JP2860903B2 - Truck cab structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab structure for a truck.

[0002]

2. Description of the Related Art A cab of a truck needs to have a predetermined rigidity so that the cab is not greatly deformed by an external force applied thereto. For this reason, the plate thickness of each element constituting the cab is set to be sufficiently large and the rigidity is increased, but if the plate thickness of each element of the cab becomes too large, the total weight of the cab increases, and The disadvantage of rising costs is inevitable. Therefore, when designing a cab, it is important to ensure sufficient stiffness of the cab, to set the thickness of each element as thin as possible, and to reduce the cost and weight.

[0003] From such a viewpoint, the present inventor examined the details of the relationship between the rigidity of each element constituting the cab and its plate thickness while repeating various experiments. As a result, the following new facts could be clarified.
FIGS. 1 to 6 show one embodiment of the present invention.
Is a cross-sectional view showing a conventional example. The new fact described above will be described in detail with reference to FIGS. 1 to 5 and FIG. 7 among these figures.

FIG. 1 is a perspective view of a cab 1 of a truck to which fittings such as window glass and doors have not yet been mounted, as viewed obliquely from the rear, and FIG. 2 is indicated by reference numeral II in FIG. FIG. 2 is a partial perspective view of the cab 1 when viewed from the interior side of the cab. In these figures, the arrow X indicates the forward direction of the completed truck, the arrow W indicates the width direction of the cab 1, and the arrow Y indicates the vertical direction of the cab 1.

[0005] Here, "front" or "rear" in the present specification is based on the forward direction X of the truck, and "left" or "right" is the "left" or "right" in the width direction W of the cab 1. Left and right. The illustrated cab 1 is configured symmetrically in the left-right direction as viewed in the forward direction X of the track, and therefore, in the following description, only one of the left and right configurations may be described.

The cab 1 shown in FIGS. 1 and 2 has a roof panel 2 forming a ceiling plate at the upper part of a cabin, a back panel 3 located at a rear part of the cabin, and a floor panel 4 forming a floor plate of the cab. And front pillars 5 located on the left and right of the front of the passenger compartment and quarter pillars 6 located on the left and right of the rear of the passenger compartment
And A back window (not shown) is fitted and fixed to an upper edge 7 of the back panel 3 and an opening 8 defined by the left and right quarter pillars 6 and the like, and left and right defined by the front pillar 5 and the quarter pillar 6 and the like. Each of the door openings 9 is provided with a door (not shown).

FIG. 3 shows the upper edge 7 of the back panel 3.
FIG. 4 is a horizontal cross-sectional view of a quarter pillar portion higher than the upper pillar portion taken along the line III-III of FIG. 1. FIG. 4 shows a quarter pillar portion lower than the upper edge 7 of the back panel 3 in FIG.
It is the horizontal sectional view cut | disconnected along the IV-IV line.

As shown in FIGS. 2 to 4, the quarter pillar 6 has a quarter inner panel 10 extending substantially in the vertical direction of the cab 1, and is located outside the cabin of the panel 10.
And a quarter outer panel 11 extending substantially in the vertical direction of the cab 1.
0, the rear end 10a of the cab is fixed to the end 3a in the cab width direction of the back panel 3 by spot welding as shown in FIG. In addition, the quarter outer panel 11 also has a cab rear side end
As shown in FIG. 3, the cab rear end 10a of the quarter inner panel 10 and the cab width direction end 3 of the back panel 3 are provided.
The quarter outer panel 11 forms a quarter pillar 6 together with the quarter inner panel 10.

On the other hand, as shown in FIGS. 5 and 2, which are sectional views taken along the line VV of FIG. 1, a back panel reinforcing plate 12 extending in the width direction of the cab 1 The upper and lower flange portions 12b and 12c of the back panel reinforcing plate 12 are in close contact with the back panel 3, and these flange portions 12b and 12c are spot-welded to the back panel 3. The back panel reinforcing plate 12 cooperates with the back panel 3 to form a tunnel-shaped closed section. The cab width direction end 12a of the back panel reinforcing plate 12 is integrally fixed to the cab rear end 10a of the quarter inner panel 10 by spot welding as shown in FIG.

Further, as shown in FIGS. 2 to 4, a quarter pillar reinforcing plate 13 extending substantially vertically in the cab 1 is disposed in a space defined by the quarter inner panel 10 and the quarter outer panel 11. This reinforcing plate 1
3 is a cab front end 1b of the quarter inner panel 10 and the quarter outer panel 11.
0b and 11b, and are integrally fixed thereto by spot welding.

FIG. 7 is a cross-sectional view showing a conventional configuration example when the quarter pillar 6 is cut at the height level at which the back panel reinforcing plate 12 is located.
It is a view corresponding to a line sectional view, and as can be seen from this figure, the rear end 13 of the quarter pillar reinforcing plate 13 on the cab side.
The part 13A of the back panel reinforcing plate 12 facing the cab width direction end 12a is separated from the quarter inner panel 10 and the quarter outer panel 11, and a gap G is formed between them.

On the other hand, as shown in FIGS. 3 and 4, the rear end 13a of the quarter pillar
A portion 13B of the back panel reinforcing plate 12 excluding a portion facing the cab width direction end 12a is a cab rear side end 1 of the quarter inner panel 10 and the quarter outer panel 11.
0a, 11a, and are integrally fixed to them by spot welding.

As described above, the illustrated cab structure has its rigidity because the back panel 3 is reinforced by the back panel reinforcing plate 12 and the quarter pillar 6 is reinforced by the internal quarter pillar reinforcing plate 13. And the thickness of each element can be made relatively thin.

However, when the present inventor studied the above-described cab structure in detail, it was found that the portion 13A of the cab rear side end portion 13a of the quarter panel reinforcing plate 13 facing the cab width direction end portion 12a of the back panel reinforcing plate 12. Is located away from the quarter inner panel 10 and the quarter outer panel 11, so that it is clear that the rigidity at this portion is lower than that of the other portion 13B. Conventionally, the entire thickness of the quarter pillar reinforcing plate 13 is set to be large to compensate for the decrease in rigidity of the portion 13A. However, the above-described elements constituting the cab 1 generally have a large weight per unit volume. Therefore, if the thickness of the quarter pillar reinforcing plate 13 is set to be large, it is inevitable that the weight of the entire cab increases significantly.

In order to increase the rigidity of the back panel reinforcing plate 12, portions 12d other than the upper and lower flange portions 12b and 12c are separated from the back panel 3 (see FIGS. 5 and 7). A cab rear side end 10a of the quarter inner panel 10 is overlapped and fixed to an outer surface of the quarter inner panel 10. In this region, the cab rear end portions 10a and 11a of the quarter inner panel 10 and the quarter outer panel 11 are separated from each other, and the separated cab rear end portion 1 of the quarter pillar reinforcing plate 13 is provided at the separated portion.
The portion 13A of 3a is located. Therefore, the portion 13A of the end portion 13a also has the cab rear end portions 10a, 1 of the quarter inner panel 10 and the quarter outer panel 11.
1a. As a result, the rigidity of the portion 13A decreases, and the quarter pillar reinforcing plate 13
Had to be made thicker.

Portion 1 of quarter pillar reinforcing plate 13 facing cab width direction end 12a of back panel reinforcing plate 12
Similarly to the other portion 13B, 3A may be fixed to the quarter inner panel 10 or the quarter outer panel 11 by spot welding to increase its rigidity. However, in this case, the quarter pillar reinforcing plate 13 The shape of the portion 13A must be rapidly changed with respect to the other portion 13B. However, press forming the quarter pillar reinforcing plate 13 so that only a part of the shape of the quarter pillar reinforcing plate 13 suddenly changes as described above generally causes a crack or the like in the changed portion. Impossible.

[0017]

SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned novel recognition. It is an object of the present invention to provide a quarter pillar reinforcing plate having a predetermined thickness even if it is set thinner than a conventional one. It is an object of the present invention to provide a cab structure that can secure the rigidity of the cab.

[0018]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a back panel located at a rear portion of a vehicle cabin, a vehicle extending in a width direction of a cab, and being fixed to a side surface of the vehicle interior above a back panel. A back panel reinforcing plate cooperating with the back panel to form a closed cross section, a quarter inner panel fixed to an end portion of the back panel in a cab width direction and extending substantially in a vertical direction of the cab, and a vehicle of the quarter inner panel. A quarter outer panel, which is located on the outdoor side and extends substantially in the vertical direction of the cab, is fixed to the quarter inner panel and the back panel, and constitutes a quarter pillar together with the quarter inner panel, a quarter inner panel and a quarter outer panel. A quarter pillar reinforcing plate disposed in the space configured and extending substantially in the vertical direction of the cab. The cab front end portion of the quarter pillar reinforcing plate is sandwiched between the cab front end portions of the quarter inner panel and the quarter outer panel and is integrally fixed thereto, and among the cab rear end portions of the quarter pillar reinforcing plate, The portion facing the cab width direction end of the back panel reinforcing plate is separated from the quarter inner panel and the quarter outer panel, and the portion of the cab rear side end of the quarter pillar reinforcing plate excluding the facing portion is the quarter inner panel. In the cab structure of a truck which is sandwiched and integrally fixed to the cab rear end of the quarter outer panel, in the cab rear end of the quarter pillar reinforcing plate opposed to the cab width direction end of the back panel reinforcing plate. Near the cab front end of the quarter pillar reinforcement plate corresponding to this part and the quarter pillar reinforcement plate. Strong plate in cooperation with Suggest cab structure of a track which is fixed a reinforcing panel which constitutes a closed cross section.

[0019]

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

The basic structure of the cab structure in this embodiment is the same as that of the conventional example shown in FIGS. 1 to 5 and 7, and the description of the same components as those in the conventional example is omitted. For details, see FIGS. 1 to 5 and 7 and the above description.

The difference from the prior art is that the cab structure shown in FIG. 7 is different from the cab structure shown in FIG. 2 and FIG.
At a portion 13A of the back panel reinforcing plate 12 facing the cab width direction end 12a and a corresponding 13C near the cab front end of the quarter pillar reinforcing plate 13, a reinforcing panel 14 made of, for example, a steel plate The point is that they are integrally fixed by welding. That is, the cab rear side end portion 13A of the quarter pillar reinforcing plate 13 facing the cab width direction end 12a of the back panel reinforcing plate 12.
And a portion 13C near the cab front end of the quarter pillar reinforcing plate 13 corresponding to the portion 13A and at substantially the same height level as the portion 13A, and a cab rear end 14a of the reinforcing panel 14 and a cab front side. The end 14b is integrally fixed. With such a configuration, the reinforcing panel 14 forms a closed cross section in cooperation with the quarter pillar reinforcing plate 13, whereby the rigidity of this portion can be significantly increased. Other configurations are the same as the conventional cab structure.

As described above, in the cab structure of the present embodiment, the portion where the rigidity may have been reduced in the past is intensively reinforced by the reinforcing panel 14 and the rigidity is increased, so that the thickness of the quarter pillar reinforcing plate 13 is increased. Can be given a predetermined rigidity to the cab 1 even if is set thinner than before. Moreover, the reinforcing panel 14 is not provided over the entire length of the quarter pillar reinforcing plate 13, but is provided in a part thereof, that is, a portion 13A and a region 13C near the cab front end portion of the quarter pillar reinforcing plate 13 corresponding thereto. , The weight of the cab does not increase, and the weight of the entire cab can be effectively reduced. The cab front end 14b of the reinforcing panel 14 may be fixed to the quarter pillar reinforcing plate 13 at the cab front end 13b of the reinforcing plate 13 or a quarter near the end 13b. It may be a part of the pillar reinforcing plate 13. Alternatively, the cab front end 14b of the reinforcing panel 14 may be fixed to both the cab front end 13b and the quarter pillar reinforcing plate portion near the end 13b. As described above, the vicinity of the cab front side end of the quarter pillar reinforcing plate 13 to which the cab front side end 14b of the reinforcing panel 14 is fixed is the cab front side end 13b of the quarter pillar reinforcing plate 13 and the quarter near the cab front side end 13b. This means any part of the area including the pillar reinforcing plate portion.

The present invention can be applied to a cab structure of a truck having a shape other than the illustrated shape.

[0024]

According to the present invention, the stiffness of the cab can be increased by an extremely simple structure in which the reinforcing panel is fixed to a part of the quarter pillar reinforcing plate, and therefore, the plate of the quarter pillar reinforcing plate is provided. The thickness can be set to be thinner than before without any problem. Thereby, the weight of the cab can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a cab used for describing an embodiment of the present invention and a conventional example.

FIG. 2 is a partial cross-sectional perspective view of the cab shown in FIG. 1 when viewed from the vehicle interior side.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 1;

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 1;

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 1;

FIG. 7 is a sectional view similar to FIG. 6, showing an example of a conventional cab structure.

[Explanation of symbols]

 Reference Signs List 1 cab 3 back panel 3a cab width direction end 6 quarter pillar 10 quarter inner panel 10a cab rear end 10b cab front end 11 quarter outer panel 11a cab rear end 11b cab front end 12 back panel reinforcing plate 12a End portion in cab width direction 13 Quarter pillar reinforcing plate 13a End portion on cab rear side 13b End portion on cab front side 13A portion 13B portion 13C vicinity 14 Reinforcement panel

Claims (1)

(57) [Claims] 1. A back panel located at a rear portion of a passenger compartment,
A back panel reinforcing plate that extends in the width direction of the cab and is fixed to the interior side of the upper part of the back panel and forms a closed cross section in cooperation with the back panel; and is fixed to an end of the back panel in the cab width direction. A quarter inner panel extending substantially in the vertical direction of the cab, and a quarter inner panel located outside the cabin of the quarter inner panel, extending substantially in the vertical direction of the cab, and fixed to the quarter inner panel and the back panel. A quarter pillar outer panel forming a quarter pillar together with the panel; and a quarter pillar reinforcing plate disposed in a space formed by the quarter inner panel and the quarter outer panel and extending substantially in the vertical direction of the cab. The front end of the cab is the cab of the quarter inner panel and the quarter outer panel. The rear end of the cab of the quarter pillar reinforcement plate, which is opposed to the cab width direction end of the back panel reinforcement plate, is a quarter inner panel and a quarter outer panel. The cab rear side end portion of the quarter pillar reinforcing plate, apart from the opposed portion, is sandwiched between the quarter inner panel and the cab rear side end of the quarter outer panel, and is integrally fixed to the truck. In the cab structure, the quarter pillar reinforcing plate opposing the cab width direction end of the back panel reinforcing plate and the cab front end of the quarter pillar reinforcing plate corresponding to this portion have a quarter quarter. A cab structure for a truck, wherein a reinforcing panel having a closed cross section is fixed in cooperation with a pillar reinforcing plate.