JP3911985B2 - Cowl top structure with built-in washer function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cowl top structure with a built-in washer function.
[0002]
[Prior art]
Conventionally, a hollow liquid introduction passage along the vehicle width direction is formed in a cowl top formed of resin, and a washer liquid flowing in the liquid introduction passage is transferred to the front window panel from a nozzle attached in the middle of the liquid introduction passage. A structure that enables injection is known (see, for example, JP-A-9-175435).
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, the liquid introduction passage for transferring the washer liquid is simply formed in the cowl top, and the washer tank for storing the washer liquid and the pump for sending the washer liquid are used. Etc. have a separate structure. Therefore, a mechanism for supporting the washer tank and the pump and a piping hose for connecting the washer tank and the liquid introduction passage are required, so that the number of parts increases and the engine room for assembling them is installed. The work in is also troublesome.
[0004]
The present invention has been made paying attention to such a conventional technique, and provides a cowl top structure with a built-in washer function capable of reducing the number of parts and simplifying assembly work.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a hollow container-shaped washer tank unit formed integrally with a resin cowl top, a pump mounting port formed on a wall of the washer tank unit, A first liquid introduction passage extending in a hollow shape from the introduction hole provided in the inner surface to the upper surface of the cowl top through the inside of the wall of the washer tank, and communicated with the first liquid introduction passage; A second liquid introduction passage extending in a vehicle width direction hollow shape in the upper surface portion of the cowl top, an opening formed from a predetermined position of the liquid introduction passage to the surface of the upper surface portion, and a washer attached to the opening The second liquid introduction passage has a plurality of the openings, and the opening farther from the first liquid introduction passage has a larger opening area, and the second introduction passage is provided. The cross-sectional area of the liquid passage is from the first liquid introduction passage. It is formed larger as Zakaru.
[0006]
According to the first aspect of the present invention, the washer tank portion is integrally formed on the cowl top, and the washer tank portion is formed with the mounting port for mounting the pump. Attaching work can be simplified.
Further, since the area of the plurality of openings of the second liquid introduction passage is larger as the opening farther from the first liquid introduction passage, the path of the first and second liquid introduction passages from the washer tank portion becomes longer. It can compensate for the pressure loss or the amount of washer fluid jetted at the far opening, which tends to decrease due to the washer fluid being ejected at the near opening. (Depending on the size of the opening, the amount is larger than that on the passenger seat side. Can also).
Furthermore, since the cross-sectional area of the second liquid introduction passage leading to the opening at the far position is formed larger than the cross-sectional area of the first liquid introduction passage, the washer liquid at the opening at the far position that tends to decrease due to the same reason as described above. Can be supplemented (depending on the cross-sectional area of the first and second liquid introduction passages, it can be made larger than that on the passenger seat side).
[0011]
According to a second aspect of the present invention, at least a part of the washer tank portion faces the engine room.
[0012]
According to the second aspect of the present invention, since at least a part of the washer tank part faces the engine room, the washer liquid is warmed at the temperature in the engine room, and the dirt removing ability of the washer liquid is improved. In addition, since the heat applied to the washer tank portion can be absorbed by the washer liquid in the washer tank portion, the resin washer tank portion is not easily affected by the heat of the engine room (such as softening due to heat).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to FIGS. The cowl top 1 is a component provided at the lower end of a front window panel (not shown) of the automobile. The cowl top 1 is integrally molded with resin and has a long shape along the vehicle width direction. In FIG. 1, the arrow A direction is the driver's seat side (right side), and the arrow B is the passenger seat side (left side).
[0014]
At the front end of the cowl top 1, a flange 2 as an “upper surface portion” is formed over substantially the entire vehicle width direction. Further, on the passenger seat side of the cowl top 1, a washer tank portion 4 having a hollow container shape that is substantially sealed by welding a lid 3 from above is integrally formed. The lid 3 is provided with a cap 5 for injecting the washer fluid W. The washer tank portion 4 has a horizontally long box shape, and its front wall 6, side wall 7 on the driver's seat side, and bottom wall 8 face the engine room E, and heat from the engine room E is absorbed. receive.
[0015]
The front wall 6 of the washer tank portion 4 has a bulging portion 6a projecting to the front side on the front passenger seat side, and projecting toward the engine room E at the lower corner of the driver seat side of the bulging portion 6a. A cylindrical attachment port 9 is formed. Engagement recesses 10 are formed on the outer surface of the attachment port 9 at opposing positions.
[0016]
A pump 11 is attached to the attachment port 9. The pump 11 has an impeller 12 that rotates at the tip, and an engaging claw portion 13 at a position opposite to the side surface. By engaging the engaging claw 13 with the engaging recess 10 of the attachment port 9, the pump 11 is attached to the attachment port 9. In the attached state, the impeller 12 at the tip of the pump 11 is located in the attachment port 9 and rotates in the attachment port 9. Between the attachment port 9 and the pump 11, a packing (not shown) for preventing the washer fluid W from leaking is provided.
[0017]
An introduction hole 14 is formed in the inner surface of the attachment port 9 at a position corresponding to the thickness of the bulging portion 6a. Then, a single continuous hollow first liquid guide that rises from the introduction hole 14 along the side wall of the bulging portion 6a, reaches the flange 2, and extends to the driver seat side as it is along the flange 2. A passage 15 and a second liquid introduction passage 16 are formed. The first liquid introduction passage 15 and the second liquid introduction passage 16 are formed by gas injection injection molding. That is, after injecting the molten resin into the mold cavity, a pressurized gas is injected in an uncured state, and the first liquid introduction passage 15 and the second liquid introduction which become a cavity in the molten resin inside the wall thickness The passage 16 is formed while being formed. In this embodiment, since the one continuous 1st liquid introduction path 15 and the 2nd liquid introduction path 16 which do not branch on the way were formed, manufacture of the cowl top 1 is easy.
[0018]
In the second liquid introduction passage 16 in the flange 2, openings 17 and 18 reaching the surface of the flange 2 are formed at a position corresponding to the passenger seat and a position corresponding to the driver's seat. Nozzles 19 and 20 for ejection are attached. Since the washer tank portion 4 is formed on the passenger seat side of the cowl top 1, the nozzle 19 on the passenger seat side is closer to the washer tank portion 4, and the nozzle 20 on the driver seat side is closer to the washer tank portion 4. far.
[0019]
As shown in FIG. 5, among the openings 17 and 18 for mounting both nozzles 19 and 20, the size S1 of the opening 18 on the driver's seat side is formed larger than the size S2 of the opening 17 on the passenger seat side. . In addition, the cross-sectional area D1 of the second liquid introduction passage 16 extending from the nozzle 19 on the passenger seat side to the nozzle 20 on the driver seat side is the first from the introduction hole 14 of the attachment port 9 to the nozzle 19 on the passenger seat side. The cross-sectional area D2 of one liquid introduction passage 15 is formed larger.
[0020]
As described above, the cowl top 1 according to this embodiment includes not only the first liquid introduction passage 15 and the second liquid introduction passage 16 but also the washer tank portion 4 and is formed integrally with the washer tank portion 4. Since the mounting port 9 for mounting the pump 11 is also formed, the number of parts can be reduced compared to the conventional case, and the assembly work in the engine room E can be simplified.
[0021]
When the washer liquid W is injected into the washer tank portion 4 of the cowl top 1 having such a structure and the pump 11 is switched on when necessary, the washer liquid W in the mounting port 9 is discharged from the pump 11. The impeller 12 is pumped from the introduction hole 14 into the first liquid introduction passage 15. Since the position of the attachment port 9 is low, even if the remaining amount of the washer liquid W in the washer tank portion 4 is reduced, it can be reliably delivered to the first liquid introduction path 15 and the second liquid introduction path 16. Further, the washer liquid W delivered into the first liquid introduction passage 15 and the second liquid introduction passage 16 reaches the openings 17 and 18 on the passenger seat side and the driver seat side, from which the respective nozzles 19, 20 is sprayed on a front window panel (not shown) in a state of being diffused by 20.
[0022]
Of the nozzle 20 on the driver's seat and the nozzle 19 on the passenger's seat, the nozzle 20 on the driver's seat is farther from the washer tank section 4, so that the path from the washer tank section 4 is originally longer. The amount of washer fluid W sprayed tends to be lower than that of the nozzle 19 on the passenger seat side due to the pressure loss due to or the fact that the washer fluid W is ejected by the nozzle 19 near the front. As described above, since the size S1 of the opening 18 on the driver's seat side is increased and the cross-sectional area D2 of the second liquid introduction passage 16 on the driver's seat side is increased, the ejection from the nozzle 20 on the driver's seat side Can compensate for the decline in volume. Further, depending on the setting of the size S1 of the opening 18 and the cross-sectional area D1 of the second liquid introduction passage 16, the amount of washer fluid W injected from the nozzle 20 on the driver's seat side can be made larger than that on the passenger seat side. .
[0023]
Further, since the front wall 6, the side wall 7 and the bottom wall 8 of the washer tank section 4 face the engine room E, the washer liquid W is warmed at the temperature in the engine room E, and the washer liquid W is heated to the front window panel. The ability to remove dirt when sprayed is improved. Conversely, since the heat applied to the washer tank unit 4 can be absorbed by the washer liquid W in the washer tank unit 4, the resin washer tank unit 4 is influenced by the heat of the engine room E (such as softening by heat). ).
[0024]
【The invention's effect】
According to the present invention, the washer tank portion is also formed integrally with the cowl top, and the washer tank portion is also provided with a mounting port for mounting the pump, so the number of parts can be reduced and the assembling work can be simplified. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cowl top according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a washer tank section taken along the line SA-SA shown in FIG.
FIG. 3 is an exploded perspective view showing a mounting port of a washer tank unit and a pump.
4 is a cross-sectional view taken along line SB-SB in FIG.
FIG. 5 is a cross-sectional view showing a liquid introduction passage on a driver seat side and a passenger seat side.
[Explanation of symbols]
1 cowl top 2 flange (upper surface)
4 Washer tank portion 9 Mounting port 11 Pump 15 First liquid introduction passage 16 Second liquid introduction passages 17 and 18 Openings 19 and 20 Nozzle A Driver side B Passenger side E Engine room W Washer liquids S1 and S2 Size D1, D2 Cross-sectional area of liquid guide passage

Claims (2)

A hollow container-shaped washer tank unit formed integrally with a resin cowl top, a pump mounting mounting port formed on the wall of the washer tank unit, and an introduction hole provided in the inner surface of the mounting port A first liquid introduction passage extending in a hollow shape toward the upper surface of the cowl top through the wall of the washer tank, and a vehicle width communicating with the first liquid introduction passage and within the upper surface of the cowl top. A second liquid introduction passage extending in a hollow shape in the direction, an opening formed from a predetermined position of the liquid introduction passage to the surface of the upper surface portion, and a nozzle for jetting washer liquid attached to the opening Become
The second liquid introduction passage has a plurality of the openings and an opening area that is larger as the opening is farther from the first liquid introduction passage.
The cowl top structure with a built-in washer function is characterized in that the cross-sectional area of the second liquid introduction passage is formed so as to become farther away from the first liquid introduction passage . A cowl top structure of the washer Built in claim 1 Symbol placement,
A cowl top structure with a built-in washer function, wherein at least a part of the washer tank part faces the engine room.

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