JPH0719000Y2 - Sample suction device with safety mechanism - 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. Provided with a cover to enhance safety, the sample suction device cannot be started unless the cover is closed, and the cover is prevented from opening during sample suction, and a safety mechanism with a simple structure was provided. The present invention relates to a sample suction device.

[Conventional technology]

As a conventional technique for sucking a sample from a sealed sample container, there is one described in JP-A-58-76765.
This device moves the sample tube held by the notched disk to the suction position by rotating it around the axis of the power source, and sequentially inserts the sample tube by sealing the sample tube with the double-tube suction needle. It is something to suck.

[Problems to be solved by the invention]

The above-mentioned conventional device requires a power source for moving the sample tube to the suction section in addition to the power source for moving the suction needle, and the structure is complicated and expensive. further,
If you want to measure the sample urgently, it takes time to aspirate the sample, which is inconvenient.

In addition, there is a case where a tip of a suction needle may be touched during sample suction to cause an injury, and a sample suction device with high safety is currently demanded.

The present invention has been made in view of the above points, and simplifies the configuration by removing the function of moving the sample container by using the driving source, and a cover is provided to further enhance safety, and the cover must be closed. It is an object of the present invention to provide a highly safe sample suction device in which the sample suction device cannot be started and the cover is not opened during sample suction.

[Means for solving problems]

In order to achieve the above object, a sample suction device equipped with a safety mechanism of the present invention is provided with a stopper 12 as shown in FIGS.
In the sample suction device for holding the sample container 10 sealed by, and sucking the sample in the sample container by moving the thin tubes 28 and 30 to pierce the stopper 12, in order to pierce the stopper 12 of the fixed sample container 10. A cover 40 that can be opened and closed to cover the area where the tips of the thin tubes 28 and 30 move in an exposed state.
And a lock mechanism 48 for preventing the cover from being opened by the movable portion 64 coming into contact with the cover 40 during sample suction, and a detection means 46 for detecting the open / closed state of the cover.

In the device of the present invention, as shown in FIGS.
The sample container 10 may be held on the back side of the cover 70.

Further, as the detection means 46, a switch 50 which is pushed by the cover when the cover 40 is closed can be used, and this switch can be used as a start switch of the sample suction device.

Further, as shown in FIGS. 4 to 6, the above-mentioned lock mechanism is provided with a movable part 94 connected to the drive source 20 and the movable parts 94 and 30 when the cover 70 is closed, even if the thin tubes 28 and 30 are moved forward. When the cover 70 is opened and 94 does not contact, the thin tube 28,
It can be constituted by a projection 92 provided on the cover 70, with which the movable portion 94 abuts even when the 30 tries to move forward.

[Operation] The covers 40 and 70 are opened, the sealed sample container 10 is set, and the covers are closed. When the cover is open, the detection means 46, 90 detect that the cover is open, and prohibit the start of the sample suction device. Since the prohibition is released when the cover is closed, the sample suction device can be started. At the same time as the engine is started, the cover locking mechanism 48 operates, and the cover is locked and cannot be opened. Capillaries of the sample container held by the capillary tubes 28 and 30 of the sample suction device advanced.
Stick 12 and aspirate the sample in the container. When suction is completed, the tubule retracts. Since the cover is unlocked, open the cover and take out the sample container.

If the detection means 46 is the switch 50 that is pushed by the cover when the cover is closed, this switch can start the sample suction device.

When the movable portion 94 of the lock mechanism 48 is connected to the drive source 20, the movable portion 94 moves together with the thin tube to come into contact with the protrusion 92, and the cover is locked.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, unless otherwise specified, the materials, shapes, relative positions, etc. of the constituent devices described in this embodiment are not intended to limit the scope of the present invention to them only, and are merely descriptions. It's just an example.

Example 1 FIG. 1 is a perspective view of Example 1 of the sample suction device of the present invention. The guide 16 is attached to the substrate 14 with an inclination of 45 °. A connecting member 24 is attached to a slider 18 which can be linearly moved back and forth along a guide 16. Connector
The movable portion 22 of the drive source 20 is connected to 24. As the drive source, for example, an air cylinder is used. At this time, the piston rod becomes a movable part. In addition, the connector
A thin tube holder 26, to which thin tubes 28 and 30 are joined, is attached to 24. The capillary holder 26 is attached to the connector 24 so that the axial direction of the capillary and the moving direction of the slider 18 are the same. A cleaning tank 32 having a hollow interior is attached to the substrate 14. The thin tubes 28 and 30 can penetrate the cleaning tank 32. Holders 36 and 38 for holding the sample container 10 are provided on the opposite side of the thin tube holder 26 across the cleaning tank 32 from the substrate 14
Is attached to. The sample container 10 is held in a state in which the stopper 12 made of rubber or the like is set downward and the sample container 10 is inclined at an angle of 45 ° which is the moving direction of the thin tube. At the place where the bottom of the sample container 10 is located when the sample container 10 is correctly held by the holders 36, 38, a reverse holding prevention member 39 having a recess 39a shaped so that the bottom can fit with a small gap is provided. Has been. Since the plug 12 has a different shape from the bottom, it does not fit into the recess 39a. Therefore, even if the sample container 10 is set in the opposite direction, it is not held by the holders 36 and 38. Therefore, the direction of setting the sample container will not be wrong.

When the drive source 20 operates and the movable part 22 moves obliquely upward, the thin tubes 28, 30 move forward, and their sharp tips come out of the washing tank 32 and pierce the stopper 12 of the sample container 10. The thin tube 28 is connected to a suction device (not shown) such as a syringe to suck the sample. Air is supplied to the inside of the container when the sample is sucked by the thin tube 30. As a result, the inside of the container can be brought to almost atmospheric pressure, which facilitates the suction of the sample. The aspirated sample is analyzed after processing such as quantification and dilution.

When the sample suction is completed, the drive source 20 moves in the reverse direction and
28 and 30 retreat. The tips of the thin tubes 28, 30 are pulled back into the cleaning tank 32. The cleaning liquid is supplied to the thin tubes 28 and 30 and is discharged from the openings of the respective tip portions, so that the thin tubes 28 and 30 are washed away and the inner walls of the thin tubes 28 and 30 are washed. Further, a cleaning liquid is supplied from a supply port (not shown) provided above the cleaning tank 32, and the outer walls of the thin tubes 28 and 30 and the inner wall of the cleaning tank 32 are cleaned. These drainage liquids are discharged from a discharge port 34 provided at the bottom of the cleaning tank 32.

In the sample suction device of the present invention, in order to improve safety, the cover 40, the detection means 46, and the lock mechanism are further added.
48 is added. The cover 40 can be opened and closed to cover the region where the sharp tip end of the thin tube moves in an exposed state. The detection unit 46 can control the start of the sample suction device by detecting the open / closed state of the cover 40. The locking mechanism 48 covers the cover 40 during operation of the sample aspirator.
I can't open the door. Cover 40
For example, it is made of a semitransparent synthetic resin and is rotatably attached by shafts 42 and 44. Therefore, the cover 40 has a shaft 42,
It rotates around 44 and is opened and closed. When the cover 40 is closed, in this embodiment, the cover 40 covers the entire held sample container.

FIG. 2 shows the detection means 46 seen from the arrow A in FIG. The switch 50 is attached to a fixture 54 attached to the substrate 14. A hole 56 is provided in the fixture 54 so that the push button 52 of the switch 50 can be pushed,
The cover 40 is provided with a protrusion 58. Switch 50
Is a switch for starting the sample suction device. The holes 56 in the fixture 54 are small so that the pushbutton 52 of the switch 50 is not accidentally pressed when the cover 40 is open. Therefore, the sample suction device does not start.

When the cover 40 is closed, the protrusion 58 of the cover 40 can pass through the hole 56, and if the cover 40 is further pushed, the protrusion 58 pushes the push button 52, so that the sample suction device starts operating. . In this way, the sample suction device can be started only by the operation of closing the cover 40, which is convenient.

FIG. 3 shows the lock mechanism 48 as seen from the arrow B in FIG.
Is shown. The air cylinder 62 is mounted on the board by the fixture 60.
It is attached to 14. Moving part 64 of air cylinder 62
A hole 66 is provided at the position of the cover 40 corresponding to.

When the movable part 64 is retracted (when it is contracted to the left in FIG. 3), the movable part 64 is not inserted into the hole 66 at all or only slightly, so that the cover 40 is not inserted. The movable portion 64 does not come into contact with the hole 66 even when it is rotated about the shafts 42 and 44. That is, the cover 40 can be opened.

If compressed air is supplied to the air cylinder 62 and the movable portion 64 moves forward (jumps to the right in FIG. 3), the movable portion 64 will be fully inserted into the hole 66, so the cover 40
When trying to open, the movable part 64 comes into contact with the hole 66. Therefore, the cover 40 cannot be opened.

When the switch 50 is pressed, the sample suction device is started and the lock mechanism 48 is also operated so that the cover 40 cannot be opened. Therefore, it is safe because there is no risk of injury while touching the tip of the thin tube during sample suction. The lock is released when the sample is completely sucked. Therefore, it is possible to open the cover 40 and take out the sample container.

Now, the lock mechanism of the cover can be easily implemented in various ways if the movable part moves so as to come into contact with the hole, groove or wall of the cover 40.

Further, if a sensor that emits a signal according to the open / closed state of the cover is used as the detection means, the start switch of the sample suction device can be enabled or disabled by using the signal.

Embodiment 2 FIG. 4 is a perspective view of Embodiment 2 of the sample suction device of the present invention. In the second embodiment, the sample container 10 is held behind the cover 70 and moved together with the cover 70. FIG. 5 is a side view of the cover seen from the arrow C in FIG. A hole 74 is provided on the back side of the cover 70, and notches 76 and 80 are provided in a part of the hole 74. The notches 76 and 80 are provided with holders 78 and 82 made of leaf springs, respectively, so that the sample container 10 can be gripped. FIG. 6 is a sectional view taken along line DD in FIG. The retainer 78 partially penetrates inside the hole 74. Hole the sample container 10 from the bottom
When placed in 74, the bottom is usually spherical, so retainer 78
Is pushed by the outer peripheral wall of the sample container 10 and gradually spread, and finally the sample container 10 can be firmly held. If the sample container 10 is prevented from entering the hole 74 from the stopper, or the stopper is contacted with the holder 78, the sample container 10 cannot be inserted into the hole 74, so the holding direction of the sample container is wrong. There is no such thing. The cover 70 can rotate about an axis 86 supported by a support 84. That is, the cover 70 can be opened and closed. A handle 88 is provided on the cover 70 to facilitate opening and closing. In the second embodiment, the sample container 10
It is safer to set the holders 78 and 82 because it is not necessary to put the hands in the moving areas of the capillaries 28 and 30.

Detecting means 90 for detecting the open / closed state of the cover 70 is provided further inside the cover 70 when the sample suction device is viewed from the front, and the detecting means 90 also serves as a start switch.
The sample suction device can be started by closing and pressing the cover 70.

Next, the lock mechanism will be described. Moving part of drive source 20
The connecting member 24 connected to the movable member 94 is a rod-shaped member.
Is attached. Therefore, the movable portion 94 is driven by the drive source 20.
Allows the same movement as a thin tube. The cover 70 is provided with a fan-shaped projection 92. When the cover 70 is closed, the movable portion 94 does not come into contact with the protrusion 92 even when the thin tubes 28 and 30 move forward. However, when the cover 70 is opened, even if the thin tubes 28 and 30 try to move forward, the movable portion 94
Contacts the contact surface 92a of the projection 92, so that the thin tubes 28, 30 cannot move forward. Therefore, it is extremely safe.

Further, if a sensor for confirming the position of the connecting tool 24 is provided, it is useful because the operation of the sample suction device can be confirmed. 96 and 98 are sensors.

[Effect of device]

Since the sample suction device of the present invention is configured as described above, it has the following effects.

(A) In claim 1, since the function of moving the sample container is deleted, the structure can be configured inexpensively and easily. Further, since the sample container can be easily set by opening the cover, it can be used without problems even when an urgent measurement is required.

Further, when the cover is open, the detection means can prohibit the start of the sample suction device, and the lock mechanism prevents the cover from being opened during sample suction, so it is safe. is there.

(B) In claim 2, since the sample container is held on the back side of the cover, it is not necessary to put a hand in the moving region of the capillary when the cover is opened and the sample container is set. Therefore, even if the detection means malfunctions due to the influence of noise or the like and the drive source starts to operate, there is no injury,
It is even safer.

(C) In claim 3, the sample suction device can be started only by closing and pressing the cover, which is extremely convenient.

(D) In claim 4, when the cover is opened, even if the drive source starts to operate due to the influence of noise or the like, a protrusion provided with a movable portion connected to the drive source on the cover. It is extremely safe because it comes into contact with the tube and the capillary cannot move forward.

[Brief description of drawings]

FIG. 1 shows Embodiment 1 of the present invention, and is a perspective view of a sample suction device equipped with a safety mechanism as seen from almost the front, and FIG. 2 is a top view showing one embodiment of the detection means in FIG. (First
3 is a side view showing an embodiment of the lock mechanism in FIG. 1 (partial view seen from arrow B in FIG. 1), and FIG. FIG. 5 shows Embodiment 2 and is a perspective view of a sample suction device provided with a safety mechanism as seen from almost the front, and FIG. 5 is a top view of the cover surrounding in FIG. 4 (partial view seen from arrow C in FIG. 4). ), And FIG. 6 is a sectional view around the cover (a sectional view taken along the line D-D in FIG. 5). 10 ... Sample container, 12 ... Stopper, 14 ... Substrate, 16 ... Guide, 18 ... Slider, 20 ... Drive source, 22 ... Movable part, 24 ... Coupling tool, 28, 30
… Capillary tube, 32… Cleaning tank, 34… Discharge port, 36, 38… Holder, 39
... Reverse holding prevention member, 39a ... Recessed portion, 40 ... Cover, 42, 44 ...
Axis, 46 ... Detecting means, 48 ... Lock mechanism, 50 ... Switch, 52
... push button, 54 ... fixture, 56 ... hole, 58 ... protrusion, 60 ... fixture, 62 ... air cylinder, 64 ... movable part, 66 ... hole, 70 ... cover, 74 ... hole, 76, 80 ... notch, 78, 82 ... Retaining tool, 84 ... Supporting tool, 86 ... Shaft, 88 ... Handle, 90 ... Detecting means, 92 ... Projection, 92
a ... abutting surface, 94 ... movable part, 96, 98 ... sensor

Claims (4)

[Scope of utility model registration request] 1. A sample container sealed by a stopper is held,
In a sample suction device that sucks the sample in the sample container by moving the thin tube and piercing the stopper, the tip end of the thin tube for piercing the stopper of the fixed sample container can cover the area where it moves exposed It is characterized in that a possible cover, a detection means for detecting the open / closed state of the cover, and a lock mechanism for preventing the cover from being opened by the movable portion coming into contact with the cover during sample suction are provided. Sample suction device with safety mechanism. 2. A sample suction device having a safety mechanism according to claim 1, wherein the sample container is held on the back side of the cover. 3. A sample suction device having a safety mechanism according to claim 1, wherein the detection means is a switch pushed by the cover when the cover is closed, and the switch is a start switch of the sample suction device. . 4. The lock mechanism has a movable part connected to a drive source, and when the cover is closed, the movable part does not come into contact with the movable part even when the thin tube advances, and when the cover is opened, The sample suction device provided with the safety mechanism according to claim 1, 2 or 3, which comprises a protrusion provided on the cover with which the movable portion comes into contact even when the sample is moved forward.