JP2017185857A - Steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering device which regulates upward movement of a steering column during a secondary collision, further strengthens a fastening state and makes tilt adjustment smoother when the fastening state is released, and reliably performs energy absorption.SOLUTION: A steering device comprises: a fixed bracket A having fixed side parts 1, in which tilt long holes 11 are formed, on both sides in a width direction; an outer column; a fastening tool B having a fastening cam 6 consisting of a driving cam 61 and a driven cam 62 which approach and separate from each other in an axial direction; and a stopper plate 4 comprising a leaf spring main plate part 41 having an arcuate cross section, a locking claw piece, and a fixing hole 43 for fixing the driven cam 62 in a non-rotatable manner. A locked part 3 consisting of a plurality of locked grooves 31 is formed in the vicinity of the tilt long hole 11 of one fixed side part 1. The driven cam part 62 is fixed to the stopper plate 4 in a non-rotatable manner. The locking claw piece of the stopper plate 4 is locked to the locked groove 31 by fastening of the fastening tool.SELECTED DRAWING: Figure 1

Description

  The present invention restricts the steering column from moving upward particularly during a secondary collision, can further tighten the tightening state, and can smoothly operate in the tilt adjustment when the tightening is released, The present invention relates to a steering device that can perform reliable energy absorption.

  2. Description of the Related Art Conventionally, in a secondary collision, there is a steering device provided with a mechanism that stably displaces a movable bracket and a column without moving upward even when a collision load acts on the steering wheel. Patent Document 1 exists as this type of steering device. Hereinafter, Patent Document 1 will be outlined. About the outline | summary of patent document 1, the code | symbol uses the code | symbol of patent document 1 as it is, and attaches it with a parenthesis.

In Patent Document 1 (Hira 9-254729), a movable bracket (5) for supporting a steering shaft (1) is slidably fitted in a fixed bracket (2) fixed to a vehicle body so as to be slidable in the vertical direction and fixed. Fastening bolts (6) are provided through the bracket (2) and the movable bracket (5).
In addition, a long hole (8) for moving the tightening bolt (6) in the vertical direction is formed in the left and right side walls of the fixing bracket (2).

The fastening bolt (6) has an anti-rotation part (6a) that fits into the long hole (8) at one end, and a spring (15) is mounted on the other end that penetrates the long hole (8), and is screwed. A collar (11), a tilt lever (4), and a lock nut (17) are fitted into the part (6b). The lock collar (11) is formed with a rotation stop portion (12) and a ratchet tooth portion (13) fitted in the long hole (8) on the pressure contact surface with the fixing bracket (2), and on the back surface thereof. One way cam (14) is integrally formed or worn.

On the side wall of the fixing bracket, ratchet teeth (10) are formed on both sides in the longitudinal direction of the long hole (8),
The ratchet teeth (10, 13) are configured to be meshable. A meshing guide member (22) which engages with a ratchet tooth portion (10b) of the ratchet tooth portion (10) of the fixing bracket (2) in parallel with the ratchet tooth portion (13) of the lock collar (11). ) Is elastically supported.

The meshing guide member (22) is elastically supported and fixed by a spring (23) so as to be in sliding contact with the inclined portion (13c) at a position protruding from the peak portion (13a) of the ratchet tooth portion (13). When the ratchet teeth (10, 13) are engaged with each other, the ratchet teeth (13, 13) are configured to come into contact before the ratchet teeth (13).

  Therefore, when the ratchet teeth (10, 13) mesh with each other, the engagement guide member (22) is first moved into the ratchet teeth in the state where the peaks (10a, 13a) of the ratchet teeth (10, 13) face each other. It fits into the valley (10b) of (10). Thus, the tooth surface of the valley (10b) adjacent to the valley (10b) with which the meshing guide member (22) is fitted coincides with the tangent of the meshing guide member (22), and the ratchet teeth that oppose at the time of meshing Each tooth surface of (10, 13) is in a straight line.

  When the ratchet teeth (10, 13) are further brought closer from this state, the inclined portion (13c) slides on the meshing guide member (22) and moves obliquely. 10a, 13a) mesh without colliding with each other. When both ratchet teeth (10, 13) mesh, the meshing guide member (22) fits into the valley of the other ratchet teeth (10, 13) and the ratchet teeth (10, 13) By preventing the contact between the peaks, half-locking is prevented and reliable tilt locking is performed.

Japanese Patent Laid-Open No. 9-254792

  The conventional technique as shown in Patent Document 1 has the following problems. First, in order to establish a tilt lock, it is necessary to add a member having a ratchet tooth portion, a spring, and a meshing guide member, which may lead to an increase in the number of parts and an increase in assembly man-hours. Further, at the time of tilt adjustment, the spring moves up and down in a direction crossing the compression direction, and the feeling at the time of tilt adjustment may be deteriorated.

  Accordingly, an object of the present invention is to realize a sufficiently strong tightening with a normal tightening torque with an extremely simple structure, to prevent the column from moving upward in a secondary collision, and to smoothly An object of the present invention is to provide a steering column having a tilt lock function that can absorb energy efficiently.

  In view of the above, the inventor has intensively and researched to solve the above-described problems. As a result, the inventor of the invention of claim 1 has a fixing bracket having a fixed side portion formed with a tilt long hole on both sides in the width direction, and both the fixed portions. An outer column disposed between the side portions, a fastening tool having a fastening cam composed of a main cam and a driven cam that are axially moved close to each other by rotating with each other, and a leaf spring main plate portion having an arcuate cross section And a stopper plate having a locking claw piece and a fixing hole for fixing the driven cam so as not to rotate, and a plurality of locking grooves are provided in the vicinity of the tilt long hole on one of the fixed side portions. A structured latched portion is formed, the driven cam portion is fixed to the stopper plate in a non-rotatable manner, and the locking claw piece of the stopper plate is locked by the tightening of the fastener. Steering as a structure that locks into the groove By was grayed apparatus to solve the above problems.

  According to a second aspect of the present invention, in the steering apparatus according to the first aspect, the locked portion is formed near an upper portion of the tilt long hole, and the locking claw piece of the stopper plate is the leaf spring main plate. The above-described problems have been solved by providing a steering device formed above the portion.

  According to a third aspect of the present invention, in the steering apparatus according to the first or second aspect, the locked groove of the locked portion is arranged separately on both sides in the front-rear direction with respect to the position of the tilt long hole. And the said subject was solved by setting it as the steering device by which the two said latching claw pieces of the said stopper plate were formed above the said leaf | plate spring main board part.

  According to a fourth aspect of the present invention, in the steering apparatus according to any one of the first, second, and third aspects, the locked groove of the locked portion has an umbrella shape with the tilt long hole as a boundary. The above-described problem has been solved by providing the steering device. According to a fifth aspect of the present invention, in the steering apparatus according to any one of the first, second, and third aspects, the locked groove of the locked portion is horizontal with the tilt long hole as a boundary. The above-described problem has been solved by providing the steering device.

  According to the first aspect of the present invention, the fastening includes a fixed bracket having fixed side portions formed with tilted elongated holes on both sides in the width direction, and a main driving cam and a driven cam that are moved closer to each other in the axial direction by rotating relative to each other. A clamp plate having a cam, a plate spring main plate portion having an arcuate cross section, a locking claw piece, and a stopper plate having a fixing hole for fixing the driven cam in a non-rotatable manner; A locked portion made up of a plurality of locked grooves is formed in the vicinity of the tilt elongated hole of the portion, and the driven cam portion is fixed to the stopper plate in a non-rotatable manner. When the locking bracket and the outer column are tightened (locked) via the tightening tool after the tilt adjustment is completed, the locking claw piece of the stopper plate is locked in the locked groove. And a stopper By locking the locking claw piece of the seat with the locked groove on the fixed side, it is possible to restrict the outer column from moving upward due to the impact at the time of a secondary collision, and smooth energy absorption becomes possible. .

  When the tightening (locking) is released, the main cam and the driven cam of the tightening cam are close to each other, and the arc-shaped stopper plate having the warp is released from the tightening load from the driven cam and the fixed side portion, The stopper plate changes from a flat shape to an arc shape, and the locking claw piece is removed from the locked groove, and the stopper plate can be moved in the vertical direction, so that the tilt adjustment is performed smoothly.

  According to a second aspect of the present invention, the locked portion is formed near the upper portion of the tilt elongated hole, and the locking claw piece of the stopper plate is formed above the leaf spring main plate portion. Further, it is possible to more firmly regulate the upward movement of the steering column at the time of the secondary collision.

  In the steering device according to claim 3 or 2, the locked groove of the locked portion is arranged separately on both sides in the front-rear direction with respect to the position of the tilt long hole, Since the two engaging claw pieces of the stopper plate are formed above the leaf spring main plate portion, it is possible to more firmly restrict the upward movement. In the invention of claim 4 and claim 5, the locking groove of the locked portion is configured to be umbrella-shaped or horizontal with the tilt long hole as a boundary, so that the stopper plate is fixed to the fixed side portion. Can be fixed extremely firmly.

(A) is a side view of a steering apparatus provided with the present invention, (B) is an enlarged view of (α) part of (A), (C) is an enlarged sectional view taken along arrow Y1-Y1 of (A), (D). FIG. 4 is an enlarged view of a (β) portion of (C). (A) is a perspective view showing an assembly structure of a fixing bracket, a stopper plate, and a fastening cam, (B) is an exploded perspective view of the fixing bracket, a stopper plate, and a fastening cam, and (C) is an engaged state in the fixing bracket. Side view of fixed side portion in which groove is formed, (D) is an enlarged cross-sectional view taken along arrow Y2-Y2 of (C), and (E) is an enlarged cross-sectional view of another embodiment taken along arrow Y2-Y2 of (C). FIG. 4F is a side view of the fixed side portion of the fixed bracket showing an embodiment of another structure of the locked portion. (A) is an enlarged cross-sectional view of a main part in a state where the tightening (locking) of the fastener is released in the present invention, and (B) is a main part of the state in which the fastener is tightened (locked) in the present invention (C) is a side view of the fixing bracket in a state in which the locking claw piece of the stopper plate is locked in the locking groove on the upper side of the locking portion on the fixed side. FIG. 5 is a side view of the fixing bracket in a state in which a locking claw piece of a stopper plate is locked in a locked groove on a lower side of a locked portion of the fixed side portion. (A) is a side view of the stopper plate, (B) is a view taken along the arrow Y3-Y3, (C) is a perspective view of the stopper plate, and (D) is a side view of the stopper plate of another embodiment. (A) is a perspective view seen from the cam protruding portion side of the main driving cam (driven cam), (B) is a plan view seen from the cam protruding portion side of the main driving cam (driven cam), and (C) is the main driving cam (driven). It is the perspective view seen from the fixed projection side of the cam.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present invention, there are a front side and a rear side as words indicating directions. The front side and the rear side are based on the longitudinal direction of the automobile with the steering device of the present invention mounted on the automobile. Specifically, in each component of the steering device, the front wheel side of the automobile is the front side, and the steering wheel (handle) side is the rear side. The width direction is a direction perpendicular to the front-rear direction in a horizontal direction. The up-down direction is a direction perpendicular to the front-rear direction and perpendicular to the vertical direction. Words indicating the above directions are described in some drawings.

  First, as shown in FIG. 1, the main configuration of the present invention is a configuration mainly including a fixing bracket A, a stopper plate 4, a fastening tool B, and an outer column 7. First, the fixed bracket A is composed of a fixed side portion 1 facing in the width direction, a connecting plate 13 and a mounting plate portion 12. Both the fixed side portions 1 are symmetrical and have the same shape, are formed in a substantially plate shape, and are arranged in parallel in the width direction. And the upper part of both the fixed side parts 1 is connected by the connection part 13.

  At the upper ends of both fixed side portions 1, mounting plate portions 12, 12 that extend horizontally on the outer side in the width direction of the fixed bracket A are formed. The both mounting plate portions 12 and 12 are attached to a predetermined position of the vehicle body via bolts or the like. Tilt long holes 11 and 11 are formed in the fixed side portions 1 and 1, respectively (see FIGS. 2B and 2C).

  On the fixed side portion 1 on one side of the fixed bracket A, a locked portion 3 is formed around the tilt long hole 11. In the tilt adjustment, the locked portion 3 is locked with a locking portion 42 of a stopper plate 4 to be described later, thereby tightening bolts of a clamping tool B to be described later at 11 positions of the tilt long holes of the fixed side portion 11. It serves to fix the positions of 51 and the outer column 7.

  The locked portion 3 is composed of a plurality of locked grooves 31, 31,... (See FIGS. 2B, 2C, etc.). The locked groove 31 is formed in a linear or streak shape on the fixed side portion 1 and is formed as a slit penetrating the fixed side portion 1 (see FIG. 2D). Alternatively, it may be formed as a linear or streak-shaped concave groove with respect to the fixed side portion 1 (see FIG. 2E).

  In the fixed side portion 1, a plurality of locked grooves 31, 31,... Are formed in a row in the vertical direction in the vicinity of both sides in the front-rear direction with the tilt long hole 11 as a boundary. [Refer to FIG. 2 (C), (F)]. .. Are formed in the fixed side portion 1 so as to sandwich the tilt elongated hole 11 in the front-rear direction. [Refer to Drawing 2 (C) and (F)].

  The row of two locked grooves 31, 31,... Formed in the vicinity of both sides in the front-rear direction of the tilt elongated hole 11 has a virtual line along the vertical direction of the tilt elongated hole 11 as a central symmetry line L, It is formed in a substantially symmetrical state with respect to the central symmetry line L (see FIGS. 2C and 2F). That is, the number of the locking grooves 31, 31,... Provided in the vertical direction on the front side in the front-rear direction of the tilt long hole 11, and the vertical line provided on the rear side of the tilt long hole 11. The number of the engaged grooves 31, 31,... Is the same. And the row | line | column of the to-be-latched groove | channels 31, 31, ... located in the front side of the tilt long hole 11 is called the front groove | channel row | line 3f. Moreover, the row | line | column of the to-be-latched groove | channels 31, 31, ... located in the back side of the tilt long hole 11 is called the back groove row | line | column 3r.

  The tilt long hole 11 is a long hole corresponding to a swing locus when the outer column 7 is tilted. Specifically, the longitudinal direction of the tilt long hole 11 is along an arc having a radius R drawn with the tilt pivot portion 73 serving as a tilt swing center as the center O [FIGS. )reference〕. Further, it is preferable that the tilt long hole 11 is formed in an inclined shape and an arc shape so that the upper portion is on the rear side and the lower portion is on the front side.

  The central symmetry line L is a virtual line, and is indicated by a one-dot chain line in the drawing. Further, as described above, the center symmetric line L is generally an arc-shaped line drawn with the tilt pivot portion 73 serving as the tilt swing center as the center O. Corresponding to the center symmetry line L of the tilt elongated hole 11, the center lines in the arrangement of the locked grooves 31, 31,... Of the front groove row 3f and the rear groove row 3r also coincide with the center symmetry line L ( It is preferably set as an arcuate or substantially straight line along the central symmetry line L (see FIGS. 2C and 2F).

  The locked grooves 31 and 31 of the front groove row 3f of the tilt long hole 11 and the rear groove row 3r of the tilt long hole 11 have a substantially umbrella shape or an arrow feather shape around the tilt long hole 11, respectively. Inclined (see FIGS. 2B, 2C, etc.). The inclination of the locked groove 31 of the front groove row 3 f and the locked groove 31 of the rear groove row 3 r is an angle that is bilaterally symmetric about the center symmetry line L of the tilt elongated hole 11.

  Further, the locked grooves 31, 31,... Of the front groove row 3 f and the rear groove row 3 r may be substantially perpendicular to the central symmetry line L with respect to the tilt long hole 11 [FIG. See F)]. That is, the locked groove 31 of the front groove row 3f and the locked groove 31 of the rear groove row 3r are substantially horizontal with respect to the central symmetry line L.

  Further, the locked grooves 31, 31,... Of the front groove row 3 f and the rear groove row 3 r with respect to the tilt elongated hole 11 have a substantially inverted umbrella shape or a substantially inverted arrow feather shape with respect to the center symmetry line L. Sometimes. Both the front groove row 3 f and the rear groove row 3 r of the locked portion 3 are formed so as to protrude above the upper end of the tilt long hole 11 from the middle position in the vertical direction of the tilt long hole 11.

  Next, the stopper plate 4 is configured to be sandwiched between the outer surface side of the fixed side portion 1 of the fixed bracket A and a tightening cam described later. The stopper plate 4 has a leaf spring main plate portion 41, a locking portion 42, and a fixing hole 43. The leaf spring main plate portion 41 has a substantially arc-shaped warp along the vertical direction, and more specifically, has a bow shape (see FIG. 4).

  The leaf spring main plate portion 41 has an elastic bent portion 41a over the middle in the vertical direction or over the whole. The elastic bent portion 41 a serves to add an arc-shaped warp to the leaf spring main plate portion 41. The leaf spring main plate portion 41 is formed in a substantially bow (arc) shape in cross section with the elastic bent portion 41a as the center (see FIG. 4B). The leaf spring main plate portion 41 has a property as a leaf spring by the elastic bent portion 41a, and even if it receives a load from a direction orthogonal to the surface and becomes flat, when the load is removed, the original arc shape is obtained. It has an elastic restoring force.

  A fixed hole 43 is formed in the leaf spring main plate portion 41. In the leaf spring main plate portion 4, the surface on the fixed side portion that is convex due to warping is referred to as a convex surface 41k. A surface opposite to the convex surface 41k is referred to as a concave surface 41t. The fixing hole 43 is inserted with a fixing projection 62d of a driven cam 62 of the tightening cam 6 described later, and serves to fix the driven cam 62 to the stopper plate 4 so as not to be rotatable (FIG. 3). reference). The shape of the fixing hole 43 is formed corresponding to the shape of the fixing protrusion 62 d of the driven cam 62. Specifically, when the shape of the fixing protrusion 62d of the driven cam 62 is a substantially elliptical shape or an oval shape, the fixing hole 43 is a long hole having a substantially equivalent shape.

  A locking portion 42 is formed above the leaf spring main plate portion 41. The locking portion 42 has two locking claw pieces 42a and 42a and two arm-shaped pieces 42b and 42b. Both the arm-shaped pieces 42b, 42b are formed from the upper end of the leaf spring main plate portion 41 so as to be substantially V-shaped.

  Both the locking claw pieces 42a and 42a are formed at the tips of both arm-like pieces 42b and 42b, respectively. The locking claw piece 42a is a part where the tip of the arm-shaped piece 42b is bent in an arc shape from the concave surface 41t of the leaf spring main plate portion 41 toward the convex surface 41k. Furthermore, the tip of the locking claw piece 42a is formed so as to protrude toward the convex surface 41k with respect to the arm-like piece 42b.

  The stopper plate 4 and the driven cam 62 are configured such that the leaf spring main plate portion 41 and the locking portion 42 are connected to the driven cam 62 in a state where the fixing projection 62d of the driven cam 62 is inserted into the fixing hole 43 of the stopper plate 4. Both sizes are set so as to be covered by the rotation base 62a.

  At the time of tightening after completion of the tilt adjustment, the leaf spring main plate portion 41 and the locking portion 42 of the stopper plate 4 are pressed so as to be pressed against the fixed side portion 1 of the fixed bracket A by the rotation base portion 62a of the driven cam 62. Is done. At this time, when both arm-shaped pieces 42b and 42b are pressed by the driven cam 62, the both engaging claw pieces 42a and 42a are appropriately locked grooves 31 and 31 of the front groove row 3f and the rear groove row 3r. It is surely locked.

  Next, the fastening tool B includes a fastening bolt 51, an operation lever 52, and a fastening cam 6. The tightening bolt 51 passes through the tilted long holes 11 and 11 of both the fixed side portions 1 of the fixed bracket A, the fixed hole 43 of the stopper plate 4, the tightening cam 6, and the like. Then, by rotating the operation lever portion 62, the fixing bracket A and the outer column are locked after the tilt adjustment via the tightening cam 6.

  The clamping cam 6 has a main driving cam 61 and a driven cam 62 [see FIG. 2 (B)]. The main drive cam 61 is formed of a disc-shaped rotation base 61a and a cam protrusion 61b. In addition, a shaft support hole 61c through which the tightening bolt 51 passes is formed at the center of the rotation base 61a. The tightening bolt 51 is inserted into the shaft support hole 61c. A fixed projection 61d is formed on the back surface side of the fixed base 61a of the main cam 61 (see FIG. 3C). The fixing protrusion 61d is a bulged portion having a rectangular shape such as an ellipse, an ellipse, or a rectangle. The fixing protrusion 61d is inserted into a fixing hole 52a formed in the rotation base of the operation lever 52, and the main driving cam 61 rotates clockwise or counterclockwise together with the operation lever 52.

  The driven cam 62 has substantially the same configuration as that of the main drive cam 61, and a driven cam protruding portion 62b is formed in a disk-like fixed base portion 62a. A shaft support hole 62c through which the tightening bolt 51 passes is formed at the center of the fixed base 62a. The shaft support hole 62c preferably has a diameter that allows the tightening bolt 51 to be inserted with a margin. FIG. 5 is a diagram in which both the main driving cam 61 and the driven cam 62 are used together.

  The driven cam protrusion 62b of the driven cam 62 swells from the surface of the fixed base 62a so as to be radially spaced from the center of the fixed base 62a and equally spaced in the circumferential direction, as in the case of the main drive cam 61. A plurality are formed (see FIGS. 5A and 5B). The main driving cam 61 and the driven cam 62 are rotated relative to each other, so that the main driving cam protruding portion 61b and the driven cam protruding portion 62b are joined to each other. Separation can be performed (see FIGS. 3A and 3B). By such proximity and separation of the main driving cam 61 and the driven cam 62, the fixing bracket A and the outer column can be clamped and released by the clamp B.

  A fixed projection 62d is formed on the back surface side of the fixed base 62a of the driven cam 62 (see FIG. 3C). The fixing protrusion 62d is an elliptical bulging portion, and the fixing protrusion 62d has substantially the same shape as the fixing hole 43 of the stopper plate 4 and can be inserted into the fixing hole 43. It is formed slightly smaller than.

  As described above, the driven cam 62 is configured such that the driven cam 62 cannot rotate with respect to the stopper plate 4 by inserting the fixing protrusion 62 d into the fixing hole 43 of the stopper plate 4. The stopper plate 4 is fixed to the fixed side portion 1 when the stopper plate 4 is clamped (locked) to the fixed side portion 1 of the fixing bracket A by the fastening tool B as will be described later. Therefore, the driven cam 62 is also fixed to the fixed side portion 1.

  Here, the effective inter-axis distance dimension of the tilted long hole 11 of the fixed bracket A is Sa. Further, the interval dimension between the uppermost locked groove 31 and the lowermost locked groove 31 of each row constituting the front groove row 3f and the rear groove row 3r in the locked portion 3 is Sb. To do. The spacing dimension Sb is set smaller than the effective inter-axis distance dimension Sa (see FIG. 2C).

となる。 That means

It becomes.

  The effective inter-axis distance dimension Sa is a distance that allows the fixed projection 62d of the driven cam 62 to move together with the tightening bolt 51 in the tilt elongated hole 11. That is, the shaft support hole 62c of the fixing protrusion 62d that supports the tightening bolt 51 of the tightening tool B has a movable distance.

  An object of the present invention is to prevent the outer column 7 from being displaced upward during a secondary collision. This is because the locking claw piece 42a of the stopper plate 4 is locked in the locked groove 31 of the locked portion 3 during the secondary collision, and the driven cam 62 and the fastening bolt 51 are moved along the tilted long hole 11. Achieved by becoming impossible. Therefore, in the tilt adjustment, the locking claw piece 42 a is locked to the locked groove 31 except when it is set at the top of the tilt.

  However, when the tilt adjustment is set at the top of the tilt, the fixed projection 62 d of the driven cam 62 is in contact with the upper end of the tilt long hole 11, and the driven cam 62 and the tightening bolt 51 are in contact with the tilt long hole 11. Cannot move any further along. Therefore, the locking claw piece 42 a of the stopper plate 4 does not need to be locked in the locked groove 31 at the uppermost position of the locked portion 3.

  Therefore, the effective inter-axis distance dimension Sa of the tilt elongated hole 11 and the interval dimension Sb between the uppermost locked groove 31 and the lowermost locked groove 31 are different, and the interval dimension Sb is the effective inter-axis distance dimension. It is set smaller than Sa. Further, the locked groove 31 at the uppermost position of each of the front groove row 3f and the rear groove row 3r is located from the position of the locking claw piece 42a of the stopper plate 4 when it is positioned at the uppermost position with respect to the tilt long hole 11. Is also in a low position.

  In the outer column 7, fastening portions 72, 72 are integrally formed at a lower portion of the holding and fixing portion 71. Both tightening portions 72 and 72 have a symmetrical shape, and are formed with tightening through holes 72a and 72a. The holding pipe 71 holds the column pipe 8 (see FIGS. 1A and 1B).

  In the steering device of the present invention, the outer column 7 is disposed on both the fixed side portions 1 of the fixed bracket A. The column pipe 8 is held by the holding / fixing portion 71 of the outer column 7 as described above. A stopper plate 4 is disposed on one of the fixed side portions 1 and on the fixed side portion 1 where the locked portion 3 is provided. At this time, the stopper plate 4 is disposed so that the convex surface 41k faces the fixed side portion 1 side [see FIG. 2 (B)]. The convex surface 41k is a portion that becomes a surface of the fixed side portion that is convex due to warpage in the leaf spring main plate portion 41.

  Then, the fastening bolt 51 passes through the fixing bracket A, the outer column 7, the stopper plate 4, the fastening cam 6, and the operation lever 52, and the fastening bolt 51 is fixed to the main drive cam 61 and the operation lever 52 of the fastening cam 6. Is done. The operation lever portion 52 is fixed to the main drive cam 61, and the main drive cam 61 rotates clockwise or counterclockwise as the operation lever portion 52 is operated.

  When the main driving cam 61 and the driven cam 62 of the tightening cam 6 are close to each other, the stopper plate 4 positioned between the driven cam 62 and the fixed side portion 1 of the fixing bracket A is not subjected to a load or received. The stopper plate 4 has an arc shape with a warp.

  At this time, the locking claw piece 42 a of the locking portion 42 of the stopper plate 4 is disengaged from the locked groove 31 of the fixed side portion 1 and the locking portion 42 of the stopper plate 4 and the fixed side portion 1. The locked portion 3 is not locked at all [see FIG. 3 (A)]. Thereby, at the time of tilt adjustment, the stopper plate 4 can move up and down together with the fastening bolt 51 of the fastening tool B, and the tilt adjustment of the outer column 7 can be performed.

  When the position of the outer column 7 is determined by tilt adjustment, the operation lever 52 is operated to rotate the main driving cam 61 and to separate the main driving cam 61 and the driven cam 62 along the axial direction of the bolt shaft 51. . Accordingly, the stopper plate 4 positioned between the driven cam 62 and the fixed side portion 1 receives a load when the driven cam 62 and the fixed side portion 1 approach each other, and the stopper plate 4 is changed from an arc shape to a flat shape. Deform.

  As a result of this deformation, the locking claw piece 42a of the locking portion 42 of the stopper plate 4 is locked to the locked groove 31 at the closest distance, and the locking portion 42 of the stopper plate 4 and the fixed side portion Thus, the stopper plate 4 is firmly fixed to the fixed side portion 1 (see FIG. 3B).

  Next, as a second embodiment of the present invention, although not particularly illustrated, in the fixed side portion 1 of the fixing bracket A, the locked portion 3 is only a plurality of locked grooves 31, 31,. .. In the second embodiment are formed on the central symmetry line L of the tilted elongated hole 11. Further, only one arm-like piece 42 b and one locking claw piece 42 a of the locking portion 42 of the stopper plate 4 are formed above the leaf spring main plate portion 41.

  Further, in the third embodiment of the present invention, although not particularly illustrated, the position of the locked portion 3 is formed below the intermediate position in the vertical direction of the tilt long hole 11 formed in the fixed side portion 11 of the fixing bracket A. Sometimes it is done. In this embodiment, the stopper plate 4 is used so as to be opposite in the vertical direction so that the locking portion 42 is upward and the leaf spring main plate portion 41 is upward.

A ... fixed bracket, 1 ... fixed side part, 11 ... tilt long hole, 3 ... locked part,
31: Locked groove, 4: Stopper plate, 41: Plate spring main plate portion, 42a: Locking claw piece,
43 ... fixing hole, B ... clamp, 6 ... clamping cam, 61 ... primary cam, 62 ... following cam,
7 ... Outer column.

Claims (5)

  A fixed bracket having a fixed side portion formed with a tilt elongated hole on both sides in the width direction, an outer column disposed between the fixed side portions, and a main drive cam that moves closer to and away from each other in the axial direction by rotating together. A fastening tool having a fastening cam composed of a driven cam, a stopper plate having a leaf spring main plate portion having an arcuate cross section, a locking claw piece, and a fixing hole for fixing the driven cam non-rotatably. A locking portion composed of a plurality of locking grooves is formed in the vicinity of the tilt elongated hole on one of the fixed side portions, and the driven cam portion is fixed to the stopper plate so as not to rotate. The steering device is characterized in that the locking claw piece of the stopper plate is locked in the locked groove by tightening of the tightening tool.   2. The steering device according to claim 1, wherein the locked portion is formed near an upper portion of the tilt elongated hole, and the locking claw piece of the stopper plate is formed above the leaf spring main plate portion. A steering apparatus characterized by comprising:   3. The steering device according to claim 1, wherein the locked groove of the locked portion is arranged separately on both sides in the front-rear direction with respect to the position of the tilt elongated hole, and the stopper plate Two locking claws are formed above the leaf spring main plate portion.   4. The steering device according to claim 1, wherein the locked groove of the locked portion is arranged in an umbrella shape with the tilt long hole as a boundary. 5. Steering device.   4. The steering device according to claim 1, wherein the locked groove of the locked portion is arranged horizontally with the tilt long hole as a boundary. 5. Steering device.

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