JP5889112B2 - Method for manufacturing vehicle seat pad - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicle seat pad constituting a seat.

  In some cases, a reinforcing insert member is embedded and integrated in a seat pad such as a flexible polyurethane foam constituting a seat or backrest of a vehicle seat such as an automobile. And several manufacturing inventions which embed and integrate such an insert member are proposed (for example, patent documents 1 and 2).

JP 2006-7418 A JP-A-4-265712

  Patent Document 1 proposes an invention in which a compression felt is attached and fixed to a molding die by fitting a pin protruding from the molding die into a first through hole provided in the compression felt as in claim 1. Patent Document 2 states that “a fiber reinforcing body in which a positioning protruding portion is provided on a part of the outer peripheral edge and the outer peripheral edge other than the protruding portion is the same as the cavity or smaller than the cavity, An invention is proposed in which a device is formed in the cavity so as to be pressed against the inner wall surface of the cavity through a skin material, and is integrally formed.

However, there is a vehicle seat pad that is difficult to cope with in the inventions of Patent Documents 1 and 2. For example, FIG. 10 shows a wagon vehicle in which three rows of seats are arranged in the vehicle longitudinal direction (left and right direction on the paper), but it is difficult to apply to the method of manufacturing the back pad for the backrest located in the middle of the vehicle width direction in the second row. . This type of backrest (seat pad) is removed in the state shown in FIG. After that, as shown in FIG. 8, one end of the pad main body is rounded, the plate PL is placed and fixed on the rear surface on the rear side of the vehicle, the backrest is tilted, and the passenger sitting on the rear side of the vehicle with the passengers on both sides can also be used as a table And It is a so-called table back. When an occupant sitting behind the vehicle reaches the table, one end of the pad main body is bent inadvertently so that the hand does not enter the joint LT with the plate PL. The plate-like body 4 (insert member) is required.
The invention of Patent Document 1 has no particular problem when the compression felt plate-like body 4 is attached and set to the mold surface portion of the foaming mold j as shown in FIG. However, when the compression felt 4 is set with the pin P2 to the mold surface portion corresponding to one end of the pad main body related to the backrest, the corner portion d of the core mold m obstructs the setting as shown in FIG. . Even if the operator lowers his / her posture, his eyes ey become blind spots, making it difficult to set. In the figure, symbol k indicates an upper die and symbol n indicates a lower die.
In the invention of Patent Document 2, the protruding portion u on the outer peripheral edge of the fiber reinforcement as a press felt is in pressure contact with the inner wall surface of the cavity, so that pressing is also applied to the peripheral edge portions f on both sides in the vehicle width direction shown in FIG. It became plate body PF with felt present and was inadequate. The backrest br is applied so that the mounting to the vehicle seat is a so-called insertion-killing structure in which the resin socket (the mating member S) is first pushed in from both sides as shown in FIG. It was impossible. The vehicle width direction both side peripheral edge portion f is required to have a certain degree of softness (elastic deformation, bending deformation) in order to avoid interference with the counterpart member S when assembled. When there was a hard press felt plate body PF there was a problem.
Further, positioning and fixing of the insert member by a magnet can be considered. However, even if the compression felt plate-like body 4 is set at the position of the chain line in FIG. 12 (b), due to the magnetic force adsorption, the position is shifted in the direction of the arrow in FIG. There was a problem.

  The present invention solves the above-mentioned problem, and even when a hard press felt plate-like body is disposed at the blind spot position of the foaming mold, it is easy to set and the peripheral edges of both sides in the vehicle width direction are kept soft. It is an object of the present invention to provide a method for manufacturing a vehicle seat pad that can easily assemble a mating member.

In order to achieve the above object, the gist of the invention described in claim 1 is that after the insert member (2) is set in the foamed mold (6) in the mold open state, the foaming raw material (g) is injected and the mold is closed. In the vehicle seat pad manufacturing method in which the insert member (2) is integrally formed with the pad main body (1), the mold surface (91) extends along both side edges of the pad main body (1) mold surface (91). A raised ridge (92) is provided, and the insert member (2) is formed with a plurality of through holes (40), and the sheet-like backing material (3) is partially formed at a plurality of locations by a locking tool (TP). A plate-like body made of press felt (4), which is softer than the plate-like body (4) , and is latched to the backing material (3), and the plate-like body (4) A plate piece (5) made of a cushion material, each having a joint portion (51) locked to both end portions (45), and at least part of which is disposed outside the both end portions (45) , Provided on the mold surface (91). When setting the insert member (2), as the backing material (3) is disposed in the mold surface (91) side, an inner wall of the plate piece the ridge (5) (92) ( 92a), the plate piece (5) is set in a compressed state, and after the foaming raw material (g) is injected, the insert member (2) is integrally formed with the pad body (1). In the method of manufacturing a vehicle seat pad, the foam raw material (g) from the through hole (40) is fixed to the backing material (3) .

As in the first aspect of the present invention, a plate piece (5) made of a cushioning material, at least a part of which is disposed outside both end portions (45) of the plate-like body (4), is provided, and both plate pieces (5) When in contact with the inner wall (92a) of the raised portion (92) provided on the mold surface in the compressed state, the insert member can be easily set. Without resorting to pins, the restoring force accompanying the compression plate piece, to prevent lateral displacement of the plate-like body, Ru can be set holding the mold surface. Since the cushioning plate pieces provided on both outer sides of the plate-like body are softer than the plate-like body, the side peripheral edge of the pad main body is kept in a soft state, and the mating member can be easily assembled.
Sheet over preparative like backing material (3) to the plate-like body (4) and plate pieces (5) Togakakari sealed by an insert member (2) formed by the backing member (3) is the mold surface (91) When arranged on the side, the backing material, the plate-like body, and the plate piece are integrally strengthened . When adhesive foaming material from permeable hole (40) is fixed to the backing material, in manufacturing of the insert member, it is possible to dispense the locking of the plate-like body to the backing material by a simple locking tool.

  The method for manufacturing a vehicle seat pad according to the present invention allows a press felt plate-like body to be easily set on a mold surface that becomes a blind spot position of a foaming mold, and also keeps the periphery of the seat pad soft so that the mating member can be assembled. Excellent effects such as easy.

It is explanatory drawing sectional drawing of the foaming type used with the manufacturing method of the seat pad of this invention. (A) is a plan view of the insert member, and (b) is a view taken along the line II-II in (a). It is explanatory sectional drawing which attaches and sets an insert member to a foaming mold under a mold open state. It is the IV-IV arrow line view of FIG. It is explanatory sectional drawing of mold closing. It is explanatory sectional drawing which carries out foam molding. It is a perspective view of the seat pad taken out by mold removal after FIG. It is the perspective view which attached the plate to the back pad of FIG. 7, and rounded one end part side. It is a reverse view of the back pad of FIG. It is a schematic plan view of a vehicle equipped with a back pad as a seat pad. It is explanatory drawing of a prior art. It is a description back view of a prior art.

  The vehicle seat pad manufacturing method according to the present invention (hereinafter simply referred to as “seat pad manufacturing method”) will be described in detail below. 1 to 10 show an embodiment of the seat pad manufacturing method of the present invention. FIG. 1 is an explanatory sectional view of a foaming mold in a mold open state. FIG. 2 is a plan view of an insert member. Fig. 3 is a sectional view taken along the line II-II of Fig. 3 (a), Fig. 3 is an explanatory sectional view of the insert member attached and set to the foaming die in the mold open state, Fig. 4 is a sectional view taken along the line IV-IV of Fig. 3, 6 is an explanatory cross-sectional view of mold closing, FIG. 6 is an explanatory cross-sectional view of foam molding, FIG. 7 is a perspective view of a seat pad taken out by mold removal after FIG. 6, and FIG. 8 is a plate attached to the back pad of FIG. FIG. 9 is a rear view of the back pad of FIG. 7, and FIG. 10 is a schematic plan view of a vehicle equipped with the back pad as the seat pad. In each figure, the backing material 3, the plate-like body 4, and the plate piece 5 are emphasized and drawn to a large extent, and some hatching indicating a cross section is omitted.

The seat pad P is manufactured by setting the insert member 2 to the foamed mold 6 in the mold open state, injecting the foaming raw material g and closing the mold, embedding the insert member 2 and integrally foaming the pad main body 1. .
The seat pad P includes a back pad BP for a backrest and a cushion pad CP for supporting the lower body of a seated passenger. The seat pad manufacturing method here is a back pad BP of a wagon car as shown in FIG. The present invention is applied to a backrest BP for a backrest that is a wagon vehicle in which three rows of seats ST are arranged in the vehicle front-rear direction (left-right direction on the paper surface) and that is located in the middle in the vehicle width direction in the second row. The back pad BP is a table back that can also be used as a table. The pad body 1 is foam-molded into a backrest shape in the middle of the second row. In FIG. 10, reference symbol E denotes a skin attached to the seat pad, and reference symbol HD denotes a handle.

  FIG. 7 is a perspective view of the back pad BP as viewed from the rear side (back side) of the vehicle. The left side of the paper shows the upper side when the vehicle is installed, the right side shows the lower side, and the vertical direction of the page shows the vehicle width direction. Side portions 13 stand up from the three-way side edges of the rectangular backrest portion 11, and upper receiving portions 14 that refract inwardly extend from the upper edges to form a main portion of the backrest, and further, the lower end of the backrest portion 11. The extending part 12 projects from the edge to form the pad main body 1. In the present embodiment, the distal end side of the extending portion 12 that protrudes from the backrest portion 11 is defined as one end portion 10 of the pad main body 1 on which a plate-like body 4 (described later in detail) is arranged. The back pad BP is foam-molded so that the plate-like body 4 of the insert member 2 is integrally attached to the pad main body back surface 1b. An example of the manufacturing method of the back pad is shown below.

Prior to manufacturing the back pad BP (sheet pad P), the foaming mold 6 and the insert member 2 are prepared.
The foaming mold 6 includes an upper mold 7, a lower mold 8, and a core mold 9 as shown in FIG. When the mold is closed as shown in FIGS. 1 to 5 with the hinge 61 as a fulcrum, the mold surface 81 of the lower mold 8 having a large overall dent, the mold surface 90 of the core mold 9, and the mold surface 71 of the upper mold 7 Thus, the cavity C of the back pad BP in which the insert member 2 is integrated with the pad body 1 is formed. Protruding portions 92 rising from the mold surface 91 are provided along both side edges of the foam mold surface 91 (here, a part of the mold surface 90 of the core mold 9) corresponding to the one end 10 of the pad body 1. .
In this manufacturing method, the surface of the backrest part 11, the extension part 12, and the side part 13 is formed by the mold surface 81 of the lower mold 8, and the backrest part 11, the extension part 12, and the side part are formed by the mold surface 91 of the core mold 9. The back surface of the upper receiving portion 14 is formed, and the surface of the upper receiving portion 14 is formed by the mold surface 71 of the upper mold 7.

  The insert member 2 includes a backing material 3, a plate-like body 4, and a plate piece 5 (FIG. 2). The backing material 3 is a cut piece that uses a sheet-like cloth such as a nonwoven fabric and is sized to cover substantially the entire back surface of the main portion 31, the tongue portion 32, and the overhang portion 33.

  The plate-like body 4 is a rectangular plate made of press felt. When the extending portion 12 of the pad main body 1 is bent from the bent state of FIG. 7 to FIG. 8, the plate-like body 4 is located at the position of the back surface forming portion 121 on the back pad back side of the extending portion 12. Arranged. The plate-like body 4 is locked to the distal end side of the tongue portion 32 with its longitudinal length W4 aligned with the vehicle width direction of the tongue portion 32 (FIG. 9). The long side of the rectangular plate-like body 4 is slightly smaller than the vehicle width direction length W0 of the tongue portion 32 of the backing material 3 (FIG. 2). When the plate-like body 4 is locked to the tongue portion 32, an empty space 32 a for installing plate pieces is provided on both outer sides in the vehicle width direction of the tongue portion 32 (details will be described later).

The plate piece 5 is a plate-like rectangular member made of a cushion material. Slab urethane that is softer than the plate-like body 4 is preferable. The plate piece 5 is locked to the tongue 32 on the outside (both sides in the vehicle width direction) of both ends 45 of the plate-like body 4 locked to the tongue 32 of the backing material 3. Each of the plate pieces 5 has a joint portion 51 that is locked to both end portions 45 of the plate-like body 4, and at least a part thereof is disposed outside the both end portions 45. Here, the side wall surface of the plate piece 5 becomes the joint portion 51 on the end surface 41 of the both end portions 45, and all the plate pieces are arranged outside the both end portions 45 (FIG. 2). The joint portion 51 is a side wall surface of the plate piece 5 that is abutted against the end surface 41 of the plate-like body 4, and is a portion that only contacts the end surface 41. It is not necessary for the joint portion 51 to bond and integrate the side wall surface of the plate piece 5 to the plate-like body end surface 41 with an adhesive or the like. When the side wall surface 51 of the plate piece 5 is abutted against and abutted against the end surface 41, the plate piece 5 is locked to the both ends 45 of the plate-like body.
The plate-like body 4 is arranged on the foaming mold surface 91a corresponding to the central area 10a of the one end portion 10 of the pad body 1 (FIGS. 4 and 9), and on both outer sides of the plate-like body 4 in the vehicle width direction. The plate pieces 5 are installed so as to abut each other. The joining part 51 which is a side wall surface of the plate piece 5 is abutted against the end surfaces 41 of the both ends 45 of the plate-like body, and the plate piece 5 is locked to the plate-like body 4.
The plate piece 5 has a width W1 of the plate piece 5 larger than the width W3 of the empty space 32a of the tongue portion 32 as shown in FIG. The long side of the rectangular plate piece 5 is slightly larger than the short side of the plate-like body 4, and the thickness of the cushioning plate piece 5 is larger than the thickness of the plate-like body 4. Both the plate pieces 5 are compressed, and the insert member 2 is set on the foam mold surface 92 so as to abut against the inner wall 92a of the raised portion 92 located on both outer sides in the vehicle width direction (details will be described later). .

A back pad is manufactured using the foaming mold 6 and the insert member 2 as follows, for example.
First, the foaming mold 6 is set in the mold open state as shown in FIG. Next, the insert member 2 is attached and set to the foamed mold 6 (specifically, the core mold 9) in the mold open state as shown in FIG.
In FIG. 1, an operator standing on the left side of the foaming mold 6 places the insert member 2 on the mold surface 91 corresponding to the one end 10 of the pad body 1 on the hinge 61 side beyond the protruding corner portion 95 of the core mold 9. It is difficult to set. The mold surface 91 becomes a blind spot from the eyes of the operator. In the present invention, the plate-like body 4 is disposed on the mold surface 91a corresponding to the central region 10a of the one end portion 10 (FIGS. 4 and 9), and the plate piece is abutted on both outer sides of the plate-like body 4 in the vehicle width direction. The insert member 2 can be easily set by bringing 5 into a compressed state and abutting against the inner wall 92a of the raised portion 92 located on both outer sides in the vehicle width direction. Without depending on the pin P2, the insert member 2 around the one end portion 10 of the pad body 1 presses the inner wall 92a of the raised portion 92 by the restoring force accompanying the compression of the plate piece 5, and the lateral direction from the set position. It is held without shifting. The width W1 of the cushioning plate piece 5 in FIG. 2 (b) is elastically compressed to the width W2 (FIG. 4), and the plate piece 5 and the plate-like body 4 are set and maintained between the raised portions 92. In addition, by installing the cushioning plate pieces 5 on both sides of the tongue portion 32 in the vehicle width direction, the mating member S is assembled to the back surface forming portion 121 in which the plate pieces 5 are integrally formed even if the plate pieces 5 are present. It will also be easy.

In the present embodiment, the insert member 2 is formed by locking the plate-like body 4 and the plate piece 5 to the sheet-like backing material 3. In the set of the insert member 2 to the core mold 9, the backing material 3 is arranged so as to contact the core mold surface 91. The plate-like body 4 and the plate piece 5 abut against the mold surface 91 via the backing material 3 as shown in FIG. The plate-like body 4 is formed by cutting through holes 40 at a plurality of locations. As shown in FIG. 2, the plate-like body 4 is partially locked to the tongue 32 using the locking tool TP at the center in the vehicle width direction on the tongue 32 of the backing material 3. The locking tool TP is, for example, a tag pin or a staple pin.
Further, square plate pieces 5 are arranged on both outer sides of the plate-like body 4 in the vehicle width direction. The plate piece 5 may also be the locking tool TP, but here it is locked to the tongue 32 with an adhesive or the like.
As shown in FIG. 2 (a), the strip-shaped press felt plate 4 having a ground thickness is aligned with the longitudinal direction of the tongue portion 32 in the vehicle width direction (up and down direction on the paper surface), and is locked to the central portion of the tongue portion 32. Is done. Furthermore, a plate piece 5 made of slab urethane, which is a cushion material, is abutted against both outer sides in the vehicle width direction of the plate-like body 4, and the plate piece 5 is locked to the backing material 3.

The length W0 of the tongue portion 32 in the vehicle width direction is substantially equal to the length W of the extension portion 12 of the pad body 1 in the vehicle width direction (FIGS. 2 and 9), and the distance between the inner wall surfaces 92a of both raised portions 92 is set. Almost equal. As shown in FIG. 2B, the slab urethane plate piece 5 having a width W1 is locked to the backing material 3 so that a part thereof protrudes outward from the tongue 32 in the vehicle width direction. . The insert member 2 is set in the core die 9 as shown in FIGS. 3 and 4 with the backing material 3 facing the mold surface 91 between the raised portions 92, but the plate pieces 5 on both sides of the plate-like body 4. Is elastically compressed from the width W1 to the width W2, and the plate-like body 4 and the plate piece 5 are reliably set and held on the mold surface 91 between the raised portions 92 by the elastic restoration. Since the thick slab urethane plate 5 elastically compressed from both sides sandwiches the plate felt 4 made of hard and pressed felt, the plate 4 does not shift laterally in the vehicle width direction.
In FIG. 4, reference numeral MG denotes a permanent magnet embedded in the core die 9 so that the head is flush with the die surface 91. A backing material 3 facing the permanent magnet MG is attached with a magnetic material-containing adhesive tape piece F such as iron powder, and supports the set of the insert member 2 by magnetic force adsorption. Further, the attachment set of the backing material 3 to the core mold surface 90 other than the mold surface 91 between the raised portions 92 does not reach the blind spot position from the operator. A portion of the backing material 3 arranged in the region is mounted and set by a known pin or magnet.

Here, the press felt used for the plate-like body 4 is originally a fiber product obtained by shrinking wool or the like, and uses a special scale-like surface shape of the fiber such as wool to produce fibers by moisture, heat or pressure. It is finished into a solid and thick sheet by entwining each other. Recently, 100% synthetic fiber press felt has also appeared. Humidity and pressure are applied to the laminate made into a futon with wool, etc. to make a strong sheet-like press felt. From the manufacturing method, the press felt plate-like body 4 disposed on the back surface of the back surface forming portion 121 is compressed based on the cushioning property, and the impregnating property to appropriately absorb the foaming raw material g is integral with the pad main body 1. Increase (binding). When the back pad BP is tilted and used as a table and an occupant sitting behind the vehicle reaches the table, the press felt plate-like body 4 prevents the back surface forming portion 121 from being excessively bent. The press felt plate-like body 4 has the necessary hardness and stiffness. The back surface forming portion 121 is bent and hits a countermeasure member that does not allow an occupant's hand to enter the joint LT with the plate PL (described later in detail). The press felt is not easily frayed by the ground thickness, and a press felt having a predetermined thickness that can be used as it is after being cut into a rectangle as shown in FIG. 2 is more preferable.
Moreover, the slab urethane which is a cushion material used for the plate piece 5 refers to a thick plate made of polyurethane foam. Includes blocks.

After setting to the core mold 9 of the insert member 2, the foam body g is injected and the mold is closed, and then the foam pad body 1 is foamed so that the insert member 2 is integrally attached to the back surface 1 b. Mold.
In this embodiment, after setting the insert member 2 to the foaming mold 6, the foamed urethane foam for pad main body molding using the injection hose N or the like on the mold surface 81 that forms the cavity C of the lower mold 8 with the mold open. A predetermined amount of a foaming raw material g such as a stock solution is injected (chain line in FIG. 3). Subsequently, the upper die 7 and the core die 9 are operated to close the die (FIG. 5). By closing the upper die 7, the core die 9 and the lower die 8, the back pad cavity C into which the insert member 2 is inserted is formed. In addition, after setting the insert member 2 to the foaming mold 6, the foaming raw material g was injected, and then the mold was closed, but after setting the insert member 2 to the foaming mold 6, the mold was closed and then the foaming raw material g was injected. You can also

After closing the mold, the process proceeds to foam molding of the pad body 1. The mold closed state of FIG. 5 is maintained for a predetermined time, and the pad main body 1 as shown in FIG. 6 and FIG. 7 is integrally attached to the back surface 1b side with the plate-like body 4 and the insert member 2 of the backing material 3 with the plate piece 5. Foam molding to make it. The back pad BP is manufactured in a state where the slab urethane plate piece 5 is elastically compressed between the raised portions 92 of the core mold 9 and is held together with the plate-like body 4. The plate-like body 4 is provided with through holes 40, and the foaming raw material g passes through the through holes 40 and is fixed to the backing material 3 in the foam molding process. Thus, the foaming raw material g having adhesiveness is combined with the backing material 3 to prevent the backing material from being lifted.
When the foam molding of the pad main body 1 is finished and removed, a back pad BP in which the backing material 3 with the plate-like body 4 and the plate piece 5 is attached and integrated on the back surface 1b of the pad main body is obtained. A desired back pad having soft slab urethane plate pieces 5 on both sides in the vehicle width direction is produced without the plate-like body 4 being displaced.

  When the skin E is put on the back pad BP, it becomes a backrest for the backrest of the vehicle seat (FIG. 10). Specifically, the extending portion 12 is rounded in a cylindrical shape toward the upper end of the side portion, and the upper opening in FIGS. 7 and 8 formed by the upper receiving portion 14 and the back surface forming portion 121 is covered with a metal plate PL. A mating member S, which is a shielding resin socket, is attached to the inside of the cylindrical shape (the cave Q) from both sides in the vehicle width direction. The backrest is rotatably supported by the vehicle through a shaft (not shown) through the resin socket and the cylindrical inner Q. Further, when the cushion pad CP is covered with a skin cushion E, the vehicle seat ST is obtained.

According to the manufacturing method of the back pad (seat pad) configured as described above, even when the press felt plate-like body 4 is set at the blind spot position of the foaming mold 6 as shown in FIG. Easy to set. In FIG. 3, when an operator standing on the left side of the foaming mold 6 sets the insert member 2 in the core mold 9, it does not rely on the pin P2 as shown in FIG. Further, since it does not depend on the magnetic force adsorption by the permanent magnet MG, the press felt plate-like body 4 set as shown in FIG. 12 (b) does not cause lateral displacement.
The plate pieces 5 are abutted against both outer sides of the plate-like body 4 in the vehicle width direction, and both the plate pieces 5 are brought into contact with the inner wall 92a of the raised portion 92 located on both outer sides in the vehicle width direction. Since the insert member 2 is set, the plate-like body 4 and the plate piece 5 are stably maintained. The plate-like body 4 is reliably set and held at a predetermined position.

  The back pad of FIG. 7 that has been molded is covered with the skin E, and then the extension part 12 is bent as shown in FIG. 8 to join the tip part to the upper receiving part 14 to form a cave Q, The back side opening surrounded by the distal end portion of the extending portion 12 and the upper receiving portion 14 is covered with a plate PL. Then, when assembled to the vehicle, a cylindrical mating member S such as a resin socket is attached to the cave Q, and the support shaft is inserted into the cave Q so that the back pad BP can freely rotate about the support shaft. Supported. Here, since the plate-like body 4 is arranged at a predetermined position of the back surface forming portion 121 without causing positional displacement by foam molding as described above, unnecessary bending can be prevented in that region. The back pad BP can be knocked down and used as a table. When the back pad BP is tilted as shown by the chain line in FIG. 10 and an occupant sitting on the rear side of the vehicle extends his hand to the table, it is possible to prevent the hand from entering the joint LT between the plate PL and the back surface forming portion 121. The back pad BP keeps the softness to pursue comfort on the front surface side of the extending portion 12 and the plate-like body 4 is arranged on the back surface side of the back surface forming portion 121, so that it is ensured that the hand enters the joint LT. Can be prevented. Since the hard press felt plate-like body 4 is arranged, even if the occupant puts his / her hand on the back surface forming portion 121, it does not bend inadvertently, which contributes to improvement in safety and quality.

Nevertheless, since the cushioning plate pieces 5 are arranged on the portions of the back surface forming portion 121 located on both outer sides in the vehicle width direction of the set plate-like body 4, the mating member S can be easily attached. Since there is no hard press felt and the soft plate piece 5 is provided, it is possible to cope with a so-called fit-and-kill structure in which the resin socket of the mating member S is pushed from the cave Q, pushed in, and attached by its return. The plate piece 5 made of slab urethane is provided with softness (elastic deformation, flexural deformation) to avoid interference with the mating member S during assembly. Therefore, the mating member S having a fitting-off structure can be attached to the back pad without difficulty. Attachment of the mating member S to the back pad is easy, and the assembly of the back pad BP to the vehicle proceeds smoothly.
More specifically, in the formation of the through holes 40 in the plate-like body 4, the foam raw material g from the through holes 40 is fixed to the backing material 3 along with the foam molding of the pad main body 1. Moreover, the foaming raw material g penetrate | invades between the plate-shaped body 4 and the backing material 3 from the through-hole 40, and both are bonded and integrated. Therefore, even if the plate-like body 4 is initially locked with the tag pin, the backing material 3 comes into close contact with the pad main body 1 at the stage where the foam molding is finished. The plate-like body 4 can be easily locked to the backing material 3 with a locking tool TP such as a tag pin. Excellent effect, such as contributing to improved workability.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, material, and the like of the pad main body 1, the insert member 2, the backing material 3, the plate-like body 4, the plate piece 5, the foaming mold 6 and the like can be appropriately selected according to the application. Although the embodiment is applied to the back pad for the backrest, it can also be applied to the cushion pad constituting the seat portion. Moreover, although it was set as the case where the plate-shaped body 4 is set in the extension part 12 of a back pad which is hard to visually recognize from an operator in embodiment, the setting position of a plate-shaped body is not restricted here. Furthermore, in the embodiment, the plate piece 5 is abutted against the plate-like body 4, and all of the plate pieces 5 are arranged on both outer sides of the plate-like body 4 in the vehicle width direction. On the other hand, it is sufficient if at least a part of the plate piece 5 is disposed. For example, a part of the plate piece 5 superposed on and fixed to both end portions 45 of the plate-like body 4 is used as the joining portion 51, and the remaining portion of the plate piece 4 protrudes outward from both ends of the plate-like body 4. May be provided. This is also a plate piece 5 that has joint portions 51 that are locked to both end portions 45 of the plate-like body 4 according to the present invention, and at least a part of which is disposed outside the both end portions 45. .

DESCRIPTION OF SYMBOLS 1 Pad main body 10 One end part 10a Central region 2 Insert member 3 Contact member 4 Plate-like body 45 Both ends 40 Through-hole 5 Plate piece 51 Joining part 6 Foam type 91 Mold surface 91a Central area mold surface 92a Inner wall surface P Sheet pad g Foam raw material

Claims (1)

A vehicle in which the insert member (2) is set in the foamed mold (6) in the mold open state, then the foaming raw material (g) is injected and the mold is closed, and the insert member (2) is integrally formed with the pad body (1). In the manufacturing method of the seat pad for
Protruding portions (92) rising from the mold surface (91) are provided along both side edges of the mold surface (91) for the pad body (1), and the insert member (2) forms a plurality of through holes (40). And a felt-like plate-like body (4) that is partially locked to the sheet-like backing material (3) at a plurality of locations by a locking tool (TP ), and softer than the plate-like body (4) Each having a joint portion (51) locked to the backing material (3) and locked to both ends (45) of the plate-like body (4). with plate pieces made of a cushioning material at least partially disposed outwardly and (5), a),
When setting the insert member (2) on the mold surface (91), the backing material (3) is arranged on the mold surface (91) side so that the plate piece (5) is raised. After contacting the inner wall (92a) of the portion (92) and setting the plate piece (5) in a compressed state and injecting the foaming raw material (g), the insert member (2) is inserted into the pad body ( A method of manufacturing a vehicle seat pad , wherein the foaming raw material (g) from the through-hole (40) is fixed to the backing material (3) as it is integrally formed in 1) .

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