JP3201755U - Angle rotor for centrifuge - Google Patents

Abstract

An object of the present invention is to provide an angle rotor for a centrifuge that can easily realize the configuration even with a small angle rotor, and that has a sampling tube insertion and extraction angle close to vertical and has good workability. A rotary shaft portion 2 having a motor shaft insertion hole 5 on a bottom surface 2a, a mortar-shaped tapered flange portion 3 integrally projecting on a peripheral edge of the rotary shaft portion, and a tapered flange portion. A cover portion 4 integrally extending obliquely downward from the periphery, an elongated round tube holding hole 6 on the tapered surface 3a of the tapered flange portion, and a major axis 6A of which is a radius of the rotor. The centrifuge angle rotor 1 was formed to penetrate in the direction. [Selection] Figure 5

Description

  The present invention relates to an angle rotor used in a centrifuge.

  The rotors used in the centrifuge are roughly classified into two types of rotors called “angle rotors” and “swing rotors”. The angle rotor is a rotor provided with a tube holding hole so as to hold the sample container at a required angle with respect to the rotation axis of the rotor, for example, 45 degrees. In this type of rotor, centrifugation is performed using, for example, a sampling tube made of polypropylene (sometimes simply referred to as a tube).

  As shown in FIG. 6, the sampling tube 50 has a substantially conical shape with a cylindrical sample container 51 extending to the tip of the bottom, and a peripheral edge for locking the centrifuge rotor at the upper end of the sample container 51. Generally, a contact portion 52 and a lid 53 that fits into the inner diameter portion of the peripheral edge contact portion 52 and prevents leakage of the sample are integrally provided. Sampling tubes sold by various companies have substantially the same shape, although the detailed dimensions such as the outer dimensions of the lid are different.

  As shown in FIG. 7, the hole diameter D61 of the tube holding hole 61 of the angle rotor 60 that uses the sampling tube 50 is slightly wider than the cylindrical portion outer diameter D51 of the sample container 51 of the sampling tube 50, The peripheral contact portion 52 at the upper end of the sample container 51 is configured to have an outer diameter D52 larger than the outer diameter D51 of the sample container 51, and the peripheral contact portion 52 of the sampling tube 50 is as shown in FIG. In addition, it is general that the angle rotor 60 is configured to be engaged with the opening peripheral edge (peripheral locking portion) 62 of the tube holding hole 61 of the angle rotor 60.

  By the way, when a large number of sampling tubes are inserted into or extracted from the angle rotor, the sampling tube is covered and removed. In this case, when the centrifuged sampling tube is extracted from the rotor, there is a problem that it is difficult to pick because the lid of the sampling tube is in close contact with the wall surface of the rotor, and workability is poor. In particular, in research and inspections in which a large number of sampling tubes are required to be centrifuged within a short predetermined time, the time required to extract sampling tubes is problematic in obtaining accurate data.

  Therefore, in order to solve the above problems, Patent Document 1 discloses a tube formed on the rotor so that a finger is easily placed on the lid of the sampling tube when the sampling tube is extracted from the tube holding hole of the rotor. An angle rotor for a centrifuge has been proposed in which a tube extraction groove is formed in a ring shape along the circumference concentric with the rotation center line of the rotor near the lower side or upper side of the holding hole.

JP-A-8-309232

  However, in the configuration described in Patent Document 1 described above, the ring-shaped groove to be formed must be a groove having a width of at least about 10 mm so that the tip of a finger can be inserted, In the case of a small angle rotor, it may be difficult to secure a portion where the groove is formed. Also, even if the finger is easily caught by the lid of the sampling tube due to the presence of the groove, the pulling direction is an angle of the tube holding hole formed in the angle rotor, for example, 45 degrees obliquely above, so never The angle was not easy to extract.

  The present invention has been made in view of the problems of the background art described above, and the object of the present invention is to easily realize the configuration even with a small angle rotor, and the insertion and extraction angles of the sampling tube can be realized. The object is to propose an angle rotor for a centrifuge that is nearly vertical and has good workability.

In order to achieve the above object, the present invention is an angle rotor for a centrifuge described in the following [1] to [5].
[1] An angle rotor for a centrifuge, characterized in that an elongated round tube holding hole is formed with its long diameter directed in the radial direction of the rotor.
[2] The long round tube holding hole is formed into a long round hole having a ratio of a short diameter to a long diameter (short diameter / long diameter) of 0.70 to 0.95, The centrifuge angle rotor according to [1] above.
[3] A rotating shaft portion having a motor shaft insertion hole on the bottom surface, a mortar-shaped tapered flange portion integrally projecting on the periphery of the rotating shaft portion, and obliquely downward from the periphery of the tapered flange portion Or (1) or (1), wherein the elongated round tube-holding hole is formed through the tapered surface of the tapered flange portion. [2] An angle rotor for a centrifuge according to [2].
[4] The upper peripheral surface of the oblong tube holding hole formed on the tapered surface of the tapered flange portion is formed at an angle of 90 degrees with respect to the tapered surface, and the lower peripheral surface of the tube holding hole is The angle rotor for a centrifuge according to the above [3], which is formed at an obtuse angle exceeding 90 degrees with respect to the tapered surface.
[5] An inner peripheral surface of the cover portion integrally extended obliquely downward from the peripheral edge of the tapered flange portion is formed at an angle of 90 degrees with respect to the tapered surface of the tapered flange portion, The centrifuge angle rotor according to [3] or [4], wherein the angle rotor is formed so as to be flush with an upper peripheral surface of the tube holding hole formed in the tapered surface.

  According to the above-described angle rotor for a centrifuge according to the present invention, the long round tube holding hole is formed with the long diameter thereof directed in the radial direction of the rotor. When the centrifuge is stopped, the inserted and supported sampling tube is supported by the oblong tube holding hole while standing in the vertical direction by its own weight. Therefore, it becomes easy to pick the lid of the sampling tube with a finger, and the extraction direction is also close to the vertical direction, so that the extraction workability is improved. In addition, since the tube holding hole, which has been circular in the past, is merely formed in an elongated round shape, the configuration can be easily realized even with a small angle rotor.

It is the perspective view which showed one Embodiment of the angle rotor for centrifuges which concerns on this invention. It is a top view of the angle rotor for centrifuges shown in FIG. It is sectional drawing of the part which follows the XX line of FIG. It is sectional drawing which showed the state which inserted and supported the sampling tube in the angle rotor for centrifuges shown in FIG. 1, and operated the centrifuge. It is sectional drawing which showed the state at the time of the stop of the centrifuge of FIG. It is the perspective view which showed an example of the sampling tube. It is a half-end view of the conventional angle rotor for centrifuges. It is the half cross section which showed the state which inserted and supported the sampling tube in the conventional angle rotor for centrifuges.

  Hereinafter, an embodiment of an angle rotor for a centrifuge according to the present invention will be described in detail with reference to the drawings.

  An angle rotor for a centrifuge (hereinafter sometimes simply referred to as “rotor”) 1 according to the present invention is integrally molded using a synthetic resin such as ABS resin, AS resin, polyvinyl chloride, polycarbonate, etc. The rotating shaft portion 2, the tapered flange portion 3, and the cover portion 4 are provided.

  The rotating shaft portion 2 of the rotor 1 is formed in a cylindrical shape as shown in FIG. 3, and a motor shaft insertion hole 5 is formed in the bottom surface 2a. Then, the motor shaft 10 is inserted into the motor shaft insertion hole 5 as shown in FIG. 4. For example, by screwing the nut 11 into the screw portion 10 a provided on the head of the inserted motor shaft, The rotor 1 is fixed to a motor (not shown), and the rotation of the motor is transmitted to the rotor 1. The outer diameter and the height of the rotating shaft 2 are formed such that the strength of the rotating shaft 2 is guaranteed when the centrifuge angle rotor 1 is rotated at a high speed.

  A mortar-shaped tapered flange portion 3 is integrally protruded from the periphery of the rotating shaft portion 2. A plurality (four in the illustrated embodiment) of tube holding holes 6 are formed at equal intervals in the circumferential direction on the tapered surface 3a of the tapered flange 3. The tapered surface 3a is formed, for example, as a 45 ° inclined surface, and the sampling tube 50 is inserted into the tube holding hole 6 formed in the tapered surface 3a as shown in FIG. It functions as an angle rotor that is held by and subjected to centrifugal treatment.

  The tube holding hole 6 formed in the tapered surface 3a is formed in a long round hole with the major axis 6A facing the radial direction of the rotor 1 as shown in FIGS. The tube holding hole 6 formed in a long round shape has a short diameter 6B slightly larger than the outer diameter D51 of the cylindrical portion of the sample container 51 of the sampling tube 50 to be inserted. It is formed slightly narrower than the outer diameter D52 of the contact portion 52. Moreover, the ratio of the minor axis 6B to the major axis 6A (minor axis / major axis) is 0.70 to 0.95, and more preferably 0.75 to 0.90. Is formed. Furthermore, the upper peripheral surface 6a of the tube holding hole 6 is formed at an angle of 90 degrees with respect to the tapered surface 3a, and the lower peripheral surface 6b of the tube holding hole 6 is tapered surface 3a as shown in FIG. Is formed on a surface close to the vertical direction with an obtuse angle exceeding 90 degrees. In addition, the said oblong shape said in this specification is used by the concept also including the ellipse shape which does not have a parallel part in the middle.

  The centrifuge is stopped by forming the tube holding hole 6 into an oblong hole as described above, and further by forming the lower peripheral surface 6b of the tube holding hole 6 on a surface close to the vertical direction. 5, the inserted sampling tube 50 is supported by the rotor 1 while standing in the vertical direction, and when the sampling tube 50 is removed from the tube holding hole 6 of the rotor 1, as shown in FIG. Since the finger is easily applied to the lid 53 of the sampling tube and the removal direction is also close to the vertical direction, the removal operation is easy. In addition, when the oval tube holding hole 6 is formed by a molding die, when forming a circular tube holding hole, the stepped portion of the mating surface between the molds hardly appears, and a rotor having a good appearance is created. can do.

  A cover portion 4 is integrally formed from the periphery of the tapered flange portion 3 obliquely downward. A donut-shaped sampling tube storage space 7 is formed inside the cover portion 4. At least the inner peripheral surface 4a of the cover portion 4 is formed at an angle of 90 degrees with respect to the tapered surface 3a of the tapered flange 3 and above the tube holding hole 6 formed in the tapered surface 3a. It is formed so as to be flush with the peripheral surface 6a. As a result, as shown in FIG. 4, when the rotor 1 is in operation, the sampling tube 50 inserted and supported in the tube holding hole 6 contacts the inner peripheral surface 4 a of the cover portion 4, and centrifugal force acts in a stable state. Will be.

  In the centrifuge angle rotor 1 according to the present invention configured as described above, the long circular tube holding hole 6 is formed with the major axis 6A directed in the radial direction of the rotor 1. The sampling tube 50 inserted and supported in the round tube holding hole 6 is supported by the long round tube holding hole 6 while standing in the vertical direction by its own weight when the centrifuge is stopped. . Therefore, it becomes easy to pick the lid 53 of the sampling tube with a finger, and the extraction direction is also close to the vertical direction, so that the extraction workability is improved. In addition, since the tube holding hole, which has been circular in the prior art, is only formed in an oval shape, the configuration can be easily realized even with a small angle rotor.

  In addition, as in the above-described embodiment, the rotor 1 is integrally molded using a synthetic resin as a material, and the configuration thereof includes a rotating shaft portion 2 having a motor shaft insertion hole 5 on the bottom surface 2a, and the rotating shaft portion 2 A mortar-shaped tapered flange 3 integrally projecting at the periphery, and a cover 4 integrally extending obliquely downward from the periphery of the tapered flange 3, the taper In the case where the elongated round tube holding hole 6 is formed through the tapered surface 3a of the hooked portion 3, the rotor can be made into a rotor having a very light weight and a small moment of inertia. The rotor can be performed in a short time and can easily centrifuge many sampling tubes in a short time.

As mentioned above, although embodiment of the angle rotor for centrifuges which concerns on this invention was described, this invention is not limited to the above-mentioned embodiment at all, It is possible to implement in a various different aspect.
For example, in the above-described embodiment, the rotor 1 is integrally molded using a synthetic resin as a material. However, the rotor may be formed by cutting a block such as an aluminum alloy. In addition, if the tube holding holes 6 have an oblong shape, the number and size thereof can be arbitrarily formed, and the tube holding holes 6 of various sizes are formed in two stages and three stages. It is good as a thing.

  The centrifuge angle rotor according to the present invention has good sampling tube extraction workability. Therefore, the centrifuge angle rotor is suitable for research and inspection in which a large number of sampling tubes are required to be centrifuged within a short predetermined time. Can be used.

DESCRIPTION OF SYMBOLS 1 Angle rotor for centrifuges 2 Rotating shaft part 2a Bottom surface of rotating shaft part 3 Tapered collar part 3a Tapered surface 4 Cover part 4a Inner peripheral surface of cover part 5 Motor shaft insertion hole 6 Oval-shaped tube holding hole 6A Tube holding Long diameter of the hole 6B Short diameter of the tube holding hole 6a Upper peripheral surface of the tube holding hole 6b Lower peripheral surface of the tube holding hole 7 Storage space 10 Motor shaft 10a Screw part 11 Nut 50 Sampling tube 51 Sample container 52 Peripheral contact part 53 Lid

Claims (5)

  An angle rotor for a centrifuge, characterized in that an elongated round tube holding hole is formed with its long diameter directed in the radial direction of the rotor.   2. The elongated round tube holding hole is formed into an elongated round hole having a ratio of minor axis to major axis (minor axis / major axis) of 0.70 to 0.95. An angle rotor for a centrifuge described in 1.   A rotating shaft part having a motor shaft insertion hole on the bottom surface, a mortar-shaped tapered hook part projecting integrally on the periphery of the rotating shaft part, and an obliquely downwardly extending from the periphery of the tapered hook part The centrifuge according to claim 1 or 2, wherein the elongated round tube holding hole is formed through the tapered surface of the tapered flange portion. Angle rotor for machine.   The upper peripheral surface of the oblong tube holding hole formed on the tapered surface of the tapered flange is formed at an angle of 90 degrees with respect to the tapered surface, and the lower peripheral surface of the tube holding hole is formed into a tapered surface. The angle rotor for a centrifuge according to claim 3, wherein the angle rotor is formed at an obtuse angle exceeding 90 degrees. An inner peripheral surface of the cover portion integrally extending obliquely downward from the peripheral edge of the tapered flange portion is formed at an angle of 90 degrees with respect to the tapered surface of the tapered flange portion, and is tapered. The angle rotor for a centrifuge according to claim 3 or 4, wherein the angle rotor is formed so as to be flush with an upper peripheral surface of the tube holding hole formed on the surface.

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