JP3567187B2 - Stirring device for sample liquid, etc. - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a stirring device for effectively stirring a solution such as a sample liquid.
[0002]
[Prior art]
When agitating a sample liquid, for example, in a conventional stirring device, the tip of a straight nozzle is placed in a container containing the sample liquid, and the sample liquid in the container is stirred by suction and discharge of the sample liquid by the nozzle. ing.
[0003]
In a conventional stirring device, a container with a lid containing a sample liquid to be stirred is placed in a stirrer, the lid is opened, a magnetic stirrer piece is put in the container, and the container is rotated by rotating the sample liquid in the container. Is stirring.
[0004]
In a conventional stirring device, a container containing a sample liquid is placed on a manual stirring device, and the sample liquid in the container is stirred by applying vibration.
[0005]
Furthermore, in a conventional stirring device, a container containing a sample liquid is set in a centrifuge, and the sample liquid inside is stirred by applying a centrifugal force to the container.
[0006]
In a conventional stirring device, vibration is generated by transmitting ultrasonic waves to a container containing a sample liquid, and the sample liquid in the container is stirred by the vibration.
[0007]
[Problems to be solved by the invention]
However, in the conventional stirring device using a straight nozzle as described above, the sample liquid sucked by the nozzle is discharged downward with respect to the sample liquid in the container to be stirred, so that the stirring effect is not so large. I could not expect it.
[0008]
Further, in the conventional stirring device in which the sample liquid is stirred by the stirrer, it is necessary to remove the lid of the sealed container each time and then put the stirrer piece into the container. Furthermore, if the stirrer piece is placed in the container from the beginning, there is a problem that the production cost is high.
[0009]
Further, in the conventional stirring device using a manual stirring device, a device for generating rotation and vibration is required.
[0010]
In addition, in the conventional stirring device using a centrifuge, since a rotating device and a device for fixing the container are required, the number of parts increases, the manufacturing cost increases, and the installation location increases. .
[0011]
Further, in the conventional stirring device using ultrasonic waves, a circuit for generating ultrasonic waves and a device for transmitting vibration to the container are required, and thus there is a problem that the manufacturing cost is high.
[0012]
The present invention has been developed in view of the above points, and aims at solving the above-mentioned problems, simplifying the configuration, reliably stirring the sample liquid and the like, and reducing the manufacturing cost. It is an object of the present invention to provide a stirring apparatus for a sample liquid or the like, which can reduce the installation area and can be reduced in installation area.
[0013]
[Means to solve the problem]
Therefore, the present invention has the following configuration to achieve the above object. That is, the apparatus for stirring a sample liquid or the like according to claim 1 of the present invention is connected to the suction / discharge means capable of absorbing or discharging the solution such as the sample liquid and the suction / discharge means, and is erected. In some cases, the nozzle is formed so that the tip faces obliquely downward.
[0014]
Further, in the apparatus for stirring a sample liquid or the like according to claim 2 of the present invention, a pair of rails are erected at predetermined intervals on a base table, and a rack gear is provided so as to be able to move up and down along each rail. The motor mounts are erected along the respective rack gears, the motors are provided on the respective motor mounts, and the pinion gears provided on the rotating shafts of the respective motors are meshed with the respective rack gears, thereby rotating the respective motors. The plunger pump is arranged on a rail provided with the rack gear so that the rack gear moves up and down, and a suction or discharge operation is performed by the up and down movement of the one rack gear, and further, a nozzle communicating with the plunger pump Is provided so as to move up and down in conjunction with the up and down movement of the other rack gear, and the tip of this nozzle is formed so as to face diagonally downward.
[0015]
Further, the stirring device for a sample liquid or the like according to claim 3 of the present invention has the nozzle tip sealed so that the tip of the nozzle is formed so as to face obliquely downward. In addition, a hole is formed in a side surface near the front end.
[0016]
Further, the stirring device for a sample liquid or the like according to claim 4 of the present invention has the configuration according to claim 1, 2 or 3, wherein the center of the vertical axis of the nozzle has a distance L from the center of the cylindrical or polygonal container. 0 <L ≦ r (inner radius of cylinder or outer circumscribed radius of polygon) −the nozzle radius, and the angles α at which the sample liquid discharge direction from the nozzle is normal to the inner surface of the container are α ≠ 0 ° and α ≠ 180. °.
[0017]
Further, in the invention described in claim 5, the nozzle position is set at a desired position in the container so that a sample or the like can be sucked or discharged.
[0018]
[Action]
In the apparatus for stirring a sample liquid or the like according to the first aspect of the present invention, a nozzle formed so that a tip thereof is directed obliquely downward is immersed in a cylindrical container containing a solution such as a sample liquid, and suction / discharge means is provided. Then, the solution in the container is sucked by the nozzle, and the sucked solution is discharged into the container. By repeating the suction and the discharge, the solution generates a spiral flow along the inner wall in the circular container. The solution in the container can be stirred by the vortex flow.
[0019]
In the apparatus for stirring a sample liquid or the like according to the second aspect of the present invention, the container is placed on a base table which is vertically advanced from the nozzle as a starting point. The motor is driven to lower the rack gear, and the nozzle is also lowered. Then, the tip of the nozzle is shifted toward the inner wall while keeping the tip horizontal with the bottom of the container. When viewed from above, the tip of the nozzle is not perpendicular to the inner wall of the container. Thereafter, the tip of the nozzle is put into the solution in the container, the plunger pump is operated by the vertical movement of the rack gear, the solution in the container is sucked by the nozzle, and the sucked solution is discharged into the container. The solution generates a vortex along the inner wall of the container by repeating the suction and the discharge. The solution in the container can be stirred by the vortex flow.
[0020]
Alternatively, a container containing a solution such as a sample liquid is placed on a base table below the nozzle. Next, the motor on the nozzle side is driven to lower the rack gear, and the tip of the nozzle is immersed in the solution in the container. Then, the container is moved horizontally, and the tip of a nozzle formed so as to face obliquely downward is positioned on the inner wall side of the container. The solution may be poured into the container after placing an empty container below the nozzle as described above.
[0021]
After the above, the rack gear is lowered by driving the motor on the plunger pump side, and the plunger pump is suction-operated to suck the solution in the container with the nozzle. Subsequently, the motor is reversed to discharge the plunger pump, and the sucked solution is discharged from the nozzle tip into the container. By repeating this suction and discharge, the solution flows spirally along the inner wall in the container, and the solution in the container can be stirred.
[0022]
Further, in the sample liquid stirring device according to the third aspect, the tip of the nozzle is sealed, and a hole is formed in a side surface near the tip to suck and discharge the solution from the hole. The solution discharged from this hole naturally flows along the inner wall side of the container, and the solution in the container can be easily stirred.
[0023]
Furthermore, in the apparatus for stirring a sample liquid or the like according to the fourth aspect, by adopting the above-described configuration, the solution in the container can be more efficiently fluidized and stirred.
[0024]
Furthermore, in the invention described in claim 5, the nozzle can be set at an optimum position.
[0025]
【Example】
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
As shown in FIG. 1, reference numeral 1 denotes a sample liquid stirring device according to one embodiment of the present invention, and a suction / discharge means 2 for sucking or discharging a solution such as a sample liquid; It is constituted by a nozzle 3 which communicates with the discharge means 2 and whose tip is directed obliquely downward when standing.
[0026]
More specifically, in the stirring device 1, a pair of rails 5a and 5b are provided upright on the base table 4 at predetermined intervals. Rack gears 6a and 6b are provided so as to be slidable vertically along the rails 5a and 5b.
[0027]
Motor mounts 7a and 7b are provided upright along the rack gears 6a and 6b, and the motor mounts 7a and 7b are fixed to rails 5a and 5b. Motors 8a and 8b are fixed to the upper ends of the motor mounts 7a and 7b, respectively.
[0028]
Further, pinion gears 10a and 10b are fixed to the end portions of the rotating shafts 9a and 9b of the motors 8a and 8b, and the pinion gears 10a and 10b mesh with the corresponding rack gears 6a and 6b, respectively. By rotating each motor 8a, 8b, each rack gear 6a, 6b moves up and down.
[0029]
A plunger pump 11, which is an example of the suction / discharge means 2, is provided on the upper outer surface of the one rail 5a. The plunger pump 11 includes a body 12, a plunger 13, a slider 14, a nut 15, and a joint 16.
[0030]
The inside of the body 12 is formed to be hollow by being counterbored, so that the plunger 13 can slide in the up and down direction. A slider 14 is fixed to a lower end of the plunger 13, and the slider 14 has a connecting portion 14a in a horizontal direction, and is fixed to the rack gear 6a via the connecting portion 14a.
[0031]
Therefore, when the rack gear 6a is lowered, the plunger 13 is also lowered together with the slider 14, and when the rack gear 6a is raised, the plunger 13 is raised together with the slider 14. Thus, if the plunger 13 moves down together with the rack gear 6a, the plunger pump 11 performs a suction operation, and if the plunger 13 moves up together with the rack gear 6a, the plunger pump 11 performs a discharging operation.
[0032]
On the other hand, a support 17 connected to and fixed to the rack gear 6b is provided outside the other rail 5b, and the nozzle 3 is vertically supported on the support 17 via a bracket 18. The nozzle 3 can be moved up and down by the vertical movement of the rack gear 6b caused by the rotation of the motor 8b.
[0033]
The tip 3a of the nozzle 3 is bent so as to face diagonally downward. Therefore, the tip end port 3b of the nozzle 3 also faces obliquely downward. The nozzle 3 is connected to the body 12 of the plunger pump 11 by a joint 16 via a tube 19.
[0034]
In the sample liquid stirring device 1 having the above-described configuration, the cylindrical container 20 is placed on the base table 4 below the vertically provided nozzle 3 as shown in FIGS. Next, by driving the motor 8b to rotate the rotating shaft 9b clockwise, the rack gear 6b descends in the y2 direction, and in conjunction with this descending, the nozzle 3 also descends, and the tip 3a of the nozzle 3 enters the container 20. Stop descent in the state of being put.
[0035]
Further, the container 20 is horizontally moved to adjust the tip opening 3b of the nozzle 3 toward the inner wall 20a of the container 20 as shown in FIGS. 5 and 6, and the sample liquid is injected into the container. .
[0036]
After this, the other motor 8a is driven and the rotating shaft 9a is rotated counterclockwise to lower the rack gear 6a in the Y2 direction. In conjunction with this operation, the plunger 13 is also lowered, and the plunger pump 11 is suctioned. Perform the operation. By this operation, the sample liquid in the container 20 is sucked into the nozzle 3 from the distal end port 3b.
[0037]
Next, by rotating the motor 8a in the reverse direction and rotating the rotating shaft 9a clockwise, the rack gear 6a rises in the Y1 direction, and in conjunction with this operation, the plunger 13 also rises, and the plunger pump 11 performs a discharging operation. . The sample liquid in the nozzle 3 sucked earlier is discharged into the container 20 again. Due to the discharge of the sample liquid, the sample liquid in the container 20 flows spirally along the inner wall 20a together with the discharged sample liquid.
[0038]
By rotating the motor 8a forward and backward as described above, the plunger pump 11 repeats the suction and discharge operations, so that the sample liquid in the container can be smoothly stirred.
[0039]
As shown in FIGS. 7 and 8, the center of the vertical axis of the nozzle 3 is a distance L from the center of the cylinder or the polygonal container where 0 <L ≦ r (radius inside the cylinder or circumscribed radius inside the polygon) −nozzle radius Preferably, the angle α between the direction in which the sample liquid is ejected from the nozzle and the normal to the inner surface of the container is α ≠ 0 ° and α ≠ 180 °. By thus determining the positional relationship between the nozzle 3 and the inner wall of the container 20, the solution can be more effectively stirred.
[0040]
【The invention's effect】
As is clear from the above description, in the stirring apparatus according to the first aspect of the present invention, a solution such as a sample liquid put in a container is immersed in a nozzle formed so that a tip thereof is directed obliquely downward, and suction and suction is performed. By repeatedly sucking and discharging the solution by the discharging means and discharging the solution sucked from the nozzle, a vortex flow is generated in the container, and the solution can be easily stirred. In this way, the solution in the container can be effectively agitated by simplifying the structure, and the number of parts is small, so that the manufacturing cost of the apparatus can be reduced. Furthermore, it can be installed in a small area, and there is no generation of vibration during stirring.
[0041]
In the stirring apparatus according to the second aspect of the present invention, the rack gear is lowered by driving the motor on the nozzle side, and the nozzle provided on the rack gear can be moved up and down. By raising the nozzle once, placing the container under the nozzle, and lowering the nozzle again, the nozzle tip can be easily inserted into the container and set at a desired position. Further, the position of the nozzle tip opening with respect to the depth of the container can be easily adjusted. Further, by driving the other motor to move the rack gear up and down, it is possible to easily perform the suction and discharge operations of the plunger pump, and it is possible to stir the solution in the container effectively.
[0042]
In the stirring device according to the third aspect of the present invention, the tip of the nozzle is sealed, and a hole is formed in a side surface near the tip to suck and discharge the solution from the hole. By positioning the tip of the nozzle near the inner wall of the container and repeating suction and discharge operations by suction and discharge means such as a plunger pump, the solution discharged from the hole of the nozzle flows along the inner wall side and swirls into the container. A stream can be easily generated to stir the solution.
[0043]
In the stirring apparatus according to the present invention, the center of the vertical axis of the nozzle is a distance L from the center of the cylinder or the polygonal container at 0 <L ≦ r (radius inside the cylinder or circumscribed radius inside the polygon) -nozzle The angle α, which is the radius and the direction in which the sample liquid is ejected from the nozzle and is normal to the inner surface of the container, is α ≠ 0 ° and α ≠ 180 °, so that the solution in the container flows more efficiently. Can be stirred.
[0044]
In the stirring apparatus according to the fifth aspect of the present invention, the nozzle position can be adjusted to be optimal for suctioning and discharging the container liquid.
[Brief description of the drawings]
FIG. 1 is a simplified longitudinal sectional view of an embodiment according to the present invention.
FIG. 2 is a plan view of a cylindrical container.
FIG. 3 is a side view of a cylindrical container.
FIG. 4 is a perspective view showing a tip portion of a nozzle.
FIG. 5 is a plan view showing a state where the tip of the nozzle is inserted into a cylindrical container.
FIG. 6 is a longitudinal sectional view showing a state where the tip of the nozzle is inserted into a cylindrical container.
FIG. 7 is an explanatory view when the tip of the nozzle is inserted into a cylindrical container.
FIG. 8 is a partially cutaway longitudinal sectional view in which the tip of a nozzle is inserted into a cylindrical container.
[Explanation of symbols]
Reference Signs List 1 Stirring device for sample liquid 2 Suction / discharge means 3 Nozzle 4 Bases 5a, 5b Rails 6a, 6b Rack gears 7a, 7b Motor mounts 8a, 8b Motors 9a, 9b Rotary shafts 10a, 10b Pinion gears 11 Plunger pump 12 Body 13 Plunger

Claims (4)

A pair of rails are erected at predetermined intervals on a base table, rack gears are provided so as to be able to move up and down along the rails, and a motor mount is erected along each rack gear. A motor is provided on each mounting base, and a pinion gear provided on the rotation shaft of each motor is meshed with each rack gear so that the rack gear moves up and down with the rotation of each motor, and A plunger pump that performs suction or discharge operation by vertical movement is provided on the rail provided with the rack gear, and a nozzle communicating with the plunger pump is provided so as to move up and down in conjunction with the vertical movement of the other rack gear, In addition, a stirring device for a sample liquid or the like in which the tip of this nozzle is formed so as to face obliquely downward. Instead of the configuration of the nozzle according to claim 1, wherein the tip of the nozzle is formed so as to face obliquely downward, while sealing the tip of the nozzle, a hole is formed in a side surface near the tip, and the sucked solution is removed. 2. The stirring device for a sample liquid or the like according to claim 1, wherein the stirring device can be discharged in a horizontal direction. The distance L from the center of the vertical axis of the nozzle to the center of the cylinder or polygonal container is 0 <L ≦ r (radius in the cylinder or circumscribed radius in the polygon) −nozzle radius, and the direction of discharging the sample liquid from the nozzle is the container. 3. The apparatus according to claim 1, wherein an angle α between the inner surface and a normal is α ≠ 0 ° and α ≠ 180 °. 4. The stirring device for a sample liquid or the like according to claim 1, wherein the nozzle tip position is set at a desired position in the container so that a sample or the like can be sucked or discharged.

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