JPH061977U - Hose connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] When the hose 5 is externally fitted and connected to the circular pipe 2,
Prevents the hose 5 from rotating about its axis. [Structure] A projection 4 extending along the axial direction is provided on the outer surface on the side opposite to the tip end of the flange 3 of the circular tube 2, and a second groove 9 into which the projection 4 is fitted is provided on the inner surface of a hose 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hose connection structure for discharging drainage or the like that has condensed in a cooling unit of a vehicle air conditioner.

[0002]

[Prior art]

 An example of this type of conventional connection structure is shown in FIGS. 3 (A), 3 (B) and 3 (C). Drain that has condensed in the cooling unit 1 of the vehicle air conditioner is discharged through the drain hose 5 connected to the drain discharge pipe 2 formed of a circular pipe.

A flange 3 is provided on the circumference of the outer surface of the end of the drain extraction pipe 2, and a groove 7 is provided on the circumference of the inner surface of the end of a drain hose 5 made of an elastic material such as synthetic resin. The drain hose 5 is fitted onto the drain extraction pipe 2 and the collar 3 is fitted in the concave groove 7 to prevent the drain hose 2 from falling off. Reference numeral 6 denotes an expanded portion formed at the tip of the drain hose 5.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional connection structure, the drain hose 5 connected to the drain extraction pipe 2 easily rotates around its axis, so that the piping direction of the drain hose 5 is not stable.

Further, when the drain hose 5 is externally fitted to the drain extraction pipe 2, the inner diameter of the drain hose 5 on the tip side of the concave groove 7 has to be expanded while being expanded larger than the outer diameter of the collar 3. Therefore, there is a problem that it is difficult to connect the drain hose 5.

[0006]

[Means for Solving the Problems]

 The present invention has been proposed in order to solve the above problems. The gist of the first invention is that a hose made of an elastic material is externally fitted to a circular pipe and the inner surface of the end of the hose is In a connection structure of a hose that is connected by fitting a flange projecting on the outer surface of the end of the circular tube into a groove provided on the circumference, the outer surface of the circular tube on the opposite end side from the flange The hose connection structure is characterized in that a projection extending along the axial direction is provided on the inner surface of the hose, and a second concave groove into which the projection is fitted is provided on the inner surface of the hose.

The gist of the second invention is that a hose made of an elastic material is externally fitted to a circular pipe, and the end of the circular pipe is inserted into a groove provided on the circumference of the inner surface of the end of the hose. In a hose connection structure for connecting by fitting a flange protruding on the outer surface of the part, a hose connection structure characterized in that a fold portion extending axially from the groove of the hose to the tip side is provided. It is in.

[0008]

[Action]

 In the first invention, when the hose is externally fitted to the circular pipe, the flange is fitted in the groove and the projection is fitted in the second groove to prevent the hose from rotating about its axis.

In the second invention, when the hose is externally fitted to the circular pipe, the fold portion is expanded by the collar, and the inner diameter of the hose from the concave groove to the tip side increases.

[0010]

【Example】

 A first embodiment of the present invention is shown in FIG. 1, where (A) is a sectional view and (B) is a sectional view taken along line BB of (A). A protrusion 4 is provided on the outer surface of the drain discharge pipe 2 so as to extend axially from the collar 3 to the opposite end side. A second concave groove 9 into which the protrusion 4 is fitted is provided on the inner surface of the drain hose 5 from the concave groove 7 to the tip side. Other configurations are similar to those of the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

Then, when the drain hose 5 is connected to the drain extraction pipe 2, the collar 3 is fitted in the concave groove 7 to prevent the drain hose 5 from falling off, and the projection 4 is formed into the second concave groove. The drain hose 5 is fitted inside to prevent the drain hose 5 from rotating around its axis.

A second embodiment of the present invention is shown in FIG. 2, where (A) is an exploded perspective view and (B) is a sectional view taken along line BB of (A). Plural (three in the figure) folds 8 extending in the axial direction from the groove 7 of the drain hose 5 toward the tip side are provided at an angle of 120 ° from each other. Other configurations are similar to those of the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

Then, when the drain hose 5 is fitted onto the drain extraction pipe 2, the fold portion 8 is pressed against the collar 3 and is expanded as shown by the broken line in (B), and the concave portion of the drain hose 5 is depressed. Since the inner diameter of the tip end side of the groove 7 is larger than the diameter of the collar 3, the drain hose 5 can be easily connected.

[0014]

[Effect of device]

 In the first invention, when the hose is connected to the circular pipe, the protrusion can be fitted into the second concave groove to prevent the hose from rotating around the axis, so that the hose piping direction is kept constant. Can be regulated. In the second invention, when the hose is fitted onto the circular pipe, the fold portion is expanded by the brim and the inner diameter on the tip side from the groove of the hose is larger than the outer diameter of the brim, so that the hose is easy to use. It becomes possible to connect to a circular pipe.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (A) is a longitudinal sectional view, and (B) is a sectional view taken along the line BB of (A).

FIG. 2 shows a second embodiment of the present invention, (A) is an exploded perspective view, and (B) is a sectional view taken along the line BB of (A).

FIG. 3 shows an example of a conventional connection structure, (A) is an exploded perspective view, (B) is a vertical sectional view, and (C) is a sectional view taken along line CC of (B).

[Explanation of symbols]

 2 circular pipe 3 collar 5 hose 7 concave groove 4 protrusion 9 second concave groove

Claims (2)

[Scope of utility model registration request] 1. A hose made of an elastic material is externally fitted to a circular pipe,
In the connection structure of the hose which is connected by fitting the collar projecting on the outer surface of the end portion of the circular pipe in the groove provided on the circumference of the inner surface of the end portion of the hose, A hose connection structure characterized in that a projection extending along the axial direction is provided on the outer surface on the side opposite to the tip end, and a second concave groove into which the projection is fitted is provided on the inner surface of the hose. 2. A hose made of an elastic material is externally fitted to a circular pipe,
In the connection structure of the hose, which is connected by fitting a collar projecting on the outer surface of the end portion of the circular pipe into a groove formed on the circumference of the inner surface of the end portion of the hose, the tip of the groove of the hose A hose connection structure characterized in that a fold portion extending along the axial direction is provided on the side.