JP5621379B2 - Oxygen supply cutoff device - Google Patents

Description

  The present invention relates to an oxygen supply shut-off device that shuts off an oxygen supply pipe for supplying oxygen.

  Generally, when oxygen inhalation therapy is performed on a patient with chronic respiratory disease, a device called a cannula for aspirating oxygen supplied from an oxygen supply device from the nose is used. As an oxygen supply device that supplies oxygen to a cannula, for example, an adsorption-type oxygen concentrator (see Patent Document 1) that generates nitrogen-enriched gas by adsorbing nitrogen in the air, an oxygen cylinder, and the like are known. . The cannula is composed of a cannula mounting part that is mounted on the patient's nose, and an oxygen supply pipe that is connected to an oxygen supply device at one end and supplies oxygen to the cannula mounting part. Therefore, oxygen supplied from the oxygen supply device is discharged from the outlet of the cannula mounting portion via the oxygen supply pipe.

  Here, for example, when the ambient temperature of the cannula becomes extremely high due to a fire or the like, when stopping the discharge of oxygen from the outlet of the cannula mounting part, the power switch is operated to operate the power source of the oxygen concentrator. It may be possible to stop the operation.

JP 2008-136663 A

  However, if the user is unaware of the need to stop the discharge of oxygen from the outlet of the cannula mounting part and if necessary actions are not taken or if he / she is aware but cannot act, Can not stop the discharge of oxygen.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide an oxygen supply shut-off device that can automatically stop the supply of oxygen through an oxygen supply pipe. .

The oxygen supply shut-off device according to the first aspect of the present invention can be attached to an oxygen supply pipe for supplying oxygen, and when the ambient temperature of the attachment position in the oxygen supply pipe is equal to or higher than a predetermined temperature, the attachment position A shut-off means for shutting off the oxygen supply pipe , wherein the shut-off means is disposed so as to sandwich the oxygen supply pipe, and a pair of shut-off members urged toward each other by the elastic force of a spring portion; And a deformable member that is disposed between the pair of blocking members and is formed of a low-melting-point material that melts when the temperature exceeds the predetermined temperature.

  In the present specification, “the ambient temperature at the mounting position (of the oxygen supply shut-off device)” indicates “the temperature of at least a part of the oxygen supply shut-off device”.

In this oxygen supply device, when the ambient temperature at the mounting position, that is, the temperature of at least a part of the oxygen supply shut-off device becomes equal to or higher than a predetermined temperature, the oxygen supply pipe cuts off oxygen by the oxygen supply pipe. Can automatically stop being supplied.
In this oxygen supply shut-off device, when the deformable member formed of a low melting point material is melted at a predetermined temperature or higher, the shut-off member shuts off the oxygen supply pipe at the mounting position, and oxygen is automatically discharged from the discharge port. Can be stopped.
In the oxygen supply cutoff device according to the second invention, in the oxygen supply cutoff device according to the first invention, the pair of cutoff members are a pair of leg portions respectively disposed at both ends of a spring portion, and The gap between the leg portions is configured to increase as the distance from the spring portion increases, and the oxygen supply pipe and the deformation member are disposed in the gap between the pair of leg portions.

According to a third aspect of the present invention, there is provided the oxygen supply cutoff device according to the first or second aspect of the invention, wherein the oxygen supply pipe is an oxygen discharger having a discharge port, and oxygen is supplied to the discharge port. To supply.

  In this oxygen supply device, when the ambient temperature around the attachment position, that is, the temperature of at least a part of the oxygen supply cutoff device exceeds a predetermined temperature, oxygen is discharged from the discharge port by shutting off the supply of oxygen at the attachment position. Can be automatically stopped. Further, the oxygen flowing out from the discharge port after the oxygen supply pipe is shut off is oxygen remaining on the discharge port side from the mounting position of the oxygen supply shut-off device in the oxygen supply pipe. That is, the amount of remaining oxygen is less than the oxygen present between the oxygen supply device that supplies oxygen to the oxygen supply pipe and the discharge port. Therefore, compared with the case where supply of oxygen from the oxygen supply device to the oxygen supply pipe is stopped, the outflow of oxygen from the discharge port can be stopped quickly. In addition, by attaching an oxygen supply shut-off device to an oxygen discharger having a discharge port, the oxygen supply pipe can be quickly cut off when the oxygen discharged from the discharge port ignites and the temperature of the oxygen discharger rises. .

  As described above, according to the present invention, the following effects can be obtained.

In the first invention, when the ambient temperature at the mounting position, that is, the temperature of at least a part of the oxygen supply shut-off device becomes equal to or higher than a predetermined temperature, the supply of oxygen is shut off at the mounting position, whereby oxygen is supplied by the oxygen supply pipe. Can automatically stop being supplied.
In the first invention, when the deformable member formed of the low melting point material is melted at a predetermined temperature or higher, the shutoff member shuts off the oxygen supply pipe at the mounting position, and oxygen is automatically discharged from the discharge port. Can be stopped.

In the third invention, when the ambient temperature around the mounting position, that is, the temperature of at least a part of the oxygen supply shut-off device is equal to or higher than a predetermined temperature, the oxygen supply is shut off at the mounting position, so that oxygen is discharged from the discharge port. Can be automatically stopped. Further, the oxygen flowing out from the discharge port after the oxygen supply pipe is shut off is oxygen remaining on the discharge port side from the mounting position of the oxygen supply shut-off device in the oxygen supply pipe. That is, the amount of the remaining oxygen is less than the oxygen present between the oxygen supply device that supplies oxygen to the oxygen supply pipe and the discharge port. Therefore, compared with the case where supply of oxygen from the oxygen supply device to the oxygen supply pipe is stopped, the outflow of oxygen from the discharge port can be stopped quickly. In addition, by attaching an oxygen supply shut-off device to an oxygen discharger having a discharge port, the oxygen supply pipe can be quickly cut off when the oxygen discharged from the discharge port ignites and the temperature of the oxygen discharger rises. .

It is a figure showing the state where the oxygen supply interception device concerning a 1st embodiment of the present invention was attached to the cannula. It is a side view of the oxygen supply interruption | blocking instrument shown in FIG. It is a front view of the oxygen supply interruption | blocking instrument shown in FIG. It is a figure which shows the state by which the oxygen supply pipe | tube was interrupted | blocked by the oxygen supply interruption | blocking instrument shown in FIG. It is a figure which shows the oxygen supply interruption | blocking instrument concerning the 1st reference example of this invention. It is a figure which shows the state by which the oxygen supply pipe | tube was interrupted | blocked by the oxygen supply interruption | blocking instrument shown in FIG. It is a figure which shows the oxygen supply interruption | blocking instrument concerning the 2nd reference example of this invention. It is a figure which shows the state by which the oxygen supply pipe | tube was interrupted | blocked by the oxygen supply interruption | blocking instrument shown in FIG. It is a figure which shows the oxygen supply interruption | blocking instrument concerning the 3rd reference example of this invention. It is a figure which shows the state by which the oxygen supply pipe | tube was interrupted | blocked by the oxygen supply interruption | blocking instrument shown in FIG.

[First embodiment]
Hereinafter, a first embodiment of an oxygen supply cutoff device according to the present invention will be described with reference to FIGS.

  The oxygen supply cutoff device 1 of this embodiment is applied to the cannula 60 (oxygen discharger) shown in FIG. The cannula 60 is a device for a patient who performs oxygen inhalation therapy to suck in oxygen supplied from an oxygen supply source (not shown) such as an oxygen concentrator or an oxygen cylinder from the nose. An oxygen supply pipe 65 having flexibility is provided.

  The cannula mounting portion 61 includes a tubular base 62 and a pair of tubular prongs 63 extending from an intermediate portion of the base 62. At the end of the prong portion 63, a discharge port 63a through which oxygen supplied from an oxygen supply source is discharged is formed. When the cannula 60 is mounted on the patient, the base 62 of the cannula mounting part 61 is disposed below the patient's nose, and the pair of prongs 63 are inserted into the nostrils.

  The oxygen supply pipe 65 includes a main pipe 66 having one end connected to the oxygen supply source, and two branch pipes 67 connected to the other end of the main pipe 66 opposite to the side connected to the oxygen supply source. It is configured. The end of each branch pipe 67 opposite to the side connected to the main pipe 66 is connected to both ends of the base 62 of the cannula mounting part 61. Accordingly, oxygen supplied from the oxygen supply source to the cannula 60 first flows into the main pipe 66 of the oxygen supply pipe 65. Then, the oxygen supply pipe 65 is sent to the cannula mounting portion 61 via each branch pipe 67.

  As shown in FIG. 1, the oxygen supply cutoff device 1 is attached to a main pipe 66 of an oxygen supply pipe 65. As shown in FIG.2 and FIG.3, the oxygen supply interruption | blocking instrument 1 has the clip 10 and the supporting member 15 which maintains the clip 10 in an open state.

  The clip 10 is formed of a wire, and includes a coil spring portion 11 and a pair of leg portions 12 and 13 disposed so as to sandwich the main tube 66 on the outer peripheral surface of the oxygen supply tube 65. The leg portions 12 and 13 are provided at both ends of the coil spring portion 11, respectively, and are urged toward each other by the elastic force of the coil spring portion 11.

  The support member 15 is made of a low melting point material that melts when the temperature exceeds a predetermined temperature. As the low melting point material, for example, an alloy of Sn 19%, Bi 53.5%, Pb 17%, In 10.5% having a melting point of about 60 ° C. is used. The support member 15 is disposed between the leg portions 12 and 13 of the clip 10, and the oxygen supply pipe 65 sandwiched between the leg portions 12 and 13 may be deformed in the gap between the leg portions 12 and 13. The legs 12 and 13 are supported so as to maintain a size that is not present (maintained in an open state).

  The leg portions 12 and 13 of the clip 10 correspond to the blocking member of the present invention, and the support member 15 corresponds to the deformable member of the present invention. Further, the clip 10 and the support member 15 correspond to the blocking means of the present invention.

  When the ambient temperature of the oxygen supply shut-off device 1 is lower than the melting point of the support member 15, as shown in FIG. 3, the clip 10 is in an open state and the oxygen supply pipe sandwiched between the legs 12 and 13. 65 is not deformed. And when the ambient temperature of the oxygen supply interruption | blocking instrument 1 rises and becomes more than melting | fusing point of the supporting member 15, the supporting member 15 will melt | dissolve and the clip 10 will be in a closed state, as shown in FIG. At this time, the oxygen supply pipe 65 is crushed by the legs 12 and 13. Thereby, the oxygen supply pipe 65 is shut off at the attachment position of the oxygen supply cutoff device 1. The “ambient temperature of the oxygen supply cutoff device 1” indicates “at least a part of the temperature of the oxygen supply cutoff device”.

  As described above, the oxygen supply cutoff device 1 of the first embodiment is attached to the oxygen supply pipe 65 of the cannula 60 and includes the clip 10 having the leg portions 12 and 13 that sandwich the oxygen supply pipe 65. . When the ambient temperature around the attachment position in the oxygen supply pipe 65 becomes equal to or higher than a predetermined temperature, the oxygen supply pipe 65 can be blocked at the attachment position by crushing the oxygen supply pipe 65 with the legs 12 and 13. Therefore, when the ambient temperature at the mounting position of the oxygen supply cutoff device 1 becomes equal to or higher than the predetermined temperature, oxygen is discharged from the discharge port 63a of the cannula mounting portion 61 by blocking the supply of oxygen at the mounting position. Can be automatically stopped. Further, after the oxygen supply pipe 65 is shut off, oxygen that continues to flow from the discharge port 63a of the cannula mounting part 61 remains on the cannula mounting part 61 side from the mounting position of the oxygen supply blocking device 1 in the oxygen supply pipe 65. It is oxygen. That is, the amount of remaining oxygen is less than the oxygen present between the oxygen supply device that supplies oxygen to the cannula 60 and the cannula mounting portion 61. Therefore, compared with the case where supply of oxygen from the oxygen supply device to the oxygen supply pipe 65 is stopped, it is possible to quickly stop oxygen from continuing to flow from the discharge port 63a of the cannula mounting portion 61. . Further, even when the cannula 60 starts to burn from the side of the cannula mounting portion 61 where the discharge port 63a for discharging oxygen is formed and spreads toward the oxygen supply device, the oxygen supply cutoff device 1 in the oxygen supply pipe 65 is attached. After the oxygen supply pipe 65 is crushed by the oxygen supply shut-off device 1, the discharge of oxygen from the end of the unburned oxygen supply pipe 65 is stopped, and the oxygen supply apparatus side further Can prevent it from spreading.

  Moreover, the oxygen supply interruption | blocking instrument 1 of 1st Embodiment is arrange | positioned so that the oxygen supply pipe | tube 65 may be pinched | interposed, and a pair of leg parts 12 and 13 urged | biased in the direction which mutually approaches, and a pair of leg parts 12 and 13 And a support member 15 made of a low melting point material that melts at a predetermined temperature or higher. Therefore, when the support member 15 formed of the low melting point material is melted at a predetermined temperature or more, the legs 12 and 13 block the oxygen supply pipe 65 at the mounting position, and oxygen is discharged from the cannula mounting portion 61. Can be automatically stopped.

[First Reference Example]
Next, an oxygen supply cutoff device according to a first reference example will be described with reference to FIGS. 5 and 6.

The oxygen supply cutoff device 101 according to this reference example uses a clip 110 formed of a wire made of a shape memory alloy such as a NiTi alloy having a shape recovery temperature of about 70 ° C., for example, instead of the clip 10 of the first embodiment. It was. The shape memory material constituting the clip 110 of the present embodiment is stored so that the clip 110 is in a closed state when the ambient temperature exceeds a predetermined temperature.

  The leg portions 112 and 113 of the clip 110 correspond to the blocking member of the present invention, and the clip 110 corresponds to the blocking member of the present invention.

  When the ambient temperature is lower than the predetermined temperature, as shown in FIG. 5, the clip 110 is in an open state, and the gap between the legs 112 and 113 is sandwiched between the legs 112 and 113. The supply pipe 65 is large enough not to be deformed. And when ambient temperature becomes more than predetermined temperature, as shown in FIG. 6, the leg parts 112 and 113 will deform | transform so that it may mutually approach, and it will be in a closed state. At this time, the oxygen supply pipe 65 is crushed by the legs 112 and 113. Thereby, the oxygen supply pipe 65 is shut off at the attachment position of the oxygen supply cutoff device 101.

As described above, in the oxygen supply shut-off device 101 of the first reference example , the clip 110 having the pair of legs 112 and 113 disposed on the outer periphery of the oxygen supply pipe 65 has a leg at the attachment position when the temperature exceeds a predetermined temperature. The portions 112 and 113 are formed of a shape memory material that is deformed so as to have a shape that blocks the oxygen supply pipe 65. Therefore, when the clip 110 formed of the shape memory substance is deformed when the temperature is higher than the predetermined temperature, the oxygen supply pipe 65 is shut off at the attachment position, and the discharge of oxygen from the cannula mounting portion 61 can be automatically stopped.

[Second Reference Example]
Next, an oxygen supply cutoff device according to a second reference example will be described with reference to FIGS.

The oxygen supply cutoff device 201 according to this reference example is disposed on the outer periphery of the oxygen supply pipe 65 and includes a cladding tube 210 that covers the outer peripheral surface of the oxygen supply pipe 65 over the entire periphery. The cladding tube 210 is made of a heat-shrinkable material such as polyolefin having a shrinkage temperature of about 70 ° C., for example. In a normal state, the inner diameter of the cladding tube 210 is slightly larger than the outer diameter of the oxygen supply tube 65. When the temperature becomes equal to or higher than the heat shrink temperature, the cladding tube 210 contracts, and the inner diameter thereof becomes smaller than the outer diameter of the oxygen supply pipe 65. The cladding tube 210 corresponds to the blocking member and blocking means of the present invention.

  When the ambient temperature is lower than the predetermined temperature, the oxygen supply pipe 65 covered with the cladding pipe 210 is not deformed as shown in FIG. When the ambient temperature becomes equal to or higher than the predetermined temperature, the cladding tube 210 contracts and the oxygen supply tube 65 is crushed by the cladding tube 210 as shown in FIG. Thereby, the oxygen supply pipe 65 is shut off at the attachment position of the oxygen supply cutoff device 201.

As described above, in the oxygen supply cutoff device 201 of the second reference example , the outer periphery of the oxygen supply pipe 65 is formed of a heat-shrinkable material that is deformed so as to shut off the oxygen supply pipe 65 at the mounting position when the temperature exceeds a predetermined temperature. The covered tube 210 is disposed. Accordingly, when the cladding tube 210 formed of the heat-shrinkable material is deformed at a predetermined temperature or more, the oxygen supply tube 65 is shut off at the mounting position, and the discharge of oxygen from the cannula mounting portion 61 can be automatically stopped. .

[Third reference example]
Next, an oxygen supply cutoff device according to a third reference example will be described with reference to FIGS. 9 and 10.

The oxygen supply shut-off device 301 according to this reference example is disposed on the outer periphery of the oxygen supply pipe 65 and covers the outer peripheral surface of the oxygen supply pipe 65 over the entire circumference, and the oxygen supply pipe 65 and the cladding pipe 310. And a thermal foaming agent 311 disposed between the two. As the thermal foaming agent 311, for example, azodicarbonamide having a foaming temperature of about 140 ° C. is used. The inner diameter of the cladding tube 310 is larger than the outer diameter of the oxygen supply pipe 65, and the thermal foaming agent 311 is disposed between the outer peripheral surface of the oxygen supply pipe 65 and the inner peripheral surface of the cladding tube 310.

  The cladding tube 310 corresponds to the blocking member of the present invention, and the cladding tube 310 and the thermal foaming agent 311 correspond to the blocking means of the present invention.

  When the ambient temperature is lower than the predetermined temperature and the thermal foaming agent 311 is not foamed, the oxygen supply pipe 65 covered with the cladding pipe 310 is not deformed as shown in FIG. When the ambient temperature becomes equal to or higher than the predetermined temperature, the thermal foaming agent 311 foams and the oxygen supply pipe 65 is crushed as shown in FIG. Thereby, the oxygen supply pipe 65 is shut off at the attachment position of the oxygen supply cutoff device 301.

As described above, the oxygen supply shut-off device 301 of the third reference example is disposed between the cladding tube 310 disposed on the outer periphery of the oxygen supply tube 65, and between the oxygen supply tube 65 and the cladding tube 310, and exceeds a predetermined temperature. Then, it has a thermal foaming agent 311 which is deformed so as to block the oxygen supply pipe 65 at the mounting position. Therefore, when the thermal foaming agent 311 is deformed at a predetermined temperature or higher, the oxygen supply pipe 65 is shut off at the mounting position, and the discharge of oxygen from the cannula mounting portion 61 can be automatically stopped.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

For example, in the above-described second reference example , the oxygen supply cutoff device 201 has been described as covering the outer peripheral surface of the oxygen supply pipe 65 over the entire circumference and the cladding pipe 210 made of a heat-shrinkable material. Is not limited. Instead of the cladding tube 210, a tape made of a heat-shrinkable material may be used to cover the outer peripheral surface of the oxygen supply tube 65 over the entire circumference. Furthermore, you may use the coating | coated member which coat | covers only a part of circumferential direction instead of the perimeter of the outer peripheral surface of the oxygen supply pipe 65.

In the third reference example described above, the case where the thermal foaming agent 311 is disposed between the oxygen supply pipe 65 and the cladding pipe 310 that covers the entire outer peripheral surface of the oxygen supply pipe 65 has been described. Is not limited. You may use the coating | coated member which coat | covers only a part of circumferential direction instead of the perimeter of the outer peripheral surface of the oxygen supply pipe 65. In addition, the member disposed between the oxygen supply pipe 65 and the cladding pipe 310 may be any member that increases in volume when the temperature exceeds a predetermined temperature. That is, for example, instead of the thermal explosive 311, a bag in which a gas generating agent such as gunpowder is packed may be used so that gas is generated and the bag expands when the temperature exceeds a predetermined temperature.

Moreover, although the above-mentioned 1st Embodiment and the 1st-3rd reference example demonstrated the case where the oxygen supply pipe | tube 65 of the cannula 60 was interrupted | blocked with the oxygen supply interruption | blocking instrument 1, it is not limited to this. The oxygen supply shield 1 is applicable not only to the oxygen supply pipe 65 of the cannula 60 but also to an oxygen supply pipe in general for supplying oxygen.

  By utilizing the present invention, the supply of oxygen through the oxygen supply pipe can be automatically stopped.

1, 101, 201, 301 Oxygen supply shut-off device 10 Clip (blocking means)
12, 13 Leg (blocking member)
15 Support member (blocking means, deformation member)
60 cannula (oxygenator)
63a outlet 65 oxygen supply pipe 110 clip (blocking means)
112, 113 (blocking member)
210 Cladding tube (blocking means, blocking member)
310 cladding tube (blocking means, blocking member)
311 Thermal foaming agent (blocking means, volume increasing member)

Claims (3)

It can be attached to an oxygen supply pipe for supplying oxygen,
When the ambient temperature at the attachment position in the oxygen supply pipe is equal to or higher than a predetermined temperature, the oxygen supply pipe is provided with a blocking means for cutting off the oxygen supply pipe at the attachment position ,
The blocking means is
A pair of blocking members disposed so as to sandwich the oxygen supply pipe and biased in a direction approaching each other by the elastic force of the spring portion;
An oxygen supply shut-off device , comprising: a deformable member disposed between the pair of shut-off members and formed of a low-melting-point material that melts when the temperature exceeds the predetermined temperature . The pair of blocking members are a pair of leg portions respectively disposed at both ends of the spring portion,
The gap between the pair of leg portions is configured to increase as the distance from the spring portion increases.
The oxygen supply cutoff device according to claim 1, wherein the oxygen supply pipe and the deformable member are disposed in a gap between the pair of legs. The oxygen supply shut-off device according to claim 1 or 2 , wherein the oxygen supply pipe supplies oxygen to the discharge port in an oxygen discharger having a discharge port.

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