole 46 communicates with the outside of the mounting portion 42 through the peripheral wall of the mounting portion 42 in the radial direction. A through hole 47 is formed.

係合溝４５は、前記剛球１２１と係合するものであり（図５参照）、図４に示すとおり、先端部４４の先端部分から鍔部４３に向けて軸方向に延設された縦溝部４５１と、縦溝部４５１の基端部分から略周方向に延設された横溝部４５２とを備えている。 The engaging groove 45 engages with the rigid sphere 121 (see FIG. 5), and as shown in FIG. 4, a longitudinal groove portion extending in the axial direction from the tip portion of the tip portion 44 toward the flange portion 43. 451 and a lateral groove portion 452 extending substantially in the circumferential direction from the base end portion of the longitudinal groove portion 451.

ドリル取付孔４６は、センタードリル２０を本体部４０に取り付けるための孔であり、図２に示すとおり、本体挿入孔４６１と係合孔４６２とを備えている。本体挿入孔４６１は、センタードリル２０のドリル刃２１及び凹部２２２が収納される部分である。係合孔４６２は、略六角柱の形状に形成されており、センタードリル２０の嵌合部２２１と嵌合し、センタードリル２０と本体部４０とが相対回転することを阻止する。 The drill attachment hole 46 is a hole for attaching the center drill 20 to the main body portion 40 and includes a main body insertion hole 461 and an engagement hole 462 as shown in FIG. The main body insertion hole 461 is a portion in which the drill blade 21 and the recess 222 of the center drill 20 are accommodated. The engagement hole 462 is formed in a substantially hexagonal column shape, is fitted with the fitting portion 221 of the center drill 20, and prevents the center drill 20 and the main body portion 40 from rotating relative to each other.

貫通孔４７は、取付部４２の外周部分と本体挿入孔４６１との間を貫通するように設けられ、その内部及び周辺にはドリル拘束手段６０が配置されている。 The through-hole 47 is provided so as to penetrate between the outer peripheral portion of the attachment portion 42 and the main body insertion hole 461, and the drill restraining means 60 is disposed inside and around the through-hole 47.

ドリル拘束手段６０は、鋼球６１（係止部材に相当）と、線ばね６２とを備えている。鋼球６１は、本体挿入孔４６１の周縁から少し突出した係止位置と、この位置から取付部４２の外周側へ退避する退避位置との間で、貫通孔４７内を移動するものであり、前記センタードリル２０がドリル取付孔４６に嵌合しているときに、この鋼球６１が本体挿入孔４６１の周縁から前記係止位置まで突出すると、この鋼球６１は、前記センタードリル２０の凹部２２２に嵌り込まれる構成となっている。なお、図２に示された鋼球６１は、後述する通り、前記凹部２２２に嵌り込まれる位置となっている。 The drill restraining means 60 includes a steel ball 61 (corresponding to a locking member) and a wire spring 62. The steel ball 61 moves in the through hole 47 between a locking position that slightly protrudes from the peripheral edge of the main body insertion hole 461 and a retreat position that retreats from this position to the outer peripheral side of the mounting portion 42. When the steel ball 61 protrudes from the peripheral edge of the main body insertion hole 461 to the locking position when the center drill 20 is fitted in the drill mounting hole 46, the steel ball 61 becomes a concave portion of the center drill 20. It is configured to be fitted into 222. Note that the steel ball 61 shown in FIG. 2 is in a position to be fitted into the recess 222 as described later.

線ばね６２は、取付部４２の外周のうち、貫通孔４７が形成されている位置を取り巻くように配置されており、鋼球６１を取付部４２の内周側に付勢している。すなわち、前記センタードリル２０の着脱は、後に詳述するように鋼球６１がこの線ばね６２の付勢力に抗して取付部４２の外周側に退避する動作を伴いながら行われる。 The wire spring 62 is arranged so as to surround the position where the through hole 47 is formed in the outer periphery of the mounting portion 42, and biases the steel ball 61 toward the inner peripheral side of the mounting portion 42. That is, the attachment / detachment of the center drill 20 is performed while the steel ball 61 is retracted to the outer peripheral side of the attachment portion 42 against the urging force of the wire spring 62 as described later in detail.

固定部材５０は、略円筒状をなし、前記取付部４２に外嵌された状態で配置されている。この固定部材５０には、取付部４２の外周に略当接する当接部５０ａを備えている。また、固定部材５０の先端には、先端側に突出する複数の回転阻止部５１が形成されるとともに、固定部材５０の内周面には、この固定部材５０を付勢するための付勢手段７０を収納するための付勢手段収納部５２が凹設されている。 The fixing member 50 has a substantially cylindrical shape and is arranged in a state of being fitted on the mounting portion 42. The fixing member 50 includes a contact portion 50 a that substantially contacts the outer periphery of the attachment portion 42. In addition, a plurality of rotation blocking portions 51 projecting toward the distal end side are formed at the distal end of the fixing member 50, and an urging means for urging the fixing member 50 is disposed on the inner peripheral surface of the fixing member 50. An urging means storage portion 52 for storing 70 is recessed.

回転阻止部５１は、くさび状に形成され、固定部材５０の外周に沿って略等間隔に複数形成されている。なお、回転阻止部５１のうち、取付部４２と対向する面である内周面５１ａは、当接部５０ａよりも外周側に位置するように形成されている。また、付勢手段収納部５２は、シャンク部４１側に開放された形状を有し、その反対側には付勢手段当接部５２１が形成されている。 The rotation blocking portions 51 are formed in a wedge shape, and a plurality of rotation blocking portions 51 are formed at substantially equal intervals along the outer periphery of the fixing member 50. In addition, the inner peripheral surface 51a which is a surface which opposes the attaching part 42 among the rotation prevention parts 51 is formed so that it may be located in the outer peripheral side rather than the contact part 50a. Further, the biasing means storage portion 52 has a shape opened to the shank portion 41 side, and a biasing means contact portion 521 is formed on the opposite side.

付勢手段７０は、係止部７１と、ばね部材７２とを備えている。係止部７１は付勢手段収納部５２から回転阻止部５１側に離れた位置で取付部４２の外周面に固定されており、この係止部７１と付勢手段収納部５２との間に圧縮状態でばね部材７２が装入されている。そして、このばね部材７２の弾発力により、固定部材５０は、工具先端側（図２においては右側）に付勢されている。 The urging means 70 includes a locking portion 71 and a spring member 72. The locking portion 71 is fixed to the outer peripheral surface of the mounting portion 42 at a position away from the biasing means storage portion 52 toward the rotation prevention portion 51, and between the locking portion 71 and the biasing means storage portion 52. The spring member 72 is inserted in the compressed state. And the fixing member 50 is urged | biased by the elastic force of this spring member 72 at the tool front end side (right side in FIG. 2).

次に、この工具連結機構による円筒型刃物１０並びにセンタードリル２０と、工具装着部材３０との連結状態について説明する。 Next, a connection state between the tool mounting member 30 and the cylindrical blade 10 and the center drill 20 by the tool connection mechanism will be described.

図２及び図５は、工具装着部材３０に円筒型刃物１０が固定された状態を示している。円筒型刃物１０は、工具装着部材３０の本体部４０の取付部４２に、円筒型刃物１０の取付筒部１２が外嵌することにより連結されている。さらに、取付筒部１２の剛球１２１が取付部４２に形成された横溝部４５２の奥部まで侵入することにより抜け止めされている。そして、固定部材５０の先端に形成された回転阻止部５１が本体部４０の鍔部４３の係合用凹部４３１（図１、図７参照）及び係合用切欠１２２に嵌合する位置（固定位置に相当。以下、固定位置と称す。）に、固定部材５０が配置されることにより、円筒型刃物１
０及びセンタードリル２０及び工具装着部材３０が相互に回転することが阻止されている。そして、これらの部材が相互に回転することが阻止されることにより、前記剛球１２１が横溝部４５２に位置する状態に固定されることになり、円筒型刃物１０は工具装着部材３０に取り付けられた状態で固定されている。なお、固定部材５０は、前記付勢手段７０により前記固定位置に保持されるように付勢されている。 2 and 5 show a state in which the cylindrical blade 10 is fixed to the tool mounting member 30. FIG. The cylindrical cutter 10 is connected to the mounting portion 42 of the main body 40 of the tool mounting member 30 by fitting the mounting cylinder portion 12 of the cylindrical cutter 10 on the outside. Further, the rigid sphere 121 of the mounting cylinder portion 12 is prevented from coming off by intruding to the back of the lateral groove portion 452 formed in the mounting portion 42. Then, the rotation preventing portion 51 formed at the tip of the fixing member 50 is fitted into the engaging recess 431 (see FIGS. 1 and 7) and the engaging notch 122 of the flange portion 43 of the main body portion 40 (in the fixing position). (Hereinafter, referred to as “fixed position”), the cylindrical member 1 is disposed by the fixing member 50 being disposed.
0 and the center drill 20 and the tool mounting member 30 are prevented from rotating relative to each other. Then, when these members are prevented from rotating with each other, the rigid sphere 121 is fixed in a state of being positioned in the lateral groove portion 452, and the cylindrical blade 10 is attached to the tool mounting member 30. It is fixed in the state. The fixing member 50 is urged by the urging means 70 so as to be held at the fixed position.

さらに、かかる状態においては、センタードリル２０がドリル取付孔４６に取り付けられている場合、工具装着部材３０に、センタードリル２０が固定されることになる。以下、図６を用いて工具装着部材３０にセンタードリル２０が固定されている状態を説明する。 Furthermore, in this state, when the center drill 20 is attached to the drill attachment hole 46, the center drill 20 is fixed to the tool attachment member 30. Hereinafter, a state in which the center drill 20 is fixed to the tool mounting member 30 will be described with reference to FIG.

センタードリル２０の基端部２２の嵌合部２２１は、取付部４２に形成されたドリル取付孔４６の係合孔４６２に嵌合されることにより、センタードリル２０と工具装着部材３０とが相対回転することが阻止されている。さらに、貫通孔４７内にある鋼球６１が、線ばね６２による付勢力により、係合孔４６２の内周から突出し、その位置（係止位置に相当。以下、係止位置と称す。）で、基端部２２の凹部２２２に嵌合されている。さらに、線ばね６２の径方向外側には取付部４２の外周面に略密着する固定部材５０の当接面５０ａが存在することにより、線ばね６２及び鋼球６１が取付部４２の外周側に退避することが阻止され、鋼球６１が凹部２２２に嵌合した状態が維持されている。すなわち、固定部材５０が前記固定位置に位置することによりドリル拘束手段６０が、センタードリル２０を着脱不能に拘束する拘束状態に保持されている。 The fitting portion 221 of the base end portion 22 of the center drill 20 is fitted into the engagement hole 462 of the drill attachment hole 46 formed in the attachment portion 42, so that the center drill 20 and the tool mounting member 30 are relative to each other. Rotation is prevented. Further, the steel ball 61 in the through-hole 47 protrudes from the inner periphery of the engagement hole 462 by the urging force of the wire spring 62, and at that position (corresponding to a locking position; hereinafter referred to as a locking position). The base end 22 is fitted in the recess 222. Further, the wire spring 62 and the steel ball 61 are disposed on the outer peripheral side of the mounting portion 42 because the contact surface 50 a of the fixing member 50 that is substantially in close contact with the outer peripheral surface of the mounting portion 42 exists outside the wire spring 62 in the radial direction. Retraction is prevented and the state in which the steel ball 61 is fitted in the recess 222 is maintained. That is, when the fixing member 50 is located at the fixing position, the drill restraining means 60 is held in a restraining state in which the center drill 20 is restrained so as not to be detachable.

次に、図７において、工具装着部材３０から円筒型刃物１０を着脱可能にする状態を示す。固定部材５０は、付勢手段７０からの付勢力に抗して前記固定位置から基端側（図２、図７においては左側）に移動され、前記係合用凹部４３１（図１、図７参照）並びに前記係合用切欠１２２から前記回転阻止部５１がシャンク部４１側に抜け出た位置（解除位置に相当。以下、解除位置と称す。）に配置されている。 Next, in FIG. 7, a state in which the cylindrical blade 10 is detachable from the tool mounting member 30 is shown. The fixing member 50 is moved from the fixed position to the base end side (left side in FIGS. 2 and 7) against the urging force from the urging means 70, and the engaging recess 431 (see FIGS. 1 and 7). ) And the position where the rotation preventing portion 51 is pulled out from the engagement notch 122 toward the shank portion 41 (corresponding to a release position, hereinafter referred to as a release position).

すなわち、円筒型刃物１０と工具装着部材３０とが相互に回転することが可能となり、前記剛球１２１が横溝部４５２（図５参照）に位置する状態では、円筒型刃物１０と工具装着部材３０とを相対回転させることにより、剛球１２１を縦溝部４５１と横溝部４５２とが交わる位置に配置する状態まで移動させることが可能となる。さらに、剛球１２１を縦溝部４５１と横溝部４５２とが交わる位置に位置させた状態で円筒型刃物１０を工具装着部材３０に対して軸方向に移動させ、縦溝部４５１内において剛球１２１を移動させることにより、円筒型刃物１０を工具装着部材３０から取り外すことが可能となる。 That is, the cylindrical blade 10 and the tool mounting member 30 can rotate with each other, and when the rigid ball 121 is located in the lateral groove 452 (see FIG. 5), the cylindrical blade 10 and the tool mounting member 30 By relatively rotating the spheres, it is possible to move the rigid sphere 121 to a state where it is arranged at a position where the vertical groove portion 451 and the horizontal groove portion 452 intersect. Further, the cylindrical blade 10 is moved in the axial direction with respect to the tool mounting member 30 in a state where the rigid ball 121 is positioned at a position where the longitudinal groove portion 451 and the lateral groove portion 452 intersect, and the rigid ball 121 is moved in the longitudinal groove portion 451. Thus, the cylindrical blade 10 can be removed from the tool mounting member 30.

さらに、かかる状態においては、センタードリル２０がドリル取付孔４６に取り付けられている場合、工具装着部材３０からセンタードリル２０を取り外すことが可能となる。以下、図８を用いて工具装着部材３０からセンタードリル２０を取り外す状態を説明する。 Furthermore, in this state, when the center drill 20 is attached to the drill attachment hole 46, the center drill 20 can be removed from the tool attachment member 30. Hereinafter, the state which removes the center drill 20 from the tool mounting member 30 is demonstrated using FIG.

前記固定部材５０が前記解除位置に位置することにより、前記取付部４２の外周部分のうち、前記線ばね６２が配置されている位置には固定部材５０の当接部５０ａが存在せず、当接部５０ａの外周側に位置する回転阻止部５１の内周面５１ａが存在するため、取付部４２の外周のうち貫通孔４７が形成された部分と固定部材５０の内周面５１ａとの間には間隙が形成されている。したがって、鋼球６１及び線ばね６２は、前記係止位置から取付部４２の外周側に退避することが可能となる。よって、センタードリル２０を、ドリル取付孔４６から抜き出すように引き出すと、鋼球６１は線ばね６２の付勢力に抗して解除位置から取付部４２の外周側に退避する位置（退避位置に相当。以下、退避位置と称す。）に移動し、鋼球６１と凹部２２２との嵌合が外れ、センタードリル２０を工具装着部材
３０の本体部４０から取り外すことが可能となる。すなわち、固定部材５０が前記退避位置に位置することにより、ドリル拘束手段６０は、センタードリル２０を本体部４０に対して着脱可能な着脱許容状態とされている。 Since the fixing member 50 is located at the release position, the contact portion 50a of the fixing member 50 does not exist at the position where the wire spring 62 is disposed in the outer peripheral portion of the attachment portion 42, Since there is an inner peripheral surface 51 a of the rotation preventing portion 51 located on the outer peripheral side of the contact portion 50 a, between the portion of the outer periphery of the attachment portion 42 where the through hole 47 is formed and the inner peripheral surface 51 a of the fixing member 50. A gap is formed in. Therefore, the steel ball 61 and the wire spring 62 can be retracted from the locking position to the outer peripheral side of the mounting portion 42. Therefore, when the center drill 20 is pulled out so as to be extracted from the drill mounting hole 46, the steel ball 61 is retracted from the release position to the outer peripheral side of the mounting portion 42 against the urging force of the wire spring 62 (corresponding to the retracted position). (Hereinafter referred to as the retracted position), the fitting between the steel ball 61 and the recess 222 is released, and the center drill 20 can be removed from the main body 40 of the tool mounting member 30. That is, when the fixing member 50 is located at the retracted position, the drill restraining means 60 is in an attachable / detachable state in which the center drill 20 can be attached to and detached from the main body 40.

なお、図９、図１０に示すように、前記固定部材を、前記固定位置と前記解除位置との間の特定の中間位置に位置させることにより、本体部４０とセンタードリル２０との固定状態を維持しながらも本体部４０と円筒型刃物１０との相対回転のみを許容する状態にすることも可能である。 9 and 10, the fixing member is positioned at a specific intermediate position between the fixing position and the release position, thereby fixing the main body 40 and the center drill 20 in a fixed state. It is possible to allow only the relative rotation between the main body 40 and the cylindrical blade 10 while maintaining it.

この位置では、前記回転阻止部５１は、前記係合用凹部４３１及び係合用切欠１２２に嵌合せずに鍔部４３と接触する状態で配置され、円筒型刃物１０及びセンタードリル２０及び工具装着部材３０が相互に回転することが可能となっている。 In this position, the rotation preventing portion 51 is disposed in a state in which the rotation preventing portion 51 is in contact with the flange portion 43 without being fitted into the engaging concave portion 431 and the engaging notch 122, and the cylindrical cutting tool 10, the center drill 20, and the tool mounting member 30. Can rotate with each other.

また、前記固定部材５０は、前記取付部４２のうち、前記線ばね６２が配置されている位置の外周に存在しているため、鋼球６１及び線ばね６２は、前記係止位置から取付部４２の外周側に退避することが阻止されている。すなわちドリル拘束手段６０は、センタードリル２０を着脱不能に拘束する拘束状態となっている。 Further, since the fixing member 50 is present on the outer periphery of the mounting portion 42 at the position where the wire spring 62 is disposed, the steel ball 61 and the wire spring 62 are attached to the mounting portion from the locking position. Retraction to the outer peripheral side of 42 is prevented. That is, the drill restraint means 60 is in a restrained state that restrains the center drill 20 so as not to be detachable.

したがって、円筒型刃物１０と工具装着部材３０とは相対回転可能であり、円筒型刃物１０を工具装着部材３０から取り外すことが可能であるが、センタードリル２０は工具装着部材３０の本体部４０に固定されている。 Therefore, the cylindrical blade 10 and the tool mounting member 30 can be rotated relative to each other, and the cylindrical blade 10 can be detached from the tool mounting member 30, but the center drill 20 is attached to the main body portion 40 of the tool mounting member 30. It is fixed.

さらに、以下に、円筒型刃物１０並びにセンタードリル２０を工具装着部材３０に取り付ける手順、及び、円筒型刃物１０並びにセンタードリル２０を工具装着部材３０から取り外す手順について説明する。 Further, a procedure for attaching the cylindrical blade 10 and the center drill 20 to the tool mounting member 30 and a procedure for removing the cylindrical blade 10 and the center drill 20 from the tool mounting member 30 will be described below.

円筒型刃物１０並びにセンタードリル２０を工具装着部材３０に取り付けるときは、まず、前記固定部材５０を、前記付勢手段７０の付勢力に抗して前記固定部材から前記解除位置に移動させる。 When attaching the cylindrical blade 10 and the center drill 20 to the tool mounting member 30, first, the fixing member 50 is moved from the fixing member to the release position against the urging force of the urging means 70.

次に、センタードリル２０をドリル取付孔４６内に挿入して、センタードリル２０の嵌合部２２１をドリル取付孔４６の係合孔４６２に嵌合させることにより、センタードリル２０を工具装着部材３０の本体部４０に取り付ける。 Next, the center drill 20 is inserted into the drill attachment hole 46 and the fitting portion 221 of the center drill 20 is fitted into the engagement hole 462 of the drill attachment hole 46, whereby the center drill 20 is fitted to the tool attachment member 30. It attaches to the main-body part 40.

さらに、円筒型刃物１０の取付筒部１２の剛球１２１を、本体部４０の取付部４２に形成された縦溝部４５１に嵌め込み、この剛球１２１を縦溝部４５１内において移動させ、剛球１２１を縦溝部４５１と横溝部４５２とが交わる部分に位置させることにより取付筒部１２と取付部４２とを嵌合させ、かかる状態で円筒型刃物１０と本体部４０とを相対回転させることにより、横溝部４５２内において剛球１２１を移動させることにより、前記円筒型刃物１０が本体部４０から抜け出すことを阻止した状態で、円筒型刃物１０を本体部４０に取り付ける。 Further, the rigid sphere 121 of the mounting cylinder portion 12 of the cylindrical cutter 10 is fitted into the vertical groove portion 451 formed in the mounting portion 42 of the main body portion 40, and the rigid sphere 121 is moved in the vertical groove portion 451, and the rigid sphere 121 is moved to the vertical groove portion. The mounting cylinder portion 12 and the mounting portion 42 are fitted to each other by being positioned at a portion where the 451 and the lateral groove portion 452 intersect, and the cylindrical blade 10 and the main body portion 40 are rotated relative to each other in such a state, whereby the horizontal groove portion 452. The cylindrical blade 10 is attached to the main body 40 in a state where the cylindrical blade 10 is prevented from coming out of the main body 40 by moving the rigid sphere 121 inside.

最後に、前記固定部材５０を、前記付勢手段７０からの付勢力で前記解除位置から前記固定位置に移動させることにより、センタードリル２０を本体部４０に固定するとともに、円筒型刃物１０を本体部４０に対して回転することを阻止して円筒型刃物１０を工具装着部材３０に固定する。なお、固定部材５０は、付勢手段７０からの付勢力により固定位置に保持される。また、センタードリル２０を本体部４０に取り付ける手順と、円筒型刃物１０の本体部４０に取り付ける手順とは、特に順番を固定する必要はなく、いずれの手順を先に行ってもよい。 Finally, the center drill 20 is fixed to the main body 40 by moving the fixing member 50 from the release position to the fixing position by the urging force from the urging means 70, and the cylindrical blade 10 is moved to the main body. The cylindrical cutter 10 is fixed to the tool mounting member 30 by preventing rotation with respect to the portion 40. The fixing member 50 is held at a fixed position by the urging force from the urging means 70. In addition, the procedure for attaching the center drill 20 to the main body portion 40 and the procedure for attaching the center drill 20 to the main body portion 40 of the cylindrical blade 10 do not have to be fixed in particular order, and either procedure may be performed first.

この装着状態から、円筒型刃物１０並びにセンタードリル２０を工具装着部材３０から取り外すときは、前記固定部材５０を、前記付勢手段７０からの付勢力に抗して前記固定部材から前記解除位置に移動させればよい。 When the cylindrical blade 10 and the center drill 20 are removed from the tool mounting member 30 from this mounted state, the fixing member 50 is moved from the fixing member to the release position against the biasing force from the biasing means 70. Move it.

この解除位置では、固定部材５０がドリル拘束手段６０を着脱許容状態にするので、この状況で、ドリル取付孔４６に挿入されたセンタードリル２０をドリル取付孔４６から抜き出して工具装着部材３０の本体部４０から取り外すことができる。 At this release position, the fixing member 50 puts the drill restraining means 60 into the attachable / detachable state. In this state, the center drill 20 inserted into the drill mounting hole 46 is extracted from the drill mounting hole 46 and the main body of the tool mounting member 30 It can be removed from the part 40.

その一方、円筒型刃物１０は本体部４０に対する相対回転が許容されるので、この相対回転によって、円筒型刃物１０の取付筒部１２の剛球１２１を、剛球１２１を縦溝部４５１と横溝部４５２とが交わる部分に位置させ、かかる状態で円筒型刃物１０を本体部４０に対し軸方向に移動させ、剛球１２１を縦溝部４５１内において移動させることにより、円筒型刃物１０を本体部４０から取り外す。なお、センタードリル２０を本体部４０から取り外す手順と、円筒型刃物１０を本体部４０から取り外す手順とは、特に順番を固定する必要はなく、いずれの手順を先に行ってもよい。 On the other hand, since the cylindrical blade 10 is allowed to rotate relative to the main body 40, the relative rotation causes the rigid sphere 121 of the mounting cylinder portion 12 of the cylindrical blade 10 to move the rigid ball 121 into the vertical groove portion 451 and the horizontal groove portion 452. The cylindrical cutter 10 is removed from the main body 40 by moving the cylindrical blade 10 in the axial direction with respect to the main body 40 in this state and moving the rigid ball 121 in the vertical groove 451. The procedure for removing the center drill 20 from the main body 40 and the procedure for removing the cylindrical blade 10 from the main body 40 do not have to be fixed in particular order, and either procedure may be performed first.

以上の実施形態を採れば、固定部材５０のみで、円筒型刃物１０が本体部４０から抜け出すことを阻止するとともにセンタードリル２０が本体部４０から抜け出すことを阻止することが可能となるため、円筒型刃物１０の着脱切替及びセンタードリル２０の着脱切替にそれぞれ別々の部材を用いる場合に比べ、構造全体の軸長を短くすることが可能となる。 If the above embodiment is adopted, only the fixing member 50 can prevent the cylindrical blade 10 from coming out of the main body 40 and the center drill 20 can be prevented from coming out of the main body 40. The axial length of the entire structure can be shortened as compared with the case where separate members are used for switching the attachment and detachment of the mold cutter 10 and switching the attachment and detachment of the center drill 20, respectively.

さらに、固定部材５０を前記固定位置と前記解除位置とに切り替えるのみで、円筒型刃物１０及びセンタードリル２０を本体部４０に対して着脱可能な状態にすることが可能となる。したがって、作業性を改善することが可能となる。 Furthermore, the cylindrical cutter 10 and the center drill 20 can be attached to and detached from the main body 40 only by switching the fixing member 50 between the fixing position and the release position. Therefore, workability can be improved.

また、固定部材５０は、本体部４０に対して移動可能な状態で外嵌されていることにより前記解除位置と前記固定位置との間を移動可能とすることが可能となるため、簡素な構造で、前記解除位置と前記固定位置との間を移動可能とすることが可能となる。 Further, since the fixing member 50 is externally fitted in a movable state with respect to the main body portion 40, the fixing member 50 can be moved between the release position and the fixing position. Thus, it becomes possible to move between the release position and the fixed position.

さらに、ドリル拘束手段６０を拘束状態にするが、円筒型刃物１０は本体部４０に対し着脱可能とする中間位置を有しているため、円筒型刃物１０のみを取り外すときの作業性を向上させることが可能となる。 Further, although the drill restraining means 60 is in a restrained state, the cylindrical cutter 10 has an intermediate position that allows it to be attached to and detached from the main body 40, so that the workability when removing only the cylindrical cutter 10 is improved. It becomes possible.

また、本実施形態においては、円筒型刃物１０の取付筒部１２に形成された剛球１２１を縦溝部４５１と横溝部４５２とが交わる部分に配置させる状態とすべく円筒型刃物１０と本体部４０とを軸方向に嵌合し、かかる状態で円筒型刃物１０と本体部４０とを相対回転させて剛球１２１を横溝部４５２内に配置させることにより、円筒型刃物１０が本体部４０から抜け出すことが阻止されるように構成されている。したがって、円筒型刃物１０を本体部４０から取り外す際には、一度、剛球１２１が横溝部４５２に位置する状態から、縦溝部４５１と横溝部４５２とが交わる部分に配置させるべく、円筒型刃物１０と本体部４０とを相対回転させて、その後に、円筒型刃物１０と本体部４０との嵌合状態を解除する必要がある。したがって、円筒型刃物１０が本体部４０から抜け出すことをより有効に阻止することが可能となる。 Further, in the present embodiment, the cylindrical cutter 10 and the main body 40 are set so that the rigid sphere 121 formed on the mounting cylinder portion 12 of the cylindrical cutter 10 is disposed at a portion where the vertical groove portion 451 and the horizontal groove portion 452 intersect. Are fitted in the axial direction, and in this state, the cylindrical blade 10 and the main body portion 40 are relatively rotated so that the rigid sphere 121 is disposed in the lateral groove portion 452, so that the cylindrical blade 10 comes out of the main body portion 40. Is configured to be prevented. Therefore, when the cylindrical blade 10 is removed from the main body 40, the cylindrical blade 10 is once arranged so that the rigid sphere 121 is located at the cross groove portion 452 and the portion where the vertical groove portion 451 and the horizontal groove portion 452 intersect. And the main body 40 are rotated relative to each other, and thereafter, the fitting state between the cylindrical blade 10 and the main body 40 needs to be released. Therefore, it is possible to more effectively prevent the cylindrical blade 10 from coming out of the main body 40.

また、回転阻止部５１が取付筒部１２に形成された係合用切欠１２２と係合することにより円筒型刃物１０と工具装着部材３０の本体部４０との相対回転を阻止するため、前記相対回転をより確実に阻止することが可能となる。 Further, since the rotation preventing portion 51 is engaged with the engagement notch 122 formed in the mounting cylinder portion 12, the relative rotation between the cylindrical blade 10 and the main body portion 40 of the tool mounting member 30 is prevented. Can be more reliably prevented.

以上、本発明の実施形態について説明したが、本発明の具体的構成は前記実施形態に限
定されず、特許請求の範囲内で種々変更可能である。以下、他の実施形態について例示する。 As mentioned above, although embodiment of this invention was described, the specific structure of this invention is not limited to the said embodiment, A various change is possible within a claim. Hereinafter, other embodiments will be exemplified.

本体部４０の取付部４２の外周部分に係合溝４５を形成し、円筒型刃物１０の取付筒部１２の内周部に剛球１２１を備える代わりに、取付筒部１２の内周部に係合溝４５を形成し、本体部４０の取付部４２の外周部分に剛球１２１を備えるように構成してもよい。 Instead of providing an engagement groove 45 in the outer peripheral portion of the mounting portion 42 of the main body 40 and providing a rigid ball 121 on the inner peripheral portion of the mounting cylindrical portion 12 of the cylindrical cutter 10, the inner peripheral portion of the mounting cylindrical portion 12 is engaged. The groove 45 may be formed, and the rigid sphere 121 may be provided on the outer peripheral portion of the mounting portion 42 of the main body 40.

また、線ばね６２の代わりに板ばね、ゴム等を用いて鋼球６１を付勢してもよい。 Further, instead of the wire spring 62, the steel ball 61 may be biased by using a leaf spring, rubber or the like.

本発明の一実施形態に係る工具連結構造を示す斜視図である。It is a perspective view which shows the tool connection structure which concerns on one Embodiment of this invention. 本発明の一実施形態に係る工具連結構造において、固定部材が固定位置に配置されている状態を示した一部断面正面図である。In the tool connection structure which concerns on one Embodiment of this invention, it is the partial cross section front view which showed the state by which the fixing member is arrange | positioned in the fixing position. 本発明の一実施形態に係るセンタードリルを示した正面図である。It is the front view which showed the center drill which concerns on one Embodiment of this invention. 本発明の一実施形成に係る本体部における取付部の先端部分を示した一部正面図である。It is the partial front view which showed the front-end | tip part of the attaching part in the main-body part which concerns on one implementation formation of this invention. 図２のＶ−Ｖ線断面図である。It is the VV sectional view taken on the line of FIG. 図２の状態でセンタードリルを取付部に取り付けた状態を示した部分断面図である。It is the fragmentary sectional view which showed the state which attached the center drill to the attaching part in the state of FIG. 本発明の一実施形態に係る工具連結構造において、固定部材が解除位置に配置されている状態を示した一部断面正面図である。In the tool connection structure which concerns on one Embodiment of this invention, it is the partial cross section front view which showed the state by which the fixing member is arrange | positioned in the cancellation | release position. 図７の状態でセンタードリルを取付部から取り外す状態を示した部分断面図である。It is the fragmentary sectional view which showed the state which removes a center drill from an attaching part in the state of FIG. 本発明の一実施形態に係る工具連結構造において、固定部材が中間位置に配置されている状態を示した一部断面正面図である。In the tool connection structure which concerns on one Embodiment of this invention, it is the partial cross section front view which showed the state by which the fixing member is arrange | positioned in the intermediate position. 図９の状態でのドリル拘束手段及びその付近を示した拡大図である。FIG. 10 is an enlarged view showing the drill restraining means and its vicinity in the state of FIG. 9. 従来技術に係る工具連結構造を示す断面正面図である。It is a cross-sectional front view which shows the tool connection structure which concerns on a prior art. 従来技術に係る工具連結構造のうち、円筒型刃物と工具装着部材との関係を示す一部正面図である。It is a partial front view which shows the relationship between a cylindrical blade and a tool mounting member among the tool connection structures which concern on a prior art.

１０円筒型刃物
１１切断刃
１２取付筒部
１２１剛球（突起部）
１２２係合用切欠（係合部）
２０センタードリル
２１ドリル刃
２２基端部
２２２凹部
３０工具装着部材
４０本体部
４１シャンク部
４２取付部
４３１係合用凹部（係合部）
４５係合溝
４５１縦溝部
４５２横溝部
４６ドリル取付孔（センタードリル挿入孔）
４７貫通孔
５０固定部材
５１回転阻止部
６０ドリル拘束手段
６１鋼球（係止部材） DESCRIPTION OF SYMBOLS 10 Cylindrical cutter 11 Cutting blade 12 Mounting cylinder part 121 Hard sphere (projection part)
122 Notch for engagement (engagement part)
20 Center drill 21 Drill blade 22 Base end 222 Recess 30 Tool mounting member 40 Main body 41 Shank part 42 Mounting part 431 Engaging recess (engaging part)
45 Engaging groove 451 Vertical groove 452 Horizontal groove 46 Drill mounting hole (center drill insertion hole)
47 Through-hole 50 Fixing member 51 Rotation prevention part 60 Drill restraint means 61 Steel ball (locking member)

Claims

A tool connection structure for attaching a center drill having a drill blade and a cylindrical cutter to a distal end side of a tool body provided with a drive source via a tool mounting member having a shank portion to be attached to the tool body,
The cylindrical blade has a cutting blade formed at the distal end portion thereof, and an attachment tube portion for externally fitting the tool mounting member detachably on the inner peripheral portion of the proximal end portion,
The tool mounting member is
A main body having an attachment portion for attaching the cylindrical blade and the center drill and the shank portion;
A drill restraining means provided on the main body portion and switchable between a restrained state in which the center drill attached to the main body portion is restrained so as not to be removable and an attachable / detachable allowable state in which the center drill is attachable / detachable;
A fixed position that is attached to the main body portion so as to be relatively movable, and prevents the cylindrical cutter from slipping out of the main body portion and moving the drill restraining means in a restrained state. A fixing member that can be attached to and detached from the part and that can be switched to a release position that places the drill restraining means in an attachable / detachable state ,
The fixing member has an intermediate position between the release position and the fixing position, in which the drill restraining means is in a restrained state, but the cylindrical blade is detachable from the main body. Tool connection structure.

A tool connection structure for attaching a center drill having a drill blade and a cylindrical cutter to a distal end side of a tool body provided with a drive source via a tool mounting member having a shank portion to be attached to the tool body,
The cylindrical blade has a cutting blade formed at the distal end portion thereof, and an attachment tube portion for externally fitting the tool mounting member detachably on the inner peripheral portion of the proximal end portion,
The tool mounting member is
A main body having an attachment portion for attaching the cylindrical blade and the center drill and the shank portion;
A drill restraining means provided on the main body portion and switchable between a restrained state in which the center drill attached to the main body portion is restrained so as not to be removable and an attachable / detachable allowable state in which the center drill is attachable / detachable;
A fixed position that is attached to the main body portion so as to be relatively movable, and prevents the cylindrical cutter from slipping out of the main body portion and moving the drill restraining means in a restrained state. A fixing member that can be attached to and detached from the part and that can be switched to a release position that places the drill restraining means in an attachable / detachable state,
The cylindrical cutter is configured to be prevented from coming out of the main body by rotating relative to a specific angular position in a state where the cylindrical cutter and the main body are fitted in the axial direction. The fixing member prevents relative rotation between the cylindrical blade and the main body at the specific angular position at the fixing position;
A longitudinal groove extending in the axial direction from the tool tip side and a circumference from the longitudinal groove on either the outer peripheral part of the attachment part of the main body part or the inner peripheral part of the attachment cylinder part of the cylindrical cutter. An engaging groove having a lateral groove extending in the direction is formed, and a protrusion that can be removably attached to the engaging groove is formed on the other, and the engaging groove and the protrusion The cylindrical blade and the main body can be fitted in the axial direction by fitting the part,
When the projection is located at a position where the vertical groove and the horizontal groove intersect, the cylindrical blade and the main body are relatively rotated, and the angular position at which the projection is located in the horizontal groove, A tool connecting structure, characterized in that a cylindrical cutter is prevented from coming out of the main body.

A tool connection structure for attaching a center drill having a drill blade and a cylindrical cutter to a distal end side of a tool body provided with a drive source via a tool mounting member having a shank portion to be attached to the tool body,
The cylindrical blade has a cutting blade formed at the distal end portion thereof, and an attachment tube portion for externally fitting the tool mounting member detachably on the inner peripheral portion of the proximal end portion,
The tool mounting member is
A main body having an attachment portion for attaching the cylindrical blade and the center drill and the shank portion;
A drill restraining means provided on the main body portion and switchable between a restrained state in which the center drill attached to the main body portion is restrained so as not to be removable and an attachable / detachable allowable state in which the center drill is attachable / detachable;
A fixed position that is attached to the main body portion so as to be relatively movable, and prevents the cylindrical cutter from slipping out of the main body portion and moving the drill restraining means in a restrained state. A fixing member that can be attached to and detached from the part and that can be switched to a release position that places the drill restraining means in an attachable / detachable state,
At the tip of the fixing member, a rotation blocking portion is formed in a shape protruding to the tip side of the fixing member, and
The cylindrical blade and the tool mounting member are formed with an engaging portion for engaging with the rotation preventing portion,
When the fixing member is located at the fixing position, the rotation preventing member engages with the engaging portion to prevent relative rotation between the cylindrical blade and the tool mounting member.
When the fixing member is located at the release position, the rotation preventing member does not engage with the engaging portion , and the cylindrical blade and the tool mounting member can be relatively rotated. Connected structure.

A tool connection structure for attaching a center drill having a drill blade and a cylindrical cutter to a distal end side of a tool body provided with a drive source via a tool mounting member having a shank portion to be attached to the tool body,
The cylindrical blade has a cutting blade formed at the distal end portion thereof, and an attachment tube portion for externally fitting the tool mounting member detachably on the inner peripheral portion of the proximal end portion,
The tool mounting member is
A main body having an attachment portion for attaching the cylindrical blade and the center drill and the shank portion;
A drill restraining means provided on the main body portion and switchable between a restrained state in which the center drill attached to the main body portion is restrained so as not to be removable and an attachable / detachable allowable state in which the center drill is attachable / detachable;
A fixed position that is attached to the main body portion so as to be relatively movable, and prevents the cylindrical cutter from slipping out of the main body portion and moving the drill restraining means in a restrained state. A fixing member that can be attached to and detached from the part and that can be switched to a release position that places the drill restraining means in an attachable / detachable state,
The center drill includes the drill blade and a base end portion in which a recess is formed,
A center drill insertion hole for attaching a base end portion of the center drill is formed in an inner peripheral portion of the attachment portion of the main body, and penetrates the center drill insertion hole and the outer peripheral portion of the attachment portion. A through hole is formed,
The drill restraining means has a locking member held inside the through hole, and the locking member protrudes from an inner periphery of the center drill insertion hole and is formed at a base end portion of the center drill. By fitting into the recess, a locking position that prevents the base end portion of the center drill from coming out of the center drill insertion hole, and the base end portion of the center drill is retracted from the locking position to the outer peripheral side. It moves in the through-hole between the retreat position that enables engagement and disengagement with respect to the center drill insertion hole,
When the fixing member is positioned at the fixing position, the locking member is held at the locking position, and when the fixing member is positioned at the release position, the locking member is movable to the retracted position. A tool connection structure characterized by:

In the tool connection structure in any one of Claims 1-4 ,
The tool connection structure, wherein the fixing member is movable between the release position and the fixed position by being externally fitted to the main body in a movable state.