JP4715487B2 - Liquid supply device in dispenser etc. - Google Patents
Liquid supply device in dispenser etc. Download PDFInfo
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- JP4715487B2 JP4715487B2 JP2005354690A JP2005354690A JP4715487B2 JP 4715487 B2 JP4715487 B2 JP 4715487B2 JP 2005354690 A JP2005354690 A JP 2005354690A JP 2005354690 A JP2005354690 A JP 2005354690A JP 4715487 B2 JP4715487 B2 JP 4715487B2
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- 239000007788 liquid Substances 0.000 title claims description 27
- 239000000463 material Substances 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 26
- 230000005284 excitation Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 27
- 239000012085 test solution Substances 0.000 description 11
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 239000011344 liquid material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241001137251 Corvidae Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 235000015108 pies Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Automatic Analysis And Handling Materials Therefor (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Linear Motors (AREA)
Description
本発明は、液体の吐出及び/又は吸入を行う分注機などの液体供給装置に関する。 The present invention relates to a liquid supply apparatus such as a dispenser for performing the discharge and / or suction of liquids.
通常、検体の分析プロセス等においては、試薬の分注、容器の移動、容器内検体の反応、撹拌等に際し、精度の高い位置決めを行う必要があり、例えば、試薬等の液体を複数の容器に分配状に注入する分注機、試験管内の検体を撹拌棒の挿入により撹拌する攪拌機、各種センサーを近接停止して容器内検体の分析や、反応促進する分析機などが知られている。これらの多くの装置は、作動体を直線動作させるリニア位置決め駆動機構を備えており、例えば、分注機では、試液の吐出口や吸入口となるニードルを直線動作させるリニア位置決め駆動機構が設けられる。 In general, in sample analysis processes, it is necessary to perform highly accurate positioning when dispensing reagents, moving containers, reacting specimens in containers, stirring, etc. For example, liquids such as reagents are placed in multiple containers. A dispenser that injects in a distributed manner, an agitator that stirs a sample in a test tube by inserting a stirring rod, an analysis of a sample in a container by stopping proximity of various sensors, an analyzer that promotes a reaction, and the like are known. Many of these apparatuses are provided with a linear positioning drive mechanism that linearly moves the operating body. For example, a dispenser is provided with a linear positioning drive mechanism that linearly operates needles that serve as a discharge port and a suction port for a reagent solution. .
しかしながら、従来のリニア位置決め駆動機構は、モータ軸が回転する回転型モータを動力源とし、送りネジの一端をカップリングを介してモータ軸と連結し、中間を連結ナット部材を介して作動体に螺合させ、他端を基体に回転可能に軸支した構造のものであるため、駆動機構の部品点数や構造が複雑になり、コスト高の要因となる不都合がある。 However, the conventional linear positioning drive mechanism uses a rotary motor with a rotating motor shaft as a power source, connects one end of a feed screw to the motor shaft via a coupling, and connects the middle to an operating body via a connecting nut member. Since it has a structure in which the other end is rotatably supported on the base body, the number of parts and the structure of the drive mechanism are complicated, and there is an inconvenience that increases the cost.
そこで、この様な複雑な機構を不要とし、安価なものとするために、直動モータを動力源としたリニア位置決め機構が提案されている(例えば、特許文献1参照)。特許文献1に記載された直動モータは、ネジ軸からなるモータ軸と、該モータ軸に螺合する回転ナットが内装されたモータ本体とを備え、回転ナットの回転駆動によりモータ軸を相対的に直線動作させるリニアステッピングモータであるが、リニア位置決め機構では、いわゆるリニアシャフトモータの適用も可能である。このリニアシャフトモータは、N極とS極が交互に配列された棒状磁石からなるモータ軸と、コイル部材を内装したモータ本体とを備えており、コイル部材の励磁によりモータ軸を相対的に直線動作させるものである(例えば、特許文献2〜5参照)。 Therefore, in order to eliminate the need for such a complicated mechanism and to make it inexpensive, a linear positioning mechanism using a linear motor as a power source has been proposed (for example, see Patent Document 1). The linear motion motor described in Patent Document 1 includes a motor shaft formed of a screw shaft and a motor body in which a rotating nut that is screwed to the motor shaft is housed, and the motor shaft is relatively moved by rotational driving of the rotating nut. However, in the linear positioning mechanism, a so-called linear shaft motor can be applied. This linear shaft motor includes a motor shaft made up of rod-shaped magnets in which N poles and S poles are alternately arranged, and a motor main body with a coil member incorporated therein, and the motor shaft is relatively straightened by excitation of the coil member. It operates (for example, refer to Patent Documents 2 to 5).
特許文献1に記載されるリニア位置決め機構は、試薬の分注を行うシリンダユニットに適用され、直動モータの駆動力でピストンを直線動作させているが、このようなリニア位置決め機構をニードルなどのパイプ材の直線動作に適用することも提案される。例えば、特許文献6に示される分注装置(2)に直動モータを連結すれば、直動モータによるニードル(11)の直線動作が可能である。 The linear positioning mechanism described in Patent Document 1 is applied to a cylinder unit that dispenses a reagent, and a piston is linearly operated by a driving force of a linear motion motor. It is also proposed to apply to linear motion of pipe material. For example, if a linear motion motor is connected to the dispensing device (2) disclosed in Patent Document 6, the linear motion of the needle (11) by the linear motion motor is possible.
しかしながら、この様なリニア位置決め機構では、直動モータとニードル(11)の間に分注装置(2)が介在するので、装置のコンパクト化が難しい。特に、複数のニードル(11)を連設したり、これらのニードル(11)をそれぞれ独立的に直線動作させるリニア位置決め機構にあっては、装置の大型化や構造の複雑化が著しいだけでなく、大幅なコスト高になるという問題がある。また、この場合、直動モータ自体が持つ螺合公差などの誤差に加え、直動モータと分注装置(2)の連結誤差や、分注装置(2)に対するニードル(11)の取付誤差が影響するので、必要な位置決め精度を確保できない可能性もある。
本発明は、上記の如き問題点を一掃すべく創案されたものであって、リニアシャフトモータを用いて液体供給路を直線動作させるものでありながら、円盤状のマグネットの中心に形成された丸孔をパイプ材を挿通固定するための軸孔として利用しているので、リニアシャフトモータとパイプ材の間に中間部材を介することなく、液体供給路となるパイプ材を、外パイプと共に直接的に直線動作させるだけで、パイプ材の下端部に形成されたニードル部から、容器に対する液体の吐出・吸入による定量分与や分注を行うことができ、しかも、液体供給路を直線動作させるリニア位置決め機構のコンパクト化が可能になり、特に、複数の液体供給路を連設したり、これらの液体供給路をそれぞれ独立的に直線動作させるリニア位置決め機構にあっては、装置の小型化や構造の簡略化が顕著になるだけでなく、大幅なコストダウンが図れ、さらには、中間部材による誤差の増加を排除し、位置決め精度の向上も図れる分注機等における液体供給装置の提供を目的とする。 The present invention, which has been made in order to wipe out such problems described above, yet one which linearly moves the liquid-supplying path using a linear shaft motor, which is formed in the center of the disk-shaped magnet since it used as a shaft hole for inserting fixing the pipe material the round hole, without passing through an intermediate member between the linear shaft motor and pipe material, the pipe material made of a liquid-supplying path, directly with the outer pipe manner only by linear motion, the needle portion formed at the lower end of the pipe, it is possible to perform a quantitative dispensing and dispensing by the discharge-suction of the liquid to the container, moreover, the linear motion of the liquid-supplying passage It is thereby enables compact linear positioning mechanism, in particular, or continuously provided a plurality of liquid-supplying passage, there these liquids supply path each independently linear positioning mechanism for linearly operating In not only simplify the miniaturization and structure of the apparatus becomes remarkable, encourages significant cost, and further, eliminates the increase in the error due to the intermediate member, the dispensing machine such that attained also improving the positioning accuracy and an object thereof is to provide a liquid supply apparatus.
上記課題を解決するために本発明の分注機等における液体供給装置は、液体の吐出及び/又は吸入を行う液体供給装置において、液体供給路をモータの駆動で直線動作させるにあたり、前記モータを、外パイプ内に中心に丸孔が形成されたマグネットを直列状に配設せしめたモータ軸と、コイル部材を内装したモータ本体とを備え、前記コイル部材の励磁によりモータ本体に対してモータ軸を相対的に直線動作させるリニアシャフトモータで構成すると共に、前記マグネットの丸孔を、モータ軸の軸心に沿って形成される軸孔として利用し、該マグネットの軸孔に、下端部に液体の吐出口及び/又は吸入口となるニードル部が形成されたパイプ材を、前記外パイプの下端からニードル部を突出させて挿通固定し、該挿通固定したパイプ材を液体供給路に構成せしめ、該パイプ材を、前記リニアシャフトモータの駆動にもとづいて、前記外パイプと共に上下方向に直線動作させることで、前記パイプ材内の液体を前記ニードル部から容器に吐出すべく構成したことを特徴とするものである。 Liquid supply apparatus in the dispensing machine or the like of the present invention in order to solve the above problems, in the liquid supply apparatus that performs discharging and / or inhalation of the liquid body, when to linearly operate the liquid-supplying passage by driving the motor The motor includes a motor shaft in which a magnet having a round hole formed in the center in an outer pipe is arranged in series, and a motor body with a coil member incorporated therein, and the motor body is excited by excitation of the coil member. In contrast to the linear shaft motor that relatively linearly moves the motor shaft, the round hole of the magnet is used as a shaft hole formed along the axis of the motor shaft . A pipe member having a needle part that serves as a liquid discharge port and / or a suction port at the lower end is inserted and fixed by protruding the needle part from the lower end of the outer pipe, and the pipe member that has been inserted and fixed is liquid. Allowed construction supply path, the pipe member, in accordance with the driving of the linear shaft motor, the outer pipe with that is linearly operated in a vertical direction, in order to discharge the liquid in the pipe material into the container from the needle portion It is characterized by comprising.
本発明は、上記のように構成したことにより、リニアシャフトモータを用いて液体供給路を直線動作させるものでありながら、円盤状のマグネットの中心に形成された丸孔をパイプ材を挿通固定するための軸孔として利用しているので、リニアシャフトモータとパイプ材の間に中間部材を介することなく、液体供給路となるパイプ材を、外パイプと共に直接的に直線動作させるだけで、パイプ材の下端部に形成されたニードル部から、容器に対する液体の吐出・吸入による定量分与や分注を行うことができ、しかも、液体供給路を直線動作させるリニア位置決め機構のコンパクト化が可能になり、特に、複数の液体供給路を連設したり、これらの液体供給路をそれぞれ独立的に直線動作させるリニア位置決め機構にあっては、装置の小型化や構造の簡略化が顕著になるだけでなく、大幅なコストダウンが図れ、さらには、中間部材による誤差の増加を排除し、位置決め精度の向上も図れる。 The present invention, by the structure described above, yet one which linearly moves the liquid-supplying path using a linear shaft motor, a disk-shaped magnet center which is formed in a circular hole of the insertion of the pipe member fixed since used as a shaft hole for, without the intervention of intermediate member between the linear shaft motor and pipe material, the pipe material made of a liquid-supplying channel, only directly to linearly move together with the outer pipe, from the needle portion formed at the lower end of the pipe, it is possible to perform a quantitative dispensing and dispensing by the discharge-suction of the liquid to the container, moreover, compact linear positioning mechanism to linearly move the liquid-supplying passage allows, in particular, or continuously provided a plurality of liquid-supplying passage, in the these liquids supply path each independently linear positioning mechanism to linear motion, Ya size of the apparatus Not only simplification of granulation becomes significant, encourages significant cost, and further, eliminates the increase in the error due to the intermediate member, thereby also improving the positioning accuracy.
以下、本発明の実施の形態を好適な実施の形態として例示する流体供給装置を図面に基づいて詳細に説明する。 DESCRIPTION OF EMBODIMENTS Hereinafter, a fluid supply apparatus that exemplifies an embodiment of the present invention as a preferred embodiment will be described in detail with reference to the drawings.
[第一実施形態]
図1は、本発明の第一実施形態に係る流体供給装置を示す断面図である。この図に示すように、本発明の第一実施形態に係る流体供給装置1Aは、試液(流体)を検体容器2に分注(吐出)する分注機(定量分与器)に応用したものであって、試液を貯溜する試液容器3と、チューブ4を介して試液容器3から試液を吸入するポンプ5と、可撓性のチューブ6を介してポンプ5から送られる試液を検体容器2内に吐出するパイプ材(流体供給経路の一部)7と、該パイプ材7を上下方向に直線動作させる直動モータ8と、直動モータ8やパイプ材7を支持するブラケット9とを備えて構成される。
[First embodiment]
FIG. 1 is a cross-sectional view showing a fluid supply apparatus according to a first embodiment of the present invention. As shown in this figure, the fluid supply apparatus 1A according to the first embodiment of the present invention is applied to a dispenser (quantitative dispenser) that dispenses (discharges) a test solution (fluid) to a specimen container 2. In the specimen container 2, the test solution container 3 for storing the test solution, the pump 5 for sucking the test solution from the test solution container 3 through the tube 4, and the test solution sent from the pump 5 through the flexible tube 6 A pipe material (part of the fluid supply path) 7 to be discharged into the pipe, a linear motion motor 8 that linearly moves the pipe material 7 in the vertical direction, and a bracket 9 that supports the linear motion motor 8 and the pipe material 7. Composed.
第一実施形態の直動モータ8は、N極とS極が交互に配列された棒状磁石からなるモータ軸10と、コイル部材を内装したモータ本体11とを備え、コイル部材の励磁によりモータ軸10を相対的に直線動作させるリニアシャフトモータである。通常、リニアシャフトモータのモータ軸10は、N極及びS極を構成する円盤状のマグネット(永久磁石)12を外パイプ13内に直列状に配列して構成されるが、本実施形態のモータ軸10には、中心に丸孔が形成されたドーナッツ状のマグネット12を適用することにより、軸心部を貫通する軸孔10aが形成される。なお、ブラケット9は、正面視コ字形の固定部材であって、直動モータ8のモータ本体11を固定支持すると共に、上下一対のガイド14を介してモータ軸10を上下スライド自在に支持している。 A linear motion motor 8 according to the first embodiment includes a motor shaft 10 formed of a bar magnet in which N poles and S poles are alternately arranged, and a motor main body 11 having a coil member therein, and the motor shaft is excited by excitation of the coil member. 10 is a linear shaft motor that relatively linearly operates 10. Normally, the motor shaft 10 of a linear shaft motor is configured by arranging disk-shaped magnets (permanent magnets) 12 constituting N poles and S poles in series in an outer pipe 13. The shaft 10 is formed with a shaft hole 10a penetrating the shaft center portion by applying a donut-shaped magnet 12 having a round hole formed in the center. The bracket 9 is a U-shaped fixing member in a front view. The bracket 9 fixes and supports the motor body 11 of the linear motor 8 and supports the motor shaft 10 slidably up and down via a pair of upper and lower guides 14. Yes.
パイプ材7は、例えば、ステンレス管であって、その下端部には、試液の吐出口となるニードル部7aが形成され、上端部は、チューブ6を介してポンプ5に接続される。直動モータ8によるパイプ材7の直線動作は、中間部材を介することなく直接的に行われる。具体的には、モータ軸10の軸心に沿って形成される軸孔10aにパイプ材7を挿通固定し、該挿通固定したパイプ材7を直動モータ8の駆動にもとづいて上下方向に直線動作させる。なお、この場合、軸孔10aは供給路として利用され、流路としての供給路はパイプ材7として構成されている。 The pipe material 7 is, for example, a stainless steel tube, and a needle portion 7 a serving as a reagent solution discharge port is formed at a lower end portion of the pipe material 7, and an upper end portion is connected to the pump 5 via the tube 6. The linear motion of the pipe material 7 by the linear motion motor 8 is directly performed without an intermediate member. Specifically, the pipe material 7 is inserted and fixed in the shaft hole 10 a formed along the axis of the motor shaft 10, and the pipe material 7 inserted and fixed is linearly moved in the vertical direction based on the drive of the linear motion motor 8. Make it work. In this case, the shaft hole 10 a is used as a supply path, and the supply path as a flow path is configured as a pipe material 7.
パイプ材7は、洗浄や交換を可能とするために、モータ軸10に対して着脱自在であることが好ましい。例えば、パイプ材7の上端部に上部止め板15を固設し、下端部に着脱自在な下部止め板16を装着する。このようにすると、パイプ材7をモータ軸10の軸孔10aに上方から挿通した後、パイプ材7の下端部に下部止め板16を装着することにより、パイプ材7をモータ軸10に取り付け固定でき、また、逆の手順により、パイプ材7をモータ軸10から取り外すことが可能になる。なお、本実施形態では、ブラケット9に設けたフォトセンサ17で下部止め板16を検出することにより、モータ軸10の上昇リミット検出を行っている。また、ブラケット9には、ブレーキ用ソレノイド18が設けれられており、ブレーキ用ソレノイド18でモータ軸10の外周を制動することにより、モータ軸10の停止位置が保持される。 The pipe material 7 is preferably detachable with respect to the motor shaft 10 in order to enable cleaning and replacement. For example, an upper stopper plate 15 is fixed to the upper end portion of the pipe material 7 and a detachable lower stopper plate 16 is attached to the lower end portion. In this way, after the pipe material 7 is inserted into the shaft hole 10a of the motor shaft 10 from above, the lower stopper plate 16 is attached to the lower end portion of the pipe material 7 so that the pipe material 7 is attached to the motor shaft 10 and fixed. The pipe material 7 can be detached from the motor shaft 10 by the reverse procedure. In the present embodiment, the upper limit of the motor shaft 10 is detected by detecting the lower stopper plate 16 with the photo sensor 17 provided on the bracket 9. The bracket 9 is provided with a brake solenoid 18, and the brake shaft 18 is braked on the outer periphery of the motor shaft 10, whereby the stop position of the motor shaft 10 is maintained.
[第二実施形態]
次に、本発明の第二実施形態に係る流体供給装置1Bを図2に沿って説明する。ただし、前記実施形態と共通の構成については、前記実施形態と同じ符号を付け、前記実施形態の説明を援用する。
[Second Embodiment]
Next, the fluid supply apparatus 1B according to the second embodiment of the present invention will be described with reference to FIG. However, about the structure common to the said embodiment, the same code | symbol as the said embodiment is attached | subjected and description of the said embodiment is used.
図2は本発明の第二実施形態に係る流体供給装置を示す要部断面図である。この図に示すように、本発明の第二実施形態に係る流体供給装置1Bは、モータ軸10をリニアガイド機構19でリニアガイドする点が前記実施形態と相違している。リニアガイド機構19は、例えば、モータ軸10の上下両端部を一体的に支持する正面視コ字状の可動部20と、該可動部20を固定部21に対して上下方向移動自在にガイドするガイド部22とを備えて構成されている。このようなリニアガイド機構19を用いてモータ軸10をリニアガイドすると、モータ軸10の支持強度が高められるだけでなく、モータ本体11に優る精度でモータ軸10をリニアガイドし、位置決め精度の向上が図れる。 FIG. 2 is a cross-sectional view of a main part showing a fluid supply apparatus according to the second embodiment of the present invention. As shown in this figure, the fluid supply apparatus 1B according to the second embodiment of the present invention is different from the above embodiment in that the motor shaft 10 is linearly guided by a linear guide mechanism 19. The linear guide mechanism 19 is, for example, a U-shaped movable part 20 that integrally supports upper and lower ends of the motor shaft 10 and guides the movable part 20 to the fixed part 21 so as to be movable in the vertical direction. A guide portion 22 is provided. When the linear guide mechanism 19 is used to linearly guide the motor shaft 10, not only the support strength of the motor shaft 10 is increased, but also the motor shaft 10 is linearly guided with higher accuracy than the motor body 11 to improve positioning accuracy. Can be planned.
[第三実施形態]
次に、本発明の第三実施形態に係る流体供給装置1Cを図3に沿って説明する。ただし、前記実施形態と共通の構成については、前記実施形態と同じ符号を付け、前記実施形態の説明を援用する。
[Third embodiment]
Next, a fluid supply apparatus 1C according to a third embodiment of the present invention will be described with reference to FIG. However, about the structure common to the said embodiment, the same code | symbol as the said embodiment is attached | subjected and description of the said embodiment is used.
図3は本発明の第三実施形態に係る流体供給装置を示す断面図である。この図に示すように、本発明の第三実施形態に係る流体供給装置1Cは、試液の吸入・貯溜・吐出する分注工程を行う分注装置への応用例を示したものであり、直動モータ23としてリニアステッピングモータを用いる点や、ポンプに代えてシリンダユニット24を備える点が前記実施形態と相違している。直動モータ23として用いるリニアステッピングモータは、ネジ軸からなるモータ軸25と、該モータ軸25に螺合する回転ナットが内装されたモータ本体26とを備え、回転ナットの回転駆動によりモータ軸25を相対的に直線動作させるように構成されており、その使用に際しては、モータ軸25を回り止めする必要があるものの、リニアシャフトモータに比して安価であるだけでなく、ブレーキを掛けなくてもモータ軸25の停止位置を保持できるという利点がある。また、モータ軸25の軸孔25aにパイプ材7を挿通固定して試液(通常は低温に維持)を流すと、モータ軸25の温度上昇が抑えられるので、モータ軸25の熱膨張による螺入公差の変動を抑止し、位置決め精度を向上させることが可能になる。 FIG. 3 is a sectional view showing a fluid supply apparatus according to the third embodiment of the present invention. As shown in this figure, the fluid supply device 1C according to the third embodiment of the present invention shows an application example to a dispensing device that performs a dispensing step of sucking, storing, and discharging a test solution. The point which uses a linear stepping motor as the dynamic motor 23, and the point provided with the cylinder unit 24 instead of a pump differ from the said embodiment. The linear stepping motor used as the linear motion motor 23 includes a motor shaft 25 formed of a screw shaft, and a motor main body 26 provided with a rotating nut screwed into the motor shaft 25. The motor shaft 25 is driven by rotation of the rotating nut. The motor shaft 25 needs to be prevented from rotating when used, but is not only cheaper than a linear shaft motor but also has no brake applied. There is also an advantage that the stop position of the motor shaft 25 can be held. Further, if the pipe material 7 is inserted and fixed in the shaft hole 25a of the motor shaft 25 and a test solution (usually maintained at a low temperature) is flowed, the temperature rise of the motor shaft 25 can be suppressed. It becomes possible to suppress tolerance fluctuations and improve positioning accuracy.
第三実施形態のモータ軸25は、第二実施形態と同様に、リニアガイド機構27でリニアガイドされる。リニアガイド機構27は、例えば、モータ軸25の上下両端部を一体的に支持する正面視コ字状の可動部28と、該可動部28を固定部29に対して上下方向移動自在にガイドするガイド部30とを備えて構成されている。このようなリニアガイド機構27を用いてモータ軸25をリニアガイドすると、モータ軸25の支持強度が高められるだけでなく、モータ本体26に優る精度でモータ軸25をリニアガイドし、位置決め精度の向上が図れる。なお、シリンダユニット24は、例えば、試液を貯溜するシリンジ31と、シリンジ31内をスライドするピストン32と、ピストン32を直線動作させるモータ(リニアステッピングモータ)33とを備えて構成されるものである。
The motor shaft 25 of the third embodiment is linearly guided by the linear guide mechanism 27 as in the second embodiment. The linear guide mechanism 27 is, for example, a U-shaped movable portion 28 that integrally supports upper and lower ends of the motor shaft 25 and guides the movable portion 28 to the fixed portion 29 so as to be movable in the vertical direction. A guide unit 30 is provided. When the motor shaft 25 is linearly guided using such a linear guide mechanism 27, not only the support strength of the motor shaft 25 is increased, but also the motor shaft 25 is linearly guided with higher accuracy than the motor body 26, and the positioning accuracy is improved. Can be planned. The cylinder unit 24 includes, for example, a syringe 31 that stores a test solution, a piston 32 that slides inside the syringe 31, and a motor (linear stepping motor) 33 that linearly operates the piston 32. .
叙述の如く構成された本発明の実施の形態において、流体の吐出及び/又は吸入を行う流体供給装置1における流体(試液)供給路を、直動モータ8の駆動で直線動作させるのであるが、リニアシャフトモータ8のモータ軸10は、外パイプ13内にドーナッツ状のマグネット12が直列状に配設されており、その軸心に沿って形成されるマグネット12の丸孔をパイプ材7を挿通する軸孔10aとして利用し、該マグネット12の軸孔10aに、下端部にニードル部7aが形成されたパイプ材7を、外パイプ13の下端からニードル部7aを突出させて挿通固定し、該挿通固定したパイプ材7を液体供給路に構成せしめ、該パイプ材7は、前記直動モータ8の駆動にもとづいて、外パイプ13と共に上下方向に直線動作させることで、パイプ材7内の液体を、ニードル部7aから容器2に吐出させる構成となっているので、当該中心に丸孔が形成されたマグネット12の軸孔10aを、試液の吐出・吸入を行う定量分与器や分注装置等に対し、ポンプ5やシリンダユニット24に連通する液体供給路の一部となるパイプ材7を挿通固定するための挿通孔として利用でき、また、特許文献1の如きのシリンダユニット機構により、シリンダ自体が試液の吸入・貯溜・吐出する機能を有する分注装置や、シリンダユニット24のシリンダ部31に対しても、貯溜機能を備えた液体供給路として利用することができる。その結果、リニアシャフトモータ8を用いて液体供給路を直線動作させるものでありながら、中間部材を介することなく、液体供給路となるパイプ材7を、外パイプ13と共に直接的に直線動作させるだけで、パイプ材7の下端部に形成されたニードル部7aから、容器2に対する液体の吐出及・吸入による定量分与や分注作業を行うことができ、しかも、液体供給路を直線動作させるリニア位置決め機構のコンパクト化が可能になり、特に、複数の流体供給路を連設したり、これらの液体供給路をそれぞれ独立的に直線動作させるリニア位置決め機構にあっては、装置の小型化や構造の簡略化が顕著になるだけでなく、大幅なコストダウンが図れ、さらには、中間部材による誤差の増加を排除し、位置決め精度の向上も図ることができる利点がある。 In the embodiment of the present invention configured as described above, the fluid (sample solution) supply path in the fluid supply device 1 that discharges and / or sucks fluid is linearly operated by driving the linear motor 8. The motor shaft 10 of the linear shaft motor 8 has donut-shaped magnets 12 arranged in series in an outer pipe 13, and the pipe material 7 is inserted through a round hole of the magnet 12 formed along the axis. The pipe material 7 having the needle portion 7a formed at the lower end portion is inserted into and fixed to the shaft hole 10a of the magnet 12 with the needle portion 7a protruding from the lower end of the outer pipe 13, the pipe member 7 which is inserted and fixed allowed construction to the liquid supply path, the pipe material 7, in accordance with the driving of the linear motor 8, by linearly moves in the vertical direction together with the outer pipe 13, pies The liquid in the timber 7, so has a configuration to eject the needle portion 7a in the container 2, the shaft hole 10a of the magnet 12 round hole in the center of which is formed, quantitative dispensing performing discharge-suction of reagent to vessels and dispensing device, the pipe material 7 serving as a part of the liquid-supplying passage communicating with the pump 5 and the cylinder unit 24 can be used as an insertion hole for inserting fixing, also, such as the Patent Document 1 the cylinder unit mechanism, the dispensing apparatus and the cylinder itself has a function of inhalation, reservoir and discharge the test solution, even for the cylinder portion 31 of the cylinder unit 24, be used as a liquid material supply path having a reservoir function it can. As a result, despite one which linearly moves the liquid-supplying path using a linear shaft motor 8, without using the intermediate member, the pipe material 7 made of a liquid material supply passage, directly linearly move together with the outer pipe 13 only causes, straight from the needle portion 7a formed at the lower end of the pipe 7, it is possible to perform a quantitative dispensing and dispensing operation by discharging及-suction of the liquid to the container 2, moreover, the liquid material supply channel enables compact linear positioning mechanism to be operated, in particular, or continuously provided a plurality of fluid supply passage, in the these liquids supply path each independently linear positioning mechanism to linear motion, the device Not only will the miniaturization and simplification of the structure become prominent, but also a significant cost reduction can be achieved. Further, an increase in errors due to the intermediate member can be eliminated, and positioning accuracy can be improved. There is.
また、流体供給路をパイプ材7で構成すると共に、前記モータ軸10の軸孔10aにパイプ材を挿通固定し、該挿通固定したパイプ材7を流体供給路に構成せしめて、前記リニアシャフトモータ8の駆動にもとづいて直線動作させるようにしたので、リニアシャフトモータ8とパイプ材7の間に中間部材を介在させることなく、パイプ材7を直接的に動作させることができ、その結果、パイプ材7を直線動作させるリニア位置決め機構のコンパクト化が可能になる。特に、複数のパイプ材7を連設したり、これらのパイプ材7をそれぞれ独立的に直線動作させるリニア位置決め機構にあっては、装置の小型化や構造の簡略化が顕著になるだけでなく、大幅なコストダウンが図れる。しかも、中間部材による誤差の増加が排除されるので、位置決め精度の向上も図ることができる。 In addition, the fluid supply path is constituted by the pipe material 7, the pipe material is inserted and fixed in the shaft hole 10 a of the motor shaft 10, and the pipe material 7 inserted and fixed is configured in the fluid supply path, whereby the linear shaft motor Since the linear movement is performed based on the driving of the pipe 8, the pipe material 7 can be directly operated without interposing an intermediate member between the linear shaft motor 8 and the pipe material 7. As a result, the pipe The linear positioning mechanism for linearly moving the material 7 can be made compact. In particular, in a linear positioning mechanism in which a plurality of pipe members 7 are connected in series or each of these pipe members 7 is independently linearly operated, not only the downsizing of the apparatus and the simplification of the structure become remarkable. A significant cost reduction can be achieved. In addition, since the increase in error due to the intermediate member is eliminated, the positioning accuracy can be improved.
しかも、パイプ材7は、モータ軸10に対して着脱自在であるため、洗浄や交換を任意に行うことができる。例えば、一定の使用期間毎に新規なパイプ材7に交換したり、試液の種類を変更する毎にパイプ材7を外して洗浄する等の使用態様に対応できる。また、パイプ材7の径寸法は、軸孔10aの径寸法の範囲内で任意に選択できるので、分注機(流体供給装置)の汎用性が高められるという利点がある。また、本実施形態のパイプ材7は、一端部にニードル部7aを有するので、ニードルを別部材で構成する場合に比べ、部品点数の削減やコストダウンが図れる。 Moreover, since the pipe material 7 is detachable from the motor shaft 10, it can be arbitrarily cleaned and replaced. For example, it is possible to cope with a usage mode such as replacement with a new pipe material 7 every fixed period of use or removing the pipe material 7 and washing every time the type of the test solution is changed. Moreover, since the diameter dimension of the pipe material 7 can be arbitrarily selected within the range of the diameter dimension of the shaft hole 10a, there is an advantage that the versatility of the dispenser (fluid supply device) is enhanced. Moreover, since the pipe material 7 of this embodiment has the needle part 7a in one end part, compared with the case where a needle is comprised with another member, reduction of a number of parts and cost reduction can be aimed at.
また、本実施形態の直動モータ8は、N極とS極が交互に配列された棒状磁石からなるモータ軸10と、コイル部材を内装したモータ本体11とを備え、コイル部材の励磁によりモータ軸10を相対的に直線動作させるリニアシャフトモータであるため、可及的に長い直線動作ストロークを確保できるだけでなく、モータ軸10の回り止めが不要である。 The linear motion motor 8 of the present embodiment includes a motor shaft 10 composed of a bar magnet in which N poles and S poles are alternately arranged, and a motor main body 11 with a coil member provided therein, and the motor is excited by excitation of the coil member. Since the linear shaft motor relatively moves the shaft 10 linearly, it is possible not only to ensure as long a linear operation stroke as possible, but also to prevent the motor shaft 10 from rotating.
1A 流体供給装置
1B 流体供給装置
1C 流体供給装置
2 検体容器
3 試液容器
4 チューブ
5 ポンプ
6 チューブ
7 パイプ材
7a ニードル部
8 直動モータ
9 ブラケット
10 モータ軸
10a 軸孔
11 モータ本体
12 マグネット
13 外パイプ
14 ガイド
15 上部止め板
16 下部止め板
17 フォトセンサ
18 ブレーキ用ソレノイド
19 リニアガイド機構
20 可動部
21 固定部
22 ガイド部
23 直動モータ
24 シリンダユニット
25 モータ軸
25a 軸孔
26 モータ本体
27 リニアガイド機構
28 可動部
29 固定部
30 ガイド部
31 シリンジ
32 ピストン
1A Fluid supply device 1B Fluid supply device 1C Fluid supply device 2 Sample container 3 Sample solution container 4 Tube 5 Pump 6 Tube 7 Pipe material 7a Needle part 8 Direct acting motor 9 Bracket 10 Motor shaft 10a Shaft hole 11 Motor body 12 Magnet 13 Outer pipe 14 Guide 15 Upper Stop Plate 16 Lower Stop Plate 17 Photo Sensor 18 Brake Solenoid 19 Linear Guide Mechanism 20 Movable Part 21 Fixed Part 22 Guide Part 23 Linear Motion Motor 24 Cylinder Unit 25 Motor Shaft 25a Shaft Hole 26 Motor Main Body 27 Linear Guide Mechanism 28 Movable part 29 Fixed part 30 Guide part 31 Syringe 32 Piston
Claims (4)
前記モータを、外パイプ内に中心に丸孔が形成されたマグネットを直列状に配設せしめたモータ軸と、コイル部材を内装したモータ本体とを備え、前記コイル部材の励磁によりモータ本体に対してモータ軸を相対的に直線動作させるリニアシャフトモータで構成すると共に、
前記マグネットの丸孔を、モータ軸の軸心に沿って形成される軸孔として利用し、
該マグネットの軸孔に、下端部に液体の吐出口及び/又は吸入口となるニードル部が形成されたパイプ材を、前記外パイプの下端からニードル部を突出させて挿通固定し、該挿通固定したパイプ材を液体供給路に構成せしめ、
該パイプ材を、前記リニアシャフトモータの駆動にもとづいて、前記外パイプと共に上下方向に直線動作させることで、前記パイプ材内の液体を前記ニードル部から容器に吐出すべく構成したことを特徴とする分注機等における液体供給装置。 In the liquid supply apparatus in the discharge and / or dispensing device performs suction or the like of the fluid, when to linearly operate the liquid-supplying passage by driving the motor,
The motor includes a motor shaft in which a magnet having a round hole formed in the center in an outer pipe is arranged in series, and a motor body with a coil member installed therein, and the motor body is excited by the excitation of the coil member. And a linear shaft motor that relatively linearly moves the motor shaft,
Utilizing the round hole of the magnet as a shaft hole formed along the axis of the motor shaft,
A pipe member in which a needle part serving as a liquid discharge port and / or a suction port is formed at the lower end of the shaft hole of the magnet is inserted and fixed by protruding the needle part from the lower end of the outer pipe, and the insertion fixing Make the pipe material in the liquid supply path,
The pipe member, in accordance with the driving of the linear shaft motor, the outer pipe is thereby linearly moves in the vertical direction together, and characterized in that the liquid in the pipe and configured to discharge the containers from the needle portion liquid supply apparatus in the dispensing machine or the like to be.
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