JPH0129354Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention uses a flange with an L-shaped cross section in a duct formed by a conventional angle, and a flange in which the duct body member is bent into a substantially U-shaped cross section. Regarding clamps that connect ducts by fixing them with one touch.

(Conventional technology) The conventional duct flange shape is made by constructing a frame with angle materials, etc., attaching this to the duct body, making the cross section L-shaped, and then tightening and fixing the entire circumference of the flange with bolts. was.

In addition, in recent years, there are some products in which the end of the duct body member is bent to form a flange, but in order to increase the strength of the flange, the end of the flange is bent again to have a roughly U-shaped cross section. To connect these, the L-shaped flanges or the L-shaped and U-shaped flanges were faced together and bolted.

(Problem that the invention aims to solve) Conventionally, in order to tighten bolts around the entire circumference of this flange, a considerable number of bolts had to be tightened even at a single joint, which was extremely time-consuming for the entire length of the duct. In particular, when bolting flanges with L-shaped and U-shaped cross sections, it is difficult to insert a large tool or a tool into the U-shaped flange, making it difficult and time-consuming to remove the bolts.

(Means for solving the problem) In order to solve this conventional problem, in the present invention, the flange shape of the duct is made to face each other with an L-shaped cross section and a roughly U-shaped one. The purpose of this invention is to provide a duct connection clamp that can be fixed with one touch.As a technical means for that purpose, the present invention uses a flange with an L-shaped cross section formed by an angle or the like at the end of the duct, and a flange of the flange. Omit the tip
The flat part where the clamp that connects the ducts comes into contact with the L-shaped flange by bending the flanges by 90 degrees and providing a horizontal reinforcing part with a substantially U-shaped cross section, and the tip of the flat part being horizontally connected. a horizontal part that is bent to abut against the horizontal reinforcing part, and a folded part that is folded back to face the flat part and forms an inlet for the flange with the tip of the flat part, and The flanges are fixed to each other by the horizontal part, the folded part, and the folded part.

(Function) Therefore, in the duct connection clamp of the present invention, the flat part, the horizontal part, and the folded part are formed continuously,
Since the inlet of the duct flange is formed at the tip of the flat part and the folded part, insert the inlet of the clamp into the horizontal reinforcement part of the duct flange, which has a U-shaped cross section, and connect the tip edge of the flat part to the tip of the L-shaped duct flange. When the flat part comes into contact with the clamp and the flat part is pulled up, the clamp moves deeply by itself due to the spring action, and the horizontal part of the clamp is attached to the horizontal reinforcing part of the duct.Moreover, the flat part and the folded part of the clamp connect the duct flanges together. Crimp. Therefore, by setting this clamp from all sides of the duct, the duct is completely fixed.

As shown above, with this clamp, you only need to insert the guide into the horizontal reinforcing part and raise it, so you can connect ducts by fixing flanges of different shapes with one touch without having to remove bolts all around the duct flange. I can do it.

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

The duct connecting clamp (hereinafter referred to as "clamp") 1 of the present invention is made of a rigid thin metal plate and has a flat part 2, a horizontal part 3, and a folded part 4 continuously formed integrally.

The flat portion 2 is formed by bending one end of the horizontal portion 3 toward the inner end by approximately 90 degrees. The folded portion 4 is similarly folded inward while providing a crowning portion 5 at the other end of the horizontal portion 3. The flat part 2 is formed so that when the duct is set on the side of the flange 6 having an L-shaped cross section, the middle of the flat part 2 is slightly warped outward so that the tip 7 of the flat part 2 comes into contact with the flange 6.

The tip 8 of the folded portion 4 is slightly bent outward to form a flange introduction port 9, and this bent portion serves as a crimping portion 11 for pressing a flange 10 having a U-shaped cross section. A smooth curved surface section 12 is formed from the crimp section 11 to the crown attachment section 5, so that there is no resistance during insertion. In addition, 13 is a horizontal reinforcement part of the flange 10, 14 is a packing, 1
5 is the duct body, and 16 is the angle.

The clamp 1 of this embodiment is inserted from the side of the flange 10 having a U-shaped cross section. That is, the inlet 9 is inserted into the horizontal reinforcing part 13 with the crowning part 5 facing the duct main body 15 side. Then, when the tip 8 of the folded part 4 reaches the flange 10, when the crowning part 5 is pulled horizontally, the curved part 12 slides while pressing against the flange 10, and the end of the horizontal reinforcing part 13 is brought into contact with the crown. After being inserted into the fitting part 5, it snaps into place due to the spring action. Note that FIG. 1 shows a state in which the ducts are connected to each other using a plurality of clamps 1 on one side of the duct flange.

As described above, this clamp 1 can fix flanges of different shapes of ducts with one touch. Furthermore, since there is no need to bolt bolts all the way around the flanges, it is easy to connect them to existing ducts.

Further, since this clamp can be formed integrally by bending a thin metal plate, it can be manufactured lightweight and at low cost.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and the present invention may be modified without departing from the gist of the invention. included in the technical scope of

For example, as shown in FIG. 4, the horizontal portion 17 may be bent into a circular shape, or as shown in FIG. It may also be bent into an arc.

Further, as shown in FIGS. 6 and 7, a protrusion 20 is provided on the flat part 2 of the clamp 1 facing inward, and the protrusion 20 is fitted into a small hole 21 formed in the L-shaped flange. Therefore, even if the duct experiences severe vibrations, the clamp 1 will not come off. Furthermore, by removing bolts 22 from the four corners of the flange, it is also possible to connect the central portion with one clamp 1.

In addition, as shown in FIG. 8, the flat part 2 of the clamp 1
A bent portion 23 may be provided at the tip 7 of the L-shaped flange, and the bent portion 23 may be engaged with a protrusion 24 provided on the L-shaped flange.

(Effects of the Invention) As explained above, according to the present invention, by having the above-described configuration, the flanges of different ducts can be fixed with one touch to connect the ducts. Further, since the structure is simple, there is an advantage that it can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view of the clamp showing the set state, Fig. 3 is an explanatory view showing the same assembly order, Figs. 4, 5, and 6.
7 and 8 are explanatory diagrams showing other embodiments. 1... Clamp for duct connection, 2... Flat part,
3...Horizontal part, 4...Folded part, 6...Flange (flange with L-shaped cross section), 7...Tip, 9
...Introduction port, 10...Flange (flange with approximately U-shaped cross section), 13...Horizontal reinforcement section, 15...Duct body (duct), 16...Angle.

Claims (1)

[Scope of utility model registration request] The cross section formed by an angle etc. at the end of the duct is L.
A clamp that connects the ducts by meeting a letter-shaped flange and a flange having a substantially U-shaped cross section with a horizontal reinforcing portion bent by about 90 degrees at the tip of the flange comes into contact with the L-shaped flange. A flat part, a horizontal part that is brought into contact with the horizontal reinforcing part by bending the tip of the flat part horizontally, and a horizontal part that is folded back to face the flat part and a tip of the flat part that forms the inlet of the flange. It is formed with a folded part to form,
A clamp for duct connection, characterized in that flanges are fixed to each other by the flat part, the horizontal part, and the folded part.