JP2001082790A - Flexible duct connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for connecting a flexible duct easily and surely while achieving cost reduction through simple structure. SOLUTION: A flexible duct 50 is coupled with a coupling section 11 and an air conditioning apparatus is provided with an apparatus side tubular body 12. The flexible duct 50 is fitted over the other end of the coupling section 11 and tightened from the outside to integrate the coupling section 11 and the flexible duct 50. Since the coupling section 11 can be coupled with the air conditioning apparatus through an operation for simply inserting the coupling section 11 coupled with the flexible duct 50 into the apparatus side tubular body 12, connection workability is enhanced. Furthermore, cost reduction can be achieved because the coupling section 11 being coupled with the flexible duct 50 has simple structure and it can be integrated easily with the flexible duct 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible duct connection structure for connecting a flexible duct used for supplying air conditioning gas to other air conditioning equipment.

[0002]

2. Description of the Related Art A flexible duct for supplying air conditioning equipment to an air conditioning equipment such as an air outlet is connected to the air conditioning equipment via a predetermined connection structure. Conventionally, when connecting a flexible duct, a method such as tightening with a band, fixing with adhesive aluminum tape, or screwing with a screw from the outside of the flexible duct covering the connection opening part of the air conditioning equipment Because of the adoption of, complicated work had to be performed in the narrow space behind the ceiling where the air conditioning equipment was installed,
It was troublesome. For this reason, various flexible duct connection structures capable of efficiently and quickly connecting such flexible ducts have been proposed. FIG. 9 shows an example of such a conventional flexible duct connection structure. FIG. 9 is a sectional view showing a connection state of a conventional flexible duct connection structure.

In FIG. 9, the conventional flexible duct connection structure is formed of a substantially cylindrical body which expands from one end side opening to the other end side opening. A flange portion 101a is formed, the mounting flange portion 101a is engaged with a predetermined air conditioning device 60, and a device-side cylindrical body disposed to communicate the inside of the substantially cylindrical body with the inside of the air conditioning device 60. 101 and a plurality of predetermined portions at one end of the device-side cylindrical body 101 which are formed of a substantially plate-shaped metal body having one end bent substantially U-shaped and the other end bent like a hook. To the locking member 102 formed by engaging the substantially U-shaped bent portions with the other end of the substantially plate-shaped body to the inside of the opening of the device-side cylindrical body 101, and to the end of the flexible duct 50. And a joint 110 for connection to be mounted. A plurality of engaging members disposed at the end portion 10
In this configuration, the joint portion 110 is press-fitted and connected between the two to connect the flexible duct 50 and the air conditioning equipment 60.

A plurality of fixing projections 101b are formed at a plurality of locations on the outer periphery of one end of the device-side cylinder 101 so as to project therefrom. Further, an engagement hole (not shown) for engaging with the fixing projection 101b is formed in a substantially U-shaped bent portion of the locking member 102. By engaging the engaging hole of the locking member 102 with the fixing convex portion 101b, the locking member 102 and the device-side cylinder 101 can be surely integrated.

[0005] The joint 110 attached to the end of the flexible duct 50 is formed of a substantially cylindrical body made of metal.
An outer cylinder formed at one end of the substantially cylindrical body with a stepped portion 111a that engages with the locking member 102, and is expanded from the intermediate portion to the other end to an inner diameter equal to the outer diameter of the flexible duct 50. Body 111 and flexible duct 50
A substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct 50 is formed at one end of the substantially cylindrical body to have a diameter larger than the inner diameter of the flexible duct 50, and a stopper 112a is formed at the other end. And an inner cylindrical body 112 in which a flange portion 112b protruding in a flange shape is formed.

The flexible duct 5 of the joint 110
First, the flexible duct 50 is covered from one end of the inner cylindrical body 112 deeper than the stopper portion 112a, and the outer periphery of the flexible duct 50 is tightened with a fixing band 113 to thereby secure the flexible duct 50.
And the inner cylinder 112 are fixed in an airtight state. Thereafter, the flange 112b of the inner cylinder 112 is connected to the outer cylinder 111.
The inner cylindrical body 112 and the outer cylindrical body 111 are fixed to each other by bonding or riveting to an intermediate enlarged diameter portion to form an integrated joint portion 110.

In the above-described conventional flexible duct connection structure, the joint 110 is engaged with the plurality of locking members 102 only by pressing and inserting the joint 110 of the flexible duct 50 into the opening on one end side of the device side cylinder 101. Locking material 10
The connection between the flexible duct 50 and the air-conditioning equipment in a reliable airtight state is easily and quickly completed.

On the other hand, when another flexible duct is extended and connected as the air conditioning device connected to the flexible duct, connection has conventionally been made via a connection nipple. FIGS. 10 and 11 show an example of such another conventional flexible duct connection structure. FIG. 10 is a schematic configuration perspective view of another conventional flexible duct connection structure, and FIG. 11 is a connection explanatory view of another conventional flexible duct connection structure.

In each of the above drawings, another conventional flexible duct connection structure is formed of a metal-made substantially cylindrical body, and locking members 102 are provided at four positions at both open ends of the substantially cylindrical body.
Is provided with a plurality of connection nipples 120 partially protruding inside the opening, and a connection joint portion 110 attached to the end of the flexible duct 50.
In this configuration, the joint portion 110 at the end of the flexible duct 50 is press-fitted and connected between the plurality of locking members 102 at both ends to extend and connect the flexible duct 50. The joint 110 attached to the end of the flexible duct 50 has exactly the same structure as the conventional joint.

[0010] In the other conventional flexible duct connection structure described above, the joint 1 of the flexible duct 50 is also provided.
By simply pressing each of the joints 10 into both openings of the connection nipple 120, the joint portion 110 engages with the plurality of locking members 102 and is held between the locking members 102, and each flexible duct 50 is connected to the connection nipple 120. And the flexible ducts 50 can be easily and quickly connected to each other.

[0011]

Since the conventional flexible duct connection structure was constructed as described above,
Although the connection between the flexible duct 50 and the air conditioning equipment 60 or the connection itself between the flexible ducts 50 via the connection nipple 120 can be easily and quickly performed, the joint portion 110 attached to the flexible duct 50 for connection includes: Since it is composed of two parts, the structure is relatively complicated, and it takes a lot of time to mount, so that there is a problem that the cost is high in both material and work.

In addition, since the connection nipple 120 is required for connecting the flexible ducts 50 to each other, the number of components increases, which also has a problem that the cost increases. Furthermore, in the connection nipple 120, when cold air flows inside, the outside is also cooled by heat transfer to a portion in contact with the inside cold air, and dew condensation may occur on this outside portion. For example, measures such as heat insulation and prevention of dew condensation by applying electrostatic flocking or the like are indispensable, and there is a problem that the structure is complicated and the cost is further increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a flexible duct connection structure in which a flexible duct can be easily and reliably connected, and the cost can be reduced with a simple structure. .

[0014]

A flexible duct connection structure according to the present invention is formed of a substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is provided with a flange having a predetermined width toward the outer periphery. A flange is formed by protruding in a shape, and a plurality of portions at the other end of the substantially cylindrical body are protruded outward at a predetermined height in a substantially protruding shape to form a protrusion, and an intermediate portion between the flange and the protrusion is formed. An annular packing having a predetermined width is disposed along the outer peripheral surface of the substantially cylindrical body, and the other end of the substantially cylindrical body is covered with an end of the flexible duct, and is integrated with the flexible duct in a state of being in contact with the entire circumference of the packing. And a fixed portion at a plurality of locations around a connection opening formed in a predetermined air conditioning device with a diameter larger than the outer diameter of the flange portion and smaller than the outer diameter of the packing of the joint portion, and inward of the opening. With a plurality of locking members protruding With the insertion of the one end of the joint portion inside the connection opening of the air conditioning equipment, one end of the joint portion engages with the plurality of locking members and is held between the locking members, The periphery of the opening of the connection opening and the packing of the joint are in close contact with each other all around, and the flexible duct and the air-conditioning equipment are air-tightly connected.

As described above, in the present invention, the joint portion is connected to the flexible duct, and the air conditioning equipment is provided with a plurality of locking members, respectively. By tightening the joint from the flexible duct, the flexible duct can be connected to the flexible duct only by an easy operation of pressing and inserting the joint integrated with the flexible duct inside the connection opening of the air conditioning equipment. Connection with air conditioning equipment becomes possible, connection workability is excellent, and the structure of the joint connected to the flexible duct is simple and easy to integrate with the flexible duct. Can also save labor and greatly reduce costs.

Further, the flexible duct connection structure according to the present invention is formed of a substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is protruded to the outer peripheral side in a flange shape of a predetermined width. A flange portion is formed, and a plurality of portions of the other end portion of the substantially cylindrical body are protruded outward to a substantially protruding shape at a predetermined height to form a protruding portion. An annular packing having a predetermined width is provided along the peripheral surface, and a flexible duct end is placed on the other end of the substantially cylindrical body, and the joint is integrated with the flexible duct in a state of being in contact with the entire circumference of the packing. And one end portion is formed of a substantially cylindrical body having an inner diameter larger than the outer diameter of the flange portion of the joint portion and smaller than the outer diameter of the packing, and the other end portion is attached to a connection opening of a predetermined air conditioning device, Multiple at one end of a generally cylindrical body And a device-side cylinder having a plurality of locking members protruding toward the inside of the substantially cylindrical body fixed to a place, wherein the insertion of one end of the joint portion into one end opening of the device-side cylinder results in a joint portion. One end of the flexible duct is engaged with the plurality of locking members and held between the respective locking members, and one end of the device-side cylindrical body and the packing of the joint portion are in close contact with each other all around. And the air conditioning equipment are airtightly connected.

As described above, in the present invention, the joint portion is connected to the flexible duct, and the device-side cylinders are respectively arranged in the air conditioning equipment, and the flexible duct covering the other end portion of the joint portion is attached from the outside. By tightening and integrating the joint and the flexible duct, the flexible duct and the predetermined air conditioning equipment can be connected only by an easy operation of pressing and inserting the joint with the flexible duct inside the device side cylinder. Connection is possible, excellent connection workability, and the structure of the joint connected to the flexible duct is simple and can be easily integrated with the flexible duct, and the connection work between the joint and the flexible duct can be labor-saving, and Significant cost reduction can be achieved.

In the flexible duct connection structure according to the present invention, if necessary, a notch formed by removing a flange-shaped protruding portion over a predetermined dimension larger than the locking material is provided in the flange of the joint portion. Are arranged in plural in accordance with the arrangement interval. As described above, in the present invention, the notch portion is formed in the flange portion of the joint portion in accordance with the arrangement interval of the locking material, and when the joint portion once connected is removed, the notch portion is aligned with the position of the locking material. By releasing the restraining state of the locking portion with respect to the flange portion, the joint portion is pulled out as it is, and it is not necessary to pull out the joint portion with a strong force, thereby greatly improving the removal workability.

Further, the flexible duct connection structure according to the present invention is formed of a substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is protruded to the outer peripheral side in a flange shape of a predetermined width. A flange portion is formed, and a plurality of portions of the other end portion of the substantially cylindrical body are protruded outward to a substantially protruding shape at a predetermined height to form a protruding portion. An annular packing having a predetermined width is provided along the peripheral surface, and a flexible duct end is placed on the other end of the substantially cylindrical body, and the joint is integrated with the flexible duct in a state of being in contact with the entire circumference of the packing. A plurality of cutouts in which a flange-shaped protruding portion is removed over a predetermined dimension are provided at predetermined intervals in the circumferential direction, and a plurality of cutouts at the same circumferential predetermined interval as the cutouts are provided on the flange of the joint portion. Connect the flange-shaped protrusion to the cylindrical axis of the joint. A plurality of engaging claw portions cut and raised are provided, the notch portion and the engaging claw portion are overlapped with the joint portion facing another joint portion, and the engaging claw portion is inserted into the notch portion. In this state, the joint is rotated to engage the engaging claw with the flange adjacent to the notch into which the engaging claw is inserted, and the two joints are integrally connected to connect the flexible ducts to each other. Is what you do.

As described above, in the present invention, a plurality of notches and engaging claws are provided in the flange of the joint, respectively.
When connecting the flexible ducts to each other, the joint portion is rotated from a state in which the notch portion and the engaging claw portion of the two joint portions are overlapped with each other, and the engaging claw portion and the flange portion are engaged with each other to form a joint. By connecting the portions, the two joint portions can be directly connected to connect the flexible ducts to each other, so that a connection nipple is not required, the configuration required for the connection can be simplified, and the cost can be reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of the Present Invention) Hereinafter, a flexible duct connection structure according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the joint portion and the device-side cylinder in the flexible duct connection structure according to the present embodiment. FIG. 2 is an end view of one end side of the joint portion in the flexible duct connection structure according to the present embodiment. FIG. 3 is an end view of one end side of the device-side cylindrical body in the flexible duct connection structure according to the present embodiment, and FIG. 4 is a connection state explanatory diagram of the flexible duct connection structure according to the present embodiment.

In each of the drawings, the flexible duct connection structure according to the present embodiment is formed of a metal substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct 50, and one end of the substantially cylindrical body is connected to the outer peripheral side. A flange 11a is formed by protruding in a flange shape having a predetermined width, and a plurality of portions at the other end of the substantially cylindrical body are partially protruded outward by a predetermined height to form a protrusion 11b. An annular packing 11c having a predetermined width is disposed along the outer peripheral surface of the substantially cylindrical body in the middle of the projection 11b, and a joint portion 11 formed by integrally connecting a flexible duct 50 to the other end of the substantially cylindrical body; The portion is formed of a substantially cylindrical metal body having an inner diameter larger than the outer diameter of the flange 11a of the joint portion 11 and smaller than the outer diameter of the packing 11c,
A plurality of fixing projections 1 are provided at a plurality of locations on the outer periphery on one end side of the substantially cylindrical body.
2a is formed so as to protrude, and at the other end side, a mounting flange portion 12b whose end portion is protruded to the outer peripheral side in a predetermined width flange shape is formed, and the mounting flange portion 12b is fixed to a predetermined width. A device-side tubular body 12 integrally attached to an opening of an air-conditioning device (not shown), and one end of the joint portion 11 is inserted into one end-side opening of the device-side tubular body 12 to be integrally formed. In this configuration, the flexible duct 50 and the air-conditioning device are connected via the joint portion 11 and the device-side cylindrical body 12 by engaging and holding.

The joint portion 11 is provided with a flexible duct 5
The joint between the joint 11 and the flexible duct 50 is made by first connecting the flexible duct 50 to the other end and the packing 11c to the end of the flexible duct.
And cover the entire circumference until it is in close contact. The outer periphery of the end portion of the flexible duct 50 covered with the fixed band 1 is positioned at an intermediate position between the protrusion 11b and the packing 11c.
By tightening using 4, the flexible duct 50 is fixed integrally so as not to come off from the joint portion 11, and
Airtightness between the flexible duct 50 and the joint portion 11 is ensured. Note that, other than the tightening by the fixing band 14, a method of fixing with an adhesive aluminum tape or the like may be adopted.

The device-side cylindrical body 12 is provided with four locking members 13 which respectively engage with fixing projections 12a formed at four locations on the outer periphery of one end side. And one end of the joint portion 11 inserted into the holding member 13 is detachably held between the locking members 13. The locking material 13
Is formed of an elastic metal substantially plate-like body, one end of the substantially plate-like body is bent substantially U-shaped, and the other end is bent like a hook, An engagement hole (not shown) for engaging the fixing projection 12a of the device-side cylindrical body 12 is formed in the bent portion. This locking material 13
The one end of the device-side cylinder 12 is substantially U-shaped while engaging the fixing projection 12a of the device-side cylinder 12 with the engagement hole.
Each is mounted so as to be sandwiched by the bent portions of the letter shape, and the other end is projected inside the opening of the device-side cylindrical body 12. In addition,
The locking member 13 is made of metal, but is not limited to this, and may be made of another elastic material such as a synthetic resin molded body.

Next, a connection operation using the flexible duct connection structure based on the above configuration will be described. The joint 11 to which the flexible duct 50 is connected is pressed and inserted into the opening on one end side of the device-side cylindrical body 12 with the flange 11a side first (see FIG. 4A). By pressing and inserting the joint portion 11 on the side of the flange 11a, each of the locking members 13 in contact with the flange 11a
The protruding other end is once pushed outward (FIG. 4).
(See (B)). Further, at the same time as the flange portion 11a further advances and crosses the position of the locking member 13, the locking member 13 is released from the restraint by the flange portion 11a and returns inside by elastic force, and the joint portion 1
1 while holding the outer periphery between the locking members 13 and
a The joint 11 can be fixed by preventing the joint 11 from coming out in the opposite direction by the restraint on the back side (FIG. 4).
(C)).

At this time, the dimension from one end of the device-side cylinder 12 to the protruding end of the locking member 13 is slightly larger than the dimension from the flange 11a of the joint 11 to the packing 11c. Therefore, the packing 11c of the joint 11 strongly adheres to the end of the device-side cylinder 12 while being deformed, and maintains the airtightness between the joint 11 and the device-side cylinder 12. The packing 11c on the outer periphery of the joint portion 11 is
Since the zero end portion and the end surface of the device-side cylinder 12 are in close contact with each other, the space between the flexible duct 50 and the device-side cylinder 12 is also airtight.

As described above, in the flexible duct connection structure according to the present embodiment, the flexible duct 50 and the predetermined portion are connected to the flexible duct 50 only by an easy operation of pressing and inserting the joint portion 11 integrated with the flexible duct 50 into the inside of the device side cylinder 12. The connection with the air conditioning equipment is possible, and the structure of the joint portion 11 connected to the flexible duct 50 is simple and can be easily integrated into the flexible duct 50, so that the cost can be significantly reduced.

In the flexible duct connection structure according to the above-described embodiment, the flange 11a of the joint 11 is formed as a flange-shaped protrusion over the entire circumference. However, the present invention is not limited to this. As shown in the figure, a notch 11d in which a flange-shaped protrusion is removed over a predetermined width larger than the locking member 13 is
It is also possible to adopt a configuration in which a plurality of notches 11 d are provided when the joint portion 11 is pressed and inserted into the device-side cylindrical body 12. When the joint portion 11 is removed from the device side cylinder 12, the joint portion 11 is rotated to align the notch 11 d with the position of the locking member 13, and the flange of the locking portion 13 Part 1
When the joint portion 11 is pulled out as it is after releasing the restrained state with respect to 1a, it is not necessary to pull out the joint portion 11 from the device-side cylindrical body 12 with a strong force, and the detachability is greatly improved.

Further, in the flexible duct connection structure according to the above-described embodiment, the device-side cylinder 12 is formed of only a substantially cylindrical metal body. However, the present invention is not limited to this. It is also possible to form a heat insulating layer such as electrostatic flocking or flocking tape bonding, further improve the heat insulating property, reliably suppress the heat loss of conditioned air, and make it more difficult for dew condensation to occur, Does not adversely affect the surroundings.

Further, in the flexible duct connection structure according to the embodiment, the joint portion 11 is connected to the air-conditioning device via the device-side cylindrical body 12. However, the present invention is not limited to this, and FIG. As shown, the locking member 13 is provided in the connection opening 61 formed in the air-conditioning device 60, and the joint portion 11 is directly inserted into the connection opening 61 of the air-conditioning device 60 by pressing and connecting. Can be configured to
As in the above-described embodiment, the connection between the flexible duct 50 and the air conditioning equipment 60 is possible by only a simple pressing and inserting operation, and the workability is excellent.

In the flexible duct connection structure according to the above-described embodiment, the device side cylinder 12 is attached to the air conditioning device so that the flexible duct 50 can be connected to the air conditioning device. In addition, another device-side cylinder 12 is used as an air conditioning device to which the device-side cylinder 12 is attached, and the two device-side cylinders 12 are integrated into a connection nipple. 11 can be connected to connect the flexible ducts 50 to each other, and the flexible ducts 50 can be connected to each other only by an easy pressing and inserting operation.

(Second Embodiment of the Present Invention)
Will be described with reference to FIGS. 7 and 8. FIG. FIG. 7 is an end view of one end side of the joint portion in the flexible duct connection structure according to the present embodiment, and FIG. 8 is a connection state explanatory diagram of the flexible duct connection structure according to the present embodiment.

In each of the drawings, the flexible duct connection structure according to this embodiment is the same as that of the first embodiment.
While having a joint 11 in which the flexible duct 50 is integrally connected, the difference from the above is that the joint 11
In this configuration, the flexible ducts 50 are connected to each other by engaging and connecting them. The joint 11 has the same configuration as that of the first embodiment in connection with the flexible duct 50. In addition, the flange 11a has a flange-shaped protruding portion removed over a predetermined dimension at a predetermined circumferential interval at the flange 11a. Notch 1
1e, a plurality of joints 11 from the outermost peripheral position of the flange-shaped protruding portion at the same predetermined circumferential position as the notch 11e and at an intermediate position between the notches 11e.
The joint portion 11 is sandwiched by a cut formed continuously over a predetermined dimension along the outer periphery of the joint portion 11 up to the outer peripheral surface.
A plurality of engaging pawls 11f are provided in which a flange-shaped protruding portion of a predetermined size separated from the outer peripheral surface is raised in the cylindrical axis direction of the joint portion 11.

Next, a connection operation using the flexible duct connection structure based on the above configuration will be described. The joint portion 11 integrated with the flexible duct 50 is replaced with another joint portion 11 integrated with the flexible duct 50.
The notch 11d and the engaging claw 11f
Are respectively overlapped with each other, and the engaging claw 1
1f, the joint portion 11 is rotated, and the engaging claw 11f and the notch 11 into which the engaging claw 11f is inserted.
e and the flange 11a adjacent thereto are engaged. The engagement between the engaging claw 11f and the flange 11a allows the two joints 1
1 are integrally connected, and the flexible ducts 50 are connected in series.

Thereafter, if necessary, a process such as wrapping a heat insulating tape around the joint between the joint portions 11 is performed, so that the airtightness between the joint portions 11 can be further ensured. As described above, in the flexible duct connection structure according to the present embodiment, the notch 11e and the engaging claw 11f are provided at the end of the joint 11, and the joint 11 is directly connected when the flexible ducts 50 are connected to each other. Since connection and connection are possible, a conventional connection nipple is not required, the configuration required for connection can be simplified, and cost can be significantly reduced.

[0036]

As described above, according to the present invention, the joint portion is connected to the flexible duct, and a plurality of locking members are provided on the air conditioning equipment, respectively, and are covered on the other end of the joint portion. By tightening the flexible duct from the outside and integrating the joint and the flexible duct, the flexible duct can be flexibly formed by simply pressing and inserting the joint into the flexible duct inside the connection opening of the air conditioning equipment. The connection between the duct and the specified air-conditioning equipment becomes possible, the connection workability is excellent, and the structure of the joint connected to the flexible duct is simple and easily integrated with the flexible duct. This also has the effect of saving labor in connection with the device and greatly reducing costs.

Further, according to the present invention, the joint portion is connected to the flexible duct, and the device-side cylinders are respectively arranged in the air conditioning equipment, and the flexible duct covering the other end portion of the joint portion is attached from the outside. By tightening and integrating the joint and the flexible duct, the flexible duct and the predetermined air conditioning equipment can be connected only by an easy operation of pressing and inserting the joint with the flexible duct inside the device side cylinder. Connection is possible, and connection workability is excellent, and the structure of the joint part connected to the flexible duct can be easily and easily integrated with the flexible duct,
There is an effect that labor for connecting the joint portion and the flexible duct can be saved, and the cost can be significantly reduced.

Further, according to the present invention, a notch is formed in the flange of the joint portion in accordance with the arrangement interval of the locking material, and when the joint portion once connected is removed, the notch is formed by the locking material. When the position is adjusted to the position, the restrained state of the locking portion with respect to the flange portion is released, so that the joint portion is pulled out as it is, and it is not necessary to pull out the joint portion with a strong force, and the removal workability is greatly improved. Has an effect.

Further, according to the present invention, when a plurality of notches and engaging claws are respectively provided in the flange of the joint, and the flexible ducts are connected to each other, the notch and the notch of the two joints are connected. The joint portion is rotated from a state in which the engaging claw portion is overlapped with each other, and the joint portion is connected by engaging the engaging claw portion and the flange portion, so that the two joint portions are directly connected and flexible. Since the ducts can be connected to each other, a connection nipple is not required, and the configuration required for the connection can be simplified, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint portion and a device-side cylinder in a flexible duct connection structure according to a first embodiment of the present invention.

FIG. 2 is an end view of one end of a joint in the flexible duct connection structure according to the first embodiment of the present invention.

FIG. 3 is an end view of one end side of the device-side cylinder in the flexible duct connection structure according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating a connection state of the flexible duct connection structure according to the first embodiment of the present invention.

FIG. 5 is an end view of one end of a joint in a flexible duct connection structure according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a connection state of a flexible duct connection structure according to another embodiment of the present invention.

FIG. 7 is an end view of one end of a joint in a flexible duct connection structure according to a second embodiment of the present invention.

FIG. 8 is a diagram illustrating a connection state of a flexible duct connection structure according to a second embodiment of the present invention.

FIG. 9 is a sectional view showing a connection state of a conventional flexible duct connection structure.

FIG. 10 is a schematic configuration perspective view of another conventional flexible duct connection structure.

FIG. 11 is an explanatory view of a connection state of another conventional flexible duct connection structure.

[Explanation of symbols]

 11, 110 Joint part 11a Flange part 11b Projection part 11c Packing 11d, 11e Notch part 11f Engagement claw part 12, 101 Equipment side cylinder body 12a, 101b Fixing convex part 12b, 101a Mounting flange part 13, 102 Locking material 14, 113 Fixed band 50 Flexible duct 60 Air conditioning equipment 61 Connection opening 111 Outer cylinder 111a Step 112 Inner cylinder 112a Stopper 112b Flange 120 Connection nipple

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Nakashima Air-conditioning Kogi Fuji 968, Shima-cho, Itoshima-gun, Fukuoka Prefecture Inside (72) Inventor Takahiro Koga Air-cooling 968 Kofuji 968, Shima-cho, Itoshima-gun, Fukuoka F term in the company (reference) 3L080 AA01 AB03 AB08 AD01

Claims (4)

[Claims] 1. A substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is formed to protrude toward the outer periphery in a flange shape of a predetermined width to form a flange portion.
A projecting portion is formed by projecting a plurality of locations at the other end of the substantially cylindrical body outward to a substantially protruding shape at a predetermined height, and a ring having a predetermined width is formed along the outer peripheral surface of the substantially cylindrical body intermediate the flange and the protruding portion. A joint portion which is integrated with the flexible duct in a state where the end of the flexible duct is placed on the other end of the substantially cylindrical body and is brought into contact with the entire periphery of the packing; and a flange outside the joint portion A plurality of locking members having a diameter larger than the diameter and smaller than the outer diameter of the packing, fixed at a plurality of locations around a connection opening formed in the predetermined air conditioning equipment, and protruding inward of the opening; Insertion of the one end of the joint into the inside of the connection opening of the harmonizing device, the one end of the joint engages with the plurality of locking members and is held between the respective locking members. The opening periphery and the packing at the joint are in close contact with the entire circumference , Flexible duct connecting structure between the flexible duct and the air conditioning device is characterized in that it is connected hermetically. 2. A substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is protruded toward the outer peripheral side in a predetermined width flange shape to form a flange part.
A projecting portion is formed by projecting a plurality of locations at the other end of the substantially cylindrical body outward to a substantially protruding shape at a predetermined height, and a ring having a predetermined width is formed along the outer peripheral surface of the substantially cylindrical body intermediate the flange and the protruding portion. A joint part which is integrated with the flexible duct in a state where the flexible duct end is put on the other end of the substantially cylindrical body and is brought into contact with the entire periphery of the packing, and one end of the joint is The inner diameter is larger than the flange outer diameter and smaller than the packing outer diameter, and the other end is formed of a substantially cylindrical body attached to a connection opening of a predetermined air conditioner, and a plurality of locations at one end of the substantially cylindrical body A device-side cylinder having a plurality of locking members fixed to and protruding inwardly of the substantially cylindrical body, wherein the insertion of the one end of the joint into the one-end opening of the device-side cylinder, The portion engages with the plurality of locking members and holds between the locking members. A flexible duct connection structure, wherein one end of the device-side cylindrical body and the packing of the joint portion are in close contact with each other all around, and the flexible duct and the air-conditioning device are air-tightly connected. . 3. The flexible duct connection structure according to claim 1, wherein a notch formed by removing a flange-shaped protruding portion over a predetermined dimension larger than the locking member is formed in the flange of the joint. A flexible duct connection structure, wherein a plurality of flexible ducts are arranged in accordance with the arrangement intervals of the materials. 4. A substantially cylindrical body having an outer diameter substantially equal to the inner diameter of the flexible duct, and one end of the substantially cylindrical body is formed to protrude toward the outer periphery in a predetermined width flange shape to form a flange portion.
A projecting portion is formed by projecting a plurality of locations at the other end of the substantially cylindrical body outward to a substantially protruding shape at a predetermined height, and a ring having a predetermined width is formed along the outer peripheral surface of the substantially cylindrical body intermediate the flange and the protruding portion. The joint is provided with a flexible duct end covering the other end of the substantially cylindrical body, and is integrated with the flexible duct in a state of being brought into contact with the entire periphery of the packing, and a flange portion of the joint is provided. In addition, a plurality of notched portions from which flange-shaped protruding portions are removed over a predetermined dimension are arranged at predetermined circumferential intervals, and a plurality of flange-shaped protruding portions forming the same predetermined circumferential interval as the notched portions are formed into cylindrical portions of the joint portion. A plurality of engaging claw portions cut and raised in the axial direction are provided, the notch portion and the engaging claw portion are respectively overlapped with the joint portion facing another joint portion, and the engaging claw portion is provided in the notch portion. The joint is rotated with the hook inserted, and the engaging claw is A flange portion engaging adjacent notch inserting the use claw portion, flexible duct connecting structure, characterized in that for connecting together the flexible duct by connecting together the two joints.