JP2000104421A - Air chamber connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase rigidity of a connection part between both air chambers in an air chamber connection structure connecting one end part of one air chamber to the outer peripheral surface of the other air chamber. SOLUTION: An opening edge of one end part of one air chamber 1 is cut off so that it is formed roughly in an arc shape as viewed from the side, and a roughly elliptic cover cloth 3 is fitted tightly along the opening edge. Also, a sticking tolerance 3a provided along the outer peripheral edge of the cover cloth 3 is folded and stuck on the air chamber outer peripheral surface along the opening edge of one air chamber 1, and an air-tight tape 4 is stamped along the sticking part between the opening edge part inside one air chamber 1 and the cover cloth 3. Then the opening at one end part of the air chamber 1 is closed by the cover cloth 3, and a sticking surface 3b formed of the cover cloth 3 is stuck entirely to the outer peripheral surface of the other air chamber 2 so as to connect one end part of the air chamber 1 to the outer peripheral surface of the air chamber 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air chamber connection structure for connecting one air chamber end to an outer peripheral surface of another air chamber.

[0002]

2. Description of the Related Art Conventionally, in an air chamber made of a substantially cylindrical rubber cloth forming an air column of an air tent, for example, an end of the air chamber is connected to another air chamber to form the above-mentioned structure. It becomes necessary to connect to the outer peripheral surface. FIG. 8 shows a conventional air tent 100 and its air column structure 100 ′. FIG. 7 shows a connection portion between the air chambers of the air column structure.

Conventionally, when the end of one air chamber is connected to the outer peripheral surface of the other air chamber as described above, the shape of the connection portion is curved, so that the connection portion is unnatural. The connection may be made in a deformed state. Therefore, in the conventional air chamber connection structure, in order to avoid the above-mentioned problem, a ring-shaped connection between the communication ports opened in both air chambers, for example, as disclosed in Japanese Utility Model Laid-Open No. 5-51627. And an airtight tape formed using a mounting cloth.

As shown in FIG. 7, in the conventional connection structure described above, an opening 104 is opened at the center of an end face 101a of one air chamber 101, and the other end face 101a of the air chamber 101 is connected. An opening 105 having the same diameter as the above-mentioned opening 104 is opened on the outer peripheral surface of the air chamber 102, and these openings 105 and the opening 104 are overlapped.

[0005] Airtight tapes 106a and 106b cut into a ring shape are adhered to the inner surface of the air chamber 101 around the opening 104 and the inner surface of the air chamber 102 around the opening 105, respectively. The air chambers 101 and 102 are connected to each other in an airtight manner by bonding and adhering the adhesive margin portions in the inner peripheral half.

Further, the end surface 101a of the air chamber 101 described above.
Around the connection between the airbag 102 and the outer peripheral surface of the air chamber 102, two ring-shaped mounting cloths 108a, 108a, 1 are formed.
08b are superposed. The peripheral edges of the opening portions of the two mounting cloths 108a and 108b are integrally sewn and adhered and fixed to each other.
08a is bonded to the end face 101a of the air chamber 101, and the other mounting cloth 108b is bonded to the outer circumferential surface of the air chamber 102, so that the connection between the air chambers 101 and 102 is reinforced by the mounting cloths 108a and 108b. Have gone through.
Some of the conventional air chamber connection structures as described above are configured so as to connect the two air chambers 101 and 102 formed as independent air chambers without opening the openings 104 and 105. (Not shown).

[0007]

In the air chamber connection structure constructed as described above, one of the mounting cloths 108a is deformed in accordance with the expansion shape of one of the air chambers 101, and the other mounting cloth 108b is simultaneously formed. On the other hand, since the air chamber 102 is deformed in accordance with the inflated shape, the connection between the air chambers 101 and 102 is properly adjusted, and a reasonable connection state can be provided.

As described above, in the conventional connection structure, the connection between the air chambers 101 and 102 can be maintained in a well-adapted state, so that when a large load is applied, the connection can be maintained. It is possible to avoid that the part is flexibly deformed and an excessive load is applied to the connection part.

However, in the above-described air chamber connection structure, the connection area between the end surface 101a of the air chamber 101 and the outer peripheral surface of the air chamber 102 is inevitably reduced, so that the rigidity of the connection portion for preventing deformation is reduced. Inevitable decline, double air chamber 1
In some cases, the connection portions 01 and 102 may be deformed so as to shake. As described above, the air chambers 101 and 102
When the connecting portion between them is deformed so as to sway, a phenomenon in which the air column structure 100 'of the artent 100 itself sways due to the weather and the like appears, and there has been a demand for an improvement to improve the rigidity of the connecting portion.

An object of the present invention relates to the conventional air chamber connection structure as described above, and it is an object of the present invention to rationally improve the rigidity of a connection portion between the air chambers.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a rubber-coated cloth air chamber which expands in a substantially cylindrical shape. In the connection structure of the air chamber connected to the outer periphery of the air chamber made of a drawing cloth, the one air chamber is formed in a substantially cylindrical shape using a rubber drawing cloth, and an opening edge of one end thereof is substantially circular in a side view. The cover cloth formed into an arc shape and cut into a substantially elliptical shape along the opening edge of the one end portion is brought into close contact with each other, and the bonding allowance provided along the outer peripheral edge of the cover cloth is applied to the one air chamber. An airtight tape is folded back and adhered to the outer peripheral surface of the air chamber along the opening edge of one end, and an airtight tape is adhered along the inner peripheral surface along the opening edge portion inside the one air chamber and the inner surface of the adhesive portion of the cover cloth. The opening at one end of the air chamber is closed by the lid cloth to maintain airtightness, and the surface of the lid cloth is outside the other air chamber. Configured as concavely curved adhesive surface which allowed to contact the surface, those formed by entirely adhere the adhesive surface to the outer peripheral surface of the other air chamber.

According to the above means, one of the air chambers is formed in a substantially cylindrical shape by using a rubber cloth, and the opening edge of one end thereof is formed in a substantially arc shape in a side view. An outer peripheral portion of the cover cloth cut into a substantially elliptical shape is brought into close contact with the opening edge, and an adhesive margin provided on the outer peripheral portion is folded back and adhered to the outer peripheral surface of the air chamber along the opening edge portion. An airtight tape is attached along the inner peripheral surface along the opening edge inside the one air chamber and the inner surface of the bonding portion of the cover cloth. Thus, the opening at one end of one air chamber can be closed by the lid cloth, and the airtightness at the bonding portion between the lid cloth and the opening edge can be reliably maintained by the airtight tape.

[0013] Further, the cover cloth provided so as to close the opening at one end of the one air chamber is adhered along the shape of the opening edge of the one end of the air chamber, so that the surface side is concave. It is configured as a curved adhesive surface. In other words, the adhesive surface comes into close contact with the outer peripheral surface of the other air chamber in shape conformity. Then, the above-mentioned bonding surface is completely bonded to the outer peripheral surface of the other air chamber, so that it is firmly connected to the outer peripheral surface of the other air chamber by applying one end of one air chamber. can do. Further, the joining force of one air chamber to the outer peripheral surface of the other air chamber is determined by applying an airtight tape along the inner peripheral surface along the opening edge inside the one air chamber and the inner surface of the adhesive portion of the cover cloth. The adhesive strength of the airtight tape thus obtained and the adhesive strength of the margin of the lid cloth that is folded back and adheres to the outer peripheral surface of the air chamber along the opening edge are combined. The joining force between the chambers can be maintained more firmly.

According to a second aspect of the present invention, the connecting structure for the air chamber is provided with a reinforcing tape along a bonding portion between the outer peripheral surface of one end of the air chamber and the outer peripheral surface of the other air chamber. The joint portion between the two air chambers and the adhesive margin of the lid cloth along the outer peripheral surface of one end of one air chamber are entirely covered with the reinforcing tape.

In this case, the reinforcing tape is applied with a reinforcing tape along a bonding portion between the outer peripheral surface of one end of the air chamber and the outer peripheral surface of the other air chamber. By the reinforcing tape, the joint between the two air chambers and the adhesion allowance of the cover cloth along the outer peripheral surface of one end of one air chamber are applied so as to entirely cover the air chamber, and between the two air chambers exposed in the same portion. The joint part and the cover allowance of the cover cloth are completely covered and the appearance is improved, and the joint strength at the joint part is improved. In addition, when the reinforcing tape is provided with airtightness, the cover cloth is completely covered with the bonding margin of the cover cloth folded back and adhered to the outer peripheral surface along the opening edge of one end of one air chamber. Can be reliably prevented by the attachment of the reinforcing tape.

According to a third aspect of the present invention, the one air chamber and the other air chamber are formed as independent air chambers, and each of the air chambers is connected before connecting the two air chambers. Air is supplied from a supply / exhaust port provided for each, and the airtightness of both air chambers is inspected. Therefore, before connecting one end of one air chamber to the outer periphery of the other air chamber, the connection structure of the air chambers supplies air from the air supply / exhaust ports of both air chambers. It is possible to perform an airtight inspection, whereby the airtight inspection can be easily performed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 3 to 5 show a connection structure of air chambers according to the present invention. This connection structure is, for example, the air column structure 2 of the air tent 200 shown in FIGS.
The air column is used for connecting the air columns composing 00 ′, and as shown in FIG. 2 and FIG. Connect at right angles.

One air chamber 1 is formed by using a rubber cloth a in which both front and back surfaces of a base cloth are covered with rubber layers, and becomes a substantially cylindrical air column when inflated. Further, the other air chamber 2 is a columnar air column formed using a rubber cloth a similarly to the air chamber 1 described above, and has a diameter substantially equal to or somewhat larger than that of the air chamber 1. It is. When used in the air chamber structure 200 ′ of the air tent 200 as described above, the air chamber 2 is configured as a part of a substantially arched air column, and one end of the air chamber 1 is formed with respect to the outer peripheral surface thereof. Parts are connected (FIG. 3). Also,
In the case of the air chamber structure 200 ', the other end of the air chamber 1 is bonded to the peripheral surfaces of the adjacent arch-shaped air chambers 2 and 2' (FIG. 2).

The air chamber 1 is formed by forming a rubber band cloth a cut into a wide band into a cylindrical shape, and joining by overlapping both side edges thereof, as shown in FIG. Constitute. The edge on one end side of the rubberized cloth a was cut into a waveform so as to draw a sine carp as shown in FIG. 5-a, and the rubberized cloth a was formed into a cylindrical shape as described above. In this case, the edge of the opening serving as one end of the air chamber 1 is configured to be concavely curved in an arc shape when viewed from the side. The arc of the opening at one end of the air chamber 1 is set so as to substantially coincide with the arc of the outer peripheral surface of the air chamber 2 described later.

A cover cloth 3 is applied to the opening at one end of the air chamber 1 having a cylindrical shape as described above to close the opening. The cover cloth 3 is cut into a substantially elliptical shape using a rubber cloth a, and an adhesive margin 3a is formed around the outer cloth along the periphery of the one end of the air chamber 1 along the opening edge. Are formed with a substantially constant width (FIG. 5-b). Cover cloth 3 described above
Is brought into close contact with the opening edge of one end of the air chamber 1 which is concavely curved in a substantially arc shape as viewed from the side. At this time, the protruding portion of the airtight tape 4 stuck along the inner surface of the opening of one end of the air chamber 1 is brought into close contact with the opening edge of one end of the air chamber 1 as described above. Are sequentially adhered along the outer peripheral portion of the first member to maintain the airtightness of the joint portion between the first and second members.

At the same time, the cover cloth 3 is provided with an adhesive margin 3a formed along the outer periphery of the air chamber 1 along the opening edge.
And bonded back (FIG. 5C). That is, the cover cloth 3 is cut one size larger than the opening at one end of the air chamber 1. In the above state, the opening at one end of the air chamber 1 is closed by the cover cloth 3. Then, as shown in FIG. 5C, the closed surface is adhered in a concave curved shape along the shape of the opening edge of one end of the air chamber 1 by the cover cloth 3, and the surface is used as an adhesive surface 3b. Be composed. The bonding surface 3b
Are in close contact with the outer peripheral surface of the other air chamber 2 in shape conformity. Further, the opening edge of one end of the air chamber 1 in the above state is joined by the bonding margin 3a of the cover cloth 3 and the airtight tape 4 inside the air chamber 1 while being sandwiched from both front and back surfaces. (FIG. 4). Further, communication holes 31 and 2 are provided at the center of the cover cloth 3 and at the outer peripheral surface of the air chamber 2 corresponding to the center.
1 are opened, and both air chambers 1 and 2 are connected to each other through the two communication ports 31 and 21 in the shape of one air chamber.

The adhesive surface 3b at one end of the air chamber 1 configured as described above is entirely coated with an adhesive, and is adhered to a predetermined portion of the outer peripheral surface of the other air chamber 2 to be completely adhered ( FIG. 5-c, FIG. 4). As a result, the end of the air chamber 1 is connected to the outer peripheral surface of the air chamber 2 at a substantially right angle. As described above, a band-shaped reinforcing tape 5 made of a rubber cloth or a rubber sheet is adhered along the joint at one end of the air chamber 1 connected to the outer peripheral surface of the air chamber 2. The reinforcing tape 5 covers the joint between the air chambers 1 and 2 and the bonding margin 3a of the cover cloth 3 that is folded back and adhered to the outer peripheral surface along the opening edge of one end of the air chamber 1 so as to cover the entire area. This is affixed (FIG. 4). Further, as shown in FIG. 4, the other end of the air chamber 1 is entirely opposed to the adjacent air chamber 2 ′ or the air chamber 2 as in the case of the above-described one end of the air chamber 1. Glue it. The communication ports 31 and 21 as described above are not opened at the other end of the air chamber 1. Therefore, there is no communication between the other end of the air chamber 1 and the adjacent air chamber 2 '(2), and both the air chamber 1 and the adjacent air chamber 2' (2) are independent air chambers.

As described above, the reinforcing tape 5 stuck along the joint between one end of the air chamber 1 and the outer peripheral surface of the air chamber 2 adheres the outer peripheral surface of the air chamber 2 to one end of the air chamber 1. The surface 3b is prevented from gradually peeling off from the outer peripheral side. The reinforcing tape 5 together with the airtight tape 4 and the bonding surface 3b of the cover cloth 3 can improve the bonding strength at the same bonding part, and at the same time, cover all the bonding margin 3a of the bonding part and the cover cloth 3. Improve the appearance. Further, as described above, the reinforcing tape 5
As a result, by covering all of the bonding margin 3a of the cover cloth 3 which is folded back and adhered to the outer peripheral surface along the opening edge of one end of the air chamber 1, the airtight leak is temporarily made to the bonding margin 3a of the cover cloth 3. When air leakage occurs, airtight leakage from the same part can be prevented.

By the way, the air chamber 1 and the air chamber 2 connected as described above are in a state of a single air chamber before connection. The air chamber 2 is provided with a supply / exhaust port (not shown) at an appropriate position near the grounding portion, and the communication port 21 is not opened until the airtightness inspection is performed. Then, after performing airtightness inspection by supplying air from the air supply / exhaust port (not shown), the communication port 21 is opened. If airtightness leaks in the airtightness inspection at this stage, the air
Leaks from any of the above locations, the hermetic leak is repaired in advance. On the other hand, in the air chamber 1, the communication port 31 is opened from the beginning, and when connecting to the air chamber 2, the communication ports 31 and 21 are opened.
Then, the end surface on the side of the cover cloth 3 is bonded to the outer peripheral surface of the air chamber 2 as described above. After the two air chambers 1 and 2 are connected as described above, air is supplied again from the air supply / exhaust port (not shown) provided in the air chamber 2 and the air tightness of the connected two air chambers 1 and 2 is checked. . As described above, since the airtightness inspection of the air chamber 2 has already been completed, if airtightness leaks at this stage, it is understood that there is a cause of the airtightness leak at the connection portion on the air chamber 1 side. In the above embodiment, the air supply / exhaust ports (not shown) are provided only on the air chamber 2 side. However, the air supply / exhaust ports (not shown) are provided on both air chambers 1 and 2, respectively. , 2 may be subjected to an airtight inspection for each of the air chambers 1, 2.

As described above, the cover cloth 3 is provided at the opening edge of one end of the air chamber 1.
The adhesive allowance 3a provided on the outer peripheral portion of the air chamber 1
The operation of folding back and bonding to the outer peripheral surface along the opening edge of the one end can be efficiently performed by using a jig c as shown in FIG. The jig c is mounted and supported on the upper end of a vertically extending column c1. Also, the above-mentioned jig c
Are formed in a circular shape in a plan view so as to fit into the air chamber 1 exactly. The upper surface of the jig c has a concave curved adhesive surface 3b formed by a lid cloth 3 closing an opening at one end of the air chamber 1.
It is formed so as to be substantially arcuate in side view so as to conform to the shape. That is, the shape of the jig c is
The air chamber 1 is formed so as to conform to the concave shape of one end of the air chamber 1 closed by the cover cloth 3.

When the opening of one end of the air chamber 1 is closed by the cover cloth 3 using the jig c, one end of the air chamber 1 is fitted to the outer periphery of the jig c (one end of the air chamber). The jig is placed inside the part), and the semicircular opening edge is aligned along the peripheral edge of the arc surface on the upper surface of the jig c (FIG. 6). At this time, an airtight tape 4 is adhered along the inner peripheral surface of the opening edge at one end of the air chamber 1, and half of the airtight tape 4 is projected from the opening edge. Further, the protruding portion of the airtight tape 4 is temporarily fixed in a state of being folded into the upper surface side of the jig c, and the upper surface of the jig c is covered with the cover cloth 3 so as to cover one end of the air chamber 1. Close the opening edge. In this state, the lid cloth 3 is placed along an arcuate surface of the upper surface of the jig c which is exposed so as to fill the opening at one end of the air chamber 1. Next, the protruding portion of the airtight tape 4 folded on the upper surface of the jig c and the inner surface of the cover cloth 3 are pressed and adhered. Further, an adhesive is applied to the bonding margin 3a of the cover cloth 3 protruding from the opening edge of the one end of the air chamber 1 to the outer peripheral side and the outer peripheral surface along the opening edge of the one end of the air chamber 1, and dried for a predetermined time. After that, the bonding margin 3a is folded back and bonded to the outer peripheral surface along the opening edge at one end of the air chamber 1 (FIG. 6).

As described above, by performing the work of bonding the cover cloth 3 to the opening at one end of the air chamber 1 using the jig c, the work of attaching the airtight tape 4 to the inner surface of the cover 3, Work to make the cover cloth 3 adhere in a state of being concavely bent along the opening edge of one end of the chamber 1, and further, fold back the bonding margin 3 a of the cover cloth 3 to the outer peripheral surface along the opening edge of one end of the air chamber 1. The work of bonding can be easily performed using the shape and the holding function of the jig c, so that the efficiency of the work can be greatly improved.

In the air chamber connection structure configured as described above, the cover cloth 3 for closing the opening at one end of one air chamber 1 is provided.
By bonding the concave curved adhesive surface 3b formed by the above to the entire outer peripheral surface of the other air chamber 2, a strong bonding force can be exhibited. The air chamber 1 joined to the outer peripheral surface of the air chamber 2 has an adhesive surface 3b of the cover cloth 3 entirely adhered to the peripheral surface of the air chamber 2 and an opening at one end of the air chamber 1. The air chamber 1 is joined by the airtight tape 4 bonded along the inner surface of the opening edge and the bonding margin 3a provided on the outer peripheral portion of the cover cloth 3 so as to be sandwiched from both front and back sides. The joining force at the opening edge at one end can be effectively improved. Furthermore, since the reinforcing tape 5 is adhered along the joint between the one end of the air chamber 1 and the outer peripheral surface of the air chamber 2, the adhesive surface 3b of the cover cloth 3 is prevented from peeling from the outer peripheral edge. In addition to the bonding margin 3a of the cover cloth 3, the joining strength of the opening edge at one end of the air chamber can be further strengthened. In addition, according to the gist of the present invention, the reinforcing tape 5 does not necessarily have to be attached, and may be omitted.

Next, the air chamber connection structure shown in FIG. 7 will be described. The connection structure of the air chamber shown in FIG. 7B is configured similarly to the connection structure of the air chamber shown in FIG. Air chamber 1
A rubber pedestal 6 is provided on the inner surface side. This pedestal 6
An opening is formed in the shaft core portion, and the cylindrical body 6a is fitted and fixed in the opening. As shown in FIG. 7A, a substantially cylindrical valve d including a one-way valve d1 is detachably screwed into the cylindrical body 6a.

The valve d is for checking the airtightness of the air chamber 1. Before connecting the air chamber 1 to the air chamber 2, the valve d is inserted into the cylindrical body 6 a of the pedestal 6. Attach by screwing in from the outside. The opening of the valve d on the inner side of the air chamber 1 functions to allow the flow of the air injected from the inlet d2 of the valve d and prevent the air from flowing out of the air chamber 1. A directional valve d1 is provided. Before the air chamber 1 is connected to the air chamber 2, air is injected from the inlet d2 of the valve d mounted as described above to expand the air chamber 1, and an airtight inspection of the air chamber 1 is performed. (FIG. 7-a). Also,
When performing the airtight inspection, the inlet d2 of the valve d is closed by the lid d3. Note that the airtightness of the air chamber 2 is completed before opening the communication hole 21 as in the case described above.

When the airtight inspection of the air chamber 1 and the air chamber 2 is completed as described above, the valve d is removed from the cylinder 6a of the pedestal 6, and then the opening of the cylinder 6a of the air chamber 1 is closed. The end face of the air chamber 1 on the side of the cover cloth 3 is bonded to the outer peripheral surface of the air chamber 2 in the same manner as described above in a state where the communication port 21 is aligned with the second communication port 21. After connecting both air chambers 1 and 2 as shown in FIG. 7B, air is supplied from a supply / exhaust port (not shown) provided in the air chamber 2, and the air chambers 1 and 2 are connected. Perform an airtight inspection. As described above, since the airtight inspection of the air chamber 1 and the air chamber 2 has already been completed, if an airtight leak occurs at this stage, the cause of the airtight leak at the connection portion between the air chamber 1 and the air chamber 2 will be described. The airtight leak can be easily found. The valve d serving as the air supply / exhaust port on the air chamber 1 side is:
This is very reasonable because it can be used repeatedly for airtightness inspection of the air chamber 1.

In the connection structure of the air chambers described above, the connection angle of the two air chambers 1 and 2 to be connected is free. For example, even when the air chambers 1 and 2 are at right angles or in a state where the air chambers 1 and 2 are slightly inclined. You may connect. In this case, it is necessary to slightly change the shape of the opening edge at one end of the one air chamber and the outer shape of the cover cloth, but the other can be coped with by the same configuration as the above-described air chamber connection structure. Further, the use of the air chamber connection structure of the present invention described above is not limited to the connection of the air chambers constituting the air column structure of the air tent, and the end of one air column is connected to the outer periphery of the other air column. Any existing connection structure of the air chamber connected to the surface may be used. For example, both ends of a lateral air chamber erected between left and right sides of a rubber boat cylinder may be used as a connection structure for connecting to outer peripheral surfaces of air chambers on both left and right sides of the same cylinder ( Not shown).

[0033]

As described above, according to the present invention, one of the air chambers is formed so that the opening edge at one end thereof is substantially arcuate in a side view, and the lid cloth is formed along the opening edge at the one end. And the bonding margin provided along the outer peripheral edge of the cover cloth is folded back and adhered to the outer peripheral surface of the air chamber along the opening edge of one end of the one air chamber, and the opening inside the one air chamber is opened. Adhering an airtight tape along the inner peripheral surface along the edge and the inner surface of the adhesive portion of the lid cloth, as a concave curved adhesive surface that makes the closed surface made of the lid cloth adhere to the outer peripheral surface of the other air chamber In this case, the adhesive surface is entirely adhered to the outer peripheral surface of the other air chamber. Therefore, the cover cloth that closes the opening at one end of the one air chamber is configured as a concave curved adhesive surface that closely matches the outer peripheral surface of the other air chamber in shape, and this adhesive surface is used as the other air chamber. By completely bonding to the outer peripheral surface of the chamber, one end of one air chamber is firmly connected to the outer peripheral surface of the other air chamber through a wide bonding area, and the rigidity at the connection portion Can be rationally improved, and swing deformation and the like generated between the two air chambers can be effectively reduced. Further, the bonding force of one air chamber to the outer peripheral surface of the other air chamber is determined by the airtight tape along the inner peripheral surface along the opening edge inside the one air chamber and the inner surface of the adhesive portion of the cover cloth. The adhesive strength is combined with the adhesive strength of the cover cloth that is folded back and adheres to the outer peripheral surface of the air chamber along the opening edge, and one of the air chambers is formed by the bonding allowance of the airtight tape and the cover cloth. Are bonded in such a manner as to sandwich the opening edge portion from the front and back, and the bonding strength between the two air chambers can be remarkably improved by the bonding strength of both.

In the air chamber connection structure according to the second aspect of the present invention, a reinforcing tape is applied along a bonding portion between the outer peripheral surface of one end of the air chamber and the outer peripheral surface of the other air chamber. The reinforcing tape is configured to cover the joint between the two air chambers and the bonding margin of the lid cloth folded back and adhered to the outer peripheral surface along the opening edge of one end of the one air chamber. Therefore, the reinforcing tape improves the bonding strength at the bonding portion, and effectively prevents the bonding between the bonding surface of the cover cloth and the outer peripheral surface of the other air chamber from peeling off. At the same time, the joint part of both air chambers exposed in the same part and the adhesion allowance of the cover cloth are completely covered to improve the appearance. Also,
If the reinforcing tape is provided with airtightness, all of the bonding margin of the cover cloth folded back and adhered to the outer peripheral surface along the opening edge of one end of one air chamber is covered. In the case where an airtight leak occurs in the bonding margin portion, it is possible to reliably prevent the airtight leak by applying the reinforcing tape.

According to a third aspect of the present invention, the one air chamber and the other air chamber are configured as independent air chambers, and each of the air chambers is connected before the two air chambers are connected. Air is supplied from the air supply / exhaust ports provided for each air chamber, and the airtightness of both air chambers is inspected. It is possible to perform an airtight inspection for each individual air chamber. Therefore,
Compared to the case where both air chambers are connected and the airtightness inspection is performed in a state where they are connected in a single air chamber, the airtightness inspection of both air chambers can be easily performed in a relatively small state before connection, and Even when an airtight leak is found, the location of the airtight leak can be specified for each air chamber, so that the work of finding the airtight leak can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an air tent configured using the air chamber connection structure of the present invention.

FIG. 2 is an exploded perspective view showing an air chamber structure of the air tent.

FIG. 3 is a perspective view showing a connection portion between the two air chambers in which one end of one air chamber is connected to the outer peripheral surface of the other air chamber in the air chamber structure.

FIG. 4 is a longitudinal sectional view showing a connection portion between both air chambers.

FIG. 5A is a perspective view showing a state in which a rubber cloth is wound in a cylindrical shape, FIG. 5B is a perspective view showing a state in which a lid cloth is attached to an opening at one end of one air chamber, (C) A perspective view showing a state in which a concave curved bonding surface provided at one end of one air chamber is bonded to the outer peripheral surface of the other air chamber.

FIG. 6 is a front view showing a state in which a cover cloth is adhered to an opening at one end of one air chamber using a jig, and a part of the air chamber is cut away.

FIG. 7A is a longitudinal sectional view showing an end portion of an air chamber in a state where an airtightness inspection is performed with a valve attached thereto, and FIG. 7B is a connection portion in a state where both valves are connected with the valve removed. FIG.

FIG. 8 is a longitudinal sectional view showing a connection portion of a conventional air chamber connection structure.

FIG. 9 is a perspective view showing a conventional air tent and an air chamber structure.

[Explanation of symbols]

 a: Rubberized cloth c: Jig d: Valve 1 ... Air chamber 2 ... Air chamber 3 ... Lid cloth 3a ... Adhesive allowance 3b ... Adhesive surface 4. ..Airtight tape 5 ... Reinforcing tape

Claims (3)

[Claims] An air chamber connection structure for connecting the end of one rubber-coated cloth air chamber that expands in a substantially cylindrical shape to the outer periphery of the other rubber-coated cloth air chamber that expands in a substantially cylindrical shape. In the above, the one air chamber is formed in a substantially cylindrical shape by using a rubber cloth, and an opening edge of one end thereof is formed to have a substantially arc shape in a side view, and is formed along an opening edge of the one end portion. The cover cloth cut into a substantially elliptical shape is brought into close contact, and the bonding margin provided along the outer peripheral edge of the cover cloth is folded back and adhered to the outer peripheral surface of the air chamber along one end opening edge of the one air chamber, and An airtight tape is stuck along the inner peripheral surface along the opening edge inside the one air chamber and the inner surface of the adhesive portion of the lid cloth, and the opening at one end of the air chamber is closed with the lid cloth. And the surface of the lid cloth is formed as a concave-curved adhesive surface for making the surface of the lid cloth adhere to the outer peripheral surface of the other air chamber. An air chamber connection structure in which the surface is entirely adhered to the outer peripheral surface of the other air chamber. 2. An adhesive margin along an outer peripheral surface of one end of one air chamber and a joint between the outer peripheral surface of the other air chamber and
A reinforcing tape is applied, and the reinforcing tape covers the joint between the two air chambers and the bonding margin of the lid cloth along the outer peripheral surface of one end of the one air chamber. Item 7. A connection structure for an air chamber according to Item 1. 3. One air chamber and the other air chamber are each configured as an independent air chamber, and before connecting these two air chambers,
3. The air chamber connection structure according to claim 1, wherein air is supplied from air supply / exhaust ports provided for each of the air chambers, and the airtightness of both air chambers is inspected.