JPH092048A - Ventilation device - Google Patents

Abstract

PURPOSE: To provide a ventilation device which reduces fitting manhour and is useful for preventing water invasion. CONSTITUTION: This ventilation device to be fitted to an opening part provided on a vehicle is provided with an inner frame body 1 on which a plurality of exhaust ports (e) discharging air in a vehicle room outward are formed, an elastic seat plate 2 which is fitted to the outside of the vehicle of the inner frame body 1, formed into a plate, provided with tongue piece parts 21 covering the respective exhaust ports (e) by forming slits 23 along the circumferential edges except the upper edges concerning the respective exhaust ports (e), and opens the tongue piece parts 21 only in the direction outside the vehicle by difference of the inner and outer pressure, and an outer frame body 3 fixedly secured to the inner frame body 1 through the elastic seat plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation provided to ensure ventilation of a vehicle interior while a vehicle is running and to prevent foreign matter and exhaust gas from entering the vehicle interior when the vehicle is stopped. Regarding the device.

[0002]

2. Description of the Related Art At the rear of a vehicle, there is a ventilation device for displacing air in a vehicle compartment while the vehicle is running. Air that has entered from the front of the passenger compartment or the like is exhausted to the outside of the vehicle through the exhaust port of the ventilation device. A flap is attached to the opening frame forming the exhaust port, and during traveling, the flap changes its opening degree according to the pressure difference between the inside and outside of the vehicle compartment to adjust the air volume. Further, when the vehicle is stopped, the flap covers the exhaust port to prevent foreign matter from entering the vehicle interior from the outside. Further, when the pressure inside the vehicle is lower than the external pressure, such as when a window is opened during traveling, the flap is in close contact with the exhaust port to prevent backflow of exhaust gas and the like.

[0003] Such a ventilator has been improved and has been constituted by an opening frame 6, a flap 7 and a rubber packing 8 as shown in Figs. 9 to 14, for example. The opening frame 6 is
It is made of synthetic resin, and is provided with a plurality of exhaust ports e. Further, the water entry prevention wall 64 is projected from the outside of the vehicle body panel S to the inside. At the exhaust port e, the indoor air is guided to the outside of the vehicle, and
A flap 7 is attached to prevent gas and water from entering from outside the vehicle. The flap 7 is a molded product of non-mineral oil resistant rubber or a thin sheet (usually 0.5 mm to 0.8 mm).
A punched product having a thickness of 1) is used, and a plurality of umbrella-shaped inserts 71 are provided on the upper edge of the flap 7 via suspension legs 72 at regular intervals. This insert 71 is used as the opening frame 6
The flap 7 is rotatably attached to the suspension foot portion 72 as a fulcrum by being inserted into the square hole 61 (FIG. 13), and the flap 7 normally covers the exhaust port e (FIG. 11, FIG. 11).
(FIG. 12). Then, when the vehicle interior pressure becomes higher than the vehicle exterior pressure, the entire flap tilts and moves away from the opening frame 6, and ventilation is performed in the vehicle interior. Reference numeral 62 indicates a locking claw provided on the side wall of the opening frame 6, and the opening frame 6 is fixed to the edge of the opening by the locking claw 62 and its own outer frame outer peripheral portion 63. (Figs. 10 and 12). The rubber packing 8 is interposed between the outer peripheral portion 63 of the opening frame and the surface of the vehicle body panel S for the purpose of preventing water from entering when fixing the opening frame 6 to the vehicle body panel S. The rubber packing 8 is a long piece of cellular rubber (usually a closed-cell sponge such as EPDM), and is attached to the opening frame 6 by a double-sided tape or the like before the opening frame 6 is attached to the vehicle body panel opening d.
Is affixed to the inner peripheral surface of (FIG. 10). The symbol B indicates a bumper.

[0004]

However, in the ventilation device as described above, the inserts 71, 71, ... Of the flap 7 are formed.
Had to be inserted into the respective square holes 61, 61, ... Provided in the opening frame 6, which was very time-consuming to assemble. As the number of exhaust ports e increases, the number of flaps 7 also increases, resulting in an increase in assembly man-hours. Ideally, the insert body pitch P of the flap 7 is around 30 mm (Fig. 9). If the pitch is made larger than this, the flap 7 warps and deforms between the pitches, and further, it is received by water pressure from outside the vehicle. There was a possibility that the face would fall off. Therefore, the number of inserts 71 cannot be reduced in order to reduce the number of assembling steps. Further, the work of sticking the rubber packing 8 on the inner peripheral surface of the opening frame 6 is also a factor of increasing the number of assembling steps of the ventilation device, and the burden on the operator is heavy. In addition, the flap 7 is set to have a dimension of the suspension foot portion smaller than that of the square hole of the opening frame so that the opening degree can be changed according to the pressure difference between the inside and outside of the vehicle compartment. There is a possibility that water may enter the gap 61 through the gap α (FIG. 14).

The present invention solves the above problems,
It is an object of the present invention to provide a ventilation device that reduces the number of assembly steps and also helps prevent water from entering.

[0006]

In order to achieve the above object,
The gist of the first aspect of the present invention is, in a ventilation device attached to an opening provided in a vehicle, an inner frame body having a plurality of exhaust ports for exhausting air inside the vehicle to the outside of the vehicle, and an inner frame body outside the vehicle. A tongue portion is attached to cover each exhaust port by a slit provided along a peripheral edge other than the upper edge of each exhaust port, and a tongue portion is provided on the outside of the vehicle due to a pressure difference between the inside and the outside. The ventilator is characterized by including an elastic sheet plate that opens the tongue portion only on the inner side and an outer frame body that is fixed to the inner frame body with the elastic sheet plate sandwiched therebetween. Here, the "elastic sheet plate" means
It refers to a plate-shaped body having a low elastic modulus and capable of elastically deforming with a small external force, for example, a plate-shaped body made of a rubber material.

The ventilator of the second aspect of the present invention is such that the elastic sheet plate and the outer frame of the first aspect of the present invention are made larger than the opening, while allowing the inner frame to be inserted into the opening and engaging the inner frame. A stop claw is provided, and the locking claw and the outer frame body are sandwiched and fixed to the edge of the opening. The ventilator according to the third aspect of the present invention is characterized in that, in the first aspect or the second aspect, a discontinuous slit is formed along an upper edge of the elastic sheet plate that is associated with the exhaust port. A ventilator according to a fourth aspect of the present invention is the ventilator according to the second aspect or the third aspect, wherein the outer frame body faces the elastic sheet plate and integrally forms a ridge portion along the outer peripheral edge.

[0008]

As in the ventilator of the first aspect of the invention, a tongue portion for covering each exhaust port is provided by forming slits along the peripheral edges other than the upper edge of each exhaust port. When the elastic sheet plate is formed so as to be opened only in the outer direction, the tongue piece acts as a flap only by attaching the elastic sheet plate to the inner frame. Therefore, it is possible to save the labor of inserting the individual flaps into the opening frame as in the conventional case. Further, as in the ventilator of the second invention, the elastic sheet plate and the outer frame are made larger than the opening, while the inner frame can be inserted into the opening and the locking claw is attached to the side wall of the inner frame. With the configuration in which the elastic claw and the outer frame body are sandwiched and fixed to the edge of the opening, the elastic sheet plate itself plays a role of packing, so that a rubber packing is provided between the ventilation device and the vehicle body panel. There is no need to intervene. When the discontinuous slit is formed along the upper edge of the elastic sheet plate, which corresponds to the exhaust port, like the ventilator of the third invention, the opening degree of the tongue piece is changed according to the pressure difference between the inside and outside of the vehicle, and the flap is closed. It becomes easier to adjust the opening. Like the ventilator of the fourth invention, when the protrusion is formed along the outer peripheral edge of the outer frame body facing the elastic sheet plate, the protrusion is attached to the vehicle body panel when the ventilation device is attached to the vehicle body panel. Since the elastic sheet plate is strongly pressed by, the sealing property is further enhanced.

[0009]

【Example】

(1) Example 1 Hereinafter, a ventilation device according to the present invention will be described in detail based on examples. 1 to 6 show an embodiment of the ventilation device of the present invention,
It is applied to a ventilation device attached to the back of the bumper of a passenger car. 1 is an exploded perspective view of the ventilation device, FIG. 2 is a perspective view of the inner frame body of FIG. 1 with an elastic sheet plate assembled, and FIG. 3 is an outer frame of the inner frame body with the elastic sheet plate of FIG. FIG. 4 is a perspective view of a ventilation device with the body fixed, FIG. 4 is an explanatory perspective view of attaching the ventilation device of FIG. 3 to a vehicle body panel opening, and FIG. 5 is a vertical cross-sectional view of the ventilation device attached to the vehicle body panel opening. 6 is shown in FIG.
FIG.

The ventilation device of the present invention has a three-part construction including an inner frame body 1, an elastic sheet plate 2 and an outer frame body 3. Here, instead of assembling individual flaps for each exhaust port e,
An elastic sheet plate 2 of approximately the same size as the outer frame body 3 is used, and a tongue piece portion 21 formed by forming a slit in conformity with the shape of the exhaust port serves as a flap. The ventilation device A is constructed by assembling the elastic sheet plate 2 with the inner frame body 1 and the outer frame body 3 sandwiched therebetween. The ventilation device A is inserted into the opening d from the outside of the vehicle body panel S and fixed to the edge of the opening with the locking claw 17 and the outer frame body 3 (FIG. 4).

The inner frame 1 is formed by connecting the inclined wall 12 and the horizontal wall 13 at three positions in the vertical direction of the vertical wall 11 in a ∠-shaped vertical cross section, and is surrounded by the inclined wall 12 and the horizontal wall 13. The frame has a rectangular exhaust port e formed therein. Reinforcement ribs 14 are provided on the exhaust port e, and the outer wall of each inclined wall 12 and the horizontal wall 13 has a distance from the plate surface of the vertical wall 11 corresponding to the thickness of the elastic sheet plate plus the outer frame thickness. Are separated from each other to form the locking projection 15. By fitting the outer frame body 3 into the inner frame body 1 with the elastic sheet plate 2 sandwiched therebetween, the outer frame body 3 is fixed by the locking projections 15, and the inner frame body 1, the elastic sheet plate 2,
The outer frame body 3 can be integrated. The locking projection 15 has a substantially right-angled triangular shape in plan view which increases in thickness toward the vertical wall so that the outer frame body 3 can be easily fitted and the stopper function can be exerted (FIG. 6). On the front side of the vertical wall 11 (the front side means the outside of the vehicle when the ventilation device A is attached to the opening d), the upper part of the exhaust port e and the vertical wall 1 are provided.
1. Positioning pins 16 are erected at regular intervals along the outer circumference. This positioning pin 16 has a diameter of about 1.5 mmφ
It is a cylindrical body having a diameter of 2 mm and a height of about 3 mm, and is used for positioning when the elastic sheet plate 2 is set on the inner frame body 1.

Reference numeral 17 is a wedge-shaped locking claw integrally formed on the vertical wall 11 by utilizing the rear surface on the vehicle compartment side at three points on the side of the vertical wall, and the size of the vertical wall 11 is defined by the opening of the vehicle body panel S. The inner frame 1 can be inserted into the opening d by making it slightly smaller than the portion d, while the locking claw 17 elastically deforms the edge of the opening to pass through, and the ventilation device A and the outer frame 3 are opened. It can be clamped and fixed to the edge (Fig. 6). In this embodiment, the inner frame body 1
The outer peripheral dimension of is set to be smaller than the opening d of the vehicle body panel S by about 1 mm over the entire circumference to prevent interference during assembly to the vehicle body panel S. Reference numeral 18 denotes a back surface side of the vertical wall 11, which is a curved tubular water entry prevention wall extended so as to surround the lowermost exhaust port e. The inner frame 1 as described above is a molded product made of synthetic resin (for example, polypropylene), and the above-mentioned constituent parts are integrally molded.

The elastic sheet plate 2 has a thickness of 0.5 mm to 0.8 m.
It is a thin plate with a thickness of m and is made of a punched product made of non-mineral oil resistant rubber such as ethylene-propylene-diene rubber (EPDM). The outer dimension of the elastic sheet plate 2 is set to be 8 mm to 10 mm larger than the opening d of the vehicle body panel S, and when the ventilation device A is assembled to the opening d, the outer peripheral portion 22 of the elastic sheet plate 2 is an outer frame body. It is interposed between the vehicle body 3 and the vehicle body panel S so that it can serve as a packing. Reference numeral 23 indicates a slit punched along the peripheral edge other than the upper edge of each exhaust port e (FIG. 1). The tongue portion 21 formed by the slit 23 plays a role of a flap that is a valve body in the conventional ventilation device A, and when the elastic sheet plate 2 is set to the inner frame body 1, an inclined wall that forms an exhaust port e. 12 and the opening f of the horizontal wall 13, and the exhaust port e is covered. When the elastic sheet plate 2 is set on the inner frame 1 (FIG. 2), the tongue portion 21 is bent at the upper wall of the exhaust port e at a slanted wall angle, and the tongue portion 21 is mounted as a ventilation device and is used as a vehicle interior pressure. When the pressure becomes higher than the vehicle exterior pressure, the tongue portion 21 is further bent around the upper edge portion thereof to open the exhaust port e (FIG. 5).

Further, in this embodiment, a horizontally long discontinuous slit 24 is formed in the elastic sheet plate 2 along the upper edge of the exhaust port e. By providing the discontinuous slit 24, the bending resistance at the time of opening the tongue portion 21 is reduced and the valve opening characteristic is improved. As a result, even if the thickness of the elastic sheet plate 2 is increased to some extent, the opening degree of the tongue portion 21 changes according to the pressure difference between the inside and outside of the vehicle compartment, and the air volume can be adjusted. Small holes 25 are punched in the elastic sheet plate 2 corresponding to the positioning pins 16 provided in the inner frame body 1.
The elastic sheet plate 2 is a punched product in which the slits 23, the discontinuous slits 24, and the small holes 25 are formed at the same time while ensuring the outer dimensions as described above.

The outer frame body 3 is a frame frame in which the exhaust port e is open and, like the inner frame body 1, is made of a synthetic resin molded product such as polypropylene. The outer dimensions of the outer frame 3 are the same as or greater than those of the elastic sheet plate 2, and the outer peripheral portion 34 thereof is
A flange 31 for increasing the rigidity is integrally formed. Reference numeral 32 is a pressing portion, which fixes the elastic sheet plate 2 between the tongue pieces 21 and 21 which acts as a flap. Similar to the elastic sheet plate 2, the outer frame 3 also has small holes 3 corresponding to the positioning pins 16 provided on the inner frame 1.
3 is opened.

Next, a procedure for assembling and attaching the ventilation device A using the inner frame body 1, the elastic sheet plate 2, and the outer frame body 3 will be described. First, place the elastic sheet plate 2 on the surface of the inner frame body 1,
The positioning pins 16, 16, ... Are inserted into the small holes 25, and the elastic sheet plate 2 is temporarily set on the inner frame 1 (FIG. 2). Next, the outer frame body 3 is placed on this and the elastic sheet plate 2 is sandwiched (FIG. 3). By positioning the positioning pin 16 through the small hole 33, the positioning of the outer frame body 3 is ensured. Then, the locking projections 15 provided on the inclined wall 12 and the horizontal wall 13 of the inner frame body 1 are engaged with the locking surface 3a (front surface) of the outer frame body 3 so that the inner frame body 1 and the elastic sheet plate. 2. The outer frame body 3 is integrally fixed. The ventilation device A assembled in this way is
Then, it is pressed against the opening d of the vehicle body panel S from the outside side of the vehicle. The inner frame 1 passes through the opening d, and the locking claw 17
Comes into contact with the back surface of the opening edge, and the locking claw 17 and the outer peripheral portion 34 of the outer frame body 3 sandwich the vehicle body panel S, whereby the ventilation device A is fixed to the vehicle body panel S (FIG. 4). . Here, since the outer dimensions of the elastic sheet plate 2 and the outer frame body 3 are larger than the outer dimensions of the inner frame body 1, these stop on the front side of the opening d, and the outer peripheral portion 22 of the elastic sheet plate 2 is It plays the role of packing that surrounds the edge of the opening (Fig. 6). Therefore, by only pushing the ventilation device A into the opening d, the rubber packing 8
Even without the above, the ventilating device A is attached to the vehicle body panel S by exerting an effect of preventing water entry.

In the ventilator A thus constructed, each tongue piece portion 21 serving as a flap is present in one elastic sheet plate 2, so that not only the number of parts is reduced but also the conventional corners are used. Since the fitting and assembling of the flap 7 into the hole 61 is eliminated, the troublesome work is released. The elastic sheet plate 2 is sandwiched between the inner frame body 1 and the outer frame body 3 and the outer frame body 3 is fixed to the locking projections 15, so that the ventilation device A can be completed. . Further, since the elastic sheet plate 2 and the outer frame body 3 are larger than the opening d, the outer peripheral portion 22 of the elastic sheet plate 2 functions as a water-proof packing, and a long product which has been conventionally used as the rubber packing 8. There is no need for a rubber sponge, which has the added benefit of reducing the number of parts and the number of assembly steps. Particularly, since the elastic sheet plate 2 is made of a rubber sheet, a reliable seal can be achieved even with a slight pressure contact, and the outer peripheral portion 22
It is effective in preventing water entry. Further, the tongue piece portion 21 is attached to the opening d only by placing the positioning pin 16 through the small hole 25 and placing the elastic sheet plate 2 on the inner frame body 1. Therefore, the flap insertion body 71 is inserted into the square hole 61. Unlike the conventional insertion structure, the gap α is not generated (see FIG. 14), and the effect of preventing water entry is improved.

In addition, if the ventilator A is pushed into the opening d from the outside of the vehicle, the ventilator A can be easily clamped and fixed to the edge of the opening by the locking claw 17 and the outer frame 3. The clamping force tightens the outer peripheral portion 22 of the elastic sheet plate 2 and exerts an effective action such as exhibiting a sealing function. Since the gap Z is secured between the inner frame 1 and the opening d, the ventilation device can be easily attached to the vehicle body panel S (FIG. 5). Further, if the discontinuous slit 24 is provided, the tongue portion 21 can be easily operated while widening the material and thickness selection range of the elastic sheet plate 2, so that the flap action and the sealing action of the elastic sheet plate 2 are handled. You will be able to adjust the two better.

(2) Embodiment 2 As shown in FIG. 7, the ventilator of this embodiment has a ridge 3 having an inverted V-shaped cross section on the outer peripheral portion 34 on the side facing the elastic sheet plate 2.
5 is provided. FIG. 7 corresponds to a partially enlarged view of FIG. The protruding portion 35 is shaped to surround the opening d along the outer peripheral edge. The size of the protrusion 35 is the elastic sheet plate 2
The width is about 1 mm and the height is about 0.3 mm to 0.5 mm. Other configurations are the same as those of the first embodiment. In addition to the actions and effects of the first embodiment, the ventilator configured as described above has the protrusion 35 bite into the elastic sheet plate 2 when it is attached to the opening d of the ventilator, so that the ventilator seals against the vehicle body panel S. Sex is further improved.

(3) Embodiment 3 In the ventilation device of this embodiment, instead of the discontinuous slit 24,
A concave groove 26 as shown in FIG. 8 is formed on the front side of the elastic sheet plate 2. FIG. 8 corresponds to a partially enlarged view of FIG. Unlike the discontinuous slit 24, the groove 26 has a tongue piece 2
1 is not separated from the elastic sheet plate 2, so the exhaust port e
A continuous groove can be formed along the upper edge of the above. Groove 2
The size of 6 is appropriately selected depending on the thickness of the elastic sheet plate 2. Other configurations are the same as those of the first embodiment. In addition to the actions and effects of the first embodiment, the ventilator configured in this way eliminates the slits of the discontinuous slits 24 that are connected to the passenger compartment side of the ventilator, so that gas and water intrusion from outside the vehicle using this can be prevented. Since it is possible to shut out, the sealing action of the elastic sheet plate 2 works more reliably. Of course, groove 2
By forming 6, the tongue portion 21 changes the opening degree according to the pressure difference between the inside and outside of the vehicle compartment, and facilitates the adjustment of the air volume.

In the present invention, the present invention is not limited to those shown in the above embodiments, but can be variously changed within the scope of the present invention depending on the purpose and application. Inner frame 1, elastic sheet plate 2, outer frame 3
Can appropriately select the shape and constituent material of each part according to the performance, application, required strength, etc. of the ventilation device. Further, in the embodiment, the inner frame body 1 and the outer frame body 3 are completely separate parts, and the elastic sheet plate 2 is sandwiched therebetween.
May be integrally formed at the upper part or the lower part via a hinge part, and the elastic sheet plate 2 may be sandwiched between them by bending around the hinge part.

[0022]

As described above, the ventilation device according to the present invention is easy to assemble and has a small number of parts.
It exhibits excellent effects such as labor saving, cost reduction, and quality improvement, such as improved sealing of the exhaust port.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a ventilation device according to a first exemplary embodiment.

FIG. 2 is a perspective view in which an elastic sheet plate is assembled to the inner frame body of FIG.

FIG. 3 is a perspective view of a ventilation device in which an outer frame body is fixed to an inner frame body with the elastic sheet plate of FIG. 2 interposed therebetween.

FIG. 4 is an explanatory perspective view of attaching the ventilation device of FIG. 3 to an opening portion of a vehicle body panel.

FIG. 5 is a vertical cross-sectional view of a ventilation device attached to a vehicle body panel opening.

FIG. 6 is a cross-sectional view of FIG.

FIG. 7 is a partially enlarged cross-sectional view around a ridge when the ventilation device is attached to the vehicle body panel in the second embodiment.

FIG. 8 is a partially enlarged vertical sectional view of the vicinity of an upper portion of a tongue piece according to the third embodiment.

FIG. 9 is an exploded perspective view of a conventional ventilation device.

FIG. 10 is an explanatory perspective view of attaching a conventional ventilation device to a vehicle body panel opening.

11 is a longitudinal sectional view of FIG.

FIG. 12 is a cross-sectional view of FIG.

FIG. 13 is a partial cross-sectional perspective view showing insertion of a flap into a square hole in a conventional ventilation device.

FIG. 14 is a partially enlarged perspective view showing a state in which a flap is inserted into a square hole.

[Explanation of symbols]

 1 Inner Frame 17 Locking Claw 2 Elastic Sheet Plate 21 Tongue Piece 23 Slit 24 Discontinuous Slit 3 Outer Frame 35 Ridge A Ventilation Device d Opening e Exhaust Port

Claims (4)

[Claims] 1. A ventilator attached to an opening provided in a vehicle, wherein an inner frame body (1) having a plurality of exhaust ports for exhausting air inside the vehicle is provided, and an outer frame of the inner frame body. A tongue portion is attached to cover each exhaust port by a slit provided along a peripheral edge other than the upper edge of each exhaust port, and a tongue portion is provided on the outside of the vehicle due to a pressure difference between the inside and the outside. A ventilator comprising: an elastic sheet plate (2) for opening the tongue portion only at the inner side and an outer frame body (3) fixed to the inner frame body with the elastic sheet plate sandwiched therebetween. 2. The elastic sheet plate and the outer frame are made larger than the opening, while the inner frame can be inserted into the opening and a locking claw is provided on the inner frame, and the engaging is provided at the edge of the opening. The ventilation device according to claim 1, wherein the retaining claw and the outer frame body are clamped and fixed. 3. The ventilation device according to claim 1, wherein a discontinuous slit is formed along an upper edge of the elastic sheet plate which is associated with the exhaust port. 4. The ventilation device according to claim 2, wherein the outer frame body is integrally formed with a ridge portion along the outer peripheral edge of the outer frame body, facing the elastic sheet plate.