JPH0321940Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to a foam raw material inlet structure for an integrally foamed molded product with a sewn outer skin, and more specifically, a bag formed by sewing and joining a plurality of skin materials. In an integral foam molded product with a sewn outer skin, which is formed by foaming a predetermined foaming raw material inside a bag-shaped skin, a method for injecting a predetermined foaming raw material into the inside of the bag-shaped skin This relates to the structure of the injection port.

(Prior art and its problems) An integrally foamed molded product composed of skin materials to which the outer skin is sewn together, such as a headrest for an automobile seat whose outer surface is covered with a cloth material, generally has multiple skin materials. It is formed by foaming a predetermined foaming raw material inside a bag-shaped skin formed by sewing and joining, but injecting the foaming raw material into the inside of the bag-like skin After the formation of the epidermis, this is usually done through a predetermined nozzle. For this purpose, an injection port for inserting a foaming material injection nozzle is generally formed in the bag-like skin so as to communicate between the inside and outside of the skin.

A nozzle is inserted into an injection port formed in the bag-like skin, and a predetermined foaming material is injected into the inside of the bag-like skin through the nozzle, and the foaming material injected through this nozzle is subjected to a foaming operation. In this way, an integrally foamed molded product with a predetermined sewn outer skin, such as the headrest for an automobile seat, is manufactured.

By the way, in the case of such integrally foamed molded products, a part of the end of the skin material to be sewn and joined is usually left unjoined, and the unjointed part is used as it is as an injection port for the foaming raw material. However, if the unjoined end portion of the skin material is simply used as the injection port for the foaming material, the foam will leak from the unjoined end during the foaming operation. There are problems such as leakage to the outside, necessitating a complicated repair process, and problems such as significantly damaging the appearance of the product.

Therefore, in automobile headrests, etc., a part of the bag-like skin is conventionally made of a resin plate, and the injection port is formed in the resin plate.
After the foaming raw material is injected, the injection port is closed with a dedicated closing pin to foam the foaming raw material. In this way, it is possible to effectively prevent the foam from leaking to the outside from the injection port for the foaming raw material.Therefore, there is no need for a complicated repair process after the foaming operation of the foaming raw material, and the appearance is improved. It is also possible to obtain a relatively excellent integrally foamed molded product.

However, in this integral foam molded product where a part of the bag-like skin is made of a resin plate,
There were problems in that the presence of the resin plate impaired the flexibility unique to the foamed molded product, and it also caused an unnatural appearance.

(Solution Means) Here, the present invention is formed by foaming a predetermined foaming raw material inside a bag-shaped skin formed by sewing and joining a plurality of skin materials as described above. In the integrally foamed molded product with a sewn outer skin, the predetermined foaming raw material is injected into the inside of the skin through a predetermined nozzle that is formed and inserted into the bag-shaped skin so that the inside and outside of the skin communicate with each other. The purpose of this invention is to provide an inlet structure for foamed raw materials that allows the above-mentioned problems to be solved, and the gist of this is that the Two film materials are placed between predetermined corresponding terminals so as to protrude by a predetermined distance from the overlapped portion of the terminals toward the outer surface of the bag-shaped skin, and By sewing and joining the ends of the skin material on which the film material is disposed, leaving a part of it unjoined, the overlapping part of the film material in the unjoined part is inserted into the nozzle. This is due to the fact that it is used as an injection port.

(Operation/Effect) According to such a foamed raw material injection port structure, by inserting the nozzle into the overlapped portion of the film materials forming the injection port, the overlapped portion of the film materials is forcibly expanded and opened. can be made,
A predetermined foaming material can be injected into the inside of the bag-like skin through the nozzle. On the other hand, the film material constituting the injection port is disposed in such a manner that it protrudes by a predetermined distance from the overlapped end of the skin material toward the outer surface of the bag-shaped skin, so that during the foaming operation of the foaming raw material, By sandwiching the protruding portion of the film material between molds, the injection port can be reliably closed.

In other words, if the foaming material injection port structure according to the present invention is adopted, it is of course possible to inject the specified foaming material into the inside of the bag-like skin through the nozzle. By simply sandwiching the overlapping parts of the film material between the molds, it is possible to reliably prevent the foam from leaking out from the injection port. A complicated repair process for treating the foam becomes unnecessary, and the appearance of the integrally foamed molded product can be effectively prevented from being damaged by the foam leaking from the injection port. In addition, when the foaming raw material injection port structure of the present invention is adopted, it is necessary to cut off the protruding portion of the film material that protrudes from the outer surface of the bag-like skin after the foaming operation of the foaming raw material.
The operation of removing such film material is extremely simple compared to the repair work of leaked foam.

In addition, by adopting the foam material injection port structure according to the present invention, the above-mentioned effects can be obtained without configuring a part of the bag-shaped skin with a resin plate as in conventional integral foam molded products. The presence of such a resin plate does not impair the unique flexibility of the foam molded product, and furthermore, the entire outer skin (bag-shaped skin) of the integral foam molded product is substantially composed of the skin material. As a result, it is possible to obtain an integrally foamed molded product with an even better appearance and without any discomfort due to the presence of the resin plate.

(Example) Hereinafter, in order to clarify the present invention more specifically, one example thereof will be described in detail based on the drawings. Here, a case will be described in which the present invention is applied to a headrest for an automobile seat, but it goes without saying that the present invention can also be applied to other integrally foamed molded products.

First, FIG. 1 shows a perspective view of a headrest in an upside-down configuration employing a foaming material inlet structure according to the present invention. There, 10 is
The headrest main body is composed of a predetermined foam 12 such as urethane foam, and a bag-like skin 14 as an outer skin covering the outer surface of the headrest. and,
Inside the foam 12 of the headrest main body 10,
A predetermined core (not shown) is embedded, and a pair of stays 1 extend downward (of the headrest main body 10) through the bag-like skin 14 from the core.
6 and 16 are made to protrude. The pair of stays 16 allows the headrest to be attached to a car seat.

Furthermore, the bag-like skin 14 is made up of a plurality of skin materials 18 such as cloth materials that are joined by sewing, and these skin materials 18 have corresponding ends 19.
(See FIG. 2) are formed by sewing and joining them together. As shown in the figure, the stays 16, 16 are made to protrude from between the joint ends 19 of the skin material 18 sewn and joined on the lower surface of the headrest main body 10.

In this embodiment, in such a headrest, as shown in FIG.
Two flexible film materials 20, 20 made of a predetermined resin material such as a urethane sheet and having a thickness of about 30 μm are placed between the terminals 19 of , the overlapped portions of the film materials 20, 20 are integrally sewn together with the end 19 of the skin material 18, except for a part thereof, and the overlapped portions of the film materials 20, 20 are left in an unjoined state. is a foaming material injection port 22 for injecting a foaming material 26, which will be described later.

Note that the foaming material inlet 22 is connected to the stay 1 as shown in FIG.
It is formed approximately in the center between the protruding parts 6 and 16. Also, as is clear from the figure, stay 1
6 and 16 are made to protrude through the overlapped portions of the film materials 20 and 20, respectively.

Incidentally, such a headrest is manufactured, for example, in the following manner. Hereinafter, while explaining the manufacturing method of the headrest shown in FIG. 1 with reference to FIGS. 2 to 6,
We will explain the structure of

That is, when manufacturing the head rest shown in FIG. 1, first, the plurality of skin materials 18 are stacked one on top of the other with their front and back sides turned over, that is, with the outer surface side facing inside, and in this state, each skin material Eighteen corresponding ends are sewn together. Then, by sewing and joining the skin material 18 with the front and back sides turned over, the insertion opening for inserting the core body (in this case, the terminal joint portion on the lower surface of the headrest main body 10) is left in an unjoined state. A semi-sewn product of the bag-like skin 14 is manufactured.

Next, the semi-sewn product of the bag-like skin 14 sewn in this way is turned inside out through the unjoined part of the terminal 19 left as the core insertion opening, and the bag-like skin 14 that has been turned inside out is turned inside out. The core body and stays 16, 16 are inserted into the semi-sewn product through the core insertion port. After inserting the core, the film materials 20 and 20 are applied to the end 19 of each skin material 18 constituting the peripheral edge of the core insertion opening, as shown in FIG.
are disposed, and after disposing the film materials 20, 20, the ends 19 of the skin materials 18 are overlapped with the film materials 20, 20 in between, and are pressed against each other at the proximal end of the overlapping portion. Sewn and joined. In this sewing and joining step, as shown in FIG. 3, a part of the overlapping portion remains unjoined, and the foaming material injection port 22 is formed.

In addition, each film material 20, 20 is as follows.
As shown in FIGS. 2 and 3, one end side in the width direction is the end 1 of each skin material 18.
The tip of the terminal 19 is folded back so as to sandwich the terminal 9 . As shown in FIG. 2, when the terminal 19 is sewn and joined, its folded portion is also sewn and joined at the same time. By arranging and joining the film materials 20 and 20 to each end 19 of the skin material 18 in this manner, each film at the formation site of the foaming material injection port 22 during the foaming operation of the foaming material 26 described later. The foaming raw material 26 is effectively prevented from leaking to the outside from between the material 20 and the end 19 of the skin material 18.

Further, the other end side in the width direction of each film material 20, 20 is arranged so as to protrude by a predetermined distance from the outer surface of the bag-like skin 14, as shown in FIGS. 2 and 3. .

Then, the pouch-like epidermis 1 formed in this way
As shown in FIG. 4, an injection nozzle 24 is inserted into the foaming material injection port 22 of No. 4, and a predetermined foaming material 26 is injected into the inside of the bag-like skin 14 through this injection nozzle 24. After the foaming raw material 26 is injected, the foaming raw material 26 is placed in a predetermined mold 28 as shown in FIG.
As a result, as shown in FIG. 6, the inner space of the bag-like skin 14 is filled with the foam 12, and after the foaming operation of the foaming raw material 26, the outside of the bag-like skin 14 is expanded. By cutting off the protruding portions of the film materials 20, 20 protruding from the surface, a head rest as shown in FIG. 1 is obtained.

In short, the bag-shaped skin 1 of the film material 20, 20
Only the portion protruding from the outer surface of the skin material 18 is cut and removed, and the remaining portion, which is sandwiched between the ends 19 of the skin material 18 and sewn together with the ends 19, is left as is and placed inside the product (headrest). It will be made to exist.

Note that the injection operation of the foaming raw material 26 is performed here by opening the opening 3 upwardly as shown in FIG.
A bag-like epidermis 1 is placed in the split molds 32A and 32B having 0
4 is set. Further, in the foaming operation of the foaming raw material 26, the upper opening 30 formed by the split molds 32A and 32B is
This is done with A and 32B closed.

In this embodiment, as shown in FIG.
The protruding portions of the film materials 20, 20 protruding from the outer surface of the bag-like skin 14 are split molds 34A, 34B.
The foaming raw material 26 is subjected to the foaming operation while being sandwiched between the foaming raw material inlet 2 and the foaming raw material injection port 2.
2 (indicated by a phantom line in FIG. 5) is ensured to be closed.

Therefore, according to the headrest that employs such a foaming material injection port 22, leakage of the foam 12 to the outside through the foaming material injection port 22 is reliably prevented, and leakage of the foam 12 is prevented. Problems caused by this can be effectively prevented. Moreover, in order to prevent leakage of the foam 12, it is not necessary to construct a part of the bag-like skin 14 with a hard resin plate, so the presence of such a resin plate makes it possible to create a unique foam molded product. Flexibility is not impaired, and furthermore, the entire outer surface of the headrest main body 10 is substantially covered with the skin material 18, so the appearance is much improved compared to those using such resin plates. It will improve.

Above, one embodiment of the present invention has been explained in detail.
This is a literal example, and it goes without saying that the present invention should not be construed as being limited to this specific example.

For example, in the embodiment, the film materials 20, 2
The film materials 20, 20 were arranged over approximately the entire length between the bonding ends 19 of the skin material 18 located on the lower surface of the head rest main body 10, but these film materials 20, 20 were arranged at a length that could form the foaming material injection port 22. It is sufficient if they are placed across the board.

Further, in the above embodiment, each film material 20 and the skin material 18 at the formation site of the foaming raw material injection port 22 are
In order to prevent the foaming raw material 26 from leaking from between the ends 19 of the skin material 18, the end 1 of the skin material 18 is
9 is folded back at the tip thereof, and the folded portion is integrally sewn and joined to the end 19 of the skin material 18 at a portion other than the area where the foaming material injection port 22 is formed. However, by separately joining the overlapping portions of the corresponding end 19 of the skin material 18 and the film material 20 at the formation site of the foaming material injection port 22, leakage of the foam 12 from between them can be prevented. It is also possible to prevent this.

In addition, in the above embodiment, as shown in FIG. 3, at the stage where the core body insertion port is joined, the film materials 20, 20 are overlapped in a state in which they are in close contact with each other even at the forming part of the foaming material injection port 22. However, it is also possible to form a predetermined opening between the film materials 20 and 20 at the formation site of the foaming material injection port 22 at the stage of joining the core body insertion port. be. In this way, the injection nozzle 24 can be inserted into the foaming material injection port 22 more smoothly.

Furthermore, in the embodiment, each film material 20,
20 is arranged on the end 19 of the skin material 18 after inserting the core body, but these film materials 20, 20 are attached to each skin material 18 at the stage of sewing the semi-sewn product of the bag-shaped skin 14. Alternatively, in the case where the core body insertion opening is formed in another part, the film may be pre-bonded to the end 19 of the bag-like skin 14 at the stage of sewing the semi-sewn product. It is also possible to connect the parts where the materials 20, 20 are provided by sewing.

Furthermore, in the previous embodiment, the film materials 20, 2
Although a urethane sheet with a thickness of 30 μm is used as the film 0, any flexible film may be used, and the thickness thereof may be appropriately selected.

Although not listed in detail, it goes without saying that the present invention can be implemented with various changes, modifications, improvements, etc. without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an example of a headrest equipped with a foaming material injection port structure according to the present invention, in an upside down configuration. FIG. 2 is a cross-sectional view of the main part showing the sewing joint part of the film material arrangement part in the bag-shaped skin of the headrest shown in Fig. 1, and FIG. FIG. FIG. 4 is a sectional view corresponding to FIG. 3 showing the process of injecting foaming raw material into the bag-like skin of the headrest shown in FIG. 1;
FIG. 5 is a partially cutaway perspective view showing the set state of the bag-like skin in the mold during the foaming operation of the foaming raw material, and FIG. FIG. 3 is a sectional view corresponding to the figure. 10: Headrest body, 12: Foam, 1
4: Pouched skin, 16: Stay, 18: Skin material, 1
9 terminal (of skin material), 20: film material, 22:
Foaming raw material injection port, 24: Injection nozzle, 26: Foaming raw material, 28: Molding mold, 32A, 32B, 34A,
34B: Split type.

Claims (1)

[Claims of Utility Model Registration] This product is formed by foaming a predetermined foaming raw material inside a bag-shaped skin formed by sewing and joining a plurality of skin materials. In an integrally foamed molded product having a sewn outer skin, a pre-filling predetermined foaming material is injected into the inner side of the skin through a predetermined nozzle that is formed in the bag-shaped skin so that the inside and outside of the skin communicate with each other and is inserted. An injection port structure for the foamed raw material that allows the injection port to be inserted between predetermined corresponding terminals of the skin material to be sewn and joined, such that a predetermined dimension protrudes from the overlapped portion of the terminals toward the outer surface side of the bag-shaped skin material. By arranging two film materials in a state of overlapping each other, and sewing and joining the ends of the skin material on which the film materials are arranged, leaving a part of it unjoined, A foam raw material injection port structure for an integrally foamed molded product having a sewn outer skin, characterized in that an overlapping portion of the film material in the unjoined portion serves as an injection port for inserting the nozzle.