JP3286245B2 - Vehicle ventilation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating apparatus for a vehicle, for example, which permits an airflow from a vehicle compartment to the outside of the vehicle.

[0002]

2. Description of the Related Art Conventionally, a vehicle is provided at an opening portion that connects the interior of a vehicle to the outside of the vehicle to shield outside air or rainwater from the outside of the vehicle toward the interior of the vehicle, while closing the door or activating an airbag device. Allow airflow from the room to the outside of the car,
2. Description of the Related Art A vehicle ventilator for suppressing an increase in air pressure in a vehicle compartment is known.

[0003] For example, Japanese Patent Application Laid-Open No. 8-324228 describes
The publication discloses a configuration in which a rubber sheet-like valve is arranged to be openable and closable on the vehicle outside of a lattice-shaped ventilation port provided in a cylindrical ventilation device body. And in this configuration,
Using a valve retainer with a plurality of mounting bosses protruding, insert the mounting bosses of this valve retainer into the mounting holes provided in the valve and the ventilator main body respectively, and heat and heat the upper end of the valve to the ventilator main body and the valve. The valve is clamped and fixed by the presser, and the valve is attached to the ventilator body.

However, Japanese Patent Application Laid-Open No. 8-32422 discloses
In the configuration using a separate valve retainer as described in Japanese Patent Publication No. 8 (1994), the material cost, the die cost, the number of assembling steps and the like increase, and it is not easy to reduce the manufacturing cost.

[0005] In this regard, a configuration is conceivable in which the valve is attached to the ventilator body by using vibration welding in which the resins are ultrasonically vibrated in contact with each other, and heated and melted and welded to each other.

However, in the vibration welding, since the molten resin is deformed so as to move from the welded portion to the periphery,
The valve may be curved so as to rise from the vent of the ventilation device main body, and it may be difficult to improve the airtightness.

In order to improve the efficiency of ventilation, it is necessary to reduce the size of the welded portion and to secure a large opening portion of the vent, and to improve the durability of the welded portion which holds a valve which is repeatedly opened and closed. Is required.

[0008]

As described above, the manufacturing cost can be reduced by mounting the valve on the main body of the ventilator using vibration welding, but the airtightness and the durability are further improved. Is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle ventilation device that can reduce manufacturing costs and improve airtightness and durability.

[0010]

Vehicle ventilating device according to claim 1 SUMMARY OF THE INVENTION The ventilation instrumentation having a frame portion made of resin having a ventilation opening
The main body and a valve that covers one side of the ventilation opening so that it can be opened and closed
A fixing portion fixed along one side of the body portion and the frame portion;
A resin valve provided integrally therewith, and
A vibration welding portion that is vibration welded to the frame portion,
Multiple comprising the vibration welding portion at predetermined intervals along the longitudinal direction, a direction inclined with respect to the longitudinal direction of the fixing portion and the longitudinal direction, those that are substantially parallel to each other.

In this structure, vibration welding is used.
By attaching a valve to the ventilator body,
Compared to the configuration of mounting the valve using parts,
The strike can be reduced. The vibration welding part is the length of this fixed part.
Secured by providing multiple at predetermined intervals along the hand direction
Compared to a configuration where vibration welding is continuously performed over the entire length of the part
The deformation of the valve is suppressed, and the airtightness is easily improved.
You. Furthermore, since a plurality of vibration welding portions having a large longitudinal dimension are arranged in a narrow portion, the fixing strength against stress from a valve that is repeatedly opened and closed is improved, and the durability is improved.

[0012] The ventilating device for a vehicle according to the second aspect is provided.
In the vehicle ventilating device according to 1 , the longitudinal direction of the vibration welding portion forms an angle of 30 degrees or more and 60 degrees or less with respect to the longitudinal direction of the fixing portion.

In this configuration, both improvement of airtightness by suppressing deformation of the valve and improvement of fixing strength, that is, durability of the valve are compatible.

According to a third aspect of the present invention, there is provided a vehicle ventilating apparatus.
3. In the vehicle ventilation device according to 2, the width of the vibration welding portion along a direction perpendicular to the longitudinal direction of the vibration welding portion is 0.5 mm or more and 1.0 mm or less, and is perpendicular to the longitudinal direction of the vibration welding portion. It is formed so that the distance between them along the direction is 1.0 mm or more and 1.5 mm or less.

In this configuration, the improvement of airtightness by suppressing the deformation of the valve and the improvement of the fixing strength, that is, the durability of the valve are compatible.

According to a fourth aspect of the present invention, in the vehicle ventilator according to any one of the first to third aspects, the valve applies an urging force in a direction in which the fixed portion and the valve body are positioned flush with each other. The surface of one side of the frame portion to which the fixing portion is fixed has an angle with respect to a surface with which the valve body abuts, which is larger than 0 degree and 1 degree.
In this case, a mounting surface portion having an angle of 35 degrees or less is formed.

In this configuration, the valve body is urged in the direction in which the valve body comes into close contact with the ventilation port by the urging force of the valve in a state in which the fixing portion of the valve is fixed to the mounting surface, and the airtightness is improved.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle ventilation system according to an embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a drafter (duct drafter) as a vehicle ventilation device. The drafter 1 is provided on the inside of a trunk or a bumper of a vehicle such as an automobile. The so-called one-way valve is mounted on an opening communicating with the inside and outside, and allows only the airflow from the inside I to the outside O as one side when the air pressure in the vehicle interior becomes high.

The drafter 1 includes a drafter body (duct drafter body) 11 as a ventilation device body fixed to a partition wall provided on the vehicle body, and a valve (one-way valve) 12 attached to the drafter body 11. ing.

The drafter main body 11 is integrally formed of resin such as polypropylene (PP) by injection molding or the like, and has a rectangular cylindrical shape with an air passage formed therein.
It has fifteen. A large-diameter exhaust port 16 is formed at the end of the cylindrical portion 15 on the outside O of the vehicle, and the vicinity of the exhaust port 16 is adapted to be fitted to a vehicle body or the like. A frame 17 having a frame shape is formed on the inner peripheral edge of the end of the cylindrical portion 15 on the vehicle inner side I, and a ventilation port 18 is formed inside the frame 17. Also, this frame portion 17
While being slightly inclined downward, the upper side which is one side of the frame portion 17 is bent by a line along the longitudinal direction, and the cylindrical portion is formed.
Inside 15, there is formed a mounting surface portion 21 which is vertical, that is, forms an angle of 135 ° or less with the inner surface of the other portion of the frame portion 17. Further, inside the frame portion 17, a lattice portion 23 that is inclined flush with the frame portion 17 is formed, and the ventilation port 18 is divided into a plurality.

The valve 12 has a substantially rectangular plate shape integrally formed of a flexible deformable resin such as olefin-based thermoplastic elastomer (TPE). It has become like a state.
The valve 12 is disposed along the inner surface of the frame portion 17, and a portion along the upper edge portion is provided on the frame portion of the drafter main body 11.
A fixing portion 25 is formed on the mounting surface portion 21 of the fixing member 17 in a predetermined welding pattern, and the other portion abuts on the frame portion 17 and the lattice portion 23 and closes the ventilation port 18 so as to be openable and closable. Part 26.

The welding pattern for fixing the mounting surface portion 21 of the drafter main body 11 and the fixing portion 25 of the valve 12 is composed of a number of vibration welding portions obtained by vibration welding of resins, that is, ultrasonic welding.
31 are arranged at predetermined intervals. That is, these vibration welding portions 31 are arranged on the mounting surface portion 21.
Is a strip-shaped portion A excluding an upper margin U along the upper edge and a lower margin B along the lower edge. Further, each of the vibration welding portions 31 is a linear rod having a predetermined width dimension W, and is parallel to each other at a predetermined interval D in a band-shaped portion A, and
The longitudinal direction of each vibration welding portion 31 is arranged to be inclined by a predetermined angle θ with respect to the longitudinal direction of the mounting surface portion 21, that is, the horizontal direction.

In the present embodiment, the width of the strip-shaped portion A is 3.5 mm, the width of the upper margin U is 1.0 mm,
The width dimension of the lower margin B is 2.0 mm, the width dimension W of each vibration welding part 31 is 0.5 mm, the interval D between each vibration welding part 31 is 1.0 mm, and the inclination angle θ is 45 degrees. As a result, the length dimension C of each vibration welding portion 31 is 4.9 mm. The thickness t of the valve 12 is 0.25 mm.

In the present embodiment, the drafter body 11
Was used as the material of polypropylene, and the material of the valve 12 was made of an olefin-based thermoplastic elastomer. These materials may be those that can be welded to each other. For example, when the material of the drafter body 11 is made of ABS resin, Is the valve
When the material 12 is a styrene thermoplastic elastomer, a vinyl chloride thermoplastic elastomer, or a soft vinyl chloride, and the material of the drafter body 11 is polypropylene, the material of the valve 12 is made of a soft material other than the olefin thermoplastic elastomer. When polypropylene is used, and furthermore, when the material of the drafter main body 11 is Noryl (PPO), the material of the valve 12 can be a styrene-based thermoplastic elastomer. The material properties of the valve 12 are as follows:
Tensile strength of 140 to 160 kg / c
m ² ], elongation 930-980%, specific gravity 0.93
2. The thickness can be 0.25 mm.

The drafter 1 operates in a state where there is no pressure difference between the inside I and the outside O, or when the pressure on the outside O becomes relatively higher than the pressure on the inside I.
The valve 12 is pressed against the inclined frame portion 17 by the biasing force and its own weight that tends to return and deform, and closes the ventilation port 18 airtightly to prevent outside air and rainwater from entering the inside of the vehicle. On the other hand, when the pressure on the inside I becomes relatively higher than the pressure on the outside O, such as when the door of the car is closed or the airbag device is activated, the valve 12 is
The ventilation opening 18 is opened by deforming so as to rise from the frame portion 17, and the inside I and the outside O are communicated to adjust the air pressure in the cabin.

Next, an ultrasonic welding machine 33 as a manufacturing apparatus for welding the drafter main body 11 and the valve 12 of the drafter 1 is used.
The manufacturing process will be described with reference to FIGS.

The ultrasonic welding machine 33 includes a horn 35
And a welding machine main body 36 connected to the upper side of the horn 35,
A pedestal 37 provided facing the lower side of the horn 35, a control device (not shown), and the like are provided. And the welding machine body
36 is equipped with a transducer that transmits ultrasonic waves,
A drive device for vertically moving the horn 35 is provided, and the horn 35 is pressed downward with a predetermined pressure. The mount 37 holds the drafter main body 11 of the drafter 1 at a predetermined position. And the horn 35 is a valve
An abutting surface that abuts on 12 is provided with a concavo-convex portion 41 that amplifies ultrasonic waves of the welding machine main body 36 and outputs the amplified ultrasonic waves as ultrasonic vibrations. That is, the uneven portion 41 is pressed by the fixing portion 25 of the valve 12 to form the vibration welded portion 31, and includes a convex ridge 42 having substantially the same planar shape as the vibration welded portion 31, and a gap between these convex ridges 42. Are alternately formed. The protrusion dimension H of the ridge 42 based on the recess 43 is the thickness t of the valve 12.
It is set larger, for example, 0.3 mm to 0.5 mm.

Therefore, as shown in FIG. 7, the drafter main body 11 is placed on
Next, the valve 12 is mounted. Then, the horn 35 of the ultrasonic welding machine 33 is moved from the valve 12 side to the drafter main body 11, and under predetermined conditions, for example, 2 kg / cm
² ], the drafter body 11 and the valve 12 are melted and joined to each other at the portions of the ridges 42, and after a cooling time of about 2.0 seconds, Are formed at the same time, and the drafter 1 is manufactured.

As described above, according to the present embodiment, the valve 12 is attached to the drafter main body 11 using vibration welding, so that a separate component, for example, a protector is thermally welded to attach the rubber valve. In comparison, the number of parts can be reduced, the material cost, the die cost, and the number of assembly steps can be reduced, and the manufacturing cost can be reduced. Also, as compared with a configuration in which heat welding is performed simply by heating, the speed of the work process can be increased, and the manufacturing cost can be reduced.

Instead of continuously welding the entire length of the fixing portion 25, the vibration welding portion 31 is formed on the fixing portion 25 by using a horn 35 in which convex ridges 42 and concave ridges 43 are alternately formed. By forming a plurality at predetermined intervals along the longitudinal direction, deformation of the valve 12 due to welding, i.e., suppression of wrinkles and warpage,
The airtightness can be easily improved. That is, in the protruding portion 42 of the horn 35, the valve 12 is pressed and melt-bonded, so that a reaction force is generated in the valve 12, but the protruding portion 42 and the concave portion 43
That is, since the melted portion and the unmelted portion are alternately arranged, no reaction force is generated in the unmelted portion, and the warpage of the valve 12 as a whole can be suppressed. Further, since the molten resin generated by being pressed by the convex ridges 42 flows into the concave ridges 43, it is possible to suppress the valve 12 from floating or warping due to excess molten resin.

Further, the vibration welding portions 31 are arranged substantially in parallel with each other in a direction inclining with respect to the longitudinal direction of the fixing portion 25, that is, the direction of the opening and closing axis of the valve 12, so that they are substantially parallel to each other. A plurality of vibration welding portions 31 having a large longitudinal dimension C can be arranged in a narrow band-shaped portion A, and the fixing strength against stress from the valve 12 which is repeatedly opened and closed, that is, the force against peeling is improved, and the durability is improved. Can be improved.

Further, since the fixing strength can be improved in this manner, as shown in FIG. 2, the dimension L of the ventilation port 18 can be secured to be larger than the width dimension of the mounting surface 21, and the efficiency of ventilation can be improved.

As a result of the experiment, the angle θ at which the vibration welding portion 31, that is, the convex portion 42 of the horn 35 is inclined with respect to the opening and closing axis of the valve 12 is 30 degrees or more and 60 degrees or less. The width W of the strip 42 is 0.5 mm or more and 1.0
mm or less, it is preferable that the interval D between the respective vibration welding portions 31, that is, the protruding ridges 42 is not less than 1.0 mm and not more than 1.5 mm. Further, the angle θ of the protruding ridges 42 is 45 degrees and the width dimension. With W being 0.5 mm and the interval D being 1.0 mm, both airtightness is improved by suppressing the occurrence of deformation such as wrinkles, and the fixing strength of the valve 12, that is, the durability of the wrinkles is improved. I was able to.

In addition, since the protrusion H of the protrusion 42 from the recess 43 is set to be larger than the thickness t of the valve 12,
The valve 12 can be brought into strong contact with the substrate of the drafter main body 11, that is, strong collision, so that variations in welding and variations in products can be absorbed.

In addition, the mounting surface portion 21 to which the fixing portion 25 of the sheet-shaped valve 12 is fixed is formed at a predetermined angle of 135 degrees or less with respect to the surface of the frame portion 17 and the lattice portion 23 with which the valve body portion 26 contacts. In order to achieve the above, the valve body is fixed by the urging force of the valve 12 with the fixing portion 25 of the valve 12 fixed to the mounting surface portion 21.
26 is urged in the direction in which it comes into close contact with the ventilation opening 18, and airtightness can be improved.

Further, since the upper margin U and the lower margin B are set above and below the belt-shaped portion A where the valve 12 and the mounting surface 21 of the drafter main body 11 are welded, the horn 35 of the ultrasonic welding machine 33 is provided. There is no need to improve the accuracy of
Manufacturing costs can be reduced.

In this manner, not only the manufacturing cost can be reduced by reducing the number of parts, but also the valve 12 can be firmly and stably joined to the drafter main body 11.
Can be suppressed, and the amount of reverse leakage, which is a basic function of the drafter 1, can be suppressed, that is, the ability to block air entering from outside the vehicle can be improved.

The welding pattern between the drafter main body 11 and the valve 12, that is, the horn (ultrasonic welding horn) 35 takes various shapes, and the same effect can be obtained. For example, as shown in FIG.
The angle θ of inclination with respect to the opening / closing axis of the valve 12 is 60 degrees, the width W is 1.0 mm, and the interval D between the ridges 42 is 1.5.
It may be mm. Also, as shown in FIG.
May be 30 degrees, the width W is 0.5 mm, and the distance D between the ridges 42 is 1.0 mm. Further, as shown in FIG. 11, with respect to the ridges 42 of the horn 35, the angle θ inclined with respect to the opening / closing axis of the valve 12 is 30 degrees, the width W is 0.5 mm, and the distance between the ridges 42 is The interval D may be 1.5 mm. Further, as shown in FIG. 12, with respect to the ridges 42 of the horn 35, the angle θ inclined with respect to the opening / closing axis of the valve 12 is 30 degrees, the width dimension W is 0.7 mm, and the distance between the ridges 42 is The interval D may be 1.4 mm.

The thickness t of the valve 12 is 0.25
It is not limited to mm, but may be about 0.2 mm or more and 1.0 mm or less.

The operating conditions of the horn 35 and the like of the ultrasonic welding machine 33 can be set to various values, for example, a pressing force of 2.5 [kg / cm ² ] and an oscillation time of 1.0. Seconds,
The cooling time can be about 2.0 seconds.

[0042]

According to the first aspect of the present invention , the valve is attached to the main body of the ventilator using vibration welding.
By using a separate component to install the valve
The manufacturing cost can be reduced as compared with the configuration. Vibration weld
A plurality of the fixing portions are provided at predetermined intervals along the longitudinal direction.
Vibration welding continuously over the entire length of the fixed part
Valve deformation is reduced and airtightness is easier than
Can be improved. Further, the vibration welding portion has a longitudinal direction that is inclined with respect to the longitudinal direction of the fixing portion, and is arranged substantially parallel to each other, so that a plurality of vibration welding portions having a large longitudinal dimension are arranged in a narrow portion. Thus, the fixing strength against the stress from the valve that is repeatedly opened and closed can be improved, and the durability can be improved.

According to the vehicle ventilating device of the second aspect ,
In addition to the effects described in claim 1 , the longitudinal direction of the vibration welding portion is set at an angle of 30 degrees or more and 60 degrees or less with respect to the longitudinal direction of the fixing portion, thereby improving airtightness by suppressing deformation of the valve. It is possible to achieve both improvement in the fixing strength of the valve, that is, durability.

According to the vehicle ventilation system of the third aspect ,
In addition to the effect of the second aspect , the vibration welding portion has a width dimension of 0.5 in a direction orthogonal to the longitudinal direction of the vibration welding portion.
mm or more and 1.0 mm or less, the distance between each other along a direction perpendicular to the longitudinal direction of the vibration welded portion is 1.0 mm or more and 1.5 mm or less.
When the thickness is not more than mm, it is possible to achieve both improvement in airtightness by suppressing deformation of the valve and improvement in fixing strength, that is, durability of the valve.

According to the vehicle ventilating device of the fourth aspect ,
In addition to the effects of any one of claims 1 to 3, in a state where the fixed portion of the valve is fixed to the mounting surface portion, the valve body is urged by the urging force of the valve in a direction in which the valve body comes into close contact with the ventilation port, thereby improving airtightness. Can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a vehicle ventilation device according to the present invention.

FIG. 2 is a cross-sectional view of the vehicle ventilation system.

FIG. 3 is a front view of the manufacturing apparatus for the vehicle ventilation device;

FIG. 4 is an explanatory view of a horn of the apparatus for manufacturing a vehicle ventilation device according to the first embodiment; (A) is a side view (b) is a front view

FIG. 5 is a perspective view of a part of the horn of the manufacturing apparatus for the vehicle ventilating device as viewed from below.

FIG. 6 is an explanatory view of a horn of the apparatus for manufacturing a vehicle ventilation device according to the first embodiment; (A) is an end view of the lower end. (B) is a sectional view taken along the line II of (a).

FIG. 7 is an explanatory view showing a manufacturing process of the vehicle ventilating device.

FIG. 8 is an end view of a part of a horn of the manufacturing apparatus for the vehicle ventilation device;

FIG. 9 is a partial end view showing another embodiment of the horn of the apparatus for manufacturing a vehicle ventilation device according to the present invention.

FIG. 10 is a partial end view showing still another embodiment of the horn of the apparatus for manufacturing a vehicle ventilation device according to the present invention.

FIG. 11 is a partial end view showing still another embodiment of the horn of the apparatus for manufacturing a vehicle ventilation device according to the present invention.

FIG. 12 is a partial end view showing still another embodiment of the horn of the apparatus for manufacturing a vehicle ventilation device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drafter as a ventilation device for vehicles 11 Drafter body as a ventilation device main body 12 Valve 17 Frame part 18 Ventilation opening 21 Mounting surface 25 Fixed part 26 Valve main body 31 Vibration welding part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-324228 (JP, A) JP-A-9-66731 (JP, A) JP-A-9-57853 (JP, A) 40223 (JP, U) JP-A 4-133910 (JP, U) JP-A 4-71307 (JP, U) JP-A 61-73502 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B60H 1/26 B29C 65/08 B29L 31:30

Claims (4)

(57) [Claims] An exchange having a resin frame portion provided with a ventilation opening.
Pneumatic device main body, a valve main body that opens and closes one side of the ventilation port and
A fixed portion fixed along one side of the frame portion is integrally provided.
A resin valve, wherein the fixed portion is a vibration-welded portion that is vibration-welded to the frame portion.
The vibration welding portions plurality comprising at predetermined intervals along the longitudinal direction of the fixing portion, a direction inclined with respect to the longitudinal direction of the fixing portion and the longitudinal direction, characterized by being substantially parallel to each other car two-way ventilation system. To the longitudinal direction of the 2. A fixing unit, the longitudinal direction of the vibration welding unit for a vehicle ventilation system according to claim 1, wherein the angle of 30 degrees to 60 degrees. 3. The vibration welded portion has a width in a direction perpendicular to the longitudinal direction of the vibration welded portion of 0.5 mm or more and 1.0 mm or less, and extends in a direction perpendicular to the longitudinal direction of the vibration welded portion. 3. The vehicle ventilator according to claim 2 , wherein the distance between the two is formed to be 1.0 mm or more and 1.5 mm or less. 4. The valve has a sheet shape having an urging force in a direction in which the fixing portion and the valve body are positioned flush with each other, and a surface of one side of the frame portion to which the fixing portion is fixed has a ventilation port. Angle with respect to the surface with which the valve body abuts,
The vehicle ventilating device according to any one of claims 1 to 3, wherein a mounting surface portion having an angle greater than 0 degrees and equal to or less than 135 degrees is formed.