JP2017066587A - High pressure/low pressure room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high pressure/low pressure room that can seal an entrance of a chamber by an opening/closing door with a simple structure and reduce a burden of maintenance of an opening/closing structure.SOLUTION: A high pressure/low pressure room includes a chamber forming a living space and having an entrance, and an opening/closing door which has a size and a shape capable of blocking the entrance of the chamber and opens/closes the entrance, and further includes compression means which is arranged outside the chamber and raises the atmospheric pressure inside the chamber or decompression means which is arranged inside the chamber and lowers the atmospheric pressure inside the chamber. Because the opening/closing door is sucked or pressed toward the side where the atmospheric pressure is lower due to a difference between the atmospheric pressure inside and outside the chamber, the opening/closing door closely adheres to the entrance of the chamber so as to block the entrance, and thereby the entrance of the chamber is closed by the opening/closing door.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high-pressure and low-pressure room having a living space in which the atmospheric pressure in the room can be maintained at a pressure higher or lower than normal pressure.

Conventionally, high-pressure oxygen therapy and high-altitude training have been performed by setting the atmospheric pressure in the room to be higher and lower than normal pressure. Various chambers that are high-pressure and low-pressure rooms for this purpose have been proposed. For example, the decompression chamber for promoting health in Patent Document 1 is a decompression chamber for promoting health provided with a decompression generating facility for decompressing the interior of the chamber, and enters and exits the chamber without changing the indoor pressure. It is equipped with a pressure adjustment room. That is, it is a structure having a device called a so-called air lock that allows a human to pass inside and outside the decompression chamber while minimizing a decrease in air pressure and loss of air in the decompression chamber.

  Further, the pressure door opening and closing device of Patent Document 2 is a hydraulic door rotary actuator that opens and closes a pressure chamber, and a hydraulic rotary actuator that rotates together with the pressure door, and an operation that is supplied to and discharged from the rotary actuator. A closed circuit that guides oil (hydraulic fluid), a throttle that provides resistance to the hydraulic oil flowing through the closed circuit, a bypass passage that guides hydraulic oil that bypasses the throttle and is supplied to and discharged from the rotary actuator, and the bypass passage And a stop valve for opening and closing the pressure door, and the rotary actuator adjusts the opening and closing speed of the pressure door by the torque applied to the pressure door.

Japanese Patent Laid-Open No. 2003-210637 JP 2004-353231 A

  However, in the conventional decompression chamber and pressurization door opening and closing device, the door is opened and closed by adopting a double structure or introducing a complicated hydraulic system, which requires advanced maintenance, There is a problem that the cost becomes high.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a high-pressure and low-pressure room that can seal the entrance of a chamber with an opening / closing door with a simple structure and can reduce the maintenance burden of the opening / closing structure. .

  The high-pressure and low-pressure room according to claim 1 includes a chamber having an entrance / exit that forms a living space, an opening / closing door that opens and closes the entrance / exit in a size and shape that can close the entrance / exit of the chamber, and is disposed outside the chamber. A pressurizing means for increasing the atmospheric pressure in the chamber or a depressurizing means arranged in the chamber for lowering the atmospheric pressure inside the chamber, and on the low pressure side due to the difference between the atmospheric pressure inside the chamber and the atmospheric pressure outside the chamber. By opening or closing the opening / closing door, the opening / closing door is brought into close contact with the entrance / exit so as to close the entrance / exit of the chamber, and the entrance / exit of the chamber is closed by the opening / closing door.

  The high-pressure and low-pressure room according to claim 2 has a packing member having elastic force at a portion where the peripheral portion of the chamber entrance / exit and the peripheral portion of the open / close door overlap each other at the peripheral portion of the chamber entrance / exit or the open / close door. In addition, the opening / closing door seals the chamber when the surrounding portion of the entrance / exit of the chamber or the surrounding portion of the opening / closing door is in close contact with the packing member.

  The high-pressure and low-pressure room according to claim 3 includes a lock mechanism that holds the open / close door in a state in which the entrance / exit of the chamber is closed, and the gap between the entrance / exit of the chamber and the open / close door changes as the packing member expands / contracts, The lock mechanism holds or opens the open / close door according to the change.

  The high-pressure and low-pressure room according to claim 4 has a structure in which the lock mechanism has a structure in which the open / close door is sandwiched between the chambers, and the packing member contracts when the inside of the chamber becomes high-pressure or low-pressure, so that the gap between the entrance / exit of the chamber and the open / close door And the lock mechanism opens the door.

  The high-pressure and low-pressure room according to claim 5 is characterized in that a handle is provided on the outer surface of the chamber of the open / close door.

  According to the present invention, the opening / closing door is sucked or pressed toward the lower pressure side due to the difference between the pressure inside the chamber and the pressure outside the chamber, so that the opening / closing door closes the entrance / exit of the chamber. By being in close contact with the entrance / exit and closing the entrance / exit of the chamber with the opening / closing door, the entrance / exit of the chamber can be sealed with the opening / closing door with a simple structure, and the maintenance burden of the opening / closing structure can be reduced.

It is explanatory drawing which shows an example of a structure of the high voltage | pressure low pressure room which concerns on this invention. It is the front view and vertical fragmentary sectional view which show 1st Example of the high voltage | pressure low pressure room which concerns on this invention. It is a horizontal fragmentary sectional view of the same high voltage low pressure room. It is a front view which shows the 2nd Example of the high voltage | pressure low pressure room which concerns on this invention. It is explanatory drawing of the locking mechanism of the same high voltage | pressure low pressure room. It is explanatory drawing which concerns on the AA arrow line cross section of FIG. 4 which shows operation | movement of the locking mechanism of the same high voltage | pressure low pressure room. It is the front view and vertical fragmentary sectional view which show 3rd Example of the high voltage | pressure low pressure room which concerns on this invention. It is a horizontal fragmentary sectional view of the same high voltage low pressure room. It is a front view which shows the 4th Example of the high voltage | pressure low pressure room which concerns on this invention. It is explanatory drawing of the locking mechanism of the same high voltage | pressure low pressure room. It is explanatory drawing which concerns on the BB arrow line cross section of FIG. 9 which shows operation | movement of the locking mechanism of the same high voltage | pressure low pressure room. It is the front view and vertical fragmentary sectional view which show a mode that the handle was provided in the 1st and 3rd Example of the high voltage | pressure low pressure room which concerns on this invention.

  The high-pressure and low-pressure room according to the present invention is a living space and can maintain the atmospheric pressure in the chamber, which is a room, at a pressure higher or lower than normal pressure. FIG. 1 is an explanatory diagram showing an example of the configuration of a high-pressure and low-pressure room according to the present invention. In the description of FIG. 1, for convenience of explanation, one high-pressure and low-pressure room 1 is provided with a chamber 10 that forms a living space, a pressurizing compressor 6 that is a pressurizing means for increasing the air pressure in the chamber, and the air pressure in the chamber. However, the high-pressure low-pressure room 1 and the high-pressure low-pressure room 2 are actually used as low-pressure rooms. The decompression compressor 7 is provided, the pressurization compressor 6 is not provided, and the high pressure / low pressure room 3 and the high pressure / low pressure room 4 have the pressurization compressor 6 as the high pressure room, and do not have the decompression compressor 7.

  Also, the chambers 10, 20, 40, and 50 are sized so that a human body can be completely accommodated, and from a size that can simply be laid down, a size that can be a room-like size or a seated size, There are various sizes up to the size that multiple people can enter. The chambers 10, 20, 40, and 50 have entrances 10a, 20a, 40a, and 50a. When the open / close doors 12, 22, 42, and 52 are closed, the inside of the chamber is a sealed space. is there.

  The pressurizing compressor 6 is a pressurizing means for increasing the air pressure in the chamber, and is disposed outside the chambers 40 and 50 and communicates with the inside of the chamber. The pressurizing compressor 6 is an example of a pressurizing unit, and may be another unit such as a pump.

  The decompression compressor 7 is decompression means for lowering the atmospheric pressure in the chamber, and is disposed in the chambers 10 and 20 to push out air in the chamber. The decompression compressor 7 is an example of decompression means, and may be other means such as a pump.

  Hereinafter, Example 1 will be specifically described with reference to the drawings. FIG. 2 is a front view and a vertical partial cross-sectional view showing a first embodiment of the high-pressure and low-pressure room according to the present invention. FIG. 3 is a horizontal partial cross-sectional view of the high-pressure and low-pressure room.

  The high-pressure and low-pressure room 1 of this embodiment is a low-pressure room provided with a decompression compressor 7 inside the chamber 10, and the inside of the chamber 10 is decompressed by operating the decompression compressor 7. On the outside of the entrance / exit 10a of the high-pressure / low-pressure room 1, an opening / closing door 12 that opens and closes the entrance / exit 10a is provided in a size and shape capable of closing the entrance / exit 10a of the chamber 10. As shown in FIGS. 2 and 3, the opening / closing door 12 closes the entrance / exit 10 a from the outside of the chamber 10. The opening / closing door 12 is provided so as to be freely opened and closed by a hinge 14. In addition, a packing member 16 having elasticity is provided at a portion where the peripheral portion of the entrance / exit 10a and the peripheral portion of the open / close door 12 overlap each other around the entrance / exit 10a of the chamber 10 (the packing member 16 includes the open / close door). 12 may be provided around the periphery).

  In the high-pressure and low-pressure room 1 having such a structure, as shown in FIG. 3A, the inside of the chamber 10 is not decompressed yet and the open / close door 12 is opened, and the decompression compressor 7 When the internal pressure is reduced, as shown in FIG. 3B, the opening / closing door 12 is sucked toward the lower pressure side due to the difference between the pressure inside the chamber 10 and the pressure outside the chamber 10. Thus, the opening / closing door 12 is brought into close contact with the entrance / exit 10a so as to block the entrance / exit 10a, and the entrance / exit 10a is closed by the opening / closing door 12. And when the surrounding part of the opening-and-closing door 12 closely_contact | adheres to the packing member 16, the opening-and-closing door 12 will seal the chamber 10, and the airtightness inside the chamber 10 will be maintained.

  Hereinafter, Example 2 will be specifically described with reference to the drawings. FIG. 4 is a front view showing a second embodiment of the high-pressure and low-pressure room according to the present invention. FIG. 5 is an explanatory diagram of the locking mechanism of the high-pressure and low-pressure room. FIG. 6 is an explanatory view according to a cross section taken along the line AA in FIG. 4 showing the operation of the locking mechanism of the high-pressure and low-pressure room.

  The high-pressure and low-pressure room 2 of the present embodiment is a low-pressure room including the decompression compressor 7 inside the chamber 20 as in the high-pressure and low-pressure room 1 of the first embodiment. The inside is depressurized. Similarly, an opening / closing door 22 that opens and closes the entrance / exit 20a that can close the entrance / exit 20a is provided outside the entrance / exit 20a of the high-pressure / low-pressure room 2, and the opening / closing door 22 closes the entrance / exit 20a from the outside of the chamber 20. . The open / close door 22 is provided by a hinge 24 so as to be freely opened and closed. In addition, a packing member 26 having elasticity is provided at a portion where the peripheral portion of the entrance / exit 20a and the peripheral portion of the open / close door 22 overlap each other (the packing member 26 is provided around the open / close door 22). Part may be provided).

  The high-pressure and low-pressure room 2 includes a lock mechanism 30 that holds the open / close door 22 in a state where the doorway 20 a of the chamber 20 is closed. The lock mechanism 30 has a substantially square arm shape, and includes a short side handle 30b, a long side lock rod 30c, and a rotary shaft 30a at the center thereof. The lock mechanism 30 is shown in FIG. In addition, it swings around the rotary shaft 30 a and is provided near the entrance / exit 20 a of the chamber 20. As shown in FIGS. 4 and 5, a thick plate-like lock block 32 is provided at a portion where the open / close door 22 is locked in a state where the lock rod 30 c of the lock mechanism 30 is horizontal. The lock block 32 has a flat portion 32a that is a flat portion with which the lock rod 30c abuts in a state where the lock rod 30c is horizontal, and an inclined portion 32b that is inclined so that the thickness decreases toward the lower side of the flat portion 32a. (See FIG. 6).

  The operation method and operation of the lock mechanism 30 will be described. First, when the decompression of the interior of the chamber 20 is started with the open / close door 22 being almost closed, the open / close door 22 starts to come into close contact with the packing member 26, and FIG. As shown in (a), by rotating the handle 30 b of the lock mechanism 30, the lock rod 30 c is put on the inclined portion 32 b of the lock block 32. Next, when the handle 30b is further rotated, the inclined portion 32b is pressed by the lock rod 30c, and the opening / closing door 22 moves toward the chamber 20 by the amount indicated by the width a in FIG. When the handle 30b is further rotated, the lock rod 30c becomes horizontal and rides on the flat portion 32a of the lock block 32 (FIG. 6B). In this state, even if the handle 30 b of the lock mechanism 30 is released, the opening / closing door 22 is urged away from the chamber 20 by the repulsive force of the packing member 26, so that it does not rotate.

  However, when the internal pressure of the chamber 20 is reduced, the opening / closing door 22 is further pulled inward of the chamber 20 to compress the packing member 26, and the opening / closing door 22 further approaches the chamber 20 (see FIG. 6B). Width b). Then, as shown in FIG. 6C, the lock rod 30c of the lock mechanism 30 moves away from the lock block 32, the lock mechanism 30 rotates, and the lock of the lock mechanism 30 with respect to the open / close door 22 is released. Become. However, as long as the decompressed state inside the chamber 20 is maintained, the open / close door 22 is kept in close contact with the entrance / exit 20a and the chamber 20 is sealed. When the decompression is completed, the pressure inside the chamber 20a increases, and the suction force of the open / close door 22 decreases, the open / close door 22 can be freely opened and closed manually. In addition, in order to reduce the friction between the lock rod 30c and the lock block 32 and to facilitate the operation, the lock rod 30c may be rotatable around the rod axis.

  Hereinafter, Example 3 will be specifically described with reference to the drawings. FIG. 7 is a front view and a vertical partial cross-sectional view showing a third embodiment of the high-pressure and low-pressure room according to the present invention. FIG. 8 is a horizontal partial cross-sectional view of the high-pressure and low-pressure room.

  The high-pressure low-pressure room 3 of the present embodiment is a high-pressure room provided with a pressurizing compressor 6 outside the chamber 40, and the inside of the chamber 40 is pressurized and depressurized by the operation of the pressurizing compressor 6. Inside the entrance / exit 40a of the high-pressure / low-pressure room 40, an opening / closing door 42 that opens and closes the entrance / exit 40a is provided in a size and shape that can close the entrance / exit 40a of the chamber 40. As shown in FIGS. 7 and 8, the open / close door 42 closes the entrance 40 a from the inside of the chamber 40. The opening / closing door 42 is provided by a hinge 44 so as to be freely opened and closed. In addition, a packing member 46 having elasticity is provided at a portion around the entrance / exit 40a of the chamber 40 where the surrounding portion of the entrance / exit 40a and the surrounding portion of the open / close door 42 overlap each other (the packing member 46 includes the open / close door). 42 may be provided in the peripheral portion of 42).

  In the high-pressure and low-pressure room 3 having such a structure, as shown in FIG. 8A, the inside of the chamber 40 is not pressurized yet and the open / close door 42 is opened, and the pressurizing compressor 6 is used to When the internal pressure is applied, as shown in FIG. 8B, the opening / closing door 42 is pressed toward the low pressure side due to the difference between the atmospheric pressure inside the chamber 40 and the atmospheric pressure outside the chamber 40. Thus, the opening / closing door 42 is brought into close contact with the entrance / exit 40a so as to block the entrance / exit 40a, and the entrance / exit 40a is closed by the opening / closing door 42. When the peripheral portion of the opening / closing door 42 is in close contact with the packing member 46, the opening / closing door 42 seals the chamber 40, and the airtightness inside the chamber 40 is maintained.

  Hereinafter, Example 4 will be specifically described with reference to the drawings. FIG. 9 is a front view showing a fourth embodiment of the high-pressure and low-pressure room according to the present invention. FIG. 10 is an explanatory diagram of the locking mechanism of the high pressure / low pressure room. FIG. 11 is an explanatory view according to the cross section taken along the line B-B in FIG. 9 showing the operation of the locking mechanism of the high-pressure and low-pressure room.

  The high-pressure and low-pressure room 4 of the present embodiment is a high-pressure room including the pressurizing compressor 6 inside the chamber 50, as in the high-pressure and low-pressure room 3 of the third embodiment. The inside is pressurized. Similarly, an opening / closing door 52 that opens / closes the entrance / exit 50a that can close the entrance / exit 50a is provided inside the entrance / exit 50a of the high-pressure / low-pressure room 4, and the opening / closing door 52 closes the entrance / exit 50a from the inside of the chamber 50. . The open / close door 52 is provided with a hinge 54 so as to be freely opened and closed. In addition, a packing member 56 having elasticity is provided at a portion where the peripheral portion of the entrance / exit 50a overlaps the peripheral portion of the entrance / exit 50a and the peripheral portion of the open / close door 52 (the packing member 56 is provided around the open / close door 52). Part may be provided).

  As in the second embodiment, the high-pressure and low-pressure room 4 includes a lock mechanism 30 that holds the opening / closing door 52 in a state where the doorway 50a of the chamber 50 is closed. 10 and 11, a lock plate 62 extending from the opening / closing door 52 is provided at a portion where the opening / closing door 52 is locked in a state where the lock rod 30c of the locking mechanism 30 is horizontal. . The lock plate 62 is a plate material that rises horizontally from the open / close door 52 and is narrow in the vertical direction, with its surface facing left and right. The opening / closing door 52 side (arm portion 62a) of the lock plate 62 is narrower and has a substantially square plate surface (main body portion 62b) at the opposite end. The size is such that the lock opening 50b formed near the entrance 50a of the chamber 50 can be penetrated. The main body portion 62b of the lock plate 62 has a substantially inverted U-shaped groove, and the groove has a circular portion 62c in which the lock rod 30c is loosely fitted in a state where the lock rod 30c is horizontal and a circular shape. A groove 62d extends downward from the chamber 50 toward the lower side of the part 62c, and a flat part 62e that goes straight down following the inclined part 62d (see FIG. 11).

  The operation method and operation of the lock mechanism 30 will be described. First, the open / close door 52 is substantially closed (the main body portion 62b of the lock plate 62 passes through the lock opening 50b and comes out of the chamber 50). When the pressurization of the interior of the chamber 50 is started, the opening / closing door 52 starts to come into close contact with the packing member 56, and as shown in FIG. 11A, the handle 30b of the lock mechanism 30 is rotated, thereby 30c is in a state of being hung from the flat portion 62e of the main body portion 62b of the lock plate 62 to the inclined portion 62d. Next, when the handle 30b is further rotated, the inclined portion 62d is pressed by the lock rod 30c, and the opening / closing door 52 moves toward the chamber 50 by the amount indicated by the width a in FIG. When the handle 30b is further turned, the lock rod 30c becomes horizontal and fits into the circular portion 62c of the lock plate 62 main body portion 62b (FIG. 11B). In this state, even if the hand is released from the handle 30 b of the lock mechanism 30, the repelling force of the packing member 56 causes the open / close door 52 to be biased in the direction toward the inside of the chamber 50, so that it does not rotate.

  However, when pressurization inside the chamber 50 proceeds, the opening / closing door 52 is further pressed toward the outside of the chamber 20 to compress the packing member 26, and the opening / closing door 52 further approaches the chamber 50 (FIG. 11B). ) For width b). Then, as shown in FIG. 11 (c), the lock rod 30 c of the lock mechanism 30 becomes free within the circular portion 62 c of the main body portion 62 b of the lock plate 62, and the lock mechanism 30 rotates to move from the lock plate 62. As a result, the lock mechanism 30 is unlocked with respect to the open / close door 52. However, as long as the pressurized state inside the chamber 50 is maintained, the open / close door 52 is in close contact with the inlet / outlet port 50a and maintains the sealed state of the chamber 50. When the pressurization is completed, the pressure inside the chamber 50a decreases, and the pressing force of the open / close door 52 decreases, the open / close door 52 can be freely opened and closed manually. In addition, in order to reduce the friction between the lock rod 30c and the lock plate 62 to facilitate operation, the lock rod 30c may be rotatable about the rod axis.

  According to the high-pressure and low-pressure rooms 1 to 4 of this embodiment as described above, the low pressure side is caused by the difference between the pressure inside the chamber 10, 20, 40, 50 and the pressure outside the chamber 10, 20, 40, 50. When the opening / closing doors 12, 22, 42, 52 are sucked or pressed toward the door, the opening / closing doors 12, 22, 42, 52 pass through the entrances 10a, 20a, 40a, 50a of the chambers 10, 20, 40, 50. The doors 10a, 20a, 40a, and 50a are in close contact with the doors 10a, 20a, 40a, and 50a so as to be closed, and the doors 10a, 20a, 40a, and 50a of the chambers 10, 20, 40, and 50 are closed by the open / close doors 12, 22, 42, and 52. With the simple structure, the doors 10a, 20a, 40a, 50a of the chamber can be sealed by the opening / closing doors 12, 22, 42, 52, and the maintenance burden of the opening / closing structure can be reduced.

  Further, the entrances 10a, 20a of the chambers 10, 20, 40, 50 are the peripheral parts of the entrances 10a, 20a, 40a, 50a of the chambers 10, 20, 40, 50 or the peripheral parts of the open / close doors 12, 22, 42, 52. , 40a, 50a and the surrounding portions of the open / close doors 12, 22, 42, 52 are provided with packing members 16, 26, 46, 56 having elasticity, and packing members 16, 26, 46 are provided. 56, the peripheral portions of the entrances 10a, 20a, 40a, 50a of the chambers 10, 20, 40, 50 or the peripheral portions of the open / close doors 12, 22, 42, 52 are brought into close contact with each other. , 52 can be sealed with the chambers 10, 20, 40, 50 being more airtight.

  A lock mechanism 30 is provided for holding the open / close doors 22 and 52 in a state in which the entrances and exits 20a and 50a of the chambers 20 and 50 are closed, and the packing members 26 and 56 expand and contract so that the entrances and exits 20a and 50a of the chambers 20 and 50 If the distance between the open / close doors 22 and 52 is changed and the lock mechanism 30 can hold or open the open / close doors 22 and 52 in accordance with the change, it is not necessary to incorporate various structures into the hinge and the like. And the maintenance burden of the opening / closing structure can be reduced.

  Further, the lock mechanism 30 has a structure in which the open / close doors 22 and 52 are sandwiched between the chambers 20 and 50. When the inside of the chambers 20 and 50 becomes high pressure or low pressure, the packing members 26 and 56 contract and the chambers 20 and 50 are contracted. When the interval between the 50 doorways 20a and 50a and the open / close doors 12 and 52 is narrowed so that the lock mechanism 30 can open the open / close doors 22 and 52, the lock mechanism 20 is opened and closed during normal use. Since 22 and 52 are open, the risk that the lock mechanism 30 is not released when an emergency occurs can be avoided.

  Since the open / close doors 12, 22, 42, 52 of the high-pressure / low-pressure rooms 1, 2, 3, 4 themselves do not have a part to be operated by a person, the open / close doors 12, 22, 42, 52 are opened / closed. Since it is difficult, for example, as shown in FIG. 12, a handle 70 can be provided on the outer surface of the chambers 10, 42 of the open / close doors 12, 42.

  As described above, according to the present invention, it is possible to provide a high-pressure and low-pressure room that can seal the entrance / exit of the chamber with an opening / closing door with a simple structure and can reduce the maintenance burden of the opening / closing structure.

DESCRIPTION OF SYMBOLS 1 ... High pressure low pressure room 2 ... High pressure low pressure room 3 ... High pressure low pressure room 4 ... High pressure low pressure room 6 ... Compression compressor 7 ... Compressor 8 for decompression ... Control device 10 ... Chamber 10a ... Entrance / exit 12 ... Open / close door 14 ... Hinge 16 ... Packing member 20 ... Chamber 20a ·································································································· Packing member 30 ..... Lock block 32a ... Flat part 32b ... Inclined part 40 ... Chamber 40a ... Entrance / exit 42 ... Open / close door 44 ... Hinge 46 ... Packing member 50 .... Chamber 50a ... Entrance / exit 50b .... Locking opening 52 ... Opening / closing door 54 ... Hinge 56 ... Packing member 62 ... Lock plate 62a ... Arm part 62b ... Main part 62c ... Circular part 62d: inclined part 62e ... flat part 70 ... handle

Claims (5)

In a high-pressure and low-pressure room having a living space in which the atmospheric pressure in the room can be maintained at a pressure higher or lower than normal pressure,
A chamber having an entrance that forms the living space;
An opening and closing door that opens and closes the entrance and exit in a size and shape capable of closing the entrance and exit of the chamber;
A pressurizing means arranged outside the chamber for increasing the atmospheric pressure in the chamber or a decompression means arranged inside the chamber for lowering the atmospheric pressure inside the chamber;
Due to the difference between the atmospheric pressure inside the chamber and the atmospheric pressure outside the chamber, the opening / closing door is sucked or pressed toward the low pressure side, so that the opening / closing door closes the entrance / exit of the chamber. A high-pressure and low-pressure room, which is in close contact with an entrance and exit, and the entrance and exit of the chamber is closed by the open / close door. A packing member having an elastic force at a portion of the peripheral portion of the entrance / exit of the chamber or a peripheral portion of the open / close door that overlaps the peripheral portion of the entrance / exit of the chamber and the peripheral portion of the open / close door;
2. The high-pressure and low-pressure room according to claim 1, wherein the opening / closing door seals the chamber when the surrounding portion of the entrance / exit of the chamber or the surrounding portion of the opening / closing door is in close contact with the packing member. A lock mechanism for holding the open / close door in a state of closing the entrance of the chamber;
The space between the doorway of the chamber and the open / close door changes as the packing member expands / contracts, and the lock mechanism holds or opens the open / close door according to the change. High pressure and low pressure room. The lock mechanism has a structure in which the opening / closing door is sandwiched between the chambers,
The packing member is contracted when the pressure in the chamber becomes high or low, and the interval between the doorway of the chamber and the open / close door is narrowed, and the lock mechanism opens the open / close door. Item 4. The high-pressure and low-pressure room according to item 3.   The high pressure / low pressure room according to any one of claims 1 to 4, wherein a handle is provided on an outer surface of the chamber of the open / close door.

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