JPH092294A - Position adjusting type steering gear - Google Patents

Abstract

PURPOSE: To relax impact applied to a body of a driver colliding with a steering wheel at the time of a collision accident. CONSTITUTION: At the time of collision, a displacing side bracket 2 is going to be displaced along with a steering column 7. A tilt bolt 3 has a tendency to remain on the fixed bracket 1 side. As a result, an engaging part 32 of a locking member 28 oscillatingly provided at the tilt bolt 3 is engaged with a through hole 27 formed in a horizontal plate part 26 of the displacing side bracket 2, so that the steering column 7 is prevented from being displaced frontward leaving a fixed bracket 1. This results in preventing a rear end part of an oblong hole 25 and the tilt bolt 3 from colliding with strong force so as to be able to relax impact applied to a body of a driver colliding with a steering wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The position adjustable steering device according to the present invention is used to adjust the position of a steering wheel according to the physique and driving posture of a driver. In particular, the present invention prevents a large impact from being applied to the body of the driver who bumps into the steering wheel in the event of a collision.

[0002]

2. Description of the Related Art In order to adjust the position of a steering wheel according to the physique and driving posture of a driver, a tilt type steering device or a position adjustable steering device called a telescopic steering device has been widely used. It has been implemented. Among these, the tilt type steering device adjusts the height position of the steering wheel, and the telescopic type steering device similarly adjusts the front and rear position. Further, a position-adjustable steering device in which the tilt type steering device and the telescopic steering device are combined to adjust the vertical position and front-back position of the steering wheel is also described in, for example, Japanese Utility Model Publication No. 1-147781. It has been known for a long time and is generally practiced.

The conventional structure known in this publication, etc. is a fixed side bracket, a displacement side bracket, a tilt bolt,
It has a tilt nut and a tilt lever. The fixed-side bracket has a pair of left and right support plate portions that are spaced from each other and is supported by the vehicle body. The displacement side bracket is fixed to the intermediate portion of the steering column and is arranged between the pair of support plate portions. The displacement side bracket is formed with a first elongated hole extending in the front-rear direction as a first through hole extending in the left-right direction. Further, a second elongated hole which is long in the vertical direction is formed as a second through hole at a position where a part of each of the support plate portions is aligned with the first elongated hole. Then, the tilt bolt is inserted through the first and second elongated holes. Further, the tilt nut is screwed into a portion projecting from the outer surface of one of the support plate portions at the tip of the tilt bolt. Further, the tilt lever has a base end portion coupled to either one of the tilt nut and the tilt bolt, and relatively rotates the tilt nut and the tilt bolt based on the swing.

Among the tilt nut and the tilt bolt, the member on the side to which the tilt lever is not coupled prevents rotation due to the engagement with the second elongated hole. That is, the head of the tilt bolt is connected when the base end of the tilt lever is connected to the tilt nut, and the tilt nut is connected when the base end of the tilt lever is connected to the head of the tilt bolt. The second long hole is freely (non-rotatably) engaged with only the displacement of the second long hole in the longitudinal direction.

When the position of the steering wheel is adjusted by the position-adjustable steering device constructed as described above, the tilt lever is swung in a predetermined direction so that the head of the tilt bolt and the tilt nut are moved. Widen the intervals. When the distance between the head of the tilt bolt and the tilt nut increases, the force with which the inner side surfaces of the pair of support plate portions forming the fixed side bracket presses the outer side surface of the displacement side bracket becomes weaker. The frictional force between them is reduced. As a result, by displacing the tilt bolt with respect to one or both of the first and second elongated holes, the longitudinal position and the vertical position of the displacement side bracket can be adjusted. Therefore, after moving the steering wheel to a desired position, the tilt lever is swung in the direction opposite to the predetermined direction. As a result, the distance between the head of the tilt bolt and the tilt nut is narrowed, and the force with which the inner side surfaces of the pair of support plate portions forming the fixed side bracket press the outer side surface of the displacement side bracket becomes stronger. The frictional force between the both side surfaces increases, and the steering wheel is supported at the desired position.

[0006]

SUMMARY OF THE INVENTION In the case of the conventional position adjustable steering device constructed and operated as described above,
In the event of a collision, the impact on the driver's body that hit the steering wheel could be large. The reason for this is as follows. In the case of the structure that fixes the position of the steering wheel by tightening the tilt bolt and the tilt nut, the force for fixing the position is due to the frictional force between the inner surface of the pair of support plates and the outer surface of the displacement side bracket. Yes, but this frictional force is limited. Therefore, when the driver's body collides with the steering wheel (secondary collision) due to a collision accident and an impact force is applied to the displacement side bracket via the steering column, the displacement side bracket is fixed. It may move relative to the bracket.

On the other hand, in order to absorb the impact applied to the driver's body in the case of a secondary collision, the steering column is an energy absorption type steering column which allows the steering wheel to move forward while absorbing the energy of the collision. Devices are commonly used. In order to effectively exhibit the shock absorbing performance of such an energy absorption type steering column device, the energy absorption (impact) is absorbed by the energy absorption member incorporated in the energy absorption type steering column device from the beginning of the secondary collision. It is necessary to start (initiate plastic deformation). On the other hand, when the displacement side bracket shifts with respect to the fixed side bracket as described above, the energy absorbing member does not start absorbing energy during the displacement, despite the secondary collision. . In this case, the energy absorbing member starts absorbing energy because the tilt bolt moves to the end of the first (or second) long hole, and the displacement side bracket is further than the fixed side bracket. This is after the displacement has stopped.

However, at the moment when the displacement side bracket shifts with respect to the fixed side bracket and the tilt bolt has moved to the end of the first (or second) long hole, the tilt side and the first side of the tilt bolt A large impact load (peak load) is applied to the driver's body hitting the steering wheel based on the collision with the end of the (or second) long hole. This peak load is smaller than the absolute value of the impact load applied to the driver's body at the time of the secondary collision, but it is not preferable because it enhances the protection of the driver. In view of such circumstances, the position adjustable steering device of the present invention is designed to reduce or eliminate the peak load.

[0009]

The position-adjustable steering device according to the present invention is similar to the above-described conventional position-adjustable steering device in that the left and right sides 1 are spaced apart from each other.
The pair of supporting plate portions is fixed to the fixed side bracket supported by the vehicle body and the intermediate portion of the steering column.
The displacement side bracket arranged between the pair of support plate portions, the first through hole formed in the displacement side bracket in the left-right direction, and the first side portion of each of the support plate portions. A second through hole formed at a position aligned with the through hole, a tilt bolt inserted through the first and second through holes, and an outer surface of one of the support plate portions at the tip of the tilt bolt. A tilt nut screwed to a portion protruding from the tilt nut and a base end portion of the tilt nut and one of the tilt bolts are coupled to each other, and the tilt nuts and the tilt bolts are relatively rotated based on rocking. And a tilt lever. Then, at least one of the first and second through holes is a long hole.

Particularly, in the position-adjustable steering device of the present invention, a part of a member having a through hole, which is an elongated hole, is provided with unevenness arranged in the longitudinal direction of the elongated hole. The steering column includes an engaging portion that engages with the uneven portion when the steering column is displaced forward, and a lock member that is engaged with a part of the tilt bolt.

[0011]

In the position-adjustable steering system of the present invention constructed as described above, when the steering column tends to be displaced forward in the event of a collision accident, the irregularities engage with the engaging portions. As a result of this engagement, the tilt bolt and the member having the elongated hole are not displaced, and the tilt bolt is prevented from being vigorously displaced to the end of the elongated hole. Therefore, it is possible to prevent the peak load from being generated due to the collision between the tilt bolt and the end of the long hole.

[0012]

1 to 5 show a first embodiment of the present invention corresponding to claim 1. This embodiment is one mode of a position adjusting type steering device, and the present invention is applied to a tilt type steering device for adjusting the height position of a steering wheel. This tilt type steering device includes a fixed side bracket 1 and a displacement side bracket 2.
A tilt bolt 3, a tilt nut 4, and a tilt lever 5.

The fixed-side bracket 1 is made by pressing a metal plate having sufficient rigidity, and has a pair of left and right support plate portions 6, 6 arranged at a distance from each other. However, it is supported by the vehicle body at the lower part of the dashboard and the like. However, this fixed side bracket 1 is forward (on the left side of FIGS. 1 and 2 and on the right side of FIGS. 4 and 5) due to a secondary collision.
When a strong force is applied to the vehicle, it loses its support for the vehicle body and is displaced forward. The absorption of impact energy by the energy absorbing member is started at the same time when the fixed bracket 1 starts to be displaced forward.

The displacement side bracket 2 is fixed to the lower surface of the intermediate portion of the cylindrical steering column 7 by welding or the like, and is disposed between the pair of support plate portions 6, 6.
The steering column 7 is formed by combining an inner column 8 and an outer column 9 in a telescope shape,
When a strong compressive load is applied due to a collision accident, the total length is shortened. A steering shaft 10 is rotatably supported inside the steering column 7. The steering shaft 10 also shortens its entire length when a strong compressive load is applied due to a collision accident.

The displacement side bracket 2 is formed with circular holes 11, 11 which are first through holes, respectively, in the left-right direction. In addition, elongated holes 12a and 12b, which are second through holes, are formed at positions where the support plate portions 6 and 6 are aligned with the circular holes 11 and 11, respectively. ing. Then, the tilt bolt 3 is inserted through the circular holes 11, 11 and the long holes 12a, 12b. Further, the tilt nut 4 is screwed at a tip portion of the tilt bolt 3 to a portion projecting from an outer side surface of one of the support plate portions 6 (right side in FIG. 3). Further, the tilt lever 5 has its base end coupled to the tilt bolt 3. Therefore, the tilt lever 5 rotates the tilt bolt 3 based on the swing.

The above-mentioned structure is the same as that of the tilt type steering device which has been widely known and practiced in the past. Particularly, in the case of the tilt type steering device of the present invention, of the elongated holes 12a and 12b, the tip portion of the rod portion 13 that constitutes the tilt bolt 3 (the right end portion in FIG. 3).
The width dimension W (FIG. 4) of the long hole 12a through which the diaper is inserted is sufficiently larger than the outer diameter dimension D (FIG. 3) of the rod portion 13 (W >>
D) Yes. Of course, the width dimension w (FIG. 2) of the other elongated hole 12b is also slightly larger than the outer diameter dimension D (w> D) so that the tilt bolt 3 can be displaced along the elongated holes 12a and 12b. . However, the width W of the slot 12a is
The size is sufficiently larger than the outer diameter dimension D of the rod portion 13 beyond the range required to freely displace the tilt bolt 3. The tilt bolt 3 has the elongated hole 12a when the tilt type steering device is assembled.
It is arranged so as to be biased to the rear side (on the steering wheel side, the left side in FIGS. 4 and 5).

Further, of the pair of support plate portions 6, 6, the rear end edge of the support plate portion 6 (on the right side in FIG. 3) in which the elongated hole 12a is formed (the right end edge in FIGS. 1 and 2; The left end edges 4 and 5) are formed in a corrugated form to form the concavities and convexities 14 arranged in the longitudinal direction of the elongated hole 12a.

Further, a lock member 15 is locked to the tilt nut 4. The lock member 15 is made by subjecting a metal plate having appropriate rigidity to plastic working such as press working or drawing. A taper cylinder portion 16 is formed at the center of the lock member 15, and the taper cylinder portion 16 is fitted onto the conical surface portion 17 of the tilt nut 4. Then, the lock member 15 is fixed to the tilt nut 4 by tightening the nut 19 screwed into the male screw portion 18 provided on the outer peripheral surface (the right end portion in FIG. 3) of the tilt nut 4. .

A flange-shaped disc portion 20 is provided on the outer peripheral edge of the large-diameter side opening of the tapered cylindrical portion 16. And
A pair of upper and lower engaging claws 2 are provided on both upper and lower edges of the disc 20.
The bent portions 22 and 22 are formed at the intermediate portions of the rear edges (left edges of FIGS. 4 and 5), respectively. These locking claws 2
1, 21 and the bent portion 22 are all the long holes 12
It is bent and formed in an L shape toward the support plate portion 6 on which a is formed. The locking claws 21 and 21 among them are loosely fitted inside the elongated hole 12a so as to be movable along the elongated hole 12a. Therefore, the lock member 15 is engaged with the elongated hole 12a only without being rotated, only for displacement along the length direction. Further, the bent portion 22 is bent toward the front end edge of the support plate portion 6. Then, a triangular projection 23 is formed on the front surface of the rear end portion of the bent portion 22 (right surface of the left end portion in FIGS. 4 and 5). The protrusion 23 is engageable with the unevenness 14 formed on the front edge of the support plate portion 6 having the elongated hole 12a. However, as shown in FIG. 4, the protrusion 23 and the unevenness 14 do not engage with each other in a state where a collision accident does not occur only by assembling the tilt type steering device.

Contrary to the illustrated embodiment, the lock member 15 may be fixed to the head 24 of the tilt bolt 3 and the base end of the tilt lever 5 may be fixedly connected to the tilt nut 4. In this case, the lock member 1 is attached to the head 24.
A conical surface portion for externally fitting the tapered cylindrical portion 16 of No. 4 and a male screw portion for screwing the nut 19 are formed. Of course, head 2
Widen the long holes 4 facing each other.

When the vertical position of the steering wheel is adjusted by the position adjusting type steering device constructed as described above, the tilt lever 5 is swung in a predetermined direction so that the head portion 24 of the tilt bolt 3 is moved. Increase the distance between the tilt nut 4 and the tilt nut 4. For example, in the case of the illustrated embodiment, a left-hand thread is formed at the threaded portion between the tilt bolt 3 and the tilt nut 4, and the tilt lever 5 is swung clockwise so that the head portion of the tilt bolt 3 is rotated. The gap between 24 and the tilt nut 4 is widened.

When the distance between the head portion 24 of the tilt bolt 3 and the tilt nut 4 is widened in this manner, the inner side surfaces of the pair of support plate portions 6, 6 constituting the fixed side bracket 1 become the displacement side bracket 2. The force pressing the outer surface is weakened, and the frictional force between these two side surfaces is reduced. As a result, the vertical position of the displacement side bracket 2 can be adjusted by moving the tilt bolt 3 up and down along the long holes 12a and 12b. At the time of this adjustment, as described above, the protrusion 23 and the unevenness 14 do not engage with each other. Therefore, after moving the steering wheel to a desired position, the tilt lever 5 is swung in the direction opposite to the predetermined direction (counterclockwise direction in FIG. 1). As a result, the distance between the head portion 24 of the tilt bolt 3 and the tilt nut 4 is narrowed, and the inner side surfaces of the pair of support plate portions 6, 6 constituting the fixed side bracket 1 press the outer side surface of the displacement side bracket 2. The power of doing becomes stronger. Then, the frictional force between these two side surfaces increases,
The steering wheel is supported at the desired position.

When the driver's body hits the steering wheel due to a collision accident, the steering shaft 1
0, the steering column 7, and the displacement side bracket 2 to the front of the tilt bolt 3 (left of FIGS. 1 and 2, FIGS.
(To the right of), a strong force is applied. As a result, the tilt bolt 3 is slightly displaced forward until it hits the front end of the elongated hole 12a. When the tilt bolt 3 is thus displaced forward, the locking claw portions 21, 21 of the lock member 15 supported by the tilt bolt 3 via the tilt nut 4 are plastically deformed as shown in FIG. Then, the displacement of the tilt bolt 3 is allowed. Based on this plastic deformation, the impact energy at the time of the secondary collision is absorbed, albeit slightly.

The tilt bolt 3 has the long hole 12a.
In the state in which it has been fully displaced to the front end portion, the projection 23 and the unevenness 14 engage with each other, as shown in FIG. Due to this engagement, the tilt bolt 3 cannot move along the long hole 12a. As a result, the steering column 7 to which the displacement side bracket 2 having the tilt bolt 3 inserted is fixed cannot move up and down with respect to the fixed side bracket 1, and the tilt bolt 3 is vigorously displaced to the end of the elongated hole 12a. Things are gone. Therefore, the tilt bolt 3 and the long hole 12a
It is possible to prevent the peak load from being generated due to the collision with the end of the.

Next, FIGS. 6 to 13 show a second embodiment of the present invention, which corresponds to the third aspect. The present embodiment is one mode of a position adjustable steering device, and the present invention is applied to a telescopic steering device that adjusts the front-rear position of a steering wheel. In addition, as shown in the figure,
It is free to implement this embodiment in combination with the above-described first embodiment. The same parts as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted. However, it is also possible to form a simple circular hole in the support plate portions 6 and 6 instead of the long holes 12a and 12b, and implement it as a simple telescopic steering device having no vertical position adjusting function. In this case,
Of course, the lock member 15 and the like may be omitted.

In the case of this embodiment, elongated holes 25, 25, which are first through holes, are formed in the front-rear direction (FIG. 7) on both side surfaces of the displacement side bracket 2 fixed to the lower surface of the steering column 7. Front and back direction, left and right direction of FIG. 6, 8-13)
Is formed over. Further, a plurality of through holes 27, 27 are formed in the horizontal plate portion 26 constituting the displacement side bracket 2 at equal intervals in the front-rear direction. The plurality of through holes 27, 27 form unevenness formed on the upper surface of the displacement side bracket 2 in the front-rear direction. That is, the through hole 27,
The portion 27 functions as a concave portion, and the portion between the through holes 27, 27 functions as a convex portion.

At the middle portion of the tilt bolt 3, an extended polishing type lock member 28 is locked on the upper portion of the unevenness so as to be swingable within a predetermined angle range with respect to the tilt bolt 3. That is, at the base end portion of the lock member 28, a circular hole 29 having an inner diameter dimension that allows the tilt bolt 3 to be inserted without rattling, and a fan-shaped cut extending from the circular hole 29 outward in the diameter direction. Forming a notch 30. or,
The cutout 30 is formed on the outer peripheral surface of the middle portion of the tilt bolt 3.
A key-shaped projecting piece 31 is projectingly provided at a portion aligned with. Therefore, the lock member 28 is swingable with respect to the tilt bolt 3 within a predetermined angle range in which the protrusion 31 can be displaced inside the notch 30.

A hook-shaped engaging portion 32 is formed at the tip of such a lock member 28. In this engaging portion 32, the displacement side bracket 2 is moved forward (see FIGS. 6 and 8 to 13) based on the engagement with the through holes 27, 27 that form the concave and convex portions.
(To the left of)) to prevent displacement. Further, a torsion coil spring 33 is provided between the lock member 28 and the displacement side bracket 2, and the engaging portion 32 is elastically pressed toward the upper surface of the horizontal plate portion 26 having the unevenness. There is.

In the case of this embodiment, the above-mentioned predetermined angle determined by the width dimension of the projection 31 and the notch 30 in the circumferential direction, and the phase between the projection 31 and the notch 30 are:
It is regulated as follows. First, the head 2 of the tilt bolt 3
4 and the tilt nut 4 are narrowed to fix the displacement side bracket 2 to the fixed side bracket 1, the tilt lever 5
In the state in which the
It swings according to the state of. That is, in this state, when the engaging portion 32 faces any of the through holes 27,
As shown in FIGS. 8 to 9, the engaging portion 32 enters the through hole 27. On the other hand, the engaging portion 32 has any through hole 27.
In the state where they do not face each other, as shown in FIGS. 10 to 11, the tip of the engaging portion 32 elastically abuts the portion between the adjacent through holes 27.

Next, in order to displace the displacement side bracket 2 with respect to the fixed side bracket 1, the tilt lever 5 is swung in the direction of increasing the distance between the head 24 of the tilt bolt 3 and the tilt nut 4. When the tilt bolt 3 is rotated, the engaging portion 32 is lifted from the horizontal plate portion 26 against the elastic force of the torsion coil spring 33 to form unevenness, as shown in FIGS. Through hole 27,
27 and the engaging portion 32 are no longer engaged.

When the front-back position of the steering wheel is adjusted by the position-adjustable steering device constructed as described above, the tilt lever 5 is swung in a predetermined direction so that the head 24 of the tilt bolt 3 is moved. Increase the distance between the tilt nut 4 and the tilt nut 4. By moving the tilt bolt 3 along the elongated holes 25, 25, the front-back position of the displacement side bracket 2 is adjusted. At the time of this adjustment, as shown in FIGS. 12 to 13, since the engaging portion 32 is lifted from the horizontal plate portion 26, the engaging portion 32 does not engage with the through holes 27, 27. . Therefore, after moving the steering wheel to a desired position, the tilt lever 5 is swung in a direction opposite to the predetermined direction to support the steering wheel at the desired position.

As described above, by swinging the tilt lever 5 in the direction opposite to the predetermined direction, the engaging portion 32 and the horizontal plate portion 26 are supported in the state where the steering wheel is supported at the desired position. The positional relationship is either the state shown in FIGS. 8 to 9 or the state shown in FIGS. 10 to 11.

When the driver's body hits the steering wheel due to a collision accident, the steering shaft 1
0, the displacement side bracket 2 via the steering column 7
A strong force is applied to the front (to the left in FIGS. 6 and 8 to 13). Due to this force, the displacement side bracket 2 tends to be displaced forward while the tilt bolt 3 supported by the fixed side bracket 1 remains. For this reason, if no measures are taken, the tilt bolt 3 has the long hole 25,
By reaching the rear end of 25 (the right end in FIGS. 6 and 8 to 13) and the tilt bolt 3 vigorously collides with this rear end, the driver's body bumping against the steering wheel is impacted. On the other hand, in the case of this embodiment, the tilt bolt 3 does not reach the rear end of the elongated holes 25, 25 due to the engagement between the engaging portion 32 and the through hole 27.

That is, as shown in FIGS.
2 and the through hole 27 are engaged before the collision,
From the beginning, the tilt bolt 3 is not displaced inside the long holes 25, 25. Further, as shown in FIGS.
When the tilt bolt 3 is slightly displaced inside the elongated holes 25, 25, the engaging portion 32 and the through hole 27 are not contacted with each other. Engage. After the engagement, the tilt bolt 3 is not displaced any more inside the elongated holes 25, 25. Therefore, the tilt bolt 3 does not move vigorously to the rear ends of the long holes 25, 25, and a peak load is generated due to the abutment between the tilt bolt 3 and the rear ends of the long holes 25, 25. To be prevented.

Next, FIG. 14 shows a third embodiment of the present invention, which also corresponds to claim 3. In the case of this embodiment, ratchet tooth-shaped irregularities 34 are formed in the front-rear direction on the upper surface of the central portion of the horizontal plate portion 26 constituting the displacement side bracket 2. Then, when the tilt bolt 3 tends to be displaced forward (to the left in FIG. 14), the unevenness 34 and the engaging portion 32 of the lock member 28 are engaged with each other. In the case of the present embodiment, the unevenness 34 and the engaging portion 3
The maximum length by which the tilt bolt 3 may be displaced before the engagement with 2 can be shortened as compared with the case of the second embodiment described above. Other configurations and operations are the same as in the above-described second embodiment.

As is apparent from the above description, in the case of this embodiment, it is necessary to rotate the tilt bolt 3 based on the swing of the tilt lever 5, unlike the case of the first embodiment described above. Is. If the tilt nut 4 is rotated without rotating the tilt bolt 3, desired effects cannot be obtained. More specifically, the front-rear position of the steering wheel cannot be adjusted.

[0037]

The position-adjustable steering system of the present invention is constructed and operated as described above, and can prevent the steering wheel from moving when an excessive load is applied to the steering wheel. The impact applied to the driver's body at the time of can be further reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged BB sectional view of FIG.

FIG. 4 is a diagram viewed from the right side of FIG.

5 is a C-C of FIG. 3 showing a deformed state at the time of a collision accident.
Sectional view.

FIG. 6 is a partial side view showing a second embodiment of the present invention.

FIG. 7 is an enlarged sectional view taken along line DD of FIG.

8 is a cross-sectional view taken along line EE of FIG. 7, showing a first example of the positional relationship between the lock member and the displacement-side bracket with a part omitted.

FIG. 9 is an enlarged view of part F in FIG.

10 is a cross-sectional view taken along line EE of FIG. 7, showing a second example of the positional relationship between the lock member and the displacement side bracket, omitting a part thereof.

11 is an enlarged view of part G in FIG.

12 shows a positional relationship between a lock member and a displacement side bracket in a state in which a tilt lever is swung when adjusting the position of a steering wheel, with a part thereof omitted; FIG.
E sectional view.

FIG. 13 is an enlarged view of part H in FIG.

FIG. 14 is a view similar to FIG. 8, showing a third embodiment of the present invention.

[Explanation of symbols]

 1 Fixed Side Bracket 2 Displacement Side Bracket 3 Tilt Bolt 4 Tilt Nut 5 Tilt Lever 6 Support Plate 7 Steering Column 8 Inner Column 9 Outer Column 10 Steering Shaft 11 Circular Holes 12a, 12b Long Hole 13 Rods 14 Unevenness 15 Lock Member 16 Tapered cylindrical part 17 Conical surface part 18 Male screw part 19 Nut 20 Disc part 21 Locking claw part 22 Bending part 23 Protrusion 24 Head part 25 Long hole 26 Horizontal plate part 27 Through hole 28 Lock member 29 Circular hole 30 Notch 31 Projecting piece 32 engaging part 33 torsion coil spring 34 unevenness

Claims (3)

[Claims] 1. A pair of left and right supporting plate portions spaced apart from each other, fixed to a fixed bracket supported by a vehicle body, and fixed to an intermediate portion of a steering column, said pair of supporting plate portions. Between the displacement side bracket, a first through hole formed in the displacement side bracket in the left-right direction, and a part of each of the support plate portions is aligned with the first through hole. The second through hole formed at the position, the tilt bolt inserted through the first and second through holes, and the tip portion of the tilt bolt at the portion protruding from the outer surface of one of the supporting plate portions. A tilt nut screwed together, and a tilt lever having a base end portion coupled to any one of the tilt nut and the tilt bolt and rotating the tilt nut and the tilt bolt relative to each other based on swinging. , Of the above-mentioned first and second through holes In a position-adjustable steering device in which at least one through hole is a long hole, a part of a member having a through hole that is a long hole is provided with unevenness arranged along the length direction of the long hole. , Having an engaging portion that engages with the uneven portion when the steering column is displaced forward,
A position-adjustable steering device comprising: a lock member locked to a part of the tilt bolt. 2. The second through hole is an elongated hole having a width dimension sufficiently larger than the outer diameter dimension of the rod portion constituting the tilt bolt, which is provided in the up and down direction. The unevenness is arranged on the rear side of the elongated hole, and the unevenness is a corrugated portion formed vertically on the rear end edge of at least one of the support plate portions, and the lock member is the end portion of the tilt bolt. It is locked directly to or via a tilt nut,
The rear edge portion of the lock member is provided with a bent portion that is bent rearward toward the rear end edge of the support plate portion that extends rearward and forms the corrugated portion. The position-adjustable steering device according to claim 1, wherein the position-adjustable steering device is a protrusion formed on the front surface of the end portion. 3. The first through hole is an elongated hole provided in the side surface of the displacement side bracket in the front-rear direction, and the unevenness is formed in the upper surface of the displacement side bracket in the front-rear direction.
The lock member is locked at the intermediate portion of the tilt bolt to the upper portion of the unevenness so as to be swingable within a predetermined angle range with respect to the tilt bolt, and the tip end of the lock member engages with the unevenness. Is provided with an engaging portion that prevents forward displacement of the displacement side bracket, and a spring that presses the engaging portion toward the unevenness is provided between the lock member and the displacement side bracket. The predetermined angle is the unevenness regardless of the elasticity of the spring when the tilt bolt is rotated by swinging the tilt lever to displace the displacement side bracket with respect to the fixed side bracket. The position-adjustable steering device according to claim 1, wherein the engagement between the engagement portion and the engagement portion is regulated at an angle at which the engagement portion is disengaged.