JPH047684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention [Field of Industrial Application] The present invention relates to a cushion body suitable for use in seat bags of vehicles, especially automobiles, and a foam mold thereof.

[Conventional technology and its problems]

A conventionally known cushion body of this type is, for example, one shown in FIG. This cushion body has a flange portion 2 facing inward of the cushion portion 1 integrally formed on the upper side and both sides of the back side of the cushion portion 1 having a substantially rectangular shape,
Furthermore, a folded tongue piece 3 is formed on the lower side of the cushion part 1, projecting approximately at right angles to the back surface 1a of the cushion part 1.

Such a cushion body generally has a frame (not shown) pushed between the back surface 1a of the cushion part 1 and the flange 2, and a folded tongue piece 3.
Wrap the lower side of the frame by bending it inward as shown by arrow A in the figure, and further,
They are put into use by wrapping their outsides with an outer skin, which is also not shown. Note that the flange portion 2 and the bent tongue piece 3 that cover the frame are as follows:
It prevents direct contact between the frame and the outer skin, provides a view of the back of the seat back, and also serves to provide sufficient protection for people or objects that collide with the frame.

However, in the case of such a cushion body, due to circumstances such as closing and opening the foaming mold, and removing the cushion body from a fixed or movable mold, one side of the back side of the cushion portion 1, in the figure, Since it was not possible to form a flange on the lower side, and the function of the flange there was brought about by the folded tongue 3, in order to maintain the folded tongue 3 in the same inward direction as the flange 2. However, there is a problem in that it requires the use of bending restraints and man-hours for their installation.On the other hand, if the restraints come off or if the restraints are not used in the first place, bending Since the tongue piece 3 tries to return to its original shape by its own elastic restoring force, the outer skin surrounding the cushion body bends over the tongue piece 3, especially its tip part, which is generally much harder than other parts. There was a problem in that the seat bag was greatly deformed towards the back side, impairing its appearance.

Furthermore, even when the posture of the tongue piece 3 is maintained by using a bending restraint device, if creases occur there, the wrinkles cause unevenness on the outer skin, spoiling the appearance of the seat bag. There was a problem.

[Purpose of the invention]

The present invention provides a cushion body and a foam mold thereof that advantageously solves the problems of the prior art.

(2) Structure of the invention [Means and effects for solving the problems] The cushion body of the present invention has, for example, a flange portion facing inward on each side of the back side of the rectangular cushion portion. According to this cushion body, the flange portions on each side of the cushion body can cover the four sides of the frame without forcibly bending and deforming the constituent parts of the cushion body, so there is no possibility that the outer skin surrounding the cushion body will be deformed. That's not the case at all, resulting in an always nice appearance on the back of the seat back.

Further, the foaming mold of the present invention is provided with a core member forming a flange portion of the cushion body around the movable mold, and at least a portion of the core member is made vertically rotatable. In this foam mold, when removing the foam molding, in other words, the cushion body from the movable mold, by rotating the rotating part of the core member relative to other parts, the flange parts provided on the four sides of the cushion body, for example, are removed. , since it is possible to make it extremely easy to remove at least a portion corresponding to one side from the movable mold,
It becomes possible to manufacture a cushion body having a flange portion around the entire circumference, which could not be manufactured using conventional techniques.

〔Example〕 The present invention will be explained below based on illustrated examples.

FIG. 1 is a diagram showing an embodiment of the cushion body, and in the figure, reference numeral 11 indicates the entire cushion body.

This cushion body 11 is integrally molded with a cushion part 12 whose front and back shapes are substantially rectangular, and a flange part 1 facing inward on the back side thereof.
It has 3.

Here, the flange portion 13 formed around the entire circumference of the cushion portion 13, in other words, on all sides, is intended to facilitate the removal of the cushion body 11 from the mold, as is clear from, for example, FIG. 1a. , a linear slit 1 provided at each corner of the
Preferably, it is divided into four parts by 4. Note that the method of dividing the flange portion 13 using the slits 14 is of course not limited to the illustrated example, but when the flange portion 13 is divided at the corner portion, each division Since the portions 13a, 13b, 13c, and 13d all extend substantially linearly, when removing the cushion body 11 from, for example, a movable mold after molding is completed, it is necessary to remove the divided portions in any three directions before removing the mold from the movable mold. , for example, divided portions 13b, 13c, 13d
By slightly elastically deforming the cushion part 12 in the outward direction as shown by the arrow d in the figure, the adhesion between the divided parts 13b, 13c, 13d and the movable mold is peeled off in advance, and then , the divided portion 13a is largely elastically deformed in the outward direction of the cushion portion 12 as shown by the arrow e in the figure to expose the end face of the movable mold, and then, while maintaining this deformed state of the divided portion 13a, the cushion body is This can be easily done without damaging the cushion body 11 by pulling out the whole body in the direction of the divided portion 13c as shown by the arrow f in the figure.

Also, the flange portion 13 here and its respective divided portions 13a, 13b, 13c, and 13d are all clear from FIGS. As shown in FIG.
Cushion part 1 via 16b, 16c, 16d
2, and these spacer parts 1
6a, 16b, 16c, 16d are frame portions 17a, 17b, 17c, 17d of predetermined dimensions,
Each divided portion 13a, 13b, 1 of the flange portion 13
3c and 13d without causing deformation, and acts to fit the top between them and the back surface 15.

Therefore, according to this cushion body 11, each divided portion 13a, 13b, 13 of the flange portion 13 can be inserted into the frame 17, which has a rectangular shape, for example, without bending and deforming the cushion body constituent parts.
c, 13d can be reliably covered, and by this, either of the divided parts 13a,
Since 13b, 13c, and 13d are not elastically deformed, the appearance of the outer skin surrounding them and the appearance of the back side of the seat bag are not impaired. Here, among the divided portions 13a, 13b, 13c, and 13d of the flange portion 13, those that protrude long from the frame portion may be fixed to a spring body (not shown) stretched over the cushion portion 12 or the frame 17.

Note that 18 in the figure indicates a headrest mounting hole provided at the top of the cushion body 11.

FIG. 2 is a perspective view showing another embodiment of the cushion body, and the flange portion 13 of this example has a divided portion 13e continuous to three sides of the cushion portion 12, here the top side and both sides, and other parts. It consists of a divided portion 13a divided by a slit 14 provided at both ends of one side, here the lower side.

The divided portion 13e here is not subdivided like the divided portions 13b, 13c, and 13d in the example described above, so when removing the mold of the cushion body 11 in this example, the divided portion 13e is deformed by its elastic deformation. For example, although it is not possible to separate the cushion body 11 from the movable mold in advance, it is possible to remove the cushion body 11 from the mold without damaging the cushion body 11 by performing other operations similar to the above-described example.

The flange portion 13 in this example also functions in the same manner as in the previous example, resulting in a consistently excellent appearance on the rear side of the seat bag.

In this example, the flange portion protruding from the lower side of the cushion portion 12 is divided from the other portions, but such division may also be performed at any other side portion.

Further, although the cushion body 11 shown in FIGS. 1 and 2 is constructed so that a separately molded headrest portion is attached thereto, it is also possible to construct them in one piece.

The cushion body 11 shown in FIGS. 1 and 2 has been described above, but when using a foaming mold to be described later, the cushion body 11 can be removed from the mold without damaging it without providing any slits 14. be able to.

FIG. 3 is a cross-sectional view illustrating a foaming mold suitable for use in molding the cushion body 11 described above. In the figure, 21 indicates a fixed mold that provides the desired shape on the surface side of the cushion body 11. Reference numeral 22 designates movable molds that create a desired shape on the back side of the cushion body 11.

In this example, a movable mold 22 as an upper mold that forms a mold cavity 23 in cooperation with a fixed mold 21 as a lower mold is attached to a frame 25 that is rotatable around a fulcrum 24 and fixed to this frame 25. and a contour member 26 which forms the outer surface of the flange portion of the cushion body 11, and further includes a back molded member 27 which forms the back surface portion of the cushion portion 12 located between the tips of the flange portions of the cushion portion 12, and this back molding. A tang member 28 is provided adjacent to member 27 and extending into the underside of profile member 26.

Here, the contour member 26 and the core member 28 are
Both can be provided on all sides of the cushion body 11, which may have a rectangular shape, for example.

Further, in this example, a core portion 28a of the core member 28, which forms the flange portion 13 at the end portion in the length direction of the cushion body 11, in other words, at its lower end portion, is divided from the back molded member 27, and A portion of the core portion 28a adjacent to the back molded member 27 is pivotally supported by a bracket 29 projecting downward from the frame 25, thereby enabling vertical rotation of the core portion 28a.

Here, the remaining parts of the back molded member 27 and the core member 28 except for the core part 28a are integrally molded, and the molded body 28b is also attached to the core part 2.
The molded body 28b is pivoted to a downward bracket 29 at a position adjacent to the molded body 8a, thereby making it possible to rotate the molded body 28b in the vertical direction.
It is not an essential requirement for this device, but the molded body 28
b to the frame 25, the back molding member 27 to the frame 25, and the core part 2
In addition to 8a, the core portion facing this portion may be made rotatable relative to the back molded member 27. The same applies to the core portion forming the flange portion 13 at the end portion in the width direction of the cushion body 11, and in place of the core portion 28a or together with the core portion 28a, at least one of the core portions It is also possible to make the parts rotatable.

In the illustrated example, the rod 30 is implanted in the molded body 28b which is rotatable around a fulcrum,
This rod 30 is attached to the flange 25a of the frame 25.
By passing through the molded body 28b and arranging the coil spring 31 at the penetrating end portion
is energized in the direction of approaching the frame 25. Therefore, when forming the mold cavity 23, the molded body 28b is always maintained at its predetermined position as shown in the figure. On the other hand, the core portion 28a is
When forming the mold cavity 23, it can be maintained in a predetermined position by, for example, a pin (not shown) protruding from the fixed mold 21.

Note that the core portion 28a can be urged to a predetermined position by an elastic member in the same way as the molded body 28b, or conversely, the molded body 28b can be protruded from the fixed mold 21 and abutted thereon. It can also be held in place with pins. By the way, the core member 28a and the molded body 28b are held together by the pins protruding from the fixed mold 21.
When maintaining the molds in a predetermined position, it is preferable to connect their rotating end portions to the frame 25 by chains, ropes, etc. in order to specify their rotating positions when the mold is opened. .

FIG. 4 shows a modification of the means for maintaining the core portion 28a in a predetermined position during the formation of the mold cavity 23, and the one shown in FIG. and the one shown in Figure 4b is
A pair of magnets 33 are provided on the core portion 28a and the frame 25. Furthermore, although not shown, a moment arm and a weight may be integrally provided on the core portion 28a to exert a rotational moment on the core portion toward the outside of the mold cavity at the position of the core portion shown in FIG.

According to the foaming mold configured in this way, it is possible to foam-mold the cushion body 11 made of, for example, polyurethane and having a desired shape in the mold closed state as shown in FIG. An inwardly directed flange portion 13 based on the action of the core member 28 is provided on each side portion of the cushion body 11 forming a
is formed.

To remove the cushion body 11 from the mold after molding, first, as shown in FIG. 5, the movable mold 22 is rotated around the fulcrum 24 to open the mold. At this time, the cushion body 11 is lifted up while adhering to the back molding member 27 and the core member 28 of the movable mold 22, as shown by solid lines in the figure. are both rotated downwardly around their fulcrums by the weight of the cushion body 11, and as a result, the flange portion 13 of the cushion body 11
The adhesion between the core member 28 and the contour member 26 is completely and reliably peeled off, and the distance between the mutually opposing edge portions of the core member 28, in other words, the distance in the vertical direction of the cushion body 11 is shortened. There is considerable slack in the vertical direction.

Thereafter, the flange portion 13 formed on the core portion 28a is peeled off therefrom, and the flange portion is removed from the core portion 28a.
Here, this flange portion can be removed extremely easily because that portion does not contact the contour member 26 and the cushion body 11 is loosened in the vertical direction compared to when it was molded. The removal will not cause tearing or other damage to the cushion body 11.

Finally, attach the cushion body 11 to the core part 2.
The cushion body 11 is removed from the flange portion formed on the core portion 28a by pulling it away from the core portion 8a.
is extracted from the back molded member 27 and the core member 28.

Therefore, according to this foaming mold, the cushion body 11 having flanges on all sides can be reliably removed from the mold without damaging it, especially by the rotational movement of the core portion 28a.

In addition, in this foaming mold, even when parts other than the core part 28a are made rotatable, the molded body can be removed in substantially the same manner as described above. Further, according to this foaming mold, it is possible to mold a cushion body having a curved surface portion on the circumferential surface, and it is also possible to mold a cushion body that does not have a flange portion on some of the side portions or curved portions.

(3) Effects of the Invention Therefore, according to the cushion body of the present invention, since the cushion body has an inwardly directed flange portion that is either divided or undivided around the entire circumference of the cushion body, the outer skin surrounding the cushion body has a structure similar to that of the cushion body. It is not deformed outwardly by the parts, which results in an always excellent appearance of the back of the seat bag.

Furthermore, in the foaming mold of the present invention, at least a portion of the core portion rotates in the vertical direction, so that when the mold is opened, at least one of the vertical and width dimensions of the cushion body is made shorter than that during molding. Therefore, even if the cushion body has an inward flange portion around the entire circumference of the cushion portion, it can be removed from the mold extremely easily and without causing any damage to the cushion body. I can do it.

[Brief explanation of drawings]

FIG. 1 is a perspective view and a sectional view illustrating a cushion body of the present invention, FIG. 2 is a perspective view illustrating another example of the cushion body, and FIG. 3 is a sectional view illustrating a foaming mold of the present invention. FIG. 4 is a sectional view showing a means for maintaining the core portion, FIG. 5 is a sectional view showing the device shown in FIG. 3 in an open state, and FIG. 6 is a perspective view showing a conventional cushion body. 11...Cushion body, 12...Cushion part, 13...Flange part, 13a, 13b, 13
c, 13d...Divided portion, 14...Slit, 1
5... Back side, 17... Frame, 17a, 17
b, 17c, 17d...Frame part, 21...
Fixed type, 22... Movable type, 23... Mold cavity, 24... Fulcrum, 25... Frame, 26...
Contour portion, 27...back molded member, 28...core member, 28a...core portion, 28b...molded body,
29... Bracket, 30... Rod, 31,3
2...Spring, 33...Magnet.

Claims (1)

[Claims] 1. A cushion body comprising a cushion portion and a flange portion integrally molded with the cushion portion and facing inward on the back side of the cushion portion, wherein the flange portion is formed around the entire circumference of the cushion portion. A cushion body characterized by this. 2. In a foaming mold for a cushion body comprising a fixed mold and a movable mold that forms a mold cavity in cooperation with the fixed mold, a core that forms a flange portion of the cushion body is placed around the movable mold. 1. A foam mold for a cushion body, characterized in that a member is provided, and at least a portion of the core member is vertically rotatable.