JP2016195963A

JP2016195963A - Rotor mounting structure and centrifugal separator

Info

Publication number: JP2016195963A
Application number: JP2015076023A
Authority: JP
Inventors: 智戸丸; Satoshi Tomaru
Original assignee: Kubota Seisakusho KK
Current assignee: Kubota Seisakusho KK
Priority date: 2015-04-02
Filing date: 2015-04-02
Publication date: 2016-11-24

Abstract

PROBLEM TO BE SOLVED: To facilitate assembly in a structure in which a rotor can be mounted on a shaft only by simple placement.SOLUTION: A metal fitting 50 is mounted in a rotor hole 41. The metal fitting 50 consists of: a body 60; first and second pieces 70 and 80 disposed in a piece arrangement hole 64 formed by penetrating through the body 60 in a direction orthogonal to a rotation center axis 43 of a rotor 40; a plate spring 90; and a presser 100 loaded on the body 60 to clamp a stem 91 of the plate spring 90 with the body 60. The pieces 70 and 80 have grooves 73 and 83 into which arm parts 94 and 95 of the plate spring 90 are inserted. When the rotor 40 rotates, the pieces 70 and 80 project from the piece arrangement hole 64 by resisting spring force of the plate spring 90 under centrifugal force to come in contact with a rotor coupling part 34 of a shaft 30.SELECTED DRAWING: Figure 2

Description

この発明は遠心分離機に関し、特にロータの取付構造に関する。 The present invention relates to a centrifuge, and more particularly to a rotor mounting structure.

図２３は特許文献１に記載されている遠心分離機の内部構成を示したものであり、図２３中、１は軸心が鉛直方向とされた回転シャフトを示し、２は回転シャフトの上部に取り付けられた回転ヘッドを示す。また、３は回転ヘッド２の上部に配置されるロータを示し、４はロータ３の上部を覆う蓋を示す。 FIG. 23 shows the internal configuration of the centrifuge described in Patent Document 1. In FIG. 23, reference numeral 1 denotes a rotating shaft whose axis is in the vertical direction, and 2 denotes an upper part of the rotating shaft. Fig. 2 shows a mounted rotating head. Reference numeral 3 denotes a rotor disposed on the upper part of the rotary head 2, and reference numeral 4 denotes a lid covering the upper part of the rotor 3.

ロータ３は試料挿入部５を複数備えており、また回転ヘッド２が挿入されるロータ穴６，７、フレーム８、雄型部材９−１，９−２、ガイドピン１０なども備えている。ロータ穴６は直径が一定の円形穴であり、ロータ穴７は直径が穴の内部ほど小さくなった円形穴とされている。 The rotor 3 includes a plurality of sample insertion portions 5 and also includes rotor holes 6 and 7 into which the rotary head 2 is inserted, a frame 8, male members 9-1 and 9-2, guide pins 10, and the like. The rotor hole 6 is a circular hole having a constant diameter, and the rotor hole 7 is a circular hole having a diameter smaller toward the inside of the hole.

雄型部材９−１，９−２はロータ穴６の内部に水平に配置された回転軸１１−１，１１−２を中心として回転自在とされ、重心が回転軸１１−１，１１−２の下方にあり、重心よりも下方の回転シャフト１の軸心１２と反対側に凸部１３−１，１３−２を有する。雄型部材９−１，９−２はフレーム８に取り付けられ、フレーム８はロータ３に取り付けられている。ロータ３は貫通穴１４，１５を備え、フレーム８に形成されている貫通穴１５にはネジが形成されている。 The male members 9-1 and 9-2 are rotatable about the rotation shafts 11-1 and 11-2 disposed horizontally inside the rotor hole 6, and the center of gravity is rotatable about the rotation shafts 11-1 and 11-2. And have convex portions 13-1 and 13-2 on the side opposite to the axis 12 of the rotary shaft 1 below the center of gravity. The male members 9-1 and 9-2 are attached to the frame 8, and the frame 8 is attached to the rotor 3. The rotor 3 includes through holes 14 and 15, and screws are formed in the through holes 15 formed in the frame 8.

回転ヘッド２は上部にロータ結合部１６と駆動ピン１７を備えている。ロータ結合部１６は回転シャフト１の軸心１２を中心とする円筒状であり、内側面に環状の凹部１８を有する。回転ヘッド２はロータ穴６に嵌る円柱部分１９と、ロータ穴７に嵌る円錐台部分２０を備えている。蓋４はつまみ２１と、フレーム８の貫通穴１５にネジ止めするためのネジ部２２を有している。 The rotary head 2 includes a rotor coupling portion 16 and a drive pin 17 at the upper portion. The rotor coupling portion 16 has a cylindrical shape centered on the axis 12 of the rotary shaft 1 and has an annular recess 18 on the inner surface. The rotary head 2 includes a cylindrical portion 19 that fits into the rotor hole 6 and a truncated cone portion 20 that fits into the rotor hole 7. The lid 4 has a knob 21 and a screw portion 22 for screwing into the through hole 15 of the frame 8.

ガイドピン１０は駆動ピン１７の間しか移動できず、回転ヘッド２が回転すると、駆動ピン１７からガイドピン１０に動力が伝えられ、ロータ３が回転する。回転ヘッド２が停止するとロータ３は回転ヘッド２と一緒に停止する。 The guide pin 10 can move only between the drive pins 17. When the rotary head 2 rotates, power is transmitted from the drive pins 17 to the guide pins 10, and the rotor 3 rotates. When the rotary head 2 stops, the rotor 3 stops together with the rotary head 2.

回転シャフト１が停止した状態でロータ３が回転ヘッド２の上に配置されている時には雄型部材９−１，９−２の重心は回転軸１１−１，１１−２の真下となり、この時、雄型部材９−１，９−２はロータ結合部１６の内側にある。 When the rotor 3 is disposed on the rotary head 2 with the rotary shaft 1 stopped, the center of gravity of the male members 9-1 and 9-2 is directly below the rotary shafts 11-1 and 11-2. The male members 9-1 and 9-2 are inside the rotor coupling portion 16.

回転シャフト１が回転すると、遠心力により凸部１３−１，１３−２が凹部１８に嵌るように雄型部材９−１，９−２が可動し、凸部１３−１，１３−２が凹部１８に嵌っている時にロータ３を回転ヘッド２から離脱させるような力（浮上させるような力）が加わると、この例では凸部１３−１，１３−２には凹部１８に嵌る方向に力が加わるものとなっている。従って、回転中に想定していないロータ３を回転ヘッド２から離脱させる力が加わった場合にも凸部１３−１，１３−２と凹部１８とが離れることはなく、確実な固定を実現できるものとなっている。 When the rotating shaft 1 rotates, the male members 9-1 and 9-2 move so that the convex portions 13-1 and 13-2 fit into the concave portion 18 by centrifugal force, and the convex portions 13-1 and 13-2 are moved. In this example, when a force that lifts the rotor 3 away from the rotary head 2 (a force that causes the rotor 3 to float) is applied to the convex portions 13-1 and 13-2, Power is added. Accordingly, even when a force for separating the rotor 3 that is not assumed during rotation from the rotary head 2 is applied, the convex portions 13-1 and 13-2 and the concave portion 18 are not separated from each other, and reliable fixing can be realized. It has become a thing.

特許第５４４２３３７号公報Japanese Patent No. 5442337

上述したように、従来のロータの取付構造は雄型部材９−１，９−２を回転自在としてロータ３に配置し、ロータ３の回転時に生じる遠心力によって雄型部材９−１，９−２が動き（回転し）、雄型部材９−１，９−２の凸部１３−１，１３−２が回転ヘッド２の凹部１８に嵌ることによってロータ３が回転ヘッド２に固定されるものとなっている。 As described above, in the conventional rotor mounting structure, the male members 9-1 and 9-2 are arranged in the rotor 3 so as to be rotatable, and the male members 9-1 and 9- are caused by the centrifugal force generated when the rotor 3 rotates. The rotor 3 is fixed to the rotary head 2 by moving (rotating) 2 and fitting the convex portions 13-1 and 13-2 of the male members 9-1 and 9-2 into the concave portions 18 of the rotary head 2. It has become.

しかるに、このような構造では雄型部材９−１，９−２を回転自在に支持し、かつ雄型部材９−１，９−２を位置決めする回転軸１１−１，１１−２が必要であり、つまり回転軸１１−１，１１−２を構成するピンが必要であり、そのようなピンに雄型部材９−１，９−２を取り付け、さらにピンをロータ３に取り付ける作業は面倒で、組立性に難があるものとなっていた。 However, such a structure requires the rotating shafts 11-1 and 11-2 that rotatably support the male members 9-1 and 9-2 and position the male members 9-1 and 9-2. Yes, that is, the pins constituting the rotating shafts 11-1 and 11-2 are necessary, and attaching the male members 9-1 and 9-2 to such pins and further attaching the pins to the rotor 3 is troublesome. It was difficult to assemble.

この発明の目的はこの問題に鑑み、置くだけでロータが確実に固定されるようにし、かつロータ側の組立も簡易に行えるようにしたロータの取付構造を提供することにある。 In view of this problem, an object of the present invention is to provide a rotor mounting structure that allows a rotor to be securely fixed only by placing it and that assembly on the rotor side can be easily performed.

請求項１の発明によれば、遠心分離機におけるシャフトへのロータの取付構造において、シャフトの先端側は円筒形状をなすロータ結合部とされ、ロータ結合部の内周面に環状凹部が形成されて環状凹部より先端側には環状凸部が構成され、環状凸部の内周面の環状凹部側の角部には面取りが施されて第１シャフト傾斜面が形成され、第１シャフト傾斜面から環状凹部の底面に至る面は底面と鋭角をなす第２シャフト傾斜面とされ、ロータはシャフトが挿入されるロータ穴を有し、ロータ穴内に取付金具が配置される。取付金具は、ロータ結合部に収容される本体と、本体にロータの回転中心軸と直交する方向に貫通形成された駒配置穴に配置された第１及び第２の駒と、基部と、基部の両端から同一方向に折り曲げ形成された長短２つの延長部と、各延長部の先端から互いに回転中心軸を囲むように円弧状に延長形成された２つの腕部とを備え、本体に駒配置穴と連通するように駒配置穴の上方に形成された開口を介して延長部及び腕部が駒配置穴に挿入された板ばねと、本体上に搭載されて本体との間に前記基部を挟み込む抑えとよりなる。第１の駒は長い方の延長部に形成された腕部が差し込まれる第１の溝を有し、第１の溝を挟んで駒配置穴の一端側に位置する第１の側壁部と回転中心軸上に位置する第１の中央部とを備え、第２の駒は短い方の延長部に形成された腕部が差し込まれる第２の溝を有し、第２の溝を挟んで駒配置穴の他端側に位置する第２の側壁部と第１の中央部上に位置する第２の中央部とを備え、第１の側壁部及び第２の側壁部の各外側面は円弧形状をなし、上端には第１シャフト傾斜面と第２シャフト傾斜面とがなす形状と対応する第１傾斜面と第２傾斜面とがそれぞれ形成され、ロータの停止状態では第１及び第２の駒はそれぞれ腕部により位置決めされて駒配置穴内に位置し、シャフトの回転により、ロータが回転すると、第１及び第２の駒は遠心力により板ばねのばね力に抗して駒配置穴の一端及び他端からそれぞれ突出するように移動して第１傾斜面が第１シャフト傾斜面に当接し、シャフトに対するロータの浮き上がりは第２傾斜面が第２シャフト傾斜面に当接することによって阻止される。 According to the first aspect of the present invention, in the attachment structure of the rotor to the shaft in the centrifuge, the front end side of the shaft is a cylindrical rotor coupling portion, and an annular recess is formed on the inner peripheral surface of the rotor coupling portion. An annular convex portion is formed on the tip side from the annular concave portion, and a corner of the inner peripheral surface of the annular convex portion on the annular concave portion side is chamfered to form a first shaft inclined surface, and the first shaft inclined surface is formed. A surface extending from the bottom to the bottom of the annular recess is a second shaft inclined surface that forms an acute angle with the bottom, and the rotor has a rotor hole into which the shaft is inserted, and a mounting bracket is disposed in the rotor hole. The mounting bracket includes a main body accommodated in the rotor coupling portion, first and second pieces arranged in a piece arrangement hole formed in the main body in a direction perpendicular to the rotation center axis of the rotor, a base portion, and a base portion Two extension parts, which are bent in the same direction from both ends of the two parts, and two arm parts extended in an arc shape so as to surround the rotation center axis from the tip of each extension part, and the piece is arranged on the main body The base portion is mounted between the leaf spring in which the extension portion and the arm portion are inserted into the piece placement hole through the opening formed above the piece placement hole so as to communicate with the hole, and the body mounted on the body. It becomes more with restraining. The first piece has a first groove into which an arm formed on the longer extension is inserted, and rotates with the first side wall located on one end side of the piece arrangement hole across the first groove. And a second piece having a second groove into which an arm part formed in a shorter extension part is inserted, and the piece sandwiching the second groove. A second side wall portion located on the other end side of the arrangement hole and a second center portion located on the first center portion, and each outer side surface of the first side wall portion and the second side wall portion is an arc. The upper end is formed with a first inclined surface and a second inclined surface corresponding to the shape formed by the first shaft inclined surface and the second shaft inclined surface at the upper end, respectively, and the first and second in a stopped state of the rotor. When the rotor is rotated by the rotation of the shaft, the first and second pieces are subjected to centrifugal force. The first inclined surface comes into contact with the first shaft inclined surface by projecting from the one end and the other end of the piece arrangement hole against the spring force of the leaf spring, and the lift of the rotor with respect to the shaft is the second inclined The surface is blocked by contacting the inclined surface of the second shaft.

請求項２の発明では請求項１の発明において、第２の駒の底面は第２の側壁部がＵ字の中間部をなすＵ字形状とされ、第１の中央部は一部がＵ字内に位置する形状とされる。 In the invention of claim 2, in the invention of claim 1, the bottom surface of the second piece is U-shaped in which the second side wall portion forms an intermediate portion of the U-shape, and the first central portion is partially U-shaped. It is set as the shape located in.

請求項３の発明では請求項１又は２の発明において、回転中心軸を中心とする穴がロータ穴の底面、前記基部、第１及び第２の中央部及び本体の駒配置穴の下方にそれぞれ貫通形成され、前記穴の位置と一致するねじ穴が抑えに貫通形成され、第１の中央部の前記穴の上端周縁における第１の溝と反対側の部分及び第２の中央部の前記穴の上端周縁における第２の溝と反対側の部分はそれぞれ切り欠かれて傾斜面が形成されているものとされる。 According to a third aspect of the present invention, in the first or second aspect of the present invention, the hole centered on the rotation center axis is located below the bottom surface of the rotor hole, the base, the first and second central portions, and the piece arrangement hole of the main body. A threaded hole that is formed through and is formed in a restrained manner so as to pass through the hole, and a portion of the first central portion opposite to the first groove at the upper peripheral edge of the hole and the hole in the second central portion A portion on the opposite side to the second groove in the peripheral edge of the upper end is cut out to form an inclined surface.

請求項４の発明では請求項３の発明において、抑えは前記ねじ穴が形成された円柱部と、円柱部の上端側の周面から十字形状をなすように突出された突出部とよりなり、本体には前記円柱部が入り込む凹部と、前記突出部が入り込む溝が形成されているものとされる。 In the invention of claim 4, in the invention of claim 3, the restraint is composed of a cylindrical portion in which the screw hole is formed, and a protruding portion protruding so as to form a cross shape from the peripheral surface on the upper end side of the cylindrical portion, The main body is formed with a recess into which the cylindrical portion enters and a groove into which the protruding portion enters.

請求項５の発明によれば、遠心分離機は請求項１及至４記載のいずれかのロータの取付構造を具備するものとされる。 According to the invention of claim 5, the centrifugal separator is provided with the rotor mounting structure according to any one of claims 1 to 4.

この発明によれば、ロータの回転によって生じる遠心力によって第１及び第２の駒が水平移動してシャフトのロータ結合部と接触し、これによりロータとシャフトとが締結され、さらにロータの浮き上がりも防止できるものとなっており、シャフトに対してロータを置くだけで取り付けることができる。 According to the present invention, the first and second pieces move horizontally by the centrifugal force generated by the rotation of the rotor and come into contact with the rotor coupling portion of the shaft, whereby the rotor and the shaft are fastened, and the rotor is also lifted. It can be prevented, and can be installed simply by placing the rotor on the shaft.

また、遠心力によって可動する部材をピンによって回転可能に支持する従来の構造と異なり、ピンは不要であって第１及び第２の駒を駒配置穴に入れるだけでよく、その点で従来に比し組立も簡易に行うことができる。 Further, unlike the conventional structure in which a member movable by centrifugal force is rotatably supported by a pin, the pin is not necessary and only the first and second pieces need to be inserted into the piece arrangement hole. In comparison, assembly can also be performed easily.

この発明によるロータの取付構造の一実施例を示す断面図。Sectional drawing which shows one Example of the attachment structure of the rotor by this invention. 一部断面とした図１の分解斜視図。FIG. 2 is an exploded perspective view of FIG. Ａは図１における取付金具の斜視図、Ｂはその断面図。A is a perspective view of the mounting bracket in FIG. 1, and B is a sectional view thereof. Ａは図２におけるシャフトの一部断面とした正面図、ＢはＡの断面部分の拡大図、Ｃは図２におけるシャフトの一部断面とした斜視図。A is a front view with a partial cross section of the shaft in FIG. 2, B is an enlarged view of the cross section of A, and C is a perspective view with a partial cross section of the shaft in FIG. Ａは図２における本体の平面図、Ｂはその正面図、Ｃはその底面図、Ｄはその側面図、Ｅはその斜視図、Ｆはその断面図。2 is a plan view of the main body in FIG. 2, B is a front view thereof, C is a bottom view thereof, D is a side view thereof, E is a perspective view thereof, and F is a sectional view thereof. Ａは図２における第１の駒の平面図、Ｂはその正面図、Ｃはその底面図、Ｄはその側面図、Ｅはその斜視図、Ｆはその断面図。2A is a plan view of the first piece in FIG. 2, B is a front view thereof, C is a bottom view thereof, D is a side view thereof, E is a perspective view thereof, and F is a sectional view thereof. Ａは図２における第２の駒の平面図、Ｂはその正面図、Ｃはその底面図、Ｄはその側面図、Ｅはその斜視図、Ｆはその断面図。A is a plan view of the second piece in FIG. 2, B is a front view thereof, C is a bottom view thereof, D is a side view thereof, E is a perspective view thereof, and F is a sectional view thereof. Ａは図２における板ばねの平面図、Ｂはその正面図、Ｃはその底面図、Ｄはその斜視図。A is a plan view of the leaf spring in FIG. 2, B is a front view thereof, C is a bottom view thereof, and D is a perspective view thereof. Ａは図２における抑えの平面図、Ｂはその断面図、Ｃはその斜視図。A is a plan view of the restraint in FIG. 2, B is a sectional view thereof, and C is a perspective view thereof. 図３に示した取付金具の組立手順を説明するための図。The figure for demonstrating the assembly procedure of the attachment metal fitting shown in FIG. Ａは取付金具内の第１の駒と第２の駒の位置関係を示す正面図、Ｂはその底面図、Ｃはその断面図、Ｄはその斜視図。A is a front view showing the positional relationship between the first piece and the second piece in the mounting bracket, B is a bottom view thereof, C is a sectional view thereof, and D is a perspective view thereof. 第１の駒と第２の駒に対する板ばねの組込みを説明するための図。The figure for demonstrating incorporation of the leaf | plate spring with respect to a 1st piece and a 2nd piece. Ａ（ａ）は回転停止時における第１及び第２の駒と板ばねの状態を示す平面図、Ａ（ｂ）はその一部断面とした正面図、Ｂ（ａ）は回転時における第１及び第２の駒と板ばねの状態を示す平面図、Ｂ（ｂ）はその一部断面とした平面図。A (a) is a plan view showing the state of the first and second pieces and the leaf spring when rotation is stopped, A (b) is a front view with a partial cross section thereof, and B (a) is the first when rotating. And the top view which shows the state of a 2nd piece and a leaf | plate spring, B (b) is the top view made into the partial cross section. シャフトへのロータの取付けにおいて取付金具がシャフトのロータ結合部に収容される様子を示す図。The figure which shows a mode that a mounting bracket is accommodated in the rotor coupling | bond part of a shaft in the attachment of the rotor to a shaft. Ａは回転停止時における第１及び第２の駒とロータ結合部の関係を示す断面図、Ｂは回転時における第１及び第２の駒とロータ結合部の関係を示す断面図。A is a sectional view showing the relationship between the first and second pieces and the rotor coupling portion when rotation is stopped, and B is a sectional view showing the relationship between the first and second pieces and the rotor coupling portion when rotating. Ａは第１の駒の第１傾斜面と第１シャフト傾斜面とが接触している状態を示す断面図、Ｂは第１の駒の第２傾斜面と第２シャフト傾斜面とが接触している状態を示す断面図。A is a cross-sectional view showing a state where the first inclined surface of the first piece and the first shaft inclined surface are in contact, and B is a contact between the second inclined surface of the first piece and the second shaft inclined surface. Sectional drawing which shows a state. Ａは第１の駒の第１傾斜面と第１シャフト傾斜面とが接触している状態において発生する力を説明するための図、ＢはＡに示した力の釣り合いを示す図。A is a figure for demonstrating the force which generate | occur | produces in the state which the 1st inclined surface and 1st shaft inclined surface of a 1st piece are contacting, B is a figure which shows the balance of the force shown to A. FIG. Ａは第１の駒の第１、第２傾斜面と第１、第２シャフト傾斜面とが接触している状態において発生する力を説明するための図、ＢはＡに示した力の釣り合いを示す図。A is a figure for demonstrating the force which generate | occur | produces in the state which the 1st, 2nd inclined surface of the 1st piece and the 1st, 2nd shaft inclined surface are contacting, B is the balance of the force shown to A. FIG. 第１及び第２の駒が戻らず、シャフトとロータがロック状態になった時の解除を説明するための図。The figure for demonstrating cancellation | release when the 1st and 2nd piece does not return and a shaft and a rotor will be in a locked state. シャフトとロータ穴とが、固着した時の解除を説明するための図。The figure for demonstrating cancellation | release when a shaft and a rotor hole adhere. 板ばねの比較例を示す図。The figure which shows the comparative example of a leaf | plate spring. 取付金具の比較例を示す図。The figure which shows the comparative example of a mounting bracket. 従来のロータの取付構造を示す断面図。Sectional drawing which shows the attachment structure of the conventional rotor.

この発明の実施形態を図面を参照して実施例により説明する。 Embodiments of the present invention will be described with reference to the drawings.

図１はこの発明によるロータの取付構造の一実施例を具備する遠心分離機の内部構成を示したものであり、図１中、３０はモータの駆動軸（図示せず）に取り付けられたシャフトを示し、４０はシャフト３０に取り付けられたロータを示す。また、５０はロータ４０に取り付けられている取付金具を示す。 FIG. 1 shows the internal structure of a centrifuge having an embodiment of a rotor mounting structure according to the present invention. In FIG. 1, reference numeral 30 denotes a shaft attached to a drive shaft (not shown) of a motor. Reference numeral 40 denotes a rotor attached to the shaft 30. Reference numeral 50 denotes a mounting bracket attached to the rotor 40.

図２は図１に示した構成を各部に分解して示したものであり、取付金具５０は図２に示したように、本体６０と第１の駒７０と第２の駒８０と板ばね９０と抑え１００とによって構成されている。図３は本体６０に第１及び第２の駒７０，８０、板ばね９０及び抑え１００が組み込まれて構成された取付金具５０を示したものである。 FIG. 2 is an exploded view of the configuration shown in FIG. 1, and the mounting bracket 50 includes a main body 60, a first piece 70, a second piece 80, and a leaf spring, as shown in FIG. 90 and a restraint 100. FIG. 3 shows a mounting bracket 50 constructed by incorporating the first and second pieces 70 and 80, the leaf spring 90 and the holding member 100 into the main body 60.

まず、最初に、シャフト３０及び取付金具５０の各部の構成について図４〜９を参照して説明する。 First, the structure of each part of the shaft 30 and the mounting bracket 50 will be described with reference to FIGS.

シャフト３０は図４に示したように大径部３１と小径部３２とそれら大径部３１と小径部３２とをつなぐテーパ部３３とよりなり、小径部３２の先端側は円筒形状をなすロータ結合部３４とされている。ロータ結合部３４の内周面には環状凹部３５が形成されており、環状凹部３５より先端側には環状凹部３５の底面３５ａより突出する環状凸部３６が構成されている。環状凸部３６の内周面の環状凹部３５側の角部には面取りが施されて第１シャフト傾斜面３６ａが形成されている。また、第１シャフト傾斜面３６ａから環状凹部３５の底面３５ａに至る面は底面３５ａと鋭角をなす第２シャフト傾斜面３６ｂとされている。 As shown in FIG. 4, the shaft 30 includes a large-diameter portion 31, a small-diameter portion 32, and a tapered portion 33 that connects the large-diameter portion 31 and the small-diameter portion 32, and the tip end side of the small-diameter portion 32 has a cylindrical shape. The coupling portion 34 is used. An annular concave portion 35 is formed on the inner peripheral surface of the rotor coupling portion 34, and an annular convex portion 36 that protrudes from the bottom surface 35 a of the annular concave portion 35 is formed on the tip side of the annular concave portion 35. A corner of the inner peripheral surface of the annular convex portion 36 on the annular concave portion 35 side is chamfered to form a first shaft inclined surface 36a. A surface from the first shaft inclined surface 36a to the bottom surface 35a of the annular recess 35 is a second shaft inclined surface 36b that forms an acute angle with the bottom surface 35a.

ロータ結合部３４の内部底面３４ａには駆動ピン３７が突設されている。駆動ピン３７はこの例では円周上に等角間隔で３本設けられており、各駆動ピン３７の先端は先細形状とされている。なお、内部底面３４ａの中央にはシャフト３０をモータの駆動軸にボルト固定するために用いる円形の穴３８が形成されている。 A drive pin 37 projects from the inner bottom surface 34 a of the rotor coupling portion 34. In this example, three drive pins 37 are provided at equiangular intervals on the circumference, and the tip of each drive pin 37 is tapered. A circular hole 38 is formed in the center of the inner bottom surface 34a for use in bolting the shaft 30 to the drive shaft of the motor.

取付金具５０の本体６０は図５に示したような形状を有し、大別して円柱部６１と円柱部６１の上端側に位置するフランジ部６２と、円柱部６１の下端側に位置する駆動ピン接触部６３とよりなる。 The main body 60 of the mounting bracket 50 has a shape as shown in FIG. 5, and is roughly divided into a cylindrical portion 61, a flange portion 62 located on the upper end side of the cylindrical portion 61, and a drive pin located on the lower end side of the cylindrical portion 61. The contact portion 63 is included.

円柱部６１にはその軸心と直交する方向に大きな駒配置穴６４が貫通形成されている。駒配置穴６４は角穴形状とされている。駒配置穴６４の上方には駒配置穴６４と連通し、円柱部６１及びフランジ部６２を通って上方に開口する開口６５が形成されている。開口６５は角が丸まった矩形形状とされている。 A large piece arrangement hole 64 is formed through the cylindrical portion 61 in a direction perpendicular to the axis. The piece arrangement hole 64 has a square hole shape. An opening 65 is formed above the piece placement hole 64 so as to communicate with the piece placement hole 64 and open upward through the cylindrical portion 61 and the flange portion 62. The opening 65 has a rectangular shape with rounded corners.

フランジ部６２の上面において開口６５の互いに対向する長辺部分の各外側には凹部６６が円弧状に切り欠かれて形成されている。２つの凹部６６の円弧状の外形は同一円周上に位置し、この円周を横切るように開口６５が形成されている。フランジ部６２の上面にはさらに溝６７が十字形状をなすように形成されている。溝６７は開口６５の一対の短辺部分及び２つの凹部６６からそれぞれフランジ部６２の外周面まで形成されている。溝６７の深さは凹部６６の深さより浅くされている。さらに、フランジ部６２にはねじ穴６８ａが４つ形成されており、円柱部６１の軸心位置において駒配置穴６４の下方には円形の穴６８ｂが貫通形成されている。 On the outer surface of the long side portion of the opening 65 facing each other on the upper surface of the flange portion 62, a recess 66 is formed by cutting out in an arc shape. The arcuate outer shapes of the two recesses 66 are located on the same circumference, and an opening 65 is formed so as to cross the circumference. A groove 67 is further formed on the upper surface of the flange portion 62 so as to form a cross shape. The groove 67 is formed from the pair of short side portions of the opening 65 and the two concave portions 66 to the outer peripheral surface of the flange portion 62. The depth of the groove 67 is shallower than the depth of the recess 66. Furthermore, four screw holes 68 a are formed in the flange portion 62, and a circular hole 68 b is formed below the piece arrangement hole 64 at the axial center position of the cylindrical portion 61.

駆動ピン接触部６３はこの例では穴６８ｂを中心として等角間隔で放射状に配置された６つの角柱６９によって構成されている。角柱６９は円柱部６１の下面から突出形成されており、その先端は先鋭形状をなすものとされている。 In this example, the drive pin contact portion 63 is constituted by six prisms 69 arranged radially at equiangular intervals around the hole 68b. The prism 69 is formed so as to protrude from the lower surface of the cylindrical portion 61, and the tip thereof has a sharp shape.

第１の駒７０は図６に示したような形状を有するものとされ、中央部７１と、中央部７１の一方の側方に位置する側壁部７２とを有し、中央部７１と側壁部７２との間には溝７３が設けられている。中央部７１と側壁部７２は溝７３の下方に位置する連結部７４によって連結されている。 The first piece 70 has a shape as shown in FIG. 6, and includes a central portion 71 and a side wall portion 72 located on one side of the central portion 71, and the central portion 71 and the side wall portion A groove 73 is provided between the first and second grooves 72. The central portion 71 and the side wall portion 72 are connected by a connecting portion 74 located below the groove 73.

中央部７１の溝７３側の側面７１ａはくの字形状をなし、このくの字形状をなす側面７１ａ側の幅に対し、反対側の中央部７１の幅は狭められ、駒７０の底面７０ａの形状は略凸形状をなすものとされている。中央部７１には上下方向に円形の穴７５が貫通形成されており、穴７５の上端周縁における溝７３と反対側の部分は切り欠かれて傾斜面７６が形成されている。 The side surface 71a of the central portion 71 on the groove 73 side has a square shape, and the width of the central portion 71 on the opposite side is made narrower than the width of the side surface 71a forming the rectangular shape, and the bottom surface 70a of the piece 70 is formed. The shape is assumed to be substantially convex. A circular hole 75 is formed in the central portion 71 so as to penetrate in the vertical direction, and an inclined surface 76 is formed by cutting away a portion of the upper end periphery of the hole 75 opposite to the groove 73.

側壁部７２は中央部７１より高く、その外側面７２ａは円弧形状をなすものとされている。側壁部７２の上端は外側面７２ａ側（外周側）から順に、外側面７２ａの円弧形状とそれぞれ同心の円弧形状をなす第２傾斜面７２ｂ、第１傾斜面７２ｃ及び水平面７２ｄによって構成されており、第１傾斜面７２ｃと第２傾斜面７２ｂとがなす形状はシャフト３０の第１シャフト傾斜面３６ａと第２シャフト傾斜面３６ｂとがなす形状と対応する形状とされており、つまり第１傾斜面７２ｃ及び第２傾斜面７２ｂの各傾斜角度は第１シャフト傾斜面３６ａ及び第２シャフト傾斜面３６ｂの各傾斜角度と一致されている。上記のような形状を有する駒７０の重心位置は穴７５の中心軸より側壁部７２に寄った位置にある。 The side wall portion 72 is higher than the central portion 71, and the outer side surface 72a has an arc shape. The upper end of the side wall portion 72 is composed of a second inclined surface 72b, a first inclined surface 72c, and a horizontal plane 72d that are concentric with the arc shape of the outer surface 72a in order from the outer surface 72a side (outer peripheral side). The shape formed by the first inclined surface 72c and the second inclined surface 72b is a shape corresponding to the shape formed by the first shaft inclined surface 36a and the second shaft inclined surface 36b of the shaft 30, that is, the first inclined surface. The inclination angles of the surface 72c and the second inclined surface 72b are the same as the inclination angles of the first shaft inclined surface 36a and the second shaft inclined surface 36b. The center of gravity of the piece 70 having the shape as described above is located closer to the side wall 72 than the central axis of the hole 75.

第２の駒８０は図７に示したような形状を有するものとされ、中央部８１と、中央部８１の一方の側方に位置する側壁部８２とを有し、中央部８１と側壁部８２との間には溝８３が設けられている。側壁部８２の外側面８２ａは円弧形状をなすものとされており、駒８０の底面８０ａは側壁部８２がＵ字の中間部をなすＵ字形状とされている。Ｕ字の両脚部は外壁部８４，８５によって構成されており、中央部８１はこれら外壁部８４，８５上に位置し、外壁部８４，８５と溝８３の下方に位置する連結部８６とによって支持されて底面８０ａから浮いた状態となっている。駒８０はこのようなＵ字形状の底面８０ａを有することにより、独立して立つことができるものとなっている。 The second piece 80 has a shape as shown in FIG. 7, and includes a central portion 81 and a side wall portion 82 located on one side of the central portion 81. The central portion 81 and the side wall portion A groove 83 is provided between the two. The outer side surface 82a of the side wall portion 82 has an arc shape, and the bottom surface 80a of the piece 80 has a U shape in which the side wall portion 82 forms an intermediate portion of the U shape. Both U-shaped leg portions are constituted by outer wall portions 84 and 85, and a central portion 81 is located on the outer wall portions 84 and 85, and is formed by the outer wall portions 84 and 85 and a connecting portion 86 located below the groove 83. It is supported and floated from the bottom surface 80a. The piece 80 can stand independently by having such a U-shaped bottom face 80a.

中央部８１の溝８３側の側面８１ａ及び反対側の側面８１ｂは共に駒７０の中央部７１の側面７１ａと同様、くの字形状とされている。中央部８１には上下方向に円形の穴８７が貫通形成されており、穴８７の上端周縁における溝８３と反対側の部分は切り欠かれて傾斜面８８が形成されている。 Both the side surface 81 a on the groove 83 side and the side surface 81 b on the opposite side of the central portion 81 are formed in a dogleg shape, like the side surface 71 a of the central portion 71 of the piece 70. A circular hole 87 is formed through the central portion 81 in the vertical direction, and an inclined surface 88 is formed by cutting away a portion of the upper end periphery of the hole 87 opposite to the groove 83.

側壁部８２の上端は外側面８２ａ側（外周側）から順に、外側面８２ａの円弧形状とそれぞれ同心の円弧形状をなす第２傾斜面８２ｂ，第１傾斜面８２ｃ及び水平面８２ｄによって構成されており、これら水平面８２ｄ、第１傾斜面８２ｃ及び第２傾斜面８２ｂの形状は駒７０の側壁部７２の水平面７２ｄ、第１傾斜面７２ｃ及び第２傾斜面７２ｂと同一形状とされている。なお、水平面８２ｄは中央部８１の上面と高さ位置が一致されている。駒８０の重心位置は穴８７の中心軸より側壁部８２に寄った位置にある。 The upper end of the side wall portion 82 is composed of a second inclined surface 82b, a first inclined surface 82c, and a horizontal plane 82d that are concentric with the arc shape of the outer surface 82a in this order from the outer surface 82a side (outer peripheral side). The shapes of the horizontal surface 82d, the first inclined surface 82c, and the second inclined surface 82b are the same as the horizontal surface 72d, the first inclined surface 72c, and the second inclined surface 72b of the side wall portion 72 of the piece 70. Note that the horizontal plane 82d has the same height as the top surface of the central portion 81. The center of gravity of the piece 80 is located closer to the side wall 82 than the central axis of the hole 87.

板ばね９０は図８に示したような形状とされ、略楕円形状をなす基部９１と、基部９１の両端から同一方向に９０度折り曲げられて形成された長短２つの延長部９２，９３と、各延長部９２，９３の先端から延長部９２，９３の幅方向に延長されて形成された２つの腕部９４，９５とよりなる。基部９１の中央には円形の穴９６が形成されている。２つの腕部９４，９５は互いに穴９６の中心軸を囲むように円弧状をなすように形成されており、２つの腕部９４，９５の幅、長さは等しくされ、また図８Ａに示した穴９６の中心軸からの距離Ｌ１，Ｌ２も等しくされている。 The leaf spring 90 has a shape as shown in FIG. 8, a base portion 91 having a substantially elliptical shape, and two long and short extensions 92 and 93 formed by being bent 90 degrees in the same direction from both ends of the base portion 91. It consists of two arm portions 94 and 95 formed by extending in the width direction of the extension portions 92 and 93 from the tips of the extension portions 92 and 93. A circular hole 96 is formed in the center of the base 91. The two arm portions 94 and 95 are formed in an arc shape so as to surround the central axis of the hole 96, and the width and length of the two arm portions 94 and 95 are equal, and are shown in FIG. 8A. The distances L1 and L2 from the center axis of the hole 96 are also made equal.

抑え１００は図９に示したような形状とされ、円柱部１０１と、円柱部１０１の上端側の周面から十字形状をなすように突出された４本の突出部１０２とよりなる。円柱部１０１の中央にはねじ穴１０３が形成されている。 The restraint 100 has a shape as shown in FIG. 9 and includes a cylindrical portion 101 and four projecting portions 102 that project from the peripheral surface on the upper end side of the cylindrical portion 101 so as to form a cross shape. A screw hole 103 is formed at the center of the cylindrical portion 101.

図１０は取付金具５０を構成する各部の組立てを示したものであり、駒７０と駒８０は本体６０の駒配置穴６４に挿入されて配置される。板ばね９０は開口６５を介して延長部９２，９３及び腕部９４，９５が駒配置穴６４に挿入され、基部９１は本体６０の凹部６６に入れ込まれる。最後に、抑え１００が本体６０上に搭載される。抑え１００の円柱部１０１は凹部６６に入れ込まれ、十字形状をなす突出部１０２は本体６０の溝６７に入れ込まれる。駒７０，８０、板ばね９０及び抑え１００はこのようにして本体６０に組み込まれ、取付金具５０が完成する。 FIG. 10 shows the assembly of each part constituting the mounting bracket 50, and the piece 70 and the piece 80 are inserted and arranged in the piece arrangement hole 64 of the main body 60. In the leaf spring 90, the extension portions 92 and 93 and the arm portions 94 and 95 are inserted into the piece arrangement hole 64 through the opening 65, and the base portion 91 is inserted into the recess 66 of the main body 60. Finally, the restraint 100 is mounted on the main body 60. The cylindrical portion 101 of the holding member 100 is inserted into the recess 66, and the projecting portion 102 having a cross shape is inserted into the groove 67 of the main body 60. The pieces 70 and 80, the leaf spring 90, and the holding member 100 are assembled in the main body 60 in this way, and the mounting bracket 50 is completed.

図１１は本体６０に組み込まれた駒７０と駒８０の関係を示したものであり、駒８０の中央部８１は駒７０の中央部７１上に位置して重なった状態となり、駒７０の側壁部７２と駒８０の側壁部８２は中央部７１，８１が重なった部分に対し、互いに反対側に位置される。また、駒７０の略凸形状をなす底面７０ａの凸部分（中央部７１の一部）は駒８０のＵ字形状をなす底面８０ａのＵ字内に入り込んだ状態となる。図１１に示したように駒７０と駒８０は高さが等しくされている。 FIG. 11 shows the relationship between the piece 70 and the piece 80 incorporated in the main body 60, and the central portion 81 of the piece 80 is located on and overlapped with the central portion 71 of the piece 70. The portion 72 and the side wall portion 82 of the piece 80 are located on the opposite sides with respect to the portion where the central portions 71 and 81 overlap. Further, the convex portion (a part of the central portion 71) of the bottom surface 70a having a substantially convex shape of the piece 70 enters a U-shape of the bottom surface 80a of the U-shape of the piece 80. As shown in FIG. 11, the pieces 70 and 80 have the same height.

図１２は板ばね９０が組み込まれる様子を示したものであり、板ばね９０の長い方の延長部９２に形成されている腕部９４は駒７０の溝７３に差し込まれ、短い方の延長部９３に形成されている腕部９５は駒８０の溝８３に差し込まれる。 FIG. 12 shows a state in which the leaf spring 90 is assembled. The arm portion 94 formed on the longer extension portion 92 of the leaf spring 90 is inserted into the groove 73 of the piece 70 and the shorter extension portion. 93 is inserted into the groove 83 of the piece 80.

図１３Ａは駒７０，８０と板ばね９０の関係を示したものであり、板ばね９０の基部９１は一部破断して示している。腕部９４，９５はそれぞれ駒７０の中央部７１の側面７１ａ及び駒８０の中央部８１の側面８１ａに当接しており、駒７０及び駒８０は腕部９４及び９５によってそれぞれ位置決めされ、即ち本体６０の駒配置穴６４内の所定の位置に腕部９４，９５によって保持されている。 FIG. 13A shows the relationship between the pieces 70 and 80 and the leaf spring 90, and the base 91 of the leaf spring 90 is partially broken. The arm portions 94 and 95 are in contact with the side surface 71a of the central portion 71 of the piece 70 and the side surface 81a of the central portion 81 of the piece 80, respectively, and the piece 70 and the piece 80 are positioned by the arm portions 94 and 95, that is, the main body. The arm portions 94 and 95 hold the predetermined positions in the 60 piece arrangement holes 64.

取付金具５０はロータ４０に取り付けられる。ロータ４０は図１，２に示したようにシャフト３０が挿入されるロータ穴４１を有しており、このロータ穴４１内に取付金具５０が取り付けられる。取り付けは４本のボルト１１０（図２参照）を使用して行われ、ロータ穴４１の底面４１ａに形成された穴４２を挿通して４本のボルト１１０が取付金具５０の本体６０に形成されているねじ穴６８ａにねじ込まれることにより取付金具５０はロータ穴４１の底面４１ａにねじ止め固定される。 The mounting bracket 50 is attached to the rotor 40. As shown in FIGS. 1 and 2, the rotor 40 has a rotor hole 41 into which the shaft 30 is inserted, and a mounting bracket 50 is attached in the rotor hole 41. The mounting is performed using four bolts 110 (see FIG. 2), and the four bolts 110 are formed in the main body 60 of the mounting bracket 50 through the holes 42 formed in the bottom surface 41a of the rotor hole 41. The mounting bracket 50 is screwed and fixed to the bottom surface 41a of the rotor hole 41 by being screwed into the screw hole 68a.

板ばね９０の基部９１及び抑え１００はこのように本体６０がロータ穴４１の底面４１ａにねじ止め固定されることにより、ロータ穴４１の底面４１ａと本体６０とによって挟み込まれて固定される。なお、取付金具５０がロータ４０に取り付けられた状態で、板ばね９０の基部９１、駒７０の中央部７１、駒８０の中央部８１及び本体６０にそれぞれ形成されている穴９６，７５，８７，６８ｂはロータ４０の回転中心軸４３上に位置し、抑え１００のねじ穴１０３も回転中心軸４３上に位置する。ロータ穴４１の底面４１ａには円形の穴４４が回転中心軸４３上に位置して形成されている。 The base portion 91 and the restraint 100 of the leaf spring 90 are sandwiched and fixed between the bottom surface 41a of the rotor hole 41 and the main body 60 by fixing the main body 60 to the bottom surface 41a of the rotor hole 41 in this way. The holes 96, 75, 87 formed in the base 91 of the leaf spring 90, the center 71 of the piece 70, the center 81 of the piece 80, and the main body 60 in a state where the mounting bracket 50 is attached to the rotor 40, respectively. 68b are located on the rotation center axis 43 of the rotor 40, and the screw hole 103 of the retainer 100 is also located on the rotation center axis 43. A circular hole 44 is formed on the bottom surface 41 a of the rotor hole 41 so as to be positioned on the rotation center shaft 43.

取付金具５０を備えたロータ４０は図１に示したようにシャフト３０に取り付けられる。ロータ４０はこの例ではアングルロータとされており、試料が入った容器を収容保持する複数の容器穴４５を備えている。ロータ穴４１はシャフト３０の小径部３２及びテーパ部３３に合致する形状とされており、開口側（下端側）は開口に向かって徐々に拡径するテーパ面４１ｂによって構成されている。シャフト３０のテーパ部３３はロータ４０を保持する保持面とされ、テーパ部３３上にテーパ面４１ｂが搭載されてシャフト３０にロータ４０が取り付けられる。 The rotor 40 provided with the mounting bracket 50 is attached to the shaft 30 as shown in FIG. In this example, the rotor 40 is an angle rotor and includes a plurality of container holes 45 for accommodating and holding a container containing a sample. The rotor hole 41 has a shape that matches the small-diameter portion 32 and the tapered portion 33 of the shaft 30, and the opening side (lower end side) is formed by a tapered surface 41 b that gradually increases in diameter toward the opening. The tapered portion 33 of the shaft 30 is a holding surface that holds the rotor 40, and the tapered surface 41 b is mounted on the tapered portion 33 so that the rotor 40 is attached to the shaft 30.

図１４はこのシャフト３０へのロータ４０の取付けにおいて、ロータ４０に取り付けられている取付金具５０がシャフト３０のロータ結合部３４に挿入、収容される様子を示したものであり、取付金具５０の本体６０の下部に形成されている６つの角柱６９は先鋭形状を有し、ロータ結合部３４に突設されている３本の駆動ピン３７は先細形状とされているため、角柱６９と駆動ピン３７が図１４Ｂに示したように当たっても角柱６９は駆動ピン３７間に図１４Ｃに示したように誘い込まれる。これにより図１４Ｄ，Ｅに示したように３本の駆動ピン３７は隣接する角柱６９間に１つおきに配置された状態となり、駆動ピン３７と角柱６９の胴部同士が互いに接触する。シャフト３０が回転すると、角柱６９は駆動ピン３７から動力を受け、これによりロータ４０を回転させることができる。 FIG. 14 shows how the mounting bracket 50 attached to the rotor 40 is inserted into and accommodated in the rotor coupling portion 34 of the shaft 30 when the rotor 40 is mounted on the shaft 30. The six prisms 69 formed in the lower part of the main body 60 have a sharp shape, and the three drive pins 37 projecting from the rotor coupling portion 34 have a tapered shape. Even if 37 hits as shown in FIG. 14B, the prism 69 is drawn between the drive pins 37 as shown in FIG. 14C. As a result, as shown in FIGS. 14D and 14E, the three drive pins 37 are arranged alternately between adjacent prisms 69, and the body portions of the drive pins 37 and the prisms 69 are in contact with each other. When the shaft 30 rotates, the prism 69 receives power from the drive pin 37, whereby the rotor 40 can be rotated.

ロータ４０の回転停止状態では駒７０，８０は本体６０の駒配置穴６４内に位置し、図１５Ａに示したように駒７０，８０とシャフト３０の環状凸部３６とは離隔した状態となっている。シャフト３０の回転によりロータ４０が回転すると、駒７０，８０は遠心力により板ばね９０のばね力に抗して駒配置穴６４内を互いに反対方向に移動し、駒７０，８０は駒配置穴６４の一端及び他端から図１５Ｂに示したように突出する。そして、駒７０，８０の各第１傾斜面７２ｃ，８２ｃはシャフト３０の環状凸部３６の第１シャフト傾斜面３６ａと当接する。このように駒７０，８０の第１傾斜面７２ｃ，８２ｃが第１シャフト傾斜面３６ａと接触することで、ロータ４０とシャフト３０との締結力を発生させる。図１３Ｂはこの時の駒７０，８０と板ばね９０の関係を示しており、板ばね９０の腕部９４，９５は大きく開いた状態となる。 When the rotation of the rotor 40 is stopped, the pieces 70 and 80 are positioned in the piece arrangement hole 64 of the main body 60, and the pieces 70 and 80 and the annular convex portion 36 of the shaft 30 are separated as shown in FIG. 15A. ing. When the rotor 40 is rotated by the rotation of the shaft 30, the pieces 70 and 80 move in the opposite directions in the piece arrangement hole 64 against the spring force of the leaf spring 90 by centrifugal force, and the pieces 70 and 80 are moved to the piece arrangement hole. 64 protrudes from one end and the other end of 64 as shown in FIG. 15B. The first inclined surfaces 72 c and 82 c of the pieces 70 and 80 are in contact with the first shaft inclined surface 36 a of the annular convex portion 36 of the shaft 30. In this way, the first inclined surfaces 72c and 82c of the pieces 70 and 80 are brought into contact with the first shaft inclined surface 36a, thereby generating a fastening force between the rotor 40 and the shaft 30. FIG. 13B shows the relationship between the pieces 70 and 80 and the leaf spring 90 at this time, and the arm portions 94 and 95 of the leaf spring 90 are in a state of being largely opened.

図１６Ａ，Ｂは駒７０，８０とシャフト３０の環状凸部３６との接触状態の２つの態様を駒７０側について示したものであり、図１６Ａは駒７０の第１傾斜面７２ｃが第１シャフト傾斜面３６ａに押し付けられて接触している状態を示し、図１６Ｂは駒７０の第１傾斜面７２ｃ、第２傾斜面７２ｂがそれぞれ第１シャフト傾斜面３６ａ、第２シャフト傾斜面３６ｂに接触している状態を示す。図１６Ｂは振動等によって図１６Ａの接触状態によるロータ４０とシャフト３０の締結力を超える浮上力がロータ４０に発生した場合であり、ロータ４０にこのような浮上力が発生した場合、駒７０，８０の第２傾斜面７２ｂ，８２ｂと第２シャフト傾斜面３６ｂとが接触することで、ロータ４０の浮き上がりを阻止でき、つまり、ロータ４０がある一定距離以上、浮かないようになっている。なお、駒７０，８０は前述したように、接触部を構成する第１傾斜面７２ｃと８２ｃ、第２傾斜面７２ｂと８２ｂがそれぞれ同一形状とされているため、第１シャフト傾斜面３６ａ及び第２シャフト傾斜面３６ｂとの各接触圧は等しくなっている。 16A and 16B show two aspects of the contact state between the pieces 70 and 80 and the annular convex portion 36 of the shaft 30 on the piece 70 side. FIG. 16A shows that the first inclined surface 72c of the piece 70 is the first. FIG. 16B shows a state where the first inclined surface 72c and the second inclined surface 72b of the piece 70 are in contact with the first inclined shaft surface 36a and the second inclined shaft surface 36b, respectively. Indicates the state of FIG. 16B shows a case where a floating force exceeding the fastening force between the rotor 40 and the shaft 30 due to the contact state of FIG. 16A is generated in the rotor 40 due to vibration or the like, and when such a floating force is generated in the rotor 40, The 80 second inclined surfaces 72b and 82b and the second shaft inclined surface 36b are in contact with each other, so that the rotor 40 can be prevented from being lifted, that is, the rotor 40 is prevented from floating more than a certain distance. As described above, since the first inclined surfaces 72c and 82c and the second inclined surfaces 72b and 82b constituting the contact portion have the same shape in the pieces 70 and 80, respectively, the first shaft inclined surface 36a and the first inclined surface 36a Each contact pressure with the 2-shaft inclined surface 36b is equal.

図１７は図１６Ａに示した状態において発生している力を示したものであり、遠心力に起因して駒７０が受ける力Ｆ１と、第１シャフト傾斜面３６ａからその法線方向に沿って駒７０が受ける力Ｆ３と、本体６０の駒配置穴６４を構成する面からその法線方向に沿って駒７０が受ける力Ｆ２とが釣り合っている。よって、シャフト３０とロータ４０が締結された状態となる。なお、駒７０の第１傾斜面７２ｃが鉛直方向となす角度θ１は２０度以上７０度以下であればよく、好ましくは３０度以上６０度以下とされ、より好ましくは４０度以上５０度以下とされる。駒８０の第１傾斜面８２ｃの角度も同様である。 FIG. 17 shows the force generated in the state shown in FIG. 16A. The force F1 received by the piece 70 due to the centrifugal force and the normal direction from the first shaft inclined surface 36a. The force F3 received by the piece 70 and the force F2 received by the piece 70 along the normal direction from the surface constituting the piece arrangement hole 64 of the main body 60 are balanced. Thus, the shaft 30 and the rotor 40 are in a fastened state. The angle θ1 formed by the first inclined surface 72c of the piece 70 with respect to the vertical direction may be 20 degrees or more and 70 degrees or less, preferably 30 degrees or more and 60 degrees or less, and more preferably 40 degrees or more and 50 degrees or less. Is done. The same applies to the angle of the first inclined surface 82c of the piece 80.

図１８は図１６Ｂに示した状態において発生している力を示したものであり、遠心力に起因して駒７０が受ける力Ｆ４と、本体６０の駒配置穴６４を構成する面からその法線方向に沿って駒７０が受ける力Ｆ５と、第２シャフト傾斜面３６ｂからその法線方向に沿って駒７０が受ける力Ｆ６と、第１シャフト傾斜面３６ａからその法線方向に沿って駒７０が受ける力Ｆ７とが釣り合ってる。よってロータ４０が浮上することはない。なお、駒７０の第２傾斜面７２ｂが鉛直方向となす角度θ２は９０度以下であればよい。 FIG. 18 shows the force generated in the state shown in FIG. 16B. The method is based on the force F4 received by the piece 70 due to the centrifugal force and the surface constituting the piece arrangement hole 64 of the main body 60. A force F5 received by the piece 70 along the linear direction, a force F6 received by the piece 70 along the normal direction from the second shaft inclined surface 36b, and a piece along the normal direction from the first shaft inclined surface 36a The force F7 that 70 receives is balanced. Therefore, the rotor 40 does not float up. The angle θ2 formed by the second inclined surface 72b of the piece 70 with respect to the vertical direction may be 90 degrees or less.

ロータ４０の回転が停止すると、遠心力がなくなり、板ばね９０の腕部９４，９５は弾性復帰力により図１３Ｂに示した状態から図１３Ａに示した初期状態に復帰する。これにより、駒７０，８０は初期位置に戻り、つまり駒配置穴６４内に収容される。 When the rotation of the rotor 40 stops, the centrifugal force disappears, and the arm portions 94 and 95 of the leaf spring 90 return to the initial state shown in FIG. 13A from the state shown in FIG. 13B by the elastic return force. Thereby, the pieces 70 and 80 return to the initial positions, that is, are accommodated in the piece arrangement holes 64.

ところで、ロータ４０の回転が停止したにもかかわらず、駒７０，８０が初期位置に戻らず、例えば図１６Ｂに示したように、第２シャフト傾斜面３６ｂと接触したままのロック状態となることがある。このようなロック状態は例えば漏れた試料等で駒７０，８０がシャフト３０に付着してしまったり、あるいは板ばね９０の破損等によって生じうる。 By the way, although the rotation of the rotor 40 is stopped, the pieces 70 and 80 do not return to the initial positions, and, for example, as shown in FIG. 16B, the locked state remains in contact with the second shaft inclined surface 36b. There is. Such a locked state may occur, for example, when the pieces 70 and 80 adhere to the shaft 30 due to a leaked sample or the like, or the leaf spring 90 is damaged.

この例ではこのようなロック状態が生じても容易に解除することができる。図１９はこの様子を示したものであり、駒７０，８０を駒配置穴６４内の初期位置に戻すために工具１２０を使用する。工具１２０は把持部１２１と軸部１２２とよりなり、この例では軸部１２２にはねじ１２２ａが形成されている。また、軸部１２２の先端は先細形状とされている。 In this example, even if such a locked state occurs, it can be easily released. FIG. 19 shows this state, and the tool 120 is used to return the pieces 70 and 80 to the initial position in the piece arrangement hole 64. The tool 120 includes a grip part 121 and a shaft part 122. In this example, a screw 122a is formed on the shaft part 122. Further, the tip of the shaft portion 122 is tapered.

図１９Ａに示したように、ロータ４０の穴４４に工具１２０の軸部１２２を差し込み、工具１２０を回して抑え１００のねじ穴１０３へ軸部１２２をねじ込んでいくと、軸部１２２の先端は図１９Ｂに示したように駒８０の穴８７の周縁の傾斜面８８を押すようになり、これにより駒８０を回転中心軸４３側に移動させることができる。さらに、軸部１２２を差し込んでいくと、軸部１２２の先端は図１９Ｃに示したように駒７０の穴７５の周縁の傾斜面７６を押すようになり、駒８０と同様、駒７０を回転中心軸４３側に移動させることができる。これにより、図１９Ｄに示した状態となってシャフト３０とロータ４０のロック状態を解除することができ、シャフト３０からロータ４０を取り外すことができる。軸部１２２の先端は先細形状とされ、また駒８０，７０は穴８７，７５に軸部１２２を誘い込むための傾斜面８８，７６がそれぞれ形成されているため、軸部１２２は容易に穴８７，７５に誘い込まれる。このように、この例では工具１２０を差し込む一動作で２つの駒７０，８０を移動させ、ロック状態を解除することができる。 As shown in FIG. 19A, when the shaft portion 122 of the tool 120 is inserted into the hole 44 of the rotor 40 and the tool 120 is turned to screw the shaft portion 122 into the screw hole 103 of the holding member 100, the tip of the shaft portion 122 is As shown in FIG. 19B, the inclined surface 88 on the peripheral edge of the hole 87 of the piece 80 is pushed, whereby the piece 80 can be moved to the rotation center axis 43 side. Further, when the shaft part 122 is inserted, the tip of the shaft part 122 pushes the inclined surface 76 at the periphery of the hole 75 of the piece 70 as shown in FIG. It can be moved to the center axis 43 side. Accordingly, the shaft 30 and the rotor 40 can be unlocked as shown in FIG. 19D, and the rotor 40 can be detached from the shaft 30. The front end of the shaft portion 122 is tapered, and the pieces 80 and 70 are formed with inclined surfaces 88 and 76 for drawing the shaft portion 122 into the holes 87 and 75, respectively. , 75. In this way, in this example, the two pieces 70 and 80 can be moved by one operation of inserting the tool 120 to release the locked state.

一方、図２０はロータ穴４１のテーパ面４１ｂと、ロータ４０を保持する保持面を構成するシャフト３０のテーパ部３３とが例えば固着してしまった場合の解除を示したものである。工具１２０を上述したロック解除の場合と同様、回してねじ込んでいくと、シャフト３０をモータの駆動軸に止めるボルト１３０に軸部１２２の先端が当たり、さらに工具１２０を回し、軸部１２２をボルト１３０に押し付けていくことにより、図２０Ａに示したようにロータ４０を浮き上がらせることができ、よって固着を解除することができる。なお、工具１２０のねじ１２２ａはロータ４０に取り付けられている取付金具５０の抑え１００のねじ穴１０３と螺合しているため、工具１２０を持ち上げることで図２０Ｂに示したようにロータ４０を持ち上げることができる。 On the other hand, FIG. 20 shows the release when the tapered surface 41b of the rotor hole 41 and the tapered portion 33 of the shaft 30 constituting the holding surface for holding the rotor 40 are fixed, for example. As in the case of the unlocking described above, when the tool 120 is turned and screwed in, the tip of the shaft portion 122 hits the bolt 130 that holds the shaft 30 on the drive shaft of the motor, and the tool 120 is further turned to tighten the shaft portion 122 to the bolt. By pressing against the rotor 130, the rotor 40 can be lifted as shown in FIG. 20A, and the sticking can be released. Since the screw 122a of the tool 120 is screwed into the screw hole 103 of the holding member 100 attached to the rotor 40, the tool 40 is lifted to lift the rotor 40 as shown in FIG. 20B. be able to.

以上、この発明の実施例について説明したが、上述した実施例によれば以下のような効果を得ることができる。
（１）ロータ４０の回転によって生じる遠心力によって駒７０，８０が水平移動して、ロータ４０とシャフト３０が締結されるため、シャフト３０に対してロータ４０は置くだけでよい。
（２）遠心力を利用する図２３に示した従来の構造では、遠心力によって可動する雄型部材９−１，９−２はピン（回転軸１１−１，１１−２）によって支持されており、このようなピンを用いる構造は組立作業が面倒であるのに対し、この例では駒７０，８０は本体６０の駒配置穴６４に入れるだけでよく、ピンは不要であり、よって組立を簡易に行うことができる。
（３）２つの駒７０，８０はそれらの中央部７１，８１が互いに重なる構成となっているため、高さ方向も水平方向も小さくまとめることができ、その分、省スペース化を図ることができる。
（４）試料の付着等により駒７０，８０が戻らず、ロック状態となっても、駒７０，８０に設けた穴７５，８７に工具１２０を差し込む一動作で簡単に駒７０，８０を移動させ、ロック状態を解除することができる。
（５）板ばね９０を図８に示したような形状として２つの腕部９４，９５を同一形状としたことにより、２つの駒７０，８０に対し、同等のばね力を良好に付加することができる。例えば、図２１Ａに示したように単純なコの字状の板ばね１４０とした場合、２つの腕部１４１，１４２の長さは異なるため、同じばね定数にするためには図２１Ｂに示した板ばね１４０’や図２１Ｃに示した板ばね１４０”のような形状になってしまう。図２１Ｂに示した板ばね１４０’はハッチングを付した長い方の腕部１４２を基準とした場合であって、短い方の腕部１４１の幅を小さくしなければならず、強度上、使用は困難となる。一方、図２１Ｃに示した板ばね１４０”はハッチングを付した短い方の腕部１４１を基準とした場合であって、この場合は長い方の腕部１４１の幅が極めて大きくなり、スペース上、使用は困難となる。この例では板ばね９０を図８に示したような形状としたことにより、このような強度やスペースの問題を解消することができる。
（６）抑え１００は十字形状をなす突出部１０２より厚さが大とされ、本体６０の凹部６６に収容される円柱部１０１を中央に有し、この部分にねじ穴１０３が形成されているため、ねじ穴１０３の長さを長くすることができる。例えば、図２２に示したような構成の取付金具５０’とし、本体６０’及び抑え１００’を図２２に示したような形状として単純に重ねる構造とした場合、高さ方向の寸法を抑えるためには抑え１００’は薄くしなければならず、即ちねじ穴１０３の長さは短くなってしまう。ねじ穴１０３はロック状態を解除する工具１２０のねじ１２２ａとかみ合うものであって、ねじ穴１０３が短くなることは強度上、問題となり、破損し易いものとなる。この点、この例ではねじ穴１０３の強度を確保することができる。 As mentioned above, although the Example of this invention was described, according to the Example mentioned above, the following effects can be acquired.
(1) Since the pieces 70 and 80 move horizontally by the centrifugal force generated by the rotation of the rotor 40 and the rotor 40 and the shaft 30 are fastened, the rotor 40 only needs to be placed on the shaft 30.
(2) In the conventional structure shown in FIG. 23 using centrifugal force, the male members 9-1 and 9-2 movable by centrifugal force are supported by pins (rotating shafts 11-1 and 11-2). The structure using such a pin is troublesome to assemble, but in this example, the pieces 70 and 80 need only be inserted into the piece arrangement hole 64 of the main body 60, and no pins are required. It can be done easily.
(3) Since the two pieces 70 and 80 have a configuration in which their central portions 71 and 81 overlap each other, the height direction and the horizontal direction can be reduced, and space can be saved accordingly. it can.
(4) Even if the pieces 70 and 80 do not return due to sample adhesion or the like and are locked, the pieces 70 and 80 are simply moved by one operation of inserting the tool 120 into the holes 75 and 87 provided in the pieces 70 and 80. The lock state can be released.
(5) The leaf spring 90 is shaped as shown in FIG. 8 and the two arms 94 and 95 have the same shape, so that the same spring force can be applied to the two pieces 70 and 80. Can do. For example, in the case of a simple U-shaped leaf spring 140 as shown in FIG. 21A, since the lengths of the two arm portions 141 and 142 are different, the same spring constant is shown in FIG. 21B. The leaf spring 140 ′ or the leaf spring 140 ″ shown in FIG. 21C is shaped. The leaf spring 140 ′ shown in FIG. 21B is a case where the longer arm portion 142 with hatching is used as a reference. Thus, the width of the shorter arm portion 141 must be reduced, which makes it difficult to use in strength. On the other hand, the leaf spring 140 ″ shown in FIG. In this case, the width of the longer arm portion 141 becomes extremely large, and it becomes difficult to use it because of space. In this example, the leaf spring 90 has a shape as shown in FIG. 8, whereby such problems of strength and space can be solved.
(6) The restraint 100 is thicker than the cross-shaped projecting portion 102, and has a cylindrical portion 101 accommodated in the concave portion 66 of the main body 60 in the center, and a screw hole 103 is formed in this portion. Therefore, the length of the screw hole 103 can be increased. For example, in the case where the mounting bracket 50 ′ is configured as shown in FIG. 22 and the main body 60 ′ and the restraint 100 ′ are simply stacked in the shape as shown in FIG. 22, the dimension in the height direction is suppressed. In other words, the restraint 100 'must be thinned, that is, the length of the screw hole 103 is shortened. The screw hole 103 meshes with the screw 122a of the tool 120 for releasing the lock state, and shortening the screw hole 103 causes a problem in strength and is easily damaged. In this respect, in this example, the strength of the screw hole 103 can be ensured.

１回転シャフト２回転ヘッド
３ロータ４蓋
５試料挿入部６，７ロータ穴
８フレーム９−１，９−２雄型部材
１０ガイドピン１１−１，１１−２回転軸
１２軸心１３−１，１３−２凸部
１４，１５貫通穴１６ロータ結合部
１７駆動ピン１８凹部
１９円柱部分２０円錐台部分
２１つまみ２２ネジ部
３０シャフト３１大径部
３２小径部３３テーパ部
３４ロータ結合部３４ａ内部底面
３５環状凹部３５ａ底面
３６環状凸部３６ａ第１シャフト傾斜面
３６ｂ第２シャフト傾斜面３７駆動ピン
３８穴４０ロータ
４１ロータ穴４１ａ底面
４１ｂテーパ面４２穴
４３回転中心軸４４穴
４５容器穴５０，５０’ 取付金具
６０，６０’ 本体６１円柱部
６２フランジ部６３駆動ピン接触部
６４駒配置穴６５開口
６６凹部６７溝
６８ａねじ穴６８ｂ穴
６９角柱７０駒
７０ａ底面７１中央部
７１ａ側面７２側壁部
７２ａ外側面７２ｂ第２傾斜面
７２ｃ第１傾斜面７２ｄ水平面
７３溝７４連結部
７５穴７６傾斜面
８０駒８０ａ底面
８１中央部８１ａ，８１ｂ側面
８２側壁部８２ａ外側面
８２ｂ第２傾斜面８２ｃ第１傾斜面
８２ｄ水平面８３溝
８４，８５外壁部８６連結部
８７穴８８傾斜面
９０板ばね９１基部
９２，９３延長部９４，９５腕部
９６穴１００，１００’ 抑え
１０１円柱部１０２突出部
１０３ねじ穴１１０ボルト
１２０工具１２１把持部
１２２軸部１２２ａねじ
１３０ボルト１４０，１４０’，１４０” 板ばね
１４１，１４２腕部 DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotating head 3 Rotor 4 Lid 5 Sample insertion part 6, 7 Rotor hole 8 Frame 9-1, 9-2 Male member 10 Guide pin 11-1, 11-2 Rotating shaft 12 Axis 13-1, 13-2 Protrusions 14 and 15 Through-hole 16 Rotor coupling part 17 Drive pin 18 Concave part 19 Column part 20 Frustum part 21 Knob 22 Screw part 30 Shaft 31 Large diameter part 32 Small diameter part 33 Taper part 34 Rotor coupling part 34a Internal bottom surface 35 annular recess 35a bottom surface 36 annular projection 36a first shaft inclined surface 36b second shaft inclined surface 37 drive pin 38 hole 40 rotor 41 rotor hole 41a bottom surface 41b tapered surface 42 hole 43 rotation center shaft 44 hole 45 container hole 50, 50 'Mounting brackets 60, 60' Body 61 Column 62 Flange 63 Drive pin contact 64 Frame arrangement hole 65 Opening 66 Portion 67 Groove 68a Screw hole 68b Hole 69 Square column 70 Top 70a Bottom surface 71 Central portion 71a Side surface 72 Side wall portion 72a Outer side surface 72b Second inclined surface 72c First inclined surface 72d Horizontal surface 73 Groove 74 Connecting portion 75 Hole 76 Inclined surface 80 Frame 80a Bottom surface 81 Central portion 81a, 81b Side surface 82 Side wall portion 82a Outer side surface 82b Second inclined surface 82c First inclined surface 82d Horizontal surface 83 Groove 84, 85 Outer wall portion 86 Connection portion 87 Hole 88 Inclined surface 90 Leaf spring 91 Base portions 92, 93 Extension Part 94,95 arm part 96 hole 100,100 'holding 101 column part 102 projecting part 103 screw hole 110 bolt 120 tool 121 grip part 122 shaft part 122a screw 130 bolt 140,140', 140 "leaf spring 141,142 arm part

Claims

A structure for attaching a rotor to a shaft in a centrifuge,
The tip side of the shaft is a cylindrical rotor coupling portion,
An annular concave portion is formed on the inner peripheral surface of the rotor coupling portion, and an annular convex portion is configured on the tip side from the annular concave portion,
A corner of the inner peripheral surface of the annular convex portion on the annular concave portion side is chamfered to form a first shaft inclined surface, and a surface extending from the first shaft inclined surface to the bottom surface of the annular concave portion is the bottom surface. And the second shaft inclined surface making an acute angle with
The rotor has a rotor hole into which the shaft is inserted, and a mounting bracket is disposed in the rotor hole.
The mounting bracket is
A main body accommodated in the rotor coupling portion;
A first piece and a second piece arranged in a piece arrangement hole formed through the main body in a direction perpendicular to the rotation center axis of the rotor;
A base, two long and short extensions bent in the same direction from both ends of the base, and two arms extending in an arc from the tip of each extension so as to surround the rotation center axis. A leaf spring in which the extension part and the arm part are inserted into the piece arrangement hole through an opening formed above the piece arrangement hole so as to communicate with the piece arrangement hole in the main body,
It is mounted on the main body and consists of a restraint that sandwiches the base between the main body,
The first piece has a first groove into which the arm part formed in the longer extension part is inserted, and is located on one end side of the piece arrangement hole across the first groove. And a first central portion located on the rotation center axis,
The second piece has a second groove into which the arm part formed in the shorter extension part is inserted, and is located on the other end side of the piece arrangement hole with the second groove interposed therebetween. Two side wall portions and a second central portion located on the first central portion,
Each outer surface of the first side wall and the second side wall has an arc shape, and a first inclined surface corresponding to a shape formed by the first shaft inclined surface and the second shaft inclined surface at the upper end. And a second inclined surface are formed,
When the rotor is stopped, the first and second pieces are positioned by the arm portions and located in the piece arrangement holes,
When the rotor is rotated by the rotation of the shaft, the first and second pieces move so as to protrude from one end and the other end of the piece arrangement hole against the spring force of the leaf spring by centrifugal force. The first inclined surface is in contact with the first shaft inclined surface,
2. The rotor mounting structure according to claim 1, wherein the lifting of the rotor with respect to the shaft is prevented by the second inclined surface coming into contact with the second shaft inclined surface.

The rotor mounting structure according to claim 1,
The bottom surface of the second piece has a U-shape in which the second side wall portion forms a middle portion of the U-shape,
The rotor mounting structure, wherein a part of the first central portion is located in the U-shape.

In the rotor mounting structure according to claim 1 or 2,
A hole centered on the rotation center axis is formed through the bottom surface of the rotor hole, the base, the first and second center portions, and the lower part of the piece arrangement hole of the main body, and coincides with the position of the hole. A screw hole is formed to penetrate the restraint,
A portion of the first central portion opposite to the first groove in the upper peripheral edge of the hole and a portion of the second central portion opposite to the second groove in the upper peripheral edge of the hole are respectively cut. An attachment structure for a rotor, characterized in that an inclined surface is formed.

In the rotor mounting structure according to claim 3,
The restraint consists of a cylindrical part in which the screw hole is formed, and a protruding part that protrudes in a cross shape from the peripheral surface on the upper end side of the cylindrical part,
A mounting structure for a rotor, wherein the main body is formed with a recess into which the cylindrical portion enters and a groove into which the protrusion enters.

A centrifugal separator comprising the rotor mounting structure according to any one of claims 1 to 4.