JPH11348816A - Structure for reinforcing load carrying platform of truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the use life of a load carrying platform frame and to facilitate work reinforcing the load carrying platform frame so that the platform frame can be effectively reinforced with a simple structure. SOLUTION: A load carrying platform 26 is composed of a load carrying platform frame 27 constituting the lower part of the platform and supported on the road surface by means of wheels, and a box 28 laid on the frame 27. The platform frame 27 is composed of left and right side frames 12, 12 which define left and right side parts of the platform and extending longitudinally, cross-members coupling the side frames 12, 12 with each other, and front and rear brackets 29, 30 projected upward from the side frames 12, 12 and having projected end parts for carrying and supporting thereon the box 28. The projected end parts of the front and rear brackets 29, 30 are coupled to one other by a reinforcing bar 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a carrier frame,
The present invention relates to a truck bed reinforcement structure having a cargo box supported on the bed frame.

[0002]

2. Description of the Related Art Generally, a truck bed is constituted by a bed frame which constitutes a lower portion and is supported on a road surface via wheels.
And a cargo box disposed above the carrier frame (Japanese Utility Model Laid-Open No. 57770/96).

[0003] In the above construction, conventionally, the loading frame constitutes left and right side portions thereof and extends in the front-rear direction, left and right side frames, a cross member connecting the side frames to each other, and Before the upper end is protruded upward and the loading box is placed on the protruding end thereof to be supported, and there is a rear bracket, and each side frame of the loading platform frame includes:
Counter external force from the wheel side or packing box side.

[0004]

By the way, when the vehicle is traveling, particularly when the road surface is rough and the cargo loaded in the cargo box is heavy, each side frame has a large size. When an external force is repeatedly applied, these left and right side frames are repeatedly bent with a large amount of bending.

[0005] In this case, the bending of the left and right side frames is repeated so as to be alternately exchanged between the left and right side frames, and the loading frame is twisted. The stress concentration is repeatedly generated at the joint portion with the carrier, and the life of the carrier frame may be shortened.

[0006] Therefore, by reinforcing the loading frame and reducing the deflection of each side frame,
It is conceivable to improve the life of the carrier frame. However, it is not easy to achieve the reinforcement for reducing the deflection of each side frame effectively and with a simple configuration. In addition, there is a possibility that the operation for reinforcing the carrier frame becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it has been found that reinforcement of a carrier frame is effective and
It is an object of the present invention to improve the life of the carrier frame and to facilitate the work for reinforcing the carrier frame by achieving a simple structure.

[0008]

The above and other objects, features and advantages of the present invention will become apparent from the following description of the preferred embodiments of the invention.

According to the first aspect of the present invention, the loading frame 26 constitutes a lower portion of the loading frame 27 supported on the road surface via the wheels 8 and the loading box 28 disposed above the loading frame 27. The left and right side frames 12, the loading frame 27 constituting left and right sides thereof and extending in the front-rear direction.
12, cross members 14 to 16 for connecting these side frames 12 and 12 to each other, and before the packing boxes 28 are mounted on the protruding ends of the side frames 12 to be supported. , A truck with rear brackets 29, 30;

A reinforcing bar 46 for connecting the protruding ends of the front and rear brackets 29 and 30 to each other is provided.

According to a second aspect of the present invention, in addition to the first aspect, the reinforcing bar 46 is interposed between the packing box 28 and the front and rear brackets 29 and 30 in the vertical direction. The packing box 28, the front and rear brackets 29 and 30, and the reinforcing bar 46 are fastened together by fasteners 35.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a truck which is a vehicle, and an arrow Fr indicates the front thereof. The left and right described below refer to the vehicle width direction toward the front.

The vehicle body 2 of the truck 1 is made of sheet metal and includes a vehicle body frame 3 constituting a lower portion thereof, and a vehicle body body 4 constituting an upper portion and supported on the upper surface side of the vehicle body frame 3. Front and rear wheels 7, 8 are suspended from the vehicle body frame 3 via front and rear suspensions 6, and the vehicle body 2 is supported on a road surface 9 via these suspensions 6 and wheels 7, 8.

The vehicle body frame 3 includes a pair of left and right side frames 12 and 12 that form left and right sides and extend in the front-rear direction and have a box-shaped cross section, and front portions of the two side frames 12 and 12. A cross member 13 for connecting the members to each other; and a plurality (three) of cross members 14 to 16 before and after connecting the rear portions of the side frames 12 and 12 to each other.
Each extend in the vehicle width direction.

The vehicle body 2 has a driver's cab 19 at the front thereof. The cab 19 has an cab frame 20 constituting a lower portion thereof and an cab frame 20 constituting an upper portion thereof.
The cab frame 20 includes left and right side frames 12 and 12 at the front of the body frame 3 and a cross member 13. The inside of the cab main body 21 is an cab 22.

The vehicle body 2 is provided with a loading platform 26 at a rear portion thereof. The loading platform 26 includes a loading frame 27 forming a lower portion thereof, and a loading box 28 configuring an upper portion and supported on the upper surface side of the loading frame 27.
Are left and right side frames 1 at the rear of the body frame 3
2 and 12 and cross members 14 to 16. The loading platform 26 is provided with the side frames 12.
The rear brackets 29 and 30 are provided before the packing box 28 is placed at the protruding end of the packing box 28 so as to be supported and supported. Each of the front and rear brackets 29 and 30 has a bowl shape that opens downward,
No. 2 is spot-welded (x mark, the same applies hereinafter).

The packing box 28 includes a packing box body 32 opening upward, and a plurality of (four) cross members 33 and 34 attached to the lower surface of the bottom plate of the packing box body 32 by spot welding. Have. The cross members 33 and 34 extend in the vehicle width direction, each section has a substantially U-shaped cross section, and the packing box main body 32 is reinforced to firmly hold the shape.

When viewed from the side of the vehicle body 2, the cross members 33 and 34 protrude downward from the lower surface of the packing box body 32, and a plurality of (four) cross members 3
3, 34, the front two cross members 33, 33
Are mounted on the upper surfaces of the left and right front brackets 29 and 29 and the left and right rear brackets 30 and 30 and fastened by fasteners 35, respectively.
Further, the respective protruding ends of the two rear cross members 34, 34 are placed on the upper surface of the rear end of each of the side frames 12, and are directly fastened by other fasteners 36, respectively. Have been.

A circular opening 38 penetrating vertically is formed in the bottom plate portion of the packing box main body 32 above the fasteners 35 and 36, respectively.
Through the internal space of each of the cross members 33 and 34,
From the inside of the packing box main body 32, the fasteners 35, 3
6 can be tightened. An elastic rubber cap 39 is provided to close each of the openings 38 so as to be able to open and close.

A rear wheel 8 is provided at the rear of the side frame 12.
The suspension 6 is mounted on the rear portion of the side frame 12 via front and rear pivoting means 41 and 42 to support the rear wheel 8, and an elastic deformation of the leaf spring 43. And a cylinder-type shock absorber 44 for supporting the rear wheel 8 moving up and down with the side frame 12.

In the above case, the connection point of the suspension 6 with respect to the side frame 12, that is, the connection point of the front end of the leaf spring 43 via the front pivoting means 41 is the front and rear bracket 29 in the front-rear direction. , 30. The connection point of the shock absorber 44 to the side frame 12 is determined by the front and rear brackets 29 and 30.
Is located near the rear of the vehicle.

Therefore, the external force applied to the side frames 12 from the rear wheels 8 via the suspensions 6 is mainly applied to the portions of the side frames 12 around the front and rear brackets 29 and 30. Therefore, the bending amount of this portion tends to increase.

A reinforcing bar 46 is provided for connecting the protruding ends of the front and rear brackets 29 and 30 to each other. The reinforcing bar 46 is formed of a commercially available sheet metal flat bar having a rectangular shape that extends linearly in the front-rear direction and has a cross section in the front-rear direction that is long in the vehicle width direction, and has a simple shape.

According to the above structure, the side frame 12, the front and rear brackets 29, 30,
Thus, the frame structure is formed by the reinforcing bar 46, whereby the side frames 12 are effectively reinforced, that is, the carrier frame 27 is effectively reinforced.

In the above case, the reinforcing bar 46 merely connects the protruding end portions of the existing front and rear brackets 29, 30. This is achieved with a simple configuration as compared with providing a reinforcing material inside.

That is, according to the above-described embodiment, the reinforcement of the carrier frame 27 can be achieved effectively and with a simple structure.
Of each side frame 12 is prevented from being largely bent by an external force during the running of the truck 1, and stress concentration occurs at a joint portion between each side frame 12 and each end of the cross members 14, 15, and 16. Therefore, the damage to the carrier frame 27 is more reliably prevented, and the life is improved.

Further, as described above, since the reinforcing bar 46 is formed by simply connecting the protruding end portions of the existing front and rear brackets 29 and 30, the work for reinforcing the carrier frame 27 is performed in the following manner. Can be made from outside of the vehicle body 2,
This can be done very easily as compared to providing a reinforcing material inside the side frame 12.

Further, in the above configuration, the reinforcing bar 46 is interposed between the cross members 33 of the packing box 28 and the front and rear brackets 29, 30 in the vertical direction. Each cross member 33, front and rear brackets 29 and 30, and reinforcing bar 46 are connected to the fastener 3.
5 are integrally fastened together.

For this reason, the front and rear brackets 29, 3
In contrast, the fastener 35 for attaching each cross member 33 of the packing box 28 and the fastener 35 for attaching the reinforcing bar 46 are commonly used, and accordingly, the reinforcement of the carrier frame 27 is further improved. This can be achieved with a simple configuration.

In addition, the front and rear brackets 29, 30
On the other hand, since it is not necessary to set the mounting pieces for mounting the reinforcing bar 46 on the front and rear brackets 29 and 30, the work of reinforcing the carrier frame 27 is further facilitated.

Further, the reinforcing bar 46 can be attached to the bed 26 of the truck 1 whose molding has been completed. That is, the reinforcing bar 46 can be retrofitted, and the degree of freedom in workability when reinforcing the bed frame 27 is improved. I do.

Further, as described above, the two front cross members 33 of the packing box 28 project downward from the lower surface of the packing box main body 32, and their protruding end portions are the front and rear ends. The reinforcing bar 4 is placed on the upper surface of the projecting end of the bracket 29, 30 and between each cross member 33 of the packing box 28 and the front and rear brackets 29, 30.
6 with each cross member 33 of these packing boxes 28 interposed therebetween.
And the front and rear brackets 29, 30 and the reinforcing bar 46 are fastened together by the fastener 35, so that, when the vehicle body 2 is viewed from the side, the packing box body 32 of the packing box 28 and the cross members 33,
By the reinforcing bar 46, the side frame 12, the front,
Another framework structure to be laminated on the framework structure by the rear brackets 29, 30 and the reinforcing bar 46 is formed, that is, an upper and lower double frame structure is formed. While being further reinforced,
In addition to this, the packing box 28 is also effectively reinforced.

[0034]

The effects of the present invention are as follows.

According to a first aspect of the present invention, there is provided a load carrier frame comprising a load frame constituting a lower portion thereof and supported on a road surface via wheels, and a load box disposed above the load frame. The left and right side frames that constitute the left and right side portions and extend in the front-rear direction, a cross member that connects these side frames to each other, and the packing box that projects upward from each of the side frames and is mounted at the protruding end thereof. Before and after making it supportable, in a truck with a rear bracket,

A reinforcing bar is provided for connecting the protruding ends of the front and rear brackets to each other.

Therefore, when viewed from the side of the vehicle body, a frame structure is formed by the side frames, the front and rear brackets, and the reinforcing bars, whereby each of the side frames is effectively reinforced. Thus, the carrier frame is effectively reinforced.

In the above case, the reinforcing bar is provided before the existing bar.
Since the protruding ends of the rear brackets are simply connected, the above-described reinforcement of the carrier frame can be achieved with a simpler structure than providing a reinforcing material inside each of the side frames.

That is, according to the present invention, the reinforcement of the carrier frame is effectively achieved with a simple structure. As a result, each side frame of the carrier frame is subjected to an external force when the truck travels. , Is prevented from being largely bent, and stress concentration is prevented from being generated at a joint portion between each of the side frames and each end of the cross member, thereby improving the life of the carrier frame.

Further, as described above, since the reinforcing bar is formed by simply connecting the protruding end portions of the existing front and rear brackets, the work for reinforcing the carrier frame can be performed from outside the vehicle body. Therefore, compared to the case where a reinforcing material is provided inside the side frames, it is very easy.

According to a second aspect of the present invention, the reinforcing bar is interposed between the packing box and the front and rear brackets in the vertical direction, and the packing box, the front and rear brackets, and the reinforcing bar are connected. They are fastened together with fasteners.

For this reason, with respect to the front and rear brackets,
Since the fastener for attaching the packing box and the fastener for attaching the reinforcing bar are shared, the reinforcement of the carrier frame can be achieved with a simpler configuration.

Further, a mounting piece for mounting a reinforcing bar to the front and rear brackets is attached to the front and rear brackets.
Since it is not necessary to set the rear bracket, the work of reinforcing the carrier frame is further facilitated.

Further, the reinforcing bar can be attached to the bed of the truck whose molding has been completed, that is, retrofitting can be performed, and the degree of freedom in workability when reinforcing the bed frame is improved.

[Brief description of the drawings]

FIG. 1 is a partially enlarged partial sectional view of FIG. 2;

FIG. 2 is an overall side view of a truck.

FIG. 3 is a plan view of the vehicle body frame.

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Truck 2 Body 3 Body frame 8 Wheels 9 Road surface 12 Side frame 14 Cross member 15 Cross member 16 Cross member 26 Carrier 27 Carrier frame 28 Packing box 29 Front bracket 30 Rear bracket 32 Packing box main body 33,34 Cross member 35 Fastener 46 Reinforcement bar

Claims (2)

[Claims] 1. A loading platform comprising a loading frame constituting a lower portion thereof and supported on a road surface via wheels, and a loading box disposed above the loading frame, wherein the loading frame is disposed on each of right and left sides thereof. The left and right side frames which form a part and extend in the front-rear direction, a cross member which connects these side frames to each other, and which can protrude upward from each of the side frames, respectively, and can be supported by placing the packing box on the protruding end thereof A truck support structure having a reinforcing bar for connecting the protruding ends of the front and rear brackets to each other in a truck including a front bracket and a rear bracket. 2. In the vertical direction, the reinforcing bar is interposed between the packing box and the front and rear brackets, and the packing box, the front and rear brackets, and the reinforcing bar are fastened together by fasteners. The truck bed reinforcement structure according to claim 1.