JPH10339733A - Device for taking off stop for blood-sampling tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively and easily remove a stop by rocking a rocking member along with a stop-pressing member and first and second stop-take off pins. SOLUTION: A stop-pressing member 35 is mounted to a rocking plate 16, and a projecting part 36 in spherical surface shape being engaged to the recessed part of the stop of a blood-sampling tube is formed on the lower surface of the stop-pressing member 35. In an initial state, a cam plate 23 is arranged at an upper part so that first and second guide pins 29 and 33 do not contact the inner walls of a recessed part 23a. A rocking device 9 and a traveling plate 8 are moved downward by a knob 17. The distance between first and second sliders 24 and 25 is determined, first and second sliders 24 and 25 approach, and first and second stop-take off pins 28 and 32 cut into the side surface of the stop and are pressed. Then, while the stop is positively retained by the projecting part 36 and the first and second stop-take off pins 28 and 32, the rocking member 9 is rocked left and right and the stop that is retained at the first and second stop-take off pins 28 and 32 is removed from the blood- sampling tube body.

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, for example, a clinical test, and more particularly, to providing a concave portion at an upper portion of the stopper to facilitate penetration of an injection needle or the like. The present invention relates to a blood collection tube opening device suitable for a blood collection tube using a stopper provided with a thin portion.

[0002]

2. Description of the Related Art In the preprocessing of a clinical test, the following preprocessing steps are performed prior to supplying a blood sample placed in a blood collection tube to a clinical test apparatus. First, a centrifugal separation operation for separating blood into serum and a blood clot is performed, then, an opening operation for removing a plug of the blood collection tube is performed, and, depending on the content of the test, one or more blood samples in the blood collection tube are separated. The dispensing operation of dispensing to the container of is performed.

[0003] In the above clinical examination, there is a strong demand for increasing the efficiency of the opening operation, and various opening devices for blood collection tubes have conventionally been proposed. For example, JP-A-6-2
No. 78793 discloses a plug opening arm 5 which comes into contact with a side surface of a plug 51 attached to a blood collection tube, as shown in FIG.
An unplugging device provided with 2, 53 is disclosed. Here, a pair of arms 52 and 53 are pressed against the side surface of the plug 51, the plug 51 is sandwiched, and the plug 51 is pulled out from the blood collection tube to open the plug.

[0004] In recent years, plugs provided with a thin portion have been widely used in order to facilitate insertion of an injection needle or the like into a plug of a blood collection tube. FIG. 14 is a cross-sectional view showing a blood collection tube having such a stopper. In the blood collection tube 55, a stopper 51 is attached to an opening of a bottomed tubular blood collection tube body 56 made of glass or synthetic resin. The stopper 51 is made of synthetic rubber, flexible synthetic resin, or the like, and has a concave portion 51a that opens upward. Since the recess 51a is provided, the vicinity of the bottom of the recess 51a is a thin portion 51b.

When opening the blood collection tube 55 using the opening device described in Japanese Patent Application Laid-Open No. 6-278793, the plug 51 is deformed because the thin wall portion 51b is provided, and the plug 51 is securely opened. In some cases, plugging could not be performed. That is, in the plug 51, since the thin portion 51b is provided, the recess 5
The thickness of the portion 51c around 1a is also reduced. As a result, when the opening arms 52, 53 are pressed against the side surfaces of the stopper 51, the stopper 51 is deformed, and when the opening arms 52, 53 are lifted as they are, the stopper 51 is moved to the opening arms 52, 53.
And the stopper 51 could not be reliably pulled out of the blood collection tube.

Conventionally, there has also been proposed an opening device which is attached to a blood collection tube and fixes the stopper with the blood collection tube as it is, and removes only the plug by tilting it to one side. Also, like the stopper 51, the concave portion 51a
Is provided, the stopper 51 is also deformed and cannot be reliably opened.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to reliably and easily remove a plug from a blood collection tube closed by a plug having a thin wall portion by providing a concave portion on the upper surface. An object of the present invention is to provide an opening device for a blood collection tube.

[0008]

The invention according to claim 1 is an opening apparatus for removing a plug from a blood collection tube closed by a plug having a thin portion by providing a concave portion on the upper surface. A plug holding member having a projection on a lower surface that enters a concave portion of the plug, first and second opening pins which are in contact with side surfaces of the plug so as to substantially face each other via the plug, and the plug holder. A swinging member that supports the member and the first and second opening pins and that swings together with the stopper member and the first and second opening pins is provided.

In the plugging device for a blood collection tube according to the first aspect of the present invention, preferably, the swing member is fixed to the swing plate and the swing plate. A guide extending in a substantially horizontal direction, first and second sliders movably connected along the guide, and first and second protrusions formed respectively on the first and second sliders. A guide pin, the first and second
The first and second stopper pins are attached to the slider, and the first and second stopper pins are connected to the swing plate so as to be movable substantially vertically, and open to the first and second slider sides. Further comprising a cam plate having a concave portion, wherein the concave portion of the cam plate abuts the first and second guide pins when the cam plate is lowered, bringing the first and second sliders close to each other, It is configured to reduce the distance between the first and second opening pins.

[0010] Further, with respect to a coupling structure which enables the cam plate to move in the vertical direction with respect to the swing plate,
Preferably, as set forth in claim 3, a second guide attached to the swing plate so as to extend substantially vertically is further provided, and the cam plate is moved substantially vertically along the second guide. Possible structures may be mentioned.

Preferably, the apparatus further comprises a fixed member fixedly provided, and a moving plate movably attached to the fixed member in a vertical direction. The swing plate is rotatably connected to the plate, and a stopper for restricting rotation of the swing member is provided on the fixed member or the movable plate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a non-limiting embodiment of a blood collection tube opening device according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing an apparatus for opening a blood collection tube according to one embodiment of the present invention. In FIG. 1, the blood collection tube opening device 1 includes a base plate 2 and a support plate 3 erected on the base plate 2. Further, on the upper surface of the base plate 2, the support plate 3
A blood collection tube holding unit 4 for holding a blood collection tube is formed in front of the blood collection tube. The blood collection tube holding unit 4 includes the base plate 2
A blood collection tube bottom insertion plate 5, a plate 6, and a blood collection tube supporting member 6 fixed to the upper surface of the blood collection tube.

A hole 5a is formed in the blood collection tube bottom insertion plate 5, and the hole 5a is configured so that the bottom of the blood collection tube can be inserted. A plate 6 is fixed behind the blood collection tube bottom insertion plate 5 so as to extend upward. Above the plate 6, a blood collection tube support member 7 is fixed. A concave portion 7a is formed in the blood collection tube supporting member 7. The concave portion 7a is configured to have a cylindrical curved surface having a diameter substantially equal to or slightly larger than the outer diameter of the blood collection tube so that the blood collection tube can be inserted, and Has been extended.

The members constituting the base plate 2, the support plate 3, and the blood collection tube holding portion 4 can be made of an appropriate material such as a metal as long as it has a certain degree of rigidity. Further, the base plate 2, the support plate 3, and the blood collection tube holder 4 may be integrally formed of the same material.

A movable plate 8 is mounted in front of the support plate 3. A swinging member 9 is mounted in front of the moving plate 8. FIG. 2 is a perspective view showing a state where the swing member 9 is removed. FIG. 3 shows a state in which the moving plate 8 is removed. As is apparent from FIG. 3, a guide 10 is fixed to the front surface of the support plate 3 so as to extend in the up-down direction. Guide 10
Are fixed as protrusions on the front surface 3a of the support plate 3, and have guide grooves 10a and 10b on the side surfaces. The guide grooves 10a and 10b are formed on each side surface of the guide 10 so as to extend in the length direction.

Further, below the lower end of the guide 10,
An opening 3 b is formed in the support plate 3. As shown in FIG. 2, a connection tool 11 connected to the guide 10 is fixed to the lower surface of the moving plate 8. The connecting tool 11
Guide grooves 10a, 10b formed on the side surface of the guide 10.
The guide 10 is configured to be able to move along the length direction of the guide 10. FIG. 4 is a cross-sectional view showing a connection structure between the guide 10 and the connection tool 11.

The guide grooves 10a and 10b extending along the side surface of the guide 10 have protrusions 11a and 11b
Are engaged. Further, the protruding portion 11 of the connecting tool 11
a, a connector 11 along the guide 10
The bearings 11c and 11d are attached to facilitate the movement of the bearing.

Therefore, the moving plate 8 is configured to be movable in the vertical direction along the guide 10 together with the connecting tool 11. On the other hand, a pair of pins 12 are attached to the rear surface of the moving plate 8 so as to extend rearward (FIG. 2).
Only one of the pins 12 is shown). Pin 12
Is connected to a pin 14 fixed to the support plate 3 via a tension spring 13. Therefore, the downward movement of the movable plate 8 is restricted by the tension springs 13, 13.
It is configured not to move below the opening position described below. Further, when the force applied to the moving plate 8 is released at the opening position to be described later, the moving plate 8 is configured to be pulled upward by the force of the tension springs 13.

The moving plate 8 has a bearing 1 near the lower end.
5 are provided. The bearing 15 is provided to support a rotation shaft serving as a rotation center of the swing member 9. FIG. 5 is a perspective view showing the structure of the swing member 9 attached to the moving plate 8. The swing member 9 includes a swing plate 16
Having. The swing plate 16 has a substantially cross shape as shown in a front view in FIG. A knob 17 for performing a manual operation is attached near the upper end of the swing plate 16.

As shown in FIG. 6, a guide 18 extending vertically and guides 19 and 20 extending substantially horizontally are mounted on the front surface of the swing plate 16. Each of the guides 18 to 20 has the same structure as the guide 10 described above. That is, it has a structure in which guide grooves extending in the length direction are formed on a pair of side surfaces.

As shown in FIG. 5, a connecting member 21 is attached to the guide 18, and the connecting member 21 is
It is configured to be able to move up and down along.
The connecting plate 21 has a cam plate 2 via a plate 22.
3 is fixed. The cam plate 23 has a concave portion 23a opened downward. On both sides of the concave portion 23a, the inner side walls 23b and 23c of the cam plate 23 are inclined so as to go away as they go downward.

The upward movement of the cam plate 23 is regulated by the contact of the cam plate 23 with the knob 17, and the downward movement is regulated by contacting the guide pin, which will be described later, with the upper end of the concave portion 23a. .

The guides 19 and 20 have first and second guides, respectively.
Second sliders 24 and 25 are connected. The sliders 24 and 25 are configured to be movable in a substantially horizontal direction along the guide rails 19 and 20.

The first slider 24 will be described as a representative. The slider 24 includes a connecting member 26 connected so as to be movable along the guide rail 19, and an opening member 27 fixed to the connecting member 26. A first opening pin 28 protruding inward at a lower end of the opening member 27 and a first guide pin 29 protruding forward of the opening member 27.
And Similarly, the second slider 25 also has a connector 30, an opening member 31, a second opening pin 32, and a second guide pin 33.

The sliders 24 and 25 are connected by a pressing spring 34 spanned between the plug members 27 and 31. The spring 34 urges the sliders 24 and 25 so as to move the sliders 24 and 25 away from each other.

The lower part of the swing plate 16 includes
The rotation shaft 40 is fixed so as to rotate together with the swing plate 16. The rotating shaft 40 is provided with the moving plate 8 described above.
The swing member 9 is supported by the swing member 9 so that the swing member 9 can swing right and left about the rotation shaft 40. Note that the swing of the swing member 9 is controlled by stoppers 41 and 42 provided on the movable plate 8.
(See FIG. 2). Note that the stoppers 41 and 42 may be provided on the support plate 3.

As shown in FIG. 1, a stopper member 35 extending far away from the lower end is attached to the swinging plate 16, and the lower surface of the stopper member 35 is shown in FIG. Thus, the spherical convex portion 36 that can fit into the concave portion of the plug of the blood collection tube is formed.

When the cam plate 23 is lowered, the first and second guide pins 29 and 33 enter the recesses 23a of the cam plate 23, thereby moving the sliders 24 and 25 against the urging force of the pressing spring 34. It is provided for approaching. However, the first and second guide pins 2
9, 33 and the shape of the concave portion 23a of the cam plate 23
When the cam plate 23 is at the upper position, it is ensured that the first and second opening pins 28 and 32 are kept away by the urging force of the pressing spring 34,
3 is lowered, the first and second guide pins 29,
33 is arranged in close proximity to ensure that the first and second opening pins 28, 32 are pressed against the side of the plug of the blood collection tube.

Therefore, as long as such an operation can be achieved, the inner side walls 23b, 2 of the concave portion 23a of the cam plate 23
The shape of 3c and the mounting positions of the guide pins 29 and 34 can be changed as appropriate.

Next, the opening operation using the opening apparatus 1 will be described with reference to FIGS. FIG. 7 is a schematic front view showing an initial state in which the closed blood collection tube is set in the opening device 1. First, the closed blood collection tube 55 is inserted into the hole 5a of the blood collection tube bottom holding member 5 of the opening device 1,
In addition, the upper part of the blood collection tube main body 56 of the blood collection tube 55 is positioned in the hole 7a of the blood collection tube support member 7, thereby holding the blood collection tube 55 in the state shown in the figure. The upper end opening of the blood collection tube main body 56 is closed by the stopper 51. The plug 51 has a concave portion 51a at the upper part as shown by a dashed line. Therefore,
The stopper 51 has a thin portion around the concave portion 51a and a thin portion 51c at a portion below the bottom of the concave portion 51a, thereby facilitating piercing of the syringe with a needle or the like.

In the initial state, the moving plate 8 shown by a two-dot chain line is at an upper position. This position corresponds to the moving plate 8
Is urged upward by a pair of tension springs 13, 13. Also, the cam plate 23
Also in the initial state, the first and second guide pins 2
9, 33 and the inner wall of the concave portion 23a are arranged at an upper position so as not to contact with each other. Further, the first and second sliders 24 and 25 are separated from each other by the urging force of the pressing spring 34, and the distance between the tips of the first and second opening pins 28 and 32 is the outer diameter of the stopper 51. Has been larger than.

Next, the moving plate 8 is connected to the springs 13, 13.
Moves downward against the urging force of The operation of moving the moving plate 8 downward can be performed using an appropriate drive source such as an air cylinder or a hydraulic cylinder, or by using the knob 17 shown in FIG.
This can be performed by moving the swinging device 9 and the moving plate 8 downward as a whole.

By moving the moving plate 8 downward, as shown in FIG. 8, the first and second opening pins 28,
32 can be moved downward to the height position at the center of the side surface of the plug 51. From this state, the cam plate 23 is moved downward. The downward movement of the cam plate 23
It may be done manually, or an air cylinder,
This can be done using a hydraulic cylinder or any reciprocating drive source.

When the cam plate 23 moves downward, the first and second guide pins 29, 33 abut against the inner side walls 23b, 23c of the concave portion 23a of the cam plate 23, and when the cam plate 23 further moves downward, The distance between the first and second guide pins 29 and 33 is reduced by the first and second guide pins 29 and 33 being pushed by the inner side walls 23b and 23c. As a result, as shown in FIG.
The second sliders 24 and 25 are brought close to each other against the urging force of the pressing spring 34, and the first and second opening pins 28 and 32 bite into the side surfaces of the stopper 51 and are pressed into contact.

In this case, the first and second guide pins 29,
33 is located on the vertically extending inner wall portions 23d and 23e above the concave portion 23a.
Despite the increase in the urging force, the movement of the sliders 24, 25 outward in the horizontal direction is reliably restricted in the state shown in FIG. Therefore, the first and second opening pins 28, 32 do not move outward from the state shown in FIG.

Further, as shown in FIG.
Is configured so as to be able to enter the concave portion 51a of the plug 51, and therefore, the first and second opening pins 2
Even when the plugs 8 and 32 are strongly pressed against the side surface of the plug 51 from the side, the plug 51 is hardly deformed.

Accordingly, since the spherical convex portion 36 has entered the concave portion 51a of the plug 51, the first and second opening pins 2
Even when the plugs 8 and 32 bite into the plug 51 and are pressed widely, the deformation of the plug 51 is effectively suppressed.
Is securely held by the first and second opening pins 28 and 32 and the projection 36.

Next, while the stopper 51 is securely held by the first and second opening pins 28 and 32, the swinging member 9 is rotated about the rotating shaft 40. In this swing, the swing member 9 swings left and right about the rotation shaft 40 (see FIG. 6) from the state shown in FIG. 1, and as shown in FIG.
The plug 51 held by the second opening pins 28, 32 is removed from the blood collection tube main body 56 of the blood collection tube 51.

Next, after removing the stopper 51 from the blood collection tube main body 56, the moving plate 8 is moved upward, and the stopper 51 is separated above the blood collection tube 55 (see FIG. 11). Thereafter, the blood collection tube main body 56 is removed from the opening device 1, and the cam plate 23 is moved upward. When the cam plate 23 is moved upward, the first and second guide pins 29 and 33 are moved.
Moves along the inner side walls 23b and 23c of the concave portion 23a,
The sliders 24 and 25 are returned to the initial state again by the urging force of the pressing spring 34. As a result, since the first and second opening pins 28 and 32 are separated from the side surface of the stopper 51,
The stopper 51 falls downward. In this manner, the stopper 51 can be removed from the stopper device 1.

In the stopper device 1 shown in FIG. 1, the movable plate 8 is configured to be movable in the vertical direction along the support plate 3, but the entire movable plate 8 is movable in the horizontal direction. The plug 51 thus removed can be moved laterally from above the blood collection tube holding unit 4, and the plug 51 can be dropped and removed at a portion outside the blood collection tube holding unit 4. .

Further, the blood collection tube opening device 1 of the present embodiment is
Although the apparatus has an opening structure corresponding to one blood collection tube, a plurality of blood collection tube holding units 4 are arranged, for example, in the front-rear direction of FIG. An opening structure provided with the opening member 8 and the swinging member 9 may be arranged, and the moving plates 8 of the opening structures may be connected to each other to open a plurality of blood collection tubes at the same time.

[0043]

As described above, the plugging device for a blood collection tube according to the first aspect of the present invention is provided with the plug holding member having a projection on the lower surface which projects into the recess of the plug, and the side surface of the plug. The first and second opening pins are disposed so as to substantially face each other via a stopper, so that the stopper member and the first and second stopper pins are disposed.
With the second stopper pin, a stopper having a thin portion by providing a concave portion on the upper surface can be reliably held. Therefore, the stopper is supported by the stopper member and the first and second opening pins, and the stopper attached to the blood collection tube can be easily removed from the blood collection tube by swinging the swinging member that is swung together with the stopper member. Can be removed.

That is, by using the blood collection tube opening device according to the first aspect of the present invention, it is possible to easily and surely remove the plug from the blood collection tube closed by the stopper provided with the concave portion on the upper surface. It becomes possible.

According to the second aspect of the present invention, the first and second opening pins are attached to the first and second sliders, and the first and second sliders vertically move the cam plate. When the first and second sliders are moved, the first and second guide pins provided on the first and second sliders come into contact with each other by contacting the inner wall of the concave portion of the cam plate.
Is securely pressed against the side of the stopper. That is,
By simply performing the operation of further lowering the cam plate provided on the swinging member in the swinging member, the first and second
Can be reliably pressed against the side surface of the stopper.

According to the third aspect of the present invention, the swing plate is provided with the second guide so as to extend substantially vertically, and the cam plate moves substantially vertically along the second guide. Since the connection is possible, the vertical movement of the cam plate can be easily performed.

According to the fourth aspect of the present invention, the swing plate of the swing member is rotatably connected to the movable plate, and the movable plate is vertically movable with respect to the fixed member provided fixedly. By moving the moving plate up and down, the operation of disposing the first and second stopper pins near the side of the stopper and the stopper removed from the blood collection tube are positioned above the blood collection tube. The operation of moving can be easily performed. In addition, since the stopper for restricting the rotation of the swinging member is provided on the fixed member or the movable plate, it is possible to reliably limit the rotation of the swinging member more than necessary.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an apparatus for opening a blood collection tube according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a swing member is removed from the opening device shown in FIG. 1;

FIG. 3 is a perspective view showing a state where a swinging member and a moving plate are removed from the opening device shown in FIG. 1;

FIG. 4 is a cross-sectional view for explaining a connection structure between a guide and a connector for vertically moving a moving plate.

FIG. 5 is an enlarged perspective view showing a swinging member of the blood collection tube opening device shown in FIG. 1;

FIG. 6 is a front view for explaining a swing plate in the swing member shown in FIG. 5;

FIG. 7 is a diagram for explaining an opening operation of the blood collection tube opening device of the embodiment, and is a schematic front view showing an initial state.

8 is a schematic front view showing a state in which the moving plate has been moved downward from the initial state shown in FIG. 7;

FIG. 9 is a schematic front view showing a state in which the cam plate is moved downward and the stopper is held by the first and second opening pins in the state shown in FIG. 8;

FIG. 10 is a schematic front view illustrating a state in which the stopper is removed from the blood collection tube by swinging the swing member.

FIG. 11 is a schematic front view showing a state in which the moving plate is moved upward, and the removed plug is separated from the blood collection tube.

FIG. 12 is a partially cutaway front sectional view for explaining the relationship between a stopper member attached near the lower end of the swing plate and the blood collection tube in the embodiment.

FIG. 13 is a schematic front view for explaining a conventional blood collection tube opening device.

FIG. 14 is a longitudinal sectional view showing an example of a blood collection tube having a stopper provided with a concave portion on the upper surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Opening device for blood collection tube 2 ... Base plate as a fixing member 3 ... Support plate as a fixing member 4 ... Blood collection tube holding part 8 ... Moving plate 9 ... Swinging member 10 ... Guide rail 11 ... Connecting tool 16 ... Swinging plate 18 Guide 19, 20 Guide 21 Linkage 23 Cam plate 23a Recess 24, 25 First and second slider 26 Linkage 27 Opening member 28 First opening pin 29 First 1 guide pin 30 ... connector 31 ... second opening member 32 ... second opening pin 33 ... second guide pin 34 ... pressing spring 35 ... plug holding member 36 ... convex portion 55 ... blood collection tube 56 ... blood collection tube body 51 ... stopper 51a ... recess 51b ... thin part

Claims (4)

[Claims] 1. An opening device for removing a plug from a blood collection tube closed by a plug having a thin portion by providing a concave portion on an upper surface, wherein the lower surface has a convex portion that enters the concave portion of the plug. A stopper member, a first and a second opening pin which are in contact with a side surface of the stopper via a stopper, and support the stopper member and the first and second opening pins. And a swing member swinging together with the stopper member and the first and second stopper pins. 2. The first and second swinging members, wherein the swinging member is fixed to the swinging plate, and a guide extending in a substantially horizontal direction is connected to the swinging member so as to be movable along the guide. , And first and second guide pins protrudingly formed on the first and second sliders, respectively, wherein the first and second stopper pins are provided on the first and second sliders, respectively. A cam plate attached to the swinging plate so as to be movable in a substantially vertical direction, the cam plate having a concave portion opened to the first and second sliders; However, when the cam plate is lowered, it comes into contact with the first and second guide pins, brings the first and second sliders close to each other, and reduces the distance between the first and second opening pins. It is characterized by being constituted Blood collection tube for cap removal device according to Motomeko 1. A second guide attached to the swing plate so as to extend substantially in a vertical direction;
3. The blood collection tube opening device according to claim 2, wherein the cam plate is connected to be movable in a substantially vertical direction along the guide. 4. A fixed member provided in a fixed manner, and a movable plate mounted to be movable up and down with respect to the fixed member, wherein the swing plate is rotatably connected to the movable plate. 4. The blood collection tube opening device according to claim 3, wherein a stopper for restricting rotation of the swing member is provided on the fixed member or the moving plate.