JP2017144804A - Vehicle seat pad and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat pad in which an air distributing flow passage of air-conditioning air can be easily formed, and the amount of air from each penetrating hole is well balanced to blow out for increasing comfort, and a manufacturing method thereof.SOLUTION: In a vehicle seat pad including a pad body 1 made of foam and a backing material 4 made of a non-woven fabric that is attached to and integrated with a rear surface of the pad body 1, the vehicle seat pad includes: an air distributing groove 21 which is dented from a surface 1a of the pad body 1 to a side of a rear surface 1b with a cross section of a dented shape and is formed along the surface 1a in the form of a groove; an air introducing part 22 formed on a groove bottom 210 of the air distributing groove 21 by penetrating toward the rear surface 1b of the pad body 1; and a laid slab 7 which is a plate-like body with a density and rigidity that are lower than those of the pad body 1, whose plate surface is joined to the surface 1a of the pad body 1, and in which a plurality of penetrating holes 70 having a bore diameter smaller than a width of a groove opening 210 are formed at a site corresponding to the groove opening 210 of the air distributing groove 21.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat pad constituting a vehicle seat and a method for manufacturing the same.

  There is a seat pad with a duct that constitutes a seat portion and a backrest of a seat seat mounted on an automobile or the like. Although the main component is a pad body such as a flexible polyurethane foam, in recent years, an air distribution channel for air-conditioning air whose temperature has been adjusted is formed inside, and the invention has been improved by sending the air-conditioning air to a seated passenger Some have been proposed (for example, Patent Document 1).

JP 2009-90016 A

However, as disclosed in Patent Document 1, the patent document 1 “closes the air guide hole with a pad having a slit-like air guide hole penetrating from the front surface to the back surface and the rear side of the pad. A substrate having an inlet hole communicating with the hole, and a cover having a plurality of outlet holes closing the air guiding hole at the front surface of the pad and communicating with the air guiding hole, wherein the air guiding hole is curved. If the nonwoven fabric is used for the base material, the air in the air guide hole may leak through the base material. On the other hand, if it is closed with a solid plate, the backrest (equivalent to the seat pad of the present invention) originally needs a backing material made of non-woven fabric to eliminate rubbing noise with the vehicle frame. It becomes a part and the number of parts increases.
In addition, the vehicle seat pad must be comfortable enough to meet the pursuit of comfort. Just by providing a plurality of outlet holes as in Patent Document 1, the amount of air-conditioning air blown out from each outlet hole (the perforation hole of the present invention) becomes unbalanced, which may impair comfort.
Further, the seat pad is covered with a skin to become a vehicle seat cushion, and it is necessary to provide a suspension groove for locking the skin on the seat pad, but it is more preferable if the suspension groove can be easily made. .

  The present invention solves the above-described problems, and can easily form an air-distribution flow path for air-conditioned air, and can further improve comfort by blowing out the air amount from each drilled hole in a well-balanced manner. And it aims at providing the manufacturing method.

In order to achieve the above object, the gist of the invention described in claim 1 is a vehicle comprising: a pad body made of a foam; and a backing material made of a non-woven fabric integrally attached to the back surface of the pad body. In the seat pad for use in the present invention, an air distribution groove that is recessed in a cross-sectional shape from the front surface to the back surface of the pad main body and is formed in a groove shape along the surface, and the pad main body at the groove bottom of the air distribution groove. An air introduction portion formed so as to penetrate toward the back surface, and a plate-like body having a density and hardness smaller than the density and hardness of the pad main body, the plate surface being bonded to the surface of the pad main body, and the arrangement The vehicle seat pad further includes a placing slab in which a plurality of perforations having a hole diameter smaller than the width of the groove opening are formed in a corresponding portion of the groove opening related to the air groove. A vehicle seat pad according to a second aspect of the present invention is the vehicle seat pad according to the first aspect, wherein the number of the perforated holes in the corresponding portion of the groove opening of the air distribution groove and the hole area in which the number of the perforated holes are gathered are It is characterized by an increasing tendency as the distance from the distance increases. A vehicle seat pad according to a third aspect of the present invention is the main part according to the first or second aspect, wherein the pad main body is a cushion pad, the placing slab is made of open-cell foam, and the size in plan view is the cushion pad. The suspension slab is attached to the main portion of the slab so that a hanging groove for attaching the skin is formed by the surface of the pad body and the thick wall of the slab. It is characterized by that.
The gist of the invention described in claim 4 is that after the backing material is set in the foaming mold, the foam body is injected and the mold is closed, and then the pad body on which the backing material made of nonwoven fabric is adhered and integrated on the back surface is foamed. A method of manufacturing a vehicle seat pad to be molded, wherein a raised portion for an air distribution groove that dents the surface is provided in a bank shape on a mold surface of one split mold for molding the surface side of the pad main body, Pads with air distribution grooves in which the backing material is integrally attached using a foaming mold in which a projecting portion for an air introduction part is erected on a part of the top surface of the raised part toward another divided mold After foam molding of the main body, the pad main body is taken out by demolding, and the density and hardness are made a plate-like body smaller than the density and hardness of the pad main body, and the hole diameter is larger than the width of the groove opening related to the air distribution groove. A placing slab in which a plurality of small drilling holes are formed is placed on the corresponding part of the groove opening.設孔 is so as to be disposed a plurality, in the manufacturing method of the vehicle seat pad which is characterized in that is bonded to the surface of the pad body. According to a fifth aspect of the present invention, there is provided a vehicle seat pad manufacturing method according to the fourth aspect, wherein the number of the perforated holes arranged in the corresponding portion of the groove opening related to the air distribution groove and the hole area obtained by collecting the number of the perforated holes are collected. The setting slab is adhered to the surface of the pad body by setting the corresponding part of the groove opening farther away from the air introduction part to increase.

  The vehicle seat pad and the manufacturing method thereof according to the present invention do not allow air-conditioning air in the air distribution passage to leak to the back side of the pad body, and can be applied to a popular vehicle with a low-cost structure. The amount of air blown out from the hole is equalized, so that the user can feel more comfortable, and moreover, the suspension groove can be easily constructed.

1 is a schematic exploded perspective view of a vehicle seat pad according to the present invention. It is a schematic perspective view of the seat pad of FIG. It is the III-III arrow directional view of FIG. It is the IV-IV line arrow directional view of FIG. FIG. 5 is an explanatory cross-sectional view of a foaming mold in which a foaming raw material is injected in a mold open state in molding of a portion in the VV line arrow view of FIG. 2. FIG. 6 is an explanatory cross-sectional view of the foaming mold after FIG. It is the elements on larger scale of FIG. It is the elements on larger scale of the placing slab of the other mode which replaces the placing slab of FIG.

  Hereinafter, the vehicle seat pad and the manufacturing method thereof according to the present invention will be described in detail. 1 to 8 show an embodiment of a vehicle seat pad (hereinafter also simply referred to as “seat pad”) and a method of manufacturing the same according to the present invention. FIG. 1 is a schematic exploded perspective view of the seat pad, and FIG. 3 is a schematic perspective view of the seat pad, FIG. 3 is a view taken along the line III-III in FIG. 2, FIG. 4 is a view taken along the line IV-IV in FIG. 2, and FIG. FIG. 6 is a cross-sectional view of the foaming mold, FIG. 6 is a cross-sectional view of the foaming mold that is closed after FIG. 5, toward foam molding, FIG. 7 is a partially enlarged view of FIG. 4, and FIG. It is the elements on larger scale of the place slab of the other alternative. For easy understanding of the drawing, the pad main body 1 and the foaming mold 8 are simply illustrated.

(1) Manufacturing method of vehicle seat pad The seat pad manufacturing method is as follows. After the backing material 4 is set on the foaming mold 8, the foaming raw material g is injected and the mold is closed, and the backing material 4 is covered on the back surface 1b. The pad body 1 to be integrated is foam-molded, removed from the mold, placed on the pad body surface 1a, and the slab 7 is adhered to make the seat pad P (FIGS. 1 to 7). Here, the present invention is applied to a cushion pad for a seat portion of a vehicle seat. Prior to foam molding, a backing material 4, a placing slab 7, and a foaming mold 8 are prepared.

  The backing material 4 is made of non-woven fabric and has a size that covers substantially the entire area of the pad main body back surface 1b (FIGS. 3 and 4). An opening 40 is provided at a portion corresponding to the air introduction port 22 a formed in the pad main body 1 in the approximate center of the backing material 4.

The placing slab 7 is a plastic foam whose plate surface 7b is bonded to the surface 1a of the pad main body 1 (specifically, the main portion 2). The placing slab 7 is created using an open-cell foam slab (the urethane slab in the present embodiment) having a density lower than that of the pad body 1 and having a hardness lower than that of the pad body 1.
A hanging groove recess 75 is formed in the placing slab 7 here. The placing slab 7 is partitioned into a central portion 7A, both side portions 7B, and a rear portion 7C by a vertical recess 75a and a horizontal recess 75b related to the suspension groove recess 75. These are the sizes corresponding to the central part 2A of the main part 2, the two sides 2B of the seat part, and the rear part 2C of the seat part. Further, as shown in FIGS. 1 and 2, the placing slab 7 has a plan view size slightly smaller than the size of the main portion 2 constituting the pad main body 1. By joining the placing slab 7 to the main portion 2, the hanging groove 11 for attaching the skin is formed by the surface 1 a of the pad main body 1 and the plate wall 79 of the placing slab 7. As shown in FIG. 2, the hanging grooves 11 are formed on the outer peripheral sides of the side part 2B and the rear part 2C of the seat part. The surface portion of the main portion 2 becomes the bottom wall 110 of the hanging groove 11, and the thick wall 79 of the slab 7 and the inner wall 31 of the side portion 3 become standing walls to form the hanging groove 11 for attaching the skin (see FIG. 7).

  In the central portion 7 </ b> A and the side portions 7 </ b> B of the placing slab 7, a punching hole 70 having a hole diameter smaller than the width of the groove opening 210 associated with the air distribution groove 21 is formed. In this manufacturing method, after foam-molding the pad main body 1 with the air distribution groove 21 provided with the air introduction portion 22, the placing slab 7 is in the corresponding portion 71 of the groove opening 210 related to the air distribution groove 21 in the range of 3 mmφ to 10 mmφ. Adhering to the pad main body surface 1a in such a manner that a plurality of perforations 70 are arranged. For example, in the pad main body 1 of FIG. 1, the air distribution groove 21 formed on the surface 1a side thereof looks like a person from the trunk groove 21a disposed in the center of the pad main body 1 as shown in FIG. The head groove 21b and the limb grooves 21c and 21d extend in the four horizontal directions (details will be described later). The corresponding portion 71 of the groove opening 210 related to the air distribution groove 21 has a torso corresponding portion 71a, a head corresponding portion 71b, and limb corresponding portions 71c and 71d, and a plurality of drill holes 70 are formed in these portions. The placed slab 7 is adhered to the pad main body surface 1a. Here, the “surface side” in the present invention refers to the side of the surface that comes into contact when the occupant sits on the seat, and the “horizontal direction” refers to the surface direction of the surface.

  In the slab 7, as shown in FIG. 1, the number of perforated holes 70 arranged on the groove opening 210 and the hole area where the number of the holes are gathered are increased by the corresponding portion 71 of the groove opening 210 far from the air introduction part 22. It is set to become a trend. By making it an increase tendency, the ventilation volume per unit area in each corresponding part 71 can be equalized easily. A perforation hole 70 is provided in the body corresponding part 71a, the head corresponding part 71b, and the hand corresponding part 71d at a substantially equidistant point from the air introduction part 22, and the perforation hole 70 and the air are provided in the hand corresponding part 71d. The perforation holes 70 are provided at each point where the distance is sequentially reduced from L1 to L5 from the elbow part to the hand part rather than the distance from the introduction part 22. In addition, in the foot corresponding part 71c, as shown in FIG. 3, the hole 70 is formed at each point where the distance is sequentially reduced from L6 to L9 from the hole 70 provided in the body corresponding part 71a toward the tip of the foot. It is provided to equalize the air flow rate per unit area of each corresponding portion 71.

The foaming mold 8 is a split mold as shown in FIGS. 5 and 6, and includes a lower mold 8a and an upper mold 8b. The lower mold 8a and the upper mold 8b are connected to each other by a hinge (not shown) so as to be opened and closed. When the mold is closed as shown in FIG. 6 with the hinge as a fulcrum, the lower mold surface 81 and the upper mold surface 86 form a cavity C of the seat pad P. In this manufacturing method, the pad main body surface 1 a side is formed by the lower mold surface 81, and the pad main body rear surface 1 b side is formed by the upper mold surface 86.
On the mold surface 81 of the lower mold 8a, 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 disposed on both sides thereof. In the present invention, the raised portion 82 for the air distribution groove 21 for recessing the pad main body surface 1a is further provided in the shape of the main portion 2 mold surface of the lower die 8a, and a part of the top surface 820 of the raised portion 82 is provided. In addition, a projecting portion 821 for the air introduction portion 22 that guides the air-conditioning air to the air distribution groove 21 is erected toward the other divided upper mold 8b. When the mold is closed, the projecting end surface 822 of the projecting portion 821 passes through the opening 40 of the backing material 4 and contacts the upper mold surface 86.

Using the backing material 4, the placing slab 7, and the foaming mold 8, the seat pad P is manufactured, for example, as follows.
First, the foaming mold 8 is set to the mold open state of FIG. The backing material 4 is set on the upper mold 8b in the mold open state. Next, a predetermined amount of foaming raw material g such as a pad body molding urethane foaming stock solution is injected onto the lower mold surface 81 forming the cavity C of the lower mold 8a with the mold open. To do.

  Subsequently, the upper die 8b is operated to close the die (FIG. 6). By closing the upper mold 8b and the lower mold 8a, a pad body cavity C in which the backing material 4 is insert-set is formed. When the mold is closed, the projecting end surface 822 of the projecting portion 821 contacts the upper mold surface 86. On the other hand, the raised portion 82 is raised in a bank shape in accordance with the shape of the air distribution groove 21 in FIG. 1, but a constant space is maintained between the top surface 820 of the raised portion 82 and the upper mold 8b. This is because the groove bottom 211 is formed in the air distribution groove 21. FIG. 6 is a cross-sectional view of the foaming mold 8 corresponding to the view taken along the line IV-IV in FIG. 2, but the body forming ridges 82a and the hand forming ridges 82d on both sides thereof are shown in FIG. The height of the surface 820 is made the same and a predetermined distance is set between the surface 820 and the upper mold surface 86.

After the mold closing, the process proceeds to foam molding of the pad body 1. The mold closed state of FIG. 6 is maintained for a predetermined time, and the pad body 1 to which the backing material 4 is attached and integrated is foam-molded. The backing material 4 is attached to the back surface 1b side, and the pad main body 1 having the air distribution grooves 21 that are recessed in a cross-sectional concave shape on the front surface 1a side is foam-molded by the raised portions 82. The air distribution groove 21 opens with the pad main body surface 1a side serving as a groove opening 210, but the pad main body back surface 1b side has a groove bottom 211 formed by the pad main body 1 and does not penetrate like the air guide hole of Patent Document 1. . Only the air introduction portion 22 that guides the air-conditioning air into the air distribution groove 21 is formed through the projecting portion 821 from the groove bottom 211 of the air distribution groove 21 toward the back surface 1b of the pad main body 1. By contacting the upper mold surface 86 of the projecting portion 821, only the air introduction port 22a is opened in the pad main body back surface 1b. The air distribution groove 21 has a groove width larger than the hole diameter of the drill hole 70 formed in the slab 7, and the entire shape of the groove opening 210 appearing on the pad surface is changed from the trunk groove 21a to the head groove 21b, limbs as shown in FIG. The grooves 21c and 21d are shaped like a person extending horizontally in all directions.
If foam molding of the pad main body 1 is completed and removed, the pad main body 1 with the air distribution grooves 21 with the backing material 4 attached and integrated as shown in FIG. 3 is obtained.

In the present invention, after removing the mold, the placing slab 7 is bonded to the surface 1a of the pad body 1 with the air distribution grooves 21. The placing slab 7 in which a plurality of perforations 70 are formed is bonded to the surface 1a of the pad main body 1 such that a plurality of perforations 70 are arranged in the corresponding portions 71 of the groove openings 210 such as the limb grooves 21c and 21d. Let The suspension groove 11 is formed on the outer peripheral side of the both side portions 2B and the rear portion 2C of the seat portion so that the central portion 2A, the side portion 2B, and the rear portion 2C of the seat main portion 2 of the pad main body 2 are formed. The center portion 7A, the side portion 7B, and the rear portion 7C of the placing slab 7 are bonded and fixed to complete a desired seat pad P (FIG. 2). When the seat pad P is covered with the skin 9, a seat cushion for a seat for a vehicle seat is completed (FIG. 4).
In addition, although the magnitude | size and shape of each drilling hole 70 were made the same, you may change a magnitude | size and a shape. Reference numeral 2D denotes an inclined portion of the pad body 1, and reference numeral 2E denotes a contact surface portion with the back sheet. Reference numeral 11 a denotes a vertical groove hanging groove, reference numeral 11 b denotes a horizontal groove hanging groove, reference numerals 81 a and 86 a denote mold-matching surfaces, and reference numeral 88 denotes a convex portion forming the hanging groove 11.

  FIG. 8 is a partial enlarged perspective view corresponding to FIG. 1, showing another embodiment product in place of the slab 7 of FIG. In the slab 7 shown in FIG. 8, each hole 70 is finely dispersed smaller than that shown in FIG. The corresponding part 71 of the groove opening 210 far away from the introduction part 22 is set to increase. The amount of air blown from each hole 70 can be blown out more finely and with a good balance.

(2) Vehicle seat pad A vehicle seat pad P obtained by the above-described manufacturing method or the like includes a pad main body 1 made of a foam, and a backing material 4 attached and integrated on the back surface 1b of the pad main body 1. The seat pad P includes an air distribution groove 21 and an air introduction portion 22 formed in the pad main body 1, and a placing slab 7 joined to the surface 1 a of the pad main body 1.

  The pad main body 1 is a cushion body having the shape of a seat as shown in FIGS. 1 and 3, and a foaming molding in which a backing material 4 made of a nonwoven fabric is adhered and integrated on the back surface 1b. The backing material 4 made of non-woven fabric serves to prevent rubbing noise generated between the seat pad P installed in the vehicle and the vehicle frame.

The air distribution groove 21 is recessed in a cross-sectional shape from the front surface 1a to the back surface 1b side of the pad main body 1 and is formed in a groove shape along the front surface 1a, and is a main component of the air distribution flow path u. The air introduction part 22 is a through-hole formed at one location of the groove bottom 211 of the air distribution groove 21 toward the back surface 1b of the pad main body 1, and is a circular hole here.
The air distribution groove 21 having a concave cross section formed by the groove bottom 211 and the groove wall 212 standing on both sides thereof extends horizontally in the pad main body surface 1a side with the air introduction portion 22 being substantially in the center. When the air introduction part 22 is formed in the groove bottom 211 of the trunk part groove 21a and is installed in the vehicle, the head part groove 21b extends rearward from the trunk part groove 21a. Further, the foot groove 21c extends from the trunk groove 21a to the vehicle front side, while the upper arm portion of the hand groove 21d extends in the vehicle width direction, and then the forearm portion extends forward of the vehicle.

  The slab 7 is made of an open cell foam whose density and hardness are smaller than the density and hardness of the pad body 1, and as shown in FIG. 1, the central portion 7A, the side portion 7B, and the rear portion are interposed via the hanging groove recess 75. It is a plate-like body in which the portions 7C are connected. The place slab 7 is formed with a plurality of perforated holes 70 having a diameter smaller than the width of the groove opening 210 in the corresponding portion 71 of the groove opening 210 related to the air distribution groove 21. The placing slab 7 has a perforated hole 70 that serves as an air outlet for air-conditioning air, and forms an air distribution channel u with the air distribution groove 21. The trunk corresponding part 71a, the head corresponding part 71b, the limb corresponding part 71c, 71d of the slab 7 which becomes the corresponding part 71 of each groove opening 210 related to the trunk groove 21a, the head groove 21b, the limbs groove 21c, 21d. A perforation hole 70 is formed in the region (FIG. 2). The plate surface 7b of the placing slab 7 is bonded and fixed to the pad main body surface 1a to form the seat pad P. Although the slab 7 is made of open cell foam having air permeability, the air conditioned air blown from the air introduction part 22 is different from the drilled hole 70 even if it is air permeable. A comfortable wind is sent to the occupant exclusively through the hole 70.

  Further, the size of the slab 7 of the present embodiment in plan view is set slightly smaller than the surface area of the main portion 2 in the vehicle width direction and the vehicle front-rear direction when the vehicle is installed (FIG. 2). The placing slab 7 is joined to the main portion 2 so as to leave the outer peripheral portion of the surface of the main portion 2. Thus, a longitudinal groove 11a is formed by the surface portion of the main portion 3, the inner wall 31 of the side portion 3, and the thick wall 79 of the placing slab 7 (FIG. 7), and the surface portion of the main portion 3, the inclined portion 2D and the placing slab. 7 is formed with the thick wall 79 (FIG. 2).

The placement slab 7 has a corresponding number of holes 71 in the corresponding portions 71 of the respective holes 70, and the corresponding area 71 of the groove opening 210 that is far from the air introduction part 22 in the number of the holes 70 that are collected. Those having an increasing tendency are more preferable. The ventilation resistance increases as the groove opening 210 is farther away from the air introduction port 22a. However, as in the seat pad P in FIGS. By doing so, it is possible to cover the decrease in the amount of blowout per hole 70 by the number. The amount of air-conditioning air per unit area at the groove opening 210 such as the limb corresponding portions 71c and 71d can be equalized. Although there may be a part where one perforation hole 70 is formed like the head corresponding part 71b in FIG. 1, the perforation hole 70 is made small and the perforation hole 70 is formed in each corresponding part 71 as shown in FIG. It is more preferable to form a plurality of layers. If the perforation hole 70 is large, when the surface of the skin 9 is seen when the seat pad P is covered with the finished seat pad P and the surface of the skin 9 is viewed, the position of the perforation hole 70 is depressed or the outer periphery of the perforation hole 70 is This is because the highlights that can be made are sometimes noticeable. Even if the hole diameter of the hole 70 becomes small, the required air volume can be secured by increasing the number of holes 70.
Other configurations are the same as those described in (1) Manufacturing method of vehicle seat pad, and the description thereof is omitted.

(3) Effects The vehicle seat pad configured as described above and the manufacturing method thereof are arranged in a concave shape in cross section from the front surface 1a to the back surface 1b side of the pad main body 1 and formed in a groove shape along the front surface 1a. Since the air groove 21 is formed, the base material which closes the pad main body back surface 1b like patent document 1 is not required. A backing material 4 made of a nonwoven fabric for preventing rubbing noise with the vehicle frame is attached to the back surface 1b of the pad body. However, in Patent Document 1, if this is used as a base material, the nonwoven fabric has air permeability. The air blowing performance is reduced. Patent Document 1 requires a base material that is a separate member such as a solid plate that prevents air-conditioning air from leaking to the pad main body back surface 1b side in addition to the backing material 4. On the other hand, according to the present invention, the pad main body 1 itself forming the groove bottom 211 prevents air-conditioning air leakage to the pad main body back surface 1b side, so that there is no need for another component such as a base material. The number of parts is reduced, and the cost of the seat pad P can be reduced.
The air distribution channel u can be easily formed by the air distribution groove 21 and the placing slab 7, and the air-conditioning air in the air distribution channel u does not leak to the back surface 1b of the pad main body, resulting in a high air flow performance. It has become. Moreover, the air distribution groove 21 can be easily formed by foam molding of the seat pad P by providing the raised portion 82 in the foaming mold 8. In addition, the air introduction part 22 for guiding the air-conditioning air into the air distribution groove 21 is a protrusion for the air introduction part 22 that stands on the part of the top surface 820 of the lower mold raised part 82 toward the upper mold 8b. It is only necessary to provide the portion 821. At the time of foam molding of the pad main body 1, the air introduction portion 22 can be simultaneously molded by the protruding portion 821. There is no need to form the air introduction part 22 by post-processing. Since it has a simple structure and can be produced at low cost, the seat pad P that sends air-conditioned air to a seated occupant to improve comfort can be applied to popular vehicles and the like.

  Then, if the placing slab 7 is formed with a plurality of drilling holes 70 having a hole diameter smaller than the width of the groove opening 210, a plurality of the drilling holes 70 are provided even at a small size, so that the blowout at the limb corresponding portions 71c, 71d, etc. The amount can be easily adjusted and secured. Even if the breathable skin 9 is placed on the seat pad P, the hole diameter of the hole 70 is small, so that the position of the hole 70 is depressed or a highlight appears at the periphery of the hole 70, thereby impairing the appearance. Nor.

Further, when the placing slab 7 is made of a plate-like body whose density is lower than that of the pad body 1 and whose hardness is lower than that of the pad body 1, the cushioning property of the seat pad P is increased. Better and more comfortable. Incidentally, if the pad body 1 has a low density and a low hardness, a problem such as bottoming occurs when the occupant is seated, so a predetermined density and a predetermined hardness for maintaining the shape retention are required. Although it may be difficult to obtain a good cushioning property, this can be eliminated with the slab 7. The placing slab 7 is more preferably made of an open-cell foam slab in order to enhance cushioning properties.
Here, even if the slab 7 is made of a breathable open-cell foam, the use of the breathable open-cell foam slab is not limited to the use of the breathable open-cell foam slab. This is because the air-conditioned air distributed by the slab is dispersed and the momentum of the air blowing is weakened even if it has the property. With the formation of the hole 70, the slab 7 can deliver the comfortable air felt by the occupant seated by the air-conditioning air distributed from the hole 70 passing through the hole 70 exclusively.

Further, even in the drill hole 70 having a small hole diameter, a plurality of the drill holes 70 are formed in the corresponding portions 71 of the groove opening 210 related to the trunk groove 21a, the head groove 21b, etc. The necessary amount of air-conditioning air that delivers a comfortable wind to each part such as a part can be secured. When the number of the perforated holes 70 in the corresponding part 71 of the groove opening 210 and the hole area in which the number of the perforated holes are gathered are set to increase as the distance from the air introduction part 22 increases, the body corresponding part 71a, the head The air blowing amount per unit area can be equalized in the corresponding portions 71 such as the portion corresponding portion 71b and the limb portion corresponding portions 71c and 71d. A well-balanced cool breeze can be delivered to each part of the occupant through the hole 70.
In addition, when the distance between the drill holes 70 becomes narrower as L1 to L5 and L6 to L9 as the distance from the air introduction part 22 increases, the airflow resistance increases as the distance increases, and the amount of air blown out from the drill hole 70 Since the space between the perforation holes 70 is narrowed, the air-conditioning air blowing amount converted per unit length at the foot corresponding portion 71c and the hand corresponding portion 71d can be leveled.

More specifically, the size of the placing slab 7 in plan view is made smaller than that in the plan view of the main portion 2, and the surface 1 a of the pad body 1 and the plate of the placing slab 7 are joined by joining the placing slab 7 to the main portion 2. When the hanging groove 11 for attaching the skin is formed with the thick wall 79, the low-cost seat pad P can be easily manufactured. There is no need to provide the bank 8 for forming the suspension groove 11 in the foaming mold 8. At the end of foam molding, the suspension groove 11 has not yet been completed, and there is no bank-like body that fits into the suspension groove 11 so that the demolding proceeds smoothly.
As described above, the vehicle seat pad and the manufacturing method thereof are extremely useful because they exhibit the various excellent effects described above.

  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, etc. of the pad main body 1, backing material 4, placing slab 7, foaming mold 8, etc. can be appropriately selected according to the application. In the embodiment, the seat pad P is applied to the cushion pad, but it can also be applied to the back pad.

1 Pad body 1a Surface (pad body surface)
1b Back side (pad body back side)
2 Main part 21 Air distribution groove 210 Groove opening 22 Air introduction part 4 Backing material 7 Place slab 70 Drilling hole 71 Corresponding part 8 Foaming mold 8a Lower mold (one division type)
8b ... Upper mold (other division type)
82 Raised portion 820 Top surface 821 Protruding portion P Seat pad (vehicle seat pad)
g Foaming raw material

Claims (5)

In a vehicle seat pad comprising: a pad body made of foam; and a backing material made of a non-woven fabric adhered and integrated on the back surface of the pad body.
An air distribution groove that is recessed in a cross-sectional concave shape from the surface of the pad body toward the back surface side, and is formed in a groove shape along the surface;
An air introduction portion formed through the bottom of the air distribution groove toward the back surface of the pad body;
A plate-like body having a density and hardness smaller than the density and hardness of the pad main body, the plate surface is bonded to the surface of the pad main body, and the groove opening is provided at a corresponding portion of the groove distribution hole. A vehicular seat pad, further comprising: a placing slab in which a plurality of perforations having a diameter smaller than the width are formed. 2. The vehicle according to claim 1, wherein the number of the perforated holes and the hole area in which the number of the perforated holes at the corresponding portion of the groove opening related to the air distribution groove are gathered tend to increase as the distance from the air introduction portion increases. Seat pad. The pad body is a cushion pad, and the placing slab is made of open-cell foam, and the size in plan view is smaller than the size in plan view of the main portion related to the cushion pad, to the main portion of the placing slab. The vehicle seat pad according to claim 1, wherein a hanging groove for attaching a skin is formed by the surface of the pad main body and the plate wall of the slab. This is a method for manufacturing a vehicle seat pad in which a pad main body, in which a backing material made of non-woven fabric is attached and integrated on the back surface after foam material is injected and the mold is closed after the backing material is set in the foam mold. And
On one side of the mold surface that molds the surface side of the pad main body, a raised portion for an air distribution groove that dents the surface is provided in a bank shape, and another part of the top surface of the raised portion is divided. Using a foaming mold with a protruding part for the air introduction part standing toward the mold, after foaming the pad body with the air distribution groove with the backing material attached and integrated, the pad body is removed by demolding take out,
A plate slab having a density and hardness smaller than the density and hardness of the pad main body, and a placing slab in which a plurality of perforated holes having a hole diameter smaller than the width of the groove opening related to the air distribution groove are formed, A method for manufacturing a vehicle seat pad, wherein a plurality of the perforated holes are arranged at corresponding portions of the pad body and adhered to the surface of the pad main body. The number of the drilled holes arranged in the corresponding part of the groove opening related to the air distribution groove and the hole area in which the number of the holes are gathered tend to increase as the corresponding part of the groove hole far from the air introduction part. The vehicle seat pad manufacturing method according to claim 4, wherein the placing slab is bonded to the surface of the pad main body.

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