CN110667446A

CN110667446A - Seat cushion for vehicle

Info

Publication number: CN110667446A
Application number: CN201911001456.9A
Authority: CN
Inventors: 坂诘贵志; 茂木学
Original assignee: Toyo Tyre Co
Current assignee: Toyo Quality One Corp
Priority date: 2015-11-30
Filing date: 2016-10-27
Publication date: 2020-01-10
Anticipated expiration: 2036-10-27
Also published as: JP6606414B2; CN106985716A; JP2017100518A; CN110667446B

Abstract

The technical problem is as follows: provided is a seat pad for a vehicle, which can suppress the diffusion of Volatile Organic Compounds (VOC). The solution is as follows: the pad body is formed with a hole portion having an open portion that opens to the outer surface (back surface). The hole portion is filled with a filler having elasticity, and the filler contains an adsorbent for VOC. The air between the inner surface of the inlet hole and the filler is brought into contact with the adsorbent, thereby trapping VOC by the adsorbent and discharging the air in which VOC is trapped from the open portion.

Description

Seat cushion for vehicle

The present application is a divisional application entitled seat cushion for a vehicle, having an application date of 2016, 10, 27, and an application number of 201610955318.4. Priority of Japanese prior application JP2015-233823 was claimed with a priority date of 2015, 11/30.

Technical Field

The present invention relates to a seat pad for a vehicle, and more particularly, to a seat pad for a vehicle capable of suppressing diffusion of volatile organic compounds.

Background

The seat pad for a vehicle may contain Volatile Organic Compounds (VOC) contained in the raw material or adsorb VOC in the atmosphere. Since VOCs are substances that contaminate the interior of a vehicle and cause headaches, dizziness, and the like, a cushion is required to prevent diffusion of residual VOCs or adsorbed VOCs. As a technique for suppressing the diffusion of VOC, a technique is known in which a back sheet made of an air-permeable material containing an adsorbent of a volatile organic compound is integrated with the back surface of a mat by integral molding (insert molding) or adhesion, and air in a vehicle interior and the mat is passed through the back sheet by compressing and decompressing the mat (patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2008-36048

Disclosure of Invention

Technical problem to be solved

However, in the above-described conventional technique, since the back sheet and the cushion are integrated by integral molding (insert molding) or bonding, there is a problem that impregnation of the raw material or the adhesive deteriorates the air permeability of the back sheet, and the ability to trap VOC of the adsorbent contained in the back sheet is lowered. Further, since the back sheet integrated with the mat is difficult to replace, there is a problem that the capacity of the adsorbent decreases with time as the adsorbent contained in the back sheet traps VOC.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a seat pad for a vehicle that prevents a decrease in the ability of an adsorbent to capture VOCs and can suppress the diffusion of Volatile Organic Compounds (VOCs).

(II) technical scheme

In order to achieve the object, according to a seat cushion for a vehicle of a first aspect, a hole portion is formed in a cushion main body, and the hole portion includes an open portion that is open to an outer surface. Since the hole portion is filled with the elastic filler containing the Volatile Organic Compound (VOC) adsorbent, the adsorbent can be brought into contact with air between the inner surface of the entry hole portion and the filler, and the VOC can be trapped by the adsorbent. Since the air with the trapped VOC is discharged from the open portion, the VOC diffusion can be suppressed.

Since the filler is detachably filled in the hole portion, when the adsorbent capacity is lowered by capturing VOC, the filler can be removed and replaced with a new filler. Since the ability of the adsorbent to trap VOC can be maintained by replacing the filler, the ability of the adsorbent to trap VOC can be prevented from decreasing with time.

According to the seat pad for a vehicle of the second aspect, since the open portion is formed on the back surface on the opposite side of the surface of the pad main body facing the occupant seated normally, the pad main body can be elastically deformed by the load of the occupant, and air can be moved to the open portion formed on the back surface of the pad main body. Since the amount of air that contacts the filler can be ensured, the adsorbent can have an effect of ensuring the ability of capturing VOC in addition to the effect of the first aspect.

According to the seat pad for a vehicle of the third aspect, since the bottom portion of the pad main body closes the hole portion between the back surface and the front surface of the pad main body, air can be pushed out from the bottom portion to the open portion with the elasticity of the pad main body. Since the air pushed out from the bottom can be brought into contact with the filler, there is an effect that the VOC remaining in the cushion body can be easily trapped by the adsorbent, in addition to the effect of the second aspect.

According to the seat cushion for a vehicle of the fourth aspect, since the filler has air permeability, not only the air is brought into contact with the outer surface of the filler and the VOC is trapped by the adsorbent present on the outer surface of the filler, but also the air is brought into contact with the inside of the filler and the VOC is trapped by the adsorbent present inside the filler. Therefore, in addition to the effects of any one of the first to third aspects, there is an effect that the ability of the adsorbent contained in the filler to capture VOC can be improved.

According to the seat pad for a vehicle of the fifth aspect, since at least a part of the open portion is covered with the lid portion, in addition to the effect of any one of the first aspect to the third aspect, there is an effect that the filler filled in the hole portion can be prevented from falling off by the lid portion.

According to the seat pad for a vehicle of the sixth aspect, in the pad main body, since the narrowed portion has a cross section perpendicular to the depth direction of the hole portion that gradually decreases as it goes toward the open portion, the narrowed portion has an effect of making the filler filled in the hole portion less likely to fall off, in addition to the effect of any one of the first to third aspects.

According to the seat pad for a vehicle of the seventh aspect, since the pad body is provided with the open portion at a position avoiding the spring member disposed on the frame, the filler can be replaced without interfering with the spring member. Therefore, in addition to the effect of any one of the first to third aspects, there is an effect that the filler can be easily replaced.

According to the seat pad for a vehicle of the eighth aspect, the pad main body is formed with the hole portion at a position that supports any one of the buttocks, thighs, and torso of the occupant seated normally. Since the amount of air entering the hole portion can be secured by the movement of the occupant load, there is an effect that the VOC in the air can be easily trapped by the adsorbent in addition to the effect of any of the first to third aspects.

According to the seat pad for a vehicle of the ninth aspect, since the cover portion projects a part of the pad main body in the flange shape from the edge of the open portion toward the center of the hole portion, there is an effect that it is not necessary to prepare a cover portion as a separate member from the pad main body in addition to the effect of the fifth aspect. Since the broken portion that divides the cover portion in the circumferential direction is formed, there is also an effect that the cover portion can be easily elastically deformed so that the cover portion is not broken when the molded cushion body is released from the molding die.

According to the seat pad for a vehicle of the tenth aspect, the filler material is solid cotton (solid ) having lower rigidity than the pad main body. Therefore, the feeling of pressure on the sitting occupant can be suppressed, and there is an effect that the comfort level can be adjusted in addition to the effect of any one of the first to third aspects.

Drawings

Fig. 1 is a plan view of a seat pad for a vehicle of a first embodiment.

Fig. 2 is a sectional view of the seat pad for a vehicle taken along line ii-ii of fig. 1.

Fig. 3 is a top view of the frame.

Fig. 4 is a sectional view of the vehicle seat.

Fig. 5 is a plan view of the seat pad for a vehicle in the second embodiment.

Fig. 6 is a sectional view of the seat pad for a vehicle taken along line vi-vi of fig. 5.

Fig. 7 is a plan view of the seat pad for a vehicle in the third embodiment.

Fig. 8 is a sectional view of the seat pad for a vehicle taken along line viii-viii of fig. 7.

Fig. 9 is a plan view of a seat pad for a vehicle in a fourth embodiment.

Fig. 10 is a sectional view of the seat pad for a vehicle taken along the line of arrow X-X of fig. 9.

FIG. 11 is a cross-sectional view of the seat pad for the vehicle taken along the line of arrows XI-XI in FIG. 10.

Description of the reference numerals

10. 50, 60, 70 vehicle seat pad

11 cushion body

12 surface (outer part)

13 Back (part of the outer surface)

14 hole part

15. 62, 63 open part

16 bottom

20. 64 filling material

30 frame

35 spring component

36 passenger

42. 71 cover part

61 hole part (narrow part)

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a plan view of a seat pad 10 for a vehicle (hereinafter referred to as a "seat pad") of a first embodiment. The seat cushion 10 is a member that reduces the lateral vibration during driving while reducing the vibration from the road surface, and is provided on a vehicle body (not shown). The seat cushion 10 is a base material of a seat back or a seat part of a vehicle seat, and a cushion body 11 is formed of a foam made of a synthetic resin such as a soft urethane foam. In the present embodiment, a seat cushion 10 (cushion pad) serving as a seat portion is illustrated. The cushion body 11 is a member for supporting an occupant, and has filler 20 embedded in both right and left positions.

Fig. 2 is a sectional view of the seat pad (seat cushion) 10 for the vehicle taken along line ii-ii of fig. 1. The seat cushion 10 includes a cushion body 11 surrounded by a front surface 12 facing a normally seated passenger (not shown) and a rear surface 13 located inside the front surface 12, and a bottom hole portion 14 is formed in the rear surface 13 of the cushion body 11. The hole 14 includes an open portion 15 that opens toward the back surface 13, and a bottom portion 16 that closes the hole 14 between the front surface 12 and the back surface 13. In the present embodiment, the opening 15 is formed in a circular shape having a diameter of about 5cm, but the size and shape of the opening 15 may be appropriately set.

A protrusion corresponding to a molding die for foam molding the pad main body 11 is provided, so that the hole portion 14 can be formed by the protrusion while molding the pad main body 11. In this case, the inner surface of the molded hole 14 is cut, and the Skin layer (Skin layer) generated during molding is cut off, whereby a cut surface can be formed on the inner surface of the hole 14. Alternatively, the hole 14 may be formed by drilling after the cushion body 11 is foam-molded. When the hole 14 is formed by drilling (cutting) the foam-molded pad body 11, the skin layer can be made not to exist on the inner surface (cut surface) of the hole 14.

The seat cushion 10 is provided with a back surface material 17 on the back surface 13 of the cushion main body 11. The back material 17 is a member for preventing the pad body 11 from directly contacting a frame (not shown) on the vehicle body side, and is made of woven fabric, nonwoven fabric, felt, or the like. After the cushion body 11 is foam-molded, the back material 17 may be integrated with the cushion body 11 by adhesion. Alternatively, it may be integrally formed with the cushion body 11 by insert molding. The back sheet 17 is formed with a cut-out portion 18 which is cut out slightly larger than the opening portion 15 of the hole portion 14 formed in the pad body 11. Since the cut-out portion 18 is formed, even if the back surface 13 of the pad main body 11 is covered with the back surface material 17, the open portion 15 can be exposed from the cut-out portion 18.

The pad body 11 is detachably filled with a filler 20 in the hole 14. The packing material 20 is a member having elasticity, and contains an adsorbent for trapping Volatile Organic Compounds (VOC). The filler 20 is formed of a foam or a three-dimensional mesh. The filler material 20 may be appropriately set in hardness with respect to the cushion body 11. By making the filler 20 have the same hardness as the cushion body 11, the uncomfortable feeling caused by the filler 20 being embedded in the cushion body 11 can be reduced. By making the filler 20 harder than the cushion body 11, the comfort when sitting is ensured, and the rigidity of the seat cushion 10 is improved, so that the feeling of stability can be improved. By making the filler 20 softer than the cushion body 11, the feeling of pressure by the cushion body 11 can be reduced.

The foam is a soft synthetic resin foam having open cells or closed cells, and examples thereof include recyclable materials such as recycled polyurethane (チップウレタン) (obtained by crushing a tail of the foam, mixing an adhesive, and compression-molding the mixture under steam), plate-like polyurethane (obtained by cutting a molded foam), and mold polyurethane (obtained by foam-molding the foam using a dedicated molding die). Since the foam has open cells or closed cells, the adsorbent can be supported on the inner surface of the cells. Among them, a foam having open cells is preferably used. This is because the air permeability can be obtained by the open cells, and the specific surface area can be increased, so that the amount of the adsorbent to be supported can be increased, and the VOC contained in the gas passing through the filler 20 can be adsorbed.

The three-dimensional net body is a three-dimensional structure formed of a plurality of fibers three-dimensionally interlaced with each other. The three-dimensional net body is made of thermoplastic elastomer such as thermoplastic polyester elastomer or thermoplastic polyurethane elastomer, and fiber such as cotton, wool, rayon, nylon, and polyester, and has air permeability and elasticity. As means for interlacing the fibers, means for felting the fibers by adding any one or more of steam, heat, and pressure, means for mechanically interlacing the fibers with each other such as a needle punching method, means for bonding the fibers to each other by pressure bonding using various adhesives, means for bonding the fibers to each other by dissolving the fibers themselves by hot pressing, and the like are used. Examples of the three-dimensional net body include solid cotton and brehatair (ブレスエアー) (registered trademark).

Solid cotton is preferably used as the three-dimensional net body. The solid cotton is obtained by bonding short fibers of synthetic fibers or natural fibers forming a main body. Examples of the bonding treatment include a thermal bonding method using Binder fibers (Binder fibers) and a resin bonding method using an emulsion adhesive. This is because solid cotton is bonded to short fibers, and therefore a large specific surface area and air permeability can be ensured, and the amount of the adsorbent per unit volume can be made larger than that of the foam. In the present embodiment, the filler 20 is formed of solid cotton having lower rigidity (less elastic stretchability) than the cushion body 11.

The adsorbent is not particularly limited as long as it can adsorb VOC. An adsorbent that adsorbs and decomposes VOCs may be used. Examples of the adsorbent include amines, imines, amidines, and the like, and particularly preferred are adsorbents having divalent iron, a chelating agent, and an amino group which causes a schiff reaction. In addition to the adsorbent for VOCs, the packing material 20 may also contain a substance that adsorbs or adsorbs and decomposes odor components other than VOCs.

Examples of the method of containing the adsorbent in the filler 20 include a method of applying the adsorbent to the filler 20 or immersing the filler 20 in an adsorbent solution. The filler 20 may be formed of fibers or the like to which an adsorbent is attached in advance by impregnation or the like.

The relationship between the seat cushion 10 and the frame 30 will be described with reference to fig. 3 and 4. Fig. 3 is a top view of the frame 30. Fig. 3 shows the seat cushion 10 supported by the frame 30 and the occupant 36 seated normally, by a broken line diagram. The frame 30 is a member provided in a vehicle body (not shown), and supports the seat cushion 10.

As shown in fig. 3, the frame 30 includes: a pair of left and right lateral frames 31 arranged with the longitudinal direction (vertical direction in fig. 3) of the vehicle body as the longitudinal direction, a front frame 32 connecting the front end sides of the lateral frames 31 to each other in the vehicle width direction (horizontal direction in fig. 3), and a rod 33 connecting the rear end sides of the lateral frames 31 to each other in the vehicle width direction. The lateral frame 31 tiltably supports a rear frame 34 to which a back pad 37 (see fig. 4) supporting the trunk (back) of an occupant 36 is attached. The frame 30 is provided with a plurality of spring members 35 stretched between the front frame 32 and the rod 33. The spring members 35 are formed in a square wave shape that repeats an S-shape in the front-rear direction of the vehicle body, and gaps are provided between the adjacent spring members 35 in the vehicle width direction, and the front ends thereof are fixed to the front frame 32 and the rear ends thereof are fixed to the rods 33. The spring member 35 is disposed avoiding the position of the filler 20 (the open portion 15) of the seat cushion 10. The filler 20 is disposed at a portion (a portion of the cushion body 11 pressed by the buttocks or the thighs) that supports the buttocks or the thighs of the passenger 36.

Fig. 4 is a sectional view of the vehicle seat 40 in the front-rear direction of the vehicle body (not shown). As shown in fig. 4, the vehicle seat 40 includes: a frame 30, and a seat cushion 10 having a surface 12 (see fig. 2) of the cushion body 11 covered with a skin material 41. The vehicle seat 40 has a lid portion 42 interposed between the back material 17 integrated with the pad body 11 and the spring member 35. The cover 42 is a member having air permeability, and is made of a nonwoven fabric in the present embodiment. The cover 42 is formed in a sheet shape larger than the opening 25 so as to cover the opening 15 (see fig. 2) in order to prevent the filler 20 filled in the hole 14 from falling off. Since the cover portion 42 is sandwiched between the back material 17 integrated with the pad main body 11 and the spring member 35, the cover portion 42 can be prevented from falling from the vehicle seat 40.

As described above, in the seat cushion 10, the pad main body 11 is formed with the hole portion 14, and the hole portion 14 includes the open portion 15 that is open on the back surface 13. Since the filling material 20 having elasticity is filled in the hole portion 14 and the filling material 20 contains the adsorbent of VOC, the adsorbent can be brought into contact with air between the inner surface of the entry hole portion 14 and the filling material 20, and the VOC can be trapped by the adsorbent. Since the air in which the VOC is trapped is discharged from the open portion 15, the VOC diffusion can be suppressed.

Since the filler 20 is detachably filled in the hole portion 14, when the adsorbent capacity is lowered by capturing VOC, the cover 42 is moved to expose the open portion 15, and the filler 20 can be removed and replaced with a new filler 20. Since the ability to trap VOC can be maintained by replacing the filler 20, the ability of the adsorbent to trap VOC can be prevented from decreasing with time. The filler 20 may be replaced at the time of vehicle inspection or the like.

Since the filler 20 has a thickness from the back surface 13 of the pad body 11 to the bottom portion 16, a path through which air entering between the inner surface of the hole 14 and the filler 20 comes into contact with the filler 20 can be secured. If the path of contact with the filler 20 can be extended, the probability of contact between the VOC contained in the air and the adsorbent contained in the filler 20 can be increased, and therefore the effect of adsorbing VOC by the adsorbent can be ensured.

Since the open portion 15 is formed on the back surface 13 of the cushion body 11, the cushion body 11 can be elastically deformed by the load of the occupant 36, and the air in the vehicle interior and the cushion body 11 can be moved through the open portion 15 formed on the back surface 13 of the cushion body 11 by the compression and restoration of the cushion body 11. Since the amount of air in contact with the filler 20 can be ensured, the ability of the adsorbent to capture VOC can be ensured.

Since the bottom portion 16 of the cushion body 11 closes the hole portion 14 between the back surface 13 and the front surface 12 of the cushion body 11, air can be pushed out from the bottom portion 16 to the open portion 15 by the elasticity of the cushion body 11. Since the air pushed out from the bottom portion 16 can be brought into contact with the filler 20, VOC remaining in the cushion body 11 (VOC from the raw material of the cushion body 11) can be easily trapped by the adsorbent.

If the inner surfaces of the holes 14 (the inner peripheral surfaces of the holes 14 and the bottoms 16) are cut surfaces, the amount of air that is pushed out from the mat main body 11 to the open portions 15 through the holes 14 can be increased compared to the case where the inner surfaces of the holes 14 have a skin layer. As a result, air containing VOC (VOC derived from the raw material of the mat body 11) remaining in the mat body 11 is pushed out toward the filler 20 from the inner surface of the hole 14, and the VOC can be easily trapped by the adsorbent.

Since the packing material 20 has air permeability, the VOC is trapped by the adsorbent present inside the packing material 20 by passing air through the thickness direction of the packing material 20, as well as by contacting air with the outer surface of the packing material 20 and trapping the VOC by the adsorbent present on the outer surface of the packing material 20. Since the specific surface area of the filler 20 can be increased, the capacity of the adsorbent contained in the filler 20 to trap VOC can be improved.

In the seat cushion 10 provided on the frame 30, the cover 42 having air permeability covers the open portion 15, so that the filler 20 filled in the hole portion 14 does not fall off. Since the cover 42 is sandwiched between the spring members 35 of the frame 30 and the pad main body 11, the cover 42 can be prevented from falling off by the spring members 35. When the cover 42 is moved, the opening 15 can be exposed, and therefore, the filler 20 can be easily replaced. The cover portion 42 may be moved after the filling material 20 is replaced, thereby closing the open portion 15.

Since the pad main body 11 is provided with the open portion 15 avoiding the position of the spring members 35 disposed on the frame 30, the filler 20 can be replaced without interfering with the spring members 35 in a state where the seat cushion 10 is attached to the frame 30. Since the seat cushion 10 does not need to be removed from the frame 30 when replacing the filler 20, the replacement work of the filler 20 can be easily performed. By replacing the filler 20, not only VOC (VOC derived from the raw material of the cushion body 11) remaining in the cushion body 11 but also VOC adsorbed after the cushion body 11 is attached to a vehicle body (not shown) can be captured and prevented from diffusing into the vehicle.

Since the pad body 11 has the hole portions 14 formed at positions for supporting the buttocks or thighs of the occupant 36 seated normally, the air is moved by the movement of the load of the occupant 36, and the amount of air entering the hole portions 14 can be secured. Therefore, the VOC in the air can be easily trapped by the adsorbent. Since the packing material 20 is made of solid cotton, the capacity and air permeability per unit volume of the adsorbent are ensured, and the adsorption capacity of VOC can be improved. Since the filler 20 is formed of solid cotton having a lower rigidity than the cushion body 11, the feeling of pressure applied to the occupant 36 can be suppressed, and the comfort can be adjusted.

Next, a second embodiment will be described with reference to fig. 5 and 6. In the first embodiment, a case where the bottom portion 16 completely closes the hole portion 14 formed in the back surface 13 of the pad main body 11 is described. In contrast, in the second embodiment, a case where the bottom portion 16 closes a part of the hole portion 14 will be described. Note that the same portions as those of the first embodiment are denoted by the same reference numerals, and the following description is omitted. Fig. 5 is a plan view of a seat pad (cushion) 50 for a vehicle of the second embodiment, and fig. 6 is a sectional view of the seat pad (cushion) 50 for a vehicle taken along line vi-vi of fig. 5.

As shown in fig. 5, the cushion 50 has a communication path 51 formed in the cushion body 11. As shown in fig. 6, the communication path 51 is a hole penetrating the pad body 11 from the surface 12 of the pad body 11 to the bottom 16 of the hole portion 14. The thickness of the communication path 51 is set smaller than the size of the bottom portion 16. In the present embodiment, the communication path 51 is formed in a circular shape in cross section and is formed to have a uniform thickness in the thickness direction of the pad main body 11. Since the communication path 51 having a cross-sectional area smaller than that of the bottom portion 16 is formed in the bottom portion 16, a part of the hole portion 14 is opened on the surface 12 through the communication path 51, and the bottom portion 16 closes a part of the hole portion 14.

In the seat cushion 50, the surface 12 and the holes 14 communicate with each other through the communication path 51, and therefore, air can be made to flow from the surface 12 to the holes 14 or from the holes 14 to the surface 12. Compared to the seat cushion 10 of the first embodiment, since air can be easily circulated to the holes 14 through the communication passages 51, the probability of contact between VOC contained in the air and the adsorbent contained in the filler 20 can be increased. Therefore, the effect of the adsorbent to adsorb VOC can be improved.

Since the opening area of the surface 12 is smaller than the area of the bottom portion 16, the communication path 51 can make the occupant 36 less likely to feel uncomfortable. Since the cross-sectional area of the communication path 51 is smaller than the area of the bottom portion 16, the amount of air that can be pushed out from the bottom portion 16 to the open portion 15 by the elasticity of the pad body 11 can be secured. Therefore, the comfort of the occupant 36 and the effect of the adsorbent in capturing VOC can be simultaneously achieved.

Next, a third embodiment will be described with reference to fig. 7 and 8. In the first and second embodiments, the case where the hole 14 has the bottom portion 16 is described. In contrast, in the third embodiment, a case where the hole portion 61 penetrates in the thickness direction of the pad main body 11 will be described. Note that the same portions as those of the first embodiment are denoted by the same reference numerals, and the following description is omitted. Fig. 7 is a plan view of a seat cushion (seat cushion) 60 for a vehicle of the third embodiment, and fig. 8 is a sectional view of the seat cushion (seat cushion) 60 for a vehicle taken along line viii-viii of fig. 7.

As shown in fig. 7 and 8, the seat cushion 60 has a hole 61 penetrating from the front surface 12 to the back surface 13 of the cushion body 11 in the thickness direction, and the hole 61 is filled with a filler 64. In the present embodiment, the hole portions 61 are formed in both the front and rear portions of the pad body 11, and the filler 64 is made of solid cotton having a rigidity lower than that of the pad body 11 (having a small elastic stretchability). The packing material 64 contains an adsorbent for VOCs.

The hole 61 includes an opening 62 that opens to the front surface 12 of the pad body 11 and an opening 63 that opens to the back surface 13. Since the area of the opening 63 is set smaller than the area of the opening 62, a narrow portion is formed in the inner circumferential surface of the hole 61, the cross-sectional shape of which perpendicular to the depth direction of the hole 61 gradually decreases toward the opening 63. The filler 64 filled in the hole 61 is formed in a truncated cone shape corresponding to the shape of the hole 61. When the seat cushion 60 is mounted to the vehicle body, the surface 12 of the cushion main body 11 is covered with a skin material (not shown), and therefore the filler 64 filled in the hole 61 can be prevented from falling off from the open portion 62 by the skin material. When the seat cushion 60 is mounted to the vehicle body, the open portion 63 is covered with a cover portion (not shown) having air permeability.

In the seat cushion 60, the hole 61 penetrates the cushion main body 11 in the thickness direction, and therefore the volume of the filler 64 filled in the hole 61 can be increased compared to the seat cushions 10 and 50 in the first and second embodiments. If the volume of the filler 64 can be increased, the amount of the adsorbent contained in the filler 64 can be increased, and the amount of VOC adsorbed by the filler 64 (adsorbent) can be increased.

Since the pad main body 11 is formed with the hole portion 61 (narrow portion), the filler 64 can be made less likely to fall off from the opening 63 of the back surface 13 of the pad main body 11. The filling material 64 can be replaced by using the elasticity of the cushion body 11 and the filling material 64.

The fillers 64 are disposed at two positions in front and rear of the cushion body 11, and the fillers 64 disposed at the front are located at the positions where the thighs of the occupant 36 are supported. Since the filler 64 has lower rigidity (less elastic stretchability) than the cushion body 11, the brake pedal or the accelerator pedal can be easily depressed even if the foot force of the occupant 36 is insufficient. Therefore, the feeling of fatigue of the occupant 36 during long-time driving can be reduced.

A fourth embodiment will be described with reference to fig. 9 to 11. In the first to third embodiments, the case where the cover 42 is provided as a separate member from the pad main body 11 is explained. In contrast, in the fourth embodiment, the seat pad 70 for a vehicle in which the pad main body 11 and the cover 71 are integrated is described. Note that the same portions as those described in the first embodiment are denoted by the same reference numerals, and the following description is omitted. Fig. 9 is a plan view of a seat cushion (seat cushion) 70 for a vehicle of the fourth embodiment, fig. 10 is a sectional view of the seat cushion 70 taken along the line of arrows X-X in fig. 9, and fig. 11 is a sectional view of the seat cushion 70 taken along the line of arrows xi-xi in fig. 10. In fig. 10 and 11, the filler 20 is not shown.

As shown in fig. 9, the seat cushion 70 is provided with a cover 71 in the hole portion 14 formed in the cushion main body 11. As shown in fig. 10, the cover 71 is a portion protruding in a flange shape from the periphery of the hole 14 (the edge of the open portion 15) toward the center of the hole 14, and is formed integrally with the pad body 11. The edge of the cut-out portion 18 of the back surface material 17 is disposed at the root of the cover 71. As shown in fig. 11, the cover portion 71 is formed in a fan shape that divides the inner periphery of the hole portion 14 into two parts, and is formed with breaks 72 at two circumferentially adjacent positions.

Since the seat cushion 70 is formed with the cover 71 covering a part (inner edge) of the open portion 15, the area of the open portion 15 can be made smaller than the cross-sectional area of the hole portion 14 by the amount corresponding to the protrusion of the cover 71. As a result, the filler 20 filled in the hole 14 can be prevented from falling off by the lid 71. Since the cover 71 has the same elasticity as the cushion body 11, the work of attaching and detaching the packing material 20 can be facilitated by the elasticity of the cover 71.

Since the cover portion 71 is formed integrally with the cushion body 11, it is possible to eliminate the need to prepare a cover material (cover portion) as a separate component separate from the cushion body 11, and thus the number of components can be reduced. In addition, since the work of fixing the cover material (cover) as a separate member to the cushion body 11 can be eliminated, the work of assembling the seat cushion 70 can be simplified.

Since the back material 17 is disposed at the root of the cover 71, the strength of the cover 71 can be increased. The lid 71 is not easily deformed, so that the filler 20 filled in the hole 14 does not fall. Since the lid portion 71 is formed with the cut-off portion 72, the lid portion 71 can be easily elastically deformed so that the lid portion 71 is not broken when the molded pad main body 11 is taken out from the molding die (not shown).

The present invention has been described above based on the embodiments, but it can be easily estimated that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, the number and positions of the holes 14 and 61 may be set as appropriate.

In the above embodiments, the description has been given of the case where the

vehicle seat pads

10, 50, and 60 are cushion pads on which the occupant 36 sits, but the present invention is not limited to this. Of course, the

seat pads

10, 50, 60 for a vehicle may be applied to a back pad that supports the back of the occupant 36. In the case of a back cushion, VOC can of course also be captured by providing a filler material. Even when the

seat pads

10, 50, and 60 are back pads, the filler can be disposed at positions avoiding the spring members (not shown) attached to the rear frame 34 (see fig. 4). Even when the

seat pads

10, 50, and 60 are back pads, the hole portions 14 and 61 are preferably formed at positions that support the trunk of the normally seated passenger 36. This is because the cushion body 11 is compressed and restored by the movement of the load of the occupant 36, and the air volume of the inlet holes 14 and 61 is secured.

In the first embodiment, the case where the cover 42 is fixed by being sandwiched between the spring member 35 and the pad main body 11 has been described, but the present invention is not limited to this. Other means of securing the cover 42 may of course be used. As another means, for example, there is a means in which a locking piece for locking the cover 42 to the pad body 11 or the back material 17 is provided, and the cover 42 is fixed by the locking piece. Examples of the locking piece include hook-and-loop fasteners, snaps, and buttons. When the locking member is provided, the size of the lid 42 may be the size of the opening 15, and may have a margin for attaching the locking member. If the cover is substantially of a size that can be fixed while avoiding the position of the spring member 35, the cover can be easily removed when replacing the filler 20.

In the first embodiment, the case where the cover portion is formed of a nonwoven fabric having air permeability has been described, but the present invention is not limited to this. It is needless to say that the cover portion may be formed of a woven fabric or a net having air permeability instead of the nonwoven fabric. In addition, when a band-shaped member having a width smaller than the width of the opening portion 15 is used for the cover portion, the cover portion does not need to be air-permeable. This is because, when the width of the cap portion is narrower than the filling material 20, the filling material 20 will be brought into contact with the outside air without shielding the cap portion.

In the second embodiment, the case where the communication path 51 is formed in a circular shape having a uniform thickness in cross section has been described, but the present invention is not limited to this. Since the communication passage 51 is used to allow air to flow through the hole 14, the thickness and shape of the communication passage 51 can be appropriately set.

In the third embodiment, the case where the inner peripheral surface of the hole 61 penetrating the pad main body 11 is formed in a tapered shape (narrow portion) has been described, but the present invention is not limited to this. For example, it is needless to say that the narrowed portion may be provided by forming the hole portion 14 of the seat cushions 10 and 50 in the first and second embodiments to have a tapered shape gradually decreasing toward the open portion 15. When the hole 14 is provided with the narrow portion, the filler 20 is formed in a truncated cone shape corresponding to the shape of the hole 14.

In the third embodiment, the case where the inner peripheral surface of the hole 61 penetrating the pad main body 11 is tapered in the thickness direction of the entire pad main body 11 has been described, but the present invention is not limited to this. Of course, a recess or a projection may be provided in a part of the inner peripheral surface of the hole, and a local narrow portion may be provided in the hole by the recess or the projection. When a part of the hole portion is provided with a narrow portion such as a recess or a projection, the filler is provided with an uneven portion corresponding to the recess or the projection formed in the part of the hole portion. Since the narrow portion of the hole portion engages with the concave-convex portion of the filler, the filler can be made less likely to fall off.

In the fourth embodiment, the lid 71 having the break 72 formed at two positions in the circumferential direction of the open portion 15 has been described, but the present invention is not limited to this. The number or size of the breaks 72 may be appropriately set according to the shape or size of the open portion 15. Further, if the number of the cut portions 72 is 1 or more, the lid portion 71 can be made less likely to be broken when the pad main body 11 is taken out from the mold.

Claims

1. A seat pad for a vehicle supported by a frame, comprising a pad body, a filler, and a cover,

the pad body is provided with a hole part with an opening part which is opened at the outer surface;

the filling material has elasticity and is filled in the hole part of the cushion main body in a detachable mode;

the cover portion covers at least a portion of the open portion,

the cover portion is formed by protruding a part of the pad main body from the edge of the open portion toward the center of the hole portion in a flange shape,

and a break is formed to divide the cover portion in the circumferential direction,

the packing material contains an adsorbent for volatile organic compounds.

2. The seat pad for a vehicle as recited in claim 1, wherein the open portion is formed on a back surface on an opposite side of a surface of the pad main body facing a normally seated occupant.

3. The seat pad for a vehicle as recited in claim 2, wherein the pad body is provided with a bottom portion that closes the hole portion between a back surface and a front surface of the pad body.

4. The seat pad for a vehicle as recited in any one of claims 1 to 3, wherein the filler material has air permeability.

5. A seat pad for a vehicle as defined in any one of claims 1 to 3, wherein the pad main body is provided with a narrow portion whose cross section perpendicular to the depth direction of the hole portion becomes gradually smaller toward the open portion.

6. A seat pad for a vehicle as defined in any one of claims 1 to 3, wherein the open portion in the pad main body is provided avoiding a position of a spring member disposed on the frame.

7. A seat pad for a vehicle as defined in any one of claims 1 to 3, wherein the hole portion in the pad main body is formed at a position to support any one of thighs and a trunk of a normally seated occupant.

8. The seat pad for the vehicle as recited in any one of claims 1 to 3, wherein the filler material is solid cotton having a rigidity lower than that of the pad main body.