JP6437296B2 - Seat pad mold and seat pad manufacturing method - Google Patents

Description

  The present invention relates to a seat pad mold and a seat pad manufacturing method, and more particularly to a seat pad mold and a seat pad manufacturing method capable of accurately arranging hooks.

  There is known a seat pad including a pad main body formed of a foamed resin, a frame embedded in the pad main body, and a hook provided on the frame. In this seat pad, a hook protruding outside the pad main body is fixed to a seat frame or the like installed on a vehicle such as a vehicle, a ship, or an aircraft. In order to prevent foaming resin from adhering to the hook used for fixing, a recess surrounded by a weir is formed on the molding surface of the upper mold, and after fixing the frame to the molding surface while accommodating the hook in the recess, the pad There is a technique for forming a main body (Patent Document 1).

JP 2011-20417 A

  However, in the above-described technique, the position of the hook in the recess depends on the position of the frame fixed to the molding surface.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a seat pad mold and a method for manufacturing the seat pad that can accurately dispose hooks on the pad body.

Means for Solving the Problems and Effects of the Invention

  In order to achieve this object, according to the seat pad mold of claim 1, the frame is embedded in the pad main body formed of foamed resin, the hook projects outside the pad main body, and the hook and the frame are legged. A seat pad connected by the parts is formed. In the mold, a cavity for molding the pad body is formed between the lower mold and the upper mold. In a state where the frame is fixed to the molding surface of the upper mold that forms the cavity, the hook provided on the frame is received in the recess from the opening formed on the molding surface. The opening formed in the molding surface is surrounded by a weir protruding from the molding surface. In a state where the frame is fixed to the molding surface, a leg portion provided on the frame is inserted into a groove formed by cutting out a part of the weir from the tip of the weir toward the molding surface. Since the hook can be positioned with respect to the weir by the groove portion, variations in the position of the hook protruding from the pad main body can be made difficult. Therefore, there is an effect that the hook can be accurately arranged on the pad main body.

Off click is formed by bending in an L-shape with respect to the legs, the frame is secured to a predetermined portion of the leg facing the bending direction of the hook. Since the dam is provided at a position where the frame is adjacent to the molding surface in the in-plane direction with the frame fixed to the molding surface, the dam protruding from the molding surface can be used as a guide for the fixing position of the frame. Therefore , there is an effect that the workability of attaching the frame to the molding surface can be improved.
A part of the frame is arranged in a state where the frame is fixed to the molding surface in a notch portion formed by cutting out a part of the outer periphery side of the weir from the protruding end of the weir to the molding surface. Thereby, it is not necessary to change the shape of the frame according to the position of the weir, and the shape of the frame can be prioritized over the position of the weir. Therefore, it is possible to secure the degree of freedom in designing the frame to prevent the pad body from being improved in rigidity and out of shape.

According to the mold for forming the seat pad according to claim 2 , a plurality of groove portions are formed in the weir, and a plurality of virtual portions obtained by extending a plurality of leg portions inserted into the plurality of groove portions in the in-plane direction of the forming surface. Grooves are formed at positions where the straight lines are non-parallel. By arranging a plurality of groove portions at positions where the leg portions are not parallel, movement of the leg portions inserted into the groove portions can be restricted. Therefore, in addition to the effect of the first aspect , there is an effect that the positional accuracy of the hook disposed on the pad main body can be further improved.

According to the seat pad manufacturing method of claim 3, there is provided a seat pad in which a frame is embedded in a pad main body formed of a foamed resin, a hook projects to the outside of the pad main body, and the hook and the frame are connected by a leg portion. Molded. In the mold for molding the seat pad, a cavity for molding the pad main body is formed between the lower mold and the upper mold. In a state where the frame is fixed to the molding surface of the upper mold that forms the cavity, the hook provided on the frame is received in the recess from the opening formed on the molding surface. The opening formed in the molding surface is surrounded by a weir protruding from the molding surface. By the insertion process, the frame is fixed to the molding surface, and the hook provided on the frame is received in the recess. Leg portions provided on the frame are inserted into grooves formed by cutting out a part of the weir from the tip of the weir toward the molding surface. In a state where the hook is positioned with respect to the weir by the groove portion, the lower mold and the upper mold are closed by the foam curing step, and the liquid foam raw material is foam cured in the cavity. Since variations in the position of the hook protruding from the pad main body can be made difficult, there is an effect that the hook can be accurately arranged on the pad main body.
The hook is formed to be bent in an L shape with respect to the leg portion, and the frame is fixed to a predetermined portion of the leg portion facing the bending direction of the hook. Since the dam is provided at a position where the frame is adjacent to the molding surface in the in-plane direction with the frame fixed to the molding surface, the dam protruding from the molding surface can be used as a guide for the fixing position of the frame. Therefore, there is an effect that the workability of attaching the frame to the molding surface can be improved.
A part of the frame is arranged in a state where the frame is fixed to the molding surface in a notch portion formed by cutting out a part of the outer periphery side of the weir from the protruding end of the weir to the molding surface. Thereby, it is not necessary to change the shape of the frame depending on the position of the weir, and the shape of the frame can be prioritized over the position of the weir. Therefore, it is possible to secure the degree of freedom in designing the frame to prevent the pad body from being improved in rigidity and the shape.

It is a perspective view of the seat pad in a 1st embodiment. It is the perspective view of the seat pad which expanded and showed the part shown by II of FIG. It is a perspective view of a shaping | molding die and a flame | frame. It is the fragmentary perspective view which shows the upper mold | type which expanded and showed the recessed part, and the hook provided in the flame | frame. It is a partial top view of the shaping | molding die to which the flame | frame was fixed. It is sectional drawing of the shaping | molding die in the VI-VI line of FIG. It is sectional drawing of the shaping | molding die in the VII-VII line of FIG. It is a perspective view of the shaping | molding die in 2nd Embodiment. It is the fragmentary perspective view which shows the upper mold | type which expanded and showed the recessed part, and the hook provided in the flame | frame. It is a partial top view of the upper mold | type with which the flame | frame was fixed. It is a fragmentary perspective view which shows the shaping | molding die in 3rd Embodiment, and the hook provided in the flame | frame. It is a fragmentary perspective view which shows the shaping | molding die in 4th Embodiment, and the hook provided in the flame | frame. It is a fragmentary perspective view which shows the shaping | molding die in 5th Embodiment, and the hook provided in the flame | frame.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of the seat pad 10 according to the first embodiment viewed from the bottom surface side, and FIG. 2 is a perspective view of the seat pad 10 in which a portion indicated by II in FIG. 1 is enlarged. The seat pad 10 is a base material of a seat to be mounted on a vehicle, and includes a horizontally long pad body 11 formed from a foamed resin such as a flexible urethane foam, a frame 12 embedded in the bottom surface side of the pad body 11, and a frame 12 and a hook 15 that protrudes from the bottom surface of the pad main body 11.

  The frame 12 is a member embedded along the outer edge of the bottom surface of the pad main body 11 in order to prevent the pad main body 11 from being improved in rigidity, out of shape, etc., and is formed in an oval shape by bending a wire such as a metal wire. Yes. The frame 12 connects a pair of linear first portions 13 embedded along the front and rear edges (long sides) of the pad main body 11 and both ends of the first portion 13 to the left and right edges ( And a pair of arc-shaped second portions 14 respectively embedded along the short side.

  The hook 15 is a part for attaching the pad main body 11 to the vehicle, and is formed by bending a metal wire into a substantially U shape. The leg portions 16 are a pair of portions for attaching the hook 15 to the frame 12 (first portion 13), and are formed by bending both end portions of the wire material forming the hook 15 approximately 90 ° in the same direction. The hook 15 is fixed to the frame 12 by joining the leg portion 16 to the frame 12 (first portion 13) by welding or the like.

  Next, with reference to FIG. 3, the shaping | molding die 20 for manufacturing the seat pad 10 is demonstrated. FIG. 3 is a perspective view of the mold 20 and the frame 12. The molding die 20 includes a lower die 30 and an upper die 40 provided so that the die can be closed with respect to the lower die 30. The lower mold 30 is formed with a concave molding surface 31 that opens upward, and the upper mold 40 is formed with a concave molding surface 41 that forms a cavity 49 (see FIG. 6) with the molding surface 31 of the lower mold 30. Has been. The molding surface 41 includes a fixing portion 42 that fixes the frame 12 and a concave portion 43 into which the hook 15 provided on the frame 12 is inserted.

  The fixing part 42 is a part for fixing the frame 12 to the upper mold 40 by providing a gap with the molding surface 41, and is spaced apart from each other along the outer edges (a pair of long sides) of the molding surface 41. It is provided and protrudes from the molding surface 41. In the present embodiment, a permanent magnet is provided at the protruding end of the fixing portion 42, and the fixing portion 42 attracts and fixes the frame 12 by its magnetic force.

  Next, the structure of the upper mold 40 will be described in detail with reference to FIGS. 4 is a partial perspective view showing the upper die 40 with the recess 43 enlarged and the hook 15 provided on the frame 12. FIG. 5 shows the molding die 20 (upper die 40) to which the frame 12 is fixed. 6 is a partial plan view, FIG. 6 is a cross-sectional view of the mold 20 taken along line VI-VI in FIG. 5, and FIG. 7 is a cross-sectional view of the mold 20 taken along line VII-VII in FIG. 6 and 7 illustrate a state where the lower mold 30 and the upper mold 40 are closed.

  As shown in FIG. 4, the hook 15 is formed to be bent in an L shape with respect to the leg part 16, and the frame 12 (first part 13) is a predetermined part of the leg part 16 facing the bending direction of the hook 15. It is joined to the place. The recess 43 is a recess into which the hook 15 is inserted when the frame 12 is fixed to the molding surface 41 of the upper mold 40 by the fixing portion 42. By forming the recess 43 in the molding surface 41, an opening 44 that opens to the molding surface 41 is formed in the molding surface 41. In the present embodiment, the recesses 43 are formed at two locations on both sides of the long side of one of the pair of long sides (outer edges) of the molding surface 41 (the hinge side connecting the lower mold 30 and the upper mold 40). Yes.

  As shown in FIG. 4 to FIG. 7, the recess 43 and the opening 44 are set to a size that allows the hook 15 to be inserted with play. In the present embodiment, the recess 43 is a bottomed depression formed in a closed state from the molding surface 41 to a predetermined depth with the opening 44 having a rectangular shape on the molding surface 41 and having the same shape as this opening shape. is there. The opening 44 is formed in a horizontally long rectangular shape in accordance with the horizontally long oval molding surface 41. The opening 44 is surrounded by a weir 45.

  The weir 45 is a part for preventing the inflow of the foamed resin into the recess 43 and the outflow of the gas from the recess 43, and protrudes from the molding surface 41. The dam 45 includes a pair of first dams 46 provided along a pair of long sides of the rectangular opening 44 and a pair of second dams 47 provided along a pair of short sides of the opening 44. ing. The first dam 46 and the second dam 47 surround the periphery of the opening 44 over the entire length.

  The weir 45 is provided with a groove 48. The groove portion 48 is a portion that is cut from the protruding end 46 a of the first weir 46 toward the molding surface 41 and along the thickness direction of the first weir 46. In the present embodiment, two groove portions 48 are formed in accordance with the number of leg portions 16. The groove portion 48 is set such that the width and the depth from the protruding end 46 a are slightly larger than the diameter of the leg portion 16. Accordingly, when the hook 15 is inserted into the recess 43, the leg portion 16 (the portion between the hook 15 and the first portion 13) is accommodated in the groove portion 48. As a result, the hook 15 can be positioned in the longitudinal direction of the first weir 46 relative to the molding surface 41 (longitudinal direction of the first portion 13 (frame 12)).

  As shown in FIGS. 6 and 7, the height of the weir 45 from the molding surface 41 to the projecting ends 46a and 47a is larger than the total dimension of the diameter of the leg portion 16 and the diameter of the first portion 13 (frame 12). Is set. Thereby, a gap can be provided between the first portion 13 (frame 12) disposed outside the weir 45 and the molding surface 41. Since the foamed resin can enter between the molding surface 41 and the first portion 13 (frame 12), the first portion 13 (frame 12) can be embedded in the pad main body 11.

  As shown in FIG. 7, the weir 45 (first weir 46) is in the in-plane direction (the left-right direction in FIG. 7) of the molding surface 41 along the molding surface 41 with the frame 12 fixed to the molding surface 41. The frame 12 (first portion 13) is provided at an adjacent position. Therefore, when the frame 12 is fixed to the molding surface 41 of the upper mold 40, the weir 45 (first weir 46) protruding from the molding surface 41 can be used as a guide for the fixing position of the frame 12. As a result, the workability of attaching the frame 12 to the molding surface 41 can be improved.

  Next, a method for manufacturing the seat pad 10 using the mold 20 will be described. First, as shown in FIG. 3, the upper mold 40 is released from the lower mold 30, and the frame 12 provided with the hook 15 is fixed to the fixing portion 42 provided on the molding surface 41 of the upper mold 40. At this time, the hook 15 provided on the frame 12 was inserted into the recess 43 formed on the molding surface 41, and the leg portion 16 provided on the frame 12 was formed on the weir 45 (first weir 46). Insert into the groove 48. The groove 48 positions the frame 12 with respect to the longitudinal direction of the molding surface 41 (arrow L direction in FIG. 5), and the fixing portion 42 positions the frame 12 with respect to the short side of the molding surface 41 (arrow S direction in FIG. 5). Is done.

  After the frame 12 is fixed to the upper mold 40, a predetermined amount of foaming raw material (liquid raw material of foamed resin) is injected into the molding surface 31 of the lower mold 30, and when the injection of the foaming raw material is completed, the upper mold 40 and the lower mold 30 Close the mold. In the cavity 49 (see FIGS. 6 and 7) formed by the molding surface 41 of the upper mold 40 and the molding surface 31 of the lower mold 30, the foaming raw material is reacted and foamed. The liquid raw material being foamed rises while expanding in the cavity 49, and comes into contact with the protruding ends 46 a and 47 a of the weir 45 before reaching the molding surface 41 of the upper mold 40. When the foaming raw material being foamed is brought into contact with the entire circumference of the protruding ends 46 a and 47 a of the weir 45, the concave portion 43 is sealed from below and air and gas are confined in the concave portion 43.

  The foaming raw material being foamed continues to expand after contacting the protruding ends 46 a and 47 a of the weir 45 and contacts the molding surface 41 of the upper mold 40. The foaming material in contact with the molding surface 41 of the upper mold 40 is gradually cured in a state where entry into the recess 43 is restricted by air or gas confined in the recess 43. In addition, since the groove part 48 formed in the weir 45 (first weir 46) is closed by the leg part 16, the foaming raw material flows into the concave part 43 from the groove part 48, or the gas in the concave part 43 flows out from the groove part 48. Can be suppressed.

  Thereby, when the foaming raw material is cured in the cavity 49 and the molding of the pad main body 11 is completed, a part of the pad main body 11 (foamed resin) does not adhere to the hook 15. Since the hook 15 can be protruded from the pad main body 11 without the foamed resin adhering thereto, the seat pad 10 can be easily attached using the hook 15. Further, it is possible to eliminate the work of stripping off the foamed resin adhering to the hook 15 after molding or attaching a sealing material (adhesion preventing material) to the hook 15 before molding so that the foamed resin does not adhere.

  In addition, since the hook 15 is inserted into the recess 43 with play, a gap is formed between the hook 15 and the inner periphery of the opening 44. Therefore, it is possible to prevent the foaming raw material from entering the recess 43 due to the capillary phenomenon that travels through the gap formed between the hook 15 and the opening 44.

  Further, the positioning of the frame 12 and the hook 15 with respect to the longitudinal direction of the molding surface 41 (the direction of the arrow L in FIG. 5) is performed by the groove portion 48, so that the positional accuracy of the hook 15 protruding from the molded pad body 11 (particularly the pad body). 11) (positional accuracy with respect to the longitudinal direction).

  Further, by inserting the leg portion 16 into the groove portion 48, the first weir 46 (the weir 45) and the first portion 13 (the frame 12) are adjacent to each other in the in-plane direction of the molding surface 41 (the left-right direction in FIG. 7). Therefore, the movement of the first portion 13 along the in-plane direction of the molding surface 41 (particularly, the short side direction of the pad main body 11 (arrow S direction)) can be restricted by the first dam 46. Therefore, the positional accuracy of the hook 15 with respect to the short direction of the pad main body 11 can be ensured.

  In the state where the frame 12 is fixed to the molding surface 41, it is not necessary that the outer periphery of the first weir 46 (weir 45) and the first portion 13 (frame 12) are in contact with each other. Even when the first dam 46 and the first portion 13 are not in contact, when the frame 12 is fixed to the molding surface 41, the dam 45 (first dam 46) protruding from the molding surface 41 is fixed to the frame 12. This is because it can be used as a guideline. However, when the outer periphery of the first dam 46 and the first portion 13 come into contact with each other in a state where the frame 12 is fixed to the molding surface 41, the first dam 46 follows the short direction (arrow S direction) of the molding surface 41. This is preferable because the movement of the first portion 13 can be restricted.

  If the groove portion 48 is not formed in the weir 45 (first weir 46), the position of the hook 15 with respect to the longitudinal direction of the pad main body 11 is the hook 15 inserted into the recess 43 and the recess 43 (the length of the opening 44). Direction) and the amount of play. The position of the hook 15 protruding from the pad main body 11 varies by the amount of play. Since the hook 15 is a part that is fixed to a seat frame or the like installed in the vehicle, the mounting accuracy (position accuracy) of the pad main body 11 fixed to the seat frame or the like of the vehicle is lowered due to the variation in the position of the hook 15. . On the other hand, according to the present embodiment, the positions of the legs 16 and the hooks 15 are regulated by the grooves 48 formed in the weir 45 (first weir 46). The accuracy (particularly the positional accuracy with respect to the longitudinal direction of the pad main body 11) can be improved.

  Next, a second embodiment will be described with reference to FIGS. In the first embodiment, the case where the position of the hook 15 is regulated with respect to the longitudinal direction of the pad main body 11 by the groove portion 48 formed in the weir 45 has been described. In contrast, in the second embodiment, a case will be described in which the position of the hook 15 is restricted not only in the longitudinal direction of the pad body 11 but also in the lateral direction. In addition, about the part same as the part demonstrated in 1st Embodiment, the same code | symbol is provided and the following description is abbreviate | omitted. FIG. 8 is a perspective view of the molding die 120 according to the second embodiment, and FIG. 9 is a partial perspective view showing the upper die 140 with the recessed portion 143 enlarged and the hook 115 provided on the frame 12. FIG. 10 is a partial plan view of the upper mold 140 to which the frame 12 is fixed. In FIG. 10, the intermediate portion of the second portion 14 of the frame 12 is not shown.

  As shown in FIGS. 8 and 9, the hook 115 is formed by bending a metal wire into a substantially U shape, and both ends of the wire forming the hook 115 are bent in an L shape in the same direction, Legs 116 are formed. The hook 115 is fixed to the frame 12 by joining the leg part 116 to the frame 12 (second part 14) by welding or the like.

  The molding die 120 includes a lower die 30 and an upper die 140 that can be closed with respect to the lower die 30. The upper mold 140 has a concave molding surface 41 that forms a cavity (not shown) with the molding surface 31 of the lower mold 30. The molding surface 41 includes a fixing portion 42 that fixes the frame 12 and concave portions 43 and 143 into which hooks 15 and 115 provided on the frame 12 are inserted.

  As shown in FIGS. 9 and 10, the recess 143 is a recess into which the hook 115 is inserted when the frame 12 is fixed to the molding surface 41 of the upper mold 40 by the fixing portion 42, and the recess 143 is formed in the molding surface 41. An opening 144 that opens to the molding surface 41 is formed in the molding surface 41 by being recessed. The concave portions 43 and 143 are formed at two places on both sides of the short side of the molding surface 41, and the concave portion 143 and the opening portion 144 are set to a size that allows the hook 115 to be inserted with play. In the present embodiment, the opening 144 is formed in a vertically long rectangular shape with respect to the horizontally long oval molding surface 41. The opening 144 is surrounded by a weir 145.

  The weir 145 is a part for preventing the inflow of the foamed resin into the recess 143 and the outflow of the gas from the recess 143, and protrudes from the molding surface 41. The dam 145 includes a pair of first dams 146 provided along a pair of long sides of the rectangular opening 144 and a pair of second dams 147 provided along a pair of short sides of the opening 144. ing. The first weir 146 and the second weir 147 surround the periphery of the opening 144 over the entire length.

  The weir 145 is provided with a groove 148 and a notch 149. The groove portion 148 is a portion that is cut from the protruding end 146 a of the first weir 146 toward the molding surface 41 and along the thickness direction of the first weir 146. Two grooves 148 are formed in accordance with the number of legs 116. The groove 148 has a width and a depth from the tip that are set slightly larger than the diameter of the leg 116.

  The notch portion 149 is directed from the projecting ends 146a and 147a of the first weir 146 and the second weir 147 to the molding surface 41, and part of the portion where the first weir 146 and the second weir 147 intersect is removed obliquely. It is. The notch 149 is formed at a position where the second portion 14 (frame 12) is arranged across the weir 145. The weir 145 is not formed with a passage (a passage like the groove portion 148 penetrating the weir 145 in the thickness direction) communicating with the notch 149 and the opening 144.

  Accordingly, when the hook 115 is inserted into the recess 143, the leg portion 116 is accommodated in the groove portion 148. As a result, the hooks 15 and 115 can be positioned in the longitudinal direction of the first weir 146 (the longitudinal direction of the second portion 14 (frame 12), that is, the short direction of the pad main body 11) with respect to the molding surface 41.

  The weir 145 has an in-plane direction of the molding surface 41 along the molding surface 41 (parallel to the paper surface of FIG. 10) in a state where the second portion 14 (frame 12) is arranged in the notch 149 and the frame 12 is fixed to the molding surface 41. The frame 12 (the first portion 14) is provided in a position adjacent to the direction. Therefore, when the frame 12 is fixed to the molding surface 41 of the upper mold 40, the weir 145 (notch portion 149) protruding from the molding surface 41 can be used as a guide for the fixing position of the frame 12. As a result, the workability of attaching the frame 12 to the molding surface 41 can be improved.

  Further, since the notch 149 is formed in the weir 145, it is not necessary to change the shape of the frame 12 (second portion 14) depending on the position of the weir 145. Since the shape of the frame 12 (second portion 14) can be prioritized over the position of the weir 145, it is possible to ensure the degree of freedom in designing the frame 12 to prevent the pad main body 11 from being improved in rigidity or out of shape.

  The groove portion 148 is formed at a position where a plurality of virtual straight lines L1, L2 obtained by extending the leg portions 16, 116 inserted into the groove portions 48, 148 in the in-plane direction of the molding surface 41 are non-parallel. In the present embodiment, groove portions 48 and 148 are formed at positions where virtual straight lines L1 and L2 are substantially orthogonal to each other. As a result, the leg portions 16 and 116 inserted into the groove portions 48 and 148 can be restricted from moving in the short direction (arrow S direction in FIG. 10) and the long direction (arrow L direction in FIG. 10) of the molding surface 41. The grooves 48 and 148 position the frame 12 and the hooks 15 and 115 with respect to the short side direction (arrow S direction) and the long side direction (arrow L direction) of the molding surface 41, and thus protrude from the molded pad main body 11. The positional accuracy of the hooks 15 and 115 (the positional accuracy of the pad main body 11 with respect to the longitudinal direction and the lateral direction) can be improved.

  Next, a third embodiment will be described with reference to FIG. In the second embodiment, the grooves 48 and 148 are formed in the first weirs 46 and 146 of the recesses 43 and 143 formed on the molding surface 41 of the upper mold 140, respectively. The case where the frame 12 and the hooks 15 and 115 are positioned with respect to the direction has been described. On the other hand, in the third embodiment, the groove portion 248 is formed in the weir 245 (the first weir 246 and the second weir 247) of the recess 243 formed on the molding surface 41 of the upper mold 240, so that the molding surface 41 The case where the frame 12 and the hook 215 are positioned with respect to the short side direction and the long side direction will be described. In addition, about the part same as the part demonstrated in 1st Embodiment, the same code | symbol is provided and the following description is abbreviate | omitted. FIG. 11 is a partial perspective view showing a molding die (upper die 240) and a hook 215 provided on the frame 12 in the third embodiment.

  As shown in FIG. 11, the hook 215 is formed by bending a metal wire into a substantially U shape, and one end of the wire forming the hook 215 is bent into an L shape so that the leg portion 216 is formed. It is formed. The other end portion of the hook 215 is bent in a direction orthogonal to the one end portion, and is further bent by approximately 90 ° so as to be parallel to the leg portion 216, whereby the leg portion 217 is formed. . The legs 216 and 217 are located in a virtual plane orthogonal to the hook 215. The hooks 215 are fixed to the frame 12 by joining the legs 216 and 217 to the frame 12 (first portion 13) by welding or the like.

  The recess 243 is a recess into which the hook 215 is inserted, and is formed on the molding surface 41 of the upper mold 240. The periphery of the opening 244 of the recess 243 that opens to the molding surface 41 is surrounded by a weir 245. The dam 245 includes a pair of first dams 246 provided along a pair of long sides of the rectangular opening 244 and a pair of second dams 247 provided along a pair of short sides of the opening 244. Groove portions 248 and 249 are formed in the first weir 246 and the second weir 247, respectively. The groove part 248 is a part into which the leg part 216 is inserted, and the groove part 249 is a part into which the leg part 217 is inserted.

  When the leg portions 216 and 217 are inserted into the groove portions 248 and 249, the leg portions 216 and 217 in the direction parallel to the first portion 13 (frame 12) and the direction orthogonal to the first portion 13 are inserted by the groove portions 248 and 249. Movement is restricted. Since the position accuracy of the hook 215 arranged with respect to the molding surface 41 can be improved by the grooves 248 and 249, the hook 215 can be arranged on the pad main body (not shown) with high accuracy.

  Next, a fourth embodiment will be described with reference to FIG. In the first to third embodiments, the case where the frame 12 is fixed to the legs 16, 116, 216, 217 extending in the same direction has been described. In contrast, in the fourth embodiment, a case will be described in which the first portion 13 and the connecting member 313 are fixed to leg portions 316 and 317 extending in opposite directions. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 12 is a partial perspective view showing a molding die (upper die 340) and a hook 315 provided on the frame 312 in the fourth embodiment.

  As shown in FIG. 12, the hook 315 is formed by bending a metal wire into a substantially U shape, and one end of the wire forming the hook 315 is bent into an L shape so that a leg 316 is formed. It is formed. The other end portion of the hook 315 is bent in an L shape in a direction parallel to and opposite to the one end portion, so that a leg portion 317 is formed. The leg portions 316 and 317 are located in a virtual plane orthogonal to the hook 315.

  The frame 312 includes a linear first portion 13 and a connecting member 313 which is disposed substantially parallel to the first portion 13 and whose both ends are fixed to the arc-shaped second portion 14 (not shown) by welding or the like. It has. The hooks 315 are fixed to the frame 312 by joining the leg portions 316 and 317 to the first portion 13 and the reinforcing member 313 by welding or the like.

  The recess 343 is a recess into which the hook 315 is inserted, and is formed on the molding surface 41 of the upper mold 340. The opening 344 of the recess 343 that opens to the molding surface 41 is surrounded by a weir 345. The weir 345 includes a pair of first weirs 346 provided along a pair of long sides of the rectangular opening 344 and a pair of second weirs 347 provided along a pair of short sides of the opening 344. Grooves 348 and 349 are formed in the pair of first dams 346, respectively. The groove part 348 is a part into which the leg part 316 is inserted, and the groove part 349 is a part into which the leg part 317 is inserted.

  When the leg portions 316 and 317 are inserted into the groove portions 348 and 349, the movement of the leg portions 316 and 317 in the direction parallel to the first portion 13 is restricted by the groove portions 348 and 349. Since the positional accuracy of the hook 315 disposed with respect to the molding surface 41 can be improved by the groove portions 348 and 349, the hook 315 can be accurately disposed on the pad main body (not shown).

  Next, a fifth embodiment will be described with reference to FIG. In the first to fourth embodiments, the case where the hooks 15, 115, 215, 315 are joined to the frames 12, 312 via the legs 16, 116, 216, 217, 316, 317 by welding or the like has been described. . On the other hand, in the fifth embodiment, a case where the hook 415 is formed by bending a wire constituting the frame 412 will be described. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 13 is a partial perspective view showing a molding die (upper die 440) and hooks 415 provided on the frame 412 in the fifth embodiment.

  As shown in FIG. 13, the hook 415 is formed by bending a metal wire constituting the linear first portion 413 of the frame 412 into a substantially U shape. In the present embodiment, the portion of the first portion 413 near the hook 415 constitutes a leg portion.

  The recess 443 is a recess into which the hook 415 is inserted, and is formed on the molding surface 41 of the upper mold 440. The opening 444 of the recess 443 that opens to the molding surface 41 is surrounded by a weir 445. The dam 445 includes a pair of first dams 446 provided along a pair of long sides of the rectangular opening 444 and a pair of second dams 447 provided along a pair of short sides of the opening 444. A groove portion 448 is formed in each of the pair of second dams 447. The groove portion 448 is a portion into which a portion (leg portion) in the vicinity of the hook 415 of the first portion 413 is inserted.

  When the first part 413 is inserted into the groove part 448, the movement of the hook 415 in the direction orthogonal to the first part 413 is restricted by the groove part 448. Since the position accuracy of the hook 415 disposed with respect to the molding surface 41 can be improved by the groove portion 448, the hook 415 can be accurately disposed on the pad main body (not shown).

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed. For example, the shape of each member mentioned in the above embodiment is an example, and it is naturally possible to deform each member into another shape.

  In each of the above embodiments, the case where the frames 12, 312, 412 are attracted and fixed by the magnetic force of the fixing portion 42 provided on the molding surface 41 of the upper mold 40, 140, 240, 340, 440 has been described. It is not limited to this. For example, instead of the permanent magnet provided at the protruding end of the fixing portion 42, a groove into which the frame 12, 312 or 412 (wire) is inserted is provided at the protruding end of the fixing portion 42, and the frame 12, 312 or 412 is engaged with the groove. It is naturally possible to fix them together.

  Further, instead of the fixing portion 42 provided on the molding surface 41 (the fixing portion 42 is omitted), the groove portions 48, 148, 248, 249, 348, 349 provided in the weirs 45, 145, 245, 345, 445, It is naturally possible to fix the frames 12, 312, and 412 using 448. In that case, the legs 16, 116, 216, 217, 316, 317 are inserted into the grooves 48, 148, 248, 249, 348, 349, 448 provided in the weirs 45, 145, 245, 345, 445. The widths of the grooves 48, 148, 248, 249, 348, 349, and 448 and the outer diameters of the legs 16, 116, 216, 217, 316, and 317 are set in advance. The number and arrangement of the groove portions can be appropriately set so that the legs 12, 116, 216, 217, 316, 317 can be held and the frames 12, 312 and 412 can be fixed.

  Further, instead of the fixing portion 42 provided on the molding surface 41 (the fixing portion 42 is omitted), the hooks 15 are connected to the recesses 43, 143, 243, 343, and 443 using the elasticity of the frames 12, 312, and 412. 115, 215, 315, and 415 and the frames 12, 312, and 412 can be fixed to the upper molds 40, 140, 240, 340, and 440 as a matter of course.

  In the second embodiment and the third embodiment, the case where the leg portions 16, 116, 216, and 217 inserted in the groove portions 48, 148, 248, and 249 are arranged in directions orthogonal to each other has been described. It is not necessarily limited to this. Since the movement of the hooks 15 and 115 in the in-plane direction of the molding surface 41 can be restricted with the legs inserted in the grooves, the legs 16, 116, and 216 inserted in the grooves 48, 148, 248, and 249 are used. The positional relationship of 217 (the positional relationship of the virtual straight line passing through the legs) may be non-parallel to each other. As long as they are not parallel, the plurality of virtual straight lines L1 and L2 do not need to be located in the same plane, and the plurality of virtual straight lines may be in a twisted position.

  In the first embodiment and the fourth embodiment, the case where the two legs 16, 316, and 317 are arranged in parallel to each other has been described. However, the present invention is not necessarily limited to this. The two legs 16, 316, 317 are arranged so as to be non-parallel to each other, and the grooves 48, 348, 349 are formed so that the legs 16, 316, 317 are inserted without play. Of course it is possible. Thereby, not only the movement of the hooks 15 and 315 in the direction parallel to the first part 13 can be restricted, but also the movement of the hooks 15 and 315 in the direction orthogonal to the first part 13 can be restricted.

  In each of the above embodiments, the case where weirs are formed around all the concave portions has been described, but the present invention is not necessarily limited thereto. The weir is only required to be provided in a recess where the problem of foaming resin adhering to the hook occurs. Further, it is not necessary that grooves are formed in the weirs around all the recesses, and weirs effective for regulating the position of the frame with respect to the molding surface of the upper mold (for example, 2 to 4 located near the outer edge of the molding surface). It suffices if a groove portion is formed in the weirs of about a portion.

DESCRIPTION OF SYMBOLS 10 Seat pad 11 Pad main body 12,312,412 Frame 15,115,215,315,415 Hook 16,116,216,217,316,317 Leg 20 Mold 30 Lower mold 40,140,240,340,440 Upper die 41 Molding surface 43,143,243,343,443 Recess 44,144,244,344,444 Opening 45,145,245,345,445 Weir 46,146,246,346,446 First weir (weir Part of
46a, 146a Tip 47, 147, 247, 347, 447 Second weir (part of weir)
47a, 147a Tip 48, 148, 248, 249, 348, 349, 448 Groove 49 Cavity
149 notch

Claims (3)

Molding for molding a seat pad comprising a pad body formed of foamed resin, a frame embedded in the pad body, a hook projecting to the outside of the pad body, and a leg portion connecting the hook and the frame Type,
With the lower mold,
An upper mold for forming a cavity for molding the pad body between the lower mold and the lower mold;
An opening is formed on the molding surface of the upper mold that forms the cavity, and a recess that receives the hook provided on the frame from the opening with the frame fixed to the molding surface;
A dam that surrounds the periphery of the opening formed in the molding surface and protrudes from the molding surface;
A part of the weir is cut out from the protruding end of the weir toward the molding surface, and the leg portion provided on the frame is inserted in a state where the frame is fixed to the molding surface. A groove ,
A notch in which a part of the outer periphery of the weir is cut away from the protruding end of the weir toward the forming surface, and a part of the frame is arranged in a state where the frame is fixed to the forming surface. And comprising
The hook is formed to be bent in an L shape with respect to the leg portion, and the frame is fixed to a predetermined portion of the leg portion facing the bending direction of the hook,
The mold is characterized in that the dam is provided at a position adjacent to the frame in the in-plane direction of the molding surface in a state where the frame is fixed to the molding surface . A plurality of the groove portions are formed in the weir,
The groove portion is formed at a position where a plurality of virtual straight lines obtained by extending a plurality of the leg portions inserted into the plurality of groove portions in an in-plane direction of the molding surface are non-parallel. The mold according to claim 1 . Molding for molding a seat pad comprising a pad body formed of foamed resin, a frame embedded in the pad body, a hook projecting to the outside of the pad body, and a leg portion connecting the hook and the frame A method of manufacturing a seat pad using a mold,
The mold is a lower mold,
An upper mold for forming a cavity for molding the pad body between the lower mold and the lower mold;
An opening is formed on the molding surface of the upper mold that forms the cavity, and a recess that receives the hook provided on the frame from the opening with the frame fixed to the molding surface;
A dam that surrounds the periphery of the opening formed in the molding surface and protrudes from the molding surface;
A part of the weir is cut out from the protruding end of the weir toward the molding surface, and the leg portion provided on the frame is inserted in a state where the frame is fixed to the molding surface. A groove ,
A notch in which a part of the outer periphery of the weir is cut away from the protruding end of the weir toward the forming surface, and a part of the frame is arranged in a state where the frame is fixed to the forming surface. And comprising
The frame is fixed to the molding surface while disposing a part of the frame in the notch, and the leg provided on the frame is received while the hook provided on the frame is received in the recess. An insertion step of inserting into the groove portion of the weir provided around the opening;
A foam curing step of closing the lower mold and the upper mold and foam-curing a liquid foam raw material in the cavity ,
The hook is formed to be bent in an L shape with respect to the leg portion, and the frame is fixed to a predetermined portion of the leg portion facing the bending direction of the hook,
The method of manufacturing a seat pad, wherein the weir is provided at a position where the frame is adjacent in an in-plane direction of the molding surface in a state where the frame is fixed to the molding surface .

Images