JPH10278847A - Cab safety structure - Google Patents

Abstract

(57) [Problem] To provide a cab collision safety structure with a simple structure that prevents deformation of an engine hood of a floor panel and prevents reduction of occupant space in the cab at the time of a collision. SOLUTION: A flat surface portion 9 and a step portion 8 of an engine hood 1 are provided.
A plurality of reinforcement members 2a as reinforcement members are welded to the space 3 of the above. When an impact force acts on the cab, the reinforce 2a prevents the step 8 from being deformed, and reduces the deformation of the floor panel in the front-rear and left-right directions and the upward lifting, thereby preventing the occupant space from being reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab floor panel of a cab of a cab-over type truck, and more particularly to a cab collision safety structure for preventing deformation of an engine hood and securing a passenger space.

[0002]

2. Description of the Related Art As shown in FIG. 6, a cab 21 of a cab-over type truck has a floor panel 22 formed on the bottom surface side, and is reinforced and supported by an underframe or the like (not shown) supporting the floor panel 22. The cab 21 is rotatably supported by a mount bracket or the like welded to a side frame or a cross member of the vehicle. During a collision or the like, the cab 21 receives a large collision force from the front and rear. However, depending on the magnitude of the collision force, the connection between the cab 21 and the mount bracket is broken, and the impact energy must be absorbed only on the cab 21 side. There is no case. In that case, a considerably large impact force acts on the cab 21.

FIG. 7 shows a detailed structure of the cab 21 on the floor panel 22 side. The floor panel 22 includes the engine hood 1 arranged at the center, the left side floor panel 17 and the right side floor panel 18 connected to the left and right. Further, as described above, the floor panel 22 is reinforced and supported from below by the under frame including the under front frame 23 and the under rear frame 24. A bed pan 14 for mounting and supporting a bed (not shown) is connected to the engine hood 1 and the rear ends of the left and right side floor panels 17 and 18.

As shown in FIGS. 7 and 8, the engine hood 1 is formed with several steps 8, 12 in order to prevent interference with an engine or the like disposed on the lower surface side. On the other hand, the left and right side floor panels 17 and 18 also have a slight step, but the step is lower than the engine hood 1 and the left and right side floor panels 17 and 18 are reinforced by the underframe. Therefore, it is made of high rigidity.

On the other hand, there are many known techniques for reinforcing floor panels. For example, Japanese Laid-Open Utility Model Publication No. 6-57777 discloses “Reinforcement of cab floor”. This known technique holds an insulator (25) and a radiator cover (24) in an engine room below a floor panel (20) and reinforces the periphery of a leg of a center sheet (22) of the floor panel (20). A force (21) is provided.

As shown in FIG. 9, as a reinforcing means for reinforcing the cab 21 and the floor panel 22, a pipe-like reinforcing member 26 is provided between the front panel 27 side of the cab 21 and the rear receiving member 25. And a pipe-shaped reinforcing member 28 is installed diagonally between the front panel 27 and the floor panel 22.

[0007]

Problems to be Solved by the Invention
The reinforcement (21) described in Japanese Patent Application Laid-Open Publication No. H11-157556 functions as a reinforcing member for a mounting portion of the center sheet (22) and functions to improve the assemblability of the radiator cover (24), the insulator (25) and the like. Floor panel (2
The function of the step portion of 0) as a reinforcing material is low.

The pipe-shaped reinforcing member 2 shown in FIG.
6 and 28 partially protrude into the cabin of the cab 21 and may interfere with various components such as the instrument panel 29 and the transmission control around the steering handle 20. There is a problem that the surrounding space is narrowed, which impairs operability and ride comfort.

Therefore, in the conventional cab structure, as shown by a dotted line in FIG. 8, in the event of an unexpected collision or the like, the floor panel 22, particularly around the steps 8, 12 of the engine hood 1, is deformed and bent downward. had to be reduced in comparison with the passenger space M in a free state where the occupant space M ₂ is not generated collision between the seat 19 and the steering wheel 20. As described above, the left and right sides of the engine hood 1 have relatively high rigidity.
As a result, the impact energy concentrates on the engine hood 1, and particularly around the steps 8, 12, is deformed in the front-rear and left-right directions, resulting in a large downward bending.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a reinforcing member is provided around an especially stepped portion of an engine hood which is deformed at the time of unexpected collision or the like to prevent bending deformation thereof. To provide a cab collision safety structure that has a simple structure and that reinforces the engine hood with a triangular reinforce that does not damage or interfere with interior components and prevents a reduction in occupant space during a collision or the like. The purpose is to:

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an engine hood arranged to cover an engine or the like and forming a step, and left and right side floor panels connected to both sides thereof. A collision safety structure for preventing a reduction in occupant space due to deformation of the floor panel at the time of a collision of a cab having a floor panel made of the same, and the like. The reinforcing member for preventing the cab constitutes a collision safety structure of the cab which is disposed by welding on the floor panel. More specifically, the reinforcing member has a bent plate portion having a flat surface formed on the front side of a step of the engine hood and a contact surface that comes into contact with the step rising from the rear end of the flat surface. And a triangular reinforce having a side wall portion for reinforcing the bent plate portion, and a plurality of the reinforces are arranged side by side.

An integral reinforcing member is welded to the step of the engine hood and the flat surface in front of the step. Therefore, the rigidity of this portion is increased, and the deformation of the step portion is prevented at the time of a collision or the like, and the downward bending deformation of the engine hood is reduced. Further, since the reinforcing member is formed of a triangular reinforce and the reinforce is disposed on the upper surface side of the engine hood, the structure is simple and interference with other components is prevented. In addition, by disposing a plurality of reinforces, the overall deformation of the engine hood is greatly reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cab collision safety structure according to the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 and 5, the engine hood 1 includes a front plate portion 10.
A flat surface portion 9, a step portion 8 rising from the rear end,
A flat surface portion 11 extending substantially horizontally rearward from a rising end of the step portion 8 and a step portion 1 rising from the end portion;
2 and a flat surface portion 13 extending substantially horizontally rearward from the rising end of the step portion 12. The front plate 10 is connected to a front panel (not shown), and a bed pan 14 (FIG. 7) is connected to the rear end of the rearmost flat surface 13. Also, the left and right flange surfaces 1 of the engine hood 1
Left and right side floor panels 17 and 18 are welded to 5 and 16, respectively.

In this example, as shown in FIGS. 1 and 5,
The reinforcing member 2 is fixed to the flat surface 9 and the step 8. That is, the reinforcing member 2 is installed in the space 3 on the upper surface side of the engine hood 1 forming the step 8 of the engine hood 1.
In this example, a plurality (four in the figure) of reinforcing members 2 having the same or similar shapes are arranged in parallel in the space 3. Of course, the number is not limited to the illustrated one.

As shown in FIGS. 2 to 4, the reinforcing member 2 of this embodiment is made of a triangular reinforce 2a, and has one bent plate portion 4 and a side wall portion welded to one side edge thereof to form a side wall. 5 More specifically, the bent plate portion 4 includes a contact surface 6 that contacts the flat surface portion 9 illustrated in FIGS. 1 and 5, and a contact surface 7 that contacts the stepped portion 8 obliquely from the rear end of the contact surface 6. Are formed by bending a plate material. On the other hand, the side wall 5
Is formed of a triangular plate-like plate member which is welded to one side edge of the bent bent portion 4 and is bridged between the front end of the contact surface 6 and the upper end of the contact surface 7. In the above description, the side wall portion 5 is welded to one side edge of the bent plate portion 4;
It may be an intermediate part.

As shown in FIG. 1, the reinforcement 2a having the above structure is welded by bringing the contact surface 6 of the bent plate portion 4 into contact with the flat surface portion 9 and the contact surface 7 into contact with the step portion 8. The adjacent reinforcements 2a, 2a are arranged in the space 3 with the side walls 5 facing each other.

By providing the reinforce 2a having the above structure in the engine hood 1, even if an impact force acts on the cab 21, the engine hood 1 is prevented from bending around the step 8 of the engine hood 1, as shown in FIG. the passenger space M ₁ between the seat 19 and the steering wheel 20 can be held much greater than the passenger space M ₂ shown in FIG. The reinforce 2a has a simple structure as shown in the figure, and is easily formed by sheet metal working. In addition, since it is arranged in the space 3 on the upper surface side of the engine hood 1, there is no interference with other components in the cab 21, and there is no obstacle to comfort and operability.

As a result of analyzing the deformation of the cab provided with the reinforce 2a having the above-described structure at the time of collision using an analytical model, as compared with the case where the reinforce 2a is not used,
It was confirmed that the deformation in the front-rear direction and the left-right direction was significantly reduced, and it was also found that the effect was effective in the sheet lifting direction.

[0019]

【The invention's effect】

1) According to the cab collision safety structure according to claim 1 of the present invention, a significant reduction in occupant space is prevented by simple means of simply welding a reinforcing member to a space around the step of the engine hood. And protect the occupants. 2) According to the cab collision safety structure according to claim 2 of the present invention, the reinforcement of the reinforcing member reinforces the stepped portion and the bent plate portion to be welded by contacting with the flat surface portion in front of the stepped portion and the one side surface. It is formed from a simple structure including a side wall, and can be implemented at low cost. Also, in view of its cross-sectional shape and arrangement, interference with other components in the cab is avoided, so that it does not adversely affect comfort and operability. 3) According to the cab collision safety structure according to claim 3 of the present invention, by disposing a plurality of reinforces,
The deformation of the engine hood is further reduced, and the occupant protection can be completed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an engine hood and a reinforcing member of the present invention.

FIG. 2 is a perspective view of a reinforcement of the reinforcing member of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is a longitudinal sectional view of the engine hood of the present invention.

FIG. 6 is a perspective view showing a schematic structure of a cab of a cab-over type truck.

FIG. 7 is a divided perspective view showing a detailed structure of a floor panel and components around it.

FIG. 8 is a schematic diagram showing a deformed state at the time of a collision around a conventional floor panel.

FIG. 9 is a schematic view showing an example of a conventional floor panel reinforcing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine hood 2 Reinforcement member 2a Reinforce 3 Space part 4 Bent plate part 5 Side wall part 6 Contact surface 7 Contact surface 8 Step part 9 Flat surface part 10 Front plate part 11 Flat surface part 12 Step part 13 Flat surface part 14 Bed pan 15 Flange Surface 16 Flange surface 17 Left side floor panel 18 Right side floor panel 19 Seat 20 Steering handle 21 Cab 22 Floor panel 23 Under front frame 24 Under rear frame

Claims (3)

[Claims] 1. An engine hood, which is provided to cover an engine or the like and forms a stepped portion, and a floor panel comprising left and right side floor panels connected to both sides of the engine hood. A collision safety structure for preventing a reduction in occupant space due to deformation, wherein a reinforcing member for preventing deformation of the step portion is provided on the step panel of the engine hood by welding on the floor panel. A cab collision safety structure characterized by the following: 2. A bent plate portion, wherein the reinforcing member has a contact surface that comes into contact with a flat surface portion formed in front of a step portion of the engine hood and the step portion rising from a rear end of the flat surface portion. The cab collision safety structure according to claim 1, comprising a triangular-shaped reinforce having a side wall portion for reinforcing the bent plate portion. 3. The cab collision safety structure according to claim 2, wherein a plurality of said reinforcements are arranged side by side.