JP2012111273A - Submerging prevention device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent submerging of other vehicles using front tires on collision of a vehicle with other vehicles.SOLUTION: A device of the vehicle 1 includes a front under-run protector 4, a protector movement regulating body 7, a rotating body 14, rotor bracket 16, upper and lower holding units 22, 32 and ECU 44, etc. The protector movement regulating body 7, which is supported by rear face of the end of the front under-run protector 4, has a front tire contact face 10a and rotating body contact face 11a. The rotating body 14 is supported on the lower part of the rotor bracket 16. Until the ECU 44 determines that it is the time of development that collision of the vehicle 1 with other vehicle is highly likely, the rotating body 14 is supported apart from the front face 12a of a front tire 12. When the ECU 44 determines that it is the time of development that collision of the vehicle 1 with other vehicle is highly likely, the rotating body 14 is supported at the position of making a surface contact with the front face 12a of the front tire 12.

Description

  The present invention relates to an anti-roll-in device when a vehicle collides with another vehicle.

  Japanese Patent Application Laid-Open No. 2002-274300 discloses a front under which is disposed in the lower front portion of a vehicle such as a large truck and prevents other vehicles from getting caught under a chassis when a frontal collision with another vehicle such as a normal passenger car occurs. The mounting structure of the run protector is described. In this structure, the mounting stay is fixed to the main frame of the vehicle, and the front underrun protector is fixed to the lower front side of the mounting stay. An elevating step is fixed to the lower rear side of the mounting stay, and the rear portion of the elevating step is located at a predetermined interval in front of the front tire. When another vehicle collides with the front underrun protector and the mounting stay is greatly deformed rearward, the rear part of the lifting step collides with the front tire, and the impact of the other vehicle is absorbed by the elastic force of the front tire. In addition, the publication describes that a lifting step may be fixed to the front underrun protector.

JP 2002-274300 A

  However, in the structure described in Japanese Patent Application Laid-Open No. 2002-274300, if the front tire rotates without stopping completely when contacting the lifting step, a dynamic frictional force is generated between the rear portion of the lifting step and the front tire. The rear part of the lifting / lowering step receives a force in the rotational direction of the front tire and may be deformed downward and fall. If the rear part of the raising / lowering step falls, the rear part of the raising / lowering step is not supported by the front tire, and collision energy may not be absorbed using the front tire. In addition, if the rear part of the lifting / lowering step falls, the mounting stay can be further rearwardly deformed, and the load resistance of the front underrun protector fixed to the mounting stay is reduced, so that the other vehicles can be sufficiently caught. It may not be possible to prevent.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tripping prevention device that can reliably prevent tripping of another vehicle using a front tire.

  In order to achieve the above object, a vehicle anti-roll-in device according to the present invention comprises a front underrun protector, a protector movement restricting body, a determining means, a rotating body, a rotating body support means, and a control means. Prepare. The front underrun protector is supported by a lower front end of the vehicle and extends in the vehicle width direction. The protector movement restricting body is supported by the side of the vehicle behind the front under-run protector and extends in the front-rear direction, from the front surface close to or in contact with the front under-run protector, the rear surface facing the front surface of the front tire, and the rear surface And a rotating body contact surface facing the front surface of the front tire at the front lower side. The determination means determines whether or not the vehicle is in a deployed state where there is a high possibility of a collision between the vehicle and another vehicle. The rotator support means is supported by the vehicle and is between a first state in which the rotator is supported at a first position separated from the front surface of the front tire, and between the front surface of the front tire and the rotator contact surface of the protector movement restricting body. Thus, it can be set to the second state in which the rotating body is rotatably supported at the second position in surface contact with the front surface of the front tire, and the state shifts to the second state by releasing the first state. The control means maintains the rotating body support means in the first state until the determination means determines that it is in the deployed state, and when the determination means determines that it is in the expanded state, the control means of the rotating body support means Cancel the first state.

  In the above configuration, the rotating body support unit is maintained in the first state until the determination unit determines that the vehicle is in a deployed state where the possibility of a collision with another vehicle is high. Since the rotating body in the first state is supported at the first position separated from the front tire, the fuel consumption is not increased due to the contact between the rotating body and the front tire, and the steering operation of the front tire is performed. There is no hindrance.

  When the determination means determines that the vehicle is in a deployed state where the possibility of a collision with another vehicle is high, the first state of the rotating body support means is released, and the rotating body support means shifts to the second state. The rotating body in the second state is supported at a second position between the front surface of the front tire and the rotating body contact surface of the protector movement restricting body and in surface contact with the front surface of the front tire.

  When the vehicle collides with another vehicle, the end of the front underrun protector deforms rearward of the vehicle and presses the front surface of the protector movement restricting body, and when the protector movement restricting body moves rearward, the protector movement restricting body The rear surface contacts the front surface of the front tire. If the front tire is rotating without stopping completely at the time of this contact, a dynamic frictional force due to contact with the front surface of the front tire acts on the rear surface of the protector movement restricting body, and the rear surface of the protector movement restricting body is the front tire. It receives a downward force along the direction of rotation. At this time, since the rotating body is supported at the second position, the rotating body contact surface of the protector movement restricting body that has moved rearward of the vehicle comes into contact with the rotating body from the front, and the rotating body is in contact with the rotating body contact surface. It is driven and rotated by the front tire while being sandwiched between the front tire and the front. Since the rotating body rotates in the direction opposite to the front tire, a dynamic frictional force due to contact with the rotating body acts on the rotating body contact surface of the protector movement restricting body, and the protector movement restricting body is in the rotational direction of the rotating body. Receive upward force along This upward force reduces the downward force acting on the rear part of the protector movement restricting body, so that the downward deformation of the rear part of the protector movement restricting body is suppressed, and the rear part of the protector movement restricting body is prevented from falling. be able to.

  As a result, since the movement of the protector movement restricting body to the rear of the vehicle is restricted, a decrease in the load resistance of the front underrun protector is suppressed, and the front underrun protector can reliably prevent the other vehicles from getting caught. it can. Further, since the protector movement restricting body is reliably supported by the front surface of the front tire, the collision energy can be absorbed by the elastic force of the front tire.

  In this way, the rear portion of the protector movement restricting body that moves rearward in the event of a collision between the vehicle and another vehicle is prevented, and the rear surface of the protector movement restricting body is reliably supported by the front surface of the front tire. It is possible to reliably prevent the vehicle from getting caught.

  The front underrun protector may support the front surface of the protector movement restricting body. In the above configuration, the force due to the collision is directly applied to the protector movement restricting body via the front under-run protector, so that the other vehicles can be prevented from getting caught quickly and reliably.

  In the above anti-roll-in device, the rotating body support means may include a rotating body support member, a first holding means, and a second holding means. The rotating body support member is slidable in the vertical direction. The first holding means holds the rotating body support member releasably in the first state. The second holding means holds the rotating body support member in the second state moved downward from the first state. The rotating body is rotatably supported by the lower part of the rotating body support member. When the first state is released, the first holding means releases the rotating body support member, and the rotating body support member falls and shifts to the second state.

  In the above configuration, since the rotating body support means shifts from the first state to the second state when the rotating body support member falls, the rotating body support means has a special drive for shifting from the first state to the second state. No source is required. Therefore, the structure of the rotating body support means can be simplified.

  Further, the second holding unit may include a biasing unit that biases the rotating body support member rearward. In the above configuration, the rotating body that has moved to the second position is urged by the urging means, contacts the front surface of the front tire, and is rotated by the front tire. That is, the rotating body is driven to rotate by the front tire regardless of whether or not the rotating body contact surface of the protector movement restricting body is in contact with the rotating body. Accordingly, when the rotor contact surface of the protector movement restricting body moves rearward due to the occurrence of a collision, the rotor contact surface comes into contact with the already rotating body, so that an upward force can be immediately applied to the rotor contact surface. The downward force acting on the rear portion of the protector movement restricting body can be quickly reduced.

  According to the present invention, at the time of a collision with another vehicle, it is possible to prevent the rear portion of the protector movement restricting body from falling using the front tire and reliably prevent the other vehicle from getting caught.

It is a side view which shows the state until the time of expansion | deployment of the front part of the vehicle provided with the penetration prevention apparatus of this embodiment. It is a side view which shows the state at the time of expansion | deployment of the vehicle of FIG. It is a side view which shows the state at the time of the collision of the vehicle of FIG. It is a perspective view which shows a rotary body bracket and a rotary body. It is a block diagram which shows the principal part of the vehicle of FIG. It is a flowchart which shows a collision determination process and a rotary body control process.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, the front-rear direction means the front-rear direction of the traveling direction of the vehicle, and the left-right direction means the left-right direction in a state of facing the front of the traveling direction of the vehicle.

  As shown in FIG. 1, a cab overtrack (vehicle) 1 according to this embodiment includes a cab 2, a main frame 3, a front underrun protector (hereinafter referred to as FUP) 4, and a front underrun protector bracket (hereinafter referred to as FUP). , Referred to as an FUP bracket) 5, a front tire 12, and the like.

  The main frame 3 extends in the vehicle front-rear direction on both sides of the vehicle 1 in the vehicle width direction, and the front end portions of the left and right main frames 3 are connected by cross members. A pair of left and right FUP brackets 5 extending downward are fixed to the front end of the main frame 3. The FUP 4 has a rectangular cylindrical shape, is fixed to the front surface of the FUP bracket 5 and extends in the vehicle width direction. A front bumper 6 that covers the front end of the FUP 4 is provided at the front of the vehicle.

  The anti-roll-in device of this embodiment includes the FUP 4, the protector movement restricting body 7, the rotating body 14, the rotating body bracket (rotating body supporting member of the rotating body supporting means) 16, and the upper holding unit (the first of the rotating body supporting means). (Holding means) 22, a lower holding unit (second holding means for rotating body support means) 32, a radar sensor 43, and an ECU 44. The protector movement restricting body 7, the rotating body 14, the rotating body bracket 16, the upper holding unit 22, and the lower holding unit 32 are respectively arranged on the left and right sides of the front end portion of the vehicle 1, and the right side and the left side have the same configuration. Therefore, one (right side) will be described below, and the other (left side) will not be described.

  The protector movement restricting body 7 includes a main body 8, a front tire contact portion 10, and a rotating body contact portion 11. The main body 8 has a rectangular cylindrical shape that opens in the front and rear direction, the vertical length is substantially the same as the vertical length of the FUP 4, and the front end face (front face of the protector movement restricting body 7) 9 is the end of the FUP 4. It is fixed to the rear surface and extends in the front-rear direction. The front tire contact portion 10 has a plate shape in which the length in the vehicle width direction is substantially equal to the width of the main body 8 and the vertical length is longer than the vertical length of the rear end portion of the main body 8. The rear opening of the main body 8 is closed by being fixed to the rear end. The rear surface of the front tire contact portion 10 (the rear surface of the protector movement restricting body 7) 10 a faces the front surface 12 a of the front tire 12. The lower end of the front tire contact portion 10 is in the same plane as the lower surface of the protector movement restricting body 7, and the upper end of the front tire contact portion 10 protrudes from the upper surface of the protector movement restricting body 7. When the body 7 moves rearward, it makes surface contact with the front surface 12a of the front tire 12 in a wide range. The rotating body contact portion 11 has a plate shape extending downward from the lower surface of the protector movement restricting body 7 between the front end surface 9 of the protector movement restricting body and the front tire contact portion 10, and faces the front surface 12 a of the front tire 12. is doing. The length of the rotating body contact portion 11 in the vertical direction is longer than the radius of the rotating body 14 and shorter than the distance between the lower surface of the protector movement restricting body 7 and the road surface. Further, the distance from the rear surface 10 a of the front tire contact portion 10 to the rear surface 11 a of the rotator contact portion 11 is shorter than the outer diameter of the rotator 14.

  When a collision load is input to the protector movement restricting body 7 via the FUP 4 and the movement of the protector movement restricting body 7 is restricted to the rear when the vehicle 1 collides forward, the protector movement restricting body 7 The rearward movement is restricted, and the decrease in the load resistance of the FUP 4 is suppressed. Further, when the protector movement restricting body 7 is crushed and deformed, the collision energy input to the protector movement restricting body is efficiently absorbed.

  The rotating body 14 has a cylindrical shape that is long in the width direction, and integrally includes a rotating shaft 15 that extends on the axis of the cylinder. The outer diameter of the rotating body 14 is smaller than the distance between the rear surface 10a of the front tire contact portion 10 of the protector movement restricting body 7 and the front surface 12a of the front tire 12 facing the front tire 12 along the front surface 12a of the front tire 12. It is possible to move from the top to the bottom.

  As shown in FIG. 4, the rotating body bracket 16 includes a bracket body 17, a stopper 18, and an arm portion 19. The bracket body 17 has a cylindrical shape extending linearly in the vertical direction. The stopper 18 has a disk shape with an outer diameter larger than the outer diameter of the bracket body 17, and is located at the upper end of the bracket body 17 at a position where the center of the stopper 18 and the center of the bracket body 17 substantially coincide with each other. It is fixed to the shape. The arm portion 19 is formed from a plate-like member having substantially the same width as the outer diameter of the bracket body 17. The upper portion 19 a of the arm portion 19 extends in the width direction, and the center portion is fixed to the lower end of the bracket body 17. Both end portions of the upper portion 19a are bent downward and extend opposite to each other, and open downward to form a substantially U shape. A bearing 20 of the rotating body 14 is fixed to the opposite lower end portions 19b. The rotating body 14 is rotatably supported by the arm portion 19 by inserting both end portions of the rotating shaft 15 into the bearing 20. The upper portion 19a of the arm portion 19 is separated from the rotating body 14 and functions as an insertion portion 21 at the rear portion of the protector movement restricting body 7 described later.

  The upper holding unit 22 includes an upper front holding plate 23, an upper rear holding plate 27, a front air cylinder 24, and a rear air cylinder 28. The upper front holding plate 23 has a rectangular plate shape extending in the front-rear direction, and has a semicircular recess opening in the rear direction. The upper rear holding plate 27 has a rectangular plate shape extending in the front-rear direction, and has a semicircular recess opening in the front direction. When the rear end portion of the upper front holding plate 23 and the front end portion of the upper rear holding plate 27 are in contact with each other on the same plane, a circular upper guide hole 31 is formed at the center. The inner diameter of the upper guide hole 31 is smaller than the outer diameter of the stopper 18 of the rotating body bracket 16 and larger than the outer diameter of the bracket body 17. The upper front holding plate 23 and the upper rear holding plate 27 are supported at both ends in the vehicle width direction so as to be movable in the front-rear direction on the same plane by a pair of left and right guide rails (not shown) extending in the front-rear direction. . The guide rail is fixed at a position in the width direction, which is an upper portion of the vehicle body side portion of the vehicle 1 and in which the center of the upper guide hole 31 on the guide rail substantially coincides with the center of the front tire 12 in the width direction.

  The front air cylinder 24 includes a front cylinder body 25 and a front shaft 26. The front cylinder body 25 has a cylindrical shape, and is supported in the vehicle body side portion of the vehicle 1 in front of the upper front holding plate 23 and extends in the front-rear direction. The front shaft 26 is movably inserted into the front cylinder body 25, moves rearward when the front air cylinder 24 is extended (when air is supplied), and moves forward when it is shortened (when air is exhausted). The rear end of the front shaft 26 is connected to the front end of the upper front holding plate 25. The rear air cylinder 28 has the same structure as the front air cylinder 24, and the rear cylinder body 29 is supported by the vehicle body side portion of the vehicle 1 behind the upper rear holding plate 27 and extends in the front-rear direction. . The front end of the rear shaft 30 is connected to the rear end portion of the upper rear holding plate 27. An air pipe (not shown) for supplying compressed air is connected to the cylinder bodies 25 and 29, and an air supply valve and an exhaust valve (not shown) are provided in the air pipe. When the exhaust valve is closed and the air supply valve is opened, the compressed air is supplied to the cylinder bodies 25 and 29, and the front air cylinder 24 and the rear air cylinder 28 are in the most extended state. When the air supply valve is closed and the exhaust valve is opened, the compressed air in the cylinder bodies 25 and 29 is exhausted, and the front air cylinder 24 and the rear air cylinder 28 are in the most contracted state. In normal times, both the air supply valve and the exhaust valve are closed, and the air cylinders 24 and 28 maintain a state corresponding to the air pressure in the cylinder.

  When the front air cylinder 24 and the rear air cylinder 28 are in the most extended state, the rear end portion of the upper front holding plate 23 and the front end portion of the upper rear holding plate 27 are in contact with each other, and the upper guide hole 31 is formed. When the front air cylinder 24 and the rear air cylinder 28 are in the most contracted state, the opposite end portions of the upper front holding plate 23 and the upper rear holding plate 27 are separated from the outer diameter of the stopper 18 of the rotating body bracket 16.

The lower holding unit 32 includes a lower holding plate 33 and a spring unit (biasing means for second holding means) 36. The lower holding plate 33 has a length of each side longer than the outer diameter of the stopper 18 of the rotating body bracket 16 and a lower guide hole having an inner diameter larger than the outer diameter of the bracket body 17 and smaller than the outer diameter of the stopper 18 at the center. 35 is a rectangular plate shape.
The lower holding plate 33 is lower rearward than the upper holding unit 22, and at the position in the width direction where the center of the lower guide hole 35 and the center of the front tire 12 in the width direction substantially coincide with each other, the upper front holding plate 23. And it is fixed to the vehicle body side portion of the vehicle 1 in parallel with the upper rear holding plate 27. The lower guide hole 35 is located behind the upper guide hole 31.

  The spring unit 36 includes a coil spring 37, a housing 38, a rotating body bracket contact plate 39, and a solenoid 40. The housing 38 has a cylindrical shape having an inner diameter larger than the outer diameter of the coil spring 37 and extending in the front-rear direction. The housing 38 is a vehicle body side portion of the vehicle 1 below the lower holding unit 32 and is fixed at a position in the width direction where the center of the cylinder and the center of the front tire 12 in the width direction substantially coincide with each other. The coil spring 37 is inserted into the housing 38 from the rear, and one front end of the coil spring 37 is fixed to the front end of the cylindrical inner surface of the housing 38. A rotating body bracket contact plate 39 is fixed to the other rear end of the coil spring 37. The rotating body bracket contact plate 39 is a circular plate having an outer diameter smaller than the inner diameter of the housing 38. On the upper side surface of the rotating body bracket contact plate 39, there is an engagement hole 39b into which a plunger 42 of a solenoid 40 described later is inserted. The rear surface 39 a of the rotating body bracket contact plate 39 contacts the bracket body 17 of the rotating body bracket 16 when the coil spring 37 is extended. The solenoid 40 includes a solenoid body 41 and a plunger 42 that is movably inserted into the solenoid body 41. The solenoid 40 is fixed to the upper rear end of the housing 38, and the plunger 42 moves in the vertical direction through a through hole provided in the upper rear end of the housing 38. When the solenoid 40 is in a non-excited state, the plunger 42 protrudes from the solenoid body 41, and when the solenoid 40 is in an excited state, the plunger 42 moves in the direction of the solenoid body 41.

  The spring unit 36 can be set to a non-operating state or an operating state. In the non-operating state, the coil spring 37 is compressed and accommodated inside the housing 38, and the rotating body bracket contact plate 39 is located at the rear end of the housing 38. The solenoid 40 is in a non-excited state, and the plunger 42 is engaged with the engagement hole 39b of the rotating body bracket contact plate 39, so that the backward movement of the rotating body bracket contact plate 39 is restricted. In the operating state, the solenoid 40 is excited and the spring unit 36 is in the extended state. That is, the plunger 42 moves in the direction of the solenoid body 41, the engagement with the engagement hole 39b of the rotating body bracket contact plate 39 is released, and the coil spring 37 extends. The rotating body bracket contact plate 39 is urged by the coil spring 37 and moves rearward. The spring used for the spring unit 36 is not limited to the coil spring 37, and for example, a leaf spring or the like may be used.

  The radar sensor 43 transmits an electromagnetic wave such as a laser or a millimeter wave at a predetermined time from the front end portion of the vehicle 1 within a predetermined angle range in the traveling direction, and receives the reflected wave. 1 and the relative speed RV (m / s) are detected, and the detected inter-vehicle distance L and relative speed RV are output to the ECU 44.

  The ECU 44 includes a CPU (Central Processing Unit) 45, a ROM (Read Only Memory) 46, and a RAM (Random Access Memory) 47. The CPU 45 functions as a determination unit and a control unit by reading a program stored in the ROM 46 and executing processing described later. The RAM 47 has a storage area for storing a threshold value Tc for determining the level of collision possibility.

  Next, support and movement of the rotating body will be described.

  In the first state in which the rotating body bracket 16 is held by the upper holding unit 22, the front air cylinder 24 and the rear air cylinder 28 of the upper holding unit 22 are in the most extended state, and the upper holding unit 22 has an upper guide hole. 31 is formed. The stopper 18 of the rotating body bracket 16 is supported by the upper surfaces of the upper front holding plate 23 and the upper rear holding plate 27, and the bracket body 17 passes through the upper guide hole 31 and the lower guide hole 35. The bracket body 17 is vertically positioned on the center line of the front tire 12 in the width direction, and movement in the front-rear direction, the left-right direction, and the downward direction is restricted, and the rotating body 14 is separated from the front surface 12 a of the front tire 12. Supported in the first position. The rotating shaft 15 of the rotating body 14 is substantially parallel to the front surface 12 of the front tire 12. Since the lower guide hole 35 is located behind the upper guide hole 31, the rear end of the rotating body 14 is located behind the frontmost end of the front tire 12. The spring unit 36 is in an inoperative state, and the rotating body bracket contact plate 39 is located at the rear end portion of the housing 38 and does not hinder the sliding movement of the rotating body bracket 16.

  When the front air cylinder 24 and the rear air cylinder 28 of the upper holding unit 22 are in the most contracted state, the first state is released, and the rotating body bracket 16 slides downward in the lower guide hole 35 of the lower holding unit 32. To do. Since the rearmost end of the rotating body 14 is located behind the frontmost end of the front tire 12, the rotating body 14 contacts the upper portion of the front tire 12, moves downward along the front surface 12a of the front tire 12, and moves to the front tire. 12 and the front tire contact surface 10 of the protector movement restricting body 7 pass through. When the stopper 18 is locked on the upper surface of the lower holding plate 33 and the rotating body bracket 16 is held in the lower holding unit 32, the rotating body is positioned below the front end of the front tire 12 and the front surface of the front tire 12. It is supported at the second position where the surface comes into contact. At this time, when the spring unit 36 is in an activated state, the rotating body bracket contact plate 39 moves rearward and contacts the bracket body 17 of the rotating body bracket 16 to urge the rotating body bracket 16 rearward. As a result, the rotating body 14 is pressed against the front surface 12a of the front tire 12, and the movement in the front-rear direction is restricted.

  Next, processing executed by the ECU 44 will be described based on the flowchart of FIG. This process is performed according to the result of the collision determination process (step S1 to step S3) for determining the time of deployment based on the level of the risk of collision between the vehicle 1 and another preceding vehicle, and the result of the collision determination process. It comprises a rotating body control process (step S4 to step S8) for controlling the position, and is repeatedly executed at predetermined time intervals. First, the ECU 44 acquires an inter-vehicle distance L and a relative speed RV between the vehicle 1 and another preceding vehicle from the radar sensor 43 (step S1). Next, the ECU 44 calculates the expected collision time TTC (s) according to the following equation (1) (step S2).

  TTC = L / RV (1)

  Next, the ECU 44 compares the TTC calculated in step S2 with a preset threshold value Tc of the predicted collision time (step S3). If the predicted collision time TTC exceeds Tc, it is determined that the possibility of a collision between the vehicle 1 and another preceding vehicle is low, and this process is terminated. If the predicted collision time TTC is equal to or shorter than Tc, it is determined that the vehicle 1 and the other preceding vehicle have a high possibility of collision, and the process proceeds to step S4.

  In step S4, the ECU 44 sends a control signal to the upper holding unit 22 to bring the front air cylinder 24 and the rear air cylinder 28 into the most contracted state. As a result, the first state of the rotating body bracket held by the upper holding unit 22 is released, and the rotating body bracket 16 falls freely. In order to prevent the coil spring 37 of the spring unit 36 from extending and obstructing the movement of the rotating body 14 and the rotating body bracket 16 during the movement of the rotating body bracket 16, the ECU 44 ensures a predetermined moving time. That is, the ECU 44 sets the time counter I to the predetermined value n in step S5. In step S6, it is determined whether or not the count value of counter I is 0 or less. If it exceeds 0, the value of counter I is decremented by 1 (step S7), and the process returns to step S6. If the count value of the counter I is less than or equal to 0, the predetermined movement time has elapsed and the process proceeds to step S8. During this time, the rotator bracket 16 moves downward and shifts to the second state held by the lower holding portion 32. The rotating body 14 is supported at a second position in surface contact with the front surface 12 a of the front tire 12.

  Next, the ECU 44 sends a control signal to the spring unit 36 and excites the solenoid 40 to put the spring unit 36 into an operating state (step S8). The rotating body bracket contact plate 39 comes into contact with the rotating body bracket 16 and urges backward, and the rotating body 14 is pressed against the front surface 12 a of the front tire 12. As a result, the rotating body 14 is driven to rotate in the opposite direction to the front tire 12 (FIG. 2). Thus, the ECU 44 ends the process.

  The collision determination process is not limited to the present embodiment as long as it can determine whether the collision risk is high or low. For example, a camera or the like may be mounted on the vehicle 1 and image processing or the like may be performed together.

  In the present embodiment, until the ECU 44 determines that the vehicle 1 and another vehicle have a high possibility of collision, the rotating body bracket 16 is moved to the first position by the upper holding unit 22 as shown in FIG. The rotating body 14 is supported in a first position that is separated from the front tire 12. Accordingly, there is no increase in fuel consumption due to the contact between the rotating body 14 and the front tire 12, and there is no hindrance to the steering operation of the front tire 12.

  If the ECU 44 determines that the vehicle 1 and another vehicle have a high possibility of a collision, the upper holding unit 22 releases the holding of the rotating body bracket 16 as shown in FIG. The rotating body bracket 16 falls freely and shifts to the second state where it is held by the lower holding unit 32. The rotating body 14 is supported at a second position in surface contact with the front surface 12 a of the front tire 12. Further, the rotating body 14 is pressed against the front surface 12 a of the front tire 12 by the spring unit 36, and the rotating body 14 rotates in the direction opposite to the front tire 12 following the rotation of the front tire 12.

  When another vehicle collides with the front surface of the vehicle 1, as shown in FIG. 3, the end of the FUP 4 is deformed rearward of the vehicle and presses the front surface of the protector movement restricting body 7. Move backwards. By this movement, the rear end portion of the protector movement restricting body 7 is inserted through the opening 21 of the arm portion 19 of the rotating body bracket 16 held in the second state, and the rear surface 9a of the front tire contact portion 9 is the front tire. 12 is in contact with the front surface 12a. If the front tire 12 rotates without stopping completely at the time of this contact, a dynamic frictional force acts between the rear surface 10a of the front tire contact portion 10 and the front surface 12a of the front tire 12, and the front tire contact portion 10 Receives a downward force along the rotational direction of the front tire 12. Further, since the distance between the rear surface 10 a of the front tire contact portion 10 and the rear surface 11 a of the rotating body contact portion 11 is shorter than the outer diameter of the rotating body 14, the rear surface 10 a of the front tire contact portion 10 becomes the front surface 12 a of the front tire 12. When contacting, the rotating body contact surface 11 of the protector movement restricting body 7 also comes into contact with the rotating body 14 from the front. At this time, since the rotating body 14 rotates in the opposite direction to the front tire 12, a dynamic frictional force due to contact with the rotating body 14 acts on the rear surface 11 a of the rotating body contact surface 11 of the protector movement restricting body 7. The movement restricting body 7 receives an upward force along the rotation direction of the rotating body 14. This upward force reduces the downward force acting on the rear part of the protector movement restricting body 7, so that downward deformation of the rear part of the protector movement restricting body 7 is suppressed, and the rear part of the protector movement restricting body 7 falls. Can be prevented.

  As a result, since the movement of the protector movement restricting body 7 to the rear of the vehicle is restricted, a decrease in the load resistance of the FUP 4 can be suppressed, and the FUP 4 can reliably prevent the other vehicles from getting caught. Further, since the protector movement restricting body 7 is reliably supported by the front surface 12 a of the front tire 12, the collision energy can be absorbed by the elastic force of the front tire 12.

  Further, since the end portion of the FUP 4 supports the front surface of the protector movement restricting body 7, the force caused by the collision is directly applied to the protector movement restricting body 7 via the FUP 4 so that other vehicles can be quickly and reliably removed. Can be prevented.

  Further, the lower holding unit 32 includes a spring unit 36, and the coil spring 37 biases the rotating body bracket 16 rearward, thereby pressing the rotating body 14 supported at the second position against the front surface 12a of the front tire 12. . As a result, the rotating body 14 is driven to rotate in the opposite direction to the front tire 12 at the time of deployment before the collision between the vehicle 1 and another vehicle. Therefore, when the rotating body contact surface 11 of the protector movement restricting body 7 comes into contact with the rotating body 14 due to the occurrence of a collision, the upward force is immediately applied to the rotating body contact surface 11 by the rotating body 14 that has already been rotated. The downward force acting on the rear portion of the protector movement restricting body 7 can be quickly reduced.

  The upward force acting on the rotating body contact portion 11 by contact with the rotating body 14 driven and rotated by the front tire 12 is not sufficient to reduce the downward force acting on the rear portion of the protector movement restricting body 7. In this case, a motor or the like may be separately installed, and the upward force may be increased by actively rotating the rotating body 14.

  In addition, when the upward force acting on the rotating body contact portion 11 of the protector movement restricting body 7 is insufficient to reduce the downward force acting on the rear portion of the protector movement restricting body 7, the protector movement restricting body 7 There is a possibility that the rear part of the rear part is deformed downward, and the rear lower surface of the protector movement restricting body 7 is in contact with the rotating body 14. However, the rotating body 14 is supported by the rotating body bracket 16, and the rotating body bracket 16 is held by the lower holding unit 32 that is supported by the vehicle body side portion of the vehicle 1. Therefore, the downward deformation of the protector movement restricting body 7 is restricted by the rotating body 14, and the rear portion of the protector movement restricting body 7 can be prevented from falling.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, the protector movement restricting body 7 is not fixed to the rear surface of the end portion of the FUP 4, and another member (for example, the main frame 3) supported on the front vehicle body side in a state where the protector movement restricting body 7 is in proximity to or in contact with the FUP 4. The protector movement restricting body 7 may be fixed to the protector movement restricting body support bracket supported by the bracket.

  Further, the protector movement restricting body 7 is not limited to this embodiment, and for example, an energy absorbing member or the like may be used.

  In addition, although the two air cylinders 24 and 28 are used for the operation of the upper holding unit 22, the operation may be performed by one air cylinder in combination with a link mechanism or the like. Moreover, it is not limited to an air cylinder, For example, you may use a hydraulic cylinder, a linear motor, etc.

  Further, the switching of the spring unit 32 from the non-operating state to the operating state is not limited to the use of the solenoid 40.

  Further, the lower holding unit 32 may not have the spring unit 36. In this case, when the rotating body contact portion 11 of the protector movement restricting body 7 moved to the rear of the vehicle due to a frontal collision of the vehicle 1 comes into contact with the rotating body 14 from the front, the rotating body 14 becomes the rear surface 11a of the rotating body contact surface portion. And the front tire 12 between the front tire 12 and the front tire 12 from the front and rear, the front tire 12 rotates in the opposite direction.

  Further, the movement of the rotating body bracket 16 from the first state to the second state is not limited to the free fall of the rotating body bracket 16, but can be moved at a higher speed using a driving source such as an air cylinder. May be.

  In the present embodiment, one ECU 44 executes the collision determination process and the rotating body control process. However, the processing apparatus that executes the collision determination process and the processing apparatus that executes the rotating body control process are different from each other. You may comprise as a unit of. Therefore, for an existing vehicle equipped with a device that executes a collision determination process, a device (unit) that executes a rotating body control process may be added and installed. For such an existing vehicle, The present invention can be easily applied to prevent the rolling-in of other vehicles at the time of a forward collision.

  The present invention can be widely applied as a debris prevention device for large vehicles such as cargo vehicles.

1: Cab over truck (vehicle)
3: Main frame 4: Front underrun protector 5: Front underrun protector bracket 7: Protector movement restricting body

9: Front end face of the protector movement restricting body (front face of the protector movement restricting body)
10: Front tire contact portion 10a: Rear surface of front tire contact portion (rear surface of protector movement restricting body)
11: Rotator contact portion 11a: Rear surface 12 of rotator contact portion: Front tire 12a: Front surface of front tire 14: Rotator 16: Rotator bracket (Rotator support member of rotator support means)
18: Stopper 22: Upper holding unit (first holding means of rotating body support means)
23: Upper front holding plate 24: Front air cylinder 27: Upper rear holding plate 28: Rear air cylinder 32: Lower holding unit (second holding means of rotating body supporting means)
33: Lower holding plate 36: Spring unit (biasing means of second holding means)
37: Coil spring 39: Rotating body bracket contact plate 40: Solenoid 44: ECU (determination means and control means)

Claims (4)

A front underrun protector supported in the lower front end of the vehicle and extending in the vehicle width direction;
A front surface that is supported by a side portion of the vehicle behind the front underrun protector and extends in the front-rear direction, close to or in contact with the front underrun protector, a rear surface facing the front surface of the front tire, and a front side of the rear surface A protector movement restricting body having a rotating body contact surface facing the front surface of the front tire below;
Determining means for determining whether or not the vehicle and the other vehicle are in a deployed state with a high possibility of collision;
A rotating body,
Between the first state supported by the vehicle and supporting the rotating body at a first position separated from the front surface of the front tire, and between the front surface of the front tire and the rotating body contact surface of the protector movement restricting body. The rotating body support that can be set to a second state in which the rotating body is rotatably supported at a second position that is in surface contact with the front surface of the front tire, and that shifts to the second state when the first state is released. Means,
The rotating body support means is maintained in the first state until the determination means determines that it is in the unfolded state, and when the determination means determines that it is in the unfolded state, the rotating body support means And a control means for canceling the first state of the vehicle. The vehicle anti-roll-in device according to claim 1,
The front underrun protector supports the front surface of the protector movement restricting body. A vehicle anti-roll-in device according to claim 1 or 2,
The rotary body support means is a rotary body support member that is slidable in the vertical direction, a first holding means that releasably holds the rotary body support member in the first state, and a downward movement from the first state. Second holding means for holding the rotating body support member in the second state,
The rotating body is rotatably supported at a lower portion of the rotating body support member,
When the first state is released, the first holding means releases the rotating body support member, and the rotating body support member falls and shifts to the second state. Prevention device. A vehicle anti-roll-in device according to claim 3,
The second holding means includes an urging means for urging the rotating body support member rearward.

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