JP3457063B2 - Air conditioning duct connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning duct connecting device.

[0002]

2. Description of the Related Art Conventionally, the connection between an air conditioner and a duct connected to the air conditioner is carried out at a construction site by fitting an end portion of the duct connected to the connection pipe which is previously attached to one end of the air conditioner.
After connecting the connecting pipe and the duct by tightening with a screw or the like, a tape is wound around the outer periphery of the connecting portion to complete the connecting work.

[0003]

For this reason, there is a problem in that a tightening work using a tool such as a screwdriver is required in a narrow ceiling and the work is troublesome. Therefore, when connecting a duct that turns into a spiral rib on the outer periphery of the joint formed into a tubular shape by spirally winding a tin plate or other metal plate and joining the joint, this spiral It may be possible to easily connect the duct to the air conditioner at the construction site by using the rib of. It is an object of the present invention to provide a simple duct connecting device using this rib.

[0004]

In order to achieve such an object, the present invention provides a device for connecting an air-conditioning duct according to claim 1, which is fitted onto the outer circumference of a connecting pipe provided in an air conditioner to form an outer circumference. In an air conditioning duct connecting device for connecting a duct having spiral ribs, a rib protruding in the radial direction of the connecting pipe is provided on the outer periphery of the connecting pipe, and an annular tightening metal fitting is provided so as to surround the rib. Mounting, the annular tightening fitting is configured to have an outer peripheral portion and both side portions and a notch on one side portion thereof,
The end portion of the spiral rib of the duct is screwed into the tightening fitting through the notch. A connecting device for an air conditioning duct according to a second aspect is the connecting device for an air conditioning duct according to the first aspect, characterized in that packing is provided between the rib and an end edge of the duct.

[0005]

In the air-conditioning duct connecting device having the above structure, the end of the spiral rib on the outer circumference of the duct is provided on the annular fastening metal fitting provided on the outer circumference of the connecting pipe of the air conditioner. The duct can be easily connected to the air conditioner by simply screwing it into the tightening fitting through the notch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of carrying out the present invention will be described with reference to the attached drawings. In the drawings, reference numeral 1 denotes an air conditioner having a connecting pipe 2 attached to one end thereof, 3 denotes a duct fitted around the outer periphery of the connecting pipe 2, and the duct 3 has a spiral rib 4 on the outer periphery thereof. The spiral ribs 4 of the duct 3 are formed on the outer circumference of the goby-folding portion that is formed when a tin plate or other metal plate is spirally wound and the joining portion is goby-folded to form a tubular shape.

On the outer periphery of the connecting pipe 2, a part of the connecting pipe 2 is bulged outward to form a rib 5 projecting in the diametrical direction of the connecting pipe 2, and the rib 5 is surrounded. An annular tightening fitting 6 was attached. The fastening metal fitting 6 has a U-shaped cross section including an outer peripheral portion 6a and both side portions 6b and 6b. A notch 6c is provided on one side portion 6b of the fastening metal fitting 6, and the fastening metal fitting 6 has an annular shape. Partly cut off, and the flanges 6d, 6d are attached to both sides of the cut off end.
Was tightened with a screw 7 to form an annular shape. still,
The fastening metal 6 has a U-shaped cross section, but it is not limited to the U-shaped, and needless to say, it may have an inverted U-shaped, C-shaped or other shape. Then, the duct 3 is connected to the air conditioner 1 by screwing the ends of the spiral ribs 4 of the duct 3 into the fastening fitting 6 through the notch 6c.

In the drawing, 8 shows an annular packing provided between the rib 5 and the edge 3a of the duct 3, but the packing 8 may be omitted. In this case, by applying the same tape 10 as that conventionally used to the outer circumference of the connecting portion between the air conditioner 1 and the duct 3, the connecting portion can be sealed. It should be noted that a notch 6e similar to the notch 6c is provided at a position where the notch 6c of the tightening metal 6 is in a diametrical line shape, and a wedge 9 is inserted from the notch 6e into the tightening metal 6 in the arrow direction. If you type in, the connection will be more stable.
The screwing of the ends of the spiral ribs 4 of the duct 3 into the fastening fitting 6 may be performed by rotating the duct 3, or by rotating the fastening fitting 6. Is also good. When the screw 3 at the end of the spiral rib 4 is screwed into the tightening metal fitting 6 by rotating the duct 3 or rotating the tightening metal fitting 6, By slightly twisting so as to cause deformation, the contact pressure between the spiral ribs 4 and 5 is increased, and the end of the spiral rib 4 is disengaged from the tightening fitting 6 by the contact pressure. Can be prevented. Further, in the case where the packing 8 is provided, the elastic deformation of the packing 8 is further applied to prevent the ends of the spiral ribs 4 from coming off from the tightening fitting 6.

[0009]

As described above, according to the present invention, the end of the spiral rib on the outer periphery of the duct is provided so as to surround the rib projecting in the radial direction of the connecting pipe of the air conditioner. You can easily connect the duct to the air conditioner by simply screwing it into the tightening fitting through the notch in the fitting, and in a narrow construction site compared to the one using conventional screws. If the packing is provided between the rib and the duct edge, the duct connecting portion can be sealed by the packing, and air leakage from the duct can be easily prevented.

[Brief description of drawings]

FIG. 1 is an end view of an embodiment of the present invention.

FIG. 2 is a side view with a part of FIG. 1 removed.

FIG. 3 is a perspective view of a main part

FIG. 4 is a side view showing a state before connection.

[Explanation of symbols]

1 Air conditioner 2 Connection pipe 3 duct 4 rib 5 Rib 6 Tightening bracket 8 packing

Claims (2)

(57) [Claims] 1. A connecting device for an air-conditioning duct, which is externally fitted to the outer periphery of a connecting pipe provided in an air conditioner to connect a duct having a spiral rib on the outer periphery of the connecting pipe. A rib protruding in the radial direction is provided, and an annular tightening metal fitting is attached so as to surround the rib, and the annular tightening metal fitting is provided with an outer peripheral portion and both side portions and a notch on one side portion thereof. A connecting device for an air-conditioning duct, characterized in that the end portion of the spiral rib of the duct is screwed into the tightening fitting through the notch. 2. The air-conditioning duct connection device according to claim 1, wherein packing is provided between the rib and the end edge of the duct.