JPS63262Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed door device for a therapeutic high-pressure tank that serves as an entrance/exit to an airtight chamber (tank) in which hyperbaric oxygen therapy is performed.

In general, so-called barometric therapy using a high-pressure tank has been known for a long time to treat diving sickness. However, recently, this high-pressure tank has been used to treat circulatory dysfunction (cerebrovascular injury, myocardial infarction, anemia...), toxicosis (carbon monoxide poisoning, cyanide poisoning...), infectious disease (gas eso, tetanus...), etc. It has also begun to be used to treat respiratory system disorders (pulmonary edema, traumatic lung injury, severe pneumonia, etc.). In particular, recently it has been found that the combination of anticancer drugs and tank treatment is effective in cancer treatment, and the use of high-pressure tanks for treatment is increasing.

However, the conventional sliding doors of this type of high-pressure tank are extremely heavy, making it a cumbersome task not only for the patient but also for the attending physician. For example, Utility Model Publication No. 49-23667, which was proposed earlier by the applicant.
In the case of a door such as the sealed door in the publication, its weight is also
It weighs more than 200Kg (tank structure, inner diameter 2800mm, total length 8150mm, maximum working pressure 30Kg/cm ² G specifications), and even though it is a hanging type, manual transfer operation requires considerable force. Moreover, the biggest problem is that simply drawing the door in a straight line does not provide an airtight seal, and when the door is near the front of the doorway frame, the edge of the doorway frame After pressing, the door must be locked. In this case, the operation of moving the heavy door toward the doorway frame is an operation that requires skill and strength.
For this reason, the operator must enter and exit each time through a small door provided on the side wall of the high-pressure tank for emergency escape and work, and then seal the door inside the tank, which is troublesome. Of course, the operator enters the tank each time the door is opened after treatment. In addition, the handle that operates the locking mechanism of this door has the effect of moving the door itself back and forth.
It has to be equipped with a large round handle, which also makes it difficult to operate and has disadvantages such as poor appearance.

In view of the above-mentioned circumstances, the present invention provides a hermetic door device for a therapeutic high-pressure tank that eliminates the above-mentioned defects by adopting a simple sealing method in which the door is immovable and the sealing side is movable as an air-tight means for the door.

That is, the present invention provides a treatment high-pressure tank equipped with a sliding self-propelled door suspended from a rail placed above the entrance, which has an appropriate crushing margin around the entire circumference of the end face of the entrance and exit frame on the door side. A seal body is embedded so as to be freely drawn out, an operating lever for a mechanism for feeding out the seal body is disposed on the side of the doorway frame, and the seal body can be pressed against the door surface facing the front of the doorway frame, and An auxiliary fastener is provided between the side end of the door and the side of the doorway frame.

Hereinafter, the present invention will be explained based on the drawings of embodiments.

The drawing shows a large-sized therapeutic high-pressure tank equipped with a main chamber and an auxiliary chamber. 1 is a high-pressure tank in which a main chamber 1a and an auxiliary chamber 1b are divided longitudinally forward and backward, and this outer wall 1c and an internal partition wall 1d Each doorway frame 3 has a frame end surface 3 which is the inside of each doorway frame 3.
A is equipped with an airtight sliding door 4. The structure of each door 4 is such that rollers 6 attached to hanger parts 5 protruding from both sides of the upper end of the door 4 are arranged between parallel rails 7, 7 installed on the upper part of the entrance/exit frame 3, and suspended. A drive gear 10 that rotates in conjunction with the movement of the piston of a hydraulic cylinder 9 provided on the partition wall 1d surface or the outer wall 1c surface is meshed with an integral rack 8 installed at the upper end of the hanger section 5 for automatic travel. Becomes a type. In this case, the hydraulic cylinder 9 adopts, for example, a double piston structure as shown in the figure, and a drive rack 11 integrated with a piston rod 9b located between both piston parts 9a, 9a is connected to a shaft 10a of the drive gear 10. The pinion 10' arranged therein is brought into mesh, and the rotation of the pinion is replaced by the linear movement of the door. In addition, a guide roller 12 protruding from the lower end of the door 4 is connected to the floor surface 1.
e is guided to the concave receiving groove rail 13 laid below the door, and is configured to prevent the door from swinging and to prevent the door from shifting forward. Reference numeral 14 denotes a sealing body using a seal such as a removable O-ring or T-ring buried all around the frame end surface 3a on the door side of the doorway frame 3. In the illustration, the sealing body 14 has a vertical cross section The entrance/exit frame 3, which has a rectangular shape, has a two-part structure divided into left and right sides (see Fig. 6). One side of the U-shaped seal body 14 is connected to a pressing base plate 15 on the back of the case portion 15a that houses the seal body 14.
However, since the structure is such that it moves toward the front side of the frame by the displacement of the eccentric cam 16 in contact with the back surface, the tip of the seal body 14 that is fed out from the frame end surface 3a comes into pressure contact with one side of the door 4 facing the front. It will be like this. In this case, the amount l of the seal body 14 that is fed out is at most the crushing allowance of the seal itself. Further, as shown in FIGS. 7 and 8, for example, a plurality of eccentric cams 16 (three each in the upper, middle, and lower portions in the figure) are arranged on the pressing base plate 15, and each eccentric cam 16 is connected at one end with a connecting link 17 to form a kind of parallel movement mechanism, of which the shaft 16a of the central eccentric cam 16 is used as a drive shaft, and the entrance/exit frame 3 is attached to the tip of the shaft 16a.
Attach the proximal end of the operating lever 19 protruding from the side portion 3b next to the. 18 is the side portion 3b of the doorway frame 3
and a curved hook body 18a provided on the side end 4b of the door 4.
The auxiliary fastener 18 is mainly used when using negative pressure (reduced pressure). (optional).

To explain this effect now, first of all, high pressure tank 1
When closing the door inside the entrance/exit 2 of the
Door 4) of the entrance/exit 2 located on the partition wall 1d of a, first press the door running switch 25 placed on the entrance/exit frame 3 or the tank surface near it, and press the hydraulic device separately installed outside the high-pressure tank 1. (not shown) and thereby send pressurized oil to one piston chamber of the hydraulic cylinder 9 through the switching valve 20, the integrated drive rack moves along with the movement of the pistons 9a, 9a. 11 is shifted, the shaft 1 is moved from the pinion 10' meshing with the drive rack 11.
0a, the drive gear 10 rotates, and the door 4 integrated with the transfer rack 8 moves linearly by this gear feeding. In this case, the door runs on the rail 7 with rollers 6
Since it has a hanging structure, it moves relatively lightly, and since the guide roller 12 at the lower end slides on the receiving groove rail 13, the door does not shake. still,
If necessary, an upper steady rest roller 26 that slides on the side surface of the rail 7 may be provided. Next, when this door 4 comes to the front position of the entrance/exit frame 3, a limit switch (not shown) is activated to stop driving the hydraulic system and stop the door 4 at a predetermined position. At this time, the seal body 14 is at least flush with the end surface or recessed in the frame end surface 3a of the doorway frame 3, so that the door 4 and the frame end surface 3a can smoothly close the doorway frame 3 without contacting each other. Facing the front (this doorway frame 3
The gap between the frame end surface 3a and the door surface 4a of the door 4 is approximately 1 to 2 mm at most).

After this, when the operating levers 19, for example in an upright position, provided on both sides 3b of the entrance/exit frame 3 are tilted sideways toward the front, the seal body 14 is pulled out via the pay-out mechanism 21 and pressed against the door surface 4a to maintain airtightness. That is, first, the eccentric cam 16 integral with the rotating shaft 16a rotates when the operating lever 19 is tilted sideways, and the other eccentric cams 16, 16 connected via the connecting link 17 also move in conjunction with the eccentric cam 16, and the pressing base plate 15 moves toward the frame end surface 3a in accordance with the amount of lift of the displacement surface 16b of each eccentric cam 16, and the tip 14a of the seal body 14 attached to the pressing base plate 15 protrudes from the embedded groove 22 and presses against the door surface 4a to close the door airtight. The seal body 14 in contact with the door surface 4a becomes slightly crushed.

Of course, the operating lever 19 is operated at both sides of the doorway frame 3, and the two-part seal body 14 is fed out over the entire area of the frame end surface 3a. The operation of the operating lever 19 can be confirmed by, for example, disposing a limit switch (not shown) at the base of the operating lever 19, and relaying to this so that an indicator lamp 23 provided inside the tank lights up. Further, a positioning lamp 24 may be provided to indicate the completion of movement of the door 4.

In this way, the action of the operating lever 19 does not provide a force to press the heavy door 4 itself toward the entrance/exit frame 3, but merely presses the seal member 14 using a gasket.
Since the chisel is delivered, it can be performed with light operation.

Furthermore, regarding the displacement of the door 4 with respect to the entrance/exit frame 3 in the front-rear direction, the running roller 6 is moved toward the indoor side.
has a structure with a flange 6a, and the flange 6a contacts the side surface of the rail 7, and the guide roller 12 at the lower end also becomes immovable due to the position restriction of contact with one side of the receiving groove rail 13. To the doorway frame side, this frame end surface 3a and door surface 4
A and the width of the seal feeding amount l (about 1 to 2 mm)
(This displacement of the door 4 does not cause any trouble as long as the drive gear 10 slides sideways with respect to the rack 8). That is, 0.8 used in ordinary barotherapy.
The heavy door 4 does not move when pressurized to about 1.5 atm, but if the pressure is increased to 4 to 7 atm for treatment of diving disease or special treatment, the door 4 itself will close to the seal body 14 depending on the internal pressure. It is pushed toward the doorway frame 3 against the full crushing margin, and finally comes into direct contact with the frame end surface 3a and stops. The higher the pressure is, the more the internal pressure will cause the door 4 to close.
is pressed to create a so-called self-seal. In this case, if necessary, the case portion 15 of the seal body 14
A spring (not shown) may be interposed between a and the pressing base plate 15 to cause the entire sealing body 14 to retreat when the door 4 is pressed by applying pressure above a certain level. Further, even under pressurized conditions, the hook body 18a of the doorway frame 3 may be rotated and hooked onto the receiving pin 18b on the door 4 side. At this time, even if the door 4 moves to the doorway frame 3 side, the hook body 18a
Since the hook body 18b is of a type that is dropped from above onto the receiving pin 18b, the contact position of this curved portion is shifted due to the weight of the hook body 18a, and the hook body 18a is engaged more deeply as it descends.

In addition, in the case of using reduced pressure for pre-surgery treatment, etc., the door 4 is pulled toward the room by the negative pressure, contrary to the above, so after the door 4 faces the front of the entrance/exit frame 3. If the hook body 18a is rotated and latched onto the receiving pin 18b on the door 4 side, the hook body 18a, in conjunction with the collar 6a of the roller 6 and the rail regulation of the guide roller 12, will reliably hold the door 4 in place. This prevents it from shifting toward the indoor side.

Next, when opening the door 4, return the operating lever 19 in the opposite manner to the above, and in conjunction with this, the seal body 14
If the door 4 is moved backward and then reverse hydraulic pressure is applied to the hydraulic cylinder 9, the door 4 will return.

In addition, although the seal body 14 embedded in the frame end surface 3a has a two-part structure with respect to the entrance/exit frame 3 in the illustration, if an appropriate link mechanism is interposed in the operating lever and a cam feeding device is provided for the entire circumference, It is also possible for the sealing body to be a frame-shaped integral piece.

As mentioned above, the hermetically sealed door device for a therapeutic high-pressure tank of the present invention includes a sliding door at the end of the entrance/exit frame in the high-pressure tank, and a seal with a crushing margin at the end of the entrance/exit frame. By burying the lumber so that it can be freely drawn out and placing the operating lever on the side of the doorway frame, the airtightness of the door can be achieved without pressing the heavy door itself against the doorway frame as in the past. It is only necessary to move the sealing body side via a feeding mechanism linked to the sealing mechanism, making the sealing work simple. Of course, this linear pulling movement of the door is also automatically operated by the rotation of the drive gear that is linked to the movement of the piston of the hydraulic cylinder, so the door sealing work is not done by a specialist (such as a doctor) but by an internal person. It can be used even if the patient or an attendant is present. Safety can be maintained by checking this situation on a monitor outside the tank, such as through a window installed in the high-pressure tank wall or from a television camera placed as necessary. or,
The door of this invention does not have a large handle or operating lever for high compression in the center like the conventional ones, so it not only looks good but also has practical effects such as not getting in the way when carrying in stretchers etc. play.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a vertical sectional side view of the main parts of the high-pressure tank, Fig. 2 is a front view of the door, Fig. 3 is a front view of the same in the closed state, and Fig. 4 is a front view of the high-pressure tank. Figure 5 is a side view of the door, Figure 6 is a side view of the seal body, Figure 7 is a side view, Figure 8 is a side view of the feeding mechanism, Figure 9 is a side view of the seal body. 10A and 10B are explanatory diagrams showing the relationship between the door part and the seal body. 1... High pressure tank, 1a... Main chamber, 1b... Sub-chamber, 2... Entrance/exit, 3... Entrance/exit frame, 3a...
Frame end surface, 4...Door, 6...Roller, 7...Rail, 8...Rack, 9...Hydraulic cylinder, 10
... Drive gear, 12 ... Guide roller, 13 ...
Concave receiving groove rail, 14... Seal body, 15... Press board, 18... Auxiliary stopper, 19... Operation lever.

Claims (1)

[Scope of utility model registration request] In a therapeutic high-pressure tank equipped with a sliding self-propelled door that is suspended inside the entrance, a seal body with a crushing margin is embedded in the entire circumference of the end face of the entrance frame on the door side, and is freely drawn out. The operating lever of the mechanism for feeding out the seal body is disposed on the side of the doorway frame, and the seal body can be pressed against the door surface facing the front of the doorway frame, and the side edge of the door and the side of the doorway frame Sealing door device in therapeutic high-pressure tanks with auxiliary fasteners in between.