JP2017125600A - Spring structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber-reinforced plastic spring structure which is a fiber-reinforced plastic spring structure suitable for a softening measurement of shock and vibration related to an architectural structure/vehicle/conveyance, and having an uncomplicated shape so as to facilitate molding processing, and is excellent in durability and light-weight/compact, and includes various applicabilities in the application field.SOLUTION: In a fiber-reinforced plastic spring structure, the fiber-reinforced plastic spring structure is constituted of a fiber-reinforced plastic oval ring-shaped material, and the oval ring-shaped material unit comprises a continuous smooth curved surface shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fiber reinforced plastic spring structure that is lightweight, compact and has excellent durability and various applicability as a countermeasure for mitigating impacts and vibrations related to buildings, vehicles, transported goods, and the like.

  Conventionally, a spring material having a specific structure made of metal or fiber reinforced resin has been used as a general mechanical element technique for mitigating shock and vibration.

  For example, a fiber-reinforced plastic spring to which a single-side bending load that enables prevention of breakage due to compressive stress is applied has been proposed for the automotive field where weight reduction and space saving are required (Patent Document 1).

  In addition, a specific structure has been proposed as a leaf spring for a railway vehicle bogie that is made of a laminate of a fiber reinforced plastic member and a core core member, and that is lightweight, reduces cost, and improves durability (Patent Document 2).

  Furthermore, as a measure to mitigate shocks and vibrations of vehicles and cargo, etc., a spherical suspension is proposed, which is a structure made of metal such as steel or stainless steel, in which a plurality of elongated elastic pieces are fixed to each pole in an arc shape. (Patent Document 3).

  And in the industrial field | area with a high need of a vibration isolating and vibration isolating spring, the specific shape carbon fiber reinforced resin annular spring which has the flat connection part which is easy to attach with other components is proposed (patent document 4).

JP2011-241845 International Publication Number WO20131 / 038673 International Publication Number WO2011-125488 Utility Model Registration No. 3183939

However, in the above-mentioned prior art, since Patent Document 1 is a cantilever plate-like spring that is asymmetric with respect to the neutral axis, the shock resistance that is symmetric with respect to the neutral axis, in particular, except for specific applications in the automotive field, etc. It could not be applied to application fields that require vibration resistance and vibration damping functions. The case of Patent Document 2 is also a leaf spring for a large and heavy railway vehicle bogie, which is inappropriate for mitigating the impact and vibration of small and light objects.
In addition, since Patent Document 3 is a spherical body formed by combining long metal pieces that are not continuous as a whole, the production efficiency is low and the cost is increased in a complicated manufacturing process, and the load stress is difficult to disperse in a well-balanced manner. Furthermore, it is not suitable for applications that require light weight and compactness. Patent Document 4 has an object of facilitating attachment with other components, and has a flat connection portion in the annular spring, so that this portion is formed in order to form a bent portion at the boundary between the curved surface and the flat surface. Therefore, it is necessary to improve the load stress so that it can be easily distributed in a well-balanced manner.

  The present invention is made of fiber-reinforced plastic that can be made lighter and more compact. It enables mass production and low cost by enabling easy molding without complicated shapes, and measures to reduce shock and vibration. An object of the present invention is to provide a spring structure having both excellent durability and various applicability.

In order to solve the above problems, the present invention adopts the following configuration.
(1) The spring structure is composed of an elliptical annular body made of fiber reinforced plastic, and the elliptical annular body itself has a continuous smooth curved surface shape.
(2) The above-mentioned fiber-reinforced plastic oval ring itself has a width of 2 mm to 200 mm, a thickness of 0.1 mm to 15 mm, and a major axis diameter on the outer surface of 1.2 to 6 times the minor axis diameter. The spring structure according to (1).
(3) The spring structure according to any one of (1) to (2), wherein the fiber-reinforced plastic elliptical annular body is made of carbon fiber-reinforced plastic.
(4) The spring structure according to any one of (1) to (3), wherein a damping functional device is incorporated and fixed on the inner side surface of the fiber-reinforced plastic elliptical annular body.
(5) Any one of (1) to (4), wherein a plurality of the above-mentioned elliptical annular bodies made of fiber reinforced plastic are composed of a plurality, and the side contact portions of the elliptical annular bodies are overlapped and fixed to each other. The spring structure described.
(6) A seismic isolation unit using a plurality of the spring structures according to any one of (1) to (3) described above and being assembled and fixed between flat plate shapes having high rigidity.
(7) A seismic isolation unit using a plurality of the spring structures described in (4) above and being assembled and fixed between flat plate shapes having high rigidity.
(8) A seismic isolation unit using a plurality of the spring structures described in (5) above and being assembled and fixed between flat plate shapes having high rigidity.
(9) A plurality of the spring structures according to any one of the above (1) to (3) and a plurality of the damping functional devices are used together, and they are assembled and fixed between flat plate shapes having high rigidity. A seismic isolation unit.
(10) A plurality of the spring structures according to any one of (1) to (3) above and a plurality of the spring structures according to (4) above are used in combination, and a flat plate shape with high rigidity is used. A seismic isolation unit built in between and fixed.
(11) A plurality of the spring structures according to any one of (1) to (3) and a plurality of the spring structures according to (5) above are used in combination, and a flat plate shape with high rigidity is used. A seismic isolation unit built in between and fixed.

  As described above, the spring structure of the present invention is composed of a continuous smooth curved fiber-reinforced plastic elliptical annular body that is not complex, so that it is lightweight and compact, and is advantageous in mass production and cost reduction. Become. Furthermore, the load stress tends to be dispersed in a well-balanced manner, leading to improved durability. In addition, by combining a plurality of damping functional devices and a plurality of the elliptical annular bodies alone, various applicability can be applied to shock and vibration mitigation measures.

Hereinafter, the fiber-reinforced plastic ellipsoidal simple substance according to the present invention is abbreviated as “elliptical ring”.
(A) Front, (b) Side, (c) Whole of “Ellipsoidal ring”. The whole structure of a spring structure consisting of an "elliptical annular body" and a damping function device. “Elliptical annular body” is a plurality of spring structures, and (a) a combination of two, (b) and (c) a total of three combinations. These are (a) plane, (b) front, and (c) side of a spring structure combining five “elliptical annular bodies”. (A) and (b) side surface of the seismic isolation unit, (c) the whole picture.

  Hereinafter, the fiber-reinforced plastic elliptical simple substance according to the present invention is abbreviated as “elliptical annular body”, and an embodiment of the present invention will be described with reference to the drawings.

  1 (a), (b), (c), and (d) are “elliptical annular bodies” that constitute the spring structure of the present invention, and are characterized by a generally continuous smooth curved surface shape. is there. By adopting an “elliptical annular body” having a specific shape that is not a complicated shape, molding is facilitated, and mass production and cost reduction can be advantageously performed. Moreover, since it is a curved surface shape without a bending part, it becomes the direction where load stress becomes easy to disperse | distribute with sufficient balance, and leads to the durable improvement which this invention aims at.

Next, the basic elements of the “elliptical annular body” constituting the spring structure will be specifically described. The shape size of the “elliptical annular body” is determined according to the required characteristics for the load stress of each application, but preferably the width is 2 mm to 200 mm, the thickness is 0.1 mm to 15 mm, and the outer surface is The major axis diameter is 1.2 to 6 times the minor axis diameter.
More preferably, the width is 4 mm to 150 mm, the thickness is 0.2 mm to 10 mm, and the major axis diameter on the outer surface is 1.4 to 4 times the minor axis diameter.
Here, if the width is 2 mm or less, it is too narrow to make it difficult to maintain the strength performance of the spring structure, and if it is 200 mm or more, it is too wide to make the spring structure difficult to bend and cushion performance is difficult to maintain.
Further, when the thickness is 0.1 mm or less, it is too thin and weak and it is difficult to maintain the strength performance of the spring structure. When the thickness is 15 mm or more, it is too thick and the spring structure is difficult to bend and it is difficult to maintain the cushion performance. Absent.
In addition, when the major axis diameter on the outer surface is 1.2 times or less of the minor axis diameter, it becomes a curved shape close to an annular shape, so the vertical direction of the spring structure is too long and difficult to install in a narrow place, Since it becomes difficult to bend, the cushion performance is insufficient. And if it becomes 6 times or more, the elliptical annular shape is flat and narrow, which is not preferable because the bending width is narrow and the resilience to load stress is poor, and it becomes difficult to maintain the cushion performance.

Regarding the raw material of the “elliptical annular body”, the fiber reinforced plastic type is appropriately selected from the combination of the reinforced fiber type and the plastic type according to the required characteristics of each application.
Examples of the reinforcing fiber type include carbon fiber, glass fiber, aramid fiber, high-strength polyethylene fiber, and the like, and these can be used alone or in combination. Furthermore, it may be any shape such as cloth, cloth, mat, strand, etc., such as plain weave, satin weave, twill weave, weave weave, etc. Is preferably used.
Among these, carbon fibers having high strength and elastic modulus are effective for securing the high performance and high function of the spring structure in the present invention, and can be used more preferably.
The carbon fiber may be of any type such as polyacrylonitrile, rayon, lignin, pitch, etc., but polyacrylonitrile carbon fiber having an excellent balance between strength and elastic modulus is more preferable.
Next, examples of plastics include thermosetting resins such as ordinary epoxy, unsaturated polyester, phenol, vinyl ester, and polyimide, and thermoplastic resins such as polyamide, polyester, polyolefin, ABS, and polyetheretherketone. it can. Among these, the thermosetting resin satisfies the required characteristics of the spring structure in the present invention, and an epoxy resin advantageous in terms of moldability and cost can be used more preferably.

In addition, regarding the molding method of the “elliptical annular body”, in addition to a normal autoclave method, a sheet winding method, a vacuum back method, an internal pressure molding method, a resin transfer (RTM) method or the like can be molded alone or in combination, An autoclave method that is advantageous in terms of formability and appearance quality is preferred.
Among these, as an example of the “elliptical annular body” molding process in the autoclave method, an elliptical annular mold (major axis diameter: 110 mm, minor axis diameter: 55 mm, manufactured according to the specification design and required characteristics of each application) Width: 20mm), a woven base material impregnated with a plastic fiber to be used and an intermediate material of a prepreg sheet aligned in one direction are laminated with the same direction or different directions so that the design thickness is 2 mm Then, the whole was set in an autoclave (manufactured by Hanyuda Works, DL-2010), treated under the conditions of heating 130 ° C., pressurization 0.3 MPa, and time 2 hours, and then the target “elliptical ring shape” Body "molded product (width: 20 mm, thickness 2 mm, major axis outer diameter: 112 mm, minor axis outer diameter: 57 mm, ratio of major axis outer diameter / minor axis outer diameter: 1.96 times).
Next, when the side part of the major axis diameter in this “elliptical annular body” molded product is set up and down, the lower part is placed on the floor, and when a load of 100 kgf is applied from above, the minor axis diameter direction is compressed by about 10 mm and deformed. However, since it returned to its original shape as soon as the load of 100 kgf was removed, it was confirmed that it can be basically used as a spring application.
In addition, the “elliptical annular body” molded product obtained by the molding process as described above can be easily molded by ordinary means such as finishing by adding a cutting process if necessary. In the case where only the difference is made, a method of forming a long “elliptical annular body” and then cutting it into a predetermined size leads to an increase in production efficiency, which is effective for cost reduction.
In addition, in order to improve weather resistance, appearance quality and design, paint such as phenol resin paint, epoxy resin paint, polyurethane resin paint, silicon resin paint, acrylic resin paint, fluororesin paint on the surface of the "elliptical ring" A gel coat layer such as a layer or an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, or a polyester resin may be formed.

  Next, in the present invention, an “elliptical annular body” is used as a basic skeleton, and for example, by incorporating means for attenuating an attenuation function device or using a means for fixing a plurality of “elliptical annular bodies” in combination. It is possible to realize various applicability for shock and vibration mitigation measures. Here, as the above-described attenuation function device, a commercially available product having a normal damper function can be used as long as it is a standard product that can be adapted to the specification design for each application. The fixing means may be a normal method such as a bolt nut, rivet, adhesive, or bundling.

Hereinafter, specific embodiments of the spring structure according to the present invention will be described with reference to the drawings.
FIG. 2 shows the entire structure of an example spring structure in which a damping functional device is assembled and fixed on the inner surface of an “elliptical annular body”, and the overall capacity and size correspond to the required characteristics for load stress of each application. It can be decided freely based on the specification design.

  FIG. 3 is an example of a spring structure in which a plurality of “elliptical annular bodies” are stacked and fixed to each other. (A) The whole of the “elliptical ring” combined with two intersecting shapes, (b) The whole of the “elliptical ring” combined with three, and (c) The three outer surfaces of “elliptical ring” It is the whole combination of joints. There are a variety of combinations of these, including the overall capability and size, and it is a strength because it can be determined according to the required characteristics, installation space, design, etc. for each application.

  4A, 4B, and 4C are examples of a spring structure that is designed by combining five “elliptical annular bodies” so as not to protrude from the annular inner surface width. This example can also be used in a variety of ways, but it can be applied especially when the installation space is small or a special design is required.

FIGS. 5A, 5B, and 5C are examples of seismic isolation units in which two of each of the “elliptical annular body” and the damping function device are assembled and fixed between flat plate shapes having high rigidity.
As the flat plate shape type with high rigidity used here, ordinary materials such as metal, wood, plastic, etc. can be applied, but fiber reinforced plastic is particularly preferable, and carbon that can be reduced in weight and size is particularly preferable. More preferably, it is made of fiber reinforced plastic.
This seismic isolation unit is constructed based on the elemental technology of the spring structure in the present invention, and in the same way as in the above example, an “elliptical annular body” and a damping function device are arranged in accordance with the specification design for each application. it can. Furthermore, it is a strength that can be widely applied to shock and vibration mitigation measures with large object size and load stress.For example, it is easy to handle without requiring a large scale scale for a single seismic isolation unit. It is also possible to use a plurality of medium-sized single items side by side, which is an effective means.

  The fiber reinforced plastic spring structure and seismic isolation unit of the present invention can be applied to a wide range of objects from small scales to large scales as a measure for shock and vibration mitigation and seismic isolation systems in buildings, vehicles, transported objects, etc. And is useful for a wide range of applications.

1: Fiber-reinforced plastic elliptical ring simple substance 2: Outer surface of fiber-reinforced plastic elliptical ring simple substance 3: Inner side face of fiber-reinforced plastic elliptical circular ring simple substance 4: Damping function device 5: Flat plate shape material 6: Fixed Site A: Thickness of the fiber-reinforced plastic elliptical annular body B: Width of the fiber-reinforced plastic elliptical annular body C: Major axis diameter D of the outer surface of the fiber-reinforced plastic elliptical annular body D: Fiber-reinforced plastic elliptical annular body The short axis diameter of the single unit outer surface

Claims (11)

  The spring structure is composed of an elliptical annular body made of fiber reinforced plastic, and the elliptical annular body itself has a continuous smooth curved surface shape.   The fiber-reinforced plastic ellipsoidal simple substance has a width of 2 mm to 200 mm, a thickness of 0.1 mm to 15 mm, and a major axis diameter on the outer surface of 1.2 to 6 times the minor axis diameter. 2. The spring structure according to 1.   The spring structure according to claim 1, wherein the fiber-reinforced plastic elliptical annular body is made of carbon fiber-reinforced plastic.   The spring structure according to any one of claims 1 to 3, wherein a damping functional device is assembled and fixed to an inner surface of the fiber-reinforced plastic elliptical annular body.   The spring structure according to any one of claims 1 to 4, wherein a plurality of the fiber-reinforced plastic elliptical annular bodies are composed of a plurality of pieces, and the side contact portions of the elliptical annular bodies are overlapped and fixed to each other. .   A seismic isolation unit comprising a plurality of spring structures according to any one of claims 1 to 3 and being assembled and fixed between flat plate shapes having high rigidity.   A seismic isolation unit comprising a plurality of spring structures according to claim 4 and being assembled and fixed between flat plate shapes having high rigidity.   A seismic isolation unit comprising a plurality of spring structures according to claim 5 and being assembled and fixed between flat plate shapes having high rigidity.   A seismic isolation unit comprising a plurality of spring structures according to any one of claims 1 to 3 and a plurality of damping functional devices in combination and fixed between flat plate shapes having high rigidity.   A plurality of the spring structures according to any one of claims 1 to 3 and a plurality of the spring structures according to claim 4 are used in combination and fixed between flat plate shapes having high rigidity. Seismic isolation unit.   A plurality of the spring structures according to any one of claims 1 to 3 and a plurality of the spring structures according to claim 5 are used in combination and fixed between flat plate shapes having high rigidity. Seismic isolation unit.