JP3103426B2 - Open / close dome seal structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a dome constituting a ceiling of a field divided into a plurality of dome sections.
The present invention relates to a seal structure of an open / close dome that is used for an open / close dome that opens and closes by relatively moving each dome section so as to overlap each other, and seals an overlapping portion of each dome section when the open / close dome is closed.

[0002]

2. Description of the Related Art In recent years, a dome-shaped roof has been attached to a stadium to form an all-weather stadium. Thereby, the game can be played regardless of the weather. Also, since the air conditioning can be controlled to a desired temperature, humidity, or the like, various games can be played regardless of the season.

[0003] However, in a stadium which is always closed, it is necessary to always manage lighting, air conditioning and the like. In order to solve this, if it is possible to compete outdoors, such as in fine weather, it is necessary to open the stadium. A so-called open / close type that closes when it is impossible to compete outdoors, such as in rainy weather, has been considered.

[0004] As an example of the openable dome, there is a structure in which the dome is divided into three parts, each of which is formed into a fan shape like a so-called ginkgo leaf, and the arc-shaped outer periphery is supported on the upper part of a wall covering the field. One of the three divided domes is a fixed dome section. In the other two, the arc-shaped outer periphery is connected to an arc-shaped rail formed on the upper portion of the wall body, and a movable dome section movable along the rail is formed.

Since each dome section has the same shape, when opened, the two movable dome sections overlap each other and move so as to overlap the fixed dome section. Thus, when three dome sections are superimposed, two thirds of the dome is opened. In the case of rainy weather, the movable dome sections are rotationally moved in opposite directions around the same center of rotation, so that the three dome sections partially overlap. As a result, the dome is fully closed.

As described above, by opening and closing the dome by dividing the dome into a plurality of sections, the dome can be realized.

However, when the dome section is divided into the plurality of dome sections, there is a problem particularly in sealing a gap in a closed state. As a means for applying a seal, it is possible to always keep the upper surface of the lower dome section and the lower surface of the upper dome section in contact with each other by using a fin such as an elastic body. Leakage may occur due to deterioration over time or the like, and the airtightness is reduced, and the constant contact type is not preferable.

For this reason, a tube is arranged on the upper surface of the lower dome section in each gap, and after the closing operation of the dome, internal pressure is applied to the tube to expand the tube, and the outer periphery is placed on the lower surface of the upper dome section. It is considered to be in contact. Thereby, the inner pressure can be reduced during operation and the outer periphery of the tube and the dome section can be separated from each other, so that there is no occurrence of rain leakage or the like due to deterioration over time, and airtightness can be maintained.

[0009]

However, when an internal pressure is applied to the tube, the tube is evenly expanded, so that the tube has a circular cross section perpendicular to the axis. This inflated circular diameter must be larger than the gap between the dome sections. Therefore, dimensions in unnecessary directions such as the lateral direction are enlarged, the tube becomes large, the amount of air to be sent inward is increased, which leads to an increase in the inflation time and a reduction in working efficiency.

[0010] In consideration of the above fact, the present invention expands the tube in an efficient shape and reduces the amount of air supplied into the tube when sealing the gap of the dome section by expanding the tube. It is an object of the present invention to obtain a seal structure of an opening / closing dome that can expand in time and improve work efficiency.

[0011]

According to the first aspect of the present invention, a dome constituting a ceiling portion of a field is divided into a plurality of dome sections, and each dome section is relatively moved and opened and closed so as to overlap each other. A main tube, which is used for an opening / closing dome and seals a gap between the dome sections when the opening / closing dome is closed, is attached to an upper surface of a lower dome section, and is expanded by gas supply. A sub-tube attached to the upper end of the tube and communicating with the main tube and in contact with the lower surface of the upper dome section when inflated; and a guide member for guiding the expansion direction of the main tube toward the upper dome section. doing.

According to a second aspect of the present invention, the dome section is connected to a fixed dome section supported and fixed to an upper portion of a wall surrounding the field via a rail portion formed in an arc shape on the upper portion of the wall. A movable dome section that is supported and rotatable along the rail section,
The main tube and the sub tube are arranged around the center of rotation on the lower upper surface of each of the dome sections overlapping each other.

According to a third aspect of the present invention, a pair of tubes branching from the main tube and the sub tube are independently disposed on the vertical wall portion which is approached and separated according to opening and closing of each of the dome sections. The pair of tubes are in contact with each other in a closed state of each dome section to seal a gap between the vertical wall portions.

[0014]

According to the first aspect of the present invention, the internal pressure of the main tube and the sub-tube mounted on the upper surface of the lower dome section in the dome open / closed state, that is, in a state in which the plurality of dome sections are almost completely overlapped. Is kept low. As a result, the main tube and the sub tube are in a deflated state, and the sub tube does not come into contact with the lower surface of the upper dome section.

Here, when the dome sections are relatively moved to close the dome, in the fully closed state, only a part of the periphery of each dome section overlaps. During this movement, the subtube is not in contact with the upper dome section, so that it does not deteriorate.

When each dome section is closed,
The gas is sent into the main tube and the sub tube to apply internal pressure. As a result, the may tube expands, but the expansion shape is limited by the guide member,
The cross section in the direction perpendicular to the axis of the main tube is not a circular shape, which is an expanded shape in a free state, but a vertically elongated shape in the lower surface direction of the upper dome section. Therefore, the main tube can be closer to the upper dome section than when the main tube is expanded in a free state.

The sub tube expanded together with the main tube comes into contact with the lower surface of the upper dome section. Thus, the gap between the upper dome section and the lower dome section is sealed by the main tube and the sub tube, whereby the airtightness when the dome is closed can be maintained, and it is possible to prevent rain leakage and the like.

As described above, since the expanded shape of the main tube is vertically long and the two-stage structure (dharma type) of the main tube and the sub tube is used, it is not necessary to make the outer shape of the main tube inflated so much. The amount of gas to be sent can be reduced. Further, by reducing the amount of gas, the time for inflating the main tube can be shortened, and the working efficiency can be improved.

According to the second aspect of the present invention, the dome section is divided into a fixed dome section and a movable dome section. For example, when there is one fixed dome section and two movable dome sections, three dome sections overlap each other in the open state, so that the dome opening ratio is 2/3. When the movable dome section is rotationally moved along the rail, a gap is created between the dome sections at the center of rotation. Therefore, a main tube and a sub tube for sealing the overlapping portion of each dome section are provided around the rotation center. This makes it possible to seal the center of rotation of the movable dome section.

According to a third aspect of the present invention, when a vertical wall portion is provided to close a gap based on the thickness of each dome section in the dome closed state, the space between the vertical wall portion and the dome section is closed. A pair of tubes, each of which has been expanded in advance by the internal pressure, is disposed on the vertical wall. Accordingly, these tubes come into contact with each other at the time of closing, and the vertical wall portion can be sealed.

[0021]

1 and 2 show a perspective view and a plan view of a dome stadium 10 according to this embodiment. The dome stadium 10 has a cylindrical wall 12 whose periphery is erected on the ground.
A step-like audience seat 14 is provided on the inner peripheral surface side. The audience seat 14 and the field 16 are separated by a fence 18.

As shown in FIGS. 1 and 3, the wall 12
Has a slope on the upper inner peripheral side, and 2
The grooves 20 and 22 are provided in a circular shape around the rotation center CL (see FIG. 4). The roof 24 of the dome stadium 10 (hereinafter referred to as the dome 2) is located below the grooves 20 and 22.
4) of the fixed dome section 26
(Indicated by vertical hatching in Fig. 4 for easy understanding)
Is supported.

As shown in FIG. 4, the fixed dome section 26 has a fan-like shape in plan view that is very similar to a ginkgo leaf whose both sides are gradually separated and whose ends are connected by a substantially 1/3 arc. , About 1 space above the dome stadium 10
/ 3. The fixed dome section 26 has a truss structure, and the fan-shaped outer circular arc portion is as shown in FIG.
The grooves 20, 22 of the wall 12 via the substantially V-shaped support portion 28
It is fixed below. Therefore, all the loads applied to the fixed dome section 26 are transmitted to the wall 12 via the support member 28.

As shown in FIG. 3, the grooves 20, 22 have their opening deeper than the width of the opening.
The storage units 34 and 36 of the support carts 30 and 32 are provided.

At predetermined portions of the receiving portions 34 and 36 in the upper and lower grooves 20 and 22, rails 38 are laid in a longitudinal direction around the field 16 in a circular shape around the rotation center CL. I have. A total of six rails 38 are provided in one accommodating portion, and correspond to the rollers 40 supported by the supporting carts 30 and 32, respectively. Therefore, the support carts 30 and 32 are supported by the six rails 38 via the rollers 40.

A substantially V-shaped support member 42, 44 is pivotally supported on the support carriages 30, 32, and a frame of movable dome sections 46, 48 of a truss structure that forms the dome 24 together with the fixed dome section 26 is assembled. Can be Therefore, all the loads applied to the movable dome sections 46 and 48 are transmitted to the wall 12 via the support members 42 and 44 and the support carts 30 and 32. The movable dome section 46 is shown in FIG. 4 with upward-sloping hatching, and the movable dome section 48 is shown with downward-sloping hatching.

In the fixed dome section 26 and the movable dome sections 46 and 48, the above-mentioned skeleton is covered with an outer plate 50 (in FIG. 4, the upper movable dome section 46 in FIG. 4).
Only the outer plate 50 is shown), and the inside and outside of the dome 10 are shielded.

The fixed dome section 26 and the movable dome sections 46 and 48 are formed so that their longitudinal sections are concentric.
A state in which the movable dome sections 46 and 48 overlap the fixed dome section 26 in FIG.

The supporting carts 30, 32 for supporting the movable dome sections 46, 48 are movable along the rails 38 by the driving force of a driving means (not shown). The upper movable dome section 46 and the lower movable dome section 48 move in the opposite directions (the directions of arrows A and B in FIG. 4) from the overlapping state, and each move about 120.
At the time of the rotational movement, the side edges overlap as shown in FIG. 4, and this state is the dome closed state. A predetermined gap (dimension C in FIGS. 3 and 5, for example, about 60 cm) is formed between the upper movable dome section 46 and the lower movable dome section 48. Also, the lower movable dome section 48 and the fixed dome section 2
A predetermined gap (approximately 60 cm) is also formed in a portion overlapping with No. 6.

On the other hand, the fixed dome section 26 extends from the side end 26A of the side edge overlapping with the movable dome section 46 when the dome is closed toward the upper movable dome section 46, that is, vertically upward in FIG. The rib 52 shown is provided upright. The upper end of the rib 52 is flush with the upper end of the movable dome section 48,
Thereby, the gap between the upper end of the rib 52 and the lower end surface of the movable dome section 46 when the dome is closed is also about 60 cm.
It has been. When the dome is closed, the side end 48A of the movable dome section 48 rotates in the direction of arrow B in FIG.
Overlap the fixed dome section 26.

As described above, the three dome sections 2
6, 46 and 48 have a constant vertical gap (approximately 60 cm) in a portion overlapping each other in a plan view, so that the movable dome sections 46 and 48 do not interfere with each other when moving.

As shown in FIG. 5, the vicinity of the rotation center CL of the three dome sections 26, 46, 48 always overlaps in plan view regardless of the rotation position of the movable dome sections 46, 48, and Each of the gap C portions (the movable dome section 4 near the rotation center CL)
6 and 48 are thin and have wide gaps), and are connected by shock absorbers 54 and 56.
As is well known, the shock absorbers 54 and 56 have a configuration in which a fluid moves between two chambers divided by a piston through an orifice having a predetermined diameter to reduce the impact.

The shock absorbers 54 and 56 are used in emergency situations, for example, due to earthquakes or strong winds.
It has the function of preventing the members 6 and 48 from touching each other when they swing.

The dome 24 constructed as described above is opened when the weather is good such as fine weather or the like, and is closed when the weather is bad such as rainy weather. can do.

Here, as shown in FIG. 4, a seal portion 58 is disposed in a substantially radial direction about the rotation center CL at portions overlapping each other when the dome is closed. The seal portion 58 is attached to a dome section located below the two overlapping dome sections. Hereinafter, the seal portion 58 between the fixed dome section 26 and the lower movable dome section 48 will be described as an example.

As shown in FIG. 6A, the sealing portion 58
Is a main tube 60 having a cylindrical section perpendicular to the axial direction.
And a sub-tube 62.

The main tube 60 is composed of a pair of rubber sheets 60A and 60B, and the lower ends of these sheets 60A and 60B are fixed to the fixed dome section 2A.
6 are fixed to the upper surface by fixing bolts 60C and 60D. Further, both ends of a thin plate 66 are adhered to the upper ends of the sheets 60A and 60B from below in FIG. 6A, respectively, and the upper ends of the sheets 60A and 60B are opposite to the plate 66 (FIG. The widthwise ends of the sub-tubes 62 that are bent in an arc shape from above (A) are in close contact with each other. On both ends of the sub tube 62, FIG.
As shown in (B), the plate 70 is in contact, and bolts 74 penetrate both ends of the plates 66, 70, the sheets 60 </ b> A, 60 </ b> B and the sub tube 62, and are screwed to the nut 72.

Thus, the ends of the sheets 60A and 60B are tightly sealed with both ends of the subtube 62. Since the plate 66 connects both ends of the sheets 60A and 60B, the seal portion 58 has a two-stage circular shape as a whole. The connection by the plates 66 and 70 is formed intermittently along the longitudinal direction of the seal portion 58. Also, the seats 60A and 60B and the sub tube 6
An adhesive is applied to the close contact portion 2.

The main tube 60 and the sub tube 62 can be supplied with air by an air supply means (not shown), and have a structure in which an internal pressure is applied in accordance with an amount of supplied air and expands. Here, since the internal pressure is generally evenly applied to the inner peripheral surface, the main tube 6
0, the subtube 62 expands so that the cross section perpendicular to the axis becomes circular.

In this embodiment, the fixed dome section 26
A guide plate 64 as a guide member is attached so as to surround the main tube 60. This guide plate 64
Cover the lower half of the main tube 60 and fasten the base together with the seats 60A, 60B to the fixed dome section 26 with the fixing bolts 60C, 60D.
A, 60B fixed lower dome section 2 respectively
6 is sandwiched between them. The guide plate 64 is bent so as to widen the facing gap from the middle portion to the upper end, thereby restricting the expansion of the lower half of the main tube 60. For this reason, the expansion of the lower half of the main tube 60 is restricted, and the upper half where the guide plate 64 is not present expands more than the lower half. As a result, the main tube 60 has a vertically long elliptical shape (FIG. 6 (A)). )). Also, the guide plate 6
4 and fixed dome section 26 to seat 60
The airtightness of the lower end of the main tube 60 is ensured by sandwiching the lower ends of A and 60B.

Here, the main tube 60 and the sub tube 62 are not supplied with air when the dome is opened and the movable dome section 48 is rotationally moved, and are contracted. It is designed not to touch. However, after the dome is closed, the main tube 60 and the sub tube 6
When air is supplied to the inside of the dome section 2 and a predetermined internal pressure is reached, the sub tube 62 comes into contact with the movable dome section 48, and the fixed dome section 26 and the movable dome section 4
8 is sealed (see the solid line in FIG. 6A). The surface of the movable dome section 48 where the subtube 62 abuts is concave (upwardly convex) in an arc shape, and the width direction of the arc surface (the relative movement between the fixed dome section 26 and the movable dome section 48). Ribs 48A are formed at both ends (in the direction side) to prevent rain or the like from penetrating into this gap.

As shown in FIG. 7, such a sealing structure includes a tip of a rib 52 provided at an opposite end of the fixed dome section 26 facing the lower movable dome section 46 and an upper movable dome section. 46, and between the lower movable dome section 48 and the upper movable dome section 46, respectively.

As shown in FIGS. 7 and 8A, an arc-shaped seal portion is provided on the upper surfaces of the fixed dome section 26 and the lower movable dome section 48 so as to surround the shock absorbers 54 and 56. 76 are provided. Note that the arc-shaped seal portion 76 on the fixed dome section 26 has an approximately 1/2 arc shape, and the arc-shaped seal portion 76 on the upper surface of the lower movable dome section 48 is 3 /
Each of the four circular arcs is disposed closer to the outer periphery of the sectoral arc of the fixed dome section 26 and the movable dome section 48 than the center of rotation CL (supporting portions for the supporting carriages 30 and 32). The structure of the arc-shaped seal portion 76 is formed by extending the two-stage seal portion 58 formed by the main tube 60 and the sub tube 62.

A vertical wall seal portion 82 is provided between a vertical wall portion 78 which is a side surface of the rib 52 in the fixed dome section 26 and a vertical wall portion 80 which is a side surface of the lower movable dome section 48. ing. Vertical wall seal 82
Is a vertical wall tube 84 attached to the vertical wall portion 78 side.
And a vertical wall tube 86 attached to the vertical wall portion 80 side.
And The vertical wall tubes 84 and 86 are formed of rubber sheets bent in an arc shape similarly to the sub tube 62, and both ends in the width direction are flanged, and the vertical wall portions 78 and 80 are formed by fixing means (not shown). Respectively.

Here, when the fixed dome section 26 and the lower movable dome section 48 overlap (when the dome is opened), the vertical wall portion 80 is different from the side where the rib 52 of the fixed dome section 26 is formed. The vertical wall portions 78 and 80 are separated from each other, and the vertical wall tubes 84 and 86 are separated from each other because they are flush with the opposite side surface (see the dashed line in FIG. 8B).

When the lower movable dome section 48 rotates about the rotation center CL as shown by an arrow F in FIG. 8B to close the dome, the vertical wall portion 80 becomes the vertical wall of the fixed dome section 26. Gradually approaching the portion 78 (FIG. 8)
(See the imaginary line in (B)), the vertical wall tubes 84, 86 contact each other in a completely closed dome state, and the vertical wall portions 78, 80
The gap between them can be sealed.

Here, the sub tube 62 on the rib 52
The vertical wall tube 84, the subtube 62 of the arc-shaped seal portion 76 on the fixed dome section 26, and the subtube 62 of the seal portion 58 provided on the fixed dome section 26 are formed by one continuous member. Have been. Further, a main tube 60 constituting an arc-shaped seal portion 76 on the fixed dome section 26 and a seal portion 58 provided at a side end of the fixed dome section 26 opposite to the side on which the rib 52 is formed. And the main tube 60 are formed by one continuous member.

Further, the vertical wall tube 86, the subtube 62 of the arc-shaped seal portion 76 between the movable dome sections 46 and 48, and the subtube 62 of the seal portion 58 between the movable dome sections 46 and 48 are connected. It is formed of one member.

The end of the main tube 60 on the rib 52 abutting on the vertical wall seal 84 and the end of the main tube 60 on the arcuate seal 76 abutting on the vertical wall seal 86 are closed. ing. Further, the end of the main tube 60 of the arc-shaped seal portion 76 on the fixed dome section 26 abutting against the vertical wall portion 78 is also closed. Further, the ends of the respective seal portions 58 extending in three directions in the radial direction are also closed.

When the dome is closed, the seal portion 58, the arc-shaped seal portion 76 and the vertical wall seal portion 82 have the fixed dome section 26 and the lower movable dome section 48.
Is sealed by the vertical wall seal portion 82, the arc-shaped seal portion 76 on the fixed dome section 26, and the seal portion 58 of the fixed dome section 26 on the side opposite to the side where the rib 52 is formed. Further, a gap between the fixed dome section 26 and the upper movable dome section 46 is sealed by a seal portion 58 on the rib.
Further, a gap between the upper movable dome section 46 and the lower movable dome section 48 is formed by an arc-shaped seal 76 on the lower movable dome section 48 and a seal portion 58 on the lower movable dome section 48. And sealed by.

For this reason, as shown in FIG. 7, all the gaps between the three dome sections 26, 46, 48 can be filled.

As shown in FIG. 9, holes 88 are formed in a plurality of portions of the vertical wall portions 78, 80 where the vertical wall tubes 84, 86 are provided, and a cylinder rod 90 is formed.
Is penetrated, and the distal end of the cylinder rod 90 is inserted into the vertical wall tubes 84 and 86.

The cylinder body 92 for driving the cylinder rod 90 includes vertical wall tubes 84 of vertical wall portions 78 and 80,
The cylinder rod 90 is fixed to the side opposite to the side on which the cylinder rod 86 is disposed, and the cylinder rod 90 can be expanded and contracted by hydraulic pressure.

A pressing plate 94 is attached to the distal end of the cylinder rod 90. When the dome is closed, the cylinder body 92 pushes the cylinder rod 90, so that the pressing plate 94 moves the vertical wall tubes 84 and 86. The configuration is such that the opposing walls are pressed in the lateral direction in close contact with each other. Thereby, the vertical wall tubes 84 and 86 are brought into close contact with each other without dropping by gravity, and
The airtightness between 4, 86 is maintained.

As shown in FIG. 3 and FIG.
A concave portion 96 is provided at the uppermost portion and has a role as an upper gutter (only a part of the concave portion 96 is shown in FIG. 10). The recess 96 is provided over the entire circumference of the wall 12. A part of the upper movable dome section 46 protrudes like an eave into the recess 96.

A rubber sheet 100 is suspended from a lower surface of the protruding movable dome section 46 via a substantially L-shaped bracket 98. This sheet 100
Is in contact with the side surface forming the recess 96. The seat 100 is provided over the entire outer circumference of the circular arc of the upper movable dome section 46, whereby the upper movable dome section 46 and the wall 12
To seal the gap.

Inside the sheet 100, a plurality of fins 102 (two in this embodiment) extending obliquely downward are projected. The wall 1 corresponds to the upper fin 102.
A lightning arrester pipe 104 is provided on the upper surface (between the concave portion 96 and the slope portion where the grooves 20 and 22 are formed) of the light-emitting device 2. The lightning protection pipe 104 has a substantially L-shaped flange 106 formed on a part of its outer periphery.
6 is fixed to the substantially L-shaped bracket 108, so that the lightning arrester pipe 104 is held by the wall 12.

The lightning arrester 104 is grounded by conducting means (not shown). As shown in FIG. 11, the lightning protection pipe 104 has a circular axis disposed over the entire circumference of the wall body 12, and the movable dome section 46 on the upper side is provided with a fin of the sheet 100. It is configured to rotate while maintaining contact with 102 (in the direction of arrow D in FIG. 11).

That is, the lightning arrester pipe 104 has a role as a sealing member and also a role as a lightning rod.

As shown in FIGS. 3 and 12, a recess 110 is provided between the groove 20 and the groove 22 to serve as a middle gutter (in FIG. 12, the recess 11 is used).
0 only). The recess 110 is provided over the entire circumference of the wall 12. As shown in FIG.
The middle movable dome section 48 protrudes outward from the inner peripheral opening corner of the recess 110.

The protruding movable dome section 48
The lower surface of the seat 11 has a substantially L-shaped bracket 111 similar to the upper movable dome section 46.
2 are provided, and the lower end portion is in contact with the side surface of the concave portion 110. Also, the fins 11 protruding from the seal 112
The same applies to the configuration in which 4 is in contact with the lightning arrester pipe 116. That is, the L-shaped flange 117 protruding from the lightning arrester pipe 116 is fixed via the substantially L-shaped bracket 119 fixed to the wall 12, and the sheet 112 contacts the lightning arrester pipe 116. (See arrow E in FIG. 11).

The lightning arrester 116 that comes into contact with the sheet 112 of the lower movable dome section 48 is a wall 1
It is not necessary to dispose it on the entire circumference of 2, and it suffices if it is within the movable range (about 240 °) of the lower movable dome section 48.

On the other hand, since the arc-shaped periphery of the fixed dome section 26 is sealed by a seal member (not shown), when the dome 24 is in the closed state, the entire arc-shaped periphery of each dome section is covered by the seal member and the seat 10.
0, 112 will be sealed.

Here, the gap between each dome section is
Although the seal is provided by the seal portion 58 and the like, the gap between the movable dome sections 46 and 48 and the wall body 12 (in the direction perpendicular to the paper surface of FIG. 3) is small, so that the seal cannot be sealed with the same configuration as described above. .

Therefore, in the present embodiment, FIGS.
As shown in FIG. 2, brushes 118 and 120 are provided at the side ends of the movable dome sections 46 and 48 on the opposing surfaces of the movable dome sections 46 and 48 and the wall body 12, respectively. As shown in FIG.
8 and 120 are constituted by a plurality of linear rods having elastic force standing upright from elastic sheets 121 laid on the movable dome sections 46 and 48 and the wall 12, respectively. Each of the brushes 118 and 120 has a predetermined width, and has a length at which the tips of the brushes overlap each other. Thereby, the brushes 118 and 120 are relatively movable and airtightness is maintained.

Further, as shown in FIG.
8, 120 width direction (dome section relative movement direction)
Airtight sheets 122 and 124 made of vinyl are interposed in the middle part in the longitudinal direction, and the base part is fixed to the elastic sheet. In addition, the airtight sheets 122, 1
The length 24 is the same as the length of the brushes 118 and 120 so that the tips overlap.

The brushes 118 on the movable dome sections 46 and 48 correspond to the brushes 120 on the wall 12 in the closed dome state so that the tips thereof overlap. At the same time as the brushes 118 and 120 overlap with each other, the tips of the airtight sheets 122 and 124 come into contact with each other, thereby improving the airtightness as compared with the case where only the brushes 118 and 120 are sealed.

The operation of this embodiment will be described below. When the weather is fine, etc., the movable dome sections 46 and 48
The entire surface is superimposed on the fixed dome section 26. Thereby, the upper part of the spectator seat 14 and the field 16 surrounded by the wall body 12 is opened about 2/3, and it is possible to give a feeling of opening. Further, by opening the dome 24, it is possible to eliminate the supply of lighting, air conditioning, and the like, thereby saving energy.

In this case, since air is not supplied to the main tube 60 and the sub tube 62, the main tube 60 and the sub tube 62 are contracted, so that the sub tube 62 is not in contact with the lower surface of the upper dome section. In addition, the vertical wall 7
The vertical wall seal 84 and the vertical wall seal 86 are not in contact with each other because 8, 80 are in the separated state.

When the weather is rainy or the like, the supporting carts 30 and 32 supporting the movable dome sections 46 and 48 move along the rails 38 by driving means (not shown). In this movement, the upper movable dome section 46 and the lower movable dome section 48 rotate in opposite directions (arrows A and B in FIG. 4). Due to the rotational movement of the movable dome sections 46, 48, the overlapping portions of the movable dome sections 46, 48 with the fixed dome section 26 gradually decrease.

When each of the movable dome sections 46 and 48 rotates about 120 °, a part of the side edges of the upper movable dome section 46 and the lower movable dome section 48 (from the vicinity of the center of rotation CL to the outer periphery). Side) overlap. As a result, a dome 24 is formed above the spectator seat 14 and the field 16 surrounded by the wall 12 and is closed.

Incidentally, the movable dome section 4
During the rotational movement of 6, 48, the sub tube 62 is not in contact with the lower surface of the upper dome section, so that the seal portion 58 including the sub tube 62 is not damaged. However, in this state, there is a gap (about 60 cm) between the side edges of the dome sections 26, 46, and 48, which causes a reduction in airtightness and a leak of rain.

For this reason, in this embodiment, after the dome 24 is closed by the rotational movement of the movable dome sections 46 and 48, air is supplied to the main tube 60 and the sub tube 62. By supplying this air, the main tube 60
And the sub tube 62 expands, but the main tube 6
Since the guide plate 64 is provided at the portion corresponding to the lower half of the main tube 0, the lateral expansion of the lower half of the main tube 60 is limited.

Therefore, the limited pressure is added to the pressure for expanding the upper half of the main tube 60, and the main tube 60 expands in a vertically long elliptical shape. That is, it expands toward the lower surface of the upper dome section. The expansion of the main tube 60 causes the sub tube 62 to expand.
Abuts against the lower surface of the upper dome section to seal the gap. That is, the gap is sealed by the seal portion 58 having a two-stage structure (Dharma type).

Specifically, an overlapping portion of one side of the fixed dome section 26 and one side of the lower movable dome section 48, and a rib 52 provided on the other side of the fixed dome section 26 The overlapping portion of the upper end with one side of the upper movable dome section 46, the other side of the lower movable dome section 48, and the side of the upper movable dome section 46 are sealed by the seal portion 58. You.

As described above, in this embodiment, the lower half of the main tube 60 is restricted by the guide plate 64 so as to expand into a vertically long elliptical shape. Therefore, when the main tube 60 is expanded without any restriction ( A predetermined height dimension can be obtained with an air supply amount smaller than that of a section perpendicular to the axis (circular). Therefore, the air supply time can be shortened, and the working efficiency can be improved.

Further, the seal portion 58 is not a single tube but a two-stage structure (the main tube 60 and the sub tube 6).
(Dharma type where 2 is overlapped), so that the time for the sealing operation can be further reduced.

The overlapping portions of the dome sections can be reliably sealed by the sealing portion 58, but the movable dome sections 46, 48
Since there is a gap also in the rotation center portion, it is necessary to seal this gap in the rotation center portion. Further, since each dome section has a thickness, it is necessary to seal the vertical wall portions 78 and 80 which approach and separate according to opening and closing of the dome 24.

For this reason, in the present embodiment, the main tube 60 and the sub tube 62 are routed so that the arc-shaped seal portion 7 surrounds the shock absorbers 54 and 56.
6 as well as vertical wall tubes 84 and 86 on the vertical wall portions 78 and 80, respectively (see FIG. 7).

Thus, the shock absorbers 54, 5
The seal around the six turns becomes complete, so that airtightness can be maintained and rain leakage can be prevented.

On the other hand, sheets 100 and 112 are provided on the arc-shaped periphery of the movable dome sections 46 and 48, respectively.
The lower end portions are in contact with the concave portions 96 and 110, respectively.
04 is in contact. Therefore, airtightness is maintained even at the arc-shaped peripheral edges of the movable dome sections 46 and 48.

The lightning arresters 104 and 116 are grounded by a conducting means (not shown) and also have a role as a lightning arrester, and lightning is guided to a grounded portion.

Further, between the movable dome sections 46 and 48 and the wall 12, brushes 118 and 120 and airtight sheets 122 and 124 entangled with each other in a closed state.
Is provided, almost no rain or the like invading through the grooves 20, 22 due to the entanglement of the brushes 118, 120 can be suppressed, and the airtight sheets 122, 124 made of vinyl can completely maintain airtightness.

Since the fixed dome section 26 does not move, its periphery is securely sealed (not shown). Thereby, the fixed dome section 2
6. All the gaps between the movable dome sections 46 and 48 can be sealed, the airtightness is good, and the rain can be prevented.

Further, the movable dome section 4 of this embodiment
The rotation centers of 6, 48 are shock absorbers 54, 5,
Even if each dome section swings in an emergency such as an earthquake or a strong wind, the swinging can be alleviated and there is no problem that the dome sections come into contact with each other.

[0086]

As described above, the seal structure of the opening / closing dome according to the present invention expands the tube in an efficient shape and supplies the tube into the tube when the gap of the dome section is sealed by expansion of the tube. This has an excellent effect that the amount of air to be reduced can be reduced and inflated in a short time, thereby improving the working efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dome stadium with an open dome.

FIG. 2 is a plan view showing the dome of the dome stadium in a closed state and indicated by imaginary lines.

FIG. 3 is a sectional view taken along line III-III of FIG. 2 when the dome is closed.

FIG. 4 is a plan view when the dome is closed.

FIG. 5 is a side view showing only the skeleton of the dome rotation center when the dome is opened.

6A is a sectional view taken along line VI-VI in FIG. 4, and FIG. 6B is a perspective view of a seal portion.

FIG. 7 is a perspective view showing a layout state of a seal portion.

8A is a plan view of the center of rotation of the dome section showing the closed dome by imaginary lines, and FIG. 8B shows the open / closed state of only the fixed dome section and the lower dome section. FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 7;

FIG. 10 is an enlarged view of FIG. 3 showing a cross section of the uppermost part of the wall body.

FIG. 11 is a perspective view illustrating a moving state of a sheet provided on an arc-shaped peripheral edge of the movable dome section.

FIG. 12 is an enlarged view of FIG. 3 showing a cross section of an intermediate portion of a wall body.

FIG. 13 is a sectional view taken along line XIII-XIII of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dome stadium 12 Wall 24 Dome 26 Fixed dome section 46 Movable dome section 48 Movable dome section 58 Seal part 60 Main tube 62 Sub tube 64 Guide plate (guide member) 76 Arc-shaped seal part 82 Vertical wall seal part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kozo Fukao 2-5-1-14 Minamisuna, Koto-ku, Tokyo Inside the Technical Research Institute Takenaka Corporation (72) Inventor Eisaku Kakita 4 Tenjin, Chuo-ku, Fukuoka City, Fukuoka Prefecture No. 2-20 Takenaka Corporation Kyushu Branch (56) References JP-A-59-15146 (JP, A) JP-A-3-115637 (JP, A) JP-A-3-147948 (JP, A) JP-A-3-93936 (JP, A) JP-A-62-90459 (JP, A) JP-A-5-295841 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 7/16-7/18 E04B 1/68-1/686

Claims (3)

(57) [Claims] 1. A dome constituting a ceiling portion of a field is divided into a plurality of dome sections, and each dome section is used as an open / close dome which relatively moves so as to overlap with each other so as to open and close. A seal structure of an opening / closing dome for sealing a gap between each dome section, wherein the main tube is mounted on the upper surface of the lower dome section and expanded by gas supply, and is mounted on an upper end of the main tube and communicates with the main tube. A sub-tube that contacts the lower surface of the upper dome section when inflated, and a guide member that guides the expansion direction of the main tube toward the upper dome section,
Seal structure of opening and closing dome having 2. A fixed dome section in which the dome section is supported and fixed to an upper part of a wall surrounding the field, and a dome section connected to and supported by a rail part formed in an arc shape on the upper part of the wall to be connected to the rail part. And a movable dome section rotatable along the dome section. The main tube and the sub tube are arranged around the center of rotation on the upper surface on the lower side of each dome section overlapping each other. The seal structure for an opening / closing dome according to claim 1. 3. A pair of tubes branching from the main tube and the sub tube are provided independently of each other on a vertical wall portion which is approached and separated according to opening and closing of each of the dome sections. The seal structure for an open / close dome according to claim 1, wherein the pair of tubes contact each other in a closed state to seal a gap between the vertical wall portions.