JP6539084B2 - Steering column device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a steering column apparatus that contracts with a steering shaft by an impact load during a secondary collision of a collision, and absorbs impact energy.

  As a steering column device of this type, as shown in FIG. 7, in the steering column device 101 of Patent Document 1, an outer column 103 fixed to the vehicle body side and an inside of the outer column 103 are provided movably in the vehicle longitudinal direction. Inner column 104, fastening means 105 for fastening the inner column 104 to the outer column 103, and impact absorbing means 106 for absorbing impact energy in the event of a secondary collision in which the occupant collides with the steering wheel due to a collision accident. And have.

  The fastening means 105 extends in the axial direction of the cylinder along the pair of clamp portions 132 erected from the outer column 103 with the inner column 104 therebetween, the operation shaft 151 penetrating the pair of clamp portions 132, and the inner column 104. A plurality of lock holes 154a are continuous in the longitudinal direction in a strip-shaped member disposed in a row, and are disposed on the lock plate 154 having a ladder shape and on the operation shaft 151, and the operation shaft 151 is rotated about its axis By doing this, the lock claw 155b is engaged with the lock hole 154a. The lock plate 154 is held at an arbitrary position by engaging the lock claw 155b with the portion of the case 154b that divides the adjacent lock holes 154a.

  The impact absorbing means 106 bends to bend the energy absorbing member provided between the lock plate 154 held at an arbitrary position and the inner column 104 when the inner column 104 moves forward due to a collision of the occupant. Shock energy is absorbed by deformation.

  Further, in the shock absorbing means 206 of the steering column device of Patent Document 2, as shown in FIG. 8, when the inner column moves forward due to a collision of the occupant, the lock plate 254 is torn to absorb impact energy. Do.

WO 2012/000593 A1 WO2009 / 121386A1

  By the way, in such a configuration of the shock absorbing means, a large space is required for installing, deforming or tearing the lock plates 154 and 254, which leads to an increase in the overall size of the apparatus. was there.

  In view of the above-described circumstances, the present invention has an object to provide a steering column device capable of absorbing impact energy without increasing the size of the entire device.

The invention of claim 1 has a cylindrical shape, and the outer column which is disposed along the vehicle longitudinal direction, a slit extending through said along the cylindrical wall of the outer column in the cylinder axis direction, the cylinder axis of the slit has a pair of clamp portions erected on the both edge portions in the direction, has a cylindrical shape, and an inner column which is movably inserted into the outer column tube axis direction within the shaft shaped, the an operating shaft disposed through the pair of clamping portions, the operating lever arranged on the operating shaft by rotational operation in the fastening direction about the axis, is narrowed between the pair of clamping portions, said inner column and locking means for fastening to the outer column, and together with the operation shaft while being disposed pivotally on the operating shaft around the axis, an eccentric cam member having an eccentric cam on the outer circumferential surface, the outer peripheral surface of the inner column On the cylinder axis A strip of sheet material arranged along the direction, a plurality of lock holes are opened in succession in the longitudinal direction, a lock plate having a ladder shape, one end of which is swingably supported by the outer column, the other end and support lever is disposed along the tube axis direction between the inner column and side is the eccentric cam member, said disposed between the lock plate and the support lever, disengaging resilient piece to the locking hole a pawl plate having a locking pawl formed of, rotational operation of with one end is engaged with the pawl plate, and the shock absorbing member and the other end is engaged with the outer column, the fastening direction of the operating shaft in, pressing the pawl plate to said locking plate said eccentric cam via the support lever moves the lock pawl into engageable locking position in the locking hole, said In'nako When a load is applied in the set value or more in the cylinder axis direction with respect to beam, the nail plate by said locking pawl is engaged with the locking holes, while moving together with the inner column to the tube axis direction, the in Rukoto deforming the impact absorbing member, and a shock absorbing means for absorbing impact energy, said impact absorbing member is a wire member bent in a U-shape in plan view, horizontal in the U-shaped A rod portion is locked to a pair of support members provided on the claw plate, and a vertical rod portion in the U-shape extends from the horizontal rod portion to the vehicle rear side, and is folded back by the operation shaft. while an end portion of the rod portion extends toward the front of the vehicle is locked to the outer column is characterized in Rukoto.

According to a second aspect of the present invention, in the steering column apparatus according to the first aspect, the support member is a hook-like member formed on the claw plate, and locks the cross bar portion of the shock absorbing member. It is characterized that you have had a hooked engaging portion.

The invention according to claim 3, in the steering column device according to claim 1 or claim 2, the pawl plate has a plurality of said locking pawl is continuous in the cylinder axis direction at different intervals from the locking hole pawl column is provided with a plurality adjacent to the operating shaft direction, these said pawl column is characterized in that it is arranged with a shift from each other in the cylinder axis direction.

  In the invention of claim 1, the locking means can be reliably locked by using the claw plate having the elastic claws. Further, by pressing the claw plate via the support lever, the claw plate moves together with the inner column, so that the claw plate can be engaged reliably and the engaged state can be maintained. Furthermore, since the impact absorbing member is deformed so as to be pulled while sliding on the support lever, the impact energy can be absorbed stably.

In the first aspect of the present invention, the impact absorbing means can be made smaller by using a wire material for the impact absorbing member. In addition, since it is bent and deformed at the portion wound around the operation shaft, the energy absorption load is stabilized. Thereby, impact energy can be absorbed without upsizing the whole apparatus.
In the invention of claim 2, since the support member is a hook-shaped member formed on the claw plate, the cross bar portion of the impact absorbing member can be locked to the hook-shaped locking portion.

  In the invention of claim 3, the claw plate includes a plurality of claw rows, and each claw row is arranged to be shifted in the cylinder axial direction, so that the lock claws of any of the claw rows engage with the lock holes. The free running section can be shortened, and the impact energy can be absorbed immediately after the impact energy is applied to the inner column.

It is a left side view showing one embodiment of the present invention. It is a top view showing one embodiment of the present invention. It is a bottom view showing one embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. It is a disassembled perspective view which shows the structure of the lock means of this embodiment, and an impact-absorbing means. It is a schematic diagram which shows operation | movement with the lock means of this embodiment, and an impact-absorbing means, (a) is a state where lock of lock means was released, (b) is a state where lock means was locked, (c) is inner It represents the state of absorbing the impact applied to the column. It is a perspective view showing a prior art steering column device. It is a perspective view which shows the impact-absorbing means of a prior art.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. As shown in FIGS. 1 to 6, the present embodiment is a steering column device 1 of a manual type. The steering column device 1 of the present embodiment includes a mounting bracket 2 for fixing to a vehicle body, an outer column 3 supported by the mounting bracket 2 so as to be able to swing in the vehicle vertical direction (tilt position adjustable), The inner column 4 supported by the outer column 3 so as to be movable in the longitudinal direction (telescopic position adjustable), the locking means 5 for integrally fastening the mounting bracket 2, the outer column 3 and the inner column 4, and the inner column 4 And shock absorbing means 6 for absorbing impact energy.

  The mounting bracket 2 includes a front fixing portion 21a fixed to a ceiling surface (not shown) of the vehicle body and a rear fixing portion 21b. The front side fixing portion 21a includes a pivoting portion 23 that pivotally supports the outer column 3 and the rear side fixing portion 21b includes a pair of hanging portions 22 depending from the left and right side edge portions. A tilt elongated hole 24 which defines a tilt position adjustment range along the vehicle vertical direction (tilt direction) is opened in the both hanging portions 22. The tilt long hole 24 is configured by an arc-like long hole centering on the pivotal support portion 23.

  The outer column 3 has a tubular shape, and is disposed between the pair of hanging portions 22 along the vehicle longitudinal direction. The outer column 3 is provided with a pivot support portion 30 at the upper edge portion on the front end side, and the pivot support portion 30 is pivotally supported by the pivot support portion 23 of the mounting bracket 2 via a bolt 23a. The rear end side of 3 swings in the vertical direction of the vehicle.

  Further, the outer column 3 is provided with a slit 31 extending along the cylinder axial direction from the rear end edge while penetrating the lower surface of the cylinder wall 3a. The dimension of the slit 31 in the axial direction of the cylinder is such that the inner column 4 inserted from the rear end of the outer column 3 is cut to the portion of the outer column 3 corresponding to the front end of the inner column 4 in the most contracted state after shock absorption. It is set to be embedded.

  Further, a pair of clamp portions 32 are provided upright at both edge portions of the slit 31 along the cylinder axis direction. The two clamp portions 32 are located on the rear end side of the slit 31 and are erected at a portion facing the hanging portion 22 along the vehicle vertical direction. Further, the operating shaft 51 penetrates through both the clamp portions 32 so as to be rotatable about the axis.

  Furthermore, the outer column 3 is provided with a telescopic elongated hole 34 extending along the cylinder axial direction while penetrating the cylinder wall 3a in the ceiling portion thereof.

  The inner column 4 has a cylindrical shape and is inserted in the cylinder of the outer column 3 so as to be movable in the cylinder axial direction. A steering shaft 11 is axially supported in the inner column 4 and the outer column 3. The steering shaft 11 includes a lower shaft 11 </ b> L pivotally supported in the outer column 3 and an upper shaft 11 </ b> U pivotally supported in the inner column 4. By spline-connecting the upper shaft 11U and the lower shaft 11L, the upper shaft 11U and the lower shaft 11L integrally rotate around the axis, and the upper shaft 11U is configured to be movable relative to the lower shaft 11L in the axial direction. It is done.

  Moreover, the stopper 41 is protrudingly provided by the outer peripheral surface of the inner column 4. The stopper 41 is inserted so as to be movable in the longitudinal direction in the telescopic elongated hole 34, and is set so as to break when a shear load equal to or greater than a set value is applied. Then, when the inner column 4 moves in the cylinder axis direction and the telescopic position adjustment is performed, the stopper 41 moves in the telescopic elongated hole 34, whereby the telescopic position adjustment range is defined.

  The lock means 5 includes an operation lever 51a, an operation shaft 51, a fixed cam 52a, and a rotating cam 52b.

  The operation shaft 51 has an axial shape, penetrates the tilt elongated holes 24 of the both depending portions 22 and the both clamp portions 32 of the outer column 3 along the vehicle width direction, and is supported rotatably around the axis There is. In addition, the operating shaft 51 has a washer, which engages with the outer surface of the right hanging portion 22R, fixed to one end side end by a nut via a thrust bearing, and the other end side has an integrally provided head A cam means 52 and an operation lever 51a are installed between the head portion and the outer surface side of the left side hanging portion 22L. The cam means 52 on the operation shaft 51 located between the operation lever 51a and the left side hanging portion 22L is composed of a fixed cam 52a and a rotation cam 52b. Further, the eccentric cam member 53 is rotatably disposed integrally with the operation shaft 51 at a position on the operation shaft 51 located between the two clamp portions 32.

  The fixed cam 52a has a wide annular shape in which the operation shaft 51 passes through the center of the fixed cam 52a, and the fixed cam surface is disposed facing the operation lever 51a. Further, the fixed cam 52 a has the back surface side of the fixed cam surface fitted in the tilt long hole 24 and is disposed so as not to rotate around the operation shaft 51 and vertically movable in the tilt long hole 24. Peak portions and valley portions are alternately formed in the circumferential direction on the fixed cam surface.

  The rotation cam 52b has a wide annular shape in which the operation shaft 51 passes through the center thereof, and the rotation cam surface is disposed so as to face the fixed cam surface. The rotation cam 52b is rotatably coupled integrally with the operation lever 51a, and is assembled to the operation shaft 51 so as to rotate around the operation shaft 51 together with the operation shaft 51 passing therethrough. Peak portions and valley portions are alternately formed in the circumferential direction on the rotating cam surface.

  The eccentric cam member 53 has a substantially cylindrical shape, and an eccentric cam 53a that protrudes in the radial direction is formed on the outer peripheral surface. Further, the operating shaft 51 is inserted so that the eccentric cam member 53 rotates around the axis together with the operating shaft 51.

  The lock plate 54 is formed of a strip-shaped plate material curved in an arc shape in the width direction, and is disposed on the outer circumferential surface of the inner column 4 along the axial direction. Further, in the lock plate 54, a plurality of lock holes 54a are continuously opened in the longitudinal direction, and are formed in a ladder shape.

  In the claw plate 55, a lock claw 55b, an elastic arm 55c, and a support member 55e are formed on a substrate 55a made of a rectangular plate having elasticity.

  The lock claw 55b is formed of an elastic piece which is obliquely cut and raised so as to be insertable into the lock hole 54a so as to cut and raise the vehicle rear side from the base 55a toward the lock plate 54. Further, the lock claw 55b constitutes a claw row 55d by being continuously cut and raised in the cylinder axial direction at equal intervals so as to be simultaneously engageable with the plurality of lock holes 54a of the lock plate 54. . Furthermore, similar claw rows 55d are provided on the substrate 55a so as to be adjacent to each other in the operation axis direction, and these claw rows 55d are set such that the intervals of the lock claws 55b in the cylinder axial direction deviate by half each other. ing.

  The elastic arm portions 55c are formed of elastic pieces which are cut at a corner of the claw plate 55 so as to be able to abut against the outer peripheral surface of the inner column 4 and higher than the lock claws 55b. .

  The support member 55e is a pair of hook-like members formed by bending the front end portion of the claw plate 55 downward at a substantially right angle, and has a locking portion of the shock absorbing wire 64 described later.

  The support lever 56 is formed of a rail-shaped member having a rectangular cross section, and is disposed in the slit 31 along the axial direction of the cylinder so as to be substantially parallel to the inner column 4 when the lock means 5 is locked. Further, one end of the support lever 56 is pivotally supported by a lever support portion 36 provided on the outer periphery of the outer column 3, and the other end side is held between the eccentric cam member 53 and the claw plate 55. . The eccentric cam member 53 and the support lever 56 are disposed so as to rotate between the pair of support members 55e. The configuration in which the claw plate 55 is pressed against the lock plate 54 via the support lever 56 prevents the force (frictional force) in the rotational direction of the eccentric cam member 53 from being transmitted to the claw plate 55, and causes the force in the radial direction. Are transmitted to the nail plate 55 only. As a result, when performing the locking operation, the inner column 4 can be fixed without being displaced in the cylinder axial direction from the desired position.

  The shock absorbing means 6 includes an operating shaft 51, an eccentric cam member 53, a lock plate 54, a claw plate 55, a support lever 56, and a shock absorbing wire 64 (shock absorbing member). Further, the shock absorbing means 6 includes an ironing portion 61 and an auxiliary shaft 62 in order to bend and deform the shock absorbing wire 64 in a simplistic manner.

  The ironing portion 61 has a cylindrical shape, and is set at portions positioned on both sides of the eccentric cam 53 a on the eccentric cam member 53.

  The shock absorbing wire 64 is inserted between the pair of clamp portions 32 so that the auxiliary shaft 62 is parallel to the operation shaft 51 and at least in a portion overlapping with the operation shaft 51 in the cylinder axis direction. They are spaced apart as possible. In addition, the absorption load of impact energy can be reduced by changing the position of the auxiliary shaft 62 in the direction to widen the distance between the auxiliary shaft 62 and the ironing portion 61, and the absorption load of impact energy at the position where the auxiliary shaft 62 is provided. It is easy to change the

  The impact absorbing wire 64 has a substantially U-shape in which the wire material is folded in half. The impact absorbing wire 64 has a half-folded portion serving as a horizontal bar portion on one end side locked and fixed to the pair of support members 55e, and a parallel portion serving as a longitudinal bar portion on the other end side in the cylinder axial direction The parallel portion of the shock absorbing wire 64 extends along the rear side of the vehicle, and the parallel portion of the shock absorbing wire 64 is folded back around the ironing portion 61 and passes through the gap between the ironing portion 61 and the auxiliary shaft 62 It is wired. Further, the parallel portion of the shock absorbing wire 64 wired forward is locked by the elastic force of the wire material to the wire pedestal 35 disposed on the outer peripheral surface of the inner column 4 in the slit 31. Then, the shock absorbing wire 64 absorbs impact energy by bending and deforming while being squeezed by the ironing portion 61.

  Next, an assembly procedure of the steering column device 1 of the present embodiment will be described. First, while inserting the lock plate 54 fixed to the inner column 4 and the wire pedestal 35 into the slit 31 of the outer column 3, the inner column 4 is inserted into the cylinder of the outer column 3. A resin collar 3 a is interposed between the outer column 3 and the inner column 4. The resin collar 3 a is locked to the inner surface of the outer column 3.

  Next, the outer column 3 is disposed between the hanging portions 22 of the mounting bracket 2, and while the shaft support portion 30 of the outer column 3 is supported by the shaft support portion 23 of the mounting bracket 2, the outer column using the suspension spring 14 Suspend 3 on the mounting bracket 2.

  Further, the support lever 56 is pivotably arranged on the lever support portion 36 via the lever pin 36a. Then, the claw plate 55 is disposed between the rear end side of the support lever 56 and the lock plate 54, and the eccentric cam member 53 in which the shock absorbing wire 64 is wound around the ironing portion 61 is disposed in the support lever 56. . Then, while inserting the parallel portion of the impact absorbing wire 64 from the front side to the rear side into the gap between the eccentric cam member 53 and the inner column 4, the double-folded portion on one end side is fixed to the support member 55 e.

  Next, the operation shaft 51 is assembled to the mounting bracket 2 and the outer column 3 while penetrating the eccentric cam member 53. The operation shaft 51 includes the operation lever 51a, the rotation cam 52b, the fixed cam 52a, the tilt elongated hole 24 of the left hanging portion 22L, the left clamp portion 32L, the eccentric cam member 53, the right clamp portion 32R, and the right in FIG. Through the tilt elongated holes 24 of the hanging portion 22R in this order, and further penetrating the washer and thrust bearing on the outside of the right side hanging portion 22R, a nut is screwed and assembled.

  Then, the shock absorbing wire 64 is folded while being wound around the ironing portion 61, passes through the gap between the ironing portion 61 and the auxiliary shaft 62, and the parallel portion is routed forward. Then, the parallel portion of the shock absorbing wire 64 wired forward is locked and held on the wire pedestal 35 by the elastic force of the wire material. Then, the upper shaft 11U is spline-connected to the lower shaft 11L and is inserted from the front end side of the outer column 3, and the lower shaft 11L is axially supported in the cylinder of the outer column 3 via the outer bearing 12 The upper shaft 11U is pivotally supported in the cylinder of the inner column 4 through 13.

  Next, an operation procedure of the steering column device 1 of the present embodiment will be described.

  In order to fix the inner column 4 at a desired position, first, move the control lever 51a upward by moving the inner column 4 to the desired position in the tilt direction (the vehicle vertical direction) and the telescopic direction (the vehicle longitudinal direction). Swing operation. By swinging the control lever 51a upward, the control shaft 51 is pivoted about the axis in the fastening direction.

  By rotating the rotation cam 52b integral with the operation lever 51a in the fastening direction together with the operation shaft 51, the peaks of the fixed cam 52a and the peaks of the rotation cam 52b overlap, and the axial dimension is expanded. As a result, the operation shaft 51 is pulled toward the cam means 52, and the hanging portion 22 and the clamp portion 32 are pressed against each other, the outer column 3 is held at an arbitrary tilt position, and the space between the pair of clamp portions 32 narrows. Then, the diameter of the outer column 3 is reduced, and the inner column 4 is held at an arbitrary telescopic position.

  Further, as the operation shaft 51 rotates in the fastening direction, the eccentric cam member 53 rotates, and the eccentric cam 53 a presses the claw plate 55 against the lock plate 54 via the support lever 56. By pressing the claw plate 55 against the lock plate 54, one of the lock claws 55b is inserted into one of the lock holes 54a, and the tip of the inserted lock claw 55b divides the respective lock holes 54a. It is possible to engage the part. Also, when the claw plate 55 is pressed against the lock plate 54, if the other lock claw 55b is positioned on the case 54b, the lock claw 55b is retracted with respect to the pressing direction while being pressed by the case 54b. To be elastically deformed. Thus, the rotation operation of the operation shaft 51 is not disturbed, and any one of the lock claws 55b engages with the case 54b.

  Further, in order to adjust the position of the inner column 4, the fastening of the inner column 4 and the outer column 3 is released. For this purpose, first, the control lever 51a is operated to swing downward (release direction). By swinging the operating lever 51 a downward, the operating shaft 51 is pivoted around the axis in the fastening release direction.

  By rotating the rotation cam 52b integral with the operation lever 51a in the fastening release direction together with the operation shaft 51, the peak portion of the fixed cam 52a and the valley portion of the rotation cam 52b overlap, and the axial dimension of the cam means 5a narrows . As a result, the operating shaft 51 is loosened, and the pressure contact between the hanging portion 22 and the clamp portion 32 is eliminated, and the outer column 3 can be moved in the tilt direction (the vehicle vertical direction) with respect to the mounting bracket 2 By expanding the space between the portions 32, the diameter of the outer column 3 is expanded, and the inner column 4 can be moved in the telescopic direction (the vehicle longitudinal direction).

  Further, as the operation shaft 51 rotates in the fastening release direction, the eccentric cam member 53 rotates, and the eccentric cam 53 a moves in the direction away from the outer circumferential surface of the inner column 4. Then, the lock claw 55b is separated from the lock hole 54a by the elastic force of the elastic arm 55c, and the lock is released.

  When the impact load exceeding the set value is applied to the inner column 4 in a state in which the operation lever 51a is fastened and the inner column 4 is fastened to the outer column 3, the lock claw 55b engaged with the lock hole 54a is By pressing the case 54b, the claw plate 55 moves forward with the inner column 4, and the claw plate 55 moves forward in the axial direction of the cylinder together with the half-folded portion of the impact absorbing wire 64. At this time, impact energy is absorbed by bending and deforming the shock absorbing wire 64 while being interposed by the ironing portion 61 and the auxiliary shaft 62.

  As mentioned above, according to the said embodiment, locking of the lock means 5 can be performed reliably by using the nail | claw plate 55 which has an elastic nail | claw. Further, by pressing the claw plate 55 via the support lever 56, the claw plate 55 moves together with the inner column 4, so that the claw plate 55 can be reliably engaged, and the engagement can be maintained. . Further, since the impact absorbing member 64 is deformed so as to be pulled while sliding on the support lever 56, the impact energy can be absorbed stably.

  By using a wire material for the impact absorbing member, the impact absorbing means 6 can be made smaller. Further, since the parallel portion of the impact absorbing wire 64 wound around the operation shaft 51 is bent and deformed, the energy absorbing load is stabilized. Thereby, impact energy can be absorbed without upsizing the whole apparatus.

  The claw plate 55 includes a plurality of claw rows 55d, and the claw rows 55d are arranged to be shifted in the cylinder axial direction, whereby the lock claws 55b of any of the claw rows 55d engage with any of the lock holes 54a. Therefore, the free running section can be shortened, and the impact energy can be absorbed immediately after the impact energy is applied to the inner column.

  By providing the telescopic elongated hole 34 and the stopper 41, normally, while the position of the inner column 4 is adjusted within the telescopic position adjustment range, the stopper 41 can be broken at the time of shock absorption to absorb impact energy.

  In the claw plate 55 of the present embodiment, the spacing in the axial direction of the lock claws 55b in each claw row 55d is constant, but the spacing between the lock claws 55b may be set differently for each claw row 55d. In addition, in the same nail row 55d, the interval between the lock claws 55b may be changed. As a result, it is possible to further shorten the free running section until the lock claw 55b, which is engaged with the lock 54b of the lock hole 54b, is first pushed.

  Further, in the steering column device 1 of the present embodiment, the telescopic elongated hole 34 is provided in the outer column 3 and the stopper 41 is disposed in the inner column 4. However, the telescopic elongated hole 34 is provided in the inner column 4. Even when the stopper 41 is disposed at 3, the same function and effect as the present embodiment can be obtained.

  Although the support member 55e of the present embodiment is provided on the vehicle front side of the claw plate 55, it may be provided on the vehicle rear side of the claw plate 55 or may be provided on both the front and rear sides. Further, the support member 55e can be engaged with the support lever 56 to prevent the claw plate 55 from being displaced in the left-right direction, and providing the support member 55e on the vehicle rear side of the claw plate 55 is more on the vehicle front side. Also, the lateral displacement of the claw plate 55 can be further prevented.

DESCRIPTION OF SYMBOLS 1 ... Steering column apparatus 3 ... Outer column 3a ... Cylinder wall 4 ... Inner column 5 ... Locking means 6 ... Shock absorption means 31 ... Slit 32 ... Clamp part 34 ... Telescopic slot 41 ... Stopper 51 ... Operation axis 52 ... Cam means 53 ... Eccentric cam member 53a ... Eccentric cam 54 ... Lock plate 54 a ... Lock hole 55 ... Claw plate 55 b ... Lock claw 55 d ... Claw row 56 ... Support lever 64 ... Shock absorbing member (shock absorbing wire)

Claims (3)

An outer column having a cylindrical shape and disposed along the longitudinal direction of the vehicle;
A slit which penetrates along the cylindrical wall of the outer column in the cylinder axis direction,
A pair of clamping portions erected on the both edge portions along the cylinder axis direction of the slit,
Has a cylindrical shape, and an inner column which is movably inserted into the outer column tube axis direction in,
Has a shaft shape, and the operation shaft which is disposed through the pair of clamping portions, the operating lever arranged on the operating shaft by rotational operation in the fastening direction about the axis, the pair of clamping portions It narrows between, and locking means for fastening the inner column to the outer column,
Together is arranged pivotally the upper operating shaft around the axis together with the operating shaft, and the eccentric cam member having an eccentric cam on the outer circumferential surface, it is disposed along the tube axis direction on an outer peripheral surface of the inner column A lock plate having a ladder shape in which a plurality of lock holes are continuously opened in a longitudinal direction in a strip-like plate material
One end of which is swingably supported by the outer column, and support lever the other end side are disposed along the tube axis direction between the inner column and the eccentric cam member,
Wherein disposed between the lock plate and the support lever, the pawl plate having a locking pawl formed of disengageable elastic piece to the locking hole,
One end is engaged with the pawl plate, and the shock absorbing member and the other end is engaged with the outer column,
In turning operation of the engagement direction of the operation shaft, pressing the pawl plate to said locking plate said eccentric cam via the support lever moves the lock pawl into engageable locking position to the lock hole , when a load is applied in the set value or more in the cylinder axis direction with respect to the inner column, said pawl plate by said locking pawl is engaged with the lock hole is moved together with the inner column to the tube axis direction while, in Rukoto deforming the impact absorbing member, and a shock absorbing means for absorbing impact energy,
The impact absorbing member is a wire member bent in a U-shape in a plan view, and a cross bar portion in the U-shape is engaged with a pair of support members provided on the claw plate, and the U-shape with vertical bar portion in a shape extending from said cross-bar to the vehicle rear side, is folded by the operating shaft, an end portion of the vertical bar portion while extending toward the vehicle front side is locked to the outer column Rukoto Steering column device characterized by In the steering column device according to claim 1,
A steering column characterized in that the support member is a hook-shaped member formed on the claw plate, and has a hook-shaped locking portion for locking the cross bar portion of the shock absorbing member. apparatus. In the steering column device according to claim 1 or 2,
Wherein the pawl plate, nail row a plurality of said locking pawl is continuous in the cylinder axis direction at different intervals from the locking hole is provided with a plurality adjacent to the operating shaft direction,
These said pawl column, steering column apparatus characterized by being arranged with a shift from each other in the cylinder axis direction.

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