JP4378588B2 - Air guide duct - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air guide duct, and more specifically, a first half having a required rigidity and constituting one duct half and a second half formed from a resin sheet material and constituting the other duct half. The present invention relates to an air guide duct in which a half body is attached to form a duct body, and an air outlet into which an air outlet is inserted and connected is opened at a required position of the second half.
[0002]
[Prior art]
For example, large vehicle interior members such as an instrument panel, a floor console, and a roof panel are mounted in a passenger compartment in a vehicle such as a passenger car. These vehicle interior members are provided with air outlets at the required positions, and the temperature control air sent from the air conditioner unit mounted in front of the passenger compartment is blown out from the air outlet to the passenger compartment, The temperature of the entire room is adjusted. That is, an air guide duct is provided on the back side of the vehicle interior member so as to connect the air conditioner unit and the air outlet. Temperature-controlled air from the air conditioner unit is sent to the corresponding air outlet via the air guide duct. Distribution guidance. The air guide duct is mainly formed by blow molding of a hollow parison made of high-density polyethylene or the like, but in recent years, for example, as shown in FIG. A guide duct 10 is also implemented.
[0003]
The air guide duct 10 shown in FIG. 6 is installed, for example, inside the instrument panel 20, and has a first half body 12 having a required rigidity and constituting one duct half body, and a foamed resin sheet. A second half 14 that is vacuum-formed from the material and constitutes the other duct half. The first half 12 and the second half 14 are joined in the longitudinal direction to form a duct body 16. ing. Since such an air guide duct 10 has an area of more than half (about three quarters) of the outer wall surface of the duct main body 16 as a foamed resin sheet material, compared with a conventional air guide duct made of high-density polyethylene. This has the advantage of improving sound absorption characteristics, heat insulation characteristics, vibration isolation characteristics, and the like.
[0004]
[Problems to be solved by the invention]
When the air guide duct 10 and the air outlet 24 are installed and fixed inside the instrument panel 20, the air outlet 24 is inserted into the mounting opening 22 opened in the panel 20 from the outside. Then, the cylindrical body portion 26 of the air outlet 24 is connected to the corresponding air outlet 18 by being inserted and connected thereto. However, since the air outlet 18 has a low rigidity (because it is formed from a foamed resin sheet material), the air outlet 24 is open on the front side wall surface 14a of the second half body 14, and therefore the air outlet 24 with respect to the air outlet 18 is provided. There was a problem that the insertion and connection of was not made properly. That is, the inner shape and dimensions of the air outlet 18 are set to be the same as the outer shape and dimensions of the cylindrical portion 26 in order to achieve a tight joint between the air outlet 18 and the cylindrical portion 26. Then, as shown in FIG. 7, when the air outlet 24 is not inserted in an appropriate posture with respect to the mounting opening 22 (for example, when inserted obliquely), a rear end 26a of the cylindrical body portion 26 is obtained. Will interfere with the front side wall surface 14 a of the second half 14. For this reason, the peripheral part of the edge of the air outlet 18 is pushed and the second half 14 is deformed, and proper and reliable communication connection between the duct body 16 and the air outlet 24 is not guaranteed.
[0005]
Further, if the inner dimension of the air outlet 18 is appropriately set larger than the outer dimension of the cylindrical part 26, the above-described inconvenience can be avoided, but the gap between the air outlet 18 and the cylindrical part 26 can be avoided. In addition, a gap that causes air leakage is formed. Accordingly, as shown in FIG. 8, a flexible urethane packing member 28 is separately attached along the inner peripheral edge of the air outlet 18 to prevent air leakage from the gap. There is a problem that the cost increases due to an increase in material cost, production cost, mounting work process, and the like of the packing member 28.
[0006]
OBJECT OF THE INVENTION
The present invention has been proposed to suitably solve the above-described problems, and supports the peripheral portion of the edge of the air circulation port formed in the second half from the inside on the first half having the required rigidity. A frame-shaped support member is formed upright to restrict deformation of the second half when the air outlet is connected, and a part of the second half is interposed between the frame-shaped support member and the air outlet. It is an object of the present invention to provide an air guide duct that is configured such that both members are closely joined together.
[0007]
[Means for Solving the Problems]
To solve the above problems, the present invention in order to achieve the intended purpose, a first half that having a stiffness, a second and a half by adhering the duct body molded from a resin sheet material In the air guide duct in which the air outlet into which the air outlet is inserted and connected is opened in the second half body,
Wherein the extraordinary useless erected into the duct body, said frame-shaped abuts while the air outlet in the front wall inwardly defining the second half the air outlet surrounding the inner support to said first half and the member,
The frame-shaped support member that surrounds the air outlet from the inside is overhanging to the fitting port into which the air outlet is inserted, and is provided on the front side wall surface of the second half body, and the frame-shaped support from the insertion side of the air outlet A skirt piece covering the member,
The pre-Symbol edge periphery of the air outlet of the air outlets is inserted, characterized by being configured to support at the frame-like support member.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the air guide duct according to the present invention will be described below with reference to the accompanying drawings. In the embodiment, a case where the conventional air guide duct 10 shown in FIG. 6 is improved will be described, and the same members as those of the duct 10 are denoted by the same reference numerals. As shown in FIG. 3, the air guide duct 10 according to the present embodiment includes a plate-like first half 12 formed as a duct half and a second half formed as a reverse half as a duct half. 14, and the duct body 16 is formed by joining the first half body 12 and the second half body 14 in the longitudinal direction.
[0009]
(First half)
The first half 12 constitutes a lower wall surface of the air guide duct 10, and is formed by injection molding a resin material made of, for example, polyethylene or polypropylene, thereby forming a duct wall 30 that forms the duct body 16 and A flange 32 integrally molded around the duct wall 30 is integrally molded to a required thickness. A frame-like support member 42 that supports the outer periphery of the edge of the air outlet 18 from the inside is integrally formed at a portion corresponding to each air outlet 18 opened in the second half 14. ing. In addition, an air inflow port 34 that is aligned with an air outlet of the air conditioner unit 36 is opened at a substantially right and left center of the duct wall portion 30. Such a first half 12 has sufficient rigidity to maintain its shape.
[0010]
(Second half)
The second half 14 constitutes the upper wall surface and the front and rear wall surfaces of the air guide duct 10, and is formed by vacuum forming a foamed resin sheet material having a required thickness made of, for example, foamed polyethylene or foamed polypropylene. The duct wall 38 forming the duct body 16 and the flange 40 integrally molded around the duct wall 38 are integrally molded to a required thickness. Further, at the left and right both end portions and the center portion of the front wall surface of the duct wall portion 38, a total of four rectangles in which the air outlets 24 installed in the mounting ports 22 of the instrument panel 20 are correspondingly inserted and connected. A shaped air outlet 18 is opened. Since the second half 14 made of such a foamed resin sheet material does not have sufficient rigidity, it is easily deformed when a force is applied from the outside. The characteristics, anti-vibration characteristics, etc. are improved.
[0011]
The first half 12 and the second half 14 formed as described above are joined to each other using the flange 32 of the first half 12 and the flange 40 of the second half 14, The duct body 16 is formed by the duct wall portions 30 and 38. The flanges 32 and 40 are, for example, adhesive bonding, adhesive bonding with double-sided tape, vibration welding (fusion), thermal welding (fusion) using a hot plate, ultrasonic welding (fusion), and the like. By using the method, they are preferably joined together.
[0012]
(Frame-shaped support member)
Each frame-like support member 42 erected on the duct wall portion 30 of the first half 12 is provided with each air flow established in the second half 14 as shown in FIGS. 3 and 4. It is provided corresponding to the outlet 18 and is integrally formed into a rectangular frame shape that is slightly larger than the air outlet 18 by the upper and lower and left and right frame rods 42a. As shown in FIG. 2, the frame-like support member 42 faces the duct body 16 when the first half 12 is attached to the second half 14, and the front side of the second half 14. The air outlet 18 is surrounded from the inner side while abutting the inner surface of the wall surface 14 a, and the periphery of the edge of the air outlet 18 is supported from the inner side of the duct body 16. Thereby, for example, when the peripheral part of the air outlet 18 is pressed from the outside, the frame-like support member 42 supports the front side wall surface 14a of the second half 14 from the inside, so that the second half 14 The deformation is preferably regulated.
[0013]
(Hem piece)
In addition, the front side wall surface 14a of the second half body 14 that defines the air outlet 18 is visually recognized from the insertion side of the air outlet 24 by the frame-shaped support member 42 that surrounds the air outlet 18 from the inside. A skirt-like piece 46 overhanging the fitting port 44 of the frame-like support member 42 is provided to such an extent that it cannot be obtained. As shown in FIG. 2, the skirt-like piece 46 is formed so as to be inclined from the front side wall surface 14 a to the inside of the duct body 16.
[0014]
(Air outlet insertion connection)
The air outlet 24 has the air guide duct 10 configured as described above installed and fixed on the back side of the instrument panel 20, as shown in FIG. 2, from the outside to the mounting opening 22 of the instrument panel 20. By inserting, the cylindrical body portion 26 is inserted and connected into the air outlet 18 and the fitting port 44 of the frame-like support member 42. Here, the outer dimension of the cylindrical body portion 26 in the air outlet 24 is set to be smaller than the fitting port 44 of the frame-like support member 42 by an amount corresponding to the thickness of the skirt-like piece 46. Are fitted loosely with an interval corresponding to the thickness of the skirt piece 46 (the equivalent is slightly smaller).
[0015]
(Pinch the hem piece)
Therefore, in the air guide duct 10 of the embodiment, by sandwiching the skirt piece 46 in the gap formed between the frame flange 42a of the frame-shaped support member 42 and the cylindrical body portion 26 of the air outlet 24, The skirt piece 46 functions in the same manner as the packing member 28 shown in FIG. That is, when the air outlet 24 and the air outlet 18 are connected, when the air outlet 24 is inserted to the position of the two-dot chain line in FIG. To come into contact. Then, in the process of inserting the air outlet 24 to a predetermined position from this state, the skirt piece 46 is pushed and bent toward the inner side of the duct body 16, and when the air outlet 24 is completely set in the mounting opening 22. When the cylindrical portion 26 is fitted into the fitting port 44 of the frame-shaped support member 42, the skirt-shaped piece 46 is sandwiched between each frame collar 42 a of the frame-shaped support member 42 and the outer surface of the cylindrical portion 26. The air outlet 24 and the duct body 16 are joined in close contact.
[0016]
As described above, in the air guide duct 10 of the embodiment, the frame-shaped support member 42 in which the outer peripheral portion of the edge of the air outlet 18 in the second half 14 is formed in the first half 12 inside the duct body 16. Since the air outlet 24 is connected while being supported by the respective frame rods 42a, the deformation of the second half body 14 is suitably restricted so that the air outlet 24 and the duct body 16 are properly connected. And surely done. Further, when the air outlet 24 is inserted and connected, when the cylindrical body portion 26 is fitted into the fitting port 44 in order to insert the air outlet 24 into the air outlet 18, the air outlet 24 is interposed between the members 24 (26) and 44. Since the skirt-like piece 46 is sandwiched and the skirt-like piece 46 functions as a packing member, the packing member 28 which has been conventionally required is not necessary, and the cost can be reduced due to the reduction in the number of parts.
[0017]
[Another form example]
FIG. 5 shows an air guide duct 10 according to another embodiment. The cross section of a duct body 16 formed by attaching the first half 12 to the second half 14 is substantially the same as the air outlet. 24 is set to be substantially the same as the cross-sectional shape of the cylindrical portion 26 in FIG. That is, the open end side of the first half 12 facing the air outlet 18 is formed as an inclined portion 48 that widens outwardly downward from the center line of the duct body 16, and the air outlet 18 The open end side of the second half 14 facing the center is formed as an inclined portion 50 that expands outward in a forwardly rising manner with respect to the center line of the duct body 16. Further, contact step surfaces 48 a and 50 a are formed on the base side of the inclined portions 48 and 50 in the respective half bodies 12 and 14, and the rear end 26 a of the cylindrical portion 26 in the air outlet 24 inserted into the air outlet 18. Are in contact with each other. Thereby, when the air outlet 24 is inserted and connected to the duct body 16, the duct wall portions 30 and 38 forming the duct body 16 and the cylindrical portion 26 of the air outlet 24 are in close communication with each other. The ventilation path extending from the duct body 16 to the air outlet 24 continuously extends, and reduction of ventilation resistance, wind noise, and the like can be expected.
[0018]
【The invention's effect】
As described above, according to the air guide duct according to the present invention, the outer peripheral portion of the edge of the air outlet formed in the second half body that is molded from the resin sheet material and has low rigidity is rigid inside the duct body. Since the air outlet is connected with the frame-shaped support member formed upright on the first half body having the air outlet, the deformation of the second half body is suitably restricted, and the air outlet and There exists an advantage by which a connection with a duct main body is made appropriately and reliably. Further, when inserting and connecting the air outlet, a skirt-like piece formed on the second half and covering the frame-like support member from the insertion side is sandwiched between the frame-like support member and the cylindrical portion, and the duct body and the air outlet are closely attached. Therefore, there is an advantage that the cost can be reduced by eliminating the need for the packing member which has been conventionally required. If the cross-sectional shape of the duct body is set to be substantially the same as the cross-sectional shape of the air outlet, the ventilation path from the duct body to the air outlet will continuously extend, reducing ventilation resistance and wind noise. Etc. can be expected.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an air guide duct of the present embodiment in a state where an air outlet is connected.
2 is a cross-sectional view showing a state immediately before an air outlet is connected to the air guide duct of FIG. 1;
FIG. 3 is an exploded perspective view of an air guide duct in which a first half and a second half are separated.
4 is an enlarged perspective view showing a portion A in FIG. 3;
FIG. 5 is a cross-sectional view showing another embodiment of the air guide duct in a state where an air outlet is connected.
FIG. 6 is a perspective view of an air guide duct shown in a state where an air outlet is connected to an air outlet.
FIG. 7 is a cross-sectional view showing a conventional problem that an air outlet cannot be properly joined to an air guide duct.
FIG. 8 is a cross-sectional view of a joining form using a packing member for tightly joining an air guide duct and an air outlet in the case of FIG. 7;
[Explanation of symbols]
10 air guide duct 12 first half 14 second half
14a Front side wall surface 16 Duct body 18 Air outlet 24 Air outlet
26a Rear end 42 Frame-shaped support member 44 Fitting port 46 Bottom piece 48,50 Inclined portion
48a, 50a Contact step surface

Claims (3)

A first half that having a stiffness (12), the second and half (14) molded from a resin sheet to form a duct body (16) by adhering an air outlet (24) In the air guide duct (10) in which the air outlet (18) to be inserted and connected is opened in the second half (14 ) ,
Wherein the extraordinary useless erected to the duct body (16) in the first half (12), said air outlet (18) front wall (14a) inwardly defining the said second half (14) abuts with frame-like support member which surrounds said air outlet (18) from the inside (42),
The second half (14) is overhanged by overhanging the fitting outlet (44) into which the air outlet (24) of the frame-like support member (42) surrounding the air outlet (18) is inserted from the inside. A skirt-like piece (46) provided on the front wall surface (14a) and covering the frame-like support member (42) from the insertion side of the air outlet (24);
An edge peripheral portion of the front Symbol air outlet the air flow outlet (24) is inserted (18), the air guide duct, characterized by being configured to support at the frame-like support member (42). The outer dimension of the air outlet (24) is set to be smaller by an amount corresponding to the thickness of the skirt piece (46) than the fitting port (44) of the frame-shaped support member (42),
It said fitting opening inserted air outlet (24) and the frame-like support member (42) in claim 1 Symbol placement air guide duct of the skirt-like piece into the gap (44) is configured to be sandwiched in the (44). Prior Symbol open end of the air outlet port first half facing the (18) (12) and a second half (14), inclined portion diverging outwardly relative to the center line of the duct body (16) ( 48,50) is formed,
A contact step surface (48a, 50a) with which a rear end (26a) of the air outlet (24) inserted into the duct body (16) abuts is formed at the base of the inclined portion (48 , 50). Item 3. The air guide duct according to Item 1 or 2 .

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