JP5727842B2 - Instrument panel structure of vehicle - Google Patents

Description

  The present invention relates to an instrument panel structure for a vehicle.

  In general, as shown in FIG. 5, an instrument panel 3 is provided at the front of the cab of the cab 2 of the truck 1 as a vehicle.

  As shown in FIGS. 6 and 7, the instrument panel 3 is configured such that an instrument panel reinforcement 5 extending in the vehicle width direction is bolted to the side brackets 4 installed at both ends in the vehicle width direction of the front part of the cab. It is attached by tightening with the fastening member 6, and a constricted portion 5a formed at the end of the instrument panel reinforcement 5 on the driver's seat side, and an instrument panel component 7 disposed so as to cover the constricted portion 5a A recess 9 is formed to allow the knee 8a of the seated occupant 8 to move forward during a vehicle collision.

  When a collision accident of the truck 1 as the vehicle occurs, the knee 8a of the occupant 8 moves by L1 from the reference point O to the front of the vehicle as shown in FIG. 7, the contact point A is first touched, and the instrument panel component 7 is further moved forward so as to crush the instrument panel part 7, and the knee 8a of the occupant 8 moves from the reference point O to the front of the vehicle by L2. At the position of point B, the instrument panel component 7 comes into contact with the instrument panel reinforcement 5, and the knee 8a of the occupant 8 reaches the position of point C where the knee 8a of the occupant 8 moves forward from the reference point O by L3. .

  That is, when the instrument panel component 7 is deformed so as to bite into the recess 9 as the knee 8a of the occupant 8 moves forward of the vehicle, energy at the time of the vehicle collision is absorbed, and the knee of the occupant 8 is absorbed. 8a does not receive a big impact.

  Incidentally, when the knee 8a of the occupant 8 moves forward at the time of a vehicle collision, the load acting on the knee 8a is zero until the amount of knee movement from the reference point O becomes L1, as shown in FIG. However, after the knee 8a of the occupant 8 contacts the instrument panel part 7 at the contact point A, the load acting on the knee 8a gradually increases as the instrument panel part 7 is deformed, When the instrument panel component 7 to be crushed by 8a comes into contact with the instrument panel reinforcement 5, that is, when the knee 8a of the occupant 8 moves from the reference point O to the front of the vehicle by L2 and reaches the position of point B. The load acting on the knee 8a rapidly increases and reaches F [N] at the maximum, and after reaching the position of the point C where the knee 8a of the occupant 8 moves from the reference point O by L3 forward of the vehicle, 8a Load acting is zero again.

  For example, Patent Document 1 shows a general technical level related to the vehicle instrument panel structure as described above.

Japanese Utility Model Publication No. 6-42453

  However, as described above, it is possible to sufficiently absorb the energy at the time of the vehicle collision only by deforming the instrument panel component 7 so as to bite into the recess 9 as the knee 8a of the occupant 8 moves forward of the vehicle. And it is unavoidable that the knee 8a of the occupant 8 collides with the instrument panel reinforcement 5 which is a rigid body only through the instrument panel component 7, and the load acting on the knee 8a of the occupant 8 is reduced. There were cases where it was difficult.

  In view of such circumstances, the present invention is intended to provide an instrument panel structure for a vehicle that can absorb energy at the time of a vehicle collision sufficiently efficiently and can reduce a load acting on an occupant's knee. is there.

The present invention attaches an instrument panel reinforcement extending in the vehicle width direction to the side brackets installed at both ends in the vehicle width direction of the front part of the driver's cab, and forms at least the driver seat side end of the instrument panel reinforcement. An instrument panel structure for a vehicle in which a recessed portion that allows forward movement at the time of a vehicle collision of a seated occupant's knee is formed by the narrowed portion and an instrument panel component disposed so as to cover the narrowed portion In
An energy absorbing member that absorbs energy by being deformed with the forward movement of the occupant's knee during a vehicle collision is disposed in the recess ,
In the recess, a knee bracket that absorbs energy by being deformed with forward movement of the occupant's knee at the time of a vehicle collision is attached so as to be juxtaposed with the energy absorbing member,
The knee bracket includes a flange portion that linearly extends from a base end side attached to the instrument panel reinforcement and has a distal end curved, and a web portion that is orthogonal to the flange portion.
The web portion is provided with notches at a plurality of required locations,
The present invention relates to an instrument panel structure for a vehicle, wherein the knee bracket is arranged so as to be shifted from the center line passing through the reference point of the occupant's knee toward the center in the vehicle width direction .

  According to the above means, the following operation can be obtained.

Unlike the conventional case in which the instrument panel component is simply deformed into the recess as the passenger's knee moves forward of the vehicle, the energy absorbing member and the knee bracket disposed in the recess are By absorbing the occupant's knee as it moves forward in the event of a vehicle collision, it absorbs the energy at the time of the vehicle collision , not the instantaneous energy absorption, but the sufficient absorption. Therefore, it is possible to prevent the occupant's knee from colliding with the instrument panel reinforcement, which is a rigid body, only through the instrument panel parts, and the load acting on the occupant's knee can be reduced.

  In the instrument panel structure of the vehicle, an energy absorbing member that is gripped by an instrument panel mounting machine when the instrument panel reinforcement is assembled to a side bracket of the instrument panel and is deformed when the vehicle collides is formed in the instrument panel. An instrument panel mounting bracket that can be supported together with the reinforce constriction can be provided, and in this way, the instrument panel mounting that is gripped by the instrument panel mounting machine when assembled to the side bracket of the instrument panel reinforcement. When the vehicle collides, the energy absorbing member can be stably deformed while being supported together with the constricted portion of the instrument panel reinforcement. Since the ability becomes effective for efficiently absorbing energy during a vehicle collision.

  Further, in the instrument panel structure of the vehicle, the energy absorbing member can be constituted by a drink holder, and in this way, the drink holder has a circular cross-sectional shape, and when the drink holder is deformed, It becomes easy to make the cross-sectional shape collapse, and it becomes possible to absorb energy at the time of a vehicle collision more efficiently.

According to the vehicle instrument panel structure of the present invention, the energy at the time of the vehicle collision can be absorbed sufficiently efficiently by performing continuous energy absorption instead of instantaneous energy absorption . The outstanding effect that the load which acts on a knee can be reduced can be show | played.

BRIEF DESCRIPTION OF THE DRAWINGS It is a plane sectional view which shows the Example of the instrument panel structure of the vehicle of this invention, Comprising: (a) is a figure which shows the normal state with which the instrument panel components are not deform | transforming, (b) is the seated passenger | crew's knee It is a figure which shows the state which moved forward at the time of a vehicle collision, contacts an instrument panel component, and this instrument panel component deform | transformed. It is a perspective view which shows the bracket for instrument panel mounting, and the knee bracket attached to the instrument panel reinforcement in the Example of the instrument panel structure of the vehicle of this invention. It is a front view which shows the state by which the bracket for instrument panel mounting in the Example of the instrument panel structure of the vehicle of this invention was hold | gripped by the instrument panel mounting machine. In the Example of the instrument panel structure of the vehicle of this invention, it is a diagram which shows the relationship between the knee movement amount when the knee of the seated passenger | crew moves ahead at the time of a vehicle collision, and the load which acts on a knee. It is a perspective view which shows the instrument panel with which the driver's cab front part was equipped in the cab of the truck as a vehicle. It is a plane sectional view showing an example of the conventional instrument panel structure of a vehicle. It is a perspective view which shows the instrument panel reinforcement in an example of the instrument panel structure of the conventional vehicle. In an example of the instrument panel structure of the conventional vehicle, it is a diagram which shows the relationship between the knee movement amount and the load which acts on a knee when the seated passenger | crew's knee moves ahead at the time of a vehicle collision.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 4 show an embodiment of a vehicle instrument panel structure according to the present invention. In the figure, the same reference numerals as those shown in FIGS. 5 to FIG. 8 is the same as the conventional one shown in FIGS. 5 to 8, but the feature of the present embodiment is that, as shown in FIGS. The point is that an energy absorbing member 10 that absorbs energy by being deformed along with the forward movement of the is disposed.

  In the case of the present embodiment, the energy absorbing member 10 is constituted by a cylindrical drink holder 10a that is recessed in the instrument panel component 7 and has a bottom surface.

  Also, in the recess 9, an energy absorbing member 10 that is gripped by an instrument panel mounting machine 11 (see FIG. 3) when the instrument panel reinforcement 5 is attached to the side bracket 4 and is deformed at the time of a vehicle collision is provided. An instrument panel mounting bracket 12 that can be supported together with the constricted portion 5a of the instrument panel reinforcement 5 is provided.

  As shown in FIGS. 1 and 2, the instrument panel mounting bracket 12 is an L-shaped bracket fixed to the end of the instrument panel reinforcement 5, and has a gripping hole 12a (see FIG. 2) on its end surface. ) Are drilled vertically (two in the example of FIG. 2), and the instrument panel 3 is formed as one unit by attaching various parts to the instrument panel reinforcement 5 at the vehicle assembly factory. As shown in the drawing, when the instrument panel mounting machine 11 is gripped from both sides, a plurality of (two in the example of FIG. 3) support pins 11a projecting from the instrument panel mounting machine 11 are used for mounting the instrument panel. The bracket 12 is inserted into the holding hole 12a. In the example shown in FIG. 3, the instrument panel mounting bracket 12 provided at the end on the passenger seat side (left side in FIG. 3) protrudes from the end of the instrument panel reinforcement 5, and the instrument panel One support pin 11a protruding from the instrument panel mounting machine 11 is fitted into one gripping hole 12a drilled in the mounting bracket 12.

  Furthermore, as shown in FIGS. 1 and 2, a knee bracket 13 is attached to the instrument panel reinforcement 5 so as to be juxtaposed with a drink holder 10 a as the energy absorbing member 10. The knee bracket 13 includes a flange portion 13a linearly extending from a proximal end side attached to the instrument panel reinforcement 5 and having a distal end curved, and a web portion 13b orthogonal to the flange portion 13a. The web portion 13b is easily buckled by providing cutout portions 13c at a plurality of required locations (two locations in the example of FIG. 1), while the knee bracket 13 is disposed at a position where the knee bracket 13 is disposed. The knee bracket 13 is deformed with the movement of the knee 8a of the occupant 8 forward of the vehicle by shifting the distance from the center line passing through the reference point O to the center in the vehicle width direction (left side in FIG. 1) by a distance W. In this case, not the instantaneous energy absorption but the continuous energy absorption can be performed.

  Next, the operation of the above embodiment will be described.

  When a collision accident of the truck 1 as a vehicle occurs, the knee 8a of the occupant 8 moves from the reference point O to the front of the vehicle by L1 due to inertia, as shown in FIG. On the other hand, first, the contact point A is touched and the instrument panel part 7 is further moved forward so as to crush the instrument panel part 7.

  Subsequently, when the knee 8a of the occupant 8 moves from the reference point O to the front of the vehicle by L4 as shown in FIG. 1B and reaches the point D, the instrument panel component 7 becomes the energy absorbing member 10. The drink holder 10a and the knee bracket 13 are in contact with each other. Further, the drink holder 10a is crushed, the knee bracket 13 is buckled, and the knee 8a of the occupant 8 reaches the position of a point E that moves from the reference point O to the front of the vehicle by L5 and stops. The web portion 13b of the knee bracket 13 is provided with cutout portions 13c at a plurality of required locations (two locations in the example of FIG. 1) to facilitate buckling. Since the distance between the center line passing through the reference point O of the knee 8a of the occupant 8 and the center side in the vehicle width direction (left side in FIG. 1) is shifted by the distance W, the occupant 8 moves along the knee 8a forward of the vehicle. Thus, when the knee bracket 13 is deformed, it is possible to perform continuous energy absorption instead of instantaneous energy absorption.

  In the process of being crushed, the drink holder 10a comes into contact with the instrument panel reinforcement 5 at a point X in the constricted portion 5a as shown in FIG. The instrument panel mounting bracket 12 comes into contact with the point Y and is deformed so as to be pushed toward the vehicle width end side by being pushed by the drink holder 10 a, and its tip is point Z with respect to the inner surface of the instrument panel component 7. It will come into contact with and stop. That is, the drink holder 10a is supported by the constricted portion 5a of the instrument panel reinforcement 5 at the point X and supported by the instrument panel mounting bracket 12 at the point Y, and the constricted portion 5a of the instrument panel reinforcement 5 It can be stably deformed while being held so as to be wrapped by the instrument panel mounting bracket 12.

  Incidentally, when the knee 8a of the occupant 8 moves forward in the event of a vehicle collision, the load acting on the knee 8a is zero until the amount of knee movement from the reference point O becomes L1, as shown in FIG. After the knee 8a of the occupant 8 comes into contact with the instrument panel part 7 at the contact point A, the load acting on the knee 8a gradually increases as the instrument panel part 7 is deformed. From the contact point D where the panel component 7 comes into contact with the drink holder 10a as the energy absorbing member 10 and the knee bracket 13, the rate of increase in the load acting on the knee 8a increases. The rate of increase in the load is shown in FIG. As in the conventional example, after the knee 8a of the occupant 8 moves from the reference point O to the front of the vehicle by L2, the rate of increase of the load until the point 8 reaches the position of point C (see FIG. 8) becomes gradual. The load acting on the knee 8a when the knee 8a reaches the position of the point E where the knee 8a moves from the reference point O by L5 forward of the vehicle is due to energy absorption due to deformation of the drink holder 10a as the energy absorbing member 10. The movement of the knee 8a of the occupant 8 to the front of the vehicle is stopped at the position of the point E, and thereafter, the load acting on the knee 8a becomes zero again.

  As a result, unlike the conventional case, the instrument panel component 7 is disposed in the recess 9 unlike the conventional case where the instrument panel component 7 is simply deformed into the recess 9 as the knee 8a of the occupant 8 moves forward of the vehicle. Since the drink holder 10a as the energy absorbing member 10 is deformed along with the forward movement of the knee 8a of the occupant 8 at the time of the vehicle collision, it becomes possible to sufficiently absorb the energy at the time of the vehicle collision. It is possible to avoid the 8 knee 8a from hitting the instrument panel reinforcement 5 which is a rigid body only through the instrument panel component 7 and to reduce the load acting on the knee 8a of the occupant 8.

  In addition, in the present embodiment, the energy absorbing member 10 that is gripped by the instrument panel mounting machine 11 when the instrument panel reinforcement 5 is assembled to the side bracket 4 and is deformed at the time of the vehicle collision is provided in the recess 9. Since the instrument panel mounting bracket 12 that can be supported together with the constricted portion 5a of the instrument panel reinforcement 5 is provided, it is gripped by the instrument panel mounting machine 11 when the instrument panel reinforcement 5 is assembled to the side bracket 4. The instrument panel mounting bracket 12 also serves as a support for the drink holder 10a as the energy absorbing member 10 at the point Y shown in FIG. While supporting at point X shown in FIG. 1 (b) of the constricted portion 5a of the force 5 it is possible to stably deformed, the effective to efficiently absorb the energy of a vehicle collision.

  In the present embodiment, the energy absorbing member 10 is constituted by the cylindrical drink holder 10a that is recessed in the instrument panel part 7 and has a bottom surface. Therefore, when the drink holder 10a is deformed. It becomes easy to make the shape of the cross-sectional shape constant, and it becomes possible to absorb energy at the time of a vehicle collision more efficiently.

  In this way, the energy at the time of the vehicle collision can be absorbed sufficiently efficiently, and the load acting on the knee 8a of the occupant 8 can be reduced.

  The vehicle instrument panel structure of the present invention is not limited to the above-described embodiment, and the energy absorbing member is not limited to the drink holder, but includes a tray having a recess, a hollow cylindrical part, a rib, It is also possible to use grid-like ribs, not only the end on the driver's seat side inside the instrument panel reinforcement, it can also be applied to the end on the passenger seat side, etc. Of course, various modifications can be made without departing from the scope of the present invention.

1 truck (vehicle)
DESCRIPTION OF SYMBOLS 3 Instrument panel 4 Side bracket 5 Instrument panel reinforcement 5a Constriction part 6 Fastening member 7 Instrument panel component 8 Crew 8a Knee 9 Concave part 10 Energy absorption member 10a Drink holder 11 Instrument panel mounting machine 12 Bracket for instrument panel mounting

Claims (3)

An instrument panel reinforcement extending in the vehicle width direction is attached to the side brackets installed at both ends in the vehicle width direction at the front of the cab, and a constricted portion formed at least on the driver seat side end of the instrument panel reinforcement; In the instrument panel structure of the vehicle in which a recess is formed to allow the movement of the seated occupant's knee forward when the vehicle collides with the instrument panel parts arranged so as to cover the constricted portion.
An energy absorbing member that absorbs energy by being deformed with the forward movement of the occupant's knee during a vehicle collision is disposed in the recess ,
In the recess, a knee bracket that absorbs energy by being deformed with forward movement of the occupant's knee at the time of a vehicle collision is attached so as to be juxtaposed with the energy absorbing member,
The knee bracket includes a flange portion that linearly extends from a base end side attached to the instrument panel reinforcement and has a distal end curved, and a web portion that is orthogonal to the flange portion.
The web portion is provided with notches at a plurality of required locations,
An instrument panel structure for a vehicle, wherein the knee bracket is arranged so as to be shifted from a center line passing through a reference point of the occupant's knee toward the center in the vehicle width direction .   An instrument capable of supporting an energy absorbing member, which is gripped by an instrument panel mounting machine when assembled to the side bracket of the instrument panel reinforcement in the recess, and is deformed at the time of a vehicle collision together with a constricted portion of the instrument panel reinforcement. The instrument panel structure for a vehicle according to claim 1, wherein a panel mounting bracket is provided.   The vehicle instrument panel structure according to claim 1, wherein the energy absorbing member is constituted by a drink holder.

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