JP3002177U - Lock device - Google Patents

Abstract

(57) [Abstract] [Purpose] To enhance the high pull-out strength of the locking device and prevent breakage and unauthorized unlocking. [Structure] A pair of substantially E-shaped engaging plates, which are composed of a lock body and a U-shaped lock rod, and which have engaging portions at both ends with an actuated portion in the center, are arranged in reverse in the front-rear and left-right directions. A lock core rotor is provided slidably toward each other, an arcuate notch is formed in the adjacent engaging portion, and the lock core rotor having an operating portion between the operated portions is rotatably provided. When the adjacent engaging portions are urged toward each other and the leg portions of the lock rod are inserted into the lock body, the engaging plates are once urged in the opposite directions against the urging member and then urged. Returned by a member, the engagement portion is fitted into the annular groove of the lock rod and locked, and when the lock core rotor is rotated by a predetermined angle with a predetermined key, the engagement plate is moved against the biasing member, It is unlocked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking device, particularly a U-shaped locking device suitable for motorcycles.

[0002]

[Prior art]

 In particular, high-end motorcycles in developed countries such as Japan and Western countries often have the same price as or more than the price of a passenger car, and if stolen, it is a big loss. Therefore, there is a demand for a motorcycle locking device that is effective in preventing theft.

Since the known motorcycle locking device is generally preferred and used with high precision, even if a locksmith specializes in it, it is very difficult to illegally unlock it without a suitable key. It is even more difficult for ordinary bandits to unlock.

By the way, as a conventional locking device for a motorcycle, a U-shaped device including a lock body and a U-shaped locking rod is used. Then, one notch is formed at each end of the lock rod, the both ends of the lock rod are inserted into the insertion holes of the lock body, and then the engaging member in the lock body is engaged with the notch of the lock rod. By doing so, the function of locking is achieved.

FIG. 8 is a side view of a main portion showing a locked state of the conventional U-shaped locking device for a motorcycle, which is locked by the engagement of the locking rod and the engaging member, and FIG. 9 is a sectional view taken along the line BB of FIG. FIG. In the figure, the lock rod 1B has one recess 51 on the side surface, and the steel ball 52 as an engaging member is fitted into the recess to lock the lock. The shaded area in FIG. 9 is the area in which the recessed portion 51 of the lock rod and the steel ball 52 overlap in the pull-out direction of the lock rod 1B.

FIG. 10 is a side view of a main part showing a locked state of the other conventional U-shaped locking device by the engagement of the locking rod and the engaging member, and FIG. 11 is a side view of FIG. It is a C line sectional view. In this example as well, the lock rod 1C has one recess 61 on the side surface, and the end of the engaging plate 62, which is an engaging member, fits into the recess to lock the lock. The hatched area in FIG. 11 is the area where the notch 61 and the engaging plate 62 overlap in the direction of removing the lock rod.

[0007]

[Problems to be solved by the device]

 Usually, when trying to unlock the locking device illegally, in most cases, a tool is used to pull or strike the locking rod of the U-shaped locking device in the axial direction with a strong force to lock the locking rod by the engaging member. The method of breaking the engaged state and separating the lock rod from the lock body is adopted. In the U-shaped lock device, the size of the overlapping area of the lock rod and the engaging member in the pull-out direction determines the anti-pull-out strength. However, in the conventional locking device, as shown by the shaded areas in FIG. 9 and FIG. 11, the overlapping area is relatively small on only one side of the locking rod, and the overlapping area is relatively small, so the pull-out resistance is insufficient. Therefore, there was still a problem in the ability to prevent the lock device from being destroyed and to prevent unauthorized unlocking.

[0008] Thus, the present invention has an object of providing a lock device which is superior in anti-pullout strength as compared with the conventional one, and which can effectively prevent destruction by a crushing means such as hitting and unauthorized unlocking. . Another object of the present invention is to provide a U-shaped locking device for a motorcycle, which has a simple structure, is easy to assemble, and can perform a reliable locking operation.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, a lock device according to the present invention comprises a lock body and a substantially U-shaped lock rod, and the lock body has a box-shaped case and a rectangular parallelepiped shape fitted to the case. It has a block and a pair of engagement plates slidably provided between the upper surface of the case and the upper surface of the block. The case has insertion holes into which the leg portions of the locking rod are inserted on both left and right sides of the upper surface. The block has a hole at the center of the lower surface, and the block has vertical recesses at both ends in the longitudinal direction that are aligned with the insertion holes of the case and open in the insertion hole direction. A spring for biasing in the insertion hole direction is housed in the vertical recess, and a cap-type spring seat is fitted on the upper end of the spring, and the block has a case at the center in the longitudinal direction. A circular hole that vertically penetrates in line with the hole in the center of the bottom surface of the The lock core rotor, which is rotated by a key and is inserted into the hole at the center of the lower surface of the case, is rotatably and undetachably held in the circular hole. Each of the engaging parts has an engaging part and the actuated part in the central part, and is formed in a substantially E shape, and each engaging part has an arcuate notch opening in the same direction along the longitudinal direction. The pair of engaging plates are adjacent to each other with their front and rear and left and right directions being opposite to each other, and the engaging portions on the same side are opposed to each other with their notches facing each other, and are held by the block. The engaging portions are urged toward each other by an urging member, and the lock core rotor has an operating portion projecting between the operated portions of the engaging plates at the upper end, and the locking core rotor is unidirectional. When it is rotated up to a predetermined angle, the operating part When the engaging plate is moved against the urging force of the urging member to separate the adjacent engaging portions by a distance larger than the diameter of the lock rod, and when the engaging plate is rotated in the other direction to a predetermined angle, The pair of engagement plates are moved by the biasing force of the biasing member in a direction in which the engagement portions are brought closer to each other, and the lock rod is opened to the outer periphery of the leg portions at both ends to form a pair of the lock body. Is characterized by having an annular groove with which the adjacent engaging portions of the engaging plate can be engaged.

[0010]

[Action]

 In a state where the leg portion of the lock rod is not inserted into the insertion hole of the lock body, the pair of engagement plates of the lock body are urged by the urging member in the direction in which the adjacent engagement portions approach each other. When the leg of the lock rod is inserted into the insertion hole of the lock body, the spring in the vertical recess of the block is compressed, and the tip of the leg causes the engaging plate to resist the biasing member, and They are moved away from each other. Further, when the adjacent engaging portions of the engaging plates are inserted to a predetermined position corresponding to the annular groove of the leg portion of the lock rod, the pair of engaging plates are moved toward each other by the urging force of the urging member. The engaging portion fits in the annular groove. As a result, the locked state is achieved. Next, when a predetermined key is inserted into the lock core rotor and rotated in a predetermined direction, the pair of engagement plates are moved away from each other through the operating portion of the rotor and the operated portion of the engagement plate, and the space between the engagement portions is moved. Since the distance between the lock rods is increased, the lock rod is pushed out of the insertion hole by the elastic force of the spring in the vertical recess. As a result, it is unlocked. When the key is rotated to the original angle, the pair of engagement plates are returned to their original positions.

[0011]

【Example】

 Next, the present invention will be described with reference to the drawings for a preferred embodiment. 1 to 4 are drawings showing an embodiment in which the present invention is applied to a U-shaped lock device for a motorcycle, FIG. 1 is an exploded perspective view, and FIG. 2 is a longitudinal sectional view of a main part in a locked state. 3 is a sectional view taken along line XX of FIG. 2, and FIG. 4 is a sectional view taken along line XX of FIG. 2 in the unlocked state.

As shown in FIGS. 1 and 2, the U-shaped locking device for otobi according to the present embodiment generally comprises a U-shaped locking rod 1 and a lock main body 2.

The lock rod 1 has legs 10 at both ends, and an annular groove 11 centered on the axis of the lock rod is formed on the outer periphery of each leg. The lock rod 1 is used for inserting the leg portion 10 into the lock main body 2 and engaging with an engaging member described later to lock.

The lock body 2 has a case 3, a block 4, and a pair of engagement plates 44, 44 ′. The case 3 is formed in a box shape having an opening on only one side surface, has insertion holes 31 penetrating upward from the inside on both left and right sides of the upper surface, and has a bottom portion at the center of the bottom. It has a circular hole 32 penetrating therethrough.

The block 4 has a shape such that one rectangular side plate is fixed to the side surface of one rectangular parallelepiped iron ingot, and the iron ingot is fitted into the hollow portion of the case 3 to form a side plate. Is fixed to the end surface of the opening of the case. The block 4 has one vertical cylindrical hole 41 at the center thereof, which coincides with the circular hole 32 of the case 3 and penetrates in the vertical direction. The lock core rotor 411 is pulled out into the cylindrical hole 41. Impossible and rotatably inserted. The lock core rotor 411 has an actuating portion 412 at the upper part, which is cut off on both left and right sides and has a rectangular cross section. When the rotor 411 is inserted to the predetermined position of the cylindrical hole 41 of the block, the operating portion 412 projects slightly above the upper surface of the block 4. The lock rotor 411 is attached to the case 3 in a non-removable manner, and in FIG. 1, a predetermined key is inserted from below the circular hole 32 and the key is rotated to rotate the lock rotor 411. The data 411 can be rotated. Instead of cutting the lock core rotor, the actuating portion 412 may be configured by penetrating a pin having a diameter larger than the rotor through the upper end portion of the rotor.

Between the cylindrical hole 41 of the block 4 and the left and right ends of the block, there are relatively shallow horizontal recesses 42 and 42 ′ that open to the upper surface, and relatively deep cylindrical vertical recesses 43 and 43 that open to the upper surface. ′ Are formed symmetrically with respect to the cylindrical hole 41. Horizontal recesses 42, 42 'accommodate springs 421, 421' that expand and contract in the horizontal direction, and vertical recesses 43, 43 'accommodate springs 431, 431' that expand and contract in the vertical direction. ing. Cap-type spring seats 432, 432 'are fitted on the upper ends of the springs 431, 431'. The spring seats can be raised and lowered in the vertical recesses 43 and 43 ', respectively.

Between the upper surface of the case 3 and the flat upper surface of the block 4, a pair of engagement plates 44 and 44 ′ are provided so as to be movable in the longitudinal direction. The two engaging plates 44 and 44 'are formed to have the same shape and size. Therefore, for the sake of simplicity of explanation, one of the engagement plates will be described, and the other will be indicated by attaching the same reference numeral with a dash added to the corresponding portion. The engaging plate 44 is formed in a substantially E shape, has an engaging portion 441 at one end, an arcuate notch 442 opening toward the other end at the engaging portion, and has a central portion at the center. It has a rectangular actuated portion 443, and also has one engaging portion 444 at the other end, which has an arcuate notch 445 that opens in the same direction as the notch 442. is doing.

Then, the pair of engagement plates 44, 44 ′ are in a state in which the left, right, front and rear directions are opposite to each other, and the corresponding notches 442, 445 ′, 442 ′, 445 are opposed to each other. The actuated parts 443 and 443 ′ are placed close to each other on the opposite sides of the cylindrical hole 41 and placed on the upper surface of the block 4. At this time, the operating portion 412 protruding from the upper end surface of the block 4 of the rotor 411 is present between the operated portions 443, 443 ', and the springs 421, 421' are respectively provided on one of the engaging plates. A pair of engagement plates 44, 44 'are present between the actuated portion and the engagement portion of the other engagement plate, that is, between 443 and 444' and between 443 'and 444. The portions 443, 443 'are biased toward each other, and the facing notches 442, 445', 442 ', 445 are biased toward each other.

The thickness of each engagement plate is set so that at least the thickness of each notch 442, 442 ′, 445, 445 ′ can fit into the annular groove 11 of the lock rod 1. .

With the above structure, when the leg 10 of the lock rod 1 is not inserted into the insertion hole 31 of the lock body 2 and a predetermined key is inserted into the rotor 411 and rotated in a predetermined direction, In the meantime, the rotor 411 moves the actuated portions 443, 443 'of the engaging plates 4, 44' on both sides in the direction of the actuating portion 412 in the direction away from each other against the springs 421, 421 '. The smaller diameter upper ends of the spring seats 432, 432 'move between the notches 442, 445', 442 ', 445 in a direction away from each other to increase the gap therebetween. To fit. FIG. 4 shows the state at this time.

Therefore, even after the key is inserted and rotated in the opposite direction to the original angle and removed from the rotor 411, the pair of engagement plates resist the biasing force of the springs 421 and 421 'by the spring seats. , Held in the position shown in FIG.

Next, when locking is performed using this U-shaped lock device, the legs 10 at both ends of the lock rod 1 are pushed into the insertion holes 31 of the lock body 2. As a result, the spring seats 432, 432 'of FIG. 4 are moved into the vertical recesses 43, 43' against the springs 431, 431 '. At this time, the leg portion 10 of the lock rod 1 is replaced with the upper end portion of the spring seat and enters between the notches 442, 445 ', 442', 445, and the springs 431, 431 'and the spring seats 432, 432 are inserted. When ′ moves to the limit position, the annular groove 11 of the lock rod 1 faces the notches 442, 445 ′, 442 ′, 445 of the pair of engaging plates, as shown in FIG. The pair of engagement plates 44, 44 'are moved by the biasing forces of 421, 421' in the direction of approaching each other of the training items 441, 445 ', 445, 441', as shown in FIGS. 2 and 3. As described above, the engaging portion of the engaging plate is fitted in the annular groove 11 from both sides thereof, and the locked state is achieved.

FIG. 5 is a cross-sectional view of essential parts showing a state in which the pair of engagement plates are engaged with the annular groove 11 of the lock rod 1. FIG. 6 is a sectional view taken along the line AA of FIG. The shaded area in FIG. 6 is the area where the lock rod 1 and the engaging members 44, 44 'overlap in the pull-out direction of the lock rod. As these figures clearly show, in the locking device according to the present embodiment, the locking members engage with the engaging members on both sides of the locking rod 1, and the overlapping area is surely larger than the conventional one. Therefore, the breaking resistance of the engaging portion between the locking rod and the engaging member of this locking device is remarkably large, and the pull-out resistance is more than twice that of the conventional product.

The drawings of FIGS. 1 to 4 merely show shapes for convenience of clearly showing the configuration of the present embodiment, and practically any appearance and shape suitable for practical use are adopted. FIG. 7 shows an example thereof. That is, a U-shaped round bar is used for the lock rod 1, and both ends of the lock body 2 are rounded in consideration of user's safety and appearance of the product.

[0025]

[Effect of device]

 As described above, in the lock device according to the present invention, the pair of engagement members are engaged from the opposite sides with the annular groove formed in the leg portion of the lock rod inserted into the insertion hole of the lock body. Since it is locked, the pull-out strength of the lock rod is significantly increased compared to the conventional product, and it is possible to effectively prevent breakage and unauthorized unlocking.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the same embodiment device in a locked state.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a cross-sectional view of the device of the embodiment in an unlocked state.

FIG. 5 is a sectional view showing an engaging portion between a lock rod and an engaging plate.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a perspective view showing an example of the appearance of a finished product.

FIG. 8 is a side view of a main part showing an engaged state of a conventional locking rod and an engaging member.

9 is a sectional view taken along line BB of FIG.

FIG. 10 is a side view of the main part showing the engagement state of another conventional locking rod and the engagement member.

11 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Lock Rod 10 Leg 11 Ring Groove 2 Lock Main Body 3 Case 31 Lock Rod Insertion Hole 32 Rotor Insertion Circular Hole 4 Block 41 Rotor Storage Cylindrical Hole 411 Lock Core Rotor 412 Actuator 42, 42 'Horizontal Recess 421, 421' Spring 43, 43 'Vertical recess 431, 431' Spring 432, 432 'Spring seat 44, 44' Engagement plate 441, 441 ', 444, 444' Engagement part 442, 442 ', 445, 445' Notch 443, 443 ' Operated part

Claims (1)

[Scope of utility model registration request] 1. A lock main body and a substantially U-shaped lock rod, wherein the lock main body includes a box-shaped case, a rectangular parallelepiped block fitted in the case, an upper surface of the case and the block. And a pair of engaging plates slidably provided between the case and the upper surface of the case, the case has insertion holes into which the leg portions of the lock rod are inserted on both left and right sides of the upper surface, and a hole is formed in the center of the lower surface. The block has vertical recesses at both ends in the longitudinal direction of the block that are aligned with the insertion holes of the case and open to the upper surface, and urges the vertical recesses vertically upward. A spring is housed, and a cap-type spring seat is fitted to the upper end of the spring, and the block is aligned with the hole at the center of the lower surface of the case at the center in the longitudinal direction. Has a circular hole penetrating in the vertical direction, and the cable is placed in the circular hole. A lock core rotor rotated by a key inserted through a hole in the center of the lower surface of the pair of lock plates is non-detachable and rotatably held. Each engaging portion is formed in a substantially E shape, and each engaging portion is provided with an arcuate cutout opening in the same direction along the longitudinal direction. The plywoods are adjacent to each other with the front, rear, left, and right directions being opposite to each other, and the engagement portions on the same side face each other with their notches facing each other, and the engagement portions approach each other by a spring held by the block. The lock core rotor has an operating portion projecting between the operated portions of the engaging plate at the upper end, and when the lock core rotor is rotated to a predetermined angle in one direction, the operating portion is The pair of engaging plates are urged by the spring through the actuated portion. By moving the adjoining engaging portions apart from each other by a distance larger than the diameter of the small diameter portion of the spring seat and being rotated to a predetermined angle in the other direction by the biasing force of the spring. A pair of engagement plates are moved in a direction to bring the engagement parts closer to each other, the lock rod is opened to the outer periphery on the leg portions at both ends, and the adjacent engagement portions of the pair of engagement plates of the lock body are A locking device having an annular groove that can be engaged.