JP3472365B2 - Mold for pad part for swing headrest - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming tool for a head portion of a swing headrest, which foam-molds a cushion pad integrally with a cushion frame having a swing mechanism housed therein as a pad portion for a head swing headrest. is there.

[0002]

2. Description of the Related Art Generally, in a swing headrest, a ratchet type swing mechanism having a ratchet on the shaft upper end side of a headrest pillar, or a friction bearing having a plate-shaped cored bar bearing mounted on the shaft upper end side of the headrest pillar. Equipped with a swinging mechanism. The pad part for the swing headrest is formed by foam-molding a cushion pad with a molding die integrally with a headrest frame blow-molded so that the headrest pillar is projected outside the frame to accommodate the swing mechanism inside. Being manufactured.

Conventionally, when the headrest frame is blow-molded, as shown in FIG. 12, a headrest pillar 1a is formed.
The headrest frame 2 is hermetically formed so that the foamed resin does not enter into the inside from the axis around which the projecting portion protrudes. When this headrest frame 2 is hermetically formed, a redundant burr-like adhered portion 2a is generated around the axis of the headrest pillar 1a as shown in FIG. 13, so that the cushion pad 3 is integrally foamed as an excessive portion as shown in FIG. After molding, it is cut and removed with a heating cutter or the like.

Since the surplus adhered portion 2a is cut off after the cushion pad 3 is foam-molded integrally with the headrest frame 2, it must be removed by hand. Further, when removing the adhering portion 2a, the adhering portion 2
Since it is necessary to cut and remove the peripheral pad portion together with a, and to form the headrest main body as an elongated hole-shaped opening 4 that allows swinging and swinging in the front-rear direction, the opening 4 is formed. In order to do so, skilled techniques are required, and it is troublesome and lacks workability.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a long hole-shaped opening for allowing swinging and swinging of the headrest body is provided in advance on the bottom surface of the headrest frame, and a cushion pad is mainly formed integrally with the headrest frame. An object of the present invention is to provide a mold for a swing headrest pad portion that prevents foamed resin to be molded from entering into the inside of the headrest frame from an elongated hole portion.

[0006]

In a mold for a head swing pad portion according to a first aspect of the present invention, a headrest pillar is formed from an elongated hole-shaped opening portion that allows swing movement of the headrest body. A mold body that inserts a headrest frame that projects outside the frame and houses a swing mechanism inside the mold, and a headrest pillar that protrudes out of the mold through a pillar insertion hole that is open across both mating surfaces. It has a mold body and a split mold that can be clamped, and the cushion pad is foam-molded integrally with the headrest frame from foamed resin. It is used for surfacing of the headrest frame that positions and fixes the terminal, and the pillar through holes that open over the mating surfaces on both sides are provided so as to correspond to the split pillar insertion holes. In addition, two sets of elastic bodies that have an outer shape that covers the opening of the headrest frame and covers the frame surface around the hole can be installed separately in each mold so that they can be combined at the mating surface position of the split mold. It is composed of

A molding die for a head portion of a swing headrest according to a second aspect of the present invention is provided with two sets of elastic bodies having inclined surfaces facing each other as mating surfaces.

[0008]

In the molding die for the head portion of the headrest frame according to the first aspect of the present invention, there are provided two sets of elastic bodies that seal the opening portion of the headrest frame and cover the opening portion of the headrest frame to form a hole. Since it has an outer shape that covers even the frame surface of the headrest frame, the opening part of the headrest frame can be reliably sealed with an elastic body, and the frame surface of the headrest frame that fixes and fixes the end of the headrest skin to be covered with the pad part Chamfering can be performed around the hole of the opening.

According to the second aspect of the present invention, in the mold for the swing headrest pad portion, since two sets of elastic bodies having inclined surfaces facing each other as mating surfaces are provided, the elasticity in which the mating surfaces face downward is provided. By matching or unmolding the split mold including the body, it is possible to prevent the elastic bodies from interfering with each other when the split mold is opened and closed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to FIGS. 1 to 11, a pad head portion for a swing headrest according to the illustrated embodiment includes two headrest pillars 10a and 10b.
Is integrally foamed with the headrest frame 11 that has the swinging mechanism 10c housed therein.
The swing mechanism 10c may be either a ratchet type or a friction type. The headrest frame 11 can be blow molded from a parison such as polypropylene.

The headrest frame 11 is inserted into the mold 20 as shown in FIG.
The cushion pad 12 is integrally foam-molded as a pad portion by a foamed resin such as urethane foam filled in the mold. Further, since a headrest skin (not shown) is attached to the pad portion, it is formed as a headrest body. The swing mechanism 10c is mounted and fixed inside the headrest frame 11 at a predetermined portion other than the movable portion.

On the bottom surface of the headrest frame 11,
As shown in FIG. 2, elongated hole portions 13a and 13b are formed in advance so as to open around the axes of the headrest pillars 10a and 10b. The openings 13a and 13b are
It is formed as a long hole in the front-rear direction that allows swinging and swinging of the headrest body. The holes 13a and 13b
In the same manner as the conventional example, after the blow molding of the headrest frame 11, the headrest frame 10 and the headrest pillars 10a and 10b including the sticking portion can be cut out around the axes with a heating cutter or the like.

Since the cutout molding of the openings 13a and 13b is performed before the foam molding of the cushion pad 12, it can be accurately formed on the bottom surface of the headrest frame 11 as a long hole having a predetermined shape and requires a skilled technique. You can easily do it without it. Further, since a cutting-out means such as an automatic cutter can be applied, it is possible to efficiently carry out the drilling work including the removal of the excessive adhered portion.

As shown in FIG. 3, the molding die 20 is an upper die 21 of a split die which can be split into two dies 21a and 21b which are clamped to each other, and a die main body into which the headrest frame 10b is inserted. The lower die 22 and the lower die 22 are assembled. The split mold 21 has headrest pillars 10a, 10
Pillar insertion holes 23a, 23b (FIG.
(See) is the mating surface of each mold 21a, 21b (only one surface is shown)
It is provided so that it may be opened over.

Inside each of the molds 21a and 21b, there are two pairs of elastic bodies 24a and 24b formed of a cushion pad 12 molded from foamed resin and a silicone-based or urethane-based elastic resin having releasability. Elastic pads 24, 25 made of
(See FIG. 1) is an opening 13 of the headrest frame 11.
a and 13b, and are provided so as to be combined at the mating surface position of the split mold 21. However, since the elastic pads 24 and 25 have a common configuration,
Only one set 24 on one side will be described with branch numbers.

The two sets of elastic bodies 24a and 24b are shown in FIG.
As shown in, the opening 13a of the headrest frame 11
The pillar through hole 24c for receiving the more protruding headrest pillar 10a is the pillar insertion hole 23 of each mold 21a, 21b.
It is provided so as to correspond to a and open across the mating surfaces 24d and 24e on both sides. Each elastic body 24a, 2
Since 4b serves not only for sealing the openings 13a, 13b but also for surfacing the headrest frame for positioning and fixing the end of the headrest skin, it covers the openings 13a, 13b of the headrest frame 11 and surrounds the holes. A frame having an outer shape that covers even the frame surfaces 11a and 11b is provided.

In the elastic bodies 24a and 24b, the mating surfaces 24d and 24e are formed by inclined surfaces which are diagonally opposed to each other. Including this configuration, the elastic bodies 24a and 24b have an outer shape larger than the ring shape of the long hole-shaped opening portions 13a and 13b, and have a thickness of about 5 to 10 mm and 0.5.
It is preferable to provide a material having a crushing margin of about 1.0 mm.

In addition to the above-mentioned components, the molding die 20 has the headrest pillar 10a directed upward, and the headrest frame 10b is erected vertically and inserted into the molding die 20. Pillar 1
The standing plates 27a and 27b provided with the clips 26a and 26b for supporting the shaft portion of the shaft 0a are fixed to the half mold 21a.
Mounted on the upper side (see FIGS. 1 and 3).

In the molding die 20, as shown in FIG. 5, the headrest pillar 10a is directed upward, the headrest frame 10b is inserted vertically downward in the die of the lower die 22, and the axial portion of the headrest pillar 10a is arranged. By engaging with the clip 26a, the headrest frame 10b is held inside the lower mold 22 by the standing plate 27a of the split mold 21a clamped to the lower mold 2. The foamed resin E is applied to the lower mold 2 while the half mold 21b of the split mold 21 is opened.
It can be filled in the mold of 2.

After filling the foamed resin, the half mold 21b is aligned with the other mold 21a and the split mold 21 is clamped to the lower mold 22. Along with the mold matching of the molds 21a and 21b, a half mold 21b including an elastic body 24b with a mating surface 24e facing downward.
When the molds are matched with each other, the mating surfaces 24 of the elastic bodies 24a, 24b
Since the d and 24e do not interfere with each other, the split mold 21
Can be easily assembled as a mold. In addition, the elastic bodies 24a, 24
When b is assembled on the mating surfaces 24d and 24e, the axial portion of the headrest pillar 10a is sandwiched by the pillar through holes 24c, and the lower surfaces of the elastic bodies 24a and 24b cover the opening portions 13a of the headrest frame 11 and are covered around the edges. Therefore, the opening portion 13a of the headrest frame 11 can be hermetically sealed by the elastic pad 24.

As the resin foams, as shown in FIG. 6, the foamed resin gradually expands and rises in the mold 20, but the opening 13 of the headrest frame 11 has an elastic pad 24.
Since it is airtightly sealed, the foamed resin can be prevented from entering the inside of the headrest frame 11. Further, since the periphery of the elastic pad 24 becomes an air pool due to the foaming of the resin, the foamed resin does not enter the inside of the headrest frame 11 by the seal of the elastic pad 24, as a matter of course.
It can also be prevented from leaking out of the mold through the pillar insertion hole 23a.

When the resin foaming is completed, a cushion pad 12 is integrally foam-molded on the headrest frame 11, and the cushion pad 12 is formed as a pad portion for a swing headrest. When the pad portion is released from the mold, the elastic pads 24 and 25 are used as the cushion pad 1.
2 and releasability, and each split mold 2 as shown in FIG.
Since the elastic bodies 24a and 24b can be separately opened together with 1a and 21b, the pad portion can be easily removed from the entire die including the upper die 21.

As shown in FIG. 8, the pad portions expose the frame surfaces 11a and 11b of the headrest frame 11 around the holes 13a and 13b, so that step portions 14a and 14b are formed by elastic pads. To be done. The end of the headrest skin that covers this pad is the step 14
Headrest frame 1 rolled up inside a and 14b
Since it is positioned and fixed to one frame surface 11a, 11b, the terminal can be finished beautifully as a product.

In addition to this, when the bottom portion of the pad portion is bulged around the outer periphery to form a depression 15 for lowering and opening the openings 13a and 13b of the headrest frame 11, the headrest frame 11 is provided. Opening 13
Since a and 13b can be arranged so as not to be seen from the outside, it can be formed in a better appearance.

Although the elastic pads 24 and 25 described above are formed to have a uniform thickness, as shown in FIGS. 9 and 10, at least one elastic body 24b is attached to the periphery of the opening portion 13. It is provided with a convex portion 26g that fits inside the opening portion 13 from the base portion 26f.

In the elastic pad 24, the periphery of the opening 13a is hermetically sealed by the base portion 26f, and the convex portion 26 is formed.
By fitting g into the hole of the opening 13a, the opening 13a can be sealed more reliably and airtightly. Also, by any chance,
The foamed resin is applied to the headrest frame 11 through the opening 13a.
11 can be attached to the inner side of the opening 13a so as not to hinder the swing movement of the headrest body, as shown in FIG.

The above-mentioned convex portion 26g is provided only on the elastic body portion 26b on one side, but in the case where the headrest pillar 10a is positioned in the center of the opening portion 13a and assembled to the molding die, both elastic bodies 24a and 24b are formed. It can be provided in.

[0028]

As described above, according to the mold for the swing headrest pad portion according to the first aspect of the present invention, the outer shape covering the opening portion of the headrest frame and covering the frame surface around the hole. Since two sets of elastic bodies having the above are installed separately in each mold so that they can be combined at the mating surface position of the split mold, the opening of the headrest frame can be reliably sealed and the cushion pad is made of foamed resin. Not only can it be foam-molded to the outer shape of the street, but also the frame surface of the headrest frame can be formed by surfacing around the hole of the opening, so that the end of the headrest skin that covers the pad part can be formed on the surface of the headrest frame Since it is positioned and fixed, the product can be finished beautifully as a terminal.

According to the molding die for the head portion of the swing headrest according to the second aspect of the present invention, since the two sets of elastic bodies having the inclined surfaces facing each other as the mating surfaces are provided, the mating surfaces face downward. Since the molds are fitted or unmolded from a split mold having an elastic body to be used, it is possible to prevent the elastic bodies from interfering with each other when the split mold is opened and closed, and the openings of the headrest frame are formed by the elastic bodies. Can be surely sealed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a molding die for a swing headrest pad portion according to the present invention in a state in which a headrest frame is assembled.

FIG. 2 is a perspective view showing a headrest frame assembled to the molding die from the bottom side.

FIG. 3 is a cross-sectional view showing the mold with the mold opened.

FIG. 4 is a partial cross-sectional view showing a headrest frame in pressure contact with an elastic pad of the same molding die.

FIG. 5 is a cross-sectional view showing the molding die in a state where a foamed resin is injected.

FIG. 6 is a sectional view showing the molding die in a resin foaming state.

FIG. 7 is a cross-sectional view showing the same mold in a mold open state.

FIG. 8 is a partial perspective view showing a pad portion manufactured by the same molding die from the bottom side.

FIG. 9 is a partial cross-sectional view showing a molding die according to the present invention in which another form of elastic body is provided.

FIG. 10 is an explanatory view showing a fitted state of the elastic body in the opening portion on the bottom surface of the headrest frame.

FIG. 11 is an explanatory diagram showing an advantage of the molding die including the elastic pad of FIG. 9.

FIG. 12 is a perspective view showing a headrest frame used in a method of manufacturing a swing headrest pad portion according to a conventional example from the bottom side.

FIG. 13 is a cross-sectional view showing a pad portion manufactured by the same method.

FIG. 14 is an explanatory view showing an excess attachment portion cut out from the headrest frame of the pad portion.

[Explanation of symbols]

10a, 10b Headrest pillar 10c Swing mechanism part 11 Headrest frame 11a, 11b Face-out frame surface 12 of headrest frame Cushion pad 13a, 13b Opening part 20 of headrest frame Mold 21 Split mold 21a, 21b Split mold 22 Mold bodies 23a, 23b Pillar insertion holes 24, 25 Elastic pads 24a, 24b Two sets of elastic bodies 24c Pillar through holes 24d, 24e Mating surfaces of elastic bodies

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI B29K 105: 20 B29K 105: 20 B29L 31:58 B29L 31:58 (56) Reference JP-A-5-337965 (JP, A) 5-26322 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B29C 39/00-39/44

Claims (2)

(57) [Claims] 1. A mold for inserting a headrest frame having a swinging mechanism accommodated therein into a mold by projecting a headrest pillar out of the frame through an elongated hole-shaped opening that allows swinging and swinging of the headrest body. The cushion pad is made of foamed resin and has a main body and a split mold that allows the head main body to be clamped from the mold body by projecting it out of the mold through a pillar insertion hole that is open across both mating surfaces. In a mold that is foam-molded integrally with the headrest frame, it is used for sealing the opening part of the headrest frame and for exposing the headrest frame that positions and fixes the end of the headrest skin, and opens over both mating surfaces. The pillar through hole is made to correspond to the split type pillar insertion hole, and covers the opening of the headrest frame to cover the frame surface around the hole. Duplicate combinations capable mold for swinging the headrest pad portion, characterized in that fitted separately into the mold of the mold an elastic body at the mating surface position of the split mold having a shape shape. 2. The molding die for a head portion of a swing headrest according to claim 1, further comprising two sets of elastic bodies having mutually facing inclined surfaces as mating surfaces.