JP3326764B2 - Angle rotor for centrifuge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in workability for extracting tubes in an angle rotor for a centrifuge.

[0002]

2. Description of the Related Art As a conventional angle rotor, Japanese Utility Model Application No.
The rotor filed under No. 28755 will be described with reference to FIGS. The angle rotor 60 has a rotor main body 61, a tube holding plate 62, and a rotor lid 63 as main constituent members. For easy understanding, the rotor main body 61 and the tube holding plate 62 are shown alone in FIGS. 5 and 6, respectively.

[0003] The rotor main body 61 is manufactured by cutting a block of an aluminum alloy or the like. The rotor body 61 has a center hole 65 formed at the bottom thereof for inserting the rotation shaft of the centrifuge, and a horn-shaped recess 64 formed coaxially with the center hole 65 at the upper surface thereof. A tube housing groove 67 is formed in a ring shape substantially perpendicularly to the tapered inner peripheral surface (also referred to as a tapered surface) 66 of the concave portion 64 along a circumference concentric with the center hole 65.

[0004] The tube holding plate 62 is made by spatula or press molding a metal plate such as aluminum or stainless steel, or by molding a synthetic resin material, and has a circular bottom surface located at the center of the concave portion 64 of the rotor body. 68 and a tapered surface 66 surrounding the circular bottom surface 68, and a disk portion 71 and a ring-shaped tapered flange 72 around the disk portion. The tapered flange 72 includes a sample tube ( A plurality of tube holes 73 for inserting and holding the (micro tube) 92 are formed along the circumferential direction. The tube holding plate 62 is fixed on the concave portion 64 of the rotor main body by a holding ring 74.

A ring-shaped holding member 75 is attached to the center of the circular bottom surface 68 of the recess with a bolt 76, and the screw on the inner peripheral surface of the holding ring 74 is attached to the screw on the outer peripheral surface of the holding member 75. Screw the tube holding plate 62
Can be pressed and fixed on the bottom surface 68 of the concave portion. A ring-shaped groove is formed coaxially on the bottom surface of the holding ring 74, and an O-ring 80 is attached to the groove.

A holding member 75 is provided on the tube holding plate 62.
A central hole 77 which engages with the outer peripheral surface of the first hole, and two small holes 78 are formed facing each other relatively near the periphery of the central hole 77. The small hole 78 is provided for the pin 7 planted on the bottom surface 68 of the recess.
9 to prevent rotation of the tube holding plate 62.
Note that a rotor fixing bolt 81 for fixing the rotor main body 61 to a motor shaft fitted into the center hole 65 is attached to the upper part of the axis of the rotor main body 61. The rotor lid 63 is attached to the rotor main body 61 by being screwed into a screw on the inner peripheral surface of the central holding member 75 as necessary.

[0007]

Conventionally, when a large number of sample tubes are inserted or removed from an angle rotor,
The cap or lip of the sample tube is picked and removed. When the centrifuged sample tube is removed from the rotor, the cap or lip of the sample tube is in close contact with the wall surface of the rotor, so that there is a problem that it is difficult to pick up and the workability is poor. In the case of research or inspection in which a large number of tubes are centrifuged, it takes a long time to extract the sample tubes, which has been a particular problem. That is,
In order to reduce the size of the motor of the centrifuge, the moment of inertia of the rotor must be minimized. In particular, angle rotors that hang a large number of sample tubes have a high degree of integration of tube holes in order to reduce the size of the rotor, so the spacing between tube holes is narrowed, making it difficult to pick up when removing sample tubes It is in. That takes time.

An object of the present invention is to solve these conventional problems and improve the workability of extracting a tube.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a groove is formed below or above a tube hole so that a finger can be easily hooked on a cap or a lip of a sample tube when the sample tube is pulled out from a hole of a rotor. Things.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. A tube extraction groove 66a is provided in a ring shape along the circumference concentric with the rotation center line L of the rotor below the tube hole 67 formed in the inner peripheral surface (tapered surface) 66, and the fingertip is the sample tube 9
The second lip goes under the lip so that it can be easily hooked on the lip. The tube extraction groove 66a may be provided above the tube hole 67, or may be provided on both sides.

FIG. 2 shows an angle rotor in which tube holes 67 are provided in two stages. The lower side of the lower tube hole,
A tube extraction groove 66a is provided between the upper and lower tube holes so that the fingertip can be easily hooked on the lip. According to the method shown in FIGS. 1 and 2, the purpose can be achieved at low cost only by forming the tube extracting groove 66a by lathe processing.

FIG. 3 shows a state in which a fingertip is put on each tube in order to simultaneously remove three tubes when the sample tube 92 is removed from the rotor 60 by forming the tube removal groove 66a. .

[0013]

According to the present invention, since the tube extracting groove is provided, the user can easily hook the fingertip on the lip of the sample tube and easily extract it from the rotor. Therefore, the workability of tube removal can be greatly improved as compared with the related art. At the same time, annoyance due to troublesome work can be prevented. Reducing annoyance due to troublesome work is an element that is increasingly demanded in the future.

When the distance between the sample tubes is small, the operator can simultaneously hook the fingertips on the lips of two or three sample tubes and simultaneously pull out a plurality of sample tubes, further improving workability. There are advantages too.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 shows a case where the tube spacing is narrow in FIG.
The top view of the principal part showing the state where a fingertip is hooked on a lip in order to pull out a tube of a book simultaneously.

FIG. 4 is a cross-sectional view of an angle rotor proposed in Japanese Utility Model Application No. 5-28755.

FIG. 5 is a sectional view of the rotor main body 61 of FIG.

6A and 6B are tube holding plates 62 of FIG. 4, respectively.
FIG.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 7-21137 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B04B 5/02

Claims (2)

(57) [Claims] A horn-shaped recess is formed on the upper surface concentrically with the rotation center line, and a plurality of tube holes are formed substantially at right angles to a ring-shaped tapered surface of the recess on a circumference concentric with the rotation center line. In an angle rotor for a centrifugal separator formed along, a tube extraction groove is formed in a ring shape along a circumference concentric with the rotation center line near a lower side or an upper side of the tube hole on the tapered surface. An angle rotor for a centrifugal separator, characterized in that: 2. A slash-shaped concave portion is formed on the upper surface concentrically with the rotation center line, and a plurality of tube holes are concentric with the rotation center line and have a radius substantially perpendicular to the ring-shaped tapered surface of the concave portion. In a centrifuge angle rotor formed in multiple stages along a plurality of different circles, near the lower side or the upper side of the tube hole of each stage of the tapered surface, a tube extraction groove is formed with the rotation center line. An angle rotor for a centrifuge, wherein the angle rotor is formed in a ring shape along the concentric circumference.