JP2013050424A - Surface gas collecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface gas collecting device capable of efficiently collecting surface gas in a short time.SOLUTION: A surface gas collecting device 1 is equipped with a cylindrical member 11 with a cylinder shape; and a moving member 12 provided in the cylindrical member 11 so as to move in an axial direction of the cylindrical member 11. A collecting chamber 14 of surface gas is composed of the cylindrical member 11, a moving member 12, and a skin surface Sa. The moving member 12 is formed so as to change pressure by chancing the volume of the collecting chamber 14. The collecting chamber 14 is formed so as to lead out gas in the inside to a surface gas reservoir chamber 31 through an outlet 21 provided on the cylindrical member 11, by the decrease of the volume caused by the movement of the moving member 12.

Description

  The present invention relates to a surface gas sampling device.

  In recent years, a small amount of gas (surface gas) released from the skin surface of a living body (mainly a human body) is collected, and the health condition of the measurement subject is grasped by analyzing the components. . As such a surface gas sampling device, the pressure in the space (collecting chamber) in which the surface gas is collected is collected in substantially the same state as the external atmospheric pressure (see, for example, Patent Document 1), and the pressure in the sampling chamber is compared with the external atmospheric pressure. That are collected in a low state (see, for example, Patent Document 2). And in the surface gas sampling device that lowers the pressure of the sampling chamber as compared to the external pressure as in Patent Document 2, that is, the negative pressure of the sampling chamber, the release of surface gas from the skin surface is promoted, There is an advantage that the surface gas can be collected in a short time.

JP 2006-214747 A JP 2005-214855 A

  By the way, the surface gas sampling device described in Patent Document 2 includes a hemispherical chamber constituting a sampling chamber with the skin surface, a cylinder connected to the chamber via a valve such as a three-way stopcock, and the like. And a piston to be inserted. When collecting the surface gas using this surface gas sampling device, first, the opening of the chamber is brought into close contact with the skin surface, and the carrier gas previously filled in the cylinder is sent to the chamber to collect it (inside the chamber) The air is replaced with a carrier gas. Then, a certain amount of carrier gas is returned from the chamber into the cylinder, and the collection chamber is held at a negative pressure for a certain period of time, and then the surface gas released into the collection chamber is sucked into the cylinder.

  As described above, in the configuration of Patent Document 2, the surface gas is collected by sucking the internal gas containing the surface gas into the cylinder from the collection chamber in a negative pressure state. Tends to remain. Therefore, in the conventional configuration, the surface gas cannot be efficiently collected, and there is still room for improvement in this respect.

  The present invention has been made paying attention to such problems existing in the prior art, and an object of the present invention is to provide a surface gas sampling device that can efficiently collect surface gas in a short time. It is in.

  In order to achieve the above object, the present invention includes a tubular member, a movable member provided to be movable in the axial direction of the tubular member within the tubular member, the tubular member, and the movable member. An outlet for connecting a surface gas storage chamber for storing the surface gas to the sampling chamber, and the sampling chamber and the surface gas storage via the outlet; Outlet port opening / closing means for controlling the movement of gas to and from the chamber, and the movable member moves in the axial direction within the cylindrical member to change the volume of the sampling chamber. The sampling chamber is formed so that the internal gas is led out from the outlet to the surface gas storage chamber due to a decrease in volume accompanying the movement of the movable member. Features.

  In the surface gas collection device, the outlet opening / closing means allows gas to move from the collection chamber side to the surface gas storage chamber side, while allowing gas to flow from the surface gas storage chamber side to the collection chamber side. It is preferably configured to restrict movement.

The surface gas sampling device preferably includes a surface gas suction means for sucking the gas in the collection chamber into the surface gas storage chamber.
In the surface gas sampling device, an inlet for connecting a carrier gas storage chamber for storing a carrier gas, which is provided in the sampling chamber, to the sampling chamber, the sampling chamber via the inlet, and the carrier gas storage It is preferable to provide an inlet opening / closing means for controlling the movement of gas to and from the chamber.

  In the surface gas collection device, the inlet opening / closing means regulates the movement of gas from the collection chamber side to the carrier gas storage chamber side, while the gas from the carrier gas storage chamber side to the collection chamber side It is preferably configured to allow movement.

The surface gas collection device preferably includes a carrier gas delivery means for delivering the carrier gas stored in the carrier gas storage chamber to the collection chamber.
The surface gas sampling device preferably includes a pressure sensor for detecting the pressure in the sampling chamber.

The surface gas sampling device preferably includes a timer for measuring time.
In the surface gas sampling device, at least one of a driving device that moves the movable member, a pressure sensor that detects the pressure of the sampling chamber, and a timer that measures time, and an output of at least one of the pressure sensor and the timer And a control device for controlling the operation of the drive device based on the above.

In the surface gas sampling device, it is preferable that the sampling chamber is configured by the cylindrical member, the movable member, and a living body skin in contact with an opening on one end side of the cylindrical member.
The surface gas sampling device includes a lid member that closes an opening on one end side of the cylindrical member, and the sampling chamber is configured by the cylindrical member, the movable member, and the lid member. Is preferred.

  ADVANTAGE OF THE INVENTION According to this invention, the surface gas sampling apparatus which can extract | collect surface gas efficiently in a short time can be provided.

The perspective view which shows schematic structure of the surface gas sampling apparatus of 1st Embodiment of this invention. Sectional drawing which shows schematic structure of the surface gas sampling apparatus of 1st Embodiment. (A)-(c) The schematic diagram which shows extraction operation | movement of the surface gas by the surface gas extraction apparatus of 1st Embodiment. Sectional drawing which shows schematic structure of the collection | recovery unit in the surface gas collection apparatus of 2nd Embodiment. Sectional drawing which shows schematic structure of the collection | recovery unit in the surface gas collection apparatus of 3rd Embodiment. Sectional drawing which shows schematic structure of the collection | recovery unit in the surface gas sampling device of another example. Sectional drawing which shows schematic structure of the collection | recovery unit in the surface gas sampling device of another example.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.
A surface gas sampling apparatus 1 shown in FIG. 1 directly collects a surface gas released from the skin surface of a human body. As shown in FIG. 1, the surface gas sampling device 1 includes a sampling unit 2 attached to a measurement site (an arm in the present embodiment) S of the measurement subject, and a main body unit 3. The sampling unit 2 and the main unit 3 are connected to each other through a first vent pipe 5 and a second vent pipe 6 serving as gas flow paths and a signal line 7 for transmitting a control signal and the like.

  The collection unit 2 is formed in a substantially cylindrical shape, and a pair of bands 8 formed in a band shape are fixed to the outer periphery of the collection unit 2. Hook fasteners 9a and 9b are provided at the front ends of the bands 8, respectively. The sampling unit 2 is attached to the measurement site S by bringing the surface fasteners 9a and 9b into contact with each other with the band 8 surrounding the measurement site S.

  As shown in FIG. 2, the sampling unit 2 includes a cylindrical tubular member 11 having both ends opened, a movable member 12 that is accommodated in the tubular member 11 so as to be movable in the axial direction, and the movable member 12. And a driving device 13 to be moved. In the present embodiment, the movable member 12, the cylindrical member 11, and the skin surface Sa of the measurement site S constitute a collection chamber 14 for collecting the surface gas released from the skin surface Sa. ing.

  More specifically, the cylindrical member 11 is formed with a lead-out port 21 and a lead-in port 22 that communicate between the inside and the outside. In the present embodiment, the outlet 21 and the inlet 22 are formed in the vicinity of one end (the lower end in FIG. 2) of the cylindrical member 11. The outlet 21 and the inlet 22 are formed at positions facing each other across the center of the cylindrical member 11. One end of the first vent pipe 5 is connected to the outlet 21, and one end of the second vent pipe 6 is connected to the inlet 22. A pair of rail portions 23 extending in the axial direction are formed in the vicinity of the outlet 21 and the inlet 22 on the inner peripheral surface of the cylindrical member 11.

  The movable member 12 is formed so that the internal pressure can be changed by moving in the axial direction within the cylindrical member 11 and changing the volume of the sampling chamber 14. Specifically, the movable member 12 is formed in a disk shape having an outer diameter substantially equal to the inner diameter of the cylindrical member 11, and the outer peripheral edge of the movable member 12 is fitted to each rail portion 23. A concavity 24 is formed. The outer peripheral surface of the movable member 12 is in close contact with the inner peripheral surface of the cylindrical member 11 over the entire circumference thereof, and gas movement between the cylindrical member 11 and the movable member 12 is blocked. It is formed so that. Thereby, the pressure of the collection chamber 14 is changed with the movement of the movable member 12.

  Moreover, the plate | board thickness of the movable member 12 is formed in the thickness which obstruct | occludes the 1st and 2nd ventilation pipes 5 and 6 in the state which the movable member 12 contacted the skin surface Sa (FIG. 3 (a)). reference). Further, a housing recess 25 is formed on the surface of the movable member 12 facing the skin surface Sa, and a pressure sensor 26 that detects the pressure in the collection chamber 14 is provided in the housing recess 25.

  The driving device 13 includes a motor 27 fixed to the other end (upper end in FIG. 2) of the cylindrical member 11, a rotating cylinder 28 rotated by the motor 27, and a screw shaft 29 screwed into the rotating cylinder 28. I have. The screw shaft 29 is fixed to the approximate center of the movable member 12. The movable member 12 moves along the axial direction of the cylindrical member 11 when the screw shaft 29 protrudes and retracts from the rotating cylinder 28 with the rotation of the rotating cylinder 28 by the motor 27.

  The main unit 3 controls operations of the surface gas storage chamber 31 that stores the surface gas released into the collection chamber 14, the carrier gas storage chamber 32 that stores the carrier gas supplied to the collection chamber 14, and the drive device 13. And a control device 33. In addition, inert gas, such as nitrogen gas, is employ | adopted for the carrier gas of this embodiment. Further, the surface gas storage chamber 31 and the carrier gas storage chamber 32 are each constituted by a box-shaped container.

  The other end of the first vent pipe 5 is connected to the surface gas storage chamber 31, and the surface gas storage chamber 31 communicates with the collection chamber 14 via the first vent pipe 5 and the outlet port 21. And in the middle of the 1st ventilation pipe 5, the 1st backflow prevention valve 35 as an outlet opening / closing means is provided. The first backflow prevention valve 35 allows gas movement from the collection chamber 14 side to the surface gas storage chamber 31 side, while restricting gas movement from the surface gas storage chamber 31 side to the collection chamber 14 side. It is configured.

  Further, a suction pump 36 as a surface gas suction means is connected to the surface gas storage chamber 31. The operation of the suction pump 36 is controlled by the control device 33, and the gas inside the collection chamber 14 is sucked into the surface gas storage chamber 31.

  The other end of the second vent pipe 6 is connected to the carrier gas storage chamber 32, and the carrier gas storage chamber 32 communicates with the collection chamber 14 via the second vent pipe 6 and the introduction port 22. A second backflow prevention valve 37 as an inlet opening / closing means is provided in the middle of the second vent pipe 6. The second backflow prevention valve 37 restricts the movement of gas from the collection chamber 14 side to the carrier gas storage chamber 32 side, while allowing the movement of gas from the carrier gas storage chamber 32 side to the collection chamber 14 side. It is configured.

  The carrier gas storage chamber 32 is connected to a delivery pump 38 as a carrier gas delivery means. The operation of the delivery pump 38 is controlled by the control device 33, and the carrier gas in the carrier gas storage chamber 32 is delivered to the collection chamber 14.

  The drive device 13 and the pressure sensor 26 are connected to the control device 33 via the signal line 7. The control device 33 is provided with a timer 39 that measures time. And the control apparatus 33 moves the movable member 12 by controlling the motor 27 based on the output of the timer 39 and the pressure sensor 26, and extracts surface gas automatically. The degree of negative pressure (target pressure) in the collection chamber 14 at the start of collection and the time (predetermined time) that the collection chamber 14 is held in a negative pressure are set in advance according to the type of the target surface gas. Has been.

Next, the surface gas sampling operation by the surface gas sampling apparatus of this embodiment will be described.
As shown in FIG. 3A, in a state where the movable member 12 is positioned at one end of the cylindrical member 11, the opening 11a on one end side of the cylindrical member 11 is brought into close contact with the skin surface Sa. 2 is attached to the measurement site S.

  Subsequently, for example, when the measurement subject operates a start switch (not shown), the control device 33 drives the drive device 13 to move the movable member 12 in addition to the cylindrical member 11 as shown in FIG. By moving to the end side and increasing the volume of the collection chamber 14, the collection chamber 14 is set to a negative pressure. At this time, the control device 33 also drives the delivery pump 38 to deliver the carrier gas stored in the carrier gas storage chamber 32 to the collection chamber 14 via the second vent pipe 6. As a result, the carrier gas in the carrier gas storage chamber 32 is introduced into the collection chamber 14. The introduction of gas from the surface gas storage chamber 31 into the collection chamber 14 is regulated by the first backflow prevention valve 35. When the pressure value in the collection chamber 14 detected by the pressure sensor 26 reaches the target pressure, the control device 33 stops the delivery pump 38, resets the timer 39, and holds the collection chamber 14 in a negative pressure state. Start measuring the time to start. In the present embodiment, since the inner diameter of the second vent pipe 6 is formed small, the amount of carrier gas introduced by the pressure difference between the carrier gas storage chamber 32 and the sampling chamber 14 is small, and sampling is performed for a predetermined time. The chamber 14 is kept in a negative pressure state.

  Subsequently, as shown in FIG. 3C, the control device 33 moves the movable member 12 to one end side of the cylindrical member 11 when the time measured by the timer 39 elapses, and the sampling chamber 14. By reducing the volume of the gas, the gas inside the collection chamber 14 containing the surface gas is led to the surface gas storage chamber 31 through the first vent pipe 5. At this time, the control device 33 sucks the surface gas released into the collection chamber 14 by driving the suction pump 36 together. In addition, the second backflow prevention valve 37 restricts the extraction of gas from the collection chamber 14 to the carrier gas storage chamber 32. And the control apparatus 33 moves the movable member 12 until it is located in the end of the cylindrical member 11, and makes it contact the skin surface Sa, and as shown to Fig.3 (a), the volume of the collection chamber 14 is made into substantially zero. This completes the sampling of the surface gas.

As described above, according to the present embodiment, the following operational effects can be achieved.
(1) The surface gas sampling device 1 includes a tubular member 11 and a movable member 12 provided so as to be movable in the axial direction within the tubular member 11, and the tubular member 11, the movable member 12, The collection chamber 14 was constituted by the skin surface Sa. The movable member 12 was formed so that its pressure could be changed by changing the volume of the collection chamber 14. The sampling chamber 14 was formed such that the internal gas was led out from the outlet 21 provided in the cylindrical member 11 to the surface gas storage chamber 31 due to a decrease in volume accompanying the movement of the movable member 12.

  According to the above configuration, by moving the movable member 12 so as to increase the volume of the collection chamber 14, the collection chamber 14 becomes negative pressure, and the surface gas can be collected in a short time. Then, after holding the collection chamber 14 at a negative pressure for a certain period of time, the movable member 12 is moved so that the volume of the collection chamber 14 is reduced, thereby extracting and collecting the surface gas from the outlet 21. be able to. Therefore, in the configuration in which the surface gas is collected by the cylinder and the piston connected to the collection chamber as in Patent Document 2, only the volume of the cylinder can be collected, whereas much surface gas remains in the collection chamber. In the above configuration, it is possible to suppress a large amount of surface gas from remaining in the collection chamber 14. In particular, as in the present embodiment, by moving the movable member 12 so that the volume of the collection chamber 14 becomes substantially zero, the surface gas released into the collection chamber 14 is led to the surface gas storage chamber 31 without substantially remaining. can do. Thereby, the surface gas discharged | emitted from the skin surface Sa can be extract | collected efficiently in a short time.

  (2) The first backflow prevention valve 35 provided in the first vent pipe 5 connected to the outlet 21 allows gas to move from the collection chamber 14 side to the surface gas storage chamber 31 side, while surface gas It was comprised so that the movement of the gas from the storage chamber 31 side to the collection chamber 14 side might be controlled. According to the above configuration, it is not necessary to separately control the opening and closing of the outlet 21, and the surface gas can be derived from the collection chamber 14 to the surface gas storage chamber 31 only by moving the movable member 12.

  (3) Since the suction pump 36 for sucking the surface gas released into the collection chamber 14 into the surface gas storage chamber 31 is provided, the surface gas can be smoothly led out from the collection chamber 14 to the surface gas storage chamber 31. .

(4) The carrier gas storage chamber 32 is connected to the collection chamber 14 via the inlet 22 so that the carrier gas is introduced into the collection chamber 14.
Here, when the viscosity of the surface gas to be collected is high, the distribution of the surface gas in the collection chamber 14 may be biased. On the other hand, when concentrating and sensing (analyzing) the surface gas, it is desirable that the concentration of the surface gas derived from the collection chamber 14 is uniform, but the surface gas distribution is uneven as described above. As a result, the concentration of the derived surface gas varies. In this regard, according to the above configuration, even when the viscosity of the surface gas to be collected is high, the distribution of the surface gas in the collection chamber 14 is biased by using a carrier gas having a lower viscosity than the surface gas. It is possible to suppress and obtain a uniform distribution. This enables more efficient and accurate gas sensing.

  (5) The second backflow prevention valve 37 provided in the second vent pipe 6 connected to the introduction port 22 regulates the movement of gas from the collection chamber 14 side to the carrier gas storage chamber 32 side, while the carrier gas The gas was allowed to move from the storage chamber 32 side to the collection chamber 14 side. According to the above configuration, the carrier gas can be introduced from the carrier gas storage chamber 32 to the collection chamber 14 only by moving the movable member 12 without separately controlling the opening and closing of the introduction port 22.

  (6) Since the delivery pump 38 for sending the carrier gas stored in the carrier gas storage chamber 32 to the collection chamber 14 is provided, the carrier gas can be smoothly introduced from the carrier gas storage chamber 32 to the collection chamber 14. .

  (7) The surface gas sampling device 1 includes a driving device 13 that moves the movable member 12, a pressure sensor 26 that detects the pressure in the sampling chamber 14, a timer 39 that measures time, and the pressure sensor 26 and the timer 39. And a control device 33 for controlling the operation of the drive device 13 based on the output. According to the said structure, the target surface gas can be extract | collected automatically and a worker's burden can be reduced.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 4, the movable member 12 is formed with a grip 41 that protrudes to the other end of the cylindrical member 11, and the other end of the cylindrical member 11 is open to the outside. A measuring instrument 43 having a timer 42 for measuring time is fixed to the outer peripheral surface of the cylindrical member 11. The measuring instrument 43 of the present embodiment includes an operation unit 43a and a display unit 43b, and is configured such that the timer 42 can be manually operated and the measurement time of the timer 42 can be visually recognized. Further, the pressure detected by the pressure sensor 26 provided by the movable member 12 is displayed on the display unit 43 b of the measuring instrument 43. In the present embodiment, the suction pump 36 and the delivery pump 38 (not shown in FIG. 4) can be manually operated.

  In the surface gas sampling device 1 configured in this way, after the sampling unit 2 is mounted on the measurement site S, the movable member 12 holds the grip portion 41, for example, in the same procedure as in the first embodiment. The surface gas is collected by moving.

As described above, according to the present embodiment, in addition to the effects (1) to (6) of the first embodiment, the following effects can be achieved.
(8) Since the grip portion 41 is provided on the movable member 12 and the movable member 12 is manually moved, the surface gas can be collected with a simple configuration.

(9) Since the pressure sensor 26 for detecting the pressure in the collection chamber 14 is provided, the pressure in the collection chamber 14 can be accurately adjusted to a value corresponding to the type of the target surface gas.
(10) Since the timer 42 is provided, it is possible to easily collect the surface gas by setting the collection chamber 14 to a negative pressure for a time corresponding to the type of the desired surface gas, the required amount of surface gas, and the like.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  A surface gas sampling apparatus 1 shown in FIG. 5 collects surface gas from a collection target such as clothes worn by a measurement subject. The surface gas sampling device 1 includes a lid member 51 that closes the opening 11 a on one end side of the cylindrical member 11. In the present embodiment, the collection chamber 14 is configured by the movable member 12, the cylindrical member 11, and the lid member 51.

  The lid member 51 is formed in a disc shape having an outer diameter substantially equal to the outer diameter of the cylindrical member 11, and one portion of the outer peripheral edge is rotatably connected to the cylindrical member 11 via a hinge 52. Has been. An engaging claw 53 is formed at a position facing the hinge 52 on the outer peripheral edge of the lid member 51. On the other hand, on the outer peripheral surface of the cylindrical member 11, an engagement protrusion 54 that engages with the engagement claw 53 is formed. Then, by engaging the engaging claw 53 with the engaging protrusion 54, the position of the lid member 51 is fixed (locked) while the opening 11a is closed. The lid member 51 is formed so that the gas movement between the opening 11 a and the lid member 51 is blocked while the engagement claw 53 is engaged with the engagement protrusion 54.

  In the surface gas sampling device 1 configured as described above, the opening 11 a of the cylindrical member 11 is opened and the sampling target W is put into the sampling chamber 14, and then the opening 11 a is closed by the lid member 51. For example, when the user operates a start switch (not shown), the control device 33 moves the movable member 12 by the driving device 13 and collects the surface gas in the same procedure as in the first embodiment. Thereby, the surface gas discharged | emitted from the to-be-measured person's skin surface Sa can be extract | collected indirectly in a short time efficiently.

As described above, according to the present embodiment, the same operational effects as the operational effects of the first embodiment can be achieved.
In addition, each said embodiment can also be implemented in the following aspects which changed this suitably.

  In the first embodiment, the outlet 21 and the inlet 22 are provided in the tubular member 11, but not limited to this, at least one of the outlet 21 and the inlet 22 may be provided in the movable member 12. Specifically, as shown in FIG. 6, for example, the outlet port 21 may be formed in the movable member 12 and the inlet port 22 may be formed in the cylindrical member 11. Similarly, in the second and third embodiments, the movable member 12 or the lid member 51 may be provided with at least one of the outlet 21 and the inlet 22.

  -In the said 1st Embodiment, although the carrier gas storage chamber 32 was connected to the collection chamber 14, not only this but the structure where only the surface gas storage chamber 31 is connected to the collection chamber 14, as shown, for example in FIG. It is good. Similarly, in the second and third embodiments, only the surface gas storage chamber 31 may be connected to the collection chamber 14. In this configuration, the surface gas is released in a state where the inside of the collection chamber 14 is filled with air, and the surface gas is led to the surface gas storage chamber 31 together with the air.

  In the third embodiment, the movable member 12 is moved by the driving device 13. However, the present invention is not limited to this, and the movable member 12 is provided with a grip portion and manually moved as in the second embodiment. Also good.

  In each of the above embodiments, the surface gas sampling device 1 includes the suction pump 36 connected to the surface gas storage chamber 31 and the delivery pump 38 connected to the carrier gas storage chamber 32. However, the suction pump 36 and the delivery pump It is good also as a structure provided only with either one of 38. Further, the surface gas sampling device 1 may not include the suction pump 36 and the delivery pump 38.

  In the first and third embodiments, the surface gas sampling device 1 includes the pressure sensor 26 and the timer 39. However, the present invention is not limited thereto, and the surface gas sampling device 1 may include only one of the pressure sensor 26 and the timer 39. Good. Further, the surface gas sampling device 1 may not include the pressure sensor 26 and the timer 39. Similarly, in the second embodiment, the surface gas sampling device 1 may be configured to include only one of the pressure sensor 26 and the measuring instrument 43, or may not include the pressure sensor 26 and the measuring instrument 43. .

  In each of the above-described embodiments, the surface gas suction unit is configured to suck the gas in the collection chamber 14 into the surface gas storage chamber 31 by the suction pump 36. May be configured. Similarly, the carrier gas delivery means may be constituted by, for example, a cylinder and a piston.

  In the first and third embodiments, the driving device 13 is configured by the motor 27, the rotary cylinder 28, and the screw shaft 29. However, the driving device 13 is not limited to this, and for example, the driving device 13 is configured by a linear motor and is movable. The member 12 may be moved directly in the axial direction of the cylindrical member 11.

  In each of the above embodiments, the outlet opening / closing means and the inlet opening / closing means are constituted by the first and second backflow prevention valves 35, 37. However, the present invention is not limited to this. For example, the outlet opening / closing means is used as a pressure control valve (relief valve) that allows the gas to be led out to the surface gas storage chamber 31 when the pressure in the collection chamber 14 exceeds a predetermined pressure. It may be configured. Further, for example, the inlet opening / closing means may be configured as a pressure control valve that allows the introduction of the carrier gas when the pressure in the collection chamber 14 becomes a predetermined pressure or less. Even in such a configuration, by moving the movable member 12, the surface gas can be led out from the collection chamber 14 and the carrier gas to the collection chamber 14 without separately controlling the opening and closing of the outlet 21 and the inlet 22. Can be introduced.

Further, the outlet opening / closing means and the inlet opening / closing means may be configured by an electromagnetic valve that opens and closes in response to a control signal from the control device 33, or a manual valve operated by a person to be measured.
In each of the above embodiments, the plate thickness of the movable member 12 is formed so as to close the first and second vent pipes 5 and 6 in a state where the movable member 12 is in contact with the skin surface Sa. However, the present invention is not limited thereto, and the plate thickness of the movable member 12 may be formed such that the first and second vent pipes 5 and 6 are opened in a state where the movable member 12 is in contact with the skin surface Sa.

  In each of the above embodiments, a sealing member such as an O-ring may be interposed between the cylindrical member 11 and the movable member 12. In the third embodiment, a seal member such as an O-ring may be interposed between the tubular member 11 and the lid member 51.

  In each of the above embodiments, the rail portion 23 is formed on the cylindrical member 11 and the fitting recess 24 is formed on the movable member 12. However, the present invention is not limited to this, and the rail portion 23 and the fitting recess 24 are not formed. Also good.

  In the second embodiment, the lid member 51 is provided so as to be rotatable with respect to the tubular member 11 via the hinge 52. However, the present invention is not limited thereto, and the opening 11a on one end side of the tubular member 11 is closed. For example, the lid member 51 may be screwed to one end of the cylindrical member 11.

  In each of the above embodiments, the movable member 12 is formed so that the gas movement between the tubular member 11 and the movable member 12 is blocked. If it can be held, slight gas movement may be allowed.

  In each of the above embodiments, when the surface gas inside the collection chamber 14 is led to the surface gas storage chamber 31, the movable member 12 is moved until it is positioned at one end of the cylindrical member 11, You may stop in the middle of the cylindrical member 11. FIG.

  In the first and second embodiments, the collection unit 2 is mounted on the arm. However, the present invention is not limited to this, and the surface gas may be collected by mounting on the other part such as a foot or abdomen. Moreover, you may make it extract | collect not only the surface gas discharge | released from the skin surface of a human body but the surface gas discharge | released from the skin surface of another animal. Moreover, you may make it extract | collect the surface gas discharge | released from the outer skin surface etc. of the harvested vegetable, for example. In this case, the collection chamber 14 is constituted by the tubular member 11, the movable member 12, and the vegetable skin surface.

  DESCRIPTION OF SYMBOLS 1 ... Surface gas sampling device, 2 ... Sampling unit, 3 ... Main body unit, 11 ... Cylindrical member, 11a ... Opening part, 12 ... Movable member, 13 ... Drive apparatus, 14 ... Sampling chamber, 21 ... Outlet port, 22 ... Inlet, 26 ... Pressure sensor, 31 ... Surface gas storage chamber, 32 ... Carrier gas storage chamber, 33 ... Control device, 35 ... First backflow prevention valve as outlet opening / closing means, 36 ... Suction as surface gas suction means Pump, 37 ... second backflow prevention valve as inlet opening / closing means, 38 ... delivery pump as carrier gas delivery means, 41 ... gripping part, 39, 42 ... timer, 43 ... measuring instrument, 51 ... lid member, S ... Measurement site, Sa ... skin surface, W ... measurement object.

Claims (11)

A tubular member;
A movable member provided to be movable in the axial direction of the cylindrical member within the cylindrical member;
A lead-out port for connecting a surface gas storage chamber for storing a surface gas, which is provided in a surface gas sampling chamber constituted by elements including the cylindrical member and the movable member, to the sampling chamber;
Outlet port opening and closing means for controlling the movement of gas between the collection chamber and the surface gas storage chamber via the outlet port;
The movable member is formed such that the pressure of the collection chamber can be changed by moving in the axial direction within the cylindrical member and changing the volume of the collection chamber,
The surface gas collection device is characterized in that the collection chamber is formed such that an internal gas is led out from the lead-out port to the surface gas storage chamber due to a decrease in volume accompanying movement of the movable member. In the surface gas sampling device according to claim 1,
The outlet opening / closing means is configured to allow gas movement from the collection chamber side to the surface gas storage chamber side, while restricting gas movement from the surface gas storage chamber side to the collection chamber side. A surface gas sampling device characterized by the above. In the surface gas sampling device according to claim 1 or 2,
A surface gas sampling device comprising surface gas suction means for sucking gas in the collection chamber into the surface gas storage chamber. In the surface gas sampling device according to any one of claims 1 to 3,
An inlet provided in the collection chamber for connecting a carrier gas storage chamber for storing a carrier gas to the collection chamber;
A surface gas sampling apparatus comprising: an inlet opening / closing means for controlling gas movement between the sampling chamber and the carrier gas storage chamber via the inlet. The surface gas sampling device according to claim 4,
The introduction port opening / closing means is configured to restrict gas movement from the collection chamber side to the carrier gas storage chamber side, and to allow gas movement from the carrier gas storage chamber side to the collection chamber side. A surface gas sampling device characterized by the above. In the surface gas sampling device according to claim 4 or 5,
A surface gas collection device comprising carrier gas delivery means for delivering the carrier gas stored in the carrier gas storage chamber to the collection chamber. In the surface gas sampling device according to any one of claims 1 to 6,
A surface gas sampling device comprising a pressure sensor for detecting the pressure in the sampling chamber. In the surface gas sampling device according to any one of claims 1 to 7,
A surface gas sampling device comprising a timer for measuring time. In the surface gas sampling device according to any one of claims 1 to 6,
A driving device for moving the movable member;
At least one of a pressure sensor for detecting the pressure in the collection chamber and a timer for measuring time;
A surface gas sampling device comprising: a control device that controls the operation of the drive device based on the output of at least one of the pressure sensor and the timer. In the surface gas sampling device according to any one of claims 1 to 9,
The said collection chamber is comprised by the said cylindrical member, the said movable member, and the living body skin which the opening part of the one end side of the said cylindrical member contacts, The surface gas sampling apparatus characterized by the above-mentioned. In the surface gas sampling device according to any one of claims 1 to 10,
A lid member that closes the opening on one end of the cylindrical member;
The surface gas collection device, wherein the collection chamber is constituted by the cylindrical member, the movable member, and the lid member.

Images