Vehicle antitheft device

Abstract

To provide a vehicle anti-theft device capable of preventing theft of a vehicle with a simple structure.SOLUTION: The anti-theft device 100 includes a first block 110 disposed between the tire 10 and the tire ground contact surface 2 from the front side of the vehicle 1, a second block 120 disposed between the tire 10 and the tire ground contact surface 2 from the rear side of the vehicle, and a connecting portion 140 that fixes the first block 110 and the second block 120 to each other with the tire 10 interposed therebetween. A rotatable roller 112 whose shaft 112a is parallel to the rotation shaft 10B of the tire 10 is provided on the pedestal 111 of the first block 110, and a rotatable second roller 122 whose shaft 122a is parallel to the rotation shaft 10B of the tire 10 is provided on the pedestal 121 of the second block 120. When the tire 10 is illegally rotated at the time of mounting the anti-theft device 100, the tire 10 is idled by the action of the roller 112,122.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle theft prevention device, and more particularly to a vehicle theft prevention device that prevents theft by mechanically preventing the starting operation of a vehicle. [Background technology]

[0002] Conventionally, anti-theft devices that use the vehicle's electronic control device to prohibit the vehicle from starting (for example, devices that prohibit operation by persons without the smart key by ID code authentication using the vehicle's smart key), anti-theft devices for vehicles that mechanically prohibit the rotation of the steering wheel of the vehicle, and even anti-theft devices that mechanically prohibit the rotation of the vehicle's tires have been generally known. Of these, anti-theft devices that mechanically prohibit tire rotation have a simple structure and can be confirmed to be installed from outside the vehicle, so they are expected to be effective in deterring theft, and are used in conjunction with the anti-theft devices using the electronic control devices mentioned above.

[0003] Anti-theft devices that mechanically prevent tire rotation include one that inserts an iron bar into the wheel hole of the tire to prevent rotation (Japanese Patent Publication No. 2002-173001), and another that punctures the tire if it is rotated illegally (Japanese Patent Publication No. 2016-88177). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-173001 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-88177 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when an anti-theft device that mechanically prohibits tire rotation is used, there is a risk that someone who fraudulently disables the theft prevention provided by the electronic control device could start the engine or drive motor and force the vehicle to start. If a vehicle is started illegally with an anti-theft device that mechanically prohibits tire rotation installed, damage to the tire or tire wheel that is trying to rotate may occur, and in some cases, excessive force may be applied to the vehicle's drive system, causing abnormalities, so there is a risk of damage to the vehicle even if theft is prevented.

[0006] The present invention has been made in view of the above circumstances, and aims to provide a vehicle theft prevention device that can physically prevent vehicle theft even if the theft prevention state set by the electronic control device is illegally released and the vehicle engine or drive motor is operated, and that can also prevent damage to the tires and wheels and failure of the drive system. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the vehicle anti-theft device of the first invention of the present application comprises a first block placed between the tire and the tire contact surface from the front or rear of the vehicle, a second block placed between the tire and the tire contact surface from the front or rear of the vehicle, and connecting means for fixing the first block and the second block to each other with the tire sandwiched between them, wherein the base of the first block is provided with a first roller unit having a roller that is rotatable relative to the base and whose axis is parallel to the tire's rotation axis, and the base of the second block is provided with a second roller unit having a roller that is rotatable relative to the base and whose axis is parallel to the tire's rotation axis.

[0008] In addition, the second invention of the present application is a vehicle theft prevention device according to the first invention, wherein the first roller portion and the second roller portion are provided with an idling roller that causes the tire to spin freely, and an idling auxiliary roller that is positioned above the idling roller so as to be able to abut against the tread surface of the tire and causes the tire to spin freely.

[0009] Furthermore, the third invention of the present application is a vehicle theft prevention device according to the second invention, wherein the shaft of the idling auxiliary roller is slidably supported in a bearing hole formed in a narrow and elongated base portion, and the connecting means is provided with a roller spacing adjustment portion that can change the distance between the shaft of the idling auxiliary roller of the first block and the shaft of the idling auxiliary roller of the second roller.

[0010] Furthermore, the fourth invention of the present application is a vehicle theft prevention device according to the first invention, wherein the first roller portion and the second roller portion comprise an idling roller arranged near the tire contact surface, an idling auxiliary roller arranged above the idling roller so as to be able to abut against the tire tread surface, and an anti-ride-up roller arranged above the idling auxiliary roller so as to be able to abut against the tire tread surface.

[0011] In addition, a fifth invention of the present application provides an anti-theft vehicle device comprising: a first block arranged between the tire and the road surface contact patch from the front or rear of the vehicle; a second block arranged between the tire and the road surface contact patch from the front or rear of the vehicle; a third block arranged on the top of the tread surface of the tire; a first connecting means for connecting and fixing the first block and the second block to each other on the tire contact patch side; and a second connecting means for connecting the first block and the second block via the third block on the top side of the tire; a first roller unit is provided on the base of the first block, the first roller unit being rotatable relative to the base and having a roller whose axis is parallel to the rotational axis of the tire; a second roller unit is provided on the base of the second block, the second roller unit being rotatable relative to the base and having a roller whose axis is parallel to the rotational axis of the tire; and a third roller unit is provided on the base of the third block, the third roller unit being rotatable relative to the base and having a roller whose axis is parallel to the rotational axis of the tire.

[0012] In addition, the sixth invention of the present application is a vehicle theft prevention device according to the fifth invention, wherein two rollers are provided on each of the first roller portion and the second roller portion, and the base portion of the first block and the base portion of the second block are attached with the two rollers so that when the tire rides up on the base portion, the two rollers lift the tread surface off the tire contact surface.

[0013] According to the first invention of the present application, by connecting the first block and the second block to each other while the rollers of the first roller section and the rollers of the second roller section are in contact with the tire from the front and rear of the tire, even if the tire is rotated improperly, the tire will spin freely due to the action of the first roller and the second roller. According to the second invention of the present application, even if the vehicle starts off in such a way that the tire rides over the idling rollers of the first roller portion and the second roller portion, the idling auxiliary rollers of the first roller portion and the second roller portion ensure that the tire can idly.

[0014] According to the third invention of the present application, when connecting the first block and the second block, the distance between the second roller of the first block and the second roller of the second block can be adjusted to match the outer diameter of the tire.

[0015] According to the fourth invention of the present application, the idling rollers, idling auxiliary rollers, and anti-ride-on rollers of the first block and the idling rollers, idling auxiliary rollers, and anti-ride-on rollers of the second block ensure that the tire can idly run over the first block and the second block.

[0016] According to the fifth aspect of the present invention, the anti-theft device can be mounted so that the first block, the second block, and the third block surround the entire circumference of the tire via the connecting means. According to the sixth aspect of the present invention, when a tire equipped with an anti-theft device rotates and rides over the base portion of the first block or the base portion of the second block, the tire lifts off the tire contact surface and spins freely on the first roller and the second roller. [Brief explanation of the drawings]

[0017] [Figure 1] 1A and 1B are a perspective view and a front view showing an anti-theft device 100 according to a first embodiment of the present invention. [Figure 2] 1A and 1B are perspective and front views showing a method of attaching an anti-theft device 100 to a tire 10. [Figure 3] 1A and 1B are a perspective view showing a method for attaching a roller 112 to a base 111 of a first block 110 and a front view with a part of the roller 112 cut away. [Figure 4] 10A and 10B are a perspective view and a front view showing an anti-theft device 200 according to a second embodiment of the present invention. [Figure 5] 1A and 1B are perspective and front views showing a method of attaching an anti-theft device 200 to a tire 10. [Figure 6] 1 is a front view showing a state in which an anti-theft device 300 equipped with a roller gap adjustment unit 370 is mounted on tires 10 and 20. FIG. [Figure 7] 10 is an explanatory diagram showing a roller distance adjusting section 370 attached to a first block 310 and a second block 320 of an anti-theft device 300. FIG. [Figure 8] 3A and 3B are a perspective view showing a first block 310 of an anti-theft device 300 equipped with a roller distance adjusting portion 370 and a front view with a part of a roller 313 attached to the first block 310 cut away. [Figure 9] 10A and 10B are a perspective view and a front view showing an anti-theft device 400 according to a third embodiment of the present invention. [Figure 10] 1A and 1B are perspective and front views showing a method of attaching an anti-theft device 400 to a tire 10. [Figure 11] 10A and 10B are a perspective view and a front view showing an anti-theft device 500 according to a fourth embodiment of the present invention. [Figure 12] 1A and 1B are perspective and front views showing a method of attaching an anti-theft device 500 to a tire 10. [Figure 13]10 is a perspective view showing a state in which an anti-theft device 600 according to a fifth embodiment of the present invention is mounted on a tire 10, and a perspective view showing the anti-theft device 600. FIG. [Figure 14] 1 is a front view showing a method for attaching an anti-theft device 600 to a tire 10. FIG. [Figure 15] FIG. 10 is a front view showing the anti-theft effect when the tire 10 to which the anti-theft device 600 is attached is rotated illegally. DETAILED DESCRIPTION OF THE INVENTION

[0018] (First embodiment) An anti-theft device 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. As shown in Figures 1 and 2, the anti-theft device 100 is composed of a first block 110, a second block 120, and a connecting portion (connecting means) 140 for fixing the first block 110 and the second block 120 to each other on the tire contact surface 2 side with the tire 10 in between.

[0019] Of these, the first block 110 is arranged from the front of the vehicle 1 (left side in Figures 1 and 2) between the tread surface 10A of the tire 10 and the tire contact surface 2, and consists of a base 111 and a roller (idling roller) 112. As shown in FIG. 3(A), the base 111 is made up of two side walls 111A, 111A and a rear wall 111B connecting these two side walls 111A, 111A. Mounting holes 111c, 111c are formed in the side walls 111A, 111A of the base 111, and the shaft 112a of the roller 112 is supported at both ends by these mounting holes 111c, 111c.

[0020] As shown in FIG. 3(B), the roller (idling roller) 112 has a cylindrical body 112d that is rotatable around a shaft 112a by the action of a bearing 112c. When the anti-theft device 100 is attached to the tire 10 (Figure 1), the axis 112a is positioned so as to be parallel to the rotation axis 10B of the tire 10 (dotted line in Figure 1(A)), and the roller 112 rotates while the outer surface of the cylindrical body 112d abuts against the tread surface 10A of the tire 10.

[0021] As shown in Figures 1 and 2, the second block 120 is arranged between the tread surface 10A of the tire 10 and the tire contact surface 2 from the opposite side (right side in the figure) of the first block 110 across the tire 10, and consists of a base 121 and a roller (idling roller) 122. Here, the structure of the second block 120 is the same as the structure of the first block 110 described above, and therefore a detailed description thereof will be omitted. In the anti-theft device 100 , the roller 112 constitutes a first roller portion of the first block 110 , and the roller 122 constitutes a second roller portion of the second block 120 .

[0022] As shown in Figure 2, the connecting portion 140 of the anti-theft device 100 connects and secures the first block 110 located at the front of the vehicle 1 (left side in Figure 2) and the second block 120 located on the opposite side (rear) of the tire contact surface 2, and is composed of a pair of levers 141, 141, latch portions 142, 142 (only one is shown) provided on the side wall of the second block 120, and a lock 143.

[0023] Of these, one end 141A of the pair of levers 141 is fixed to the side wall 111A of the first block 110, and the other end 141B is suspended in the air so as to be insertable into the latch portion 142 of the second block 120. Further, the other ends 141B, 141B of the levers 141, 141 are provided with lock holes 141c, 141c, respectively.

[0024] When connecting the first block 110 and the second block 120 with the tire 10 sandwiched therebetween, the other ends 141B, 141B of the levers 141, 141 fixed on the first block 110 side are inserted into the latch portions 142, 142 until the lock holes 141c, 141c of the levers 141, 141 protrude. At this time, an arm 143a of a lock 143 is passed through the protruding lock holes 141c, 141c and locked by the lock 143, so that the first block 110 and the second block 120 are connected to each other.

[0025] When the tire 10 is rotated illegally with the anti-theft device 100 attached to it (FIG. 1), the tread surface 10A of the tire 10 comes into contact with the outer peripheral surfaces of the rollers 112 of the first block 110 and the rollers 122 of the second block 120, causing the tire 10 to spin freely due to the action of these rollers 112 and 122. Therefore, with the anti-theft device 100 installed, the vehicle 1 will not start moving even if the tire 10 rotates. Furthermore, if the anti-theft device 100 is installed, even if the tire 10 is rotated illegally, the tire 10 will simply spin freely, and the tire or wheel will not be damaged.

[0026] (Second embodiment) Next, an anti-theft device 200 according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 4A is a perspective view and FIG. 4B is a front view showing an anti-theft device 200 according to a second embodiment of the present invention.

[0027] Similar to the anti-theft device 100, the anti-theft device 200 is made up of a first block 210, a second block 220, and a connecting portion (connecting means) 240 that secures the first block 210 and the second block 220 to each other on the tire contact patch 2 side with the tire 10 in between, but differs from the anti-theft device 100 in that rollers (idling auxiliary rollers) 213, 223 are added to the bases 211, 221 of the first roller portion and the second roller portion. The structure of the rollers 213, 223 is the same as the roller 112 (FIG. 3(B)) of the anti-theft device 100. The other structure of the anti-theft device 200 is the same as that of the anti-theft device 100, so a detailed description will be omitted.

[0028] In the anti-theft device 200, as shown in FIG. 5, mounting holes 211c, 211c are formed in the side walls 211A, 211A constituting the base 211 of the first block 210, and the shafts (not shown) of the rollers (idling rollers) 212 are supported in the mounting holes 211c, 221c. Furthermore, the shaft (not shown) of the roller (idling auxiliary roller) 213 is supported in mounting holes 211d and 221d formed in the side walls 211A and 211A of the base 211. In addition, the shaft (not shown) of roller (idling roller) 222 is supported in mounting holes 221c, 221c formed in side walls 221A, 221A of base 221 on the second block 220 side, and the shaft (not shown) of roller (idling auxiliary roller) 223 is supported in mounting holes 221d, 221d. In the anti-theft device 200 , the rollers 212 and 213 constitute a first roller portion of the first block 210 , and the rollers 222 and 223 constitute a second roller portion of the second block 220 .

[0029] When the anti-theft device 200 is attached to the tire 10, as shown in Figures 4 and 5, the first block 210 is placed between the tread surface 10A and the tire contact surface 2 from the front of the vehicle 1 (the left side in the illustrated example). The second block 220 is positioned from the rear of the vehicle 1 between the tread surface 10A and the tire contact surface 2, and at this time the other ends 241B, 241B of the levers 241, 241 are inserted into the latch portions 242, 242, and the arms 243a of the lock 243 are passed through the protruding lock holes 241c, 241c to lock the vehicle.

[0030] When the tire 10 is illegally rotated with the anti-theft device 200 attached to the tire 10 (FIG. 4), the tread surface 10A of the tire 10 will spin due to the action of the rollers (idling rollers) 212 and (idling auxiliary rollers) 213 of the second block 220, and the rollers (idling rollers) 222 and (idling auxiliary rollers) 223 of the second block 220.

[0031] Therefore, when the anti-theft device 200 is installed, the vehicle 1 cannot start even if the tire 10 is rotated illegally. In addition, since the tire 10 rotates freely due to the rollers 212, 213 and rollers 222, 223, the tire and wheel are not damaged.

[0032] 6, 7 and 8 are diagrams showing a modified example of the second embodiment in which a roller distance adjusting section 370 is provided on the connecting section (connecting means) 340 of the anti-theft device 300. In FIG. The anti-theft device 300 is configured so that the distance between the roller (idle auxiliary roller) 313 on the first block 310 side and the idle auxiliary roller 323 on the second block 320 side can be adjusted according to the outer diameter of the tire using the roller distance adjustment unit 370. 6A shows an example in which the anti-theft device 300 is mounted on a small-diameter tire 10, and FIG. 6B shows an example in which the anti-theft device 300 is mounted on a large-diameter tire 20. In FIG. Only one of the pair of levers 341, 341 connecting the first block 310 and the second block 320 will be illustrated and described below.

[0033] The roller gap adjustment part 370 provided in the anti-theft device 300 is composed of a slender hole 341e provided in the lever 341 of the connecting part 340, a male screw part 341f, an adjustment ring 345, and an adjustment screw 346, as shown in Figures 7(A) and (B). The length of the adjustment ring 345 is determined according to the outer diameter of the tire to which the anti-theft device 300 is attached. By selecting the adjustment ring 345 (345A, 345B in FIG. 6) according to the outer diameter of the tire, the anti-theft device 300 can be attached to tires (10, 20) of different outer diameters.

[0034] 7(C), in the first block 310 to which the roller gap adjustment part 370 is attached, the bearing hole 311d provided in the side wall 311A ​​of the base 311 is formed in an elongated shape that faces diagonally upward from the front (left side in the figure) to the rear of the vehicle 1. In the second block 320, the bearing hole 321d provided in the side wall 321A (only one side is shown) of the base 321 is formed in an elongated shape that faces diagonally upward from the rear to the front of the vehicle 1.

[0035] 8, rollers (idling auxiliary rollers) 313 of the first block 310, whose roller spacing is adjusted, have both ends of shaft 313a inserted into bearing holes 311d, 311d. At this time, protrusions 313c, 313c provided on the ends of shafts 313a, 323a protrude from side walls 311A, 311A ​​of the first block 310.

[0036] The protruding convex portion 313c is fitted into bearing holes 341d, 341d of the lever 341 shown in FIG. 7(A). Here, the roller (idling auxiliary roller) 323 of the second block 320 has the same structure as the roller 313 shown in FIG. 7(A), and therefore a detailed description thereof will be omitted.

[0037] As described above, since both bearing hole 311d of first block 310 and bearing hole 321d of second block 320 are formed elongated, roller (idling auxiliary roller) 313 of first block 310 and roller (idling auxiliary roller) 323 of second block 320 can move in the fore-and-aft direction of vehicle 1 (moving along bearing holes 311d, 321d facing diagonally upward in Figure 7(C)).

[0038] To adjust the gap between the rollers, an adjustment ring 345 is fitted onto the other end 341B of the lever 341 until the male thread portion 341f projects, and the female thread 346d of the adjustment screw 346 is screwed into the projecting male thread portion 341f. Therefore, when the adjustment screw 346 is rotated, the adjustment ring 345 is pressed against the first block 310 side, and the distance between the roller 313 on the first block 310 side and the roller 323 on the second block 320 side changes.

[0039] The anti-theft device 300 is attached to the tire 10 (sandwiched and tightly attached between the idling roller 313 of the first block 310 and the idling roller 323 of the second block 320), and by gradually rotating the adjustment screw 346, the idling auxiliary roller 313 of the first block 310 and the idling auxiliary roller 323 of the second block 320 are attracted to sandwich the tire 10 and pressed against the tread surface 10A of the tire 10.

[0040] The anti-theft device 300 having the roller interval adjusting part 370 makes the rollers 312, 322 and the rollers 313, 323 contact the tread surface 10A regardless of the size of the tire 10, so that even if the tire 10 is rotated illegally when mounted, it will spin freely, thereby preventing theft of the vehicle.

[0041] (Third embodiment) An anti-theft device 400 according to a third embodiment of the present invention will be described with reference to FIGS. In the anti-theft device 400, a base 411 of a first block 410 is provided with a roller (idle roller) 412, a roller (idle auxiliary roller) 413, and further with a roller (ride-on prevention roller) 414. Moreover, on the base 421 of the second block 420, in addition to the rollers (idle rollers) 422 and rollers (idle auxiliary rollers) 423, a roller (anti-ride-on roller) 424 is further provided. The first block 410 and the second block 420 are connected to each other by a connecting portion (connecting means) 440 .

[0042] In this anti-theft device 400 , rollers 412 , 413 , and 414 constitute a first roller portion of a first block 410 , and rollers 422 , 423 , and 424 constitute a second roller portion of a second block 420 . The other basic structure of the anti-theft device 400 is the same as that of the anti-theft device 200, and detailed description thereof will be omitted.

[0043] In the first block 410 of the theft prevention device 400, as shown in FIG. 10, the shaft of a roller (idling roller) 412 is supported in mounting holes 411c, 411c of the side walls 411A, 411A of the base 411, the shaft of a roller (idling auxiliary roller) 413 is supported in mounting holes 411d, 411d, and the shaft of a roller (anti-ride-on roller) is supported in mounting holes 411e, 411e.

[0044] In addition, in the second block 420, the shaft of a roller (idle roller) 422 is supported in mounting holes 421c, 421c (only one is shown) of side walls 421A, 421A of the base 421, the shaft of a roller (idle auxiliary roller) 423 is supported in mounting holes 421d, 421d, and the shaft of a roller (anti-ride-up roller) 424 is supported in mounting holes 411e, 411e.

[0045] When the anti-theft device 400 is attached to the tire 10, as shown in Figures 9 and 10, the first block 410 is placed from the front of the vehicle 1 between the tread surface 10A and the tire contact surface 2, and then the second block 420 is placed from the rear of the tire 10 between the tread surface 10A and the tire contact surface 2. At this time, the levers 441, 441, one end of which is fixed to the first block 410 side, are inserted into latch portions 442, 442 provided on the second block 420 until the lock holes 441c, 441c at the other end project. An arm 443a of a lock 443 is passed through lock holes 441c, 441c protruding from the latch portions 442, 442 to lock the door.

[0046] When the tire 10 is rotated with the anti-theft device 400 attached to it (Figure 9), the tire 10 rotates with its tread surface 10A in contact with the three rollers on the first block 410 side (idle roller 412, idle auxiliary roller 413, and anti-ride-up roller 414) and the three rollers on the second block 220 side (idle roller 422, idle auxiliary roller 423, and anti-ride-up roller 424). Therefore, when the anti-theft device 400 is installed, the vehicle 1 cannot start moving because the tire 10 will spin freely even if it rotates. Furthermore, even if the tire 10 rotates, the rollers 412, 413, 414 and rollers 422, 423, 424 cause the tire 10 to spin freely, so the tire and wheel are not damaged.

[0047] (Fourth embodiment) An anti-theft device 500 according to a fourth embodiment of the present invention will be described with reference to FIGS. The anti-theft device 500 according to the fourth embodiment differs from the anti-theft device 200 according to the second embodiment in that it further comprises a third block 530 in addition to a first block 510 and a second block 520 .

[0048] Specifically, in the anti-theft device 500, a pair of levers 541, 541 constituting the connecting portion (first connecting portion means) 540 has one end 541A, 541A rotatably attached to side walls 511A, 511A of a base 511 of a first block 510. In addition, the first block 510 and the third block 530 are connected in advance by a wire (second connecting means) 550, and further, the wire 550 extends from the third block 530 toward the second block 520, with its end 550A being U-shaped.

[0049] When this anti-theft device 500 is attached to the tire 10, the first block 510, which is previously connected to the third block 530 by a wire 550, is placed between the tire contact surface 2 and the tread surface 10A from the front of the vehicle 1, and the third block 530 is placed on the top 10C of the tire 10. At this time, the levers 541, 541 are rotated, and the other ends 541B, 541B move upward (FIGS. 12(A) and 12(B)).

[0050] With one end 541B, 541B of the pair of levers 541, 541 pulled up, the second block 520 is positioned between the tread surface of the tire 10 and the tire contact surface 2, and then the pair of levers 541, 541 are pulled downward (arrow in Figure 12 (B)). At this time, a U-shaped end portion 550A of the wire 550 is hooked onto notches 541c, 541c formed in the other ends 541B, 541B of the pair of levers 541, 541.

[0051] The levers 541, 541 to which the end 550A of the wire 550 is hooked are rotated to a position where the through holes 541d, 541d overlap with the through holes 521d, 521d of the base 521 of the second block 520, and then the arm 543a of the lock 543 is passed through the through holes 541d, 541d and the through holes 521d, 521d to lock the levers.

[0052] In the anti-theft device 500, the first block 510 and the second block 520 are connected on the tire contact patch 2 side, and are also connected by a wire 550 via a third block 530 on the top portion 10C side of the tire 10. As a result, the anti-theft device 500 covers the entire circumference of the tire 10 with the first block 510, the connecting portion (first connecting portion) 540, the second block 520, the third block 530, and the wire (second connecting portion) 550.

[0053] When the tire 10 is rotated with the anti-theft device 500 attached around the entire circumference of the tire 10 (Figure 11), the rollers 512, 513 provided on the base 511 of the first block 510, the rollers 522, 523 provided on the base 521 of the second block 520, and the rollers 532, 533 provided on the base of the third block 530 come into contact with the tread surface 10A of the tire 10, so that the tire 10 spins freely even when rotated. Therefore, when the anti-theft device 500 is installed, the tires 10 spin freely, and the vehicle 1 cannot start moving. Furthermore, even if the tire 10 is forcibly rotated, the rollers 512, 513, rollers 522, 523, and rollers 532, 533 cause the tire to spin freely, and the tire and wheel are not damaged. In the anti-theft device 500, rollers 512 and 513 constitute the first roller portion of the first block 510, rollers 522 and 523 constitute the second roller portion of the second block 520, and rollers 532 and 533 constitute the third roller portion of the third block 530. In the fourth embodiment of the anti-theft device 500, the first block 510 and the second block 520 are connected by a wire 550 via the third block 530, but they may also be connected by a link mechanism using a steel plate or a chain.

[0054] (Fifth embodiment) An anti-theft device 600 according to a fifth embodiment of the present invention will be described with reference to FIGS. Similar to the above-described anti-theft device 500, the anti-theft device 600 of the fifth embodiment has a first block 610 and a second block 620 that sandwich the tire 10 on the tire contact surface 2 side, and also has a third block 630 arranged on the top 10C side of the tire 10.

[0055] In the anti-theft device 600, a first block 610 and a second block 620 are connected by a connecting portion (first connecting means) 640 consisting of a pair of levers 641,641. The first block 610 and the third block 630 are connected by wires 650, 650, and the second block 620 and the third block 630 are connected by wires 660, 660 (second connecting means).

[0056] As will be described in detail below, the anti-theft device 600 is configured to use the initial rotation of the tire 10 when it begins to rotate during installation to cause the tire 10 to ride onto the first block 610 (or the second block 620). When the tire 10 climbs onto the first block 610 (second block 620), the tire 10 is supported by the rollers 612, 613 on the base 611 side of the first block 610 (or the rollers 622, 623 on the base 621 side of the second block 620) and spins.

[0057] The levers 641, 641 of the connecting portion 640 have one end 641A, 641A rotatably attached to the first block 610, and the other end 641B, 641B has notches 641c, 641c formed therein (FIG. 14(A)). These notches 641c, 641c are hooked onto the protrusions 625, 625 on the second block 620 side, and the first block 610 and the second block 620 are connected together.

[0058] Wires 650 , 650 connecting the first block 610 and the third block 630 have one end fixed to the protrusions 615 , 615 of the first block 610 and the other end fixed to the protrusions 635 , 635 of the third block 630 . Furthermore, wires (wire locks) 660, 660 connecting the second block 620 and the third block 630 have one end (one end of wire 660A) fixed to the protrusions 626, 626 of the second block 620 and the other end (one end of wire 660B) fixed to the protrusions 636, 636 of the third block 630, and a wire lock (wire head 665A, insertion portion 665B) is provided in the middle portion (between wires 660A and 660B). In the anti-theft device 600, rollers 612 and 613 constitute the first roller portion of the first block 610, rollers 622 and 623 constitute the second roller portion of the second block 620, and rollers 632 and 633 constitute the third roller portion of the third block 630.

[0059] When mounting the thus configured anti-theft device 600 on the tire 10, as shown in Figure 14(A), the first block 610 to which the third block 630 is previously connected by a wire 650 is placed between the tread surface 10A and the tire contact surface 2 from the front of the vehicle 1. Next, the ends of the levers 641, 641 are rotated upward, and in this state, the second block 620 is placed between the tread surface 10A and the tire ground contact surface 2 from the rear of the vehicle 1 (FIG. 14(A)). Thereafter, the levers 641, 641 are rotated downward to fit the notches into the protrusions of the second block 620 (FIG. 14(B)).

[0060] The third block 630 is placed on the top 10C of the tire 10, and the wire 660 (660A) connected to the third block 630 side is routed around to the second block 620 side, and the wire 660 (660B) connected to the second block 620 side is pulled up to the third block 630 side.

[0061] Insertion portion 665B provided at the open end of wire 660A on the third block 630 side is inserted into wire head 665A provided at the open end of wire 660B on the second block 620 side to lock. As a result, the first block 610, the second block 620, and the third block 630 are attached so as to surround the entire circumference of the tire 10 by the pair of levers 641, 641, the wires 650, 650, and the wires 660, 660 (FIG. 14(C)).

[0062] When the anti-theft device 600 is attached to the tire 10, the tire 10 is in contact with the ground (tire contact surface 2 in FIG. 15(A)). When the tire 10 starts to rotate clockwise in FIG. 12 while in a state where the tire 10 is in contact with the ground, this rotation causes the tire 10 to ride up onto the base 621 of the second block 620 (FIG. 15(B)). When the tire 10 rides over the second block 620, the tread surface 10A of the tire 10 comes into contact with and is supported by the rollers 622, 623, creating a gap Δh between the tread surface 10A of the tire 10 and the ground, after which the tire 10 starts to spin.

[0063] Conversely, when the tire 10 is in contact with the ground and begins to rotate counterclockwise in Figure 12, the tire 10 rides up onto the base 611 of the first block 610 (Figure 15(C)), a gap Δh is created between the tread surface 10A of the tire 10 and the ground, and the tire 10 then begins to spin.

[0064] Therefore, when the tire 10 is rotated with the anti-theft device 600 attached, the tire 10 runs onto the first block 610 or the second block 620 and spins, preventing the vehicle 1 from starting. Even if the tire 10 is then rotated, it will continue to spin freely, so there will be no damage to the tire or wheel.

[0065] In the fifth embodiment of the anti-theft device 600, the first block 610 and the third block 630, and the second block 620 and the third block 630 are connected by wires, but they may also be connected by levers using iron plates or iron bars. Furthermore, in the anti-theft device described in this embodiment, an example has been given in which the first block is placed at the front of the vehicle and the second block is placed at the rear of the vehicle, but it goes without saying that the first block may also be placed at the rear of the vehicle and the second block at the front of the vehicle. [Explanation of symbols]

[0066] 1 vehicle 2 Tire contact surface 10 Tires 10A tread surface 100,200,300,400,500,600 Anti-theft devices 110, 210, 310, 410, 510, 610 First block 111,211,311,411,511,611 Pedestal 112,122,212,222,312,322,412,422,512,522,612,613,622,623 Rollers (idling rollers) 120, 220, 320, 420, 520, 621 Second Block 121,221,321,421,521,621 Pedestal 140, 240, 340, 440, 540, 640 Connection portion (connection means, first connection means) 213, 223, 313, 323, 413, 423, 513, 523 Rollers (idling auxiliary rollers) 370 Roller spacing adjustment unit 414,424 Roller (anti-ride roller) 530,630 Third Block 550, 650, 660 Wire (second connecting means)

Claims

1. a first block disposed between the tire and the tire contact surface from the front or rear of the vehicle; a second block disposed between the tire and the tire contact surface from the rear or front of the vehicle; a connecting means for fixing the first block and the second block to each other with the tire sandwiched therebetween, a first roller unit is provided on the base of the first block, the first roller unit having a roller that is rotatable relative to the base and has an axis parallel to the rotation axis of the tire; A vehicle anti-theft device according to claim 1, wherein the base of said second block is provided with a second roller portion having a roller which is rotatable relative to said base and has an axis parallel to the axis of rotation of the tire.

2. 2. The vehicle theft prevention device according to claim 1, wherein the first roller portion and the second roller portion comprise an idling roller that causes the tire to spin idly, and an idling auxiliary roller that is positioned above the idling roller so as to be able to abut against the tread surface of the tire to cause the tire to spin idly.

3. The shaft of the idle auxiliary roller is slidably supported in a bearing hole formed in a slender shape in the base portion, 3. The vehicle theft prevention device according to claim 2, wherein the connecting means is provided with a roller spacing adjustment section that can change the distance between the axis of the idle rotation auxiliary roller of the first block and the axis of the idle rotation auxiliary roller of the second roller.

4. 2. The vehicle theft prevention device according to claim 1, wherein the first roller portion and the second roller portion comprise an idling roller arranged near the tire contact surface, an idling auxiliary roller arranged above the idling roller so as to be able to abut against the tire tread surface, and an anti-ride-up roller arranged above the idling auxiliary roller so as to be able to abut against the tire tread surface.

5. a first block disposed between the tire and the tire contact surface from the front or rear of the vehicle; a second block disposed between the tire and the tire contact surface from the rear or front of the vehicle; a third block disposed on the tread surface of the top portion of the tire; a first connecting means for connecting and fixing the first block and the second block to each other on the tire contact surface side; a second connecting means for connecting the first block and the second block via the third block at the top side of the tire; a first roller unit is provided on the base of the first block, the first roller unit having a roller that is rotatable relative to the base and has an axis parallel to the rotation axis of the tire; a second roller unit is provided on the base of the second block, the second roller unit having a roller that is rotatable relative to the base and has an axis parallel to the rotation axis of the tire; A vehicle anti-theft device characterized in that the base of the third block is provided with a third roller portion having a roller that is rotatable relative to the base and has an axis parallel to the rotation axis of the tire.

6. The first roller unit and the second roller unit each include two rollers, 6. A vehicle theft prevention device according to claim 5, wherein the base portion of the first block and the base portion of the second block are attached with two rollers so that when the tire rides on the base portion, the two rollers create a predetermined gap between the tread surface and the tire contact surface.

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