JP3346694B2 - Cabin rear structure of cab-over type car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear part of a cab-over type vehicle in which a rear part of a floor panel, a reinforcing panel extending along a lower surface of the rear part of the floor panel, and a lower part of a back panel are connected to each other. is there.

[0002]

2. Description of the Related Art A cabin rear structure of a cab-over type vehicle is disclosed in Japanese Utility Model Laid-Open No. 15793/1991.

According to this, a floor panel that forms the lower surface of the vehicle compartment and supports the seat on the upper surface, a reinforcing panel extending in the left-right direction along the rear lower surface of the floor panel,
And a back panel extending upward from the rear side of the floor panel.

In the above case, the reinforcing panel has a front edge joined to a portion forward of a rear edge of the floor panel and a rear edge of the reinforcing panel joined to a lower edge of the back panel. I have. The rear edge of the floor panel is joined to a portion above the lower edge of the back panel and joined by spot welding. Thereby, the rear portion of the floor panel, the reinforcing panel, and the lower portion of the back panel are joined to each other, and the side section of the joining portion is box-shaped, so that the strength of the joining portion is improved. I have.

[0005]

By the way, in the above-mentioned conventional technique, the joint between the rear edge of the floor panel and the back panel is formed at a portion above the lower edge of the back panel. When attempting to spot-weld the joint, a large-sized welding gun is required to bypass the lower edge of the back panel, and thus there is a problem that the work for the spot welding becomes complicated.

Therefore, the front and rear edges of the reinforcing panel are joined to the rear of the floor panel so that the side cross sections of the rear of the floor panel and the reinforcing panel are box-shaped, so that the rear of the floor panel and the reinforcing panel are reinforced. It is conceivable to spot-weld the front edge of the panel and spot-weld the lower edge of the back panel to the joint between the rear edge of the floor panel and the rear edge of the reinforcing panel.

In this case, the joints of the rear edge of the floor panel, the rear edge of the reinforcing panel, and the lower edge of the back panel, which are joined and spot-welded, are all edges. The spot welding is accomplished by a small-sized welding gun, and the above problem is considered to be solved.

However, with the above configuration, the gap between the rear part of the floor panel and the lower part of the back panel is located above the rear part of the floor panel and on the space side in front of the lower part of the back panel. It becomes a bottomed space with the joint part by spot welding as the bottom.

For this reason, the vehicle body including the rear part of the floor panel, the reinforcing panel, and the connection part of the "three members" at the lower part of the back panel is to be subjected to electrodeposition coating, and this is temporarily deposited in the electrodeposition liquid tank. When immersed in the liquid, the electrodeposition liquid hardly flows into the gap, and when the vehicle body is taken out of the electrodeposition liquid tank thereafter, the electrodeposition liquid once entering the gap is removed from the gap. It is not discharged smoothly,
The electrodeposition coating on the inner surface of the gap may be complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and includes a rear part of a floor panel, a reinforcing panel extending along a lower surface of a rear part of the floor panel, and a "three members" at a lower part of a back panel. It is an object of the present invention to facilitate this joining operation when joining each other by spot welding.

It is another object of the present invention to facilitate electrodeposition coating of a vehicle body including the above-mentioned "three-membered" joints.

It is another object of the present invention to improve the strength of the joint between the three members.

[0013]

In order to achieve the above-mentioned object, a cab-over type rear structure of a cab-over type vehicle according to the present invention comprises a floor panel 4 for supporting a seat 6 on an upper surface and a lower surface of a rear portion 8 of the floor panel 4. When a reinforcing panel 9 extending in the left-right direction along with a back panel 11 extending upward from the rear portion 8 of the floor panel 4 is provided,
The front and rear edges 30, 31 of the reinforcing panel 9 are joined to the rear portion 8 of the floor panel 4 so that the side section of the rear panel 8 and the reinforcing panel 9 is box-shaped. 4 rear part 8 and front edge 3 of reinforcing panel 9
0 and spot-welding the floor panel 4
The lower end edge 34 of the back panel 11 is joined to the joint between the rear end edge 27 of the back panel 11 and the rear end edge 31 of the reinforcing panel 9 by spot welding, and the rear portion of the floor panel 4 joined by the spot welding. 8, a reinforcing panel 9, and a rear portion 8 of the floor panel 4 at a middle portion in the left-right direction at a joint portion of the "three members" of a lower portion 16 of the back panel 11.
Forming beads 36 to 38 on at least one member of the lower portion 16 of the back panel 11,
6 to 38 and at least one of the side recesses 45 of the ridge 40 of the beads 36 to 38, through the rear portion 8 of the floor panel 4 and the lower portion 16 of the back panel 11. A gap 44 sandwiched between the rear portion 8 of the floor panel 4 and the lower portion 16 of the back panel 11 on the space 46 side in front of the vehicle body 2 and the lower part of the vehicle body 2 communicate with each other.

[0014]

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

In FIGS. 1 to 4, reference numeral 1 denotes a cab-over type vehicle, and an arrow Fr indicates a forward direction in the traveling direction. The left and right described below refer to the vehicle width direction toward the front.

The vehicle body 2 of the automobile 1 has a vehicle compartment 3 in front of which is a driver's seat. The lower surface of the passenger compartment 3 is formed by a sheet metal floor panel 4, and a seat 6 is supported on the upper surface of the floor panel 4. An opening 7 is formed in the floor panel 4, and the opening 7 is closed from above by the seat 6 so as to be freely opened and closed. An engine is disposed near the lower part of the floor panel 4, and the engine can be maintained and inspected from the vehicle compartment 3 side through the opened opening 7.

A reinforcing panel 9 made of sheet metal is provided extending left and right along the lower surface of the rear portion 8 of the floor panel 4. The rear surface of the passenger compartment 3 is formed of a back panel 11 made of sheet metal. The back panel 11 extends substantially vertically upward from the rear portion 8 of the floor panel 4.

The vehicle body 2 has a pair of left and right rear pillars 12 of high strength and high rigidity which extend substantially vertically and are located on both sides of the rear part of the vehicle compartment 3. Each of the rear pillars 12 includes the floor panel 4, the reinforcing panel 9, and the back panel 1.
1. Each outer edge is spot welded (x in each figure, the same applies hereinafter)
Is more firmly bound.

Another reinforcing panel 13 made of sheet metal is provided extending long in the front-rear direction along the lower surface of the left side portion of the floor panel 4, and the other reinforcing panel 13 is joined to the floor panel 4 by spot welding. At the same time, the rear part of the other reinforcing panel 13 is also joined to the reinforcing panel 9 by spot welding, whereby the floor panel 4 is reinforced.

The rear portion of the vehicle body 2 is a carrier 15. The front edge of the carrier 15 is moved forward and backward by a front support panel 18 detachably fastened to a lower portion 16 of the back panel 11 by a fastener 17, the front support panel 18, and a rear support panel provided at the rear of the vehicle body 2. It is composed of a loading panel 19 whose both ends are supported.

In all figures, the rear portion 8 of the floor panel 4 has an inverted U-shaped bulging portion 22 in which a middle portion in the front-rear direction of the rear portion 8 bulges upward. The bulging portion 22 has a front vertical plate 23 at a front portion, a rear vertical plate 24 at a rear portion, and a ceiling plate 25 at an upper portion, and a front edge 26 of a rear portion 8 of the floor panel 4 is formed by the front vertical plate 23. Of the floor panel 4 extends integrally from the lower edge of the floor panel 4 toward the front.
The rear edge 27 extends rearward from the lower edge of the rear vertical plate 24 integrally.

Each of the upper surfaces of the front edge 30 and the rear edge 31 of the reinforcing panel 9 is formed so that the upper surface of the floor panel 4 and the reinforcing panel 9 have a box-shaped side cross section. The panel 4 is joined to the lower surface of the rear part 8.

The lower portion 16 of the back panel 11 has a substantially L-shaped side section, and includes a vertical plate 33 and the vertical plate 3.
3 and a lower edge 34 bent rearward.

The rear part 8 of the floor panel 4 and the front edge 30 of the reinforcing panel 9 are spot-welded. Also,
At the joint between the rear edge 27 of the floor panel 4 and the rear edge 31 of the reinforcing panel 9, the lower edge 3 of the back panel 11 is provided.
4 are joined, and the joined portions are spot-welded, and the three members of the rear portion 8, the reinforcing panel 9, and the lower portion 16 of the back panel 11 are firmly joined by the spot welding. In particular, since the side cross section of the combination of the rear portion 8 of the floor panel 4 and the reinforcing panel 9 is box-shaped, the strength of the joint of the “three members” is sufficiently improved.

The connecting portion of the above "three members" extends left and right, and a bead is press-formed on at least one of the members at a plurality of locations in the middle of the connecting portion in the left-right direction.

That is, the rear edge 2 of the rear portion 8 of the floor panel 4
7, a first bead 36 is formed. The first bead 36 bulges downward, and has a long front and rear shape. Also, the rear vertical plate 24 of the rear portion 8 of the floor panel 4
A second bead 37 is formed at a lower portion. The second bead 37 bulges rearward and has a vertically long shape. Further, a third bead 38 is formed on the rear edge 31 of the reinforcing panel 9. The third bead 38 bulges downward, and has a long front and rear shape. The first
A plurality of third beads 36 to 38 are provided, each having a concave groove 39 on the inner surface side and a ridge 40 on the outer surface side.

In particular, as shown in FIGS. 1, 5, 8 and 9, the rear portion 8 of the floor panel 4 having a box-shaped section as described above, The bottom of the internal space 43 between the inner space 9 and the outer space 9 is communicated with the outside below this, that is, below the vehicle body 2.
Although not shown, the internal space 43 is provided with the ceiling plate 25.
Through a small hole formed at an end portion in the left-right direction of the device, and communicates with the outside.

In particular, as shown in FIGS. 5 and 7 to 9, the vertical plate 33 of the back panel 11 is in contact with the ridges 40 of the second bead 37, whereby the floor panel 4 The upper part of the rear vertical panel 24 of the rear part 8 and the back panel 11
Between the vertical portions 33 of the lower portion 16 of the lower portion 16, the gap 4 extends over substantially the entire left-right direction of the connection portion of the “three members”.
4 are formed. This gap 44 constitutes a part of the space 46 side above the rear part 8 of the floor panel 4 and in front of the lower part 16 of the back panel 11.

In particular, as shown in FIGS. 1, 5, and 7 to 9, the upper ends of the side recesses 45, 45 of the ridge 40 of the second bead 37 communicate with the gap 44. The groove 39 of the first bead 36 communicates with the lower ends of the recesses 45. These recesses 45, 45 and the groove 39 allow the bottom of the gap 44 to communicate with the lower part, that is, the outside below the vehicle body 2, and as a result, the groove 3
The front and rear of the lower portion 16 of the back panel 11 are communicated with each other through the 9, the gap 44, and the recess 45.
Note that the ridge 40 of the first bead 36 and the third bead 3
The eight concave grooves 39 are fitted with each other.

At the time of electrodeposition coating the joint of the above "three members", the vehicle body 2 including this joint is moved to the electrodeposition liquid 47 in the electrodeposition liquid tank.
When immersed in the the above concave groove 39, small out of the recess 45
The electrodeposition liquid 47 smoothly flows into the internal space 43 through at least one of them, and the gap 4 between the rear portion 8 of the floor panel 4 and the lower portion 16 of the back panel 11.
4, the electrodeposition liquid 47 flows smoothly. On the contrary, when the vehicle body is taken out from the electrodeposition liquid tank,
The electrodeposition liquid 47 is removed from the internal space 43 and the gap 44.
Is smoothly discharged without stagnation.

Therefore, the inner surface of the internal space 43 and the gap 4
The electrodeposition liquid 47 is smoothly adhered to the inner surface of the electrode 4, and after this adhesion, the electrodeposition liquid 47 is prevented from staying in the internal space 43 or the gap 44 for a long time, and thus the “three members” Electrodeposition of the joint portion can be easily performed.

Further, in order to form the concave groove 39 and the concave portion 45, at least one of the "three members" is provided with a bead 36.
Since the toes 38 are formed, the strength of the joint portion of these “three members” is further improved by the beads 36 to 38.

After the coating of the joint of the three members is completed, a sealing material 48 is applied to the upper end of the gap 44 and the upper end of the gap 44 is closed.

[0034]

According to the present invention, the floor panel supports the seat on the upper surface, the reinforcing panel extends in the left-right direction along the rear lower surface of the floor panel, and extends upward from the rear side of the floor panel. In the cabin rear structure of a cab-over type vehicle having a back panel, the front and rear edges of the reinforcing panel are formed at the rear of the floor panel so that the side cross section of the rear of the floor panel and the reinforcing panel is box-shaped. And spot welding the rear portion of the floor panel and the front edge of the reinforcement panel, and joining the lower edge of the back panel to the junction between the rear edge of the floor panel and the rear edge of the reinforcement panel. These are spot welded.

Therefore, the joints of the rear edge of the floor panel, the rear edge of the reinforcing panel, and the lower edge of the back panel, which are joined to each other and spot-welded, are all edges. Achieved by a small welding gun.

Therefore, since the welding gun is small enough, the joining operation of the above-mentioned joints by spot welding can be easily performed.

Further, at the middle of the rear part of the floor panel, the reinforcement panel, and the lower part of the back panel, which are joined by the spot welding, in the left-right direction, the rear part of the floor panel and the back panel bead is formed on at least one member of the bottom of the groove of the bead, the side recesses of the convex bead
Through at least one of the gaps between the rear part of the floor panel and the lower part of the back panel on the space side above the rear part of the floor panel and in front of the lower part of the back panel, and the lower part of the vehicle body. They are in communication with each other.

[0038] For this reason, the rear section of the floor panel and the reinforcing panel connected thereto have a box-shaped side cross section,
Sufficient strength is ensured at the joints of the "three members".
In addition, when the body including the “three-membered” connecting portion is subjected to electrodeposition coating, when the body is immersed in the electrodeposition liquid in the electrodeposition liquid tank, at least one of the concave groove and the recess is provided. Meanwhile, the electrodeposition liquid smoothly flows into a gap between the rear part of the floor panel and the lower part of the back panel. Also,
Conversely, when the vehicle body is taken out of the electrodeposition liquid tank, the electrodeposition liquid flows out smoothly from the gap without stagnation.

Therefore, the electrodeposition liquid is smoothly adhered to the inner surface of the gap, and after the electrodeposition liquid is taken out of the electrodeposition liquid after the adhesion, the electrodeposition liquid is prevented from staying in the gap for a long time. In addition, the electrodeposition coating of the vehicle body including the above-mentioned "three-membered" connecting portion can be easily performed.

Moreover, in order to form the above-mentioned grooves and recesses,
The beads were formed on at least one of the rear part of the floor panel and the lower part of the back panel.
Is improved by the bead.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line 1-1 in FIG.

FIG. 2 is an overall side view of a front portion of a vehicle body.

FIG. 3 is a partially cutaway perspective view of a front portion of a vehicle body.

FIG. 4 is a plan view of a lower part of a vehicle compartment.

FIG. 5 is an enlarged view of a part “5” in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 5;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 5;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 5;

FIG. 9 is a perspective developed view of the one shown in FIG. 5;

FIG. 10 is an enlarged view of a part “10” in FIG. 4;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 3 Cabin 4 Floor panel 6 Seat 8 Rear part 9 Reinforcement panel 11 Back panel 16 Lower part 27 Rear end edge 30 Front end edge 31 Rear end edge 34 Lower end edge 36 First bead (bead) 37 Second bead (bead) 38 third bead (bead) 39 concave groove 40 ridge 43 internal space 44 gap 45 concave 46 space 47 electrodeposition liquid

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-71079 (JP, U) JP-A 62-125654 (JP, U) JP-A 62-78554 (JP, U) JP-A 56-125 31919 (JP, U) Japanese Utility Model Showa 62-112674 (JP, U) Japanese Utility Model Showa 57-177883 (JP, U) Japanese Utility Model Utility Model 3-15793 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) B62D 25/20 B62D 33/06

Claims (1)

(57) [Claims] 1. A floor panel for supporting a seat on an upper surface, a reinforcing panel extending in the left-right direction along a rear lower surface of the floor panel, and a back panel extending upward from a rear side of the floor panel. In the cabin rear structure of the cab-over type automobile, the front and rear edges of the reinforcing panel are joined to the rear of the floor panel so that the side cross sections of the rear portion of the floor panel and the reinforcing panel are box-shaped. While spot welding the rear part of the panel and the front edge of the reinforcing panel,
A lower edge of the back panel is joined to a joint between a rear edge of the floor panel and a rear edge of the reinforcing panel, and these are spot-welded. , And in the middle part in the left-right direction at the joint of the "three members" at the bottom of the back panel, at the rear of the floor panel, at least one of the lower part of the back panel to form a bead,
Of the above-mentioned bead groove and the bead ridge side recess ,
At least one of them , through the space above the rear part of the floor panel and in front of the lower part of the back panel, and the gap between the rear part of the floor panel and the lower part of the back panel, and the lower part of the vehicle body. Rear structure of the cabin of a cab-over type vehicle connected to each other.