JP5528893B2 - Steering lock device and cover member mounting structure - Google Patents

Description

  The present invention relates to a steering lock device and a cover member mounting structure.

  Conventionally, in order to prevent theft of a vehicle, a steering lock device is known that regulates the rotation of the steering when the steering is rotated in a state where an ignition key is not inserted into a key cylinder. And the proposal regarding the structure for preventing the action which destroys a steering lock apparatus and cancels | releases a steering lock state is made | formed (for example, refer patent document 1).

  In the steering lock device described in Patent Document 1, when a breaking operation is performed on the housing cover of the steering lock device, the holding member for holding the lock bolt that engages with the steering shaft in the unlock position is dropped. The lock bolt is configured to move to the lock position.

JP 2009-248843 A

  However, in this steering lock device, even if a regular user is used, the vehicle cannot be used when the destruction work is performed and the steering is locked. In other words, if the hold member falls off and the lock bolt moves to the lock position after the destruction work is performed, the steering lock state is not released even if the ignition key is inserted into the key cylinder, so that the vehicle can be used. You will have to repair it. Therefore, there has been a demand for a structure that can prevent the destruction work on the steering lock mechanism.

  Accordingly, an object of the present invention is to provide a steering lock device and a cover member mounting structure that make it difficult to remove the cover member.

[1] In order to achieve the above object, the present invention provides a case member having an opening, a steering lock mechanism housed in the case member and capable of regulating rotation of a steering shaft of a vehicle, and the case A metal plate-like cover member that covers at least a part of the opening of the member, a first region having a screw portion that is screwed to the cover member, and a second that is screwed or engaged with the case member A screw member including a region of the screw member, and the cover member has a through hole into which the screw portion of the first region of the screw member is screwed, and the screw member penetrates from the outside of the cover member. Provided is a steering lock device in which a cylindrical portion inserted into a hole is formed to protrude toward the case member by burring .

[2] The steering lock device according to [1] , wherein the cover member is further formed with a bent portion in which an end portion of the cover member is bent toward the case member .

[3] The steering lock device according to [1] or [2], wherein the screw member is a tapping screw that forms a female screw in a hole formed in the case member and a hole formed in the cover member. There may be.

[4] The steering lock device according to [1] or [2], wherein the screw member has a columnar shape in which the second region engages with a hole formed in the case member .

[5] In order to achieve the above object, the present invention provides a cover member for fixing a metal plate-like cover member covering at least a part of the opening of the shielded object to the shielded object with a screw member. In the mounting structure, the cover member has a through-hole into which a screw portion of the screw member is screwed, and the screw member has a first region having a screw portion screwed into the cover member, and than the first region provided at the distal end portion, seen including a second region for engaging the object to be shield, the cover member, the end of the cover member is bent toward the case member side A cylindrical portion in which a bent portion is formed and a through hole into which the screw portion of the first region of the screw member is screwed is inserted into the through hole from the outside of the cover member is burring processed are formed to protrude to the case member side by, Providing a mounting structure of the bar member.

  According to the present invention, it is possible to make it difficult to remove the cover member, and it is possible to prevent the destruction work on the inside of the cover member.

1A and 1B are diagrams showing a configuration example of a steering lock device according to a first embodiment of the present invention, where FIG. 1A is a cross-sectional view of the steering lock device, and FIG. The figure is shown. 2A and 2B are diagrams showing a cover member mounting structure according to the first embodiment of the present invention, in which FIG. 2A shows a state in which the cover member is attached by a tapping screw, and FIG. 2B shows a head portion of the tapping screw. Each shows a state in which ruptures. FIG. 3 is a diagram showing a cover member mounting structure shown as a comparative example, in which (a) shows a state where the cover member is attached by a tapping screw, and (b) shows a state where the head of the tapping screw is broken. Show. FIGS. 4A and 4B are diagrams showing a cover member mounting structure according to the second embodiment of the present invention, in which FIG. 4A shows a state in which the cover member is attached with screws, and FIG. Each state is shown.

[First Embodiment]
1A and 1B show a configuration example of a steering lock device according to a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of the steering lock device, and FIG. .

  The steering lock device 1 switches between a locked state in which the rotation of the steering shaft 2 is restricted and an unlocked state in which the rotation of the steering shaft 2 is not restricted by the operation of the steering lock mechanism 100 housed in the case member 10. It is configured to be possible.

  A steering wheel (not shown) operated by a vehicle driver is fixed to one end of the steering shaft 2 so as to rotate integrally. Further, a ring-shaped rotation restricting member 20 having a plurality of (12 in the example shown in FIG. 1) projections 20a on the outer peripheral portion is fixed to the steering shaft 2 so as not to be relatively rotatable. Between the adjacent protrusions 20a of the rotation restricting member 20, the same number of recesses 20b as the protrusions 20a are formed.

  The steering shaft 2 and the rotation restricting member 20 are rotatably supported inside a cylindrical support tube 21. The support tube 21 is sandwiched and held between the case member 10 and the bracket 11. The bracket 11 is fastened to the case member 10 with bolts 111.

  The steering lock mechanism 100 includes a lock bar 12, an L-shaped lift 13 that moves the lock bar 12 forward and backward, a motor 14 as a drive source, and a gear member 15 that transmits torque of the motor 14 to the lift 13. Configured.

  The lock bar 12 is held in a through-hole 10 a provided in the case member 10 and the support tube 21 so as to be movable back and forth. The lock bar 12 is movable between a lock position indicated by a solid line in FIG. 1A and an unlock position indicated by a two-dot chain line. When the lock bar 12 moves to the lock position, the leading end 12a of the lock bar 12 engages with the recess 20b of the rotation restricting member 20, and the rotation of the steering shaft 2 is restricted. Further, when the lock bar 12 is in the unlocked position, the lock bar 12 and the rotation restricting member 20 are not engaged, and the rotation of the steering shaft 2 is not restricted.

  As shown in FIG. 1B, the lock bar 12 is formed with a recess 12b along the moving direction, and a coil spring 16 is accommodated in the recess 12b. Further, the lock bar 12 is formed with a window portion 12c communicating with the recess 12b.

  The lift 13 has a distal end portion 13a fitted in a recess 12b formed in the lock bar 12 so as to be movable forward and backward, and a proximal end portion 13b having a screw hole 131b in which a female screw is formed. The tip portion 13 a is configured to abut against one end of the coil spring 16 in the recess 12 b of the lock bar 12. In addition, a pair of engagement protrusions 131 a that engage with the window portion 12 c of the lock bar 12 are provided at the distal end portion 13 a of the lift 13.

  The motor 14 is supported by a motor bracket 17 fixed to the inner surface of the case member 10. The motor 14 generates torque according to a motor current supplied from a control device (not shown), and rotates the worm 140 connected to the rotation shaft.

  The gear member 15 includes a worm wheel 151 that meshes with the worm 140, a shaft 152 that is coupled to the worm wheel 151, and a male screw portion 153 that is formed on the shaft 152. The male screw portion 153 is screwed into a female screw formed in the screw hole 131 b of the lift 13.

  When a motor current is supplied from the control device to the motor 14, the worm 140 is rotated by the torque of the motor 14, and the worm wheel 151 engaged with the worm 140 is rotated. As the worm wheel 151 rotates, the male screw portion 153 rotates, and the lift 13 is moved in the axial direction of the male screw portion 153.

  When the lift 13 moves toward the steering shaft 2, the tip 13 a of the lift 13 compresses and contracts the coil spring 16, and the lock bar 12 is pressed against the rotation regulating member 20 by the extension force of the coil spring 16. Then, the front end 12 a of the lock bar 12 engages with the recess 20 b of the rotation restricting member 20.

  When the motor 14 rotates in the reverse direction and the lift 13 moves away from the steering shaft 2, the lock bar 12 is pulled back by the engagement protrusion 131 a of the lift 13, and the front end portion 12 a of the lock bar 12 and the rotation restricting member 20 The engagement with the recess 20b is released.

  As shown in FIG. 1A, the case member 10 has an opening 10b. Each member constituting the steering lock mechanism 100 is assembled into the case member 10 through the opening 10b. The opening 10 b is closed by a lid 18 that prevents dust and the like from entering the case member 10. The lid 18 is fixed to the case member 10 with a plurality of bolts 181.

  The cover member 3 is fixed to the case member 10 so as to cover the opening 10b of the case member 10. The case member 10 is an example of an object to be shielded whose opening 10 b is covered by the cover member 3.

  The cover member 3 has a shape along the outer surfaces of the case member 10 and the lid 18, and a bent portion 3 a that is bent inward is formed at the opening end. The cover member 3 is fixed to the case member 10 by a plurality of tapping screws 4. The cover member 3 is made of metal, for example, iron-based metal materials such as cold-rolled steel (SPCC), hot-rolled steel (SPHC), carbon steel (S25C to S55C), copper-based metal materials, and aluminum-based metals. Materials etc. can be used.

  In the present embodiment, the cover member 3 is formed so as to cover the entire opening 10b, but the cover member 3 has an opening so that the plurality of bolts 181 that fix the lid 18 are not easily removed from the outside. You may form so that a part of part 10b may be covered.

  FIG. 2A is a cross-sectional view showing an attachment structure in which the cover member 3 is fixed by the tapping screw 4.

  A cylindrical portion 30 is formed on the cover member 3 by burring. Here, the burring process refers to a process of bending a peripheral portion of a through hole provided in advance to form a cylindrical shape.

  The inner diameter of the through hole 30a of the cylindrical portion 30 is formed smaller than the outer diameter of the screw portion 410 in which the male screw of the tapping screw 4 is formed. The cylindrical portion 30 is formed so as to protrude toward the case member 10, and a tip portion thereof is in contact with the outer surface of the case member 10.

  The screw portion 410 of the tapping screw 4 is inserted from the outside of the cover member 3 into the through hole 30a of the cylindrical portion 30. The tapping screw 4 is screwed toward the case member 10 to be screwed into the cover member 3 and the case member 10 while forming an internal thread on the inner surface of the cylindrical portion 30 of the cover member 3 and the case member 10. Here, the screwing means that the male screw and the female screw are engaged with each other, and the male screw is coupled to the member on which the female screw is formed by rotating the male screw so as to be movable in the axial direction.

  The tapping screw 4 includes a head portion 40 and a shaft portion 41 formed integrally with the head portion 40, and a female screw process for forming a female screw on the cover member 3 and the case member 10 at the tip portion of the shaft portion 41. A portion 41a is provided. The shaft portion 41 has a screw portion 410 having a male screw formed on the outer periphery thereof. The screw portion 410 includes a first region 411 that is screwed to the cover member 3 and a second region 412 that is screwed to the case member 10.

  The cylindrical portion 30 of the cover member 3 is subjected to burring so that the length in the direction of the central axis C (the axial direction of the tapping screw 4) is longer than the plate thickness of the cover member 3. The length of the cylindrical portion 30 in the direction of the central axis C is longer than the distance corresponding to one pitch of the thread of the tapping screw 4. Desirably, the length in the direction of the central axis C of the cylindrical portion 30 is longer than the distance corresponding to two pitches of the thread of the tapping screw 4. In the example shown in FIG. 2A, the length of the cylindrical portion 30 in the direction of the central axis C is about 4 pitches of the thread of the tapping screw 4.

  The head 40 of the tapping screw 4 is formed with a specially shaped groove that can be turned only by a dedicated tool. That is, the tapping screw 4 is a so-called tamper-proof screw. The tapping screw 4 may be a one-way screw that can be turned only in one direction. The tapping screw 4 is screwed with a dedicated tool until the head 40 contacts the cover member 3 and reaches a predetermined tightening torque.

  An internal thread may be formed in advance on the inner surface of the cylindrical portion 30 of the cover member 3. In addition, a pilot hole for facilitating tapping with the tapping screw 4 may be provided in a portion corresponding to the cylindrical portion 30 of the case member 10.

  FIG. 2B is a diagram showing a state in which the head 40 of the tapping screw 4 is broken from the shaft 41. Such destructive work on the tapping screw 4 is assumed to be performed by a person who intends to release the locked state of the steering lock mechanism 100 using a manual tool such as a flat-blade screwdriver.

  When the head portion 40 of the tapping screw 4 is broken from the shaft portion 41 at the fracture surface 41 b, the cover member 3 cannot be fixed to the case member 10 by the head portion 40. However, since the female screw formed in the cylindrical portion 30 is screwed into the first region 411 of the shaft portion 41 of the tapping screw 4, the coupled state between the cover member 3 and the case member 10 is maintained.

  3A and 3B show an attachment structure of the cover member 300 shown as a comparative example by the tapping screw 5. FIG. 3A shows a state where the cover member 300 is attached to the case member 10 by the tapping screw 5, and FIG. A state in which the head 50 is broken is shown.

  The cover member 300 is formed with a through hole 301 through which the tapping screw 5 is inserted, but the through hole 301 is not subjected to burring. The inner diameter of the through hole 301 is formed larger than the outer diameter of the shaft portion 51 of the tapping screw 5 (the diameter of the thread portion). Further, no male screw is formed in a region facing the inner surface of the through hole 301 of the shaft portion 51 of the tapping screw 5.

  In such an attachment structure, when the head portion 50 of the tapping screw 5 is broken at the fracture surface 51a, it becomes easy to remove the cover member 300 from the case member 10, and the inside of the case member 10 is broken or operated. It becomes easy.

  As described above, according to the present embodiment, even if the head 40 of the tapping screw 4 is removed, the first region 411 of the shaft portion 41 of the tapping screw 4 and the cylindrical portion 30 of the cover member 3 Since these are screwed together, it is difficult to remove the cover member 3. When the head 40 of the tapping screw 4 is removed, only the fracture surface 41b of the shaft portion 41 is exposed to the outside of the cover member 3, so that it is more difficult to rotate the shaft portion 41. Therefore, it becomes possible to prevent the destruction work with respect to the inside of the cover member 3, and the deterring effect of the vehicle theft can be enhanced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. This embodiment is common in that the screw member and the cover member 3 are coupled by screwing, but differs in that the screw member and the case member 10 are engaged by fitting rather than screwing. Yes.

  FIGS. 4A and 4B are diagrams showing a cover member mounting structure according to the second embodiment of the present invention, in which FIG. 4A shows a state in which the cover member is attached with screws, and FIG. Each state is shown. 4, components common to those in FIG. 2 are denoted by common reference numerals and description thereof is omitted.

  The screw 6 includes a head 60, a screw part 61 formed integrally with the head 60, and a columnar part 62 that is integrally provided on the distal end side of the screw 6 with respect to the screw part 61 and formed in a columnar shape. Have.

  In the case member 10, an inner cylindrical fitting hole 10 a is formed at a portion corresponding to the through hole 30 a of the cover member 3. Further, it is assumed that a female screw is formed in the through hole 30a of the cover member 3 after burring.

  When the case member 10 is covered with the cover member 3 and the screw 6 is screwed into the through hole 30 a of the cover member 3, the cylindrical portion 62 of the screw 6 is fitted into the fitting hole 10 a of the cover member 10.

  The fitting hole 10a of the case member 10 and the cylindrical portion 62 of the screw 6 may be formed so as to be fitted substantially without a gap by being press-fitted by an axial pressing force when the screw 6 is tightened. In addition, a predetermined gap may be formed between the outer surface of the cylindrical portion 62 and the inner surface of the fitting hole 10a.

  The region where the screw portion 61 of the screw 6 is screwed into the through hole 30a of the cover member 3 corresponds to the first region 6a, and the region where the cylindrical portion 62 of the screw 6 engages with the fitting hole 10a of the case member 10 is the region. This corresponds to the second region 6b.

  Even if the head portion of the screw 6 is broken as shown in FIG. 4B, the cover member 3 and the screw 6 are screwed together in the first region 6a by the mounting structure described above, and the case member 10 Since the screw 6 and the screw 6 are engaged in the second region 6b, the cover member 3 cannot be easily removed from the case member 10. Further, when the head 60 is removed, only the fracture surface 61b of the screw portion 61 is exposed to the outside of the cover member 3, so that it is more difficult to rotate the screw portion 61. Therefore, it becomes possible to prevent the destruction work with respect to the inside of the cover member 3, and the deterring effect of the vehicle theft can be enhanced.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to this embodiment, and various modifications such as those shown below are possible without departing from the scope of the present invention. is there.

  In the first embodiment, the internal thread is formed in the cover member 3 and the case member 10 by the internal thread processing portion 41a of the tapping screw 4. However, the present invention is not limited to this, and the internal thread is formed in the cover member 3 and the case member 10 in advance. You may keep it. In this case, it is possible to use a screw that is not a tapping screw (having no internal thread processed portion).

  In the said 2nd Embodiment, although the shape in the 2nd area | region 6b of the screw 6 was made into the column shape, it is not restricted to this, For example, square prism shape, a triangular prism, etc. may be sufficient. Moreover, the cylindrical shape which has a cavity inside may be sufficient. That is, the shape of the screw 6 in the second region 6 b may be a columnar shape that engages with the fitting hole 10 a of the case member 10.

  Furthermore, a thread may be formed also in the second region 6b of the screw 6 in the second embodiment. In this case, the inner diameter of the fitting hole 10a of the case member 10 is formed larger than the outer diameter of the thread of the second region 6b of the screw 6, and the tip of the thread of the second region 6b is the fitting hole 10a. The screw 6 and the case member 10 are engaged with each other by contacting the inner surface.

  In the above embodiment, the lid 18 is attached to the opening 10b of the case member 10, and the cover member 3 is attached so as to cover the lid 18 and the opening 10b. May be adhered to the case member 10 to prevent intrusion of dust and the like, and the lid 18 may be omitted.

  Further, the type of the steering lock mechanism is not limited to the type in which the lock bar is moved by a motor, and may be a structure in which, for example, the cam structure is driven by the rotation of a key inserted in the steering lock device to move the lock bar. . That is, the present invention can be applied without being restricted by the type of the steering lock mechanism.

  Moreover, although the case where this invention was applied to the steering lock apparatus 1 provided with the steering lock mechanism 100 was demonstrated in the said embodiment, the attachment target object of a cover member is not restricted to a steering lock apparatus. It is possible to apply the present invention to an object to be shielded that should prevent destruction work from the outside of a vehicle or an article other than a vehicle.

DESCRIPTION OF SYMBOLS 1 ... Steering lock apparatus, 2 ... Steering shaft, 3 ... Cover member, 3a ... Bending part, 6 ... Screw, 6a ... 1st area | region, 6b ... 2nd area | region, 10 ... Case member, 10a ... Through-hole, 10b ... Opening part, 11 ... Bracket, 12 ... Lock bar, 12a ... Tip part, 12b ... Recess, 12c ... Window part, 13 ... Lift, 13a ... Tip part, 13b ... Base end part, 14 ... Motor, 15 ... Gear Member: 16 ... Coil spring, 17 ... Motor bracket, 18 ... Lid, 20 ... Rotation restricting member, 20a ... Projection, 20b ... Recess, 21 ... Support tube, 30 ... Cylindrical part, 30a ... Through hole, 40 ... Head 41 ... Shaft part, 41a ... Female thread processing part, 41b ... Broken surface, 50 ... Head, 51 ... Shaft part, 51a ... Broken surface, 60 ... Head, 61 ... Screw part, 61b ... Broken surface, 62 ... Cylinder Part, 100 ... steering 111 ... Bolt, 131a ... Engagement projection, 131b ... Screw hole, 140 ... Worm, 151 ... Worm wheel, 152 ... Shaft, 153 ... Male screw part, 181 ... Bolt, 300 ... Cover member, 301 ... Through-hole , 410 ... threaded portion, 411 ... first region, 412 ... second region, C ... central axis

Claims (5)

A case member having an opening;
A steering lock mechanism housed inside the case member and capable of regulating the rotation of the steering shaft of the vehicle;
A metal plate-like cover member covering at least a part of the opening of the case member;
A screw member including a first region having a screw portion to be screwed to the cover member, and a second region to be screwed or engaged with the case member;
Equipped with a,
The cover member has a through hole into which the screw portion of the first region of the screw member is screwed, and a cylindrical portion into which the screw member is inserted into the through hole from the outside of the cover member is burring processed. A steering lock device that is formed to protrude toward the case member . The steering lock device according to claim 1, wherein the cover member is further formed with a bent portion where an end portion of the cover member is bent toward the case member .   The steering lock device according to claim 1 or 2, wherein the screw member is a tapping screw that forms a female screw in a hole formed in the case member and a hole formed in the cover member. The steering lock device according to claim 1 or 2, wherein the screw member has a columnar shape in which the second region engages with a hole formed in the case member . A cover member mounting structure for fixing a metal plate-like cover member covering at least a part of the opening of the shielded object to the shielded object by a screw member,
The cover member has a through hole into which a screw portion of the screw member is screwed,
The screw member comprises a first region having a threaded portion screwed into said cover member, and provided at the distal end portion than the first region, seen including a second region for engaging the object to be shield ,
The cover member has a bent portion in which an end portion of the cover member is bent toward the case member side, and has a through hole into which the screw portion of the first region of the screw member is screwed. A cover member mounting structure in which a cylindrical portion into which the screw member is inserted into the through hole from the outside of the cover member protrudes toward the case member by burring .

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