JPH07284695A - Rotor attaching and detaching system - Google Patents

Abstract

PURPOSE:To improve operability and reliability by facilitating displaying of correct tightening and receiving of reaction at the time of tightening in attaching and detaching of a rotor and attaching and detaching of a cover to and from the rotor. CONSTITUTION:This rotor attaching and detaching system is composed of a motor 21, a flexible shaft, a rotor supporting part 13, the rotor 3, the cover 4, a gap 10 and a torque display driver 7 having a reaction receiver 9. A mounting part 11 existing at the front end of the reaction receiver 9 is meshed with the cap 10 and a clamping part 12 is held by the hand and is inserted into the hexagonal hole of a screw 1. A torsion bar 15 is twisted when the torque in the tightening direction of the screw 1 is applied to the handle 14. A difference in rotating angle is then generated between an upper indicating part 16 fixed to the end of this bar and a lower indicating part 17 and is displayed on the torque display part 8. Next, the torque display driver 7 is removed and a centrifugal sepn. operation is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to attachment / detachment of a rotor and attachment / detachment of a cover of an ultracentrifuge of a type used in the field of biotechnology such as screwing a rotor.

[0002]

2. Description of the Related Art In the prior art, the screw 1 shown in FIG. 1 is tightened with a driver 2, and the tightening torque is a feeling of the hand, and the outer periphery of the rotor 3 is manually gripped in order to receive the reaction force of the driver 2 when tightening. Holding down. When the cover 4 is attached to or detached from the rotor 3, the outer periphery of the cover 4 is held by hand and rotated, and the cover screw 5 tightens and loosens it.

[0003]

Conventionally, the screw 1 shown in FIG. 1 is tightened with a screwdriver 2, and the tightening torque is a feeling of the hand. Due to lack of the tightening torque, vibration occurs at ultra-high speed rotation and rotation occurs. Occasionally there was a problem that I could not raise it and re-tighten.

Further, it is necessary to press the outer periphery of the rotor 3 by hand in order to receive the reaction force of the driver 2 when tightening, and this operation is difficult to perform because it is performed inside the bowl 6 of the ultracentrifuge. Further, when the cover 4 is attached to or detached from the rotor 3, the outer periphery of the cover 4 is held by hand and rotated to tighten or loosen the cover screw 5, so that it is difficult to loosen the cover screw 5 if it is too tight. The object of the present invention is to display the tightening torque in zones on the torque display portion 8 of the torque display driver 7 of FIG. 2 so as to eliminate the insufficient tightening torque and to show the reaction force applied to the rotor 3 to the torque display driver 7.
It is to improve the receiving operability by the reaction force receiver 9 attached rotatably to the. Further, the reaction force receiver 9 is used to facilitate the attachment / detachment of the cover 4 to / from the rotor 3.

[0005]

According to claim 1, the cover 4 is
A cover 4, a rotor 3, and a rotor support 13 are held by a grip portion 12 of a reaction force receiver 9 rotatably attached to a torque display driver 9 having a mounting portion 11 that meshes with a cap 10 fixed to the cover 10. The screw 1 can be tightened in the screw hole of the rotor supporting portion 13 by stopping the rotation of the screw and applying a tightening torque to the torque display driver 9. In this case, when torque is applied to the handle 14, the torsion bar 15 is twisted and a rotational angle difference related to the torque applied is generated between the upper indicator 16 and the lower indicator 17, and calibration is performed, so that a necessary and sufficient tightening force is obtained. It can be displayed on the torque display unit 8 When the rotor 3 is removed, if the torque in the loosening direction of the screw 1 is applied, the screw 1 can be removed from the rotor support portion 13 by the same operation as tightening, and the rotor 3 can be taken out from the bowl 6.

In the second aspect, the upper indicator 16 and the lower indicator 17 have the necessary and sufficient tightening force in the zone of blue or green color, or in the zone of white, black, red, etc. It can be displayed on the torque display unit 8 by indicating the range. In this case, one of the upper pointing portion 16 and the lower pointing portion 17 may be an arrow.

According to the third aspect of the present invention, the screw of the cap 10 is screwed into the screw hole of the cover 4 and tightened with a strong torque so that a fixing force larger than the necessary and sufficient tightening force of the rotor 3 is provided and the upper surface of the cap 10 has a two-sided width. And the like, it is possible to receive the reaction force by meshing with the mounting portion 11 attached to the reaction force receiver 9. A large fixing force can also be provided by applying an adhesive to the screw of the cap 10.

In the present invention, the convex portion 27 is provided below the upper indicating portion 16 and the screw 1 is provided at the opposite portion of the lower indicating portion 17.
This can be achieved by providing a playable concave portion 28 which can rotate in the tightening direction and cannot rotate in the loosening direction at the edge of the convex portion 27 or the playable concave portion 28.

According to the fifth aspect, it can be achieved by determining the dimensions of the wrench 19 and the reaction force receiver 9 so that the tip of the wrench 19 is always projected from the mounting portion 11.

In the sixth aspect, the cylindrical guide 29 having the inner diameter loosely fitted to the outer diameter of the cap 10 at the tip of the mounting portion 11 is used.
It is achieved by turning on.

According to the seventh aspect, it is achieved by bonding rubber to the tip of the mounting portion 11 or plasticizing the mounting portion 11.

According to the eighth aspect, it can be achieved by setting the grip portion 12 of the reaction force receiver 9 to have a dimensional relationship of projecting to the upper portion of the bowl 6 as shown in FIG.

In the ninth aspect, the rotor 3 is taken out from the ultracentrifuge by removing the screw 1, and the mounting portion 11 is engaged with the cap 10 in a state where the rotor 3 is independently fixed so as not to rotate and the grip portion 12 is provided. When torque is applied to turn the cover screw 5 in the loosening direction, the cover 4 rotates and the cover 4
Can be removed from the rotor 3. When the cover 4 is attached to the rotor 3, the reverse operation is performed.

According to the tenth aspect of the present invention, when the cover 4 is mounted on the rotor 3, a pin for stopping the rotation of the wrench 19 and the reaction force receiver 9 is made to work, and torque is applied to the handle 14 to use the torque display mechanism to move the cover 4 of the cover 4. Can be installed.

According to the eleventh aspect, it can be achieved by providing the grip portion 12 with a folding back lever. According to the twelfth aspect, it can be achieved by applying a stronger adhesive to the screw of the cap 10 than in the third aspect, or by tightening a stronger torque.

According to the thirteenth aspect, it is possible to achieve coaxiality by using a planetary gear mechanism as shown in the figure. In Claim 14, it is achieved by providing a wrench 19 or a ball pressed by a spring between the wrench 19 and the lower pointing portion 17 and a groove for receiving the ball.

[0017]

The gripping portion 12 protruding from the upper portion of the bowl 6 presses the rotation of the rotor 3 and the rotor supporting portion 13 to receive the reaction force, so that it is not necessary to put a hand in the bowl 6 and it becomes easier than before. Further, since the torque display driver 7 indicates whether or not the tightening torque is appropriate, it is possible to eliminate the insufficient tightening of the screw 1 when the rotor 3 is attached and to be psychologically secure. In addition, the proper torque can be more easily confirmed by using the zone display format. Further, by applying an adhesive to the screw of the cap 10, it is possible to prevent the cap 10 from being loosened by receiving a reaction force.
Furthermore, by minimizing the spring property in the loosening direction, a large loosening torque is required due to overtightening, the torsion angle of the torsion bar 15 becomes large, and shock due to rebound when the screw 1 suddenly loosens can be countered and the sample is disturbed. Can be prevented.
Further, it may be difficult to engage the mounting portion 11 with the cap 10 in the bowl 6, and it is much easier to insert the tip of the wrench 19 into the hole 18 of the cap, and the cylindrical guide has the same effect. . Further reaction 9
It is easier to attach / detach the cover 4 by using the method than directly holding the cover 4 by hand. Also, using the torque display gives a sense of security in attaching the cover 4. Overtightening does not occur. If it is too tight and does not loosen, it can be easily loosened by the folding lever. Furthermore, if a coaxial reduction mechanism is used, the torque applied when the cover 4 is tightened is small, and tightening is easy. Therefore, it can be loosened. Further, since the reaction force receiver 9 can be easily attached / detached, the cap 10 can be easily attached / detached and supplied at a low cost even in the case of the conventional rotor having no meshing mechanism.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows a conventional attachment / detachment system. Inside the ultracentrifuge 20, there is a motor 21 for driving the rotor 3 and a flexible shaft 22, on which the rotor support 13
Has arrived. The motor is suspended by a spring 23. A bowl 6 is provided above the motor 21, and a rotor 3 mounted on a rotor support portion 13 is provided in the bowl 6. By tightening a screw 1 with a torque to a driver 2, the rotor 3 is locked by the rotor support portion 13.
Is attached to. When torque is applied to the driver 2, the rotor 3, the rotor support 13 and the armature in the motor 21 rotate, so put a hand in the bowl 6 to press the outer diameter of the rotor 3 by hand and then apply torque. Since the bowl 6 is narrow, it was difficult to do it, and the torque was an instinct and sometimes it was not enough. At the time of rotation, the driver 2 is brought out of the bowl 6 and the door 23 is closed.

FIG. 2 shows the entire structure of the attachment / detachment system of the present invention. The motor 21, the flexible shaft 22, the rotor support 13, the rotor 3, the cover 4, which has a vibration system in which vibration occurs unless the screw 1 is closed with a necessary and sufficient torque,
It is composed of a torque display driver 7 having a cap 10 and a reaction force receiver 9. The mounting portion 11 at the tip of the reaction force receiver 9 is meshed with the cap 10 and the grip portion 12 is pressed by hand, and the wrench 19 is inserted into the hexagonal hole of the screw 1 and the handle 1
When a torque in the tightening direction of the screw 1 is applied to the torsion bar 15, the torsion bar 15 is twisted, and a rotation angle difference is generated between the upper indicator 16 and the lower indicator 17 fixed to the end of the torsion bar 15, and the torque indicator 8 is displayed. Is displayed. By indicating the necessary and sufficient torque range on the torque display portion 8, it is found that the necessary and sufficient tightening torque has been reached, and the tightening is stopped. Next, the torque indicating driver 7 is taken out of the ultracentrifuge 20 and the door 23 is closed. In the attachment / detachment system shown in FIG. 2, the tightening torque of the screw 1 is not insufficient, and vibration does not occur during rotation. At the same time, the insufficient tightening torque is displayed, so there is no need to worry about tightening. Also, put your hands in the narrow bowl 6
It becomes easier to receive the reaction force of the tightening torque as compared with pressing. When removing the rotor 3, the operation reverse to the above may be performed. A driver with a torque limiter may be used instead of the torque display driver 7.

FIG. 3 shows an example of a state where no torque is applied to the zone display of the torque display section 8 and a warning zone 24 such as red or black and a relief zone 25 such as green or blue are provided in a part of the upper instruction section 17. is there. In addition, the lower indicator 18 has a warning zone 24 and a safety zone 25 at the positions shown in FIG.

FIG. 4 is an example showing that the torque has become necessary and sufficient, and the relief zone 2 of the upper indicator 17 and the lower indicator 18 is shown.
Part 5 overlaps. The display shows that the tightening torque is sufficient if they overlap even a little, so it is easy to understand and gives a sense of security.

FIG. 5 shows an example of the cap 10 having a two-sided width 26 in one part, which is dimensioned to engage with the two inner sides of the mounting portion 11 facing each other. Hole 1 on the top of the cap
There is 8. The cap 10 is fixed to the cover 4, and it is natural that the cap 10 has a structure (adhesion, welding, mechanical fixing, etc.) whose fixing force can sufficiently withstand the reaction torque.

FIG. 6 shows an example of a structure which gives a minimum spring property in the loosening direction of the screw 1, and a convex portion 27 fixed to the upper indicator 16 is provided in the opposite portion of the lower indicator 17. The structure is such that when it enters a certain recess 28 and receives a tightening torque, it advances through the recess and hits the edge of the recess on the loosening side so that it cannot rotate.

FIG. 7 shows the cap 10 in the bowl 6 easily.
The relationship between the mounting portion 11 having the inner two-sided width and the wrench 9 is shown in a diagram of a method in which the wrench 19 is first inserted into the hole 18 of the cap to engage the two-sided width 26 and the mounting portion 11 with each other. Note that FIG. 7 also shows an example in which a soft protector 30 is attached to the tip of the mounting portion to prevent the cap 10 from being scratched. In addition, the mounting portion 11 itself may be made of plastic to prevent scratches.

In FIG. 8, the cap 10 is attached to the tip of the mounting portion 11.
A flat width 2 is provided with a guide 29 that fits loosely into the outer diameter of
6 is an example of a structure that facilitates the engagement of 6 and the mounting portion 11. FIG. 9 is a view showing a state in which the cover 4 is loosened in order to take out the sample from the rotor 3 taken out of the ultracentrifuge 20 after finishing the centrifugal separation work. Conventionally, the outer diameter of the cover 4 is gripped by hand and rotated to loosen the cover screw 5, but if torque is manually applied to the grip portion 12 in the state of FIG. 9, it can be easily held and easily loosened. It should be noted that loosening the cover screw 5 requires a much larger torque than when mounting the rotor 3 on the rotor support portion 13.
0 and the cover 4 need to be more firmly fixed, and an adhesive is used in combination, welding, brazing, mechanical joining, or the like is used.
Tightening of the cover 4 after putting the sample into the rotor 3 can be performed in the same state as in FIG. 9, and can be easily performed by applying a tightening torque to the grip portion 12. However, I have a suspicion about how much tightening torque should be given, and I still have anxiety. It is conceivable to incorporate a torque display mechanism in the grip portion 12, but it is costly. Therefore, FIG. 10 shows an example of a method of tightening the cover 4 using the handle 14 using the function of the torque display portion 8. Polygonal brim 31 on part of wrench 19
To provide. The same polygonal hole 32 is provided in a part of the hole into which the wrench 19 of the reaction force receiver 9 is inserted, the handle 14 is pulled up in the direction of the arrow 33, and the brim 31 is inserted into the polygonal hole 32 to receive the reaction force. 9 and the wrench 19 can be rotated by one body, and when used in the state of FIG. 9, the tightening torque of the cover 4 is displayed on the torque display portion 8. Of course, the required torque is displayed separately from when the rotor 3 is attached. The wrench 19
There are many methods for integrating the reaction force receiver 9 into one body, such as a method of taking out a fixing pin from the grip portion 12 to the lower instruction portion 17.

FIG. 11 shows an example in which the additional torque at the time of removing the cover is set to be larger than that at the time of mounting.
It is a method of attaching 5, 36. In this method, the auxiliary handle 35 cannot be used at the time of tightening, and a large torque can be produced when removing.

FIG. 12 shows an example in which the reaction force receiver 9 can be easily attached and detached.
A groove 40 is provided in a part of the wrench 19, and a small ball 37 pressed by a spring 38 provided in the reaction force receiver 9 is fitted in the groove 40. If you pull out the reaction force receiver 9 with a strong force, the small ball 3
7 is retracted, and the reaction force receiver 9 can be taken out from the wrench 19.
The spring 38 is fixed by screws 39.

FIG. 13 shows a speed reducer 4 coaxial with a part of the system.
3 is an example of a structure using 3. Hexagon wrench 41, reaction force receiving pin 42, reduction mechanism 43, planet gear 44, ring gear 45, pinion 46, torsion bar (B) 47, torque zone display mechanism 48, forward / reverse switching and ratchet mechanism 4.
9, handle 50, reaction force receiving grip portion 51, one-body rotating mechanism 5
2. It consists of a spring 53.

[0029]

According to the present invention, since the rotor does not have to be held in a narrow bowl, operability is improved, tightening torque can be optimized, safety is improved, and reliability is increased. Further, it is possible to easily read the proper tightening torque and prevent the cap from rotating with the cover and receiving a reaction force. Furthermore, when the rotor is removed, it is possible to prevent the torsion bar from being twisted and causing a sudden rotation shock, thereby preventing the sample from being disturbed. Further, the reaction force receiver can be easily attached to the rotor cover, and the operability is improved, and the reaction force receiver can be easily attached to the rotor cover and the operability is improved. Furthermore, it is possible to prevent damage to the contacting portion (cap) of the cover. Further, reaction force is received outside the centrifuge, and operability is improved. Further, the cover can be easily removed from the rotor, the shock is reduced, and the sample is less disturbed, so that the operability is improved. Further, since the cover can be tightened with an appropriate tightening torque, reliability is improved, and since the large diameter of the handle can be used when the effective diameter of the reaction force receiver is small, the cover can be easily attached and detached and the operability is improved. Furthermore, the operability is improved by coping with the fact that the cover cannot be loosened by centrifugal force or the like. Further, it is possible to improve reliability by preventing the cap from turning when the cover is removed and becoming impossible to remove. Furthermore, since the cover can be easily removed from the rotor, operability is improved. Further paid rotor (conventional product)
It is easy to apply to the rotor, and the operability of the already delivered rotor is improved.
The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a conventional attachment / detachment system.

FIG. 2 is a side sectional view of the entire configuration showing the attachment / detachment system of the present invention.

FIG. 3 is an explanatory diagram of zone display.

FIG. 4 is an explanatory diagram when a zone display proper torque is applied.

FIG. 5 is a perspective view of a cap.

FIG. 6 is a structural diagram providing minimum springiness.

FIG. 7 is a perspective view showing the relationship between a wrench and a reaction force receiving tip.

FIG. 8 is a perspective view of a guide.

FIG. 9 is a side view of a cover attachment / detachment work state.

FIG. 10 is an explanatory diagram showing a torque display when the cover is attached.

FIG. 11 is a top view of the auxiliary handle.

FIG. 12 is a sectional view of a reaction torque attaching / detaching mechanism.

FIG. 13 is a sectional view of a torque indicating wrench with a reduction mechanism.

[Explanation of symbols]

1 is a screw, 3 is a rotor, 4 is a cover, 5 is a cover screw,
6 is a bowl, 7 is a torque display driver, 8 is a torque display portion, 9 is a reaction force receiving member, 10 is a cap, 11 is a mounting portion,
12 is a grip portion, 13 is a rotor support portion, 14 is a handle,
Reference numeral 15 is a torsion bar, 16 is an upper indicator, 17 is a lower indicator, and 19 is a wrench.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinji Kido 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd. (72) Masaharu Aizawa 1060 Takeda, Katsuta-shi, Ibaraki Hitachi Koki Co., Ltd.

Claims (14)

[Claims] 1. A rotor attachment / detachment system in which a rotor is fixed to a rotor support portion of an ultracentrifuge by using screws, which has a reaction force receiver that can be attached to a cover of the rotor to stop rotation of the rotor. A rotor attachment / detachment system that uses an attachment / detachment tool that can indicate that the tightening force has been reached. 2. The rotor attachment / detachment system according to claim 1, wherein it is possible to indicate that the required tightening force has been reached in the zone. 3. The structure according to claim 1, wherein the cover is a separate component such as a cap having a fixing force larger than a necessary and sufficient tightening force of the rotor and a reaction force receiver can be attached thereto. The rotor attachment / detachment system according to 2. 4. The rotor attachment / detachment system according to claim 1, wherein the rotor attachment / detachment system has a structure having a minimum spring property in a direction of releasing the tightening of the rotor. 5. As a guide for mounting a reaction force receiver on the cover of the rotor, a central wrench protrudes from a mounting portion of the reaction force receiver and is inserted into a hole of a cap into which the wrench is inserted. The rotor attachment / detachment system according to any one of claims 1 to 4, wherein: 6. The rotor attachment / detachment according to claim 1, wherein a cylindrical guide is provided at a tip of a mounting portion of the reaction force receiver as a guide when the reaction force receiver is attached to the cover. system. 7. The rotor attachment / detachment system according to claim 1, wherein the tip of the mounting portion of the reaction force receiving member is made of a softer material so as not to damage the contacting portion of the cover. 8. The rotor attachment / detachment system according to claim 1, wherein the grip portion of the reaction force receiving portion is protruded above the upper surface of the bowl of the ultracentrifuge. 9. The rotor attachment / detachment system according to claim 1, wherein a reaction force receiver can be used for attaching / detaching the cover of the rotor. 10. The rotor attachment / detachment system according to claim 9, wherein a torque display mechanism is used when the cover is attached to the rotor. 11. The rotor attachment / detachment system according to claim 9, further comprising a reaction force receiver capable of increasing the additional torque when the cover is removed, compared to when the cover is attached. 12. The rotor attachment / detachment system according to claim 9, wherein the fixing force of the cap is made stronger than the removal torque of the cover. 13. The method according to claim 1, wherein the coaxial reducer is used to tighten with a small torque.
The rotor attachment / detachment system according to 2. 14. The rotor attachment / detachment system according to claim 1, wherein the reaction force receiver can be easily attached and detached.