JP2017226255A - Vent duct and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a manufacturing of a vent duct.SOLUTION: A vent duct 10 includes: a duct body 12 provided with a ventilation passage 14; an opening/closing valve 16 attached to the duct body 12 and designed to open and close the ventilation passage 14; and a seal part 28 disposed at a flange 26 of the duct body 12. The opening/closing valve 16 is held by a holding part 34. The holding part is designed to pass a mounting hole formed on the opening/closing valve 16 through a hooking part disposed on the duct body 12, and is integrally formed so as to be connected via a connection part 36 to the seal part 28. The holding part is joined to the hooking part being passed through the mounting hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vent duct that opens and closes an air passage using an on-off valve, and a method for manufacturing the vent duct.

  A vehicle such as an automobile is provided with a duct called a quarter vent duct as an exhaust port for ventilating air in the passenger compartment (see, for example, Patent Document 1). The quarter vent duct includes a cylindrical duct body having an air passage, and an on-off valve that is formed of a flexible material such as rubber and can open and close the air passage. The quarter vent duct fits the duct body into the hole formed in the vehicle body and presses the seal part provided on the flange part of the duct body against the vehicle body so as to seal between the vehicle body by the seal part. It has become. The on-off valve is joined to the upper wall part that defines the upper side of the air passage in the duct body and hangs down from the air passage, and only opens outward from the closed position that closes the air passage due to the difference in atmospheric pressure inside and outside the vehicle. It has become. The quarter vent duct allows the air to be discharged from the passenger compartment by opening the on-off valve to the outside of the vehicle. On the other hand, the quarter vent duct allows dust and water to enter the passenger compartment from the outside of the vehicle by the on-off valve that is closed by its own weight. It prevents entry into the side.

  In the quarter vent duct, the duct main body and the on-off valve are respectively formed by separate molding dies, and a hole formed on the on-off valve is fitted into a protrusion formed on the duct main body (see Patent Document 1). The opening / closing valve is attached to the duct main body by fitting the attachment piece formed on the opening / closing valve into the attachment hole formed in, or joining them by heat caulking or ultrasonic welding.

Japanese Patent Laying-Open No. 2015-182598

  The duct body is required to have rigidity capable of holding the shape, whereas the seal portion is required to be flexible so as to be elastically applied to the vehicle body. Therefore, the duct body and the seal portion are separately provided. It is common to form. That is, in order to obtain a quarter vent duct, a process of forming the duct body, a process of providing a seal portion on the duct body, and a process of attaching an on-off valve to the duct body so as not to come off are performed. Takes time.

  That is, the present invention has been proposed in view of the above-described problems related to the prior art, and provides a vent duct and a method for manufacturing the vent duct that can be easily manufactured. With the goal.

In order to overcome the above-mentioned problems and achieve the intended purpose, the vent duct of the invention according to claim 1 of the present application,
A duct body provided with a ventilation path;
An on-off valve attached to the duct body for opening and closing the vent passage;
A seal portion provided on a flange portion formed to extend outward in the duct body;
A latching portion provided in the duct main body so as to face the air passage, and inserted into a mounting hole provided in the on-off valve,
The duct body is integrally formed with the seal portion through a connecting portion provided from the flange portion to the latching portion, and is joined to the latching portion that is passed through the mounting hole to hold the on-off valve. The gist of the present invention is that it has a holding part.
According to the first aspect of the present invention, since the holding portion that holds the on-off valve is connected by the connecting portion and integrated with the seal portion, the holding portion and the seal portion can be molded together. That is, since the process for fixing the on-off valve and the formation of the seal portion can be performed together, the manufacture of the vent duct can be simplified.

The invention according to claim 2 is characterized in that a plurality of the latching portions are provided apart from each other, and the holding portions formed corresponding to the individual latching portions are provided apart from each other. To do.
According to the second aspect of the invention, since the plurality of holding portions are provided so as to be separated from each other, the influence on the on-off valve due to the deformation of the holding portion can be suppressed.

In the invention which concerns on Claim 3, it is provided in the said duct main body so that the said air flow path may be faced, The positioning part which positions this on-off valve with respect to a duct main body through the positioning hole provided in the said on-off valve is provided. This is the summary.
According to the third aspect of the present invention, since the on-off valve is positioned with respect to the duct main body by the positioning portion that is passed through the positioning hole, the air passage can be appropriately closed in the closing posture of the on-off valve.

In the invention which concerns on Claim 4, it is provided in the above-mentioned duct main part, It is provided with the latching part which can be hooked on the opening edge of the opening provided in the vehicle body,
The gist of the invention is that the connecting portion is provided so as to extend to the rear side in the insertion direction when the duct body is inserted into the opening of the vehicle body with respect to the locking portion.
According to the invention which concerns on Claim 4, since a connection part becomes a mark of the position of a latching | locking part when inserting a duct main body into opening of a vehicle body, it is easy to attach a duct main body to a vehicle body.

In order to overcome the above-mentioned problems and achieve the intended purpose, a method for manufacturing a vent duct according to claim 5 of the present application is as follows.
Molding the duct body with a ventilation path,
Through the mounting hole formed in the on-off valve formed separately from the duct main body, the on-off valve is installed in the duct main body in the latching portion formed to face the air passage in the duct main body,
A raw material is injected through a filling portion provided in the duct body from a flange portion formed so as to extend outward to the duct body, and a seal portion provided in the flange portion; The gist is that a holding portion that holds the on-off valve by joining to a latching portion that passes through the mounting hole is integrally formed.
According to the invention which concerns on Claim 5, since a raw material is inject | poured through a filling part and a seal part and a holding | maintenance part are integrally molded, a manufacturing process can be reduced and manufacture of a vent duct can be simplified. .

The invention according to claim 6 is summarized in that the duct main body, the seal portion, and the holding portion are formed by separate molds.
According to the invention which concerns on Claim 6, an on-off valve can be attached to a duct main body accurately, without receiving the influence of the deformation | transformation resulting from the shaping | molding shrinkage | contraction of a duct main body.

The gist of the invention according to claim 7 is that a plurality of the latching portions are provided apart from each other, and the holding portions formed corresponding to the individual latching portions are formed so as to be separated from each other.
According to the invention which concerns on Claim 7, since the some holding | maintenance part is mutually spaced apart, the influence on the on-off valve by the shaping | molding shrinkage | contraction of a holding | maintenance part can be suppressed.

In the invention according to claim 8, when the on-off valve is installed in the duct main body, the on-off valve is connected to the duct main body through a positioning hole formed in the on-off valve through a positioning portion formed in the duct main body. The gist of this is the positioning.
According to the eighth aspect of the present invention, since the on-off valve is positioned with respect to the duct body by the positioning portion that has passed through the positioning hole, it is possible to prevent the on-off valve from being displaced when the holding portion is molded. The on-off valve can be accurately attached to the duct body.

  According to the vent duct of the present invention, manufacturing can be simplified. According to the vent duct manufacturing method of the present invention, the vent duct can be easily manufactured.

1 is a schematic perspective view showing a vent duct according to a preferred embodiment of the present invention. It is a front view which shows the vent duct of an Example. It is a rear view which shows the vent duct of an Example. (a) is a side view which shows the vent duct of an Example, (b) is the sectional view on the AA line of FIG. (a) is the BB sectional drawing of FIG. 2, (b) is CC sectional view taken on the line of FIG. It is a front view which shows the duct main body of an Example. It is explanatory drawing which shows the manufacturing process of the vent duct of an Example, (a) shows the attachment condition of an on-off valve, (b) shows the condition which shape | molds a seal part and a holding part with a shaping | molding die. It is explanatory drawing which shows the attachment to the vehicle body of the vent duct of an Example.

  Next, the vent duct and the method for manufacturing the vent duct according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. In the embodiment, a quarter vent duct which is installed in a vehicle such as an automobile and serves as an exhaust port for air exhausted from the vehicle interior to the outside through a gap around the side trim is illustrated.

  As shown in FIG. 1, the vent duct 10 according to the embodiment opens and closes the air duct 14 and the duct body 12 provided with an air passage 14 through which air can flow through the outside of the vehicle and the passenger compartment of the vehicle. And an on-off valve 16. The vent duct 10 is installed, for example, inside the rear bumper so that the air passage 14 opens horizontally. In the vent duct 10, an on-off valve 16 whose upper edge is fixed to the duct body 12 is suspended from the air passage 14, and the on-off valve 16 having flexibility is inward and ventilated toward the vehicle compartment side of the air passage 14. The road 14 is configured to be openable and closable outwardly toward the vehicle exterior. Here, the on-off valve 16 is in a closed position in which the inward displacement due to its own weight is regulated by the duct body 12 and closes the air passage 14, and opens the air passage 14 by being displaced outward from the closed position. It is configured as follows.

  The vent duct 10 closes the air passage 14 by an open / close valve 16 that is closed by its own weight, and prevents foreign matters such as dust and water from entering from the outside of the vehicle. In addition, the vent duct 10 allows the air to flow from the vehicle interior to the vehicle exterior by opening the on-off valve 16 outward due to a pressure difference outside the vehicle interior such as when the door is closed. In the following description, the side of the vent duct 10 that leads to the vehicle outer side in the ventilation path 14 is referred to as a front side, and the side that leads to the passenger compartment side in the ventilation path 14 is referred to as a rear side. The horizontal direction perpendicular to the opening / closing direction of the opening / closing valve 16 that swings back and forth is the lateral direction of the bend duct 10.

  The duct body 12 is a hard resin molded product made of a thermoplastic resin such as polypropylene (PP), and in the embodiment shown in FIGS. 1 to 3, the duct body 12 has a cylindrical shape having a horizontally elongated opening. Is formed. The duct body 12 has an upper wall portion 18 that defines the upper side of the air passage 14, an upper wall portion 18 that faces the upper wall portion 18 across the air passage 14, and a lower wall portion 20 that defines the lower side of the air passage 14. The outer wall is configured by a pair of lateral wall portions 22 and 22 that face each other with the air passage 14 sandwiched between the left and right sides and that define the lateral side of the air passage 14. The duct body 12 has front ends that define a front opening of the air passage 14 in the upper and lower and left and right wall portions 18, 20, 22, and 22 aligned at the same position in the front-rear direction. Further, the rear end of the upper wall portion 18 is located slightly behind the rear end of the lower wall portion 20, and the rear ends of the upper and lower wall portions 18, 20 are aligned in the lateral direction. . Further, the left and right lateral wall portions 22, 22 are inclined toward the front side as the rear ends are directed from the upper wall portion 18 toward the lower wall portion 20. The duct body 12 is formed with a plurality of plate-shaped partition wall portions 24 that extend between the upper wall portion 18 and the lower wall portion 20 and divide the air passage 14 into the left and right sides and are separated in the lateral direction. . The partition wall portion 24 is formed such that the rear end connects the rear end of the upper wall portion 18 to the rear end of the lower wall portion 20, and the front end is inclined from the rear end of the upper wall portion 18 toward the front end of the lower wall portion 20. (See FIGS. 4B and 5). That is, the partition wall portion 24 is inclined so that the front end is displaced to the front side from the top to the bottom.

  The duct body 12 includes a receiving surface 18 a of the upper wall portion 18, a receiving surface 22 a of the lateral wall portion 22, a receiving surface 24 a of the front end of the partition wall portion 24, and a receiving surface 20 a of the lower wall portion 20. A receiving surface of the on-off valve 16 is formed that inclines forward as it goes to the side (see FIG. 6). The duct body 12 supports the open / close valve 16 in a closed posture that inclines forward as it goes from top to bottom by the receiving surfaces 18a, 20a, 22a, and 24a, and swings backward after exceeding the closed posture. It is regulated.

  As shown in FIGS. 1 to 5, the duct body 12 has a plate-like shape that extends from the front ends of the wall portions 18, 20, 22, and 22 that form the outline of the duct body 12 to the side opposite to the air passage 14. The flange portion 26 is formed over the entire circumference. The flange portion 26 is formed to extend outward from the wall portions 18, 20, and 22 that define the air passage 14. The vent duct 10 has walls 18, 20, 22, and 22 that form an outline of the duct body 12 inserted into a mounting opening (opening) Sa opened in the vehicle body S (see FIG. 8), and the flange portion 26 has an opening. It is attached to the vehicle body S in a state of being superimposed on the opening edge. The flange portion 26 is provided with a seal portion 28 on the rear surface facing the vehicle body S when the vent duct 10 is attached to the vehicle body S. The seal portion 28 is made of an elastically deformable material such as an elastomer such as an olefin elastomer (TPO) or a styrene elastomer, or a rubber material such as ethylene-propylene-diene rubber. The seal portion 28 is formed such that a contact portion to the vehicle body S extends from the joint portion joined to the rear surface of the flange portion 26 in a tongue-like shape, and the contact portion has flexibility. The seal portion 28 extends over the entire circumference of the flange portion 26 and is disposed so as to surround the entire circumference of the duct body 12. When the vent duct 10 is attached to the vehicle body S, the seal portion 28 is elastically brought into contact with the opening edge of the attachment opening Sa to seal between the flange portion 26 and the vehicle body S. (See FIG. 8B).

  As shown in FIGS. 3 to 5, the upper wall portion 18 and the lower wall portion 20 are provided with locking portions 30 for attaching the vent duct 10 to the vehicle body S. A plurality of locking portions 30 are provided in the upper wall portion 18 and the lower wall portion 20 so as to be spaced apart from each other in the lateral direction. In the embodiment, two locking portions 30 are spaced apart from each other in the left-right direction. The locking portion 30 has a hook shape that protrudes from the outer surface of the wall portions 18 and 20 to the opposite side of the air passage 14 and then bends forward. When the vent duct 10 is attached to the vehicle body S, the opening edge of the attachment opening Sa (See FIG. 8B). The vent duct 10 of the embodiment is hooked on the lower opening edge of the mounting opening Sa of the vehicle body S from the lower locking portion 30 provided on the lower wall portion 20 with the duct body 12 being inclined (see FIG. FIG. 8 (a)). Then, by pressing the upper flange portion 26 with the lower locking portion 30 as a fulcrum, the upper locking portion 30 is pushed into the mounting opening Sa, and the upper locking portion 30 is moved to the upper opening edge of the mounting opening Sa. The vent duct 10 is attached to the vehicle body S by hooking.

  The on-off valve 16 is a thin plate-like body and is made of an elastically deformable material such as an elastomer such as an olefin elastomer (TPO) or a styrene elastomer, or a rubber material such as ethylene-propylene-diene rubber. . The on-off valve 16 is formed slightly larger than the opening surface of the air passage 14 surrounded by the upper wall portion 18, the lateral wall portions 22, 22 and the lower wall portion 20. The on-off valve 16 has an upper edge attached to the upper wall portion 18 of the duct body 12, and its own weight acts on the on-off valve 16 suspended from the upper wall portion 18 toward the closed position. The on-off valve 16 closes the air passage 14 in a closed posture overlapping the receiving surfaces 18a, 20a, 22a, 24a of the duct body 12, and in this closed posture, the receiving surfaces 18a, 20a, 22a, 24a are inclined from above to below. It is supported in a state of tilting forward as it goes to (Fig. 4 (b) and Fig. 5).

  Next, a structure for attaching the on-off valve 16 to the duct body 12 will be specifically described. As shown in FIG. 4B, the vent duct 10 is provided in the duct body 12 so as to face the air passage 14, and is a latching portion that is inserted into an attachment hole 16 a provided in the upper edge portion of the on-off valve 16. 32 and a holding portion 34 that holds the on-off valve 16 by being joined to the latching portion 32 that is passed through the mounting hole 16a. Here, in the vent duct 10, the seal portion 28 and the holding portion 34 are integrally formed from the flange portion 26 to the latching portion 32 via the connection portion 36 provided in the duct body 12. That is, the holding portion 34 and the connecting portion 36 are formed as a single continuous portion with the same material as the seal portion 28 and are formed with a material different from that of the duct body 12. And the holding | maintenance part 34 and the connection part 36 of an Example have elasticity.

  As shown in FIGS. 4B and 6, the latching portion 32 protrudes forward from the front surface of the latching base portion 33 formed so as to extend from the upper wall portion 18 toward the inside of the air passage 14. In this embodiment, the projection protrudes at an angle orthogonal to the receiving surfaces 18a, 20a, 22a, and 24a. The latching portion 32 is formed to have a size that is the same as or larger than the thickness of the on-off valve 16, and in the embodiment, is set slightly larger than the thickness of the on-off valve 16, and slightly from the inserted mounting hole 16a. It protrudes forward. The mounting hole 16a is formed to be larger than the outer diameter of the hooking portion 32, and is set so that a gap is formed between the opening edge of the mounting hole 16a and the hooking portion 32. The latch base 33 is formed larger than the mounting hole 16a, and the on-off valve 16 attached to the duct body 12 is closed by the latch base 33 located on the rear side of the mounting hole 16a. . A plurality of the latching portions 32 are provided in the upper part of the air passage 14 so as to be separated from each other in the lateral direction. In the embodiment, the latching portions 32 are biased to the left and right edge sides in the upper portion of the air passage 14, respectively. (See FIG. 6). The latching portion 32 and the latching base portion 33 are formed integrally with the duct body 12.

  As shown in FIG. 5 (a), the connecting portion 36 is a first connecting portion 36a formed so as to pass through a filling hole 38a penetrating back and forth in the flange portion 26 extending to the upper portion of the duct body 12. Is connected to a seal portion 28 provided on the rear surface of the flange portion 26. In addition, the connection portion 36 is provided continuously to the first connection portion 36a, and a second connection portion 36b that extends laterally on the front surface of the upper flange portion 26 and a branch wall from the second connection portion 36b. And a third connecting portion 36c extending toward the rear end of the upper wall portion 18 through the inner surface of the portion 18 facing the ventilation path 14 (see FIG. 1). The second connection portion 36b and the third connection portion 36c are fitted into a filling portion 38 (see FIG. 6) formed in a groove shape (example) or an opening shape in the upper flange portion 26 and the upper wall portion 18. It is provided and joined to the duct body 12. As described above, the duct body 12 is provided with the filling portion 38 from the upper flange portion 26 through the upper wall portion 18 to the latching portion 32, and the connection portion 36 is disposed in the filling portion 38.

  The filling hole 38a of the filling portion 38 is disposed at a position corresponding to the front side of the locking portion 30, and a connecting portion 36 having elasticity extends to a portion to be pushed when the upper locking portion 30 is hooked on the mounting opening Sa. Exist. In other words, the connection portion 36 is provided so as to extend to the rear side in the insertion direction when the duct body 12 is inserted into the attachment opening Sa of the vehicle body S with respect to the upper locking portion 30.

  As shown in FIG. 1 and FIG. 4B, the holding part 34 is provided corresponding to each of the latching parts 32, continuing to the rear end of the third connection part 36 c of the connection part 36. The holding portion 34 covers the front side of the latching portion 32 that has passed through the mounting hole 16a, and is provided so as to fill a gap between the latching portion 32 and the mounting hole 16a, and the on-off valve 16 and the latching portion 32 that are in contact with each other. It is joined. The holding portion 34 surrounds the latching portion 32 protruding from the attachment hole 16 a and is connected to the latching portion 32. Further, the holding portion 34 has an upper edge that fills a gap between the inner surface of the upper wall portion 18 and the upper edge of the on-off valve 16 and is in contact with the inner surface of the upper wall portion 18, and a lower edge that extends beyond the latching portion 32. It extends below the lower edge of the mounting hole 16a. Furthermore, it is preferable that the holding portion 34 is formed so that the lateral width is set larger than the lateral width of the mounting hole 16a and is about 1 mm larger than the lateral edge of the mounting hole 16a. In the vent duct 10, two holding portions 34, 34 are provided so as to be separated from each other corresponding to the two hooking portions 32, 32 that are separated in the lateral direction, and the adjacent holding portions 34, 34 are mutually connected. It is not connected and is formed with a minimum width that can hold the on-off valve 16. The holding portion 34 holds the upper edge portion of the on-off valve 16 with the on-off valve 16 interposed between the holding base portion 33 and allows the air passage 14 to be opened and closed by deformation of the on-off valve 16 itself.

  As shown in FIG. 1 and FIG. 5B, the vent duct 10 is connected to a positioning portion 40 provided in the duct body 12 so as to face the ventilation path 14, through a positioning hole 16 b formed in the opening / closing valve 16. Is attached to the duct body 12, the on-off valve 16 can be positioned with respect to the duct body 12. The positioning part 40 is a columnar projecting piece provided so as to protrude forward from the front surface of the positioning base part 41 formed so as to extend from the upper wall part 18 toward the inside of the air passage 14. In the example, it protrudes at an angle orthogonal to the receiving surfaces 18a, 20a, 22a, 24a. The positioning portion 40 is formed to have a size that protrudes larger than the thickness of the on-off valve 16. In the embodiment, the positioning portion 40 is set to be larger than the protruding size of the latching portion 32 so as to protrude forward from the inserted positioning hole 16 b. It has become. The positioning hole 16b is preferably set to be larger than the outer diameter of the positioning portion 40, and the opening size is set according to the outer diameter of the positioning portion 40 from the viewpoint of positioning with high accuracy. The positioning base 41 is formed larger than the positioning hole 16b, and the positioning hole 16b of the on-off valve 16 attached to the duct body 12 is closed by the positioning base 41 located on the rear side of the positioning hole 16b. As shown in FIG. 6, a plurality of positioning portions 40 are provided in the upper part of the air passage 14 so as to be spaced apart from each other in the lateral direction. Two positioning portions 40, 40 are provided. The positioning portion 40 and the positioning base portion 41 are formed integrally with the duct body 12.

  Next, a method for manufacturing the vent duct 10 according to the embodiment will be described. In the first mold, the duct body 12 is molded by injection molding or the like. At this time, each portion such as the latching portion 32 and the positioning portion 40 is simultaneously formed, and the filling portion 38 including the filling hole 38 a formed in the flange portion 26 is formed in the duct body 12. Further, the on-off valve 16 is formed separately from the duct body 12 by, for example, extruding it into a sheet shape by calendar molding, and formed into a predetermined shape by punching or the like. The mounting hole 16a and the positioning hole 16b are formed at the same time as molding or by post-processing after molding. After the duct main body 12 taken out from the first mold is cooled and the contraction is settled, it is set in the second mold 42 (FIG. 7B). By opening the positioning hole 16b from the front side through the positioning portion 40 of the duct body 12 set with the front side opened to the second mold 42 and passing the mounting hole 16a from the front side through the latching portion 32, the on-off valve 16 Is set in the duct body 12 (FIG. 7A).

  By closing the second molding die 42, a cavity 44 having a first space 44a corresponding to the seal portion 28 is defined. The second molding die 42 has a cavity 44 as a cavity 44 between the filling portion 38 and the mold surface of the second molding die 42, and a second space 44 b corresponding to the connection portion 36 is defined and opened and closed. A third space 44 c corresponding to the holding portion 34 is defined between the valve 16 and the mold surface of the second mold 42. In the cavity 44, the first space 44a, the second space 44b, and the third space 44c communicate with each other (FIG. 7B). By injecting the raw material into the cavity 44 from the injection portion 46 disposed at the position corresponding to the front side of the filling hole 38a in the second molding die 42, the filling hole 38a opened in the upper flange portion 26 is used. The first space 44a on the rear side of the flange portion 26 is filled with the raw material, and the seal portion 28 is formed. At the same time, the third space 44c is filled so as to cover the latching portion 32 facing the front side from the mounting hole 16a of the on-off valve 16 through the second space 44b defined by the filling portion 38. 36 and holding part 34 are molded together. As described above, since the raw material is filled into the third space 44c through the filling portion 38 in accordance with the molding of the seal portion 28, the holding of the on-off valve 16 by holding the on-off valve 16 and the latching portion 32 is held. The part 34 is integrally formed with the seal part 28 and the connection part 36.

(Effects of Example)
Next, the operation of the embodiment will be described. According to the vent duct 10 of the embodiment, the seal portion 28 provided in the flange portion 26 and the holding portion 34 that holds the on-off valve 16 are connected by the connection portion 36 and integrated with the same material. The holding part 34 and the seal part 28 can be molded together. That is, since the process for fixing the on-off valve 16 to the duct body 12 and the formation of the seal portion 28 can be performed together, the ultrasonic wave, heat, impulse, caulking, Unlike the configuration in which the on-off valve 16 is welded to the duct body 12 by, for example, the manufacture of the vent duct 10 can be simplified. Further, the vent duct 10 has the mounting hole 16a opened in the on-off valve 16 covered and closed by the holding portion 34, and the positioning hole 16b is closed by the positioning base portion 41. It is possible to prevent the exhaust gas of the vehicle from entering the passenger compartment from 16b. Also, the opening / closing valve 16 is different from a configuration in which, for example, a projection formed on the opening / closing valve 16 is inserted into a hole formed in the duct body 12, and the ventilation path is simply formed by opening the attachment hole 16a and the positioning hole 16b. 14 and a simple outer shape. Therefore, when the sheet is cut to obtain the on-off valve 16, waste loss can be reduced and the yield can be improved.

  In the vent duct 10, the holding portions 34 formed corresponding to the respective latching portions 32 are provided so as to be separated from each other, so that the influence on the on-off valve 16 due to the deformation of the holding portion 34 can be suppressed. Here, in the vent duct 10, the holding portion 34 may be made of an elastomeric material when the opening / closing valve 16 is made of an elastomeric material, and is held when the opening / closing valve 16 is made of a rubber material. The part 34 may also be made of a rubber-based material. Further, when the on-off valve 16 is made of a rubber material, the holding portion 34 may be made of an elastomer material. However, a combination in which the material constituting the holding portion 34 and the material constituting the duct main body 12 (the latching portion 32) are fused to each other when the holding portion 34 is molded is preferable. And since the vent duct 10 is positioned with respect to the duct main body 12 by the positioning part 40 in which the on-off valve 16 passed through the positioning hole 16b, the vent path 14 can be appropriately blocked in the closing posture of the on-off valve 16. .

  In the vent duct 10, the connecting portion 36 extends at a position corresponding to the locking portion 30. Therefore, when the duct body 12 is inserted into the mounting opening Sa of the vehicle body S, the connecting portion 36 is connected to the locking portion 30. Since it becomes a mark of a position, it is easy to attach the duct main body 12 to the vehicle body S. In addition, since the connecting portion 36 has elasticity like the seal portion 28, the burden on the operator can be reduced by pressing the connecting portion 36 when the duct body 12 is inserted into the mounting opening Sa. Can do.

  According to the manufacturing method described above, the first space 44 a for forming the seal portion 28 and the third space 44 c for forming the holding portion 34 are formed, and the second space 44 b defined by the filling portion 38 of the duct body 12 is formed. Therefore, the sealing portion 28 and the holding portion 34 can be molded together by injecting the raw material into the cavity 44. Thus, since the seal part 28 and the holding part 34 are integrally formed, the manufacturing process can be reduced and the manufacture of the vent duct 10 can be simplified. According to the manufacturing method, the upper wall portion 18 is passed through the means for joining the on-off valve 16 as in the configuration in which the on-off valve 16 is welded to the duct body 12 by ultrasonic waves, heat, impulse, caulking, or the like. There is no need to provide a space between the upper edge of the on-off valve 16. Therefore, it is possible to minimize the dimension of the overhanging portion that protrudes toward the inside of the air passage 14 provided at the rear end of the upper wall portion 18. And since the vent duct 10 obtained can secure a large opening area of the air passage 14, the ventilation resistance can be reduced, and the on-off valve 16 is appropriately opened when the air in the passenger compartment is released. Can do.

  According to the manufacturing method described above, the duct body 12, the seal portion 28, and the holding portion 34 are formed by separate molding dies, so that the duct body 12 can be opened and closed after the shrinkage of the duct body 12 is settled. The valve 16 is set, and the seal portion 28 and the holding portion 34 are integrally formed. For this reason, the on-off valve 16 can be accurately attached to the duct main body 12 without being affected by deformation caused by molding shrinkage of the duct main body 12.

  According to the manufacturing method described above, since the plurality of holding portions 34 are formed apart from each other, the influence on the on-off valve 16 due to molding shrinkage of the holding portion 34 can be suppressed. In this way, by providing a plurality of holding portions 34 and distributing the force related to holding the on-off valve 16 to the plurality of holding portions 34, and further minimizing the size of each holding portion 34, after molding, It is possible to prevent the opening / closing valve 16 from being wrinkled by being pulled by the contracting holding portion 34.

  According to the manufacturing method described above, when the holding portion 34 is formed, the on-off valve 16 is positioned with respect to the duct body 12 by the positioning portion 40 that is passed through the positioning hole 16b. 16 can be prevented from being displaced. Therefore, the on-off valve 16 can be accurately attached to the duct body 12.

(Example of change)
For example, the present invention can be modified as follows.
(1) The duct body may be configured such that a partition wall portion is provided between the left and right lateral wall portions and / or between the partition wall portions, and the ventilation path is vertically divided. In this case, the upper edge of the on-off valve may be attached to the rear edge of the partition wall that defines the upper side of the lower air passage. Thus, it can employ | adopt also in the structure which plugs each of the ventilation path divided up and down with the some on-off valve arrange | positioned up and down.
(2) The vent duct may be configured to block the ventilation path by a plurality of on-off valves arranged side by side on the left and right.
(3) The positions and number of the holding portions (holding portions) and the positioning portions are not limited to the configuration of the embodiment. However, it is desirable to provide holding portions on both edges of the on-off valve because the edges are difficult to turn up.

12 duct body, 14 air passage, 16 on-off valve, 16a mounting hole, 16b positioning hole,
26 Flange part, 28 Seal part, 30 Locking part, 32 Latch part, 34 Holding part,
36 connection part, 38 filling part, 40 positioning part, S vehicle body, Sa mounting opening (opening)

Claims (8)

A duct body provided with a ventilation path;
An on-off valve attached to the duct body for opening and closing the vent passage;
A seal portion provided on a flange portion formed to extend outward in the duct body;
A latching portion provided in the duct main body so as to face the air passage, and inserted into a mounting hole provided in the on-off valve,
The duct body is integrally formed with the seal portion through a connecting portion provided from the flange portion to the latching portion, and is joined to the latching portion that is passed through the mounting hole to hold the on-off valve. A vent duct comprising: a holding portion that performs   The vent duct according to claim 1, wherein a plurality of the latching portions are provided apart from each other, and the holding portions formed corresponding to the individual latching portions are provided apart from each other.   3. The positioning device according to claim 1, further comprising a positioning portion that is provided in the duct body so as to face the ventilation path, and that positions the opening / closing valve with respect to the duct body through a positioning hole provided in the opening / closing valve. Vent duct. Provided in the duct body, provided with a locking portion that can be hooked to the opening edge of the opening provided in the vehicle body,
The said connection part is provided in any one of Claims 1-3 provided so that it might extend in the insertion direction at the time of inserting the said duct main body into the opening of the said vehicle body with respect to the said latching | locking part. Vent duct as described. Molding the duct body with a ventilation path,
Through the mounting hole formed in the on-off valve formed separately from the duct main body, the on-off valve is installed in the duct main body in the latching portion formed to face the air passage in the duct main body,
A raw material is injected through a filling portion provided in the duct body from a flange portion formed so as to extend outward to the duct body, and a seal portion provided in the flange portion; A vent duct manufacturing method, wherein a holding portion that holds the on-off valve by joining to a latching portion that is passed through the mounting hole is integrally formed.   6. The method of manufacturing a vent duct according to claim 5, wherein the duct body, the seal part, and the holding part are formed by separate molding dies.   The method for manufacturing a vent duct according to claim 5 or 6, wherein a plurality of the latching portions are provided apart from each other, and the holding portions formed corresponding to the individual latching portions are formed so as to be spaced apart from each other.   The open / close valve is positioned with respect to the duct main body through a positioning hole formed in the open / close valve through a positioning portion formed in the duct main body when the open / close valve is installed in the duct main body. The manufacturing method of the vent duct as described in any one of 5-7.

Images