JP6253952B2 - Dive prevention device - Google Patents

Description

  The present invention relates to an anti-slipping device that is disposed in a vehicle in order to prevent the intrusion when vehicles collide with each other.

  In general, a vehicle with a high vehicle height, such as a truck, is provided with a vehicle bumper at a lower position in the front and rear of the vehicle in order to prevent the vehicle from entering when a passenger vehicle with a low vehicle height collides. In the vehicle bumper, a nut plate having a nut is attached to the inside of a frame member formed in a rectangular tube shape for weight reduction, and a side portion of the frame member is provided between the nut plate and a vehicle-side stay. It is fixed to the stay by fastening the mounting bolt in a state of sandwiching.

By the way, in the event of a vehicle collision, a particularly large load is applied to the mounting portion with the stay, and deformation and buckling are relatively easily performed. Therefore, the frame member can be partially reinforced at the fastening position between the frame member and the stay. Has been done.
For example, in a vehicle beam (passenger car bumper) disclosed in Patent Document 1, a reinforcing structure is provided on a nut plate by providing a reinforcing structure. The reinforcing member is composed of a pair of vertical wall-like flanges standing substantially parallel to each other in the width direction of the frame member (bumper reinforcing material), and wall-like ribs connecting the pair of flanges. It is formed in a substantially U-shaped or substantially I-shaped cross-sectional shape. And in the vertical wall-shaped flange of the rear surface side, it is joined integrally with the stay and the flange member.

Patent Document 2 discloses that a reinforcing steel material made of H-shaped steel or thin steel is pressed into a frame member (front under-run protector body).
Furthermore, in Patent Document 3, the frame member is partially reinforced by opening the collision surface side and internally installing an inner reinforcing body formed along the inner surface of the hollow portion of the frame member (long bumper material). Yes.

JP 2010-89783 A JP 2008-189273 A Japanese Patent No. 4919267

  However, in the reinforcing member or the like proposed in Patent Documents 1 to 3, even if it is intended to be mounted on a frame member having a bent shape at both ends, the bent portion can pass through even if it can be mounted on the straight portion. Can not. When the reinforcing member is downsized with respect to the inside of the frame member in order to pass the bent portion, the gap with the inner wall of the frame member becomes too large and the reinforcing action does not work effectively, and the function of preventing the dive is sufficient. I can't show it. For this reason, the attachment positions of the stay and the frame member are limited. In addition, it is conceivable that after the nut plate is incorporated into the straight frame member, the bent portion is processed outside, but in this case, it is necessary to alternately perform the frame member processing step and the assembly step. There is a problem that the work becomes complicated. Furthermore, when inserting a core for suppressing wrinkles generated in the vicinity of the bending portion during bending, there is a problem that the nut plate incorporated in the frame member interferes with the core.

  The present invention has been made in view of such circumstances, is lightweight, can improve load resistance performance against a collision, and sets a high degree of freedom in the mounting position between the vehicle and the frame member. An object of the present invention is to provide an anti-slipping device that can perform the above.

The present invention relates to an anti-slipping device having a hollow frame member arranged along a width direction of a vehicle and a nut plate attached to the inside of the frame member for fixing the frame member to a stay on the vehicle side. A base plate portion having a bent portion in the middle of the length direction of the frame member, the nut plate being fixed by sandwiching a rear wall of the frame member between the stay and the base plate; A projecting plate portion disposed in parallel with the upper wall and the lower wall of the frame member in proximity to the surface of the frame member from the front wall of the frame member. the distal end surface having a protruding portion adjacent is formed by the shape that can be arranged inside the arc formed by the radius of curvature of the front wall inner surface of the bent portion, the nut plate, the frame member Characterized in that it is fixed at a position passing through the definitive the bend.

When another vehicle or the like collides with the front wall of the frame member, the front wall is supported by the projecting plate portion provided on the nut plate, and the frame member is attached to the stay on the vehicle side. Is reinforced. Accordingly, the anti-slave device can receive the impact at the time of collision in a distributed manner while suppressing an increase in the overall weight, and can exhibit a sufficient strength against the impact.
In addition, the projecting plate part can be arranged with the tip surface having the projecting part arranged closest to the front wall of the frame member inside the arc formed by the curvature radius of the inner surface of the front wall at the bent part of the frame member. Since the nut plate is formed in such a shape, a gap can always be secured between the bent portion and the nut plate when the nut plate is passed through the bent portion of the frame member, and the nut plate can be passed smoothly. Therefore, the attachment position of the stay and the frame member is not limited before and after the bent portion, and the degree of freedom of the attachment position can be set high.
Further, since the nut plate of the present invention can be attached to the frame member in which the bent portion is formed, when bending the frame member, it is possible to perform bending work such as easily inserting a core for suppressing wrinkles. It can be done easily.

In the intrusion prevention device of the present invention, the tip surface of the protruding plate portion may be formed of an arc surface having a radius of curvature equal to or smaller than the curvature radius of the inner surface of the front wall in the bent portion. The shape of the front end surface of the frame member can be formed by an arc surface formed by a curvature radius that is the same as or smaller than the curvature radius of the inner surface of the front wall at the bending portion of the frame member. Can pass smoothly.
The shape of the front end surface of the protruding plate portion is closer to the inner surface of the front wall of the frame member as the arc surface is closer to the radius of curvature of the inner surface of the inner wall at the bent portion of the frame member. Can be arranged. For this reason, by making the tip surface of the protruding plate part an arc surface that is the same as the radius of curvature of the bent part, it becomes possible to support the front wall in a wide range of the tip surface at the time of collision, and the strength against collision is increased. Can be increased.

In the intrusion prevention device of the present invention, it is preferable that the nut plate is provided with a reinforcing rib for suppressing the fall of the protruding plate portion.
For example, the reinforcing rib may be provided at a connection portion between the base plate portion and the protruding plate portion. Moreover, it can also be set as the reinforcement rib of the shape which connects the front end side of a pair of protrusion board part, and intensity | strength can be further raised with respect to an impact by providing such a reinforcement rib.

In the intrusion prevention device of the present invention, it is preferable that a protrusion is formed at the tip of the protruding plate so as to increase the thickness of the tip of the protruding plate.
By providing a protrusion at the tip of the protruding plate part, the contact area of the tip surface that comes into contact with the front wall of the frame member at the time of collision can be increased, and the impact can be further dispersed and received. The strength against impact can be further increased.

  According to the present invention, it is possible to reduce the weight of the dive-in prevention device, to improve the load resistance performance against a collision, and to set a high degree of freedom in the mounting position between the stay and the frame member.

It is a perspective view which shows the dive-in prevention apparatus of 1st Embodiment of this invention. FIG. 2 is a cross-sectional view of a frame member of the anti-slipping device shown in FIG. 1 and shows a state in which a nut plate is attached. It is a perspective view of a nut plate. FIG. 4 is an A arrow view of the nut plate of FIG. 3. It is sectional drawing which follows the BB line of FIG. It is a figure explaining the assembly of the nut plate to the frame member. It is principal part sectional drawing explaining the frame member and nut plate of the intrusion prevention apparatus of 2nd Embodiment of this invention. It is a perspective view of the nut plate of the intrusion prevention apparatus of 3rd Embodiment of this invention. It is a perspective view of the nut plate of the intrusion prevention apparatus of 4th Embodiment of this invention. It is a perspective view of the nut plate of the intrusion prevention apparatus of 5th Embodiment of this invention.

Hereinafter, an embodiment of an anti-slipping device of the present invention will be described with reference to the drawings.
1 and 2 show a dive prevention device 100 of the first embodiment. As shown in FIG. 1, the intrusion prevention device 100 fixes, to a stay 21, a square cylindrical frame member 10 that extends in the vehicle width direction at a position below a front portion or a rear portion of a vehicle (not shown). As shown by a load F in FIG. 1, when the vehicle collides with the front wall (front surface) 12 of the frame member 10 and a load is applied, the vehicle is prevented from entering.
As shown in FIG. 2, a nut plate 30 used to fix the frame member 10 to the stay 21 on the vehicle side is attached to the inside of the frame member 10. The frame member 10 can be fixed to the vehicle by tightening the mounting bolt 40 penetrating the mounting portion 22 of the stay 21 to the nut portion 32 of the nut plate 30.

The frame member 10 is formed in a rectangular tube shape (hollow shape) by extrusion molding of an aluminum alloy or the like, and is formed to have a length approximately equal to the width dimension of the vehicle to be attached. Further, the frame member 10 is provided with a bent portion 15 in the middle of the length direction so that both end portions are bent toward the vehicle side. The bent portion 15 can be formed by bending or the like.
As the material of the frame member 10, for example, 6000 series alloy or 7000 series alloy aluminum can be used.

The nut plate 30 is formed of a metal material such as steel, for example, and as shown in FIGS. 2 to 5, a base plate portion 31 that fixes the frame member 10 with the rear wall 11 sandwiched between the stay 21 and the base plate portion 31. A pair of base plates 31 are provided in succession and are arranged in parallel with the upper wall 13 and the lower wall 14 of the frame member 10 in proximity to the front wall 12 of the frame member 10 from the upper and lower ends of the base plate portion 31. And a protruding plate portion 33.
A nut portion 32 is welded and erected on the base plate portion 31. And the through-hole which penetrates the base board part 31 and the nut part 32 is formed, and the internal thread part 32a is provided in the nut part 32 side of the through-hole. Further, a guide hole 34 for inserting a guide pin through the base plate portion 31 is provided in the central portion of the base plate portion 31.

  As shown in FIG. 6, the protruding plate portion 33 is provided so that a slight gap is formed with the inner surface of the frame member 10 so that the nut plate 30 can be smoothly moved inside the frame member 10. A gap between the nut plate 30 and the inner surface of the frame member 10 is, for example, about 1 mm to 3 mm. The protruding plate portion 33 has a tip end surface 33 s having a protruding portion 33 p closest to the front wall 12 of the frame member 10, and is formed by a radius of curvature R 1 of the inner surface 12 a of the front wall 12 in the bent portion 15 of the frame member 10. The nut plate 30 is formed with an arc surface having a radius of curvature R2 smaller than the radius of curvature R1.

The surface of the nut plate 30 is coated for insulation so that it does not directly contact the aluminum alloy frame member 10. This is because when the frame member 10 made of an aluminum alloy is brought into contact with another metal having a different potential difference, there is a possibility that the frame member 10 may be corroded to corrode and avoid this.
On the other hand, on the rear wall 11 of the frame member 10 described above, although not shown, the base plate is located at a position where the bolt insertion hole penetrating the rear wall 11 and the bolt insertion hole and the through hole of the nut plate 30 communicate with each other. A positioning hole communicating with the guide hole 34 of the portion 31 is provided.

The nut plate 30 thus configured can be attached to the frame member 10 as follows.
First, the base plate portion 31 of the nut plate 30 is disposed toward the rear wall 11 side of the frame member 10 and pushed into the frame member 10. At this time, since a slight gap is formed between the nut plate 30 and the inner surface of the frame member 10, the nut plate 30 can be smoothly moved inside the frame member 10. Further, as shown in FIG. 6, the nut plate 30 is always moved smoothly because a gap is always ensured between the nut plate 30 and the inner surface of the frame member 10 even when passing through the bent portion 15 of the frame member 10. Can do. The nut plate 30 is fixed at the same time that the frame member 10 is fixed to the stay 21 by the mounting bolt 40 at a position where the bolt insertion hole of the frame member 10 and the through hole of the nut plate 30 communicate with each other.

Next, the operation of the anti-slave device 100 of the above embodiment will be described.
When a vehicle collision or the like occurs from the front of the exterior beam 100, a load is applied to the front wall 12 through the front surface of the frame member 10. In particular, on the front wall 12 in the vicinity of the attachment portion to the vehicle where stress is likely to concentrate, the protruding plate portion 33 of the nut plate 30 is disposed so as to be supported from the inside of the front wall 12 at the time of a collision. Thereby, the frame member 10 is reinforced in the attachment part of the frame member 10 and the stay 21, and rigidity is improved with respect to the collision from the front of the frame member 10. Therefore, the frame member 10 is prevented from being submerged in a passenger car or the like without being easily deformed or buckled.

  Thus, according to the anti-slipping device 100 of the present embodiment, the protrusion provided on the nut plate 30 when an impact is applied such as when another vehicle or the like collides with the front wall 12 of the frame member 10. The front wall 12 is supported by the plate portion 33, and the frame member 10 is reinforced at the attachment portion with the stay 21 on the vehicle side. As a result, the anti-slave device 100 can receive the impact at the time of collision while suppressing an increase in the overall weight, and can exhibit a sufficient strength against the impact.

Further, the protruding plate portion 33 has a distal end surface 33 s having a protruding portion 33 p disposed closest to the front wall 12 of the frame member 10, and a curvature radius of the inner surface 12 a of the front wall 12 in the bent portion 15 of the frame member 10. Since it is formed with a shape that can be arranged inside the arc C1 formed by R1, that is, an arc surface having a radius of curvature R2 smaller than the radius of curvature R1, when the nut plate 30 is passed through the bent portion 15, A gap can always be secured between the nut plate 30 and the nut plate 30 can be passed smoothly. Therefore, the attachment position between the stay 21 and the frame member 10 is not limited before and after the bent portion 15, and the degree of freedom of the attachment position can be set high.
In addition, since the nut plate 30 can be attached to the frame member 10 in which the bent portion 15 is formed, when the frame member is bent, a bending work such as a core can be easily inserted to suppress wrinkles. It can be done easily.

In addition, the shape of the front end surface 33 s of the protruding plate portion 33 can be formed by an arc surface having the same curvature radius as the curvature radius R <b> 1 of the inner surface 12 a of the front wall 12 in the bending portion 15.
The front end surface 33 s of the projecting plate portion 33 has a wider range of the front end surface 33 s as the arc surface is closer to the radius of curvature R 1 of the inner surface 12 a of the inner wall 12 in the bent portion 15 of the frame member 10. It becomes possible to arrange | position close to the inner surface 12a. For this reason, by making the front end surface 33s of the protruding plate part 33 the same arc surface as the radius of curvature R1, it is possible to support the front wall 12 over a wide range of the front end surface 33s at the time of collision. Strength can be increased.

Further, in the nut plate 30 of the first embodiment, the shape of the tip surface 33s of the protruding plate 33 is formed by an arc surface, but the shape of the tip surface 33s is not limited to this.
If the shape of the front end surface 33 s is a shape that can be arranged inside the arc C <b> 1 formed by the radius of curvature R <b> 1 of the inner surface 12 a of the front wall 12 in the bent portion 15 of the frame member 10, the nut plate passes through the bent portion 15. When doing so, a gap can always be secured between the bent portion 15 and the nut plate can be moved inside the frame member 10.
For this reason, for example, like the nut plate 51 of 2nd Embodiment shown in FIG. 7, it is also possible to form the front end surface 33s of the protrusion board part 33 by a flat surface. Also in this nut plate 51, since the protruding plate portion 33 is not disposed beyond the arc C1 having the radius of curvature R1, both sides of the distal end surface 33s are cut off to provide the notch surfaces 33c. A gap between the bent portion of the member 10 can be reliably ensured. In this case, the flat distal end surface 33 s is a protrusion closest to the front wall 12 of the frame member 10.
The main structure of the nut plate 51 shown in the second embodiment is the same as that of the first embodiment, and the same reference numerals are given to the common parts with the first embodiment, and the description is omitted.

Next, third to fifth embodiments of the present invention will be described. The main configurations of the nut plates 51 to 54 shown in the third to fifth embodiments are the same as those of the first embodiment, and the same reference numerals are given to the common parts with the first embodiment. Is omitted.
FIG. 8 shows a nut plate 52 used in the anti-slipping device of the third embodiment of the present invention. The nut plate 52 is formed of a metal material such as steel, like the nut plate 30 of the first embodiment, and welds the nut portion 32 standing on the surface of the base plate portion 31 as shown in FIG. Configured. The nut plate 52 is provided with reinforcing ribs 35 for suppressing the falling of the protruding plate portion 33 inside the connecting portion between the base plate portion 31 and the protruding plate portion 33. Since the protruding plate portion 33 is supported from the inside by the reinforcing rib 35, the inward deformation is suppressed at the time of collision, and the rigidity is enhanced.

  FIG. 9 shows a nut plate 53 used in the anti-slipping device of the fourth embodiment of the present invention. Also in the nut plate 53, as in the nut plate 30 of the first embodiment, the nut portion 32 is formed of a metal material such as steel and is erected on the surface of the base plate portion 31 as shown in FIG. It is constructed by welding. The nut plate 53 is provided with plate-like reinforcing ribs 36 that connect the tip portions of the pair of protruding plate portions 33. The projecting plate portions 33 are supported by the reinforcing ribs 36 from the inside, and the inward deformation at the time of collision is suppressed.

  FIG. 10 shows the nut plate 54 used in the anti-slipping device of the fifth embodiment of the present invention. Also in the nut plate 54, as in the nut plate 30 of the first embodiment, the nut portion 32 is formed of a metal material such as steel and is erected on the surface of the base plate portion 31 as shown in FIG. It is constructed by welding. The nut plate 54 is provided with a ridge portion 37 at the distal end portion of the projecting plate portion 33 so as to increase the thickness of the distal end surface 33 s of the projecting plate portion 33. In this case, the contact area of the front end surface 33s of the protruding plate portion 33 that contacts the front wall 12 of the frame member 10 at the time of collision can be increased, and the impact can be further dispersed, so that the strength against the impact can be increased. It can be further increased.

In addition, this invention is not limited to the thing of the structure of the said embodiment, In a detailed structure, a various change can be added in the range which does not deviate from the meaning of this invention.
For example, the frame member may use other materials such as steel as well as an aluminum alloy.
In the above embodiment, the nut plate is configured to include a pair of protruding plate portions at the upper and lower ends of the base plate portion. However, at least one protruding plate portion may be provided on the surface of the base plate portion. In this case, the same effect as that of the above embodiment can be obtained.

10 Frame member 11 Rear wall 12 Front wall 12a Inner surface 13 Upper wall 14 Lower wall 15 Bending portion 21 Stay 22 Mounting portion 30, 51 to 54 Nut plate 31 Base plate portion 32 Nut portion 33 Protruding plate portion 33p Protruding portion 33s Tip surface 33c Notch surface 34 Guide holes 35, 36 Reinforcement rib 37 Projection 40 Mounting bolt 100 Dive prevention device

Claims (4)

A slip-in prevention device having a hollow frame member arranged along the width direction of the vehicle, and a nut plate attached to the inside of the frame member for fixing the frame member to a vehicle-side stay, There is a bent portion in the middle of the length direction of the frame member, and the nut plate includes a base plate portion that is fixed with the rear wall of the frame member sandwiched between the stay and the surface of the base plate portion. Protruding plate portions arranged close to the front wall of the frame member and parallel to the upper and lower walls of the frame member, the protruding plate portion being the closest protruding portion to the front wall tip surface with is formed by the shape that can be arranged inside the arc formed by the radius of curvature of the front wall inner surface of the bent portion, the nut plate, before the said frame member Bend slip prevention device, characterized in that it is fixed at a position passing through the.   2. The anti-slipping device according to claim 1, wherein a front end surface of the protruding plate portion is formed by an arc surface having a radius of curvature equal to or smaller than a radius of curvature of the inner surface of the front wall in the bent portion. .   3. The anti-slipping device according to claim 1, wherein the nut plate is provided with a reinforcing rib for suppressing the falling of the protruding plate portion.   The protrusion part is formed in the front-end | tip part of the said protrusion board part so that the thickness of the front end surface of this protrusion board part may be enlarged, The Claim 1 characterized by the above-mentioned. Intrusion prevention device.

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