JPH04104763U - Cap for reservoir tank - Google Patents

Abstract

(57) [Summary] [Purpose] By arranging the communication hole of the reservoir cap at the center of the cap and above the inside of the cylinder, and further configuring a maze-like ventilation path between the outside and the inside of the tank. ,
To prevent liquid from leaking to the outside even when a tank is tilted. [Structure] The cap 14 is composed of a cap body 16 and an inner cap 17. A hollow cylindrical body 31 is provided upright in the center of the bottom 22 of the inner cap 17, and a communication hole is provided above the hollow cylindrical body 31.
A closing plate portion 33 having a diameter of 34 is provided. Furthermore, the cap body 16
The outer circumferential wall 19 of the inner cap 17 and the outer circumferential wall 23 of the inner cap 17 are made to face each other to form a maze-like ventilation path 28 communicating with the outside. This prevents liquid from leaking to the outside even if the tank is tilted, and also prevents foreign matter from entering from the outside.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention applies to radiator fluid, power steering oil, clutch fluid or brake fluid. The present invention relates to a cap used for a reservoir tank that accommodates liquid liquid, etc.

0002

[Conventional technology]

Conventionally, this type of cap is generally shown in Figure 2 taken from Utility Model Publication No. 12927/1983. As shown in the figure, it consists of a cap body 2 and an inner cap 3, and the cap body 2 The space 4 defined by the cap body 2 and the inner cap 3 is communicated with the outside. A ventilation hole 5 is provided in the center of the inner cap 3 to vent the inside of the tank 7 and the space. A communication hole 6 communicating with 4 is provided.

0003 In this cap 1, the communication hole 6 is located near the liquid level, so the tank When the liquid in the space 7 is agitated, the liquid easily enters the space 4 through the communication hole 6. Furthermore, there is a problem of leakage to the outside through the ventilation hole 5 provided in the cap body 2. was occurring.

0004 In order to solve such problems, for example, Japanese Utility Model Publication No. 50-23732 has a system as shown in Figure 3. uni, the communication hole 6 of the inner cap 3 is connected to the center part A and the outer peripheral part B of the inner cap 3. and between the communicating hole 6 and the central part A and the outer peripheral part B, respectively. Protruding downward shielding plates 8, 9 are provided to prevent the liquid in the tank 7 from leaking into the space 4 from the communication hole 6. trying to prevent it from happening.

[0005]

[Problem that the idea aims to solve]

However, according to the cap structure shown in the above-mentioned Japanese Utility Model Publication No. 50-23732, The reservoir tank is tilted because the vent is still located close to the liquid level in the tank. It has been difficult to completely prevent liquid from leaking from the communication hole due to the slope. Also, Since the ventilation hole 5 is provided on the top surface of the cap body 2, foreign objects from the outside can be prevented from entering the ventilation hole. 5 easily enters the space 4, and further mixes into the liquid in the tank 7 through the communication hole 6. There was also a problem. The purpose of this invention is to solve the above problems and prevent the reservoir tank from tilting or rocking. The liquid in the tank will not leak even if It is an object of the present invention to provide a cap for a reservoir tank that prevents foreign matter from entering.

[0006]

[Means to solve the problem]

In order to achieve the above object, the configuration of the present invention is as follows. i.e. cap book A reservoir button consisting of a body and an inner cap provided inside the cap body. In the cap for the inner cap, a hollow cylindrical part is provided upright in the center of the inner cap, and A closing plate portion having a communication hole is provided in the upper part of the inside of the hollow cylinder body, and the outside of the cap body is provided with a closing plate portion having a communication hole. The circumferential wall and the outer circumferential wall of the inner cap are made to face each other, and the key is attached to this opposing portion. a labyrinth that communicates the space formed between the cap body and the inner cap to the outside; The structure is characterized by the provision of a ventilation passage.

[0007]

[Effect]

This configuration prevents the reservoir tank from tilting or swinging considerably. Even if the liquid is agitated, the communication hole is a hollow hole located in the center of the inner cap. It is formed in the closing plate provided at the top of the cylinder, so the liquid can be kept inside the inner cap. It is suppressed at the bottom or the lower part of the hollow cylinder, and the possibility of reaching the top of the cylinder is extremely small. There is almost no leakage from the communication hole in the blockage plate. In the unlikely event that liquid leaks into the communication hole Even if leakage occurs from the cap body, do not provide a ventilation hole at the bottom of the cap body. The outer circumferential wall of the inner cap and the outer circumferential wall of the inner cap are made to face each other, and the cap is attached to this opposing portion. Labyrinth ventilation that communicates the space formed between the main body and the inner cap to the outside. A channel is provided to prevent leakage to the outside. Also, for the same reason, external It is possible to prevent foreign matter from entering the tank.

[0008]

【Example】

Hereinafter, one embodiment of the present invention will be described based on FIG. 1.

[0009] In FIG. 1, 11 is a reservoir tank body containing liquid W, and its upper part is An opening 12 is formed in. A cylindrical portion 13 is erected in this opening 12. The upper end portion is a fitting portion 15 with an enlarged diameter for connecting the cap 14. Cat The cap 14 is roughly composed of a cap body 16 and an inner cap 17 welded to the lower side of the cap body 16. has been done. The cap body 16 has an outer wall 19 and an inner wall 20 that hang concentrically from the bottom 18. In addition, a short intermediate wall 21 is provided between the outer circumferential wall 19 and the inner circumferential wall 20.

0010 The inner cap 17 is fitted into the cylindrical part 13 of the reservoir tank body 11 with the bottom part 22 facing downward. It is worn. In the middle part of the outer circumferential wall 23 of the inner cap 17, there is a radially extending flange. A flange portion 24 is provided, and the flange portion 24 is provided with A plurality of engaging pieces 25 are provided that engage with the fitting portion 15 of the reservoir tank main body 11. Ru. Furthermore, the outer peripheral wall 23 of this inner cap 17 has an inner/outer double cylinder structure, and the outer peripheral wall 23 has an inner/outer double cylinder structure. The tip of the portion 23a is fitted into the bottom of the cap body 16, while the inner cylindrical portion 23b is fitted with a key. A slight gap 26 is formed between the cap body 16 and the cap body 16. In addition, the tip of the outer cylinder portion 23a A ventilation hole 27 is provided in the outer cylinder portion 23a to communicate between the inside and outside of the outer cylinder portion 23a. In this way, the key Space S formed by cap body 16 and inner cap 17 and reservoir tank book The body 11 is communicated with the outside through a ventilation passage 28 having a so-called labyrinth structure.

[0011] A hollow cylindrical body part 31 is erected in the center of the bottom part 22 of the inner cap 17. A slight gap 32 is provided between the upper end of 31 and the bottom 18 of the cap body 16. . The upper part of the hollow cylindrical body 31, that is, closer to the bottom 18 of the cap body 16 than the liquid level. A conical occluding plate part 33 with the apex downward is attached to the contact position, and the occluding plate part 33 is A communication hole 34 communicating the space S and the inside T of the tank is bored at the apex. In addition, occlusion The reason why the plate part 33 has a conical shape with the apex downward is to prevent liquid from passing through the communication hole 34. Even if the liquid reaches the upper part of the hollow cylindrical body part 31, it will quickly return to the inside of the tank. This is to make it easier to return.

0012 Next, the operation of this embodiment configured as described above will be explained.

[0013] If the reservoir tank tilts or shakes for some reason, the inside of the tank may The liquid W is also shaken, and as a result, most of the liquid W is on the top surface of the tank 11 and the inner cap. It may hit the bottom 22 of 17 and the lower end of the hollow cylindrical body 31 and fall into the tank. , some of them may try to pass through the communication hole 34. However, the communication hole 34 is Inside the hollow cylindrical body 31 provided in the center of the tank 11 and away from the normal liquid level. Because it is provided close to the bottom 18 of the cap body 16, the tank is tilted considerably. Even if the liquid reaches the communication hole 34 of the blocking plate part 33, the possibility of the liquid reaching the communication hole 34 is extremely small. Leakage from the hole 34 can be prevented. Also, in the unlikely event that liquid passes through the communication hole 34, It then passes through the gap 32 between the bottom 18 of the cap body 16 and the upper end of the hollow cylindrical body 31. Even if there is leakage into the space S, the ventilation hole 27 is located at the bottom 18 of the cap body 16 as in the conventional case. It is not provided, but is provided within the maze-like ventilation path 28 to prevent liquid from leaking to the outside. can be prevented from occurring. Also, for the same reason, foreign matter may enter the tank from outside. can prevent the intrusion of

[0014] In addition, in this embodiment, the engagement part that engages with the fitting part 15 of the reservoir tank body 11 is The piece 25 is provided on the flange portion 24 of the inner cap 17, but this is attached to the cap body. The outer circumferential wall 19 of 16 is extended downward, and a plurality of engagement pieces 25 are integrally provided thereto, and the outer circumference Even if ventilation holes are drilled at appropriate positions on the wall and the labyrinth-shaped ventilation path 28 is communicated with the outside of the tank, good.

[0015]

[Effect of the idea]

As is clear from the above explanation, the reservoir tank cap of the present invention is adopted. This may cause the reservoir tank to tilt or oscillate, causing the liquid in the tank to oscillate. Even if the liquid in the tank is leaked to the outside, it can be prevented and It is possible to prevent foreign matter from entering the tank.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a reservoir tank cap according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a first conventional example.

FIG. 3 is a sectional view showing a second conventional example.

[Explanation of symbols] 14 cap 16 Cap body 17 Inner cap 22 Bottom 19 Outer wall of cap body 20 Inner wall of cap body 21 Intermediate wall 23 Outer wall of inner cap 23a Outer cylinder part 23b Inner cylinder part 27 Vent 28 Ventilation passage 31 Hollow cylindrical body part 33 Closure plate part 34 Communication hole S space

Claims (1)

[Scope of utility model registration request] 1. A reservoir tank cap consisting of a cap body and an inner cap provided inside the cap body, wherein a hollow cylindrical body part is provided upright in the center of the inner cap, and the hollow cylindrical body part A closing plate portion having a communication hole is provided in the upper part of the cylinder, and an outer circumferential wall of the cap body and an outer circumferential wall of the inner cap are opposed to each other, and a closing plate portion is formed between the cap body and the inner cap at this opposing portion. A cap for a reservoir tank characterized by having a labyrinth-like ventilation path that communicates a space with the outside.