JPH11193092A - Device for unplugging blood sampling tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and rapidly open a plug even when it is a plug with a recessed part at the center of its top face and to additionally miniaturize it. SOLUTION: An unplugging device for removing a plug 6 from a blood sampling tube main body 5 of a plugged blood sampling tube 7 has a rotating shaft 1 and a plug opening member 2 fitted on the rotating shaft 1 so as to rotate it with the rotating shaft 1 and the unplugging member 2 has the first and the second nail parts 3 and 4 being brought into contact with the side face of the plug 6 and the plug is removed by bringing successively the first and the second nail parts 3 and 4 into contact with the side face of the plug 6 accompanied with the rotating shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening device for removing a plug of a blood collection tube used in a clinical test, for example, and more particularly, to an opening member having first and second claws. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood collection tube opening device capable of easily opening a blood collection tube plug by being rotated and contacting the stopper in order.

[0002]

2. Description of the Related Art In a clinical test, the following pretreatment process is performed before a blood sample put in a blood collection tube is supplied to a clinical test device. First, centrifuge to separate blood into serum or plasma and solids, then remove the plug of the blood collection tube, and dispense the blood sample in the blood collection tube into one or more containers according to the test contents. I do.

[0003] At the site of a clinical test, it is desired to process a large number of blood collection tubes at once to improve workability. Therefore, it is strongly required that the plug is automatically removed by a machine regardless of the inspection worker's hand in the plug opening step.

Conventionally, various devices have been proposed as devices for opening a blood collection tube. For example, a device in which a rod is brought into contact with a plug of a blood collection tube from the side, and the plug is pushed obliquely upward by the rod to remove the plug, or JP-A-6-2
As disclosed in Japanese Patent No. 78793, an apparatus has been proposed in which an arm-shaped opening member that holds the stopper from both sides is used, and the stopper is pulled upward while swinging the opening member.

[0005]

However, in the device for removing the plug by contacting the rod from the side of the plug and pushing the plug obliquely upward, a large space is required around the blood collection tube. There was a problem that the plug device became large. Also, as in Japanese Patent Application Laid-Open No. 6-278793, an apparatus in which an arm-shaped opening member is brought into contact with both sides of the stopper and the arm-shaped opening member is swung to pull out the stopper has a problem that the processing speed is slow. there were.

Further, the opening apparatus described in Japanese Patent Application Laid-Open No. 6-278793 requires a special driving device for moving the blood collection tube leaning against the rack upward, and the opening apparatus is large in view of this point. And the cost is high.

Further, in recent years, a recess has been provided in the center of the upper surface of the stopper in order to facilitate injection of a drug solution using a syringe needle or the like.
A plug with a thin central portion is frequently used. In this type of stopper, when an external force is applied from the side, the upper part of the stopper is deformed, so that a plug opening device that makes the rod abut from the side or as disclosed in JP-A-6-278793. In addition, in an opening device in which an arm is brought into contact with both sides of a stopper, an upper portion of the stopper is deformed, and the stopper may not be able to be smoothly removed from a blood collection tube.

[0008] An object of the present invention is to provide a blood collection tube opening device which can be easily and quickly opened even if the stopper has a recess at the center of the upper surface, and which can be downsized. To provide.

[0009]

The invention according to claim 1 is an opening apparatus for removing a plug from a closed blood collection tube, wherein the rotation shaft and a rotation shaft are arranged to rotate together with the rotation shaft. An opening member having a pawl portion attached to the side surface of the plug and having a pawl portion, and a driving device for driving the rotary shaft to rotate, the pawl portion, with the rotation of the rotary shaft,
The plug is configured to be brought into contact with the side surface of the plug to be removed.

According to the second aspect of the present invention, the plug opening member has the first and second claws which are sequentially brought into contact with the side surfaces of the plug, and the center of the rotation axis at the tip of the first claws. Is shorter than the distance between the tip of the second pawl and the center of the rotating shaft. In addition, only one claw part may be provided in the opening member.

According to a third aspect of the present invention, there is provided an apparatus for opening a blood collection tube, comprising: a base plate; and a pair of holding members erected on the base plate, wherein a distance between the pair of holding members is plural. The width is equal to or slightly larger than the width of the rack containing the blood collection tubes.

According to the fourth aspect of the invention, the first to third aspects are provided.
The blood collection tube opening device according to the above, further comprising a pair of rotation shaft support members attached to the base plate, wherein the rotation shaft is rotatably supported by the rotation shaft support members.

In the plugging device for a blood collection tube according to the present invention, a plurality of plugging members may be attached to the rotating shaft. Further preferably, as set forth in claim 6, the plurality of opening members are attached to the rotating shaft so as to be able to rotate with the rotating shaft, but movably in the axial direction of the rotating shaft, A ring having a length corresponding to the distance between the opening members is inserted between the opening members around the rotation shaft.

[0014] More preferably, as set forth in claim 7, the plurality of opening members are integrally formed so that the pawl portion is formed so as to extend in the longitudinal direction of the rotating shaft.

According to the present invention, in order to remove blood adhering to the claw portion, a roller arranged so that its outer surface is in contact with the outer surface of the claw portion that has been rotated is provided. Further provided.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to non-limiting examples of the blood collection tube opening device of the present invention.

FIG. 1 is a front view for explaining the basic structure and principle of the blood collection tube opening device according to the present invention. As shown in FIG. 1A, the blood collection tube opening device according to the present invention includes a rotating shaft 1 and an opening member 2 fixed to the rotating shaft 1 so as to rotate with the rotating shaft 1. The plug opening member 2 has first and second claws 3 and 4. The tips 3a and 4a of the first and second claws 3 and 4 are sequentially brought into contact with the side surfaces of the plug 6 of the blood collection tube 7 with the rotation of the rotating shaft 1, and the plug 6
Is removed from the blood collection tube body 5.

FIG. 2 is an enlarged view showing details of the opening member 2. The opening member 2 has a structure in which first and second claws 3 and 4 are integrally provided on an outer peripheral surface of a ring-shaped portion 2 a fixed to the rotating shaft 1. The first claws 3 and the second claws 4 are provided at positions about 180 ° apart in the ring-shaped portion 2a.

The first claw portion 3 is connected to the ring-shaped portion 2a, and has a base end 3b extending radially outward of the ring-shaped portion 2a, and extends laterally from the tip of the base end 3b. And a side projection 3c. The tip 3a of the side protrusion 3c
Are sharpened and come into contact with the stopper 6. Note that the second claw portion 4 also has a base end portion 4b and a side protruding portion 4 similarly.
c so that the tip 4 a of the side protruding portion is in contact with the side surface of the plug 6.

The outer peripheral edges 3d and 4d of the first claw portion 3 and the second claw portion 4 shown in FIG. 2 are each shaped to draw an arc centered on the center of the rotating shaft 1. In this structural example, the center of the rotation shaft 1 and the tip 3 of the first claw 3
The distance B between the center of the rotating shaft 1 and the tip 4a of the second pawl 4 is longer than the distance A between the first and second pawls 4a.

By rotating the opening member 2 having the first and second claws 3 and 4 together with the rotating shaft 1, FIG.
The plug 6 is removed from the blood collection tube main body 5 as shown in FIG. This will be described with reference to FIGS.

In FIG. 1, the rotating member 1 is rotated counterclockwise. First, as shown in FIG.
The tip 3a of the first pawl 3 is in contact with the side surface of the head 6a of the plug 6. When the rotating shaft 1 is further rotated in the counterclockwise direction, the side surface of the head 6a of the plug 6 is pushed by the tip 3a of the first claw portion 3, and as shown in FIG. Although it is not possible to remove it from the blood collection tube main body 5, the tip 3a
The side that is abutted will be caused. As a result, the side surface of the insertion portion 6b connected to the head 6a of the plug 6 is exposed.

Next, by further rotating the rotating shaft 1 in the counterclockwise direction, the tip 4a of the second claw 4 is brought into contact with the side of the plug 6, especially the side of the insertion portion 6b into which the blood collection tube main body 5 is inserted. (FIG. 1 (c)). Further, by rotating the rotating shaft 1 counterclockwise,
As shown in (d), the stopper 6 is removed from the blood collection tube main body 5.

As described above, when the plugging member 2 is used, the plug 6 can be easily and quickly removed from the blood collection tube main body 5 simply by rotating the plugging member 2 together with the rotating shaft 1. Since the stopper member 2 removes the stopper 6 from the blood collection tube 7 as described above, the stopper member 2 is preferably made of a member having a certain degree of rigidity, and can be made of metal or hard plastics. Preferably, the stopper member 2 is made of stainless steel because contamination by blood or the like hardly occurs and the adhered blood or the like can be easily removed.

Next, FIGS. 3 and 4 show an example of the entire structure of the blood collection tube opening device according to the present invention provided with the opening member 2 described above. In the blood collection tube opening device 11, the base plate 12
The plates 13 and 1 as a pair of rotating shaft support members are
4 are erected. Rotating shaft 1 between plates 13 and 14
And the rotating shaft 1 is rotatably supported. The structure for rotatably supporting the rotating shaft 1 is not particularly limited. That is, a through-hole into which the rotating shaft 1 can be fitted is formed in the plates 13 and 14, and the rotating shaft 1 is inserted through the through-hole, or a bearing is formed in the through-hole, and the rotating shaft 1 is rotated from the bearing. It is possible to adopt a structure for supporting the apparatus as possible.

A gear 15 fixed to the rotating shaft 1 is attached to the outside of the plate 14 so as to rotate with the rotating shaft 1. On the other hand, a motor 16 as a driving device is arranged on the base plate 12 in a region between the plates 13 and 14. Rotary shaft 16 of motor 16
a extends from the through hole 14a provided in the plate 14 to the outside of the plate 14, and a gear 17 is fixed to the tip of the rotating shaft 16a. The gear 17 has a rotating shaft 16
It is attached to the rotating shaft 16a so as to rotate together with a.

On the other hand, a belt 18 is stretched between the gear 17 and the gear 15. The belt 18 is a motor 1
6 is used to transmit the rotational driving force to the gear 15.

That is, the gears 15 and 17, the belt 18, and the motor 16 constitute a driving device for driving the rotation shaft 1 in the present invention. However, the driving device for driving the rotating shaft 1 is not limited to the illustrated structure. For example, a chain may be used instead of the belt 18, and gears that mesh with the chain may be used as the gears 15 and 17. The rotating shaft of the motor may be directly connected to the rotating shaft 1 without providing such a power transmission mechanism.

Further, between the plates 13 and 14,
A plurality of opening members 2 are fixed around the rotation shaft 1. FIG. 5 is a perspective view showing a main part of the structure to which the plurality of opening members 2 are attached.

As is clear from FIG. 5, the rotating shaft 1 has
A plurality of opening members 2 are attached. Although not particularly shown, the opening member 2 has a key, and the key is fitted into a slot provided in the axial direction of the rotating shaft 1 so that the opening member 2 can rotate together with the rotating shaft 1. Is configured. In this case, the opening member 2 is movable in the axial direction of the rotating shaft 1.

The opening member 2 may be completely fixed to the rotating shaft 1 so as not to move in the axial direction of the rotating shaft 1. In the present structural example, a ring 19 having a predetermined length is attached between the opening members 2. Ring 19
Has an inner diameter substantially equal to that of the rotating shaft 1, and is extrapolated to the rotating shaft 1 so as to freely rotate around the rotating shaft 1.

The length of the ring 19, that is, the length along the axial direction of the rotating shaft 1 is determined according to the interval between the blood collection tubes leaning against the blood collection tube rack inserted into the blood collection tube opening device 11. That is, the length of the ring 19 is selected so that the plurality of opening members 2 can be brought into contact with the stoppers of the plurality of blood collection tubes leaned against the blood collection tube rack to perform the opening operation.

In the present structural example, as described above, the opening member 2 can rotate together with the rotary shaft 1, but is movable in the axial direction, and the ring 19 is inserted outside the rotary shaft 1, and Since the ring 19 is freely rotatable around the rotation shaft 1, the ring 19 can be easily changed. That is, the ring can be easily changed to a ring having a different length along the length direction of the rotating shaft 1, thereby easily accommodating a blood collection tube leaned against various racks.

If the rack and blood collection tube to be opened by the blood collection tube opening device 11 are fixed, the plugging member 2 may be directly fixed to the rotating shaft 1 as described above. In this case, the ring 19 may not be used, or the ring 19 may be fixed to the rotating shaft 1.

Since the ring 19 is used to determine the distance between the opening members 2 and 2,
It can be made of an appropriate material such as metal or synthetic resin.

As shown in FIG. 4, the plate 13 is formed with an opening 14b for inserting a blood collection tube rack. A rack 20 on which a plurality of blood collection tubes are leaned from the opening 14b.
Is inserted. The rack 20 is not particularly limited, and a rack conventionally used for standing a plurality of blood collection tubes in a clinical test can be used. In FIG. 4, a plurality of blood collection tubes 7 are set up against the rack 20. The blood collection tube 7 has a blood collection tube main body 5 and a stopper 6 attached so as to close an upper end opening of the blood collection tube main body 5.

On the base plate 12,
A pair of holding plates 22 and 23 are provided upright as a pair of holding members in order to regulate the movement of the rack 20 and thus the blood collection tube 7 during the opening operation. FIG. 6 is a partially enlarged perspective view of a portion where the holding plates 22 and 23 are provided.

The distance between the holding plates 22 and 23 is equal to or slightly larger than the width of the rack 20. Therefore, even when a force in the width direction acts on the blood collection tube 7 and the rack 20 at the time of opening, the movement of the rack 20 in the width direction is restricted by the holding plates 22 and 23,
Opening can be performed reliably.

Since the holding plates 22 and 23 are provided to lock the movement of the rack during the opening operation as described above, a suitable material having rigidity, for example, metal or plastic material is used. Can be configured.

Returning to FIG. 3, between the plates 13 and 14,
A chute 24 for dropping the removed plug to the outside is fixed. In this structural example, the chute 24 is formed of a metal plate having a certain area, and both end edges are bent upward, and the bent edge portions are fixed to the inner surfaces of the plates 13 and 14. . The chute 24 is higher on the opening member 2 side,
It is arranged so that it becomes lower as it goes away from the camera.
Therefore, the plug 6 removed by opening is dropped on the chute 24 and discharged out of the blood collection tube opening device 11.

The gear 15 is formed integrally with a projection 15a. On the other hand, below the gear 15, a limit switch 25 is arranged. Limit switch 25
Are fixed to the plate 14. Projection 1 of gear 15
When the contact 5a comes into contact with a contact (not shown) of the limit switch 25, the rotation of the motor 16 is stopped. The position of the projection 15a is selected so that the rotation of the rotating shaft 1 is stopped after the removal of the plug by the second claw portion 4 is completed, and the initial state is established.

That is, when the blood collection tube opening device 11 is driven, first, a switch (not shown) is turned on, the motor 16 is driven, and the rotating shaft 1 is rotated. In this case, in the initial state, the plug opening member 2 is stopped in a state before the first claw portion 3 contacts the plug 6.

The opening operation shown in FIGS. 1A to 1D is performed in conjunction with the above-mentioned rotation, and the plug 6 is removed from the blood collection tube main body 5. Thereafter, the projection 15a comes into contact with the contact point of the limit switch 25, the rotation of the motor 16 is stopped, and the plug opening member 2 is stopped at the initial position. That is, the position of the above-described protrusion 15a is selected so as to stop the opening member 2 in the initial state when performing the opening operation.

In the plugging device 11 for blood collection tubes, as described above, the rotating shaft 1 is rotated, and the tips 3a and 4a of the first and second claws 3 and 4 of the plugging member 2 are sequentially placed on the side surfaces of the plug 6. , The plug 6 is removed from the blood collection tube main body 5. Therefore, the conventional rod is brought into contact with the side of the stopper,
An opening device that removes the plug from the blood collection tube body by pushing the stopper, or a pair of arm-shaped opening members that abut against the side surface of the stopper and swing the arm-shaped opening member to collect the stopper. The plug 6 can be quickly and easily removed from the blood collection tube main body 5 as compared with an opening device that is pulled out from the blood vessel main body. Moreover, since the opening member 2 is merely configured to be able to rotate together with the rotary shaft 1, a large space is not required for providing the opening member 2, so that the small opening device 11 is provided. can do.

Further, as described above, by disposing a plurality of opening members 2 on the rotating shaft 1, the stoppers can be removed at once from the plurality of blood collection tubes leaned against the rack, and the clinical test center can be removed. It is possible to efficiently perform the operation of opening the blood collection tube in the above method.

In addition, even if the stopper 6 has a concave portion in the center of the upper surface and the central portion is made thin, the first and second claws 3 and 4 come into contact in order from the side. Since the plug is opened, even in such a blood collection tube having a rubber plug whose head has a relatively low strength, the plug can be easily and reliably removed.

In the illustrated blood collection tube opening device 11,
As described above, the first and second claws 3 and 4 each having an arcuate outer peripheral surface are provided. However, the shape of the plug opening member 2 is not limited to the illustrated one. As shown, the first and second claws 3 and 4 may have a planar shape obtained by combining straight lines.

Further, in addition to the first and second claws, third and fourth claws may be appropriately added between the first and second claws. In the blood collection tube opening device 11, the plurality of opening members 2 are attached to the rotating shaft 1, but the plurality of opening members 2 may be integrated. That is, as shown in a perspective view in FIG.
4 may be extended to use an opening member 2A obtained by integrating the plurality of opening members 2 described above. Unplugging member 2A has a through-hole 2A ₁ of the rotary shaft 1 is inserted through the central through-hole 2
Key grooves 2A ₂ and 2A ₂ are formed on the peripheral wall of A ₁ . By the rotation shaft 1 preferably provided the key corresponding to the key grooves 2A _2, it is possible to mount the elongate cap removal member 2A, the rotary shaft 1 for rotation with the rotary shaft 1.

Since the plug member 2A shown in FIG. 8 has a structure in which the plural plug members 2 of the above embodiment are integrated, the pitch of the plural blood collection tubes in the blood collection rack is changed. Can be handled as it is. That is, it is possible to cope with blood collection tubes arranged at any pitch by using the elongated plug member 2A. In addition, even if the blood collection tube pitch is partially varied, the first and second claws 3 and 4 are extended in the axial direction, so that it is possible to cope with this and the plug can be reliably opened. .

Further, since the long opening member 2A has a structure in which the plurality of opening members 2 are integrated, the attached blood and the like can be easily washed. That is, in the structure in which the plurality of opening members 2 are attached with the ring 19 interposed therebetween, blood or the like may enter the gap between the opening member 2 and the ring 19, and a complicated cleaning operation may be forced. is there. On the other hand, when the long opening member 2A is used, such a gap does not occur, so that the attached blood and the like can be easily washed.

The material constituting the elongated plug member 2A is not particularly limited, and can be made of metal, plastic, or the like. When the stopper member 2A is made of metal, laser processing or the like is required for forming the claws 3 and 4, which increases the cost. However, the claws 3 and 4 can be formed with high precision. . When the plug member 2A is made of plastic, the plug member 2 can be easily manufactured by injection molding, so that the long plug member 2A can be provided at low cost, and the weight of the plug member 2 can be reduced. Can play.

In the above-described blood collection tube opening device 11, FIG.
As shown in FIG. 2 and FIG.
Although the second claw portions 3 and 4 are formed, in the blood collection tube opening device according to the present invention, only one claw portion may be provided on the opening member. The stopper can be reliably and easily removed from the blood collection tube.

That is, as shown in FIG.
In the case where only the pawl 4 is provided and the pawl 3 is not provided, the pawl 4
The end 4a of the laterally protruding portion is in contact with the side surface of the plug 6, and the plug 6 can be reliably removed from the blood collection tube main body 5.

When only a single claw 4 is provided on the opening member 1 as described above, if a greater force is required to remove the stopper 6 from the blood collection tube main body 5, the opening is required. What is necessary is just to raise the driving force of the motor used for rotation of the plug member 1.

FIG. 10 is a perspective view for explaining another modified example of the blood collection tube opening device 11 described above, and corresponds to FIG. The blood collection tube opening device 31 according to this modification is different from the blood collection tube opening device shown in FIG. 4 in that a roller 32 is provided, and the other points are the same.

The roller 32 is mounted so as to extend between the plates 13 and 14. The roller 32 is preferably mounted so as to rotate in a direction opposite to the axis of the stopper member 2, and its outer peripheral surface is covered with a blood absorbing member.

The roller 32 is provided for removing blood adhered to the claws 3 and 4 of the plugging member 1 after the blood collection tube is plugged using the plugging member 1. For example, FIG.
As shown in (a) and (b), the outer surface of the roller 32 is
The diameter of the roller 32 is selected so that it can come into contact with the outer peripheral surface of the rotating pawl 4. In FIG. 11, illustration of the pawl portion 3 is omitted. The outer peripheral surface of the roller 32 is covered with the above-described blood absorbing member 32a,
The blood adhering to the outer peripheral surfaces of the pawl portions 3 and 4 can be effectively absorbed, whereby the blood adhering to the pawl portions 3 and 4 can be more reliably removed. Further, two or more rollers 32 may be attached in order to more reliably remove the blood adhered to the pawl portions 3 and 4.

The blood absorbing member 32a is not particularly limited, but for example, a member made of paper, nonwoven fabric, woven fabric, absorbent resin, or the like can be used.

[0059]

According to the first aspect of the present invention, the opening member attached to the rotating shaft has a pawl portion so as to rotate together with the rotating shaft, and the pawl portion has the rotating shaft. Since the stopper is removed by being brought into contact with the side surface of the stopper with the rotation of the stopper, the stopper can be easily and quickly removed from the blood collection tube main body.

Further, since the opening member rotates with the rotating shaft, a large space is not required for providing the opening member, so that the size of the blood collection tube opening device can be reduced. That is, while the conventional opening device in which the rod is abutted from the side of the stopper requires a large space for the opening member on the side of the blood collection tube, the opening device for the blood collection tube according to the present invention is required. The device does not require such a large space.

In a conventional opening device in which a pair of arm-shaped opening members are brought into contact with the side surface of the stopper and the arm-shaped opening member swings, a complicated mechanism is required for opening. On the other hand, in the blood collection tube opening device according to the present invention, since the opening member having the claws only needs to be rotated, the structure for performing the opening operation can be simplified. In this regard, the size of the blood collection tube opening device can be reduced.
Cost reduction can be achieved.

According to the second aspect of the present invention, the plug opening member has the first and second claws which are sequentially brought into contact with the plug, and is located between the rotation axis center of the tip of the first claws. Is shorter than the distance between the tip of the second claw and the center of the rotating shaft, so that the tip of the first claw abuts on a relatively upper portion of the side surface of the plug, The plug can be moved by the first pawl to a state in which the plug is half-raised from the blood collection tube body, after which a second lower portion of the side of the plug caused by the first pawl can be moved. The stopper can be more reliably removed from the blood collection tube because the tip of the pawl portion is in contact with the blood collection tube. In addition, since the first and second claws are sequentially brought into contact with each other to remove the plug, the rubber stopper can be reliably secured even from a blood collection tube having a recess at the center of the upper surface and a thin rubber stopper at the center. Can be removed.

According to the third aspect of the present invention, the pair of holding members are erected on the base plate, and the interval between the pair of holding members is made equal to or slightly larger than the width of the blood collection tube rack. Since the movement of the rack is restricted by the holding member when opening, the opening by the opening member can be stably performed.

According to the fourth aspect of the present invention, a pair of rotating shaft supporting members are provided on the base plate, and the rotating shaft is rotatably supported by the pair of rotating shaft supporting members.
Therefore, since the rotating shaft can be stably rotated, the opening operation can be stably performed by the opening member.

According to the fifth aspect of the present invention, since a plurality of plugging members are attached to the rotating shaft, for example, a plurality of blood collection tubes leaned against a blood collection tube rack can be utilized by using the plurality of plugging members. It can be opened at a time, and the opening speed of the blood collection tube opening apparatus according to the present invention can be further increased. According to an experiment performed by the inventor of the present invention, the opening speed of the conventional opening device was 1800 tubes / h at the maximum, whereas the opening device for blood collection tubes according to the present invention was used to stand against the rack. It was confirmed that when the plugs were simultaneously opened from a plurality of blood collection tubes, the opening speed could be increased to 3000 tubes / h.

According to the sixth aspect of the present invention, the plurality of opening members are attached to the rotating shaft so as to be rotatable with the rotating shaft, but movably in the axial direction of the rotating shaft. Since a ring having a length corresponding to the distance between the opening members is inserted around the rotation axis between the closing members, the length of the ring between the opening members can be easily changed. That is, by using rings having different lengths along the axial direction of the rotating shaft, the distance between the plugging members can be easily changed, whereby plugging can be performed between a plurality of blood collections leaned against various racks. Can be easily removed.

According to the seventh aspect of the present invention, since a plurality of stopper members are integrated and the pawl portion is formed so as to extend in the length direction of the rotation shaft, the blood collection tube rack can be used for collection. It is possible to reliably cope with a case where the pitch of blood vessels is changed or a case where the pitch is partially different. In any case, a plurality of blood collection tubes can be reliably opened. In addition, since the plurality of opening members are integrated, there is no gap between the plurality of opening members for blood or the like to enter, so that the attached blood or the like can be easily washed and maintenance can be performed. It will be easier.

According to the eighth aspect of the present invention, since the apparatus further includes a roller disposed so as to be in contact with the outer peripheral surface of the claw portion which has been rotated on the outer surface, blood adhered to the outside can be reliably used by the roller. Can be removed. Therefore,
When removing the plug from a new blood collection tube, contamination by blood adhering to the pawl portion can be reliably prevented, and for example, measurement accuracy in a clinical test can be increased.

[Brief description of the drawings]

FIGS. 1A to 1D are schematic front views for explaining a basic principle and structure of an opening operation by an opening member in an opening device for a blood collection tube of the present invention.

FIG. 2 is a schematic front view for explaining a main part of an opening member.

FIG. 3 is a perspective view showing one structural example of the blood collection tube opening device of the present invention.

FIG. 4 is an external perspective view of one example of the structure of the blood collection tube opening device of the present invention as viewed from another direction.

FIG. 5 is an enlarged perspective view showing a portion where a plurality of opening members and rings are mounted around a rotation axis in the blood collection tube opening device shown in FIG. 3;

FIG. 6 is a partially cutaway perspective view for explaining a pair of holding members for holding a blood collection tube rack in the blood collection tube opening device shown in FIGS. 3 and 4;

FIG. 7 is a schematic front view for explaining another example of the plug opening member.

FIG. 8 is a perspective view for explaining still another example of the plug opening member.

FIG. 9 is a side view for explaining an opening operation using an opening member according to a modification in which only a single claw portion is provided.

FIG. 10 is an external perspective view of a modified example of the blood collection tube opening device of the present invention.

FIGS. 11 (a) and (b) are partial cutaway side views for explaining a process of removing blood adhered to a nail portion by a roller used in the blood collection tube opening device shown in FIG. 10; .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2, 2A ... Opening member 3, 4 ... 1st, 2nd nail | claw part 3a, 4a ... The front-end | tip of a 1st, 2nd nail | claw part 5 ... Blood collection tube main body 6 ... Plug 7 ... Blood collection tube 11 ... Blood collection tube opening device 12. Base plate 13 and 14. Plate as rotating shaft support member 15. Gear 16. Motor as driving device 17. Plate 31: blood collection tube stopper device 32: roller

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kunio Shano 1 Machida 1, Makishima-cho, Uji-city, Kyoto Prefecture Inside Micronics Corporation

Claims (8)

[Claims] 1. A plug opening device for removing a plug from a closed blood collection tube, wherein the plug is attached to the rotation shaft so as to rotate with the rotation shaft, and abuts on a side surface of the plug. A plug opening member having a pawl portion to be provided, and a driving device for rotating and driving the rotary shaft, wherein the pawl portion is brought into contact with a side surface of the plug with the rotation of the rotary shaft so that the plug is removed. An opening device for a blood collection tube, characterized in that: 2. The plug opening member has first and second claws that are sequentially contacted with the stopper, and the distance between the tip of the first claws and the center of the rotation axis is the first 2. The blood collection tube opening device according to claim 1, wherein the distance is shorter than the distance between the tip of the second claw portion and the center of the rotation axis. 3. 3. A base plate, and a pair of holding members erected on the base plate, wherein a distance between the pair of holding members is equal to or equal to a width of a rack accommodating a plurality of blood collection tubes. 2. The method according to claim 1, wherein the distance is slightly larger than
3. The blood collection tube opening device according to 2. 4. The device according to claim 1, further comprising a pair of rotating shaft supporting members attached to the base plate, wherein the rotating shaft is rotatably supported by the pair of rotating shaft supporting members. Blood tube opening device. 5. The blood collection tube opening device according to claim 1, wherein a plurality of opening members are attached to the rotating shaft. 6. The plurality of opening members are attached to a rotating shaft so as to be rotatable with the rotating shaft, but movably in the axial direction of the rotating shaft, and the plurality of opening members are opened between the opening members. The blood collection tube opening device according to claim 5, wherein a ring having a length corresponding to the distance between the members is extrapolated around the rotation axis. 7. The device according to claim 5, wherein the plurality of stopper members are integrated so as to extend in the length direction of the rotation shaft, and thereby the claw portion is formed to extend in the length direction. Blood collection tube opening device. 8. The apparatus further comprises a roller disposed so that an outer surface thereof is brought into contact with an outer surface of the claw portion that has been rotated to remove blood adhered to the claw portion.
An opening device for a blood collection tube according to any one of claims 1 to 7.