JPH09154833A - Agitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotate and agitate an agitating object sealed body, and safely and easily place/remove the agitating object sealed body on/from an agitator by arranging plural rotary body pieces at prescribed intervals on rotary shafts in respective plural rotary bodies. SOLUTION: An agitator 1 is provided with plural rotary bodies 3 to rotate an agitating object sealed body 5 by its frictional force by directly bringing at least its part into contact with the agitating object sealed body 5 and a driving mechanism which rotatably pivots its respective rotary shafts 3a and transmits rotational driving force of the same direction and the same rotating speed to the respective rotary bodies 3. In the respective rotary bodies 3, plural same-sized true disk-shape rotary body pieces 4 are respectively and eccentrically arranged at prescribed intervals on the rotary shafts 3a, and an exccentric condition is arranged so that a virtual line A connecting the center 4a of the respective rotary body pieces 4 becomes an oblique straight line by forming a prescribed angle θ to the rotary shafts 3a of the rotary bodies 3 and phases always coincide with each other between the whole rotary bodies 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a stirrer.

[0002]

2. Description of the Related Art A blood test is performed as one of clinical tests. Blood easily coagulates, and depending on the type of test, when the coagulated blood is applied to a testing device, an accurate test result cannot be obtained, which may cause a misdiagnosis. Therefore, in such a test, to prevent this, immediately before collecting the blood before the test, add an anticoagulant to the collected blood, and then stir the blood inclusion body containing this blood. The operation to do was essential. As a stirring operation, a standard method is to hold the blood inclusion in a hand and rock it a predetermined number of times (usually 20 times).

In many cases, however, the above-mentioned stirring operation is not carried out according to the standard method, and therefore the problem of blood coagulation cannot be completely solved. This is because the stirring method is manually performed by a person. That is, while the stirring operation is being performed, other work such as blood collection cannot be performed, and therefore the degree of dependence on the human labor force is extremely large and the individual who is suffering from a shortage of the labor force itself. Considering the circumstances of clinics and the like, it is practically inevitable that a part of the work will be cut off except for the work and the operation that may directly risk the life of the patient. It tended to be inadequate.

The final result of this is that blood is coagulated at the time of an inspection in a specialized inspection institution, which rarely leads to misdiagnosis immediately (usually The technologist and doctor have doubts about this, and the situation has led to the need for re-collection of the test blood for re-examination, causing the labor of the patient who is the blood sampler and the clinic on the side of the blood collection. It was a vicious cycle in which it became troublesome and increased labor shortage.

Therefore, in order to solve the above-mentioned problems, mechanization of the stirring operation is also partially performed. As the stirrer used for this purpose, a stirrer having a drive mechanism in which a plurality of rotating bodies for directly contacting and rotating the blood inclusion body and having a rotation shaft for transmitting a rotational driving force to each of the rotating bodies is used. The rotary body is rotatably supported by the main body and is integrally provided on the main body of the stirrer. It is eccentrically provided so as to be inclined with respect to the axis as a symmetrical position with respect to the core, and has a predetermined constant in a certain direction along the rotation axis on which the rotor body is provided. It is known that the distance from the axis of the rotating shaft to the central axis of each rotating body at that position gradually changes with a certain fixed interval, that is, the eccentricity gradually changes as the distance increases. Has been.

By using this conventional stirrer, for example, a blood inclusion body in which a cylindrical test tube or the like is used as a container is rotated at a constant speed in the direction along the circumference thereof, and both ends of the blood inclusion body are rotated. It is possible to oscillate up and down alternately in a constant cycle and also in a horizontal direction at a constant cycle, so that blood coagulation can be efficiently prevented and the accuracy of the test can be ensured.

[0007]

However, in recent years,
From the standpoint of simplification of blood collection work and prevention of pathogenic bacterial infection and virus infection, vacuum blood collection method has been widely adopted, and there is a special type of container for enclosing blood in adopting this vacuum blood collection method. Since it has come to be used, it often happens that sufficient stirring cannot be performed even with the conventional stirrer.

The blood-sealed container used in the vacuum blood collection system is designed such that the blood for collecting blood is preliminarily self-sucked into the container directly from the patient via an injection needle or the like without using a device such as a syringe. It is a vacuum state, and the blood suction port is completely sealed with a lid so that the vacuum state is maintained. Therefore, the adhesion of the lid to the blood suction port is extremely strong, and there is a problem that when the blood in the container after collection is taken out, the lid is peeled off, which makes it difficult to remove the blood. In order to eliminate this, the lid is usually provided with a device for easy removal. That is, in the case of a structure in which the lid body is screwed into the blood suction port, the lid body has a diameter considerably larger than the diameter of the blood supply port and a force is easily applied when screwing (a non-slip protrusion). Or a shape with a protrusion so that the cross section is not a perfect circle). Further, in the case of the structure in which the lid body is attached to the blood suction port, the lid body is configured to include the opening-use protruding piece whose edge portion extends in a claw shape.

Therefore, when the above-mentioned lid having a non-circular cross section is provided, the non-slip projections or protrusions of the lid or the unsealing projection slide while sliding in contact with the rotor of the stirrer. It was unable to keep up with the rotation, which impeded the rotation of the blood inclusions.

When using the above-mentioned conventional stirrer,
When placing a blood inclusion body on it or taking out the placed body, there is a risk that fingers etc. may be caught in the body of the rotating body and get caught between the adjacent bodies of the rotating body, which is extremely dangerous. Met.

Further, when a finger or the like is sandwiched between the adjacent rotating bodies, the agitator is contaminated by the bleeding from the affected area and the blood adheres to the blood inclusion body when the injury is caused by the bleeding. Therefore, there is a potential risk that the test results regarding the test blood may be adversely affected, which may lead to misdiagnosis. In addition, blood for inspection may spill from the blood inclusion body and contaminate the agitator.

[0012] These blood contaminations have conventionally been eliminated by wiping the contaminated portion with alcohol etc., respectively, but it is confirmed that it is possible to completely remove what has flowed into a narrow space of the stirrer. No, it could still be contaminated after wiping. Blood for testing may contain pathogens and viruses, and if the above-mentioned contamination is not completely eliminated, there is a possibility that contamination by pathogens and viruses may be expanded. As a result, the environment in which the stirrer was used was extremely dangerous.

The blood adhering to the stirrer can be prevented from directly adhering to other specimens by wiping it off. However, when the person handling the test blood suffers from the trauma as described above, it bleeds. Has a possibility that the blood may directly adhere to the blood inclusion body and may be mixed into the blood for inspection during the handling, so that the test result regarding the blood for inspection has an adverse effect such as a misdiagnosis. The danger of giving was still unavoidable.

The present invention has been made in view of the above points, and eliminates the above-mentioned conventional drawbacks, and surely rotates and stirs an agitated object enclosure containing an agitated object such as blood. In addition, it is possible to safely and easily place the inclusion body of the object to be stirred on the stirrer or remove it, without causing injury, etc. In the case of contamination with epidemiological contamination, etc., provide a stirrer capable of preventing contamination by the agitated material, and provide the agitated material for inspection such as blood for inspection. It is an object of the present invention to provide a stirrer that does not adversely affect the test result of an object to be stirred such as blood for inspection when it is used for stirring an object.

[0015]

SUMMARY OF THE INVENTION The present invention is a stirrer for stirring an object to be stirred by rotating the object-to-be-agitated enclosure in which the object-to-be-agitated is enclosed in a container. A stirrer provided with a plurality of rotating bodies that come into contact with each other and rotate, and a drive mechanism that rotatably supports the rotating shafts of the plurality of rotating bodies and that transmits a rotational drive force in the same direction to each rotating body. The gist of the stirrer is that it is composed of a main body, and each of the plurality of rotating bodies is provided with a plurality of rotating body pieces at a predetermined interval in a direction along the rotating shaft.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of a stirrer of the present invention. In the figure, 1 is a stirrer, 2 is a stirrer main body, 3 is a rotary body, 4 is a rotary body piece, and 5 is a sealed body of the object to be stirred. FIG. 2 is a view showing a mode of eccentricity of the rotor piece 4 in the rotor 3 of the agitator 1 shown in FIG. 1, and FIG.
The side view of the stirrer of (1) and (b) are plan views of the same.

In the stirrer 1 of the present invention, for example, as shown in FIGS. 1 and 2, at least a part of the agitator inclusion body 5 is in direct contact with the agitator inclusion body 5 so that the friction force between the agitator inclusion body 5 and the agitator inclusion body 5 is increased. A plurality of rotating bodies 3 for rotating the agitated object enclosure 5, and a rotating shaft 3a of each of the plurality of rotating bodies 3 are rotatably supported, and each rotating body 3 has the same rotation speed in the same direction. And a stirrer main body 2 having a drive mechanism 6 for transmitting a rotational driving force.
The rotary shaft 3a is provided with a plurality of disc-shaped rotary body pieces 4 of the same size which are eccentric to each other at predetermined intervals in the direction along the rotary shaft 3a. Center of 4 4
An imaginary line A connecting a is a straight line that forms a predetermined angle θ with respect to the rotation axis of the rotating body 3 and is oblique, and the rotation is stopped while each rotating body 3 is rotating. Even during this period, the rotating bodies 3 are provided so that all the rotating bodies 3 are always in phase with each other.

In the above construction in which the virtual line connecting the centers 4a of the respective rotary body pieces 4 is a straight line, the virtual straight line A
Exists on the projection line of the rotation axis 3a. Further, in the above-described configuration in which all the rotating bodies 3 are in phase with each other, the angle θ formed by the virtual straight line A and the rotating shaft 3a of each rotating body is the same in all the rotating bodies 3. ing.

In the above description, the fact that all the rotating bodies 3 are in phase with each other means that they are as shown in FIG. 3 (a sectional view taken along the line BB in FIG. 1).
For example, the rotation axis of the top apex T of the rotor piece 4 at the position S at an arbitrary fixed distance L from the end R of the rotor 3 is mutually related among all the rotors 3. 3a
It means that the vertical distances U from are in agreement. Where S
In the rotating body 3 in which the rotating body piece 4 does not exist at the position of,
A rotary shaft 3a is provided at a position S with a range V formed by the rotor piece 4 before and after the position S and a surface connecting the outer peripheries thereof to each other.
Rotating piece 4 at the position S with the cutting plane cut in the direction perpendicular to
Virtual.

In the above-mentioned embodiment, as shown in FIG. 1, the rotary member piece 4 is in the shape of a perfect disk, and each rotary member 3
The rotating bodies 3 are provided so that the rotating body pieces 4 in FIG.

Further, as shown in FIG. 2, a virtual straight line A connecting the centers 4a of the respective rotary body pieces 4 is a rotary shaft 3 of the rotary body 3.
It intersects at the position of a and its central portion P. Therefore, as the rotor 3 rotates about the central portion P of the rotor 3, the top positions of the upper surfaces of both ends of the rotor 3 are alternately the same in the vertical direction (arrow y direction in the drawing, the same in FIG. 1). In addition to swinging with the same amplitude, it also swings with the same amplitude alternately in the horizontal direction (direction of arrow x in the figure, the same in FIG. 1). This amplitude is performed in the same direction and in the same cycle in all the rotating bodies 3 in the same cycle. Of course, the rotation of the rotating body 3 is performed in the same direction and cycle in all the rotating bodies 3 in the rotating direction and the rotating cycle.

The rotating shafts 3a of all the rotating bodies 3 are detachably attached to the agitator body 2 and are rotatably supported. In order to detachably and pivotally support the rotary shaft 3a of the rotary body 3, the rotary shaft bearing portion 7 of the drive mechanism 6 in the agitator body 2 is attached.
In the supporting portion of the rotating shaft 3a on the side opposite to the side shown in FIG.
As shown in, the rotary bearing portion 8 can be divided into upper and lower parts, and the upper lid 9 can be attached and detached.

Further, FIG. 4 shows a drive mechanism 6 provided in the agitator body 2 in the above embodiment. The drive mechanism 6 includes a motor 10 and a gear 1 as shown in FIG. 4, for example.
1a, 11b, 11c, 11d, 11e. A power plug (not shown) is electrically connected to the motor 10 via a switch 12. The size, number, and combination mode of the gears are not limited to the mode shown in FIG. 4, and any mode may be used as long as the rotation body 3 can be rotated in the same direction. As a power source for operating the drive mechanism, either an AC power source or a DC power source may be used, and thus a DC power source space or a rechargeable DC battery may be provided instead of the power source plug.

In the present invention, the rotational speed of the rotating body 3 may be non-adjustable or adjustable by a speed adjusting mechanism, but it is preferable to be adjustable. In any case, whether the rotational speed of the rotating body 3 is adjustable or not adjustable, the speed may be constant or variable during the rotation of the rotating body 3, and may be changed. In such a case, for example, the rotation speed may be slow or the rotation may be temporarily stopped in one rotation cycle. However, if the speed of the rotating body 3 is fixed during a rotating operation while being fixed or adjusted to a certain set value, the drive mechanism 6 may have a simple device structure, which may cause a failure or the like. This is preferable because it can reduce the risk of

Contrary to the above, if the complexity of the device structure of the drive mechanism 6 does not matter, it may be preferable that the rotational speed of the rotating body 3 fluctuates from the viewpoint of improving the stirring efficiency. However, this point cannot be said to be uniform because it depends on the object to be stirred.

Further, in the present invention, the rotating bodies 3 do not necessarily have to rotate at the same speed, and the rotating speeds of the rotating bodies 3 may be different. That is, it is not necessary for the drive mechanism 6 to have a mechanism for transmitting the rotational drive force of the same rotational speed to each of the plurality of rotary bodies 3, and the rotary drive is performed so that the rotational speed is different for each rotary body 3. It may be a mechanism for transmitting power. In order to make the rotational speeds of the rotating bodies 3 different from each other, for example, the gears 11a, 11b, 11c,
It is possible to adopt a configuration in which the gear ratios of 11d and 11e are made different from each other.

However, if all the rotating bodies 3 are configured to rotate at the same speed, it is possible to prevent the inclusion body 5 to be stirred from jumping from the upper surface of the rotating body 3 to the outside of the stirrer 1. , As described in the above embodiment,
Since it is possible to make the phases of all the rotating bodies 3 always coincide with each other when the rotating bodies 3 are rotated or stopped, compared with the case where the phases of all the rotating bodies 3 are not matched, the agitated object enclosure The oscillating motion is relatively uniform and easy to control, and there is an advantage that the oscillating motion itself can be standardized easily when it is necessary to standardize it.

Contrary to the above, when the rotating bodies 3 are configured to rotate at different speeds, the rocking operation of the agitated object enclosure 5 can be a complicated operation.
When the standardization of the swinging movement itself is not taken into consideration, it may be possible to further improve the stirring efficiency as compared with the case where the phases of all the rotating bodies 3 are always matched. However, this point cannot be uniformly stated because it depends on the property of the material to be agitated, like the problem of whether or not it is better to keep the rotation speed constant.

In the present invention, the distance between the rotating body pieces 4 in one rotating body 3 is arbitrarily set in each of the rotating body pieces 4 as long as it is within the range shorter than the length of the agitated object enclosure. Yes, the intervals may be the same, some may be the same, or all may be different.

Further, regarding the relationship between the rotating bodies 3, the arrangement patterns (pitch and order thereof) of the rotating body pieces 4 may be the same, partly the same or different from each other. It may be either. That is, the pattern of the arrangement of the rotating body pieces 4 in each of all the rotating bodies 3 may be different, and therefore the intervals between the rotating body pieces 4 may be different, and even if there are portions having the same intervals. Well, or all intervals may be different.

However, if all the rotating bodies 3 have the same pattern (pitch and order) of the rotating body pieces 4, the rotating body 3 is installed only in one specific portion of the agitator body 2. The specifications are not used, and may be specifications compatible with a plurality of places. Therefore, no trouble is required during assembly at the time of manufacturing the stirrer, and also when the rotating body 3 is configured to be removable as will be described later, the rotating body 3 is also the same. There is an advantage that it does not take time because the mounting position is relatively limited when the is attached to the agitator body 2. Furthermore, when a plurality of spare rotating bodies 3 to be described later are prepared, the rotating body 3 of one type can be applied to a plurality of places. Since it requires only a small number of types, it is advantageous in terms of productivity since it does not require designing and manufacturing, and the total number of items to be prepared at all times is small, which is also preferable in terms of securing inventory space.

In particular, if the intervals between all the rotary body pieces 4 in each rotary body 3 are the same (that is, the thickness of each rotary body piece 4 is also the same), every other rotary body 3 is adjacent to every other rotary body piece 4. Since all the specifications of the rotating body 3 may be the same, only two kinds of specifications are required for the rotating body 3, which is further advantageous in terms of productivity and securing of inventory space described above. preferable.

In the present invention, the rotating body pieces 4 may be independently provided in a single rotating body with the rotating body pieces spaced apart from each other, and the size and shape thereof are arbitrary and are not necessarily the above. It is not necessary to have a perfect disc shape as in the embodiment. That is, even if the rotating body piece 4 has an elliptical shape,
Alternatively, it may have any other shape, and its size may be arbitrary for each of the rotating body pieces 4.

However, in terms of easy manufacture,
The rotating body piece 4 preferably has a simple shape such as a disk shape, and particularly preferably a perfect disk shape. If all the rotating body pieces 4 have the same shape and size in all the rotating bodies 3, the rotating body piece 4 is not designed to be used by being provided only in one specific portion of the rotating body 3. Since the specification can be adapted to a plurality of places, it does not take time and effort when assembling the stirrer, and when the rotating body piece 4 is configured to be removable as will be described later, the rotating body piece 4 is also attached to the rotating body 3 in the same manner. Rotating shaft 3
There is an advantage that it does not take time because the attachment position is not limited when attaching to a. Further, as will be described later, in the case where a plurality of spare rotating body pieces 4 are prepared, the rotating body pieces 4 of one type of specification can be applied to a plurality of places, so that the prepared rotating body pieces 4 can be used. Since the number of body pieces 4 required is small, it is easy to design and manufacture, and is advantageous in terms of productivity. In addition, the total number of items that should be prepared at all times is small, so the stock space is secured. However, it is preferable.

As described above, the rotator piece 4 may be, for example, an elliptical disk shape, and when the rotator piece 4 is an elliptic disk shape, it is slightly smaller in terms of manufacturing as compared with a perfect disk shape. Although there is a disadvantage, it is preferable in order to improve the stirring efficiency because the stirring operation can be changed by complicating the swinging movement as compared with the case of a perfect disc shape.

In the present invention, the movement of the object-to-be-agitated enclosure 5 when the agitator 1 is used in the case where only the rotating body piece 4 has an elliptical disk shape and the other specifications are basically the configuration shown in this embodiment. Is illustrated in FIG. As shown in the same figure, as the rotary member 3 rotates in the direction of arrow a in the figure, it rotates (rotates) in the direction of arrow b in the figure, and the circumference of the sealed body of substance to be stirred 5 is shown. Circular motion (revolution) in the direction along the arrow (direction of arrow c in the figure)
I do. In this way, a change is obtained in the rotational movement. The rotation direction of the rotating body 3 may be the opposite direction to the above.

If the rotating body pieces 4 are independently provided at a certain rotating body with the rotating body pieces 4 spaced apart from each other, there is a gap between the rotating body pieces. When placing the body on the rotating body or taking it out, a finger enters the gap, so it is possible to place and remove the body without directly touching the rotating body. There is no danger of being caught in the space, and it is safe, and the inclusion body for the object to be stirred can be easily placed and removed. Incidentally, it is of course preferable that the gap has a size larger than at least the size of the tip of the finger, but is not particularly limited in the present invention.

Further, in the present invention, it is not always necessary that all the rotating body pieces 4 are provided eccentrically with respect to the rotating shaft 3a in each rotating body 3, and some rotating body pieces 4 rotate. The rotator piece 4 is provided eccentrically with respect to the shaft 3a, and the rest is provided so that the rotary shaft 3a passes through the center 4a of the rotator piece 4.
May be provided on the rotating shaft 3a. Further, all the rotating body pieces 4 may be provided on the rotating shaft 3a in a non-eccentric state.

Furthermore, in relation to each other of the rotating bodies 3, in all the rotating bodies 3, all or some of the rotating body pieces 4 may be provided on the rotating shaft 3a in an eccentric state, Alternatively, in some of the rotating bodies 3, all the rotating body pieces 4 are provided on the rotating shaft 3a in a non-eccentric state, and in the remaining rotating body 3, all or some of the rotating body pieces 4 are provided. The rotary shaft 3a may be provided in an eccentric state, or all the rotary body pieces 4 in all the rotary bodies 3 may be provided in the non-eccentric state on the rotary shaft 3a.

As described above, in the present invention, if the distance between the rotating body pieces 4 in one rotating body 3 is shorter than the length of the object-to-be-agitated enclosure, the rotating body pieces 4 will be separated from each other. It is arbitrary, and the size and shape of the rotary body piece 4 are also arbitrary in any rotary body 3. At the same time, in each rotating body 3, even if all the rotating body pieces 4 are provided eccentrically with respect to the rotating shaft 3a, or some of the rotating body pieces 4 are eccentric with respect to the rotating shaft 3a. The rotary shaft 3a is provided and the rest is provided in the non-eccentric state on the rotary shaft 3a, or all the rotary body pieces 4 are non-eccentric in the rotary shaft 3a.
It may be provided in a. Therefore, in the present invention,
As in this embodiment, it is not always necessary that the virtual line A connecting the centers 4a of the respective rotating body pieces 4 is a straight line that is oblique to the rotation axis of the rotating body 3 at a predetermined angle θ. Absent.

That is, specifically, an imaginary line connecting the centers of the rotating body pieces 4 is not a straight line, and for example, a spiral line surrounding the rotary shaft 3a along the rotary shaft 3a (strictly speaking, a spiral line A polygonal line), or a polygonal line in which the rotation axis 3a exists on the projection line thereof, or a polygonal line having no regularity. However, either may be used.

In the whole rotating body 3, when a virtual line connecting the centers 4a of all the rotating body pieces 4 overlaps with the rotating shaft 3a, that is, all the rotating body pieces 4 rotate in a non-eccentric state. Axis 3
The present invention also includes the case of being provided in a. However, in this case, both ends are alternately rocked up, down, left and right in addition to rotating the agitated object enclosure 5 in the direction along the circumference thereof. In order to do so, the mode in which all the rotating body pieces 4 are in the shape of a perfect disk must be excluded.

The imaginary line connecting the centers of the rotating body pieces 4 does not become a straight line, and the rotating shaft 3 is formed along the rotating shaft 3a, for example.
When it is configured to have a spiral line surrounding a (strictly, a spiral broken line), even if all of the rotating bodies 3 are rotated at the same speed, the rotating body 3 is not covered during rotation. It is possible to change the rotation speed of the agitated material enclosure 5.

That is, specifically, for example, in the rotating body piece 4 within the range of the distance in the direction along the rotating shaft 3a and corresponding to the length of the object to be stirred enclosure 5, the center of the rotating body piece 4 The line connecting the 4a is at least 1 around the rotary shaft 3a.
The rotating body pieces 4 are arranged at an appropriate arbitrary interval so as to extend over the circumference, that is, the line connecting the centers 4a of the rotating body pieces 4 is a spiral line (strictly, a spiral line). When the rotating body pieces 4 are arranged at an appropriate arbitrary interval so that the cycle is at least equal to or less than the length of the agitated object enclosure 5, the rotating body 3 rotates at a specific speed without stopping. Even while continuing, the agitated object inclusion body 5 temporarily stops its rotation operation, and temporarily changes its rotation speed, or changes.

Therefore, with the above-mentioned structure, it is possible to allow the drive mechanism 6 to exhibit a similar function without having a special function for changing the rotation speed. Since the object-to-be-agitated enclosure 5 can be caused to perform not only the swinging operation but also the complicated rotating operation, it can be effectively used when the object to be stirred needs to be randomly stirred.

As described above, in the present invention, in the relationship among the rotating bodies 3, even if the rotating body pieces 4 have the same pattern (pitch and order), the rotating bodies 3 may have the same pattern. They may be the same or different from each other. In addition, in relation to each of the rotating bodies 3, in all of the rotating bodies 3, all or some of the rotating body pieces 4 may be provided on the rotating shaft 3a in an eccentric state, or In the rotating body 3 of all parts, all the rotating body pieces 4 are provided on the rotating shaft 3a in a non-eccentric state, and in the remaining rotating body 3, all or some of the rotating body pieces 4 are eccentric. May be provided on the rotating shaft 3a in a state, or all the rotating body pieces 4 in all the rotating bodies 3
May be provided on the rotating shaft 3a in a non-eccentric state.
Therefore, in the present invention, as in the present embodiment,
While each of the rotating bodies 3 is rotating and stopped, the rotating bodies 3 are provided such that all the rotating bodies 3 are always in phase with each other. You don't have to be.

That is, between any two or more rotating bodies 3, whether the rotating bodies are stopped or rotating, and in any case, even if the phases do not match at all. Well, or any 2 that is for a certain period of time, either when the rotor is stopped or when it is rotating
The two or more rotating bodies 3 may be configured so that their phases may coincide with each other.

In the present embodiment, as shown in FIG. 6, the rotator 3 has a virtual line A connecting the centers of the rotator pieces 4 which is a straight line, and the straight line A is predetermined with respect to the rotary shaft 3a. 6 (b) and 6 (c)], the angle θ is arbitrary. However, the angle θ is
Since the inclusion body 5 to be agitated placed on the larger the size within a range of not falling from the rotating body 3 during the operation of the agitator, the amplitude of the enclosure body 5 to be agitated can generally be increased. preferable. Of course, since the magnitude of the amplitude varies depending on the mode of the object-to-be-agitated enclosure 5, the amount of amplitude of the object-to-be-agitated enclosure 5 can be determined simply by the length of the rotating body 3, the diameter, and the above θ. Even if it is decided, it cannot be decided by itself,
Generally, the magnitude of θ that is generally preferable is 10 ° to 30.
°, particularly preferably 15 ° to 25 °. Although the present embodiment does not include the aspect of θ = 0 °, the present invention is not limited to the magnitude of θ.

It is preferable that the size of the rotating piece 4 is large because the value of θ can be increased. Of course, as described above, the agitated object enclosure 5 placed on the rotating body 3 is
The size of the rotor piece 4 is selected so that the size of θ is such that it does not fall from the top of the rotor 3 during operation of the stirrer.
In addition, it is necessary that the rotary body piece 4 does not come into contact with either the rotary body piece 4 or the rotary shaft 3a of the adjacent rotary body 3.

Further, in the present embodiment, as shown in FIG. 6, the virtual straight line A connecting the centers 4a of the respective rotary body pieces 4 is
Although the rotary shaft 3a of the rotary body 3 and the central portion P thereof cross each other, the present invention is not limited to this, and an embodiment in which the straight line A and the rotary shaft 3a do not cross is of course the present invention. included. Even if the straight line A and the rotary shaft 3a intersect, the crossing position is not necessarily the rotary shaft 3a.
It does not have to be at the central position of. However, as in the present embodiment, the virtual line A connecting the centers 4a of the respective rotary body pieces 4 becomes a straight line, and the straight line A and the rotary shaft 3a intersect at the central position of the rotary shaft 3a. If it is an aspect, as described above,
Since the swinging movement is regular, it is advantageous when the swinging movement itself of the object to be stirred enclosure 5 is standardized.

That is, if it is constructed as described above, all the rotating bodies 3 rotate at the same amplitude in the same direction and at the same period, and both ends of the rotating body 3 around the central portion P are centered. While swinging up and down (along arrow y in FIG. 2, still the same in FIG. 1) alternately with the same amplitude, it also swings horizontally (along arrow x in FIG. 1) alternately with the same amplitude. Therefore, if the object-to-be-agitated enclosure 5 is placed such that the central portion thereof is located at the central portion P of the rotating body 3, it is possible to perform agitation under uniform conditions in all directions of up, down, left, right, front and back, and rotation. Become. As a result, the rocking motion and the stirring efficiency can be specified based on a certain relational expression, and the specific stirring efficiency can be reproduced. Therefore, the agitated object enclosure 5
It is easy to standardize the swinging motion of the.

In this case, in practice, the agitated object enclosure 5 is not always exactly centered at the center P of the rotor 3.
It is not necessary to place the agitated object inclusion body 5 so as to be substantially in the central portion of the rotating body 3, and it is sufficient to place the agitated object inclusion body 5 in the position. Although it is easy to visually locate the object-to-be-agitated enclosure 5 at the substantially central portion of the rotating body 3, align the object-to-be-agitated enclosure 5 at a specific position other than the central portion of the rotating body 3. Is relatively difficult to see.

For this reason, the object-to-be-agitated enclosure 5 generally has a substantially constant diameter rather than an extremely substantially pyramidal shape having a large difference in diameter or a shape having an extremely large protrusion part. In light of the substantially cylindrical shape (the enclosing container itself is a cylindrical container), the straight line A and the rotating shaft 3a intersect at the central position of the rotating shaft 3a as in this embodiment. Is preferred.

If the object-to-be-agitated enclosure 5 has a substantially pyramidal shape or a shape having a projection on a part thereof, the rotating body 3
The object-to-be-enclosed 5 is placed on the rotating body 3 so that the average posture of the object-to-be-enclosed 5 placed on the rotating body 3 is as horizontal as possible.

Further, in the present embodiment, the rotating body pieces 4 of the rotating body 3 are arranged so as to be put into the respective rotating bodies 3 adjacent to each other, but in the present invention, the rotation of the rotating body 3 is not always required. It is not necessary to provide each of the rotating bodies 3 so that the body pieces 4 are put in each other to be in this state, and the rotating body pieces 4 of the adjacent rotating bodies 3 may be adjacent to each other.

However, in the case where the rotating bodies 3 are provided so that the rotating body pieces 4 are put into each other and brought into this state, even if the size (diameter) of the rotating body 3 is the same as that of the conventional stirrer, each rotating body 3 is rotated. Since the distance between the rotating shafts 3a of the body 3 can be further reduced, there is an advantage that the agitator 1 can be downsized. When the size of the stirrer 1 is fixed, the size (diameter) of the rotating body 3 can be increased even if the distance between the rotating shafts 3a of the rotating bodies 3 is the same as that of the conventional stirring machine. There is an advantage that the amplitude of the inclusion body 5 can be increased and therefore the stirring efficiency can be improved. Further, in order to achieve the same stirring efficiency as the conventional stirrer, the stirrer can be made smaller.

The advantage of being able to reduce the size of the stirrer is as follows. That is, since the conventional stirrer is large, it is impossible or difficult to bring it to a moving site such as a blood sampling vehicle, and therefore, at the moving site, a manual stirring operation of the specific stirred material such as the collected blood is still performed. Therefore, the problems mentioned at the beginning were caused, but the problem can be solved by making the stirrer small. If the blood sampler (the person who collects the test blood) is a person who is difficult to move, such as an in-hospital nurse, the blood sampler will go to the person to collect blood. Although it is necessary, at that time, it is impossible or difficult to carry with a conventional stirrer. Therefore, in the above case, the stirring operation of the collected blood etc. was still performed manually, but the stirrer is small. By doing so, carrying becomes convenient and a mechanical machine for stirring operation becomes possible, so that the problems mentioned at the beginning can be solved.

As described above, in order to bring the rotating bodies 3 into the rotating bodies 3 adjacent to each other so that the rotating body pieces 4 are inserted into each other, the rotating body pieces 4 of the plurality of rotating bodies 3 are arranged.
Using the rotating bodies 3 that are slightly offset for each rotating body 3 with respect to one end of the rotating shaft 3a and at least by the thickness of the rotating body pieces 4, these rotating bodies 3 are adjacent to each other. Stirrer main body 2 so that they are arranged in an order that they do not come
Rotatably pivot.

In the present invention, it is not essential that the rotating body 3 is detachably attached to the agitator main body 2, and even if the rotating body 3 is non-detachable to the agitator main body 2. Good. However, if the rotating body 3 is detachably attached to the stirrer body 2, when the stirrer 1 is contaminated by an object to be stirred such as blood that has spilled, the rotating body 3 is removed from the stirrer body 2 as described above. Dirt can be easily wiped off and the risk of contamination spread can be avoided.

In this embodiment, the rotating body 3 is configured to be attachable to and detachable from the stirrer main body 2, but the configuration mode for doing so is not limited to the configuration mode described above, In addition, although not particularly shown, for example, the portion corresponding to the rotary body bearing portion 8 is simply a through hole or a concave fitting hole, and the portion corresponding to the rotary bearing portion 7 is
The bottom end of the hole has a force to elastically push out in the direction opposite to the inserting direction of the rotating shaft 3a and retracts in the inserting direction of the rotating shaft 3a. Inserts one end of the rotary shaft 3a of the rotating body 3 into the rotary bearing portion 7 and pushes it in, then inserts the other end into the rotary bearing portion 8, and then presses the other end from the outside of the rotary bearing portion 8. Then, the position may be fixed or the like so that it can be attached.

Further, in the present invention, in addition to the structure in which the rotating body 3 is attachable to and detachable from the stirrer body 2, one or more kinds of rotating bodies 3 having different specifications can be prepared. . The rotating body 3 of different specifications means an arrangement pattern (any one or more of shape, size, thickness, arrangement order, arrangement pitch, etc.) of the rotating body pieces 4 with respect to the already provided rotating body 3. The rotating bodies 3 having different specifications are referred to. In the case of such a configuration, by using another rotating body 3 in which the size of the rotating body piece 4 is different depending on the form of the object-to-be-agitated enclosure 5, the distance between the rotating shafts 3a is kept constant. The swing amplitude of the object-to-be-agitated enclosure 5 can be changed as it is, whereby the stirring efficiency can be improved and the coagulation of blood in the object-to-be-agitated enclosure 5 can be reliably prevented. There is an advantage that the stirring efficiency of the object-to-be-enclosed enclosure 5 can be improved by using a stirrer that remains small without increasing the size.

Furthermore, in the above, a plurality of rotating bodies 3 are prepared for each specification, and the rotating body 3 is provided.
Can be made of wood and / or bamboo. A plurality of rotating bodies 3 are prepared for each specification, which means that the rotating body 3 has completely the same arrangement pattern (shape, size, thickness, arrangement order, arrangement pitch) of the rotating body pieces 4. It means that a plurality of specifications are prepared for each. With such a configuration, when the rotating body 3 is contaminated with an agitated object such as blood that has spilled, it is possible to discard it because there is a spare, and therefore it is not necessary to wipe it off. When it is discarded, even if it is incinerated, there is no risk of causing environmental pollution like plastic, so it is safe and harmless to prevent the expansion of pollution caused by the adherence of contaminated agitated substances such as blood. it can.

The structure in which the rotating body 3 is made of wood and / or bamboo material means that the rotating shaft 3a and the rotating body piece 4 constituting the rotating body 3 are formed.
If both are made of wood, or both are made of bamboo, and if the rotating shaft 3a is made of wood and the rotating piece 4 is made of bamboo, the rotating shaft 3
This includes all cases in which a is a bamboo material and the rotating piece 4 is made of wood.

In the present invention, the rotating body 3 is not limited to the above-mentioned wood and / or bamboo material, but may be, for example, plastic, rubber, metal, etc., or a composite or combination thereof. In particular, if the incineration and disposal of the rotating body 3 is not considered, the rotating shaft 3a of the rotating body 3 can usually be made of plastic, metal, or the like. In general, plastic, rubber or the like can be used as the rotating body piece 4, but at least the periphery is made of rubber or foamed plastic such as foam made of EVA (ethylene vinyl acetate) or the like. preferable.

In the present invention, a receiving member (not shown) for receiving an object to be agitated such as spilled blood may be separately laid on a portion of the agitator body 2 located below the rotating body 3. . In this way, the agitator body 2 itself is not contaminated by the spilled object to be agitated, and in order to keep the agitator 1 always clean, the aforesaid receiving material may simply be discarded and treated. Is preferred for complete protection from contamination. This receiving material is also preferably made of incinerable paper such as paper, preferably Japanese paper. Here, incinerable does not mean that it can be incinerated, but that it can be incinerated as described above, that is, it can be incinerated without fear of environmental pollution.

In the present invention, the rotating body 3 is, for example, shown in FIG. 6 along a side view (a) and a plan view (b) in a certain posture of the rotating body 3, and along the axis of rotation of FIG. Sectional view (c)
As shown by, the rotating body piece 4 is detachably attached to the rotating shaft 3a and is non-rotatably provided, and the rotating body piece 4 has the same rotation as the rotating body piece 4 provided with the rotating shaft insertion hole 13 at a predetermined position. It is preferable that a plurality of body pieces 4 are separately prepared for each position of the rotary shaft insertion hole 13.

With this structure, the rotating body piece 4
Even if a part of the rotor is damaged, it is sufficient to replace only the damaged rotor piece 4 without replacing the entire rotor 3, which is economically advantageous.

Specifically, for example, the rotating body piece 4 is the rotating shaft 3
It is detachable from a and is non-rotatable.
Further, the rotary shaft insertion holes 13 are provided at different predetermined positions so that the line A connecting the centers 4a of the rotary body pieces 4 is a straight line that is oblique to the rotary shaft 3a of the rotary body 3, and the same shape and the same size. The same rotary body piece 4 as the plurality of rotary body pieces 4 may be separately provided for each position of the rotary shaft insertion hole 13.

A plurality of rotary body pieces provided with rotary shaft insertion holes 13 at different predetermined positions so that the line A connecting the centers 4a of the respective rotary body pieces 4 is a straight line which is oblique to the rotary shaft 3a. 4 means that, in one rotating body 3, if the rotating body pieces 4 are provided at equal intervals, for example, in a plurality of rotating body pieces 4 of the same shape and the same size, the rotary shaft insertion holes provided in them. It refers to a combination of the rotating body pieces 4 in which the distance of 13 to the rotating shaft 3a gradually increases (or decreases) at equal intervals.

In order to dispose the rotating piece 4 so as to be attachable to and detachable from the rotating shaft 3a, for example, as shown in FIG.
As shown in (a), a rotary stopper 14 of, for example, a square disk shape is fixed at a position corresponding to the rotary body piece 4 of the rotary shaft 3a, except for a shape in which the cross section of the rotary shaft 3a cut perpendicularly is a perfect circle. A rotary shaft insertion hole 13 of the same shape and size as the rotation stopper 14 is provided at a predetermined position of the rotary body piece 4, and a projection 15 is provided on the outer circumference of the rotation stopper 14 and the rotary shaft insertion hole 1
The inner surface of 3 is provided with a concave strip 16 into which the projection 15 can be fitted,
The rotary shaft 3a can be manually inserted into the rotary shaft insertion hole 13 of the rotary body piece 4, but a structure in which the rotary shaft 3a is not easily separated can be adopted. In this case, if at least one of the rotation stopper 14 and the rotating body piece 4 is made of a material having a deformation recovery property such as plastic or rubber, the fitting of the projection 15 to the recess 16 is damaged. It is preferable because it can be performed smoothly and surely without fear.

The protrusions 15 of the rotation stopper 14 may be continuous protrusions along its circumference as shown, or may be fragmentary protrusions. Further, the recessed line 16 may have any shape as long as the protrusion 15 of the rotation stopper 14 can be fitted therein.

In addition to the above, for example, as shown in FIG. 7 (b), except a shape in which a cross section perpendicular to the rotary shaft 3a is a perfect circle at a position corresponding to the rotary body piece 4 of the rotary shaft 3a, for example, A ridge 17 having a square cross section and a width equal to the thickness of the rotary piece 4 is provided, while the rotary piece 4 is made of a material having the above-mentioned deformation recovery property, and a cross section of the ridge 17 is formed at a predetermined position. The rotary shaft insertion hole 13 of the same shape and the same size is provided, and the rotary shaft 3a is forcibly inserted into the rotary shaft insertion hole 13 of the rotary body piece 4 along with the expansion of the hole 13 to cut the ridge 17. It is also possible to adopt a configuration in which the rotating body piece 4 is fixed in a non-rotatable position.

Further, in the present invention, as shown in FIG. 8, the rotary body piece 4 has a recess or notch 18 extending in the axial direction along the thickness direction of the rotary body piece 4 on its outer peripheral surface. It may be formed. If the rotating body piece 4 is configured in this way, when the portion of the recess or notch 18 of the rotating body piece 4 passes through the lower surface of the sample 5 as the rotor 3 rotates, the recess or recess is formed. Since the sample 5 can be vibrated by dropping the sample 5 into the notch 18, the stirring efficiency can be improved, which is preferable.

It should be noted that the positions where the recesses or notches 18 are provided are arranged so that in FIG. 8 the rotor pieces 4 of each rotor 3 coincide with each other and the phases of the rotors 3 coincide with each other. Although provided, they do not necessarily have to coincide with each other in the present invention. Further, it is not necessary that the rotating bodies 3 match each other. The number of the recesses or notches 18 provided is not necessarily constant for each rotating body piece 4 or for each rotating body 3, but it is preferable that the number is the same for each rotating body piece 4. It is preferable that the rotors 3 are the same.

Further, in the present invention, a protrusion (not shown) may be provided on the outer peripheral surface of the rotating body piece 4 instead of the recess or cutout 18. The positions and the numbers of the protrusions may be the same as the recesses or the notches 18 described above. In the case where the outer peripheral portion of the rotating body piece 4 is provided with a projection instead of the recess or cutout 18, contrary to the case where the recess or cutout 18 is provided, the portion of the projection is the sample 5 When passing the lower surface of the sample 5, the sample 5 can be vibrated by being lifted by the protrusion and then falling again, so that the stirring efficiency can be improved as in the case where the recesses or notches 18 are provided. It is preferable because it can be improved.

Further, in the present invention, both of the recesses or notches 18 and the protrusions may be provided on the outer peripheral portion of the rotating body piece 4.

The stirrer of the present invention is effective mainly for suppressing the coagulation of blood, but it is not limited to this application and is used for stirring one or more liquids. Or mixing, mixing between liquid and powder, mixing powders with each other, etc., by rotating the enclosure in which the object to be stirred is agitated, or stirring and mixing the object to be stirred. Can be used for any purpose.

Further, another use of the stirrer of the present invention is for the purpose of stirring serum, preparation of control serum and the like in the medical field, and also for other fields such as cell growth and culture. It can be used for various purposes in various fields such as.

[0079]

Next, the operation of the stirrer according to the embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS. The object-to-be-agitated enclosure 5 placed on the rotating body 3 is rotated in the direction of arrow e in the figure as the rotating body 3 rotates in the direction of arrow d in the figure. The opening protrusion 51b of the lid 51a is positioned so as to enter the gap between the two rotary body pieces 4.

By rotating the rotating body 3 in the direction of arrow d,
As shown in FIG. 9, when the height of the upper surface of the rotating body piece 4 is the lowest on the left end side and the highest on the right end side in the figure, the posture of the agitated object inclusion body 5 is the lowest on the left end 5a side,
The right end 5b side is in the highest slanted state. At this time, although not particularly shown, when the agitated object inclusion body 5 on the agitator 1 is looked down from above the agitator 1, the agitated object inclusion body 5 is not rotated.
It is parallel to a. In this state, the unsealing projection 51b is inserted between the two rotary body pieces 4,
Neither the rotating body piece 4 nor the rotating shaft 3a is caught.

The rotating body 3 is further rotated and the phase thereof is shown in FIG.
As shown in 0, when the height of the upper surface of the rotating body piece 4 becomes horizontal, the agitated object enclosure 5 rotates without slipping as the rotating body 3 rotates, and its posture also becomes horizontal. Become. At this time, the agitated object enclosure 5 is in a state in which the left end 5a side is inclined to the back side of the paper and the right end 5b side is inclined to the front side of the paper. That is, although not shown, the object-to-be-agitated enclosure 5 on the agitator 1
When viewed from above the stirrer 1, the object-to-be-stirred enclosure 5 is in a state of being inclined with respect to the rotation shaft 3a. Even in this state, the unsealing projection piece 51b has two rotating body pieces 4a.
It is inserted in the space between the rotary body piece 4 and the rotary shaft 3a.

The rotating body 3 is further rotated and the phase thereof is shown in FIG.
As shown in FIG. 1, when the height of the upper surface of the rotor piece 4 is highest on the left end side and lowest on the right end side in the figure, the agitated object enclosure 5 rotates without slipping as the rotor 3 rotates. Then, the posture of the agitated object inclusion body 5 is in a diagonal state in which the left end 5a side is the highest and the right end 5b side is the lowest. At this time, although not particularly shown, the object-to-be-agitated enclosure 5 on the agitator 1
Looking down from above the stirrer 1, the object-to-be-stirred enclosure 5 is parallel to the rotating shaft 3a. Even in this state, the unsealing protrusion 51b is inserted between the two rotating body pieces 4 and is not caught by the rotating body piece 4 or the rotating shaft 3a.

The rotating body 3 further rotates, and the phase thereof is as shown in FIG.
As shown in FIG. 2, when the height of the upper surface of the rotating body piece 4 becomes horizontal again, the object-to-be-enclosed 5 rotates with the rotation of the rotating body 3 without slipping, and the object-to-be-enclosed is enclosed. The posture of 5 becomes horizontal again. At this time, the sample 5 is in a state in which the left end 5a side is tilted toward the front side of the paper surface and the right end 5b side is tilted toward the back side of the paper surface. That is, although not shown, when the agitated object enclosure 5 on the agitator 1 is looked down from above the agitator 1, the agitated object enclosure 5 is inclined with respect to the rotation shaft 3a. Even in this state, the unsealing projection piece 51b is inserted between the two rotating body pieces 4, and the rotating body piece 4 also has the rotating shaft 3a.
It is not caught in a either.

By repeating the above-mentioned operation, both ends 5a and 5b of the object-to-be-agitated enclosure 5 oscillate up and down alternately and oscillate left and right alternately.

If the angle θ formed by the imaginary straight line A connecting the centers 4a of all the rotary body pieces 4 in one rotary body 3 and the rotary shaft 3a is large, the swing amplitude becomes large,
Stirring efficiency is improved. If the rotating body 3 having a large rotating body piece 4 is used, the above θ can be increased.

[0086]

As described above, the stirrer of the present invention is capable of rotating a plurality of rotating bodies for contacting and rotating the enclosed body of the object to be agitated, and rotating shafts of the plurality of rotating bodies. And a stirrer main body having a drive mechanism that pivotally supports each rotary body and transmits a rotary drive force in the same direction to each rotary body, and each of the plurality of rotary bodies is provided with a predetermined interval in the direction along the rotary shaft. Since a plurality of rotating body pieces are provided, it has a function of rotating the enclosed body of the agitated object to agitate the agitated object, and a gap is provided between each of the rotating body pieces. Therefore, even if there is a protrusion, etc. on part of the object to be agitated, if the protrusion is positioned so as to be inserted into the gap between the rotating body pieces, the protrusion will not hinder rotation. Be sure to rotate the enclosure of the object to be stirred to remove the object to be stirred. It can be stirred to the minute.

Further, when the object-to-be-enclosed body is placed on the stirrer and taken out, it is possible to safely and easily carry out the placing and taking-out work without being injured by fingers being sandwiched by the rotating body. . Therefore, when the object to be stirred is a pollutant substance such as blood for inspection, it is possible to prevent the stirrer and the sealed container from being contaminated. If the object to be agitated is the test blood, the result of the test on the test blood is determined by the blood.
This has the effect of avoiding the risk of adverse effects such as misdiagnosis.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a conventional stirrer for preventing blood coagulation for inspection.

FIG. 2 is a perspective view showing an example of a stirrer of the present invention.

FIG. 3 is a view showing a mode of eccentricity of a rotary body piece in the rotary body of the agitator of FIG.

FIG. 4 is a diagram showing a structure of a stirrer main body of the stirrer of FIG. 1.

FIG. 5 is an explanatory diagram for explaining the operation of the object-to-be-agitated enclosure in the case where the rotary body piece has an elliptical disk shape.

6 is an explanatory diagram for explaining a rotating body of the stirrer in FIG. 1. FIG.

FIG. 7 is a diagram showing a specific example for making a rotating body piece attachable / detachable to a rotating shaft and non-rotatable.

FIG. 8 is a diagram showing an example in which a recess or cutout is provided in a rotary body piece.

FIG. 9 is a view for explaining the operation of one embodiment of the stirrer of the present invention.

FIG. 10 is a view for explaining the action of one embodiment of the stirrer of the present invention.

FIG. 11 is a view for explaining the action of one embodiment of the stirrer of the present invention.

FIG. 12 is a view for explaining the action of one embodiment of the stirrer of the present invention.

[Explanation of symbols]

1 Stirrer 2 Stirrer main body 3 Rotating body 3a Rotating shaft 4 Rotating body piece 4a Center of rotating body piece 5 Stirring object enclosure 6 Drive mechanism A A virtual straight line connecting the center of the rotating body piece θ The center of the rotating body piece Angle formed by connecting virtual straight line

Claims (1)

[Claims] 1. A stirrer for stirring an agitated object by rotating the agitated object encapsulating body in which the agitated object is enclosed in a container, for contacting and rotating the agitated object enclosed body. A plurality of rotating bodies, and an agitator main body provided with a drive mechanism that rotatably supports the rotating shafts of the plurality of rotating bodies and that transmits a rotational driving force in the same direction to each rotating body. Each of the rotating bodies is provided with a plurality of rotating body pieces provided on a rotating shaft at predetermined intervals in a direction along the rotating shaft.