JPH0330276Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cap for a tank such as an automobile brake oil reserve tank or a wash tank.

Hitherto, this type of cap has been known to have one stage in which an annular seal projection for fitting and locking is provided on the same horizontal plane as the annular engagement projection on its outer periphery, and two or more stages. In the former case, when the cap is fitted into the tank, if the annular seal protrusion is incomplete, it will immediately fall off and the operator will notice.
However, as shown in Fig. 1, the latter seals even when the upper annular seal protrusion B is in contact with the rim of the tank C among the two annular seal protrusions B on the cap body A. Since the protrusion B is in contact with the inner surface of the mouth part, it may appear that it is completely closed at first glance, and there is a risk that it may come off due to vibrations, impact force, etc. during driving, causing an unexpected failure.

This idea was developed in view of the above-mentioned drawbacks of the conventional cap, and an annular engagement protrusion is formed inward on the lower surface of the outer periphery of the canopy part of the elastic cap body, and the seal cylinder extending in the canopy part has the above-mentioned shape. forming an annular sealing protrusion located below the annular engagement protrusion;
Furthermore, by providing a protrusion piece projecting downward on the lower edge of the annular interlocking protrusion, the purpose of the present invention is to obtain an inexpensive cap that can confirm the mating state of the cap and prevent unexpected accidents. It is something.

An embodiment of the configuration of this invention shown in the drawings will be described in detail below.

The cap body 1 is made of an elastic material such as rubber or polyurethane, and has a cylindrical seal tube 3 with a smaller diameter suspended from and extending from the lower surface of the canopy portion 2, and an annular engagement protrusion 4 is formed on the outer periphery of the lower surface of the canopy portion 2. At the same time, an annular seal protrusion 5 is formed on the corresponding seal cylinder 3, and an annular locking groove 6 is formed on the inner surface by both protrusions 4 and 5. In addition, a second
An annular sealing protrusion 7 is formed, and a protrusion piece 8 is provided on a part of the lower edge of the annular engagement protrusion 4 to protrude downward.

Note that 9 is the opening of the tank, and 10 is the lip at the tip of the opening 9, which has an annular bulge extending outward.

With this structure, when the cap body 1 is fitted into the opening 9 of the tank, the lower annular seal protrusion 7 on the opposite side to the side where the protrusion piece 8 is formed opens as shown in FIG. When it is inserted into the portion 9 and then pressed against the elasticity of the projection piece 8, the mouth rim 1 is removed at once.
0 pushes out the annular engagement protrusion 4 and the annular sealing protrusion 5 and is fitted into the locking recessed groove 6 to be locked therein, thereby making it possible to reliably seal the opening 9 with the cap as shown in FIG. However, when the lip 10 is in an incomplete state where it is not fitted into the locking groove 6 and locked, only the lower annular seal projection 7 surface on the side where the projection piece 8 is not formed fits into the opening 9. , the protruding piece 8 comes into contact with the upper surface of the lip 10, and the cap body 1 is in an inclined state (the state shown in FIG. 4), so that the operator can tell at a glance that the cap is incompletely tightened.

In the above embodiment, the annular seal protrusion is formed in two stages, but instead of this, a single stage in which the annular seal protrusion is located below the annular engagement protrusion can be applied.

As detailed above, this idea has a simple structure in which a protruding piece is suspended and extended from a conventional cap, but it is possible to reliably perform the cap closing operation visually, which is easily overlooked and misunderstood by the operator. Since the cap can be checked, the cause of failure can be prevented by preventing the cap from coming off due to external forces such as vibration, rocking, and impact while driving, and since the structure is simple, it can be manufactured at low cost. It has various effects such as being able to immediately cover the opening of a conventional tank.

[Brief explanation of the drawing]

Figure 1 is a diagram of the conventional cap when it is closed, Figure 2 is a longitudinal side view of this invention, Figure 3 is a back view,
FIG. 4 is a longitudinal cross-sectional view of the process of closing the lid, and FIG. 5 is a longitudinal cross-sectional view of the same after closing the lid. DESCRIPTION OF SYMBOLS 1... Cap main body, 4... Annular biting protrusion, 5... Annular sealing protrusion, 7... Annular sealing protrusion, 8... Protrusion piece.

Claims (1)

[Scope of utility model registration request] An annular engagement protrusion 4 is formed inwardly on the lower surface of the outer periphery of the canopy part 2 of the cap body 1 having elasticity, and a seal cylinder 3 is integrally extended with the canopy part 2 inward of the annular engagement protrusion 4. A tank cap comprising an annular seal projection 7 located below the annular engagement projection 4 and a projection piece 8 projecting downward from the lower edge of the annular engagement projection 4.