JPH10121787A - Connecting air chamber and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly inspect the airtightness of respective air chambers in a connecting air chamber constituting an air column of an air tent or the like. SOLUTION: The primary side air chamber a1 is expanded singly to inspect the airtightness of the chamber. And a one-way valve is fitted to a pedestal 4 provided in the secondary side air chamber a2. Air is injected through the one-way valve to expand the secondary side air chamber a2 and confirm the airtightness. Then the one-way valve is removed and the connection opening 8 opened at the joint of the primary side air chamber a1 and the opening 3 of the secondary side air chamber a2 are arranged to butt and stick to each other. And the inspection of airtightness and the repair of air leakage part of both air chambers a1, a2 are carried out in a singly separated state of the air chambers. In this way, the workability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connected air chamber formed by connecting air chambers formed by bonding rubber cloths and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, an air chamber used for forming an air column or the like of an air tent is formed as a substantially cylindrical air-tight bag by bonding an air-tight sheet such as a rubberized cloth. By connecting a required number of the air column structures, an air column structure 100 serving as a skeleton of an air tent as shown in FIG. 17 is formed.

In the case of the above-described air column structure 100, one end of a required number of horizontal air columns 102 is connected to the side surface of the air column 101 formed in an arch shape, and the air chambers of both air columns 101, 102 are connected to each other. Are communicated with each other to form an air column unit 103 including an air chamber. In addition, the air column unit 1
03 is an inlet 10 for injecting air into the lower part of the air column 101.
The air column 101 and each of the horizontal air columns 102 are configured to expand by injecting air from the injection port 106.

In the air column 100 structure, a plurality of air column units 103 are prepared, and these units 103 are connected to each other.
Adhesion is made sequentially by bonding through a connecting tool 104 provided at the tip of each transverse air column 102, and along the leading end of each transverse air column 102 of the gas column unit 103 connected to the extreme end. The end air column 105 formed in the shape of an arch like the air column 101 is connected. That is, the entire length of the air column structure 100 can be arbitrarily set by increasing or decreasing the number of the air column units 103.

Conventionally, an air chamber 101 (air column) having an air inlet 106 like the air chamber unit 103 described above.
When connecting the air chamber 102 (horizontal air column) not having the air injection port 106 to the air chamber, first, an arched air chamber 101 is formed by attaching a rubberized cloth, and provided below the air chamber 101. Air is injected from the air inlet 106 to expand the air chamber 101, and an airtight test is performed. An air chamber 101 that has passed this airtight inspection is provided with a horizontal air column air chamber 102 at a predetermined location on the peripheral surface.
Is opened.

[0006] On the other hand, the air chambers 102 constituting each transverse air column are:
After forming a substantially cylindrical airtight bag by laminating a rubber cloth, an opening 102a is opened at one end and this opening 1a is opened.
02a is connected to the communication port 101a formed on the peripheral surface of the air chamber 101 as described above, and is bonded in an airtight state by bonding with a substantially annular airtight tape 111 and a mounting cloth 112. (FIG. 16).

Then, as described above, both air chambers 101, 1
The connection air chamber 103 (air chamber unit) to which the air chamber 02 is connected inflates the air chambers 101 and 102 by injecting air from an air injection port 106 provided in the air chamber 101, and inspects the airtightness of each bonded portion.

[0008]

However, in the connection air chamber 103 manufactured as described above, since the air chamber 102 is not provided with an air inlet, both air chambers 101 and 1 are not provided.
It is not possible to perform an airtight inspection of the air chamber 102 before connecting the air-conditioner 02.

Therefore, the above-mentioned connecting air chamber 103 is connected to the primary side of the air chamber 102 on the basis of the air inlet 106 without performing an airtight inspection of the air chamber 102 connected to the secondary side of the air chamber 101. Since the connection to the air chamber 101 is completed, an airtightness inspection performed after the connection air chamber 103 is completed,
When the occurrence of air leakage is confirmed, it is necessary to carefully examine the bonded portion and the connection portion of the air chamber 102 to find the air leakage portion, and repair it.

[0010] However, since the above-described work for finding and repairing an air leak location is performed in a state in which both air chambers 101 and 102 are connected, it is difficult to handle the work, and compared with the case where a single air chamber is repaired. And it took a lot of trouble.

As described above, the connection between the air chambers 101 and 102 connected by using the airtight tape 111 and the mounting cloth 112 is such that one mounting cloth 112 is connected to one air chamber 1.
01, and at the same time, the other mounting cloth 112 deforms in accordance with the inflated shape of the air chamber 102, so that the connection portions of the curved air chambers 101 and 102 fit well. In this state, a strong connection against deformation can be maintained (FIG. 15).

However, in the above-described conventional connection structure, the airtight tape 111 is separately bonded to both the opening and the communication port 101a and the opening 102a, and the adhesive margins of these airtight tapes 111 are accurately determined. Therefore, the number of members required for maintaining the airtightness is increased, and the work of bonding them is also difficult, requiring a great deal of labor.

It is an object of the present invention to provide a structure and a manufacturing method capable of smoothly performing an airtight inspection of each air chamber in the connecting air chamber as described above. And In addition, in addition to the above objects, the invention according to claim 3 or 4 requires a small number of members necessary for maintaining airtightness at the connection portion between the air chambers having curved surfaces, and can easily perform the bonding work of these members. It is an object to provide a structure and a manufacturing method.

[0014]

According to the present invention, there is provided a primary air chamber having an air inlet,
A method of manufacturing a connection air chamber that connects a secondary air chamber that does not have an air inlet and connects both air chambers, and comprises forming a primary air chamber that has an air inlet, While air is injected from the inlet to check the expansion and airtightness of the air chamber, a ventilation opening is opened at the connection between the secondary air chambers configured as the air chamber, and air is injected from the ventilation opening. The secondary air chamber is inflated, the ventilation opening is closed by a ventilation opening / closing means detachably attached to the ventilation opening, and the expansion and airtightness of the secondary air chamber are confirmed. After removing the opening / closing means, the ventilation opening of the secondary air chamber and the communication port opened at the connection portion of the primary air chamber are bonded together and adhered, and air is injected from the air inlet of the primary air chamber. Injection is performed to check the expansion and airtightness of the connection air chamber.

The above-mentioned air chamber is a gas-tight bag formed by bonding air-tight sheets, such as rubberized cloth and vinyl chloride, by adhesion or welding. Further, the vent opening / closing means means a configuration having a function of opening / closing a ventilation opening, such as a one-way valve, an opening / closing plug, and the like.
It means a lid or the like.

According to the above-described method for manufacturing the connection air chamber, when air is injected from the air injection port after the primary air chamber is formed, the air chamber expands, and the airtightness can be inspected. Further, after injecting air into the air chamber from the ventilation opening of the secondary air chamber and closing the ventilation opening by the ventilation opening / closing means attached to the ventilation opening, the expanded state of the secondary air chamber and airtightness Can be inspected.

When the ventilation opening / closing means is removed from the ventilation opening of the secondary air chamber, and the ventilation opening of the same air chamber and the communication port of the primary air chamber are adhered to each other, the primary side and the secondary side are opened. The air chambers are integrally connected in a state where they communicate with each other. Then, when air is injected from the air inlet of the primary air chamber, both the primary and secondary air chambers communicating as the air chamber expand as described above, and the airtightness of the connection air chamber can be inspected. it can.

The connecting air chamber of the present invention is manufactured based on the above manufacturing method.

According to a third aspect of the present invention, a connecting portion between a primary air chamber having an air inlet and a secondary air chamber having no air inlet is connected to each other, and the two air chambers communicate with each other. In the newly formed connection air chamber, a communication port is opened at a connection site on the outer periphery of the primary air chamber, and an opening having a diameter larger than the communication port is provided at a connection site of the secondary air chamber connecting the communication port. A valve mounting pedestal is adhered to the air chamber surface around the opening, and a one-way valve that opens a central hole formed through the center of the pedestal toward the secondary air chamber. Adhesive allowance that is configured as a mounting hole that can be detachably attached and that is provided at the part of the base that extends inward from the rim of the secondary air chamber opening is bonded to the rim of the primary air chamber communication port Then, the opening and the communication port are joined in a state of being kept airtight,
Around the communication port and the opening between the surfaces of the connection portions between the primary side air chamber and the secondary side air chamber, two annular mounting cloths are interposed in a state of being overlapped with each other, and the two mounting cloths are mutually connected. The fixing cloth is fixed along the annular shape of the cloth, and one side of the mounting cloth is bonded to the surface of one air chamber, and the other side is bonded to the surface of the other air chamber.

According to the connection air chamber described above, the communication port opened at the connection part of the primary air chamber and the opening opened at the connection part of the secondary air chamber are formed in an annular base for mounting a valve. Are joined through. The pedestal is bonded from the air chamber side to the periphery of the opening of the opening formed in the secondary side air chamber, and the margin of the communication port opened on the end face of the primary side air chamber is extended to the inside of the opening. Adhered to the part. This allows
The communication port and the opening are joined in a state where the air escape path from the periphery of the both edges to the outside is closed by the adhesive surface of the pedestal, and is kept airtight.

The mounting holes of the pedestal to be bonded as described above allow communication between the primary and secondary air chambers, and the one-way valve can be removably mounted. Further, in the process of manufacturing the connection air chamber, when a one-way valve is mounted in the mounting hole, air can be injected into the secondary air chamber through the one-way valve to expand the air chamber. .

Two annular mounting cloths are interposed around the communication port and the opening between the connection part of the primary air chamber and the connection part of the secondary air chamber. The two mounting cloths are integrated by fastening each other along the annular shape of the cloth, one surface of which is connected to the connection surface of the primary air chamber, and the other surface is connected to the connection of the secondary air chamber. Adhered to the surface. Therefore, both the primary side and the secondary side air chambers are joined via the fastening portion of the mounting cloths provided around the communication port and the opening, and the load applied to the connection between the two air chambers is smaller than the outer diameter of the air chamber. Can also be received flexibly by deformation of the small-diameter annular fastening portion.

According to a fourth aspect of the present invention, there is provided the method for manufacturing a connection air chamber, wherein the air is supplied from the air inlet of the primary air chamber in a single state before connecting the primary and secondary air chambers. To check the expansion and airtightness of the same air chamber, while installing a one-way valve in the mounting hole of the secondary air chamber in a single state, and injecting air through the one-way valve, Check the expansion and airtightness of the secondary air chamber, remove the one-way valve from the mounting hole, open a communication port at the connection part of the primary air chamber, and then connect the communication port of the primary air chamber and the secondary air chamber. The openings of the chambers are joined to connect the two air chambers into a single air chamber, and air is injected from the air inlet of the primary air chamber to check the expansion and airtightness of the connected air chamber.

According to the above-described manufacturing method, when air is injected from the air inlet of the primary air chamber in a single state, the air chamber expands and the airtight state can be inspected. On the other hand, when a one-way valve is mounted in the mounting hole of the pedestal provided in the secondary side air chamber in a single state, and air is injected through this one-way valve, the air chamber expands and the airtight state is established. Can be inspected. Thereafter, the one-way valve is removed from the pedestal of the secondary air chamber, and the opening of the same air chamber is connected to the communication port opened at the connection portion of the primary air chamber, and the primary side and the secondary side are joined. The air chambers communicate with each other like a single air chamber and are integrally connected. When air is injected from the air inlet of the primary air chamber, both the primary and secondary air chambers communicating via the connection portion expand,
The airtightness of the connection air chamber can be inspected.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a connection air chamber according to the present invention. This connection air chamber is used as an air chamber structure such as an air column of an air tent. As shown in FIG. 2, the connection air chambers are formed at the ends of three substantially cylindrical air chambers a2 with respect to the center of the arched air chamber a1 and the peripheral surfaces at both left and right sides. The sections are connected horizontally, and the two air chambers a1 and a2 are connected as one air chamber, thereby forming an air column unit a. That is, the air column unit a is configured such that three air chambers a2 are connected at right angles to the peripheral surface of the air chamber a1. The air column unit may be configured by connecting two or four or more air chambers a2 to the air chamber a1.

The air column unit a, that is, the connecting air chamber, is expanded by injecting air from one air inlet b provided below the air chamber a1. The air chamber a1 is a primary air chamber and the air chamber a2 is a secondary air chamber on the basis of.

A plurality of air column units a configured as described above are connected in the direction of the full length of the air tent, and an air column formed at the end of the air column unit in an arch shape like the air chamber a1. By connecting the unit a ′, the air column structure of the air tent is configured as shown in FIG. Incidentally, the air column structure is assembled as an air tent by covering a tent ground made of a waterproof sheet on the air column structure.

Each of the air chambers a2 serving as secondary air chambers is made of a rubberized cloth made of a cloth sheet coated on both front and back surfaces with rubber layers, and is formed as an airtight cylinder whose outer shape expands in a substantially cylindrical shape. It is. The member 2b constituting the end face of the air chamber a2 is cut into a circle, and the outer periphery thereof is folded and bonded to the inner periphery of the end opening of the member 2a constituting the outer periphery of the air chamber a2. An airtight tape 2c made of a rubber cloth or a rubber sheet is adhered along the inside of the bonded portion to maintain the airtightness of the portion. When a rubberized cloth is used as the airtight tape 2c, a double-sided rubberized cloth or a single-sided rubberized cloth may be used, but a single-sided rubberized cloth is suitable from the viewpoint of workability during manufacturing. In the present embodiment, the member 2a is bonded to the outside of the outer periphery of the member 2b to join the air chamber a2. However, the joint of the air chamber a2 is provided outside the member 2a. May be folded and bonded, and an airtight tape 2c may be bonded inside the member 2a (not shown).

At the center of the end of the air chamber a2, the air chambers a
1 and a2 are opened, and the opening 3
A pedestal 4 to which a one-way valve c to be described later is detachably attached is bonded to the air chamber surface side. Along the outer peripheral edge of the pedestal 4, a back reinforcing cloth 9 for covering a mounting surface between the outer peripheral edge and the member 2b is bonded. The back reinforcing cloth 9 is formed by forming a rubber-coated cloth or a rubber sheet into a ring shape, and is adhered so as to cover the outer peripheral edge of the pedestal 4, thereby increasing the airtightness and strength in the same portion.

When a rubber-coated cloth is used as the back reinforcing cloth 4, it may be a one-sided rubber-coated cloth or a double-sided rubber-coated cloth. Similar to, a single-sided rubberized cloth is suitable. When a single-sided rubber cloth is used, the rubber surface is attached to the pedestal 4.

The pedestal 4 is formed in a relatively thick ring shape using a rubber material or a soft synthetic resin or the like, and the distribution of the thickness is changed in a tapered shape from the center to the outer peripheral edge to form a flat shape. Is adhered to the periphery of the opening 3 on the inner surface of the air chamber a2. The pedestal 4 has a cylindrical portion 5a that forms the mounting hole 5 of the one-way valve c inserted and fixed at the center.

The cylindrical body 5a is formed in a cylindrical shape using a synthetic resin or the like, and a flange 5b provided on the outer peripheral surface is embedded in the thickness of the pedestal 4 and one end thereof protrudes from the outer surface of the pedestal 4. It is fixed in the state where it is made to be. On the inner peripheral surface of the mounting hole 5, a screw portion 5d into which the one-way valve c is removably screwed is threaded.

Incidentally, the mounting hole 5 is a hole which communicates the two air chambers a1 and a2 connected to each other, and
Before connecting 1 and a2, it is also a mounting hole for mounting the one-way valve c. In the manufacturing process, by inflating the air chamber a2 through the one-way valve c mounted on the mounting hole 5, the airtight inspection of the air chamber a2 was considered so that the air chamber a2 could be performed in a single state. (Figure 1
0). The method of mounting the one-way valve c and the method of inspecting the airtightness of the air chamber a2 will be described in detail later in the description of the manufacturing method.

The outer diameter of the cylindrical body 5a of the pedestal 4 is smaller than the diameter of the opening 3 formed in the member 2b on the end face of the air chamber a2. An adhesive margin 4a is formed between the outer peripheral surface of the cylindrical body 5a.

On the other hand, the air chamber a1 serving as the primary air chamber is made of a rubber cloth covered with rubber layers on both front and back surfaces in the same manner as the air chamber a2. For example, in this embodiment, six cylindrical rubberized cloths are connected,
As shown in FIG. 2, it is configured to expand in an arch shape.

An opening 3 at the end of the air chamber a2 is provided at a location where the end of each air chamber a2 is connected to the outer peripheral surface of the air chamber a1.
An opening 8 'is formed to join with the opening. The opening 8 'is preliminarily opened in order to accurately attach an edge member 8a, which will be described later, and has an inner diameter slightly larger than the outer diameter of the cylinder 5a of the air chamber a2. An edge member 8a formed by forming a rubber sheet into a ring shape is adhered from the inside of the opening 8 ', and the opening of the edge member 8a is configured as the communication port 8 of the air chamber a1. Further, the communication port 8 is made to correspond to the outer diameter of the cylinder 5a of the air chamber a2.
The edge member 8a may be formed using a single-sided rubberized cloth or a double-sided rubberized cloth. However, a single-sided rubberized cloth is preferable in terms of workability during manufacturing.

As described above, the communication port 8 of the air chamber 1a constituted by the edge member 8a is fitted to the outer peripheral portion of the cylinder 5a of the air chamber a2, and the outer surface of the edge member 8a around the communication port 8 is connected. The bonding margin 4a of the pedestal 4 and the surface of the member 2b around the opening 3 are bonded via an adhesive. Thus, the gap between the opening 3 and the communication port 8 is in a state where the portion around the communication port 8 of the air chamber a2 is bonded in an airtight state by being bonded to the bonding margin 4a. Become.

Around the opening 3 and the communication port 8 between the end surface of the air chamber a2 and the outer peripheral surface of the air chamber a1, two ring-shaped mounting cloths 6 are interposed in a state of being stacked.
Both mounting cloths 6 are formed in a ring shape having an outer diameter smaller than the outer diameter of the air chamber a2 and an inner diameter substantially equal to the bonding radius of the airtight holding portion. In addition, the both mounting cloths 6
It is integrated by sewing on the fastening line 6a along the inner edge of the same cloth width (FIG. 4).

Then, one surface of the mounting cloth 6 integrated as described above is adhered to the end surface of the air chamber a2,
The other surface is adhered to the outer peripheral surface of the air chamber a1. As a result, both mounting cloths 6 are separated from the respective air chambers a to be the bonding surfaces.
It deforms along the outer surface shape of 1 and a2, and is adhered in a state of close contact (FIG. 3). In the present embodiment, sewing is selected as a means for fastening the two attachment cloths 6 to each other. However, both attachment cloths 6 are fastening means other than sewing, for example, those using a welder or an adhesive, or These and sewing together may be used.

As described above, the connection between the two air chambers a1 and a2 is firmly connected by the sewn portion along the fastening line 6a. Therefore, in the inflated state, the load applied to the connection between the two air chambers a1 and a2 can be flexibly received by the deformation of the sewn portion, which is relatively small in diameter and is annularly fastened, and secures sufficient connection strength. be able to.

Next, a method of manufacturing the connection air chamber a will be described with reference to FIGS. Air chamber a1 and air chamber a
2 are formed separately, and after performing an airtight inspection individually, predetermined connection portions are connected.

The air chamber a1, which is a primary side air chamber, is formed in an arch shape by connecting a required number of rubberized cloths which are stuck in a substantially cylindrical shape while being slightly bent in the axial direction, and formed at both ends thereof. By closing the opening, the air chamber is completed as a single unit. An air inlet b and a safety valve (not shown) that opens at a predetermined pressure are provided below the air chamber a1.

The air chamber a1 is formed by injecting air from an air injection port b provided at the lower end of the air chamber a1 before opening the communication port 8 at a location where each air chamber a2 is connected. 7
And the airtightness of the air chamber a1 is inspected. If an air leak is found in the airtightness inspection, repair of the air leak is completed before connection with the air chamber a2.

On the other hand, the air chamber a2 is formed in a cylindrical shape by sticking a rubber cloth, and as described above, the pedestal 4 is adhered to the inner surface of the opening 3 formed in the member 2b at one end. . Then, the one-way valve c is screwed into the mounting hole 5 of the pedestal 4 and mounted (FIGS. 8 and 9).

As shown in FIG. 9, the one-way valve c has a cylindrical valve case c1 screwed into the mounting hole 5 of the pedestal 4, and a rubber valve is provided at one end of the valve case c1. Body c
2, the valve body c2 comes into contact with and separates from a valve seat c3 provided at one end of the valve case c1.
It is configured to open or close the valve. The valve c
2 maintains the valve closed state by its own elasticity, and when a certain pressure or more acts on the other end of the valve case c1,
The valve is configured to open elastically. In addition, the one-way valve c is configured such that a lid c4 is screwed into the other end of the valve case c1 so that airtightness in the closed state can be completely maintained.

The one-way valve c is screwed into the mounting hole 5 of the pedestal 4 with the valve element c2 facing into the air chamber 2. Then, air is injected from the other end of the one-way valve c, and the air chamber a
2 is inflated, and the airtightness of the air chamber a2 is checked (FIG. 10). If an airtight leak is found in this inspection, the air leak is repaired before connection with the air chamber a1. As described above, the airtightness inspection of the air chamber a2,
The repair work for air leaks is performed in the same air chamber a2 as a single unit, so that the trouble of handling is greatly reduced,
Work efficiency can be greatly improved.

After the air chamber a2 is expanded and the airtight leak test is completed, the one-way valve c is removed to contract the air chamber a2. The removed one-way valve c is mounted in another air chamber a again, and the same airtightness inspection as described above is performed. That is, the one-way valve c is used repeatedly.

After the airtightness of both air chambers a1 and a2 has been completed, openings 8 'are opened at each connection point of air chamber a1, and a rim member 8a is adhered from inside to form a communication port 8. . Then, an adhesive is applied to a bonding area around the communication port 8, the communication port 8 is fitted to the outer periphery of the cylindrical body 5 a of the air chamber a 2, and the bonding area is set to the bonding margin 4 a of the pedestal 4. Opening 3
It is adhered to the surface of the surrounding member 2b. At this time, the attachment cloth 6 is interposed between the air chamber a1 and the air chamber a2. Then, after the above-mentioned bonding is completed, one of the mounting cloths 6 is bonded to the surface of the air chamber a1, and the other mounting cloth 6 is bonded to the surface of the air chamber a2.

Thus, the air chamber a1 and each air chamber a2 are
They communicate with each other through the mounting holes 5 and are configured as a connection air chamber of a single air chamber, that is, an air column unit a (FIG. 11). Air chamber a
1 and a2 are connected to each other to form an air column unit a.
Air is injected from an air injection port b provided at a lower portion of the airbag 1 and expanded until a safety valve (not shown) is opened, and an airtight inspection is performed. The safety valve (not shown) sets its operating pressure to an internal pressure suitable for the air chambers a1 and a2 constituting the air column unit a.
2 is always maintained at an appropriate internal pressure. In the above case, air was injected until the safety valve (not shown) was opened. However, air was injected into the air column unit a.
It is not always necessary to perform the operation until the safety valve operates, and the pressure may be set lower than the pressure at which the safety valve operates.

As described above, since the airtightness inspection of the air chambers a1 and a2 has been completed, if the airtightness leakage occurs in this inspection, the airtightness leakage occurs at the last bonded connection portion. Will be. Therefore, the work of finding the airtight leak can be easily performed because the inspection range is specified.

The connecting air chamber shown in FIG. 5 has the same configuration as the air column unit a shown in FIG. 1, but uses a rubber sheet as a member 2b 'constituting the end face of the air chamber a2. I have. The rubber sheet does not communicate between the end faces of the sheet due to minute pores formed between the fibers as in the case of a rubber cloth. That is, as shown in FIG. 1, when the member 2b ′ is made of a rubberized cloth, the air chambers a1,
There is a possibility that the air in a2 may escape from the cut end surface of the above-mentioned member to the cut end surface and flow out minutely, but by using the same member 2b 'as a rubber sheet, the escape of the air generated in the above-mentioned path is prevented. be able to.

Further, even when a rubber cloth is used as a member of the end face of the air chamber a2, the outer peripheral portion is formed in the end portion of the member 2a constituting the outer peripheral surface of the air chamber a2 as shown in FIG. By folding and adhering to the peripheral side, workability is slightly reduced, but it is possible to prevent the above-mentioned air leakage. In this regard, when the rubber sheet is used for the member 2b 'as described above, air leakage does not occur even if the outer peripheral portion of the member 2b' is folded toward the outer peripheral end of the member 2a on the outer peripheral surface of the air chamber a2. It is excellent in that it is easy to do.

The method of manufacturing the connection air chamber is slightly different in the members constituting the end surfaces of the air column unit a and the air chamber a2 and the bonding structure of the peripheral portion of the member. This is the same as the case of the column unit a.

In the above-described embodiment, the communication port 8 is formed by attaching the rim member 8a to the opening 8 'of the air chamber a1 from the inside. As shown in FIG. The communication port 8 is opened directly in the air chamber a1, and the communication port 8 is opened.
The outer surface of the periphery of the rim may be bonded to the bonding margin 4a of the pedestal 4. Further, between the outer peripheral surface of the edge member 8a and the pedestal 4, it is preferable to apply an air bleed preventing agent such as an adhesive in order to prevent air bleed. When the connection air chamber is manufactured, a communication port 8 corresponding to the outer diameter of the cylindrical body 5a of the air chamber a2 is opened in the air chamber a1, and the edge of the communication port 8 is directly connected to the pedestal 4. The work efficiency is good because it only has to be bonded to the bonding margin 4a.

The connecting air chamber according to the present invention may be configured to connect the air chambers to each other by using the same structure as the connecting portion of the connecting air chamber a. The location may be changed arbitrarily. For example, like the connecting air chamber shown in FIG. 6, the peripheral surfaces of the two air chambers a1 'and a2' formed in a substantially cylindrical shape may be connected to each other, or the air chambers formed in a substantially cylindrical shape may be connected to each other. May be connected to each other (not shown).

Further, according to the manufacturing method of the present invention, the primary air chamber is inflated in a single state, and the airtightness of the air chamber is inspected, while air is injected from the ventilation opening formed in the secondary air chamber. After checking the expansion and airtightness of the secondary air chamber by closing the vent opening / closing means detachably attached to the ventilation opening, the vent opening / closing means is removed, and the connection part of the primary side air chamber is removed. It is intended to have a process of adhering the communication port opened in and the ventilation opening of the connection part of the secondary side air chambers together, and the shape and connection form of the air chamber, the structure of the ventilation opening and closing means, And the mounting structure thereof may be arbitrarily changed.

For example, as the vent opening / closing means, an opening / closing plug c5 shown in FIG. 13 may be used in addition to the one-way valve described above. The opening / closing stopper c5 is a tubular body whose front end is closed, and is configured to be detachably screwed into a tubular mounting base 50 embedded in the pedestal 4 of the secondary air chamber a2.

The opening / closing plug c5 is a tubular body having a closed end, and has a mounting opening 51 of a mounting base 50 forming a ventilation opening.
In the state of being screwed and tightened inside, the outer peripheral portion of the distal end surface abuts the packing 52a of the airtight rim 52 provided around the inside of the mounting port 51 to close the mounting port 51 to be in a closed state, When the screw fitting is loosened, the airtightness between the packing 52a and the end face is broken to open the plug. Further, several ventilation holes 5 are provided on the peripheral surface of the tip of the opening / closing stopper c5.
3, the opening / closing plug c5 screwed into the mounting port 51 is somewhat loosened to open the airtight rim 52, and the air-tight rim 52 is opened. It is configured to be.

When the connecting air chamber is manufactured using the above-mentioned opening / closing plug c5, the opening / closing plug c5 is screwed halfway into the mounting opening 51 of the mounting base 50 when performing an airtightness inspection of the secondary air chamber a2. To maintain the open state (FIG. 13). Then, the injection nozzle d of the compressed air is screwed and connected to the primary side port 54 of the opening / closing plug c5 to start injection.

When the secondary air chamber a2 expands due to the injection of the compressed air, the above-mentioned opening / closing plug c5 is tightened to close it, and the injection nozzle d screwed into the primary opening 54 of the opening / closing plug c5 is removed. , The secondary air chamber a expanded as described above.
2. Inspection state and airtightness of 2. When the airtight inspection is completed, the opening / closing stopper c5 is loosened to discharge air from the secondary side air chamber a2, and the opening / closing stopper c5 is removed from the mounting base 50 when the same air chamber a2 is appropriately contracted.

Further, as the vent opening / closing means, FIG.
A lid c6 as shown in (a) and (b) may be used. The lid c6 is configured to screw into one end of a substantially cylindrical base screwed into the mounting hole 5 of the pedestal 4 to seal the opening of the base.

When the connecting air chamber is manufactured by using the lid c6 as the vent opening / closing means, in the airtightness inspection step of the secondary air chamber a2, as shown in FIG.
Air is injected by inserting a compressed air injection nozzle d into the opening of the base from which is removed. And the secondary side air chamber a2
After sufficient expansion, pull out the injection nozzle d,
The cover c6 is quickly screwed into the base and sealed (FIG. 14-
b). The air in the secondary air chamber a2 slightly leaks until the lid c6 is screwed into the base, but there is no problem if the work is completed quickly. When the airtightness inspection is completed, the lid c4 is loosened, air is discharged from the secondary air chamber a2, and when the pressure in the air chamber a2 is appropriately reduced, the lid c4 is removed from the base and the lid mounting hole 5, The process proceeds to the next air chamber connection step.

In each of the above embodiments, the connection air chamber constituting the air column structure of the air tent has been described. However, the connection air chamber and the manufacturing method of the present invention are not limited to the air column structure of the air tent. Can be similarly adopted.

[0064]

As described above, according to the present invention, when the primary air chamber provided with the air inlet and the secondary air chamber are connected in communication with each other, the primary air chamber is connected in a single state. While the air chamber is inflated as it is and the airtightness of the air chamber is inspected, the air chamber is expanded by injecting air from a ventilation opening formed in the secondary side air chamber, and the air is opened and closed by a vent opening / closing means attached to the ventilation opening. After confirming the expansion and airtightness of the secondary side air chamber by closing the opening, the vent opening / closing means is removed from the ventilation opening, and the communication port opened at the connection part of the primary side air chamber is connected to the secondary side air chamber. The side air chamber is bonded to a ventilation opening provided at a connection portion of the side air chamber.

Therefore, before connecting the primary side and the secondary side air chambers, it is possible to complete the inspection of the air leaks of these air chambers. Can be repaired in a single state. Therefore, compared with the case where the primary and secondary air chambers were connected as before, and the airtightness inspection and the repair work of the airtight leaking part were performed, the handling during the airtightness inspection and the repair work was much more difficult. It is easy and can greatly improve work efficiency. Also, after connecting the connecting portions of the primary side and the secondary side air chambers and then performing an air tightness test by expanding the connecting air chambers, when the occurrence of airtight leakage is confirmed, Since the location of the airtight leak can be specified as the connection portion, the repair of the airtight leak can be easily performed.

Further, when the secondary air chamber is inflated, a vent opening / closing means is attached to the ventilation opening. The vent opening / closing means is removed and used repeatedly after the airtight inspection of the secondary air chamber. It is reasonable in terms of cost.

In the connecting air chamber manufactured according to the manufacturing method of the first aspect, a vent opening / closing means is attached to the ventilation opening of the secondary air chamber in the manufacturing process.
Before the connection, the airtightness of the secondary air chamber can be inspected. As a result, in the manufacturing process, the same effect as that of the first aspect can be obtained.

According to the third aspect of the present invention, the one-way valve can be detachably mounted in the mounting hole of the valve mounting base provided at the opening of the secondary side air chamber. In the process, by mounting a one-way valve in the mounting hole, by injecting air into the secondary air chamber through the one-way valve,
It is possible to more easily perform the expansion and airtightness inspection of the same air chamber, and as a result, it is possible to obtain the same effect as the first aspect of the present invention.

[0069] Further, since the communication port of the primary side air chamber and the opening of the secondary side air chamber can be joined in an airtight manner by using one valve mounting base, two pieces are joined at the same portion. As compared with the conventional connection structure that required the airtight tape, the number of members required for maintaining the airtightness can be reduced, the structure can be simplified, and the manufacturing time and cost can be reduced.

Further, the above-mentioned joining by the pedestal is performed only by adhering around the opening having a large inner diameter and adhering the margin of extension extending inside the opening to the periphery of the communication port to be adhered. Compared with a conventional structure in which the communication ports of both air chambers are accurately matched with each other, and the periphery of the opening of the two airtight tapes is attached to each other and bonded, the work of bonding the airtight holding portion is It is simple and can be securely joined without airtight leakage.

According to a fourth aspect of the present invention, a one-way valve is mounted on a valve mounting pedestal of the secondary side air chamber in the process of manufacturing the connection air chamber according to the third aspect having the above-described features. Inflate the same air chamber as a single unit via a one-way valve, check the airtightness, remove the one-way valve from the pedestal of the secondary air chamber, and connect the primary and secondary air chambers Therefore, in the manufacturing process of the connecting air chamber having the above structure, the maneuverability at the time of airtightness inspection and repair work is improved and the work efficiency is greatly improved, as in the invention according to claim 1. Can be.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a connection portion of a connection air chamber of the present invention.

FIG. 2 is a perspective view showing an air column structure of an air tent formed by combining the connection air chambers of the present invention.

FIG. 3 is a perspective view showing a connection portion of the connection air chamber.

FIG. 4 is a perspective view showing a mounting cloth.

FIG. 5 is a longitudinal sectional view showing a connection portion of a connection air chamber in which an end surface member of a secondary air chamber is made of a rubber material.

FIG. 6 is a perspective view showing a partially omitted connection air chamber formed by connecting peripheral surfaces of the air chambers.

FIG. 7 is a perspective view showing a state where a primary air chamber is expanded.

FIG. 8 is a perspective view showing a secondary air chamber in an expanded state.

FIG. 9 is a longitudinal sectional view showing a connection portion of the secondary side air chamber.

FIG. 10 is a front view showing a state where the secondary air chamber is expanded.

FIG. 11 is a perspective view showing a state where the assembled connection air chamber is expanded.

FIG. 12 is a longitudinal sectional view showing a connection portion of a connection air chamber formed by bonding a communication port directly opened to a primary air chamber to a bonding margin of a secondary air chamber.

FIG. 13 is a longitudinal sectional view showing a connection part of a secondary air chamber using an opening / closing stopper as a vent opening / closing means.

FIGS. 14A and 14B are longitudinal sectional views showing a connection portion of a secondary air chamber using a lid as a vent opening / closing means, wherein FIG. 14A is a state in which an air injection nozzle is inserted, and FIG. It shows the state where it was done.

FIG. 15 is a perspective view showing a connection portion of a conventional connection air chamber.

FIG. 16 is a longitudinal sectional view showing a connection portion of a conventional connection air chamber.

FIG. 17 is a perspective view showing an air column structure of an air tent configured using a conventional connection air chamber.

[Explanation of symbols]

 a ... Air column unit (connection air chamber) a1 ... Primary air chamber a2 ... Secondary air chamber b ... Air inlet c ... One-way valve c5 ... Opening / closing plug c6 ... Lid 3 ... Opening 4 ... Pedestal 4a ... Adhesion allowance 5 ... Mounting hole 6 ... Mounting cloth 8 ... Communication port

Claims (4)

[Claims] A primary air chamber having an air inlet;
A method of manufacturing a connection air chamber that connects a secondary air chamber that does not have an air inlet and connects both air chambers, and comprises forming a primary air chamber that has an air inlet, While air is injected from the inlet to check the expansion and airtightness of the air chamber, a ventilation opening is opened at the connection between the secondary air chambers configured as the air chamber, and air is injected from the ventilation opening. The secondary air chamber is inflated, the ventilation opening is closed by a ventilation opening / closing means detachably attached to the ventilation opening, and the expansion and airtightness of the secondary air chamber are confirmed. After removing the opening / closing means, the ventilation opening of the secondary air chamber and the communication port opened at the connection portion of the primary air chamber are bonded together and adhered, and air is injected from the air inlet of the primary air chamber. Injection is performed to check the expansion and airtightness of the connection air chamber. Method. 2. A connecting air chamber manufactured based on the manufacturing method according to claim 1. 3. A connecting air chamber formed by connecting a connecting portion between a primary air chamber having an air inlet and a secondary air chamber not having an air inlet and connecting both air chambers. A communication port is opened at a connection site on the outer periphery of the primary air chamber, and an opening having a diameter larger than the communication port is opened at a connection site of the secondary air chamber connecting the communication port. Attaching a valve mounting base to the air chamber surface side,
A central hole formed through the center of the pedestal is configured as a mounting hole for detachably mounting a one-way valve that opens toward the secondary air chamber, and an opening of the secondary air chamber opening in the pedestal. The bonding margin provided in the portion extending inward from the edge is bonded to the rim of the primary-side air chamber communication port, and the above-mentioned opening and the communication port are joined in an airtight state, and the primary side air-chamber is connected. Around the communication port and the opening between the surfaces of both connecting parts of the chamber and the secondary side air chamber,
Two annular mounting cloths are interposed in a state of being overlapped with each other, and the two mounting cloths are fastened together along the annular shape of the same cloth, and one side of the mounting cloth is attached to the surface of one air chamber, and the other side is attached to the other side. Are connected to the surface of the other air chamber, respectively. 4. The method for manufacturing a connecting air chamber according to claim 3, wherein air is injected from an air inlet of the primary air chamber in a single state before connecting both the primary and secondary air chambers. do it,
While confirming the expansion and airtightness of the same air chamber, a one-way valve is mounted in the mounting hole of the secondary air chamber in a single state, and air is injected through the one-way valve, whereby the secondary air chamber is inflated. After confirming the expansion and airtightness of the one-way valve, remove the one-way valve from the mounting hole, open a communication port at the connection part of the primary air chamber, and then connect the communication port of the primary air chamber and the opening of the secondary air chamber. A manufacturing method comprising joining the two air chambers to form a single air chamber and injecting air from an air inlet of the primary air chamber to check expansion and airtightness of the connected air chamber.