JP2001050575A - Connecting structure of flexible duct for air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible duct connecting structure in which a flexible duct can be connected to a chamber box, etc., through simple work without using tools. SOLUTION: A connecting structure connects flow passages to each other by putting a flexible duct 1 for air conditioning integrally sealing a wire 1d for avoiding deformation on the connection ring 5a of a chamber box 5, etc. The wire 1d is laid in a connection pipe 1e except the part of the pipe 1e which is put on the ring 5a, and tightening bands 3 and 4 which tightly fasten the pipe 1e are attached to the pipe 1e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible duct for arranging a piping for air-conditioning air in an air conditioning facility for a building, and can easily perform a connection operation with, for example, an outlet or a chamber box. The present invention relates to a connection structure for an air conditioning flexible duct as described above.

[0002]

2. Description of the Related Art Air conditioning such as cooling and heating of a building is performed by installing an air conditioner in a machine room, supplying the air to air-conditioning outlets of each room via pipes, and cooling air from the outlets. It is basically blowing out hot air. A flexible duct that is easy to construct is used for a piping system installed behind the ceiling.

A flexible duct for air conditioning is formed in a bellows shape so that bending deformation, slight contraction and tensile deformation can be performed. For example, glass wool or the like is formed around an inner peripheral material forming an internal flow path. The heat insulating material is covered, and the surface of the heat insulating material is coated with a vinyl film or the like. In general, a wire is spirally wound and embedded in an inner peripheral material for shape retention.

When connecting such a flexible duct to an outlet or a chamber box to connect a flow path,
A cylindrical connecting member formed in the outlet or the chamber box or a connecting short pipe previously integrated with a flexible duct is used. That is, it is standard to extrapolate and integrate a flexible duct around these connectors or short tubes.

A tightening band used for connecting a flexible duct is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-82.
No. 436 is disclosed. This is a combination of a band piece using a thin steel plate or a metal band such as stainless steel and a stopper, and the stopper is a buckle for tightening. That is, when the band piece is wound around the flexible duct and tightened, the band piece is hooked on the stopper to keep the band in the tightened state, and the flexible duct is firmly fixed around the connector or the short pipe.

[0006]

Most of the bands for fixing the flexible duct to the connecting member and the like, including those described in the above-mentioned publications, use a thin metal strip. In order to make such a metal strip material, a wire for shape retention is spirally incorporated in the flexible duct, so in order to shrink and deform this wire and tighten it around the fitting, This is because sufficient strength is required. For example, a fibrous cord or resin tape can shrink the wire and bind it up, but the restoring force of the wire is always applied after construction,
It is inevitable that the strings and the resin tape will stretch.
For this reason, the fastening of the connecting portion of the flexible duct to the connector is loosened, and the conditioned air leaks or the flexible duct comes off.

However, when the band is made of a metal strip, the band piece is passed through a stopper functioning as a buckle, and the band piece is hooked onto the stopper when the degree of tightening is appropriate. In this case, even if the band piece is a thin plate material, it is hard and difficult to handle compared to a string or resin tape, and the thinner the band piece is, the sharper the edge is, so that the operator may accidentally cut a finger or use a flexible duct. Easy to tear the surface coating material.

[0008] As described above, in the conventional connection of the flexible duct, the band is limited to a thin metal plate which is strong and does not expand and deform because the band is tightened including the wire for keeping the shape. Therefore, a complicated operation for securing the degree of tightening using a tool or the like is required, and it is not possible to cope with the construction by the one-touch method.

An object of the present invention is to provide a flexible duct connection structure that can connect a flexible duct to a chamber box or the like by a simple operation without using a tool.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a connection structure for connecting a flow path by externally connecting a flexible duct for air conditioning in which a wire such as a wire for shape retention is integrally sealed to a tubular body to be connected. Wherein the wire is disposed except for a portion of the connecting cylinder extrapolated to the connected body, and the connecting cylinder is provided with a connection tightening band for binding around the connecting rod.

The connection tightening band is provided with a pair of joining margins along the outer periphery of the connection cylinder which can be pulled in a direction in which the connection cylinder is squeezed in a circumferential direction thereof, and a portion excluding the joining margin is formed by the joining cylinder. And a joining layer provided on at least one of the pair of joining margins so that the joining force of the joining band can be maintained by joining the joining layers.

The connection tightening band is passed through a sleeve stuck in a circumferential direction of the connection tube except for both ends, and both ends protruding from the sleeve are used as a pair of joining margins. In addition, at least one of the joining margins may include a joining layer, and the joining of the joining layers may be capable of holding the fastening force of the fastening band for connection.

Further, the connection tightening band has a base end connected to the buckle, and a distal end passed through the buckle, is restrained and disposed around the connection tube, and has a joining margin at a distal end protruding from the buckle at the time of tightening. And a bonding layer provided on at least the surface over the bonding margin or the portion passing through the buckle, and when the connection tightening band is bent with the buckle as a boundary, the connecting layer tightens the tightening force of the connection tightening band. Can be held.

Further, the connecting tightening band is
A first band with a buckle attached to each end,
A second member that forms an annular body that can be extrapolated around the connecting tube together with the first band around the two buckles.
A buckle is attached to the base end of the second band, and the front end is made to pass through the buckle so as to be able to face the surface of the first band, so that the first band and the second band are A bonding layer may be provided on at least one of the surfaces of the confronting portions, and the bonding force of the connection tightening band may be maintained by bonding the bonding layer.

[0015] In the above-described structure including the bonding layer, the bonding layer may be a surface fastener for applying a bonding force between the surfaces where the connection tightening bands overlap, or may be formed of an adhesive or a pressure-sensitive adhesive layer. can do.

[0016] Further, the connection tightening band is connected to the buckle at the base end side and passed through the buckle at the distal end side, and is restrained and disposed around the connection tube. The buckle passes through the connection tightening band. Then, a configuration may be employed in which the tightening force of the connecting tightening band can be held by the frictional force between the connecting tightening bands and the buckle.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing one embodiment of a connection structure of a flexible duct according to the present invention, wherein (a) is a schematic perspective view showing a main part of the flexible duct, and (b) is a connection of a chamber box. FIG. 4 is a longitudinal sectional view of a main part shown together with a ring part, and FIG. 7C is a schematic perspective view showing a main part of a tightening band.

The flexible duct 1 is made of a heat insulating material 1c using glass wool sealed between the outer skin material 1a and the inner skin material 1b and between them, as described in Japanese Patent Application Laid-Open No. Hei 8-82436. And a wire 1d for maintaining shape retention and providing strength. Except for the connection end portion of the flexible duct 1, the wire 1d is spirally incorporated along the outer peripheral surface of the inner skin material 1b. Therefore, since the connection end portion not including the wire 1d has a weak waist and is soft, the connection end portion shown in FIGS.
As shown in (1), when the outer shell material 1a and the heat insulating material 1c are squeezed, they are easily contracted and deformed.

As shown in FIG. 1 (a), if a forming tape 2 using an adhesive tape such as a gum tape is stuck around the connecting cylinder 1e to reduce the outer diameter, the squeezed state is maintained. Since the shape is maintained, the connection work becomes easy, and it can also be used to reinforce the band tightening described later. Hereinafter, an example in which the molding tape 2 is provided will be described, but the operation may be performed with the connecting cylinder 1e as it is.

A pair of connecting tightening bands 3 and 4 are provided on the surface of the molding tape 2 around the connecting cylinder 1e. Each of these connection fastening bands 3 and 4 has a base end of a fibrous base material 3a or 4a containing a synthetic fiber joined to the connection tube 1e and the molding tape 2 by heat welding or the like. Then, as shown in FIG. 1 (c), joints are respectively attached to the back surface of the front end portion of the base material 3a of the one fastening band 3 and the front surface of the front end portion of the base material 4a of the other fastening band 4. 3b and 4b are provided as bonding layers in the present embodiment. These joints 3b and 4b are formed by, for example, forming a bundle of fibers into a ring-shaped pile or a substantially J-shaped hook,
Alternatively, a pile-shaped one and a hook-shaped one are uniformly mixed, and a hook-and-loop fastener is configured to complement each other. This hook-and-loop fastener is known as a trade name "Magic Tape", and is designed to engage with each other by overlapping and pressing the joints 3b and 4b, and to release the engagement when strongly separated.

In the case where the joint 3b is in a pile shape as described above, the other joint 4b may have a hook-like weave, but the relationship may be reversed. In addition, the joints 3b, 4
Both b and b may be a mixture of pile and hook-shaped weaves. In short, the relationship between the joints 3b and 4b may be such that the joint structure by the hook-and-loop fastener is formed at the portion where the connection tightening bands 3 and 4 overlap. This is the same in the case of a zygote in another embodiment described later.

The connecting tube 1e of the flexible duct 1 is connected to the flow path by extrapolating around a connecting ring 5a protruding from the side wall of the chamber box 5 installed at the site. Connecting ring 5
a is a cylindrical shape smaller than the inner diameter of the connection tube 1e, that is, the inner diameter of the flow path of the flexible duct 1. After the connecting tube 1e of the flexible duct 1 is extrapolated to the connecting ring 5a, the connecting tube 1e is tightened around the connecting ring 5a, and the flexible duct 1 is connected to the connecting ring 5a by the connecting tightening band 3 so that the conditioned air does not leak out. Connect to

The procedure for integrating the flexible duct 1 into the connecting ring 5a is as follows: the connecting tube 1e of the flexible duct 1 is aligned with the connecting ring 5a of the chamber box 5 as shown in FIG. The ring 5a is inserted into the connecting tube 1e, and the connecting tube 1e is
By tightening. That is, as shown in FIG. 2A, the connection ring 5a is inserted into the connection tube 1e, and the connection tightening bands 3 and 4 are strongly pulled in the directions of arrows in the figure. As a result, the connection tightening bands 3 and 4 contract as shown in FIG.
Wrap around tightly. When the joints 3b and 4b are overlapped and strongly pressed, the connecting tightening bands 3 and 4 tighten the connecting tube 1e by the engaging force between the joints 3b and 4b, and the flexible duct 1 is moved. It is firmly connected to the connection ring 5a.

As described above, the connecting cylinders 1e are contracted by manually pulling the connecting tightening bands 3 and 4 which can be bent and deformed by the fibrous base materials 3a and 4a, and then the connectors 3b and 4 are contracted.
The flexible duct 1 and the connection ring 5a can be easily connected simply by pressing the portion b. This connection operation does not require tools, so that only one worker can work easily, and even when the connection state is poor, the joints 3b, 4
Since it is only necessary to peel off the base materials 3a and 4a of the portion b, the work load is small. Since there are no sharp metal parts in the connection tightening bands 3 and 4, there is no possibility that the operator accidentally cuts his hand or tears the outer cover 1a of the flexible duct 1.

Incidentally, instead of connecting the flexible duct 1 directly to the chamber box 5 at the time of construction on site,
It is also possible to insert a cylindrical adapter into the connection tube of the flexible duct 1 in advance, fix it by tightening it with the connection tightening bands 3 and 4, and connect to the chamber box via this adapter.

FIG. 3A is an exploded perspective view of a main part showing another embodiment, and FIG. 3B is a schematic sectional view of the main part at the time of tightening. The flexible duct is shown in Figs.
The connection end is formed as a connection cylinder whose outer diameter is reduced by a molding tape without incorporating a wire for shape retention at the connection end. The same applies to the flexible duct having such a configuration as shown in FIGS. 3 and subsequent drawings. The same components as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof is omitted. I do.

In FIG. 3, the fastening band 6 for connection comprises a fibrous base material 6a and joints 6b and 6c formed on the front and back surfaces at both ends thereof to constitute a surface fastener, as in the previous example. And is inserted into a sleeve 7 for promoting sliding during tightening. The sleeve 7 is, for example, an elongated bag made of a cloth or a resin sheet, and has a total length of a connecting cylinder 1e as shown in FIG.
When wrapped around, the connector 6b of the connection tightening band 6
6c is the length to be exposed together. An adhesive layer 7a is provided on the surface of the sleeve 7 facing the outer periphery of the connection cylinder 1e, and the adhesive layer 7a is used to adhere and fix around the forming tape 2 around the connection cylinder 1e. Note that the adhesive layer 7a is
It can be formed by a double-sided pressure-sensitive adhesive tape that is stuck to the surface of a sheet, or a single-sided pressure-sensitive adhesive tape that is stuck by an adhesive and has its pressure-sensitive adhesive surface facing the front side. Further, instead of such a tape, an adhesive to be applied before pasting around the connection tube 1e may be used.

The sleeve 7 having the adhesive layer 7a is integrally attached to the surface of the molding tape 2 around the connecting cylinder 1e as shown in FIG. 3B. After the connecting ring 5a of the chamber box 5 is inserted into the connecting cylinder 1e, the joint 6c is pressed from above with the joint 6b side down while pulling both ends of the connection tightening band 6. This allows
As in the example shown in FIG. 2, the connecting cylinder 1e is firmly connected to the connecting ring 5a. Further, when the connection tightening band 6 is tightened, the connection tightening band 6 slides in the sleeve 7, so that the tightening can be performed lightly and easily.

Further, since it is attached to the connection cylinder 1e by the adhesive layer 7a of the sleeve 7, the connection tightening band 6 can be easily attached to the connection cylinder 1e at the construction site instead of being attached at the time of shipment from the factory. That is, for example, in the example of FIG. 1, the base ends of the connection tightening bands 3 and 4 can be attached to the connection tube 1e by sewing or welding. However, such an operation can only be performed at a factory manufacturing stage. On the other hand, if the adhesive layer 7a is provided on the sleeve 7 and the sleeve 7 is directly attached to the connection cylinder 1e, the sleeve 7 can be easily attached even in a non-factory, and the responsiveness to field work is improved.

Further, when the connection tightening band 6 is tightened, the sleeve 7 is also squeezed, so that the adhesive layer 7a is strongly pressed against the peripheral surface of the connection tube 1e. Therefore, no force acts in the direction in which the sleeve 7 is peeled off, and there is no possibility that the connection tightening band 6 will come off the connection cylinder 1e.

FIGS. 4A and 4B show another example of a structure for attaching the connection tightening band to the flexible duct. FIG. 4A is a schematic perspective view of a main part, FIG.
(C) is a sectional view of a main part.

The connecting tightening band 8 in the example of FIG.
Is a band-like material in which joints 8a and 8a-1 are uniformly formed on the whole of each side of both sides as shown in FIG. 8b is opened, and elongated holes 8c and 8d are opened near the left and right ends. On the other hand, the connecting cylinder 1e of the flexible duct 1
The fixing holes 8b and the long holes 8c of the fastening band 8 for connection
Three holding fittings 9 are attached substantially corresponding to the position 8d. As shown in FIG. 4C, the holding metal fitting 9
It is inserted through the connecting cylinder 1e and the molding tape 2 on the peripheral surface thereof, and is prevented from coming off by the flanges 9a and 9b at both ends. And the connection tightening band 8
As shown in FIG. 4A, the fixing holes 8b and the long holes 8
By inserting the holding fitting 9 into c and 8d, it is attached around the connection tube 1e. At this time, the holding fitting 9 penetrated through the fixing hole 8b restrains the connection tightening band 8 so as not to be shifted left and right, but the long holes 8c and 8d are shifted in position with respect to the holding fitting 9 inserted therethrough. be able to. Therefore, when tightening around the connection cylinder 1e, the connection tightening band 8 has a tightening allowance corresponding to the range in which the holding fitting 9 can move within the elongated holes 8c and 8d.

As described above, also in the example in which the connection tightening band 8 is attached around the connection tube 1e via the holding fitting 9, the connection tube 1e with respect to the connection ring 5a of the chamber box.
Is almost the same as the example of FIG. However, one of the joints 8a and 8a-1 has a pile shape and the other has a hook-like weave relationship, or both have a mixture of a pile and hook-like weave. It is not always necessary to provide the joints 8a and 8a-1 provided on both sides of the connection tightening band 8, and at least the surfaces which overlap at least when wound around the connection tube 1e as in the example of FIG. May be provided with joints 8a and 8a-1.

Here, in the example shown in FIGS. 1 to 4, all of the connection tightening bands 3, 4, 6, 8 are connected to the joints 3b,
The connection cylinder 1e is tightened by using a surface fastener mechanism formed by 4b, 6b, 6c, 8a, and 8a-1. In the present invention, when assuming a configuration in which a portion where the connection tightening bands are overlapped with each other is a joining surface,
Instead of using the engaging force of the joint, an adhesive or a quick-drying adhesive may be used. For example, as shown in FIG. 5, adhesive layers 3c and 4c to which an adhesive or an adhesive is applied are formed on the front and back surfaces of the base materials 3a and 4a of the connection tightening bands 3 and 4 in the examples of FIGS. Then, a peeling tape 3d,
4d. Then, when tightening around the connecting cylinder 1e, the release tapes 3d, 4d are peeled off from the base materials 3a, 4a as shown by the dashed line in the figure, and the adhesive layers 3c, 4c are joined in the same manner as in the example of FIG. Can be bound by the connection tightening bands 3 and 4 around the connection cylinder 1e. If the base materials 3a and 4a are adhesive, one of them is provided with an adhesive layer covered with a release tape, and when tightening, the release tape is peeled off and the other base material is applied by the adhesive layer. It goes without saying that the bonding may be performed.

FIGS. 6A and 6B show an example in which a buckle is attached to the connection tightening band and the buckle is bent and tightened. FIG. 6A is an exploded perspective view of a main part, and FIGS. FIG.

The fastening band 10 for connection in the example of FIG.
Is a combination of the fibrous base material 10a and the buckle 11 attached to the base end thereof, as in the previous examples.
The connector 10b is provided only on one surface on the distal end side of FIG. In this case, the joint 10b is formed by uniformly mixing the pile and the hook-like weave, and the joints 10b can be joined to each other by the hook-and-loop fastener mechanism at any point where the joint is bent by the buckle 11.

The buckle 11 has two substantially square openings 1.
1a and 11b are provided, and the base end side of the base material 10a is connected by being wound around an outer shell forming one opening 11a.
Then, the surface on which the joint 10b is provided is on the opposite side to the peripheral surface of the connection tube 1e, and the tip of the base material 10a is passed through another opening 11b so as to be annular. On the other hand, a connection tightening band 10 is provided on the peripheral surface of the connection cylinder 1e.
A plurality of through loops 1f for holding around are provided at intervals. These through loops 1f are, for example, belts for pants, and are formed of cloth or resin. Note that the molding tape 2 is attached around the connection tube 1e in a state of being inserted into these through loops 1f, and this is the same in the examples of FIGS. 7 and 8 described later.

The connecting tightening band 10 is inserted through the loop 1f from the distal end without being passed through the buckle 11 and wound around the connecting tube 1e, and then the annular end is passed through the opening 11b of the buckle 11. (FIG. 6B). Then, after depositing the ring-shaped connection tightening band 10 and the buckle 11 around the connection tube 1e,
As shown in FIG. 6B, the tip of the connection tightening band 10 is strongly pulled in the direction of the arrow. As a result, the connection tightening band 10 connects the connection cylinder 1e to the connection ring 5a of the chamber box.
When the connection fastening band 10 is bent in the direction of the arrow in FIG.
Are engaged and stopped.

As described above, the connection tightening band 10 is
The connection tube 1e is wound around the connection tube 1e through the loop 1f and is formed as an annular body having the tip passed through the buckle 11.
You can leave around. Therefore, it can be shipped from the factory in the form of a package in which the connection tightening band 10 is integrated with the flexible duct 1, and in particular, if the package is formed with the joint 10 b engaged as shown in FIG. be able to. Then, in the on-site construction, it is only necessary to pull the tip of the connection tightening band 10 and to bend the tip and press the joints 10b together. For this reason, the flexible duct 1 can be connected to the connection ring by one-touch method using one hand, and workability is remarkably improved as compared with assembly using a tool.

The buckle 11 in the example shown in FIG.
Although the openings 11a and 11b are provided, a square annular body having one opening may be used instead. In short, the buckle can tie the base end of the connection tightening band 10, and
Any shape may be used as long as it can be bent in the opposite direction to the base end side that is inserted from the front end and connected.

FIG. 7 shows an example in which three buckles and two bands constitute a connection tightening band so that the tightening operation can be performed with half the force as compared with the example shown in FIG. FIG. 2A is an exploded perspective view of a main part thereof, and FIG. 2B is a schematic view showing an arrangement of a buckle and a band around a connection tube.

As shown in FIG. 7A, buckles 12a and 12b each having a square ring at both ends of the first band 12.
And a joint 12c is provided on the surface side of the first band and near one buckle 12b.
The second band 13 has a square buckle 13a attached to one end thereof.
Buckles 12a and 12b in this order. Also,
The second band 13 returns to its own buckle 13a and passes therethrough to form a closed loop, and further has a connector 13b on the back surface on the tip side. One of the joints 12c and 13b may have a pile shape and the other may have a hook-like weave relationship, or both may have a pile and hook-like weave mixture.

Before the first and second bands 12 and 13 are formed into an annular shape, the first and second bands 12 and 13 are inserted into a through loop 1f provided in the connecting cylinder 1e and wound to form a package attached to the flexible duct 1. In this case, as shown in FIG.
When c and 13b are temporarily fixed to each other, the second band 13 and the tip of the band 13 can be compactly assembled, and handling from factory shipment to on-site transportation becomes easy.

In the on-site connection construction, if the temporarily fixed joints 12c and 13b are disengaged and then the second band 13 is bent in the direction of arrow B while pulling in the direction of arrow A in the figure, The joints 12c and 13b of the first and second bands 12 and 13 overlap each other. Thereby, the first and second
Bands 12 and 13 can form an annular body along the circumference of the connecting cylinder 1e and tighten up around the connecting cylinder 1e.
Tightening is maintained by the engagement of the connectors 12c and 13b.

Here, in the example of FIG. 7, the first band 12
Is sufficiently shorter than the outer peripheral length of the connection tube 1e, and the tightening operation of the first and second bands 12, 13 is performed by pulling the second band 13. When the second band 13 is pulled, the buckles 12 attached to both ends of the first band 12
Both ends of the first band 12 are simultaneously pulled by the a and 12b. That is, in the example of FIG. 6, one end of one connection tightening band 10 is pulled and tightened.
The pulling force F ₀ is equal to the tightening force T ₀ (F ₀ =
T ₀ ). On the other hand, in the example shown in FIG. 7, the tension of the first band 12 is T ₁ , the tension of the second band 13 is T _2, and the second band 13 is When the pulling force is F, T ₁ = 2 × T ₂ and F = T ₂ . Therefore, in order the same as the clamping force T ₀ according to the band 10 fastening for connection in the example of FIG. 6 is T ₁
= T is _{0, F = T 2 = T} 1/2 = T 0/2 = F 0 /
It becomes 2. Therefore, the tightening force of the second band 13 is only half the size of the connection tightening band 10 in the example of FIG. 6, and the burden of the tightening operation is reduced.

FIG. 8 shows an example in which one connecting tightening band and one buckle are used to enable the tightening operation by the locking force of the buckle. FIG. 8A is an exploded perspective view of a main part. (B) is a perspective view showing a locking structure between the connection fastening band and the buckle, and (c) is a cross-sectional view of the locking structure.

In FIG. 8, the connection tightening band 14 is a flat rope material made of a fibrous material or a synthetic resin as in the previous examples, and has a buckle 15 attached to one end. Then, similarly to the example of FIG. 6, the connection tightening band 14 is inserted through the loop 1f, wound around the connection tube 1e, the front end is temporarily fixed through the buckle 15, and the package is shipped from the factory.

The buckle 15 is provided with intermediate members 15c and 15d at an interval between outer shell members 15a and 15b, as shown in FIG. The outer member 15a and the intermediate member 15c are inserted around the outer member 15b and the intermediate member 15d, respectively. Then, by pulling both ends or one end of the connection tightening band 14 in the direction of the arrow in the drawing, the area around the connection cylinder 1e can be tightened. At the time of this tightening, the connection tightening band 14 exerts friction between the outer shell members 15a, 15b and the respective peripheral surfaces of the intermediate members 15c, 15d and friction between the surfaces of the connection tightening band 14. Therefore, the connection fastening band 14 can be locked to the buckle 15 in a state of being tightened by this friction.

As described above, the outer members 15a, 15b and the intermediate members 15c, 1 of the buckle 15 can be provided even if no joint is provided or the adhesive layer is not formed on the connection tightening band 14.
It can be tightened by passing around 5d. Therefore, the connection tightening band 14 is connected to the buckle 1.
5 and then leave it around the connection tube 1e to support the buckle 15 with one hand while holding the buckle 15 with one hand.
By pulling one end of 4 with the other hand, the connecting cylinder 1e can be tightened and fixed to the connecting ring.

FIGS. 9 to 11 are schematic views of other examples of the connection tightening band which can be applied to the connection of a flexible duct by forming an adhesive layer on a part of the surface thereof. I do. The bands in these examples are made of a fibrous material or a synthetic resin tape material, as in the previous examples.

In the example shown in FIG. 9, a temporary fixing adhesive layer 16a having a low adhesive strength is provided on a part of the surface of the band 16, and an adhesive layer 16b is formed on the back surface on the tip side. Each of these adhesive layers 16a and 16b is coated with an adhesive or the like, and as shown in FIG.
The portion from the portion to the tip of the band 16 is double-folded, and only the temporary fixing adhesive layer 16a is adhered to the surface of the inner band 16 to maintain the shape. Then, when tightening around the connection cylinder, as shown in FIG.
By peeling off the part and bending the tip of the band 16 inward (FIG. 4C), the adhesive layer 16 is bent inward.
The band 16 is made annular by b and tightened around the connection tube (FIG. 4D).

In the example shown in FIG. 10, an adhesive layer 17a is provided on the surface of one end of the band 17, and a buckle 17b having the same shape as that shown in FIG. 6, for example, is provided on the other end. One end of the band 17 on which the adhesive layer 17a is formed is folded in two as shown in FIG.
7a are temporarily fixed by each other, and buckle 1
7b ((b) in the figure). Then, when the two-folded portion of the band 17 is separated, the adhesive layer 17a comes to face the surface of the band 17 having an annular shape (FIG. 10C), and the tip of the band 17 is pulled to form an annular portion. When the adhesive layer 17a is pressed against the surface of the band 17 ((d) and (e) in the figure), the band 17 becomes annular and tightens around the connection tube.

The example shown in FIG. 11 is similar to the example shown in FIG. 10 in that an adhesive layer 18a is provided on one end surface of the band 18 and a buckle 18b is provided on the other end side. Only in that a release paper 18c is provided.

Since the release paper 18c is adhered to the adhesive layer 18a formed on the surface on one end side of the band 18,
In this state, insert the buckle 18b ((a) in FIG.
(B)) Next, the release paper 18c is peeled off ((c) in the figure). After that, similarly to the example of FIG.
By bending the portion where a is formed from the buckle 18b and pressing the adhesive layer 18a against the peripheral surface of the ring-shaped band 18 ((d) in the figure), the band 18 can be tightened around the connection cylinder. Becomes

[0056]

According to the present invention, since the connecting tube is easily deformed by removing the wire for shape retention from the connecting end of the flexible duct, it is not necessary to use a band using a thin metal plate. A tightening band for connection using a base material such as the above can sufficiently cope. Therefore, after the connection tube is tightened by the connection tightening band, the connection can be stopped by merely overlapping the joining layers such as the joints, so that there is no need to use a tool and simple construction by the one-touch method can be performed. Further, since a thin sharp metal band is not used at all, the operator does not cut his hand or tear the outer covering material of the flexible duct, and the safety and reliability are improved.

[Brief description of the drawings]

FIG. 1 is an embodiment of a connection structure of a flexible duct for air conditioning according to the present invention, in which (a) is a perspective view of a main part,
(B) is a sectional view of a main part shown together with a connection ring portion of the chamber box, and (c) is a schematic view showing a tip of a connection tightening band and a position where a joint is formed.

FIG. 2 is a schematic view of a main part showing tightening of a connection tube of a flexible duct by the connection tightening band of FIG. 1, wherein (a) is a cross-sectional view showing a state before tightening and (b) is a state showing completion of tightening. is there.

FIG. 3 is an example in which a connection tightening band is passed through a sleeve. FIG. 3 (a) is an exploded perspective view of a main part, and FIG. 3 (b) is a schematic view of the main part when tightened.

FIG. 4 is an example in which a connection tightening band is attached in advance around a connection cylinder of a flexible duct, and FIG.
3 is a perspective view of a main part, (b) is a development view of a connection tightening band, and (c) is a cross-sectional view of the main part showing a mounting structure of the connection tightening band using a holder.

FIG. 5 is a schematic perspective view of a main part showing an example in which an adhesive layer and a release tape are provided on a connection tightening band.

FIG. 6 is an example in which a buckle is provided in a connection tightening band, where (a) is an exploded perspective view of a main part, (b) is a state before tightening, and (c) is a main part showing a state after tightening. FIG.

FIG. 7 is an example in which two bands and three buckles are combined, (a) is an exploded perspective view of a main part, and (b) shows a positional relationship between the band and the buckle around a connection tube. It is a schematic diagram.

8A and 8B are examples in which a fastening band for connection is passed through a buckle, and FIG. 8A is an exploded perspective view of a main part;
(B) is an external view showing the insertion of the band through the buckle, and (c) is a cross-sectional view taken along the line AA of FIG. (B).

FIG. 9 is a schematic view sequentially showing a tightening procedure using a band having a temporary fixing adhesive layer and a tightening adhesive layer on the surface.

FIG. 10 is a schematic view sequentially illustrating a tightening procedure using a band in which an adhesive layer and a buckle are combined.

FIG. 11 is a schematic view sequentially showing a tightening procedure using a band formed by combining an adhesive layer with a release paper and a buckle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible duct 1a Skin material 1b Endothelium material 1c Heat insulating material 1d Wire 1e Connection tube 1f Through loop 2 Molding tape 3 Connection tightening band 3a Base material 3b Joiner 3c Adhesive layer 3d Release tape 4 Connection tightening band 4a Base material 4b Join Element 4c Adhesive layer 4d Release tape 5 Chamber box 5a Connection ring 6 Connection tightening band 6a Base material 6b, 6c Joint 7 Sleeve 7a Adhesive layer 8 Connection tightening band 8a, 8a-1 Joint 8b Fixing hole 8c, 8d Length Hole 9 Holder 9a, 9b Flange 10 Connection tightening band 10a Base material 10b Joint 11 Buckle 11a, 11b Opening 12 First band 12a, 12b Buckle 12c Joint 13 Second band 13a Buckle 13b Joint 14 Connection Tightening band 15 Buckle 15 a, 15b Shell material 15c, 15d Intermediate material 16 Band 16a Adhesive layer for temporary fixing 16b Resin layer 17 Band 17a Adhesive layer 17b Buckle 18 Band 18a Adhesive layer 18b Buckle 18c Release paper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichi Nakajima 1034-4, Wada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture Inside (72) Inventor Shinichi Abe 1034-4, Wada, Sasaguri-cho, Kasuya-gun, Fukuoka F-term in Airtech Co., Ltd. (reference) 3L080 AA01 AB02 AB07 AD01 AD02

Claims (8)

[Claims] 1. A connection structure for connecting a flow path by externally connecting a flexible duct for air conditioning in which a wire such as a wire for shape retention is integrally sealed to a tubular connected body, wherein the connected body is Arrange the wire rod except for the part of the connection tube to extrapolate to,
A connection structure for a flexible duct for air conditioning, wherein the connection tube is provided with a connection tightening band for binding around the connection tube. 2. The connection tightening band includes a pair of joining margins along the outer periphery of the connection cylinder that can be pulled in a direction in which the connection cylinder is squeezed in a circumferential direction thereof, and a portion excluding the joining margin is formed by the connection margin. 2. A connecting tube connected to a connecting cylinder, wherein at least one of the pair of connecting margins is provided with a connecting layer, and the connecting layer can hold a tightening force of the connecting band. Flexible duct connection structure for air conditioning. 3. The connection tightening band is passed through a sleeve stuck in a circumferential direction of the connection tube except for both ends, and both ends protruding from the sleeve are used as a pair of joining margins. 2. A connection structure for a flexible duct for air conditioning according to claim 1, wherein at least one of the joining margins is provided with a joining layer, and the joining force of the joining band can be maintained by joining the joining layer. . 4. The connection tightening band has a proximal end connected to a buckle, a distal end passing through the buckle, being restrained and disposed around the connection tube, and a distal end protruding from the buckle at the time of tightening. And a bonding layer provided on at least the surface over the bonding margin or the portion passing through the buckle, and when the connection tightening band is bent with the buckle as a boundary, the connecting layer tightens the tightening force of the connection tightening band. The air-conditioning flexible duct connection structure according to claim 1, wherein 5. A connecting band which can be externally inserted around the connecting tube together with the first band, the first band having a buckle attached to each end of the connecting band, and the second band being wrapped around the two buckles. A second band forming a body, wherein a buckle is attached to a base end of the second band, and a front end of the second band is passed through the buckle so as to be able to face the surface of the first band. And the second
2. A flexible duct for air-conditioning according to claim 1, wherein a bonding layer is provided on at least one of the surfaces of the portion where the band faces each other, and the tightening force of the connecting tightening band can be held by bonding the bonding layer. Connection structure. 6. The air conditioning flexible according to claim 2, wherein the joining layer is a surface fastener that applies a joining force between surfaces where the connection tightening bands overlap. Duct connection structure. 7. The flexible duct connection structure according to claim 2, wherein the joining layer is an adhesive or a pressure-sensitive adhesive layer. 8. The connection tightening band has a proximal end connected to a buckle and a distal end passed through the buckle, and is restrained and disposed around the connection tube.
2. The air-conditioning flexible according to claim 1, wherein when the connection tightening band is passed, the tightening force of the connection tightening band can be held by a frictional force between the connecting tightening bands and a buckle. Duct connection structure.