JP2008296754A - Position adjustment type steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering device that can certainly hold a steering shaft at a sliding contact position between outer and inner columns of a steering column without rattling of the outer and inner columns when the steering column is divided into the outer and inner columns. <P>SOLUTION: The steering device includes a steering column 12 that rotatably supports a steering shaft and has an extensible inner column 12B and an outer column 12A, and a vehicle-side bracket 21 for supporting the steering column 12 so that the position of the steering column is adjustable. The outer column 12A supports the inner column 12B in the inside thereof facing the vehicle-side bracket 21, and is provided with a pair of, left and right support pieces 31 and 32 formed with slot holes 31e and 32e for telescopic adjustment through which fastening bolts 42 are inserted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a position-adjustable steering apparatus that includes a steering column that rotatably supports a steering shaft, and has a telescopic inner column and an outer column, and a vehicle body side bracket that supports the steering column in a position-adjustable manner. About.

As this type of position-adjustable steering system, the applicant previously proposed the vehicle body side upper bracket and the lower bracket to support the integral steering column so that it can be tilted and telescopically operated. A bulging portion that bulges downward is formed at a position facing the upper bracket, and a spacer having a telescopic adjustment long hole formed around the fastening bolt that penetrates the bulging portion is opposed to the bulging portion. There is known a steering column device which is arranged so as to be sandwiched inside a flat portion, and the surface rigidity of the flat portion of the bulging portion is improved by bringing the outer peripheral surface of the steering shaft into contact with the upper surface of the spacer. (For example, refer to Patent Document 1).
JP 2004-338549 A (page 4, FIGS. 1 and 2)

  However, in the conventional example described in Patent Document 1, when the steering wheel is telescopically adjusted, the entire steering column is moved in the axial direction so that the telescopic operation is performed. This requires an occupied volume including the amount of movement of the steering column, and there is an unsolved problem that the degree of freedom in vehicle layout is reduced.

  In order to solve this unsolved problem, the steering column is composed of an outer column and an inner column that are slidable with each other to prevent the steering column from sliding on the vehicle body side lower bracket side. It is considered that the pivot shaft is fixed so as to be swingable in the vertical direction. With this configuration, the steering column does not slide on the vehicle body side lower bracket side during telescopic operation, so there is no need to secure extra space and the degree of freedom in vehicle layout can be improved. Since the steering column is divided into the outer column and the inner column, it is difficult to hold the outer column and the inner column with high rigidity without looseness while securing the slidability when adjusting the position. There is a new issue.

  Therefore, the present invention has been made paying attention to the unsolved problems of the above-mentioned conventional example, and when the steering column is divided into two parts, an outer column and an inner column, both can be connected with high rigidity without play. An object of the present invention is to provide a steering device that can be used.

  In order to achieve the above object, a position-adjustable steering apparatus according to a first aspect of the present invention includes a steering column that rotatably supports a steering shaft, a telescopic column having an extendable inner column and an outer column, and a position adjustment of the steering column. A position-adjustable steering apparatus including a vehicle body side bracket that supports the vehicle body side, wherein the outer column is inserted through the inside facing the vehicle body side bracket to support the inner column and to insert a tightening bolt. A pair of left and right support pieces in which holes are formed are provided.

According to a second aspect of the present invention, in the position-adjustable steering device according to the first aspect, the pair of support pieces engage with an axial positioning portion formed on an inner peripheral surface of the outer column. It is characterized by having.
Furthermore, the position-adjustable steering apparatus according to claim 3 is the invention according to claim 1 or 2, wherein the outer column has a semi-cylindrical portion and a semi-cylindrical portion having a longitudinal cross-sectional shape facing the vehicle body side bracket. Each of the pair of support pieces is a semi-cylindrical portion, and a pair of bottom plate portions extending inward from the free ends of the opposite side plate portions. An engagement support surface that engages and supports the lower outer peripheral surface of the inner column that is inscribed therein, an engagement side surface that is connected to the engagement support surface and engages with the opposite side plate portion, and the engagement side surface An engagement bottom surface that engages with the lower surface plate portion and an inner side surface that connects between the engagement bottom surface and the engagement support surface; and between the engagement side surface and the inner side surface The telescopic adjustment long hole is formed, and the inside of the pair of support pieces There has been characterized by being disposed to face a predetermined distance.

Furthermore, a position-adjustable steering apparatus according to a fourth aspect is characterized in that, in the invention according to any one of the first to third aspects, the synthetic resin material is formed by injection molding.
Still further, the position-adjustable steering device according to claim 5 is the invention according to any one of claims 1 to 3, wherein the pair of support pieces is a metal material such as aluminum, aluminum alloy, magnesium, magnesium alloy, or the like. It is characterized by being formed by die casting.

  According to the present invention, the outer column is provided with a pair of left and right support pieces formed with telescopic adjustment long holes for supporting the inner column and inserting the tightening bolts, in the interior facing the vehicle body side bracket. Therefore, the inner column can be supported at three points by the pair of support pieces and the upper inner peripheral surface of the outer column, and the inner column can be reliably connected by the outer column without play. It is done.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is an overall configuration diagram showing a vehicle in which a position-adjustable steering apparatus according to the present invention is assembled, FIG. 2 is a side view of the position-adjustable steering apparatus, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 4 is a perspective view showing the steering column, FIG. 5 is a side view showing a part of the bracket facing the bracket of the outer column, FIG. 6 is a sectional view taken along the line BB in FIG. 5, and FIG. It is a side view.

  In FIG. 1, a position-adjustable steering apparatus 10 includes a steering column 12 that supports a steering shaft 11 so as to be rotatable. A steering wheel 13 is mounted on the steering shaft 11 at the rear end of the vehicle, and an intermediate shaft 15 is connected to the front end of the vehicle via a universal joint 14. A steering gear 17 including a rack and pinion mechanism is connected to the intermediate shaft 15 via a universal joint 16 at the front end of the vehicle. The output shaft of the steering gear 17 is connected to the steered wheel 19 through a tie rod 18.

  When the driver steers the steering wheel 13, the rotational force is transmitted to the steering gear 17 via the steering shaft 11, the universal joint 14, the intermediate shaft 15, and the universal joint 16, and the rack and pinion constituting the steering gear 17. The rotating motion is converted into a linear motion in the vehicle width direction by the mechanism, and the steered wheel 19 is steered through the tie rod 18.

  As shown in FIGS. 2 to 4, the steering column 12 has an outer column 12A disposed on the rear side of the vehicle (right side in FIG. 2) and a slidably fitted to the outer column 12A. The inner column 12B is arranged on the side (left side in FIG. 2). Similarly, the steering shaft 11 rotatably supported by the steering column 12 is also divided at the intermediate portion (not shown), and both are splined or serrated to slide in the axial direction but are restricted in the rotational direction. Are connected to each other.

The outer column 12A is supported at its vehicle front side end portion by a vehicle body side upper bracket 21 so that it can be tilted and telescopically operated. The inner column 12B has its vehicle front side end portion pivoted to the vehicle body side lower bracket 22 as a pivot shaft. 23 is supported so as to be swingable in the vertical direction.
Here, as shown in FIG. 3, the vehicle body side upper bracket 21 is suspended in parallel with a vehicle body side mounting plate portion 21a attached to the vehicle body side member and a predetermined distance from the bottom surface of the vehicle body side mounting plate portion 21a. And a pair of opposed side plates 21b and 21c.

  Further, as shown in FIG. 2, a steering lock device 24 is attached to a substantially central portion in the axial direction of the outer column 12A. In the steering lock device 24, when an ignition key (not shown) is pulled out when the vehicle is parked or stopped, the locking pin 24a is fitted into the locking groove 24b of the steering shaft 11, so that the steering shaft 11 is fixed to the outer column 12A. It has a function of locking so as not to rotate, and theft of the vehicle can be prevented.

  As shown in FIG. 4, the outer column 12 </ b> A has a cylindrical portion 26 formed on the vehicle rear side and the vehicle front end, and is connected to the cylindrical portion 26 so as to face the vehicle body side upper bracket 21. And a bracket facing portion 27 that is formed by a hydroforming method. As shown in FIGS. 4 and 5, the bracket facing portion 27 includes a semi-cylindrical portion 27a connected to the upper side of the cylindrical portion 26 and a bulging portion 27b bulging downward from the semi-cylindrical portion 27a. Yes. As shown in FIG. 6, the bulging portion 27b includes curved portions 27c and 27d extending downward while gradually bulging outward from both ends of the semi-cylindrical portion 27a, and downward from the lower ends of the curved portions 27c and 27d. A pair of opposing side plate portions 27e and 27f, and bottom plate portions 27g and 27h extending inwardly from the lower ends of these opposing side plate portions 27e and 27f. The inner end surfaces of the bottom plate portions 27g and 27h are shafts. Opposite each other by a predetermined distance X1 so as to form a directional slit 27i. Here, the axial slit 27i is formed over at least the axial length facing the support pieces 31 and 32 described later.

  Here, the telescopic adjustment length is extended by a predetermined length in the axial direction through which a later-described tightening bolt 42 is inserted into the opposed position of the opposed side plate portions 27e and 27f of the bulging portion 27b in the bracket facing portion 27 of the outer column 12A. A hole 27j is formed, and an engagement protrusion 27k as an axial positioning portion extending in the left-right direction as shown in FIGS. 4 and 5 is formed at a substantially central position in the axial direction of the bottom plate portions 27g and 27h. Yes. Further, as shown in FIG. 5, a circumferential slit 27m cut from the lower side is formed at a position adjacent to the front side of the vehicle in the bracket facing portion 27, and the circumferential slit 27m defines the bulging portion 27b. It is easy to deform inward in the width direction.

  As shown in FIG. 6, a pair of left and right support pieces 31 and 32 formed in the bulging portion 27b are symmetrical with respect to a vertical line L1 passing through the center of the cylindrical portion 26 of the outer column 12A. It is arranged. Here, the support pieces 31 and 32 are formed by injection-molding a synthetic rigid resin material or die-casting a metal material such as aluminum, aluminum alloy, magnesium, or magnesium alloy.

  As shown in FIGS. 4 to 7, the support piece 31 is in contact with and supported by the lower left outer peripheral surface of the inner column 12B slidably fitted to the outer column 12A, An engagement side surface 31b connected to the engagement support surface 31a and engaged with the inner side surface of the opposing side plate portion 27e of the bulging portion 27b, and a bottom surface plate portion 27g of the bulging portion 27b connected to the engagement side surface 31b. And an inner side surface 31d connecting the engagement bottom surface 31c and the engagement support surface 31a. A telescopic adjustment long hole 31e extending in the axial direction is formed between the engagement side surface 31b and the inner side surface 31d.

  Similarly, as shown in FIGS. 4 to 7, the support piece 32 contacts and supports the lower right outer peripheral surface of the inner column 12 </ b> B that is slidably fitted to the outer column 12 </ b> A. 32a, an engagement side surface 32b connected to the engagement support surface 32a and engaged with the inner surface of the opposing side plate portion 27f of the bulge portion 27b, and a bottom surface of the bulge portion 27b connected to the engagement side surface 32b. It has an engagement bottom surface 32c that engages with the face plate portion 27h, and an inner side surface 32d that connects the engagement bottom surface 32c and the engagement support surface 32a. A telescopic adjustment long hole 32e extending in the axial direction is formed between the engagement side surface 32b and the inner side surface 32d.

  Further, as shown in FIG. 7, the engagement recesses 31 f and 32 f that engage with the engagement protrusions 27 k formed on the bulging portion 27 b at substantially the center in the axial direction of the engagement bottom surfaces 31 c and 32 c of the support pieces 31 and 32. Is formed. Further, as shown in FIG. 6, the inner surfaces 31d and 32d of the support pieces 31 and 32 are separated by a distance X2 longer than the distance X1 between the bottom plate portions 27g and 27h of the bulging portion 27b described above. An axial slit is formed.

  And in the bulging part 27b of the outer column 12A, the supporting pieces 31 and 32 are engaged with the engaging protrusions 27k formed in the bulging part 27b so that the engaging concave parts 31f and 32f are engaged with the supporting piece 31 and By inserting the inner column 12B while restricting the movement of the shaft 32 in the axial direction, as shown in FIG. 6, the upper end side of the inner column 12B is in line contact with the inner peripheral surface of the semi-cylindrical portion 27a of the outer column 12A. Thus, the left and right positions on the lower end side are brought into surface contact with the engagement support surfaces 31a and 32a of the support pieces 31 and 32 to be in a three-point support state, and the inner column 12B can be supported in the outer column 12A without backlash. it can.

A clamp mechanism 40 is provided on the vehicle body side upper bracket 21.
The clamp mechanism 40 includes a tilt adjusting long hole 41 extending in a tangential direction of an arc centering on the central axis of the pivot shaft 23 formed on the opposing side plates 21b and 21c of the vehicle body side upper bracket 21, and these opposing side plates 21c. The telescopic adjustment long hole 27j formed in the bulging portion 27b of the outer column 12A from the tilt adjustment long hole 41 side and the telescopic adjustment long holes 31e and 32e formed in the support pieces 31 and 32 are tightened. And attachment bolts 42.

The tightening bolt 42 is prevented from rotating by a guide protrusion 42b formed on the back side of the head 42a engaging with the tilt adjusting long hole 41. A cam lock mechanism 45 is provided.
As shown in FIG. 3, the cam lock mechanism 45 includes a first cam member 45 a and a second cam member 45 b, and the first cam member 45 a is externally fitted to the fastening bolt 42 and integrated with the operation lever 43. Rotate to. The second cam member 45b is externally fitted to the fastening bolt 42 so as to be movable in the axial direction, and engages with the tilt adjusting long hole 41 of the opposing side plate 21b so as to move vertically along the long hole 41. It can be moved in a non-rotating state. As the first cam member 45a rotates, the second cam member 45b moves in the axial direction to the lock position and the lock release position while engaging the peak or valley of the first cam member 45a. Further, an adjustment nut 45d is screwed to a thread portion of the tightening bolt 42 protruding outside the cam lock mechanism 45 via a thrust bearing 45c.

As shown in FIG. 3, when the operation lever 43 is rotated by the clamp mechanism 40 during the tightening at the tilt / telescopic adjustment position, the second cam member 45b of the cam lock mechanism 45 moves to the right in the axial direction. The opposing side plates 21b and 21c are tightened via the tightening bolts 42.
On the other hand, when the operation lever 43 is rotated at the time of releasing the tightening of the tilt / telescopic adjustment position, the second cam member 45b of the cam lock mechanism 45 moves to the left in the axial direction, and the tightening of the opposing side plates 21b and 21c is released. The

Next, the operation of the above embodiment will be described.
To attach the steering device 10 to the vehicle body, first, the steering column 12 is assembled. The steering column 12 is assembled by inserting the inner column 12B through the outer column 12A on the vehicle body side upper bracket 21 side so as to be slidable in the axial direction. At this time, the support pieces 31 and 32 are fixed in the bulging portion 27b of the bracket facing portion 27 of the outer column 12A. The support pieces 31 and 32 engage their engagement side surfaces 31b and 32b with the opposing side plate portions 27e and 27f, engage the engagement bottom surfaces 31c and 32c with the bottom plate portions 27g and 27h, and engage with each other. By engaging the recesses 31f and 32f with the engagement protrusions 27k formed on the bottom plate portions 27g and 27h of the bulging portion 27b, the bulging portion 27b is fixed in a state in which axial movement is restricted. .

  In this manner, by inserting the inner column 12B from the vehicle front side end portion of the outer column 12A with the support pieces 31 and 32 fixed in the bulging portion 27b of the bracket facing portion 27 of the outer column 12A, The inner column 12B has an upper end outer peripheral surface in line contact with the inner peripheral surface of the semi-cylindrical portion 27a of the bracket facing portion 27, and a lower end left and right outer peripheral surface in surface contact with the engagement support surfaces 31a and 32a of the support pieces 31 and 32. Thus, the three-point support state is established, and the inner column 12B is stably held on the bracket facing portion 27 of the outer column 12A without play.

  In this state, the steering shaft 11 is rotatably supported by a rolling bearing (not shown) in the outer column 12A and the inner column 12B, and then the bracket facing portion 27 of the outer column 12A is opposed to the opposite side plate of the vehicle body upper bracket 21. The telescopic adjustment long holes 27j, 31e, and 32e are mounted between 21b and 21c in a state where they are communicated with the tilt adjustment long hole 41. In this state, the tightening bolt 42 is inserted from the side of the tilt adjustment long hole 41 in the opposing side plate 21c of the vehicle body side upper bracket 21, and the telescopic adjustment long hole 27j formed in the bulging portion 27b of the outer column 12A. The tip is projected from the tilt adjustment long hole 41 of the opposing side plate 21b through the telescopic adjustment long holes 31e and 32e formed in the support pieces 31 and 32, and at the same time, the guide protrusion 42b is used for the tilt adjustment of the opposing side plate 21c. Engage in the long hole 41 to prevent the tightening bolt 42 from rotating.

Next, the clamp mechanism 40 is attached to the end protruding from the tilt adjustment long hole 41 of the tightening bolt 42, and finally the adjustment nut 45d is screwed into the outer column 12B so that the inner column 12B is slidably supported. The column 12A can be mounted on the vehicle body side upper bracket 21.
Further, in a state where the intermediate shaft 15 and the universal joint 16 are connected to the steering shaft 11 protruding from the vehicle front side end portion of the inner column 12B via the universal joint 14, the vehicle body side upper bracket 21 and the vehicle body side lower bracket 22 are connected. It is attached to a vehicle body side member (not shown).

Thereafter, the universal joint 16 and the pinion shaft of the steering gear 17 are connected while the intermediate shaft 15 is contracted, whereby the attachment of the steering device 10 to the vehicle body is completed.
Thereafter, when the tilt adjustment of the steering device 10 is performed, the second cam member 45b is moved to the left side in the axial direction by operating the operation lever 43 of the clamp mechanism 40 to rotate the first cam member 45a to the unlocking position. And the tightening between the opposing side plates 21b and 21c of the vehicle body side upper bracket 21 is released. In this state, the steering column 12 can be rotated about the pivot shaft 23 of the vehicle body side lower bracket 22, so that adjustment to a desired tilt position can be performed. Similarly, when the tightening between the opposing side plates 21b and 21c of the vehicle body side upper bracket 21 is released, the inward tightening of the bulging portion 27b in the bracket facing portion 27 of the outer column 12A is released, thereby supporting The pressing state by the inner column 12B by the engagement support surfaces 31a and 32a of the pieces 31 and 32 is released, and the inner column 12B can slide in the axial direction with respect to the outer column 12A, and adjustment to a desired telescopic position is performed. be able to.

When the tilt position adjustment or telescopic position adjustment is completed, the second cam member 45b moves to the right in the axial direction as viewed in FIG. The bulging portion 27b of the outer column 12A is pinched between the opposing side plates 21b and 21c of the bracket 21 to enter a locked state.
At this time, the bulging portion 27b of the bracket facing portion 27 of the outer column 12A is pressed inward by the facing side plates 21b and 21c of the vehicle body side upper bracket 21, and there is a gap X1 between the bottom surface plate portions 27f and 27g. Since the gap X2 also exists between the pieces 31 and 32, the support pieces 31 and 32 are moved inward to sandwich the inner column 12B with the engagement support surfaces 31a and 32a, whereby the outer column 12A and the inner column 12B. The telescopic movement between the outer column 12A and the bulging portion 27b of the outer column 12A is securely held between the opposing side plates 21b and 21c of the vehicle body side upper bracket 21, so that the tilt movement of the outer column 12A is reliably prevented. The

  Thus, according to the above embodiment, the support pieces 31 and 32 are disposed symmetrically in the bulging portion 27b of the bracket facing portion 27 of the outer column 12A, and the engagement support surfaces 31a and 32a of the support pieces 31 and 32 are arranged. 32a and the inner peripheral surface of the semi-cylindrical portion 27a can support the inner column 12B at three points, and the inner column 12B can be securely held without any play in the outer column 12A, thereby increasing the rigidity. Can be planned.

In addition, engagement protrusions 27k extending in the width direction are formed on the bottom surface plate portions 27g and 27h of the bulging portion 27b of the outer column 12A, and engagement recesses 31f that engage with the engagement protrusions 27k are formed on the support pieces 31 and 32, respectively. Since 32f is formed, it can restrict | limit reliably that the support pieces 31 and 32 move to an axial direction with respect to the bulging part 27b.
Further, since the pair of support pieces 31 and 32 are arranged symmetrically, they can be formed in the same shape, and the cost can be reduced without increasing the number of parts.

In addition, by forming the support pieces 31 and 32 by injection molding a synthetic resin material, the weight can be reduced, and conversely, the support pieces 31 and 32 can be made of aluminum, aluminum alloy, magnesium, magnesium alloy, or the like. Rigidity can be improved by forming by die casting.
Thus, it is not necessary to machine the finished molded product by injection molding the synthetic resin material or die-casting aluminum, aluminum alloy, magnesium, magnesium alloy, etc. for the support pieces 31 and 32, Since it can be used as it is, the manufacturing cost and the number of manufacturing steps can be reduced.

  In the above-described embodiment, the engagement protrusions 27k are formed on the bottom plate portions 27g and 27h of the bulging portion 27b of the outer column 12A, and the engagement recesses 31f and 32f are formed on the support pieces 31 and 32 facing the protrusions 27k. However, the present invention is not limited to this, and an engagement recess is formed on the bottom plate portions 27g and 27g of the bulging portion 27b, and an engagement protrusion is formed on the support pieces 31 and 32. Also good.

In the above embodiment, the case where the circumferential slit 27m cut from the lower side is formed in the cylindrical portion 26 on the vehicle front side of the bracket facing portion 27 of the outer column 12A has been described, but this may be omitted. it can.
Furthermore, in the above-described embodiment, the case where the steering column 12 can be adjusted for both tilt position adjustment and telescopic position adjustment has been described. However, the present invention is not limited to this, and the opposing side plate 21b of the vehicle body side upper bracket 21 is not limited thereto. And the long hole 41 for tilt adjustment of 21c and 21c is changed into the round hole which penetrates the volt | bolt 42 for fastening, and it can also be set as the structure which enables only a telescopic position adjustment.

It is a perspective view which shows the state which mounted the steering device to which this invention is applied to the vehicle. It is a side view of a steering device. It is sectional drawing on the AA line of FIG. It is a disassembled perspective view of a steering column. It is the side view which made the cross section the part which shows the bracket opposing part of an outer column. It is sectional drawing on the BB line of FIG. It is a side view of a support piece.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Steering device, 11 ... Steering shaft, 12 ... Steering column, 12A ... Outer column, 12B ... Inner column, 13 ... Steering wheel, 14, 16 ... Universal joint, 15 ... Intermediate shaft, 17 ... Steering gear, 18 ... Tie rod 19 ... steering wheels, 21 ... vehicle body side upper bracket, 21a ... vehicle body mounting plate, 21b, 21c ... opposite side plate, 22 ... vehicle body side lower bracket, 23 ... pivot shaft, 26 ... cylindrical portion, 27 ... bracket facing portion, 27a ... semi-cylindrical part, 27b ... swollen part, 27c, 27d ... curved part, 27e, 27f ... opposing side plate part, 27g, 27h ... bottom plate part, 27i ... long hole for telescopic adjustment, 27k ... engaging projection, 31 , 32 ... support piece, 31a, 32a ... engagement support surface, 31b, 32b ... engagement side surface, 31 , 32c ... engage bottom, 31d, 32d ... inner surface, 31e, 32e ... telescopic adjustment long holes 40 ... clamping mechanism

Claims (5)

A position-adjustable steering device comprising: a steering column that rotatably supports a steering shaft, and has a telescopic inner column and an outer column; and a vehicle body side bracket that supports the steering column so that the position of the steering column can be adjusted.
The outer column is provided with a pair of left and right support pieces, each having an insertion hole for supporting the inner column and inserting a bolt for tightening, disposed inside the vehicle body side bracket. Steering device.   2. The position-adjustable steering apparatus according to claim 1, wherein the pair of support pieces includes an engaging portion that engages with an axial positioning portion formed on an inner peripheral surface of the outer column.   The outer column has a pair of a longitudinal cross-sectional shape facing the vehicle body side bracket, a semi-cylindrical portion, an opposing side plate portion connected to both ends of the semi-cylindrical portion, and an inward extending from a free end of the opposing side plate portion. Each of the pair of support pieces is engaged with and supported by a lower outer peripheral surface of an inner column inscribed in the semi-cylindrical portion; and An engagement side surface connected to the engagement support surface and engaged with the opposite side plate portion, an engagement bottom surface connected to the engagement side surface and engaged with the lower surface plate portion, the engagement bottom surface and the engagement An inner side surface connecting to the support surface, and the telescopic adjustment slot is formed between the engagement side surface and the inner side surface, and the inner side surfaces of the pair of support pieces are 3. The position adjustment type according to claim 1, wherein the position adjustment type is opposed to each other at a predetermined distance. Tearing device.   4. The position-adjustable steering apparatus according to claim 1, wherein the pair of support pieces is formed by injection molding a synthetic resin material. 5.   The position adjustment according to any one of claims 1 to 3, wherein the pair of support pieces are formed by die-casting a metal material such as aluminum, an aluminum alloy, magnesium, or a magnesium alloy. Steering device.

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