JPH1014707A - Foamed head rest integrated with skin material and foam molding method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the leakage of a foaming stock soln. from a foaming stock soln. injection port and to improve hermeticity while commonly using a frame insertion port and this injection port and to prevent the occurrence of meandering in the injection port of a skin material and appearance defect, such as floating, by a difference in foaming pressure. SOLUTION: The injection port 15 of the skin material 11 of this head rest is formed by respectively turning back ends 15a, 15b to the inner side. The injection port 15 is sewn one round by sewing threads 17 along its ends 15a, 15b of the injection port 15 in the state of opening the ends 15a, 15b of the injection port 15, and stays 12a are projected upward to the skin material and are inserted and held. The skin material is arranged in a foam molding mold and a pad material is integrally foam-molded in the state of applying tension on the end of the injection port 15 and hermetically closing the port by outward pulling the ends 15a, 15b sewn one round with the sewing threads 17 of the injection port 15 of the skin material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headrest frame and a stay connected to the headrest frame, which are inserted from an inlet of a skin material of the headrest, and a tip end side of the headrest stay is located outside a stay insertion hole of the skin material. The skin material is placed in the foaming mold while projecting into the foam material, and the foam material is injected through the injection hole formed in the skin material, and the pad material is integrally foamed. The present invention relates to a headrest and a foam molding method thereof.

[0002]

2. Description of the Related Art A conventional foam headrest integrated with a skin material is:
For example, as shown in FIG. 5, a frame insertion / foam solution injection port 5 is formed on the stay projecting surface 1a side of the skin material 1 of the headrest, and a vertical rod portion 2a,
A headrest frame 2 formed in a U-shape by a 2a and a central rod 2b connecting these vertical rods 2a, 2a at the lower end thereof is inserted into the frame of the skin material 1 and a liquid injection port 5 for the foaming liquid.
More inserted.

In order to prevent the foaming solution from leaking to the outside from the frame insertion / foaming solution injection port 5 of the skin material 1, the injection port 5 is formed by folding the ends 5a and 5b of the skin material 1 inward. ing. The frame 2 is inserted through the frame insertion / foaming solution injection port 5 and the vertical rods 2a, 2
In a state in which the front end side of a is protruded outward from the insertion holes 1b, 1b, the skin material 1 is disposed in the foaming mold, and the foaming solution is injected from the frame insertion / foaming solution injection port 5, and the foaming cure treatment is performed. The pad material 3 is formed by foaming.

The provision of the frame insertion / foaming solution injection port 5 has the advantage that it is not necessary to close the injection port 5 with a closing member or the like, but the end 5a of the injection port 5 of the skin material 1 is advantageous. , 5b are not stable in the bending direction, and there is a fear that a poor appearance may occur.

For this reason, as shown in FIGS. 6 (a) and 6 (b), shape holding members 7, 7 such as resin plates, boards, urethane, etc. are sewn to the ends 5a, 5b of the skin material 1, or The injection port 5 is fixed by the clip 8.

[0006]

However, in the conventional foam headrest with integral skin material, the end portions 5a and 5 of the skin material 1 are not provided.
b, the shape holding members 7, 7 such as resin plate, board, urethane, etc. must be sewn to each other, and the operation becomes complicated, or it is necessary to close the foaming liquid inlet 5 with the resin clip 8, and the operation is complicated. And lacked economy.

The present invention has been made in view of the above-mentioned unsolved problems of the prior art, and there is a possibility that the undiluted foaming liquid leaks from the inlet while using both the frame insertion port and the undiluted foaming liquid injection port. To provide a skin material-integrated foam headrest and a foam molding method thereof, which are excellent in hermeticity, do not meander in the injection port of the skin material due to a difference in foaming pressure, and are not likely to cause appearance defects such as floating. The purpose is.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a skin material-integrated foam headrest according to claim 1 of the present invention comprises: Inserting the stay connected to the headrest frame, disposing the front end side of the headrest stay outward from the stay insertion hole of the skin material and inserting and holding the same, the skin material is disposed in the foaming mold, and the skin material is provided. In the skin material integrated foaming headrest formed by injecting the foaming undiluted solution from the injection port formed in the above and integrally foaming the pad material, the injection port of the skin material of the headrest is formed such that the ends are respectively turned inside. While the end of the injection port is opened, a sewing thread is sewn around the end of the injection port one round, and a stay is inserted and held by projecting a stay upward to the skin material, The pad material is integrally foam-molded in a state where the sewing machine thread of the injection port of the skin material is sewn around the circumference, pulled outward, tension is applied to the end of the injection port, and the end is sealed. And

According to a second aspect of the present invention, there is provided a foam molding method of a foam headrest integrated with a skin material, wherein a headrest frame and a stay connected to the headrest frame are inserted from an inlet of the skin material of the headrest, and a tip of the headrest stay is formed. With the side protruding outward from the stay insertion hole of the skin material and inserting and holding, place the skin material on the foaming mold,
In the foam molding method of a skin material integrated foam headrest formed by injecting a foaming undiluted solution from an injection hole formed in the skin material and integrally foaming the pad material, the injection port of the skin material of the headrest has an inner end. A sewing thread is sewn around the end of the inlet with the end of the inlet being opened while the end of the inlet is open, and a stay is inserted and held by projecting the stay upward to the skin material. In a state where the sewing machine thread of the injection port formed on the stay protruding surface side of the skin material is sewn one round, the end is pulled outward by a tension member, and the end of the injection port is sealed by applying tension thereto. The pad material is formed by integral foam molding.

According to the first aspect of the present invention, the injection port of the skin material of the headrest is formed by folding back the inner end thereof, and the injection port is opened at the end of the injection port. Around the sewing thread is sewn along the circumference, and the sewing thread at the injection port formed on the stay projecting surface side of the skin material is pulled outward at the end where the sewing thread is sewn once, and tension is applied to the end of the injection port. Since the pad material is integrally foamed in a sealed state, after injection of the foaming solution, both ends of the skin material that are folded back inside the injection port at both ends are outside the extension of the injection port. The sewing machine thread sewn around the circumference prevents the skin material from being stretched by the biasing, and the inlet of the skin material is sealed in a uniform shape.

According to the second aspect of the present invention, the injection port of the skin material of the headrest is formed by folding back the inner end thereof, and is formed at the end of the injection port with the injection port opened. A sewing thread is sewn around the skin material, and a stay is inserted and held in the skin material by projecting the stay upward, and a sewing thread of an injection port formed on the stay projecting surface side of the skin material is sewn around the circumference. Is pulled outward by a tension member, and the pad material is integrally foamed in a state where the end of the inlet is sealed by applying tension to the end of the inlet, so after injecting the foaming undiluted solution, at both ends of the inlet of the skin material Both ends folded inside the injection port are urged outward on the extension of the injection port, and the sewing machine thread sewn around the circumference to prevent the skin material from extending due to this bias, and the injection port of the skin material is It is sealed in a uniform shape.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A skin material-integrated foam headrest according to the present invention will be described below with reference to the drawings. 1 to 4 show a skin material-integrated foam headrest according to the present invention and a skin material 11 applied to the foam molding method thereof, respectively.

Here, the skin material 11 of the headrest is formed in a bag shape, and a pair of insertion holes 11b, 11c for inserting the headrest stays 12a, 12a are formed on the stay projecting surface 11a, which is the lower surface when the seat is mounted. At the same time, a frame insertion / injection port 15 is opened which extends parallel to a line connecting the centers of the insertion holes 11b and 11c to near the edge. Here, the frame insertion and injection port 15
Are formed with inner ends 15a and 15b, respectively, so as to extend inward from here along the opening edge.

As shown in FIG. 2 and FIG.
With the ends 15a and 15b of the injection port 15 of
Along the ends 15a and 15b of the injection port 15,
Is sewn all around.

As shown in FIG. 2, a substantially U-shaped vertical rod portion 12a, which forms a headrest stay similar to the above-described conventional example, and a central rod portion 12b connecting them are formed in the skin material 11. The headrest frame 12 is inserted into the skin material 11 and held.

The vertical rod portions 12a, 12a as headrest stays of the headrest frame 12 are inserted into the frame insertion / injection port 15 from the distal end side, and the vertical rod portions 12a, 12a are respectively externally inserted through a pair of insertion holes 11b, 11c. The central rod portion 12b is inserted into and held in the skin material 11 in a protruding state.

The shape of the headrest frame 12 is not limited to the illustrated one, but includes vertical rods 12a, 12a and a central rod 12b which form a headrest stay.
Alternatively, a separate member may be integrally fixed.

A pair of tension members 21 are mounted on the extension of the frame insertion / injection port 15 of the skin material 11 inserted and held inside the foaming mold. In the embodiment of the present invention, a case where a pair of tension members 21 are provided at both ends of the foaming mold will be described. However, at least one of the tension members 21 may be the tension member 21 and the other may be a locking member. Good.

Each of the tension members 21 has a sliding rod 23 rotatably mounted on a support bracket or the like.
The sliding rod 23 has a hook portion 23 a that engages with a side edge of the inlet 15.

The sliding rod 23 of the tension member 21 is urged outward by a tension coil spring (not shown) or the like.
Here, the tension coil spring is set to about 1 kg, whose set load is relatively light.

Next, the foam molding method for the skin material-integrated foam headrest according to the present invention will be described. First, as described above, the headrest frame 12 is inserted into the skin material 11 from the frame insertion / injection port 15 and the vertical rods 12a, 12a are inserted, and their free ends are projected outside from the pair of insertion holes 11b, 11c. And hold it.

In this state, the skin material 11 is inserted into the foaming mold, and the headrest frame 1 protruding therefrom is inserted.
The two vertical rods 12a, 12a are positioned, and both left and right ends of the frame insertion / injection port 15 are arranged to face the tension member 21.

Thereafter, the sliding rods 23 of the right and left tension members 21 are moved.
Are engaged with the left and right ends of the frame insertion / injection port 15 of the skin material 11. When the hook portion 23a is engaged, the hook portion 23a is engaged with the sewing thread 17 sewn along the circumference along the end portions 15a and 15b of the injection port 15.

In the engaged state with the sewing thread 17, the sliding rod 23 slides outward due to the urging force of the tension coil spring, whereby the frame insertion / injection port 15 is pulled in the left-right direction to form a straight line. Becomes

At this time, since the frame insertion / injection port 15 is evenly pulled left and right by the tension coil spring of the tension member 21, the center of the skin material 11 in the left and right direction is aligned with the center of the foaming mold in the left and right direction. Centered.

In this state, the center of the frame insertion / injection port 15 is manually extended in the front-rear direction, and the tip of an injection head for injecting a urethane raw material as a foaming undiluted solution is inserted into the skin material 11. Inject urethane raw material.

Then, after the injection of the urethane raw material is completed,
When the injection head was pulled out from the frame insertion / injection port 15, both ends of the frame insertion / injection port 15 were pulled in the left-right direction by the urging force of the tension coil spring of the tension member 21, and tension was applied to the end of the injection port 15. In this state, the foaming solution can be cured by foaming.

The injection port 15 is closed while being kept linear by the urging force of the spring, so that leakage of the urethane raw material can be prevented, and the frame insertion / injection port 15 is tensioned as described above. By being closed in a linear state in this state, a uniform molded shape can be secured at the position of the frame insertion / injection port 15.

[0029]

As described above, according to the first aspect of the present invention,
According to the skin material-integrated foam headrest described above, the headrest frame and the stay connected to the headrest frame are inserted from the injection port of the skin material of the headrest, and the tip end side of the headrest stay is located outward from the stay insertion hole of the skin material. The skin material is placed in the foaming mold while projecting into the foam material, and the foam material is injected through the injection hole formed in the skin material, and the pad material is integrally foamed. In the headrest, the injection port of the skin material of the headrest is formed by turning an end thereof inward, and a sewing thread is sewn along the end of the injection port with the end of the injection port opened. A stay is inserted and held in the skin material by projecting the stay upward, and the sewing machine thread of the injection port formed on the stay projecting surface side of the skin material is sewn around one end to the outside. Since the pad material is integrally foamed with tension applied to the end of the injection port and sealed, tension is applied to the end of the injection port of the skin material, and the pad material is folded inside the injection port at both ends of the injection port of the skin material. The both ends are urged outward on the extension of the injection port, and the sewing material thread sewn around the circumference to prevent the skin material from extending due to this bias, the injection port of the skin material is sealed in a uniform shape It is possible to obtain a skin material-integrated foam headrest which has no risk of leakage of the undiluted foaming liquid from the injection port, is excellent in airtightness, and does not have a possibility of causing meandering due to a difference in foaming pressure or causing appearance defects such as floating. it can.

According to a second aspect of the present invention, there is provided a foam molding method for a foam headrest integrated with a skin material, wherein a headrest frame and a stay connected to the headrest frame are inserted from an inlet of the skin material of the headrest, and a tip of the headrest stay is formed. With the side protruding outward from the stay insertion hole of the skin material and inserting and holding, place the skin material on the foaming mold,
In the foam molding method of a skin material integrated foam headrest formed by injecting a foaming undiluted solution from an injection hole formed in the skin material and integrally foaming the pad material, the injection port of the skin material of the headrest has an inner end. A sewing thread is sewn around the end of the injection port with the end of the injection port opened, and the stay is inserted and held by projecting the stay upward. In a state where the sewing machine thread of the injection port formed on the stay protruding surface side of the skin material is sewn one round, the end is pulled outward by a tension member, and the end of the injection port is sealed by applying tension thereto. Since the pad material is formed by integral foam molding, after the injection of the foaming undiluted solution, both ends folded inside the inlet at both ends of the inlet of the skin material are urged outward on an extension of the inlet, It is necessary to prevent the skin material from growing by this bias. Prevents sewn sewing thread, seals the inlet of the skin material in a uniform shape, there is no risk of leakage of the foaming liquid from the inlet, excellent sealing performance, meandering due to difference in foaming pressure, It is possible to obtain a foam molding method of a skin material-integrated foam headrest which does not cause appearance defects such as floating.

According to the present invention, there is no danger of leakage of the foaming liquid from the injection port while using the frame insertion port and the foaming liquid injection port, the sealing property is excellent, and the injection of the skin material is performed by the difference in the foaming pressure. It is possible to obtain a skin material-integrated foam headrest and a foam molding method thereof, in which there is no risk of meandering at the entrance or occurrence of poor appearance such as floating.

[Brief description of the drawings]

FIG. 1 is a perspective view of a skin material showing a skin material-integrated foam headrest and a foam molding method thereof according to the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1, showing an embodiment of the foam molding method of the skin material-integrated foam headrest according to the present invention.

FIG. 3 is a perspective view showing an embodiment of a skin material-integrated foam headrest according to the present invention, in which a sewing thread is sewn around the end of an inlet of the skin material.

FIG. 4 is a cross-sectional view of a skin material-integrated foam headrest according to the present invention.

FIG. 5 is a perspective view of a conventional skin material-integrated foam headrest.

FIGS. 6A and 6B show a conventional skin material-integrated foam headrest, in which FIG. 6A is a partial sectional view, and FIG.

[Explanation of symbols]

 Reference Signs List 11 skin material 11a stay protruding surface 11b insertion hole 11c insertion hole 12 headrest frame 12a vertical rod portion 12b central rod portion 13 pad material 15 frame insertion and injection port 15a end portion 15b end portion 17 sewing machine thread 21 tension member 23 sliding rod 23a Hook

Claims (2)

[Claims] 1. A headrest frame and a stay connected to the headrest frame are inserted from an inlet of a skin material of the headrest, and a tip end side of the headrest stay is projected outward from a stay insertion hole of the skin material to be inserted and held. In this state, a skin material is provided in a foaming mold, and a skin material integrated foam headrest formed by injecting a foaming undiluted solution from an injection port formed in the skin material and integrally foaming the pad material, The injection port of the skin material is formed by folding the ends inward, and a sewing thread is sewn along the edge of the injection port with the end of the injection port opened, and the skin material is sewn. A state in which the stay is inserted and held by projecting the stay upward, and the end where the sewing thread of the injection hole of the skin material is sewn around the circumference is pulled outward, tension is applied to the end of the injection hole, and the state is sealed. A foam headrest integrated with a skin material, wherein the pad material is integrally foamed. 2. A headrest frame and a stay connected to the headrest frame are inserted from an inlet of a skin material of the headrest, and a tip end side of the headrest stay projects outward from a stay insertion hole of the skin material to be inserted and held. In the foam molding method of the skin material integrated foam headrest formed by disposing a skin material in a foaming mold and injecting a foaming undiluted solution from an injection hole formed in the skin material to integrally foam the pad material in a state in which The injection port of the skin material of the headrest is formed such that its ends are folded back inward,
A sewing machine thread is sewn around the end of the injection port in a state where the end of the injection port is opened, and a stay is inserted and held by projecting a stay upward to the surface of the skin, and a stay protruding side of the surface of the skin is The pad material is integrally foam-molded in a state in which the sewing machine thread of the formed inlet is sewn around the circumference and pulled outward by a tension member, and tension is applied to the end of the inlet so as to be sealed. The foam molding method of the skin material integrated foam headrest.