JPS6339130Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a ventilation system for a vehicle, and more specifically, a ventilation system that prevents backflow of air during driving and prevents dirt and dust from entering the passenger compartment from outside the vehicle. This relates to improvements in equipment.

In general, ventilation systems for vehicles such as trucks include:
It is attached to the body side of the driver's seat, and when the vehicle is running, it takes in air from outside the vehicle and exhausts the air inside the vehicle to the outside via a ventilation system, purifying the air inside the vehicle.

However, if the vehicle is driven with the windows slightly open, the interior of the vehicle will become under negative pressure, causing a backflow of air. Especially when driving on unpaved roads, dirt and dust from outside the vehicle will be sucked into the vehicle interior through the ventilation system. I had a problem with it.

In order to solve these problems, conventionally, a backflow prevention valve was provided at the opening of the ventilation system, as disclosed in Japanese Utility Model Application Publication No. 150937/1983 and Japanese Utility Model Application No. 71909/1983. is proposed.

However, in the case of the conventional ventilation system as described above, when installing the ventilation system, a large through hole must be formed in the outer panel of the body side so that the ventilation system can be installed. It is very difficult to secure enough space, and if large through holes are formed in the outer panel, there will be problems with the strength of the panel corners, so it is not always possible to install the ventilation device in the optimal location. Nakatsuta. In addition, the above-mentioned through-hole had a louvered panel (notch in the panel) attached to the surface of the ventilation system and was then inserted from the surface side of the outer panel, making assembly work difficult. There was a problem.

Furthermore, the ventilation holes formed in conventional ventilation systems,
A check valve is installed to open and close the ventilation hole, but since this check valve is made of a flexible material with one end attached, it may deform when exhausting air from the passenger compartment to the outside of the vehicle. Even if the air inside the cabin can be exhausted, as mentioned above, when the inside of the cabin becomes negative pressure, the backflow phenomenon will cause dust and dirt to come in from outside the car. There was a problem with dust being sucked into the cabin. Also,
As another conventional example, an automobile ventilation system has been proposed in Japanese Utility Model Application Publication No. 57-113215, but this automobile ventilation system has two one-way valves, one thick film and one thin film, which correspond to check valves. This conventional method uses the time lag difference between the two one-way valves to effectively prevent dust from entering the vehicle interior. When ventilating the vehicle, the thick-film one-way valve gets caught or gets caught in the finisher's notched protrusion, and is insufficient to prevent dirt and dust from entering the vehicle interior. .

Furthermore, in the case of this conventional example, there are many parts, the structure is complicated, and the strength is weak because a large opening is formed in the panel to attach the ventilation device, and the ventilation area is small. , there is a problem of poor ventilation efficiency.

This invention was devised by focusing on these conventional problems, and has a simple structure that effectively prevents dust from entering the vehicle interior. It is an object of the present invention to provide a ventilation system for a vehicle which has good ventilation efficiency and is prevented from getting caught in the notch protrusion of an air circulation hole during ventilation, and also has good assembly workability.

In order to achieve the above object, this invention includes a ventilation box equipped with a ventilation hole and a check valve for opening and closing the ventilation hole on the back side of the air circulation hole formed in the body side panel. A jamming prevention piece formed in the shape of a band made of a flexible material with a fixed upper end is provided between the back side of the air circulation hole and the check valve provided facing the air circulation hole. The gist is to prevent the check valve from getting caught in the notched protrusion of the air circulation hole during ventilation.

Embodiments of this invention will be described below based on the accompanying drawings.

FIG. 1 shows a front side view of a vehicle 2 such as a truck equipped with a ventilation system 1 according to the present invention. It is attached to the back side of the outer panel 5 that forms the opening 4.

The portion of the outer panel 5 to which the ventilation system 1 is mounted is louvered with a plurality of air circulation holes 6, and the back side thereof is shown in FIGS.
A ventilation box 7 drawn to have a concave cross section as shown in the figure is attached to a gasket 8 and a one-touch clip 9.
It is attached via.

A plurality of approximately pentagonal ventilation holes 10 (three in this embodiment) are formed at predetermined intervals on the bottom wall surface 7a of the ventilation box 7, and the back side of the ventilation holes 10, that is, the louvered Outer panel 5
Check valves 12 made of a flexible material such as rubber are provided on the back side of the bottom wall surface 7a facing the air circulation holes 6, respectively, so as to be openable and closable. It is detachably attached to the bottom wall surface 7a of the ventilation box 7 via a touch clip 13.

In addition, the gasket 8 interposed between the back side of the outer panel 5 and the flange portion 14 formed at the peripheral edge of the ventilation box 7 has a band-shaped gasket extending from the approximate center of the ventilation box 7 in the longitudinal direction. A jamming prevention piece 16 is integrally formed, and when air A is exhausted from the vehicle interior R toward the exterior X of the vehicle as shown in FIG. This prevents the deformed tip from getting caught in the cutout protrusion 6a of the air circulation hole 6 of the louvered outer panel 5.

Note that the biting prevention piece 16 may be formed separately from the packing 8 and attached.

The one-touch clip 9 is composed of a holder 9b having a hole in the center for inserting the pin 9a, and the cylindrical part of the holder 9b is divided into a plurality of parts and can be expanded and contracted, and the tip thereof has a widening shape. is formed.

Therefore, in this one-touch clip 9, the holder 9b is inserted through the mounting hole 17 formed in the outer panel 5 and the mounting hole 18 formed in the gasket 8 and the flange portion 14 of the ventilation box 7. The three parts can be fixed at the same time simply by inserting the pin 9a.

Also, the check valve 12 attached to the bottom wall surface 7a of the ventilation box 7 is connected to the same one-touch clip 1 as described above.
3.

Next, the assembly and operation of the embodiment constructed as described above will be described in detail.

First, the check valves 12 are attached via one-touch clips 13 to the back side of the bottom wall surface 7a of the ventilation box 7, in which the ventilation holes 10 are formed, so as to be openable and closable.

Then, the back side of the outer panel 5 is louvered through the gasket 8 attached to the flange portion 14 of the ventilation box 7 via an adhesive or the like and the anti-biting piece 16 formed integrally therewith. Attach it to a predetermined position using the one-touch clip 9 as described above.

When the ventilation box 7 is installed in this manner, a jamming prevention piece 16 hangs between the check valve 12 and the notch protrusion 6a of the air circulation hole 6 of the outer panel 5, as shown in FIG. It is in a state of disrepair.

Next, to explain the function, first, during normal ventilation, the air A that has entered the vehicle interior R during driving is removed from the check valve 12 provided in the ventilation hole 10 of the ventilation box 7.
The air is pushed up as shown by the dashed line in FIG. 5 and flows out of the vehicle X through the air circulation holes 6 of the outer panel 5. In this case, even if the check valve 12 is deformed, its opening state is controlled by the weight of the jamming prevention piece 16, so the tip of the check valve 12 will not get caught in the notched protrusion 6a of the air circulation hole 6. Therefore, the air A that has entered the vehicle interior R can be smoothly discharged to the outside X of the vehicle.

Next, when the inside of the vehicle interior R becomes negative pressure while driving and the air A outside the vehicle X causes a backflow phenomenon, the jamming prevention piece 16 presses each check valve 12 and the ventilation hole 10 is completely blocked. Therefore, it is possible to effectively prevent dust and dirt mixed in the air A from outside the vehicle from entering into the vehicle interior R. As described above, in the embodiment of this invention, a check valve 12 is provided on the back side of each of the plurality of ventilation holes 10, and a jamming prevention piece 16 made of a piece of flexible band-like material is provided on the back side. The check valve 12 is provided so that each check valve 12 and the anti-jamming piece 16 always open and close in conjunction with each other, and the difference in weight between the anti-jamming piece 16 and the check valve 12 makes the check valve 12 lighter. , or by adjusting the pressure firmly to prevent the check valve 12 from opening due to slight vibrations of the vehicle body, etc., thereby effectively preventing dust from entering the vehicle interior. A jamming prevention piece 16 prevents the air vent from getting caught or jammed by the notch protrusion 6a of the air circulation hole 6 during ventilation of the vehicle.

Although the ventilation box 7 is made of a metallic material in the above embodiment, it is not limited to this and may be made of a synthetic resin material.

This idea is to install a ventilation box equipped with a ventilation hole and a check valve for opening and closing this ventilation hole on the back side of the air circulation hole formed in the body side panel as described above, The back side of the hole and
A jamming prevention piece formed in the shape of a band of flexible material with a fixed upper end is provided between the check valve and the check valve installed facing the air circulation hole, so that the check valve prevents the air from flowing when the vehicle is ventilated. Since it is designed to prevent it from getting caught in the notched protrusion of the hole, the following excellent effects can be achieved.

(a) It is possible to reliably prevent dust and air containing dirt from entering the vehicle interior from outside the vehicle even if the interior of the vehicle is under negative pressure while the vehicle is running.

(b) Since the flap of the check valve is suppressed by the difference in weight between the check valve and the jamming prevention piece, noise during ventilation can be reduced, and even if there is some vehicle body vibration, the jamming prevention piece can prevent the check valve from opening. As a result, it is possible to reliably prevent dust and air containing dirt from entering the vehicle interior.

(c) Although the space is limited, the area for air circulation can be large, and since only the minimum number of holes for air circulation need be made in the panel, the strength of the panel can be maintained sufficiently.

(d) In addition, since the ventilation box is attached from the back side of the panel, assembly workability is improved, and since the check valve is placed between the panels, the shape and material can be freely set, and the aesthetic appearance can be improved. Furthermore, unlike conventional ventilation systems, there is no difference in ventilation time lag due to differences in air volume or speed, so the ventilation holes can be opened and closed reliably and quickly.

[Brief explanation of drawings]

Figure 1 is a side view of the front of a vehicle in which this invention has been implemented, Figure 2 is a front view of the outer panel with the ventilation system attached, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is FIG. 5 is an exploded perspective view of the ventilation device, and FIG. 5 is a longitudinal sectional view of the ventilation device. 1... Ventilation system, 5... Panel (outer panel),
6... Air circulation hole, 7... Ventilation box, 12... Check valve, 16... Biting prevention piece.

Claims (1)

[Scope of utility model registration request] A ventilation box equipped with a ventilation hole and a check valve for opening and closing the ventilation hole is installed on the back side of the air circulation hole formed in the body side panel, and A jamming prevention piece formed in the shape of a band of flexible material with a fixed upper end is installed between the check valve and the check valve installed facing the air flow hole, so that the check valve can prevent the air flow hole from opening when the vehicle is ventilated. A ventilation system for a vehicle configured to prevent the device from getting caught in a notched protrusion.