JP4347647B2 - Cushion pad - Google Patents

Description

  The present invention relates to a cushion pad used for a vehicle seat such as an automobile, and more particularly to a cushion pad provided with an air passage in an air conditioning seat having an air conditioning function.

  2. Description of the Related Art Vehicle seats mounted on vehicles such as automobiles include an air conditioning seat that blows air whose temperature is adjusted through a ventilation path provided in the seat in order to improve passenger comfort when seated.

As a vehicle seat having such an air blowing function, a seat skin having air permeability, a seat pad having a recess formed on the surface on the occupant contact side, and disposed in the recess, formed on the occupant contact side A tubular air passage forming means having an air passage portion that is elastically deformable, and an air blowing means for sending air to the air passage forming means, the air passage forming means being along the sheet skin An extended one is disclosed (Patent Document 1).
JP 2000-125990 A

  However, the vehicle seat described in Patent Document 1 includes a step of forming a recess on the passenger contact side of the seat pad, and an elastically deformable tubular air flow path forming means disposed in the recess, such as rubber. A member such as a blower tube having an air passage portion made of a material is required, and the manufacturing cost of the vehicle seat is likely to increase, which is not always satisfactory.

  The present invention has been made in view of the above problems, and by reducing the number of manufacturing steps of a cushion pad provided with an air passage for passing temperature-controlled air from a blowing means supplied to a seat inside, An object of the present invention is to provide a cushion pad that can be suitably used for an air conditioning sheet that is easy to manufacture and inexpensive.

The cushion pad according to the present invention is a cushion pad made of a foamed resin material for an air-conditioning sheet having a ventilation passage through which air blown to the seat is passed, and a molded body having an air distribution passage extending along the surface of the seat The molded body is embedded in the cushion pad body by foam molding of the cushion pad body, and the molded body is a planar member arranged substantially parallel to the seat surface, and is molded into a hollow tube The air distribution passage is provided with a peripheral edge having a width around the air distribution passage, and an air introduction path for introducing air into the air distribution passage is provided through the air introduction opening opened in the molded body. wherein together it is provided in the cushion pad body communicated with a plurality of air passage for blowing air toward the sheet surface from the air distribution passage, through a plurality of air blowing port which is opened in the shaped body It communicates with the air passage, characterized in that provided on the cushion pad body.

  In this case, the molded body is preferably a synthetic resin molded body that can be elastically deformed.

  According to the cushion pad of the present invention, the air supplied to the seat from the external air blowing means is introduced into the air distribution passage through the air introduction passage provided in the cushion pad body, and the air distribution passage extending along the seat surface is provided. It flows and is distributed over a wide area of the seat, cool air and warm air are blown from the air passage provided in the air distribution passage toward the seat surface, and the temperature of the seat at the occupant abutting portion is quickly adjusted to improve comfort improves.

  In particular, in the present invention, a molded body having an air distribution passage manufactured as a separate part is embedded at the time of foam molding of the cushion pad, and forms an air passage that communicates the air introduction passage and the air passage. The process for forming the air passage and a special mold are not required, and by forming the molded body as an integrally molded body made of synthetic resin, it becomes easier to form the air distribution passage, and it is possible to reliably ventilate the sheet. A path can be formed to improve the air blowing performance of the air-conditioning sheet, and the manufacturing cost of the sheet can be reduced.

  Moreover, even if the seat is pressed by the occupant, the air distribution passage secures the passage while being elastically deformed in response to the deformation of the cushion pad, so that the air blowing performance and the seating comfort to the seat surface can be maintained well.

The shaped body is a planar member substantially disposed in parallel to the sheet surface, and more and this with the air distribution passage that is formed into a hollow tubular handling properties of the molded article at the time of the cushion pad foam molding Can be improved.

According to the cushion pad of the present invention, the temperature-adjusted air supplied from the blowing means is blown toward the seat surface of the air-conditioning seat through the air distribution passage provided in the cushion pad, and the seat temperature is quickly adjusted. be able to. Further, the cushion pad for conditioning the sheet can be easily obtained by integrating buried formed features provided air distribution passages in the pad at the time of foam molding of the cushion pad, the air-conditioning sheet without requiring a complicated manufacturing process Can be easily and inexpensively manufactured.

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

  FIG. 1 is a transverse sectional view of an air conditioning seat 1 for a vehicle, FIG. 2 is a longitudinal sectional view of a seat cushion 2 of the seat 1, FIG. 3 is a perspective view of a molded body 6 provided with an air passage, and FIG. FIG. 5 is a cross-sectional view of a cushion pad molding mold 9.

  The air-conditioning sheet 1 of this embodiment blows the temperature-adjusted air that is forcibly blown from the blowing means (not shown) toward the sheet 1 toward the sheet surface 11 through the ventilation path 4 provided inside the sheet. The seat 1 comprises a seat cushion 2 for receiving the occupant's buttocks and thighs, and a seat back 3 for receiving the waist and back, and the surface of the cushion pad 5 made of urethane foam is covered with a skin 10.

  Here, as the skin 10, air may be blown from the surface of the sheet using a material having air permeability such as fabric, and air may be blown from the surface of the sheet using a non-breathable material such as leather. The temperature may be adjusted without blowing out.

  The ventilation path 4 includes an air distribution path 41 arranged in a substantially H shape along the sheet surface 11, an air introduction path 63 for introducing air into the air distribution path 41, and the air distribution path 41 to the sheet surface 11. The air introduction path 63 and the air supply path 65 provided in the cushion pad main body 5 are connected to the air introduction opening 62 and the air supply opening 64 opened in the air distribution passage 41. Each is connected.

  The air distribution passage 41 is obtained by a molded body 6 made of synthetic resin, and the molded body 6 is embedded and integrated in the cushion pad 5 by urethane foam at a certain distance from the seat surface 11 by foam molding of the cushion pad 5. The

  The molded body 6 is a planar molded member disposed substantially parallel to the sheet surface 11 and includes an air distribution passage 41 formed in a tubular shape.

  The molded body 6 is made of a synthetic resin such as a thermoplastic resin or a thermoplastic elastomer that can be elastically deformed, and the pipe-shaped passages are arranged in an approximately H shape and connected to each other so as to penetrate each other. The terminal portions 41a of the air distribution passages 41 are closed and formed in a bag shape, and the air supplied from an external air blowing means serves as an air flow path for the seat 1 It is made to flow and distribute in a predetermined area.

  The molded body 6 is preferably integrally molded, and by this, the assembly and connection of the air distribution passage 41 and the man-hour for penetrating the connecting portion can be omitted, and the air distribution passage 41 can be easily formed. By setting the tube wall thickness of the air passage 41 to an appropriate thickness, the cushioning property of the cushion pad 5 is maintained to ensure the seating comfort of the seat 1, and the air distribution passage 41 is the cushion pad even if the seat 1 is pressed by the occupant. The cross-sectional shape of each air distribution passage 41 is maintained by rebound resilience while elastically deforming as a whole in response to the deformation of No. 5, and the seating comfort and the air blowing performance to the vicinity of the seat surface 11 can be maintained well together. it can.

  As the synthetic resin, any synthetic resin that can be elastically deformed can be used, and examples thereof include thermoplastic resins such as polyvinyl chloride, polyethylene, polypropylene, polyamide, and various thermoplastic elastomers such as olefins and esters. A rubber material made of natural rubber or various synthetic rubbers can also be used, and any rubber material can be used as long as the molded body 6 can be manufactured by a normal molding method. Among these, a thermoplastic resin is preferable in terms of moldability and cost.

  When the molded body 6 is integrally formed of a thermoplastic resin, as shown in FIG. 3, two resin sheets 43a and 43b are arranged in close contact, and a plurality of passages are blown between the sheets by a blow molding method or the like. After forming the air distribution passage 41 into a substantially H-shape, the peripheral portion 42 around the air distribution passage 41 is thermally bonded by thermal mold pressure bonding, ultrasonic fusion, etc. A molded body 6 having 41 can be obtained.

  As shown in FIG. 3, the molded body 6 is provided with pin insertion holes 44 at the four corners of the peripheral portion 42 for positioning and fixing the molded body 6 in the mold during foam molding of the cushion pad body 5 described later. In addition, notches 45 and 46 for allowing the foamed urethane foam to flow between the inside of the upper mold and the inside of the bottom mold are provided on the four sides of the peripheral edge 42.

  Further, if the peripheral edge portion 42 around the air distribution passage 41 is provided with a width, it is possible to prevent displacement of the air distribution passage 41 during foam molding of the cushion pad 5, and the air introduction port 62 and the air blowing port. The opening operation of 64 is facilitated, and the load of the occupant is dispersed throughout the molded body 6, thereby preventing the air distribution passage 41 from being deformed and ensuring the air fluidity.

  FIG. 5 is a sectional view of a molding mold 9 in which the molded body 6 is embedded and integrated at a predetermined position in the cushion pad 5 by foam molding.

  In the bottom mold 92, positioning pins 93 protrude from four positions corresponding to the pin insertion holes 44 at the boundary between the sheet surface layer portion 94 and the side support 95, and the four corners of the molded body 6 are formed on the pins 93. The molded body 6 is positioned and fixed in the mold 9 by inserting the pin insertion holes 44 of the part.

  Then, a urethane stock solution is injected into the cavity of the molding mold 9. At that time, the urethane stock solution can be injected into the cavity of the bottom mold 92 below the molded body 6 as indicated by an arrow A from the notch 45 of the peripheral edge 42 of the molded body 6. After filling the lower space of the molded body 6, the remaining urethane foam flows out into the upper mold 93 from the notches 45 and 46 (arrow B), and the cushion pad 5 is integrally formed with the urethane foam. At the same time, the molded body 6 is embedded in a predetermined position in the cushion pad 5.

  Therefore, by making the molded body 6 have the above-described configuration, the handleability at the time of molding the cushion pad 5 is improved, and the air distribution passage 41 can be easily and reliably formed in the cushion pad 5.

  The cushion pad 5 is provided with an air introduction path 63 that communicates with an air introduction port 62 opened in the molded body 6 from the back side of the seat, and communicates with a plurality of blower ports 64 that are opened in the upper part of the molded body 6. An air blowing path 65 is provided toward the sheet surface 11, and the temperature-adjusted air supplied from the blowing means is blown toward the sheet surface 11 through the air passage 4.

  The air introduction path 63 and the air blowing path 65 can be formed by molding at the time of foam molding of the cushion pad 5. However, the outside of the cushion pad 5 after foam molding is cut out or hot-wire processing using infrared rays is used. You may open by a drilling process, and you may open the air introduction port 62 and the ventilation port 64 simultaneously to the air distribution path 41 at the time of this drilling process.

  As shown in FIG. 4, the air distribution passage 41 is formed around the air introduction port 62 communicating with the air introduction passage 63 connected to the blowing means, and extends along the passenger contact portion of the seat surface 11. An air distribution passage 41 is provided from the occupant's buttocks to the thighs of the seat cushion 2 and also from the waist to the back of the seat back 3, and the air supplied into the passage 41 from the air inlet 62 is a wide range of the seat 1. The temperature of the sheet 1 can be quickly adjusted by blowing the temperature-controlled air to the plurality of air passages 65 to improve the comfort.

  Further, the air distribution passage 41 is preferably provided in a substantially straight and simple shape, such as a substantially H-shape shown in the figure, which reduces heat loss during air flow and reduces air loss from the air introduction passage 63. The supplied air can flow smoothly, and the air introduction path 63 can be provided near the center of the cushion pad 5 to improve the air distribution efficiency over a wide area, enabling more efficient air blowing. Therefore, the air-conditioning seat 1 with high immediate effect can be provided, and passenger comfort can be further improved.

  Therefore, the air-conditioning sheet 1 using the cushion pad 5 having the above-described configuration allows the temperature-adjusted air from the air blowing means (such as an in-vehicle air-conditioning unit for indoor air conditioning or a separate air-conditioning unit) to pass through the ventilation path 4 inside the cushion pad 5. The air is distributed over a wide area of the seat, and the temperature control air is efficiently blown to the seat surface 11 from the air passage 65 provided at a key point to improve the comfort of the occupant, and the molded body 6 is used as a separate part. Thus, the formation of the air distribution passage 41 eliminates the need for complicated processes and special dies when forming the cushion pad, making the air conditioning sheet 1 easy to manufacture and inexpensive.

  As described above, the cushion pad of the present invention blows the air supplied from the blowing means toward the seat surface through the ventilation path provided in the cushion pad, and quickly adjusts the temperature of the seat, so It can be used as a cushion material for various vehicle air conditioning seats.

It is a cross-sectional view of the air-conditioning sheet of an embodiment. It is a longitudinal cross-sectional view of a seat cushion same as the above. It is a perspective view of the molded object of embodiment. It is a top view of the seat cushion of an embodiment. It is sectional drawing of the shaping | molding mold of a cushion pad.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air-conditioning sheet 11 ... Seat surface 2 ... Seat cushion 3 ... Seat back 4 ... Ventilation path 41 ... Air distribution path 5 ... Cushion pad 6 ... Molded body 62 ... Air inlet 63 ... Air introduction path 64 …… Blower outlet 65 …… Blower path

Claims (2)

A cushion pad made of a foamed resin material for an air conditioning sheet having a ventilation path through which air blown into the sheet passes,
Comprising a molded body having an air distribution passage extending along the seat surface, the molded body being embedded in the cushion pad body by foam molding of the cushion pad body,
The molded body is a planar member disposed substantially parallel to the sheet surface, and includes a peripheral portion having a width around the air distribution passage formed into a hollow tube,
An air introduction path for introducing air into the air distribution passage is provided in the cushion pad main body in communication with the air distribution path via an air introduction port opened in the molded body, and the seat is provided from the air distribution path. Cushions characterized in that a plurality of air passages for blowing air toward the surface are provided in the cushion pad body in communication with the air distribution passage through a plurality of air outlets opened in the molded body. pad.   The cushion pad according to claim 1, wherein the molded body is a synthetic resin molded body capable of elastic deformation.

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