JP2002104244A - Cowl top structure having washer function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cowl top structure having a washer function capable of reducing the number of parts, and simplifying assemblage work. SOLUTION: On a cowl top 1, a washer tank part 4 is integrally formed, and in the washer tank part 4, an installation port 9 for installation of a pump 11 is formed. The number of parts can therefore be reduced, and the assemblage work can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cowl top structure having a built-in washer function.

[0002]

2. Description of the Related Art Heretofore, a nozzle in which a hollow liquid guide passage is formed in a cowl top formed of resin along the vehicle width direction, and a washer liquid flowing in the liquid guide passage is mounted in the middle of the liquid guide passage. There is known a structure capable of spraying the front window panel (for example, see JP-A-9-175435).

[0003]

However, such a prior art has a structure in which only a liquid guide passage for transferring a washer liquid is formed in a cowl top, and a washer tank for storing the washer liquid. Also, a pump or the like that sends out the washer liquid has 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 guide passage are required, so that the number of parts is increased and an engine room for assembling them is required. Work is also troublesome.

The present invention has been made by paying attention to such conventional technology, and provides a cowl top structure with a built-in washer function that can reduce the number of parts and simplify the assembling work.

[0005]

According to the first aspect of the present invention,
A hollow container-shaped washer tank integrally formed with a resin cowl top, a mounting hole for mounting a pump formed on a wall of the washer tank, and an introduction hole provided on an inner surface of the mounting opening. A first liquid guide 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 in the upper surface of the cowl top communicating with the first liquid guide passage. A second liquid guide passage extending in a hollow direction, an opening formed from a predetermined position of the liquid guide passage to the surface of the upper surface, and a nozzle for ejecting a washer liquid attached to the opening. .

According to the first aspect of the present invention, the cowl top is integrally formed with a washer tank, and the washer tank is provided with a mounting port for mounting a pump, so that the number of parts is reduced. Yes, the assembly work can be simplified.

According to a second aspect of the present invention, the second liquid guide passage has a plurality of openings, and the opening farther from the first liquid guide passage has a larger opening area.

According to the second aspect of the present invention, since the area of the plurality of openings of the second liquid guide passage is larger as the opening is farther from the first liquid guide passage, the first and second liquid guide passages from the washer tank section are larger.
It is possible to compensate for the pressure loss due to the lengthening of the path of the second liquid guide passage or the amount of washer liquid ejected at a far-off opening which tends to be reduced by injecting the washer liquid at an opening near the foreground ( Depending on the size of the opening, it can be larger than the passenger side).

According to a third aspect of the present invention, the cross-sectional area of the second liquid guide passage is increased as the distance from the first liquid guide passage increases.

According to the third aspect of the present invention, the cross-sectional area of the second liquid passage reaching the opening at a far position is formed larger than the cross-sectional area of the first liquid passage. It is possible to compensate for the amount of the washer fluid ejected from the opening at a distant position, which tends to decrease (depending on the cross-sectional area of the first and second liquid guide passages, it may be larger than the passenger seat side).

According to a fourth aspect of the present invention, at least a part of the washer tank portion faces an engine room.

According to the fourth aspect of the present invention, since at least a part of the washer tank faces the engine room, the washer liquid is heated at the temperature in the engine room, and the dirt removing ability of the washer liquid is improved. I do. Also,
Since heat applied to the washer tank can be absorbed by the washer liquid in the washer tank, the resin-made washer tank is less likely to be affected by the heat of the engine room (softening due to heat, etc.).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. Cowl Top 1
This is a component provided at the lower end of a front window panel (not shown) of the automobile. The cowl top 1 is integrally injection-molded with resin, and has a long shape along the vehicle width direction. In FIG. 1, the direction indicated by arrow A is the driver's seat side (right side), and the direction indicated by arrow B is the passenger seat side (left side).

At the front end of the cowl top 1, a flange 2 as an "upper surface" is formed over substantially the entire width of the vehicle. On the passenger seat side of the cowl top 1, a washer tank portion 4 in the form of a hollow container, which 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 liquid W. This washer tank part 4
The front wall 6, the driver's seat side wall 7, and the bottom wall 8 face the engine room E and receive heat from the engine room E.

A bulge 6a is formed on the front wall 6 of the washer tank 4 on the front passenger seat side, and a bulge 6a protruding forward is formed in the lower corner of the driver's seat side of the bulge 6a. A cylindrical mounting port 9 protruding to the side is formed. Engaging recesses 10 are formed on the outer surface of the mounting opening 9 at opposing positions.

A pump 11 is attached to the attachment port 9. The pump 11 has a rotating impeller 12 at its tip and an engaging claw 13 at a position facing the side surface. By engaging the engaging claw 13 with the engaging concave portion 10 of the mounting port 9, the pump 11 is mounted on the mounting port 9. In the mounted state, the impeller 12 at the tip of the pump 11 is located in the mounting port 9 and rotates in the mounting port 9. Washer liquid W is provided between the mounting port 9 and the pump 11.
A packing (not shown) is provided for preventing leakage.

An introduction hole 14 is formed on the inner surface of the mounting opening 9 at a position corresponding to the thickness of the bulging portion 6a. And
Ascending from the introduction hole 14 along the side wall of the bulging portion 6a,
After reaching the flange 2, one continuous hollow first liquid guide passage 15 and second continuous liquid guide passage 16 extending along the flange 2 toward the driver's seat side are formed. The first liquid passage 15 and the second liquid passage 16 are formed by gas injection molding. That is, after injecting the molten resin into the mold cavity, a pressurized gas is injected in an uncured state to form a cavity in the molten resin inside the thickness.
And forming the liquid guide passage 15 and the second liquid guide passage 16. In this embodiment, the cowl top 1 is easy to manufacture because one continuous first liquid guide passage 15 and second liquid guide passage 16 that are not branched on the way are formed.

In the second liquid guide passage 16 in the flange 2, a position corresponding to the passenger seat and a position corresponding to the driver's seat have openings 17, 1, 1
8 is formed therein, and the nozzle 1 for jetting the washer liquid W
9 and 20 are attached. Washer tank part 4
Is formed on the passenger seat side of the cowl top 1,
The nozzle 19 on the passenger side is closer to the washer tank 4, and the nozzle 20 on the driver's side is closer to the washer tank 4.
Far from.

As shown in FIG. 5, the size S1 of the opening 18 on the driver's seat side is larger than the size S2 of the opening 17 on the passenger's seat side among the openings 17 and 18 for mounting the nozzles 19 and 20. Have been. Nozzle 1 on the passenger seat side
Second liquid guide passage 1 from nozzle 9 to nozzle 20 on the driver's seat side
6, the cross-sectional area D1 of the first liquid guide passage 15 extending from the introduction hole 14 of the mounting port 9 to the nozzle 19 on the passenger seat side.
It is formed larger than 2.

In the cowl top 1 of this embodiment, as described above, not only the first liquid guide passage 15 and the second liquid guide passage 16 but also the washer tank portion 4 are integrally formed. Since the mounting port 9 for mounting the pump 11 is also formed in the part 4, the number of parts can be reduced as compared with the related art, and the assembling work in the engine room E can be simplified.

The washer fluid W is injected into the washer tank 4 of the cowl top 1 having such a structure, and the pump 11 is turned on when necessary. Is pumped into the first liquid guide passage 15 from the introduction hole 14 by the impeller 12 of the pump 11. Since the position of the mounting port 9 is low, even if the amount of the washer liquid W remaining in the washer tank portion 4 becomes small, it can be reliably sent to the first liquid guide passage 15 and the second liquid guide passage 16. Further, the washer liquid W sent into the first liquid guide passage 15 and the second liquid guide passage 16 reaches the openings 17 and 18 on the passenger seat side and the driver's seat side, from which the respective nozzles 19 and In the state of being diffused by 20, it is sprayed to a front window panel (not shown).

The nozzle 20 on the driver's seat side and the nozzle 19 on the passenger's seat side are farther from the washer tank part 4 than the nozzle 20 on the driver's seat side. The amount of washer liquid W injected tends to be lower than that of the nozzle 19 on the passenger seat side due to the pressure loss due to the lengthening or the reason that the washer liquid W is injected by the nozzle 19 nearer to the front. In the embodiment, as described above, the size S1 of the opening 18 on the driver's seat side is increased, and the second liquid guide passage 16 on the driver's seat side is increased.
Is increased, it is possible to compensate for a decrease in the ejection amount of the nozzle 20 on the driver's seat side. Also,
Depending on the size S1 of the opening 18 and the setting of the cross-sectional area D1 of the second liquid guide passage 16, the injection amount of the washer liquid W from the nozzle 20 on the driver's seat side can be made larger than that on the passenger seat side.

Further, since the front wall 6, the side wall 7, and the bottom wall 8 of the washer tank 4 face the engine room E, the washer liquid W is heated at the temperature in the engine room E,
The dirt removal ability when the washer liquid W is sprayed on the front window panel is improved. On the contrary, since the heat applied to the washer tank 4 can be absorbed by the washer liquid W in the washer tank 4,
The resin-made washer tank 4 is less susceptible to the influence of heat of the engine room E (softening due to heat, etc.).

[0024]

According to the present invention, the cowl top is also integrally formed with the washer tank, and the washer tank is formed with the mounting opening for mounting the pump. 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 the washer tank taken along line SA-SA shown in FIG.

FIG. 3 is an exploded perspective view showing a mounting port of a washer tank and a pump.

FIG. 4 is a sectional view taken along line SB-SB shown in FIG. 3;

FIG. 5 is a cross-sectional view showing a liquid guide passage on a driver seat side and a passenger seat side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cowl top 2 Flange (upper surface part) 4 Washer tank part 9 Mounting port 11 Pump 15 First liquid guide path 16 Second liquid guide path 17, 18 Opening 19, 20 Nozzle A Driver's seat side B Passenger's seat side E Engine Room W Washer liquid S1, S2 Size of opening D1, D2 Cross-sectional area of liquid passage

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Yoshiyuki Tanabe Inventor Yoshiyuki Tanabe 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. F-term (reference) 3D003 AA04 AA11 AA18 BB01 CA07 DA01 3D025 AA02 AB01 AC02 AD02 AF04 AF08

Claims (4)

[Claims] 1. A hollow container-shaped washer tank formed integrally with a resin cowl top, a mounting hole for mounting a pump formed on a wall of the washer tank, and an inner surface of the mounting opening. A first liquid guide passage extending in a hollow shape from the introduced introduction hole toward the upper surface of the cowl top through the inside of the wall of the washer tank portion; A second liquid guide passage extending hollowly in the vehicle width direction in the upper surface, an opening formed from a predetermined position of the liquid guide passage to the surface of the upper surface, and a washer liquid jet attached to the opening A cowl top structure with a built-in washer function, characterized by comprising a nozzle for 2. The cowl top structure with a built-in washer function according to claim 1, wherein the second liquid guide passage has a plurality of the openings, and the opening closer to the side from the first liquid guide passage. A cowl top structure with a built-in washer function characterized by having a large opening area. 3. The cowl top structure with a built-in washer function according to claim 1, wherein a cross-sectional area of the second liquid guide passage is formed to be larger as the distance from the first liquid guide passage increases. A cowl top structure with a built-in washer function. 4. The cowl top structure with a built-in washer function according to claim 1, wherein at least a part of the washer tank portion faces an engine room. Cowl top structure with built-in washer function.