JPH092321A - Undercarriage of truck platform - Google Patents

Abstract

PURPOSE: To heighten structural strength, facilitate assembling, and economical. CONSTITUTION: A truck carrier has an aluminum transverse joist 3 and an aluminum longitudinal beam 5 crossing perpendicular to the transverse joist 3 so as to be fixed thereto, where the longitudinal beam 5 is formed by a hollow material. Further, the longitudinal beam 5 and anti-slip member 16 for preventing slippage between the longitudinal beam 5 and a chassis frame 24 are fastened using a spacer 7 which is intermediately disposed in a hollow part of the longitudinal beam 5 penetrating through the part. The longitudinal beam 5 has a recessed part 10 at the bottom 9 of the beam 5 so as to escape a head 26 of around head rivet 25 projecting from the chassis frame 24, and a recessed groove 12 at the top of the beam 5 so as to fit in the head of a stud 13a for connecting the longitudinal beam 5 and the transverse joint 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower structure of a truck bed having aluminum horizontal joists and vertical joists provided under the truck bed. In the present invention, the term "made of aluminum" is used to mean a product made of pure aluminum or an aluminum alloy.

[0002]

2. Description of the Related Art A conventional undercarriage 100 for a truck carrier.
For example, as shown in FIG. 5, a plurality of cross-sections arranged at a predetermined interval are U-shaped or J-shaped and made of aluminum horizontal joist 101, and a plurality of cross-sections made of aluminum are also U-shaped or J-shaped. The vertical joist 103 is fixed with bolts 102a and nuts 102b, and the insulating material 106 also serving as a spacer is sandwiched between the vertical joist 103 and the steel chassis frame 107 to prevent the vertical joist 103 from slipping. The anti-slip member 104 is fixed to the vertical joist 103 and the chassis frame 107 by using fastening means such as bolts 105a and nuts 105b.

Further, the insulating material 106 has a thickness of about 30 mm.
This is a plastic extruded material having a U-shaped or U-shaped groove 106a for accommodating the head 108a of the round-head rivet 108 when the chassis frame 107 and the cross member 109 are joined by the round-head rivet 108. . The role of the insulating material 106 is to prevent electrolytic corrosion of the vertical joist 103 by direct contact between the vertical joist 103 which is an extruded material made of aluminum and the chassis frame 107 made of steel, and also has a role as a cushioning material and a spacer. It was

[0004]

However, in the above-described conventional truck bed lower structure 100, the vertical joist 103 having a U-shaped cross section or a J-shape used for this is sufficient for the loading load of the truck bed. I couldn't stand it and could buckle. Further, since the insulating material 106 is provided with the U-shaped groove 106a for accommodating the head 108a of the round-head rivet 108, its thickness is large, and the insulating material 10
There is a risk that not only the weight of No. 6, the cost of materials and the like increase, but also the joint strength between the vertical joist 103 and the chassis frame 107 is reduced. In addition, since the plurality of horizontal joists 101 and the vertical joists 103 are fastened with the bolts 102a and the nuts 102b, it is difficult to work locally and spatially, and it takes time and labor for the assembling work.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a truck carrier undercarriage which has high structural strength, is easy to assemble, and is economical.

[0006]

In order to solve the above-mentioned problems, the present invention provides a lower structure of a truck carrier having a horizontal joist made of aluminum and an aluminum vertical joist fixed to intersect the lateral joist. In the above, the vertical joists are formed of a hollow material.

Further, in the above invention, the vertical joist,
A non-slip member for stopping slippage between the vertical joist and the chassis frame supporting the truck carrier is fastened via a spacer penetrating the hollow portion of the vertical joist.

Further, in any one of the above inventions, the vertical joist has a recess at the bottom of the vertical joist for retreating the projection of the fixing means projecting from the chassis frame.

Further, in any one of the above inventions, the vertical joist has a groove on the upper part of the vertical joist into which one end of fastening means for connecting the vertical joist and the horizontal joist is fitted.

[0010]

According to the lower structure of the truck bed of the present invention, the one having the vertical joists formed of the hollow material has a light weight and structural strength, and the vertical joists themselves are suitable for the load of the load loaded on the truck bed. Can withstand enough and does not buckle easily.

Further, in the above invention, the vertical joist and the anti-slip member are fastened via a spacer penetrating the hollow part of the vertical joist, in addition to the function of the above invention, the vertical joist and the anti-slip member are combined. Even if the tightening means such as a tightening screw is used for the strong tightening, the vertical joists are not deformed by the tightening means and are securely fastened.

Further, in any one of the above inventions, in the bottom of the vertical joist having a recess for retreating the protrusion of the fixing means projecting from the chassis frame, in addition to the operation of any one of the above inventions, the vertical joist and the chassis. The thickness of the insulating material interposed between the frame and the frame can be reduced, and the strength of the lower structure of the truck carrier can be improved.

In any one of the above inventions, the one having the concave groove into which one end of the fastening means is fitted in the upper part of the vertical joist has the function of any one of the above inventions, and in addition to the operation of connecting the vertical joist and the horizontal joist. And the installation pitch of the horizontal joist can be freely designed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the lower structure of a truck carrier according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a sectional view of an essential part showing an embodiment of a lower structure of a truck carrier according to the present invention. The lower structure 1 of the truck carrier of the present embodiment is formed of a horizontal joist 3 formed of an extruded aluminum material and an extruded hollow material of the same aluminum that is fixed by intersecting the lateral joist 3 at a right angle. It has a vertical joist 5.

Further, the extruded hollow material made of aluminum of the vertical joist 5 is a so-called fixing means which is formed by what is called an extruded shape material having a hollow portion 6 inside a closed cross section and which projects from the chassis frame 24 at the bottom portion 9. The round head rivet 25 has a recess 10 for retracting a head 26 which is a projection. The upper portion 11 has a groove 12 into which the head of a stat bolt 13a, which is a fastening means for connecting the vertical joist 5 and the lateral joist 3, is fitted.

The vertical joist 5 is a non-slip member 1 for stopping slippage between the vertical joist 5 and the chassis frame 24 supporting the truck carrier.
Chassis frame 2 supporting a truck bed by 6
4, the washer 17c is applied to the outside of the anti-slip member 16 and the inside of the chassis frame 24, and is fixed via the bolt 17a and the nut 17b. Vertical joist 5
The anti-slip member 16 is fastened by a bolt 8a, a nut 8b, and a washer 8c via a spacer 7 penetrating the hollow portion 6 of the vertical joist 5. Spacer 7 is bolt 8
An aluminum pipe provided in the hollow portion 6 so that the vertical joist 5 is not deformed by tightening a and the nut 8b, and is reinforced so that the vertical joist 5 is not deformed.

The spacer 7 has a hole through which the spacer 7 can be inserted, on one side wall of the vertical joist 5, and a hole through which the bolt 8a can pass, on the other side wall. This allows
The spacer 7 is inserted from one side wall and abuts on the other side wall. The washer 8c is interposed on the head side of the bolt 8a, the vertical joist 5 and the spacer 7 are sandwiched, and the vertical joist 5 and the anti-slip member 16 are tightened. Therefore, overtighten it with a vertical joist 5
Is not deformed. In the present embodiment, the recess 10 has a semicircular cross section, is formed by extrusion processing in the form of a vertical groove over the longitudinal direction of the vertical joist 5, and is formed so that the head of the round head rivet 25 is inserted therein. Therefore, the insulating material 20 serves only as an insulating material, and is thinned to about 3 mm.

The lower structure of the truck carrier of the present embodiment has improved buckling strength as compared with the conventional vertical joists made of channel-shaped aluminum extruded material, and the space between the vertical joists 5 and the chassis frame 24 is increased. The thickness of the insulating material 20 is reduced, and the connection structure with the horizontal joist 3 which is also made of aluminum and is placed on the vertical joist 5 is improved. In addition, reference numeral 29 indicates a round head rivet 2 on the chassis frame 24.
It is a cross member fixed at 5.

FIG. 2 is a side view of the vertical joist of the embodiment shown in FIG. The vertical joist 5 is a long member, and the spacers 7 are provided at a plurality of positions in the longitudinal direction, and the double-sided adhesive tape 2 is provided on the bottom portion 9.
The insulating material 20 is fixed by 2.

3A and 3B show a connecting structure of the vertical joist 5 and the lateral joist 3 of the embodiment of FIG. 1, FIG. 3A being a perspective view and FIG. 3B being a perspective view of a stat bolt. The groove 12 has a C-shape that opens upward and has a narrow opening. The groove 12 extends in the longitudinal direction of the vertical joist 5. The head of the stat bolt 13a is formed by extrusion so that the conventional U-shaped aluminum extruded material can be easily joined to the lateral joist 3. As shown in (B), since the head of the stat bolt 13a is formed in a rectangular parallelepiped, it is fitted in the groove 12 of the vertical joist 5 and then rotated 90 degrees to lock the head in the groove 12. Try not to come off. Then, the threaded portion of the stat bolt 13a is passed through the hole provided in the lateral joist 3 and fastened with the nut 13b.

FIG. 4 shows the insulating material 20. The double-sided adhesive tape 22 is attached to the entire length of one side in the longitudinal direction, and is easily formed on the vertical joist 5. A long hole 21 through which a round-head rivet 25 projecting from the chassis frame 24 penetrates is provided near one end by punching with a press to provide a clearance for attachment. Insulation 2
The material of 0 is formed of vinyl chloride or other synthetic resin.

The lower structure of the truck carrier of this embodiment having the above structure operates as follows. That is, vertical joist 3
Of the extruded hollow material made of aluminum, the vertical joists themselves are lightweight and strong, and are less likely to buckle under the load of a load loaded on a truck bed.

Further, the vertical joist 3 and the non-slip member 16 are
What is fastened with the bolt 8a, the nut 8b, and the washer 8c through the spacer 7 that penetrates the hollow portion of the vertical joist 3, the vertical joist that is tightened by the bolt 8a, the nut 8b, and the washer 8c. Securely tighten without deformation of No. 5.

Further, a recess 1 for retracting the head of a round head rivet projecting from the chassis frame 24 on the bottom 9 of the vertical joist 5
Those having 0 need not increase the wall thickness of the insulating material 20, and improve the structural strength of the lower structure of the truck carrier.

The upper part 11 of the vertical joist 5 having the recessed groove 12 into which the head of the stat bolt 13a for connecting the vertical joist 5 and the lateral joist 3 is fitted has a function of connecting the vertical joist 5 and the lateral joist 3 to each other. It is easy and the installation pitch of the horizontal joist 3 can be freely designed.

Although the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited only to those embodiments by that, and various modifications can be made without departing from the spirit of the present invention. In addition, it goes without saying that various modifications can be made.

[0028]

According to the lower structure of the truck bed of the present invention, the one having the vertical joists formed of the hollow material is light in weight and structural strength, and is sufficient for the load of the truck bed. Hard to buckle and buckle.

Further, in the above invention, the vertical joist and the non-slip member are fastened via the spacer penetrating the hollow portion of the vertical joist, in addition to the effects of the above invention, the vertical joist is tightened by the fastening means. Securely tightens without deformation.

Further, in any one of the above inventions, in addition to the effect of any one of the above-mentioned inventions, in addition to the effect of any one of the above-mentioned inventions, the bottom of the vertical joist has a recess for retracting the projection of the fixing means projecting from the chassis frame. The thickness can be reduced and the strength of the undercarriage of the truck bed is improved.

In any one of the above inventions, the one having the concave groove into which one end of the fastening means is fitted is provided on the upper part of the vertical joist, in addition to the effect of any one of the above inventions, in addition to the operation of connecting the vertical joist and the horizontal joist. And the installation pitch of the horizontal joist 3 can be freely designed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a lower structure of a truck carrier according to the present invention.

FIG. 2 is a side view of the vertical joist of the embodiment of FIG.

3A and 3B show a connecting structure of a vertical joist and a horizontal joist according to the embodiment of FIG. 1, FIG. 3A being a perspective view and FIG. 3B being a perspective view of a stat bolt.

FIG. 4 is a perspective view of the insulating material of the embodiment of FIG. 1 and a double-sided adhesive tape stretched on the insulating material.

FIG. 5 is a perspective view of a lower structure of a truck carrier according to the related art.

[Explanation of symbols]

 1 Undercarriage of a truck carrier 3 Horizontal joist 5 Vertical joist 7 Spacer 9 Bottom 10 Recess 11 Upper 12 Recessed groove 13a Stat bolt (fastening means) 13b Nut (fastening means) 16 Non-slip member 24 Chassis frame 25 Round head rivet (fixing means) ) 26 heads (projections)

Claims (4)

[Claims] 1. In a lower structure of a truck carrier having a horizontal joist made of aluminum and a vertical joist made of aluminum fixed to intersect the lateral joist, the vertical joist is formed of a hollow material. The lower structure of the truck bed, which is characterized by being. 2. The anti-slip member for preventing slippage between the vertical joist and the chassis frame supporting the truck carrier according to claim 1, further comprising a spacer penetrating a hollow portion of the vertical joist. The lower structure of the truck bed, which is fastened via 3. The truck bed according to claim 1, wherein the vertical joist has a recess at the bottom of the vertical joist for withdrawing a protrusion of a fixing means protruding from the chassis frame. Substructure of. 4. The vertical joist according to any one of claims 1 to 3, wherein the vertical joist has a groove on the upper part of the vertical joist, into which one end of a fastening means for connecting the vertical joist and the horizontal joist is fitted. The lower structure of the truck bed, which is characterized by that.