JP2014184901A - Reinforcement structure of resin molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure of a resin molding which inhibits stress from concentrating near an intersection part of first and second strip members for reinforcing a molding body and improves the reinforcement efficiency.SOLUTION: A reinforcement structure of a resin molding includes: a resin molding body 21; and first and second strip members 41, 42 which are disposed on at least one side surface of the molding body 21 intersecting with each other and reinforce the molding body 21. An intersection part of the first and second strip members 41, 42 are disposed so as to move relative to each other.

Description

  The present invention relates to a reinforcing structure for a resin molded product.

The resin molded product main body can be reduced in weight as compared with a metal one, but it may be difficult to ensure a desired strength.
For this reason, the resin which reinforces the resin-made molded product main body by disposing the reinforcing first and second belt-like members so as to cross each other on at least one side surface of the resin-made molded product main body. A reinforcing structure for a molded product has been proposed by the same applicant.
Also, as disclosed in Patent Document 1, it is known that a reinforced composite layer containing a polymer material impregnated with fibers is disposed on the front side of a side frame portion of a resin frame of a vehicle seat. Yes.

Special table 2010-500198

By the way, in the resin molded product in which the first and second band members for reinforcement are arranged so as to cross each other with respect to at least one side surface of the resin molded product main body, the intersection of the first and second band members Are joined to each other and a bending load is applied to the resin molded product. When the resin molded product is bent and deformed by this, the first and second belt-like members move at their intersections. Be regulated.
For this reason, it becomes difficult for the first and second belt-like members to move in the directions in which they are desired to be displaced from each other, stress concentrates in the vicinity of the intersection, and there is a risk of damage at that portion.

  In view of the above problems, an object of the present invention is to suppress stress concentration in the vicinity of the intersection of the first and second belt-shaped members that reinforce the molded product body, and to enhance the reinforcement efficiency. It is to provide a reinforcing structure for a resin molded product.

In order to solve the above-mentioned problem, the resin molded article reinforcing structure according to claim 1 of the present invention is arranged to intersect with each other with respect to at least one side surface of the molded article body and the molded article body, A resin molded article reinforcement structure comprising first and second belt-like members that reinforce the molded article body,
The first and second belt-like members are arranged such that their intersections are relatively movable.

According to the above configuration, when the resin molded product including the resin molded product main body and the first and second belt-like members is subjected to a bending load and the resin molded product is bent and deformed, the first and second The two belt-like members move relative to each other in a direction in which they are desired to be displaced in response to the bending deformation of the resin molded product without restricting the mutual movement at the intersection. That is, it bends in the bending direction of the resin molded product and takes stress.
For this reason, it can suppress that stress concentrates on the intersection part vicinity of a 1st, 2nd strip | belt-shaped member, and can prevent the damage in the intersection part vicinity.

The reinforcing structure of the resin molded product according to claim 2 is the reinforcing structure of the resin molded product according to claim 1,
The band-shaped member is formed of a reinforcing fiber tape.

  According to the said structure, the intensity | strength of the resin-made molded product main body can be raised further by forming a strip | belt-shaped member with a reinforced fiber tape.

The reinforcing structure of the resin molded product according to claim 3 is the reinforcing structure of the resin molded product according to claim 1 or 2,
The molded product body is a resin frame body of a vehicle seat.

  According to the said structure, it becomes possible to comprise the seat frame which is lightweight and excellent also in intensity | strength by employ | adopting the reinforcement structure of a resin molded product for the seat frame of the vehicle seat.

It is a perspective view which shows the seat frame of the vehicle seat as a reinforcement structure of the resin molded product which concerns on Example 1 of this invention. It is a perspective view which expands and shows a principal part similarly. It is sectional drawing which similarly shows the cross | intersection part of the 1st, 2nd reinforcing fiber tape which follows the III-III line of FIG. It is sectional drawing which shows the embodiment by which the release paper etc. which were rich in slidability were affixed on the cross | intersection part of the 1st, 2nd reinforcing fiber tape.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a seat back of a vehicle seat, for example, a seat frame 20 (resin molded product) forming a seat back skeleton of a rear seat includes a frame main body 21 and first and second reinforcements for the frame main body 21. 2 belt-like members 41 and 42.

  In the first embodiment, the frame body 21 is formed of a resin material mixed with reinforcing fibers. The frame body 21 includes a plate-like portion 21a having a substantially rectangular flat plate shape in front shape, a peripheral rib 22 protruding in an annular shape along a peripheral portion of one side surface (front surface) of the plate-like portion 21a, and a plate On the one side surface (front surface) of the shaped portion 21a, the protrusions 23 and 24 are projected at the same height as the peripheral rib 22 so as to intersect with each other in an approximately X shape, and each end portion is integrally connected to the peripheral rib 22; In the region between the ridges 23, 24 and the peripheral rib 22, a lattice rib 25 protruding in an oblique lattice shape at the same height as the peripheral rib 22 is integrally provided.

On the top surfaces of the ridges 23 and 24 of the frame body 21, first and second strip-shaped members 41 and 42 having a long strip shape are arranged so as to intersect in an X shape.
In the first embodiment, the first and second belt-like members 41 and 42 are formed by first and second reinforcing fiber tapes 51 and 52.
The first and second reinforcing fiber tapes 51 and 52 are formed of a reinforcing fiber tape such as carbon fiber, aramid fiber, glass fiber, or the like, for example, a unidirectional reinforcing fiber (carbon fiber) tape that may also be called a UD tape. The direction of the fibers is along (parallel) the longitudinal direction.

  Further, the first and second reinforcing fiber tapes 51 and 52 are arranged such that the crossing portions 55 are relatively movable. For example, as shown in FIG. 2 and FIG. 3, the lower second reinforcing fiber disposed in the longitudinal direction of the convex portion 24 at the intersecting portion 55 of the first and second reinforcing fiber tapes 51 and 52. The first reinforcing fiber tape 51 intersects and overlaps the upper side of the tape 52, and the first reinforcing fiber tape 51 and the second reinforcing fiber tape 52 are not bonded at the intersecting portion 55. As shown in FIG. 4, release tape 60 or the like having high slidability is attached to one of the tapes so as to be relatively movable.

In the first embodiment, the frame body 21 is molded with a reinforced fiber-mixed thermoplastic resin material (for example, PP, PA, etc.), and at the same time, the frame body 21 is long with respect to the top surfaces of the ridges 23 and 24 of the frame body 21. The first and second first and second reinforcing fiber tapes 51 and 52 in the shape of a strip are arranged in an X-shape so as to be integrally bonded, and the intersection 55 is bonded to each other. Are movably stacked.
A retractor 31 on which the seat belt 30 is wound so as to be drawable is mounted by appropriate mounting means such as a screw or a clip in the vicinity of the upper ends of the ridges 24 and the second reinforcing fiber tape 52 (see FIG. 1).

The reinforcing structure of the seat frame as the resin molded product according to the first embodiment is configured as described above.
Therefore, a bending load is applied to the seat frame 20 as a resin molded product including the resin frame main body 21 and the first and second reinforcing fiber tapes 51 and 52, and the seat frame 20 is bent and deformed. Sometimes, the first and second reinforcing fiber tapes 51 and 52 move relative to each other in a direction in which they want to be displaced in response to the flexural deformation of the seat frame 20 without the mutual movement being restricted at the intersection 55. To do. In other words, the first and second reinforcing fiber tapes 51 and 52 are bent in the bending direction of the seat frame 20 and respectively bear stress.
For this reason, it can suppress that stress concentrates on the intersection part 55 vicinity of the 1st, 2nd reinforcement fiber tapes 51 and 52, and can prevent the damage in the intersection part 55 vicinity.

  The first and second reinforcing fiber tapes 51 and 52 are reinforcing fiber tapes such as carbon fibers, aramid fibers, and glass fibers, for example, unidirectional reinforcing fiber (carbon fiber) tapes that may be called UD tapes. Thus, the strength of the resin frame main body 21 can be increased efficiently, and the seat frame 20 that is lightweight and excellent in strength can be configured.

  In addition, the frame main body 21 is formed of a reinforced fiber mixed thermoplastic resin material (for example, PP, PA, etc.), and at the same time, a long strip-shaped first, The second reinforcing fiber tapes 51 and 52 are integrally disposed so as to intersect in an X shape, and thereby the seat frame 20 can be configured. In this case, after forming the frame main body 21, the trouble of integrating the first and second reinforcing fiber tapes 51 and 52 with respect to the top surfaces of the ridges 23 and 24 of the frame main body 21 is eliminated. This is very effective in reducing costs.

In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form.
For example, in the first embodiment, the case of the seat frame 20 that forms the skeleton of the seat back of the vehicle seat (rear seat) is illustrated, but the seat frame that forms the skeleton of the seat cushion of the vehicle seat Also good.
Moreover, in the said Example 1, although the case where the elongate 1st, 2nd strip | belt-shaped members 41 and 42 are the 1st, 2nd reinforcement fiber tapes 51 and 52 was illustrated, other than a reinforcement fiber tape A strip-shaped member may be used.
Moreover, in the said Example 1, although the case where it was the reinforcement structure of the seat frame 20 of a vehicle seat was illustrated, it can also employ | adopt as a reinforcement structure of resin molded products other than the seat frame 20. FIG.

20 Seat frame (resin molded product)
DESCRIPTION OF SYMBOLS 21 Resin frame main body 41 1st strip | belt-shaped member 42 2nd strip | belt-shaped member 51 1st reinforcement fiber tape 52 2nd reinforcement fiber tape 55 Crossing part

Claims (3)

A resin molded product comprising: a resin molded product main body; and first and second belt-shaped members that are arranged to intersect with each other with respect to at least one side surface of the molded product main body and reinforce the molded product main body. A reinforcing structure,
The reinforcing structure of a resin molded product, wherein the first and second belt-like members are arranged so that their intersections are relatively movable. A reinforcing structure for a resin molded product according to claim 1,
The band-shaped member is formed of a reinforcing fiber tape, and is a reinforcing structure for a resin molded product. A reinforcing structure for a resin molded product according to claim 1 or 2,
A resin molded article reinforcing structure, wherein the molded article body is a resin frame body of a vehicle seat.

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