JP2558554Y2 - Duct fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct joint used for connecting a spiral duct or the like for guiding air for air conditioning and ventilation in a building air conditioner.

[0002]

2. Description of the Related Art Conventionally, when a spiral duct or the like is connected in an air conditioning system, a sealing agent is filled in the connection portion in order to maintain the airtightness of the connection portion of the joint, and the connection portion is securely stopped by rivets or iron screws. It is connected and the outer periphery of the part is double-wrapped with tape.

[0003]

When connecting ducts of an air conditioner as in the above-mentioned prior art, a plurality of types of operations such as filling with a sealant, riveting, and tape winding are involved, so connection work is troublesome. It was inefficient. The present invention eliminates the need for sealing agent filling, riveting, tape winding, etc. when connecting air conditioning ducts, making it easier to connect ducts without having to be a skilled worker. The purpose is to be able to reduce the time.

[0004]

According to the present invention, in order to achieve the above-mentioned object in a duct joint for connecting a duct or the like, the present invention jumps inward in the axial direction at several places on the outer periphery of a connection tube portion of the joint. A spring-like locking member was attached, and a non-slip was provided on the outer surface of the spring. Further, an annular concave portion is provided at an inner position in the axial direction from the mounting position of the locking member on the outer periphery of the connection cylinder portion, and the outer diameter of the annular concave portion is increased toward the inner side in the axial direction. An elastically deformable annular gasket that was compressed and pushed was provided.

[0005]

When connecting ducts using the above-described duct joints, the end portions of the ducts to be connected to the outer periphery of each connection tubular portion of the duct joints may be inserted. The inserted end of the duct is tilted down until the latching member that has jumped up comes into contact with the outer peripheral surface of the connection cylinder, and the gasket is also compressed and pushed into the annular recess. For this reason, since the friction between the non-slip at the outer end of the locking member and the inner peripheral surface of the pushed-in duct is large, the end of the duct does not come off, and a separate work such as riveting is not required. . In addition, the annular gasket that can be expanded and contracted has an outer diameter that is increased toward the inside in the axial direction, and at the time of connection, an annular concave portion corresponding to the outer peripheral surface of the connection cylindrical portion of the joint, and the inserted inner peripheral surface of the duct. Since it is compressed and pressed into the annular concave portion and pressed against both surfaces, sufficient airtightness can be maintained without separately filling the sealant.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The duct joint 1 of this embodiment has a T-shape having three connecting cylinders 2 communicating with each other.
The number is not limited to this, and may be applied to an elbow socket or the like in addition to a spiral joint such as a cheese joint. A plurality of locking members 3 are arranged at equal intervals on the outer circumference of each connection cylinder 2 at symmetrical positions on the diameter of the connection cylinder 2.

Each locking member 3 is formed of a spring material, and its base is attached to the outer periphery of the connecting cylinder 2 by welding or the like, and is arranged so as to jump upward in the axial direction of the connecting cylinder 2. The size of each locking member 3 is, for example, 10 m in width.
m, the overall length is 30 mm, and the raised end of the locking member 3 is formed slightly wider than the base, and a non-slip 3a is provided on the outer surface thereof. When the spiral duct 4 to be connected is inserted into the connection tube portion 2 of the joint, the entirety of the locking member 3 falls down against the spring force until it comes into contact with the outer peripheral surface of the connection tube portion 2, and the slip stopper 3 a is formed. The friction with the inner peripheral surface of the spiral duct 4 prevents the spiral duct 4 from slipping out.

At a position axially inward of the position where the locking member 3 is disposed in the connecting cylinder portion 2, for example, a width of 10 mm and a depth of 5 m
m annular concave portion 5 is provided, and the annular concave portion 5 is provided with an annular gasket 6 that can expand and contract. Gasket 6
Has a larger outer diameter toward the inner side in the axial direction, and when the spiral duct 4 to be connected is inserted, it is compressed and enters the annular concave portion 5, and the inner peripheral surface of the spiral duct 4 and the connecting cylindrical portion 2 are formed. The airtightness with the outer peripheral surface is maintained. An annular rib 7 is provided on the outer periphery of the connection cylinder portion 2 at a position axially inward of the annular recess 5 so as to regulate the insertion amount of the spiral duct 4 to be connected. The insertion length of the spiral duct 4 varies depending on its outer diameter size. For example, when the outer diameter is 100 to 125 mm, when it is 150 to 300 mm, it is 325 to 1000 m.
m, respectively, the insertion length is 70m
m, 90 mm and 110 mm.

[0009]

According to the duct joint of the present invention, when the duct is connected, if the end of the duct is inserted into the connection tube of the joint, the locking member falls down by the inserted end of the duct.
The non-slip provided thereon can prevent the duct from coming off, and does not require a separate riveting operation. Also, by the inserted end of the duct, the expandable and contractible annular gasket is compressed and pushed into the annular concave portion, and the annular gasket is pressed into contact between the inner peripheral surface of the inserted duct and the connection cylinder. Since the airtightness is maintained, there is no need to separately fill the connecting portion with a sealing agent or wrap the outer periphery of the connecting portion with a tape. As described above, according to the present invention, the work of connecting the ducts is simplified, the work can be easily performed without a skilled worker, the construction accuracy can be made uniform, and the construction time can be further reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a duct joint of the present invention.

FIG. 2 is a plan view of a locking member of the duct joint and a side view showing a mounting position thereof.

FIG. 3 is a cross-sectional view of two states in which a duct end is inserted into a duct joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duct joint 2 Connection cylinder part 3 Locking member 5 Annular concave part 6 Gasket

Claims (1)

(57) [Scope of request for utility model registration] 1. A duct joint having a plurality of connecting cylinders for air-tightly connecting a duct or the like, a spring-like locking member which is raised inward in the axial direction at several locations on the outer periphery of the connecting cylinder. the mounting Rutotomoni, on wings of the locking member
The slip provided on the outer surface that Tsu and an annular recess in the axially inner position than the mounting position of the locking member of the connecting tube portion outer periphery, to the annular recess, axially inwardly
The outer diameter is formed larger toward
A duct joint characterized by having an expandable and contractible annular gasket which is compressed and pushed into a portion .