JP4664806B2 - Operation pedal support structure - Google Patents

Description

  The present invention relates to a support structure for an operation pedal that is pivotally supported by a dash panel and is operated to swing in the front-rear direction of a vehicle.

  Conventionally, as shown in Patent Document 1 below, a support for an operation pedal having a pedal bracket attached to a dash panel and a pedal body that is swingably supported via a support shaft supported by the pedal bracket In the structure, there is provided a rotation lever that drives the support shaft by rotating and contacting the vehicle body side member at the time of a vehicle collision, and the support shaft is arranged in the rear of the vehicle along a guide groove formed in the pedal bracket. The upper part of the pedal body is displaced toward the rear side of the vehicle with the installation part of the push rod that drives the brake booster as a fulcrum, and the pedal depression provided on the lower end part of the pedal body corresponding to this The part is displaced to the front side of the vehicle.

  Further, in Patent Document 2 below, when a vehicle collides, a rotating shaft that is a swing fulcrum of the pedal body is displaced relative to the pedal stepping portion provided at the lower end portion of the pedal body toward the rear side of the vehicle. The vehicle pedal support structure is configured to include an initial position holding mechanism that holds the rotating shaft at an initial position, and an urging unit that urges the rotating shaft toward the rear side of the vehicle. The position holding mechanism is provided with a rotating link that holds the rotating shaft and a fixed shaft that rotatably supports the rotating link at a position separated from the rotating shaft, and the rotating shaft is maintained at the initial position by the biasing means. By energizing the rotating link so as to cause the rotating shaft to be displaced from the initial position to the rear side of the vehicle in the event of a vehicle collision, the pedal depression unit is moved forward of the vehicle. Move to the side Configuration so as to have been disclosed.

Furthermore, as shown in the following Patent Document 3, the pedal bracket that supports the pedal body of the operation pedal so as to be swingable is expanded and deformed in accordance with an impact load that acts when the vehicle collides, and correspondingly, By disengaging the support shaft, which is the pivot point of the pedal body, from the pedal bracket, the pedal stepping part provided at the lower end of the pedal body moves to the rear side of the vehicle even when the dash panel is retracted in the event of a vehicle collision To prevent it from happening.
International Publication No. 03/45750 Pamphlet Japanese Patent No. 3269372 European Patent Application No. 0659615

  In the operation pedal support structure disclosed in Patent Documents 1 and 2, when the vehicle collides, the rotating shaft serving as the swing fulcrum provided at the upper end portion of the pedal body is moved to the rear side of the vehicle. Correspondingly, since the pedal stepping portion provided at the lower end of the pedal body is configured to move to the front side of the vehicle, the load input to the feet of the driver placed on the pedal stepping portion, that is, the vehicle It is possible to reduce the load acting on the foot according to the inertial force that tries to move the driver forward in the event of a collision.

  However, in the support structure of the operation pedal disclosed in Patent Document 1, the support shaft of the pedal body is supported by the arm portion provided in the rotating lever at the normal time and locked to the upper end portion of the guide groove. Therefore, rattling of the rotation lever corresponding to the external force acting on the pedal body causes the support state of the pedal body to become unstable and impair the operation feeling. When a large external force is applied, there is a problem that the locked state by the arm portion is released and the pedal body may drop from the locking portion.

  Further, as disclosed in the above-mentioned Patent Document 2, when it is configured to hold the rotating shaft of the pedal body in the upper initial position according to the urging force of the urging means at normal time, the urging means If the urging force is not set extremely strong, the rotating shaft cannot be stably held, and the support position of the rotating shaft is likely to fluctuate according to the expansion and contraction of the urging means. There is a problem that it is difficult to maintain the operational feeling in a good state.

  As disclosed in Patent Document 3, the pedal bracket is expanded and deformed in response to an impact load that acts during a vehicle collision, so that the support shaft serving as the pivot point of the pedal body is removed from the pedal bracket. When configured to be detached, the support shaft is stably supported by the pedal bracket as long as the pedal bracket is not expanded and deformed at normal times, so that the operational feeling of the pedal body can be maintained in a good state. is there. However, in the above configuration, when the pedal body is expanded and deformed in response to an impact load that is applied at the time of a vehicle collision, a load in an oblique direction acts on the pedal body supported by the pedal bracket. In the inclined state, it is easy for the pedal body to be caught by the pedal bracket. When such a situation occurs, the restraint state of the pedal body by the pedal bracket is maintained and a predetermined load acts on the driver's feet. Is inevitable.

  The present invention has been made in view of the above-mentioned problems, and can maintain the feeling of operation of the pedal body in a normal state during normal times, and can easily and effectively prevent the pedal stepping portion from retreating in the event of a vehicle collision. An object of the present invention is to provide a support structure for an operation pedal that can reduce a load acting on a driver's foot.

  In order to solve the above-described problems, the present invention provides a support structure for an operation pedal that is pivotally supported by a dash panel and is operated to swing in the front-rear direction of the vehicle. A pedal bracket that extends to the side, a pedal body that is swingably supported via a first support shaft that is installed in the pedal bracket and extends in the vehicle width direction, and a first that extends in the vehicle width direction that is installed in the pedal bracket. The two support shafts are supported so as to be swingable, and when the vehicle collides with the vehicle body side member, the second support shaft is pivotally displaced about the second support shaft to push the first support shaft downward. The pedal bracket includes a support portion that supports the first support shaft at a normal time, and the first support shaft is moved downward according to the rotation displacement of the rotation lever at the time of a vehicle collision. To drop off The supporting portion is provided with an angle of approximately 90 degrees at least downward from the line of action of the force applied from the first support shaft to the pedal bracket in response to a normal pedal depression operation. It is installed so that it may contact | abut with the said 1st spindle over the range (Claim 1).

  According to the present invention, in a normal running state, the pedal body is supported by the pedal bracket attached to the dash panel via the first support shaft extending in the vehicle width direction, so that the pedal body can be stabilized with a simple configuration. The support state can be obtained, and the operational feeling when the pedal body is swung can be maintained in a good state. In particular, in the present invention, the support portion of the pedal bracket that supports the first support shaft is substantially at least downward from the line of action of the force applied from the first support shaft to the pedal bracket in response to the driver's pedal depression operation. By being installed so as to abut on the first support shaft over an angle range of 90 degrees, a sufficient reaction force against the pedal depression force can be applied to the pedal body via the first support shaft. In addition, since the weight of the pedal body can be effectively supported, there is an advantage that the pedal body can be sufficiently supported and the operational feeling of the pedal body can be reliably maintained in a good state.

  When the vehicle collides, the first support shaft is pushed downward by rotating the displacement lever supported by the pedal bracket via the second support shaft according to the interference with the vehicle body side member. Therefore, even if a collision accident occurs when the driver's feet are placed on the pedal depression provided on the lower end of the pedal body, the pedal depression There is an advantage that it is possible to effectively prevent an excessive load from acting on the feet of the driver due to the portion being pushed to the rear side of the vehicle together with the pedal body.

  In the above configuration, it is preferable that both ends of the first support shaft are provided with fixing portions that contact the support portion in the vehicle width direction and hold the first support shaft on the pedal bracket. .

  In this way, the first support shaft can be stably held by the pedal bracket during normal operation. In addition, when the vehicle collides, the first support shaft can be dropped downward while sliding the fixing portions provided at both ends of the first support shaft along the outer surface of the support portion. It is possible to effectively prevent the occurrence of a situation in which the first support shaft is caught by the pedal bracket due to the fact that the one support shaft moves greatly in the vehicle width direction or is inclined. One spindle can be reliably dropped downward.

  It is preferable that the drop-off promoting portion is provided along the turning direction of the first support shaft that is pushed by the turning lever when the vehicle collides.

  Thus, if the drop-off promoting portion is provided along the turning direction of the first support shaft pushed by the turning lever, the first support shaft can be easily moved along the drop-off promoting portion at the time of a vehicle collision. Can be dropped.

  The drop-off promoting part can be constituted by a groove part, for example (claim 4).

  In this way, the first support shaft can be reliably dropped with a simple configuration.

  In this case, it is preferable that the rotating lever is configured to push the first support shaft toward a diagonally lower side on the front side of the vehicle when the vehicle collides.

  Thus, if the direction in which the turning lever pushes the first support shaft is set obliquely downward on the front side of the vehicle, the installation position of the groove portion (drop-off promoting portion) is adjusted accordingly. The groove portion can be set on the front side of the vehicle with respect to the support portion for supporting the shaft, that is, on the side opposite to the direction in which the force applied to the pedal bracket from the first support shaft according to the driver's pedal depression operation. A situation in which the support strength of the support portion is reduced due to the presence of the (drop-off promoting portion) can be effectively suppressed. Sometimes the first spindle can be properly dropped from the support.

  Further, in the present invention, the moving means for driving the first lever and the upper part of the pedal body, which are dropped from the support portion provided on the pedal bracket, to move to the rear side of the vehicle. It is preferable to provide (Claim 6).

  In this way, when the upper part of the pedal body is moved to the rear side of the vehicle at the time of a vehicle collision, the pedal depression part provided at the lower end part of the pedal body is connected to the push rod connecting part for driving the brake booster. Since the upper part of the pedal body can be moved to the front side of the vehicle with the fulcrum as a fulcrum, the load input to the driver's feet from the pedal stepping portion can be effectively reduced.

  The backward movement means is an extending portion provided on the rotating lever so as to extend further to the front side of the vehicle than an installation portion of the first support shaft, and the extending portion is It is preferable that the pedal body abuts on the upper part of the pedal body as the pivot lever is displaced, and is moved to the rear side of the vehicle.

  In this way, after the first support shaft is dropped, the lever ratio of the rotating lever that drives the pedal body is changed, so that the connecting portion of the push rod for driving the brake booster is used as a fulcrum and the upper portion of the pedal body. Can be greatly moved to the rear side of the vehicle, and the pedal stepping portion can be greatly moved to the front side of the vehicle accordingly, so that the load input to the driver's feet from this pedal stepping portion can be reduced. It can be effectively reduced.

  Further, in the present invention, the connecting portion of the push rod that drives the brake booster at the normal time and becomes the swing fulcrum of the pedal body after the first support shaft is dropped is more than the installation portion of the first support shaft in the pedal body. In the case of being provided at the lower side, the rotating lever moves the first support shaft substantially parallel to a line connecting the connecting portion of the push rod and the installation portion of the first support shaft at the time of a vehicle collision. It is preferable to push down and drop off from the support part (claim 8).

  As described above, the direction in which the rotating lever pushes the first support shaft in the event of a vehicle collision is determined in accordance with the push rod connecting portion and the first support, which serve as the swing fulcrum of the pedal body after the first support shaft is removed. When set substantially parallel to the line connecting the shaft installation portion, when the first support shaft is dropped, the pedal body is rotationally displaced with the connecting portion of the push rod as a fulcrum, and the upper portion of the pedal body is the vehicle. Accordingly, it is possible to prevent the pedal stepping portion from moving temporarily to the rear side of the vehicle accordingly, and the driver is caused by the backward movement of the pedal stepping portion. It is possible to effectively avoid a situation in which the load input to the foot of the head increases.

  As described above, according to the operation pedal support structure of the present invention, the operational feeling of the pedal body can be maintained in a normal state during normal times, and the retraction of the pedal stepping portion can be easily and effectively prevented during a vehicle collision. Thus, the load acting on the driver's feet can be reduced.

  FIG. 1 shows a support structure for an operation pedal according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a dash panel that partitions an engine room and a vehicle compartment. The dash panel 1 includes a pedal bracket 3 that supports a pedal body 2 that constitutes an operation pedal such as a brake pedal so as to be swingable. The brake booster 4 is attached, and the pedal bracket 3 is pivotally supported by a pivot lever 5 that drives the swinging fulcrum of the pedal body 2 to drop downward when the vehicle collides.

  2 to 4, the pedal bracket 3 includes a mounting board 6 that is bolted to the dash panel 1 and a pair of left and right bracket bodies 7 that extend from the left and right ends of the mounting board 6 to the rear side of the vehicle. At the rear end of the bracket body 7, a mounting bracket 8 for a brake sensor (not shown) for detecting that the pedal body 2 has been operated is projected downward. Further, the bracket body 7 of the pedal bracket 3 includes a pair of left and right vertical plates 9 extending from the left and right sides of the mounting board 6 to the rear side of the vehicle, and a pair of left and right extending from the lower end to the outer side in the vehicle width direction. Horizontal plate 10, a pair of left and right outer plates 11 extending downward from the outer end of the horizontal plate 10, and a pair of left and right extending obliquely from the lower end of the outer plate 11 toward the inner side in the vehicle width direction. The inclined plate 12 is provided.

  The vertical plate 9 of the bracket body 7 has a support hole 14 through which the first support shaft 13 serving as a swing fulcrum of the pedal body 2 is inserted, and an inclined groove portion 15 extending obliquely forward from the lower side of the support hole 14. And are formed. Further, a notch 16 extending obliquely toward the support hole 14 is formed on the rear side of the inclined groove portion 15, and the swing lever 5 is swung on the rear side of the support hole 14. A support hole 18 through which the second support shaft 17 serving as a fulcrum is inserted is formed.

  Below the inclined groove 15 and the notch 16 provided in the vertical plate 9 of the bracket body 7, the lower side of the vertical plate 9, the center in the front-rear direction of the horizontal plate 10, and the upper side of the outer plate 11. A substantially rectangular opening 19 is formed by cutting a side part over a predetermined range, and a substantially trapezoidal weak part 20 is defined by the opening 19 and the inclined groove 15 and the notch 16. Has been. The fragile portion 20 normally supports the first support shaft 13 from below and restricts the downward movement thereof, and is deformed according to the rotational displacement of the rotational lever 5 as will be described later when the vehicle collides. By doing so, the first support shaft 13 is configured to be allowed to drop downward.

  And it is provided in the right-and-left both ends of the 1st spindle 13 with respect to the peripheral part of the support hole 14 formed in the vertical board 9 of the said pedal bracket 3, and the support part of the 1st spindle 13 which consists of the said weak part 20. FIG. The first support shaft 13 is attached to the pedal bracket 3 by pressing a fixed portion including the nut 22 and the bolt head 23 in the vehicle width direction. That is, the shaft portion of the first support shaft 13 is inserted into the insertion hole provided in the support hole 14 of the bracket body 7 and the boss portion 21 of the pedal body 2, and at the distal end portion of the first support shaft 13. By screwing the nut 22, the fixing portion (the nut 22 and the bolt head portion 23) of the first support shaft 13 is pressed against the peripheral portion of the support hole 14 in the vehicle width direction. A single support shaft 13 is attached to the pedal bracket 3, and the pedal body 2 is swingably supported with the first support shaft 13 as a fulcrum.

  As shown in FIG. 1, a pedal stepping portion 34 on which a driver's foot is placed is provided at the lower end portion of the pedal body 2. Further, a push rod 35 for driving the brake booster 4 is connected between the pedal depression part 34 and the first support shaft 13 in the pedal body 2.

  Here, when the driver performs an operation of depressing the pedal depressing portion 34 with respect to the pedal body 2 supported by the installation portion of the first support shaft 13 and the push rod 35 as described above, this pedal depressing operation is performed. Accordingly, a forward operating force is applied from the push rod 35 to the brake booster 4, and a backward pressing force is applied from the first support shaft 35 to the support portion of the pedal bracket 3. Among these, the pressing force applied to the pedal bracket 3 from the first support shaft 13 is indicated by an arrow F in FIG. As shown in FIG. 5, the support portion of the pedal bracket 3 that supports the first support shaft 13 (the peripheral portion of the support hole 14 and the fragile portion 20) is added to the pedal bracket 3 from the first support shaft 13. It is installed so as to be in contact with the first support shaft 13 over an angle range A of approximately 90 degrees at least downward from the line of action of the pressing force F (except for the installation portion of the inclined groove 15 in the illustrated example). And is installed so as to be in contact with the first support shaft 13 over substantially the entire circumference). Thereby, the support part of the pedal bracket 3 can support the first support shaft 13 efficiently.

  The rotating lever 5 includes a pair of left and right legs 26 each having an insertion hole 25 through which the second support shaft 17 is inserted, and a pair of left and right side walls provided at the upper end of the legs 26. 27 and a top plate 28 for connecting the upper end portions of the left and right side wall plates 27 to each other. The front portion of the top plate 28 extends obliquely downward toward the front side of the vehicle from the leg body 26. The part 28a is installed. Further, the side wall plate 27 is provided with a reinforcing portion 30 that is inserted into the notch portion 16 of the pedal bracket 3 at a normal time to reinforce the fragile portion 20 to suppress deformation of the fragile portion 20. 26 protrudes from the rear portion of the main body 26. Further, as shown in FIGS. 2 and 4, a notched portion 31 that is rearwardly narrowed in a plan view is formed in the center of the front end portion of the extending portion 28 a, and this notched portion 31 faces the pedal body 2. It is designed to be installed.

  Then, the shaft portion of the second support shaft 17 is inserted into the support hole 18 of the bracket body 7 and the insertion hole 25 of the rotation lever 5, and a nut is screwed to the tip portion of the second support shaft 17. By attaching the second support shaft 17 to the pedal bracket 3, the rotating lever 5 is supported so as to be swingable about the second support shaft 17 as a fulcrum. Further, the reinforcing portion 30 of the rotating lever 5 is inserted into the notch portion 16 of the pedal bracket 3, and the leg body 26 of the rotating lever 5 is placed at a predetermined distance from the first support shaft 13. It is installed in a state of facing diagonally upward on the rear side. Further, the forward extending portion 28a provided on the top plate 28 is installed so as to extend further to the front side of the vehicle than the installation portion of the first support shaft 13, so that They are arranged in a state of facing each other at a predetermined distance.

  As shown in FIG. 1, an instrument panel reinforcement 32 for supporting a steering column made of a pipe material is disposed at a predetermined distance on the rear side of the rotating lever 5. The reinforcement 32 is provided with a vehicle body side member 33 facing the rear end portion of the rotating lever 5 at a predetermined distance. Then, when the dash panel 1 and the pedal bracket 3 are retracted when the vehicle collides, and the rear end portion of the rotating lever 5 attached to the pedal bracket 3 comes into contact with the vehicle body side member 33, as shown in FIG. In addition, the reinforcing member 30 is moved from the notch 16 of the pedal bracket 3 by rotating and displacing the leg 26 of the rotating lever 5 so as to tilt toward the front side of the vehicle with the second support shaft 17 as a fulcrum. The leg 26 comes into contact with the boss portion 21 that holds the first support shaft 13 while being separated downward, and the first support shaft 13 is substantially the same as the installation direction of the inclined groove portion 15 as shown by the arrows in the drawing. It is pushed diagonally downward on the front side of the vehicle in the same direction.

  When the pedal bracket 3 is further retracted according to the collision load of the vehicle, as shown in FIG. 7, the weakened portion 20 provided in the pedal bracket 3 starts from the notch portion 16 provided on the rear side thereof. By the plastic deformation so as to be pushed down, the inclined groove portion 15 is expanded and deformed. As a result, the support state of the first support shaft 13 is released, and the first support shaft 13 slides downward along the drop-off promoting portion including the inclined groove portion 15 expanded as described above, and the pedal is moved. As shown in FIG. 8, the first support shaft 13 moves into the opening 19 located below the support hole 14 and the bolt head 23 and the A fixed portion of the first support shaft 13 formed of a nut 22 is introduced between the left and right outer plates 11 and 11 through an opening 19 formed in the pedal bracket 3, and the pedal body 2 is in response to the pedal according to this. It comes off from the bracket 3.

  Further, after the first support shaft 13 is dropped downward, as shown in FIG. 9, the front end portion of the extension portion 28 a (the front portion of the top plate 28) provided in the rotating lever 5 is the pedal body 2. By abutting against the upper front surface, the upper portion of the pedal body 2 is pushed rearward of the vehicle, and the pedal body 2 is rotationally displaced with the connecting portion of the push rod 35 that drives the brake booster 4 as a fulcrum. That is, at the time of a vehicle collision, the lower portion of the first support shaft 13 that has fallen downward from the support portion of the pedal bracket 3 abuts against the front surface of the pedal body 2 and pushes it, thereby the first support shaft. 13 and the rear moving means for driving the upper part of the pedal body 2 to move to the rear side of the vehicle is constituted by an extending portion 28 a provided on the rotating lever 5. In addition, since the notch part 31 of the back shrinkage as mentioned above is formed in the front end part of the extension part 28a, the pedal body 2 is not in contact with the extension part 28a. It will be drawn to the vehicle width direction center part side along a formation surface. The notch 31 guides the pedal body 2 toward the center in the vehicle width direction as described above, so that the pedal body 2 released from the restraint by the pedal bracket 3 largely moves laterally. Generation | occurrence | production of the situation which gets caught by a structural member is prevented effectively.

  As described above, according to the above configuration, in the normal traveling state, the support portion (the peripheral portion of the support hole 14 and the fragile portion 20) of the pedal bracket 3 attached to the dash panel 1 extends in the vehicle width direction. By supporting the pedal body 2 via the single support shaft 13, a stable support state of the pedal body 2 can be obtained with a simple configuration, and the operational feeling when swinging the pedal body 2 is in a good state. Can be maintained. In particular, in the above configuration, the support portion of the pedal bracket 3 that supports the first support shaft 13 is affected by the action line of the pressing force F applied from the first support shaft 13 to the pedal bracket 3 in response to the driver's pedal depression operation. Since it is installed at least on the lower side so as to contact the first support shaft 13 over an angle range A of approximately 90 degrees, a sufficient reaction force against the pedal depression force is provided via the first support shaft 13. The pedal body 2 can be applied to the pedal body 2 and can effectively support the weight of the pedal body 2, so that the support rigidity of the pedal body 2 is sufficiently secured and the operational feeling of the pedal body 2 is surely in a good state. There is an advantage that it can be maintained.

  When the vehicle collides, the first support shaft 13 is pushed downward by the rotating lever 5 that is rotated and displaced in accordance with the interference with the vehicle body side member 33, and the first support shaft 13 is supported from below. Since the first support shaft 13 is configured to be dropped downward by deforming the weakened portion 20 that is to be deformed, the load acting on the driver's feet placed on the pedal stepping portion 34 can be effectively reduced. There is an advantage. That is, in the above embodiment, when a frontal collision of the vehicle occurs and the dash panel 1 is pushed backward, the front end portion of the vehicle body side member 33 is brought into contact with the rear end portion of the turning lever 5. The rotary lever 5 is pivotally displaced with the second support shaft 17 as a fulcrum, thereby applying a pressing force for displacing the first support shaft 13 downward, and the weakened portion 20 is moved downward according to the pressing force. Since the drop-promoting portion including the inclined groove portion 15 provided in front of the fragile portion 20 is expanded and deformed, the first support by the pedal bracket 3 is generated when a collision accident occurs. While releasing the support state of the shaft 13, the first support shaft 13 whose support state has been released can be dropped off obliquely downward on the front side of the vehicle along the inclined groove portion 15. As a result, even when a collision accident occurs with the driver's foot placed on the pedal stepping portion 34, the pedal stepping portion 34 is pushed to the rear side of the vehicle body together with the pedal body 2. As a result, it is possible to effectively prevent an excessive load from acting on the driver's foot.

  In addition, in the above-described embodiment, when a vehicle collision accident occurs, first, the leg body 26 of the turning lever 5 is brought into contact with the boss portion 21 to push the boss portion 21 downward and hold it. After the first support shaft 13 is removed from the support portion of the pedal bracket 3 (see FIG. 7), the front end portion of the extension portion 28a of the rotating lever 5 is brought into contact with the lower portion of the first support shaft 13 of the pedal body 2. By doing so, the upper portion of the pedal body 2 is moved to the rear side of the vehicle (see FIG. 9), so that the first support shaft 13 can be easily dropped from the support portion of the pedal bracket 3 and thereafter The lever ratio of the turning lever 5 that drives the pedal body 2 can be changed to displace the upper part of the pedal body 2 largely to the rear side of the vehicle. As a result, the pedal stepping portion 34 is greatly increased to the front side of the vehicle. Move and luck There is an advantage that it is possible to reduce the load acting on the person's feet effectively.

  That is, when the leg 26 of the rotating lever 5 is brought into contact with the first support shaft 13 and the first support shaft 13 is dropped from the support hole 14 as described above, the driving force of the rotating lever 5 is applied. The upper end of the pedal body 2 can be easily dropped down with a large force by increasing the lever principle. After the first support shaft 13 is removed from the support hole 14, the upper portion of the pedal body 2 can be moved to the rear side of the vehicle without applying such a large driving force. By setting the contacted portion of the pedal body 2 that is pushed by the front end portion of the protruding portion 28a to a position close to the connecting portion of the push rod 35 that serves as the swing fulcrum of the pedal body 2, the pedal body 2 is moved. It is possible to move the pedal stepping portion 34 largely to the front side of the vehicle with a large swing displacement. Therefore, the inertia which tries to move the driver to the front side in response to the load inputted to the driver's feet from the pedal depression 34 provided at the lower end portion of the pedal body 2, that is, the front collision load of the vehicle. There is an advantage that the load acting on the feet of the driver can be effectively reduced by the force.

  Further, as in the above embodiment, the pair of left and right vertical plates 9 constituting the pedal bracket 3 are provided with support holes 14 for the first support shaft 13 and fixed at both left and right ends of the first support shaft 13. By pressing the parts (nut 22 and bolt head 23) against the support part (the peripheral part of the support hole 14 and the weak part 20) of the pedal bracket 3, the left and right ends of the first support shaft 13 are connected to the pedal bracket 3. The first support shaft 13 can be stably supported by the pedal bracket 3 during normal operation, and the first support shaft 13 detached from the support portion at the time of a vehicle collision can be By moving the first support shaft 13 downward along the vertical plate 9, the first support shaft 13 is moved in the vehicle width direction or in an oblique state. There is an advantage that the occurrence of a situation that could get caught in the Tsu door 3 can be effectively prevented.

  Further, as in the above-described embodiment, a drop-off promoting portion including the inclined groove portion 15 that promotes the drop-off of the first support shaft 13 is installed so as to extend obliquely forward from the lower side portion of the support hole 14, and The first support shaft 13 is pushed in the direction substantially the same as the installation direction of the inclined groove portion 15 (obliquely downward on the front side of the vehicle) in accordance with the rotational displacement of the moving lever 5 when the vehicle collides. When it is configured (see FIG. 6), the first support shaft 13 can be easily dropped below the support hole 14 along the inclined groove portion 15. In the above-described embodiment, the inclined groove portion 15 is installed so as to extend substantially linearly in a diagonally downward direction. However, the inclined groove portion 15 is centered on the second support shaft 17 that is the swing fulcrum of the rotating lever 5. The inclined groove portion 15 may be more faithfully aligned with the turning direction of the first support shaft 13 that is pushed by the turning lever 5 when the vehicle collides. In this way, the first support shaft 13 can be more smoothly dropped downward along the arcuate inclined groove portion 15.

  Furthermore, in the above-described embodiment, the inclined groove portion 15 is connected to the front side of the vehicle with respect to the support hole 14, that is, the direction of action of the pressing force F applied to the pedal bracket 3 from the first support shaft 13 (see FIG. 5). Due to the installation on the opposite side, the support strength of the support portion (the peripheral portion of the support hole 14 and the fragile portion 20) of the pedal bracket 3 that supports the first support shaft 13 is reduced due to the presence of the inclined groove portion 15. Therefore, the first support shaft 13 can be properly dropped from the support portion at the time of a vehicle collision while sufficiently securing the support strength of the support portion at the normal time. There is an advantage.

  The operation pedal support structure as described above is an embodiment of the operation pedal support structure according to the present invention, and the specific configuration and the like are appropriately changed without departing from the gist of the present invention. This is possible, and modifications will be described below.

  (1) In the above embodiment, as shown in FIG. 3, the first support shaft 13 is supported from below by the fragile portion 20 provided between the support hole 14 and the opening 19 below the support hole 14. At the time of a collision, the fragile portion 20 is plastically deformed, and the first support shaft 13 is dropped downward from the support hole 14 along the inclined groove portion 15 that is expanded in accordance with the plastic deformation of the fragile portion 20. However, as long as the support structure can obtain a stable support state of the first support shaft 13 in a normal state and can drop the first support shaft 13 in response to a vehicle collision, the support structure is not limited to the above structure. A structure can be adopted. For example, as shown in FIG. 10, a projecting portion 37 that protrudes toward the front side of the vehicle is provided at the upper end portion of the opening portion 19 formed in the lower portion of the support hole 14 where the first support shaft 13 is supported. The protrusion 37 restricts the downward movement of the first support shaft 13 in a normal state, and deforms the protrusion 37 in accordance with the rotational displacement of the rotation lever 5 in the event of a vehicle collision. You may comprise so that the axis | shaft 13 may drop | omit below. According to this configuration, while simplifying the structure of the pedal bracket 3, the first support shaft 13 can be held in a stable support state in a normal traveling state, and the protrusion 37 can be used during a vehicle collision. The first support shaft 13 can be easily detached from the installation portion by deforming the shaft.

  (2) In the above embodiment, when the first support shaft 13 is dropped from the support hole 14, the first support shaft 13 is moved into the opening 19 along the inclined groove portion 15 to fix the first support shaft 13. The first support shaft 13 is configured to be completely detached from the pedal bracket 3 by introducing the portions (the nut 22 and the bolt head portion 23) into the left and right outer plates 11, 11, but the first support shaft As long as the support structure can properly release the 13 constraints in accordance with the collision of the vehicle, not only the above structure but also various structures can be adopted. For example, as shown in FIG. 11, a structure may be provided in which a drop-off promoting portion is formed that includes a guide groove 39 that once extends from the lower side of the support hole 14 to the front side of the vehicle and extends greatly to the rear of the vehicle on the opposite side. Then, at the initial stage of the collision of the vehicle, as shown in FIG. 12, the rear end portion of the turning lever 5 is brought into contact with the vehicle body side member formed of the instrument panel reinforcement 32, and the turning lever 5 is turned. Then, by pushing the first support shaft 13 diagonally downward on the front side of the vehicle, the pair of front and rear projections 37 provided at the upper end of the guide groove 39 is deformed, and the first support shaft 13 is moved. As shown in FIG. 13, the vehicle is once dropped obliquely downward on the front side of the vehicle, and the upper portion of the pedal body 2 is pushed rearward by the front end portion of the extending portion 28 a of the rotating lever 5. The first support shaft 13 may be guided along the guide groove 39 to the rear side of the vehicle. When configured in this way, the support rigidity of the pedal body 2 in a normal state can be sufficiently ensured, and the upper end of the pedal body 2 is not completely detached from the pedal bracket 3 in the event of a vehicle collision. By moving the pedal stepping portion 34 provided at the lower end portion of the pedal body 2 to the rear side so as to move largely to the front side of the vehicle, the load input from the pedal stepping portion 34 to the driver's feet is effective. There is an advantage that it can be reduced.

  (3) In the above embodiment, when the vehicle collides, the first support shaft 13 is pushed obliquely downward on the front side of the vehicle according to the rotational displacement of the rotational lever 5. The support shaft 13 may be configured to be pushed substantially vertically downward. In such a case, it is necessary to deform the fragile portion 20 more greatly when the first support shaft 13 is dropped, but the connecting portion of the push rod 35 and the installation portion of the first support shaft 13 are connected. Since the pedal body 2 can be dropped substantially parallel to the line, when the first support shaft 13 is dropped, the pedal body 2 is rotationally displaced with the connecting portion of the push rod 35 as a fulcrum, and the upper portion of the pedal body 2 is removed. Can be prevented from moving to the front side of the vehicle, and the pedal depression part 34 can be prevented from temporarily moving to the rear side of the vehicle accordingly. For this reason, it is possible to effectively avoid a situation in which the load input to the driver's feet due to the backward movement of the pedal depressing portion 34 increases.

It is a side view which shows embodiment of the support structure of the operation pedal which concerns on this invention. It is a disassembled perspective view which shows the specific structure of the support structure of the said operation pedal. It is a side view which shows the support state of the pedal main body in the normal time. It is a front view which shows the specific structure of the support structure of the said operation pedal. It is explanatory drawing which shows the specific structure of the support part which supports a 1st spindle. It is a side view which shows the support state of the pedal main body in the collision initial stage. It is a side view which shows the state which the 1st spindle fell off. It is a front view which shows the state which the 1st spindle fell off. It is a side view which shows the state of the pedal body in the latter stage of a collision. It is explanatory drawing which shows another specific example of the support part which supports a 1st spindle. It is a side view which shows another embodiment of the support structure of the operation pedal which concerns on this invention. It is a side view which shows the support state in the collision initial stage of the pedal main body concerning another said embodiment. It is a side view which shows the support state in the collision late stage of the pedal main body concerning another said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dash panel 2 Pedal body 3 Pedal bracket 4 Brake booster 5 Rotating lever 13 1st spindle 15 (Inclination) Groove part (drop-off promotion part)
17 Second spindle 22 Nut (fixed part)
23 Bolt head (fixed part)
28a Extension part (backward movement means)
33 Car body side member 35 Push rod F Pressing force (force applied to the pedal bracket from the first spindle)
A Angle range

Claims (8)

A support structure for an operation pedal that is pivotally supported by a dash panel and swings in the longitudinal direction of the vehicle,
A pedal bracket attached to the dash panel and extending to the rear side of the vehicle;
A pedal body that is swingably supported via a first support shaft that is installed in the pedal bracket and extends in the vehicle width direction;
The second support shaft is pivotally supported via a second support shaft installed in the pedal bracket and extending in the vehicle width direction, and is rotated about the second support shaft by interfering with a vehicle body side member at the time of a vehicle collision. A rotating lever that is displaced and pushes the first support shaft downward;
The pedal bracket includes a support portion that supports the first support shaft in a normal state, and a dropout that promotes the first support shaft to drop out in accordance with the rotational displacement of the rotation lever in the event of a vehicle collision. And the Promotion Department,
The support portion comes into contact with the first support shaft over an angle range of approximately 90 degrees at least downward from the line of action of the force applied from the first support shaft to the pedal bracket in response to a pedal depression operation in a normal time. The operation pedal support structure is characterized in that it is installed as follows. The operation pedal support structure according to claim 1,
A support structure for an operating pedal, wherein a fixing portion is provided at both ends of the first support shaft so as to contact the support portion in the vehicle width direction and hold the first support shaft on a pedal bracket. In the operation pedal support structure according to claim 1 or 2,
The operation pedal support structure, wherein the drop-off promoting portion is provided along a turning direction of the first support shaft that is pushed by a turning lever when a vehicle collides. In the operation pedal support structure according to claim 3,
A support structure for an operation pedal, wherein the drop-off promoting portion is constituted by a groove. In the operation pedal support structure according to claim 3 or 4,
The operation lever supporting structure according to claim 1, wherein the turning lever pushes the first support shaft in a diagonally downward direction on the front side of the vehicle when the vehicle collides. In the operation pedal support structure according to any one of claims 1 to 5,
The rotating lever is provided with a rear moving means for driving the first support shaft and the upper portion of the pedal body, which are dropped from the support portion provided on the pedal bracket, to move to the rear side of the vehicle. Support pedal support structure. The operation pedal support structure according to claim 6,
The backward moving means is an extending portion provided on the rotating lever so as to extend further to the front side of the vehicle than an installation portion of the first support shaft.
The extension part is in contact with the upper part of the pedal body in accordance with the turning displacement of the turning lever when the vehicle collides, and moves this to the rear side of the vehicle. In the operation pedal support structure according to claim 1 or 2,
The pedal body is provided with a connecting portion of a push rod that drives the brake booster at a normal time and becomes a swing fulcrum of the pedal body after the first support shaft is dropped below the installation portion of the first support shaft. And
The rotating lever pushes the first support shaft substantially parallel to a line connecting the connecting portion of the push rod and the installation portion of the first support shaft when the vehicle collides, and drops off the support portion. A support structure for an operating pedal.

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