JP2013244777A - Freight-vehicle deck structure - Google Patents

Abstract

An object of the present invention is to provide a deck structure for a freight vehicle that suppresses the occurrence of cracks due to an external force in the peeling direction of a spot hitting portion of a deck floor panel with respect to a sill cross at the end of a cross member without using a conventional reinforcing plate or the like.
A step-shaped portion is provided in a flange portion 8d of a sill cloth 8 so that first to third spot hit points S1, S2, S3 in the step portions 8da, 8db, 8dc are equally spaced three-dimensionally from the mount portion 9. The external force in the peeling direction input from the mount unit 9 is evenly distributed and received.
[Selection] Figure 3

Description

  The present invention relates to a structure of a cargo vehicle deck called a pickup, for example.

In a freight vehicle (truck, pickup) having a cabin (crew compartment) at the front of the vehicle and a deck (loading platform) behind the cabin, a plurality of cross members straddling between the left and right side frames that support the engine, suspension, etc. And a deck structure in which a deck floor panel is coupled to the upper surface. Various techniques relating to such a deck structure are disclosed in the following patent documents.
As shown in FIG. 5, in the conventional deck structure, among the plurality of cross members that support the floor panel 12 of the deck 10, the frontmost cross member 13 closest to the cabin has a sill cloth as a reinforcing member at its left and right ends. 14, and the floor panel 12 may be coupled along the upper surface of the cross member 13 through the sill cloth 14. In this case, the ends of the sill cloth 14 and the cross member 13 are connected to mounting parts 11a provided on the left and right side frames 11 and 11 by connecting bolts 11b, respectively, and to the upper surface flange parts 14a and 14b of the sill cloth 14. The floor panel 12 is spot-welded at the spot hitting points D1 and D2 and joined.
In such a deck structure, vibration (external force) such as road noise during vehicle travel is applied as an external force in the peeling direction to the spot hitting points D1 and D2 through the side frames 11 and the mounts 11a. For this reason, by adding a spot hitting point D3 with a reinforcing plate 15 called a shear patch interposed between the conventional sill cloth 14 and the floor panel 12, the stress concentration on the spot hitting point D1 is dispersed. By extending the upper surface flange portion 14b and adding a spot hitting point D4, the stress concentration on the spot hitting point D2 is dispersed, thereby improving the durability of the spot hitting point D1, D2 against external force in the peeling direction. Measures were taken to prevent cracks.

Japanese Patent Laid-Open No. 11-34930 Japanese Utility Model Publication No. 6-57769 JP 2000-85636 A Japanese Utility Model Publication No.7-111488

As described above, in the conventional countermeasure, the reinforcing plate 15 is added to the spot spot D1 on the rear side with respect to the mount portion 11a to add the spot spot D3, and the sill cloth 14 is added to the spot spot D2 on the front side. The front upper surface flange portion 14b is extended to add the spot hitting point D4, and the cost increases due to the addition of the reinforcing plate 15 and the spot hitting point portions D3 and D4, and the weight increases accordingly. There was an increasing problem.
An object of the present invention is to increase the bonding strength of a spot hitting portion to a sill cloth of a floor panel and, in turn, a cross member without incurring an increase in cost or weight due to the addition of members.

The above problem is solved by the following invention.
The first invention is a structure in which a sill cloth is joined to the end of a cross member joined between the left and right side frames of the freight vehicle, and the floor panel of the deck is joined by spot welding along the upper surface of the sill cloth. The upper surface of the sill cloth is formed in a stepped shape that gradually decreases toward the inner side in the vehicle width direction, and at least two spot hitting points that join the floor panel to each of the stairs parts are formed on the sill cloth. The deck structure is arranged three-dimensionally at equal intervals with respect to a mount portion that is a coupling portion to the side frame.
According to the first invention, when viewed in a two-dimensional manner, the spot hitting portion can be arranged closer to the mount portion, so that there is no need to add another member such as the conventional reinforcing plate 15 or the like. The external force input through the mount can be received evenly distributed to the spot hit points, and as a result, the bond strength of each spot hit point is increased and the occurrence of cracks is suppressed without increasing the weight and cost. can do.
According to a second invention, in the first invention, the floor panel is joined by spot welding to the first to third step portions of the sill cloth having different heights, and the first to third steps. This is a deck structure in which first to third spot hitting points with respect to the portion are three-dimensionally arranged at equal intervals.
According to the second aspect of the invention, external forces such as vibrations input through the mount portion are evenly distributed by the first to third spot hitting points arranged at three-dimensionally equal intervals with respect to the mount portion. Therefore, these three spot hitting portions can be arranged closer to the mount portion in a plan view, and without using a separate member such as a conventional reinforcing plate, Generation of cracks can be suppressed.
A third invention is a deck structure according to the first or second invention, wherein the floor panel and the wheel house are coupled to the highest step portion of the sill cloth.
According to the third invention, since the external force such as road noise inputted through the mount part is received on the wheel house side as well, durability of the spot hitting part of the floor panel against the sill cloth is further enhanced. Can do.

It is a top view of a cargo vehicle. It is a left view of a deck. It is the (III) part enlarged view of FIG. 1, Comprising: It is a top view of the left front part of the deck which concerns on the deck structure of this embodiment. FIG. 4 is a cross-sectional view taken along line (IV)-(IV) in FIG. It is a longitudinal cross-sectional view of the mount part which concerns on the conventional deck structure.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 show a freight vehicle 1 also called a pickup. The cargo vehicle 1 includes a deck (loading platform) 3 behind the cabin 2.
The deck 3 is mounted on the left and right side frames 4, 4 and has an open bottomed shallow box shape having side walls on four sides of the deck floor. Wheel houses 5 are respectively provided in front portions of the left and right side wall portions. Left and right rear wheels (not shown) are arranged inside the wheel houses 5 and 5.
Between the left and right side frames 4, 4, a plurality of cross members 6 to 6 are coupled in a spanning state. A floor panel 7 constituting a deck floor is coupled to the plurality of cross members 6 to 6. Reinforcing members referred to as so-called sill crosses 8 are respectively attached to the left and right ends of the cross member 6 in the foremost row closest to the cabin 2. Hereinafter, unless otherwise specified, when the cross member 6 is simply referred to, it means the front row cross member. 3 and 4 show details of how the floor panel 7 is coupled to the sill cloth 8 at the left and right ends of the cross member 6. FIG. The present embodiment to be described below has an unprecedented feature regarding the structure for connecting the floor panel 7 to the sill cloth 8. Since such a coupling structure is configured symmetrically, the left coupling structure will be described below as shown in FIGS.

The sill cross 8 has a generally U-shaped cross section having a bottom portion 8a and front and rear side wall portions 8b, 8c, and the end of the cross member 6 is in contact with the upper surface of the bottom portion 8a and received from below. It is coupled to the end of the cross member 6. As shown in FIG. 4, the bottom portion 8a of the sill cloth 8 and the lower surface of the cross member 6 are coupled to the mount portion 9 provided on the upper surface of the side frame 4 by coupling bolts 9a. Are coupled to the side frame 4. An external force F (vibration, etc.) such as road noise while the vehicle is running is input to the cross member 6 through the mount portion 9 as indicated by the white arrow in the drawing, and is added to the floor panel 7 as a thrust force from below. Is done.
A rear flange portion 8 d that protrudes rearward is provided on the upper portion of the side wall portion 8 c on the rear side of the sill cloth 8. The rear flange portion 8d is formed in a stepped shape that gradually decreases toward the inner side in the vehicle width direction. In the present embodiment, the rear flange portion 8d is formed in a staircase shape that gradually decreases in three stages. The highest first staircase portion 8da is provided at the left end portion of the rear flange portion 8d. A second step portion 8db that is one step lower is provided on the right side of the first step portion 8da. A third step portion 8dc that is one step lower is provided on the right side of the second step portion 8db.

The floor panel 7 is connected to the first to third stepped portions 8da, 8db, 8dc of the rear flange portion 8d of the sill cloth 8 by spot welding. In the present embodiment, the left and right corners of the front portion of the floor panel 7 are missing in a rectangular shape, and the sub-floor panel 7 a that compensates for this missing portion is coupled to the sill cloth 8. The sub-floor panel 7a is identified as a part of the floor panel 7 and is simply referred to as a floor panel 7 hereinafter. Therefore, as shown in FIG. 4, the portion of the sub-floor panel 7a overlapped with the rear flange portion 8d of the sill cloth 8 is formed in a step shape along the first to third step portions 8da, 8db, 8dc. .
The floor panel 7 is spot welded to the first staircase portion 8da at the first spot hitting portion S1, spot welded to the second staircase portion 8db at the second spot hitting portion S2, and to the third staircase portion 8dc. Then, spot welding is performed at the third spot hitting portion S3. In FIG. 3 and FIG. 4, each spot hitting point S1, S2, S3 is marked with a circle. The other spot welds are marked with x.

The first staircase portion 8da is joined to the left edge side of the sub-floor panel 7a and the flange portion 5a of the wheel house 5 at the first spot hitting portion S1. Further, the third staircase portion 8dc is joined to the right end portion of the sub-floor panel 7a and the edge portion of the missing portion of the floor panel 7 by the third spot hitting portion S3.
The spot positions of the first to third spot hit points S1, S2, S3 are equally spaced three-dimensionally with respect to the mount portion 9 (joint portion by the joining bolt 9a) that is a joint portion of the sill cloth 8 to the side frame 4. Is set (three-dimensional equidistant arrangement of spot hitting points). For this reason, the external force F input to the sill cloth 8 through the mount portion 9 is evenly distributed and added to the first to third spot hitting portions S1, S2, S3, and stress concentration to a specific portion is avoided. As a result, the coupling strength of the first to third spot hit points S1, S2, S3 with respect to the external force F in the peeling direction is relatively increased, and the occurrence of cracks is suppressed.
The structure on the left side of the deck described above is configured symmetrically on the right side.

According to the deck structure of the present embodiment configured as described above, the first to third spot hit points S1, S2, and S3, which are spot welded portions of the floor panel 8 with respect to the sill cloth 8, are input portions of the external force F. The three-dimensional distance from the mount portion 9 is set at a site where the distances are equal to each other (equal intervals). For this reason, since the external force F is equally received by the first to third spot hitting portions S1, S2, and S3 and stress concentration on the specific portion is avoided, the first to third spot hitting portions S1, The relative bond strength of S2 and S3 can be increased, thereby suppressing the occurrence of cracks in the first to third spot hit points S1, S2 and S3.
As described above, the configuration is such that the external force F is received in a distributed manner by adding a reinforcing member or adding a spot hitting part to a part further away from the mount part by extending the flange part or the like. According to the deck structure, a step-shaped portion is provided on the rear flange portion 8d of the sill cloth 8, and the distances from the mount portions 9 of the spot hit points S1, S2, S3 at the respective step portions 8da, 8db, 8dc are three-dimensionally equidistant. Since the external force F can be evenly distributed and received by arranging them evenly, the conventional reinforcing plate 15 is abolished and the extension of the flange portion is omitted without incurring an increase in weight and cost. Generation of cracks at the spot hitting point can be suppressed.
In addition, since the external force F can be uniformly distributed and efficiently received by the first to third spot hitting points S1, S2, and S3, spot welding points in other parts can be omitted, which is also costly. Can be reduced.

  Furthermore, when it is a flat rear flange portion that does not have a staircase shape as exemplified, the spot hitting point portion located behind the mount portion in plan view is changed to a spot hitting point portion located further inside in the vehicle width direction. On the other hand, in order to arrange them equidistantly when viewed two-dimensionally, it is necessary to arrange the spot hitting points behind the former mount part more rearward, and as a result, the overhang dimension of the rear flange part of the sill cloth is made larger. There is a problem that the yield deteriorates. On the other hand, in the illustrated embodiment, the first spot hitting point S1 behind the mount part is arranged above the third spot hitting point S3 on the inner side in the vehicle width direction by the stepped shape portion, and is viewed three-dimensionally. By setting the distances to be equal to each other, it is possible to achieve the same effect (equal addition of external force) without increasing the overhanging dimension of the rear flange 8d, thereby improving the yield of the sill cloth 8. become.

Various modifications can be made to the embodiment described above. For example, the first to third spot hit points S1, S2, and S3 are exemplified by the three-dimensional equidistant distance from the mount unit 9, but at least two spot hit points are three-dimensionally equivalent. By disposing at a distance, the conventional reinforcing plate 15 is abolished, and the external force F is evenly distributed and added to the at least two spot hitting points without extending the flange portion of the sill cloth. Generation of cracks can be suppressed.
Moreover, although the structure (3 sheet | seat coupling | bonding) which couple | bonded both the floor panel 7 (subfloor panel 7a) and the flange part 5a of the wheel house 5 with respect to the 1st step part 8da by 1st spot hitting part S1, wheel was illustrated. About the flange part 5a of the house 5, it is good also as a structure couple | bonded with another site | part.
Furthermore, the configuration (three-sheet coupling structure) in which the right side portion of the sub-floor panel 7a that compensates for the missing portion of the floor panel 7 and the missing edge portion of the floor panel 7 are joined to the third staircase portion 8dc by the third spot hitting portion S3. However, if it is a one-piece floor panel that does not have such a missing portion, a two-sheet coupling structure in which the one-piece floor panel is coupled to the third stepped portion 8dc can be obtained.

1. Cargo vehicle 2. Cabin (passenger room)
3 ... Deck
4 ... side frame 5 ... wheel house, 5a ... flange 6 ... cross member 7 ... floor panel, 7a ... sub-floor panel 8 ... sill cloth 8a ... bottom, 8b ... front side wall, 8c ... back side wall, 8d ... back flange 8da ... 1st staircase part, 8db ... 2nd staircase part, 8dc ... 3rd staircase part 9 ... Mount part, 9a ... Coupling bolt S1 ... 1st spot hitting part, S2 ... 2nd spot hitting part, S3 ... 3rd spot RBI 10 ... Deck (conventional)
DESCRIPTION OF SYMBOLS 11 ... Side frame, 11a ... Mount part, 11b ... Coupling bolt 12 ... Floor panel 13 ... Cross member 14 ... Sill cross, 14a, 14b ... Flange part 15 ... Reinforcement plate D1-D4 ... Spot hitting part (conventional)

Claims (3)

A sill cloth is coupled to the end of a cross member coupled between the left and right side frames of the cargo vehicle, and the deck floor panel is coupled by spot welding along the upper surface of the sill cloth,
The upper surface of the sill cloth is formed in a staircase shape that gradually decreases toward the inner side in the vehicle width direction, and at least two spot hitting points that join the floor panel to the respective stairs parts are formed on the sill cloth. A deck structure that is three-dimensionally arranged at regular intervals with respect to a mount portion that is a coupling portion to the side frame.   2. The deck structure according to claim 1, wherein the floor panel is coupled to the first to third stepped portions having different heights of the sill cloth by spot welding, the first to third steps. A deck structure in which first to third spot hitting points with respect to a staircase are three-dimensionally arranged at equal intervals. The deck structure according to claim 1 or 2, wherein the floor panel and the wheel house are coupled to the highest stepped portion of the sill cloth.

Images