JP2007282919A - Cover for headrest, and headrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover for a headrest, which is capable of preventing the erroneous assembling and omission of the assembling of a headrest core to stays. <P>SOLUTION: This cover 14 is formed with an introduction passage 21 communicating an inlet 16 with an insertion hole 17 formed at its bottom part 14d. The headrest core 19 is assembled with stays 18 to constitute a headrest base material 13. In this state, the headrest core 19 of the headrest base material 13 is stored in the interior of the cover 14. In the state where leg parts 18a of the stays 18 are inserted into the inlet 16, the slit-shaped introduction passage 21 and an introduction passage 22b formed in passage closing members 22 for closing the introduction passage 21 are widened from the inlet 16 to move the leg parts 18a into the insertion hole 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a headrest skin and a headrest used for a headrest attached to a vehicle seat, for example.

  Conventionally, this type of headrest includes a headrest skin (hereinafter simply referred to as the skin) filled with foamed synthetic resin, and a headrest stay (hereinafter simply referred to as a stay) that is made of a metal bar and inserted into the skin. It has. As shown in FIG. 10, the stay 18 has a one-stroke shape, and is composed of two leg portions 18a and a connecting portion 18b that integrally connects the leg portions 18a. Therefore, in order to insert the stay 18 into the skin 14, one leg 18 a is inserted into one of the pair of insertion holes 17 formed in the skin 14, and the leg 18 a protrudes from the other insertion hole 17. Let In this way, as shown in FIG. 11, both the leg portions 18 a of the stay 18 protrude outward from the pair of insertion holes 17, and the connecting portion 18 b is disposed in the skin 14. Thereafter, a foamed synthetic resin is injected into the outer skin 14 through the injection port 16, and the foamed synthetic resin raw material is expanded and foamed to form a headrest as shown in FIG. In this case, the inlet 16 is closed because the pair of bent portions 16a on the inside are brought into close contact with each other by the foaming pressure.

On the other hand, since the foamed synthetic resin may leak from the insertion hole 17, the insertion hole 17 is large enough to tightly tighten the outer peripheral surface of the leg portion 18a.
By the way, as shown in FIG. 12, the stay 18 provided with the headrest core 19 which connects between the base end parts of the leg part 18a is known. In such a configuration, it is impossible to attach the stay 18 to which the headrest core 19 has been previously attached to the skin 14 by the procedure described above. Therefore, as shown in FIG. 11, first, only the stay 18 is inserted into the skin 14 as described above, and then the headrest core 19 is inserted from the slit-like inlet 16, and the headrest is placed on the stay 18 in the skin 14. The core 19 was attached.

Patent Document 1 discloses a method in which a headrest core (core material) and a stay are accommodated in the skin, and then the stay is assembled to the core in the skin.
JP 2005-178196 A

  However, in the conventional headrest, since the assembly work of the headrest core 19 with respect to the stay 18 has to be carried out in the outer skin 14, it becomes a so-called mekura work, which takes time and labor, and causes erroneous assembly. There was a problem that there was a possibility.

  An object of the present invention is to provide a skin for a headrest and a headrest that can solve the above-mentioned conventional problems, can be easily manufactured, and prevent misassembly and the like.

  In order to solve the above-mentioned problems, the invention described in claim 1 includes a pair of insertion holes through which the legs of the headrest stay can project outward, and a slit-like shape used when injecting foamed synthetic resin. In the headrest skin formed with the injection port at the bottom, the bottom is formed with a slit-shaped introduction passage located between the insertion hole and the injection port, and for closing both the introduction passages. The gist is that a passage closing means is provided.

  According to a second aspect of the present invention, in the first aspect, the passage closing means is an elastic material in which the introduction passage and the insertion hole are formed so as to correspond to the introduction passage and the insertion hole on the back surface of the bottom portion of the skin. The gist is that it is formed by a passage closing member.

The gist of the invention described in claim 3 is that, in claim 2, the passage closing member is attached to the back surface of the skin with an adhesive or an adhesive.
The gist of a fourth aspect of the present invention is that, in the second aspect, a locking tool for holding the introduction passage in a closed state is attached to a distal end portion of the passage closing member.

  According to a fifth aspect of the present invention, the gist of the third aspect is that, in the third aspect, a stopper for holding the introduction passage in a closed state is attached to a skin portion attached to the distal end surface of the passage closing member. To do.

  A sixth aspect of the present invention is the shape memory resin or shape according to the first aspect, wherein the passage closing means is formed with an introduction passage and an insertion hole so as to correspond to the introduction passage and the insertion hole on the back surface of the bottom portion. The gist is that it is formed by a passage closing member made of a memory alloy.

  According to a seventh aspect of the present invention, a headrest stay having a headrest core is inserted into the headrest skin according to any one of the first to sixth aspects, and the leg portion of the headrest stay is inserted into the insertion portion. The gist of the invention is that it protrudes outward from the hole and is filled with foamed synthetic resin in the headrest skin.

  According to the present invention, since the introduction passage that connects the injection port formed at the bottom of the epidermis and the insertion hole is formed, the headrest core of the base material for the headrest is installed inside the epidermis with the headrest core assembled to the stay. It is possible to prevent the headrest core from being erroneously assembled or forgotten to be assembled with the stay.

Hereinafter, an embodiment of a headrest embodying the present invention will be described with reference to FIGS.
As shown in FIG. 5, the headrest 11 of this embodiment includes a pad portion 12 and a headrest base material 13 in which a base end portion (upper end portion) is embedded in the pad portion 12. The pad portion 12 has a base end portion of the base material for headrest 13 inserted into a bag-like skin 14 and is set in a molding die 25 shown in FIG. A foamed synthetic resin 15 is molded integrally with the skin 14 by injecting a foaming raw material and expanding the foam.

  As shown in FIG. 1, the skin 14 is formed so as to form a bag shape as a whole by sewing a pair of side skin materials 14b and 14c on both sides of a circumferential skin material 14a cut into a predetermined shape. . A pair of circumferential edges 14e of the peripheral surface skin material 14a that are in contact with each other at the center of the bottom 14d of the skin 14 are bent inside the skin 14, and the left and right sides of both edges 14e And connected to each other by a seam 14f. The portion of the end edge 14e without the seam 14f is a slit-like inlet 16 for inserting the headrest base material 13 or for injecting a foaming raw material. A pair of insertion holes 17 are formed on both sides of the bottom portion 14 d of the skin 14 so as to pass through both leg portions 18 a of the post 18 stay 18 in the headrest base 13 so as to be positioned in the vicinity of the inlet 16.

  As shown in FIG. 3, the base material 13 for headrest includes a substantially inverted U-shaped stay 18 including both leg portions 18a and a connecting portion 18b positioned between the upper ends of the both leg portions 18a. As shown in FIG. 5, it is accommodated in the skin 14 except for the lower end. A headrest core 19 made of a hard material such as polypropylene is fixed to the upper ends of both legs 18a of the stay 18 and the connecting portion 18b so as to protrude forward, and is embedded in the foamed synthetic resin 15 as shown in FIG. ing. A plurality of engaging recesses 19a for engaging the connecting portion 18b are formed at the upper end portion (lower end portion in FIG. 6) of the headrest core 19, and the lower end portion (upper end portion in FIG. 6) of the headrest core 19 is Clamping pieces 19b that clamp the intermediate portion of the pair of leg portions 18a are formed at two locations.

Next, the structure of the principal part of this embodiment is demonstrated.
As shown in FIG. 2A, one end edge 14 e of the pair of end edges 14 e forming the bottom 14 d of the peripheral skin material 14 a and the inlet 16 of the outer skin 14 has a pair with the inlet 16. A slit-like introduction passage 21 that is positioned between the insertion hole 17 and guides the leg portion 18 a inserted through the injection port 16 to the insertion hole 17 is formed. On the back surface of the bottom portion 14d and the edge 14e, a passage closing means made of a synthetic foam resin and a block-like passage closing member 22 as an elastic material are attached to the adhesive 23 so as to correspond to the insertion hole 17 and the introduction passage 21. It is attached through. The passage closing member 22 is formed with an insertion hole 22 a that communicates with the insertion hole 17 and has the same inner diameter as the insertion hole 17, and a slit-shaped introduction passage 22 b that communicates with the introduction passage 21. Is formed. For this reason, a pair of closing pieces 22c are formed in the passage closing member 22 with the introduction passage 22b as a boundary.

Next, the manufacturing method of the headrest 11 comprised as mentioned above is demonstrated.
First, as shown in FIG. 3, the headrest core 19 is connected to the stay 18 of the headrest base material 13, and the headrest core 19 of the headrest base material 13 is accommodated inside the skin 14 from the inlet 16 of the skin 14. Then, as shown in FIG. 4, the intermediate portion of the pair of leg portions 18a is projected to the outside from the injection port 16, and the both leg portions 18a are in a state corresponding to the leading ends (skin edge 14e) of the introduction passages 21 and 22b. To do.

  Next, the pair of blocking pieces 22c of both the passage blocking members 22 shown in FIG. 4 are separated from each other against the elastic force of the passage closing member 22 as shown in FIG. From the first through passages 21 and 22b widened to the insertion hole 17. In this way, the passage closing member 22 is restored to the state of closing the introduction passages 21 and 22b by its own elastic restoring force. In this way, as shown in FIG. 5, both leg portions 18 a are protruded to the outside from the insertion hole 17 in a state where the headrest core 19 of the base material 13 for headrest is accommodated in the skin 14.

  Next, a tucker 24 as a locking tool is inserted from the outer surface of the skin 14 into the distal ends of the pair of passage blocking members 22 to hold the pair of closing pieces 22c in a closed state. Further, as shown in FIG. 6, the skin 14 is accommodated in a mold 25, and the foaming raw material is injected into the skin 14 from the inlet 16 to mold the foamed synthetic resin 15. In this case, even if the foaming pressure due to the raw material acts on the passage closing member 22, the foaming synthetic resin leaks from the introduction passage 22 b and the introduction passage 21 because the introduction passage 22 b is held closed by the tucker 24. There is no. In addition to the tucker, staples, pins, or the like, or a tape attached to the skin may be used as the locking tool.

As described above, the headrest 11 can be manufactured.
According to the headrest of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, since the introduction passage 21 is formed between the injection port 16 and the insertion hole 17 in the bottom portion 14d of the skin 14, the inside of the skin 14 with the headrest core 19 assembled to the stay 18. The headrest core 19 of the headrest base material 13 can be mounted on the headrest. For this reason, the assembly work by groping becomes unnecessary, the assembly can be easily performed, and the misassembly of the headrest core 19 with respect to the stay 18 can be prevented.

  (2) Since the passage closing member 22 having the insertion hole 22a and the introduction passage 22b is attached to the back surface of the bottom portion 14d and the end edge 14e by the adhesive 23, the introduction passage 21 is elastically restored to the passage closing member 22. Furthermore, since the passage closing member 22 is an elastic material having a predetermined thickness, it also functions as a seal member. For this reason, when the foaming raw material is injected into the skin 14 to mold the foamed synthetic resin 15, it is possible to prevent the foaming raw material from leaking from the introduction passage 21 to the outside.

  (3) Moreover, since the tucker 24 as a locking tool is inserted into the distal end portion of the closing piece 22c of the passage closing member 22, it is possible to more reliably prevent the pair of closing pieces 22c from being separated, It is possible to more reliably prevent the foaming material from leaking from the introduction passage 21 to the outside.

(4) Furthermore, since the passage closing member 22 is formed in the shape of a square block from foamed synthetic resin, the passage closing member 22 can be easily manufactured.
In addition, you may change the said embodiment as follows.

  As shown in FIG. 7, a pipe 26 may be attached to the front end surface of the closing piece 22 c of the passage closing member 22 with an adhesive or the like, and a hairpin-shaped locking tool 27 may be inserted into both pipes 26.

  As shown in FIG. 8, the passage closing member 22 may be formed of a shape memory resin or a shape memory alloy. In this case, at normal temperature, the closing piece 22c of the passage closing member 22 is opened, and the leg portion 18a is introduced into the insertion hole 22a. Further, when forming the foamed synthetic resin 15 in the skin 14 by the mold 25, the passage closing member 22 is heated by the heat of foaming raw material, and the closing pieces 22c are held in contact with each other.

  As shown in FIG. 9, as a passage closing means for closing the introduction passage 21 of the bottom portion 14d, one female engagement of the hook-and-loop fastener is located near the introduction passage 21 with respect to the back surface of the bottom portion 14d. A sheet 31 provided with a large number of elements 31a is sewn in two places, and a single sheet 32 provided with a large number of other male engagement elements 32a is attached to the sheet 31, thereby closing the introduction passage 21. May be.

-Although not shown in figure, the cylindrical part which contacts the cloth piece with the edge 14e of the outer skin 14, and is sewn, and latches the said locking tool 27 may be formed.
An adhesive may be used in place of the pressure-sensitive adhesive 23.

The perspective view which shows the epidermis of a headrest. (A) And (b) is an expansion perspective view of the passage block member vicinity. The perspective view which shows the isolation | separation state of the base material for headrests, and an outer_skin | epidermis. The perspective view which shows the base material for headrests, and the half assembly state of an outer skin. The perspective view which shows the assembly | attachment state of the base material for headrests, and a skin. Sectional drawing which shows the formation process of a headrest. The perspective view of the passage block member vicinity which shows another embodiment of this invention. The perspective view of the passage block member vicinity which shows another embodiment of this invention. The block diagram of the channel | path obstruction | occlusion means which shows another embodiment of this invention. The isolation | separation perspective view which shows the conventional skin and a stay. The perspective view which shows the assembling method of the skin of a conventional headrest, a stay, and a core material. The perspective view of the conventional headrest.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 14 ... Epidermis, 14d ... Bottom part, 15 ... Foam synthetic resin, 16 ... Injection port, 17, 22a ... Insertion hole, 18a ... Leg part, 19 ... Headrest core, 21, 22b ... Introduction passage, 22 ... Passage obstruction | occlusion member, 23 ... Adhesive, 24 ... Tucker as a locking tool, 27 ... Locking tool.

Claims (7)

In the headrest skin where a pair of insertion holes through which the legs of the headrest stay can protrude outward and a slit-like inlet used when injecting the foamed synthetic resin are formed at the bottom,
The headrest is characterized in that a slit-like introduction passage located between the insertion hole and the injection port is formed in the bottom portion, and passage closing means for closing both the introduction passages is provided. For the skin. 2. The passage closing means according to claim 1, wherein the passage closing means is formed by a passage closing member made of an elastic material in which the introduction passage and the insertion hole are formed so as to correspond to the introduction passage and the insertion hole on the back surface of the bottom portion of the skin. An epidermis for headrest. 3. The headrest skin according to claim 2, wherein the passage blocking member is attached to the back surface of the skin with an adhesive or an adhesive. 3. The headrest skin according to claim 2, wherein a stopper for holding the introduction passage in a closed state is attached to a distal end portion of the passage closing member. 4. The headrest epidermis according to claim 3, wherein a locking member for holding the introduction passage in a closed state is attached to a skin portion attached to the distal end surface of the passage closing member. 2. The passage closing means according to claim 1, wherein the passage closing means is formed by a passage closing member made of a shape memory resin or a shape memory alloy in which the introduction passage and the insertion hole are formed on the back surface of the bottom portion so as to correspond to the introduction passage and the insertion hole. An epidermis for headrest characterized by being made. A headrest stay having a headrest core is inserted into the headrest skin according to any one of claims 1 to 6, and a leg portion of the headrest stay projects outward from the insertion hole. In addition, the headrest is characterized in that foamed synthetic resin is filled in the headrest skin.

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