JPS643462Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an open end structure of a drain pipe.

A drain pipe is used in an air cleaner 1, for example, as shown in FIG. This drain pipe 2 is for discharging water droplets etc. removed by the air cleaner element to the outside, and its open end A forms a kind of check valve to actively discharge water droplets etc. to the outside. , the intrusion of air, etc. from the outside is prevented as much as possible.

A conventional open-end structure of such a drain pipe is shown in FIG. 2. Among these, the one shown in Fig. 2a has two parts 3 and 3.
a and 3b, and the upper edges of these parts meet each other. Therefore, if this is molded, it is difficult to form an appropriate slit 4 in the bottom portion 3. That is, in order to form the slit 4, the upper edges of the abutting parts of the outer frame molds 5a and 5b must be brought into precise contact with the core 6, and the tip of the slit 4 must be sufficiently heated ( If this is not achieved, the slit 4 will be closed or the gap will be too large, making it difficult to obtain a homogeneous product. In addition, the one shown in FIG. 2b has the bottom 7
is formed by two parts 7a and 7b, and the upper end edge of one part 7a and the lower end edge of the other part 7b are made to meet each other. This bottom is an outer frame type 9
a, 9b, the upper edge of one mold 9b and the core 1
A slit 8 is formed there by abutting the lower edge of the 0. Therefore, when this bottom part 7 is molded, a proper slit 8 can be stably obtained, but when in use, the portion 7a of the bottom part 7 is weak and the slit 8 may open too much. Furthermore, there was a risk that the slit 8 would become permanently open due to long-term use.

In view of these problems, the purpose of this invention is to
To provide an open-end structure of a drain pipe that always produces a homogeneous product and always maintains stable performance even after long-term use.

In order to achieve this purpose, the present invention makes the lower edge of one part and the upper edge of the other part constituting the bottom meet each other, and provides a tongue piece that also serves as a rib on the lower surface of the end of the other part. A uniform slit is always obtained by molding and molding, and deformation of the other bottom portion is prevented even during long-term use.

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 3 shows a plug 11 constituting the end of the drain pipe according to the present invention.
As shown in Fig. 3a, this stopper 11 is made by combining cylinders with different diameters so that the diameter decreases downward, and integrally molded with rubber or the like. An annular recess 12 is formed, and the bottom 13 is formed by bringing together the lower edge of one bottom portion 13a and the upper edge of the other bottom portion 13b constituting the bottom 13, as shown in FIG. 3b. A slit 14 is formed therein, and a tongue piece 15 is formed on the lower surface of the end of the bottom portion 13b. FIG. 4 shows a mold for forming the plug 11 of this drain pipe, and the mold consists of outer frame molds 16a, 16b and a core 1.
7, and by making the upper edge of the outer frame mold 16a meet the lower edge 17 of the core 17, a slit is formed in the center of the bottom of the stopper 11 over almost the entire diameter when molded. I have to. In this case, the tongue piece 15 is molded by the outer frame molds 16a and 16b.

The plug 11 formed in this way is connected to the open end of the drain pipe 2, and once the water droplets etc. accumulated in the air cleaner 1 are accumulated in the bottom part 13, and when the water droplets etc. have an appropriate weight, the plug 11 is connected to the open end of the drain pipe 2. is pushed open to discharge water droplets and the like to the outside through the slit 14. At that time, water droplets etc. are guided by the tongue piece 15,
fall downwards.

As mentioned above, in the drain pipe having the open end structure according to the present invention, even when water droplets etc. accumulate at the bottom, the lower part of the bottom part hardly deforms, and the upper part does not deform. Since the slit is opened by being pushed open, the amount of opening is small.
Therefore, a stable discharge action is ensured over a long period of time, and when the tongue piece is located at the front side of the vehicle, the tongue piece protects the slit from mud etc. and prevents the slit from being blocked. be able to.

[Brief explanation of the drawing]

Figure 1 shows the air cleaner and the drain pipe installed in the air cleaner, Figure 2 a and b
3 is a partial sectional view showing a conventional drain pipe open end structure, FIGS. The figure is a sectional view of a main part showing a mold for the stopper. 1...Air cleaner, 2...Drain pipe,
A...Open end, 11...Plug, 13...Bottom, 13
a... Upper part, 13b... Lower part, 14...
Slits, 15...tongue pieces.

Claims (1)

[Scope of utility model registration request] An open end of a drain pipe, the bottom of which is characterized in that the lower edge of the upper part and the upper edge of the lower part meet each other to form a slit there, and a tongue piece is formed on the lower surface of the end of the lower part. structure.