JPH1178994A - Panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel provided with light-weight, high rigidity, and weather-durability, and capable of suspending an article, particularly a panel for truck cargo chamber floor by forming a projected part having a mounting strength enough to suspend it on the surface of an FRP plate with a core material having a specific tensile strength or modulus of elasticity. SOLUTION: A material having a tensile strength of 5 kg/mm<2> or higher or an elasticity modulus of 250 kgf/mm<2> or higher is used as a core material 1, and metals and ceramics are cited. For metals, a steel of which adhesiveness with FRP is excellent is used. On the other hand, FRP plates 3a and 3b are formed in a platy shape made of fiber-reinforced resin and each FRP member for truck cargo compartment is formed using a hand-lay up method. Also a projected part 2 of 15 to 150 mm in height and 2 to 20 mm in thickness having a mounting strength enough to suspend it on the surface of the FRP plate 3a by the core material 1 is formed on each panel. In addition, the core material 1 is favorable if a bearing strength is 20 kgf/mm<2> or higher in the range of pin diameter of 4 to 16 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel on which articles can be suspended, and more particularly to a panel for a truck cargo hold floor.

[0002]

2. Description of the Related Art A panel for a large structure requiring strength and light weight, particularly, a structure of a cargo compartment of a truck is provided with a floor panel based on an aggregate formed of a metal frame on a body chassis. , In addition to attaching the front and rear frame materials formed in a gate shape on the floor panel,
A so-called wing-structure cargo compartment is used in which the front and rear frames are connected at the center, and the left and right side walls and the ceiling of the cargo compartment can be flipped up and rotated.

[0003] As a result, cargo can be put in and out of the cargo compartment not only from behind the cargo compartment, but also from the left and right.
Workability is improved.

[0004]

Recently, wing trucks having a total weight of 25 tons (load capacity of about 13 tons) are becoming widespread as trucks are becoming larger.

[0005] Naturally, the load capacity is expected to be improved in order to reduce the transportation cost. However, in the case of the conventional mounting using a metal material, the mounting weight of the cargo compartment is increased, and the loading capacity is limited. . In addition, the conventional cargo compartment mounting member has many hollow portions and is weak against external force, and it is necessary to increase the strength of each part in order to be able to open and close, resulting in an increase in material thickness,
There is a problem that the weight is increased and the weight of the body is increased. Steel and aluminum materials have problems in weather resistance and corrosion resistance.

[0006] As another problem, since one cargo hold is composed of a large number of members, a large amount of cost is required for processing and assembling, and there is a problem of an increase in the mounting cost.

[0007] Under such circumstances, recently, a part of the vehicle has been mounted using fiber reinforced plastic (hereinafter abbreviated as FRP). Japanese Patent Laying-Open No. 4-166416 proposes a wing panel for a truck bed. This is a wing panel for a truck carrier, wherein the wing panel has a bent shape of a San Germanium panel structure in which a block-shaped core material of balsa material is sandwiched by a protective layer of FRP, and a peripheral portion is held by a channel member. belongs to.

However, since the present invention also uses a balsa material as the core material, the effect of reducing the weight is small, and a step of connecting the molded body to the mold material at the peripheral portion by a rivet or the like is required, which increases the mounting cost. Will be.

Another problem is that simply replacing the conventional cargo compartment for metal wing trucks with FRP material does not provide sufficient strength and rigidity, and cannot withstand the load of the load. The effect of light weight reduction cannot be exhibited.

It is also necessary to consider the structure of the connection portion and the mounting portion of the bodywork.

In this situation, an object of the present invention is to provide a cargo compartment for trucks which is lightweight, has sufficient strength, weather resistance and corrosion resistance, and is excellent in workability and assembly.

The FRP panel has been required to have various functions and structures in addition to a mere flat plate. For example, there has been an increasing demand for suspending various things on FRP panels. This is especially true for truck floor panels.
It is urgent. Under the floor of the truck, it is necessary to suspend various units such as a power unit for starting the wing panel, a side guard for preventing entanglement, and a chain hook. F
In RP truck cargo bays, vertical and horizontal joists (or stiffeners) are provided at the lower part of the floor in order to obtain rigidity and the like, and through holes and the like are provided in the horizontal joists and used for such suspension. However, in the case of floors where the horizontal joists are omitted from the problem of formability, it has been required to devise a separate suspension structure.

[0013]

The object of the present invention is basically achieved by the following constitution. That, characterized in that the surface of the FRP plate, the raised portion having a mounting strength that can be suspended is formed by the "tensile strength 5 kgf / mm ² or more or modulus 250 kgf / mm ² or more core material Panel. "

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIG. 1, but is not limited thereto. For example, a core material and an auxiliary material are not essential, and a core material is also limited to a T-shape. It is not something to be done.

The core material (1) according to the present invention has a material property of a tensile strength of 5 kgf / mm ² or more or an elastic modulus of 250 kgf / m 2.
it is necessary to have m ² or more. Preferably, tensile strength
10 kgf / mm ² or more or elastic modulus 500 kgf / mm ² or more. If the tensile strength is less than 5 kgf / mm ² , the mounting strength is insufficient and it is not preferable, and if the elastic modulus is less than 250 kgf / mm ² , the ratio of the load applied to the core decreases, and a high load is applied to the FRP covering the core. Is not preferred. The material is preferably a metal or a ceramic. In the case of a metal, steel is preferred because of good adhesion to FRP.

The FRP plate (3a, 3b) of the present invention is a plate made of fiber reinforced resin (FRP). As the reinforcing fiber of the FRP, it is preferable to use a carbon fiber cloth, mat, or strand, or a glass fiber cloth, mat, or roving alone or in combination. In particular, the use of carbon fiber is preferred for maximizing the weight reduction effect. Also, if you place a carbon fiber cloth on the surface,
The design of the surface is enhanced, which is more preferable.

As the FRP resin, a thermosetting resin such as epoxy, unsaturated polyester, phenol, and vinyl ester is preferable in terms of moldability and cost.

Each of the FRP members of these truck cargo compartments can be formed by using a forming method such as a hand lay-up method, a sheet winding method, a vacuum back method, a pressing method, and an RTM method alone or in combination. it can.

In the panel of the present invention, the core material has on the surface of the FRP plate a projection (2) having a mounting strength capable of being suspended. In this case, it is preferable that the core material is substantially covered with the FRP and not exposed, except for a through hole for attachment. Because FRP
By covering the core material, corrosion and cracking of the core material can be prevented, and strength and rigidity can be reinforced. The thickness of the FRP skin material covering the core material is 0.6 to 7.0.
mm is preferred. If it is 0.6 mm or less, strength and rigidity are insufficient. If the thickness is 7.0 mm or more, sufficient strength and rigidity can be obtained, but the over specification is required, and the cost increases as the weight increases.

The mounting strength at which the suspension can be suspended means that the core material is FRP even when a heavy object is mounted on the projection and suspended.
It means that it has sufficient strength so as not to be peeled off, the core material or the FRP is broken, and the core material or the panel is not deformed. Specifically, the core material has the material strength as described above.

The shape of the protruding portion is not particularly limited as long as it can be suspended, but the height is 15 mm to 150 m.
m, a thickness of 2 mm to 20 mm, and a width of 15 mm or more are preferable. It is preferable to form a through-hole in the thickness direction and tighten and fix the through-hole with a through-bolt and a nut. However, if necessary, a female screw can be formed as a bolt hole. In consideration of bolting, it is preferable that the compressive strength of the projection is 10 kgf / mm ² or more. Further, it is preferable that the core material has a bearing strength of 20 kgf / mm ² or more when the pin diameter is in the range of 4 to 16 mm. Further, it is preferable that the straight line in the height direction of the protruding portion is substantially parallel to the radiation of the panel plane. In other words, it is preferable that the protruding portions rise substantially vertically to the panel. If the deviation is less than 5 degrees, there is no problem in practical use, and it is practically horizontal (vertical)
Can be considered as

It is preferable that the core has a partial structure that is horizontal to the FRP plate, since the mounting strength is enhanced.
As the shape, it is preferable that the cross section has a shape like the letter “T” of the alphabet. In this case, the T-shaped horizontal portion corresponds to the horizontal partial structure of the core material. In the T-shaped cross section, the length from one end to the other end of the horizontal part is 20 mm ~
Preferably it is 200 mm. Alternatively, the ratio is preferably 1/5 to 1/1 with respect to the length of the vertical portion. The thickness is
1 mm to 20 mm is preferred. In consideration of the purpose of suspension, the projection is generally provided on only one surface of the panel, but may be provided on both surfaces if necessary.

As shown in FIG. 2, in addition to the T-shape, the ± -shape (1b) has a surface in contact with the inner surface of the FRP plate having the protruding portion, as shown in FIG. , More strength. Alternatively, I-shaped (1c) or J-shaped (1
As shown in d), the part protruding from the surface of the core FRP plate is
In some cases, it is convenient only to suspend the vehicle if it has a portion parallel to the FRP plate. Further, since it is difficult to manufacture a T-shaped cross section and an I-shaped cross section, they can be easily formed by a cross section (1e) having an L shape and a cross section (1f) having a U shape. Furthermore, an L-shape alone can be used.

The panel of the present invention is basically made of an FRP plate, but may have other materials and structures. For example, a sandwich structure in which FRP plates are arranged on both surfaces of a core material described later is preferable in that both lightweight and high rigidity of the panel can be achieved.

The core material (4) is preferably a foam. As the material of the foam used, polyurethane,
Polystyrene, polyethylene, polypropylene, PV
C, silicon or the like is used, and its specific gravity is 0.02 to 0.1.
It is preferable to select between 2. If 0.02 or less is used, there is a possibility that sufficient strength may not be obtained against a load. On the other hand, if the ratio is 0.2 or more, the strength is increased, but the weight is increased, which is contrary to the original purpose of reducing the weight.

Also, a honeycomb material can be used as the core material. Examples of the material of the honeycomb material include an aluminum honeycomb, an aramid honeycomb, and the like, and the material and dimensions thereof can be selected according to the required strength and the like.

In general, in a sandwich structure, the peel strength of the skin material and the core material is often low, but the partial structure that is horizontal to the FRP plate of the core material and that of the FRP plate having the protruding portion are different. It is preferable to have a core material between the surfaces, because the weight of the suspended object on the projection acts as a compression load on the interface between the skin material and the core material.

A partial structure in which the core material is fixed in close contact with a horizontal partial structure with respect to the FRP plate, a partial structure in which the core material is fixed in close contact with the surface of the FRP plate having the protruding portion, and It is more preferable to have an auxiliary member (5) having a partial structure that connects the partial structures that are tightly fixed. If a specific cross-sectional shape is shown as an example, a katakana “U” shape is preferable. By using this structure, the weight of the suspended object can be effectively dispersed throughout the panel. The length of the U-shaped horizontal portion is preferably 10 mm to 100 mm. The thickness is preferably 0.5 mm to 10 mm. The material is preferably FRP.

The panel of the present invention is not particularly limited, but is suitable for a truck floor panel.
In this case, a power unit, a side guard, or the like is suspended from the above-mentioned protrusion. Hereinafter, description will be made with reference to drawings (FIGS. 3 to 5) of examples of floor panels for wing trucks, but the invention is not limited thereto.

FIG. 3 shows an example of a truck cargo compartment using the panel of the present invention as a floor panel. The truck cargo compartment comprises a floor panel (6), a frame part (7) provided at the front and rear of the floor panel (6), a center beam (8) connecting the upper center of the frame part, and the center beam. It has a wing panel (9) rotatably attached to (8) and a frame panel (10) attached to a frame part (7), and the floor panel (6) is formed with a projection. FRP panel.

Further, the frame panel body (10), the frame section (7), and the center beam (8) attached to the frame section (7) of the truck cargo compartment are also made of FRP so that the weight of the body can be reduced. It is.

In order to achieve a further weight saving effect, it is preferable to combine some of the above-mentioned members, for example, a floor panel (6) and a wing panel (9).
The cargo compartment for trucks made of FRP, or the frame panel (10) attached to the floor panel (6), the wing panel (9) and the frame part (7) is FR
P cargo truck compartment or floor panel (6) and wing panel (9), frame panel (10) attached to frame (7), and truck with frame (7) composed of FRP The cargo compartment for trucks or the cargo compartment for trucks in which the floor panel (6) and the wing panel (9), the frame part (7), and the center beam (8) are made of FRP have a high weight reduction effect, and each member is made of FRP. Since it can be integrally formed at the time of molding, when the integral molding is performed, the assembling work can be simplified, and a light-weight truck cargo compartment with excellent assemblability can be obtained.

The cargo compartment for trucks is a tilt panel (11)
In the case having the above, the above object can be achieved by forming the tilt panel (11) by FRP, and also in this case, the floor panel (6), the wing panel (9), and the frame portion ( Combination with the frame panel (10), the frame part (7), and the center beam (8) attached to 7) becomes possible.

FIG. 4 is a schematic diagram showing the shape of the floor panel. Inner panel made of FRP skin material (1
2), an outer panel (13) and a space provided between the panels, and a foam synthetic resin material or a honeycomb material (14) is mounted in the space, and FRP is provided in the longitudinal and lateral directions. Reinforcing ribs 10a, 10b, 1
It is preferable to form Oc by integral molding in terms of strength and weight reduction. 10a is also called a horizontal stiffener and plays a role of enhancing the strength and rigidity of the floor panel, which is arranged and connected on the chassis of the truck body.

Although it is possible to bond the panel of the present invention to the rib material by bonding or fastening after molding, it is possible to reduce the strength and durability by covering the rib material with an outer panel and integrating it with the floor panel. Improved and preferred. Further, a core material in which the rib material and the core material of the floor panel are integrated in advance may be used. Alternatively, as shown in the floor panel (6b) having a cross section viewed from the longitudinal direction, the reinforcing rib material of each panel body uses a skin material made of FRP as an outer skin, and a foam synthetic resin material in an inner space portion, or It is also preferable to mount a honeycomb material or the like in terms of strength. As an integral molding method, FRP is conventionally known.
Among them, resin-transfer molding and vacuum bag molding are preferred because large-sized molded articles can be produced at low cost.
In particular, the so-called SCRIMP method is suitable.

On the lower surface of the floor panel, it is necessary to provide a projection for suspending the underfloor bodywork. As the floor panel having the protruding portion, a panel on which the protruding portion of the present invention is formed is used. For example, the floor panel is made of FRP having a core material such as steel having a high tensile strength and an elastic modulus. It is preferable from the viewpoint of strength that they are integrally formed at the time of FRP molding. Also,
The core material of the protruding portion reaches the upper surface of the panel, and near the core material, an FRP connecting the upper and lower surfaces of the panel is provided.
It is preferable to provide a U-shaped reinforcement structure made of steel.

It is preferable from the viewpoint of weight reduction that the protruding portion is disposed only at a necessary position according to the underfloor body to be suspended.

As another form of each panel, the panel is formed by integral molding of a skin material made of FRP and a reinforcing web material composed of a skin material arranged continuously in a longitudinal section or a transverse section of the panel. Are also preferable in terms of weight reduction and strength. Further, it is preferable from the viewpoint of strength that a foam synthetic resin, a honeycomb material, or the like is mounted inside the reinforcing web material composed of the skin material.

By the way, the reinforcing structure made of FRP, which is preferably provided in the vicinity of the core of the protruding portion, can also serve as the reinforcing web. Thereby, while securing the required number of reinforcing web members and the strength of the projections, unnecessary reinforcing web members can be reduced to further reduce the weight.

Further, since the truck is exposed to direct sunlight for a long time, a heat reflecting film may be attached to a portion exposed to direct sunlight in order to prevent the temperature in the cargo compartment from rising. A paint such as ordinary acrylic lacquer or melanin resin may be applied.

In the floor panel, there is provided a cargo compartment for trucks, characterized in that at least one pair of connecting members to the main body chassis is provided on the bottom surface of the longitudinal rib member made of FRP. This facilitates connection with the chassis body and increases the efficiency of the assembly operation.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings.

In this embodiment, the floor panel and the wing panel of the cargo compartment for trucks are made of FRP.

As shown in FIG. 3, the side on which the luggage of the floor panel is placed has an inner panel (12) (5 mm thick) made of GFRP skin material and an outer panel (13).
(Thickness: 3 mm) and a space provided between both panels. In this space, a foamed synthetic resin material (14) (specific gravity 0.0
6) was attached. In addition, reinforcing ribs (15a), (15b), and GFRP skin having a thickness of 4 mm and a foamed synthetic resin material are formed on the lower surface thereof in the vertical and horizontal directions.
(15c) was formed by integral molding.

Further, inside the floor panel, web members 11 made of GFRP were placed at 450 mm intervals along the cross section in the lateral direction.

The structure of the protruding portion (17) for suspending the underfloor bodywork is as shown in FIG. The core material (1) is made of 3.2 mm thick steel, and the part protruding below the floor panel is
For the purpose of imparting corrosion resistance, the structure was entirely covered with GFRP. The core material had a T-shaped cross-sectional structure in which one surface directly contacts the inner panel 7. The core material has a shape like a core material having an L-shaped cross section in FIG. 2, and two rows of φ10 mm holes are provided at one side of a horizontal portion at a pitch of 20 mm. No. 200 was polished. Further, inside the floor panel, the inner panel, which is the FRP plate (3b) having no protruding portion, and the outer panel, which is the FRP plate (3a) having the protruding portion, are connected along the core material. A GFRP reinforcement structure (5) having a V-shaped cross section was provided.

FIG. 5 shows a projection portion (1) for suspending an underfloor bodywork.
7 shows a position 7) and a body attached thereto. As shown in FIG. 5, a side guard, a fender, and a fender support bar were fastened to the protruding portion with a φ10 mm bolt. Since the reinforcing structure (19) of the projection portion has the function of the web member (16), the web member (16) to be disposed near the reinforcing structure (19) is omitted.

Using each of these members, a body was assembled as a truck cargo compartment. Except for the FRP member, a current metal member was used. As a result, the weight of the body is 2,500kg, which is 1,50kg less than the current 4,000kg using metal materials.
Significant weight reduction of 0kg is possible. When the cargo compartment was assembled on a truck chassis and operated on the road, the projections to which the bodywork was attached, or the core material and the outer panel around the projections were not damaged or deformed.

[0049]

The FRP panel of the present invention can be suspended even by a heavy object due to the protruding portion, and can withstand severe vibration such as running on a truck, and has a robust strength.
In addition, the suspension is hardly deformed and destroyed at the protruding portion and the peripheral FRP portion, and exhibits excellent durability. In addition, the heavy material is about the core material, and most of the other strength retaining materials are fiber reinforced plastics, so it is excellent in weight reduction.For example, floor panels, wing panels, tilt panels, panels attached to the frame part are made of fiber reinforced plastic. As a result, it reaches about 30 to 50% as compared with the conventional cargo hold. Furthermore, since the structure can be integrally molded, the assembly work cost is reduced, the weather resistance is remarkably good, and it is hard to deteriorate.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of a protrusion for suspending an underfloor body according to the present invention.

FIG. 2 is a diagram showing examples of various core materials.

FIG. 3 is a schematic perspective view showing one example of a truck cargo hold according to the present invention.

FIG. 4 is a partially sectional perspective view showing an example of a floor panel according to the present invention.

FIG. 5 is a top view showing the arrangement of the underfloor body suspension projections.

[Explanation of symbols]

 1: Core material 1b: ± -shaped core material 1c: I-shaped core material 1d: J-shaped core material 1e: Core material with L-shaped cross section 1f: Cross-section with U-shaped cross section Core material 2: Projection portion 3a: FRP plate on the side with a projection portion 3b: FRP plate on the side without a projection portion 4: Core material 5: Reinforcement structure 6: Floor panel 6a: Floor panel viewed cutaway 6b: Vertical Floor panel of section viewed from the direction 6c: Floor panel of section viewed from the side 7: Frame part 8: Center beam 9: Wing panel 10: Frame panel 11: Aori panel 12: Inner panel made of GFRP 13: Outer panel made of GFRP Panel 13 ': GFRP skin material of rib material 14: Foam synthetic resin material 14': Foam synthetic resin material of rib material 15a: Center side reinforcing rib material (stiffener) 15b: End side reinforcing rib material 1 c: Side-side reinforcing rib material 16: GFRP web material 17a: Side guard protrusion 17b: Side guard protrusion 17c: Side guard protrusion 18a: Fender protrusion 18b: Fender protrusion 19a: Fender support Projection portion 19b: Fender support projection portion 20a: Side guard vertical bar 20b: Side guard vertical bar 20c: Side guard vertical bar 20a: Side guard horizontal bar 20b: Side guard horizontal bar 22a: Fender 22b: Fender 23a: Fender support 23b: Fender support

Claims (24)

[Claims] (1) Tensile strength of 5 kgf / mm ² or more or elastic modulus
A panel characterized in that a protruding portion having a mounting strength capable of being suspended is formed on a surface of an FRP plate by a core material of 250 kgf / mm ² or more. 2. The panel according to claim 1, further comprising a core material. 3. The panel according to claim 2, wherein the panel has a sandwich structure in which FRP plates are arranged on both surfaces of a core material, and has the protrusion on at least one surface. 4. The panel according to claim 1, wherein said core material has a bearing strength of 20 kgf / mm ² or more in a pin diameter range of 4 to 16 mm. 5. The panel according to claim 1, wherein the core material has a tensile strength of 5 kgf / mm ² or more. 6. The panel according to claim 1, wherein the elastic modulus of the core material is 250 kgf / mm ² or more. 7. The panel according to claim 1, wherein the compressive strength of the projection is 10 kgf / mm ² or more. 8. The panel according to claim 1, wherein said core material is metal or ceramic, or FRP made of a material different from that of said FRP plate. 9. The panel according to claim 1, wherein the height of the projection is 15 mm to 150 mm. 10. The panel according to claim 1, wherein said projection has a thickness of 2 mm to 20 mm. 11. The panel according to claim 1, wherein the projection has a through hole. 12. The panel according to claim 1, wherein the FRP of the FRP plate is CFRP. 13. The panel according to claim 1, wherein the reinforcing fibers of the FRP board are woven fabrics. 14. The panel according to claim 1, wherein said core material has a partial structure horizontal to said FRP plate. 15. The core material according to claim 15, wherein the core material has a core material between a partial structure horizontal to the FRP plate and a surface of the FRP plate having the protruding portion. Panel. 16. A partial structure in which the core material is fixed in close contact with a horizontal partial structure with respect to the FRP plate, and a partial structure in which the core material is fixed in close contact with the surface of the FRP plate having the projection from the inside. 2. The panel according to claim 1, further comprising an auxiliary member having a partial structure connecting the partial structures fixedly adhered to each other. 17. The panel according to claim 1, wherein a stiffener is bonded. 18. A truck floor panel using the panel according to claim 1. 19. The panel according to claim 1, wherein an accessory mounted on a lower portion of the truck floor is suspended by the projecting portion. 20. A truck using the panel according to claim 1. 21. The panel according to claim 1, wherein a portion of the core protruding from the surface of the FRP plate is substantially perpendicular to the FRP plate. 22. The panel according to claim 21, wherein a portion of the core protruding from the surface of the FRP plate has a portion parallel to the FRP plate. 23. The panel according to claim 1, wherein said core material has a T-shape. 24. The panel according to claim 16, wherein the auxiliary member has a U-shape.