JP5525927B2 - Manufacturing method of seat pad with duct - Google Patents

Description

  The present invention relates to a seat pad for a seat cushion constituting a vehicle seat and a method for manufacturing a seat pad with a duct in which a duct is integrated by insert molding.

  Seat cushions that make up the seats and backrest of seats mounted on vehicles such as automobiles are the parts where the occupant sits down and touches directly. It may feel cold. For these reasons, seat seats are proposed in which the temperature is adjusted by providing an air distribution duct inside the seat pad (for example, Patent Documents 1 and 2).

JP 2009-165725 A JP 58-41512 A

  Here, it is necessary to connect the air distribution duct with the mating member for connection, and Patent Documents 1 and 2 both provide separate sealing members for the connection. In Patent Document 1, paragraph 0014 states that “an exhaust leakage prevention member 9 is provided between the exhaust port member 8 and the exhaust duct. The exhaust leakage prevention member 9 is formed of an elastic material such as resin or rubber”. Then, the exhaust port member 8 and the exhaust duct are connected by interposing the exhaust leakage prevention member 9 to ensure the sealing performance. Also in the ventilating device for an automobile seat seat of Patent Document 2, a state in which both ventilating pipe members are connected via a separate seal portion is disclosed in FIG.

As described above, the techniques of Patent Documents 1 and 2 use gasket sealing members in the same manner as general pipe connection even if the shapes are slightly different. A separate seal member must be prepared and assembled at the time of pipe connection, which increases the number of parts, assembly costs, and parts inventory management.
On the other hand, if the seal member is eliminated, the accuracy of both products of the air distribution duct and the connection partner member is required to avoid air leakage, leading to an increase in cost, and rubbing noise may be generated while the vehicle is running. There is.

  The present invention solves the above-described problem, and does not use a separate seal member for connecting the air distribution duct disposed on the seat pad and the connection counterpart member, and reduces the cost, thereby providing a general-purpose seal. It aims at providing the manufacturing method of the seat pad with a duct which enabled it to ensure the sealing performance similar to a member.

In order to achieve the above object, the gist of the invention described in claim 1 is that a duct for air distribution (6) provided with an air introduction part (61) and provided with a plurality of air outlets (64) in the duct path. The foam pad (1) is set in the foaming mold (7), and then the foaming raw material (m) is injected and the mold is closed, and then the seat pad (1) in which the duct (6) is embedded is foam-molded. Each of the air outlets (64) matches a plurality of air outlets (20) formed on the pad surface (1a), and the air introduction part (61) from the back surface (1b) of the seat pad (1) Is a method of manufacturing a duct-filled seat pad that protrudes from the air introduction part (61) by setting the duct (6) to the foaming mold (7) or closing the mold after setting the duct (6). The recess (73) is formed in the foam mold (7) so that the annular cavity (70k) surrounds the outer peripheral surface (61a) of the seat pad (1), and the cavity (70k) Flowed into The foamed raw material (m) is a method for producing a ducted seat pad, in which the gasket elastic seal portion (5) surrounding the outer peripheral surface (61a) of the air introduction portion (61) is also foam-molded. .
Here, in “through injection of foaming raw material (m) and mold closing”, the order of injection of foaming raw material (m) and mold closing does not matter.
According to a second aspect of the present invention, there is provided a method of manufacturing a seat pad with a duct according to the first aspect of the present invention. After a duct is used and the duct (6) is set in the foaming mold (7), the seat pad (1) in which the duct (6) is embedded is foam-molded, and then the waste bag (6d ), And the tip side portion (TP) is cut away from the air introduction portion (61). The manufacturing method of the ducted seat pad according to the invention of claim 3 is the method according to claim 1 or 2, wherein the tip portion (62) of the air introduction portion (61) is formed so that the outside diameter of the introduction portion decreases toward the tip. The elastic seal part (5) surrounds the outer peripheral surface of the tip part (62). The manufacturing method of the ducted seat pad according to the invention of claim 4 is the method according to claims 1 to 3, wherein the concave portion (62b) is formed on the outer peripheral surface of the tip portion (62) of the air introduction portion (61), and The elastic seal portion (5) covers the uneven portion (62b).

  The manufacturing method of a seat pad with a duct according to the present invention is a foam molding of a seat pad, wherein an elastic seal portion for a gasket is foam-molded at the same time, the sealing performance is secured by this elastic seal portion, and the duct and a mating member for connection are made. It becomes possible to connect and contributes to the reduction of the number of parts and the number of parts mounting man-hours, and exhibits excellent effects such as cost reduction and productivity improvement.

It is explanatory drawing sectional drawing of the foaming type used for the manufacturing method with one form of the manufacturing method of the sheet pad with a duct of this invention. It is the description which set the duct for wind distribution in the lower mold | type of FIG. It is explanatory sectional drawing which shows a mode that a foaming raw material is inject | poured into the lower mold | type of FIG. It is explanatory sectional drawing which shows a mode that the mold closing was carried out after foaming raw material injection | pouring of FIG. It is explanatory sectional drawing by which the sheet pad with a duct was foam-molded. It is the whole perspective view seen from the back side of the sheet pad with a duct removed after foaming of Drawing 5. It is the whole perspective view seen from the surface side of the sheet pad with a duct concerning FIG. It is the whole perspective view which looked at the seat pad of FIG. 7 from the surface side of the seat pad with a duct represented with a dashed-two dotted line. It is the IX-IX arrow directional view of FIG. It is the XX arrow directional view of FIG. It is the XI-XI line arrow directional view of FIG. (B) is an explanatory cross-sectional view of a foam molding process in place of FIG. 5, (b) is an explanatory cross-sectional view of cutting a discarded bag, and (c) is an explanatory cross-sectional view of a state in which a mating member is connected to an air introduction part. . FIG. 13 is a cross-sectional view of a main part of a ducted seat pad in place of FIG. 5 or FIG. It is principal part sectional drawing of the sheet pad with a duct replaced with FIG.

  Hereinafter, the manufacturing method of the sheet pad with a duct concerning the present invention is explained in full detail. 1 to 14 show one embodiment of a method for manufacturing a duct-padded seat pad according to the present invention. FIG. 1 is an explanatory sectional view of a foaming mold used in the manufacturing method, and FIG. 2 sets a duct for air distribution in the lower mold of FIG. 3 is an explanatory cross-sectional view showing a state in which a foaming raw material is injected into the lower mold of FIG. 2, FIG. 4 is an explanatory cross-sectional view showing a state in which the mold is closed after the injection of the foaming raw material in FIG. 3, and FIG. It is explanatory sectional drawing by which the entering sheet pad was foam-molded. 6 to 8 are perspective views of the entire duct-filled seat pad removed after the foam molding shown in FIG. 5, FIG. 9 is a view taken along line IX-IX in FIG. 8, and FIG. 10 is a view taken along line XX in FIG. FIG. 11 is a view taken along the line XI-XI in FIG. 7, and FIGS. 12 to 14 show other embodiments in place of the method for manufacturing the ducted seat pad in FIGS. 1 to 11. In FIG. 11, for easy understanding of the duct flow path 60, for convenience, the air introduction part and the horizontal cylinder part related to the duct are drawn on the same cross section.

  The manufacturing method of the seat pad with a duct uses the foaming mold 7 to set the air distribution duct 6 (hereinafter simply referred to as “duct”) in the foaming mold 7, and then inject the foaming raw material m and close the mold. Then, the seat pad 1 is foam-molded. And the elastic sealing part 5 for gaskets is foam-molded together by shaping | molding of this seat pad 1. FIG. The seat pad 1 with the duct 6 is used for a seat portion of a vehicle seat and a seat cushion S of a backrest. Here, the present invention is applied to the seat pad 1 with a duct 6 for a seat portion for a vehicle seat. Prior to foam molding, a duct 6 and a foam mold 7 are prepared.

The duct 6 is a resin tubular member made of propylene resin or the like embedded and integrated in the seat pad 1 by foam molding of the seat pad 1. This embodiment is a blow-molded duct 6 having a substantially H-shaped air distribution channel 60 in plan view as shown in FIGS. 8 and 9, and a pair of vertical cylinder portions from both ends of a horizontal cylinder portion 6b arranged in the vehicle width direction. 6a extends in the vehicle front-rear direction.
A plurality of air jets 64 are opened on the surface side of the duct 6. The “surface side” of the present invention refers to the side of the surface that comes into contact when an occupant sits on a seat. Here, the duct 6 is provided with a plurality of nozzle portions 65 for air jets 64 made of short pipes on the surface side.

On the other hand, an air introduction portion 61 is provided on the back side of the duct 6. The air introduction part 61 is integrally formed by resin molding of the duct 6, and is erected at the center of the back surface of the horizontal cylinder part 6b. The foam duct of the seat pad 1 is an insert duct 6 in which the main part of the duct is embedded, but the cylindrical air introduction portion 61 protrudes from the seat pad back surface 1b. At the stage where the seat pad 1 with the duct 6 is completed, the air introduction portion 61 whose front end opening becomes the air introduction opening e protrudes from the center of the back surface 1b of the seat pad 1 (FIG. 6).
Specifically, the bulge portion 6b ₁ is overhangs at substantially the center of the horizontal tubular portion 6b (Fig. 8, Fig. 9). Swollen portion 6b ₁ is bent to the back side at the tip, a cylindrical air inlet section 61 which forms the air inlet port e is as extended. The air introduction part 61 is formed so as to stand up with respect to the main part of the duct 6 on substantially the same plane. The duct 6 is provided with a tongue-like clip 67 and a mounting hole 671 as shown in FIG.

The foaming mold 7 used in the manufacturing method of the ducted seat pad is a split mold as shown in FIG. 1, and includes a lower mold 7a (one split mold) and an upper mold 7b (another split mold). Reference numeral 7c denotes a hinge. When the mold is closed as shown in FIG. 4 with the hinge 7c as a fulcrum, the mold surface 71 of the lower mold 7a is recessed in the shape of a bowl, and the mold surface 76 of the generally flat upper mold 7b having a recess 73 in part. Thus, the cavity 70 of the seat pad 1 with the duct 6 is formed. In the present manufacturing method shown in FIGS. 1 to 11, the sheet pad surface 1a side is molded by the mold surface 71 of the lower mold 7a, and the sheet pad rear surface 1b side is molded by the mold surface 76 of the upper mold 7b (FIG. 5).
In the lower mold 7a, the mold surface for the upper half part of the main part 2 is centered, and the mold surface for the upper half part of the side part 3 is formed on both sides thereof. The lower mold 7a is formed with a plurality of raised parts 72 by raising each part of the mold surface for the main part 2 in a columnar shape. The upper surface of each raised portion 72 is a flat surface 72a. When the seat pad 1 is molded, the air outlet 20 is provided on the seat pad surface 1 a on the passenger contact side by the raised portion 72.

Furthermore, a recess 73 is formed in the foaming mold 7 (here, the upper mold 7 b) so that the annular space 70 k surrounds the outer peripheral surface 61 a of the air introduction portion 61 by closing the duct 6 after setting the duct 6 to the foaming mold 7. Is done. The recess 73 is carved deeper than the mold surface 76a for the main part 2 constituting the seat pad back surface 1b, and stands up with respect to the main part of the duct 6 on substantially the same plane when the duct 6 is set to the foaming mold 7. The air introducing portion 61 to be received is accommodated in the recess 73. The outer peripheral surface of the air introduction part 61 is a mold closed after the tip surface 65b of the nozzle part 65 is applied to the flat surface 72a of the raised part 72 so as to block the air jet port 64 and the duct 6 is set on the lower mold 7a. A cylindrical recess 73 is formed in the upper die 7b so that the annular space 70k surrounds 61a. The upper die 7b is further formed with a recess 74 carved deeply into the center of the circular bottom surface of the cylindrical recess 73. By closing the mold, the air introduction portion end surface 61b around the air introduction port e of the duct 6 set in advance in the lower mold 7a comes into contact with the recess 74.
The upper die 7b is provided with a recess 74 that is one step deeper than the annular space 70k. However, the recess 74 is omitted, and the center of the circular bottom surface of the cylindrical recess 73 is simply around the air inlet port e associated with the air inlet 61. The end face 61b may be brought into contact. In addition, a recess 73 can be formed in the lower die 7a so that the annular space 70k surrounds the air introduction portion outer peripheral surface 61a only by setting the duct 6 to the lower die 7a without closing the die (described later). . The mold surface of the lower mold 7a is provided with a protrusion for the hanging groove 41 that forms the vertical groove 41a and the horizontal groove 41b, but the illustration is omitted.

Using the foaming mold 7 and the duct 6, the seat pad 1 with the duct 6 is manufactured, for example, as follows.
First, the foaming mold 7 is set to the mold open state of FIG. The duct 6 is set in the lower mold 7a in the mold open state. Each nozzle part 65 is set to the lower side, each air jet outlet 64 is closed, the nozzle tip surface 65b is brought into contact with the flat surface 72a of the raised part 72, and the duct 6 is set (FIG. 2). This is because, when the seat pad 1 is completed, the air outlets 64 are matched with the plurality of air outlets 20 formed on the seat pad surface 1a. The duct 6 is set in such a manner that a duct main portion formed on substantially the same plane is disposed horizontally, and an air introduction portion 61 projects upward from the duct main portion.
In the present embodiment, the nonwoven fabric 91 is set on the mold surface 7 of the upper mold 7b as shown in FIG. This is because when the seat pad 1 with the duct 6 is formed, the nonwoven fabric 91 covers the duct 6, and the nonwoven fabric 91 is integrally attached to the back surface 1b of the seat pad (FIGS. 9 to 11). In addition, illustration of the nonwoven fabric 91 is abbreviate | omitted in FIGS.

Next, a predetermined amount of foaming raw material m such as urethane foam stock solution for sheet pad molding is applied to the mold surface 71 of the bowl-shaped dent forming the cavity 70 of the lower mold 7a with the mold open. Inject (Figure 3). Subsequently, the upper die 7b is operated to close the die (FIG. 4). With this mold closing, the seat pad 1 cavity 70 in which the duct 6 is insert-set is formed. Furthermore, when the upper mold 7b and the lower mold 7a are closed, the air introduction portion 61 is inserted into the cylindrical recess 73, and the annular space 70k surrounds the air introduction portion outer peripheral surface 61a. The cylindrical front end surface 61b of the air introduction part 61 abuts on the depression 74 and closes the air introduction port e. The upper mold 7b is formed with a large recess 73 that encloses the air introduction part 61, and the annular cavity 70k surrounds the outer peripheral surface 61a of the air introduction cylinder part 61 by this recess 73 (FIG. 4). . The annular space 70k is connected to the seat pad 1 cavity 70.
In this embodiment, after setting the duct 6 to the foaming mold 7, the foaming raw material m is injected and then the mold is closed. However, after setting the duct 6 to the foaming mold 7, the mold is closed, and then the foaming raw material is used. m can also be injected.

  After the mold closing, the main process is foam molding. The mold closed state of FIG. 4 is maintained for a predetermined time, and the seat pad 1 in which the duct 6 is embedded and integrated is foam-molded. In the foam molding of the seat pad 1, the gasket elastic seal portion 5 surrounding the outer peripheral surface 61a of the air introduction portion 61 is simultaneously foam-molded by the foam raw material m flowing into the space 70k (FIG. 5). Since the nozzle portion 65 comes into contact with the flat surface 72a of the raised portion 72 so as to block the air introduction port e, the air outlet 64 matches the air outlet 20 formed on the seat pad surface 1a on the passenger contact side. Further, the recess 73 is carved deeper than the main part mold surface 76a constituting the seat pad back surface 1b, and is larger than the air introduction part 61 having the annular space 70k on the outer peripheral surface 61a of the air introduction part 61. Since the recess 73 is formed, the air introduction part 61 and the elastic seal part 5 protrude from the seat pad back surface 1b.

When the foam molding of the seat pad 1 and the elastic seal portion 5 is finished and removed, the desired seat pad 1 with the duct 6 is obtained (FIGS. 6 to 11). This is a seat pad 1 in which side portions 3 are formed on both sides of a main portion 2 and an air outlet 20 is formed on a surface 1a.
The conditioned air sent to the air introduction part 61 through the connection partner member 8 passes through the horizontal cylinder part 6b, the flow path 60 of the vertical cylinder part 6a, and the air outlet 64 as shown by the arrows in FIG. Blow out from mouth 20. Comfortable conditioned air is sent to the buttock Bu and leg portion TH of the occupant M sitting on the seat pad 1 (seat portion) (FIGS. 10 and 11). The thick cylindrical elastic seal portion 5 is raised from the back surface 1b of the seat pad, and wraps around the substantially entire circumferential surface 61a of the air introduction portion 61, leaving the tip portion 62 of the cylindrical air introduction portion 61 slightly (FIG. 6). The seat pad 1 with the duct 6 is completed in which the cylindrical elastic seal portion 5 for gasket is in contact with and surrounds the outer peripheral surface 61a of the air introduction portion 61 protruding from the back surface 1b of the seat pad 1.

  In the seat pad 1 with the duct 6 manufactured as described above, each air outlet 64 matches the plurality of air outlets 20 formed on the seat pad surface 1a on the occupant contact side, and air is supplied from the back surface 1b of the seat pad 1. The introduction part 61 protrudes. Further, the elastic seal portion 5 covers the outer peripheral surface 61a of the air introduction portion 61 protruding from the back surface 1b of the seat pad 1 in a thick cylindrical shape. Moreover, the elastic seal portion 5 is the seat pad 1 with a desired duct 6 that is manufactured together in the foam molding process of the seat pad 1. When the seat pad 1 containing the duct 6 is covered with the skin 99, the seat cushion S for the seat of the vehicle seat is obtained.

FIG. 12 is a cross-sectional view of an essential part of a foam molding step instead of FIG. The duct 6 in FIG. 12 is an enlarged view around the bulging portion 6 b ₁ and the air introduction portion 61.
Although the blow-molded duct 6 was used in the manufacturing method of the seat pad with ducts in FIGS. 1 to 11, the air introduction portion 61 was the final-shaped duct 6 in which the discarded bag 6 d was cut after blow molding. Here, the foam pad molding of the seat pad 1 and the elastic seal portion 5 is completed using the duct 6 with the discarded bag 6d made of blow molding left on the air introduction portion 61 side. After removing the mold, unnecessary portions including the disposal bag 6d (the tip side portion TP with respect to the air introducing portion 61) are cut out to obtain a desired seat pad 1 with the duct 6.

The foaming mold 7 used in the manufacturing method of FIG. 12 is different from FIGS. 1 to 5 in that the vertical positional relationship of the cavity 70 for the seat pad 1 produced by the foaming mold 7 is reversed. The seat pad back surface 1b side is molded with the mold surface 71 of the lower mold 7a, and the seat pad surface 1a side is molded with the mold surface 76 of the upper mold 7b. A plurality of raised portions 72 (not shown) are formed on the upper die 7b by raising each part of the die surface 76 in a columnar shape.
In addition, a cylindrical recess having a diameter slightly larger than the diameter of the air introduction portion 61 is formed in the lower die 7a so that the annular space 70k surrounds the outer peripheral surface 61a of the air introduction portion 61 by setting the duct 6 to the lower die 7a. 73 is formed. Further, since the duct 6 is used with the disposal bag 6d remaining, the recess 73 of the lower mold 7a is disposed further deeper in the recess 73 so that the disposal bag 6d is accommodated by setting the duct 6 on the lower mold 7a. A hemispherical depression 75 for the bag is engraved.

In the method for manufacturing the seat pad with duct of FIG. 12, the duct 6 is set on the lower mold 7a in the mold open state. Using the blow molded duct 6 with a discarded bag in which the discarded bag 6d remains on the air introducing portion 61 side, the duct 6 is set in the lower mold 7a of FIG. When the discarded bag portion 6 d is accommodated in the hemispherical recess 75, the annular recess 70 k surrounds the outer peripheral surface 61 a of the air introduction portion 61 by providing the large recess 73. Next, the foaming material m is injected into the lower mold 7a to close the mold.
Thereafter, as in FIG. 5, the seat pad 1 in which the duct 6 is embedded and the elastic seal portion 5 are foam-molded (FIG. 12A). In the foam molding process, since the blow molding duct 6 with the waste bag leaving the waste bag 6d on the air introduction part 61 side is used, there is no entry of the foam raw material m into the flow path 60 from the air introduction port e, which is more preferable. It has become. After foam molding of the seat pad 1 and the elastic seal portion 5 is finished, and after removal from the mold, the tip side portion TP is cut away from the air introduction portion 61 including the discarded bag 6d (b in FIG. 12). The tubular pad end face 61b of the air introduction part 61 and the tip end face 51 of the elastic seal part 5 are cut to be flush with the trimming jig to obtain the desired seat pad 1 with the duct 6. Reference numeral 6c denotes an unnecessary part on the air introduction part 61 side to be cut out, and reference numeral 59 denotes an unnecessary part on the elastic seal part 5 side to be cut off. On the outer peripheral surface of the air introduction portion 61, the gasket elastic seal portion 5 with the mating member for connection 8 is provided.

  FIG. 13 is a cross-sectional view of the main part of the seat pad 1 with duct 6 in place of FIG. 5 and FIG. The air introduction portion 61 is formed such that the outer diameter of the introduction portion decreases toward the tip end portion 62 of the air introduction portion 61. Using the blow-molded duct 6 having the air introduction portion 61, the blow-molded duct 6 is manufactured in the same manner as the manufacturing method of the ducted seat pad of FIG. 1 to FIG. 11 or FIG. By setting the duct 6 to the foaming mold 7 (not shown) or closing the mold after the duct 6 is set, there is a recess 73 that accommodates the air introduction part 61 and that the outer peripheral surface 61a of the air introduction part 61 is surrounded by the annular space 70k. It is formed in the foaming mold 7. Then, at the time of foam molding of the seat pad 1, the elastic seal portion 5 is foam-molded by the foam raw material m that has flowed into the space 70 k, and elastically applied to the outer peripheral surface 61 a of the air introduction portion 61 and further to the outer peripheral surface of the tip end portion 62. The seal part 5 is covered. As shown in FIG. 13, the outer diameter of the leading portion 62 of the air introducing portion 61 decreases toward the leading end. However, as shown in FIG. 13, the elastic seal portion 5 is provided around the reduced diameter portion 62a.

FIG. 14 is a cross-sectional view of the main part of the seat pad 1 with duct 6 in a method for manufacturing a seat pad with duct according to another aspect different from FIGS. It is a manufacturing method of the sheet pad with a duct of another mode which developed Drawing 13.
The leading end 62 of the air introducing portion 61 is formed so that the outer diameter of the leading portion decreases toward the leading end, and an uneven portion 62 b is provided on the outer peripheral surface of the leading end 62. The uneven portion 62b here is a streak-like recessed portion that is recessed from the outer peripheral surface. Two recessed portions 62b that circulate around the outer peripheral surface of the tip end portion 62 are provided apart from each other. Similar to the description of FIG. 13, the recess 73 is formed in the foaming mold 7, and the elastic seal portion 5 is foam-molded by the foam raw material m flowing into the space 70 k when the seat pad 1 is foam-molded. The elastic seal portion 5 is covered with the outer peripheral surface 61a of the outer peripheral surface 61a and the reduced diameter portion 62a and the recessed portion 62b of the tip portion 62. The elastic seal portion 5 is also provided so as to surround the reduced diameter portion 62a and the recessed portion 62b of the distal end portion 62 associated with the air introduction portion 61.

According to the manufacturing method of the seat pad with the duct configured as described above, by setting the duct 6 to the foaming mold 7 (FIGS. 4 and 5) or closing the mold after setting the duct 6 (FIG. 12), The foaming die 7 is provided with a recess 73 that surrounds the outer peripheral surface 61a of the air introduction portion 61 with an annular space 70k. Then, the foaming raw material m flows into the space 70k by foam molding of the seat pad 1, whereby the gasket elastic seal portion 5 can be foam molded on the outer peripheral surface 61a of the air introduction portion 61. Since the annular space 70k is electrically connected to the seat pad 1 cavity 70, the elastic seal portion 5 can be formed simultaneously with the seat pad 1 without requiring any special work. Due to the presence of the elastic seal portion 5, the fitting portion of the mating member 8 can be transferred to the cylindrical air introduction portion 61 with the elastic seal portion 5 as shown in FIG. The connection between the duct 6 and the mating member 8 can be performed only by inserting. As shown in FIG. 13 (b), than the inner diameter D ₂ of the tubular fitting portion 80 connected to the body 81 of the mating member 8, by increasing the cylinder outer diameter D ₁ of the elastic seal portion 5, white mating member 8 If it is inserted as indicated by a pull-out arrow, the elastic seal portion 5 is interposed in a compressed state between the air introduction portion 61 and the mating member 8 as shown in FIGS. Thus, the air introducing portion 61 and the mating member 8 can be easily connected. Since a separate seal member is not required as in the prior art, it is possible to eliminate the increase in the number of parts, the trouble of assembling them, and the cost increase of parts inventory management.

  Further, when the blow-molded duct 6 with a discarded bag with the discarded bag 6d left is used on the air introducing portion 61 side, the foaming raw material m enters the duct channel 60 from the air inlet port e during foam molding. Can be prevented, leading to quality improvement. After the duct 6 is set in the foaming mold 7, the seat pad 1 in which the duct 6 is embedded is foam-molded. After that, including the waste bag 6d, the tip side portion TP is cut away from the air introduction part 61. Since the air introduction port e opens after demolding, the foaming raw material m does not enter the duct flow path 60 in the foam molding process. At the time of foam molding, the air introduction port e is closed with the discard bag 6d, so that the mold surface around the air inlet can be easily finished, and the effect of reducing the mold cost is exhibited.

  Further, when the distal end portion 62 of the air introduction portion 61 is formed so that the outer diameter of the introduction portion decreases toward the distal end, and the elastic seal portion 5 surrounds the outer peripheral surface of the distal end portion 62, the air introduction portion 61 is opposed to the other end. When the member 8 is inserted, the elastic seal portion 5 is prevented from being accompanied by the insertion movement at the reduced diameter portion 62a in which the outer diameter of the air introduction portion 61 is reduced. When the mating member 8 is fitted and connected to the air introduction portion 61 in the direction of the white arrow in FIG. 13A, the elastic seal portion 5 is difficult to move along in the direction of the white arrow. The elastic seal portion 5 remains in the reduced diameter portion 62a by the reduced diameter portion 62a in which the outer diameter of the introduction portion is reduced. The elastic sealing portion 5 is more preferable because the sealing performance is smoothly maintained.

Here, the elastic seal portion 5 is foam-molded on the outer peripheral surface 61a of the air introduction portion together with the seat pad 1 in which the duct 6 is embedded and integrated, but the seat pad 1 made of the urethane material used in the present embodiment, the elastic seal portion 5 and a molded article made of polypropylene resin or the like used as the air distribution duct 6 have poor adhesion. If the elastic seal portion 5 simply surrounds the outer peripheral surface 61a of the air introduction portion 61, the counterpart member 8 is moved in the direction of the white arrow in FIG. There is a possibility that the function as a gasket cannot be exhibited by being dragged by the movement of the member 8. However, since the elastic seal portion 5 also covers the reduced diameter portion 62a, the elastic seal portion 5 on the air introduction port e side of the reduced diameter portion 62a serves as a stopper to the air introduction portion 61 of the mating member 8. It becomes out of sync with the insertion movement. This is extremely effective in improving workability when connecting to the mating member 8 and maintaining the sealing performance by the elastic seal portion 5.
In addition, in this manufacturing method, the duct 6 made of propylene resin having poor adhesion to the urethane seat pad 1 is disposed on the seat pad back surface 1b side, but the nonwoven fabric 91 covers the duct 6 and is integrated with the seat pad back surface 1b. Since it adheres, a sense of unity of both is enhanced and it is suitable.

  In addition, as shown in FIG. 14, when the concave and convex portion 62b is formed on the outer peripheral surface of the tip portion 62 of the air introducing portion 61 and the elastic seal portion 5 covers the concave and convex portion 62b, the sealing performance by the elastic seal portion 5 Workability at the time of connection is further improved. When the mating member 8 is inserted and connected in the direction of the white arrow toward the air introduction portion 61 in FIG. 14 (a), the elastic seal portion 5 entering not only the reduced diameter portion 62a but also the recessed portion 62b serves as a stopper. The main body of the elastic seal part 5 is prevented from moving in the direction of the white arrow. By connecting the mating member 8 to the air introducing portion 61, the recessed portion 62b further enhances the sealing performance and workability, which is further beneficial.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, material, and the like of the seat pad 1, the elastic seal portion 5, the duct 6, and the foaming mold 7 can be appropriately selected according to the application. For example, in the embodiment, the nozzle portion 65 for the air jet port 64 is provided, but without providing the nozzle portion 65, a hole can be directly formed in the duct 6 to be used as the air jet port 64.

1 Seatpad 1a Surface (Seatpad surface)
1b Back side (Seat pad back side)
20 Air outlet 6 Duct for air distribution (duct)
61 Air introduction part 61a Outer peripheral surface 62 Tip part 62b Uneven part (recessed part)
64 Air outlet 6d Disposal bag 7 Foam type 70k Annular void (vacant space)
73 Depression m Foaming raw material

Claims (4)

The air distribution duct (6) provided with an air introduction part (61) and a plurality of air outlets (64) in the duct path is set in the foaming mold (7), and then the foam raw material (m) After injection and mold closing, the seat pad (1) in which the duct (6) is embedded is foam-molded, and a plurality of air outlets (20) are formed on the seat pad surface (1a) on the passenger contact side. A method for producing a ducted seat pad in which each of the air jets (64) matches, and the air introduction part (61) protrudes from the back surface (1b) of the seat pad (1),
By setting the duct (6) to the foaming mold (7) or closing the mold after the duct (6) is set, the outer circumferential surface (61a) of the air introduction part (61) is formed into an annular space (70k). A recess (73) is formed in the foam mold (7) so as to surround the foam pad (1), and the air introduction is performed by the foam raw material (m) flowing into the space (70k) by foam molding of the seat pad (1). A method for producing a ducted seat pad, wherein the gasket elastic seal portion (5) surrounding the outer peripheral surface (61a) of the portion (61) is also foam-molded. As the duct (6), a blow-molded duct with a discarded bag is used while leaving the discarded bag (6d) on the air introduction part (61) side, and the duct (6) is set in the foaming mold (7). After that, the seat pad (1) in which the duct (6) is embedded is foam-molded, and then, including the disposal bag (6d), the tip side part (TP) from the air introduction part (61). The method for producing a ducted seat pad according to claim 1, wherein: The tip (62) of the air introduction part (61) is formed so that the outer diameter of the introduction part becomes smaller toward the tip, and the outer peripheral surface of the tip (62) is surrounded by the elastic seal part (5). The manufacturing method of the sheet pad with a duct of Claim 1 or 2. An uneven part (62b) is formed on the outer peripheral surface of the tip part (62) of the air introduction part (61), and the elastic seal part (5) covers the uneven part (62b). 4. A method for manufacturing a duct-filled seat pad according to any one of 3 above.

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