JPH05278643A - Car body structure - Google Patents

Abstract

PURPOSE:To offset the upper and lower side faces of a back panel in the longitudinal direction with the strength kept by connecting a load carrying platform strength holding member to a position lower than the pillar step section of a cabin corner section, and connecting the front end of the load carrying platform to a position upper than the step section through a reinforcing member in a car bode of monocoque structure. CONSTITUTION:In a car body comprising a cabin and a load carrying platform C integrated in a body, in order to enlarge the effective space of both the cabin and the load carrying platform C, the lower side space 1b of a cabin back panel 1 is offsetted toward the front of the vehicle than the upper side face 1c of the panel 1. At the cabin part, a rear side pillar 4 is vertically erected, and at a position near a panel step section 1a, a pillar step section 4a is formed. At a position lower than the pillar step section 4a of a load carrying platform side panel 3, a side member 33 for holding the strength of the load carrying platform is extended in the longitudinal direction, and the front end of the side member 33 is connected to the rear side pillar 4. A position near the front end of the side member 33 and a position upper than the pillar step section 4a of the rear side pillar 4 are connected to each other through a gusset plate 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure in which a vehicle compartment and a luggage carrier behind it are integrally formed.

[0002]

2. Description of the Related Art Conventionally, a luggage carrier has been provided at the rear of a passenger compartment.
A so-called pickup body is known.
By the way, as a vehicle body having such a structure, a cargo bed is formed at the rear of the passenger compartment by being defined by a passenger compartment back panel,
A vehicle compartment side panel provided on a side surface of the vehicle compartment, a luggage carrier side panel provided on a side surface of the luggage carrier, a floor plate of the luggage carrier and the vehicle compartment back panel are joined to form a vehicle cabin and a luggage carrier integrally. For example, "New model car manual Sunny truck B122 type car (1989
Published by Nissan Motor Co., Ltd. in October)).

This structure is mainly applied to a vehicle having a so-called monocoque structure without a frame, and is advantageous in terms of weight reduction and size reduction. Moreover, weight reduction can improve fuel efficiency and size reduction. Cost reduction can be achieved.

[0004]

By the way, as described above, in the structure in which the luggage carrier is provided at the rear of the passenger compartment, the passenger compartment back panel is desired to be disposed as rearward as possible in order to improve the passenger's indoor environment. In order to secure a sufficient loading capacity of the luggage carrier, it is desired to arrange the vehicle compartment back panel, which is the front end of the luggage carrier, as early as possible. Therefore, the vehicle compartment back panel, the upper side surface is arranged as rearward as possible to secure the space of the vehicle compartment, while the lower surface side is arranged as front as possible to secure the loading space of the luggage carrier. It is conceivable to offset the upper and lower side surfaces back and forth.

Therefore, in the vehicle body structure in which the vehicle interior back panel is joined to the pillar, the vehicle interior back panel and the pillar are reasonably joined to each other. Therefore, the pillar also corresponds to the shape change of the vehicle interior back panel. It is necessary to provide a step.

However, as described above, in the vehicle body structure in which the passenger compartment and the luggage carrier are integrated, the weight and inertial force of the luggage acting on the luggage carrier due to the vertical vibration during traveling are input from the luggage carrier to the pillars. Therefore, as described above, when the upper and lower side surfaces of the vehicle interior back panel and the upper and lower portions of the pillar are offset in the front-rear direction, the shape change portion (step portion) for this offset is formed. The stress concentrates on this part and this part is easily damaged.

Therefore, in the case of performing the offset as described above, it is necessary to moderate the shape change. However, if the vehicle interior back panel is offset with a gradual change in shape, the front surface of the luggage carrier will be formed to be inclined, so the luggage compartment back will be formed before the luggage loaded on the luggage carrier reaches the front edge of the luggage carrier floor. It abuts on the panel and it is not possible to load luggage up to the front end of the cargo bed, so the cargo bed cannot be substantially expanded, and even in the passenger compartment,
Only near the top of the cabin can the cabin space be effectively expanded. As described above, it was not possible to actually achieve the expansion of the loading platform and the expansion of the passenger compartment at the same time.

The present invention has been made in view of the above-mentioned problems, and in a vehicle body in which a vehicle compartment and a cargo bed are integrally formed, the effective space of the vehicle compartment is expanded rearward and the cargo bed is effectively It is an object of the present invention to provide a vehicle body structure that has high strength and is hard to be damaged even when an input is applied from the luggage carrier to the passenger compartment while expanding the space forward.

[0009]

In order to achieve the above-mentioned object, in the vehicle body structure of the present invention, a cargo bed is formed at the rear of the passenger compartment by being defined by a passenger compartment back panel, and a side surface of the passenger compartment is formed. A passenger compartment side panel provided in, a cargo bed side panel provided on a side surface of the cargo bed, and a floor plate of the cargo bed,
In a vehicle body structure in which the vehicle interior back panel is joined and the vehicle interior and the luggage carrier are integrally formed, pillars are vertically provided upright in a corner portion formed by the vehicle interior side panel and the vehicle interior back panel. The passenger compartment back panel has a panel step portion formed near the upper end of the cargo bed side panel, and a lower side surface that is disposed below the panel step portion and forms a front end surface of the cargo bed is the panel. It is arranged offset to the front of the vehicle from the upper side surface arranged on the upper side of the step portion, and the pillar is also in the vicinity of the panel step portion according to the shape change of the vehicle interior back panel,
Pillar step portions that change shape are formed so that the lower side portion is arranged in front of the upper side portion, and a loading platform strength holding member that holds the strength of the loading platform is provided on the loading platform side panel more than the stepped portions. Extending in the front-rear direction at a low height, the front end of the load carrier strength member is joined to the pillar at a position lower than the pillar step portion, and a position near the front end of the load carrier strength holding member and the pillar step portion of the pillar. The upper side position is connected via a reinforcing member.

[0010]

When the input transmission is performed between the luggage carrier and the vehicle compartment (especially, the transmission is mainly from the luggage carrier to the vehicle compartment direction), such as during traveling or collision, the luggage carrier strength holding member And the pillars are communicated. At this time, since the load carrier strength holding member is directly coupled to the pillar at a position lower than the pillar step portion, input transmission is directly performed during this time, but the position above the pillar step portion of the pillar and the load bed strength holding member are maintained. Between the member and the member, it is indirectly performed via the reinforcing member.

As described above, input transmission is performed between the pillar and the bed strength holding member, which are high in strength, between the passenger compartment and the bed, and the pillar is rearward in the portion above the pillar step portion. Since it is offset, even if there is a sudden shape change in the passenger compartment back panel, that is, a stepped portion is provided, stress concentration is prevented at this portion, sufficient strength is obtained, and repeated from the usual loading platform. The passenger compartment back panel is less likely to be damaged during input or collision.

Further, even in the pillar, a pillar step portion is provided, and the shape is such that stress is easily concentrated on this portion. The pillar step portion is sandwiched between the pillar and the carrier strength holding member. Since the reinforcing member is provided between them, stress concentration can be suppressed and high rigidity can be obtained.

As described above, even if the panel step portion is formed in the vehicle interior back panel and the upper side surface and the lower side surface of the back panel are largely offset, the vehicle interior back panel is not damaged, and therefore the luggage carrier is not damaged. The floor panel can be effectively used by the above-mentioned offset, and the vehicle compartment space can be effectively expanded by widening it from a portion immediately above the panel step.

[0014]

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

First, the configuration of the embodiment will be described. FIG. 2 is a side view showing the outer appearance of a vehicle to which the embodiment structure is applied, which is defined by a passenger compartment back panel 1 behind a passenger compartment R where a driver's seat (not shown) is provided. C is formed. Then, a vehicle compartment side panel 2 forming a side surface of the vehicle compartment R and a luggage carrier side panel 3 configuring a side surface of the luggage carrier C are integrally formed, that is, the vehicle cabin side panel 2 and the luggage carrier side. The outer surface of the panel 3 is composed of one fender panel FP.

A door 22 is provided on the vehicle compartment side panel 2, and a fitting and closing window 23 is provided above the rear position of the door 22.

The floor panel 31, which forms the floor surface of the cargo bed C, has its front edge joined to the passenger compartment back panel 1 by welding.

Next, the connecting structure of the back panel 1, the passenger compartment side panel 2, and the luggage carrier side panel 3 will be described.

FIG. 3 is a perspective view from the rear of the connecting portion of the vehicle interior back panel 1 and the luggage carrier side panel 3. The luggage carrier side panel 3 is, as shown in the drawing, the fender panel FD
And the inner panel 32 are joined together to form a closed cross-section structure.

A side member (load carrier strength holding member) 33 for holding the strength of the cargo carrier side panel 3 is formed along the upper end of the cargo carrier side panel 3. That is, the side member 33 is the fender panel F.
The upper end portion of P is bent toward the center of the loading platform C, and the tip side thereof is bent downward to form a substantially L-shaped channel shape, and the inner panel 32 is also formed into a substantially L-shaped channel shape. It is formed by spot-welding these layers.

The side member 33 is connected to a rear pillar 4 provided inside a corner formed by the vehicle interior back panel 1 and the vehicle interior side panel 2. In describing the joint structure, first, the passenger compartment back panel 1 will be described. As shown in FIG. 1, which is a side view for explaining the embodiment structure, the passenger compartment back panel 1 is described.
Is a lower side surface that forms a panel step portion 1a at a height near the upper end of the cargo bed side panel 3 and is arranged below the panel step portion 1a, and forms a front end surface of the cargo bed C. 1b is arranged offset to the front of the vehicle with respect to an upper side surface 1c arranged above the panel step portion 1a. The lower side surface 1b is formed vertically.

Returning to FIG. 3, the upper side surface 1 of the passenger compartment back panel 1
A flange 1d for the window opening 24 is formed in c. 1E indicated by a dotted line in the drawing is an opening 2 for a window.
4 is a rail provided to increase the strength, and both left and right ends thereof are joined to the rear pillar 4. The rear pillars 4 are erected on the left and right ends of the vehicle interior back panel 1 immediately in front of them. That is, the rear pillar 4 is joined to the inner panel 41 and the outer panel 42 with the flange 4d to form a closed cross section. Also,
On the rear surface of the rear pillar 4, a pillar step portion 4a is formed at a position corresponding to the panel step portion 1a.
The rear pillar 4 is formed so that the upper side is thicker than the pillar step portion 4a and the rear end surface 4 lower than the pillar step portion 4a.
b is disposed in front of the vehicle with respect to the upper rear end surface 4c (see FIG. 1). Then, as shown in FIG. 1, the upper ends of the rear pillars 4 are joined to the rear end portions of the roof side rails 7 extending in the front-rear direction at the left and right ends of the roof of the vehicle compartment R, while the rear The lower end of the side pillar 4 is joined to a side sill (not shown). Further, a front pillar 8 is erected in front of the rear pillar 4 across the window 23,
The front pillar 8 also has an upper end coupled to the roof side rail 7 and a lower end coupled to a side sill (not shown). In addition,
The left and right ends of the lower side surface 1b of the passenger compartment back panel 1 are
The rear pillar 4 is joined to the lower rear end face 4b, the upper side face 1c is joined to the fender panel FP at both left and right ends, and the flange 1d is joined to the inner panel 41 and the outer panel 42 at the flange 4d. ing. That is, the vehicle interior back panel can be joined along the rear end surfaces 4b and 4c of the rear pillar 4, which is very rational.

Then, as described above, the front end of the side member 33 is bolted and welded to the rear end surface 4b of the rear pillar 4 constructed as described above, which is located below the pillar step 4a. Are combined. Further, a gusset plate (reinforcing member) 5 is further set in order to increase the rigidity of this connecting portion.

As shown in FIG. 3, the gusset plate 5 is formed in a substantially U shape and is arranged along the upper side of the front end portion of the side member 33 so that the side member 33 can be moved from the left and right sides. Base part 5 joined by sandwiching
a and a standing wall 5b of a substantially triangular shape which is erected from the base portion 5a and whose front end is in contact with the rear end surface of the rear pillar 4.
And flanges 5c, 5c formed on the left and right of the front end of the standing wall 5b so as to face the front of the vehicle and joined to the rear end surface 4b, 4c across the pillar step 4a with respect to the rear pillar 4. Is equipped with.

As shown in FIG. 4, which is a sectional view taken along the line S4-S4 in FIG. 1, the standing wall 5b is formed into a closed cross section by two plates. Further, this gusset plate is used for the fender panel F as shown in FIG. 3 and FIG.
In a corner portion formed by P and the vehicle interior back panel 1, a patch panel 6 provided so as to be continuous between the two is covered and hidden.

Next, the operation of the embodiment will be described.

A) At the time of loading luggage When loading luggage on the loading platform C, if the loading is such that the panel step portion 1a does not reach the floor panel 31 of the loading platform C, the front end of the floor panel 31 is completely filled. Can be loaded into. In this state, the luggage is brought into contact with the lower side surface 1b of the passenger compartment back panel 1 and no wasted space is generated.

The upper side surface 1c above the panel step portion 1a of the vehicle interior back panel 1 is offset behind the lower side surface 1b and can be used as the vehicle interior R up to the front surface. The offset space can be used, for example, as a space for reclining a sheet (not shown).

B) When traveling, such as when traveling or in a collision, the loading platform C and the passenger compartment R
A case in which input transmission is performed between and will be described.

When a load is loaded on the loading platform C, the inertial force of the load acts on the loading platform C. In particular, during a sudden braking or a frontal collision, such an inertial force of the luggage is transmitted from the luggage carrier C to the front of the vehicle body. Also, when driving on rough roads, there is vibration or twisting,
The impact input to the luggage carrier C is transmitted from the luggage carrier C to the front of the vehicle body.

In such a case, the input to the cargo bed C is transmitted from the side member 33, which is a strength member in the cargo bed C, to the rear pillar 4. At this time, with respect to the rear pillar 4, it is directly transmitted from the front end of the side member 33 to a position lower than the pillar step portion 4a of the rear pillar 4 or via the gusset plate 5 to the pillar step portion 4a.
It may be indirectly transmitted to a position higher than a.

In this way, when the input is transmitted from the side member 33 to the rear pillar 4, it is transmitted above and below the pillar step portion 4a, so that stress concentration is unlikely to occur in the pillar step portion 4a, and the rear side pillar 4a is less likely to be concentrated. Pillar 4 is difficult to deform.

As described above, since the input transmission from the cargo bed C to the front of the vehicle is made between the rear pillar 4 and is difficult to be transmitted to the vehicle interior back panel 1, in the vehicle interior back panel 1 Even if the panel step portion 1a undergoes a sudden shape change, this portion is unlikely to be deformed or damaged. That is, because of this, in the present embodiment, the offset amount between the lower side surface 1b and the upper side surface 1c of the passenger compartment back panel 1 is set to be large, and the lower side surface 1b is raised vertically from the floor panel 31. It has become possible to form into different shapes.

Further, in the embodiment, the front pillar 8 is provided upright in front of the rear pillar 4 adjacent to the rear pillar 4.
When the rigidity of the vehicle body is further improved and the rear pillar 4 and the rear portion of the vehicle compartment R are less likely to be deformed by the input from the cargo bed C, and when an extremely large impact is input at the time of a collision, It is possible to prevent the deformation on the door D side by deforming between the pillars 8 and 4 to absorb the shock.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific structure is not limited to this embodiment. For example, the reinforcing member may be a strength holding member on the cargo bed side and a pillar (rear side). The shape and the connecting position of the pillar are not limited to those shown in the embodiment (gusset plate) as long as they are connected to the upper side of the pillar step portion of the pillar. Further, in the embodiment, an example in which the side member as the load carrier strength holding member is directly connected to the pillar (rear pillar) is shown, but this connection may be indirectly performed via a bracket or the like.

Although the reinforcing member is connected only to the rear pillar in the embodiment, it may be connected to both the rear pillar and the vehicle interior back panel.

Further, since the window is opened in the passenger compartment back panel, the rail 1E is provided to secure the strength, but it is not essential, and it is abolished when the window is not opened to further expand the effective space of the passenger compartment. Can contribute.

[0038]

As described above, in the vehicle body structure of the present invention, the pillars are erected at the corners of the passenger compartment, and the load carrier strength holding member is provided directly above or below the pillar step portion or through the reinforcing member. Since the pillar step portion and the panel step portion are formed between the upper and lower portions to which the cargo bed reinforcing member is joined, stress concentration does not easily occur at each step portion, and the rigidity of the pillar and the vehicle interior back panel is improved. It is possible to improve the offset amount and the shape change between the lower side surface and the upper side surface of the passenger compartment back panel.
The effect that the expansion of the effective space of the luggage carrier and the expansion of the effective space of the vehicle compartment can be achieved at the same time is obtained.

Further, since the pillar on the rear side is formed with a pillar step portion which changes according to the shape of the vehicle interior back panel, and the upper portion thereof is offset rearward, along the rear end surface of the pillar, Since the vehicle interior back panel can be joined, the rigidity of the vehicle interior back panel can be improved and the vehicle interior back panel can be closed in the vehicle width direction when it is desired to increase the rigidity by opening a window in the vehicle interior back panel. Even if a rail forming a cross section is provided, the left and right end portions of the rail can be directly joined to the pillars, so that the rigidity can be ensured and the specifications can be easily accommodated.

[Brief description of drawings]

FIG. 1 is a side view showing a vehicle body structure according to an embodiment of the present invention.

FIG. 2 is a side view showing the appearance of an automobile to which the structure of the embodiment is applied.

FIG. 3 is a perspective view showing a main part of the embodiment structure.

4 is a cross-sectional view showing a main part of the embodiment structure taken along line S4-S4 in FIG.

[Explanation of symbols]

 R vehicle compartment C luggage carrier 1 vehicle compartment back panel 1a panel step portion 1b lower side surface 1c upper side surface 2 vehicle compartment side panel 3 luggage carrier side panel 31 floor panel (floor plate) 33 side member (carrying strength holding member) 4 rear pillar 4a pillar Step portion 5 Gusset plate (reinforcing member)

Claims (1)

[Claims] 1. A luggage compartment is formed at the rear of the passenger compartment by a passenger compartment back panel, and a luggage compartment side panel is provided on a side surface of the compartment, and a luggage carrier side is provided on a side surface of the luggage compartment. In the vehicle body structure in which the panel, the floor plate of the luggage carrier, and the vehicle interior back panel are joined, and the vehicle interior and the luggage carrier are integrally formed, in a corner portion formed by the vehicle interior side panel and the vehicle interior back panel. , Pillars are erected vertically, and the vehicle interior back panel is disposed below the panel step portion sandwiching a panel step portion formed near the upper end of the luggage platform side panel, and the front end surface of the luggage platform is disposed. A lower side surface forming the panel is offset from the upper side surface located above the panel step portion toward the front of the vehicle, and the pillar also corresponds to the panel change according to the shape change of the vehicle interior back panel. Pillar step portions that change shape are formed in the vicinity of the step portion so that the lower portion is arranged in front of the upper portion, and the loading platform side panel includes a loading platform strength holding member that holds the loading platform strength. , Extending in the front-rear direction at a height lower than each of the step portions, the front end of the load carrier strength member is coupled to the pillar at a position lower than the pillar step portion, and a position near the front end of the load carrier strength holding member. The vehicle body structure, wherein the pillar is connected to a position above the pillar step portion via a reinforcing member.