JP3856677B2 - Connection structure between wall and floor constituting box-type cargo bed - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting structure of a front wall portion and a rear wall portion constituting a box-type cargo bed and a floor portion, and in particular, a wall portion of a box-type cargo bed in which an L-shaped roof is symmetrically pivoted. And the floor connecting structure.
[0002]
[Prior art]
FIG. 1 shows a perspective view of a typical box-type carrier 1 having a so-called wing-type roof 2 with a pivoted cross-section L-shaped. In this loading platform 1, a front wall portion 4 is vertically provided in front of the floor portion 3, and a rear wall portion 5 is vertically provided behind the floor portion 3. The front wall 4 is on the driver's seat side of the vehicle and is entirely covered with a panel. The rear wall portion 5 is usually provided with a gate door 6 on a gate-shaped frame member.
[0003]
A central beam 7 is passed over the front wall 4 and the rear wall 5, and a wing roof 2 is symmetrically pivoted to the central beam 7. On both sides of the loading platform 1, pivots 8 are pivotally attached, and together with the wing type roof 2, the side openings can be opened and closed.
[0004]
FIG. 2 shows a perspective view of the front wall 4 that is partly cut out and is assembled to the floor 3. As shown in FIG. 2, the front wall portion 4 has frame members 22 and 23 provided vertically on both sides of a horizontal skeleton member 21 constituting the lower end, and an auxiliary frame member 24 provided therebetween. (Although not shown, an upper frame member is provided on the upper part of the frame member), and panels 25 are attached to the front and rear of the frame member. A central beam 7 (shown by a broken line in the figure) is attached to the top of the front wall 4.
[0005]
Further, a floor member 26 that is integrated with the skeleton member 21 and that constitutes an end portion of the floor portion 3 is provided vertically. The floor member 26 is fixed vertically to a vertical joist described below. At both ends of the floor member 26, connectors 27 and 28 for connection with the floor 3 are fixed.
[0006]
FIG. 3 shows a perspective view of the rear wall 4 assembled to the floor 3. As shown in FIG. 3, the rear wall 4 is provided with a gate-shaped frame member 30 on a horizontal skeleton member (not shown) constituting the lower end, and the door 6 can be opened and closed there. Is attached. A central beam 7 (shown by a broken line in the figure) is attached to the top of the rear wall 5.
[0007]
As in the case of the front wall portion, the skeleton member of the rear wall portion 5 is integrally provided with a floor member 26 ′ that constitutes an end portion of the floor portion 3 vertically. This floor member 26 'is also fixed vertically to a vertical joist described below. At both ends of the floor member 26 ′, connecting tools 27 ′ and 28 ′ for connecting to the floor portion 3 are fixed.
[0008]
FIG. 4 shows an exploded perspective view for connecting the floor 3 and the wall 4 (same for the wall 5). The floor portion 3 has two parallel vertical joists 31 (only one is shown in the figure) and a plurality of floor members 32 perpendicular thereto fixed by bolts via a connector. Flooring is stretched over it.
[0009]
A floor frame member 33 (only one side is shown in the figure) is arranged on both sides of the floor 3, and the floor member 32 is fixed to the floor frame member 33 and the end of the floor frame member 33 is also fixed. The portion and the connecting tool 27 fixed to the floor member 26 are also fixed by tightening with a rivet by aligning a plurality of holes provided in them. Bolts and nuts are also used in addition to rivets, but such means for fastening and fixing are collectively referred to as fasteners.
[0010]
FIG. 5 shows a state in which the floor member 26 and the floor frame member 33 are fastened and fixed by the rivets 34 via the coupling tool 27. In the prior art, the rivets 34 are positioned in the vicinity of the upper edge (upper surface) of the floor frame member 33 so as to draw a straight line at equal intervals. The number of rivets is determined by the size of the wall and floor.
[0011]
[Problems to be solved by the invention]
In this way, by connecting the floor frame material arranged on the side surface of the floor portion 3 and the floor member connected to the wall portion by a fastener such as a rivet, the box-shaped cargo bed shown in FIG. Although it is formed, the wall portion receives a force that swings back and forth (around the assumed center of rotation shown in FIG. 5) due to vibration during traveling of the vehicle or opening and closing operation of the roof. Therefore, stress is generated at each position of each rivet.
[0012]
FIG. 8 shows the stress generated in the connecting structure between the wall and the floor, and the generated stress is shown by color shading and lattice deformation (the stress at each rivet is a number). As shown in the existing arrangement (as shown in FIG. 5, when the rivets are positioned at equal intervals so as to draw a straight line in the vicinity of the upper edge of the floor frame material), The closer to the edge of the material, the greater the stress generated. As described above, when the stress is non-uniform, the floor frame material and the floor member may be deformed at the position of the rivet where the stress is large, which sometimes causes a crack.
[0013]
Therefore, the present invention has been made to solve such a problem, and in the connection structure between the wall portion and the floor portion constituting the box-type cargo bed, the stress in the fastener that fastens and fixes both is more uniform. It aims at providing the connection structure by which the fastener is arrange | positioned in the position which becomes.
[0014]
Another object of the present invention is to provide such a connection structure without changing the structure of the wall and floor of the prior art.
[0015]
[Means for Solving the Problems]
The coupling structure of the present invention that achieves the above object is a box-type cargo bed that includes a floor portion, and a front wall portion and a rear wall portion that are connected to the front and rear of the floor portion. It is a connected structure. The wall has a horizontal skeleton member at the lower end, the floor has a plurality of floor members fixed vertically to the vertical joists, and a floor frame material that extends to the entire length on both sides. , Having an upper edge along the longitudinal direction and an edge forming an end. The skeleton member of the wall is integrated with the floor member at the end. The end portion of the floor frame member is connected to the side surface of the floor member integrated with the skeleton member by fastening means for fastening at a plurality of locations. One of the two fastening means is located closer to the upper edge of the floor frame material than the other fastening means, but the other fastening means is closer to the floor than one fastening means. It is in a position close to the edge of the frame material.
[0016]
One or more fastening means may be located between one fastening means and the other connecting means. Here, the position of the fastening means located in between becomes gradually lower than the position of one fastening means as it approaches the other fastening means.
[0017]
【Example】
6 shows an exploded partial enlarged perspective view of a connecting structure with rivet positions arranged according to the present invention, and FIG. 7 shows a partially enlarged side view of the connecting structure with rivet positions arranged according to the present invention. .
[0018]
The present invention relates to a connection structure between a wall and a floor constituting a box-type carrier, and is otherwise the same as the above-described prior-art box carrier, and therefore, common elements have the same reference numerals. Is attached.
[0019]
The connecting structure of the present invention shown in FIG. 6 and the connecting structure of the prior art shown in FIG. 4 are basically the same except for the arrangement of rivets. That is, the floor 3 has two parallel vertical joists 31 (only one is shown in the figure) and a plurality of floor members 32 perpendicular to the floor joists 31 that are fixed by bolts via a connecting tool. Flooring is stretched over it. A floor frame member 33 (only one side is shown in the figure) is arranged on both sides of the floor 3, but the floor member 32 is fixed to the floor frame member 33 and the end portion of the floor frame member 33 The connecting device 27 fixed to the floor member 26 is also fastened and fixed by rivets by aligning a plurality of holes provided in them.
[0020]
As shown in FIG. 7, the floor member 26 and the floor frame member 33 are fastened and fixed by rivets 61-65 via a connector 27. The position of the rivet is exactly the feature of the present invention. Become.
[0021]
The rivet according to the present invention is such that one of the rivets (indicated by reference numeral 61) is closer to the upper edge (upper surface) of the floor frame material than the other rivet (indicated by reference numeral 64). However, the other rivet 64 is located closer to the edge of the floor frame member than the one rivet 61. And there are a plurality of other rivets 62, 63 that pass through the rivet 61 and are required on a straight line parallel to the upper edge. The other rivet 65 required is positioned between one rivet 61 and the other rivet 64.
[0022]
The position of the rivets arranged in this way can be characterized by a line segment passing through them. That is, the rivets 61, 62, and 63 are in the vicinity of the upper edge of the floor frame material and are in a straight line, whereas the rivets 64, 65, and 61 are closer to the (front) edge of the floor frame material. It is on an inclined line segment that descends as it goes. This inclined line segment can be a straight line or can be curved.
[0023]
The stress generated in the joint structure between the wall and floor (floor frame) joined by rivets can be obtained analytically, and the result is shown visually in FIG. It is shown together with the stress value at the position of each rivet due to shading and lattice deformation.
[0024]
As shown in FIG. 8 (arrangement of the present invention), in accordance with the present invention, the rivet is arranged so that the line segment passing through the rivet inclines downward as it approaches the edge of the floor frame ( By arranging), the stress at each rivet is almost balanced.
[0025]
The rivet positions in the embodiments of FIGS. 6 to 8 are merely examples, and the actual number of rivets and their positional relationship are structural analysis based on the materials, dimensions, bed size, etc. of the elements constituting the joint structure. In the prior art, the number of rivets and their positional relationship were determined on the premise that the line segment that always penetrates the rivet was a straight line in the prior art. As the edge of the material is approached, the structure is analyzed so as to incline downward, and the number of individual rivets suitable for the connecting structure and the positional relationship are determined.
[0026]
【effect】
According to the present invention, the coupling of the wall portion and the floor portion where the position of the fastening means is determined so that the rivet, that is, the line segment passing through the fastening means, is inclined downward as it approaches the edge of the floor frame material. In the structure, the stress generated in each fastening means is balanced, and as a result, it is possible to prevent the elements constituting the wall portion and the floor portion from being effectively deformed or cracked.
[Brief description of the drawings]
FIG. 1 shows a perspective view of a box-type cargo bed having a wing-type roof.
FIG. 2 is an enlarged perspective view of a front wall portion constituting the box-type carrier of FIG.
FIG. 3 is an enlarged perspective view of a rear wall part constituting the box-type carrier of FIG. 1;
FIG. 4 shows an exploded partial enlarged perspective view of a connecting structure with rivet holes arranged in a straight line according to the prior art.
FIG. 5 shows a partially enlarged side view of a connection structure with rivets arranged in a straight line according to the prior art.
FIG. 6 shows an exploded partial enlarged perspective view of a connecting structure with rivet holes arranged in accordance with the present invention.
FIG. 7 shows a partially enlarged side view of a connecting structure with rivets arranged according to the present invention.
FIG. 8 shows the stress generated in each of the connecting structure of the wall portion and the floor portion (floor frame material) when the position of the rivet is according to the prior art and according to the present invention. Shown together with stress values at each fastener position due to color shading and lattice deformation.
[Explanation of symbols]
21 Frame members
26 Floor material
27 coupling
31 Vertical joists
32 Floor frame material

Claims (3)

In a box-type carrier (1) having a floor (3) and a front wall (4) and a rear wall (5) connected to the front and rear of the floor,
A connecting structure of the floor (3) and the wall (4, 5) ,
The wall (4, 5) has a horizontal skeleton member (21) at the lower end,
The floor portion (3) has a plurality of floor members (26) fixed vertically to the vertical joists (31 ) , and a floor frame member (33) extending to the entire length on both sides,
The floor frame member (33) has an upper edge along the longitudinal direction and an edge forming an end,
The wall skeleton member (21) is integrated with the floor member (26) at the end,
End portions of the floor frame member (33) are connected to side surfaces (27, 28) of the floor member integrated with the skeleton member by fastening means that are fastened at a plurality of locations.
One fastening means (61) of the two fastening means (61 to 65) is located closer to the upper edge of the floor frame member than the other fastening means (64) , the other fastening means (64) than said one of the fastening means (61), Ri position near close to the said end edge portion of the floor frame member,
One or more fastening means (65) are located between the one fastening means and the other connecting means ,
The position of the fastening means (65) positioned in between is gradually lower than the position of the one fastening means (61) as it approaches the other fastening means (64) .
A connecting structure characterized by that. The connection structure according to claim 1 ,
The connecting structure in which a line passing through the one fastening means (61) , the fastening means (65) positioned between the fastening means (65) and the other fastening means (64) is a straight line. The connection structure according to claim 1 ,
A connecting structure in which a line segment passing through the one fastening means (61) , the fastening means (65) positioned between the fastening means (65) and the other fastening means (64) is curved.

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