JP5959812B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  In vehicle seats, including automobile seats, through holes and grooves are provided in urethane pads to reduce the stuffiness when occupants are cooled and heated, and forced by a blower attached outside. It is known to improve comfort by supplying cold air or warm air to the seating surface or ventilating air with increased humidity or temperature by creating an air flow (see Patent Document 1 below) , 2). However, in such a conventional technique, it is necessary to separately provide a blower or the like in order to supply air to the seat. Moreover, also about a urethane pad, in order to cover the groove | channel provided in the pad surface, it is necessary to affix slab urethane etc. by post-pasting. For this reason, all of them lead to high costs and can be mounted only on high-grade vehicles.

  By the way, in Patent Document 3 below, a pad-like cushion body made of polyurethane foam is provided with a three-dimensional three-dimensional reticulated cushion body made of a fiber material that has a certain elasticity and can be ventilated in the thickness direction and the plane direction. It is disclosed that the air passage is disposed on the surface of the seating portion so as to cover the air passage. Further, in Patent Document 4 below, a reticulated cushion body made of a three-dimensional reticulated structure in which a large number of continuous linear bodies made of a thermoplastic resin are respectively wound in a loop shape and their contact portions are fused, It is disclosed to be incorporated into a seating portion of a pad body. Such a three-dimensional reticulated cushion body is a breathable member having superior breathability as compared with the polyurethane foam constituting the pad main body. However, these conventional techniques still force air to be circulated from the back side of the pad by a blower or the like, and have not yet solved the high cost problem. Moreover, in these prior arts, the air flow in a vehicle interior is not made using the air flow in the vehicle interior, and the bent air-permeable member cannot be fully utilized.

JP 2007-236607 A JP 2005-095343 A JP 2009-077770 A JP 2004-073429 A

  The present invention has been made in view of the above points, and facilitates the flow of air in the seat by using the flow of air in the passenger compartment, thereby facilitating the discharge of temperature and humidity that tend to be trapped in the seat. An object of the present invention is to provide a vehicle seat that can reduce the stuffiness during sitting at low cost.

  The vehicle seat according to the present invention is composed of a polyurethane worm foam molded body, a pad main body in which a housing recess is provided on a pad surface at a lower thigh in a seating portion, and a three-dimensional mesh cushion body formed of a fiber material. A breathable member disposed in the recess; and a breathable seat cover that covers a surface of the pad main body and the breathable member. The pad main body penetrates the pad main body and the inside of the housing recess and the pad. A vent hole is provided to communicate with the back surface side, and the receiving recess is provided to be openable to the front edge of the pad main body so as to be able to take in air from the front of the pad main body.

According to the first aspect of the present invention, in the vehicle seat, the breathable member is provided so as to cover the front edge of the pad main body, and is further extended downward so that the front surface portion of the pad main body is moved up and down. A longitudinal wall portion of the breathable member extending in the direction is formed.
According to a second aspect of the present invention, in the vehicle seat, the housing recess is provided apart from the front edge of the pad body, and an air flow path is provided to connect the housing recess and the front edge of the pad body. The housing recess is opened by the air flow path so as to allow ventilation with respect to the front edge of the pad body, and the air flow path extends downward at the front edge of the pad body. An extension groove portion extending in the vertical direction on the front surface portion is provided.

According to a third aspect of the present invention, the vehicle seat further includes a support frame that is disposed below the pad main body and supports the pad main body, and the support frame includes a lower surface of a front side portion of the pad main body. A front receiving surface portion for receiving, and a spring portion provided behind the front receiving surface portion and elastically supporting the lower surface of the rear portion of the pad body by a plurality of springs, and the pad back surface of the lower thigh A back surface side recess is provided on the side, the back surface side recess extends beyond the rear end of the front receiving surface portion to the rear spring portion, and the vent hole opens in the back surface side recess on the pad back surface side It is characterized by being provided.

The invention according to claim 4 is characterized in that, in the vehicle seat, the vent hole is provided so as to extend obliquely rearward from the housing recess toward the pad back surface side.

  According to a preferred embodiment of the present invention, the seat cover may be formed to have higher air permeability than the other portions in the front side portion covering the front edge of the pad main body.

  According to the present invention, since the breathable member made of the three-dimensional mesh cushion is disposed in the housing recess provided on the pad surface, a ventilation space in which air flows is formed between the pad main body and the seat cover. In particular, in the present invention, since the housing recess for housing the air permeable member is opened so as to be able to vent the front edge of the pad main body so that air from the front of the seat can be taken in, the wind from the front blown from the air conditioner or the like can be obtained. Can be easily taken into the housing recess, and the air flow can be created by letting it escape from the breathable member to the back side of the pad through the vent hole. In this way, the air flow in the passenger compartment can be used to facilitate the flow of air in the seat. Steaming at the time can be reduced.

Sectional drawing of the vehicle seat which concerns on 1st Embodiment. A perspective view of a pad body and a breathable member constituting the vehicle seat A plan view of the pad body and the breathable member in an assembled state Bottom view of the pad body VV sectional view of FIG. Sectional view taken along line VI-VI in FIG. Perspective view of support frame Sectional drawing in the assembly state of the pad main body and breathable member which concern on 2nd Embodiment Sectional drawing of the vehicle seat which concerns on 3rd Embodiment. Sectional drawing in the assembly state of the pad main body and breathable member of 3rd Embodiment. The top view about the assembly | attachment state shown by FIG. Sectional drawing in the assembly state of the pad main body and breathable member which concern on 4th Embodiment Sectional drawing of the vehicle seat which concerns on 5th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
The vehicle seat 10 according to the first embodiment will be described with reference to FIGS. The vehicle seat 10 is a front seat of an automobile, and includes a pad main body 12 made of a foamed molded product of flexible polyurethane foam, a breathable member 14 made of a three-dimensional mesh cushion formed of a fiber material, and an air vent. The sheet cover 16 having a property and a metal support frame 18 are provided. Actually, the vehicle seat 10 is further provided with a backrest portion (not shown).

  The pad main body 12 is a seat cushion pad for supporting the buttocks of the occupant who is a seated person, and as shown in FIGS. 20 and side portions 22 and 22 which are formed in a bulging shape upward on both the left and right sides and support the occupant from the left and right and hold the seating posture. The seating portion 20 includes a rear lower half 24 that receives and supports the occupant's buttocks, and a front lower half 26 that receives and supports the occupant's thigh.

  In order to lock the seat cover 16 on the pad surface, that is, the upper surface of the pad body 12, a pair of left and right vertical suspension grooves 28, 28 extending in the front-rear direction X and a lateral direction extending in the width direction Y at the center in the front-rear direction. A suspension groove 30 is provided. And the width direction outer side is a side part 22 and 22 rather than a pair of vertical suspension groove | channels 28 and 28, The space | interval becomes the seating part 20. FIG. In addition, the rear side of the horizontal hanging groove 30 is a bottom part 24 and the front side is a thigh part 26. In this example, a second lateral suspension groove 32 is further provided so as to divide the bottom part 24 in the front-rear direction.

  The pad main body 12 is provided with an accommodation recess 34 for accommodating the breathable member 14 on the pad surface of the thigh lower part 26. The housing recess 34 is formed over substantially the entire region of the lower thigh 26 in a rectangular shape in plan view, and is recessed from the pad surface at a predetermined depth. In this example, the housing recess 34 is not provided so as to cover the front edge 12A of the pad body 12, and is separated from the front edge 12A, that is, a position spaced a predetermined distance rearward from the front edge 12A. Is provided.

  Thus, when the accommodation recessed part 34 has not reached the front edge 12A of the pad main body 12, the air from the front of the sheet cannot be taken into the accommodation recessed part 34 as it is. Therefore, in this example, as shown in FIGS. 1 to 3, an air flow path 35 that connects the housing recess 34 and the front edge 12 </ b> A of the pad main body 12 is provided. As a state where the front edge 12 </ b> A is opened so as to allow ventilation, air can be taken into the receiving recess 34 from the front of the pad main body 12. In this example, the air flow path 35 is formed by a concave groove extending in the front-rear direction X provided on the pad surface, and a plurality (three in the figure) of the concave grooves are provided in the width direction Y. As the air flow path 35, for example, if the housing recess 34 is opened to the front edge 12 </ b> A of the pad body 12, for example, the front-rear direction X penetrating from the front edge of the housing recess 34 to the front edge 12 </ b> A of the pad body 12 It may be a through hole extending in the direction.

  The pad main body 12 is further provided with a vent hole 36 that passes through the pad main body 12 and communicates the inside of the receiving recess 34 with the pad back surface side (that is, the lower surface side of the pad main body 12). In this example, two vent holes 36 are formed in a rectangular shape in plan view, one on each side, and a total of two vent holes 36 are provided. However, the shape and the number are not particularly limited as long as one or more.

  As shown in FIGS. 4 to 6, in the pad main body 12, a back surface side recess 38 is formed in a recessed manner on the pad back surface side of the thigh lower portion 26. The back side recesses 38 are provided approximately symmetrically at two locations on the left and right sides so as to correspond to the left and right thighs of the seated person, and have a rectangular shape in plan view. The vent hole 36 is provided on the back side of the pad so as to open to the back side recess 38, and is thus provided so as to connect the accommodation recess 34 and the back side recess 38. Further, as shown in FIG. 5, the vent hole 36 is not perpendicular to the bottom surface of the housing recess 34, but is provided so as to extend obliquely rearward Xr from the housing recess 34 toward the pad back surface side. .

  A reinforcing cloth 40 such as a nonwoven fabric is laminated on the back surface of the pad main body 12. When the polyurethane foam raw material is injected into the mold and the pad main body 12 is foam-molded, the reinforcing cloth 40 is laminated and integrated in advance by being attached in the mold. The reinforcing cloth 40 is provided over substantially the entire back surface of the pad except for the portion where the back surface side recess 38 is provided.

  The breathable member 14 is made of a three-dimensional net-like cushion body made of a fiber material, and is disposed in the housing recess 34 of the pad main body 12. The breathable member 14 has a shape corresponding to the receiving recess 34 so as to cover the upper surface of the vent hole 36 and fill the receiving recess 34. In this example, as shown in FIG. Is formed. By arranging the air-permeable member 14 in the housing recess 34 in this manner, a ventilation space, which is a space through which air flows, is formed between the pad main body 12 and the seat cover 16 in the lower thigh 26.

Here, the three-dimensional reticulated cushion body is not particularly limited as long as it has cushioning properties and air permeability. However, a fiber material (continuous linear body) having a fineness of 300 dtex or more made of a thermoplastic elastic resin is twisted. It is preferable to use a three-dimensional random loop joined structure in which random loops are formed, the respective loops are brought into contact with each other in a molten state, and most of the contact portions are fused. The fineness is more preferably 500 to 100,000 dtex, still more preferably 500 to 50,000 dtex. As the thermoplastic elastic resin, it is preferable to use thermoplastic elastomers such as polyester elastomers, polyamide elastomers, polyurethane elastomers, and polyolefin elastomers. The three-dimensional random loop bonded structure preferably has an apparent density (based on JIS K6400) of 5 to 100 kg / m ³ , more preferably 10 to 80 kg / m ³ . By using a material having such an apparent density, excellent air permeability can be imparted while ensuring cushioning properties. As a specific example of such a three-dimensional random loop bonded structure, for example, “Breath Air” manufactured by Toyobo Co., Ltd. can be cited.

  As shown in FIG. 1, the seat cover 16 is provided so as to cover the entire surface of the pad main body 12 and the air-permeable member 14, and uses the hanging grooves 28, 30, and 32 provided on the pad surface. Thus, it is pasted by a known method. The seat cover 16 is not particularly limited as long as it has air permeability. For example, in addition to a fabric made of polyester fiber or the like, leather or the like imparted with air permeability by punching or the like can also be used.

  The support frame 18 is disposed below the pad body 12 and supports the pad body 12. As shown in FIGS. 1 and 7, the support frame 18 has a substantially rectangular shape corresponding to the back surface of the pad, and has a rigidity to receive the lower surface of the front portion (specifically, the thigh lower portion 26) of the pad body 12. The receiving surface portion 42 and a spring portion 44 that is provided behind the pad body 12 and elastically supports the lower surface of the rear portion of the pad main body 12 (specifically, mainly the bottom portion 24).

  Specifically, the support frame 18 includes a front receiving surface portion 42 having a substantially horizontal surface extending in the width direction Y at the front end portion, side wall portions 46 and 46 extending rearward from both left and right ends, and side wall portions 46 and 46. A plurality of rear connecting parts 48 that connect the rear end parts, and a plurality of parts that extend between the front receiving surface part 42 and the connecting part 48 and extend in the front-rear direction while swinging left and right alternately in a substantially horizontal plane. The S-shaped spring 45 of the book is provided.

  Since the pair of left and right rear surface side concave portions 38 are provided on the lower surface of the thigh lower portion 26 of the pad main body 12 as described above, the convex portion 50 (see FIGS. 4 to 6) therebetween is a front side support of the support frame 18. Abutted and supported by the surface portion 42. Therefore, as shown in FIG. 1, a gap 52 is formed between the thigh lower portion 26 and the front receiving surface portion 42 by the back surface side concave portion 38, and air is further directed toward the rear spring portion 44. The rear side recess 38 extends beyond the rear end of the front receiving surface part 42 to the rear so as to come out.

  In the present embodiment configured as described above, the air-permeable member 14 made of a three-dimensional mesh cushion is disposed in the housing recess 34 provided on the pad surface, so that air flows between the pad main body 12 and the seat cover 16. A ventilation space is formed. Therefore, warm air can be flowed from the ventilation space through the ventilation hole 36, and thus it becomes easy to discharge the increased temperature and humidity.

  In particular, since the housing recess 34 for housing the breathable member 14 is opened so as to be able to vent the front edge 12A of the pad main body 12 so as to take in air from the front of the seat, It is possible to create an air flow that leads to the breathable member 14 of the housing recess 34 and leads to the back side of the pad through the vent hole 36. Therefore, air can be repeatedly discharged and sucked by vibration during sitting and driving, and the air can be flowed to discharge the increased temperature and humidity. Further, wind from the front of the seat generated by operating a normal air conditioner is taken into the air-permeable member 14 of the housing recess 34 from the front edge 12A of the pad body 12 through the air flow path 35 as shown in FIG. The air can be released from the air-permeable member 14 to the back surface side of the pad and further to the spring portion 44 through the air hole 36. Therefore, it is possible to make the air easily flow in the seat 10 by using the flow of air in the vehicle interior.

  In this way, the existing air conditioning equipment can be used as it is, and air can be circulated in the seat 10 by using the flow of the wind, so that the temperature and humidity that are easily trapped in the seat 10 can be discharged while having an inexpensive structure. This makes it easier to reduce stuffiness when seated.

  Further, in this embodiment, since the back surface side concave portion 38 is provided in the thigh lower portion 26 and the vent hole 36 is opened in the back surface side concave portion 38, air can be easily discharged to the pad back surface side. In particular, in combination with the configuration of the support frame 18 and the positional relationship between the back surface side recesses 38, the effect of allowing air to escape backward on the pad back surface side can be enhanced. In addition, since the vent hole 36 is inclined rearward and downward as described above, the effect of escape to the rear can be further enhanced.

(Second Embodiment)
FIG. 8 is a view showing a state in which the pad main body 12 and the breathable member 14 according to the second embodiment are assembled. In this example, the structure of the air flow path 35 provided in the pad main body 12 is different from that of the first embodiment.

  That is, in this example, the groove-shaped air flow path 35 that connects the housing recess 34 and the front edge 12A of the pad main body 12 is not simply provided up to the pad front edge 12A, but is further extended downward. Therefore, an extension groove portion 54 extending in the vertical direction on the front surface portion 12B of the pad main body 12 is formed.

  Thus, by extending the air flow path 35 so as to go around the front surface portion 12B of the pad main body 12, it is possible to make it easier to take in wind from the front of the seat. Other configurations are the same as those of the first embodiment, and the same operational effects are achieved.

(Third embodiment)
9 to 11 show a third embodiment. This embodiment is different from the first embodiment in that the breathable member 14 is provided so as to cover the front edge 12A of the pad main body 12.

  That is, in this example, the accommodation recess 34 provided in the pad main body 12 is provided in a shape opened to the front of the pad main body 12 so as to cover the front edge 12A of the pad main body 12, and in the first embodiment. On the other hand, it is extended forward. The breathable member 14 is disposed so as to fill the extended housing recess 34, and thus the breathable member 14 is provided up to the front edge 12 </ b> A of the pad main body 12.

  By arranging the air-permeable member 14 up to the front edge 12A of the pad main body 12 in this way, the thigh pressure feeling can be reduced. The breathable member 14 made of a three-dimensional mesh cushion has a characteristic that the amount of deflection with respect to the initial load is large and soft when the hardness is set equal to that of the pad body 12 made of polyurethane foam foam. This is because the three-dimensional reticulated cushion body does not have a high-density skin layer (higher density than the core part) like the polyurethane foam foam molding. For example, a foam molded body of a general polyurethane foam as a seat cushion pad and a “breath air” manufactured by Toyobo Co., Ltd. as a three-dimensional network cushion body, when comparing load deflection characteristics, as shown in Table 1 below, Although the hardness (25% hardness) was substantially equal, the load at the time of 5% deflection and 10% deflection was significantly smaller in the three-dimensional mesh cushion body. The load deflection characteristic test was performed in accordance with the hardness test of JASO-B408 (maximum load: 980 N, pressure plate: φ200 mm, deflection rate: 100 mm / min).

  As described above, the breathable member 14 is softer than the pad main body 12 with respect to the initial load. By providing the breathable member 14 so as to cover the pad front edge 12A, it is possible to reduce the thigh pressure feeling. Further, by disposing the air-permeable member 14 up to the front edge 12A of the pad main body 12, the air from the front of the seat can be taken in the entire width direction, so that the air can be more easily flowed. Other configurations are the same as those of the first embodiment, and the same operational effects are achieved.

(Fourth embodiment)
FIG. 12 is a view showing a state in which the pad main body 12 and the breathable member 14 according to the fourth embodiment are assembled. This example is different from the third embodiment in that the breathable member 14 is extended so as to go around the front surface portion 12B of the pad main body 12.

  That is, in this example, the housing recess 34 and the air-permeable member 14 disposed on the receiving recess 34 extend not only to the pad leading edge 12A but also to the lower side. A vertical wall portion 14A of a breathable member 14 extending in the vertical direction on the front surface portion 12B is formed.

  By extending the breathable member 14 so as to wrap around the front surface portion 12B of the pad main body 12 in this manner, the effect of reducing the feeling of pressure on the thigh can be further enhanced, and further wind from the front of the seat is taken in. It can be made easier. Other configurations are the same as those of the third embodiment, and the same operational effects are achieved.

(Fifth embodiment)
FIG. 13 shows a vehicle seat according to the fifth embodiment. This embodiment is different from the first embodiment in that air permeability of the seat cover 16 is partially improved in order to increase air intake from the front.

  That is, in the present embodiment, the seat cover 16 is formed to have higher air permeability than the other portions in the front side portion 16A that covers the front edge 12A of the pad body 12 including the air flow path 35 portion. More specifically, in this example, the air permeability in the range indicated by M in FIG. 13 is set to be higher than the air permeability of the other portions, that is, the seat cover 16 is provided with the front surface portion 12B of the pad body 12. The front side portion 16 </ b> A that covers and faces the front of the vehicle has higher air permeability than the seat cover main body portion 16 </ b> B including the portion that covers the seating portion 20. In this way, the seat cover 16 that is partially air permeable can be obtained by a technique such as roughening the fabric or leather mesh constituting the seat cover or increasing the number of punches in the front side portion 16A.

  Thus, by setting the air permeability of the front side portion 16A of the seat cover 16 to be high, it is possible to further take in the wind from the front of the seat, and the air from the air flow path 35 to the air permeable member 14 of the housing recess 34 Can be made smoother. Other configurations are the same as those of the first embodiment, and the same operational effects are achieved.

(Other embodiments)
In the above embodiment, the breathable member 14 is installed only at the lower thigh 26, but the breathable member 14 may be provided from the lower thigh 26 to the lower buttocks 24 in the entire seating portion 20, thereby improving the comfort. Can be further increased. However, since the bottom part 24 has a great influence on the sitting comfort, the breathable member 14 is preferably installed only on the thigh lower part 26.

  Further, in the above embodiment, the vent hole 36 is provided by being opened in the recess 38 on the back surface side of the pad main body 12. However, for example, when the support frame is provided with a groove or hole through which air can be vented, the vent hole is formed in these holes. You may provide by opening with respect to the groove | channel and hole of a support frame.

  Moreover, although the above-mentioned embodiment demonstrated the vehicle seat for 1 person, it is applicable similarly to the seat for 2 persons or 3 persons called a bench type. Further, although not particularly mentioned in the above embodiment, the comfort can be further improved by incorporating the breathable member in the backrest portion. Although not enumerated one by one, various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle seat 12 ... Pad main body 12A ... Front edge 14 ... Breathable member 16 ... Seat cover 16A ... Front side part 20 ... Seating part 26 ... Thigh lower part 34 ... Housing recessed part 35 ... Air flow path 36 ... Vent hole 38 ... Back side recess

Claims (5)

A pad body made of a polyurethane worm foam molded body, and provided with a receiving recess on the pad surface at the lower thigh in the seating portion;
A three-dimensional reticulated cushion body formed of a fiber material, and a breathable member disposed in the housing recess;
A breathable seat cover that covers the surface of the pad body and the breathable member;
The pad main body is provided with a vent hole penetrating the pad main body to communicate the inside of the receiving recess and the back side of the pad, and the front of the pad main body so that the receiving recess can take in air from the front of the pad main body. Open and ventilated against the edge,
The breathable member is provided so as to cover the front edge of the pad main body, and is further extended downward to form a vertical wall portion of the breathable member extending in the vertical direction on the front surface of the pad main body. A vehicle seat characterized by that. A pad body made of a polyurethane worm foam molded body, and provided with a receiving recess on the pad surface at the lower thigh in the seating portion;
A three-dimensional reticulated cushion body formed of a fiber material, and a breathable member disposed in the housing recess;
A breathable seat cover that covers the surface of the pad body and the breathable member;
The pad main body is provided with a vent hole penetrating the pad main body to communicate the inside of the receiving recess and the back side of the pad, and the front of the pad main body so that the receiving recess can take in air from the front of the pad main body. Open and ventilated against the edge,
The housing recess is provided apart from the front edge of the pad body, and an air flow path is provided to connect the housing recess and the front edge of the pad body. The air flow path is opened to the front edge of the main body so as to allow ventilation, the air flow path extends downward at the front edge of the pad main body, and an extension groove extending in the vertical direction on the front surface of the pad main body is provided. A vehicle seat characterized by the above. A pad body made of a polyurethane worm foam molded body, and provided with a receiving recess on the pad surface at the lower thigh in the seating portion;
A three-dimensional reticulated cushion body formed of a fiber material, and a breathable member disposed in the housing recess;
A breathable seat cover that covers the surfaces of the pad body and the breathable member;
A support frame disposed below the pad body and supporting the pad body;
The support frame is provided with a front receiving surface portion that receives the lower surface of the front portion of the pad body, and a spring that is provided behind the front receiving surface portion and elastically supports the lower surface of the rear portion of the pad body with a plurality of springs. With
The pad main body is provided with a vent hole penetrating the pad main body to communicate the inside of the receiving recess and the back side of the pad, and the front of the pad main body so that the receiving recess can take in air from the front of the pad main body. Open and ventilated against the edge,
A back side recess is provided on the pad back side of the thigh lower part, the back side recess extends beyond the rear end of the front receiving surface part to the spring part behind, and the vent hole is on the pad back side. A vehicular seat characterized by being provided to be opened in the recess on the back side. A pad body made of a polyurethane worm foam molded body, and provided with a receiving recess on the pad surface at the lower thigh in the seating portion;
A three-dimensional reticulated cushion body formed of a fiber material, and a breathable member disposed in the housing recess;
A breathable seat cover that covers the surface of the pad body and the breathable member;
The pad main body is provided with a vent hole penetrating the pad main body to communicate the inside of the receiving recess and the back side of the pad, and the front of the pad main body so that the receiving recess can take in air from the front of the pad main body. Open and ventilated against the edge,
The vehicle seat, wherein the vent hole is provided so as to extend obliquely rearward from the housing recess toward the back side of the pad. The vehicle seat according to any one of claims 1 to 4 , wherein the seat cover is formed to have higher air permeability than other portions in a front side portion covering a front edge of the pad main body. .

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