JP2000237173A - Plug body, vacuum blood collection tube using plug body and manufacture of plug body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively suppress the occurrence of burrs and to improve an yield. SOLUTION: A base material made of an elastic polymer material and having a prescribed thickness is cut into a plurality of small pieces having a square shape by a horizontal cutter and a vertical cutter to form a plug body 14 stuck to the outer face of a sealing sheet member 13 provided on the opening of a vacuum blood collection tube. A recess 15 is formed on the upper face of the plug body 14, and a curve section 16 protruded outward is formed on the lower face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug attached to an outer surface of a sealing sheet member provided at an opening of a vacuum blood collection tube,
The present invention relates to a vacuum blood collection tube using the plug and a method for manufacturing the plug.

[0002]

2. Description of the Related Art A conventional vacuum blood collection tube is shown in FIGS.
It is configured as shown in FIG. FIG. 10 is an external perspective view of a vacuum blood collection tube, and FIG. 11 is a cross-sectional view of a main part thereof. That is, the vacuum blood collection tube is a cylindrical container 51 whose inside is in a vacuum state, and a sealing sheet member 52 attached and attached to the opening of the cylindrical container 51 to hold the inside in a vacuum state, And a plug 53 made of rubber attached to the outer surface of the sealing sheet member 52.

As shown in FIG. 12, a plurality of the plugs 53 are formed by a heating press in advance as a base material 55 in which a plurality of plugs 53 are interconnected by thin plates 54 as shown in FIG. It is obtained by punching each plug 53 portion with a punching die 56 that moves up and down, and is supplied to an assembly process of a vacuum blood collection tube in a state where it is aligned by a parts feeder, and is suction-held by a vacuum pad to hold an adhesive. Is conveyed onto the sealing seal member 52 to which is applied, and is automatically adhered.

In the vacuum blood collection tube configured as described above, as shown in FIG. 13, a distal end of a blood collection needle 59 attached to one end of a rubber tube 58 is inserted into a blood vessel of a human body or the like while the other end thereof is inserted. When the tip of the supply needle 60 is inserted into the cylindrical container 51 through the plug 53 and the sealing sheet member 52,
Blood is sucked from the blood vessel by the negative pressure in the cylindrical container 51,
The blood is supplied into the cylindrical container 51 via the supply needle 60. When the blood collection amount reaches a predetermined value, the blood collection needle 59 is withdrawn from the blood vessel, and the supply needle 60 is connected to the cylindrical container 5.
Pulled out of 1. At this time, the through hole formed by the supply needle 60 formed in the plug 53 is closed by the elasticity of the rubber,
The blood stored in the cylindrical container 51 is prevented from leaking outside.

[0005]

The stopper 53 formed as described above has a peripheral edge when a relative displacement occurs between the base material 55 and the punching die 56 during the punching operation by the punching die 56. The thin plate 54 remains to have burrs. For this reason, when a large number of plugs 53 are aligned and supplied to the assembly process of the vacuum blood collection tube by the parts feeder, the plugs 53 adjacent before and after in the transport direction ride on burrs, and the normal alignment and supply is prevented. In addition, there has been a problem that a normal assembling operation of the automatic assembling line is hindered.

In addition, when the burr is large, the commercial value of the plug 53 is reduced, so that the selection must be strictly performed, and there is a problem that the selection operation becomes complicated. Further, since the thin plate 54 is essentially unnecessary and is to be discarded, there is a problem that the yield of the plug 53 (effective utilization rate of the base material 55) is reduced to cause a cost increase. there were. Furthermore, when the punching position by the punching die 56 is largely displaced, a part of the plug 53 at the adjacent position is in a missing state, so that the pitch between the plugs 53 in the base material 55 is secured with a margin. Therefore, there is a problem that the yield of the plug 53 is reduced from this point as well.

The present invention has been made in view of the above circumstances, and a plug which can effectively suppress the occurrence of burrs and improve the yield, a vacuum blood collection tube using the plug and a vacuum blood collection tube using the plug. An object of the present invention is to provide a method for manufacturing a plug.

[0008]

In order to achieve the above object, a plug according to claim 1 is a plug which is attached to an outer surface of a sealing sheet member provided at an opening of a vacuum blood collection tube. ,
It is characterized in that a base material having a predetermined thickness made of an elastic polymer material is cut into a plurality of small pieces having a polygonal shape.

According to this structure, since the plug body is formed by cutting a base material having a predetermined thickness, burrs do not occur on the peripheral edge, and the plug body has a polygonal shape. As a result, for example, the boundary between adjacent plugs can be cut, so that the discarded portion can be greatly reduced and the yield of the plugs can be improved.

A plug body according to a second aspect of the present invention is the plug body according to the first aspect, wherein the base material is formed in a plate shape having a size including a plurality of the small pieces in a vertical direction and a horizontal direction, respectively. It is characterized by having.

According to this configuration, a plurality of plugs can be obtained by cutting the base material in the vertical direction and the horizontal direction, which is excellent in mass productivity.

The plug according to a third aspect of the present invention is the plug according to the first aspect, wherein the base material is formed in a strip shape having a dimension including a plurality of the small pieces in a vertical direction. I have.

According to this configuration, a plurality of plugs can be obtained by sequentially cutting the base material only in the horizontal direction perpendicular to the vertical direction, and the cutter mechanism can be simplified.

According to a fourth aspect of the present invention, there is provided the plug according to any one of the first to third aspects, wherein a recess is formed on a surface opposite to a surface to which the sealing sheet member is attached. Features.

According to this configuration, the concave portion becomes the target position for inserting the supply needle, so that the operation of inserting the supply needle can be easily performed, while the concave portion is formed at the tip of the supply needle pulled out from the stopper. As a result, it becomes a pool of attached blood,
Inadvertent flow of blood to the outside is prevented.

According to a fifth aspect of the present invention, there is provided the plug according to any one of the first to fourth aspects, wherein an attaching surface to the sealing sheet member has a curved shape protruding outward. And

According to this configuration, even when the sealing sheet member at the opening of the cylindrical container is depressed by the negative pressure inside the container, the sealing sheet member can be stuck and adhered to the surface of the sealing sheet member. As a result, it is possible to prevent an unnecessary gap from being formed between the sealing sheet member and the plug.

The plug according to claim 6 is characterized in that, in the plug according to any one of claims 1 to 5, the cut surface of the small piece has a fine uneven shape.

According to this configuration, it is possible to prevent the cut surfaces from coming into close contact with each other when the stopper is aligned and supplied to the assembling process of the vacuum blood collection tube by the parts feeder. Alignment supply becomes possible.

The plug according to claim 7 is the plug according to any one of claims 1 to 6, wherein the polygonal shape is a square shape.

According to this configuration, the plug is obtained by cutting the base material in the vertical and horizontal directions, so that the structure of the cutter blade can be simplified and the plug can be easily manufactured.

The vacuum blood collection tube according to the present invention is further characterized in that a sealing sheet member is attached to the opening and the inside of the tube is substantially in a vacuum state, and is adhered to the outer surface of the sealing sheet member. The plug according to any one of claims 1 to 7 is provided.

According to this configuration, when the supply needle is inserted into the stopper and the sealing sheet member, blood is collected from the blood collection needle inserted into the blood vessel of the human body due to the negative pressure in the container. Even if the supply needle is pulled out from the stopper and the sealing sheet member, the through hole formed when the supply needle is inserted is closed by the elasticity of the stopper, so that the collected blood does not leak to the outside. .

According to a ninth aspect of the present invention, there is provided a plug which is adhered to an outer surface of a sealing sheet member provided at an opening of a vacuum blood collection tube, the mother body having a predetermined thickness made of an elastic polymer material. The method is characterized by comprising a step of molding a material and a step of cutting the base material into a plurality of polygonal small pieces.

According to this method, the plug is formed by cutting a base material having a predetermined thickness, so that burrs do not occur on the peripheral edge, but since the plug has a polygonal shape, for example, it is adjacent to the plug. As a result, the boundary of the plug can be cut, so that the discarded portion can be greatly reduced and the yield of the plug can be improved.

[0026]

FIG. 1 is an external perspective view of a vacuum blood collection tube to which a plug according to an embodiment of the present invention is applied, and FIG.
It is principal part sectional drawing. In these figures, a vacuum blood collection tube 10 is provided with a cylindrical container 11 in which the inside is in a vacuum state and a sealing sheet which is adhered and attached to an opening 12 of the cylindrical container 11 to maintain the inside in a vacuum state. Member 13 and plug 1 adhered to the outer surface of sealing sheet member 13 with an adhesive or the like
4 is provided.

The cylindrical container 11 is made of transparent glass, synthetic resin, or the like. For example, a sealing sheet member 13 is adhered in a vacuum chamber or the like so that the opening 12 is sealed, so that the inside is substantially vacuumed. It is made to be in a state. The sealing sheet member 13 is formed, for example, by bonding a synthetic resin film for reinforcement such as epoxy resin to the surface of an aluminum foil. In addition, the test agent is stored in the cylindrical container 11 in advance.

The stopper 14 is formed of isoprene rubber so that the periphery is square, the upper surface (surface opposite to the surface to be adhered to the sealing sheet member 13) is flat, and the center thereof is formed. While the recess 15 is formed at the position,
The lower surface (adhering surface to the sealing sheet member 13) is a curved portion 16 protruding outward, and the curved portion 16 is bonded to the sealing sheet member 13 with an instant adhesive or the like. Note that the sealing sheet member 13 is slightly depressed at the center due to the negative pressure in the cylindrical container 11 under the atmospheric pressure.
3 has a curved shape similar to the curved surface.

The plug 14 is manufactured as follows. First, predetermined heat and pressure are applied to the rubber material disposed in the mold by a heating press machine, and a predetermined thickness having a square shape as shown in FIG. ,
(For example, 0.8 to 2.0 mm)
Mold. FIG. 3A is a perspective view of the upper surface of the base material 20, and FIG. 3B is a perspective view of the lower surface of the base material 20. That is, the base material 20 has a flat upper surface and a plurality of recesses 15 formed at predetermined pitches in the vertical and horizontal directions, and a curved portion 16 protruding outward is formed at a position corresponding to each recess 15 on the lower surface. It was done.

Next, as shown in FIG. 4, the base materials 20 molded as described above are
And placed on an unillustrated conveyance table for intermittently transferring at the same pitch as the formation pitch of the concave portion 15 in the direction indicated by the arrow Y, and the arrow X
While being intermittently transported in the direction, the paper is sequentially cut into a horizontal strip by a horizontal cutter blade 21 which moves up and down by a lifting mechanism (not shown) arranged above the transfer table. The cutting position by the lateral cutter blade 21 is a middle position between the recess 15 adjacent in the transport direction of the base material 20 (X-direction) (the position shown by the dotted line L ₁ in FIG. 3).

When the cutting by the horizontal cutter blade 21 is completed, as shown in FIG. 5, the base material 20 cut into a horizontal strip shape is intermittently transported in the direction of the arrow Y and is disposed above the carrier. The vertical cutter blade 22 that moves up and down by a substantially elevating mechanism sequentially cuts the rectangular pieces into independent small pieces. The cutting position by this vertical cutter blade 22 is
It is transport direction center position between adjacent recesses 15 in the (Y-direction) (the position shown by the dotted line L ₂ in FIG. 3). The small rectangular piece cut by the vertical cutter blade 22 becomes the plug 14.

The plug 14 manufactured in this manner is obtained by cutting the plate-shaped base material 20 having the required thickness for the plug 14 in the vertical and horizontal directions. As a result, the burr does not occur as in the related art, so that a large number of plugs 14 are formed.
Even if the parts are fed and arranged to the assembly process of the vacuum blood collection tube 10 by using the parts feeder, there is no situation in which the plugs 14 adjacent to the front and rear in the transport direction run over the burrs unlike the conventional case, so that the normal arrangement and supply can be performed. Therefore, problems such as the automatic assembly line being stopped carelessly do not occur.

Further, since the burrs do not occur on the periphery of the plug body 14 as in the prior art, the sorting operation can be simplified, while the small pieces adjacent to each other cut by the horizontal cutter blade 21 and the vertical cutter blade 22 are directly plugged. Since there is no loss that must be discarded between the small pieces, the yield of the plug 14 (the effective utilization rate of the base material 20) is improved, and the plug is The cost of the body 14 can be reduced.

As a result, the cost of the plug 14 can be reduced, so that the cost of the vacuum blood collection tube 10 to which the plug 14 is applied can be reduced. Further, since the automatic assembly line is not inadvertently stopped, the overall assembling time of the vacuum blood collection tube 10 can be substantially reduced, and the cost of the vacuum blood collection tube 10 can be reduced from this aspect as well. In addition, since the plug 14 has a square shape, the structure of the horizontal cutter blade 21 and the vertical cutter blade 22 can be simplified, and the plug 14 is easily manufactured because the cutting operation is easy. be able to.

In the vacuum blood collection tube 10 configured as described above, the tip of the blood collection needle attached to one end of the rubber tube is pierced into a blood vessel such as a human body in the same manner as in the conventional example. When the tip of the supply needle penetrates the plug 14 and the sealing sheet member 13 and is inserted into the cylindrical container 11, blood is sucked from the blood vessel by the negative pressure in the cylindrical container 11, and the blood is supplied. It is supplied into the cylindrical container 11 via a needle. Then, when the blood collection amount reaches a predetermined value, the blood collection needle is withdrawn from the blood vessel, and the supply needle is withdrawn from the cylindrical container 11. At this time, the through-hole formed by the supply needle formed in the stopper 14 is closed by rubber-like elasticity (that is, re-sealed), so that blood stored in the cylindrical container 11 does not leak to the outside.

Further, since the concave portion 15 is formed on the upper surface of the plug 14, the concave portion 15 becomes a target position where the supply needle is inserted, so that the operation of inserting the supply needle can be easily performed. It is effective that the recess 15 serves as a reservoir for blood adhering to the tip of the supply needle pulled out from the plug 14, and blood inadvertently flows outside and adheres to other parts than the vacuum blood collection tube 10. Is prevented.

Further, since the lower surface of the plug 14 is formed as a curved portion 16, the plug 14 can be adhered to the sealing sheet member 13 in close contact with the sealing member 13, and between the sealing sheet member 13 and the plug 14. A gap is not formed, and leakage of blood that occurs when a gap is formed between the sealing sheet member 13 and the plug 14 is effectively prevented.

The plug 14 according to the present invention and the plug 14
The blood collection tube 10 to which is applied is not limited to the above-described embodiment, and various modifications as described below can be adopted.

(1) In the above embodiment, the base material 20 is first cut by the horizontal cutter blade 21 and then cut by the vertical cutter blade 22 to obtain the plug 14. However, the base material 20 is first cut. After cutting with the vertical cutter blade 22, the horizontal cutter blade 21
The plug 14 can also be obtained by cutting the plug.
Further, a cutter blade having a shape in which a plurality of horizontal cutter blades 21 and a plurality of vertical cutter blades 22 are combined in a lattice shape is formed, and the lattice-shaped cutter blade is moved up and down to punch out and cut the base material 20. Thus, a plurality of plugs 14 can be simultaneously obtained.

(2) In the above embodiment, the horizontal cutter blade 21
And the vertical cutter blade 22 is moved up and down to cut the base material 20, but the horizontal cutter blade 21 and the vertical cutter blade 2 are cut.
2 may be slid to cut the base material 20. In this case, each of the cutter blades may be formed in a disk shape rotatably supported.

(3) In the above embodiment, the horizontal cutter blade 21
The base material 20 is intermittently transported at a predetermined pitch to the vertical cutter blade 22, but the horizontal cutter blade 21 and the vertical cutter blade 22 are moved along the surface of the base material 20 while the base material 20 is stopped. The transfer may be performed intermittently at a pitch.

(4) In the above embodiment, the base material 20 is cut into small rectangular pieces to form the rectangular plugs 14.
However, the plug 14 having a polygonal shape other than a rectangular shape such as a triangular shape or a hexagonal shape is cut into small pieces of a polygonal shape other than a rectangular shape such as a triangular shape or a hexagonal shape.
It is also possible to obtain In the case where the shape of the cut small piece may be over a plurality of types slightly different from each other, a polygonal shape such as a pentagonal shape or a heptagonal shape may be used. In short, in the case of a conventional circular plug, a loss that must be inevitably discarded is formed between adjacent small pieces, but the shape of the plug is a polygonal shape formed by a combination of a plurality of straight lines. If so, it is possible to use all of the plug as a plug without forming a loss between adjacent small pieces, so that the loss can be effectively reduced and the yield of the plug can be improved. be able to.

(5) In the above embodiment, the base material 2 is formed so that all of the cut small pieces adjacent to each other become plugs 14.
0 is cut by the horizontal cutter blade 21 and the vertical cutter blade 22, but a triangular, square, hexagonal or other polygonal punching blade is prepared, and punching is performed using the polygonal punching blade. The material 20 can be cut. Even in this case, since the shape of the plug is a polygonal shape formed by a combination of a plurality of straight lines, the loss can be effectively reduced as compared with the conventional case where the shape of the plug is a circular shape, Moreover, since the thickness of the base material is the thickness of the plug 14, it is possible to prevent burrs from being formed.

(6) In the above-described embodiment, the base material 20 is formed so that the periphery is square, but it is also possible to form the base material so that the periphery is curved. In this case, the curved peripheral portion is discarded, but in other portions, the yield of the plug 14 can be improved. The rate can be improved as compared with the conventional case.

(7) In the above embodiment, the plug 14 has the concave portion 15 on the upper surface, but the concave portion 15 is not always required. Although the lower surface of the plug 14 is the curved portion 16, the lower surface may be a flat portion.

(8) In the above embodiment, the horizontal cutter blade 21
And both surfaces of the vertical cutter blade 22 are formed in a smooth shape,
Although the cut surface of the plug 14 is made to be smooth, a fine uneven portion is formed on one or both surfaces of the horizontal cutter blade 21 and the vertical cutter blade 22 so that the cut surface of the plug 14 is fine. It can also be made to have an uneven shape. In such a case, when the plugs 14 are aligned and supplied to the assembly process of the vacuum blood collection tube by a parts feeder or the like, it is possible to prevent the cut surfaces from closely contacting each other and sucking each other. Supply becomes possible. Also, if the surface of the base material 20 is subjected to a satin finish, as in the case described above, when the plugs 14 are aligned and supplied to a vacuum blood collection tube assembling process or the like using a parts feeder or the like, the mating surfaces come into close contact with each other. Suction can be prevented from occurring, and smooth alignment and supply can be achieved.

(9) In the above embodiment, the base material 20 for obtaining the plug 14 is made of isoprene rubber which is a synthetic rubber, but other various materials having rubber elasticity can be used. Materials can be used. That is, in addition to natural rubber, butadiene rubber, styrene butadiene rubber,
Synthetic rubber such as chloroprene rubber, nitrile rubber, butyl rubber, ethylene propylene rubber, acrylic rubber, silicone rubber, fluorine rubber, urethane rubber, styrene, olefin, urethane, ester, vinyl chloride,
Any elastic polymer material such as an amide-based thermoplastic elastomer may be used. In the case where natural rubber, isoprene rubber, or the like is used, the plug 14 having particularly excellent resealability can be realized.

(10) In the above embodiment, the base material 20 is
The rubber material provided in the mold is press-molded by applying a predetermined heat and pressure by a heating press machine, and the heated elastic polymer material is passed between rolls and compressed. The plate-shaped material may be continuously molded by a calender roll-type molding machine or an extrusion-type molding machine that presses a heated elastic polymer material through a die having a predetermined shape.

When the base material 20 is formed continuously as described above, for example, as shown in FIG. 6, the base material 20 is wound around a roller 31 in advance and intermittently pulled out from the roller 31 forward. The base material 20 is sandwiched and rotated between an upper roller 32 having a plurality of blades 321 formed on a peripheral surface thereof and a lower rotor 33 having a plurality of grooves 331 formed therein for receiving the blades 321 of the upper roller 32 on the peripheral surface. The plug 14 can be continuously obtained by cutting the cut base material 20 in the width direction with the horizontal cutter blade 34 that moves up and down while cutting the base material 20 in the vertical direction, thereby increasing the production efficiency of the plug 14. Can be. In addition, the concave portion 15 and the curved portion 1 shown in FIG.
In the case of forming 6, a convex portion corresponding to the concave portion 15 and a concave portion corresponding to the curved portion 16 may be formed on the roll surface of the molding machine.

When the base material 20 is formed using an extrusion-type molding machine, for example, as shown in FIG.
Can be formed as a strip having a predetermined thickness and the same width W as the width of the plug 14. At this time,
At the same time, a continuous concave portion 35 having the same function as the concave portion 15 shown in FIG. In the case where the base material 20 is formed in an elongated strip shape in this manner, the base material 2
0 intermittently transports forward and moves up and down.
The plug body 14 can be continuously obtained only by cutting the base material 20 in the width direction at 6, and the cutter mechanism can be simplified since only the horizontal cutter 36 needs to be provided.

The belt-shaped base material 20 having a predetermined thickness is formed as shown in FIG.
As shown in (1), the hollow portion 37 may be formed continuously inside. Even in this case, the plug 14 can be continuously obtained only by intermittently transporting the base material 20 forward and cutting the base material 20 in the width direction with the horizontal cutter 36 that moves up and down. When the hollow portion 37 is formed inside in this way, it is possible to effectively prevent the blood adhering to the tip of the supply needle pulled out from the plug 14 after blood collection from scattering upward. If a depression 38 as shown is formed in the lower center of the cavity 37, the depression 38 can be used as a pool for blood adhering to the tip of the supply needle pulled out from the plug 14. .

(11) If the colors of the sealing member 13 and the plug 14 of the vacuum blood collection tube 10 in the above embodiment are changed for each type of the test agent, the type of the vacuum blood collection tube 10 by the test agent can be visually checked. It can be determined. Further, the cut shape of the plug 14 (for example, a triangle,
If the shape of the vacuum blood collection tube 10 is changed, the type of the vacuum blood collection tube 10 can be determined not only visually but also by touch.

(12) The plug 14 in the above embodiment is obtained by cutting the base material 20 having a predetermined thickness into a plurality of small pieces having a polygonal shape. 9 is obtained, and the base material 20 is cut in the radial direction by a cutter 39 that moves vertically while intermittently moving the base material 20 at a pitch corresponding to the thickness dimension of the plug 14. Then, the plug 14 can be continuously obtained by forming small pieces. In addition, the cutter 39 is attached to the plug 1
The cutting may be performed while intermittently moving along the base material 20 at a pitch corresponding to the thickness dimension of No. 4. In any case, the cut surface C (the surface along the radial direction) serves as an attachment surface for the sealing sheet member 13 provided at the opening of the vacuum blood collection tube 10.

The elongate body constituting the base material 20 may have any shape such as a prismatic shape having a polygonal cross-section such as a triangular cross-section or a quadrangle-shaped cross-section, an elliptic cylindrical shape having an oval-shaped cross-section, or the like, in addition to the cylindrical shape having a circular cross-section. Cross-section. A base material 20 having a different cross-sectional shape depending on the type of the test agent may be used. In such a case, the type of the vacuum blood collection tube 10 can be determined not only visually but also by touch. In short, the plug 14 is formed by cutting the base material 20 which is a long columnar body made of an elastic polymer material into a plurality of small pieces by cutting in a radial direction, and made of an elastic polymer material. The method includes a step of molding a base material that is a long columnar body, and a step of cutting the base material in a radial direction at a predetermined pitch into small pieces.

The plug 14 thus obtained can be continuously obtained by cutting the long base material 20 at a predetermined pitch in the radial direction, so that the production efficiency can be improved. In addition, since the loss portion of the base material 20 is effectively reduced, the yield of the plug 14 can be improved. Furthermore, since it is only necessary to provide the cutter 39 that moves up and down,
The cutter mechanism can be simplified.

[0056]

As described above, the plug according to the first aspect is formed by cutting a base material having a predetermined thickness made of an elastic polymer material into a plurality of small pieces having a polygonal shape. Therefore, while it is possible to effectively suppress the occurrence of burrs on the periphery, it is possible to effectively reduce the loss portion and improve the yield of the plug body because it has a polygonal shape. it can.

Further, in the plug according to the second aspect, since the base material is formed in a plate shape having a size including a plurality of small pieces in the vertical direction and the horizontal direction, the plug is cut in the vertical direction and the horizontal direction. As a result, multiple plugs can be obtained,
Excellent mass productivity.

In the plug according to the third aspect, the base material is formed in a band shape having a size including a plurality of small pieces in the vertical direction. As a result, the cutter mechanism can be simplified.

Further, in the plug according to the fourth aspect, since the concave portion is formed on the surface opposite to the surface to be adhered to the sealing sheet member, the operation of inserting the supply needle or the like can be easily performed. On the other hand, the recess can be a pool of blood attached to the tip of the supply needle pulled out when the collection of blood is completed, so that the collected blood is not inadvertently attached to the outside of the plug. Can be

Further, in the plug according to the fifth aspect, since the surface to be adhered to the sealing sheet member has a curved shape protruding outward, the sealing sheet member at the opening of the container has a negative pressure inside the container. Thus, even when the sealing sheet member is in a depressed state, it can be stuck and adhered to the sealing sheet member surface.

In the plug according to the sixth aspect, since the cut surface of the small piece has a fine uneven shape, the cut surface is flattened when the plug is aligned and supplied to an assembling process or the like by a parts feeder or the like. Can be effectively prevented from adsorbing to each other.

In the plug according to the seventh aspect, since the polygonal shape is a quadrangular shape, the plug is obtained by cutting the base material in the vertical and horizontal directions, so that the plug is easily manufactured. be able to.

In the vacuum blood collection tube according to the eighth aspect, a sealing container member is attached to the opening, and a cylindrical container whose inside is substantially in a vacuum state, and which is attached to an outer surface of the sealing sheet member. Since the plug according to any one of claims 1 to 7 is provided, the cost of the plug can be reduced, and as a result, the cost of the vacuum blood collection tube can be reduced.

In the method of manufacturing a plug according to the ninth aspect, the step of molding a base material having a predetermined thickness made of an elastic polymer material and the step of cutting the base material into a plurality of polygonal small pieces are included. With this arrangement, burrs do not occur on the peripheral edge, while the polygonal shape makes it possible to effectively reduce the loss portion and improve the yield.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a vacuum blood collection tube to which a plug according to an embodiment of the present invention is applied.

FIG. 2 is a sectional view of a main part of the vacuum blood collection tube shown in FIG.

3A and 3B are perspective views of a base material for explaining a method of manufacturing a plug applied to the vacuum blood collection tube shown in FIG. 1, wherein FIG. 3A is a perspective view of an upper surface side, and FIG. It is a perspective view.

FIG. 4 is a view for explaining a method of cutting the base material shown in FIG. 3 with a horizontal cutting blade.

FIG. 5 is a view for explaining a method of cutting the base material shown in FIG. 3 with a vertical cutting blade.

FIG. 6 is a perspective view for explaining another manufacturing method of the plug applied to the vacuum blood collection tube shown in FIG. 1;

FIG. 7 is a view showing another example of the shape of the base material for manufacturing the plug applied to the vacuum blood collection tube shown in FIG. 1;

FIG. 8 is a view showing another example of the shape of a base material for manufacturing the plug applied to the vacuum blood collection tube shown in FIG. 1;

FIG. 9 is a perspective view for explaining another method for manufacturing the plug applied to the vacuum blood collection tube shown in FIG. 1;

FIG. 10 is an external perspective view of a vacuum blood collection tube to which a conventional plug is applied.

11 is a cross-sectional view of a main part of the conventional vacuum blood collection tube shown in FIG.

FIG. 12 is a perspective view of a base material for explaining a method of manufacturing a conventional plug body.

FIG. 13 is a diagram for explaining a blood collection method using a vacuum blood collection tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vacuum blood collection tube 11 Cylindrical container 12 Opening 13 Sealing sealing member 14 Plug body 15 Depression 16 Curved part 20 Base material 21 Horizontal cutter blade 22 Vertical cutter blade 32 Upper roller 33 Lower roller 34, 36 Horizontal cutter

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Atsushi Taryanagi 1 Fukushimaku, Izumizaki, Izumizaki-mura, Nishishirakawa-gun, Fukushima F-term in Asahi Rubber Co., Ltd. 4C038 TA01 UD01 UD04

Claims (9)

[Claims] 1. A plug attached to an outer surface of a sealing sheet member provided at an opening of a vacuum blood collection tube, comprising a plurality of base materials having a predetermined thickness made of an elastic polymer material and having a polygonal shape. A plug body formed by cutting into small pieces. 2. The plug according to claim 1, wherein the base material is formed in a plate shape having a size including a plurality of the small pieces in a vertical direction and a horizontal direction, respectively. 3. The plug according to claim 1, wherein the base material is formed in a band shape having a size including a plurality of the small pieces in a vertical direction. 4. The plug according to claim 1, wherein a concave portion is formed on a surface of the sealing sheet member opposite to a surface to which the sealing sheet member is adhered. 5. The device according to claim 1, wherein a surface to be adhered to the sealing sheet member has a curved shape protruding outward.
The plug according to any one of claims 1 to 4. 6. The plug according to claim 1, wherein a cut surface of the small piece has a fine uneven shape. 7. The plug according to claim 1, wherein the polygonal shape is a square shape. 8. A cylindrical container in which a sealing sheet member is attached to an opening and the inside of which is substantially in a vacuum state, and which is attached to an outer surface of the sealing sheet member. A vacuum blood collection tube, comprising the plug according to any one of the above. 9. A step of molding a plug having a predetermined thickness made of an elastic polymer material, said plug being attached to an outer surface of a sealing sheet member provided at an opening of a vacuum blood sampler; Cutting the base material into a plurality of small pieces having a polygonal shape.