How to erect an air beam structure

Abstract

To allow an air beam structure, which is used for setting up a substantially-hogbacked tent and in a state of being filled with no air, to be set up even by a few people.SOLUTION: Basic air beam structures X1 to X3 to be set up have three arched main beams 100 that are disposed in parallel. Adjacent main beams are connected to each other by a linear horizontal sub-beam 200. The basic air beam structures X2, X3 that are not located at a specific position as a set-up place are carried to a position of the basic air beam structure X1 located at the specific position. These basic air beam structures are integrated by abutting the main beams 100 on the respective ends of the basic air beam structures to each other.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a method for erecting an air beam structure. [Background technology]

[0002] Air beam structures are known. An air beam structure is a membrane structure that uses as beams bags made of membrane material that are airtight and can be strengthened by filling the inside with air. In this application, the term "beam" does not only mean something that extends horizontally, but is used to mean something that provides strength to a structure. For example, in this application, the term "beam" includes not only beams and girders that the term "beam" normally means, but also columns that extend in other directions such as vertically, and also curved shapes such as arch shapes (shapes in which two or more straight lines are continuously connected, or curved shapes, such as circular arc shapes). In this application, only the part of the final structure that corresponds to the aggregate in a general structure for giving the structure strength is defined as an air beam structure. Such air beam structures are generally used to build tents that use the air beam structure as an aggregate. For example, a tent is built by covering the entire air beam structure with a membrane material.

[0003] Air beam structures, or tents that use them, use membrane material to form them, which allows for beautiful curves to be achieved. In addition, they have the advantage that they can be set up and taken down relatively easily and in a short amount of time compared to normal structures. For example, they are used in arches used in school festivals and pavilions at world expos. In addition, it has been proposed to use tents that utilize air beam structures as temporary tents in emergencies such as natural disasters, which have become more frequent in recent years.

[0004] Among air beam structures, there are those that have at least two arch-shaped main beams arranged in parallel and sub-beams connecting adjacent main beams. Such air beam structures can be used to make tents in a roughly kamaboko (spiral-shaped) shape, and their simple shape has a wide range of applications. As will be the case below, the term "approximately kamaboko-shaped" in this application also includes cases where the cross section of the air beam structure parallel to the inner plane of the arch made by the main beams included in the air beam structure is not the same size or shape at any part in the longitudinal direction of the air beam structure (direction perpendicular to the plane made by the above-mentioned arch of the main beams). For example, even if the arch of the main beam at one end in the longitudinal direction of the air beam structure is small and the arch of the main beam at the other end is gradually larger (approximately shell-shaped like a bivalve shell), or if the arches of the main beams at one end and the other end in the longitudinal direction of the air beam structure are small and the arch of the main beam at the center in the longitudinal direction is large (approximately dome-shaped), this does not prevent the air beam structure from being "approximately kamaboko-shaped". Summary of the Invention [Problem to be solved by the invention]

[0005] However, there is still room for improvement in the air beam structure used to make the generally semi-cylindrical tent. As described above, the air beam structure is composed of a combination of an arch-shaped main beam and a straight sub-beam. The width of the air beam structure is determined by the distance between the lowest ends of at least two main beams arranged in parallel when viewed from above, and the depth is determined by the distance between both ends of the at least two main beams. The size of the air beam structure depends on the application, but it is expected that at least one of the width and depth will exceed 15m, and the height will also exceed 7m. In other words, air beam structures can be large. When erecting such a large air beam structure, problems may occur. When erecting an air beam structure, the air beam structure is spread out in the area where the air beam structure is to be erected, with the air not being filled in the above-mentioned bag, and the air is filled in the above-mentioned bag by a blower. The air beam structure then stands up and is erected. However, there are cases where heavy machinery cannot be used at the site where the air beam structure is to be erected for some reason, or where the number of workers available for erecting the air beam structure is small. In such cases, erecting a large air beam structure may be difficult. This problem becomes even more evident when attempting to build an air beam structure larger than the examples given above.

[0006] An object of the present invention is to provide a technique that enables an air beam structure used to create a roughly semi-cylindrical tents to be erected by a small number of people and with as little heavy machinery as possible. [Means for solving the problem]

[0007] In order to solve these problems, the inventors of the present application propose the following invention. The present invention is a method for erecting an air beam structure comprising a basic air beam structure having at least two main beams which are arranged parallel to one another in a plan view and which become arched when the main air chamber is filled with air, and which have a main bag made of a membrane material that defines a main air chamber which can be filled with air, and which are configured to maintain their intended shape by filling the main air chamber with air, and a plurality of sub-beams which are beams which connect adjacent main beams and become straight when the sub-air chamber is filled with air, and which have a sub-bag made of a membrane material that defines a sub-air chamber which can be filled with air, and which are configured to maintain their intended shape by filling the sub-air chamber with air. The air beam structure erected by the air beam structure erection method of the present invention is formed by combining multiple basic air beam structures. The basic air beam structure has at least two main beams and multiple sub-beams connecting adjacent main beams. In other words, the basic air beam structure of the present invention corresponds to the air beam structure described in the Background Art section. The air beam structure erection method of the present invention is to erect a larger air beam structure by combining multiple basic air beam structures in conventional air beam structures. The method for erecting an air beam structure in the present invention includes a first step of arranging one basic air beam structure, which has been given a predetermined shape by filling the main air chamber and the sub-air chamber with air, at a specific position where the air beam structure is to be erected; a second step of moving another basic air beam structure, which has been given a predetermined shape by filling the main air chamber and the sub-air chamber with air at a position other than the specific position, to the specific position; and a third step of abutting one of the main beams included in the one basic air beam structure, which is located at an end, with one of the main beams included in the other basic air beam structure, which is located at an end, to integrate the one basic air beam structure and the other basic air beam structure at the specific position.

[0008] In other words, the method for erecting an air beam structure in the present invention includes the first to third steps. The first step is to place a basic air beam structure in a predetermined shape at a specific location where the air beam structure is to be erected. The basic air beam structure may be shaped into the predetermined shape by filling the main air chamber and the sub air chamber with air at the specific location, or may be shaped into the predetermined shape at a location other than the specific location and then moved to the specific location. However, the former method is usually adopted. The second step is to move another basic air beam structure, which has been formed into a predetermined shape at a position other than the specific position, to the specific position. The other basic air beam structure, unlike the one basic air beam structure, is formed into a predetermined shape by filling the main air chamber and the sub air chamber with air at a position other than the specific position, and then is moved to the specific position. The third step is to abut the main beams of one basic air beam structure and another basic air beam structure, both of which are located at specific positions, at a specific position, thereby integrating the one basic air beam structure with the other basic air beam structure. Specifically, the main beams located at the ends of the one basic air beam structure are abutted with the main beams located at the ends of the other basic air beam structure. For this to be possible, the main beams included in one air beam structure that are to be abutted with the main beams of the other air beam structure must naturally have a shape and size that allow such abutment. It is preferable that the two main beams contact each other not at a point, but at a line along the length of both beams. This reduces the risk of rainwater entering between the two main beams. In addition, the two main beams that make line contact are well integrated, making them more resistant to shaking. According to the air beam structure construction method including the above-mentioned steps 1 to 3, a larger completed air beam structure can be obtained by constructing a plurality of basic air beam structures at a specific location or at a different location and then combining them. If the size of each basic air beam structure is kept within an appropriate range, the number of workers required to construct each basic air beam structure can be reduced, and it is also possible to construct the basic air beam structures without using heavy machinery. However, the method of the present invention requires a second process of moving the basic air beam structure and a third process of integrating the basic air beam structure with other basic air beam structures. The method of the present invention allows for an increase in the time required to set up the air beam structure due to such circumstances, and prioritizes reducing the number of personnel involved in setting up the air beam structure and not using heavy machinery. The number of the other basic air beam structures may be one or more. In other words, the number of the other basic air beam structures may be more than one.

[0009] As described above, in the second step of the air beam structure erection method of the present invention, another basic air beam structure that has been formed into a predetermined shape at a position other than the specific position is moved to the specific position. Any method of such movement may be used, but for example, the following method may be used. For example, in the second step, a predetermined position of the other basic air beam structure having a predetermined shape can be jacked up by a jack placed on a wheeled cart, and the cart can be moved to the specific position, thereby moving the other basic air beam structure. It is relatively easy to move other basic air beam structures that are entirely suspended by a dolly. Of course, there can be multiple jack-up locations, and this is rather common. In the second step, the lower end of the sub-beam or the main beam of the other basic air beam structure may be jacked up by the jack. When the sub-beam is substantially horizontal, the sub-beam is suitable as a place to perform jacking up. The lower end (e.g., the lower surface) of the main beam may also be considered as a place to perform jacking up.

[0010] When moving other basic air beam structures using a cart with a jack, it is also possible to use an air jack as the jack, which has an air bag that expands when filled with air by a blower used to fill the main air chamber and sub air chamber of the basic air beam structure with air. At the site where the air beam structure is erected, there is already a blower for sending air to the main air chamber of the main beam and the sub air chamber of the sub beam. By using this as a power source for driving the jack, there is no need to prepare a new power source, which leads to a reduction in costs required when carrying out the air beam structure erection method of the present invention. When the jack installed on the cart is an air jack, the air bags can be stacked vertically. This allows each layer of the air jack to be made thinner, so that the height of each layer can be adjusted while keeping it stable, making it easier to level the entire air bag. In this case, for example, air can be supplied to each of the stacked air bags from a pipe branched off from a pipe extending from a single blower. This is economical because it reduces the number of blowers required.

[0011] As described above, in the third step, at a specific position, the main beams of one basic air beam structure and another basic air beam structure, both of which are at specific positions, are abutted against each other, thereby integrating the one basic air beam structure and the other basic air beam structure. In the method for erecting an air beam structure according to the present invention, the second main beam, which is the main beam of the other basic air beam structure that is to be brought into contact with the main beam included in the one basic air beam structure, can be made one size larger than the first main beam, which is the main beam of the one basic air beam structure that is to be brought into contact with the main beam included in the other basic air beam structure. In the third step, the axial center of the second main beam (top of the second main beam) can be made to pass over the axial center of the first main beam (top of the first main beam). By making the first main beam and the second main beam have a positional relationship that satisfies the above-mentioned relationship, for example, by jacking down the other basic air beam structure at a position where such a positional relationship is generated, when a force acts to move the other basic air beam structure having the second main beam away from the one basic air beam structure, the second main beam is engaged with the first main beam, so that it is possible to prevent the other basic air beam structure from being separated from the one basic air beam structure. In other words, one basic air beam structure can be well integrated with another basic air beam structure. In this case, it is preferable that the first main beam and the second main beam are in line contact at least within a certain range in their length direction. It is even more preferable that they are in line contact over their entire length. This allows one basic air beam structure to be well integrated with another basic air beam structure. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a side view of a basic air beam structure constituting an air beam structure in one embodiment. [Diagram 2] FIG. 2 is a plan view of the basic air beam structure shown in FIG. 1. [Diagram 3] FIG. 2 is a front view of the basic air beam structure shown in FIG. 1. [Figure 4]Cross-section of the basic air beam structure shown in Figure 1 taken along a plane perpendicular to the length of the main beam. [Diagram 5] FIG. 1 is a side view showing the basic air beam structure before assembly. [Figure 6] FIG. 1 is a perspective view of a dolly used to move the basic air beam structure. [Figure 7] FIG. 7 is a front view of the dolly shown in FIG. 6 for explaining the operation of the air jack. [Figure 8] 7 is a diagram for conceptually explaining a mode of use of an air jack in the dolly shown in FIG. 6. [Figure 9] 7 is a diagram for explaining a method of using the dolly shown in FIG. 6. [Figure 10] FIG. 13 is a side view for explaining a method of assembling a basic air beam structure. [Figure 11] FIG. 11 is another side view illustrating a method of assembling the basic air beam structure. [Figure 12] FIG. 12 is an enlarged cross-sectional view of the dashed line portion in FIG. [Figure 13] FIG. 2 is a side view of a completed air beam structure obtained by assembling basic air beam structures. [Figure 14] FIG. 13 is a diagram for explaining the use of another carriage used to move the basic air beam structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0014] The following describes how to erect the air beam structure that will be the framework for the temporary tent. The term "temporary" means that it is not intended to be used for a permanent period, such as decades. Generally, temporary tents are used for only a few years at most, and although this is not a limitation, in many cases, temporary tents are used for only a few weeks to a few months, or at most a year. In this embodiment, a method for erecting an air beam structure is described. Once erected, the air beam structure can be covered with other large membrane materials or the membrane materials can be stretched between aggregates to form a temporary tent.

[0015] As described later, the air beam structure in this embodiment is constructed by combining a plurality of basic air beam structures. Each basic air beam structure may have the same structure as a conventionally known or well-known air beam structure. The basic air beam structure X will now be described. Figures 1 to 3 are a side view, a plan view, and a front view of an example of the basic air beam structure X, respectively.

[0016] The air beam structure erected by the erection method of this embodiment is a frame for a temporary tent having a roughly semi-cylindrical shape. Each basic air beam structure X is responsible for a part of the length of the air beam structure. The basic air beam structure X includes a main beam 100 having an arch-like shape when viewed from the front (for example, when viewed from the left in FIG. 1). The arch formed by the main beam 100 does not need to be curved (but is not limited to this, in this embodiment, it is an arc-like shape) as in this embodiment, and may be formed by connecting two or more straight lines. There are at least two main beams 100, and in this embodiment, there are three. The main beams 100 are in a parallel positional relationship when viewed in a plane, and are independent in a state in which adjacent sub-beams described later are connected to each other. At least two main beams 100 are required for the main beam 100 to be able to stand on its own, but there may be three main beams 100 as in this embodiment, or more. Although not limited thereto, the main beams 100 in this embodiment have the same size and shape, and except for the connection parts with the sub-beams, all of them have the same configuration. Although not limited thereto, the main beams 100 in this embodiment are positioned so that the two rearmost beams overlap the frontmost main beam 100 when viewed from the front. As shown in the basic air beam structure X3 on the right side of Fig. 5, the main beams 100 do not necessarily have to be of the same size and shape. A tent made using an air beam structure including such a basic air beam structure X3 has a non-uniform cross-sectional shape in the longitudinal direction of the air beam structure, but is a "shell-shaped" tent as referred to in this application, and is one embodiment of a "fish-shaped" tent.

[0017] A cross section of the main beam 100 is shown in Fig. 4. The cross section of the main beam 100 is basically as shown in Fig. 4, except for the lower end and the portion where the connection port is present. The main beam 100 has a substantially circular cross section when the basic air beam structure X is set up. The main beam 100 includes an outer membrane material 110 on the outside and an inner membrane material 120 on the inside of the outer membrane material 110. Both the outer membrane material 110 and the inner membrane material 120 are made of membrane material. The inner membrane material 120 is a membrane material that divides the main air chamber. A membrane material capable of forming the main air chamber airtight is selected as the material of the inner membrane material 120. Although it is preferable that the airtightness required for the main air chamber is perfect, it may be sufficient if it is practically airtight. In the present application, the main air chamber may be airtight if the basic air beam structure X is airtight enough to maintain its shape by appropriately filling the air with a blower as necessary as described later for the basic air beam structure X after construction. The inner membrane material 120 is, for example, a film made of resin or a membrane material in which a fibrous fabric or the like is coated with resin or the like. Resins that are materials for the film or membrane include PU (polyurethane), PE (polyethylene), PVC (polyvinyl chloride), hypalon rubber, etc. The thickness of the inner membrane material 120 is 50 to 500 μm, and is generally selected from the range of 100 to 300 μm. The outer membrane material 110 is a membrane material that has both the function of forming the inner membrane material 120 into a predetermined shape and the function of protecting the inner membrane material 120. The outer membrane material 110 is configured to have a shape as shown in Figs. 1 to 3. The main beam 100 made of the outer membrane material 110 is tubular, in this embodiment, cylindrical, following a known or well-known manufacturing method for conventional products of the same type. The outer membrane material 110 is configured to have the above-mentioned shape after being cut using a three-dimensional cutting technique in order to form a three-dimensional shape. Note that the outer membrane material 110 is not required to be airtight. Therefore, both ends of the main beam 100 may be open. The outer membrane material 110 is, for example, a film made of resin or the like, or a membrane material in which a fibrous fabric or the like is coated with resin or the like. Resins that are materials for the film and membrane material include PU (polyurethane), PE (polyethylene), PVC (polyvinyl chloride), hypalon rubber, etc. The thickness of the outer membrane material 130 is 300 to 1000 μm, and is generally selected from the range of 500 to 700 μm.

[0018] The above-mentioned inner membrane material 120 in the main beam 100 is used to make a main bag (not shown). The main bag is a cylindrical bag with both ends closed, with a length corresponding to the length of the main beam 100. Its diameter is slightly larger than the diameter of the cylinder formed by the outer membrane material 110, and its length is longer than that of the outer membrane material 110. The space inside the main bag is the main air chamber. The main bag is arranged in the main beam 100 so as to span the entire length of the space formed by the cylindrical outer membrane material 110. In this embodiment, the main bag is arranged to span the entire length of the main beam 100, and the main beam 100 has only one main air chamber defined by one main bag, but it is also possible to divide the main bag into several parts in the length direction of the main beam 100, so that the main beam 100 has multiple main air chambers. The main bag is formed into a cylindrical shape using the inner membrane material 120 according to a known or well-known manufacturing method of a conventional product of the same kind. When the main bags are alone, the shape of the main bags when air is filled into them may be curved along the shape of the main beam 100 shown in Figs. 1 to 3, 5, etc. However, although not limited to this, in this embodiment, when the main bags are alone, the shape of the main bags when air is filled into them is linear. As already mentioned, the main bags need to be airtight to a certain degree, and if the shape of the main bags is complicated, it is difficult to make the main bags airtight. In this embodiment, the main bags are made to have a simple cylindrical shape, so that the manufacture of the main bags having a certain degree of airtightness can be made as easily as possible. On the other hand, when air is filled into the main bag, the shape of the main bag is forcibly deformed into an arch shape along the main beam 100 by the tube formed by the outer membrane material 110. The diameter of the main bag may be larger than that of the bag made of the outer membrane material 110, and when the main bag is inflated by filling it with air as described below, the outer surface of the main bag is pressed against the inner surface of the bag made of the outer membrane material 110, for example in a wrinkled state. The same is true for the sub-beam 200. In this way, the main bag made of the inner membrane material 120 has the function of making the main air chamber airtight, while the so-called side of the cylindrical shape made of the outer membrane material 110 has the function of adjusting the shape of the main bag when air is put in and protecting the main bag, which are different functions from those given to the main bag. If there is no need to assign such different functions to the inner membrane material 120 and the outer membrane material 110, it is also possible to omit the outer membrane material 110 and make up the main beam 100 only with the inner membrane material 120. The same is true for the sub-beam 200.

[0019] Each main beam 100 also has a connection port 131. The connection port 131 is an opening that can be opened and closed freely and communicates with the main air chamber, which is the space inside the main bag. Although not limited to this, each main beam 100 in this embodiment has at least one connection port 131, and although not limited to this, in this embodiment, each main beam 100 is provided with a total of two connection ports 131, one near each of its lower ends. The connection port 131 is exposed to the outside of the main beam 100, in other words, it is exposed to the outside from the outer membrane material 110. In other words, an opening corresponding to the connection port 131 exists in that part of the outer membrane material 110. Although not limited thereto, all of the connection ports 131 in this embodiment are the same and are made of, for example, but not limited to, resin or metal. Connection port 131 is designed to be detachably connected in a generally airtight state to the end of a tube extending from a blower, which will be described later. Components that can perform such a connection are publicly known or well-known, so connection port 131 may be configured according to the publicly known or well-known technology.

[0020] Next, the configuration of the sub-beam 200 will be described. The sub-beam 200 is for connecting adjacent main beams 100 to each other, and is basically approximately horizontal in the basic air beam structure X after erection, with the longitudinal direction of the basic air beam structure X being the front-to-rear direction. However, all the sub-beams 200 do not need to be approximately horizontal, and for example, when adjacent main beams 100 have different sizes, some of the sub-beams 200 often have one end positioned higher than the other end. In the case of an air beam structure having a substantially shell-like or dome-like shape, at least some of the sub-beams 200 are almost always oblique rather than horizontal. The sub-beam 200 is configured with a double structure of an outer membrane material and an inner membrane material (both not shown) like the main beam 100. The materials and roles of the outer membrane material and inner membrane material in the sub-beam 200 are the same as those in the main beam 100. Like the main beam 100, the outer membrane material can be omitted in the sub-beam 200. The sub-beam 200 has a substantially circular cross section when the basic air beam structure X is erected, and the cross section is the same as the cross section of the main beam 100 shown in FIG. As described above, the sub-beams 200 connect adjacent main beams 100. In this embodiment, since there are three main beams 100, there are sub-beams 200 that connect the front main beam 100 and the middle main beam 100, and sub-beams 200 that connect the middle main beam 100 and the rear main beam 100. In this embodiment, although not limited to this, the front main beam 100 and the middle main beam 100 are connected by seven sub-beams 200, and the middle main beam 100 and the rear main beam 100 are also connected by seven sub-beams 200. However, the number of sub-beams 200 that connect the front main beam 100 and the middle main beam 100 and the number of sub-beams 200 that connect the middle main beam 100 and the rear main beam 100 are not limited to this, and may be different from each other. One end of the seven sub-beams 200 is attached to the highest position of the main beam 100 at the center in the length direction. The ends of the other six sub-beams 200 are fixed at positions slightly lower than the highest point of the main beam 100 and even lower than that, and are symmetrical on the left and right sides of the main beam 100 when viewed from the front.

[0021] The outer membrane material constituting the sub-beam 200 is similar to the outer membrane material 110 constituting the main beam 100, and its shape is as shown in Figures 1 to 3, 5, etc. The outer membrane material is cylindrical. The inner membrane material constituting the sub-beam 200 defines an air chamber, similar to the inner membrane material 120 in the main beam 100. That is, similar to the case of the main beam 100, the inner membrane material in the sub-beam 200 is used to make a sub-bag. The space inside the sub-bag is the sub-air chamber. The sub-air chamber is as airtight as the main air chamber in the main beam 100. The sub-bag is a cylindrical or tubular bag with a length corresponding to the length of the sub-beam 200. Its diameter is slightly larger than the diameter of the cylinder formed by the outer membrane material 110 of the sub-beam 200, and its length is longer than the outer membrane material 110. The sub-bag is placed in the space formed by the cylindrical outer membrane material 110 with its length direction aligned. Both ends of the sub-bag in the length direction may be connected to the main bag in such a manner that the main air chamber in the main bag present in the main beam 100 to which the sub-beam 200 including the sub-bag is connected communicates with the sub-air chamber in the sub-bag. On the other hand, the main air chamber formed by the main bag and the sub-air chamber formed by the sub-bag may not communicate with each other in that portion. In the latter case, both ends of the sub-bag are closed. Although not limited thereto, in this embodiment, the sub-air chambers formed by the sub-bags included in each sub-beam 200 are made to communicate with the main air chambers formed by the main bag included in the main beam 100 to which the ends of each sub-beam 200 are connected, and both ends in the longitudinal direction of the sub-bags included in each sub-beam 200 are joined to the main bag in the main beam 100 in a manner that makes this possible. In this embodiment, the main air chambers included in all main beams 100 included in the basic air beam structure X and the sub-air chambers included in all sub-beams 200 form a single air chamber that is all connected to each other. However, how the air chambers are divided can be freely designed. For example, it is possible to make the main air chambers of all main beams 100 independent and not connected to the other air chambers, and to make the sub-air chambers of all sub-beams 200 independent and not connected to the other air chambers.It is also possible to configure only the main air chamber of the foremost main beam 100 and the sub-air chamber of the sub-beam 200 connected to it to be connected to each other, and to make the main air chambers of the other main beams 100 and the sub-air chambers of the other sub-beams 200 independent and not connected to the other air chambers. As described above, in this embodiment, each main beam 100 has two connection ports 131, but in principle, it is sufficient that there is one connection port 131 for each series of air chambers, and an appropriate number of connection ports 131 may be provided at appropriate positions within a range that satisfies the conditions. For example, if the sub-air chamber in the sub-beam 200 is independent, the sub-beam 200 needs to have a connection port that communicates with the sub-air chamber of that sub-beam 200. In other words, there may be cases where the sub-beam 200 is provided with a connection port.

[0022] As described above, the front main beam 100 and the intermediate main beam 100, and the intermediate main beam 100 and the rear main beam 100 are each connected by seven sub beams 200. The lengths of the sub beams 200 connecting the front main beam 100 and the intermediate main beam 100 are all equal, and the lengths of the sub beams 200 connecting the intermediate main beam 100 and the rear main beam 100 are all equal. However, although the lengths of the former sub beams 200 and the latter sub beams 200 are made equal in this embodiment, they do not necessarily have to be made equal.

[0023] The basic air beam structure X described above is formed into a predetermined shape by filling each air chamber with air, as in the case of a conventional air beam structure. By filling each air chamber with air, the main beam 100 and the sub beam 200 have a certain degree of rigidity and form into a predetermined shape. In this embodiment, the basic air beam structure X has one air chamber, and thus the intended shape is achieved by connecting a pipe extending from a blower (not shown) to one of the connection ports 131 on each of the three main beams 100, and filling that one air chamber with air from the blower through the connection port 131. In the case where there are a plurality of air chambers, a pipe extending from a blower is connected to each of the connection ports 131 communicating with each air chamber, and air is filled into each air chamber, so that the basic air beam structure X has a predetermined shape. In this case, air may be filled into each air chamber simultaneously, or it does not have to be filled therewith.

[0024] In this embodiment, an air beam structure is erected by combining a plurality of basic air beam structures X as described above, which are erected in the manner as described above. A method for erecting an air beam structure by combining basic air beam structures X will be described below.

[0025] In this embodiment, an air beam structure is constructed by combining three basic air beam structures X shown in Fig. 5. Of course, Fig. 5 is merely an example, and the number of basic air beam structures X does not have to be three, and the configuration of each basic air beam structure X does not have to be as shown in Fig. 5. Of the three basic air beam structures X, the central basic air beam structure X1 is assumed to be the basic air beam structure X at a specific position where the air beam structure is to be erected. The basic air beam structures X2 and X3 on either side of it are not at the specific position as shown in Fig. 5, and will be moved to the specific positions as described below. The configuration of each basic air beam structure X is basically the same, but in this embodiment, the basic air beam structure X2 located on the left side in FIG. 5 is one size larger than the basic air beam structure X1. In addition, the basic air beam structure X3 located on the right side in Fig. 5 has the same configuration as the basic air beam structure X2 in the portion to the left of the second main beam 100 from the left, but the size of the rightmost main beam 100 is slightly smaller than the rightmost main beam 100 of the basic air beam structure X2. Accordingly, several beams located above the sub-beam 200 located on the right side in Fig. 5 of the basic air beam structure X3 are not exactly horizontal, but are slightly downward to the right in Fig. 5. In this way, it is permitted in this embodiment and in the present invention that the configurations of the main beams 100 included in each basic air beam structure X do not match, and that the configurations of each basic air beam structure X do not match.

[0026] In order to move the basic air beam structures X2 and X3 from a non-specific position to a specific position, in this embodiment, but not limited to, a dolly 300 shown in Figs. 6 and 7 is used. The dolly 300 includes a base plate 310, which is, for example, a metal plate, and casters 311 are provided on the underside of the base plate 310. In this embodiment, although not limited to this, the casters 311 are provided at the four corners of the underside of the rectangular base plate 310. Although not limited to this, each caster 311 is a swivel caster that is rotatable relative to the base plate 310. An air jack 320, which is an example of a jack, for example, an air mat type air jack, is provided on the base plate 310. The air jack 320 has a function of pushing up the basic air beam structure X. Although not limited to this, the air jack 320 in this embodiment has a function of pushing up the sub-beam 200 located at the bottom of the basic air beam structure X. The air jack 320 includes an air bag 321 that is inflated by putting air into it. The material of the air bag 321 can be similar to the material of the inner membrane material 120. Although not limited to this, there are multiple air bags 321 in this embodiment, and although not limited to this, there are three air bags 321 in this embodiment. The number of air bags 321 may be one, but can be up to about 10. The three air bags 321 are stacked vertically, and adjacent ones in the vertical direction are fixed to each other, for example, by adhesive. Around the lowest one of the air bags 321, there are frame plates 322 that rise upward from each side of the base plate 310 and form a rectangular frame in a plan view. The frame plates 322 press the periphery of the lowest air bag 321, or the four sides when viewed in a plan view, so that the air bag 321 is fixed to the base plate 310. Each air bag 321 is provided with at least one connection port 323. The connection port 323 is a connection port for filling the inside of each air bag 321 with air. The above-mentioned pipe (or a pipe branched from this pipe) extending from the above-mentioned blower used for filling the air chamber of the basic air beam structure X with air can be connected to the connection port 323, so that air can be filled from the blower through the connection port 323 into the air bag 321. An example of a connection state between each air bag 321 and a blower 400 is shown in FIG. 8. The blower is designated by the reference number 400 in the figure. The blower 400 may be any type that can send air, and may be a known or well-known type. For example, a maximum air volume of 2.0 to 4.0 m 3 / min, and maximum vacuum degree: about 10 to 35 kPa can be used as the blower 400. A pipe 410 for sending air extends from the blower 400. A manifold 420 for branching the pipe 410 is connected to the tip of the pipe 410, and the pipe 410 is branched into three pipes 430 via the manifold 420. The tip of each pipe 430 is connected to the connection port 323 of each air bag 321. With this structure, air can be sent from one blower 400 to each of the air bags 321 constituting the air jack 320. The blower 400 is used while moving together with the moving cart 300 as described later, but all the equipment for sending air to the air bags 321, such as the blower 400 and the manifold 420, may be mounted on the cart 300.

[0027] A support plate 330, which is, for example, a metal plate, is fixed on the top of the air bags 321 constituting the air jack 320. Although not limited thereto, the support plate 330 is a horizontal plate having a shape and size that exactly overlaps the base plate 310 in a plan view, and moves upward while maintaining a horizontal position as the three air bags 321 constituting the air jack 320 inflate. For example, when air is filled into each of the air bags 321, the support plate 330 changes from the state shown in FIG. 7(A) to the state shown in FIG. 7(B). The range of change may be greater. Of course, when air is released from the air bags 321, the support plate 330 moves downward. On both sides of the width of the support plate 330, there are provided locking members 331 having a cross section of a substantially right-angled triangle. The locking members 331 are intended to prevent the sub-beam 200 placed on the support plate 330 from coming off the support plate 330 as described below. As long as this is possible, the configuration of the locking members 331 is not important, and in some cases they may not even be present. One side of a fixed membrane material 332, which is a rectangular membrane material, is attached to the outer surface of one of the locking members 331. The fixed membrane material 332 is intended to fix the sub-beam 200 to the support plate 330 as described below. The side opposite the one side of the fixed membrane material 332 is designed to be detachably fixed to the outer surface of the other locking member 331. For such releasable fixation, for example, a combination of a hook and loop fastener attached along the opposite side of the one side of the fixed membrane material 332 and a hook and loop fastener capable of releasably fixing to the hook and loop fastener fixed to the outer surface of the other locking member 331 can be used. Of course, other known or well-known methods can be used for the same purpose. Also, the fixed membrane material 332 does not have to be present.

[0028] Using the dolly 300 as described above, the basic air beam structure X2 is transported to a specific location where the basic air beam structure X1 is located. The basic air beam structure X1 at the specific position may have its shape adjusted to a predetermined shape by filling the air chamber with air at the specific position, or may have its shape adjusted to a predetermined shape at a position other than the specific position and then be moved from a position other than the specific position to the specific position, for example, in a manner similar to that of the basic air beam structure X2 described below. Also, in FIG. 5, the basic air beam structure X3 is assumed to have a predetermined shape before the basic air beam structure X2 is moved. However, in this embodiment, the basic air beam structure X3, which is moved from a position other than a specific position to a specific position after the basic air beam structure X2, does not need to have a predetermined shape before the movement of the basic air beam structure X2, since it is sufficient for the basic air beam structure X3 to have a predetermined shape by filling the air chamber with air at some point before the basic air beam structure X3 is moved.

[0029] When the basic air beam structure X2 is transported using the dolly 300, the dolly 300 is placed under a predetermined sub-beam 200 of the basic air beam structure X2, in this embodiment, but not limited to, the two sub-beams 200 located at the lowest position. In order to stably jack up the basic air beam structure X2 using the air jack 320 provided on the dolly 300, it is preferable to place at least two dollies 300 under one sub-beam 200. Once the cart 300 is positioned under the sub-beam 200 (see FIG. 9), the sub-beam 200 is placed between the two locking members 331 on the support plate 330 of the cart 300, and a fixed membrane material 332 is placed across the sub-beam 200. One side of the fixed membrane material 332 is fixed to the outside of one locking member 331, and the opposite side of the fixed membrane material 332 is fixed to the outside of the other locking member 331. This results in the sub-beam 200 being fixed onto the support plate 330. In this state, air is supplied from the blower 400 to the three air bags 321 constituting the air jack 320 through the pipe 410, the manifold 420, and the pipe 430. Then, the air bags 321 are inflated, and the sub-beam 200 fixed on the support plate 330 is jacked up, and as a result, the basic air beam structure X2 is jacked up as a whole and floats off the ground. Although not limited to this, in this embodiment, the basic air beam structure X2 is jacked up at least to a position where the underside of the top of the main beam 100 located at the rightmost position in FIG. 5 of the basic air beam structure X2 is higher than the top of the main beam 100 located at the leftmost position of the basic air beam structure X1. Then, the basic air beam structure X2 in a jacked-up state is moved together with the carriage 300 from a position other than the specific position to the specific position (FIG. 10). Note that the carriage 300 is not shown in FIG. In the above example, when the basic air beam structure X2 is jacked up, the sub-beam 200 of the basic air beam structure X2 is selected as the position to be jacked up by the air jack 320 mounted on the cart 300. Instead of this, for example, as shown in FIG. 14, an appropriate one of the two lower ends of each main beam 100 can be selected as the position to be jacked up. In this case, the support plate 330 of the cart 300 is in a cranked state in a side view as shown in FIG. 14. The horizontal plate located on the lower side of the support plate 330 (the horizontal plate located next to the base plate 310 in FIG. 14) is in a floating state above the ground as shown in FIG. 14 when the air jack 320 is filled with air and jacked up, and is in a contact state with the ground when jacked down. By placing the underside of the main beam 100 on the horizontal position below the jacked-down support plate 330 and filling the air jack 320 with air and jacking it up, it is possible to jack up the entire basic air beam structure X2.

[0030] When the basic air beam structure X2 is moved to a specific position, the air is released from the air jacks 320 of the dolly 300 to jack down the basic air beam structure X2, and the basic air beam structure X2 is combined and integrated with the basic air beam structure X1 located at the specific position. The integration is performed by abutting the main beams 100 against each other (FIG. 11). In this embodiment, the main beam 100 located at the rightmost side in Figure 5 of the basic air beam structure X2 (referred to as the second main beam in this application; in the following description, for simplicity, it may be referred to as the "second main beam 100B") is abutted against the main beam 100 located at the leftmost side in Figure 5 of the basic air beam structure X1 (referred to as the first main beam in this application; in the following description, for simplicity, it may be referred to as the "first main beam 100A"). In this embodiment, as shown in Figures 11 and 12(A), the second main beam 100B is made to exceed the first main beam 100A, and then the basic air beam structure X2 is jacked down and lowered to the ground. Figures 12(A) to (C) are enlarged cross-sectional views of the part α surrounded by the dashed line in Figure 11. As described above, in this embodiment, the basic air beam structure X2 is jacked up to a height where the underside of the top of the second main beam 100B is located above the upper surface of the top of the first main beam 100A, so it is easy to make the second main beam 100B surpass the first main beam 100A. In this state, even if a force acts on the second main beam 100B or the basic air beam structure X2 to the left in Fig. 11 and Fig. 12(A), the second main beam 100B is locked to the first main beam 100A, so the basic air beam structure X2 is prevented from separating from the basic air beam structure X1. In other words, by doing so, the first main beam 100A and the second main beam 100B, in other words, the basic air beam structure X1 and the basic air beam structure X2 are well integrated. However, the manner in which the first main beam 100A and the second main beam 100B are brought into contact with each other is not limited to the manner shown in FIG. 12(A). There may also be a manner in which the second main beam 100B is placed on top of the first main beam 100A, as shown in FIG. 12(B). Also, there may be an embodiment in which the surface of the first main beam 100A on the side of the basic air beam structure X2 and the surface of the second main beam 100 on the side of the basic air beam structure X1 are brought into contact with each other (see FIG. 12(C)). Regardless of which of the three cases in which the first main beam 100A and the second main beam 100B are in contact with each other, in this embodiment, the first main beam 100A and the second main beam 100B are in line contact rather than point contact, and more preferably, the first main beam 100A and the second main beam 100B are in contact with each other over their entire length. The first main beam 100A and the second main beam 100B are designed to satisfy such a relationship.

[0031] Similarly, the basic air beam structure X3 is moved to a specific position using a dolly 300, and then jacked down to be integrated with the basic air beam structure X1 (FIG. 13). As a result, the basic air beam structure X1, the basic air beam structure X2, and the basic air beam structure X3 are integrated together, completing the air beam structure X. Once the air beam structure X is completed, it can be covered with a membrane material to complete the temporary tent. The configuration of the membrane material covering the air beam structure X and the method of covering the air beam structure X with the membrane material can follow the conventional techniques. In addition, the timing of covering the air beam structure X with the membrane material can be before the basic air beam structures X1 to X3 are completed, for example, before at least one of the main beam 100 and the sub beam 200 is filled with air, by covering each of the basic air beam structures X1 to X3 with the membrane material that will cover the temporary tent. [Explanation of symbols]

[0032] 100 Main Beam 100A 1st main beam 100B 2nd main beam 110 Outer membrane material 120 Intimal material 131 Connection port 200 Sub Beam 300 Carts 310 Base plate 320 Air Jack 321 Air Bag 330 Support plate 331 Locking member

Claims

1. The bag is provided with a main bag made of a membrane material that divides a main air chamber, which is an air chamber that can be filled with air, and the main air chamber is configured to maintain a predetermined shape by filling the main air chamber with air. At least two main beams are arranged parallel to each other in a plan view and are arched when the main air chamber is filled with air. a sub-bag made of a membrane material that divides a sub-air chamber, which is an air chamber that can be filled with air, and a predetermined shape is maintained by filling the sub-air chamber with air; and a plurality of sub-beams that connect adjacent main beams and become straight when the sub-air chamber is filled with air; A basic air beam structure having the above structure, and a method for erecting an air beam structure comprising a combination of a plurality of air beam structures, a first step of placing a basic air beam structure having a predetermined shape by filling the main air chamber and the sub air chamber with air at a specific position where the air beam structure is to be erected; a second step of moving another basic air beam structure, which has been shaped into a predetermined shape by filling the main air chamber and the sub air chamber with air at a position other than the specific position, to the specific position; a third step of abutting one of the main beams included in the one basic air beam structure located at an end with one of the main beams included in the other basic air beam structure located at an end to integrate the one basic air beam structure with the other basic air beam structure at the specific position; A method for erecting an air beam structure, comprising:

2. The main beam included in the one basic air beam structure and the main beam included in the other basic air beam structure that are in contact with each other are brought into line contact. A method for erecting the air beam structure according to claim 1.

3. The main beam included in the one basic air beam structure and the main beam included in the other basic air beam structure that abut against each other are brought into line contact over their entire length in the longitudinal direction. A method for erecting the air beam structure according to claim 1.

4. The bag is provided with a main bag made of a membrane material that divides a main air chamber, which is an air chamber that can be filled with air, and the main air chamber is configured to maintain a predetermined shape by filling the main air chamber with air. At least two main beams are arranged parallel to each other in a plan view and are arched when the main air chamber is filled with air. a sub-bag made of a membrane material that divides a sub-air chamber, which is an air chamber that can be filled with air, and a predetermined shape is maintained by filling the sub-air chamber with air; and a plurality of sub-beams that connect adjacent main beams and become straight when the sub-air chamber is filled with air; A basic air beam structure having the above structure, and a method for erecting an air beam structure comprising a combination of a plurality of air beam structures, a first step of placing a basic air beam structure having a predetermined shape by filling the main air chamber and the sub air chamber with air at a specific position where the air beam structure is to be erected; a second step of moving another basic air beam structure, which has been shaped into a predetermined shape by filling the main air chamber and the sub air chamber with air at a position other than the specific position, to the specific position; a third step of abutting one of the main beams included in the one basic air beam structure located at an end with one of the main beams included in the other basic air beam structure located at an end to integrate the one basic air beam structure with the other basic air beam structure at the specific position; Including, In the second step, a predetermined position of the other basic air beam structure having a predetermined shape is jacked up by a jack arranged on a dolly having wheels, and the dolly is moved to move the other basic air beam structure to the specific position. How to erect an air beam structure.

5. In the second step, a lower end of the sub-beam or the main beam of the other basic air beam structure is jacked up by the jack. A method for erecting an air beam structure according to claim 4.

6. As the jack, an air jack having an air bag that is inflated by being filled with air by a blower used for filling the main air chamber and the sub air chamber of the basic air beam structure with air is used. A method for erecting an air beam structure according to claim 4 or 5.

7. The air bag is a plurality of air bags stacked in the vertical direction. A method for erecting an air beam structure according to claim 6.

8. The bag is provided with a main bag made of a membrane material that divides a main air chamber, which is an air chamber that can be filled with air, and the main air chamber is configured to maintain a predetermined shape by filling the main air chamber with air. At least two main beams are arranged parallel to each other in a plan view and are arched when the main air chamber is filled with air. a sub-bag made of a membrane material that divides a sub-air chamber, which is an air chamber that can be filled with air, and a predetermined shape is maintained by filling the sub-air chamber with air; and a plurality of sub-beams that connect adjacent main beams and become straight when the sub-air chamber is filled with air; A basic air beam structure having the above structure, and a method for erecting an air beam structure comprising a combination of a plurality of air beam structures, a first step of placing a basic air beam structure having a predetermined shape by filling the main air chamber and the sub air chamber with air at a specific position where the air beam structure is to be erected; a second step of moving another basic air beam structure, which has been shaped into a predetermined shape by filling the main air chamber and the sub air chamber with air at a position other than the specific position, to the specific position; a third step of abutting one of the main beams included in the one basic air beam structure located at an end with one of the main beams included in the other basic air beam structure located at an end to integrate the one basic air beam structure with the other basic air beam structure at the specific position; Including, a second main beam, which is the main beam of the other basic air beam structure that is to be brought into contact with the main beam included in the one basic air beam structure, is made one size larger than a first main beam, which is the main beam of the one basic air beam structure that is to be brought into contact with the main beam included in the other basic air beam structure; In the third step, the center of the second main beam in the axial direction is caused to pass over the center of the first main beam in the axial direction. How to erect an air beam structure.

9. The other basic air beam structures are multiple. A method for erecting an air beam structure according to claim 1, 4 or 8.

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