JPH053421Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a belt anchor structure for a cab-over type automobile.

(Prior art) Conventionally, it has been legally required to equip each seat in a car with a seat belt, and in the case of cab-over type vehicles such as cab-over type trucks and van wagons, there are two sets of seat belts: a seat belt for the driver's seat and a seat belt for the auxiliary seat. Seat belts were installed.

In the event of a car crash, a large load is applied to the seat belt, so the belt anchor structure of the seat belt must have sufficient strength. The belt anchor structure of the seat belt of the auxiliary seat is described.

In the above belt anchor structure, a hook is rotatably attached to a bracket at the rear end of the engine cover, which serves as a cabin floor panel, and the lower end of the seat belt is fixed to the hook, so that a load is applied to the seat belt in the event of a collision. When the hook rotates, the tip of the hook engages with a support on the cross member side at the lower end of the back panel, so that the load acting on the seat belt is supported by the cross member via the hook and support. It is something.

In recent cabover type cars, the 6th
As shown in the figure, the rear end of the cabin floor panel 101 and the back panel 10 are designed to reduce the weight of the vehicle body structure.
2 is generally connected to the lower end of the floor panel 10 through a cross member 103 having an inverted U-shaped cross section.
The rear ends of a pair of left and right frames arranged in the front-rear direction on the lower side of 1 are connected to a cross member 103, and the belt anchors of the two sets of seat belts for the driver's seat and the auxiliary seat are attached to the floor panel 101. It is attached to the rear end.

(Problems to be solved by the invention) In the case of the belt anchor structure described in the above publication, the brackets, hooks, etc. protrude from the rear end of the floor panel, and the structure has a large number of components such as brackets, hooks, and supports. There are disadvantages such as increased complexity.

In the case of a structure in which the rear end of the floor panel and the lower end of the back panel are connected by the above-mentioned cross member with an inverted U-shaped cross section, belt anchors for two sets of seat belts for the driver's seat and the auxiliary seat are provided. The gap between the pair of belt anchors for the seat and the pair of belt anchors for the auxiliary seat is large, and the structure of the belt anchors
There are no particular problems in terms of strength.

By the way, due to recent revisions to laws and regulations, it has become necessary to install an intermediate seat belt between the driver's seat belt and the auxiliary seat seat belt. The belt anchors are provided near the left anchor of the belt anchor for the driver's seat and near the right anchor of the belt anchor for the auxiliary seat.

In this case, when the load acting on the intermediate seat belt is taken into account, the load acting on the left side anchor of the driver's seat belt anchor and the right side anchor of the auxiliary seat belt anchor is approximately doubled, so the conventional structure is sufficient. It becomes difficult to ensure sufficient strength.

(Means for Solving the Problems) The belt anchor structure for a cab-over type vehicle according to the present invention is provided with a cross member extending in the vehicle width direction and having an inverted U-shaped cross section and connecting the rear end of the floor panel and the lower end of the back panel. , an anchor plate joined to a pair of left and right frames fixed to the floor panel in the front-rear direction is joined to the lower surface of the upper wall of the cross member and the lower surface of the floor panel over its entire length, and the cross member and the anchor plate Tode 1st
A closed cross-section structure is formed, the lower end of the rear wall of the cross member and the anchor plate are connected by a reinforcement extending in the vehicle width direction, and the cross member, the anchor plate, and the reinforcement form a first closed cross-section structure. A second closed cross-sectional structure is formed that is integral with the structure.

(Function) In the belt anchor structure for a cab-over type automobile according to the present invention, as described above, the rear end of the floor panel and the lower end of the back panel are connected by a cross member having an inverted U-shaped cross section, and the anchor plate extends between the left and right frames. is joined to the lower surface of the upper wall of the cross member and the lower surface of the floor panel over its entire length, and the cross member and anchor plate form a first closed cross-section structure extending between the left and right frames, whereby the cross member connects to the anchor plate. The anchor plate is reinforced by being integrated with the first closed cross-section structure.

The lower end of the rear wall of the cross member and the anchor plate are connected by a reinforcement extending in the vehicle width direction, and the cross member, the anchor plate, and the reinforcement form a second closed section structure integral with the first closed section structure. Since a closed cross-sectional structure is formed, the cross member is further reinforced by the reinforcement, and the anchor plate is strongly connected to the cross member via the reinforcement, thereby being further reinforced.

(Effect of the invention) According to the belt anchor structure for a cab-over type vehicle according to the invention, as explained above, the cross member with an open cross section is closed as the first closed cross section structure via the anchor plate extending between the left and right frames. At the same time, this cross member is made into a closed section as a second closed section structure that is integrated with the first closed section via the reinforcement and the anchor plate, so that the floor panel and the back panel are connected. The structure and strength of the cross member are greatly improved.

The anchor plate is not only integrally joined to the reinforced cross member, but also strongly connected to the cross member via reinforcement, which greatly improves the structure and strength of the belt anchor structure. .

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, the floor panel 1 of the cabin of the cab-over type truck T is explained based on the front, rear, left and right sides of the cab-over type truck T.
A cross member 3 connecting the rear end and the lower end of the back panel 2 is provided over substantially the entire width.

As shown in FIGS. 2 to 5, the cross member 3 includes a horizontal upper wall portion 3a having a predetermined width, and a front wall portion 3b extending vertically downward from the front edge of the upper wall portion 3b.
The back panel is formed by integrally forming a rear wall portion 3c extending vertically downward from the rear edge of the upper wall portion 3a, and a collar wall portion 3d extending horizontally rearward from the lower edge of the rear wall portion 3c. The lower end of the floor panel 1 is joined to the rear surface of the rear wall 3c by spot welding, and the rear edge of the floor panel 1 is joined to the upper surface of the joint edge _3b0 extending obliquely downward from the lower end of the front wall 3b. .

As shown in FIG. 2, frames 4 each having a U-shaped cross section and extending in the front-rear direction are joined to the lower side of the floor panel 1 on the left and right sides of the cabin, respectively.
A frame connecting member 5 having a U-shape when viewed from the front is joined to the lower side of the cross member 3 at a position corresponding to each rear end of the pair of left and right frames 4. It is joined in a circumscribed manner to both sides of the frame connecting member 5 (see FIG. 5).

A service hole 6 that opens above the engine room is opened between the pair of left and right frames 4 in front of the cross member 3, and this service hole 6 is connected to the floor panel 1 in the center of the cabin.
It is covered with a cover plate (not shown) that can be opened and closed freely.

The driver's seat in the cabin is provided with a driver's seat seat belt 7, an auxiliary seat seat belt 8, and an intermediate seat belt 9 for a seat between the driver's seat and the auxiliary seat.

A first bracket 10 is fixed to the floor panel 1 and the anchor plate 12 with bolts 10a on the upper surface of the rear end of the floor panel 1 at a position slightly to the right of the center of the vehicle width, and is also fixed to the floor panel 1 and the anchor plate 12 with bolts 10a. A second bracket 11 is fixed to the floor panel 1 and the anchor plate 12 with bolts 11a on the upper surface of the rear end of the floor panel 1 at a position slightly biased towards the center of the vehicle width.
The brackets 10 and 11 are provided with a pair of belt attachment portions 10b and 11b that rise diagonally upward, respectively.

The lower end portion of the left side belt of the driver's seat seat belt 7 and the lower end portion of the right side belt of the intermediate seat belt 9 are connected to the left and right belt attachment portions 10b of the first bracket 10, respectively. The lower end portion of the left side belt of the intermediate seat belt 9 and the lower end portion of the right side belt of the seat belt 8 for the auxiliary seat are connected to the left and right belt attachment portions 11b, respectively.

Here, since a large load is applied from the seat belts 7, 8, and 9 to the first bracket 10 and the second bracket 11 at the time of a collision of the truck T, the first bracket
In order to sufficiently reinforce the structural strength of the rear end portion of the floor panel 1 to which the bracket 10 and the second bracket 11 are attached, and to reinforce the rigidity and strength of the cross member 3, an anchor plate 12 and reinforcement 13 are installed as follows. It is set up as follows.

From inside frame 4 on the left side to frame 4 on the right side
An anchor plate 12 is disposed below the cross member 3 and the rear end of the floor panel 1 in a forward downward slope, and the front end of the anchor plate 12 is on the lower surface of the rear end of the floor panel 1. At the same time, the rear end portion of the anchor plate 12 is joined to the rear lower surface of the upper wall portion 3a of the cross member 3.

As a result, the front part of the cross member 3 and the anchor plate 12 form a closed section having a right-angled isosceles triangular cross section, and anchors are also provided on the lower surface side of the floor panel 1 to which the first bracket 10 and the second bracket 11 are attached. The plates 12 are overlapped and joined, and the floor panel 1 is also reinforced.

Furthermore, the flange portion 12a at the left end of the anchor plate 12 is joined to the inner surface of the left frame connecting member 5, and the flange portion 12a at the right end of the anchor plate 12 is joined to the inner surface of the right frame connecting member 5. There is.

A flange 12b is formed downward at the front edge of the anchor plate 12 to increase rigidity.

The reinforcement 13 extends approximately the entire length of the anchor plate 12 in the vehicle width direction, and is disposed approximately horizontally below the flange wall 3d of the anchor plate 12 and the cross member 3. The mounting portions 13a at the front edge are connected to the lower surface of the anchor plate 12 with eight bolts 14 at appropriate intervals in the vehicle width direction, and the rear edge is joined to the lower surface of the flange wall 3d.

Note that nuts 14a for the bolts 14 are fixed in advance to the upper surface of the anchor plate 12, and the bolts 14 are fastened from the lower surface.

As a result, the rear portion of the cross member 3, the anchor plate 12, and the reinforcement 13 form a closed section having a trapezoidal cross section.

Note that the front edge of the reinforcement 13 may be joined to the portion of the anchor plate 12 that overlaps the floor panel 1.

In the belt anchor structure described above, the anchor plate 12 and reinforcement 13 are joined as described above to the cross member 3 at the portion between the left and right frames 4 to which the first and second brackets 10 and 11 are attached. Since the triangular closed cross section and the trapezoidal closed cross section are formed, the rigidity and strength of the portion of the cross member 3 extending between the left and right frames 4 are significantly improved, and the connection between the cross member 3 and the left and right frames 4 is significantly improved. The connection structure will be significantly strengthened.

Furthermore, the rear end of the floor panel 1, on which the first and second brackets 10 and 11 are attached, is strongly connected to the strong cross member 3 via the anchor plate 12 and reinforcement 13, so that it can be used as a belt anchor. The structure and strength are sufficient.

Even if a large load is applied to the first and second brackets 10 and 11 during a collision of a truck T, the connection between the floor panel 1 and the cross member 3 is strong, and the cross member has a double closed cross section. Since the bending rigidity and torsional rigidity of No. 3 are also high, it can sufficiently withstand the large load.

[Brief explanation of the drawing]

Among the drawings, FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of the main part of a cab-over type truck, FIG. 2 is a cross-sectional plan view of the main part showing the belt anchor structure, and FIG. Figure 3 is a sectional view taken along the line shown in Figure 2;
4 is a cross-sectional view taken along the line of FIG. 2, FIG. 5 is a cross-sectional view taken along the line of FIG. 2, and FIG. 6 is a view corresponding to FIG. 3 according to the prior art. 1...Floor panel, 2...Back panel, 3
...Cross member, 3a...Top wall portion, 3c...Rear wall portion, 4...Frame, 12...Anchor plate, 13...Reinforcement.

Claims (1)

[Scope of utility model registration request] An anchor plate is provided with a cross member that extends in the vehicle width direction and has an inverted U-shaped cross section and connects the rear end of the floor panel and the lower end of the back panel, and is joined to a pair of left and right frames that are fixed to the floor panel in the longitudinal direction. is joined to the lower surface of the upper wall of the cross member and the lower surface of the floor panel over its entire length, the cross member and the anchor plate form a first closed cross-sectional structure, and the lower end of the rear wall of the cross member and the anchor plate are connected by a reinforcement extending in the vehicle width direction, and the cross member, anchor plate, and reinforcement form a second closed cross-section structure that is integrated with the first closed cross-section structure. Belt anchor structure for cab-over type automobiles.