JPH048694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a branch duct attachment device (joint) for attaching a branch duct to an air conditioning device or duct.

BACKGROUND ART Conventional examples in which a branch pipe duct is attached to an air conditioner or a duct (abbreviated as duct if necessary) are shown in FIGS. 11 to 13.

Figure 11a shows the flange angle 3 attached to both the duct 1 and the branch pipe duct 2 with studs 4 or iron plate screws 5.
By fixing branch pipe duct 2 to duct 1
Figure b is a cross-sectional view taken along line A-A' in figure a when the flange angle 3 is fixed to both ducts 1 and 2 with studs 4, figure c is a perspective view of the angle 3 attached to the ducts 1 and 2 with studs 4 is a sectional view taken along the line A-A' in FIG.

Figure 12a is a perspective view of the mounting device when both ducts 1 and 2 are connected by alternately bending the contact pieces 7 ₁ and 7 ₂ , and Figure 12b is the same as in Figure 12a. A schematic diagram of the connection part, the same figure c is B- of the same figure a.
It is a sectional view taken along the line B'.

FIG. 13a is a perspective view of the bent piece 7 ₂ of the branch pipe duct 2 fixed to the duct 1 with iron plate screws 5;
Figure b is a sectional view taken along line CC in figure a.

In the example shown in FIG. 11, the angle 3 is attached with rivets 4 or iron plate screws 5 (or bolts). In other words, the drilling process generates chips and dust, making it impossible to perform on-site branching without avoiding noise and electromagnetic noise. Furthermore, since the number of parts used is large and small, there is a high risk of them falling. In addition, workability was poor, and leaks were unavoidable on the metal touch surface. Furthermore, as shown in FIG. 12, the hammering noise, vibration, and dust that inevitably occur when bending iron plates cannot be avoided, resulting in leaks on the mating surfaces.

FIG. 13 has almost the same difficulties as FIGS. 11 and 12. Furthermore, the fixing device shown in FIG. 11 is not removable.

Problems to be Solved by the Invention The present invention does not require any machining other than the opening of the air conditioner or duct, and does not generate electromagnetic noise, noise, vibration, or dust during installation of the branch pipe duct. It is an object of the present invention to provide a branch pipe duct attachment device that can reliably attach a branch pipe duct to an air conditioning device or a duct in a form that allows the number of parts to be attached and removed at all times.

Means for Solving the Problems The present invention is a device for attaching a branch pipe duct to a circular opening formed in an air conditioner or a duct (hereinafter referred to as a duct), in which one end of a first cylindrical body is A bent piece divided and formed by a large number of cut grooves,
A V-shaped groove formed in a perpendicular direction so as to connect the ends of the cut grooves of the bent piece, and a portion separated from the V-shaped groove of the first cylindrical body by at least the wall thickness of the duct etc. A second cylindrical body, with a flange with an edge on one end and an outer surface on the middle part. and an annular bottom portion projecting inward at the other end, the outer diameter of the edged flange is equal to or less than the inner diameter of the winding portion, and a clamp fitting for connecting and fixing the fittings; the fixing fitting is attached to the opening of the duct, etc. and an O-ring by sandwiching the opening and the O-ring between the flange and the bent piece; A gasket is interposed between the flange of the metal fitting and the edged flange of the detachable fitting, and the flange and the edged flange are held by the clamp fitting, so that the fixing fitting and the detachable fitting are connected and fixed, and the fixing fitting and the detachable fitting are connected and fixed. A branch pipe duct is attached to the detachable fitting.

Function The present invention allows the bending piece to be cut into a V shape using a tool such as pliers.
The fixing fitting is fixed to the opening of the duct by simply bending it around the shaped groove, and the detachable fitting is connected and fixed to the fixed fixing fitting with the clamp fitting, and the branch pipe duct can be attached to the detachable fitting.
The seal between the duct, fixing fittings, and detachable fittings can be easily made airtight by using O-rings and gaskets.

In addition, the present invention allows the branch duct to be installed by providing an opening in the duct at any location on-site.
Furthermore, the branch duct can be easily attached and detached, and it can be disassembled and transported.

Embodiment FIGS. 1 to 3 show a fixing fitting for a branch pipe duct installation device of the present invention, and FIG. 1 is a plan view thereof;
Figure 2 is a side view, Figure 3 is the X-
It is an X′-line cross-sectional view. 4 and 5 show the attachment/detachment fitting of the branch pipe duct attachment device of the present invention, FIG. 4 is a plan view thereof, and FIG. 5 is a sectional view taken along the line Y--Y' in FIG. 4.

The branch pipe duct installation device of the present invention includes a fixing fitting 9
and a detachable fitting 10, and the fixing fitting 9 has a cylindrical portion 15.
and a flange 17 with a winding part 23 having a circular cross section at the tip, a bent piece 7 is formed in the cylindrical part 15 by a cut groove 20, and a V-shaped part is formed at the base of the bent piece 7 on the inner surface. A groove 6 is provided, and a shaft 28 is provided in the winding portion 23.
Attach three clamp fittings 11 with a U-shaped cross section that can rotate around the center.

The attachment/detachment fitting 10 has a flange portion 19 with an edge, a cylindrical portion 18 having a protrusion 21 projecting outwardly, and an annular bottom portion 25 protruding inward, and a gasket 13 is attached to the flange portion 19 with an edge. , cylindrical part 18
A heat insulating material 14 held by an annular bottom portion 25 is adhered to the inner surface with an adhesive.

The relationship between the outer diameter d of the edged flange portion 19 and the inner diameter D of the flange 17 of the fixture 9 satisfies D≧d.

Next, a method of attaching the branch pipe duct 2 to the duct 1 will be explained.

As shown in FIGS. 6 and 7, insert the cylindrical part 15 of the fixing fitting 9 into the circular opening of the duct 1,
As shown in FIG. 8, the bent piece 7 of the cylindrical part 15 is bent inward using a bending tool 16 such as pliers so as to hold the opening edge 8 of the duct 1 and the O-ring 12, and then attached to the duct 1 with a fixing metal fitting. Fix 9. A V-shaped groove 6 is formed at the base of the bent piece 7 on the inner surface of the cylindrical portion 15.
, the bending piece 7 can be easily bent.

Next, as shown in FIG. 9 and FIG.
0 is inserted, and as shown in FIG. 10, the winding part 23 and the edged flange part 19 are coupled and connected using the clamp fitting 11. Then, when the branch pipe duct 2 is attached to the protrusion 21 of the cylindrical part 18 of the attachment/detachment fitting 10 with the hose band 22, the branch pipe duct attachment work is completed.

As described above, instead of attaching the branch pipe duct 2 with the hose band 22, a duct made of an iron plate may be attached with an iron plate screw or the like. Further, although the heat insulating material 14 of the detachable fitting 10 is bonded with an adhesive, this heat insulating material 14 may be omitted if necessary.

The duct 1 and the fixing fitting 9 are connected to an O-ring 12, and the fixing fitting 9 and the detachable fitting 10 are connected to each other by a gasket 13, so that airtight sealing performance is maintained.

According to the present invention, the fixing metal fitting can be fixed to the opening of the duct simply by bending it with pliers as described above, and the fixing metal fitting and the detachable metal fitting can be connected and released by simply rotating the clamp metal fitting having a U-shaped cross section.

Therefore, two parts, a fixing metal fitting and a detachable metal fitting, are used, the number of parts is small, it is easy to attach and remove, the workability is improved, it is suitable for dusty places, and noise and electromagnetic noise can be eliminated.

In addition, when the purpose is not to make it easy to attach and detach, but only to reduce the number of parts and simplify the work, the annular part of the detachable fitting and the fixing fitting should be made continuous and integrated.
Clamp fittings are not required and can be made into one piece.

Effects of the Invention The present invention has the following advantages: (1) Since the process is simply bent using a bending tool, processing can be performed quietly and does not damage the equipment to which it is attached. (2) The number of parts is small, so parts management is simplified. (3) It is easy to attach and detach because it is only connected with clamp fittings, (4) There are no small parts, so on-site work management and safety are improved, (5) Weak materials such as those made of FRP (6) The number of parts is small and the connection structure is simple, which improves work efficiency. (7) Satisfies insulation performance at the same time as branching. (8) ) Ideal for clean rooms, communication rooms, etc. where dust is averse; (9) variable duct systems can be created in a short construction period to accommodate layout changes in factories and experimental facilities; (10) applicable to branch ducts of all shapes, especially In the case of a round duct, there are no restrictions on the mounting position.

[Brief explanation of drawings]

1 to 10 show the branch pipe duct installation device of the present invention, FIG. 1 is a plan view of the fixing fitting, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an X of FIG. −
X' line sectional view, Figure 4 is a plan view of the attachment/detachment fitting, Figure 5
The figure is a sectional view taken along the Y-Y' line in Figure 4, Figure 6 is a perspective view of the duct with the fixing fittings attached, Figure 7 is a sectional view taken along the Z-Z' line in Figure 6, and Figure 8 is a sectional view taken along the Z-Z' line in Figure 6. An explanatory diagram of fixing the fixture to the duct with a bending tool, FIG. 9 is a cross-sectional view of the fixture and the detachable fixture connected, and FIG. 10 is a cross-sectional view of the branch pipe duct attached to the duct. Figures 11 to 13 show examples of conventional branch pipe duct attachment devices, and Figure 11a
11 is a perspective view of an example in which a branch pipe duct is attached to a duct at an angle, FIG. 11b is a sectional view taken along the line A-A' in FIG. 11a, and FIG. FIG. 12a is a perspective view of an example in which a branch pipe duct is attached to a duct using each bent piece;
Figure b is an explanatory diagram of the folded piece, and figure c is B- in figure a.
A cross-sectional view taken along line B' is shown. FIG. 13a is a perspective view of an example in which a branch pipe duct is attached to a duct using a bent piece thereof, and FIG. 13b is a sectional view taken along line C-C' in FIG. 13a. 1: Air conditioning equipment or duct, 2: Branch pipe duct,
3: Angle for flange, 4: Stud, 5: Iron plate screw, 6: V-shaped groove, 7: Bent piece, 7 ₁ : Bent piece for duct, 7 ₂ : Bent piece for branch pipe duct, 8: Air conditioning equipment or duct opening edge, 9: Fixing metal fittings, 10: Detachable metal fittings, 11: Clamp fittings, 12: O-ring,
13: Gasket, 14: Heat insulating material, 15: Cylindrical part of fixing metal fitting, 16: Bending tool, 17: Fixing metal flange, 18: Cylindrical part of detachable metal fitting, 19: Flange part with edge, 20: Cut groove, 21: Projection Part, 2
2: hose band, 23: winding part of flange 17, 24: shaft of clamp fitting, 25: annular bottom part.

Claims (1)

[Claims] 1. Air conditioning equipment or duct (hereinafter referred to as duct, etc.)
A device for attaching a branch pipe duct to a circular opening formed in a cylindrical body, the device comprising: a bent piece formed by dividing one end of a first cylindrical body by a number of cut grooves; A V-shaped groove formed in the orthogonal direction so as to connect the ends, and a portion of the first cylindrical body that is separated from the V-shaped groove by at least the wall thickness of the duct etc. are bent at 90 degrees, and the tip thereof a second cylindrical body, having a flange with an edge at one end, a protrusion protruding outwardly at the middle part, and a second cylindrical body; a detachable fitting having an annular bottom projecting inward, the outer diameter of the edged flange being equal to or less than the inner diameter of the winding portion; and a clamp fitting for connecting and fixing the fixing fitting and the detachable fitting. The fixing fitting is attached to the opening by sandwiching the opening of the duct, etc. and the O-ring between the flange and the bent piece, and the flange of the fixing fitting and the edge of the detachable fitting are attached to the opening. By interposing a gasket between the flange and the flange and sandwiching the flange and the edged flange with the clamp fitting, the fixing fitting and the detachable fitting are connected and fixed, and a branch pipe duct is attached to the detachable fitting. A branch pipe duct installation device characterized by: