JP2008194957A - Sheet pad and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet pad manufacturing method which can easily fit a reinforcing cloth to a foam molding die and stably retain a sheet pad with excellent mold release characteristics, and nevertheless, can manufacture the sheet pad at a low cost. <P>SOLUTION: In manufacturing the sheet pad 10 which is composed of a pad body 12 made of a foamed resin molded body and the reinforcing cloth 14 laminated integrally to the back surface of the former, a metal wire 16 is attached to the reinforcing cloth 14, then a permanent magnet 56 arranged at the foam molding die 40 is made to magnetically attract the wire 16 of the reinforcing cloth 14 and thus the reinforcing cloth 14 is fitted in the die 40. After that, the die 40 is closed to foam mold the pad body 12. In this way, the reinforcing cloth 14 can be integrally molded with the back surface of the pad body 12 with the wire 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a cushion pad used for a vehicle or furniture seat.

  Conventionally, for example, in a cushion pad for an automobile seat, a reinforcing cloth such as felt or a coarse blanket is integrally provided as a backing material on the back surface of the pad in order to suppress damage and noise generation due to friction with the seat frame. In many cases, they are laminated (for example, see Patent Document 1 below). Such a reinforcing cloth is generally attached to the upper die via a mounting pin provided in the upper die, and is laminated and integrated on the back surface of the pad main body, which is a foam, by injecting foaming material into the lower die and foaming. ing.

  When the reinforcing cloth is mounted on the foaming mold using the mounting pin, there are parts that are difficult for the operator to visually confirm during the mounting operation depending on the product shape, and in that case, it is necessary to mount it by groping. For this reason, positional displacement may occur at the time of mounting, and separation or positional shift may occur after mounting. Alternatively, when the upper mold is opened after foam molding or when the product is removed from the mold, the reinforcing cloth may be caught on the mounting pin and torn.

  Therefore, in Patent Document 2 below, a foaming mold is provided with a permanent magnet, a magnetic member is provided on the reinforcing cloth, and the magnetic member is magnetically attracted to the permanent magnet of the foaming mold so that the reinforcing cloth is foam-molded. A technique for mounting on a mold has been proposed. In this document, a small metal piece such as a staple of a stapler, an adhesive sheet piece coated with a metal powder, or the like is used as the magnetic body member. In order to hold it firmly, it is necessary to use a considerable number of magnetic members, which increases the cost.

On the other hand, the seat pad is configured by covering the surface of the pad with a skin such as a woven or knitted fabric or leather on the seat frame, and a wire for locking the stopper on the skin side is embedded in the seat pad. (See Patent Documents 3 to 5 below). Conventionally, such a skin locking wire is attached to the foaming mold separately from the reinforcing cloth, but depending on the product shape, it may be necessary to attach the wire to a site that is difficult for the operator to visually confirm. There is a problem that it is difficult to attach the wire. In such a case, when the mold is removed after foam molding, there are cases where the wire is difficult to come off from the foam mold or interferes with the reinforcing cloth to break the reinforcing cloth.
JP-A-2005-319123 JP 2004-358916 A JP 2005-000453 A Japanese Patent Laying-Open No. 2005-095267 JP 2006-020735 A

  The present invention has been made in view of the above points, and the first problem is that it is easy to attach the reinforcing cloth to the foaming mold, and it is stably held and has excellent demolding properties. The sheet pad can be manufactured at a reduced cost.

  Further, the second problem is that the reinforcing cloth is held in the foam molding die by using the skin locking wire, thereby reducing the number of steps for mounting the parts to the foam molding die, and the skin locking wire at the time of demolding. This is to prevent problems such as breakage of the reinforcing cloth.

  A sheet pad manufacturing method for solving the first problem is a method for manufacturing a sheet pad in which a reinforcing cloth is integrated on the back surface of a pad main body made of a foamed resin molded body. A metal wire is attached to the wire, and a reinforcing cloth to which the wire is attached is magnetically attracted to a permanent magnet provided in the foam molding die, and is mounted in the foam molding die. By closing and foaming the pad main body, the reinforcing cloth is integrated with the back surface of the pad main body together with the wire.

  Further, the sheet pad of the present invention is a sheet pad comprising a pad main body made of a foamed resin molded body and a reinforcing cloth integrated on the back surface of the pad main body. A wire is attached, and the reinforcing cloth is integrated with the back surface of the pad body by foam molding of the pad body together with the wire.

  According to the present invention, the metal wire attached to the reinforcing cloth is magnetically attracted to the permanent magnet of the foaming mold and the reinforcing cloth is attached to the foaming mold. Therefore, the reinforcing cloth is attached to the foaming mold. It can be easily and stably held, and it has excellent mold release properties. In addition, the metal wire is inexpensive per se, and the number of attachment points can be greatly reduced as compared with the case where a staple needle of a stapler or a metal powder sheet piece is used, thereby reducing the manufacturing cost. be able to.

  In the present invention, it is preferable that the wire also serves as a skin locking wire for locking a skin-side locking tool that covers the pad surface. By holding the reinforcing cloth on the foam molding die using the skin locking wire in this manner, compared to the case where the skin locking wire and the reinforcing cloth are separately attached to the foam molding die, The number of parts mounting man-hours can be reduced. Further, the skin locking wire is integrated with the reinforcing cloth, and is attached to the foam molding die by magnetic attraction to the permanent magnet of the foam molding die, so that the reinforcing cloth is damaged by the skin locking wire at the time of demolding. This eliminates the problem of mold removal. Therefore, the second problem is solved.

  Thus, when the wire also serves as a skin locking wire, the reinforcing cloth is provided with one or a plurality of locking tool mounting operation holes for exposing one or a plurality of locked portions of the wire, When the surface of the reinforcing cloth on the side to which the wire is fixed is integrated with the pad main body, the following effects can be obtained.

  That is, in this case, since the wire is sandwiched between the pad main body and the reinforcing cloth, the wire is not completely exposed to the surface of the pad for the sheet. In addition, it is possible to avoid problems such as damage to peripheral members due to exposed wire ends. In addition, the locked portion of the skin can be locked by the locked portion of the wire exposed in the locking tool attaching operation hole of the reinforcing cloth, and after the locking, the wire is locked to the locked portion. Since both sides are covered around the operation hole of the reinforcing cloth, the wire is prevented from floating at the locked portion, and a high locking effect can be exhibited.

  In the present invention, if the wire is attached and fixed to the reinforcing cloth with an adhesive tape, the wire can be attached to the reinforcing cloth easily and at low cost.

  In the present invention, the reinforcing cloth is provided with a tongue-like portion, and the tongue-like portion is folded and wrapped around a part of the wire, and the tongue-like portion is fixed to the reinforcing cloth body with a resin tag pin. If the wire is attached and fixed to the reinforcing cloth, the wire can be easily and reliably attached to the reinforcing cloth.

  ADVANTAGE OF THE INVENTION According to this invention, the pad for sheet | seats can be manufactured at low cost, being easy to attach a reinforcement cloth to a foaming type | mold, being hold | maintained stably and excellent in the demolding property.

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

  FIG. 1 is a perspective view of the back side of the sheet pad 10 according to the first embodiment of the present invention, and FIG. 2 is a sectional view thereof. The seat pad 10 is a pad used for a seat cushion for supporting a passenger's buttocks in an automobile seat. The pad 10 for sheet | seats has the pad main body 12 which consists of a foaming molding with elasticity, such as a flexible polyurethane foam, and the reinforcement cloth 14 as a lining material integrally molded over the whole back surface (lower surface) of this pad main body 12. Consists of. Examples of the reinforcing cloth 14 include coarse blankets, felts, and nonwoven fabrics.

  The surface (upper surface) of the sheet pad 10 is covered with a skin 9 such as fabric (knitted fabric, woven fabric or non-woven fabric), artificial leather, leather, etc. The sheet pad 10 is provided on the skin 9. A skin locking wire 16 for locking the locking tool 8 is provided. The skin locking wire 16 is a metal linear member that is provided on the back side of the drooping portion 18 projecting downward in the front edge portion of the sheet pad 10 and locks the front edge portion 9A of the skin 9. Yes, it extends in the width direction of the hanging portion 18, and in this example, it is provided over the entire width direction.

  In manufacturing the sheet pad 10, first, the reinforcing cloth 14 is cut into a predetermined shape corresponding to the back surface of the sheet pad 10, and the wire 16 is attached to the cut sheet pad 10.

  FIG. 3 is a perspective view of the reinforcing cloth 14 in which the periphery of the attachment portion of the wire 16 is enlarged. As shown in the figure, the wire 16 is provided over the entire width direction of the front edge portion 14A of the reinforcing cloth 14, and is attached and fixed by an adhesive tape 20 such as a paper tape at a plurality of locations in the longitudinal direction of the wire 16. ing. Further, the reinforcing cloth 14 is provided with a plurality of locking tool attaching operation holes 24 for exposing the plurality of locked portions 22 of the wire 16 separately. Here, the locked portion 22 is a wire portion locked by the locking tool 8 on the skin 9 side.

  More specifically, the wire 16 extends linearly along the front edge portion 14A of the reinforcing cloth 14, and both ends 16A are folded back in a U shape. The locking tool mounting operation holes 24 are provided as rectangular openings so as to expose the locked portions 22 at a total of three locations, ie, both ends and the center in the longitudinal direction of the wire 16. Further, the adhesive tape 20 includes both the left and right sides of the central fastener mounting operation hole 24 and both ends 16A of the wire 16 folded back in a U-shape on the tip side of the both ends of the fastener mounting operation holes 24. Are attached to cover the wire 16 at a total of four locations.

  Next, the reinforcing cloth 14 to which the wire 16 is attached is mounted in the foaming mold 40 as shown in FIG.

  The foam molding die 40 is provided with a lower die 42 that opens upward, and an upper die 46 that is rotatably provided via a hinge portion 44 disposed on one side of the lower die 42 to open and close the upper surface opening of the lower die 42. And comprising. The lower mold 42 is a mold for molding the front surface (upper surface) side of the pad 10 and has a concave portion 48 corresponding thereto. The upper die 46 is a die that molds the back surface (lower surface) side of the pad 10, and corresponds to the pad shape between the lower die 42 and the inside of the mating surface (PL portion) 50 by closing the concave portion 48. A cavity 52 that is a foaming space to be formed is formed (see FIG. 5). The cavity 52 is configured such that the front edge portion of the pad 10 having the hanging portion 18 is formed on the hinge portion 44 side, and the thin-walled rear edge portion is formed on the opposite side to the hinge portion 44, The depth of the concave portion 48 is formed larger on the hinge portion 44 side.

  On the lower surface of the upper mold 46 facing the cavity 52, a plurality of mounting pins 54 for mounting the reinforcing cloth 14 in the cavity 52 are provided at predetermined positions. The mounting pin 54 is provided so as to protrude vertically into the cavity 52 from the inner surface of the upper mold 46, and pierces and penetrates a predetermined portion of the reinforcing cloth 14, so that the reinforcing cloth 14 is inserted into the upper portion of the cavity 52. The mold 46 is detachably locked on the surface. The mounting pin 54 is provided in a region that is easy for an operator to visually confirm, that is, in a region excluding the lower end wall 46A of the upper mold 46 that forms the drooping portion 18 in a state where the mold is opened as shown in FIG.

  A permanent magnet 56 for magnetically attracting the wire 16 is embedded in the lower end wall 46A of the upper mold 46 that forms the back side of the drooping portion 18. The permanent magnet 56 is provided corresponding to a plurality of locations in the longitudinal direction of the wire 16 so that one wire 16 is held by the plurality of permanent magnets 56. In this example, the permanent magnets 56 are provided at a plurality of locations in the width direction of the upper mold 46 so as to correspond respectively to the plurality of locking tool attaching operation holes 24 of the reinforcing cloth 14.

  When the reinforcing cloth 14 is mounted on the upper mold 46 of the foaming mold 40, as shown in FIG. 4, the portions other than the lower end portion of the reinforcing cloth 14 are locked by mounting pins 54, and the operator can visually check. For the lower end portion of the reinforcing cloth 14 that is difficult to see, the wire 16, particularly the locked portion 22 thereof, is magnetically attracted to the permanent magnet 56. At this time, the surface 14B of the reinforcing cloth 14 on the side to which the wire 16 is fixed (see FIG. 3) is integrated with the pad main body 12 so that the surface 14B faces the cavity 52 side, and the surface 14B The reinforcing cloth 14 is set with the opposite surface 14 </ b> C (see FIG. 1) facing the mold surface of the upper mold 46.

  After the reinforcing cloth 14 is attached to the upper mold 46 in this way, the foaming raw material 26 is injected into the recess 48 of the lower mold 42 from an unillustrated injection device (see FIG. 4), and the foam molding die 40 is closed. As shown in FIG. 5, the pad main body 12 is foam-molded in the cavity 52. Thereby, the reinforcing cloth 14 is integrated with the wire 16 on the back surface of the pad main body 12. Thereafter, the upper die 46 is opened and removed to obtain the seat pad 10.

  In the present embodiment configured as described above, the skin locking wire 16 is attached to the reinforcing cloth 14 in advance and integrated, and the reinforcing cloth 14 is held at a predetermined position of the foaming mold 40 by the wire 16, Although it is difficult for the operator to visually confirm, the reinforcing cloth 14 can be easily attached, and the number of parts can be reduced to reduce the number of mounting steps. In addition, since the skin locking wire 16 can provide a high adsorption effect with the permanent magnet 56 even with a single wire, it can be stably held in the foaming mold 40, and can also be used as a staple for a stapler or metal. Compared with the case where a powder sheet piece etc. are used, cost can be reduced significantly. In addition, even when the mold is removed, it is easy to remove the mold because it is attracted and held by magnetic force, and the problem that the reinforcing cloth 14 is damaged by the skin locking wire 16 can be avoided.

  In the present embodiment, since the skin locking wire 16 is sandwiched between the pad main body 12 and the reinforcing cloth 14, the wire 16 may be completely exposed on the surface of the sheet pad 10. Thus, it is possible to avoid problems such as dropping of the wire 16 during handling after molding. Further, while the wire 16 is sandwiched between the pad main body 12 and the reinforcing cloth 14 in this way, when the reinforcing cloth 14 is attached to the foaming mold 40, the wire exposed from the locking tool attaching operation hole 24. Since the 16 locked portions 22 can be directly magnetically attracted to the permanent magnet 56 (ie, without interposing the reinforcing cloth 14), the holding effect of the reinforcing cloth 14 is high. In addition, since the wire 16 and the permanent magnet 56 are in direct contact with each other, it is possible to prevent the foaming raw material from entering between the two, and the locked portion 22 of the wire 16 can be more reliably exposed. .

  Further, in the present embodiment, the locking tool 8 on the skin 9 side can be locked by the locked portion 22 of the wire 16 exposed in the locking tool mounting operation hole 24 of the reinforcing cloth 14. After the locking, the wire 16 is covered with the operation hole 24 of the reinforcing cloth 14 on both sides of the locked portion 22, thereby preventing the wire 16 from being lifted at the locked portion 22. Thus, a high locking effect can be exhibited.

  FIG. 6 is a bottom view of the seat pad 30 according to the second embodiment. The seat pad 30 is a pad used for a seat cushion of a rear seat of an automobile, and basically has the same configuration as that of the first embodiment. Only the differences from the first embodiment will be described below.

  In the second embodiment, not only the front edge portion 30A of the seat pad 30 but also the side edge portion 30B and the rear edge portion 30C are provided with the skin locking wires 16. The skin locking wires 16 provided on the front edge portion 30A and the side edge portion 30B are integrally formed to form a substantially L shape as a whole, and the adhesive tape 20 is used similarly to the first embodiment. It is fixedly attached to the reinforcing cloth 14.

  As shown in an enlarged view in FIG. 7, the skin locking wire 16 provided on the rear edge 30 </ b> C is attached and fixed to the reinforcing cloth 14 together with the adhesive tape 20 using a resin tag pin 32.

  Specifically, both ends 16A of the skin locking wire 16 are bent vertically toward the central portion side of the reinforcing cloth 14, and the tips thereof are folded back into U-shapes, respectively. It is fixed by an adhesive tape 20. The fastener mounting operation holes 24 are provided in a circular shape at two locations on both ends in the longitudinal direction of the wire 16.

  At the center in the longitudinal direction of the wire 16, a tongue-like portion 34 is provided by providing a cut in the reinforcing cloth 14. As shown in FIG. 8, the tongue-like portion 34 is folded back so as to wrap around the central portion in the longitudinal direction of the wire 16, and is superimposed on the reinforcing cloth main body 15. Is fixed to the reinforcing fabric body 15 by a resin tag pin 32. The resin tag pin 32 is a locking piece generally used for attaching a price tag to a product, and is struck by a tag attaching machine called a tag gun. In this example, as shown in FIG. 8, the resin tag pin 32 includes a shaft portion 36 that penetrates the tongue portion 34 and the reinforcing cloth main body 15, and a shaft portion that is T-shaped at both ends of the shaft portion 36. An H-shape comprising a pair of locking heads 38 extending perpendicularly to 36 is formed.

  Thus, by providing the tongue-like portion 34 on the reinforcing cloth 16 and fixing the wire 16 with the resin tag pin 32, the wire 16 can be easily and reliably attached to the reinforcing cloth 14. About another structure and manufacturing method, it is the same as that of 1st Embodiment, and there exists an effect similar to the above.

The perspective view of the pad for sheets concerning the 1st Embodiment of the present invention. II-II sectional view taken on the line of FIG. The principal part expansion perspective view of the reinforcement cloth used for the pad for the said sheets. Sectional drawing in the mold opening state of the foaming mold in the embodiment. Sectional drawing at the time of foam molding in the embodiment. The bottom view of the pad for sheets of a 2nd embodiment. The principal part expansion perspective view of the reinforcement cloth used by 2nd Embodiment. VIII-VIII sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 ... Locking tool 9 ... Skin 10, 30 ... Sheet pad 12 ... Pad main body 14 ... Reinforcement cloth, 14B ... Surface 15 to which the wire is fixed ... Reinforcement cloth main body 16 ... Skin locking wire (wire)
DESCRIPTION OF SYMBOLS 20 ... Adhesive tape 22 ... Locked part 24 ... Locking tool attachment operation hole 32 ... Resin tag pin 34 ... Tongue 40 ... Foam molding die 56 ... Permanent magnet

Claims (6)

A method of manufacturing a pad for a sheet in which a reinforcing cloth is integrated on the back surface of a pad body made of a foamed resin molded body,
A metal wire is attached to the reinforcing cloth,
The reinforcing cloth to which the wire is attached is magnetically adsorbed to the permanent magnet provided in the foam mold, and is mounted in the foam mold,
By closing the foam molding die and foaming the pad body, the reinforcing cloth is integrated with the wire on the back surface of the pad body.
A method for producing a pad for a sheet.   The manufacturing method of the pad for sheets of Claim 1 which attaches and fixes the said wire to the said reinforcement cloth with an adhesive tape.   A tongue-like portion is provided on the reinforcing cloth, the tongue-like portion is folded back and a portion of the wire is wrapped, the tongue-like portion is fixed to the reinforcing cloth body with a resin tag pin, and the wire is fixed to the reinforcing cloth. The manufacturing method of the pad for sheets of Claim 1 attached and fixed to.   The sheet pad manufacturing method according to claim 1, wherein the wire also serves as a skin locking wire for locking a skin-side locking tool covering the pad surface.   One or a plurality of locking tool attaching operation holes for exposing one or a plurality of locked portions of the wire are provided in the reinforcing cloth, and the surface of the reinforcing cloth on which the wire is fixed is provided on the pad. The sheet pad manufacturing method according to claim 4, wherein the sheet pad is integrated with the main body. In a pad for a sheet comprising a pad main body made of a foamed resin molded body and a reinforcing cloth integrated on the back surface of the pad main body,
A metal wire is attached to the reinforcement cloth, and the reinforcement cloth is integrated with the back surface of the pad body by foam molding of the pad body together with the wire.
The pad for sheets characterized by this.

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