JP5847641B2 - Inrush prevention device - Google Patents

Description

The present invention relates to a rush prevention apparatus having a pair of left and right bumper stearyl over for mounting the bumper on the rear end portion of a vehicle such as specially equipped vehicles and trucks.

  At the rear end of a vehicle such as a specially-equipped vehicle or truck, an intrusion prevention device is required to prevent the front of the vehicle body from entering when another vehicle collides from behind. As described in Patent Documents 1 and 2, for example, a conventional bump preventing device is provided with a flat bumper stay extending at a rearward and downward in a rear end portion of a chassis frame of a vehicle body, and an end portion of the bumper stay. This is a structure in which a bumper extending in the vehicle width direction is fixed.

  FIG. 5 is a plan view showing the configuration of a conventional inrush prevention device, FIG. 6 is a front view, and FIG. 7 is a side view. As shown in FIGS. 5 to 7, the bumper stay 51 of the conventional intrusion prevention device 50 has the ribs 53a and 53b by bending the longitudinal end portion of the flat plate 52 outward in the vehicle body width direction in order to ensure rigidity. Has a substantially U-shaped cross-section. Also, a plate-like reinforcing material 55 is provided on the outer side near the rear end portion where the bumper 54 is fixed, and is formed in a bag shape. The bumper stay 51 is fixed by bolts 56 to the outside of a pair of left and right chassis frames F that extend along the vehicle body longitudinal direction on both the left and right sides in the vehicle body width direction.

JP 7-228209 A JP 2011-201513 A

  However, in the bumper stay 51 of the conventional intrusion prevention device, although the ribs 53a and 53b and the reinforcing material 55 are provided, the load is mainly received by the flat plate 52 portion where the chassis frame F and the bumper 54 are connected. The distance from the outer end of 54 to the flat plate 52 is long, and deformation easily occurs with respect to the outer load of the bumper 54. Further, the bumper stay 51 has a problem that buckling is likely to occur due to the in-plane load of the flat plate 52.

Accordingly, the present invention aims at providing a rush prevention apparatus provided with a bumper stearyl over deformation hardly occurs in the pair against the outer load of the bumper.

  The pair of left and right bumper stays of the present invention are a pair of left and right bumper stays that are fixed to the outside of a pair of left and right chassis frames that extend along the vehicle body longitudinal direction on the left and right sides in the vehicle body width direction, respectively, and support the bumper. A flat frame mounting portion that is in surface contact with the outer surface of the chassis frame and is fixed to the chassis frame, and a flat bumper that is disposed at a predetermined interval on the outer side of the vehicle body width direction with respect to the frame mounting portion and supports the bumper It has a support part and the flat connection part which connected the frame attaching part and the bumper support part diagonally.

  According to the bumper stay of the present invention, the outer load of the bumper is received by the bumper support portion arranged outside the frame attachment portion fixed to the chassis frame, and the frame attachment portion and the bumper support portion are connected obliquely. Since the connecting portion functions as a reinforcing rib, deformation hardly occurs with respect to the outer load of the bumper. Further, by allowing an appropriate deformation by the connecting portion in which the frame mounting portion and the bumper support portion are obliquely connected, it is possible to adjust the strength and the deformation amount necessary for supporting the bumper.

  Here, it is desirable to have reinforcing ribs that are continuous from the frame mounting portion to the bumper support portion at both ends in the longitudinal direction of the vehicle body. With this reinforcing rib, it is possible to adjust the strength and the amount of deformation of the connection portion in which the frame mounting portion and the bumper support portion are connected obliquely.

  The intrusion prevention device of the present invention is a bumper supported by the pair of left and right bumper stays and the pair of left and right bumper stays, and is fixed to the beam extending in the vehicle body width direction and the pair of left and right bumper stays of the beam. And a bumper having a mounting portion extending between the pair of left and right bumper stays.

  Thereby, the intensity | strength of the bumper between bumper stays can be raised, without reducing the mounting space behind the tire of the outer side of a pair of left and right chassis frames.

(1) A flat frame mounting portion that comes into surface contact with the outer surface of the chassis frame and is fixed to the chassis frame, and a flat plate that is disposed at a predetermined interval on the outer side in the vehicle body width direction with respect to the frame mounting portion and supports the bumper Bumper stays that have a flat bumper support and a flat connecting part that connects the frame mounting part and the bumper support part at an angle. Can be achieved. In addition, since the outer surface of the bumper stay is a flat surface of the flat bumper support portion, the appearance is good and it is easy to attach stays such as a back lamp and a license plate. In addition to the flat outer surface of the bumper stay, the connecting portion between the frame mounting portion and the bumper support portion has a flat plate shape that is obliquely connected, so that it is difficult for sediment to accumulate on the bumper stay. In addition, the joint that obliquely connects the frame mounting part and the bumper support part allows moderate deformation, and it is possible to adjust the strength and amount of deformation necessary to support the bumper. It is possible to reduce the influence on the chassis frame when received.

(2) A pair of left and right bumper stays and a bumper supported by the pair of left and right bumper stays. The beam extends in the vehicle body width direction, and is fixed to the pair of left and right bumper stays between the left and right bumper stays. With the intrusion prevention device including the bumper having the mounting portion extending to the front, the strength of the bumper between the bumper stays can be increased without reducing the mounting space behind the tire outside the pair of left and right chassis frames. Moreover, since the area increase of the bumper upper surface behind the tire can be suppressed, the amount of sediment deposited on the bumper upper surface can be reduced.

It is a perspective view which shows the structure of the rush prevention apparatus in embodiment of this invention. It is a top view of the inrush prevention apparatus of FIG. It is a front view of the inrush prevention apparatus of FIG. It is a side view of the inrush prevention apparatus of FIG. It is a top view which shows the structure of the conventional rush prevention apparatus. It is a front view of the inrush prevention apparatus of FIG. FIG. 6 is a side view of the inrush prevention device of FIG. 5.

  FIG. 1 is a perspective view showing a configuration of a rush preventing device according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view.

  As shown in FIGS. 1 to 4, the intrusion prevention device 1 according to the embodiment of the present invention is fixed to the outside of a pair of left and right chassis frames F extending along the longitudinal direction of the vehicle body on both the left and right sides in the vehicle body width direction. A pair of left and right bumper stays 2a, 2b, a bumper 3 supported by the bumper stays 2a, 2b, and a spacer 4 for connecting the bumper stays 2a, 2b and the bumper 3.

  The bumper stays 2a and 2b are in flat contact with the outer surface of the chassis frame F and fixed to the chassis frame F. The bumper stays 2a and 2b are spaced from the frame mounting portion 10 in the vehicle body width direction at a predetermined interval. A flat bumper support portion 11 that is disposed and supports the bumper 3 and a flat connection portion 12 that connects the frame mounting portion 10 and the bumper support portion 11 obliquely continuously. The bumper stay 2a and the bumper stay 2b are symmetrical.

  The frame attachment portion 10 is disposed in parallel with the outer surface of the chassis frame F, that is, in the vehicle body front-rear vertical direction. The bumper support portion 11 is arranged in parallel with the frame attachment portion 10, and a flange 13 for attaching the spacer 4 is provided at the rear end portion thereof. The flange 13 is formed with a plurality of mounting holes (not shown) on the top, bottom, left and right, and the spacer 4 and the flange 13 are joined by bolts (not shown) using the mounting holes. . Reinforcing ribs 14a and 14b are provided at both ends of the bumper stays 2a and 2b in the longitudinal direction of the vehicle body so as to continue from the frame mounting portion 10 to the bumper support portion 11 including the connection portion 12.

  Reinforcing ribs 15 are provided in parallel to the bumper support portion 11 on the back side of the bumper support portion 11 and the connection portion 12 when viewed from the outside in the vehicle body width direction. The reinforcing rib 15 has a substantially concave shape that is cut out obliquely below the rear of the vehicle body. The reinforcing rib 15 is welded to the connecting portion between the frame attaching portion 10 and the connecting portion 12 and the reinforcing ribs 14a and 14b. The space surrounded by the bumper support portion 11, the connection portion 12, and the reinforcing ribs 14a, 14b, and 15 is opened in a diagonally downward direction at the rear of the vehicle body. A horizontal reinforcing rib 16 is provided at the upper end of the flange 13. The reinforcing rib 16 is welded to the bumper support portion 11 and the reinforcing ribs 14a, 14b, and 15.

  The bumper 3 includes a beam 20 that extends in the vehicle body width direction, an attachment portion 21 that extends between the left and right bumper stays 2 a and 2 b, and a flange 22 that is attached to the spacer 4. The mounting portion 21 is welded and fixed to the front side of the beam 20 of the beam 20, that is, the bumper stays 2a and 2b. The flange 22 is formed with a plurality of mounting holes 22a on the top, bottom, left and right, and the spacer 4 and the flange 22 are joined by bolts (not shown) using the mounting holes 22a.

  The rush preventing device 1 having the above configuration is fixed to the chassis frame F by bolts 17 using a plurality of mounting holes formed in the frame mounting portion 10. The spacer 4 has a length set according to the vehicle body to which the inrush prevention device 1 is attached, and a spacer having a desired length is used. The spacer 4 may be omitted and the bumper 3 may be directly attached to the bumper stays 2a and 2b. Further, a retractable spacer that raises or lowers the bumper 3 may be used as necessary.

  In the intrusion prevention device 1 according to the present embodiment, the positions of the bumper support portions 11 of the bumper stays 2a and 2b are outside of the position of the flat plate 52 of the bumper stay 51 of the conventional intrusion prevention device 50. The bumper stays 2a and 2b receive the outer load of the bumper 3 by the bumper support portion 11 arranged outside the frame attachment portion 10 fixed to the chassis frame F, and the frame attachment portion 10 and the bumper support portion 11 Since the connecting portion 12 that is connected obliquely functions as a reinforcing rib, deformation is less likely to occur with respect to the outer load of the bumper 3, and the rush prevention device 1 can be reduced in weight. The oblique connection portion 12 also functions as reinforcement around the bolt 17 of the frame attachment portion 10. Further, since the outer surfaces of the bumper stays 2a and 2b are flat surfaces of the flat bumper support portion 11, the appearance is good, and it is easy to attach stays such as a back lamp and a license plate. Further, in addition to the outer surfaces of the bumper stays 2a and 2b being flat, the connection portion 12 between the frame mounting portion 10 and the bumper support portion 11 is also a flat plate connected obliquely, so that the bumper stays 2a and 2b are connected to each other. Sediment is hard to accumulate.

  Further, in the bumper stays 2a and 2b, moderate deformation is allowed by the connecting portion 12 in which the frame mounting portion 10 and the bumper support portion 11 are obliquely connected, and the strength and deformation amount necessary for supporting the bumper 3 are adjusted. Therefore, the influence on the chassis frame F when the bumper 3 receives a large load can be reduced. In the present embodiment, the strength and deformation amount of the connecting portion 12 can be adjusted by the reinforcing ribs 14a and 14b.

  Further, in the inrush prevention device 1 according to the present embodiment, since the mounting portion 21 of the bumper 3 is located between the left and right bumper stays 2a and 2b, the bumper stay can be reduced without reducing the mounting space behind the tire outside the chassis frame F. The strength of the bumper 3 between 2a and 2b is increased, and it is difficult to be deformed with respect to the outer load of the bumper 3. On the other hand, the bumper 3 is easily deformed with respect to the central load of the bumper 3. . Moreover, since the area increase of the upper surface of the bumper 3 behind the tire can be suppressed, the amount of sediment deposited on the upper surface of the bumper 3 is reduced.

The present invention is useful as a rush prevention apparatus having a pair of left and right bumper stearyl over for mounting the bumper on the rear end portion of a vehicle such as specially equipped vehicles and trucks.

F Chassis frame 1 Intrusion prevention device 2a, 2b Bumper stay 3 Bumper 4 Spacer 10 Frame mounting part 11 Bumper support part 12 Connection part 13 Flange 14a, 14b, 15, 16 Reinforcing rib 20 Beam 21 Mounting part 22 Flange

Claims (2)

A pair of left and right bumper stays that are fixed to the outside of a pair of left and right chassis frames extending along the longitudinal direction of the vehicle body on both the left and right sides in the vehicle body width direction, and support the bumper,
A plate-shaped frame mounting portion fixed to the chassis frame in surface contact with the outer surface of the chassis frame;
A flat bumper support portion that is disposed at a predetermined interval on the outer side in the vehicle body width direction with respect to the frame mounting portion, and supports the bumper;
A pair of left and right bumper stays having a flat plate-like connecting portion that obliquely connects the frame mounting portion and the bumper support portion ;
A bumper supported by the pair of left and right bumper stays; a beam extending in the vehicle body width direction; and a mounting portion fixed to the pair of left and right bumper stays of the beam and extending between the pair of left and right bumper stays. With bumper
Inrush prevention device with 2. The intrusion prevention according to claim 1 , wherein the pair of left and right bumper stays have reinforcing ribs that are continuous from the frame attachment portion to the bumper support portion at both ends in the longitudinal direction of the vehicle body. Equipment .

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