JP2016107647A - Collision body protective device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly prevent a secondary collision of a pedestrian to a road surface, when a vehicle and the pedestrian are collided.SOLUTION: Arm base end portions 21 of tilt arms 11 are disposed in the inside of arm storage grooves on both sides in a vehicle width direction of a front panel 3, and rotatably supported to a cab through brackets 23. A pedestrian protection net 12 is fixed at an arm tip end portion 28 of the tilt arm 11, and stored in a storage case 43 so as to be pulled out forward. If an ECU 16 determines that it is in a state which cannot avoid a collision with the pedestrian, actuates an inflator, and starts energization to a motor 13, the tilt arm 11 tilts from a storing position to an actuating position while shifting from a contraction state to an expansion state. When the tilt arm 11 tilts, the pedestrian protection net 12 is putted out forward from the storage case 43 by the tilt arm 11, and deployed between the pedestrian and a road surface 9 above the road surface 9 to receive the pedestrian.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle collision body protecting apparatus for preventing a secondary collision of a collision body on a road surface after a vehicle and a collision body collide.

  Patent Document 1 discloses a guide bar extending from a casing on a roof toward the front of the vehicle, a plurality of standing bars attached to the guide bar and standing, a protective net stretched over each standing bar, and a guide bar A collision object protection device is described which comprises a drive source for the extension operation. The collision object protection device deploys the protection net when the collision of the vehicle with the collision object such as a pedestrian is detected. The protection net in the unfolded state covers the vehicle engine hood and windshield from above. When the vehicle and the pedestrian collide, the pedestrian collides with the protective net.

  In Patent Document 2, a hinge with a spring is provided at the lower part of a large bumper at the front of the vehicle body, and this is attached to a bumper mounting arm so as to open forward, and a hinge with a spring is provided at the upper part of the bumper, A bumper with a rescue device for an automobile, in which a frame with a frame is attached to a spring hinge, is described. This bumper with a rescue device is usually folded on the inner side of the bumper and the bumper is fastened to the front grille.When the bumper is in operation, the bumper opens forward via a spring hinge at the bottom. The receiving net opens forward to catch pedestrians.

JP 2004-66900 A Japanese Patent Laid-Open No. 49-134033

  In the collision object protection device described in Patent Document 1, when a vehicle and a pedestrian collide, a protective net is deployed between the vehicle and the pedestrian, and the collision energy of the pedestrian that collides with the vehicle by the protective net is obtained. However, if the pedestrian jumps forward of the vehicle, the secondary collision of the pedestrian on the road surface cannot be prevented.

  In the bumper with a rescue device for an automobile described in Patent Document 2, when a vehicle and a pedestrian collide and the pedestrian is thrown forward of the vehicle, the framed receiving net is developed forward to receive the pedestrian. However, since the frame receiving net accommodated in the bumper is relatively short, a pedestrian may be jumped forward than the frame receiving net. In this case, a pedestrian's secondary collision on the road surface is prevented. I can't.

  Then, this invention aims at provision of the collision body protection apparatus which can prevent reliably the secondary collision of the pedestrian to a road surface when a vehicle and a pedestrian collide.

  In order to solve the above-described problem, a collision body protection device provided in a vehicle for protecting a collision body that has collided with a front collision surface portion of a vehicle body of the present invention includes a pair of left and right tilt arms and a sheet-like receiving member. And a collision detection means, a tilting means, and a control means. The left and right tilt arms have base end portions that are disposed on both sides of the colliding surface portion in the vehicle width direction and are supported so as to be rotatable with respect to the vehicle body around a rotation axis that extends in the vehicle width direction. Can be tilted between. In the storage position, the left and right tilt arms extend downward from the base end portion, and the distal end portion is disposed below the vehicle body. In the operating position, the left and right tilt arms rotate forward and upward from the storage position about the rotation axis, and the tip portion is disposed forward of the collision target surface portion. The sheet-shaped receiving member extends in the vehicle width direction between the vehicle body side edge portion that extends in the vehicle width direction below the vehicle body and is fixed to the vehicle body, and the distal end portions of the left and right tilt arms and extends to the distal end portion. In the state where the left and right tilting arms are disposed at the storage position, the left and right tilting arms are stored below the vehicle body so that they can be pulled out forward, and the left and right tilting arms reach the operating position. The vehicle is pulled forward from below the vehicle body and deployed above the road surface. The collision detection means detects the collision of the collision object with the collision target surface portion of the vehicle body. The tilting means tilts the left and right tilting arms. The control unit controls the tilting unit to tilt the left and right tilting arms from the storage position to the operating position when the collision detection unit detects a collision of the colliding body with the collision target surface portion. When the left and right tilt arms reach the operating position, the receiving member is deployed between the collision body that has collided with the collision target surface portion and the road surface, and receives the collision body.

  In the above configuration, when the collision detection means detects the collision of the pedestrian (collision body) with the collision surface portion of the vehicle body, the control means controls the tilting means, and the tilting means moves the left and right tilt arms from the storage position. Tilt to working position. When the left and right tilt arms reach the operating position, the receiving member is deployed between the collision body that has collided with the collision target surface portion and the road surface, and receives the collision body. Therefore, the pedestrian after the collision with the collision target surface portion Secondary collision with the road surface can be prevented.

  In addition, the arm-side edge of the receiving member extends in the vehicle width direction between the distal ends of the left and right tilt arms arranged below the vehicle body at the storage position, so that the left and right tilt arms are rotated from the storage position to the rotation shaft. As a result, the arm side edge of the receiving member moves from the lower side of the vehicle body to the front upper side. For this reason, since it is possible to scoop up the pedestrian's leg collided with the impacted surface portion by the arm side edge of the receiving member, the receiving member can be reliably deployed between the pedestrian and the road surface, It is possible to prevent the pedestrian from being caught below the vehicle body or dragging the pedestrian later.

  In addition, the collision body protection device may include arm extension means, and the left and right tilt arms include a support arm on the base end side and a slide arm on the tip end side that is slidably supported by the support arm. You may have. In this case, the arm elongating means is left and right in a contracted state in which the slide arm is slid in the contracting direction with respect to the support arm and in an extended state in which the slide arm is slid in the extending direction from the contracted state to the support arm. The tilt arm can be set. The left and right tilt arms are held in a contracted state by the arm extension means at the storage position. The control means controls the arm extending means so as to shift the left and right tilt arms from the contracted state to the extended state when the collision detecting means detects a collision of the colliding body with the collision target surface portion.

  In the above configuration, when the collision detection means detects the collision of the pedestrian (collision body) with the collision target surface portion, the control means controls the arm extension means to shift the left and right tilt arms from the contracted state to the extended state. Let For this reason, when the left and right tilt arms start to tilt from the stowed position to the operating position, the left and right tilt arms can be extended so that the distal ends of the left and right tilt arms are arranged near the road surface. The vicinity of the ankle close to the road surface of the pedestrian's leg can be scooped up by the arm side edge of the member. Thereby, when the left and right tilt arms are tilted, it is possible to reliably prevent the arm-side end edge of the receiving member from coming into contact with a relatively high position of the leg of the pedestrian and jumping the pedestrian forward. Therefore, the secondary collision with the road surface of a pedestrian can be prevented reliably.

  In addition, the collision body protection device includes a pair of left and right arm storage grooves that are disposed on both sides in the vehicle width direction of the collision target surface portion of the vehicle body and extend in the vertical direction while being recessed rearward from the front surface of the vehicle body. Also good. In this case, the base end portions of the left and right tilt arms are disposed inside the left and right arm storage grooves. The left and right tilt arms at the storage position extend downward from the base end portion inside the left and right arm storage grooves.

  In the above configuration, the left and right tilting arms at the storage position extend downward from the base end inside the left and right arm storage grooves that are recessed rearward from the front surface of the vehicle body. The protrusion of the tilt arm can be suppressed. For this reason, it is possible to suppress the appearance from deteriorating due to the left and right tilt arms at the storage position projecting forward from the front surface of the vehicle body.

  ADVANTAGE OF THE INVENTION According to this invention, when a vehicle and a pedestrian collide, the secondary collision of the pedestrian to a road surface can be prevented reliably.

It is a perspective view of the front part of a vehicle provided with the collision object protection device concerning this embodiment. It is II-II arrow sectional drawing of FIG. It is a side view of the collision object protection device concerning this embodiment. It is the schematic which looked at FIG. 3 from IV direction. It is sectional drawing of a tilting arm, (a) shows a contracted state and (b) shows an extended state, respectively. It is a perspective view which shows the state which the collision body protection apparatus of FIG. 1 act | operated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, IN indicates the inner side in the vehicle width direction, and the alternate long and short dash line CL indicates the axis of the rotation axis of the tilt arm described later. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward. Moreover, the white arrow of FIG.3 and FIG.5 (b) shows the expansion | extension direction of a tilting arm.

  As shown in FIG. 1, a truck (vehicle) 1 including a collision body protecting apparatus 10 according to the present embodiment has a cab over type truck 1 in which a cab (vehicle body) 2 is disposed generally above an engine (not shown). A front panel (impacted surface portion) 3 standing in a substantially vertical direction at the front end of the cab 2, a front window 4 disposed above the front panel 3, and a front bumper 5 disposed below the front panel 3. And have. A pair of left and right headlights 6 and a pair of left and right winkers 7 are arranged on both sides of the front panel 3 in the vehicle width direction.

  As shown in FIGS. 1 to 4, the collision body protection device 10 includes a pair of left and right arm storage grooves 17, a pair of left and right tilting arms 11, a pair of left and right actuators (arm extension means) 27, and a pedestrian protection net. (Receiving member) 12, a pair of left and right motors (tilting means) 13 (only the right motor is shown in FIG. 3), a front millimeter wave radar (collision detecting means) 14, and a front photographing camera (collision detecting means) 15 And a control unit (collision detection means, control means) 16 (hereinafter referred to as an ECU (Electric Control Unit)). A pair of left and right arm storage grooves 17, a pair of left and right tilting arms 11, a pair of left and right actuators, and a pair of left and right motors 13 are provided symmetrically on the left and right of the track 1, and have substantially the same configuration. Therefore, the left side will be described below, and the right side will be omitted.

  As shown in FIGS. 1 and 2, the arm storage groove 17 is a groove that continuously extends from the vicinity of the lower end edge of the front window 4 of the front panel 3 to the lower end of the front bumper 5. 3 and the front bumper 5 are disposed on both sides in the vehicle width direction and are recessed rearward from the front surface 3a of the front panel 3 and the like (including the front bumper 5). The arm storage groove 17 is partitioned inside a storage member 18 having a substantially U-shaped cross section that is fixed to the rear surface 3b (back surface) side of the front panel 3 or the like, and is open forward and downward. The arm housing groove 17 extends in the vertical direction between the headlight 6 and the winker 7. The arm storage groove only needs to have a long hole-like opening formed in the front panel 3 or the like extending in the vertical direction and a space behind the front panel 3 or the like, and does not include the storage member 18. May be. Further, the headlight 6 may be divided into two on the left and right, and the arm housing groove 17 may extend in the vertical direction between the two divided headlights.

  As shown in FIGS. 3 and 4, the tilting arm 11 is formed by a support arm 19 and a slide arm 20 that is slidably supported by the support arm 19. The support arm 19 is a rectangular cylindrical body extending so as to intersect with the vehicle width direction, and is an axis that protrudes from the arm base end portion (base end portion) 21 on the one end 36 (upper end in FIG. 4) side on both sides in the vehicle width direction. 24. The arm base end portion 21 is disposed inside the arm housing groove 17 and is connected to a rotation axis CL (in FIG. 4) that is the axis of the shaft 24 via a bracket 23 that is fixed to the inner panel 22 behind the front panel 3. (Indicated by a one-dot chain line). A worm wheel 25 around the rotation axis CL is fixed to the outer end of the shaft 24 in the vehicle width direction. The worm wheel 25 meshes with a cylindrical worm 40 described later to constitute a worm gear 41. The slide arm 20 is a rectangular cylindrical body formed slightly smaller than the support arm 19, and one end 37 (upper end in FIG. 4) side of the slide arm 20 is the other end 38 (lower end in FIG. 4). It is inserted into the support arm 19 from the side, and is slidably supported by the support arm 19. A net fixing shaft 26 for fixing the pedestrian protection net 12 protrudes outward in the vehicle width direction at an arm tip portion (tip portion) 28 on the other end 39 (lower end in FIG. 4) side of the slide arm 20. The tilting arm 11 extends downward from the arm base end portion 21 inside the arm storage groove 17, and a storage position (a position indicated by a solid line in FIG. 3) where the arm front end portion 28 is disposed in the vicinity below the front bumper 5. And an operating position (see FIG. 6) in which the arm tip portion 28 is disposed forward of the front panel 3 by rotating forward and upward about the rotation axis CL from the storage position. In the storage position, the front surface of the tilting arm 11 does not protrude forward from the front surface 3a of the front panel 3 or the like.

  As shown in FIGS. 5A and 5B, the outer surface of the slide arm 20 inserted into the support arm 19 on the one end 37 side protrudes toward the inner surface 19 a of the support arm 19. A stop projection 30 is formed. On the inner surface 19a on the other end 38 side of the support arm 19, a locking projection 29 that protrudes toward the outer surface 20a of the slide arm 20 is engaged, and the locking projection 29 is engaged with the arm base end 21 (see FIG. 4) side. A locking claw 31 is formed that is spaced apart with a gap of 30 minutes from the locking protrusion. The locking claw 31 of the support arm 19 is a direction in which the slide arm 20 extends the tilt arm 11 with respect to the support arm 19 (a direction indicated by a white arrow in FIGS. 3 and 5B. Hereinafter, simply referred to as an extension direction). ) To have the inclined surface that allows the locked projection 30 of the slide arm 20 to move in the extending direction. The locking projection 29 of the support arm 19 locks the locked projection 30 of the slide arm 20 that has been slid in the extending direction beyond the locking claw 31 of the supporting arm 19, and in the extending direction of the locked projection 30. Regulate slide movement. As shown in FIG. 5B, in the extended state where the locking projection 29 of the support arm 19 locks the locked projection 30 of the slide arm 20, the locking claw 31 of the support arm 19 is The sliding movement of the locked protrusion 30 in the direction in which the tilting arm 11 contracts relative to the support arm 19 (hereinafter simply referred to as the contracting direction) is restricted.

  As shown in FIGS. 5A and 5B, the actuator 27 is disposed inside the support arm 19 and fixed to the support arm 19, and is slidably supported by the cylinder 32. The piston 33 protrudes from the cylinder 32 toward the other end 38 of the support arm 19, an inflator 34 fixed to the cylinder 32, and a coil spring 35 disposed inside the cylinder 32. A protruding end 33 a of the piston 33 protruding from the cylinder 32 is fixed to the slide arm 20. The coil spring 35 is disposed between the wall 32 a of the cylinder 32 on the other end 38 side of the support arm 19 and the end 33 b of the piston 33 inside the cylinder 32. 27 is urged in the direction of contraction. That is, the coil spring 35 biases the slide arm 20 in the contracting direction with respect to the support arm 19 and holds the contracted state in which the tilting arm 11 contracts (see FIG. 5A). The inflator 34 is controlled by the ECU 16 to generate gas inside the cylinder 32 as will be described later. When the inflator 34 generates gas inside the cylinder 32, the piston 33 slides in a direction protruding from the cylinder 32 against the urging force of the coil spring 35 with respect to the cylinder 32, and the piston 33 slides relative to the cylinder 32. In conjunction with the movement, the slide arm 20 slides relative to the support arm 19 in the extending direction, and the tilting arm 11 shifts from the contracted state to the extended state. The tilting arm 11 in the storage position is held in a contracted state by the biasing force of the coil spring 35.

  As shown in FIGS. 3 and 4, the pedestrian protection net 12 is a mesh sheet formed in a lattice shape by a plurality of horizontal strings and vertical strings made of resin such as nylon, and the front bumper 5 (see FIG. 1). The vehicle is mounted on the inner end edge portion (vehicle body side edge portion) 44 fixed to the shaft member 42 extending in the vehicle width direction in the storage case 43 below and the net fixing shaft 26 of the arm tip portion 28 of the slide arm 20. It has the outer edge part (arm side edge part) 45 to which the width direction both ends are fixed. The storage case 43 has a horizontally long opening 47 extending in the left and right direction at the lower portion of the front plate 43 a of the storage case 43, and is fixed to the vehicle body frame 8 via the bracket 46. Both ends in the vehicle width direction of the shaft member 42 are rotatably supported by the side plates 43 b of the storage case 43. When the tilting arm 11 is disposed at the storage position, the pedestrian protection net 12 is stored in the storage case 43 so that it can be pulled forward while being wound around the shaft member 42 in a roll shape. The end edge 45 side protrudes from the horizontally long opening 47. When the tilting arm 11 is disposed at the operating position, the pedestrian protection net 12 is pulled out from the storage case 43 on the front lower side of the cab 2 toward the front of the front panel 3 and is expanded above the road surface 9. (See FIG. 6). Note that the pedestrian protection net 12 is not limited to a resin mesh sheet, and may be a cloth sheet, a urethane sheet, a rubber sheet, or the like without a hole. Further, in addition to the net fixing shaft 26 of the arm tip 28, an intermediate net fixing shaft extending between the left and right tilting arms 11 may be provided, and the outer end edge 45 of the pedestrian protection net 12 is connected to the net fixing shaft 26. And you may fix to the said intermediate | middle net fixed axis | shaft.

  The motor 13 is disposed above and behind the worm wheel 25 of the arm base end 21, fixed to the inner panel 22 behind the front panel 3 via a bracket 48, and connected to a battery power source (not shown). A cylindrical worm 40 having a helical gear on the outer peripheral surface is fixed to the tip of the output shaft 13a of the motor 13. The cylindrical worm 40 of the motor 13 and the worm wheel 25 of the arm base end portion 21 are engaged with each other to form a worm gear 41. When the motor 13 is energized, the cylindrical worm 40 is driven to rotate, the worm wheel 25 is driven to rotate, the rotational force of the motor 13 is transmitted to the tilting arm 11, and the tilting arm 11 is tilted from the storage position to the operating position. That is, the motor 13 functions as a tilting unit that tilts the tilting arm 11.

  The front millimeter wave radar 14 is provided at a substantially central portion in the vehicle width direction inside the front panel 3 of the cab 2 (see FIG. 1), and transmits a transmission wave, which is a continuous electromagnetic wave in the millimeter wave band, at a predetermined angle toward the front. Are repeatedly emitted at predetermined time intervals within a range of and receive a received wave that is a reflected wave from an object (such as a pedestrian) existing in front of the track 1. The forward millimeter wave radar 14 sequentially detects the distance from the front surface of the cab 2 to the object, the elevation angle, and the azimuth angle based on the front-rear direction, and outputs a signal including the detected information to the ECU 16.

  The front shooting camera 15 is provided at a substantially central portion in the vehicle width direction of the upper edge of the rear surface side of the front window 4 of the cab 2 (see FIG. 1), and sequentially moves a moving image within a predetermined angle range in front of the truck 1. The captured still image constituting the captured moving image is digitally converted and output to the ECU 16 as moving image information.

  The ECU 16 includes a CPU, a memory, and the like (not shown). The ECU 16 is configured with a track 1 based on a signal input from the front millimeter wave radar 14 and image information (hereinafter referred to as image information) input from the front photographing camera 15. It is determined whether or not a collision with a pedestrian (a collision object) cannot be avoided (hereinafter simply referred to as a condition where a collision cannot be avoided). For example, the ECU 16 obtains the estimated collision time between the track 1 and the pedestrian by acquiring the distance and relative speed with the pedestrian from the image information, etc., and dividing the distance by the relative speed, and the estimated collision time. Is compared with a preset threshold value, and it is determined that the collision cannot be avoided when the estimated collision time is lower than the threshold value. The ECU 16 detects a collision of a pedestrian on the front panel 3 by detecting a state in which the collision cannot be avoided from image information and the like of the front millimeter wave radar 14 and the front photographing camera 15. That is, the ECU 16, the front millimeter wave radar 14, and the front photographing camera 15 function as a collision detection unit that detects a pedestrian collision with the front panel 3.

  When the ECU 16 determines that the collision cannot be avoided, the ECU 16 activates the inflator 34 and starts energization of the motor 13 from the battery power source. The timing at which the inflator 34 is activated and the timing at which energization to the motor 13 is started are such that the expected collision time is such that the tilting arm 11 reaches the operating position with a slight delay after the pedestrian collides with the front panel 3. And the time required for the motor 13 to move the tilt arm 11 from the retracted position to the operating position.

  The timing for operating the inflator 34 and the timing for starting energization of the motor 13 may not be the timing when the tilting arm 11 reaches the operating position slightly after the pedestrian collides with the front panel 3. The timing at which the tilting arm 11 reaches the operating position may be the same as when the pedestrian collides with the front panel 3 or immediately before the pedestrian collides with the front panel 3. Further, when the relative speed with respect to the pedestrian and the vehicle speed are lower than a predetermined speed set in advance, the operation of the inflator 34 and the energization of the motor 13 may not be started. That is, the collision object protection apparatus 10 may not be operated. Further, the performance of the motor 13 and the characteristics of the worm gear 41 include performance (rotational force) capable of moving the tilt arm 11 from the retracted position to the operating position as long as there is at least a time corresponding to the threshold value of the expected collision time. The characteristics are set by experiment, simulation, or the like. When the performance of the motor 13 and the characteristics of the worm gear 41 are relatively high and the time for the motor 13 to move the tilt arm 11 from the storage position to the operating position is shorter than the expected collision time, the ECU 16 cannot avoid the collision. After a predetermined time has elapsed, energization of the motor 13 may be started after a predetermined time has elapsed.

  Next, the movement of the collision body protection apparatus 10 when the track 1 and the pedestrian collide will be described.

  During normal traveling of the truck 1, the tilting arm 11 of the collision body protection device 10 is placed in the retracted position in the contracted state, and the pedestrian protection net 12 is stored in the storage case 43.

  When the ECU 16 determines that the collision with the pedestrian cannot be avoided while the truck 1 is traveling, the ECU 16 activates the inflator 34 and starts energizing the motor 13 from the battery power source. When the ECU 16 operates the inflator 34, the inflator 34 generates gas inside the cylinder 32, and the piston 33 slides in a direction protruding from the cylinder 32 against the urging force of the coil spring 35 with respect to the cylinder 32. . The slide arm 20 slides in the extending direction relative to the support arm 19 in conjunction with the sliding movement of the piston 33 with respect to the cylinder 32, and the tilt arm 11 shifts from the contracted state to the extended state. When energization of the motor 13 is started, the cylindrical worm 40 on the motor 13 side is driven and rotated by the motor 13, the worm wheel 25 on the arm base end 21 side is driven to rotate, and the power of the motor 13 is tilted by the arm. 11 is transmitted. In other words, the tilting arm 11 tilts from the retracted position to the front upper working position while shifting from the contracted state to the extended state. When the tilting arm 11 transitions from the contracted state to the extended state, the pedestrian protection net 12 is pulled out from the storage case 43 by the tilting arm 11 and the outer edge 45 of the pedestrian protection net 12 is connected to the front bumper. 5 to the vicinity of the road surface 9 (see FIG. 3). When the tilting arm 11 tilts from the storage position to the front upper operating position, the pedestrian protection net 12 is pulled forward from the storage case 43 by the tilting arm 11, and the outer edge 45 of the pedestrian protection net 12 is It moves from the vicinity of the road surface 9 to the front of the front panel 3 at the front upper side. The tilting arm 11 reaches the operating position (see FIG. 6) slightly after the pedestrian collides with the front panel 3. When the tilting arm 11 reaches the operating position, the pedestrian protection net 12 is pulled forward from the storage case 43 and deployed between the pedestrian and the road surface 9 above the road surface 9 to receive the pedestrian. .

  In the collision body protecting device 10 configured as described above, when the track 1 and the pedestrian collide, the tilting arm 11 moves from the retracted state to the extended upper operating position while shifting from the contracted state to the extended state. The outer edge 45 of the pedestrian protection net 12 moves to the vicinity of the road surface 9 and then tilts to the front upper operating position. For this reason, the pedestrian immediately after the collision is scooped up near the ankle by the outer edge 45 of the pedestrian protection net 12 moving in the vicinity of the road surface 9, and the pedestrian protection developed between the pedestrian and the road surface 9. It is received by the net 12. Therefore, the secondary collision to the road surface 9 of the pedestrian after a collision can be prevented.

  Further, since the leg of the pedestrian after the collision (in the present embodiment, in the vicinity of the ankle) is scooped up, the pedestrian protection net 12 can be reliably deployed between the pedestrian and the road surface 9, and the collision object protection device 10 It is possible to prevent the pedestrian from being caught below the vehicle body or dragging the pedestrian after the operation of.

  Further, since the vicinity of the ankle, which is a relatively low position, of the pedestrian's leg after the collision is scooped up, the outer edge 45 of the pedestrian protection net 12 is relatively close to the pedestrian's leg when the tilting arm 11 is tilted. Since it is possible to reliably prevent the pedestrian from jumping forward by coming into contact with a high position, a secondary collision of the pedestrian on the road surface 9 can be reliably prevented.

  Further, the tilting arm 11 in the storage position has the front surface of the tilting arm 11 arranged at substantially the same position in the front-rear direction as the front surface of the front panel 3 and the like, and the tilting arm 11 does not protrude forward from the front panel 3 or the like. Further, it is possible to suppress a decrease in appearance in appearance due to the tilting arm 11 in the storage position protruding forward from the front panel 3 or the like.

  In the present embodiment, the telescopic tilting arm 11 is formed by the support arm 19 and the slide arm 20, but the tilting arm 11 is not limited to this, and the tilting arm is not composed of one member. It may be. In this case, the tip of the tilt arm is disposed in the vicinity of the lower portion of the front bumper 5 at the storage position, and when the tilt arm tilts, the outer edge 45 of the pedestrian protection net 12 Of these, scoop up below the front bumper 5.

  In the present embodiment, the slide arm 20 on the arm distal end portion 28 side is inserted into the support arm 19 on the arm proximal end portion 21 side, but the support arm 19 on the arm proximal end portion 21 side is inserted into the arm distal end portion 28 side. It may be inserted into the slide arm 20. Further, the support arm 19 and the slide arm 20 do not have to be formed in a rectangular cylinder, and may be, for example, a cylinder. Alternatively, without forming a cylindrical shape, for example, a slide rail is provided on one arm of the support arm or the slide arm, and a slide portion that is slidably supported by the slide rail is provided on the other arm. The support arm and the slide arm may be slidably movable via the sliding portion.

  In this embodiment, the actuator 27 is provided inside the support arm 19, the coil spring 35 of the actuator 27 holds the tilting arm 11 in the retracted position in the contracted state, and the inflator 34 extends the tilting arm 11 from the contracted state. However, the method of holding the tilting arm 11 in the retracted position in the contracted state and the method of shifting the tilting arm 11 from the contracted state to the extended state are not limited to this. For example, a coil spring (arm extending means) that biases the tilting arm 11 in the extending direction is provided between the support arm 19 and the slide arm 20, and the support arm 19 and the slide arm 20 are contracted in a state in which the coil spring is contracted. When the tilting arm 11 is changed from the contracted state to the extended state, the ECU 16 controls the stopper to support the support arm 19 and the slide arm by the stopper. The restriction on slide movement with 20 may be released. Alternatively, an inflator (arm extending means) for moving the tilting arm 11 from the contracted state to the extended state and an electronically controlled stopper (arm extending means) for holding the tilting arm 11 in the contracted state are provided. When shifting from the contracted state to the extended state, the ECU 16 may control both the inflator and the stopper.

  In the present embodiment, the worm gear 41 is provided between the motor 13 and the tilt arm 11, and the rotational force of the motor 13 is transmitted to the tilt arm 11 via the worm gear 41. However, the present invention is not limited to this. Alternatively, the motor 13 and the tilt arm 11 may be provided with pulleys, and both pulleys may be connected by a belt, a chain, or the like to transmit the rotational force of the motor 13 to the tilt arm 11.

  Moreover, in this embodiment, although the motor 13 was functioned as a tilting means, a tilting means is not limited to this. For example, an actuator driven by gas generated by the inflator may be disposed between the inner panel 22 behind the front panel 3 and the tilting arm 11 and fixed to each of them to function as tilting means. In this case, when the actuator is contracted, the tilting arm 11 is disposed at the storage position, and when the inflator is operated under the control of the ECU 16, the actuator extends and the tilting arm 11 moves to the operating position.

  In the present embodiment, the tilt arm 11 tilts from the retracted position to the front upper operating position while shifting from the contracted state to the extended state. However, the present invention is not limited to this. After completely shifting to the position, it may be tilted from the storage position to the front upper operation position.

  Further, in the present embodiment, the ECU 16 indirectly detects a state in which a collision cannot be avoided from image information of the front millimeter wave radar 14 and the front photographing camera 15, so that the pedestrian who indirectly approaches the front panel 3 thereafter. Although a collision is detected, a pedestrian collision with the front panel 3 may be directly detected. For example, instead of the front millimeter wave radar 14 and the front photographing camera 15, an acceleration sensor (collision detection means) that detects the acceleration in the front-rear direction of the front panel 3 and sequentially outputs it to the ECU 16 may be provided on the front panel 3. . In this case, the ECU 16 sequentially determines whether or not the acceleration input from the acceleration sensor has suddenly decreased, and when the acceleration has rapidly decreased, a pedestrian collides with the front panel 3 of the running track 1. It is determined that the pedestrian has collided with the front panel 3.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. 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.

1: Truck (vehicle)
2: Cab (car body)
3: Front panel (impacted surface)
3a: Front surface of front panel 9: Road surface 10: Colliding body protection device 11: Pair of left and right tilt arms 12: Pedestrian protection net (receiving member)
13: A pair of left and right motors (tilting means)
14: Forward millimeter wave radar (collision detection means)
15: Front shooting camera (collision detection means)
16: Control unit (collision detection means, control means)
17: A pair of left and right arm storage grooves 19: Support arm 20: Slide arm 21: Arm base end (base end of tilting arm)
27: A pair of left and right actuators (arm extension means)
28: Arm tip (tip of tilt arm)
44: Inner edge of the pedestrian protection net (the vehicle side edge of the pedestrian protection net)
45: Outer edge of pedestrian protection net (arm side edge of pedestrian protection net)

Claims (3)

A collision body protection device provided in a vehicle to protect a collision body that has collided with a collision target surface portion of a front portion of a vehicle body,
A base end portion disposed on both sides in the vehicle width direction of the impacted surface portion and having a base end portion rotatably supported with respect to the vehicle body around a rotation axis extending in the vehicle width direction, and extending downward from the base end portion; A storage position in which a front end portion is disposed below the vehicle body, and an operating position in which the front end portion is disposed forward of the collision target surface portion by rotating from the storage position forward and upward about the rotation axis. A pair of left and right tilt arms that can tilt between;
A vehicle body side edge that extends in the vehicle width direction below the vehicle body and is fixed to the vehicle body and the tip portions of the left and right tilt arms extend in the vehicle width direction and is supported by the tip portion. And the left and right tilt arms are stored in the lower part of the vehicle body so that the left and right tilt arms can be pulled out forward when the left and right tilt arms are disposed at the storage position, and the left and right tilt arms reach the operating position. In this state, a sheet-like receiving member that is pulled forward from the lower side of the vehicle body and deployed above the road surface,
A collision detecting means for detecting a collision of a colliding body with the collided surface portion of the vehicle body;
Tilting means for tilting the left and right tilting arms;
Control means for controlling the tilting means to tilt the left and right tilting arms from the stowed position to the operating position when the collision detecting means detects a collision of a colliding body with the collision target surface portion; Prepared,
The receiving member is deployed between a collision object that has collided with the collision target surface and a road surface when the left and right tilt arms reach the operating position, and receives the collision object. Protective device. The vehicle collision object protection device according to claim 1,
Arm extension means,
The left and right tilt arms include a support arm on the base end side and a slide arm on the tip end side that is slidably supported by the support arm,
The arm extension means is a contracted state in which the slide arm is slid in the contraction direction with respect to the support arm, and an extended state in which the slide arm is slid in the extension direction with respect to the support arm from the contracted state. The left and right tilt arms can be set to
The left and right tilt arms are held in the contracted state by the arm extension means in the storage position,
The control means controls the arm extension means so as to shift the left and right tilt arms from the contracted state to the extended state when the collision detecting means detects a collision of a colliding body with the collision target surface portion. A collision object protection device for a vehicle. The collision object protection device for a vehicle according to claim 1 or 2,
A pair of left and right arm storage grooves disposed on both sides of the collision surface portion of the vehicle body in the vehicle width direction and extending in the vertical direction while being recessed rearward from the front surface of the vehicle body;
The base end portions of the left and right tilt arms are disposed inside the left and right arm storage grooves,
The left and right tilt arms at the storage position extend downward from the base end inside the left and right arm storage grooves.

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