JPH0520869Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention relates to a revolving door for an air tent used for ceremonies, events, and other events.

"Prior Art" Conventionally, airtight revolving doors have been used at the entrances and exits of mobile air tents used for ceremonies, events, and other events. In this case, the airtight revolving door had to be installed directly on the ground or on a paved surface. This is because a floor hinge case D is provided on the lower surface of the circular floor plate C, and the heavy door G and the door rotation shaft are supported upright by the thrust bearing and radial bearing inside the case D. (with equipment) D is large, and it is necessary to construct a foundation H to support the floor hinge case D, where the load is concentrated, and the height of the case D is high, so the height from the ground I to the floor plate C is The length was approximately 300mm, and as shown in Figure 8, it was necessary to provide a staircase S (steel frame step stool) to climb up to the floorboard C.

``Problems to be solved by the invention'' This invention aims to create a revolving door that uses a housing only installed on the floor, but has a low entrance/exit floor and does not require stairs or slopes for entrance/exit. That is.

``Means for Solving the Problems'' This proposal supports the hem of a pneumatically inflated tent membrane on the ground or floor surface, maintains a space inside the membrane, and provides an airtight revolving door at the entrance/exit of the tent membrane. In the revolving door of an air tent, a pair of arc-shaped side plates are arranged opposite to each other at the entrance and exit part, and the upper and lower ends of both side plates are integrally connected by a disk-shaped top plate and a floor plate to form a vertical cylinder. A casing is provided, and a passage is provided from the front opening of the casing to the inside of the air tent via the rear opening, and a thrust bearing is provided in the center of the top plate to support the upper part of the door rotation shaft and rotate it at the same time. A shaft is suspended in the cylindrical case, a plurality of airtight revolving doors capable of closing passages within the case are provided on the door rotation shaft, and a radial bearing is provided in the center of the floor plate, and a lower end of the rotation shaft is provided with a radial bearing at the center of the floor plate. Support legs of the cylindrical casing are provided on the lower surface of the floor plate to support the side surfaces, and an overhanging membrane at the entrance/exit portion of the air tent is connected to the cylindrical casing.

"Function" Therefore, the vertical cylindrical housing 5 made up of the arc-shaped side plates 2, 2, the top plate 3, and the floor plate 4 is connected to the entrance/exit part 1 of the air tent.
Place it in A door rotating shaft 7 is disposed at the center of the casing 5, the upper end of which is supported by a thrust bearing 6 on the top plate 3, and the rotating shaft 7 is suspended from the center of the vertical cylindrical casing 5. The lower end is supported by a radial bearing 8 provided on the floor plate 4 to prevent the rotating shaft 7 from swinging. In addition, by connecting the overhanging membrane at the entrance and exit of the air tent to the cylindrical casing,
Together with the revolving door, it maintains the airtightness of the air tent. The weight of the rotating shaft 7, the airtight rotating door 9 provided thereon, the thrust bearing casing of the top plate 3, the weight supporting frame of the rotating door, etc. are determined by the arc-shaped side plates 2, 2.
The radial bearings 8, which are distributed and supported on the ground or floor surface 12 via the radial bearings 8 and provided on the floor plate 4 side, may be low and small.

"Example" Tent membrane 10 inflated by air pressure (plane shape 9m x 21m, 9m x 16m cocoon shape, maximum height 4.5m)
m, floor area 170 to 125 ^m2 , seating capacity 150 to 100 seats, material: PVC-coated polyester woven fabric, bonding material: open fastener). Therefore, by blowing air inside the tent membrane 10 and keeping the air pressure inside it slightly higher than atmospheric pressure, the tent membrane 10 swells into a dome shape or a cocoon shape as shown in FIGS. 5 and 6. A space can be maintained inside the tent membrane 10, and an air tent with an air membrane structure is formed. An entrance/exit part 1 is formed on the side surface of the tent membrane 10 by an overhanging membrane 14, and an airtight revolving door 9 is provided in the entrance/exit part 1. This revolving door 9 is provided in a vertical cylindrical housing 5 provided in the entrance/exit section 1, and the housing 5 has arcuate side plates 2, 2 arranged opposite to each other on both sides of the entrance/exit section 1, and the upper and lower ends thereof are arranged oppositely. The top plate 3 and the floor plate 4 are integrally connected, and the upper end of the rotating shaft 7 of the revolving door 9 is inserted into a machine casing 15 provided on the center of the top plate 3, A flange 16 provided at the upper end of the coaxial shaft 7 is supported by a thrust bearing 6 provided in the machine casing 15 and suspended in the center of the passage 5. The lower end side surface of the rotating shaft 7 is supported by a radial bearing 8 provided at the center of the floor plate 4. Further, the overhanging membrane 14 of the air tent is connected to the tip insertion groove 21 provided on the outer surface of the casing 5.

Therefore, a passage is formed from the front opening 5a of the casing 5 to the inside of the air tent via the rear opening 5b, and this passage can be closed by the airtight revolving door 9. Airtightness is maintained. Of course, a radial bearing 17 for the rotating shaft 7 may be provided in the machine casing 15 to support the side surface (see FIG. 3). Since the radial bearing 8 is small, the floor plate 4 is 50 to 80 mm from the ground or floor surface 12.
The height is good. In the figure, 18 indicates the upper support frame of the top plate 3, 19 indicates the covering disk of the support frame 18, and 2
0 is a cylindrical side plate between the disk 19 and the top plate 3, 22 is a traction strip that presses the overhanging membrane 14 in the groove 21, 23 is a traction turnbuckle, 24 is a support leg of the floor plate 4,
25 is a bottom weight rod of the tent membrane 10, 26 is the same rod 2
5 is a cover plate, 27 is a mounting bolt for the revolving door 9, 2
8 is a link between doors 9 and 9.

``Effects of the Idea'' As mentioned above, in this invention, the revolving door of the air tent is formed by the unit-shaped vertical cylindrical housing 5 consisting of a pair of arc-shaped side plates, a top plate, and a floor plate, so that air When assembling the tent, it can be easily installed at the entrance/exit part 1 of the air tent.

Furthermore, since the airtight revolving door 9 and the rotating shaft 7 are suspended and supported within the housing 5, the door 9
The load is distributed to the floor plate 4 side through the arc-shaped side plate 2 of the casing 5. Therefore, even if the door is a heavy revolving door, the lower end side of the rotating shaft 7 is supported by a simple radial bearing 8. It is sufficient to support the floor plate 4, and there is no need to perform foundation work for the floor plate 4.

Therefore, the housing 5 can be installed extremely easily compared to conventional ones, and the floor plate 4 can be installed on the ground or on the floor surface 12.
To obtain a revolving door which can be supported at a low level, does not require a conventionally required staircase between the ground or a floor surface 12, and a floor plate 4, which simplifies construction work, and allows easy access into and out of an air tent. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view showing the revolving door of the air tent of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged vertical cross-sectional view of the revolving door section, and Fig. 4 is a view similar to Fig. 2. Fig. 5 is a front view of the air tent, Fig. 6 is a side view of the air tent, Fig. 7 is a plan view of Fig. 6, and Fig. 8 is a side view of a conventional revolving door entrance. . 1... Entrance/exit portion, 2... Arc-shaped side plate, 3... Top plate, 4... Floor plate, 5... Vertical cylindrical housing, 6... Thrust bearing, 7... Door rotating shaft, 8... Radial bearing, 9...Airtight revolving door.

Claims (1)

[Scope of utility model registration request] In a revolving door for an air tent, the hem of a pneumatically inflated tent membrane is supported on the ground or floor surface to maintain a space inside the membrane, and an airtight revolving door is provided at the entrance and exit of the tent membrane, A pair of arcuate side plates are placed opposite each other at the entrance and exit, and the upper and lower ends of the side plates are integrally connected by a disk-shaped top plate and a floor plate to form a vertical cylindrical case, and the front opening of the case A passage is provided from the top plate to the inside of the air tent through the rear opening, a thrust bearing is provided in the center of the top plate to support the upper part of the door rotation shaft, and the rotation shaft is suspended within the cylindrical casing; A plurality of airtight revolving doors capable of closing the passage within the housing are provided on the door rotation shaft,
A radial bearing is provided in the center of the floor plate to support the side surface of the lower end of the rotating shaft, and support legs for the cylindrical casing are provided on the lower surface of the floor plate, and the overhanging membrane of the entrance and exit portion of the air tent is A revolving door for an air tent characterized by being connected to a cylindrical casing.