JP2011143746A - Reinforcing material for foam-molded article, foam-molded member, and method of manufacturing foam-molded member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing material for a foam-molded article which is easily manufactured, and easily and precisely attached to the inner surface of a mold. <P>SOLUTION: The reinforcing material 10 is disposed along the bottom surface of a seat pad body 2. An opening 16 is disposed in the reinforcing member 10, and the peripheral edge of the opening 16 is a circular section circularly extended. The reinforcing material includes a connection member 18 as a tension imparting means for imparting tension to decrease the peripheral length of the peripheral edge of the opening 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a planar reinforcing material disposed along at least a part of the surface of a foamed molded product, and more particularly to a foamed molded product reinforcing material having an annular portion extending in a ring shape or a cylindrical shape. The present invention also relates to a foam-molded member having the foam-molded article and the reinforcement for the foam-molded article, and a method for producing the same.

  Vehicle seats and seats such as sofas installed in a house are generally a seat pad made of a foamed synthetic resin such as a flexible polyurethane foam or a semi-rigid polyurethane foam, and a skin material attached to the surface of the seat pad. It consists of.

  In order to prevent noise from being generated when the seat pad comes into contact with the seat frame or damage to the seat pad, the back surface of the seat pad (the surface opposite to the seated person) is made of a nonwoven fabric or the like. A reinforcing material may be provided (Japanese Patent Laid-Open No. 2005-237491). When the sheet pad with the reinforcing material is molded using a mold, the reinforcing material is previously attached to the inner surface of the mold, and the foamed synthetic resin material is foamed in the mold. Thereby, the seat pad in which the reinforcing material is integrated on the back surface is formed.

  At this time, as a method of fixing the reinforcing material to the inner surface of the mold, for example, a magnet is provided on the inner surface of the mold, and a magnetic material that is attracted to the magnet is provided on the reinforcing material, and this magnetic material is magnetized. The reinforcing material is fixed to the inner surface of the mold by adsorbing it to the mold, or the mold is made of a magnetic metal material that can adsorb the magnet, and the magnet is attached to the reinforcing material. There is a method of fixing the reinforcing material to the inner surface of the mold by adsorbing to the inner surface (Japanese Patent Laid-Open No. 2001-252930).

  In recent years, an airbag device that inflates an airbag between an occupant and a side surface of a passenger compartment at the time of a side collision or rollover of the vehicle may be installed in a vehicle seat. In that case, a recess for accommodating the airbag device may be formed in the seat pad (Japanese Patent Laid-Open No. 2009-143260). In addition to this, the seat pad may be formed with various hole-like portions such as a concave portion with which the seat frame is engaged, a through hole into which a support leg of the headrest, a speaker, or the like is inserted. In that case, a convex portion for forming the hole-shaped portion is provided on the inner surface of the mold. The external shape of this convex part is the same shape as the internal shape of the hole-shaped part. When the seat pad main body is molded by foaming the foamed synthetic resin material in the mold, the portion where the convex portion is present becomes a hole-shaped portion after demolding.

JP-A-2005-237491 JP2001-252930 JP2009-143260

  When the reinforcing material is disposed on the inner surface of the hole-shaped portion by integral molding, the reinforcing material can be attached to the convex portion of the mold prior to the foaming process of the seat pad. In that case, the reinforcing member has an annular or cylindrical portion (hereinafter referred to as an annular portion) that engages with the convex portion.

  When a reinforcing material is fixed to the inner surface of the mold using a magnet, this magnet (or a magnetic material that can be adsorbed to the magnet, the same applies hereinafter) is disposed at a required portion of the reinforcing material and is attracted to the inner surface of the mold. . In this case, it is necessary to provide a large number of magnets in order to attract and hold the entire reinforcing material evenly on the inner surface of the mold. For example, in the annular portion of the reinforcing material, in order to engage the annular portion with the convex portion of the mold substantially uniformly over the entire circumference, a plurality of intervals are provided in the circumferential direction of the annular portion. A magnet is disposed. Therefore, the manufacturing operation of the reinforcing material and the mounting operation of the reinforcing material to the inner surface of the mold become complicated.

  In addition, a portion of the reinforcing material that is not provided with a magnet, for example, a portion between the magnets, is not attracted to the inner surface of the mold, and therefore, when the reinforcing material is fixed to the inner surface of the mold, the magnet is moved from a predetermined position. If it deviates, there is a possibility that the part where this magnet is not provided will float from the inner surface of the mold. In this case, the foamed synthetic resin is more likely to enter between the reinforcing material and the inner surface of the mold during foam molding of the seat pad, or wrinkles may be generated in the reinforcing material, which may reduce the accuracy of the outer shape of the seat pad. There is. In order to prevent this, when attaching the reinforcing material to the inner surface of the mold, it is necessary for the operator to fasten each magnet to a predetermined position on the inner surface of the mold with precision. Becomes troublesome.

  Therefore, there is a demand for a reinforcing material for foamed molded body that can be easily manufactured even if it has an annular portion, and that can be easily and accurately attached to the inner surface of the mold.

  The present invention provides a reinforcing member for a foamed molded product that can be easily manufactured and can be easily and accurately attached to the inner surface of a mold. The purpose is to provide materials. Moreover, an object of this invention is to provide the foaming molding member which has a foaming molding, and this reinforcing material for foaming moldings, and its manufacturing method.

  The reinforcing material for a foamed molded product of the present invention (invention 1) is a planar reinforcing material disposed along at least a part of the surface of the foamed molded product, and the reinforcing material is annular or cylindrical. The reinforcing material for a foamed molded article having an annular portion extending to the surface is provided with a tension applying means for applying a tension so as to reduce the circumferential length of the annular portion. .

  The reinforcing material for foam molded body according to claim 2 is the reinforcing member for foam molded body according to claim 1, wherein the annular portion is provided with a cut portion in a direction intersecting with the circumferential direction, and both side portions of the cut portion are formed by the tension applying means. It is characterized by being connected.

  According to a third aspect of the present invention, there is provided the reinforcing material for a foam molded body according to the second aspect, wherein the tension applying means biases the both side portions in the approaching direction in a state where the both side portions of the cut portion are in contact with each other. It is a feature.

  According to a fourth aspect of the present invention, there is provided the reinforcing material for a foam molded body according to any one of the first to third aspects, wherein at least a part of the tension applying means is made of an elastic material.

  The reinforcing material for foamed molded article according to claim 5 is characterized in that, in any one of claims 1 to 4, at least the annular portion of the reinforcing material is made of a nonwoven fabric.

  The foam-molded member of the present invention (Claim 6) is a foam-molded article according to any one of claims 1 to 5, which is disposed along the foam-molded article and at least a part of the surface of the foam-molded article. A body reinforcing material.

  According to a seventh aspect of the present invention, the foam molded member according to the sixth aspect is characterized in that the foam molded member is a seat pad.

  The method for producing a foam-molded member of the present invention (invention 8) is a method for producing the foam-molded member according to claim 6 or 7, wherein the reinforcing material is disposed on the inner surface of the mold. And a foam molding step of foam-molding the foam-molded body in the mold, and in the state where the reinforcing material is disposed on the inner surface of the mold in the placement step, the tension applying means The tension is applied to the annular portion.

  According to a ninth aspect of the present invention, there is provided a method for manufacturing the foam molded member according to the eighth aspect, wherein a convex portion that engages with the annular portion of the reinforcing material is provided on the inner surface of the mold. The annular portion is brought into close contact with the convex portion by tension.

  The reinforcing material for foamed molded product of the present invention (Claim 1) (hereinafter sometimes abbreviated as a reinforcing material) has an annular portion extending in an annular or cylindrical shape, and the circumference of the annular portion. A tension applying means for applying a tension is provided so as to reduce the tension. In the foamed molded member manufacturing method of the present invention (claim 8) in which a foamed molded member with a reinforcing material is manufactured using the reinforcing material for foamed molded product of the present invention, first, the reinforcing material is applied to the inner surface of the mold. Arrangement (arrangement process), and then foam-molding the foam-molded body in the mold (foam molding process). In the state where the reinforcing material is arranged on the inner surface of the mold in this arranging step, tension is applied to the annular portion of the reinforcing material so as to reduce the circumferential length of the annular portion by the tension applying means. The annular portion is tensioned over the entire circumference and comes into close contact with the inner surface of the mold. As a result, in this annular portion, the reinforcing material floats up from the inner surface of the mold during foam molding of the foamed molded article, and the foamed synthetic resin enters between the reinforcing material and the inner surface of the mold, or wrinkles are generated in the reinforcing material. Is more reliably prevented. Therefore, in the foam molded member of the present invention (Claim 6) manufactured by the method for manufacturing a foam molded member of the present invention, the reinforcing material is accurately integrated with the surface of the foam molded body.

  Thus, in the present invention, in a state where the reinforcing material is disposed on the inner surface of the mold, the annular portion of the reinforcing material is tensioned over the entire circumference by the tension applied from the tension applying means. Since it comes into intimate contact, it is possible to facilitate the manufacturing work of the reinforcing material. In addition, simply placing the reinforcing material on the inner surface of the mold allows the annular portion to be tensioned over the entire circumference and tightly contact the inner surface of the mold, so that the reinforcing material can be easily and accurately attached to the inner surface of the mold. It is.

  In the aspect of Claim 2, the notch part is provided in the annular part of the reinforcing material in the circumferential direction and the crossing direction, and both side parts of the notch part are connected by the tension applying means. In this aspect, when the reinforcing material is disposed on the inner surface of the mold, the annular portion can be easily engaged with the inner surface of the mold by separating the both side portions of the cut portion. After the reinforcing material overlaps the inner surface of the mold, due to the tension from the tension applying means, both side portions of the cut portion approach each other so that the circumferential length of the annular portion is reduced, and the annular portion is in close contact with the inner surface of the mold. become. Therefore, it is not always necessary to fasten both side portions of the cut portion to the inner surface of the mold, and the reinforcing material can be easily and accurately attached to the inner surface of the mold.

  In this case, as described in claim 3, the tension applying means is preferably provided so as to urge the both side portions in the approaching direction in a state where the both side portions of the cut portion are in contact with each other. As a result, even when the cut portion is closed and the annular portion overlaps the inner surface of the mold, tension is applied to the annular portion of the reinforcing material so as to reduce the circumferential length of the annular portion. And it comes to be held on the inner surface of the mold.

  As described in claim 4, it is simple and preferable that at least a part of the tension applying means is made of an elastic material.

  As described in claim 5, the present invention is suitable for a reinforcing material having at least an annular portion made of a nonwoven fabric. In general, the nonwoven fabric itself is a material that does not substantially expand and contract. However, as described above, by applying tension to the annular portion so as to reduce its peripheral length by the tension applying means, the annular portion is formed on the inner surface of the mold. It is possible to make it adhere to.

  Moreover, as described in claim 7, the foamed molded member of the present invention is suitable for a seat pad.

  According to the method for manufacturing a foam molded member of the present invention as in claim 9, even when the annular portion of the reinforcing material is engaged with the convex portion provided on the inner surface of the mold, the annular shape is formed by the tension from the tension applying means. The part can be brought into close contact with the convex part.

(A) A figure is a perspective view of a seat pad as a foaming molding member provided with a reinforcing material for foaming moldings concerning an embodiment, and (b) figure is a sectional view which meets a BB line of (a) figure. It is. It is a perspective view of the reinforcing material of FIG. It is an enlarged view of the III part of FIG. It is the perspective view which looked at the same part as FIG. 3 from the IV direction of FIG. It is a perspective view of the metal mold | die and reinforcement material for shape | molding the seat pad of FIG. It is a perspective view which shows the adhesion | attachment procedure of the reinforcing material to the metal mold | die of FIG. 5, (a) A figure shows the state in the middle of attachment, (b) The figure has shown the completion state of adhesion. It is sectional drawing which shows the seat pad shaping | molding process using the metal mold | die of FIG. It is a perspective view of the cylindrical part vicinity of the reinforcement material for foaming moldings which concerns on 2nd Embodiment, and the convex part vicinity of a metal mold | die. It is a perspective view of the same part as FIG. 8 which shows the other structural example of a notch part and a connection member. It is a perspective view of the same part as FIG. 8 which shows the other structural example of a notch part and a connection member. It is a perspective view of the same part as FIG. 8 which shows the other structural example of a notch part and a connection member. It is a perspective view of the same part as FIG. 8 which shows the other structural example of a tension | tensile_strength provision means. It is a perspective view of the same part as FIG. 8 which shows the other example of a shape of the annular part of a reinforcing material, and the convex part of a metal mold | die.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the back pad that constitutes the backrest portion of the vehicle seat is illustrated as the seat pad. However, the present invention constitutes a seat pad other than the back pad (for example, the seat seat portion of the seat). It can also be applied to cushion pads and the like.

[First Embodiment]
FIG. 1 (a) is a perspective view of a seat pad as a foam molded member provided with the reinforcing material for a foam molded body according to the first embodiment, and FIG. 1 (b) is B in FIG. 1 (a). FIG. 2 is a perspective view of the reinforcing member, FIG. 3 is an enlarged view of the III part of FIG. 2, FIG. 4 is the same part as FIG. 3 in the IV direction of FIG. FIG. 5 is a perspective view of a mold and a reinforcing material for forming the seat pad of FIG. 1, and FIGS. 6 (a) and 6 (b) are views of covering of the reinforcing material to the mold. FIG. 7 is a cross-sectional view showing a seat pad forming process using this mold. FIG. 6 (a) shows a state in the middle of applying the reinforcing material to the mold, and FIG. 6 (b) shows a state in which the attaching of the reinforcing material to the mold is completed. Hereinafter, the up-down direction, the left-right direction, and the front-rear direction are the same as the up-down direction, the left-right direction, and the front-rear direction for a seated person of a seat configured using the seat pad 1.

  In this embodiment, the seat pad 1 is a back pad that constitutes a backrest portion of the seat. The seat pad 1 includes a seat pad body 2 made of a foamed synthetic resin such as polyurethane foam, and a planar reinforcing member 10 disposed along the rear surface of the seat pad body 2. The reinforcing material 10 is integrated with the seat pad main body 2 by integral molding. A method for forming the seat pad body 2 will be described in detail later. The seat pad 1 has an outer surface covered with a skin material (not shown) and is attached to a back frame (not shown) of the seat. In this embodiment, the seat pad 1 is for a left seat of a vehicle. The seat pad 1 can be configured for the right seat by reversing the following configuration from side to side.

  As shown in FIGS. 1 (a) and 1 (b), the seat pad main body 2 includes a main body 3 covering the front side of the back frame, and an upper side and a left and right side of the rear surface of the main body 3 to the rear. An overhanging portion 4 that protrudes and a flange portion 5 that protrudes from the rear end of the overhanging portion 4 toward the center of the rear surface of the main body portion 3 are provided. The main body portion 3, the overhang portion 4 and the flange portion 5 are integrally formed. Moreover, the overhang | projection part 4 and the flange part 5 are continuously formed along the upper side of the rear surface of the main-body part 3, and the left-right side. A space surrounded by the main body 3, the overhanging portion 4, and the flange portion 5 is a concave portion 6 in which the upper portion and the left and right side portions of the back frame are fitted. The recess 6 is open toward the center of the rear surface of the main body 3. A headrest mounting hole 7 into which a support leg of a headrest (not shown) is inserted is provided in the overhanging portion 4 along the upper side of the main body portion 3. The headrest mounting hole 7 passes through the overhanging portion 4 in a substantially vertical direction and communicates with the recess 6. The support leg of the headrest is inserted into the headrest attachment hole 7 from above the seat pad 1 attached to the back frame and connected to the back frame.

  The main body part 3 includes a back support part 3a that hits the back of the seated person and a pair of side support parts 3b provided on the left and right sides of the back support part 3a. As shown in FIG. 1 (b), a concave groove 3c is formed on the rear surface of each side support portion 3b. Each concave groove 3c extends in the vertical direction. Each concave groove 3c faces the concave portion 6, and the left and right side portions of the back frame fitted in the left and right concave portions 6 on the rear side of the seat pad body 2 engage with the concave groove 3c.

  As shown in FIGS. 1 (a) and 1 (b), in this embodiment, an airbag device storage chamber 8 for storing an airbag device (not shown) in the left side support portion 3b for the seated person. Is formed. The airbag device storage chamber 8 communicates with the concave groove 3c on the rear surface of the left side support portion 3b. The airbag device is for inflating and deploying an airbag between a seated person and a side surface of a passenger compartment at the time of a side collision or rollover of the vehicle. In this embodiment, when the airbag starts to inflate, the airbag device covers the front surface of the left side support portion 3b (and the front surface of the side support portion 3b from the airbag device storage chamber 8). Material) and bulge between the seated person and the side of the passenger compartment. The airbag device is attached to a side portion of the back frame, and is disposed in the airbag device storage chamber 8 via the recess 6 and the groove 3c when the seat pad 1 is attached to the back frame.

  In this embodiment, as shown in FIG. 1 (b), the airbag device storage chamber 8 is formed between the recessed groove 3 c on the rear surface of the left side support portion 3 b and the left side surface of the seat pad main body 2. In this embodiment, the airbag device storage chamber 8 has a substantially rectangular parallelepiped shape extending substantially parallel to the concave groove 3c. As shown in FIG. 1 (b), the depth of the airbag device storage chamber 8 from the rear surface of the backrest portion 3 to the front is larger than that of the concave groove 3c, and the airbag device storage chamber 8 is a concave groove. It extends to the front rather than 3c. The rear portion of the airbag device storage chamber 8 communicates with the concave groove 3c. The airbag device storage chamber 8 itself is not exposed to the outer surface of the seat pad main body 2 and communicates with the outside of the seat pad main body 2 only through the concave grooves 3 c and the concave portions 6. In this embodiment, as shown in FIG. 1 (a), the front end portion of the airbag device storage chamber 8 has a substantially trapezoidal side-view shape that decreases in vertical width as it approaches the front surface of the side support portion 3b. .

  The configuration of each part of the seat pad main body 2 and the arrangement and shape of the airbag device storage chamber 8 are not limited to this.

  In this embodiment, the reinforcing material 10 is made of a nonwoven fabric. In addition, the material which comprises the reinforcing material 10 is not limited to a nonwoven fabric. In this embodiment, the reinforcing member 10 is connected to the main piece portion 11 disposed along the rear surface of the backrest portion 3a, and the left and right sides of the main piece portion 11, and the inner surface of each concave groove 3c and Left and right side pieces 12 and 13 respectively disposed along the inner surfaces of the left and right overhang portions 4 and the flange portion 5 (the surface facing the inside of the recess 6), and the upper side of the main piece portion 11, The upper wall portion 14 disposed along the inner surface of the upper overhanging portion 4 and the flange portion 5 of the backrest portion 3 and the left side piece portion 12 are connected to the inner wall surface of the airbag device storage chamber 8. And an air bag device storage chamber disposing portion 15 disposed along the air bag device. The upper piece 14 is provided with an opening 14 a that overlaps the headrest mounting hole 7. The reinforcing member 10 includes the main piece portion 11, the side piece portions 12 and 13, the upper piece portion 14, and the airbag device storage chamber arrangement portion 15 that are continuously formed of a single nonwoven fabric. Each part may be formed of small pieces of nonwoven fabric and stitched together.

  In this embodiment, the airbag device storage chamber arrangement portion 15 includes a front surface portion 15a, a rear surface portion 15b, a left side surface portion 15c, and a right side surface portion along the front, rear, left and right walls of the airbag device storage chamber 8, respectively. 15d, it has a bag shape having an upper surface portion 15e and a lower surface portion 15f. On the side surface of the left side piece 12 (hereinafter referred to as the left side piece 12), there is provided a communication port (not shown) that communicates with the inside of the airbag device storage chamber arrangement portion 15. The right edge of the rear surface portion 15b, the rear edge of the right surface portion 15d, and the right edge on the rear end side of the upper surface portion 15e and the lower surface portion 15f are connected to the peripheral edge of the communication port.

  In this embodiment, an opening 16 for allowing the front surface of the side support portion 3b to be cleaved when the airbag is inflated is provided in the front surface portion 15a of the airbag device storage chamber arrangement portion 15. In this embodiment, the opening 16 has a groove shape extending from the upper end side to the lower end side of the front surface portion 15a. The shape of the opening 16 is not limited to this. In this embodiment, the peripheral portion (front surface portion 15 a) of the opening 16 of the airbag device storage chamber disposition portion 15 of the reinforcing member 10 is an annular portion.

  In this embodiment, a notch portion 17 is provided from the upper end edge of the opening portion 16 to the upper surface portion 15e of the airbag device storage chamber arrangement portion 15. As shown in FIGS. 3 and 4, the cut portion 17 extends in a direction substantially orthogonal to the upper end edge of the opening 16, and continues to the middle in the left-right direction of the upper end edge. The upper end edge of the opening 16 is divided into right and left by the cut portion 17 so that both side portions of the cut portion 17 can approach and separate from each other.

  In this embodiment, both side portions of the notch 17 at the upper edge of the opening 16 are connected by a connecting member 18 that can be elastically contracted. In this embodiment, the connecting member 18 is made of a band-shaped elastic material. Examples of the elastic material constituting the connecting member 18 include known materials such as rubber strips, belt-like flat rubber (knitted from yarn and fibrous rubber) used in clothing, thread rubber, springs, and the like. It is done. Alternatively, the connecting member 18 may be made of a stretchable woven fabric or knitted fabric. In addition, the material which comprises the connection member 18 is not limited to this. The connecting member 18 is disposed so as to cross the cut portion 17, and both end sides thereof are coupled to both side portions of the cut portion 17 by sewing or the like. Reference numeral 18 a indicates a seam in which both ends of the connecting member 18 are sewn to both side portions of the cut portion 17. However, the coupling method for coupling the connecting member 18 to both side portions of the cut portion 17 is not limited to sewing.

  By this connecting member 18, both side portions of the cut portion 17 at the upper end edge of the opening portion 16 are urged in the approaching direction. As a result, tension is applied to the peripheral edge of the opening 16 so as to reduce the peripheral length of the peripheral edge. That is, in this embodiment, the connecting member 18 serves as tension applying means for applying tension so as to reduce the peripheral length of the peripheral portion of the opening 16 as an annular portion. The connecting member 18 is attached so as to be slightly extended in a state where both side portions of the cut portion 17 are in contact with each other. As a result, even when both side portions of the cut portion 17 are in contact with each other, the both side portions are urged in the approaching direction by the connecting member 18, thereby reducing the peripheral length of the peripheral portion of the opening 16. Tension is applied as shown.

  The airbag device storage chamber arrangement portion 15 has a peripheral portion (front surface) of the opening portion 16 in a state where both side portions of the cut portion 17 are in contact with each other or are slightly separated (10 mm or less in the embodiment). The portion 15a) is configured to be in close contact with the outer surface of the airbag device storage chamber forming convex portion 30 of the mold 20 described later.

  In addition, the shape and arrangement | positioning of the notch part 17 and the connection member 18 are not limited to the structure of illustration. For example, the cut portion 17 may be provided from an edge portion (for example, left and right side edges or a lower edge) other than the upper edge of the opening 16. In addition, cut portions 17 may be provided at a plurality of locations on the peripheral edge of the opening 16. In this case, both side portions of each cut portion 17 may be individually connected by a connecting member 18, and one connecting member 18 is disposed across a plurality of cut portions 17, and a plurality of cut portions are provided. The both side portions of 17 may be connected by a common connecting member 18. The connecting member 18 may be provided only in a portion of the peripheral edge of the opening 16 that straddles at least the notch 17 or may be provided so as to surround the entire periphery of the opening 16. In this embodiment, the connecting member 18 connects both side portions of the cut portion 17 from the upper end edge of the opening portion 16 to the middle portion in the extending direction of the cut portion 17. It is not limited to this. For example, the connecting member 18 may continuously connect both side portions of the cut portion 17 from the upper end edge of the opening 16 to the end of the cut portion 17. A plurality of connecting members 18 may be arranged at intervals in the extending direction of the cut portion 17.

  Next, the metal mold | die 20 for shape | molding the seat pad main body 2 is demonstrated. As shown in FIG. 5, in this embodiment, the mold 20 includes an upper mold 21, a lower mold 22, and a core 23 set on the upper mold 21. Reference numeral 24 indicates a hinge connecting the upper mold 21 and the lower mold 22. In the mold 20, the seat pad main body 2 is molded in a posture in which the front surface (surface on the seated person side) faces downward. That is, the front surface of the seat pad body 2 is molded by the cavity surface of the lower mold 22, and the rear surface of the seat pad body 2 is molded by the cavity surfaces of the upper mold 21 and the core 23. The rear surface of the main body 3 is formed by the front surface of the core 23 (the vertical direction, left-right direction, and front-rear direction of the core 23 coincide with the vertical direction, left-right direction, and front-rear direction of the seat pad body 2). Is done. Protrusions 25, 26, and 27 for forming the recesses 6 project from the left and right side surfaces and the upper surface of the core 23 (hereinafter, these protrusions 25 to 27 are formed as the recess forming protrusions. There are times.) The convex portions 25, 26, and 27 are formed continuously from the left and right side surfaces to the upper surface of the core 23. From the front surfaces of the left and right convex portions 25 and 26, projecting ridges 28 and 29 for forming the concave grooves 3c are projected. A convex portion 30 for forming the airbag device storage chamber 8 is provided so as to protrude from the left side surface (the front end surface in the protruding direction from the core 23) of the left convex portion 25 toward the left and the front ( Hereinafter, this convex part 30 may be called the convex part for airbag apparatus storage chamber formation.) The convex portion 30 has a substantially rectangular parallelepiped shape extending in the substantially vertical direction along the side surface of the convex portion 25 (that is, a shape that matches the internal shape of the airbag device storage chamber 8). The width of the convex portion 30 in the front-rear direction is larger than the width from the rear surface of the convex portion 25 to the front end surface of the convex strip 28, and the convex portion 30 projects forward from the front end surface of the convex strip 28. It has become. A protrusion 31 for forming the headrest mounting hole 7 projects from the upper end surface of the upper protrusion 27.

  In the reinforcing material 10, the main piece portion 11 has a shape that can be in close contact with the front surface of the core 23, and the left and right side pieces 12, 13 and the upper piece 14 are respectively formed in the core 23. It is the shape which can contact | adhere to the outer surface of each convex part 25,26,27 for each recessed part formation of right and left and upper side. In addition, as described above, the airbag device storage chamber arrangement portion 15 has the airbag device storage chamber forming convex portion in a state where both side portions of the cut portion 17 are in contact with each other or are slightly separated from each other. The shape can be in close contact with the outer surface of 30.

  As shown in FIG. 7, the convex portions 25 to 27, 30 are separated from the cavity surface of the upper mold 21. When the upper mold 21 and the lower mold 22 are clamped, the front surface of the core 23 and the outer surfaces of the convex portions 25 to 27 and 30 and the convex strips 28 and 29 and the upper mold 21 and the lower mold There is a space between the 22 cavity surfaces. That is, the space between the front surface of the core 23 and the front surface of the upper convex portion 27 and the cavity bottom surface of the lower mold 22 is a space for forming the backrest portion 3a, and the front ends of the respective convex strips 28 and 29 and the convex portion 30. A space for forming the side support portions 3 b is formed between the bottom portion and the cavity bottom surface of the lower die 22, and the side surfaces of the convex portions 25 and 26 and the rear end side surface of the convex portion 30 and the upper die 21 and the lower die 22. A space for forming the protruding portion 4 is formed between the cavity side surfaces, and a space for forming the flange portion 5 is formed between the rear surface of each convex portion 25 to 27, 30 and the cavity ceiling surface of the upper mold 21. Become.

  When the seat pad 1 with the reinforcing material 10 is manufactured using the mold 20, first, as shown in FIG. 5, the upper mold 21 and the lower mold 22 are opened, and the reinforcing material is placed on the front side of the core 23. 10 is attached. At this time, as shown in FIG. 6 (a), the airbag device storage chamber arrangement portion 15 and the left side piece portion 12 of the reinforcing member 10 are turned forward, and first, the protrusion 31 is formed on the upper piece portion 14. While engaging the opening 14a, the upper piece 14 is placed on the upper convex portion 27 of the core 23 from above, and then the right piece 13 is placed on the right convex portion 26 and the convex strip 29 of the core 23. Cover. Thereafter, as shown in FIG. 6 (b), while the convex portion 30 is inserted into the airbag device storage chamber arrangement portion 15 from the back side of the left piece 12 through the communication port, the airbag device storage chamber The left side piece 12 is covered with the left side convex part 25 and the convex strip 28 of the core 23 so that the arrangement part 15 and the left side piece part 12 are turned backward, and the airbag device accommodation room arrangement part 15 is provided. Is placed on the convex portion 30. As a result, the main piece 11 of the reinforcing member 10 is in close contact with the front surface of the core 23, and the left and right side pieces 12, 13 and the upper piece 14 are the outer surfaces of the convex portions 25 to 27 and the convex strips 28 and 29, respectively. The airbag device storage chamber arrangement portion 15 comes into close contact with the outer surface of the convex portion 30. Thereby, the attachment to the core 23 of the reinforcing material 10 is completed.

  Thereafter, the foamed synthetic resin raw material is injected into the lower mold 22, and the upper mold 21 and the lower mold 22 are clamped to foam the foamed synthetic resin raw material. This foamed synthetic resin passes between the side surfaces of the convex portions 25 to 27, 30 and the cavity side surfaces of the upper die 21 and the lower die 22, and the rear surface of the convex portions 25 to 27, 30 and the cavity ceiling surface of the upper die 21. Wrap around between. Thereby, the overhang | projection part 4 and the flange part 5 which followed the main-body part 3 are formed. Moreover, the reinforcing material 10 is integrated with these back surfaces. After the foamed synthetic resin is cured, the upper mold 21 and the lower mold 22 are opened to remove the seat pad body 2. In the seat pad main body 2, the portions where the convex portions 25 to 27 and the ridges 28 and 29 are present become the concave portions 6 and the concave grooves 3c, and the portions where the convex portions 30 are present are the airbag device storage chamber. 8 The inner surfaces of the recess 6 and the groove 3c are covered with the side pieces 12 and 13 of the reinforcing member 10, and the inner surface of the airbag device storage chamber 8 is the airbag device storage chamber arrangement portion of the reinforcing member 10. 15 is covered. After removing the mold, the finishing operation such as deburring is performed as necessary to complete the seat pad 1.

  The effect of this reinforcing material 10 is as follows.

  That is, in the reinforcing member 10, a cut portion 17 is formed at the upper edge of the opening portion 16 provided in the front surface portion 15 a of the airbag device storage chamber arrangement portion 15, and both side portions of the cut portion 17 are connected to each other. Are connected by an elastically shrinkable connecting member 18. As described above, the air bag device storage room disposing portion 15 has the peripheral edge portion (front surface portion 15a) of the opening portion 16 in a state where both side portions of the cut portion 17 are in contact with each other or are slightly separated from each other. Is configured to be in close contact with the outer surface of the convex portion 30 of the mold 20. Further, the connecting member 18 is attached so as to urge the both side portions in the approaching direction in a state where the both side portions of the cut portion 17 are in contact with each other. Therefore, in a state where the airbag device storage chamber arrangement portion 15 is covered with the convex portion 30 of the mold 20, both side portions of the cut portion 17 approach each other by the urging force from the connecting member 18, and the opening portion 16. The peripheral edge portion of the protrusion comes into close contact with the outer surface of the convex portion 30. Moreover, since the tension is applied to the peripheral portion of the opening 16 so as to reduce the peripheral length by the urging force from the connecting member 18, the peripheral portion of the opening 16 is tensioned over the entire periphery. Thus, the state of being in close contact with the outer surface of the convex portion 30 is maintained. Thereby, at the time of foam molding of the seat pad main body 2, the peripheral edge portion of the opening portion 16 is lifted from the outer surface of the convex portion 30, and the foamed synthetic resin enters between the reinforcing material 10 and the convex portion 30, or It is more reliably prevented that wrinkles occur at the peripheral edge. As a result, it is possible to manufacture the seat pad 1 in which the reinforcing material 10 is accurately integrated with the surface of the seat pad main body 2.

  As described above, in the reinforcing member 10, the peripheral edge of the opening 16 is overlapped by the tension applied from the connecting member 18 in a state where the peripheral edge of the opening 16 is overlapped with the outer surface of the convex portion 30. Since the tension is applied to the outer surface of the convex portion 30 over the entire circumference, the manufacturing work of the reinforcing member 10 can be facilitated. Further, by simply overlapping the peripheral edge of the opening 16 on the outer surface of the convex portion 30, the peripheral edge of the opening 16 is tensioned over the entire circumference and comes into close contact with the outer surface of the convex portion 30. It is possible to attach the peripheral portion of the portion 16 to the outer surface of the convex portion 30 easily and accurately.

  In this embodiment, the notch 17 is provided at the upper end edge of the opening 16, but both side portions of the notch 17 are connected to each other by the connecting member 18, and the periphery of the opening 16 is convex. When covering the outer surface of the protrusion 30, the both side portions are urged in the approaching direction by the connecting member 18 and come into close contact with the outer surface of the convex portion 30. It is not necessary to fasten to the outer surface, and the peripheral portion of the opening 16 can be easily and accurately attached to the outer surface of the convex portion 30.

  As described above, the connecting member 18 is attached so as to urge the both side portions in the approaching direction in a state where the both side portions of the cut portion 17 are in contact with each other, so that the cut portion 17 is closed. Even in this state, tension is applied to the peripheral edge of the opening 16 so as to reduce the peripheral length, so that the peripheral edge of the opening 16 is firmly held on the outer surface of the protrusion 30.

  In this embodiment, the peripheral portion of the airbag inflating opening portion 16 of the storage chamber arranging portion 15 of the reinforcing member 10 is an annular portion, and the peripheral portion of the opening portion 16 includes the peripheral portion. The tension applying means (in this embodiment, the elastically shrinkable connecting member 18) for providing tension so as to reduce the peripheral length of the portion is provided. Or the annular part (for example, the peripheral part of the opening provided so that it may overlap with the ventilation hole of the seat pad main body 2 among the reinforcing materials 10, or apparatus other than an airbag apparatus in the seat pad main body 2 ( (For example, a portion disposed along the inner surface of a concave portion or a hole-like portion such as a through-hole for accommodating a speaker, etc.), the tension is also applied to this portion so as to reduce its peripheral length. Even if tension applying means for applying is provided There.

  In this embodiment, a cut portion 17 is provided at the peripheral portion of the opening portion 16 as an annular portion, and both side portions of the cut portion 17 are connected to each other by a connecting member 18 as a tension applying means. However, in the present invention, the circumferential length of the annular portion can be reduced by the tension from the tension applying means without providing the notch portion 17 as described above. It can also be configured to be small. For example, in the present invention, the elastic material may be provided integrally with the reinforcing material 10 at least at the peripheral edge of the opening 16, or the elastic material may be connected at the end of the reinforcing material 10 facing the opening 16. Also good. Of course, other configurations may be employed.

  In this embodiment, the peripheral portion of the opening portion 16 as an annular portion is not provided with a fastening means such as a magnet for fastening the peripheral portion to the inner surface of the mold 20, but in the present invention In addition to the tension applying means, such a fastening means may be further provided at the peripheral edge of the opening 16 as the annular portion.

[Second Embodiment]
FIG. 8 is a perspective view of the vicinity of the cylindrical portion of the reinforcing member according to the second embodiment and the vicinity of the convex portion of the mold that engages with the cylindrical portion.

  In the present invention, the annular portion of the reinforcing material may extend in a cylindrical shape. FIG. 8 shows an example of a reinforcing material having an annular portion extending in a cylindrical shape in this way.

  In this embodiment, a substantially cylindrical convex portion 32 is provided on the mold 20, and a concave portion or a through hole (not shown) is formed in the seat pad body 2 by the convex portion 32. .

  As shown in FIG. 8, in this embodiment, the reinforcing member 10 is provided with an opening 19a that overlaps with a concave portion formed by the convex portion 32 or an inlet portion of the through hole, and a peripheral portion of the opening 19a. One end side (base end side) of the substantially cylindrical tubular portion 19 in the cylinder axis direction is continuous. The cylindrical portion 19 is disposed along the inner peripheral surface of the concave portion or the through hole formed by the convex portion 32. The tubular portion 19 is also made of a nonwoven fabric similar to the other portions of the reinforcing material 10. In this embodiment, the other end side (tip end side) of the cylindrical portion 19 in the cylinder axis direction is an open port 19b. In this embodiment, the cylindrical portion 19 has a substantially circular cross-sectional shape, and the inner diameter is substantially constant from the proximal end side to the distal end side. In addition, the shape of the cylindrical part 19 is not limited to this, For example, it can be set as cylinders of various cross-sectional shapes, such as an ellipse and a polygonal shape. Further, the inner diameter of the cylindrical portion 19 may not be constant from the proximal end side to the distal end side.

  In this embodiment, a cut portion 17 is provided from the peripheral edge portion of the opening 19 b on the distal end side of the tubular portion 19 toward the proximal end side of the tubular portion 19. Are connected by an elastically shrinkable connecting member 18. In this embodiment, a cut portion 17 is formed from the leading edge of the cylindrical portion 19 to a middle portion of the cylindrical portion 19 in the cylindrical axis direction, and the connecting member 18 is formed from the leading edge of the cylindrical portion 19. Although the both side portions of the cut portion 17 are connected to the middle portion of the cut portion 17 in the extending direction, the shapes and arrangements of the cut portion 17 and the connecting member 18 are not limited thereto.

  The cylindrical portion 19 has a shape in which the inner peripheral surface is in close contact with the outer peripheral surface of the convex portion 32 in a state where both side portions of the cut portion 17 are in contact with each other or are slightly separated (for example, 10 mm or less). It is comprised so that it may become. Also in this embodiment, the connecting member 18 is slightly extended in a state where both side portions of the cut portion 17 of the cylindrical portion 19 are in contact with each other, and the cut portion 17 It attaches to the cylindrical part 19 so that both side parts may be urged | biased in the approach direction.

  Other configurations of the reinforcing member 10 are the same as those in the embodiment shown in FIGS. The configuration of the mold 20 for foam-molding the seat pad main body 2 is the same as that of the above-described embodiment except that the convex portion 32 is provided.

  In this embodiment, when the reinforcing material 10 is attached to the core 23 when the seat pad main body 2 is foam-molded with the mold 20, the cylindrical portion 19 is attached to the outer peripheral surface of the convex portion 32. At this time, since tension is applied by the connecting member 18 so as to reduce the circumferential length of the cylindrical portion 19, the cylindrical portion 19 comes into close contact with the outer peripheral surface of the convex portion 32. Other attachment methods to the core 23 of the reinforcing member 10 are the same as those in the above-described embodiment. After the reinforcing material 10 is attached to the core 23, the foamed synthetic resin raw material is injected into the lower mold 22, and the upper mold 21 and the lower mold 22 are clamped to foam the foamed synthetic resin raw material. Thereby, the convex part 32 and the cylindrical part 19 surrounding this are embedded in the foamed synthetic resin, and the cylindrical part 19 is integrated with the seat pad main body 2. After the foamed synthetic resin is cured, the upper mold 21 and the lower mold 22 are opened to remove the seat pad body 2. In the seat pad main body 2, a portion where the convex portion 32 existed becomes a concave portion or a through hole, and the inner peripheral surface of the concave portion or the through hole is covered with the cylindrical portion 19 of the reinforcing material 10. After removing the mold, the finishing operation such as deburring is performed as necessary to complete the seat pad 1.

  In this embodiment, when the cylindrical portion 19 is engaged with the convex portion 32, the cylindrical portion 19 is expanded in diameter so that both side portions of the cut portion 17 are separated from each other. The shape portion 19 can be easily engaged with the convex portion 32. And after the cylindrical part 19 engages with the convex part 32, due to the tension from the connecting member 18, the both side parts of the notch part 17 approach each other, and the circumferential length of the cylindrical part 19 becomes small. 19 comes into close contact with the outer peripheral surface of the convex portion 32. Also in this embodiment, the connecting member 18 is attached so as to urge the both side portions in the approaching direction in a state where the both side portions of the cut portion 17 are in contact with each other. Due to the urging force, the cylindrical portion 19 is in a state in which tension is applied so as to reduce the circumferential length thereof, so that the cylindrical portion 19 is tensioned over the entire circumference and is in close contact with the outer surface of the convex portion 32. To maintain. Thereby, at the time of foam molding of the seat pad main body 2, the cylindrical portion 19 is lifted from the outer peripheral surface of the convex portion 32, and the foamed synthetic resin enters between the cylindrical portion 19 and the convex portion 32, or the cylindrical portion 19. It is possible to more reliably prevent wrinkles from occurring. As a result, it is possible to manufacture the seat pad 1 in which the reinforcing material 10 is accurately integrated with the surface of the seat pad main body 2.

  The other operational effects of the embodiment of FIG. 8 are the same as those of the above-described embodiment.

  In this embodiment, the cylindrical portion 19 has a cylindrical shape with a substantially constant inner diameter from the proximal end side to the distal end side, and the convex portion 32 has a substantially constant outer diameter from the proximal end side to the distal end side. However, the shapes of the cylindrical portion 19 and the convex portion 32 are not limited to this. For example, the cylindrical portion 19 may have a shape that the inner diameter increases toward the proximal end side, or may have a shape that the inner diameter increases toward the distal end side, and the middle portion in the cylinder axis direction is the proximal end side. Further, the diameter may be larger than that of the distal end side, or the middle portion in the direction of the cylinder axis may be smaller than that of the proximal end side or the distal end side. The shape of the outer peripheral surface of the convex portion 32 can be variously changed according to the shape of the cylindrical portion 19. FIG. 13 to be described later shows a configuration example of a cylindrical portion 19 ′ whose diameter increases toward the proximal end side and a convex portion 32 ′ with which the cylindrical portion 19 ′ engages.

  In this embodiment, a part of the reinforcing material 10 is the cylindrical portion 19, but the entire reinforcing material 10 may extend in a cylindrical shape. In this embodiment, the tubular portion 19 has an open end on the distal end side, but the distal end side of the tubular portion 19 may also be connected to other portions of the reinforcing member 10.

  In this embodiment, a single cut portion 17 is formed from the leading edge of the cylindrical portion 19 to the middle portion of the cylindrical portion 19 in the cylindrical axis direction, and the connecting member 18 is connected to the leading edge of the cylindrical portion 19. However, the shape, the number, and the arrangement of the cut portions 17 and the connecting members 18 are not limited to this. Below, with reference to FIGS. 8-11, the other example of a structure of the notch part 17 and the connection member 18 is demonstrated.

[Other configuration examples of the cut portion and the connecting member]
FIGS. 9 to 11 are perspective views of the same part as in FIG. 8, showing other configuration examples of the cut portion and the connecting member.

  In the embodiment of FIG. 8 described above, the connecting member 18 connects both side portions of the cut portion 17 from the tip edge of the cylindrical portion 19 to the middle portion in the extending direction of the cut portion 17. As shown in FIG. 9, the connecting member 18 may connect both side portions of the cut portion 17 from the tip edge of the cylindrical portion 19 to the end of the cut portion 17. In this case, since the entire cut portion 17 is concealed by the connecting member 18, the foamed synthetic resin can be more reliably prevented from entering the cut portion 17 during foam molding of the seat pad body 2. .

  The cut portion 17 may be provided up to the proximal end side of the tubular portion 19 as shown in FIG. In this embodiment, the connecting member 18 is formed by connecting both side portions of the cut portion 17 continuously from the leading edge of the cylindrical portion 19 to the end of the cut portion 17, that is, the base end side of the cylindrical portion 19. It has become. By comprising in this way, the cylindrical part 19 can be closely_contact | adhered to the outer peripheral surface of the convex part 32 from the front end side to the base end side.

  In the present invention, a plurality of connecting members 18 may be disposed at intervals in the extending direction of the cut portion 17 so that both side portions of the cut portion 17 are connected at required points. .

  In each of the above-described embodiments, the connecting member 18 is disposed only in the vicinity of the notch portion 17, but the connecting member 18 surrounds the entire circumference of the tubular portion 19 as shown in FIG. It may be arranged. By comprising in this way, the cylindrical part 19 can be stuck to the outer peripheral surface of the convex part 32 more reliably over the perimeter.

  The connecting member 18 in FIG. 11 may be made of an elastically stretchable material such as a rubber material over the entire circumference, and at least a part (for example, only a portion straddling the cut portion 17) is elastically contracted. The remaining portion may be made of a material that does not elastically expand and contract. Also in this embodiment, the connecting member 18 is disposed only in the vicinity of the front end edge of the cylindrical portion 19, but as shown in FIG. 9, it is disposed so as to cover the cut portion 17 up to its end. Alternatively, as shown in FIG. 10, it may be continuously arranged from the distal end side to the proximal end side of the cylindrical portion 19, and a plurality of them are arranged at intervals in the extending direction of the cut portion 17. Also good.

  In each of the embodiments described above, only one cut portion 17 is provided in the cylindrical portion, but a plurality of cut portions 17 may be provided at intervals in the circumferential direction of the cylindrical portion 19. In this case, both side portions of each cut portion 17 may be connected to each other by separate connection members 18, and one connection member 18 is disposed across a plurality of cut portions 17, and a plurality of cut portions are formed. The both side portions of 17 may be connected by a common connecting member 18.

  In each of the above embodiments, the cut portion 17 extends substantially parallel to the cylindrical axis direction of the cylindrical portion 19, but obliquely with respect to the cylindrical axis direction of the cylindrical portion 19, Or you may be curving and extending.

  9 to 11 are the same as those in FIG. 8. In FIGS. 9 to 11, the same reference numerals as those in FIG. 8 denote the same parts.

[Other structural examples of tension applying means]
Also in FIGS. 8 to 12 described above, the cylindrical portion 19 is provided with a cut portion 17, and both side portions of the cut portion 17 are connected to each other by a connecting member 18 as a tension applying means. The configuration is such that the circumferential length of the cylindrical portion 19 is reduced by the tension from the member 18, but the configuration in which the circumferential length of the cylindrical portion 19 is reduced by the tension from the tension applying means is limited to this. Not. FIG. 12 shows another configuration example of the tension applying means. FIG. 12 is a perspective view of the same part as FIG. FIG. 12 merely shows an example of tension applying means.

  In the embodiment of FIG. 12, at least a part of the peripheral edge portion of the opening 19b on the distal end side of the cylindrical portion 19 is made of an elastic material 40 that can be elastically contracted. Specifically, in this embodiment, a concave portion 41 in which the nonwoven fabric is not partially present is formed at the peripheral edge of the open port 19b. In this embodiment, the concave portion 41 is formed by cutting the nonwoven fabric constituting the cylindrical portion 19 into a substantially U-shape from the peripheral edge of the opening 19b toward the proximal end side of the cylindrical portion 19. Has been. The elastic material 40 that can be elastically contracted is disposed so as to close the recess 41. In this embodiment, the elastic material 40 has a substantially rectangular sheet shape that is substantially similar to the concave portion 41, and its three sides are overlapped with the three sides around the concave portion 41 and sewn to the cylindrical portion 19. Has been. Reference numeral 40a indicates a stitch of this sewing. The remaining one side of the elastic material 40 faces the open port 19b, and is disposed so as to be continuous with the leading edge of the cylindrical portion 19 on both sides thereof. The elastic material 40 is attached so as to be slightly extended when the inner diameter of the cylindrical portion 19 is equal to the outer diameter of the convex portion 32 of the mold 20.

  In addition, the shape, arrangement | positioning, formation method of the recessed part 41, the shape and arrangement | positioning of the elastic material 40, and the attachment method to the cylindrical part 19 are not limited to this. For example, in this embodiment, the elastic material 40 is disposed from the distal end portion of the cylindrical portion 19 to the middle portion in the cylindrical axis direction, but from the distal end portion to the proximal end portion of the cylindrical portion 19. You may arrange | position continuously. In this embodiment, only one recess 41 is formed on the peripheral edge of the opening 19b. However, a plurality of recesses 41 are formed at intervals in the circumferential direction of the opening 19b. The elastic material 40 may be provided so as to close each of them. You may make it close the some recessed part 41 with the common elastic material 40. FIG. In this embodiment, the concave portion 41 is provided in the cylindrical portion 19, and the elastic material 40 is provided so as to close the concave portion 41. However, the outer periphery of the cylindrical portion 19 is not provided without the concave portion 41 and the notch portion 17. The elastic material 40 may be disposed along the surface or the inner peripheral surface. Alternatively, for example, the cylindrical elastic material 40 may be connected to the distal end side of the cylindrical portion 19, and the peripheral edge of the opening 19 b may be configured by the elastic material 40 over the entire circumference.

  The other configuration of this embodiment is the same as that of the embodiment shown in FIG.

  Even in this embodiment, when the cylindrical portion 19 is attached to the convex portion 32 of the mold 20, tension is applied by the elastic material 40 so as to reduce the circumferential length of the cylindrical portion 19, The cylindrical portion 19 comes into close contact with the outer peripheral surface of the convex portion 32. The method for attaching the reinforcing member 10 to the core 23 and the method for forming the seat pad main body 2 are the same as those in the embodiment shown in FIG. Even in the embodiment of FIG. 12, the same effects as those of the embodiment of FIG. 8 are achieved.

[Other structural examples of the annular portion of the reinforcing material and the convex portion of the mold]
FIG. 13 is a perspective view of the same part as in FIG. 8 showing another example of the shape of the annular portion of the reinforcing material and the convex portion of the mold.

  Also in this embodiment, the reinforcing member 10 has a cylindrical portion 19 ′ that extends in a cylindrical shape as an annular portion. Also in this embodiment, the cylindrical portion 19 ′ is made of a non-woven fabric like the other portions of the reinforcing material 10. In this embodiment, as shown in FIG. 13, the cylindrical portion 19 'has a substantially truncated cone shape whose inner diameter increases toward the proximal end side. Also in this embodiment, the base end side of the cylindrical portion 19 ′ is connected to the peripheral portion of the opening 19 a provided in the reinforcing member 10, and the distal end side is an open port 19 b.

  Also in this embodiment, the incisions 17 are provided from the peripheral edge of the opening 19b on the distal end side of the cylindrical portion 19 ′ toward the proximal end side of the cylindrical portion 19 ′. The portions are connected by a connecting member 18 that can be elastically contracted. In this embodiment as well, the connecting member 18 is disposed only in the vicinity of the front end edge of the cylindrical portion 19 'as in FIG. 8, but the notch 17 is provided as shown in FIG. It may be disposed so as to cover the end thereof, or may be disposed continuously from the distal end side to the proximal end side of the cylindrical portion 19 ′ as shown in FIG. A plurality may be arranged at intervals. Further, the connecting member 18 may be disposed so as to surround the entire circumference of the cylindrical portion 19 ′. Furthermore, a plurality of notches 17 may be provided at intervals in the circumferential direction of the tubular portion 19 ′.

  In this embodiment, as shown in FIG. 13, a convex part 32 ′ having a substantially frustoconical shape protrudes from a position overlapping the opening 19 a of the reinforcing member 10 on the inner surface of the mold 20. The cylindrical portion 19 ′ has a shape in which the inner peripheral surface is in close contact with the outer peripheral surface of the convex portion 32 ′ in a state where both side portions of the cut portion 17 are in contact with each other or are slightly separated (for example, 10 mm or less). It becomes. Even in this embodiment, the connecting member 18 is slightly extended in a state where both side portions of the cut portion 17 of the cylindrical portion 19 ′ are in contact with each other. It is attached to cylindrical part 19 'so that parts may be urged | biased in the approach direction.

  The other configuration of this embodiment is the same as that of the embodiment of FIG.

  Also in this embodiment, when engaging the cylindrical portion 19 ′ with the convex portion 32 ′, by expanding the diameter of the cylindrical portion 19 ′ so as to separate the both side portions of the cut portion 17, The cylindrical portion 19 ′ can be easily engaged with the convex portion 32 ′. After the cylindrical portion 19 ′ is engaged with the convex portion 32 ′, both side portions of the cut portion 17 approach each other due to the tension from the connecting member 18, and the circumferential length of the cylindrical portion 19 ′ becomes small. The part 19 ′ comes into close contact with the outer peripheral surface of the convex part 32 ′.

  The operational effects of the embodiment of FIG. 13 are the same as those of the embodiment of FIG.

  In the embodiment shown in FIGS. 8 to 13 as well, a magnet or the like for fastening the tubular portion 19 to the outer peripheral surface of the convex portion 32 of the mold 20 is provided on the tubular portion 19 as an annular portion. However, in the present invention, in addition to the tension applying means (the connecting member 18 or the elastic material 40), such a fastening means is further provided in the cylindrical portion 19. Also good.

  Each of the above embodiments is an example of the present invention, and the present invention may take other forms.

  In each of the above embodiments, the annular portion of the reinforcing member is provided with a cut portion, and both side portions of the cut portion are connected by an elastically contractible connecting member, thereby applying tension to the annular portion. However, the configuration for applying tension to the annular portion is not limited to this. For example, in this annular portion, the reinforcing material itself may be made of an elastic material such as a rubber sheet, a stretchable woven fabric or a knitted fabric.

  The present invention is also applicable to foamed molded members other than seat pads.

DESCRIPTION OF SYMBOLS 1 Seat pad 2 Seat pad main body 3 Main part 3a Backrest part 3b Side support part 3c Groove 6 Recess 8 Airbag apparatus storage chamber 10 Reinforcement material 11 Main piece part 12, 13 Side piece 14 Upper piece part 15 Airbag apparatus accommodation Indoor arrangement part 16 Opening part 17 Cut part 18 Connecting member 19, 19 'Cylindrical part 20 Mold 21 Upper mold 22 Lower mold 23 Core 25-27, 30, 32, 32' Convex part

Claims (9)

A planar reinforcing material disposed along at least a part of the surface of the foam molded article,
The reinforcing material is a reinforcing material for a foamed molded article having an annular portion extending in an annular or cylindrical shape,
A reinforcing material for a foamed molded article, comprising tension applying means for applying tension so as to reduce the circumferential length of the annular portion. In Claim 1, the said annular part is provided with the incision part in the circumferential direction and the crossing direction,
A reinforcing material for a foamed molded article, wherein both side portions of the cut portion are connected by the tension applying means.   3. The foam molded body reinforcing material according to claim 2, wherein the tension applying means biases the both side portions in an approaching direction in a state where both side portions of the cut portion are in contact with each other.   The reinforcing material for a foamed molded article according to any one of claims 1 to 3, wherein at least a part of the tension applying means is made of an elastic material.   The reinforcing material for foamed molded products according to any one of claims 1 to 4, wherein at least the annular portion of the reinforcing material is made of a nonwoven fabric. A foam molded body,
A foam molded member comprising the foam molded body reinforcing material according to any one of claims 1 to 5, which is disposed along at least a part of a surface of the foam molded body.   7. The foam molded member according to claim 6, wherein the foam molded member is a seat pad. A method for producing a foam molded member according to claim 6 or 7, comprising:
A disposing step of disposing the reinforcing material on the inner surface of the mold;
A foam molding step of foam-molding the foam-molded body in the mold,
In the state which arrange | positioned this reinforcement material in the metal mold | die inner surface at this arrangement | positioning process, the said tension | tensile_strength is provided with respect to the said annular part by the said tension | tensile_strength provision means, The manufacturing method of the foaming molded member characterized by the above-mentioned. In Claim 8, the inner surface of the mold is provided with a convex portion that engages with the annular portion of the reinforcing material,
A method for producing a foam molded member, wherein the annular portion is brought into close contact with the convex portion by a tension from the tension applying means.

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