JP5057197B2 - Front underrun protector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a front underrun protector provided below a front bumper such as a large truck, and more particularly to a structure for mounting a front underrun protector to a vehicle body frame.
[0002]
[Prior art]
For example, a front under lamp protector is installed under the front bumper of a large truck to protect passengers by preventing vehicles with low vehicle height such as passenger cars from entering under the large truck in the event of a frontal collision. It is known to provide.
[0003]
For example, as shown in FIG. 8, the front underrun protector 101 is known to be attached to a lower front portion of a body frame 102 such as a large truck. That is, the front underrun protector 101 is fixed to the respective stays 105, 105 attached to the front side of the pair of side rails 104, 104 provided substantially orthogonal to the front cross member 103 provided in the vehicle width direction. The longitudinal direction is provided in the vehicle width direction.
[0004]
[Problems to be solved by the invention]
For the front underrun protector 101, a steel square pipe having a hollow cross section is usually used to reduce the weight of the vehicle body. Thin square pipes cannot be threaded due to their thin plate thickness. For this reason, in order to fix the front underrun protector 101 to the stays 105, 105, it is conceivable to use a simple fastening means using bolts and nuts to improve the efficiency of the attachment work.
[0005]
In the fastening means using bolts and nuts, when tightening the bolts and nuts, it is necessary to press or fix any of these bolts and nuts inside the square pipe. However, since the front under-run protector 101 is a place where the position fixed to the stays 105, 105 enters from the end to the back, it is difficult to hold the nut or bolt with a tool such as a spanner.
[0006]
As described above, since it is difficult to fix the front underrun protector 101 to the stays 105 and 105 with fastening means using bolts and nuts, the attachment work has been performed by welding, which is a troublesome work. Further, when a passenger vehicle collides with the front underrun protector 101 and a load F is applied, the front underrun protector 101 is a thin hollow square pipe and therefore bends in the vicinity of the fixed portion. As a result, a recess 106 is formed near the fixed portion of the front underrun protector 101 as shown in FIG. 8, and the strength as the front underrun protector is reduced.
[0007]
For this reason, conventionally, the front under-run protector 101 is fixed to the stays 105, 105 by welding which is troublesome. Japanese Patent Laid-Open No. 9-263198 discloses an example in which a front underrun protector is welded and fixed to a stay.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The front underrun protector can easily attach the front underrun protector and can increase the strength in the vicinity of the fixing portion of the front underrun protector. Is to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a front underrun protector fixed to a vehicle body frame via a stay, a protector member having a hollow cross section, a protector mounting reinforcing member inserted into the protector member, A member to be coupled that is fixed in contact with the protector mounting reinforcing member, and a coupling member. The protector member has a mounting hole, extends in the vehicle width direction, and is fixed to the mounting portion of the stay. The length of the protector reinforcing member in the vertical direction of the vehicle body is substantially the same as the vertical length inside the protector member in the vertical direction. The coupling member is inserted and engaged with the coupled member through the mounting hole to fix the protector member to the mounting portion of the stay. One side part of the protector attachment reinforcing member is brought into close contact with the inner surface of the protector member at the rear of the vehicle body, and the other side part of the protector attachment reinforcing member is brought into contact with or approached to the inner surface of the protector member at the front side of the vehicle body. The member to be coupled is fixed to one side portion above the other side portion in the vertical direction of the vehicle body and to one side portion below the other side portion in the vertical direction of the vehicle body. The protector mounting reinforcement member includes an upper inclined plate extending from the other end to the upper end of one side above the other side, and from the other end to the lower end of one side below the other end. And a lower inclined plate that extends. The upper inclined plate and the lower inclined plate are formed in a V shape having the other end as a vertex in a cross section in the vehicle vertical direction along the vehicle longitudinal direction.
In the present invention, when the protector member having a hollow cross section is fixed to the stay provided on the vehicle body frame, the protector mounting reinforcing member to which the member to be coupled is fixed is used, and the protector mounting reinforcing member is inserted and disposed inside the protector member. Then, the protector member is fixed to the stay by inserting and coupling the coupling member to the coupled member through an attachment hole formed in the protector member.
[0010]
Examples of the fixing means composed of the coupled member and the coupling member include a fastening member composed of a bolt and a nut, and a fastening means composed of a fastening member that is inserted and engaged with the coupled member.
[0011]
Thus, since the protector attachment reinforcing member to which the member to be coupled is fixed is inserted into the protector member, the protector member can be easily moved by simply inserting and engaging the coupling member with the member to be coupled. It can be easily fixed to the stay.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. The present embodiment is an example of a mounting structure of a front underrun protector that is mounted below a front bumper such as a large truck.
[0013]
FIG. 1 is a perspective view showing an example in which a protector member with a protector mounting reinforcing member inserted into a stay provided on a vehicle body frame is fixed with bolts and nuts, and FIG. 2 is an enlarged view of a fixing portion of a front underrun protector. 3 is an enlarged perspective view of a main part, FIG. 3 is a side view showing an example in which a front under-run protector having a protector mounting reinforcing member inserted into a stay provided on a body frame is fixed with a bolt and a nut, and FIG. FIG. 5 is a further enlarged side view of the main part of FIG. 3 showing a state where there is a gap between the protector mounting reinforcing member inserted into the front underrun protector and the inner surface.
[0014]
As shown in FIGS. 1 to 4, the front underrun protector 1 according to the present embodiment is provided with a pair of stays 3, 3 attached to the front of a vehicle body frame 2 of a large truck in a downward direction (road surface side). It is fixed. The vehicle body frame 2 includes a front cross member 4 and a rear cross member (not shown) provided in the vehicle width direction, and a pair provided in the vehicle front-rear direction substantially orthogonal to the front cross member 4 and the rear cross member. The side rails 5 and 5 are mainly configured.
[0015]
As shown in FIGS. 1 and 2, the pair of stays 3 and 3 are attached to the positions near the tips of the side rails 5 and 5 so as to extend toward the road surface. A protector mounting plate 6 for mounting the front underrun protector 1 is provided at a position near the tips of the stays 3 and 3. The protector mounting plate 6 is provided with a bolt insertion hole 9 for fixing the front underrun protector 1 with fastening means (fixing means) including, for example, a bolt 7 as a coupling member and a nut 8 as a coupled member. ing.
[0016]
As shown in FIGS. 1 and 2, the front underrun protector 1 includes a protector member 10 formed of a square pipe having a hollow cross section, and a protector mounting reinforcing member 11 inserted into the protector member 10. . The protector member 10 is made of, for example, a steel hollow square pipe having a rectangular cross section, and has substantially the same length as a front bumper (not shown). The protector member 10 is formed, for example, by bending a thin steel plate as a rectangular pipe having a rectangular cross section. Further, the protector member 10 is formed with a mounting hole (not shown) for inserting the bolt 7 described above on a surface that is in close contact with the protector mounting plate 6.
[0017]
On the other hand, as shown in FIG. 1, the protector mounting reinforcing member 11 is also formed by bending a steel plate into a substantially V shape and bending the tips of the inclined plates 11a and 11a folded into the V shape in a direction facing each other. Thus, the folded plates 11b and 11b are formed. The folded plates 11b and 11b are formed with bolt insertion holes (not shown) through which bolts for fixing the protector member 10 to the stays 3 and 3 are inserted. Further, a nut 8 screwed with the bolt 7 is fixed at a position where the bolt insertion hole is formed. The nut 8 is firmly fixed by welding to the inner surface opposite to the outer surface (one side portion) in close contact with the inner surface of the protector member 10. Of course, the nut 8 may be fixed to the inner surfaces of the folded plates 11b and 11b with a strong adhesive.
[0018]
Further, the protector mounting reinforcing member 11 has such a size that it can be inserted into the inside thereof from the openings 12 at both ends in the longitudinal direction of the protector member 10. That is, as shown in FIG. 1, the protector mounting reinforcing member 11 has a vertical length L1 between the folded portions that are the connecting portions of the inclined plates 11 a and 11 a and the folded plates 11 b and 11 b within the protector member 10. The length is substantially the same as or slightly shorter than the vertical length L2 in the vertical direction of the vehicle body. The horizontal length L3 between the connecting portion of the inclined plates 11a and 11a and the folding plates 11b and 11b is slightly shorter than the horizontal length L4 in the longitudinal direction of the vehicle body inside the protector member 10.
[0019]
Therefore, as shown in FIG. 5, there is a slight gap S between the tip portion (other side portion) 13 which is a connecting portion of the two inclined plates 11a and 11a and the inner surface 10a on the opposite side. it can. The gap S is, for example, about 1 mm to 2 mm so that the protector mounting reinforcing member 11 can be easily inserted into the protector member 10 smoothly. Of course, the gap S may be slightly wider than 1 mm to 2 mm to the extent that rattling does not occur. If the gap S is too large, the protector member 10 may be bent and deformed when an impact is applied due to a collision with a passenger car or the like. For this reason, the said clearance gap S is set to an appropriate dimension in consideration of the workability of inserting the protector attachment reinforcing member 11 into the protector member 10 and bending deformation.
[0020]
Thus, by forming the protector mounting reinforcing member 11 under the above-described conditions, the protector mounting reinforcing member 11 can be smoothly inserted into the protector member 10 and the bolt 7 is naturally attached to the nut 8. It can be placed in a position that smoothly enters.
[0021]
The front underrun protector 1 configured as described above is fixed to the stays 3 and 3 of the vehicle body frame 2 as follows. That is, as shown in FIG. 1, the protector mounting reinforcing member 11 is inserted from both openings 12 of the protector member 10, and the protector mounting reinforcing member 11 is provided with mounting holes and nuts 8 provided in the protector member 10. Insert to the opposite position. Since the protector mounting reinforcing member 11 is formed in the size as described above, it is smoothly inserted into the protector member 10. Of course, the insertion state does not cause rattling inside.
[0022]
Further, since the vertical length L1 of the protector mounting reinforcing member 11 is substantially the same as the vertical length L2 inside the protector member 10, the bolt 7 can be simply inserted by inserting the protector mounting reinforcing member 11. The nut 8 is arranged at a position facing the mounting hole to be inserted. The protector mounting reinforcing member 11 is inserted in a state where the outer surfaces of the folded plates 11 b and 11 b of the protector mounting reinforcing member 11 are in close contact with the inner surface 10 b of the protector member 10.
[0023]
Then, the protector member 10 having the protector mounting reinforcing member 11 inserted and arranged at a predetermined position is aligned and brought into close contact with the protector mounting plate 6 of the stays 3 and 3. With the protector member 10 positioned, the bolt 7 is screwed into the nut 8 through a bolt insertion hole 9 formed in the protector mounting plate 6 as shown in FIGS. At this time, since the insertion position of the bolt 7 and the arrangement position of the nut 8 coincide with each other as described above, the bolt 7 can be easily attached only by aligning the mounting hole formed in the protector member 10 with the bolt insertion hole 9. It can be screwed into the nut 8. Further, since the nut 8 is fixed (welded) to the folded plates 11b and 11b in advance, it is not necessary to screw the bolt 7 while pressing the nut 8.
[0024]
Thus, if the protector member 10 into which the protector attachment reinforcing member 11 is inserted is fixed to the stays 3 and 3 with the bolts 7 and the nuts 8, the troublesome work such as welding the protector member 10 and the stays 3 and 3 is performed. The front underrun protector 1 can be easily fixed to the vehicle body frame 2 without doing so, and the number of work steps can be greatly reduced. Moreover, when a passenger vehicle collides with the front under-run protector 1, the protector attachment reinforcement member 11 becomes a reinforcement member, and the bending deformation of the protector member 10 is suppressed. Furthermore, since the protector mounting reinforcing member 11 is wider than the width of the protector mounting plate 6, the vicinity of the fixing portion of the protector member 10 is hardly bent and deformed, and the strength of the protector member 10 is improved.
[0025]
Since the protector mounting reinforcing member 11 functions as a reinforcing member for the protector member 10, even the protector member 10 of the present embodiment in which a thin steel plate is bent and formed is necessary for the front underrun protector 1. It performs well. For example, as shown in FIG. 7, it is possible to form protector members 15 and 16 in which reinforcing plates 14 and 18 are formed by extrusion molding of an aluminum material. However, as in the present embodiment, the stay 3 If the protector mounting reinforcing member 11 is prepared only for the portion fixed to 3, the protector member 10 formed by bending a steel plate can be made cheaper.
[0026]
Although specific embodiments to which the present invention is applied have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.
[0027]
For example, in the above-described embodiment, the gap S is provided between the distal end portion 13 of the protector mounting reinforcing member 11 and the inner surface 10a inside the protector member. However, the distal end portion 13 is brought into contact with the inner surface 10a. May be.
[0028]
Moreover, in the above-mentioned embodiment, although the protector attachment reinforcement member 11 was made into the substantially V shape, the shape of this protector attachment reinforcement member 11 is good also as a shape as shown, for example in FIG. The protector mounting reinforcing member 17 in FIG. 6 has a substantially distal end portion 17a and side plates 17b and 17b that are substantially U-shaped in cross section rising from both ends of the distal end portion 17a, and the side plates 17b and 17b. The flange plates 17c and 17c to which the nut 8 is welded and fixed from the front end to the outside are integrated.
[0029]
The protector mounting reinforcing member 17 is also formed in a size that can be smoothly inserted into the protector member 10 without rattling, as with the protector mounting reinforcing member 11. Further, a gap is provided between the distal end portion 17a of the protector mounting reinforcing member 11 and the inner surface 10a of the protector member 10 so that the protector member 10 is not bent and deformed and can be smoothly inserted into the interior. Therefore, when the protector attachment reinforcing member 11 shown in FIG. 6 is used, the same effects as those of the previous embodiment can be obtained.
[0030]
【Effect of the invention】
The present invention is implemented in the form as described above, and has the following effects.
[0031]
According to the present invention, since the protector mounting reinforcing member to which the coupled member is fixed is inserted into the protector member, the protector member can be attached only by a simple operation of simply inserting and engaging the coupled member with the coupled member. It can be easily fixed to the stay, and the installation work of the front underrun protector can be simplified.
[0032]
Further, according to the present invention, since the protector mounting reinforcing member is inserted into the protector member, the protector mounting reinforcing member functions as a reinforcing member, and it is difficult to bend and deform even when a passenger car or the like collides with the front under-run protector. Thus, the strength in the vicinity of the fixed portion of the front underrun protector can be increased.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example in which a protector member in which a protector mounting reinforcing member is inserted into a stay provided in a vehicle body frame is fixed with a bolt and a nut.
FIG. 2 is an enlarged perspective view of a main part showing an enlarged fixed part of the front under-run protector.
FIG. 3 is a side view showing an example in which a front under-run protector in which a protector mounting reinforcing member is inserted into a stay provided on a vehicle body frame is fixed with a bolt and a nut.
4 is an enlarged side view of the main part of FIG. 3;
5 is a further enlarged side view of the main part of FIG. 3 showing a state in which there is a gap between the protector mounting reinforcing member inserted into the front under-run protector and the inner surface.
FIG. 6 is an enlarged side view of an essential part showing another example of a protector mounting reinforcing member.
FIG. 7 is an example of a protector mounting reinforcing member provided with a reinforcing plate portion by extrusion molding of an aluminum material.
FIG. 8 is a perspective view showing an example in which a conventional front underrun protector is fixed to a vehicle body frame via a stay.
[Explanation of symbols]
1 Front underrun protector 2 Body frame 3 Stay 6 Protector mounting plate 7 Bolt 8 Nut 10 Protector member 11 Protector mounting reinforcing member 12 Opening

Claims (1)

A front underrun protector fixed to a vehicle body frame via a stay,
A hollow protector member having a mounting hole, extending in the vehicle width direction and fixed to the mounting portion of the stay;
The length in the vehicle body vertical direction is substantially the same as the vertical length inside the protector member in the vertical direction, and a protector mounting reinforcing member inserted into the protector member,
A coupled member fixed in contact with the protector mounting reinforcing member;
A coupling member that is inserted into and engaged with the coupled member through the mounting hole and fixes the protector member to the mounting portion of the stay;
Adhering one side of the protector mounting reinforcement member to the inner surface of the protector member at the rear of the vehicle body,
The other side of the protector mounting reinforcement member is brought into contact with or close to the inner surface of the protector member in front of the vehicle body,
The coupled members are fixed to the one side portion above the other side portion in the vehicle body vertical direction and the one side portion below the other side portion in the vehicle body vertical direction, respectively .
The protector mounting reinforcing member includes an upper inclined plate extending from the other end portion to an upper end of the one side portion above the other side portion, and a lower portion from the other end portion to the lower end portion. A lower inclined plate extending to the lower end of the one side,
The front under-run protector is characterized in that the upper inclined plate and the lower inclined plate are formed in a V shape having the other end as a vertex in a cross section of the vehicle vertical direction along the vehicle longitudinal direction. .

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