JPS6339508Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device for fixing joints in double-pipe air supply and exhaust pipes attached to combustion appliances such as stoves and gas water heaters.

[Conventional technology]

As shown in Fig. 1, the supply and exhaust pipe of a combustion appliance has a receiving port 02 formed at one end of a cylinder 01 processed to a regular length, and an insertion port 04 formed in another pipe within this receiving port 02. At the same time, ring-shaped ribs 05 and 06 are formed on the socket 02 side and the socket 04, respectively, and a C ring (stop ring) 0 with a rounded cross section straddles the ribs 05 and 06.
7 is fitted to prevent it from falling out.

[Issue to be solved]

However, in the case of the above C-ring 07, especially when the diameter is 150 mm or more, the C-ring 07 that straddles the ribs 05 and 06 will easily come off, which is very dangerous.

As a means to solve this problem, C ring 0
It would be better to increase the elasticity of item 7, but increasing the elasticity in this way requires a large amount of force when installing and removing it.
There is a problem that connection work is difficult.

The purpose of the present invention is to propose a fixing device for joints in intake and exhaust pipes that can be securely fixed even for diameters of 150 mm or more and that are easy to connect.

[Means to solve the problem]

As a means for achieving the above object, the present invention proposes a fixing device having the following configuration.

A socket is formed at one end of the supply/exhaust pipe, and a push-in port with a diameter that can be inserted into another socket is formed on the opposite side of the socket, and an outer periphery with a semicircular cross section is formed on the inner peripheral surface of the socket. forming an outer circumferential groove with a semicircular cross section on the outer circumferential surface of the insertion port;
A part of the inner circumferential groove formed in the receiving opening is cut out to provide a through hole, and one end of a wire made of an elastic material and having a circular cross section that fits in the inner circumferential groove is exposed from the through hole and is received. The wire goes around the inner circumferential groove of the opening, and the other end thereof is exposed through the through hole, and the wire is engaged with a tightening fitting on the outside of the receiving opening, and the wire is tightened by a lever of the tightening fitting. 1. A fixing device for a joint in an air supply/exhaust pipe, characterized in that the diameter of the wire is reduced by pulling the wire so that a part of the cross section of the wire falls within the outer circumferential groove.

[Effect]

The above-mentioned fixing device involves inserting the insertion opening of another cylinder into the receiving opening of the other cylinder, aligning the inner circumferential groove with the outer circumferential groove, and then operating the lever of the tightening fitting to pull up one end of the wire. aperture. In this way, the wire extends from the inner circumferential groove to the outer circumferential groove, and as a result, the receiving opening and the insertion opening are fixed. Of course, the dimensions and shapes of the inner circumferential groove, the outer circumferential groove, and the diameter of the wire are designed so as to achieve the above-mentioned effect.

〔Example〕

Hereinafter, specific embodiments of the present invention will be described based on the accompanying drawings.

FIG. 2 is a perspective view showing the main parts of an air supply and exhaust pipe according to the present invention, in which one air supply and exhaust pipe 1 has a receiving opening 2 and an insertion opening 3 on the opposite side. . An inner circumferential groove 4 is provided on the inner circumferential surface on the side of the socket 2.
A wire 5 is inserted into the inner circumferential groove 4. One end of the wire 5 engages with a through hole 4' formed by cutting out a portion of the inner circumferential groove 4, and the other end goes around the inner circumferential groove 4 and enters the through hole 4'.
It is pulled out from the receiving opening 2 and connected to the fastening fitting 6.

The tightening fitting 6 can pull out one end of the wire 5 by pulling a lever 7, thereby deforming the wire 5 in the direction of a smaller diameter. Note that since the wire 5 in this embodiment is made of SUS304, it has sufficient elasticity, and when the lever 7 of the fastening fitting 6 is loosened, it deforms in the direction of the larger diameter and fits tightly into the inner circumferential groove 4.

Reference numeral 8 denotes an outer circumferential groove formed on the outer circumferential surface of the insertion opening 3, which faces the inner circumferential groove 4 when the insertion opening 3 is inserted to a predetermined position within the receiving opening 2.

FIG. 3 is a partial cross-sectional view of the insertion port 3 inserted into the receiving port 2 and fixed using a wire 5. When the insertion port 3 is inserted into the receiving port 2 to a predetermined position, the inner circumferential groove 4 and the outer circumferential groove 8 face each other. In this state, the lever 7 of the tightening fitting 6
When the wire 5 is deformed in the direction of the smaller diameter by pulling ,
A portion of the wire 5 enters the outer circumferential groove 8. As a result, the insertion port 3 side does not come out and is completely fixed. Next, in order to release this fixation, the lever 7 of the fastening fitting 6 is removed and the wire 5 is loosened, so that the wire 5 escapes toward the inner circumferential groove 4 side by its elasticity. As a result, the insertion port 3 can be easily pulled out.

FIG. 4 shows a case where the present invention is implemented in a double supply and exhaust pipe, and the configuration is exactly the same as the embodiment shown in FIGS. 2 and 3.

[Effects of this invention]

The present invention has an inner circumferential groove 4 on the socket 2 side as described above.
A peripheral groove 8 is formed on the side of the insertion port 3, into which the wire 5 is inserted.
This has the effect that the socket 2 and the insertion opening 3 can be easily fixed by pulling from the outside of the socket 2.

Furthermore, since the wire 5 engages with the inner circumferential groove 4 and the outer circumferential groove 8 over almost the entire circumference, the wire 5 is securely fixed.
The strength when tested with a diameter of 150 mm or more is:
It was almost the same as the one with a smaller caliber.

[Brief explanation of drawings]

Figure 1 is an explanatory cross-sectional view of a conventional supply and exhaust pipe fixing device, Figure 2 is a perspective view showing the main parts of a supply and exhaust pipe using the fixing device of the present invention, and Figure 3 is a fixed state of the supply and exhaust pipe. FIG. 4 is a partial vertical cross-sectional view showing the present invention implemented in a dual supply and exhaust pipe. 1... Supply/exhaust tube, 2... Receiving port, 3... Insertion port, 4... Inner circumferential groove, 5... Wire, 6... Tightening fitting, 7... Lever, 8... Outer circumferential groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A socket is formed at one end of the supply/exhaust pipe, and an insertion port with a diameter that can be inserted into another socket is formed on the opposite side of the socket, and the inside of the socket is An outer circumferential groove with a semicircular cross section is formed on the circumferential surface, and an outer circumferential groove with a semicircular cross section is formed on the outer circumferential surface of the insertion port, and a part of the inner circumferential groove formed in the socket is cut out to form a through hole. One end of a wire made of an elastic material and having a circular cross section that fits in the inner circumferential groove is exposed from the through hole and goes around the inner circumferential groove of the socket, and the other end is inserted into the through hole. The wire is engaged with a tightening fitting on the outside of the socket, and the wire is pulled by the lever of the tightening fitting to reduce its diameter, so that a part of the cross section of the wire is inside the outer circumferential groove. A fixing device for a joint in an air supply and exhaust pipe, characterized by: