Frame structure for backrest and method for manufacturing same

Abstract

The present invention provides a resinous frame structure for a backrest and a method for manufacturing the same. The frame structure for the backrest has a configuration in which side frames that extend parallel to each other on both sides and a transverse frame that extends between the tops of both the side frames are integrally connected to form a gate shape as a whole, a belt-shaped FRP sheet in which reinforced fibers are oriented in one direction so as to stretch continuously or intermittently is stuck on the surface of at least the transverse frame between the side frames, and a matrix resin of the stuck FRP sheet and a resin constituting the transverse frame are integrally joined. The stiffness of the transverse frame that serves as a load receiving part and further forms a path for transmitting a load to the side frame side can be improved, and the whole frame structure can achieve high stiffness while ensuring light weight.

Description

technical field [0001] The present invention relates to a frame structure for a backrest and a manufacturing method thereof, and particularly relates to a frame structure for a backrest which is made of light resin but has high rigidity and is most suitable for use in an automobile seat, and a method for manufacturing the same. Background technique [0002] The frame structure for the backrest, especially the frame structure for the backrest of the vehicle, is desired to be lightweight in view of the requirement for reducing the overall weight of the vehicle, and it is required to withstand the load from the occupant when receiving a collision from the rear or side of the vehicle. To properly protect the occupant from the moment generated by such a large load, it is desirable that it is highly rigid. [0003] In the case where the frame structure is mainly made of metal, in order to satisfy the above-mentioned requirements, it becomes a relatively complicated structure (for ...

AI Technical Summary

Problems solved by technology

However, in the structures disclosed in Patent Documents 2, 3, and 4, substantially the entire main constituent parts of the frame structure are made of FRP, that is, reinforcing fibers are arranged inside the thick walls of the main constituent parts. structure, therefore, it is often difficult to arrange the reinforcing fibers in the proper position and shape

As FRP, especially in the structure using CFRP (carbon fiber reinforced plastic) disclosed in Patent Documents 2 and 3, since the cost of CFRP is high, a high cost is required in this structure using a very large amount of CFRP

In addition, in order to provide a specific part of the frame structure described in Patent Document 2 with high rigidity, a concavo-convex structure or a plurality of ribs is provided, so this part has a relatively complicated shape, and it is relatively difficult to form in terms of making the whole into an integrated structure. difficult structure

As a result, there is room for improvement in terms of cheaper and easier manufacture of lightweight and highly rigid frame structures for backrests

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