JP2013095259A - Headrest and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a headrest with favorable appearance, and a method of manufacturing the same.SOLUTION: The headrest 10 includes a headrest core 12, a bag-like surface skin 14 for covering the headrest core 12, and a foam-molded elastic body 16 between the headrest 12 and the surface skin 14. The headrest 10 includes: an insertion part 20 formed on the headrest core 12 and defining an insertion port 20a in which a stay 18 is inserted; a cover member 34 having a cylindrical part 36 fitted into the insertion port 20a; and engaging parts 44, 46 formed at an outer side of the cylindrical part 36 and drawing in an end edge of the surface skin 14 folded inside the insertion part 20 in mounting the cover member 34.

Description

  The present invention relates to a headrest and a manufacturing method thereof.

  A headrest that protects the head of an occupant seated in the seat is mounted on the upper part of the seat bag of the seat installed in the passenger compartment of the vehicle (see, for example, Patent Document 1). The headrest is attached with a stay protruding below the main body portion supported by a support portion provided in the seat bag. Here, the headrest is basically composed of a box-shaped headrest core with stays connected to the inside, a bag-shaped skin covering the headrest core, and an elastic body foam-molded between the headrest core and the skin. Has been. The headrest core is formed so that an insertion port through which the stay is inserted penetrates inside and outside, and the stay skin is formed in the epidermis according to the insertion port. Then, the engagement claw of the cover member is fitted into the insertion opening, thereby sealing the gap between the headrest core and the outer skin with the stay opening peripheral edge between the flange of the cover member and the periphery of the insertion opening. The elastic body is foam-molded between the headrest core and the skin.

JP 2008-253335 A

  The headrest described above has the appearance of the headrest, such as the elastic body is foam-molded while the peripheral edge of the stay opening in the skin is loosened, and the skin is wrinkled, or the elastic body leaks without sufficient sealing. May get worse. Further, when foaming the elastic body, there is a possibility that the stay opening peripheral edge portion of the skin is displaced from the flange of the cover member and the headrest core or may be detached.

  That is, the present invention has been proposed in view of the above-described problems inherent in the prior art, and it is an object of the present invention to provide a headrest with good appearance and a method for manufacturing the headrest.

In order to overcome the above-mentioned problems and achieve the intended object, the headrest of the invention according to claim 1 of the present application is
In a headrest having a box-shaped headrest core, a bag-like skin covering the headrest core, and an elastic body foam-molded between the headrest core and the skin,
An insertion portion that is formed in the headrest core and defines an insertion port through which a member facing the outer surface of the epidermis from the inside of the headrest core is inserted;
A cover member that has a cylindrical portion that can be inserted into the insertion port, and that is attached to the insertion unit by inserting the cylindrical portion into the insertion port;
A gist is provided with an engaging portion that is formed on the outer side of the cylindrical portion and that pulls in an end edge of the skin that is folded back inside the insertion portion when the cylindrical portion is inserted into the insertion port. To do.
According to the invention which concerns on Claim 1, when attaching a cover member by an engaging part, a skin can be drawn in and tension can be applied and generation | occurrence | production of the wrinkle of a skin can be prevented. In addition, it is possible to prevent the skin from being displaced or pulled out by the engaging portion. Therefore, the appearance of the headrest can be improved.

In the invention which concerns on Claim 2, the said cover member is provided so that it may extend outward on the outer peripheral surface of the said cylindrical part, and pinches | interposes an outer skin with the peripheral part of the insertion port in the said insertion part. The gist is that a flange portion is provided.
According to the invention which concerns on Claim 2, the shift | offset | difference of a skin, omission | release, etc. can be prevented more reliably by pinching | interposing a skin with a clamping part.

The gist of the invention according to claim 3 is that the edge of the engagement portion that faces the skin is formed to be uneven.
According to the invention which concerns on Claim 3, the shift | offset | difference of a skin, omission, etc. can be prevented more reliably by the unevenness | corrugation of an engaging part.

In order to overcome the above-mentioned problems and achieve the intended purpose, a method for manufacturing a headrest according to claim 4 of the present application is as follows.
Inserting a box-shaped headrest core formed with an insertion portion that defines an insertion port through which a member facing from the inside to the outside can be inserted, into the bag-shaped skin,
The cover member is attached to the insertion portion while pulling the edge of the epidermis folded inside the insertion portion with an engagement portion formed in the cover member inserted into the insertion port,
The gist is that the outer skin is sealed between the insertion portion and the cover member, and an elastic body is foam-molded between the headrest core and the skin.
According to the fourth aspect of the present invention, when attaching the cover member to the headrest core, the edge of the epidermis is pulled in and tension is applied. Can do. That is, when the elastic body is foam-molded, leakage of the resin raw material can be prevented. Further, a structure for sealing the outer skin against the headrest core by the molding die can be omitted, and the molding die can be simplified. And the appearance of the obtained headrest can be improved.

  According to the headrest and the manufacturing method thereof according to the present invention, appearance can be improved.

1 is a schematic perspective view showing a headrest partly cut away according to a preferred embodiment of the present invention. It is the sectional view on the AA line of FIG. It is principal part sectional drawing fractured | ruptured by the BB line of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2, where (a) shows a state where the cover member is being attached, and (b) shows a state before foam molding of the elastic body to which the cover member is attached.

  Next, the headrest and the manufacturing method thereof according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. Note that the front, rear, left, and right directions are designated based on the mounting posture of the headrest to the seat, and FIG. 1 shows a state in which the headrest is viewed from the front side.

  As shown in FIGS. 1 and 2, the headrest 10 includes a headrest core 12 formed in a box shape, a skin 14 formed in a bag shape that can cover the outside of the headrest core 12, and the headrest core 12 and the skin 14. And an elastic body 16 which is foam-molded between them and expresses cushioning properties. Further, the headrest 10 has two stays (members) 18 and 18 extending downward from the bottom surface, and the stays 18 are respectively inserted into the support portions provided on the seat bag in the seat so that the headrest 10 is attached to the seat. It is attached. The stay 18 is supported so that the upper part facing the inside of the headrest core 12 can be rotated around the left and right axes by a support mechanism (not shown), and the headrest 10 can be adjusted in angle with respect to the seat when attached to the seat. It has become.

  The headrest core 12 is configured by assembling two front and rear synthetic resin halves, and an accommodation space 12a that can accommodate the upper portion of the support mechanism and the stay 18 is defined (see FIG. 2). A pair of insertion portions 20, 20 that respectively define insertion openings 20 a communicating with the accommodation space 12 a corresponding to the pair of stays 18, 18 arranged side by side in the left-right direction at the bottom of the headrest core 12. Is formed. A stay 18 having an upper end supported inside the headrest core 12 is inserted into the insertion opening 20a, and a lower end of the stay 18 faces outward through the insertion opening 20a. Here, the insertion opening 20 a is greatly opened in the front-rear direction corresponding to the stay 18 that moves relative to the headrest core 12 in the front-rear direction. The insertion portion 20 is formed with a receiving piece 22 extending in the horizontal direction (surface direction intersecting with the insertion direction of the cover member 34 described later into the insertion port 20a) on the outer (lower) peripheral edge portion of the insertion port 20a. Has been. A mounting piece 24 extending in the horizontal direction toward the rear is formed on the inner surface of the front portion of the insertion portion 20, and a mounting hole 26 penetrating vertically is formed in the mounting piece 24.

  The skin 14 is made of leather or fabric made of natural or synthetic resin, and is formed into a bag shape by stitching a single or a plurality of skin pieces cut into a predetermined shape. On the bottom surface of the skin 14, stay openings 28 and 28 that are slightly smaller than the insertion ports 20 a are formed at positions corresponding to the left and right insertion ports 20 a and 20 a, and the insertion port of the headrest core 12 into the skin 14 is formed. A cut 30 is formed between the left and right stay openings 28, 28 (see FIG. 1). An injection opening 32 serving as an injection port for an elastic material is formed at the center of the cut 30 in the skin 14 when the elastic body 16 is foam-molded. The cut 30 and the injection opening 32 are sealed in the obtained headrest 10.

  A substantially cylindrical cover member 34 is fitted to the headrest 10 from below with respect to the insertion portion 20. The cover member 34 sandwiches the skin 14 and surrounds the stay 18 (FIGS. 1 to 3). reference). The cover member 34 has a cylindrical cylindrical portion 36 that communicates with the upper and lower sides, and a flange that extends outwardly (in a direction parallel to the receiving piece 22) from the lower edge of the outer peripheral surface of the cylindrical portion 36. A portion 38 is provided. The cover member 34 is configured to sandwich the skin 14 between the flange portion 38 and the receiving piece 22 when the cylindrical portion 36 is inserted into the insertion port 20a and attached to the insertion portion 20 (FIG. 2). Or see FIG. The front portion of the cylindrical portion 36 is curved so as not to interfere with the mounting piece 24 toward the flange portion 38 continuous to the front side (see FIG. 2). The cover member 34 is positioned at the rear portion of the outer peripheral surface of the cylindrical portion 36, and has a plate-like first mounting portion 40 formed to extend rearward with a predetermined interval above the flange portion 38, and a flange. And a second mounting portion 42 formed so as to extend upward at a portion facing the inside of the insertion opening 20a in the front portion of the portion 38 (see FIG. 2). The second attachment portion 42 has a claw portion 42b formed to extend outward from the insertion shaft portion 42a at the upper end portion of the insertion shaft portion 42a provided upright on the upper surface of the flange portion 38. The taper is tapered from the portion 42b toward the upper end. The cover member 34 is formed with an adjustment rib 48 extending rearward between the first mounting portion 40 and the flange portion 38 of the cylindrical portion 36 (see FIG. 4). The attachment degree of the cover member 34 with respect to the insertion part 20 is adjusted by changing the protruding dimension.

  The cover member 34 has engaging portions 44 and 46 formed so as to extend along the vertical direction (the insertion direction of the cylindrical portion 36 into the insertion opening 20a) outside the cylindrical portion 36. (See FIG. 2 or FIG. 3). The engaging portions 44 and 46 are configured so that the end edge of the skin 14 folded back inside the insertion port 20a opened downward in the insertion portion 20 can be hooked and drawn when the cylindrical portion 36 is inserted into the insertion port 20a. Has been. Here, the cover member 34 according to the embodiment has a first engagement portion 44 formed so as to extend vertically on the front surface of the insertion shaft portion 42 a of the second attachment portion 42, and upper and lower sides on the left and right side surfaces of the tubular portion 36. And a second engaging portion 46 formed so as to extend. Each of the engaging portions 44 and 46 has a rib shape rising from a surface (the insertion shaft portion 42 a or the cylindrical portion 36) to which the engaging portions 44 and 46 are connected, and the engaging end edge 44 a that faces the inner surface of the insertion portion 20. 46a are uneven. Here, the engaging end edges 44a and 46a of the embodiment have a saw blade shape in which a plurality of convex portions are formed in a side view of the engaging portions 44 and 46 so as to easily bite into the outer skin 14, and the insertion portion 20 The skin 14 is easily caught between the two. The convex portions of the engagement end edges 44a and 46a are substantially right-angled triangles in a side view of the engagement portions 44 and 46, and one acute angle faces the skin 14 and the hypotenuse is downward (outward of the headrest 10). ).

  Next, a method for manufacturing the headrest 10 according to the embodiment will be described. The headrest core 12 provided with the stays 18 and 18 is inserted from the cut 30 of the skin 14 formed in a bag shape, and the stays 18 and 18 are protruded outward through the stay openings 28 and 28. The stay 18 is passed through the inside of the tubular portion 36, and the cover member 34 is inserted between the first mounting portion 40 provided at the rear portion of the cover member 34 and the flange portion 38 so that the cover member 34 is inclined downward from the rear to the front. The receiving piece 22 of the portion 20 and the edge of the skin 14 are sandwiched (see FIG. 4A). By rotating the cover member 34 toward the headrest core 12 side with the first attachment portion 40 side as a fulcrum, the edge of the skin 14 folded back inside the insertion portion 20 is the engagement edge of the first engagement portion 44. 44 a and the engagement end edge 46 a of the second engagement portion 46 are pushed and pulled upward along the inside of the insertion portion 20. By fitting the second attachment portion 42 into the attachment hole 26, an intermediate product in which the cover member 34 is attached to the headrest core 12 is obtained (see FIG. 4B). At this time, the end edge of the skin 14 is sandwiched between the engagement end edges 44a, 46a of the engagement portions 44, 46 and the inner surface of the insertion portion 20, and the flange portion 38 of the cover member 34 and the insertion portion 20 The skin 14 is sandwiched between the receiving piece 22 and the headrest core 12 and the skin 14 are tightly sealed. An intermediate product is set in a mold (not shown) having a cavity formed in accordance with the outer shape of the headrest 10 to be obtained, an elastic material is injected from the injection opening 32, and foam molding is performed. An elastic body 16 is filled between the skin 14.

  As described above, when the cover member 34 is attached to the headrest core 12, the first engaging portion 44 and the second engaging portion 46 pull the edge of the skin 14 and apply tension in the direction in which the skin 14 is stretched. it can. Here, since the engaging portions 44 and 46 are provided at the front portion and the three left and right portions of the cover member 34, in the operation of hooking the first mounting portion 40 and inserting the second mounting portion 42 into the mounting hole 26. The tension can be applied to the epidermis 14 in a well-balanced manner. As a result, when foaming the elastic body 16, it is difficult for the skin 14 to sag, and the headrest core 12 and the skin 14 can be brought into close contact with each other without gaps, so that the headrest core 12 and the skin 14 can be appropriately sealed. Furthermore, since the skin 14 is folded back and held inside the insertion portion 20 by the engaging portions 44 and 46, the skin 14 is displaced even if foaming pressure is applied to the skin 14 during foaming of the elastic body 16. It is also possible to prevent such a situation from happening. In addition, since the engagement end edges 44 and 46 of the engagement portions 44 and 46 have an uneven shape, the skin 14 can be held more reliably. Furthermore, in the embodiment, since the skin 14 is sandwiched between the flange portion 38 of the cover member 34 and the receiving piece 22 of the insertion portion 20, the skin 14 can be more reliably held. That is, the obtained headrest 10 can avoid wrinkles in the skin 14 due to sagging of the skin 14 when the elastic body 16 is foam-molded, and is properly sealed, so that the elastic material raw material leaks out. It is possible to prevent soiling and the like. Therefore, the appearance of the headrest 10 can be improved.

  According to the headrest 10, since the skin 14 is folded back and held inside the insertion portion 20 by the engaging portions 44, 46, the skin 14 may be displaced even if a tensile force is applied to the skin 14 during use. , And can be prevented from coming off. In addition, since the engagement end edges 44 and 46 of the engagement portions 44 and 46 have an uneven shape, the skin 14 can be held more reliably. In the embodiment, since the skin 14 is also sandwiched between the flange portion 38 of the cover member 34 and the receiving piece 22 of the insertion portion 20, the skin 14 can be held more reliably. Here, the direction in which the skin 14 is sandwiched by the engaging portions 44 and 46 and the inner surface of the insertion portion 20 is different from the direction in which the skin 14 is sandwiched by the flange portion 38 and the receiving piece 22. It is difficult for the skin 14 to shift from the member 34. Since the first engagement portion 44 is configured in a rib shape that is continuously provided so as to connect the second attachment portion 42 erected from the flange portion 38 and the flange surface of the flange portion 38, the second attachment portion It functions as a reinforcing part that connects 42 and the flange part 38. Similarly, since the second engaging portion 46 is configured in a rib shape that is continuously provided so as to connect the outer peripheral surface of the cylindrical portion 36 and the flange surface of the flange portion 38, the outer peripheral surface of the cylindrical portion 36. And function as a reinforcing part that connects the flange part 38. Thereby, the force which pinches | interposes the skin 14 of the flange part 38 can be improved, and the skin 14 in the state with the tension applied can be clamped more stably.

(Change example)
The present invention is not limited to the above-described embodiment, and can be modified as follows.
(1) Although the engaging portion is provided in the cover member that surrounds the stay opening through which the stay is inserted, for example, in a configuration in which the stay can be regulated at a predetermined angle by the support mechanism, the button that releases the restricted state by the support mechanism is outward. You may provide an engaging part in the cover member surrounding the button opening to face.
(2) The number of engaging portions is not limited to the configuration of the embodiment. For example, the number of engaging portions may be one or two, or may be four or more.
(3) The position of the engaging portion is not limited to the configuration of the embodiment, and may be provided at the rear portion of the cover member.
(4) The engagement end edge may have a sawtooth shape opposite to the embodiment so that the end edge of the skin can be easily pulled when the cover member is attached to the insertion port. The unevenness of the engagement edge can be adopted as long as it has a resistance to the skin, such as a fine groove shape.
(5) The shape of the convex portion formed on the engaging edge is changed depending on the thickness, hardness and surface frictional resistance of the skin. For example, when the skin is thick or hard, or when the surface has a high frictional resistance, it is preferable to provide the hypotenuse downward because the resistance when fitting the cover member to the insertion portion is large. Conversely, when the skin is thin, when the hardness is low, or when the frictional resistance is low, the pressure on the skin is weakened, so it is preferable to provide the hypotenuse upward (the direction in which the cover member is attached), and the thickness and hardness of the skin And it adjusts suitably according to the surface state. Further, the angle of the angle facing the skin in the convex portion may be any of acute angle, right angle, and obtuse angle, and as described above, it is preferable to adjust and change the angle depending on the thickness, hardness, and surface frictional resistance of the skin. . If the skin is thick or hard, or if the frictional resistance is high, the resistance when fitting the cover member to the insertion part is large, so the angle is set to be large (obtuse angle side). Is small or the frictional resistance is low, the pressure on the epidermis is weakened, so it is preferable to provide a small angle (acute angle side), which is adjusted appropriately according to the thickness, hardness and surface condition of the epidermis. The
(6) In the embodiment, an example is described in which a member such as a stay is inserted into the skin in a state in which the member is previously disposed on the headrest core. May be.

12 headrest cores, 14 skins, 16 elastic bodies, 18 stays (members),
20 insertion part, 20a insertion port, 34 cover member, 36 cylindrical part, 38 flange part,
44 1st engaging part (engaging part), 46 2nd engaging part (engaging part)

Claims (4)

In a headrest having a box-shaped headrest core, a bag-like skin covering the headrest core, and an elastic body foam-molded between the headrest core and the skin,
An insertion portion that is formed in the headrest core and defines an insertion port through which a member facing the outer surface of the epidermis from the inside of the headrest core is inserted;
A cover member that has a cylindrical portion that can be inserted into the insertion port, and that is attached to the insertion unit by inserting the cylindrical portion into the insertion port;
An engaging portion that is formed on the outer side of the cylindrical portion and that pulls in an end edge of the epidermis that is folded back on the inner side of the insertion portion when the cylindrical portion is inserted into the insertion port. Headrest.   The said cover member was provided so that it might extend outside on the outer peripheral surface of the said cylindrical part, and was provided with the flange part which clamps an outer_skin | epidermis between the peripheral part of the insertion port in the said insertion part. The listed headrest.   The headrest according to claim 1 or 2, wherein an edge of the engaging portion facing the skin is formed to be uneven. Inserting a box-shaped headrest core formed with an insertion portion that defines an insertion port through which a member facing from the inside to the outside can be inserted, into the bag-shaped skin,
The cover member is attached to the insertion portion while pulling the edge of the epidermis folded inside the insertion portion with an engagement portion formed in the cover member inserted into the insertion port,
A method of manufacturing a headrest, comprising sealing the outer skin between the insertion portion and the cover member and foaming an elastic body between the headrest core and the outer skin.

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