JP5437712B2 - Vehicle seat and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vehicle seat such as an automobile in which a skin material covering a seat pad is suspended in a suspension groove and a method for manufacturing the same.

  As a vehicle seat for an automobile or the like, a polyurethane foam seat pad covered with a skin material is generally used. As shown in FIG. 9, the seat pad 70 has an uneven shape such that the left and right side portions 74 and 76 are raised compared to the central portions 73 and 75 in both the seating portion 71 and the backrest portion 72. Yes. When the skin material is lifted at the concave portion such as the boundary between the central portions 73 and 75 and the side portions 74 and 76, not only the appearance of the vehicle seat is deteriorated but also unstable along the seat pad 70. A feeling of use worsens by the skin material in a state. For this reason, the skin material is suspended in the suspension grooves 77 and 78 so that the skin material does not float up.

  In the “sheet provided with a heater” disclosed in Patent Document 1, a tough material trim cord having a long belt shape is joined to a skin material, and a key-like protrusion provided at the tip of the trim cord The portion is locked to a locking member provided in the groove of the cushion material.

  The “seat cover suspension structure” disclosed in Patent Document 2 is a structure capable of efficiently fixing the suspension bag of the seat cover to the groove portion of the mold pad. In this structure, a clip is used which is made of an elastic material and includes a guide claw formed in a warped shape and a hook claw having a hook portion with which a tip abuts against the guide claw. And the wire inserted in the hanging bag is locked by the hook claw.

Japanese Utility Model Publication No. 4-36684 (see page 2, left column, [FIG. 1B]) Japanese Utility Model Publication No. Hei 6-58800 (see [Summary], Detailed Description of Invention [0006], [FIG. 2])

  In the seat of Patent Document 1, when the skin member is pushed downward by the occupant's body, the trim cord joined to the skin member also moves downward, so the head of the trim cord passes through the locking member. Will move. Then, when the skin member is pressed, the suspended portion of the skin material may be displaced in the direction of the hanging groove. In addition, when the frictional sound between the trim cord and the locking member is generated or the pressing of the skin material is repeated, there is a continuous sound of collision between the head of the trim cord that repeatedly moves downward and the locking member. It occurs.

  A plurality of clips of Patent Document 2 are arranged at predetermined intervals along the longitudinal direction at the bottom of the groove portion of the mold pad, and a part of the base plate in which guide claws and hook claws are erected is embedded in the mold pad. ing. Then, the wire for hanging the skin material is locked to the guide claw and the hook claw exposed in the groove using a tool. However, in order to suspend the skin material, a force that resists the frictional force between the skin material and the seat pad is required. For this reason, a bulky and heavy tool must be used, and the work is difficult. is there. In addition, as in the relationship between the trim cord and the locking member, it is possible to prevent the suspended portion of the skin material from shifting in the direction of the hanging groove or the generation of an annoying sound between the wire and the clip. difficult.

  The present invention has been made paying attention to such a problem. The object of the present invention is to disengage the direction of the suspending groove and to give an annoying sound to the locking tool provided in the suspending groove. An object of the present invention is to provide a vehicle seat in which an outer skin material is locked in a state in which the occurrence of the above is prevented and a method for manufacturing the same.

  In order to solve the above problem, the vehicle seat invention according to claim 1 is provided with a vehicle seat provided with a locking tool for locking a hanging piece for hanging the skin material of the seat pad in the hanging groove. The locking device is composed of a substrate embedded in the seat pad and a pair of locking pieces formed on the substrate, and a synthetic resin in which the seat pad is formed on the inner surface of the locking piece The coating part of the hardened | cured material of the raw material is formed.

  According to the said structure, the coating | coated part of the hardening body of the synthetic resin raw material which formed the seat pad in the inner surface of the latching piece was formed. For this reason, when the skin material is suspended and the suspension piece is engaged with the engagement tool, the covering portion is interposed between the engagement piece and the suspension piece when the suspension piece is sandwiched between the engagement pieces. Then, unlike the case where the hanging piece directly contacts the locking piece, the hanging piece receives the frictional force due to the contact with the coating portion of the synthetic resin raw material and can move within the locking piece. Is prevented. Therefore, it is possible to prevent generation of annoying sound caused by the suspending piece and the locking piece rubbing or colliding with each other.

According to a second aspect of the present invention, in the vehicle seat according to the first aspect, the covering portion is a foam.
According to the said structure, the coating | coated part was formed with the foam which the synthetic resin raw material foam-hardened. For this reason, when the suspension piece is disposed in the engagement piece, the suspension piece can be more securely held by the engagement piece via the covering portion due to the elasticity of the foam.

According to a third aspect of the present invention, in the vehicle seat according to the first or second aspect, the locking member has anchor portions formed at both ends of the substrate.
According to the above configuration, since the substrate is embedded in the seat pad together with the anchor portion, even if a force acts on the locking tool in the direction of detachment from the seat pad via the suspension piece, the locking tool is used as the seat pad. You can keep it.

  According to a fourth aspect of the present invention, in the vehicle seat according to any one of the first to third aspects, a plurality of the locking tools are connected at intervals arranged in the hanging groove. It is connected by the part, It is characterized by the above-mentioned.

  According to the said structure, when setting a locking tool to a shaping | molding die, a man-hour can be reduced compared with the case where a locking tool is set one by one. Further, it is possible to prevent the displacement of the locking tool caused by the vibration applied to the mold.

  According to a fifth aspect of the present invention, in the vehicle seat according to any one of the first to fourth aspects, the engaging member is a synthetic resin molded product, and the engagement part is formed. The stopper is characterized in that it is subjected to an easy adhesion treatment.

  According to the said structure, even if it uses a difficult-to-adhere synthetic resin with respect to the synthetic resin raw material which forms a seat pad, it becomes easy to form a coating | coated part in a latching piece with the adhesiveness of a synthetic resin raw material. In addition, the covering portion can be prevented from falling off from the locking piece.

  According to a sixth aspect of the present invention, in the vehicle seat according to any one of the first to fifth aspects of the present invention, the suspension piece has a belt-like shape having a ridge having an increased plate thickness at one side end. It is a body, The protrusion part has fitted in the inner side of a pair of locking piece of the said locking tool, It is characterized by the above-mentioned.

According to the above configuration, unlike the case where the wire is locked to the locking piece using a tool, the suspension piece may be pushed into the locking piece via the stitched portion of the skin material, so that the work can be easily performed. it can.
The invention of the vehicle seat manufacturing method according to claim 7 is the vehicle seat manufacturing method according to any one of claims 1 to 6, wherein the seat pad is formed by a molding die. When setting the locking tool on the small protrusion of the protrusion that forms the hanging groove, a gap that allows the synthetic resin raw material to enter is generated between the locking piece and the small protrusion, A synthetic resin raw material is intruded into the gap to form a covering portion.

  According to the above configuration, when the seat pad is molded, the synthetic resin raw material is allowed to enter between the locking piece and the small protrusion through the gap, so that the inner surface of the locking piece can be easily covered with the synthetic resin cured body. Can be formed.

  According to the present invention, since the covering portion made of the synthetic resin material having the seat pad formed on the inner surface of the locking piece, the hanging piece is prevented from moving due to friction with the covering portion, and is suspended. It is possible to provide a vehicle seat in which a shift of the skin material in the direction of the groove and generation of an annoying sound between the hanging piece and the locking piece are prevented.

Sectional drawing which shows the groove part for suspension provided with the locking tool of 1st Embodiment. The perspective view which shows the locking tool of 1st Embodiment. Sectional drawing which shows the state by which the skin material was suspended by the locking tool of 1st Embodiment. The perspective view which shows a part of shaping | molding die which shape | molds the vehicle seat 1 of 1st Embodiment. The front view which shows the state by which the locking tool of 1st Embodiment was set to the shaping | molding die. Sectional drawing of AA- arrow in FIG. Sectional drawing which shows the groove part for suspension provided with the locking tool of 2nd Embodiment. Sectional drawing which shows the groove part for suspension in which the latching tool of 3rd Embodiment was provided. The perspective view which shows the seat pad as a prior art.

(First embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, in the vehicle seat 1 of the present embodiment, the synthetic resin molded article locking tool 4 is a synthetic resin foam seat pad 2 in which a substrate 41 having anchor portions 6 formed at both ends is provided. It is provided in the bottom part of the groove | channel 3 for suspension in the state embed | buried in.

  As shown in FIG. 2, the locking tool 4 of this embodiment is made of polyethylene (PE) and is an integrally molded product in which two pieces are connected by a connecting portion 44. Each locking tool 4 includes a flat board 41 and a pair of locking pieces 40 erected at the center of the board 41. The locking piece 40 is formed by a standing piece 42 that is inclined outward, and a protruding piece 43 that projects inward from the tip of the standing piece 42. Standing plates 61 are erected in the vicinity of both ends of the substrate 41, and a swash plate 62 is formed on the outer side in a direction oblique to the substrate 41 from the tip of the standing plate 61. The swash plate 62 and the upright plate 61 constitute an anchor portion 6 that prevents the locking tool 4 from being detached from the seat pad 2.

  A covering portion 5 is formed on the inner surface of the pair of locking pieces 40 provided upright on the locking tool 4. In this embodiment, since polyurethane is used as a synthetic resin raw material, the cover portion 5 of the synthetic resin cured body is formed of a polyurethane foam. Further, on the outside of the locking piece 40, a backing portion 21 that backs the outside of the locking piece 40 is formed as a part of the seat pad 2. Thus, unlike the aspect in which the clip in Patent Document 2 completely exposes the guide claw and the hook claw in the hanging groove, the locking tool 4 of the present embodiment includes the pair of projecting pieces 43. Except for the respective inner side surfaces 47, the polyurethane foam covering portion 5 and the backing portion 21 are covered.

  Further, by applying easy adhesion treatment such as primer application, flame treatment, plasma treatment, etc. to the inner surface of the engagement piece 40, the covering portion 5 is also provided in the engagement fixture 4 made of PE that is difficult to adhere to polyurethane. Can be prevented from falling off the locking piece 40. In addition, when the latching tool 4 is formed with an easily adhesive synthetic resin, this easily adhesive treatment becomes unnecessary.

  Next, a mode in which the skin material 7 is locked to the locking tool 4 will be described with reference to FIG. The ends of the two skin materials 7 are joined at the stitching portion 80, and are sewn at the stitching portion 81 with the hanging piece 9 interposed therebetween. The hanging piece 9 is a PE belt-like body, and is provided with a ridge 91 having an increased plate thickness at the end in the longitudinal direction opposite to the side sewn on the skin material 7. The cross-sectional shape of the ridge 91 is a substantially inverted triangle.

  As shown in FIG. 3, the protrusion 91 can be fitted into the locking tool 4 by pushing the hanging piece 9 downward. At this time, the protruding portion 91 is inserted between the left and right locking pieces 40 by expanding the inner side surface 47 of the protruding piece 43 of the locking piece 40 at the tip, and further, the covering portion 5 is compressed. It is clamped between the stop pieces 40. This insertion is performed smoothly because the inner surface 47 of the protrusion 43 exposes the PE skin.

  In this way, the suspension piece 9 is locked inside the pair of locking pieces 40 via the covering portion 5, so that it is difficult to move within the locking piece 40. Accordingly, it is possible to prevent the skin material 7 from being displaced as the suspension piece 9 moves in the direction along the suspension groove 3. Further, it is possible to prevent the occurrence of abnormal noise due to the rubbing piece 9 and the locking piece 40 being directly rubbed.

Furthermore, the manufacturing method of the vehicle seat 1 of this embodiment is demonstrated using FIGS.
As shown in FIGS. 4 and 6, in the mold 10, the protrusion 11 for forming the hanging groove 3 is formed with a small protrusion 15 in the recess 57 between the opposing standing walls 12. Insertion of the locking tool 4 into the mold 10 is performed by fitting the locking piece 40 to the small protrusion 15. The small projecting portion 15 is formed by being connected to a constricted portion 14 erected at the top of two slopes 13 arranged in a high mountain shape at the center, the tip 17 is deflated and the bulging portion on the constricted portion 14 side 16 bulges out. In the locking piece 40 fitted on the small protrusion 15, the top surface 46 of the protrusion 43 abuts the inclined surface 13, and the inner side surface 47 holds the constricted portion 14. Further, the tip 17 of the small protrusion 15 is in contact with the inner bottom 45 on the inner side of the base of the locking piece 40. As described above, the locking device 4 is positioned at three positions with respect to the protruding portion 11, but the two locking devices 4 are connected to each other by the connecting portion 44, thereby being set on the protruding portion 11. The two locking tools 4 are more stably maintained in the set state. That is, even when vibration is applied to the mold 10 that moves on the conveyor, the locking tool 4 can maintain its posture without causing a positional shift.

A gap 55 is provided between the upper surface 18 of the protrusion 11 and the lower surface of the substrate 41. For this reason, the whole substrate 41 together with the anchor portion 6 is embedded in the seat pad 2. Further, in the inner bottom portion 45, a gap 56 that leads to the gap 55 is formed in the vicinity of the left and right of the tip 17 of the small protrusion 15. In the present embodiment, the polyurethane raw material enters from the gap 56 without sealing the gap 56. For this reason, the gap | interval 48 between the small protrusion part 15 and the latching piece 40 can be filled with a polyurethane foam, and the coating | coated part 5 can be formed.

In the arrangement shown in FIG. 5, if the length between the standing walls 12 is longer than the width of the locking tool 4, the polyurethane raw material enters between the locking tool 4 and the standing wall 12 and further enters the gap 48. Therefore, the gap 48 can be effectively filled with the foam.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the polyurethane covering portion 5 in which the seat pad 2 is formed on the inner surface of the pair of locking pieces 40 is formed. For this reason, when the skin material 7 is suspended and the suspension piece 9 is engaged with the engagement tool 4, the protrusion 91 of the suspension piece 9 can be held by the engagement piece 40 via the covering portion 5. Then, unlike the case where the hanging piece 9 directly contacts the locking piece 40, the hanging piece 9 is prevented from moving within the locking piece 40 due to the frictional force caused by contacting the covering portion 5. The Accordingly, it is possible to prevent the skin material 7 from being displaced as the suspension piece 9 moves in the direction along the suspension groove 3. In addition, it is possible to prevent generation of harsh sounds due to friction between the hanging piece 9 and the locking piece 40.

  (2) In the said embodiment, the coating | coated part 5 was formed with the polyurethane foam. For this reason, when the hanging piece 9 is disposed in the locking piece 40, the hanging piece 9 is interposed between the locking pieces 40 via the covering portion 5 due to the elasticity and / or frictional force of the foam. It is clamped more reliably.

  (3) In the said embodiment, the anchor part 6 was formed in the both ends of the board | substrate 41 of the latching tool 4. FIG. For this reason, since the board | substrate 41 is embed | buried in the seat pad 2 with the anchor part 6, even if force acts in the direction which detaches | leaves from the seat pad 2 to the locking tool 4 via the suspension piece 9, the locking tool 4 Can be held on the seat pad 2.

  (4) In the above embodiment, the two locking tools 4 are connected by the connecting portion 44 and integrally molded. For this reason, when setting the locking tool 4 to the shaping | molding die 10, a man-hour can be reduced compared with the case where the locking tool 4 is set one by one. Further, it is possible to prevent the displacement of the locking tool 4 caused by the vibration applied to the mold 10 in advance.

  (5) In the said embodiment, the easily bonding process was performed to the latching piece 40 in which the coating | coated part 5 is formed. For this reason, even if a synthetic resin that is hardly adhesive to polyurethane is used, it is easy not only to form the covering portion 5 on the locking piece 40 due to the adhesive force of the polyurethane, but also the locking piece 40 of the covering portion 5. Can be prevented from falling off.

  (6) In the said embodiment, the hanging piece 9 which suspends the skin material 7 is made into a strip | belt body, and while the skin material 7 was sewn on the one side edge part, the board thickness increased to the edge part on the opposite side Part 91 was formed. Then, the protrusion 91 is inserted into the locking piece 40 so as to be sandwiched between the covering portions 5. For this reason, unlike the case where the wire is locked to the locking tool 4 by using a tool, the hanging piece 9 may be pushed into the locking tool 4 via the stitching portion 80 of the skin material 7, so that the work is easily performed. be able to.

  (7) In the above embodiment, when the locking piece 40 is externally fitted and set to the small projection 15 of the projection 11 that forms the hanging groove 3 in the molding die 10 for molding the vehicle seat 1, A gap 48 that allows entry of the polyurethane raw material is formed between the locking piece 40 and the small protrusion 15. The gap 48 was filled with a polyurethane foam forming the seat pad 2. For this reason, when the seat pad 2 is molded, the covering portion 5 made of polyurethane can be easily formed on the inner surfaces of the pair of locking pieces 40.

(Second Embodiment)
Next, a second embodiment that embodies the present invention will be described with reference to FIG. 7 with a focus on differences from the first embodiment. The locking tool 31 of this embodiment is different only in that it has a locking piece 32 having a different shape from that of the locking piece 40 of the first embodiment, and the other parts are the same, so that the description thereof is omitted. To do.

  As shown in FIG. 7, the pair of locking pieces 32 of the present embodiment includes a flat plate-like piece 33 erected on the substrate 41 and a top surface that is inclined inward and downward at the tip of the stand piece 33. And a projecting piece 34 having 35. The inner shape of the covering portion 5 formed on the inner surface of the locking piece 32 is the same as that of the covering portion 5 of the first embodiment. However, since the thickness 5 of the present embodiment is thick, the compression allowance increases, and the degree of freedom increases in the design of the shape of the protruding ridge 91.

  In addition, a gap is not easily generated between the top surface 35 and the inclined surface 13 of the mold 10, and sufficient sealing can be performed. Therefore, adhesion of polyurethane to the top surface 35 and the inner surface 36 is prevented. Therefore, the top surface 35 and the inner surface 36 remain exposed to the PE skin, the surface slipperiness is maintained, and it is easy to insert the protrusion 91 of the suspension piece 9 into the locking piece 32. be able to.

And in this 2nd Embodiment, in addition to the effect in 1st Embodiment, the following effects can be acquired.
(8) In the above embodiment, the locking piece 32 of the locking tool 31 is configured by the flat plate-like piece 33 and the protruding piece 34 having the inclined top surface 35. For this reason, the coating | coated part 5 which has a big compression allowance can be formed. Further, the sealing between the top surface 35 and the inclined surface 13 of the mold 10 is facilitated, and polyurethane does not easily adhere to the top surface 35 and the inner side surface 36. The slipperiness at the top surface 35 and the inner side surface 36 is maintained, and the locking is achieved. Inserting the protrusion 91 into the tool 31 can be easily performed.

(Third embodiment)
Next, a third embodiment embodying the present invention will be described with reference to FIG. 8 with a focus on differences from the first and second embodiments. In addition, the latching tool 50 of this embodiment differs only in the point which has the latching piece 51 of a different shape from the latching pieces 40 and 32 of the latching tools 4 and 31 of 1st, 2 embodiment. Since other parts are the same, the description thereof is omitted.

  As shown in FIG. 8, the pair of locking pieces 51 according to the present embodiment includes a pair of standing pieces 52 that stand on the substrate 41 and expand to each other, and protrusions that incline inward from the tips of the respective standing pieces 52. It is comprised by the piece 53. FIG. And the shape of the inner side of the latching piece 51 is a substantially rhombus. In addition, a top portion 54 having an inclined surface that can come into contact with the inclined surface 13 of the mold 10 is formed at the tip of each protruding piece 53.

  And the coating | coated part 5 of this embodiment is thick at the center part, and is thin at the upper and lower ends. For this reason, the latching tool 50 becomes suitable as what clamps the protrusion 91 by the frictional force of the coating | coated part 5, when the suspension piece 9 in which the cross-sectional shape of the protrusion 91 makes a substantially rhombus is locked. . In addition, the suspension piece 9 having the substantially rhombic cross-sectional protrusion 91 has a higher bending elastic force and is difficult to bend. Therefore, the suspension piece 9 is superior in operability and easily suspended. 9 can be easily performed.

In the third embodiment, the following effects can be obtained in addition to the effects in the first and second embodiments.
(9) In the above embodiment, the inner shape of the locking piece 51 is substantially rhombus. In addition, the thickness of each of the facing covering portions 5 is made thick at the center portion and thin at the upper and lower ends. For this reason, it is possible to easily engage the suspension piece 9 having the protrusion 91 having a substantially rhombic cross-sectional shape, which is difficult to bend and easy to operate, with the engagement tool 50.

(Example of change)
In addition, the said embodiment can also be changed and actualized as follows.
-Although the coating | coated part 5 was formed with the polyurethane foam, it should be formed with the polyurethane of an unfoamed state.
The suspension piece 9 and the locking members 4, 31, and 50 are made of PE, but are made of polypropylene or other known synthetic resin.
-Although the backing portion 21 is formed outside the locking tools 4, 31, 50, this portion should be sealed with a part of the molding die 10 to form a gap during foam molding.
-Two locking tools 4, 31, 50 are connected and integrated by connecting portion 44, but three or more locking tools 4, 31, 50 are connected or used. Use fasteners 4, 31, 50 alone.
The anchor portion 6 is formed by the standing plate 61 and the swash plate 62. However, the anchor portion 6 is not limited to this configuration, and a plate-like body extending at least in a direction oblique to the substrate 41 is provided on the substrate 41 to form the anchor portion 6. about.
The vehicle seat 1 is used as a seat pad of different hardness, and the hardness of the seat pads 2 on both sides sandwiching the hanging groove 3 is made different.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Seat pad, 3 ... Hanging groove, 4, 31, 50 ... Locking tool, 5 ... Cover part, 6 ... Anchor part, 7 ... Skin material, 9 ... Hanging piece, 10 ... Mold 11, projecting portion 15, small projecting portion 32, 40, 51, locking piece 41, substrate 44, connecting portion 48, 56 gap, 91 ridge portion.

Claims (7)

  In a vehicle seat provided with a latch for latching a hanging piece that suspends a skin material of a seat pad in a hanging groove, the latch includes a substrate embedded in the seat pad, and the substrate A vehicular seat characterized in that a covering portion of a cured body of a synthetic resin material on which the seat pad is formed is formed on an inner surface of the locking piece. .   The vehicle seat according to claim 1, wherein the covering portion is a foam.   The vehicle seat according to claim 1 or 2, wherein the locking member has anchor portions formed at both ends of the substrate.   The vehicular seat according to any one of claims 1 to 3, wherein a plurality of the locking tools are connected by a connecting portion at an interval arranged in the hanging groove. .   The said latching tool is a synthetic resin molded product, The easy-adhesion process is given to the said locking piece in which the said coating | coated part is formed, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The vehicle seat according to Item.   The hanging piece is a belt-like body provided with a protruding portion having an increased plate thickness at one end, and the protruding portion is fitted inside the pair of locking pieces of the locking tool. The vehicle seat according to any one of claims 1 to 5, characterized in that: The method for manufacturing a vehicle seat according to any one of claims 1 to 6, wherein in the molding die for molding the seat pad, the engagement is provided on a small projection portion of a projection portion that forms a hanging groove. upon setting the fastener, said engaging piece and the penetration of synthetic resin material as the gap to allow occurs between the small protrusions, to form the coating portion infested synthetic resin material into the gap A method for manufacturing a vehicle seat, characterized in that

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