JPH10197038A - Duct connector - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a duct connector in which connection work is easy, heat insulation is not adversely affected, and dew condensation does not occur. A duct connector has a flange joint portion.
6 is provided with a ring body 11 that can be mounted on the outer periphery, and a locking piece 12 that is formed on the ring body 11 and that can be bent toward the center of the flanges 14f and 15f. Further, the ring body 11 and the locking piece 12 are formed of a metal plate material, and a plurality of slits 13 are provided in a bent portion of the locking piece 12 to facilitate bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct connecting tool for connecting ducts of an air conditioner or between ducts and various devices.

[0002]

2. Description of the Related Art In air conditioning equipment installed in a large building such as a building, various ducts such as a flexible duct and a spiral duct are used to supply air to a target place. Depending on the situation, it may be necessary to connect the ducts or the ducts with various devices. For this reason, conventionally, various connecting means have been developed for the purpose of achieving easy connection and reliable connection.

Examples of conventional connecting means include a connecting nipple disclosed in Utility Model Registration No. 3031684 and a duct connecting structure disclosed in Japanese Utility Model Laid-Open No. 7-12842.

The connection nipple disclosed in Utility Model Registration No. 3031684 is used for connecting two flexible ducts, and the ends of the flexible ducts to be connected are press-fitted into the connection nipples. By doing so, the ducts are firmly connected to each other.

On the other hand, the duct connecting structure disclosed in Japanese Utility Model Laid-Open Publication No. 7-12842 is a structure for connecting a flexible duct to a duct such as an air blowing device, and is provided by an intermediate cylinder. , Connect both ducts.

[0006]

Among these connecting means, the connection nipple disclosed in Utility Model Registration No. 3031684 is excellent in that it can firmly connect the duct, but In this case, since a certain amount of force must be applied to press the duct in the axial direction, the connection work is difficult when working alone in a narrow place. In addition, since the connection nipple has a complicated structure, the manufacturing cost is high.

On the other hand, in the case of the duct connection structure disclosed in Japanese Utility Model Laid-Open Publication No. 7-12842, reliable connection can be obtained through a simple-shaped intermediate cylinder.
The work is troublesome since the duct and the intermediate cylinder must be fitted until they are properly engaged. In addition, since it is necessary to insert the duct so that the center axis of the duct and the center axis of the intermediate cylindrical body always coincide with each other, the inserting operation requires some skill. In particular, as the diameter of the duct to be connected increases, the fitting operation becomes more difficult.

As described above, various connecting means have been conventionally developed, but many of them have complicated structures and are expensive to manufacture, and many of them are difficult to connect, so that they can be widely and generally implemented. The fact is that there is no one equipped with.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a duct connector which can be easily connected, does not adversely affect heat insulation, and is free from dew condensation.

[0010]

In order to solve the above-mentioned problems, the present invention is a duct connector for fixing a flange joint when connecting ducts having flanges at the ends thereof. A ring body that can be attached to the outer circumference,
A locking portion formed on the ring body and capable of being bent toward the center of the flange.

When connecting two ducts, the duct connector of the present invention is inserted through one duct, the flanges of the ducts are joined together, and then the duct connector is moved to join the ring body to the flange joint portion. Attach to the outer circumference of. And
The locking portion formed on the ring body is bent toward the center of the flange and is brought into contact with the back surface of each flange to fix the flange joint so as not to separate. In this case, it is desirable to form a plurality of locking parts at equal intervals along the ring body so that the pressing force of the locking parts acts evenly on the back surface of each flange.

As described above, both ducts can be connected by simply mounting the ring body on the outer periphery of the flange joint and bending the locking portion toward the center of the flange, so that the connecting work is easy. In addition, the duct connector of the present invention,
It is mounted on the outer periphery of the flange joint, and there is no portion that comes into contact with the air passing through the duct, so there is no adverse effect on the heat insulation and there is no possibility of dew formation.

[0013] Here, the ring body and the locking portion of the duct connector may be formed of a plate material. When a plate material is used, punching by a press is possible, and it is easy to form a ring, so that the manufacturing process is greatly simplified and the manufacturing cost can be reduced. Further, in the case of a plate material, since the strength in the direction corresponding to the surface is large, in a portion requiring strength, if a structure in which the load direction and the surface of the plate material are adopted is adopted, the plate material is thin. Since it is possible to secure sufficient strength, it is possible to reduce the weight of the duct connector.

In this case, the locking portion may have a structure that can be bent substantially parallel to the axial direction of the flange. The plate material is relatively easy to bend, but has high strength in the direction corresponding to the surface, so that when the locking portion is bent, it is substantially parallel to the axial direction of the flange. Since the strength in the direction required when pressing is maximized, a strong connection state can be obtained. In this case, by forming a slit or a hole in the bent portion of the locking portion, the force required for bending can be reduced without substantially reducing the strength in the direction of pressing the flange joint portion. Is improved.

On the other hand, in the duct connector of the present invention, the ring body may be provided with a holding portion that engages with the flange joint portion and holds the ring body. When performing the work of attaching the ring body to the outer circumference of the flange joint and bending the locking part, providing such a holding part will hold the ring body so that it does not move freely, improving workability Therefore, reliable connection can be performed.

Here, as the holding portion, a tongue piece that can be bent toward the center of the ring body may be formed on the ring body.
Before joining the flanges, the ring body of the duct connector inserted into one of the duct sides is attached to the outer periphery of the flange, and the tongue piece is bent toward the center of the ring body. afterwards,
When the flange of the other duct is joined, the tongue piece is sandwiched between the flange joints, so that the ring body is held so as not to move freely. Therefore, the workability when bending the locking portion is improved.

In this case, one tongue may be provided, but a plurality of tongues may be provided at equal intervals along the ring in order to stably hold the ring. Further, if a slit or a hole is formed in the bent portion of the tongue piece, the force required for bending can be reduced, so that workability is improved.

Further, as the holding portion, in addition to the tongue piece, a protrusion protruding toward the center of the ring body may be formed.
If the protrusion is engaged with the flange joint by the same procedure as described above, the ring body is held so as not to move, so that the workability when bending the locking part is improved. Since such a protrusion can hold the ring body without deeply entering the flange joint,
This has the advantage that no gap is created at the flange joint. In this case, the number of protrusions may be one, but in order to stably hold the ring, it is desirable to provide a plurality of protrusions at equal intervals along the circumference of the ring, and in addition, along the circumference of the ring. A ridge may be formed.

Further, in the duct connecting tool of the present invention, the ring body may be provided with a locking portion for locking the duct hanging tool. If such a locking portion is provided, after the fixing of the flange joint portion is completed, the duct can be held in a suspended state only by locking the duct hanging tool to the locking portion. , Workability at the site is improved. In this case, slits, holes, notches, etc. can be formed in the ring body as the locking parts, and if multiple slits, holes, etc. are formed over the entire circumference of the ring body, the mounting state of the ring body This is convenient because the engagement of the duct hanging tool can be performed without being affected by the above.

On the other hand, the duct connector of the present invention comprises a strip which can be deformed along the outer periphery of the flange joint, connecting means for connecting the ends of the strip, and a center direction of the flange which is formed on the strip. And a locking portion that can be bent.

[0021] This duct connector has a band shape before use, and when actually used, the band member is deformed along the outer periphery by winding the band around the outer periphery of the flange joint, and the ends are joined together. By connecting it into a ring shape,
Attach to the flange joint. After this, similarly to the duct connector described above, bend the locking part toward the center of the flange,
If the flange is brought into contact with the rear surface, the flange joint can be fixed so as not to be separated.

In the case of this duct connector, after the ends are connected by connecting means to form a ring shape, the duct connector can be used in the same manner as the duct connector described above, and other structures and functions are also described in the above. Can be provided with the same duct connection tool as that described above. In the case of this duct connector, it has a band shape before use, so if you stack many sheets,
In addition to the small space required for storage and transportation, there is an advantage that even if the flange joint is in a tight contact state, it can be connected by winding it around the flange joint as it is.

Here, as connecting means, notches which can be engaged with each other may be formed near both ends of the strip. By providing such a cut-out portion, the connection can be performed only by engaging the two with each other, so that the connection work can be performed easily and quickly.

In this case, at least one of the ends of the band-shaped body may be provided with a locking piece which can be bent and locked to the side edge of the other end. By providing such a locking piece, the connection portion can be more firmly held, so that it does not come off during the work to be performed later, and the workability is improved.

Further, as the connecting means, a locking hole formed at one end of the belt-like body and a locking piece formed at the other end and inserted into the locking hole may be employed. it can. With this structure, it is possible to connect by simply inserting the locking piece into the locking hole and bending after winding the strip around the flange joint, so the work is easy and reliable. Connection state is obtained.

On the other hand, the duct connecting device of the present invention may have a structure in which a bendable hanging portion having a locking hole for locking the duct hanging device is formed at at least one end of the strip. Good. With such a structure, after the connection work is completed, the duct can be held in a suspended state by engaging the duct suspending tool with the locking hole of the suspending section. Omission and workability at the site are improved.
The hanging part may be either bent at the work site or bent in advance into a predetermined shape. Also in this duct connector, the band-like body may be provided with holes, slits, notches, etc. for locking the duct suspending tool.

Further, in the duct connector of the present invention, the bent portions such as the engaging portion, the tongue piece, the engaging piece, and the hanging portion are
A slit or a hole for reducing the force required for bending can be formed. By forming such slits or holes, the bending work can be facilitated with almost no reduction in the strength of the bent portion.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a duct coupler according to a first embodiment of the present invention, FIG. 2 is an explanatory view showing a use state of the duct coupler, FIG. 3 is a perspective view showing a use state of the duct coupler, FIG. 4 is a sectional view taken along line AA of FIG.

The duct connector 10 of this embodiment fixes the joint 16 between the flanges 14f and 15f when connecting the ducts 14 and 15 having the flanges 14f and 15f at the ends. A ring member 11 that can be mounted on the outer periphery of the ring member 16 and a locking piece 1 formed on the ring member 11 and that can be bent toward the center of the flanges 14f and 15f.
2 and. Six locking pieces 12 are arranged on both sides of the ring body 11 at equal intervals. Further, the ring body 11 and the locking piece 12 are formed of a metal plate material, and a plurality of slits 13 are provided in the bent portion of the locking piece 12.

When connecting the two ducts 14 and 15,
As shown in FIG. 2, the duct connector 1 is attached to one of the ducts 14.
0, the flange 15f of the duct 15 is joined to the flange 14f of the duct 14, and then the duct connector 10 is moved to attach the ring body 11 to the outer periphery of the flange joint 16.

Then, as shown in FIG.
The locking pieces 12 formed on the flanges 14f, 1
5f is bent toward the center, and each flange 14
If they are brought into contact with the rear surfaces of f and 15f, the flange joint portion 16
Can be fixed in close contact. In addition, locking member 1
Since the slit 13 is provided in the bent portion of No. 2, the force required for bending is small, and workability is good.

Further, since six locking pieces 12 are arranged at equal intervals on both sides of the ring body 11, the pressing force of the locking pieces 12 acts evenly on the rear surfaces of the flanges 14f and 15f, and the gap is formed. Can be connected without. In addition,
The locking piece 12 is made of metal, and once bent, the bent portion is work hardened and does not easily return to its original shape, so that a stable connected state can be maintained.

As described above, the ducts 14 and 15 can be connected only by mounting the ring 11 on the outer periphery of the flange joint 16 and bending the locking piece 12 toward the center of the ring 11. Connection work is easy. Also,
Since the duct connector 10 is attached to the outer periphery of the flange joint 16 and has no portion that comes into contact with the air passing through the ducts 14 and 15, the heat insulating property is not adversely affected, and there is no possibility of dew formation.

Further, since the ring body 11 and the locking piece 12 of the duct connector 10 are formed of a metal plate, they can be punched by a press, and are very easily formed into a ring shape. Therefore, the manufacturing process is greatly simplified and the manufacturing cost can be reduced. In the case of a plate material, the strength against a force parallel to the surface is large, so that only a portion to which a large load is applied needs to have a structure in which the direction of the load matches the surface direction of the plate material. Therefore, the weight of the duct connector 10 can be reduced.

On the other hand, the ring body 11 is
When the locking piece 12 is bent and attached, the surface of the locking piece 12 becomes substantially parallel to the axial direction of the ring body 12, so that the flange 14
A great force can be exerted when pressing the back surfaces of f and 15f, and the connected state becomes strong. Further, since the slit 13 is formed in the bent portion of the locking piece 12, the flange 1
Since the force required for bending can be reduced without substantially lowering the strength in the direction of pressing the back surface of 4f, 15f, the workability at the time of duct connection is improved.

Next, referring to FIGS. 5 and 6, the second embodiment of the present invention will be described.
An embodiment will be described. FIG. 5 is a perspective view illustrating a duct connector according to a second embodiment, and FIG. 6 is a perspective view illustrating a use state of the duct connector.

In the duct connector 20 of the present embodiment, the locking piece 22 and the slit 23 are formed in the ring body 21 similarly to the duct connector 10, and the tongue piece 24 which can be bent toward the center of the ring body 21 is provided. Has formed. In addition, tongue piece 2
A plurality of slits 23 are formed in the bent portion 4.

In the case where the duct connector 20 is used, FIG.
As shown in FIG. 7, before joining the flanges 14f and 15f, the ring body 21 of the duct connector 20 inserted through the duct 14 is attached to the outer periphery of the flange 14f, and the tongue piece 24
Is bent toward the center of the ring body 21. Thereafter, when the flange 15f of the duct 15 is joined, the tongue piece 24 is sandwiched between the joined portions of the flanges 14f, 15f, so that the ring body 21 is held so as not to move without permission.
Therefore, the workability when the locking piece 24 is bent thereafter becomes good, and reliable connection can be performed.

In the duct connector 20, since the two tongue pieces 24 are formed at opposing positions, the ring body 21 can be stably held. Further, since the slit 23 is formed in the bent portion of the tongue piece 24, the force required for bending is small and the work is easy.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is an explanatory view showing a usage state of the duct connector according to the third embodiment.

In the duct connector 30 of the present embodiment, like the duct connector 10, the locking piece 3 is attached to the ring body 31.
2 and the like are formed, and a protrusion 33 protruding toward the center of the ring body 31 is formed. Like the tongue piece 24, the projection 33 connects the ring 31 to the flanges 14f, 15f.
It has a function of holding the ring body 31 so that it does not move freely when it is attached to the joint portion.

When the projection 33 is engaged with the joint between the flanges 14f and 15f by the same procedure as that of the duct connector 20, the ring 33 is held so as not to move. Workability when bending is improved. Since the projection 33 can hold the ring body 31 without deeply entering the joint of the flanges 14f and 15f, there is an advantage that no gap is formed at the joint. In the present embodiment, since the four protrusions are formed at 90 ° intervals, the ring body 31 can be stably held. The number of the projections can be freely increased or decreased according to the size of the ring body and the like.
A ridge may be provided along the inner circumference.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is an explanatory diagram illustrating a use state of the duct coupler according to the fourth embodiment.

In the duct connector 40 of the present embodiment, similar to the duct connector 10 and the like, a locking piece 42 and the like are formed on the ring body 41 and a locking member for locking the duct suspension tool 43. A slit 44 is provided. Therefore, after the fixing of the flange joints of the ducts 14 and 15 is completed, the ducts 14 and 15 can be held in a suspended state only by inserting the duct suspending tool 43 into the locking slit 44. Workability on site is improved. Also,
In this case, since a plurality of locking slits 44 are formed over the entire circumference of the ring body 41, the engagement with the duct suspension tool 43 can be performed regardless of the state of the ring body 41. .

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is an explanatory view showing a duct connector according to a fifth embodiment.

The duct connector 50 of this embodiment is similar to that of FIG.
As shown in (a), a strip 51 deformable along the outer periphery of the flange joint, cutouts 52 and 53 for connecting the ends of the strip 51, and a flange formed in the strip 51. And a locking portion 54 that can be bent toward the center of the frame.

The duct connector 50 has a band shape before use, and when actually used, the band member 51 is wound around the outer periphery of the flange joint portion and deformed along it, as shown in FIG. 9 (b). As shown in FIG. 5, the cutouts 52 and 53 are connected to each other to form a ring shape and be attached to the flange joint, so that the work can be performed easily and quickly. After that, as in the case of the duct connector 10 described above, if the locking portion 54 is bent toward the center of the flange and brought into contact with the back surface of the flange, the flange joint can be fixed so as not to separate. .

In the case of this duct connector 50, the notch 5
After the two and 53 are connected to each other to form a ring shape, they can be used in exactly the same way as the duct connector 10, and the other structures and functions are the same as those of the duct connector 10. Since the duct connecting tool 10 has a strip shape before use, a small space required for storage and transportation can be obtained by stacking a number of sheets on top of each other. There is an advantage that the connection can be made by winding around the part.

Next, the duct connector of the sixth embodiment will be described with reference to FIG. FIG. 6 is an explanatory view showing a duct connector of the sixth embodiment. As shown in FIG. 10 (a), the duct coupler 60 is provided with notches 62, 63 which can be engaged with each other near both ends of the band-shaped body 61 as connecting means.
Are formed, and the locking piece 6 is attached to the end of the band-shaped body 61.
4, 65 are provided.

Therefore, as shown in FIG.
After the notches 62, 63 are engaged with each other, the locking pieces 64, 6
By bending the distal end portion of 5 and locking it to the side edge of the other end portion, the connection portion can be more firmly held, so that it does not come off during the work to be performed later, and the workability is improved. . Since the holes 66 are formed in the bent portions of the locking pieces 64, 65, the bending work is easy.
The structure and functions of other parts are the same as those of the duct connector 10.

Here, the duct connector of the seventh embodiment will be described with reference to FIG. FIG. 11 is an explanatory view showing a duct connector of the seventh embodiment. As shown in FIG. 11 (a), the duct connector 70 of the present embodiment has, as connecting means, a locking hole 72 provided at one end of the strip 71 and inserted into the locking hole 72 at the other end. Locking piece 7 that can be folded
3 is formed. Therefore, as shown in FIG. 11 (b), after the band-shaped body 71 is wound around the flange joint, the connection can be made simply by inserting the locking piece 73 into the locking hole 72 and bending the connection. Is easy and a reliable connection is obtained.

Next, a duct connector of an eighth embodiment will be described with reference to FIG. FIG. 12 is an explanatory view showing the duct connector according to the eighth embodiment. As shown in FIG. 12A, in the duct connector 80 of the present embodiment, notches 84 and 85 are provided near both ends of the band 81, and a bent hole 82 is provided at one end. A possible hanging part 83 is formed.

Therefore, as shown in FIG.
When the cutouts 84 and 85 are engaged with each other and the hanging portion 83 is bent in a U shape, as shown in FIG. 8, the duct suspending tool is engaged with the locking hole 82 to suspend the duct. Since it can be held at, you can save the trouble of attaching a separate auxiliary tool,
Workability on site is improved. At this time, since the hole 86 is formed in the bent portion of the hanging portion 83, the bending operation is easy.

Further, in the case of this embodiment, as shown in FIG. 12B, the hanging portion 83 is preliminarily L-shaped by pressing or the like.
The letter shape can simplify work on site and has the advantage of stabilizing the shape when suspended. It should be noted that even if the hanging portion 83 is previously L-shaped, as shown in FIG.
Since it can be stacked in the state shown in (c), a large space is not required for storage and transportation.

Next, a duct connector of a ninth embodiment will be described with reference to FIG. FIG. 13 is an explanatory view showing a duct connector of the ninth embodiment. As shown in FIG. 13A, in the duct connector 90 of the present embodiment, a locking hole 92 is provided at one end of the band-shaped body 91, and the other end is inserted into the locking hole 92 and folded. A bendable hanger 93 is formed, and the hanger 93 is provided with a locking hole 95 for engaging a bendable tongue 94 and a duct hanger.

Therefore, if the hanging portion 93 is inserted into the locking hole 92 and the hanging portion 93 is bent in a U-shape, then the tongue piece 94 is bent and one end of the band-shaped body 91 is clamped, so that As shown in FIG. 8, a duct hanging tool can be engaged with the locking hole 95.

In the case of the duct connector 90 of the present embodiment, as shown in FIG.
2, the hanging portion 93 can be used in a state of being bent in an L-shape. In this case, when the duct suspending tool is engaged with the locking hole 95 of the suspension portion 93, a load is applied in the surface direction of the suspension portion 93, so that even a relatively large weight can be held. There is.

Next, a duct connector of a tenth embodiment will be described with reference to FIG. FIG. 14: is explanatory drawing which shows the duct connection tool of 10th Embodiment. As shown in this figure, in the duct connector 100 of this embodiment, a locking hole 102 is provided near one end of the strip 101, and the other end can be inserted into the locking hole 102 to be bent. A locking piece 103 is formed, and further, a lockable hole 105 for engaging the bendable hanging portion 104 and the duct hanging tool is provided at the end portion where the locking hole 102 is provided.

Therefore, the locking piece 103 is inserted into the locking hole 102.
After connecting both ends to each other by bending the hanging portion 104 into a U-shape, as shown in FIG. Can be combined.

[0060]

According to the present invention, the following effects can be obtained.

(1) By providing a ring body which can be mounted on the outer periphery of the flange joint portion and a locking portion which is formed on the ring body and can be bent toward the center of the flange, the ring body is joined to the flange joint portion. Since both ducts can be connected to each other only by mounting them on the outer circumference and bending the locking member, the connecting work becomes easy. Further, since there is no part that comes into contact with the air passing through the duct, the heat insulation is not adversely affected, and there is no risk of dew condensation.

(2) By forming the ring body and the locking portion of the duct connecting member from a plate material, punching by a press or the like becomes possible, so that the manufacturing process is greatly simplified and the manufacturing cost is reduced. It is possible to reduce the weight of the duct connector by simplifying the structure.

(3) Since the engaging portion can be bent in a state substantially parallel to the axial direction of the ring body, the strength in the axial direction of the flange required when pressing the flange joint portion becomes large, so that it is strong. A good connection state can be obtained.

(4) By providing the ring body with a holding portion for engaging the flange joint portion and holding the ring body,
Since the ring body attached to the outer periphery of the flange joint is held so as not to move, workability is improved and reliable connection can be performed.

(5) By providing a tongue piece that can be bent toward the center of the flange on the ring body as a holding portion, the ring body can be held by a simple operation just by bending the tongue piece. Workability can be improved.

(6) By providing the ring body with a projection projecting toward the center of the flange, the ring body can be held only by engaging the projection with the flange joint. In addition, since the protrusion does not penetrate deeply into the flange joint, there is an advantage that no gap is formed in the flange joint.

(7) By providing a locking portion for locking the duct hanging member on the ring body, after the fixing of the flange joint is completed, the duct hanging holding member is provided on the locking portion. Since it is possible to hold the duct in a suspended state simply by locking it, it is possible to save the labor of attaching a separate suspending aid and to improve workability on site.

(8) A strip which can be deformed along the outer periphery of the flange joint, connecting means for connecting the ends of the strip, and a lock formed on the strip and which can be bent toward the center of the flange. Providing the parts has a merit that the space required for storage and transportation is small before use, and that the flange joint can be fixed as it is in use even when the flange joint is in close contact.

(9) By forming notches that can be engaged with each other in the vicinity of both ends of the band as connecting means, the connection can be made only by engaging the two with each other. And it can be done quickly.

(10) Since the connecting portion can be held more firmly by providing a locking piece that can be bent and locked to the side edge of the other end on at least one of the ends of the band-shaped body, this is performed after this. It will not come off during work, improving workability.

(11) As a connecting means, by providing a locking hole formed at one end of the belt-shaped body and a locking piece bendable by being inserted into the locking hole formed at the other end. After the band is wound around the flange joint, the connection can be made simply by inserting the engaging piece into the engaging hole and bending the connection, so that the operation is facilitated and a reliable connection state is obtained.

(12) By forming a bendable hanging part having a locking hole for locking the duct hanging tool at the end of the strip, the duct hanging in the locking hole of the hanging part. Since the duct can be held in a suspended state by engaging the tools, it is possible to save the labor of attaching a separate auxiliary tool and improve workability in the field.

(13) By forming slits or holes in the bent portions such as the locking portion, tongue piece, locking piece, and hanging portion, the bending portion is bent with almost no decrease in strength. Work can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a duct connector of a first embodiment.

FIG. 2 is an explanatory diagram showing a use state of the duct coupler.

FIG. 3 is a perspective view showing a use state of the duct coupler.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is a perspective view showing a duct connector of a second embodiment.

FIG. 6 is a perspective view showing a use state of the duct coupler.

FIG. 7 is an explanatory view showing a use state of the duct coupler of the third embodiment.

FIG. 8 is an explanatory diagram showing a use state of the duct coupler of the fourth embodiment.

FIG. 9 is an explanatory view showing a duct connector according to a fifth embodiment.

FIG. 10 is an explanatory view showing a duct connector of a sixth embodiment.

FIG. 11 is an explanatory view showing a duct connector of a seventh embodiment.

FIG. 12 is an explanatory view showing a duct connector of an eighth embodiment.

FIG. 13 is an explanatory view showing a duct connector of a ninth embodiment.

FIG. 14 is an explanatory view showing the duct connector according to the tenth embodiment.

[Explanation of symbols]

10, 20, 30, 40, 50, 60, 70, 80, 9
0,100 Duct connector 14f, 15f Flange 14,15 Duct 11,21,31,41 Ring body 12,22,32,42,54,64,65,73,1
03 Locking piece 13, 23 Slit 16 Flange joint 24, 94 Tongue piece 33 Projecting body 43 Duct suspension tool 44 Locking slit 51, 61, 71, 81, 91, 101 Strip 52, 53, 63, 62 , 84, 85 Notch 72, 92, 95, 102, 105 Locking hole 83, 93, 104 Suspension 86 hole

Front page continuation (72) Inventor Ken Ryuzu 1034-4 Wada, Shinoguri-machi, Kasuya-gun, Fukuoka Kyoritsu Airtech Co., Ltd.

Claims (13)

[Claims] 1. A duct connector for fixing a flange joint when connecting ducts having a flange at an end, comprising: a ring body attachable to an outer periphery of the flange joint; and a ring member formed on the ring body. And a locking portion that is bendable toward the center of the flange. 2. The duct connector according to claim 1, wherein the ring body and the engaging portion are formed of a plate material. 3. A duct connector for fixing a flange joint when connecting ducts each having a flange at an end thereof, wherein the belt joint is deformable along an outer periphery of the flange joint, and the belt joint. Connection means for connecting the ends of the
And a locking portion formed on the band-like body and capable of being bent toward a center of the flange. 4. The duct connector according to claim 2, wherein the locking portion is bendable in a state substantially parallel to an axial direction of the flange. 5. The duct connector according to claim 1, wherein a holding portion is formed on the ring body or the band-shaped body to hold the ring body or the band-shaped body by engaging with the flange joint. 6. The duct connector according to claim 5, wherein the holding portion is a tongue that can be bent toward the center of the flange. 7. The duct connector according to claim 5, wherein the holding portion is a protrusion protruding toward a center of the flange. 8. The duct connector according to claim 1, wherein the ring body or the band-shaped body is provided with a locking portion for locking the duct suspension. 9. The duct connector according to claim 3, wherein the connecting means are notches which are formed in the vicinity of both ends of the belt-shaped body and are engageable with each other. 10. The duct connector according to claim 9, wherein at least one of the end portions of the band-shaped body is provided with a locking piece that can be bent and locked to a side edge of the other end portion. 11. The connecting means is a locking hole formed at one end of the band-shaped body and a locking piece formed at the other end and inserted into the locking hole and bendable. The duct connector according to claim 3. 12. The duct connector according to claim 3, wherein a bendable hanging portion having a locking hole for locking the duct hanging device is formed at at least one end of the band-shaped body. . 13. A slit or a hole for reducing a force required for bending is formed in at least one of the bent portion of the locking portion, the tongue piece, the locking piece, and the hanging portion.
The duct connector according to 2.