Hole plug

Abstract

To provide a hole plug capable of exhibiting drainage performance without being affected by adhesion of fixed components. [Solution] The hole plug 10 is provided with a first drain valve 11 that opens when a buoyancy greater than a predetermined adhesion force is generated, a second drain valve 12 that is provided at a position vertically higher than the first drain valve 11 and whose valve is stuck by a stuck component, and a stuck component dissolving agent 13 that can be dissolved by liquid on the inside of the second drain valve 12.

Description

[Technical Field]

[0001] The present invention relates to a hole plug. [Background technology]

[0002] Many HEV (Hybrid Electric Vehicle) batteries are installed in the gap between the floor and the seats, and the floor is often dug out to ensure cabin space. If water accidentally enters this area, there is a risk of the battery being submerged. To prevent this, a drainage grommet with a hole plug is installed in the floor. Patent Document 1 describes a hole plug that, when submerged, moves a float part upward due to buoyancy, helping to open the valve, thereby resolving any stuck valve.

[0003] This drain grommet has a valve that opens when water pressure is applied, but if a liquid with a high sugar content, such as orange juice, gets on it, the valve will stick. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-123439 Summary of the Invention [Problem to be solved by the invention]

[0005] The hole plug described in Patent Document 1 requires time for the water depth to reach a point where the buoyancy exceeds the adhesive force, which causes the problem that other non-waterproof equipment on the floor panel becomes submerged before the buoyancy is strong enough to release the adhesive force. [Means for solving the problem]

[0006] In one embodiment, the hole plug has drain valves at the high and low portions, and a dissolving agent for the adhered components is provided upstream of the valve at the high portion. [Effects of the Invention]

[0007] The hole plug of the present disclosure can exhibit drainage performance without being affected by the adhesion of solidified components. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing an example of a hole plug according to a first embodiment. [Figure 2] 4 is a flowchart showing an example of the operation of the hole plug according to the first embodiment. [Figure 3] FIG. 2 is a cross-sectional view showing an example of a hole plugging operation according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In FIG. 1, a hole plug 10 includes a first drain valve 11, a second drain valve 12, a dissolving agent for fixed components 13, a filter 14, a drain pocket 15, and a housing 16.

[0010] The first drain valve 11 is provided inside the housing 16. The first drain valve 11 closes when there is no pressure difference between the inside and outside of the housing 16, and opens when there is a pressure difference between the inside and outside. The first drain valve 11 may become stuck due to adhesions or the like, but opens when buoyancy greater than a predetermined sticking force occurs, and the valve opens when water inside the vehicle is to be drained outside the vehicle.

[0011] The second drain valve 12 is provided inside the housing 16 at a position higher in the vertical direction than the first drain valve 11. The second drain valve 12 closes when there is no pressure difference between the inside and outside of the housing 16, and opens when there is a pressure difference between the inside and outside.

[0012] The agent for dissolving stuck components 13 dissolves the stuck components in the second drain valve 12. For example, if the stuck components are sugars, the agent for dissolving stuck components 13 is preferably a sugar remover. The agent for dissolving stuck components 13 is provided near the second drain valve 12. For example, the agent for dissolving stuck components 13 is provided inside the housing 16, on the vehicle inner side of the second drain valve 12. When water flows into the housing 16, the agent for dissolving stuck components 13 dissolves and reaches the second drain valve 12. As a result, the stuck components that have stuck to the second drain valve 12 dissolve, allowing the second drain valve 12 to open. The second drain valve 12 then opens due to the pressure difference.

[0013] The filter 14 removes foreign matter from the flowing water. The drainage pocket 15 forms a space in which the inflowing liquid can be collected. The housing 16 is attached to an opening for draining water from inside the vehicle to the outside.

[0014] Next, the operation of the hole plug 10 will be described. Fig. 2 is a flowchart showing an example of the operation of the hole plug according to the first embodiment. Fig. 3 is a cross-sectional view showing an example of the operating state of the hole plug according to the first embodiment. The flowchart in Fig. 2 shows the operation when the first drain valve 11 and the second drain valve 12 become stuck due to adhesions or the like and the vehicle becomes submerged in water.

[0015] First, in step S21, as shown in Fig. 3(a), a situation occurs in which the liquid 31 with a high sugar content adheres and dries, causing the first drain valve 11 to stick, and then the process proceeds to step S22.

[0016] Then, in step S22, liquid flows into the vehicle interior, and the process proceeds to step S23.

[0017] Next, in step S23, the drain grommet equipped with the hole plug 10 is flooded. As shown in Figure 3(b), liquid 32 flows into the drain pocket 15, but because the second drain valve 12 remains stuck and closed, the water level rises to the area of ​​the agent for dissolving stuck components 13. Then, the process proceeds to step S24.

[0018] Next, in step S24, as shown in Fig. 3(c), the agent 13 for dissolving the fixed components reacts with water and dissolves (33), and the process proceeds to step S25.

[0019] Next, in step S25, as shown in Fig. 3(c), the dissolved solid component dissolving agent 13 dissolves the solid components adhering to the second drain valve 12, and the second drain valve for the secondary drain path opens. Then, the process proceeds to step S26.

[0020] Next, in step S26, as shown in Fig. 3(d), the dissolved agent 13 for dissolving fixed components reaches the first drain valve 11. Removal of the fixed components 31 begins. Then, the process proceeds to step S27.

[0021] Next, in step S27, as shown in FIG. 3(d), the adhered components 31 adhering to the first drain valve 11 are dissolved, and the first drain valve opens.

[0022] The above operation makes it possible to drain water when flooded.

[0023] Thus, with the hole plug of embodiment 1, if the lower drain valve becomes stuck due to stuck components, when the liquid reaches the upper drain valve, the agent for dissolving the stuck components dissolves, and the stuck lower drain valve is released, so that the drainage capacity can be exerted regardless of the adhesion of stuck components.

[0024] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, three or more drain valves may be provided. [Explanation of symbols]

[0025] 10 hole plug 11 First drain valve 12 Second drain valve 13. Dissolving agent for adhered components 14 Filters 15 Drainage pocket 16 Housing

Claims

[Claim 1] a first drain valve that opens when a buoyancy force greater than a predetermined fastening force is generated; a second drain valve provided at a position vertically higher than the first drain valve and having a valve stuck due to a sticking component; A hole plug provided on the vehicle interior side of the second drain valve with a dissolving agent for solidified components that can be dissolved by a liquid.

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