JPH064534U - Flexible joint material for ducts - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention uses a pair of flange members having a large width while being able to securely fix the canvas to the pair of flange members without cutting or coming off. It is to obtain a flexible joint material for a duct that can be used. [Structure] A pair of strip-shaped flange members each having a U-shaped mounting portion at one end, and a sheet material having both side surfaces inserted into the mounting portions of the pair of flange members. A band-shaped canvas and a large number of saws for preventing the canvas from coming off, which are formed at a predetermined interval by using a male type and a female type in the mounting portion of the pair of flange members into which both side surfaces of the canvas are inserted. The toothed caulking dowel forms a flexible joint material for a duct.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flexible joint material forming a main part of a flexible joint for a duct.

[0002]

[Prior art]

 A conventional flexible joint material for a duct is a belt-shaped canvas in which a single-sided aluminum foil glass cloth and a flameproof sheet are superposed, and one side of the belt-shaped canvas is wound and fixed on one side. One flange member whose width is less than half the width of the canvas, and the other flange member whose width is less than half the width of one side of the canvas fixed to one side by winding. It consists of and.

[0003]

[Problems to be solved by the present invention]

 In the conventional flexible joint material for ducts, the canvas and one flange member and the other flange member are fixed by rivet caulking, which requires a lot of work and requires a large thickness at the fixed portion. There was a drawback that

In view of the above-mentioned conventional drawbacks, the present invention is for a duct in which the canvas and the flange member can be easily and reliably fixed and the thickness of the fixed portion can be reduced. The purpose is to provide a flexible joint.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a pair of strip-shaped flange members each having a U-shaped mounting portion at one end, and both side surfaces are respectively inserted into the mounting portions of the pair of flange members. A strip-shaped canvas formed of a sheet material, and a canvas formed at a predetermined interval by using a male mold and a female mold in the attachment portion of the pair of flange members into which both side surfaces of the canvas are inserted. A flexible joint material for ducts is composed of a large number of serrated dowels for caulking that prevent slipping out.

[0006]

[Action]

 In the flexible joint material for ducts configured as described above, since the caulking dowels for caulking that are formed on the mounting portions of the pair of flange members bite into the canvas, the canvas and the pair of flange members come off. Never.

[0007]

[Examples of the present invention]

 Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 12, 1 is a flexible joint material for a duct of the present invention, and the flexible joint material 1 for a duct is a belt-shaped canvas 2 and a belt-shaped member. One end is fixed to both side surfaces of the canvas 2, and the other end is composed of a pair of flange members 3 and 3 overlapping each other.

As shown in FIG. 3, the strip-shaped canvas 2 is made by sewing one side aluminum foil glass cloths 4 and 4 facing each other and sewn, or one side aluminum foil glass cloth 4 and nylon tape as shown in FIG. -A sewn porin 5 is used.

As shown in FIG. 5, the pair of flange members 3 and 3 are made of a strip-shaped zinc iron plate having a mounting portion 7 bent in a U shape at one end through an inclined surface 6. .

The both side surfaces of the canvas 2 and the pair of flange members 3, 3 are fixed by inserting the both side surfaces of the canvas 2 into the mounting portions 7, 7 of the pair of flange members 3, 3. As shown in FIGS. 6 and 7, a large number of saw-tooth-shaped caulking dowels 10 formed at predetermined intervals are fixed to Nos. 7 and 7 so as not to slip out. This saw-toothed caulking dowel 10 is formed by using a saw-toothed male die 8 and a female die 9 for receiving the male die 8.

The duct flexible joint member 1 configured as described above is opened as shown in FIG. 8, and the pair of flange members 3 and 3 are provided with folds 11 and 12 as shown in FIG. Four cut portions 13, 13, 13, 13 are formed at intervals. Then, as shown in FIG. 10, the end portion is bent at a substantially right angle with a roll forming machine as well as the rectangular tube. Next, locate the corner pieces 14, 14, 14, 14 at the corners and fix the tips by caulking as shown in FIG. 15 is fixed by crimping. Thereafter, as shown in FIG. 12, the overlapped connecting portions of the canvas 2 are closed with a staple at predetermined intervals, and an adhesive tape 17 is fixed on the closed connecting portion, whereby the duct flexible joint 18 is completed.

[0013]

[Different embodiment of the present invention]

 Next, another embodiment of the present invention shown in FIGS. 13 to 18 will be described. In the description of these different embodiments of the present invention, the same components as those of the first embodiment of the present invention will be designated by the same reference numerals, and the duplicated description will be omitted.

The second embodiment of the present invention shown in FIGS. 13 to 15 is mainly different from the first embodiment of the present invention in that the ends of the canvas 2 do not overlap each other. Even with the duct flexible joint member 1A formed in this way, the same effects as the first embodiment of the present invention can be obtained in that the pair of flange members 3 and 3 are fixed.

The third embodiment of the present invention shown in FIGS. 16 to 18 is mainly different from the first embodiment of the present invention in a pair of flange members 3A and 3A. As 3A and 3A, those in which U-shaped mounting portions 7 and 7 are directly formed without using an inclined surface at one end are used. Even when the duct bending using the pair of flange members 3A and 3A formed in this way and then the member 1B is performed, the same effect as that of the first embodiment of the present invention can be obtained.

[0016]

[Effect of the present invention]

 As is clear from the above description, the following effects can be obtained in the present invention.

(1) A pair of belt-shaped flange members each having a U-shaped mounting portion at one end, and a sheet material having both side surfaces inserted into the mounting portions of the pair of flange members. The formed strip-shaped canvas and the pair of flange members into which both side surfaces of the canvas are inserted are attached at a predetermined interval by using a male mold and a female mold to prevent the canvas from coming off. Since it is composed of a large number of saw-toothed caulking dowels, it is possible to securely fix the pair of flange members and the canvas to prevent them from coming off. Therefore, it is possible to efficiently prevent the generation of defective products.

(2) According to the above (1), since the caulking dowels having a saw-tooth shape are formed by using the male type and the female type, it is possible to reliably prevent a problem such as cutting of the canvas. Wear. Therefore, the number of defective products is small and the cost can be reduced.

(3) According to the above (1), since the tip end portions of the pair of flange members are overlapped with each other, it is possible to use the pair of flange members having a large width dimension.

(4) According to claims 2 and 3, the same effects as (1) to (3) can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a side view showing the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a canvas.

FIG. 4 is an explanatory diagram of another embodiment of the canvas.

FIG. 5 is an explanatory view of a flange member.

6 and 7 are explanatory views of a fixed portion between the canvas and the pair of flange members.

FIG. 8 is an explanatory diagram of an open state.

FIG. 9 is an explanatory diagram of a state in which a fold is formed on a pair of flange members.

FIG. 10 is an explanatory view of a state in which a pair of flange members are bent.

FIG. 11 is an explanatory view of a state where a corner piece is attached.

FIG. 12 is an explanatory view showing a state where the connecting portion of the canvas is fixed with a staple.

13 to 15 are explanatory views showing a second embodiment of the present invention.

16 to 18 are explanatory views showing a third embodiment of the present invention.

[Explanation of symbols]

1, 1A, 1B: Flexible joint material for duct, 2: Canvas, 3A: Flange member, 4:
Single-sided aluminum foil glass cloth, 5: nylon tarpaulin, 6: inclined surface, 7: mounting part, 8: male type, 9: female type, 1
0: Saw-toothed dowel for crimping, 11, 12: Fold,
13: Cut part, 14: Corner piece, 15: Flange fixing metal fitting, 16: Stapling needle, 17: Adhesive tape, 18: Flexible joint for duct.

Claims (3)

[Scope of utility model registration request] 1. A pair of strip-shaped flange members each having a U-shaped mounting portion at one end, and a pair of side surfaces inserted into the mounting portions of the pair of flange members.
A strip-shaped canvas made of a sheet material and a pair of flange members into which both side surfaces of the canvas are inserted are attached at predetermined intervals by using a male mold and a female mold. A flexible joint material for a duct, comprising a large number of saw-toothed caulking dowels for prevention. 2. A pair of strip-shaped flange members each having a mounting portion bent at one end into a U shape via an inclined surface,
Both side surfaces are respectively inserted into the mounting portions of the pair of flange members, and the strip-shaped canvas formed of a sheet material in which the tip ends of the pair of flange members are overlapped with each other, and the pair of both side surfaces of the canvas are inserted. For a duct characterized by comprising a large number of saw-toothed caulking dowels for preventing the canvas from coming off, which are formed at predetermined intervals in the mounting portion of the flange member of the male type and the female type. Flexible joint material. 3. A pair of belt-shaped flange members each having a mounting portion bent at one end into a U shape via an inclined surface,
A strip-shaped canvas in which both side surfaces are respectively inserted into the mounting portions of the pair of flange members so as to face each other, and the pair of flange members in which both side surfaces of the canvas are inserted are mounted. A flexible joint material for a duct, comprising a plurality of saw-toothed caulking dowels formed at predetermined intervals using a male mold and a female mold to prevent the canvas from coming off.