JP5529693B2 - Fiber reinforced plastic parts - Google Patents

Description

  The present invention relates to fiber reinforced plastic parts, and more particularly to the placement of reinforcing fibers.

  Fiber reinforced plastics are widely used in various fields because of their advantages of light weight and high strength. As a method for producing a fiber reinforced plastic part, a method of laminating a sheet of woven fabric woven with reinforcing fibers or a sheet in which reinforcing fibers are aligned in one direction, impregnating with resin, and curing is known. For fiber-reinforced plastic parts, the arrangement of reinforcing fibers according to the shape of the part and the direction of the load is being studied. Japanese Patent Application Laid-Open No. H10-228667 discloses a technique related to the arrangement of reinforcing fibers around a hole in a fiber-reinforced plastic part having a hole.

JP 2008-290269 A

  In a fiber reinforced plastic part having a cylindrical portion having a slit in the longitudinal direction, there is a case where strength against a force for expanding the slit is required.

  An object of this invention is to provide the fiber reinforced plastic component which has the intensity | strength which resists the force which is going to open a slit.

  A fiber-reinforced plastic part according to the present invention includes a cylindrical portion having a slit extending in the longitudinal direction, a plate portion connected to a position of the cylindrical portion opposite to the slit and extending in the longitudinal direction, and a cylindrical portion It is a component that has a side plate portion that crosses the plate portion at a position adjacent to the portion and is arranged extending in the longitudinal direction. A first continuous layer of unidirectional material having reinforcing fibers extending in the circumferential direction on the first side surface, which is one side surface of the cylindrical portion with the plate portion as a boundary, and continuously extending away from the cylindrical portion in the plate portion; A second continuous layer of unidirectional material having reinforcing fibers extending in the circumferential direction on the second side opposite to the first side surface of the cylindrical portion and continuously extending in the direction away from the cylindrical portion in the plate portion; In the plate portion, the first and second continuous layers are bonded together. Furthermore, in the tube portion, the inner layer is located on the inner side of the first and second continuous layers and is continuous in the circumferential direction, and in the tube portion and the plate portion, the first outer layer is located outside the first continuous layer, A cylindrical portion and a plate portion, and a second outer layer located outside the second continuous layer. Further, the side plate portion includes a side core material that intersects and penetrates the plate portion, and an outer surface layer that extends from the portion laminated on the plate portion and is positioned with the side core material sandwiched between the front and back sides of the plate portion. .

  By arranging the side core material of the side plate portion so as to penetrate the plate portion, it is possible to resist the force of trying to widen the slit.

It is a perspective view which shows the external appearance of the fiber reinforced plastic component of this embodiment. It is explanatory drawing of the manufacturing process of the fiber reinforced plastic component of this embodiment. It is explanatory drawing of the manufacturing process of the fiber reinforced plastic component of this embodiment. It is explanatory drawing of the manufacturing process of the fiber reinforced plastic component of this embodiment. It is explanatory drawing of the manufacturing process of the fiber reinforced plastic component of this embodiment. It is explanatory drawing of the manufacturing process of the fiber reinforced plastic component of this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a fiber-reinforced plastic part 10 of the present embodiment. The component 10 has a cylindrical tube portion 14 that engages with a columnar, in particular in this embodiment a columnar rail 12. The cylinder part 14 has the slit 16 extended in the axial direction of the cylinder shape. The slit 16 extends over the entire length of the tube portion 14, and the cross-sectional shape of the tube portion 14 is substantially C-shaped. A plate-shaped plate portion 18 extending in the axial direction of the tube portion 14 is connected to a position of the tube portion 14 opposite to the portion where the slit 16 is provided. The plate portion 18 extends along a direction away from the cylindrical portion 14, particularly along a radial direction of the cylindrical shape. Further, in the axial direction of the cylindrical shape, it may have the same length as the entire length of the cylindrical portion 14. A side plate 20 is provided at a position adjacent to the tube portion 14 of the plate portion 18 so as to cross the plate portion and extend in the axial direction of the tube portion. In FIG. 1, the side plate 20 is shown in a partially broken state in order to show a cross section.

  The fiber reinforced plastic part 10 is slidable along the rail 12 in a state in which the cylindrical portion 14 accommodates the rail 12 in the space inside thereof. When a downward force in FIG. 1 is applied to the rail 12, a force for separating these portions is applied to the connection portion between the tube portion 14 and the plate portion 18. Further, a force in the direction of expanding the slit 16 also acts on the cylindrical portion 14.

  The component 10 includes two continuous layers 22 and 24 made of a unidirectional material in which the direction of the reinforcing fiber is unidirectional, which is continuous to these portions in order to resist the force of separating the cylindrical portion 14 and the plate portion 18. Have. One continuous layer (hereinafter referred to as a first continuous layer) 22 is arranged extending in the circumferential direction in the arc portion on the left side in the drawing from the position where the plate portion 18 is connected to the cylindrical portion 14, and The plate portion 18 is disposed along the surface formed by the plate portion. The other continuous layer (hereinafter referred to as a second continuous layer) 24 is arranged extending in the circumferential direction in the arc portion on the right side in the drawing from the position where the plate portion 18 is connected to the cylindrical portion 14. The plate portion 18 is disposed along the surface formed by the plate portion. The portions belonging to the plate portion 18 of the left and right continuous layers 22 and 24 are overlapped. The reinforcing fibers of the continuous layers 22 and 24 extend in the circumferential direction in the cylindrical portion 14 and extend outward in the direction away from the cylindrical portion 14 in the plate portion 18, in other words, in the radial direction of the cylindrical portion 14. . In addition, the reinforcing fibers belonging to the continuous layers 22 and 24 are continuous between the cylindrical portion 14 and the plate portion 18, and counteract the force for separating the cylindrical portion 14 and the plate portion 18 by the continuous reinforcing fibers.

  In the cylindrical portion 14, an inner layer 26 made of a woven fiber reinforced plastic (for example, carbon fiber reinforced plastic: CFRP) continuous in the circumferential direction is disposed inside the continuous layers 22 and 24. The inner layer 26 forms the inner wall surface of the cylindrical portion 14 and contacts the rail 12. Further, the inner layer 26 continuously connects the left and right portions of the cylindrical portion 14, and opposes the force for separating them. In the cylindrical portion 14 and the plate portion 18, a first outer layer 28 and a second outer layer 30 are disposed on the outer side of the first continuous layer 22 and the outer side of the second continuous layer 24, respectively. The first and second outer layers 28, 30 may be woven fiber reinforced plastic or unidirectional fiber reinforced plastic. The direction of the fibers is preferably a direction in which the strength increases in the same direction as the direction of the fibers of the first and second continuous layers 22 and 24.

  In the tubular portion 14, the first continuous layer 22 is sandwiched between the inner layer 26 and the first outer layer 28, and the second continuous layer 24 is sandwiched between the inner layer 26 and the second outer layer 30. In the plate portion 18, the superimposed first continuous layer 22 and second continuous layer 24 are sandwiched between the first outer layer 28 and the second outer layer 30.

  Inside the side plate 20, a side center member 42 that penetrates the plate portion 18 and extends to the left and right of the plate portion 18 is disposed. The side core member 42 has a rod shape or a thin plate shape, and a plurality of the side core members 42 are arranged in the extending direction of the cylindrical portion 14 with a space therebetween. Also, the side core material 42 can be a unidirectional fiber reinforced plastic. The side core material 42 opposes the force acting to widen the slit 16 and peel off the layer of the plate portion 18.

  2-6 is a figure explaining the manufacturing process of the fiber reinforced plastic component 10 of this embodiment. First, the fiber reinforced plastic (for example, carbon fiber reinforced plastic: CFRP) of the textile before hardening is wound around the cylindrical side surface of the mold 32 having the same cross-sectional shape as that of the rail 12 (particularly, a cylindrical shape in this example). This becomes the aforementioned inner layer 26 after curing. Here, also in the state before hardening, it demonstrates using the member name and code | symbol after hardening. As shown in FIG. 2, the inner layer 26 is wound around the mold 32 so that one of the circumferential layers (downward in the drawing) is opened, and this opening becomes the slit 16 after completion. In addition, either one of the longitudinal and lateral reinforcing fibers of the inner layer 26 that is a woven fabric is disposed so as to extend in the circumferential direction of the cylindrical side surface. When the vertical and horizontal strengths are different, it is preferable to dispose the woven fabric inner layer 26 so as to obtain a high strength in the circumferential direction.

  The first and second continuous layers 22 and 24 include a flat plate-shaped portion and a portion having a shape of a part of a cylinder. A portion having a shape of a part of a cylinder is referred to as a semi-cylindrical portion. Actually, however, the arc length is slightly shorter than that of the semi-cylinder in order to form the slit 16. The first and second continuous layers 22 and 24 connect the edges of the plate-shaped portion and the semi-cylindrical portion, and the plate-shaped portion is formed along the direction of one radius of the semi-cylindrical portion. And are preformed into a shape as shown in FIG. As described above, the first and second continuous layers 22 and 24 are made of a unidirectional material, and the reinforcing fibers are arranged in the direction indicated by the arrow Y in FIG. The plate-shaped portions are overlapped, and the aforementioned inner layer 26 is accommodated inside the semi-cylindrical portion. The arc length of the semi-cylindrical portion corresponds to the circumferential length of the inner layer 26 and is a length between the tip portions of the semi-cylindrical portions, and this portion later becomes the slit 16. In addition, holes 34 are formed in the plate-shaped portions of the first and second continuous layers 22 and 24 for allowing the side core material 42 that supports the side plate 20 to pass through.

  FIG. 4 shows a state in which the first continuous layer 22 and the second continuous layer 24 are stacked so as to accommodate the inner layer 26, and further, a woven or unidirectional fiber reinforced plastic is stacked on the outer side. . The layer superposed on the first continuous layer 22 is a first outer lower layer 36 that becomes a part of the first outer layer 28 described above. Further, the layer superimposed on the second continuous layer 24 is a second outer lower layer 38 that becomes a part of the second outer layer 30 described above. The first and second outer lower layers 36 and 38 are also provided with holes 40 at the same positions as the first and second continuous layers 22 and 24.

  Next, as shown in FIG. 5, in the holes 34 and 40 formed so as to penetrate through the plate-shaped portion where the first and second continuous layers and the first and second outer lower layers are laminated, The side core material 42 made of fiber-reinforced plastic, which is a unidirectional material cured by molding, is penetrated. Furthermore, as shown in FIG. 6, the outer surface layer is overlaid on the first and second outer lower layers 36 and 38. The outer surface layer has four parts, and first and second outer surface layers 44 and 46 are provided corresponding to the first outer lower layer 36, and third and fourth outer surface layers 48 corresponding to the second outer lower layer 38. , 50 are provided. The first outer surface layer 44 corresponds to the tube portion 14 and the portion of the plate portion 18 up to the side plate 20, and the second outer surface layer 46 is separated from the tube portion from the side plate 20 of the plate portion 18. Corresponds to the part. The first outer layer 28 is formed by these portions and the first outer lower layer 36. The third outer surface layer 48 corresponds to the cylindrical portion 14 and the portion of the plate portion 18 up to the side plate 20, and the fourth outer surface layer 50 is separated from the cylindrical portion from the side plate 20 of the plate portion 18. Corresponds to the part. The second outer layer 30 is formed by these portions and the second outer lower layer 38.

  Further, the first and second outer surface layers 44, 46 have a portion that becomes the side plate 20 with the side core material 42 sandwiched between portions on the left side of the plate portion in the drawing. Further, the third and fourth outer surface layers 48 and 50 also have a portion that becomes the side plate 20 with the side core material 42 interposed therebetween. As a result, the side core material 42 can receive a force to peel off the interlayer of the plate portion 18 and can counter this force. The first to fourth outer surface layers 44, 46, 48, 50 are preferably woven fiber reinforced plastic. These first to fourth outer surface layers are laminated and cured to form the fiber-reinforced plastic part shown in FIG.

  Since the reinforcing fibers of the first and second continuous layers 22 and 24 continuously extend into the semi-cylindrical portion and the plate-shaped portion, the strength against the force for separating the cylindrical portion 14 and the plate portion 18 is increased. Get higher. Further, the reinforcing fibers of the first and second outer lower layers 36 and 38 also extend continuously from the cylindrical portion 14 and the plate portion 18, thereby increasing the strength against separation. The side core material 42 is integrated with the first to fourth outer surface layers 44, 46, 48, and 50, so that the strength against the force for expanding the slit is increased.

  10 Fiber Reinforced Plastic Parts, 12 Rails, 14 Tubes, 16 Slits, 18 Plates, 20 Side Plates, 22, 24 Continuous Layers, 26 Inner Layers, 28, 30 Outer Layers, 32 Molds, 34 Holes, 36 1 outer lower layer, 38 second outer lower layer, 40 holes, 42 lateral core material, 44 first outer surface layer, 46 second outer surface layer, 48 third outer surface layer, 50 fourth outer surface layer.

Claims (1)

A cylinder part having a slit extending in the longitudinal direction, a plate part connected to a position opposite to the slit of the cylinder part and extending in the longitudinal direction, and a plate part at a position adjacent to the cylinder part. A side plate portion arranged extending in the longitudinal direction, and a fiber-reinforced plastic part having:
A first continuous unidirectional material having reinforcing fibers extending in the circumferential direction on the first side surface, which is one side surface of the cylindrical portion with the connection position of the plate portion as a boundary, and continuously extending away from the cylindrical portion in the plate portion. Layers,
A second continuous layer of unidirectional material having reinforcing fibers extending in the circumferential direction on the second side opposite to the first side surface of the cylindrical portion and continuously extending in the direction away from the cylindrical portion in the plate portion;
Including
In the plate portion, the first and second continuous layers are bonded together,
In the cylinder part,
An inner layer located inside the first and second continuous layers and continuous in the circumferential direction;
A first outer layer located outside the first continuous layer in the tube portion and the plate portion;
A second outer layer located outside the second continuous layer in the tube portion and the plate portion;
Including
In the side plate,
A side core material that intersects and penetrates the plate portion;
On the front and back of the plate portion, an outer surface layer that extends from the portion laminated to the plate portion and is positioned with the side core material sandwiched therebetween,
including,
Fiber reinforced plastic parts.

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