JP2630982B2 - Airtight structure of panel shutter at air dome opening - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airtight structure of a panel shutter to be installed in an airlock opening of a so-called air dome building in which the indoor side is maintained at a high pressure.

[Problems to be Solved by Conventional Techniques and Inventions] In a conventional building, when air conditioning equipment is provided, an airtight structure is adopted in an environmental part between an outdoor and an indoor,
Many airtight fittings are also known. In nuclear facilities and facilities that handle radioactive materials that require special environmental control, it is necessary to maintain the negative pressure on the contaminated air side. An airtight structure is adopted. On the other hand, in the precision machine industry and medicine, a clean air chamber is formed, and in this example, the high dust removing side is kept in a pressurized state. An air lock required for adjusting the differential pressure is provided in an opening for a passage provided at a boundary portion having a pressure difference, and traffic is controlled.

Recently, a large-span building supported by the surrounding structures with the air membrane structure reinforced with cables and applying air pressure from the inside to keep the indoor side at high pressure is called the “air dome” and has been spotlighted. ing.

By the way, an air dome is built on the assumption that it will be used for multipurpose and multipurpose such as a covered baseball stadium, an event stadium, or a used car exhibition hall. The size of the equipment is exceptionally large, so it is necessary not only to increase the openings required for operation, but also to keep the interior side at high pressure at all times. In order to adjust the differential pressure, the outside and indoor sides have a middle yard and a double internal / external structure.
It is necessary to provide a so-called air lock opening.

However, with conventional internal and external air lock openings, it is not assumed that opening and closing of the built-in opening and closing body will be performed simultaneously to control traffic, and the built-in opening and closing body will not be affected by the pressure. However, since the doors were limited to opening doors such as doors, the openings were also relatively small, which was necessary for human traffic.

However, as described above, in an air dome gate that is supposed to be used for multipurpose and multipurpose, when materials such as cranes that are longer than the gate pass through, large quantities such as vehicles used for used car exhibition halls It is necessary to take measures when continuous loading and unloading of exhibits are required, or when it is used as an emergency passage in case of fire, etc., or as a doorway for emergency vehicles, etc. With conventional traffic management that repeats opening and closing operations, time loss etc. will result in significant hindrance to operation,
Traffic management that requires simultaneous opening and closing is required.

The actual situation is that an opening / closing body capable of coping with such various conditions has not yet been developed. Therefore, as a result of repeated experiments and examinations in selecting the opening / closing body, a plurality of panels are independent, and each of the adjacent panels in the closed position is placed on the lower panel and takes a serial position. Focusing on the merit that the shutter allows air-tightness between adjacent panels to be performed by the weight of the upper panel, this shutter is intended to be adopted. Under various bad conditions such as the convenience of using the conventional panel shutter, the conventional panel shutter cannot be used as it is. In other words, even under the above-mentioned conditions, various performances such as open / close operability, pressure resistance, airtightness, durability or maintenance / maintenance such as maintenance / inspection, workability, safety, etc. are equivalent to or higher than those of a normal panel shutter. Must be provided.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and aims to provide an airtight structure of a panel shutter at an air dome opening which can eliminate these problems. In the panel shutter which is hung by the connecting chain and is capable of being transformed into a series of elevating and lowering postures on the guide rail and a parallel storing posture in the storage case, the storage case has a high pressure on the indoor side. The air conditioner according to the present invention is characterized in that the inside of the storage case is installed toward the high pressure side so that the inside pressure of the storage case becomes equal to the indoor air pressure with respect to the airlock opening of the maintained building.

In addition, according to the present invention, even when the double air lock openings are simultaneously opened, the panels in the storage state in the parallel state can prevent the shutter curtain surface from receiving a large pressure receiving load from the inside. By using the pressing force pressed by the above, it is possible to maintain reliable airtightness by a simple airtight structure that only considers the four peripheral edges on the low pressure side of the opening without any complicated airtight structure. Not only is it possible, but also during long-term operation of the air dome, maintenance and management can be effectively performed without affecting the internal pressure loss.

EXAMPLES The present invention will be described in detail with reference to drawings of specific examples of an air dome designed for viewing and exhibiting baseball and other sports. FIG. 1 is an overall plan view of the air dome, FIG.
The figure is a cross-sectional view along the center line, FIG. 3 is a cross-sectional view of an entrance / exit gate section where an airlock is installed, and FIG. 4 is a cross-sectional view of a part where an airlock is installed. In the figure, 1 is an air dome, 2 is an arena (ground, open space), 3 is an audience seat,
Reference numeral 4 denotes an air lock constituted by a double shutter, which is an entrance gate which also serves as a cargo handling room. 5 is the inside, 6 is the outside, and the inside 5 side and the outside 6 side of the airlock 4 are provided with respect to the opening 8 provided in the building frame.
Internal and external panel shutters 1 supported by structure 7
0 and 10 are installed, respectively, to shut off the inside and outside of the air lock 4, and the inside becomes the inside 5 or the outside 6 depending on the single open / close state of each panel shutter 10.
Each panel shutter 10 is provided with a storage case 20 and a guide rail 30 supported by structures 7, such as beams, falling walls, and sleeve walls, respectively.

FIG. 5 is an overall perspective view from the outer surface of the panel shutter 10, FIG. 6 is a detailed plan view of the shutter side end including the guide rail 30, and FIG. 7 is a vertical sectional view of the upper part of the opening 8. In these drawings, a panel shutter 10 is configured by vertically connecting a plurality of panels 11, 11,... At predetermined intervals by a chain 12, to constitute a shutter curtain 13. In addition, it can be freely opened and closed in an open state in which the panels 11A are arranged in order from the uppermost row and are suspended and stored, and in a closed state and a closed state which are sequentially vertically extended along the guide rail 30.

The panel shutter 10 will be described in more detail. The upper and lower edges of each panel 11 of the shutter curtain 13, as shown in detail in FIGS.
Air tightness means composed of 11a and a metal sealing edge 11b is provided, and when the tension of the chain 12 is loosened when the shutter curtain 13 is closed, the sealing edge 11b bites into the sealing material 11a due to its own weight of each panel 11. By deforming this, the space between the upper and lower panels 11 is closed to form an airtight structure. In addition, since this airtight means is affected by the pressure difference between the inside and outside, setting blocks 11c and 11d are arranged at appropriate lengths in the longitudinal direction on the upper and lower edges of the upper and lower panels 11 forming a phase difference. , Are set to dimensions for adjusting the bite of the seal edge 11b. In FIG. 5, reference numeral 11e denotes a sealing material provided on the lower edge of the lowermost panel 11B and provided to the floor.

In the vertical direction of the shutter curtain 13, as shown in FIG. 6, on the inner surface of the flange 31 of the groove-shaped guide rail 30,
Shutter curtain when closed in the length direction of the guide rail
13.Strip-like side 32 of rubber seal that slides the tip on both sides of 13
And a mohair sealing material 33 in parallel with this, forming an airtight structure of the swallowing portion of the shutter curtain 13. In addition, as shown in FIG.
A forage seal material 41 is horizontally mounted on the upper portion of the outer side 6 of A in such a manner as to face the lintel member 40 on the outer side 6 of the shutter slit 21 provided on the lower surface of the storage case 20. In this embodiment, a lintel seal material 41 is also provided on the corresponding indoor 5 side in order to eliminate a difference in construction. In this manner, when the panel shutter 10 is closed, the airtight structure is formed by the outer peripheral side four peripheral edges on both side edges and the upper and lower edges together with the panel 11 stacked on the entire surface.

In the present invention, in the panel shutter 10 as described above, as shown in FIG. 4, the storage case 20 is installed on the inside 5 side of the panel shutter 10, that is, on the high pressure side. The two panel shutters 10 are installed with the storage case 20 supported on the high pressure side of the structure 7. Therefore, the inside of the storage case 20 is a joint of the case front plate 20a and the case bottom plate 20b or a shutter slit.
It communicates with the inside 5 side through 21 and the like, and is at the same pressure as the high pressure side.

Next, as shown in FIGS. 8 (a) and 8 (b) and FIGS. 9 (a) and 9 (b), the sealing rubber 32 is A cutout 15 is provided at the upper edge of the lower panel 11 in a portion of the gap G formed across the joint 14 for preventing packing, and the closing member 16 attached to the lower edge of the upper panel 11 is provided with the cutout 15.
By filling the notch 15, the flat wall surface 17 is formed, and an airtight structure of the flat wall surface and the linear material is formed between the flat wall surface 17 and the sealing rubber 32 on the low pressure side. Here, the closing member 16 is a square piece of hard rubber, the width of which corresponds to the fluctuation in the plane of the shutter curtain 13, and the width of the notch portion is further widened, and the new end of the joint 14 is formed. A drain groove 18 is formed in the portion. In the drawing, reference numeral 15a denotes a closing plate for closing the opening of the side wall of the drain groove 18, and 16a denotes a steel plate for holding the closing member 16.

Further, as shown in FIG. 6, in addition to a conventional guide roller 34 that rolls in contact with the inner surface at the back of the guide rail 30, the end face of each panel 11 also rolls up and down along the flange 31. In addition to supporting the pressure-resistant roller 50, the diameter of the roller 50 is set to be larger than the thickness of the panel 11.

As shown in FIG. 7, the uppermost panel 11A is provided with a pressure-resistant roller 60 that is supported along the upper edge by a horizontal axis parallel to the panel surface. It faces the lintel member 40.

The details of the structure of the end of the joint 14 for preventing finger pinching are described in the invention (Japanese Utility Model Application No.
No. 59441, the name of the invention "Panel shutter airtightness device")
For details of 50 and the horizontal pressure roller 60, reference can also be made to the same device (Japanese Patent Application No. 62-60259, name "Panel Shutter Pressure Roller") of the present applicant.

Here, details of the storage case 20 will be described. FIG. 10 is a vertical cross-sectional view showing the structure of the storage case 20, and FIG. 11 is a vertical cross-sectional view of the storage case 20 when the panel shutter 10 is fully opened and all the panels are stored. As shown in FIG. 10, the storage case 20 is configured as a steel box-shaped case having a shutter slit 21 and is directed to the high pressure side of the structure 7 by a mounting angle 22 and upper and lower support brackets 23. It is fixed and supported. Reference numeral 24 denotes a sprocket, 25 denotes an opening / closing device for the panel shutter 10, 26 denotes a shaft, 27 denotes a horizontal rail for feeding the rolled panel 11, and 28 denotes a partition plate at the back of the storage rail.

In the storage case 20, as shown in FIG. 11, sequentially wound panels are suspended in parallel along the storage rail 27, and a space is provided between the uppermost panel 11A and the lowermost panel 11B. For example, eight panels are arranged in parallel.

In the embodiment of the present invention, each panel includes an intermediate panel 11.
Spacers 19 are attached to both upper surfaces of the. The spacer 19 is made of a rubber or resin member or the like.
Are mounted above the vicinity of the ends of both sides of the panel (FIG. 6), protrude from the panel surface to the same extent as the pressure-resistant roller 50, and are arranged so as to abut against each other on the opposing surface of the adjacent panel 11. .

In the panel shutter 10 of the present invention, the uppermost panel 11
A plurality of pressure-resistant rollers 60 are mounted on the upper part of A so as to face the lintel members 42 of the lintel seal material 41 on both sides. This pressure-resistant roller 60 is shown in FIGS. 12 (a), (b) and (c).
As shown in each figure, the roller body 61 is
It is horizontally supported between the brackets 63, supported by a base 64, and fixed to an upper portion of the panel 11A. The horizontal pressure roller 60 protects the sealing material 41 even when subjected to a large pressure load to prevent damage, and faces the lintel member 42 so that a smooth operation can be performed at the time of starting a closed door. It is mounted to protrude. FIG. 7 shows a pressure-resistant roller 60.
The decorative board 65 in consideration of the appearance from below is shown.

Next, the structure of the guide rail 30 of the panel shutter 10 according to the present invention will be described. 13 shows the relationship between the concrete skeleton 7 and the guide rail 30 in the lower part of the side of the opening 8, (a) is a front view of the inner surface thereof, and (b) and (c) are upper portions thereof. , A horizontal sectional view of the lower part. Thirteenth
In the figure, 71 is a general molded portion of a concrete cubic portion, 72 is a notch below the opening 8, and its height h is set to be at least the width of at least one panel 11 from the floor surface. It is. The guide rail attached to this frame 7 is 30
Is 35 for the lower part and 36 for the upper general part. The lower part 35 of the guide rail 30 is detachably connected to the upper part 36. A cross-sectional view along the line AA in FIG. 13 is shown in detail in FIG. 7, and a cross-sectional view along the line BB in FIG. 13 is shown in detail in FIG. 14 (a). In FIG.
The guide rail 30 is located at the notch 72,
The flange 31 is formed of a first portion 31A and a second portion 31B.
The part 31A is a fixing part that fixes the upper part of the guide rail 30 to the frame 7 as a part of the part 36 or an extension connected thereto, and a part 31A.
Is a separating portion which is separated from the guide rail 30 and is assembled to the fixing portion 31A by a bolt nut 31C at an inward bent portion, and is structurally supported by the support member 9. The support member 9 is composed of a piece angle 91 fixed to the notch 72 by an anchor and a support piece 92 fixed to the separation portion 31B. The support member 9 is fastened back to back by a bolt nut 93 to support the separation portion 31B from the back. ing.
In the present embodiment, the dividing structure of only the lower portion is shown, but the present invention is not limited to this, and it is a matter of course that the dividing structure may be such that it can be divided over the entire length of the guide rail 30. .

Next, reference numeral 80 denotes a finishing member that covers a space 73 between the guide rail 30 and the notched portion 72 of the concrete.
And the separation part 31B. It is as in the prior art that the guide roller 34 rolls and slides inside the groove member 31D.

The structure of the guide rail 30 will be further described with reference to FIGS. 14 (a) and (b). Reference numerals 37 and 38 denote connecting members between an upper portion 36 of the guide rail 30 and a lower separating portion 35,
A horizontal flange is formed by a pair of upper and lower angles, and tightened with a bolt nut 39 to be coupled with high precision.
This connection structure allows the fixed portion 31A
It can be considered that the same applies to the split type of the separation unit 31B.

[Operation] In the embodiment of the present invention configured as described above, the panel shutter 10 installed in the airlock opening 4 of the air dome in which the indoor 5 side is maintained at a high pressure includes a plurality of panels 11,
The opening and closing operation is performed in such a manner that 11 ... is suspended by the connecting chains 12 and 12 at a predetermined interval, and is transformed into a series of up and down postures guided by the guide rails 30 and a parallel storage posture in the storage case 20. is made, the shutter curtain 13 faces in the fully closed state of the shutter, so that the peacetime m ² per 30kg, a large surface pressure load of up to at m ² per 90kg applied. In such a situation, a separate curtain pulling member or mechanism is used to prevent the invasion of outdoor wind and rain, as in the case of installation in a general opening. Considering only the characteristics, not only requires a large-scale airtight structure, but also causes internal pressure leakage from both side edges of the shutter curtain 13 due to the internal pressure receiving pressure, causing abnormal noise due to leakage. Since both sides of the low-pressure side of the shutter curtain 13 are configured to be flat and pressed tightly against the airtight materials 32 and 33 provided on the guide rail 30 by the internal pressure receiving pressure, the indoor 5 side has a high pressure. By using the pressing force that the shutter curtain 13 surface in the fully closed state of the shutter 10 is pressed by a large pressure receiving load from inside while being installed in the kept airlock opening 4. Thus, the air pressure on the indoor 5 side can provide a simple airtight structure that simply considers only the four peripheral edges on the low pressure side of the opening 4 without considering any airtightness on the entry side. In addition to maintaining good airtightness, maintenance and management can be effectively performed without affecting the internal pressure loss even during long-term operation of the air dome.

That is, the surfaces of the panels 11, 11,... Are pressed to the low-pressure side between the two flanges 31 of the guide rail 30 and the two lintels 40, and the low-pressure side sealing material 32 acts in the vertical direction, and in the horizontal direction. Upper lintel sealant 41 and floor sealant 11e
As a result, the shutter curtain 13 comes into close contact with the four peripheral edge openings, so that the opening 8 can be blocked in and out. In the present embodiment, in order to prevent air pressure from flowing out from the joint 14 for preventing finger jamming formed on the outer surface between the adjacent panels 11 and 11 at this time, the closing member 16 is formed in the notch 15. The shutter curtain is mounted so as to be flush with the 13th surface to ensure airtightness. Therefore, even if the air pressure goes into the guide rail 30 or goes into the storage case 20 through the shutter slit 21,
There is no communication with the outside 6 and only the simple airtight structure at the four peripheral edges of the opening has to be considered, and the airtight structure between the shutter 10 and the guide rail 30 is airtight without becoming complicated. By maintaining the shutter 5 in the fully closed state, it is possible to maintain and maintain the shutter by fully removing the guide rail 30 on the inside 5 side. Moreover, since the adhesion force due to the pressing of the panels 11, 11,... Is regulated by the large-diameter pressure roller 50,
Appropriate airtightness can be ensured without damaging the sealing material 32.

Further, by mounting the storage case 20 toward the inside of the air dome 5 toward the air lock opening 4, that is, toward the high pressure side, the inside of the storage case 20 is in the lintel portion or the case when the shutter is fully closed. It can be configured to be in the same pressure state as the indoor side 5 atm by the intrusion of air pressure from the front plate connecting part. The safety maintenance such as maintenance and inspection inside the storage case 20 is performed by the guide rail 30 on the inside 5 side. As in the case where the panel shutter 10 is configured to be detachable, the inspection can be performed by opening and closing the inspection opening in the case 20 with the panel shutter 10 kept closed. Not only is it possible to carry out extremely effective safety maintenance without affecting the internal pressure loss even during long-term operation of the air dome 1 without necessity, There is no need to use an airtight structure, and the production can be performed by ordinary production, so that the cost does not increase.

In addition, when the progress of the airlock opening 4 is controlled by the simultaneous opening and carrying out of the airlock, the air pressure in the air dome 1 flows out of the airlock gate 4 at a pressure of about 22 m per second. Even if the panel shutters 10 and 10 are closed,
Guide rails for transforming to the up-and-down posture by being lifted up by the intrusion wind pressure from the lintel, because the upper edge of the storage rail 27 is hung on the storage rail 27
Despite the structure that the transfer to 30 is not performed well, the outflow airflow is prevented from flowing into the case 20 as much as possible, and the tilt of the panels 11, 11,. Opening / closing operability in which the panels 11 are smoothly transferred can be ensured. Moreover, the roller
Extremely safe traffic management will be performed without damaging durability such as damaging members such as 34. still,
The closed door traffic management of the panel shutters 10 and 10
It is preferable to start from the one built on the inside of the air dome 5. Also, the number of openings provided in one airlock 4 in the present invention has been described for two juxtaposed ones, but there are some airlock gates 4 provided with four openings, In this case, panel shutter 1
Reference numerals 0, 10... All indicate that the storage case 20 is built toward the inside 5 side.

Next, the airtightness between the adjacent panels 11, 11,... Is ensured by the structure on which the upper panel peculiar to the panel shutter is placed. The airtight structure is such that the adjacent panels 11, 11,. Each of them can be moved to the case 20 side, but the movement to the opposite side is a so-called phased stacking structure that is restricted, and a sealing material 11a provided on the upper end surface of the panel 11 of the phased stacking section, It is performed by pressing and contacting with a sealing edge 11b provided at the lower end surface of the panel 11 facing the sealing material 11a, but the panel weight at this time reaches about 100 kg per panel due to a large span,
The lower the panel, the greater the stacking load. However, since the setting blocks 11c and 11b as the panel receiving members are provided on the opposing surfaces of the upper and lower end surfaces of the panel 11 of the phase stacking portion, respectively, the sealing is performed while the panel is placed in an airtight structure. The sealing material 11a is prevented from being damaged without adding any panel weight to the material 11a, and the airtight performance that maintains an appropriate lamination interval between the panels 11 and 11 by setting the thickness of the setting blocks 11c and 11d. Can be secured.

Therefore, by appropriately setting the strength of the pressing force,
For example, when the surface pressure load of peacetime m ² per 30kg is applied to the shutter curtain 13, but in terms pressure load of the average m ² per 30kg is not equipped with full tightness, surface average m ² per 20~15kg pressure load By adjusting the pressing force so that the airtightness is maintained, the air lock gate 5 is maintained in a state where the differential pressure ratio between the inside of the dome 1 and the inside of the air lock gate 5 for adjusting the differential pressure in this embodiment is 30: 0. Causes a pressure leak inside, and the differential pressure ratio becomes 3
At 0:15, the surface pressure load in the dome 1 is m ²
Even a per 30kg, the actual surface pressure load is m ² per 15
As a result, the pressure difference to the shutter curtain 13 can be reduced, and the opening / closing operability at the start of opening the shutter can be smoothly performed.

In addition, since the sealing material 11a and the sealing edge 11b are arranged on the outdoor 6 side of the setting blocks 11c and 11d, for example, the sealing material 11a and the sealing edge 1
Even if 1b is configured to protrude beyond the setting blocks 11c and 11d, the panel transfer between the vertical transfer and the horizontal transfer by the transfer sprocket 24 can prevent the collision avoidance range between the seal material 11a and the seal edge 11b. It is possible to take a large size and to reduce the width of separation between the panels 11 and 11, so that not only smooth transfer with an extremely advantageous transfer trajectory is possible, but also the case 20 is built on the indoor 5 side. Therefore, even if it is a phased construction inclined downward to the indoor 5 side due to this, the intrusion area of rainwater etc. from the joint portion 14 can be minimized and provided on both sides of the panel 11 The cutout 15 to which the closing member 16 is attached is large, and the drainage port is formed, so that it is possible to prevent rainwater and the like that have entered from collecting in this area without affecting airtightness at all. is there.

[Effects of the Invention] In summary, the present invention provides a panel shutter in which a shutter curtain is constituted by a plurality of panels suspended by a connection chain at a predetermined interval, and an airlock for a building in which the indoor side is maintained at a high pressure. In addition to being installed in the opening for use, the low-pressure side edges of the shutter curtain are configured to be flat, and are configured to be in close contact with the airtight material provided on the guide rail by the receiving pressure of the internal pressure. The shutter curtain surface in the fully closed state of the shutter, while being installed in the airlock opening kept at The barometric pressure provides a simple airtight structure that simply considers only the low pressure side four peripheral edges of the opening without considering any airtightness at the entry side. In addition to being able to maintain reliable airtightness, safety maintenance such as maintenance and inspection is carried out by splitting and removing the indoor side guide rail with the panel shutter closed. Since the rollers can be inspected, there is no need to open and close the shutter, and even during long-term operation of the air dome, extremely effective safety maintenance is performed without affecting the internal pressure loss. Can be made possible.

[Brief description of the drawings]

1 is a schematic plan view of the entire air dome, FIG. 2 is a schematic sectional view taken along a center line, FIG. 3 is a sectional view of a gate portion provided with an air lock, and FIG. 4 generally shows the air lock. 5, FIG. 5 is an overall perspective view from the outer surface of the panel shutter, FIG. 6 is a detailed plan view of a side end portion of the panel shutter including a guide rail, and FIG. 7 is a vertical sectional view of the same upper part. 8 (a) and 8 (b) are perspective views illustrating an airtight structure between the panels, FIG. 9 (a) is an elevation view thereof,
(B) is a plan view thereof. FIG. 10 is a cross-sectional view showing the structure of the storage case, and FIG. 11 is a cross-sectional view showing the storage state of the panel. (A), (b), and (c) of FIG. 12 are a front view, a top view, and a side view of the upper pressure roller, respectively. Thirteenth
14A, 14B and 14C are explanatory views showing the structure of the lower part of the guide rail, and FIGS. 14A and 14B are a horizontal sectional view and a side view of a connecting portion of the guide rail. . FIG. 15 is a side view of the lower part of the guide rail for explaining the installation of the panel shutter. DESCRIPTION OF SYMBOLS 1 ... Air dome, 2 ... Arena, 3 ... Audience seat, 4 ... Air lock, gate, 5 ... Inside, 6 ... Outside, 7 ... Structure, 9
... Support member, 10 ... Panel shutter, 11 ... Panel, 11A
… Top panel, 11B… Bottom panel, 11a… Seal material,
11b: Seal edge, 11c, 11d: Setting block, 12: Chain, 13: Shutter curtain, 14: Joint for preventing finger jamming, 15: Notch, 16: Closing member, 17: Flat surface, 18: Drain port , 19 ... spacer, 20 ... storage case, 21
… Shutter slit, 30… Guide rail, 31… Flange, 32… Strip, seal rubber, 33… Mohair seal material, 34
... guide rollers, 40 ... lintel aggregate, 42 ... lintel members,
41: lintel seal material, 50: large-diameter pressure-resistant roller, 60: horizontal pressure-resistant roller, 80: finishing member, G: gap.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Ando 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industrial Co., Ltd. (72) Inventor Yasuo Maruyama 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo No. 1 Sanwa Shutter Industry Co., Ltd.

Claims (1)

(57) [Claims] 1. A panel shutter having a shutter curtain constituted by a plurality of panels suspended by a connecting chain at a predetermined interval is installed in an airlock opening of a building whose indoor side is maintained at a high pressure. An airtight structure for a panel shutter at an air dome opening, wherein both side edges of the low pressure side of the shutter curtain are configured to be flat and press-contacted with an airtight material provided on a guide rail by an internal pressure receiving pressure. .