JP2004237872A - Load carrying platform fastening structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a load carrying platform fastening structure for preventing a chassis frame from being curved and twisted at the time of loading a carrying load. <P>SOLUTION: The structure is equipped with the chassis frame 3 of a vehicle, the load carrying platform 6 which is installed above the chassis frame 3 and forms a floor outer frame 16 at the outer periphery, and a fastening member 21 connecting and fixing the chassis frame 3 and the floor outer frame 16. Since the chassis frame 3 is fixed to the floor outer frame 16 with the fastening member 21, the bending rigidity and torsional rigidity of the chassis frame 3 are improved, and the chassis frame can be prevent from being curved and twisted at the time of loading the carrying load. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a carrier fastening structure in which a carrier is provided on a chassis frame.
[Prior art]
[0002]
5 to 7 schematically show an example of a conventional truck. In the conventional truck 1 shown here, a vertical joist 4 and a horizontal joist 5 are provided on a chassis frame 3 at a rear portion of a cab 2. A box-shaped carrier 6 is mounted.
[0003]
The chassis frame 3 includes a pair of left and right side rails 7 extending in the vehicle front-rear direction, and a cross member 8 that connects the pair of left and right side rails 7. An engine 9 and a transmission 10 are provided below. Here, in FIG. 5, 11 indicates a tire, FA indicates a location of a front axle, RA indicates a location of a rear axle, and WBP indicates a predetermined position between wheelbases.
[0004]
The vertical joist 4 is arranged along the upper surface of the side rail 7, and the horizontal joist 5 arranged above the vertical joist 4 extends in the width direction of the vehicle so as to support the floor surface of the bed 6. And a plurality of them are arranged at predetermined intervals in the vehicle front-rear direction. Here, as shown in FIGS. 8 and 9, the side rail 7 and the vertical joist 4 are fastened at predetermined positions via the U-bolt 12 and the opposing bracket 13, and the vertical joist 4 and the horizontal joist 5 are connected. Are vertically fastened by bolts or the like (not shown). In FIG. 8, reference numeral 14 denotes a fixing member such as a washer for fixing the U bolt 12.
[0005]
The bed 6 forms a floor panel 15 laid on the horizontal joist 5 by bolting, a floor outer frame 16 formed on the outer periphery of the floor panel 15, a side wall 17 erected on the floor outer frame 16, and a roof. The upper surface 18 and the like are provided. Here, regarding the fastening structure from the side rail 7 to the loading platform 6, the following Patent Document 1 and the like are already known as prior art.
[0006]
[Patent Document 1]
JP 10-264848 A
[Problems to be solved by the invention]
However, when the load C is loaded on the loading platform 6 in such a conventional structure, as shown in FIG. 10, the predetermined position WBP between the wheel bases and the vehicle rear end portion 7A on the side rails 7 are bent downward, and Since the arrangement position RA of the vehicle front 7B and the rear axle on the rail 7 is bent upward, there is a problem that the side rails 7 are bent up and down as a whole, and the door opening / closing property is deteriorated. Further, the portion where the side rail 7 and the lateral joist 5 are fixed by the U bolt 12 and the counter bracket 13 tends to suppress the vertical bending of the side rail 7, but as shown in FIG. There is a problem that the outer end portion 5A in the vehicle width direction is curved downward. Further, when a force in the torsional direction acts on the chassis frame 3, the U-bolt 12 and the opposing bracket 13 have low rotational restraint, so that the loading platform 6 and the chassis frame 3 are distorted as shown in FIG. 12. Was. In particular, there is a problem in that the portion between the cab 2 having no cross member 8 and the carrier 6 due to the arrangement of the engine 9 and the transmission 10 has a low torsional rigidity. Furthermore, when the frame itself is reinforced to prevent the side rails 7 and the horizontal joist 5 from being bent or twisted, there is a problem that the weight is significantly increased.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a cargo bed fastening structure that prevents a chassis frame from bending when a load is loaded and prevents the chassis frame from being twisted.
[0009]
[Means for Solving the Problems]
Claim 1 of the present invention relates to a chassis frame of a vehicle, a carrier installed above the chassis frame and forming a floor outer frame on the outer periphery, and a fastening member for connecting and fixing the chassis frame and the floor outer frame. And a cargo bed fastening structure.
[0010]
According to a second aspect of the present invention, there is provided the cargo bed fastening structure according to the first aspect, wherein the horizontal joist, which is arranged on the upper portion of the chassis frame and forms the floor surface of the cargo bed, is connected to the fastening member.
[0011]
A third aspect of the present invention relates to the loading platform fastening structure according to the first or second aspect, wherein a fastening member is provided at a portion where a displacement amount of the chassis frame generated when a load is loaded on the loading platform is provided.
[0012]
According to a fourth aspect of the present invention, there is provided the load-bearing fastening structure according to the first or second aspect, wherein a fastening member is provided in a portion of the chassis frame where the amount of twist generated when the load is loaded on the load carrier is large.
[0013]
A fifth aspect of the present invention relates to the loading platform fastening structure according to the first, second or third aspect, wherein a fastening member is provided at an outer position of the rear axle.
[0014]
A sixth aspect of the present invention is directed to the loading platform fastening structure according to the first, second, or third aspect, wherein a fastening member is provided between the wheel bases.
[0015]
Claim 7 of the present invention relates to the cargo box fastening structure according to any one of Claims 1, 2 and 4, further comprising a fastening member in front of the vehicle on the cargo bed.
[0016]
According to claim 8 of the present invention, the fastening member includes a mounting seat attached to the chassis frame, and a reinforcing portion extending from the mounting seat to the floor outer frame. Structure.
[0017]
As described above, according to the first aspect of the present invention, since the chassis frame is fixed to the floor outer frame of the loading platform by the fastening member, the rigidity of the loading platform is used to improve the bending rigidity of the chassis frame, and when loading the load. , The curvature of the chassis frame can be sufficiently prevented, and as a result, the openability of the door can be improved. In addition, since the chassis frame is fixed to the outer frame of the floor by the fastening member to enhance the rotation restraint, the torsional rigidity of the chassis frame is improved to prevent the chassis frame from being twisted, and as a result, the stability of driving operation and the riding comfort are improved. Can be improved. Further, since the chassis frame and the floor outer frame are reinforced by the fastening members, it is not necessary to reinforce the frame itself, which significantly increases the weight, and it is possible to reduce the weight of the entire vehicle.
[0018]
As described in claim 2, when the horizontal joist arranged on the upper portion of the chassis frame and constituting the floor surface of the cargo bed is connected to the fastening member, the horizontal joist is fixed to the chassis frame by the fastening member, so that the bending of the horizontal joist is reduced. This can improve the rigidity of the floor of the cargo bed. In addition, since the horizontal joist is fixed to the chassis frame by the fastening member to enhance the rotation restraint, the torsional rigidity of the chassis frame is further improved, and the torsional of the chassis frame is reliably prevented. Riding comfort can be appropriately improved. Furthermore, since the lateral joists are reinforced by the fastening members, the reinforcement of the horizontal joists themselves, which significantly increases the weight, becomes unnecessary, and the weight of the entire vehicle can be reduced.
[0019]
According to a third aspect of the present invention, when a fastening member is provided at a portion where the displacement amount of the chassis frame generated when the load is loaded on the carrier, the fastening member connects the chassis to the floor outer frame at the portion where the displacement amount of the chassis frame is large. Since the chassis is fixed to the frame, it is possible to most appropriately prevent the chassis frame from being bent when a load is loaded.
[0020]
According to a fourth aspect of the present invention, when a fastening member is provided in a portion of the chassis frame where the amount of twist generated when the load is loaded on the loading platform is provided, the fastening member connects the chassis to the floor outer frame with the portion of the chassis frame where the amount of twist is large. Since it is fixed to the frame to increase the rotation restraint, the chassis frame can be most appropriately prevented from being twisted.
[0021]
According to a fifth aspect of the present invention, when a fastening member is provided at an outer position of the rear axle, the outer position of the rear axle where the rigidity of the floor surface of the loading platform is insufficient in the chassis frame is reinforced by the fastening member. The rigidity of the floor of the carrier together with the frame can be improved. Further, when a fastening member is provided between the wheel bases as in the sixth aspect, the wheel bases with insufficient rigidity of the floor surface of the loading bed in the chassis frame are reinforced by the fastening member in substantially the same manner as in the fifth aspect. Therefore, the rigidity of the floor of the cargo bed together with the chassis frame can be improved.
[0022]
According to a seventh aspect of the present invention, when a fastening member is provided in front of the loading platform in the vehicle, the torsional rigidity of the chassis frame is weakened in a vehicle forward portion of the loading platform, so that the torsional rigidity of the chassis frame is preferably improved. Can be.
[0023]
As shown in claim 8, when the fastening member is provided with a mounting seat attached to the chassis frame and a reinforcing portion extending from the mounting seat to the floor outer frame, the chassis frame is reinforced with a lightweight and simple structure, It is not necessary to reinforce the frame itself, which significantly increases the weight, so that the weight of the entire vehicle can be reduced and the manufacturing cost can be reduced.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
FIGS. 1 and 2 show a first embodiment of the present invention, in which the same reference numerals as in FIGS. 5 to 15 denote the same parts.
[0026]
The truck 1 using the first example of the carrier fastening structure includes a side rail 7 and a carrier 6 at a predetermined position WBP between the wheel bases of the pair of left and right side rails 7 and a rear axle arrangement position (outer position) RA. And a fastening member 21 for fastening the floor outer frame 16 and the horizontal joist 5. Here, it is preferable that the predetermined position WBP between the wheel bases is intermediate between the location FA of the front axle and the location RA of the rear axle.
[0027]
The fastening member 21 includes a plate-shaped mounting seat 22 that can be bolted to the side surface of the side rail 7, and a right-angled triangular plate-shaped reinforcing portion that fixes the lower surface of the floor outer frame 16 and the horizontal joist 5 to the mounting seat 22. 23, and a swash plate 24 that extends from the mounting seat 22 to the floor outer frame 16 and is connected to be positioned on the outer slope of the reinforcing portion 23. Here, the mounting seat 22, the reinforcing portion 23, and the swash plate 24 constituting the fastening member 21 may be any fixing means such as bolt fastening, welding, or may be an integral structure. Similarly, the side rail 7, the floor outer frame 16, and the horizontal joist 5 for the fastening member 21 may be any fixing means or may be an integrated structure.
[0028]
Hereinafter, the operation of the first embodiment of the present invention will be described.
[0029]
When the load C is loaded on the loading platform 6, the predetermined position WBP between the wheel bases on the side rails 7 and the vehicle rear end 7A bend downward, and the vehicle front 7B and the rear axle arrangement position RA bend upward. The force to be attempted is opposed by the reinforcing portion 23 of the fastening member 21 and the swash plate 24. Similarly, the reinforcing portion 23 of the fastening member 21 and the swash plate 24 counter the downward bending force of the lateral end 5A of the lateral joist 5 in the vehicle width direction.
[0030]
As described above, according to the first embodiment, the side rail 7 of the chassis frame 3 is fixed to the floor outer frame 16 of the bed 6 by the reinforcing portion 23 and the swash plate 24 of the fastening member 21. And the bending rigidity of the side rail 7 when the load C is loaded can be sufficiently prevented, and as a result, the openability of the door can be improved. The side rails 7 having a width smaller than that of the loading platform 6 are connected to the floor outer frame 16 of the loading platform 6 by the fastening members 21, thereby adding the rigidity of the loading platform 6 and the floor outer frame 16 to the rigidity of the entire chassis frame 3. Can be increased. Here, the rigidity of the loading platform 6 and the floor outer frame 16 is significantly greater than the rigidity of the side rails 7. In addition, since the fastening member 21 reinforces the chassis frame 3 and the floor outer frame 16, it is not necessary to reinforce the frame itself, which significantly increases the weight, so that the weight of the entire vehicle can be reduced.
[0031]
When the lateral joist 5 arranged above the side rails 7 of the chassis frame 3 and constituting the floor of the loading platform 6 is connected to the fastening member 21, the lateral joist 5 is fixed to the side rail 7 by the fastening member 21. The lateral joist 5 can be prevented from bending such that the outer end 5A of the thick 5 in the vehicle width direction is curved downward, and the rigidity of the floor surface of the loading platform 6 can be improved. In addition, since the lateral joist 5 is reinforced by the fastening member 21, it is not necessary to reinforce the lateral joist 5 itself, which significantly increases the weight, and the weight of the entire vehicle can be reduced.
[0032]
When the fastening member 21 is provided in a portion of the chassis frame 3 where the displacement amount of the side rail 7 generated when the load C is loaded on the loading platform 6 is provided, the fastening member 21 is provided in the portion where the displacement amount of the side rail 7 is large. Since the frame 3 is fixed to the floor outer frame 16 of the loading platform 6, the bending of the chassis frame 3 when the load C is loaded can be most appropriately prevented.
[0033]
When the fastening member 21 is provided at the outer positioning position RA of the rear axle, the positioning position RA of the side rail 7 where the rigidity of the floor surface of the loading platform 6 is insufficient is reinforced by the fastening member 21. The rigidity of the floor of the carrier 6 together with the frame 3 can be improved. Further, when the fastening member 21 is provided at a predetermined position WBP between the wheel bases in the side rails 7, the predetermined position WBP between the wheel bases having insufficient rigidity of the floor surface of the loading platform 6 is reinforced by the fastening member 21. The rigidity of the floor of the bed 6 can be improved together with the chassis frame 3. Here, if the predetermined position WBP between the wheel bases on which the fastening members 21 are arranged is between the front axle arrangement place FA and the rear axle arrangement place RA, it is more preferable that the chassis frame 3 and the floor surface of the bed 6 are more preferably arranged. The rigidity can be improved.
[0034]
When the fastening member 21 includes the mounting seat 22 to be attached to the chassis frame 3 and the reinforcing portion 23 extending from the mounting seat 22 to the floor outer frame 16, the fastening frame 21 reinforces the chassis frame 3 with a lightweight and simple structure. It is not necessary to reinforce the frame itself, which significantly increases the weight, so that the weight of the entire vehicle can be reduced and the manufacturing cost can be reduced. Further, when the fastening member 21 includes the swash plate 24, the chassis frame 3 is reinforced with a simpler structure, so that the manufacturing cost can be further reduced.
[0035]
FIG. 3 shows a second example of the embodiment of the present invention, and the portions denoted by the same reference numerals as those in FIGS. 5 to 15 represent the same components.
[0036]
The carrier fastening structure of the second example is a modification of the fastening member 21 of the first example, and the fastening member 26 of the second example provided at substantially the same location as the first example is bolted to the side surface of the side rail 7. It has a plate-shaped mounting seat 27 to be obtained, and a bar-shaped reinforcing portion 28 such as a square or pipe material for fixing the outer end 5A of the floor outer frame 16 and the horizontal joist 5 to the mounting seat 27. Here, the mounting seat 22 and the reinforcing portion 28 constituting the fastening member 26 may be any fixing means such as bolt fastening, welding or the like, or may be an integrated structure. Similarly, the side rail 7, the floor outer frame 16, and the horizontal joist 5 for the fastening member 26 may be any fixing means or may be an integrated structure.
[0037]
Hereinafter, the operation of the second embodiment of the present invention will be described.
[0038]
When the load C is loaded on the loading platform 6, the predetermined position WBP between the wheel bases of the side rails 7 and the vehicle rear end portion 7A bend downward, and the vehicle front 7B and the rear axle arrangement position RA bend upward. The force to be attempted is countered by the reinforcing portion 28 of the fastening member 26. Similarly, the reinforcing portion 28 of the fastening member 26 also counters the downward bending force of the lateral end 5A of the lateral joist 5 in the vehicle width direction.
[0039]
As described above, according to the loading platform fastening structure of the second example, since the side rails 7 are fixed to the floor outer frame 16 of the loading platform 6 by the reinforcing portions 28 of the fastening members 26, the rigidity of the loading platform 6 is used to make the side rails 7. And the bending rigidity of the side rail 7 when the load C is loaded can be sufficiently prevented, and as a result, the openability of the door can be improved. Further, the second embodiment of the present invention can provide the same operation and effect as the first embodiment.
[0040]
FIG. 4 shows a third example of an embodiment of the present invention, in which the parts denoted by the same reference numerals as those in FIGS.
[0041]
The third example of the carrier fastening structure is a modification of the arrangement of the fastening members 21 of the first example. The truck 1 in which the third example of the carrier fastening structure is used is located between the cab and the carrier 6. A fastening member 21 is provided at an end 6A of the loading platform 6 at the front of the vehicle. Here, in the third example, as in the first and second examples, the fastening members 21 and 26 are attached to the predetermined position WBP between the wheel bases of the pair of left and right side rails 7 and the arrangement position (outward position) RA of the rear axle. May be provided.
[0042]
Similar to the first example, the fastening member 21 fixes the plate-shaped mounting seat 22 that can be bolted to the side surface of the side rail 7 and the lower surface of the floor outer frame 16 and the horizontal joist 5 to the mounting seat 22. The vehicle includes a right-angled triangular plate-shaped reinforcing portion 23 and a swash plate 24 that extends from the mounting seat 22 to the floor outer frame 16 and is connected to the outer slope of the reinforcing portion 23. Here, the fastening member 21 may have substantially the same configuration as in the second example.
[0043]
Hereinafter, the operation of the third embodiment of the present invention will be described.
[0044]
When a force in the torsional direction acts on the chassis frame 3, it acts on a portion of the side rail 7 between the cab 2 having a low torsional rigidity and the carrier 6. The reinforcing member 23 and the swash plate 24 of the fastening member 21 located at the front end 6A oppose each other.
[0045]
As described above, according to the third embodiment of the carrier fastening structure, the side rails 7 are fixed to the floor outer frame 16 of the carrier 6 by the fastening members 21 to enhance the rotation restraint property, so that the torsional rigidity of the side rails 7 is improved. Thus, the side rail 7 can be prevented from being twisted, and as a result, the stability of driving operation and the riding comfort can be improved.
[0046]
When the lateral joist 5 which is arranged above the side rail 7 and forms the floor of the loading platform 6 is connected to the fastening member 21, the lateral joist 5 is fixed to the side rail 7 by the fastening member 21, and the rotation constraint is enhanced. Thus, the torsional rigidity of the side rails 7 is further improved, and the torsion of the side rails 7 is reliably prevented. As a result, the stability of driving operation and the riding comfort can be appropriately improved.
[0047]
When the fastening member 21 is provided in a portion of the side rail 7 where the amount of twist generated when the load C is loaded on the loading platform 6 is large, the fastening member 21 is connected to the side rail 7 in a portion where the amount of twist of the side rail 7 is large. 6 is fixed to the floor outer frame 16 to enhance the rotation restraint, so that the side rails 7 can be prevented from being twisted most appropriately.
[0048]
When the fastening member 21 is provided in front of the loading platform 6 in the vehicle, the vehicle front portion of the loading platform 6 (portion between the cab and the loading platform 6) where the torsion rigidity of the side rail 7 is weak is reinforced by the fastening component 21, so that the side rail 7 The torsional rigidity can be suitably improved.
[0049]
In addition, the carrier fastening structure of the present invention is not limited only to the above-described embodiment, and the positions of the fastening members are not limited to the above, and various other positions may be used without departing from the gist of the present invention. Of course, changes can be made.
[0050]
【The invention's effect】
As described above, according to the carrier fastening structure of the present invention, the chassis frame is fixed to the floor outer frame by the fastening member, so that the flexural rigidity of the chassis frame is improved by using the rigidity of the carrier, and the loading of the load is performed. The bending of the chassis frame at the time can be sufficiently prevented. At the same time, various excellent effects can be achieved, such as improving the torsional rigidity of the chassis frame to prevent the chassis frame from being twisted.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a first example of a carrier fastening structure of the present invention.
FIG. 2 is a schematic side view showing a first example of the carrier fastening structure of the present invention.
FIG. 3 is a schematic front view showing a second example of the carrier fastening structure of the present invention.
FIG. 4 is a schematic side view showing a third example of the carrier fastening structure of the present invention.
FIG. 5 is a side view showing the entire track.
FIG. 6 is a horizontal plan view showing a side rail of the truck.
FIG. 7 is a schematic front view showing a conventional carrier fastening structure.
FIG. 8 is a schematic front view showing a portion using a U-bolt in a conventional cargo bed fastening structure.
FIG. 9 is a schematic front view showing a part using a counter bracket in a conventional carrier fastening structure.
FIG. 10 is a schematic side view showing a state in which a side rail is curved in a conventional carrier fastening structure.
FIG. 11 is a schematic front view showing a state in which a horizontal joist is curved in the conventional cargo bed fastening structure.
FIG. 12 is a schematic front view showing a state in which the loading platform and the side rails are twisted in the conventional loading platform fastening structure.
3 Chassis frame 5 Horizontal joist 6 Loading platform 16 Floor outer frame 21 Fastening member 22 Mounting seat 23 Reinforcement part 26 Fastening member 27 Mounting seat 28 Reinforcement part C Load

Claims (8)

The vehicle comprises a chassis frame, a carrier installed above the chassis frame and forming a floor outer frame on the outer periphery, and a fastening member for connecting and fixing the chassis frame and the floor outer frame. Cargo fastening structure. 2. The cargo bed fastening structure according to claim 1, wherein a horizontal joist arranged on an upper portion of the chassis frame and constituting a floor surface of the cargo bed is connected to the fastening member. 3. The carrier fastening structure according to claim 1, wherein a fastening member is provided in a portion of the chassis frame where a displacement amount generated when the load is loaded on the carrier is large. 4. 3. The carrier fastening structure according to claim 1, wherein a fastening member is provided in a portion of the chassis frame where the amount of twist generated when the load is loaded on the carrier is large. 4. The carrier fastening structure according to claim 1, wherein a fastening member is provided at an outer position of the rear axle. 4. The carrier fastening structure according to claim 1, further comprising a fastening member between the wheel bases. 5. The carrier fastening structure according to claim 1, further comprising a fastening member in front of the carrier on the vehicle. The load carrier fastening structure according to any one of claims 1 to 7, wherein the fastening member includes a mounting seat to be attached to the chassis frame, and a reinforcing portion extending from the mounting seat to the floor outer frame.

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