JP2013112109A - Mounting structure of steering lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a steering lock device capable of enhancing an antitheft function by preventing illicit removal of a bolt.SOLUTION: In this mounting structure of the steering lock device 1 fixed by holding a steering column between a device body 2 and a cover plate 3 fixed to the device body 2 by bot fastening, a bolt insertion hole 3b, a wall portion 3C erected toward a head 5B of a twisting-off bolt 5 from the bolt insertion hole 3b via a bent portion 3c and a curved portion 3d curved in a direction projecting the bent portion 3c to the device body 2 side between the bent portion 3c and the bolt insertion hole 3b are formed on the cover plate 3. The cover plate 3 is fastened to the device body 2 with the twisting-off bolt 5 to bring the bent portion 3c of the cover plate 3 into pressure contact with the device body 2, and the curved portion 3d is deformed to direct the wall portion 3C to the head 5B of the twisting-off bolt 5.

Description

  The present invention relates to a mounting structure of a steering lock device for locking rotation of a steering wheel when a vehicle is parked.

  The vehicle is provided with a steering lock device that locks the rotation of the steering wheel during parking for the purpose of preventing theft. This steering lock device includes a device body and a cover plate fixed to the device body by bolting. It is fixed by sandwiching the steering column between them.

  In order to prevent such removal of the steering lock device and enhance the anti-theft function, a threaded bolt is used for the bolt, the cover plate is fixed to the device body with the threaded bolt, and the steering lock device is attached. The steering lock device cannot be removed by turning the threaded bolt by breaking the head of the bolt.

  However, when the mounting structure described above is adopted, even if it is a threaded bolt with the head cut off, the mounting seat after the break is exposed. It is possible to turn the threaded bolt little by little by hitting with the tool of this, and there is a problem that the steering lock device is removed.

  Therefore, Patent Document 1 proposes a structure in which a peripheral wall that covers the periphery of the mounting seat portion of the threaded bolt after breaking is integrally formed on the cover plate. According to this, even if a tool such as a chisel hits and strikes around the mounting seat of the threaded bolt after breaking, the tool cannot hit the peripheral wall of the cover plate and turn the threaded bolt. Theft due to the locking device being removed from the steering column can be prevented.

Japanese Utility Model Publication No. 5-000460

  However, there are cases where the peripheral wall cannot be sufficiently formed on the cover plate due to space problems, or the steering lock device is set so that the mounting seat portion of the threaded bolt faces forward. In such a case, even if the mounting seat portion of the threaded bolt is covered by the peripheral wall of the cover plate, it is possible to hit the mounting seat portion with a tool or the like. There was a problem that it could be removed from.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a steering lock device mounting structure that can prevent unauthorized removal of bolts and enhance an anti-theft function.

In order to achieve the above object, the invention according to claim 1 is a mounting structure for a steering lock device fixed by sandwiching a steering column between a device body and a cover plate fixed to the device body by bolting. And
The cover plate includes a bolt insertion hole, a wall portion erected from the bolt insertion hole through the bent portion toward the head of the bolt, and the bent portion between the bent portion and the bolt insertion hole. Forming a bending portion that curves in a direction in which the portion protrudes toward the device body side,
By fastening the cover plate to the device body with the bolt, the bent portion of the cover plate is pressed against the device body so that the curved portion is deformed and the wall portion is directed to the head of the bolt. It is characterized by that.

  According to a second aspect of the present invention, in the first aspect of the present invention, the wall portion of the cover plate extends from the bent portion to the tip portion in a direction approaching the head of the bolt, and the cover plate is formed by the bolt. By being fastened to the device body, the tip of the wall is configured to engage with the head of the bolt.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the head portion of the bolt is constituted by a tightening portion and a mounting seat portion below the tightening portion, and between the tightening portion and the mounting seat portion. A screw cutting portion is formed, and after tightening the cover plate to the device body, the bolt tightening portion can be broken, and the cover plate is fastened to the device body by the bolt, thereby leading the tip of the wall portion. The portion is configured to be engaged with the mounting seat portion of the bolt.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the wall portion of the cover plate extends from the bent portion to the tip portion in a direction approaching the mounting seat portion of the bolt, and the cover plate is attached to the bolt. The front end portion of the wall portion is engaged with the mounting seat portion of the bolt by fastening to the apparatus body.

  According to the first aspect of the present invention, the bent portion of the cover plate comes into contact with the device body in the initial stage of fastening the cover plate to the device body with the bolt, and after that, the bolted portion of the cover plate is Since the curved portion is deformed as a fulcrum, the wall portion is inclined together with the bent portion so as to face the head of the bolt. And since the tip of the wall of the cover plate is engaged with the head of the bolt after the cover plate has been attached, unauthorized access to the head of the bolt is impossible, preventing the bolt from being removed. Thus, the anti-theft function of the steering lock device is enhanced.

  According to the second aspect of the present invention, since the wall portion of the cover plate extends in a direction approaching the head portion of the bolt even before the cover plate is fixed to the apparatus body, the head portion of the bolt is covered with the cover plate. The bolts are not caught inadvertently by being caught at the tip of the wall portion, and the cover plate mounting workability is improved. After the cover plate is fixed to the apparatus body, the wall portion of the cover plate is engaged with the head portion of the bolt, so that it is impossible to remove the wall portion illegally and turn the bolt.

  According to the third and fourth aspects of the present invention, when the bolt tightening portion is broken after the cover plate is fastened to the apparatus body, the tip of the wall portion of the cover plate is engaged with the mounting seat portion remaining on the bolt. Therefore, unauthorized access to the bolt is more reliably prevented, and the anti-theft function of the steering lock device is further enhanced.

It is a broken section showing the attachment structure of the steering lock device concerning the present invention. (A) is a perspective view which shows the state before a deformation | transformation of a cover board, (b) is a perspective view which shows the state after the deformation | transformation of the cover board. It is a fragmentary sectional view which shows the state of the attachment initial stage of the cover board of the steering lock apparatus which concerns on this invention. It is the A section enlarged detail drawing of FIG. It is a fragmentary sectional view which shows the state in the middle of attachment of the cover board of the steering lock apparatus which concerns on this invention. It is the B section enlarged detail drawing of FIG.

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

  FIG. 1 is a broken sectional view showing a mounting structure of a steering lock device according to the present invention, FIGS. 2A and 2B are perspective views showing states before and after deformation of a cover plate, and FIG. 3 is a cover of the steering lock device. FIG. 4 is an enlarged detail view of part A of FIG. 3, FIG. 5 is a partial cross-sectional view showing a state in the middle of attachment of the cover plate of the steering lock device, and FIG. FIG.

  A steering lock device 1 shown in FIG. 1 is a device fixed by sandwiching a steering column (not shown) between a device body 2 and a cover plate 3 fixed to the device body 2 by bolting. Is provided with a lock member 4 that appears and disappears by turning operation of a key cylinder (not shown). Specifically, when the driver turns an engine key (not shown) inserted into the key cylinder to turn off the engine and removes the engine key from the key cylinder, the lock member 4 is interlocked with the operation as shown in FIG. Projecting from the arcuate recess 2a of the device body 2 and fitting into the recess 10a of the steering shaft 10, locking the rotation of a steering wheel (not shown) attached to the upper end of the steering shaft 10, and Prevent theft. Although not shown, the steering shaft is rotatably inserted into the steering column, and its lower end is connected to a steering system such as a steering gear box, and when the steering wheel is rotated by the driver, It fulfills the function of transmitting rotation to the steering system.

  Further, as shown in FIG. 1, from the state in which the lock member 4 is fitted in the recess 10a of the steering shaft 10 and the rotation of the steering wheel is locked (steering locked state), the driver moves the engine key to the key cylinder (not shown). When the engine is started by inserting and turning this, the locking member 4 comes out of the recess 10a of the steering shaft 10 and is buried in the device body 2 in conjunction with this operation, so that the steering wheel is unlocked, The driver can rotate the steering wheel.

  By the way, as shown in FIG. 1, insertion holes 2b through which the lock member 4 is inserted so as to be movable up and down are formed in the center of the arc-shaped recess 2a of the apparatus body 2, and are formed on both sides of the arc-shaped recess 2a. The screw hole 2c is formed in the vertical direction. The upper surface of the device body 2 is covered with the arched cover plate 3, and the cover lock plate 3 is fastened to the device body 2 with two screw bolts 5, whereby the steering lock device 1 is attached to the device body. The steering column is fixed between the cover plate 3 and the cover plate 3.

  Here, as shown in FIG. 2, the cover plate 3 is integrally formed in an arch shape by press forming of a sheet metal, and an arcuate recess 3 a is formed at the center, and the arcuate recess 3 a and the circle of the apparatus body 2 are formed. A steering column (not shown) is held between the arcuate recess 2a. A circular bolt insertion hole 3b is formed in each of the flat portions 3A on both sides of the arc-shaped recess 3a of the cover plate 3, and the outer peripheral edge of the cover plate 3 is inclined obliquely to the vertical peripheral wall 3B. A rectangular plate-shaped wall 3C is erected. Specifically, a rectangular plate-like wall portion 3C is erected obliquely in the vicinity of one bolt insertion hole 3b formed on the front side of the cover plate 3 (left side in FIG. 1).

  Thus, although the initial state of attaching the cover plate 3 to the apparatus body 2 is shown in FIGS. 3 and 4, the threaded bolt 5 is passed from above through the bolt insertion hole 3b of the cover plate 3 before tightening. The screw portions 5A of these threading bolts 5 are screwed into the screw holes 2c of the apparatus body 2.

  Here, a bent portion 3c that is bent in a V shape is formed at the edge of the cover plate 3 on the side of one bolt insertion hole 3b, and the wall portion 3C extends from the bent portion 3c to the tip portion of the threaded bolt 5. It extends obliquely toward the direction approaching the head 5B. The cover plate 3 is formed with a curved portion 3d that curves in a direction in which the bent portion 3c protrudes toward the apparatus body 2 (downward) between the bent portion 3c and the bolt insertion hole 3b.

  Further, the head portion 5B of each threading bolt 5 is provided with a tightening portion 5a and a mounting seat portion 5b below the tightening portion 5b, and a cross-sectional area between these tightening portions 5a and the mounting seat portion 5b. A threaded portion 5c in which is narrowed is formed.

  Thus, when the cover plate 3 is attached to the device body 2, the bent portion 3 c abuts against the upper surface of the device body 2 when the cover plate 3 is placed on the upper surface of the device body 2 as shown in FIG. 3. The flat portion 3 </ b> A and the curved portion 3 d are in a position floating from the apparatus body 2, and a predetermined gap is formed between these and the upper surface of the apparatus body 2.

  From the above state, the threaded bolts 5 are passed through the bolt insertion holes 3b of the cover plate 3 from above, and the threaded portions 5A of these threaded bolts 5 are screwed into the threaded holes 2c of the apparatus body 2 as shown in FIG. From this state, when each screw bolt 5 is turned using a tool (not shown) such as a spanner or a wrench, and these screw bolts 5 are screwed into the screw holes 2c of the device body 2, the flat portion 3A of the cover plate 3 becomes the device. 4 is deformed toward the body 2 in the direction of arrow a in FIG. 4 (downward), and the gap with the apparatus body 2 becomes small as shown in FIGS. 5 and 6, and the apparatus body 2 of the bent portion 3 c of the cover plate 3 is formed. The abutting point P moves to the outside (in the direction of arrow b in FIG. 4). At this time, the curved portion 3d of the cover plate 3 rotates about the base end portion 3d1 in the direction of the arrow c (clockwise) in FIG. 4, so that the wall portion 3C also rotates in the same direction, and the distal end thereof is shown in FIG. It moves in the direction of the arrow d and approaches the head 5B of the threaded bolt 5, and a part of the mounting seat 5b of the threaded bolt 5 is covered by the tip of the wall 3C as shown in FIGS.

  Thereafter, when the threading bolt 5 is further tightened, as shown in FIG. 1, the flat portion 3A of the cover plate 3 is completely adhered to the upper surface of the apparatus body 2, and the tip of the wall portion 3C is attached to the threading bolt 5. It abuts on the upper part of the seat part 5b and covers this part. That is, as shown in FIG. 2A, the wall portion 3C of the cover plate 3 that is initially erected obliquely as shown in FIG. 2A rotates in the direction of the arrow when the threaded bolt 5 is tightened, as shown in FIG. As described above, the tip part engages with the upper part of the mounting seat part 5b of the threaded bolt 5 to cover this part.

  Thereafter, when the threaded bolt 5 is further turned and tightened, a large stress is generated in the threaded part 5c having the minimum cross-sectional area in the head 5B of each threaded bolt 5, and the tightening torque of each threaded bolt 5 is a predetermined value. When the above is reached, the threaded portion 5c is twisted off, the tightening portion 5a of each threaded bolt 5 is broken, and only the mounting seat 5b remains as shown in FIG. The top end of the wall portion 3C of the cover plate 3 is engaged with the upper portion of the mounting seat portion 5b and covers a part of the mounting seat portion 5b from above.

  As described above, according to the mounting structure of the steering lock device 1 according to the present invention, the bent portion 3c of the cover plate 3 is connected to the device body 2 at the initial stage when the cover plate 3 is fastened to the device body 2 with the screw bolt 5. When the threaded bolt 5 continues to be tightened, the curved part 3d is deformed with the bent part 3c of the cover plate 3 as a fulcrum, so that the wall part 3C and the head part 5B of the threaded bolt 5 together with the curved part 3d. Tilt to head towards. And since the front-end | tip part of the wall part 3C of the cover board 3 engages with the attachment seat part 5b of the torsion bolt 5 by which the fastening part 5a was cut off after the attachment of the cover board 3 was completed, this screw-off bolt Unauthorized access to the mounting seat portion 5b is prevented, the removal of the threaded bolt 5 is prevented, and the anti-theft function of the steering lock device 1 is enhanced.

  Even before the cover plate 3 is fixed to the apparatus body 2, the wall 3 </ b> C of the cover plate 3 extends in a direction approaching the head 5 </ b> B of the screw bolt 5. The portion 5B is caught on the tip of the wall portion 3C of the cover plate 3, and the threaded bolt 5 is not inadvertently dropped, so that the mounting workability of the cover plate 3 is improved. After the cover plate 3 is fixed to the apparatus body 2, the wall portion 3C of the cover plate 3 is engaged with the mounting seat portion 5b of the threaded bolt 5, so that the wall portion 3C is illegally peeled off and the threaded bolt is removed. It becomes impossible to turn 5.

  Further, when the cover plate 3 is fastened to the apparatus body 2 and the tightening portion 5a of the threaded bolt 5 is broken, the tip of the wall 3C of the cover plate 3 is attached to the mounting seat 5b remaining on the threaded bolt 5. Because of the engagement, unauthorized access to the threaded bolt 5 is more reliably prevented, and the anti-theft function of the steering lock device 1 is further enhanced.

  In the above embodiment, the wall portion 3C is provided only on the front side of the cover plate 3 (the side on which the possibility of unauthorized access to the threaded bolt 5 is high), but the wall portion is provided on both sides of the cover plate 3. Of course, 3C may be provided.

DESCRIPTION OF SYMBOLS 1 Steering lock apparatus 2 Apparatus body 2a Arc-shaped recessed part of apparatus body 2b Insertion hole of apparatus body 2c Screw hole of apparatus body 3 Cover plate 3A Flat part of cover plate 3B Cover plate peripheral wall 3C Cover plate wall 3a Cover plate Arc-shaped concave portion 3b Bolt insertion hole of cover plate 3c Bent portion of cover plate 3d Curved portion of cover plate 3d1 Base end portion of curved portion 4 Lock member 5 Threaded bolt 5A Threaded portion of threaded bolt 5B Head of threaded bolt 5a Screwed bolt tightening part 5b Screwed bolt mounting seat 5c Screwed bolt screwed part 10 Steering shaft 10a Steering shaft concave part

Claims (4)

A steering lock device mounting structure fixed by sandwiching a steering column between a device body and a cover plate fixed by bolting to the device body,
The cover plate includes a bolt insertion hole, a wall portion erected from the bolt insertion hole through the bent portion toward the head of the bolt, and the bent portion between the bent portion and the bolt insertion hole. Forming a bending portion that curves in a direction in which the portion protrudes toward the device body side,
By fastening the cover plate to the device body with the bolt, the bent portion of the cover plate is pressed against the device body so that the curved portion is deformed and the wall portion is directed to the head of the bolt. A mounting structure for a steering lock device, characterized in that   The wall portion of the cover plate extends from the bent portion to the tip portion in a direction approaching the head of the bolt, and the cover plate is fastened to the device body by the bolt, whereby the tip portion of the wall portion The steering lock device mounting structure according to claim 1, wherein: is configured to engage with a head portion of the bolt.   After the bolt head is composed of a tightening portion and a mounting seat portion below the tightening portion, a threaded portion is formed between the tightening portion and the mounting seat portion, and the cover plate is fastened to the device body The tightening portion of the bolt is foldable, and the cover plate is fastened to the device body by the bolt so that the front end portion of the wall portion is engaged with the mounting seat portion of the bolt. The mounting structure of the steering lock device according to claim 1 or 2. The wall portion of the cover plate extends from the bent portion to the tip portion in a direction approaching the bolt mounting seat portion, and the cover plate is fastened to the device body by the bolt, whereby the tip portion of the wall portion is The steering lock device mounting structure according to claim 3, wherein the mounting structure is configured to engage with a mounting seat portion of the bolt.

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