JPH10258778A - Truck bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a rear droop of a bed by partially enhancing the bending rigidity of the front/rear direction of a truck in the front/rear direction of the truck of a floor body including an FRP board. SOLUTION: A high-rigidity core material 35 is partially arranged in the front/rear direction 25 of a truck constituted of a panel board 21 of a sandwich structure having the core material. For example, a wood is used as the high- rigidity core material 35, or a metal material, other high-rigidity materials, or a member whose rigidity is structurally enhanced by a honeycomb structure, etc., is used. It is preferable that the high-rigid core material 35 is positioned on the rear wheel of the truck so that the bending rigidity in the front/rear direction 25 of the truck is locally enhanced. This constitution can drastically reduce the rear droop quantity in the rear end of the bed, while realizing the weight reduction of the truck whole body, so as to provide a high-performance truck in use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck bed, and more particularly, to a truck bed having a floor including an FRP (fiber reinforced plastic) plate.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 15, a truck bed 202 is mounted on a main body chassis 203 extending in the vehicle front-rear direction of the truck 201. A front wheel 205 is provided below a driver's seat 204 and a rear portion of the truck 202 is provided. Rear wheel 20 below the part
6 are arranged respectively.

In the truck bed 202 having such a structure, the deflection of the bed 202 may cause a problem particularly in the case of a long truck having a large loading weight. The deflection curve 207 is normally as shown in FIG.
It becomes largest at the rear end of the loading platform 202. This bending of the rear end is generally called a buttocks, which becomes large especially when a load is loaded.

[0004] Usually, the main body chassis 203 is designed in consideration of such buttocks, but there is a possibility that consideration only on the main body chassis 203 side may be insufficient. Therefore,
It is desirable to take countermeasures against buttocks on the loading platform 202 side of the truck.

[0005] Recently, for the purpose of reducing the weight of the truck bed and the cargo compartment, it has been proposed to construct the cargo bed and the cargo compartment using FRP material (for example, Japanese Patent Application No. 8-207).
737). Even with such a loading platform using FRP material, measures are required to prevent buttocks.

[0006]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a structure which can minimize the buttocks of a truck bed including an FRP material.

[0007]

In order to solve the above-mentioned problems, a truck bed of the present invention has a floor including an FRP plate, and the bending rigidity of the floor in the truck longitudinal direction is determined in the truck longitudinal direction. It is characterized by being partially elevated.

It is effective that the bending stiffness is increased at least on the rear wheel, based on the bending curve of the cargo bed that causes the buttocks as shown in FIG.

The floor structure can be constructed by using a single FRP plate, but two FRP plates and the FRP plate are used.
It is preferable to include a panel member having a sandwich structure with a core material interposed between RP plates.

In the case of such a sandwich panel member, a foam material or the like is used as the core material, for example, from the viewpoint of weight reduction, but it has a higher rigidity partially (for example, on the rear wheel) in the longitudinal direction of the truck. By disposing a core material such as wood, the bending rigidity of this portion can be locally improved.

In order to partially increase the bending rigidity, the FRP plate may be partially thickened in the front-rear direction of the track. The fibers may be provided, and the angle of the reinforcing fibers provided on the FRP plate with respect to the track front-back direction may be partially reduced in the track front-back direction.

When the floor has at least two vertical joists extending in the longitudinal direction of the track on the underside of the floor, the bending rigidity of the vertical joists in the longitudinal direction of the track may be partially increased in the longitudinal direction of the track. it can. Of course, the bending stiffness of both the vertical joist and the FRP plate (including those with a sandwich structure) may be partially increased.

This vertical joist can also be constructed in a structure including an FRP skin plate and a core material, and a structure in which a highly rigid core material (for example, wood) is partially disposed in the longitudinal direction of the track.
A structure in which the RP skin plate is partially thickened in the front-rear direction of the track, a structure in which reinforcing fibers having a high elastic modulus are partially disposed in the front-rear direction of the FRP skin plate, and a structure in which the reinforcing fibers disposed in the FRP skin plate are provided. The bending rigidity of the vertical joist can be partially increased in the longitudinal direction of the track by a structure in which the angle with respect to the longitudinal direction of the track is partially reduced in the longitudinal direction of the track.

When the floor has at least two vertical joists extending in the front-rear direction of the track on the lower surface thereof, the floor between the vertical joists is partially thickened in the front-rear direction of the track, whereby the floor is formed. Can be partially increased in bending stiffness.

Further, the floor may have a structure including a stiffener partially in the longitudinal direction of the track. For example, a metal such as iron or aluminum is used as such a stiffening material, and the metal material can be insert-molded into a floor made of an FRP material.

Further, when the floor has side rails extending in the front-rear direction of the track on its side, the bending rigidity of the side rails in the front-rear direction of the track can be partially increased in the front-rear direction of the track. The same means as described above can be applied to the means for increasing the bending rigidity of the side rail.

In the truck bed according to the present invention, since the bending rigidity of the floor body in the front-rear direction of the truck is partially increased, for example, on the rear wheel, the floor body is bent toward the rear end of the bed. A certain buttocks is efficiently suppressed by the high bending rigidity, and the buttocks are suppressed to a small amount.

Further, since the bending stiffness is only partially increased, the increase in the weight of the entire carrier is negligible, if any, and the lightness of the carrier due to the use of the FRP plate is substantially reduced. Is secured as it is.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the truck bed of the present invention will be described below with reference to the drawings. FIG. 1 shows a truck provided with a truck bed having a floor according to an embodiment of the present invention (particularly, a cargo hold for trucks in this embodiment). FIG. 2 is a schematic plan view of the truck before mounting the cargo compartment for trucks.

In FIG. 1, a cargo hold 2 of a truck 1 has
A floor panel 3 as a floor including an FRP plate, a front section frame (front section structure) 4 and a front panel 5 provided on the front side of the floor panel 3, and a rear panel on the rear side of the floor panel 3. A rear section frame (rear section structure) 6 and a door panel 7 as a rear panel, a wing panel 8 which forms a ceiling portion and an upper side portion of the cargo compartment 2 and can be lifted upward on both sides, and a lower portion of the side portion of the cargo compartment 2 To form
It has a swing panel 9 that can be opened and closed downward on both sides. The wing panel 8 is rotated about a center beam 11 and is opened and closed by, for example, a hydraulic cylinder 10. In the present embodiment, the tilt panel 9 is the front and rear panels 9.
a and 9b.

The cargo compartment 2 is mounted on, for example, two parallel extending main body chassis 13 extending rearward of the driver's seat 12 as shown in FIG. A front wheel 14 is arranged below the driver's seat 12, and a rear wheel 15 is arranged on a rear side of the main body chassis 13.

FIG. 3 shows an example of the configuration of a floor panel 3 as a floor body. In this embodiment, F is used as a floor material.
FRP panel member 21 including RP plate, panel member 21
And a reinforcing member 22 provided on the lower surface side of the base member, and these are configured as being integrally formed. The reinforcing member 22 has a horizontal joist 23 and two parallel vertical joists 24 located immediately above the main chassis 13 and extending in the track front-rear direction 25.

The floor panel 3 as a floor and the main body chassis 13 are vertically connected as shown in FIG. 4, and this connection is made at a connection point A to the driver's seat 12 and above the rear wheel 15. (In this embodiment, a point above the center point of the two rear wheels in the front-rear direction) B, and the point C in the figure is the rear end of the cargo bed, which is a problem of buttocks. Is shown.

The bending curve of the bed generally takes the form of a characteristic line 26 shown in FIG. 5 in consideration of the sinking amount of the tire of the rear wheel 15. At this time, the sinking margin (bending margin) from the rear shaft center at the rear end portion C of the carrier is the buttocks 28. In the present invention, the buttocks 28 are kept as small as possible.

The panel member 21 as a floor material forming the surface of the floor panel 3 is configured, for example, as shown in FIGS. In the configuration shown in FIG.
The floor panel 21 has a sandwich structure of two FRP plates 31 and 32 and a core material 33 disposed therebetween. For example, a foam material can be used as the core material 33 from the viewpoint of weight reduction. In the configuration shown in FIG. 6B, a web 34 extending between the FRP plates 31 and 32 is added as compared with the structure shown in FIG. Web 34 is F
It can be formed integrally with the RP plates 31 and 32.

In the present invention, the following various structures can be employed in order to partially increase the bending rigidity of the floor in the truck longitudinal direction in the truck longitudinal direction. In the sandwich panel member 21 having the core member 33 as described above, a structure in which the high-rigidity core member 35 is partially disposed in the track front-rear direction 25 as shown in FIG. 7 can be adopted. As the high-rigidity core material 35, for example, wood can be used, and in addition, a metal material or another high-rigidity material, or a member having a structurally enhanced rigidity by a honeycomb structure or the like can also be used.

The most suitable location for the high-rigidity core material 35 is on the rear wheel 15, ie, point B in FIG. By arranging the high-rigidity member 35 in this manner, the bending rigidity in the track front-back direction 25 at the point B is locally increased, and thereby the amount of bending downward on the rear side is reduced. Can be reliably reduced.

When the vertical joist 24 has a structure including the FRP skin plate 41 and the core material 42 as shown in FIGS. At 25, the high-rigidity core material 43 may be partially disposed. As the high-rigidity core member 43, the same one as in the panel member 21 can be used, and the arrangement position in the track front-back direction 25 may be the same position. In addition, by combining with the above-described structure for partially increasing the rigidity of the panel member 21, it is possible to further reduce the amount of butt dripping.

As shown in FIG. 9, the FRP plates 51, 52 of the FRP panel member 21 are
It is also possible to adopt a structure in which the thickness is partially increased. The thickening portion 53 may be provided on both or one of the FRP plates 51 and 52, and preferably, the thickening portion 53 is preferably increased toward the inside of the panel so that a step is not formed above and below the floor surface. Even in such a thickened structure, the bending rigidity of the floor can be partially increased in the track front-rear direction 25, and the amount of buttocks droop can be reduced. Although not shown, this thickening structure can be applied to a vertical joist.

Further, as shown in FIG.
Part in at least one of the FRP plates 31 and 32 in 1, the angle theta with respect to the track longitudinal direction 25 of the reinforcing fibers 61 which are arranged on the FRP plate, to an angle ± theta ₁ at other sites, in the track longitudinal direction 25 it is also effective to a smaller angle ± theta ₂ in manner. In this case, the reinforcing fiber angle ± theta ₂ may be arranged with reinforcing fiber angle ± theta ₁ (may be added), or may be partially disposed independently. When the angle θ ₂ of the reinforcing fiber 61 becomes smaller, the angle becomes closer to the track front-rear direction 25, so that the bending rigidity in the track front-rear direction 25 is further increased at this portion. This configuration in which the angle of the reinforcing fiber is partially reduced in the track front-back direction 25 can be applied to a vertical joist.

Although not shown in the drawings, it is also effective to replace the reinforcing fiber with the angle of the reinforcing fiber or to change the reinforcing fiber partially into a high modulus fiber in the longitudinal direction of the track. For example, when using carbon fibers as the reinforcing fibers, partially higher grades of high modulus carbon fibers can be used.

As a means for partially increasing the bending stiffness in the longitudinal direction of the track, a structure in which a stiffening material is disposed on the floor can be adopted. For example, as shown in FIG. 11, a structure in which a stiffening material 71 is arranged in the vertical joist 24 is used. For example, a metal plate such as an iron plate or an aluminum plate can be used as the stiffening member 71. In the case of the structure shown in FIG. 11, insert molding can be performed at the time of forming the vertical joist 24. Needless to say, a structure of sticking or fixing on the outer surface side is also possible. Further, the direction in which the cross-section of the stiffening member 71 extends may be the vertical direction.

As shown in FIG. 12, when there are at least two vertical joists 24 extending in the truck longitudinal direction, the floor panel 81 of the floor is partially thickened in the truck longitudinal direction between the vertical joists 24. By doing so, it is also possible to partially increase the bending rigidity in the track front-back direction. The thickened portion 82 may be provided on the lower surface side of the floor panel 81, and there is no possibility that the thickened portion 82 will interfere with a rear wheel or the like in the case of mounting on the vertical joist.

Further, when the floor panel 21 has side rails extending in the front-rear direction of the track on its side (both sides), the bending rigidity of the side rail in the front-rear direction of the track is partially increased in the front-rear direction of the track. It is also effective. For example, as shown in FIG. 13, a stiffening member 92 is partially disposed in a side rail 91 integrally formed with the floor panel 21, for example, in the side rail 91 in the track front-rear direction. As the stiffener 92, the same material as that of the vertical joist described above can be used.

In the present invention, the bending rigidity of the floor including the FRP plate is partially increased in the front-rear direction of the truck in order to reduce the amount of trailing of the truck bed. When a spacer (for example, a cushioning material) is interposed between the main body chassis and the spacer, it is possible to similarly reduce the amount of the bottom of the floor by devising the shape of the spacer.

For example, as shown in FIG. 14, the spacer 101 arranged on the main body chassis 13 is tapered from a portion in the track front-back direction 25, for example, from the point B on the rear wheel to the rear end. It is a thicker structure. In such a structure, the amount of sag of the main body chassis 13 cannot be reduced, but the amount of slump of the cargo bed is surely reduced.

As described above, in the present invention, the FRP
In a truck bed having a floor including a plate, the bending stiffness of the floor in the truck front-rear direction can be partially increased in the truck front-rear direction by any of the above-described structures or a combination of these structures. In particular, by increasing the bending stiffness on the rear wheel, the amount of deflection of the carrier at the rear end side is significantly reduced, and the amount of trailing edge of the rear end of the carrier is significantly reduced.

By the way, in a truck having a total weight of 25 tons with one front wheel and two rear wheels mounted on a bed having a total length of 9,756 mm including a FRP board, the truck is mounted on a main body chassis on the rear wheel. As a core material of the vertical joist at the part (one point in the longitudinal direction of the truck), wood was placed on the foamed material of the other part, and the bending rigidity of this part was improved by about 40%, and the rear end of the cargo bed was calculated. The droop amount is 15mm before remodeling and 1
It decreased by about 33% to 0 mm.

Although FIG. 1 illustrates a truck having a wing panel or the like, the present invention can be applied to any truck having a floor including an FRP plate.

[0040]

As explained above, according to the truck bed of the present invention, the bending rigidity of the floor including the FRP plate is partially increased in the longitudinal direction of the truck, so that the trailing edge of the trailing end of the bed is reduced. It can be significantly reduced. By using the FRP material, it is possible to provide a truck with extremely low performance by reducing the amount of buttocks while realizing the weight reduction of the bed and eventually the entire truck.

[Brief description of the drawings]

FIG. 1 is a perspective view of a truck having a cargo bed (cargo compartment) mounted thereon according to an embodiment of the present invention.

FIG. 2 is a plan view of the truck in FIG. 1 before the cargo compartment is mounted.

FIG. 3 is a perspective view of a floor panel of the truck shown in FIG. 1;

FIG. 4 is a schematic side view of a truck having a loading platform mounted thereon.

FIG. 5 is a characteristic diagram showing a bending curve of a floor in the truck of FIG. 4;

FIG. 6 is a partial longitudinal sectional view showing a configuration example of an FRP panel member of a floor body.

FIG. 7 is a partial longitudinal sectional view of a panel member showing an example of a bending rigidity improving means.

FIG. 8 is a partial longitudinal sectional view of a floor showing another example of the bending rigidity improving means.

FIG. 9 is a partial vertical sectional view of a panel member showing still another example of the bending rigidity improving means.

FIG. 10 is a FR showing still another example of the bending rigidity improving means.
It is a partial top view of a P board.

FIG. 11 is a partial longitudinal sectional view of a floor showing still another example of the bending rigidity improving means.

FIG. 12 is a longitudinal sectional view in the track width direction of a floor showing still another example of the bending rigidity improving means.

FIG. 13 is a partial longitudinal sectional view of a floor body showing a means for improving the bending rigidity of the floor body having side rails.

FIG. 14 is a partial perspective view of the main body chassis showing another means for reducing the amount of buttocks of the carrier.

FIG. 15 is a schematic side view of a conventional truck.

FIG. 16 is a characteristic diagram showing a deflection curve of a bed of the truck of FIG. 15;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Truck 2 Cargo compartment 3 Floor panel as a floor body 12 Driver's seat 13 Main body chassis 14 Front wheel 15 Rear wheel 21 Panel member 22 Reinforcement member 23 Horizontal joist 24 Vertical joist 25 Track longitudinal direction 26 Flexure curve 28 Butt droop (amount) 31, 32, 51, 52 FRP board 33, 42 Core material 34 Web 35, 43 High rigidity core material 41 FRP skin material 53 Thickened part 61 Reinforced fiber 71, 92 Stiffening material 81 Floor 82 Thickened part 91 Side rail 101 Spacer

Claims (19)

[Claims] 1. A truck bed having a floor body including an FRP plate, wherein a bending rigidity of the floor body in the truck front-back direction is partially increased in the truck front-back direction. 2. The truck bed of claim 1, wherein said bending stiffness is increased at least on a rear wheel. 3. The floor body comprises two FRP plates and the FRP plate.
3. The truck bed according to claim 1, further comprising a panel member having a sandwich structure with a core material interposed between the plates. 4. The truck bed according to claim 3, wherein a high-rigidity core material is partially disposed in the truck front-back direction. 5. The truck bed of claim 4, wherein said high-rigidity core material is made of wood. 6. The truck bed according to claim 1, wherein said FRP plate is partially thickened in the truck front-rear direction. 7. The truck bed according to claim 1, wherein a reinforcing fiber having a high elastic modulus is partially disposed in the FRP plate in the truck front-back direction. 8. The truck bed according to claim 1, wherein the angle of the reinforcing fibers arranged on the FRP plate with respect to the truck longitudinal direction is partially reduced in the truck longitudinal direction. 9. The floor body has at least two longitudinal joists extending in the truck longitudinal direction, and the bending rigidity of the longitudinal joists in the truck longitudinal direction is partially increased in the truck longitudinal direction. A truck bed according to any one of 1 to 8. 10. The truck bed of claim 9 wherein said joist includes an FRP skin plate and a core material. 11. The truck bed according to claim 10, wherein a high-rigidity core material is partially disposed in the longitudinal joist in the front-rear direction of the truck. 12. The truck bed of claim 11, wherein the high rigidity core material comprises wood. 13. The truck bed according to claim 10, wherein the FRP skin plate is partially thickened in the truck front-back direction. 14. The truck bed according to claim 10, wherein reinforcing fibers having a high elastic modulus are partially disposed in the FRP skin plate in the truck front-back direction. 15. The angle of the reinforcing fibers provided on the FRP skin plate with respect to the track front-back direction is partially reduced in the track front-back direction.
15. The truck bed according to any one of items 14 to 14. 16. The floor body has at least two vertical joists extending in the truck longitudinal direction, and the floor body between the vertical joists is partially thickened in the truck longitudinal direction. A truck bed according to any of the above. 17. The floor body partially includes a stiffener in the truck front-back direction.
A truck bed according to any of the above. 18. The truck bed of claim 17, wherein said stiffener comprises insert molded metal. 19. The floor according to claim 1, wherein the floor has side rails extending in the front-rear direction of the track on the side portions, and the bending rigidity of the side rails in the front-rear direction of the track is partially increased in the front-rear direction of the track. A truck bed according to any one of claims 18 to 18.