JPH0719002Y2 - Sample suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sample suction device capable of sucking a sample inside a container by piercing a sealed sample container with a thin tube for sample suction. The present invention relates to a sample suction device which does not require a drive source and which is provided with a cover for safety and can move a thin tube by opening and closing the cover.

[Conventional technology]

As a conventional technique for sucking a sample from a sealed sample container, there is one described in JP-A-58-76765.
In this publication, a sample tube held by a notched disk is rotated around an axis of a power source to move to a predetermined suction position, and a double-tube suction needle is sequentially pierced into a sealing stopper of the sample tube. An apparatus for aspirating a sample is described.

[Problems to be solved by the invention]

The above conventional device requires not only a power source for moving the suction needle to pierce the sealing plug, but also a power source and mechanism for moving the sample tube to the suction unit. That is, the structure is complicated and expensive. Further, when the sample is urgently measured, it takes time until the sample is sucked, which is inconvenient.

In addition, safety is required so that the sharp tip of the suction needle will not be injured by touching it.

The present invention has been made in view of the above points, by omitting the function of moving the sample container by using the driving source, further providing a cover for safety, and moving the sample suction thin tube by opening and closing the cover. An object of the present invention is to provide a sample suction device having a simple structure, which does not require a drive source for moving a thin tube.

[Means for solving problems]

In order to achieve the above object, the sample suction device of the present invention comprises a sample container hermetically sealed by a stopper 12 as shown in the drawings.
In the sample suction device that holds 10 and the thin tube 16 moves to pierce the stopper 12 to suck the sample in the sample container, an openable / closable cover 20 that can cover the moving region of the thin tube 16 and a reciprocating straight line. The cover 20 includes a movable slider 50 and a thin tube 16 attached to the slider 50 so as to be parallel to the moving direction of the slider 50. It is characterized in that it is connected to the slider 50.

When connecting the cover 20 and the slider 50, the pinion 32 is rotatably supported, and one end is rotatably attached to the movable part of the cover 20 and the other end is rotatably displaced from the center of the pinion 32. Coupling attached to 28
And a rack 46 mounted on the slider 50 and meshing with the pinion 32 can be used.

Further, in the middle of opening and closing the cover 20, one end is rotatably supported and the other end is rotatably attached at a position deviated from the center of the pinion 32 so that the dimension between both ends may be minimized. Springs that try to
40 can be provided.

In place of the spring 40, one end is rotatably supported and the other end is displaced from the center of the pinion 32 so that the dimension between both ends may be maximized during opening and closing of the cover 20. A rotatably mounted spring having a compressive force may be provided.

Furthermore, when holding the sample container, two holders 72,
A sample container is sandwiched and held by both ends by a 76, and a rack 92 attached to one holder 76, a rack 96 arranged so that its teeth face the rack 92, and a cover 20 attached to a slider 50. The rack 9 does not contact the rack 96 in the open state and the rack 9 moves in the closed state when the rack 9
It is possible to use a mechanism constituted by a spring member 52 that meshes two and 96 teeth.

[Action]

The cover 20 is opened, the sealed sample container 10 is installed, and the cover 20 is closed. By closing the cover 20, the cover 20
The slider 50 connected to is moved. Since the thin tube 16 is attached to the slider 50 in parallel with its moving direction, the thin tube 16 is advanced (upward in FIG. 1) and pierces the held plug 12 of the sample container 10 to suck the sample 14 inside the container. can do.

When the suction of the sample is completed, the cover 20 is opened. When the cover 20 is opened, the slider 50 moves in the opposite direction (downward in FIG. 1).
, And the thin tube 16 also retracts (downward in Fig. 1)
Removed from 12. Then, the sample container 10 is taken out.

Specifically, by opening and closing the cover 20, the connector 28 rotates the pinion 32 forward and backward. This pinion 32
Since the rack and the rack 46 attached to the slider 50 mesh with each other, the slider 50 is linearly moved back and forth, and the thin tube is also moved forward and backward.

When the cover 20 is opened from the closed state, the pinion 32 rotates to try to shorten (or lengthen) the spring 40. Force to stretch (or force to shrink)
If you use a spring with
20 tries to return to the closed state. That is, the cover 20 can stably maintain the closed state.

As the cover 20 is opened, the length of the spring gradually becomes shorter (or longer) and finally becomes the minimum (or maximum), and then the dimension becomes longer (or shorter) again. For this reason, the cover 20 is about to open more due to the action of the spring. That is, the cover 20 can stably maintain the open state.

When the cover 20 is open, the spring material 52
The racks 92 and 96 are not in mesh with each other because they do not abut the 96. Therefore, the holder 76 can be moved to hold the sample container 10 between the holders 72 and 76. When the cover 20 is closed, the spring member 52 moves together with the slider 50 and pushes the rack 96. Then, the teeth of the racks 92 and 96 are meshed with each other, so that the holder 76 is fixed. In this way, the sample container 10 is also firmly held, so that the thin tube 16 can pierce the stopper 12 without trouble. When the cover 20 is opened, the spring member 52 returns to the original position and does not contact the rack 96, so that the teeth of the racks 92 and 96 do not mesh with each other. Therefore,
If the holder 76 is moved, the sample container 10 can be taken out.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the shape of the components described in this embodiment, the relative arrangement, etc., are not intended to limit the scope of the present invention to only those unless otherwise specified, and are merely examples of explanation. Only.

FIG. 1 is a left side view of a partial cross section of an embodiment of the sample suction device of the present invention, showing a state in which a sample container is installed and a cover is closed. FIG. 4 is a simplified view of FIG. 1 with the cover open. FIG. 2 is a front view of FIG. 1, and a cover and a sample container are omitted. FIG. 3 is a front view of the main part with the cover closed.

16 and 18 are thin tubes having sharp tips, and the stopper 12 of the sample container 10 can be pierced. Cover provided for safety
Reference numeral 20 covers the sample container 10 and the thin tubes 16 and 18. A lever 22 is attached to the cover 20 and is rotatably supported by a shaft 24. Therefore, the cover 20 can be opened and closed manually. The shaft 26 provided at the end of the lever 22 allows the connector to be connected.
28 is rotatably connected to the lever 22.

The pinion 32 is rotatably supported by a shaft 36, and the shaft 30 is provided at a position deviated from the center of the pinion.
Thus, the connector 28 is rotatably connected to the pinion 32.

A rack 46 having teeth 48 that mesh with the teeth 34 of the pinion 32,
It is attached to the slider 50. Slider 50 has axis 58,
Using the 62 as a guide, it is possible to move back and forth linearly. The shafts 58 and 62 are supported at their opposite ends by holders 54 and 56, respectively. If the opening / closing operation of the cover 20 is converted into the reciprocating linear movement of the slider 50 by using the rack 46 and the pinion 32, the force can be transmitted without difficulty, and the problem such as abrasion of the mechanical portion does not occur. A holder 70 joined to the thin tubes 16 and 18 is attached to the slider 50 by a holder 68 so that the axial directions of the thin tubes 16 and 18 and the moving direction of the slider 50 are parallel to each other. One of the thin tubes 16 and 18, for example, the thin tube 16 is for aspirating the sample, and the sample 14 is placed in the sample container 10.
It is for deriving from the inside to the outside. The other thin tube
Reference numeral 18 is for ventilation and is also for introducing air from the outside to the inside of the sample container 10. By thus providing the ventilating thin tube, the inside of the sample container can be brought to the atmospheric pressure state, so that the sample suction can be easily performed. Moreover, since the thin tubes 16 and 18 can be made thin, the plug 12 can be easily pierced.

A holder 72, which is penetrated through the thin tubes 16 and 18 and in which a closed chamber-like cleaning tank 74 is provided, is attached to the front panel 106.

A holder 76 penetrating the shafts 84 and 88 and vertically movable along the shafts 84 and 88 is provided above the holder 72. Both lower ends of the shafts 84 and 88 are attached to the front panel 106 by a holder 82,
The upper ends are attached to the front panel 106 by the holders 80 after the springs 86 and 90 are passed through the shafts 84 and 88, respectively. With the cover 20 in the open state, the sample container 10 is held in the hand, its bottom is brought into contact with the holder 76, and a force larger than the elastic force of the springs 86 and 90 is applied upward, so that the holder is
Since the 76 can be lifted, the sample container 10 can be easily installed between the holders 72 and 76 with one hand, which is convenient. Further, a concave portion 78 is provided in a portion of the holder 76 where the bottom portion of the sample container 10 abuts, and the holder 86 is pressed downward by the springs 86 and 90.
10 is stable and well sandwiched. Further, not only sample containers having different outer diameters but also sample containers having different lengths due to the action of the spring can be used.

In this embodiment, a spring 40 having a force to stretch is provided. As an example, a gas spring in which a high pressure gas is enclosed can be used. One end of the gas spring 40 is rotatably supported by a shaft 42, and the other end is
A shaft 44 provided on an arm 38 mounted on the shaft 36 allows the pinion 32 to be rotatably mounted at a position deviated from the center. In FIG. 1, the centers of the shaft 42, the shaft 36, the shaft 44 in the closed state, and the shaft 44 in the open state are respectively point A,
Expressed by B, C ₁ and C ₂ , the axis 42 is provided at a position where the line segment AB bisects the angle C ₁ BC ₂ . By doing this,
When the shaft 44 is aligned with the shafts 42, 36, the distance between the shafts 42, 44, or the size of the spring, is minimal. Since the gas spring 40 has a force to expand, it tries to expand its size. Therefore, axis 44 is at point C ₁ and point
Stable stop when at C ₂ .

Further, a spring having a force that tends to reduce the size by providing the shaft 42 on the line obtained by extending the line segment AB in the direction of the point B can be used. In this case, the dimension of the spring is maximized when the shaft 44 is aligned with the shafts 42 and 36, and similarly, the shaft 44 should stop stably at the points C ₁ and C _2. You can

That is, in any case, the cover 20 can be stably stopped in the open state and the closed state. cover
To move 20 from open to closed or from closed to open, at least a force sufficient to displace spring 40
Since the cover 20 must be given to the cover 20, the state does not change even if the cover is touched by a hand or the like, and the opening / closing operation of the cover 20 can be reliably performed. Further, when the cover 20 is closed, the force of the spring 40 first acts as a resistance force,
In the latter half, it acts as a force for pushing the thin tubes 16 and 18 into the stopper 12. Therefore, it does not require a large force when closing the cover 20.

Next, an example of a method for fixing the holder 76 during sample suction will be described. FIG. 3 is a front view of the main part when the cover is open. A rack 92 is attached to the holder 76, and another rack 96 is rotatably supported by a shaft 100 so that its teeth 94 and teeth 98 face each other. A spring 102 is applied to the rack 96 to separate the tooth 98 from the tooth 94.
Therefore, since the holder 76 can be moved upward by applying a force, it is easy and convenient to install the sample container 10 between the holders 72 and 76. When the cover 20 is closed, the slider 50 moves upward, so that the spring material 52 such as a leaf spring also moves upward. Then, the spring member 52 contacts the rack 96 and pushes the rack 96 from the rear against the force of the spring 102. Therefore, the racks 92 and 96 mesh with each other, and the holder 76 is fixed and immovable in the vertical direction. That is, since the sample container 10 does not move in the vertical direction and is firmly held between the holders 72 and 76, the thin tubes 16 and 18 can pierce the stopper 12 without any problem. According to this structure, the holder is automatically opened and closed as the cover 20 is opened and closed.
It is convenient because 76 is fixed.

After the capillary tubes 16 and 18 advance and the tip portion thereof protrudes from the holder 72, and after piercing the stopper 12 of the sample container 10 held, if a suction device such as a syringe is used, a predetermined amount of sample can be sucked from the capillary tube 16. You can At the same time, the same amount of air is supplied from the thin tube 18 to the inside of the container. The aspirated sample is quantitatively collected by a quantitative device, and is subjected to treatment such as dilution and then measured.

After the sample suction is completed, the cover 20 is opened. When the cover 20 is opened, the thin tubes 16 and 18 are drawn into the holder 72,
Since the lock of 76 is also released, the holder 76 is lifted up and the sample container 10 is taken out. The openings at the tips of the thin tubes 16 and 18 are arranged in the cleaning tank 74. If a washing liquid is supplied to the thin tubes 16 and 18 and the residual sample is pushed out from the opening and washed away,
The inner walls of 16, 18 are cleaned. When the cleaning liquid is injected from the nipple 75 communicating with the upper part of the cleaning tank, the outer walls of the thin tubes 16 and 8 and the inner wall of the cleaning tank are cleaned and discharged from the nipple 77 communicating with the bottom of the cleaning tank. If air is supplied while being supplied to the inside from the nipple 73 that communicates with the upper part of the cleaning tank, the liquid droplets are also discharged, so that the cleaning is performed better.

Providing a sensor 66 that can detect the position of the slider 50 is convenient because the operation can be confirmed.

Further, springs 60 and 64 may be provided below and above the slider 50 in order to reduce mechanical shocks when the cover 20 is opened and closed.

Further, as a configuration for connecting the cover 20 and the slider 50,
It is needless to say that the configuration is not limited to the above-described embodiment, and a known technique can be used.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

(1) In the sample suction device according to claim 1, since the cover 20 and the slider 50 are connected to each other, by closing the cover, the thin tube 16 is advanced and the stopper 12 of the sample container 10 is pierced so that the sample 14 inside the container can be inserted. Can be suctioned. That is, the drive source for advancing the thin tube becomes unnecessary. In addition, it is safe because it has a cover.

(2) In the sample suction device of claim 2, the rack 46 and the pinion 32 are used to open and close the cover by the slider 50,
Since the thin tube 16 is converted into the reciprocating linear movement, the force can be transmitted without difficulty, and no problem such as wear of the mechanism portion occurs.

(3) In the sample suction device according to the third and fourth aspects, the cover tries to stably maintain the open state and the closed state, respectively. Therefore, even if a small force is applied to the cover, the cover does not move and the cover can be reliably opened and closed. Further, since the force of the spring 40 can be utilized when the thin tube is pierced into the stopper 12, a large force is not required when closing the cover 20.

(4) In the sample suction device according to the fifth aspect, the holder 76 can be moved when the cover is open, which facilitates setting of the sample container 10. Further, when the cover 20 is closed, the holder 76 is automatically fixed, which is convenient.

[Brief description of drawings]

FIG. 1 is a left side view of a partial cross-section showing an embodiment of the sample suction device of the present invention (with the sample container installed and the cover closed), and FIG. 2 is a front view of the device shown in FIG. 1 ( However, the cover and the sample container are omitted), FIG. 3 is a front view of the main part in a state in which the cover is closed, and FIG. 4 is a cross-sectional explanatory view showing a state in which the cover is opened in the apparatus shown in FIG. Is. 10 …… Sample container, 12 …… Plug, 14 …… Sample, 16 …… Sample suction thin tube, 18 …… Ventilation thin tube, 20 …… Cover, 22 …… Lever, 24, 26, 30, 36, 42 , 44, 58, 62, 84, 88, 100
…… Axis, 28 …… Coupling, 32 …… Pinion, 34, 48, 94,
98 ... Tooth, 38 ... Arm, 40 ... Spring (gas spring), 46, 92, 96 ... Rack, 50 ... Slider, 52
...... Spring material, 54, 56, 68, 70, 80, 82 …… Retainer, 60,
64, 86, 90 …… Spring, 66 …… Sensor, 72, 76 ……
Holder, 73, 75, 77 ... Nipple, 74 ... Washing tank, 78 ...
… Recesses, 102… Spring, 104, 106… Front panel, A…
… Center of axis 42, B… Center of axis 36, C ₁ … Center of axis 44 with cover closed, C ₂ … Center of axis 44 with cover open

Claims (5)

[Scope of utility model registration request] 1. A sample container (10) sealed by a stopper (12).
Is held and the thin tube (16) moves to pierce the stopper (12), and in the sample suction device that sucks the sample in the sample container, an openable and closable cover that can cover the moving area of the thin tube (16). (20), a slider (50) capable of reciprocating linear movement, and a thin tube (16) attached to the slider (50) so as to be parallel to the moving direction of the slider (50). A sample suction device characterized in that a cover (20) and a slider (50) are connected so that the slider (50) can be linearly moved back and forth by opening and closing. 2. A pinion (32) rotatably supported,
A connector (28) having one end rotatably attached to a movable part of the cover (20) and the other end rotatably attached to a position deviated from the center of the pinion (32), and a pinion attached to a slider (50). The sample suction device according to claim 1, wherein the cover (20) and the slider (50) are connected by a rack (46) meshing with the (32). 3. During opening and closing of the cover (20), one end is rotatably supported and the other end is rotated to a position offset from the center of the pinion (32) so that the dimension between both ends may be minimized. The sample suction device according to claim 2, further comprising a freely attached spring (40) having an expanding force. 4. The cover (20) is opened and closed, one end is rotatably supported and the other end is rotated to a position deviated from the center of the pinion (32) so that the dimension between both ends may be maximized. The sample suction device according to claim 2, further comprising a freely attached spring having a contracting force. 5. A rack (92) which holds a sample container by sandwiching it from both ends by two holders (72), (76) and is attached to one holder (76), and this rack (92). When the cover (20) attached to the rack (96) with its teeth facing each other and the slider (50) is not in contact with the rack (96) when the cover (20) is open, it is attached to the rack (92) when closed. The sample suction device according to claim 1, 2, 3 or 4, further comprising: a spring member (52) that abuts and moves to mesh the teeth of the racks (92) and (96).