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Vehicle seat and method of manufacturing headrest

A manufacturing method and vehicle technology, which can be applied to vehicle seats, special positions of vehicles, headrests, etc., can solve the problems of time required and insufficient polyurethane filling, and achieve the effect of uniform filling

Active Publication Date: 2019-07-23
TACHI S CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in Patent Document 1, when the gap between the outer surface of the molded foam and the inner surface of the skin member is narrow, if there is no member that expands the gap generated by the swinging head support plate, etc. It takes time for the foam material to reach the lower side, and the filling of polyurethane (cushion material) at the lower side may be insufficient
[0008] In addition, if the foaming raw material injection path is formed straight in the vertical direction as in Patent Document 1, if the position of the upper end of the foaming raw material injection path deviates from the position of the top of the headrest, the foaming raw material reaches the opposite position. It takes time for the upper end of the injection path of the foaming material to be opposite to the top, and the filling of polyurethane may be insufficient

Method used

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  • Vehicle seat and method of manufacturing headrest
  • Vehicle seat and method of manufacturing headrest
  • Vehicle seat and method of manufacturing headrest

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0052] (vehicle seat)

[0053] use figure 1 The vehicle seat of the first embodiment will be described. figure 1It is a perspective view showing the vehicle seat of the first embodiment. The vehicle seat 1 shown here is, for example, one of a plurality of seats provided inside an automobile which is one type of vehicle.

[0054] The vehicle seat 1 includes a seat cushion 2 as a portion on which an occupant sits, a seat back 3 erected at the rear end of the seat cushion 2 , and a headrest 4 attached to the upper end of the seat back 3 .

[0055] The seat cushion 2 is attached to the floor of the vehicle, and may have a mechanism capable of adjusting its position in the front-rear direction or in a height-adjustable state.

[0056] The seat back 3 is a portion constituting the back, and is connected to the seat cushion 2 in a rotatable state about a rotation shaft (not shown) provided at the lower end. That is, the vehicle seat 1 is provided with a reclining function for inc...

Deformed example 1-1

[0077] In the first embodiment, the injection path has a curved portion, but any structure may be used as long as the foaming raw material is stirred. In Modification 1-1, the injection path has a stirring rod instead of a bent portion. use Figure 7 8. The headrest of Modification 1-1 will be described. Figure 7 It is a schematic sectional view showing the headrest of Modification 1-1, and is a view showing a state where the injection nozzle is inserted. Figure 8 is Figure 7 The plan view of the injection path, Fig. 8 (A) is the figure under the situation that has many stirring rods, Fig. 8 (B) is the figure under the situation that has one stirring rod.

[0078]Similar to Comparative Example 1-1, in the headrest 4A of Modification 1-1, the injection path 61A linearly extends upward from the lower end of the core material 6A to reach the upper end. A stirring rod 62A for foaming raw material is provided at the center portion (predetermined position) in the up-down direc...

Deformed example 1-2

[0082] Next, use Figure 9 An example (Modification 1-2) in which the structure of the injection nozzle is different from the embodiment will be described. Figure 9 It is a schematic cross-sectional view showing a headrest according to Modification 1-2, and is a view showing a state where an injection nozzle is inserted.

[0083] The headrest 4B of the modified example 1-2 is provided with the core material 6B which has the linear injection path 61B similar to the comparative example 1-1. On the other hand, the injection nozzle 22B of Modification 1-2 has a hole ejected in the extending direction of the injection path 61B and a hole ejected in the front-rear direction of the headrest at a position not inserted into the injection path 61B, and three direction to spray the foaming material. By using the injection nozzle 22B, similarly to the embodiment, the foaming raw material can be simultaneously filled into the A part and the B part. However, it is necessary to set (make...

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Abstract

The invention provides a vehicle seat and a method of manufacturing a headrest, which comprises a one-piece foam-formed buffer material for preparing the surface of the headrest and is evenly filled.A vehicle seat includes a headrest, a seat back to which the headrest is attached, and a seat cushion connected to the seat back. The headrest includes pillar frames attached to the seat back, a coremember that includes a pouring passage penetrating from one end to the other end, a cover that covers the core member and a part of the pillar frames, and a cushion member that is formed in a gap between the outer surface of the core member and the inner surface of the cover and inside the pouring passage. The pouring passage extends in a first direction from the one end of the core member to reach a predetermined position, extends in a second direction from the predetermined position to reach the other end, and includes a bent part at the predetermined position.

Description

technical field [0001] The present invention relates to a vehicle seat, and is applicable, for example, to a vehicle seat provided with a headrest whose skin is integrally foam-molded. Background technique [0002] In recent years, for example, the following headrests have been demanded: a mechanism (shock absorbing member) for reducing the thickness of the cushion layer for weight reduction, a mechanism for adjusting the front and rear positions of the headrest (position adjustment mechanism), a speaker, etc. An acoustic mechanism (acoustic mechanism) and the like are inserted into the skin member. In such a case, if the cushion layer and the skin member are to be foamed integrally, these mechanisms will hinder the foaming action of the polyurethane foam raw material, and uniform foaming cannot be performed, and there is a problem of easy occurrence of material shortage due to gas retention and the like. Problem (Specification of International Publication No. 2016 / 117687 (...

Claims

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Application Information

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IPC IPC(8): B29C44/18B29C44/42B29C44/34B60N2/62B60N2/64B60N2/80
CPCB29C44/182B29C44/3442B29C44/42B60N2/62B60N2/64B60N2/80B29C44/1276B29C44/14B29C44/40B29K2075/00B29L2031/3023B60N2/7017B29C44/1228B29C44/1271B29C44/18B29C44/353B60N2/809B60N2/879B60N2/882B60N2002/899
Inventor 田畑毅
Owner TACHI S CO LTD