JPH0828123A - Horseshoe lock - Google Patents

Abstract

PURPOSE:To accomplish improvement in operability, simplification of a structure, and prevention of error operation by dispensing with an operation lever and operating each of locking operation and unlocking operation only by means of key operation. CONSTITUTION:A latch 30 is supported reciprocatably along a circular guide part 21 in a lock case 20. A gearing part 32 in the latch 30 is geared with a driving gear 50, and when a rotor 40 is rotated by key operation during locking, an operation member 70 in a driving mechanism 55 rotates the driving gear 50, so that the latch 30 is slid along the circular guide part 21. In this way, a latching part 31 is projected to an opening part, 23 in the circular guide part 21. In unlocking, the rotor 40 is rotated in the reverse direction by key operation, and a restriction releasing mechanism part 90 separates a claw plate 82 in a restricting mechanism part 80 from the driving gear 50 so as to release rotation restriction, and as a result, the latch 30 is slid in the reverse direction by spring force of a spring 60 so as to be returned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock for locking a vehicle such as a bicycle or a motorcycle, and in particular, the present invention has a horseshoe-shaped lock body as a whole, and an open / closed lancet at its opening. The present invention relates to a horseshoe tablet that is unlocked and locked by being locked.

[0002]

2. Description of the Related Art In this conventional horseshoe lock, as shown in FIG. 8, an arc-shaped bolt 4 is reciprocally provided inside an annular guide portion 2 of a lock case 1, and the guide portion 2 is provided. It has a structure in which a lock mechanism is incorporated inside the mechanism accommodating portion 3 provided adjacent to the. The annular guide portion 2
An opening 5 having an opening width corresponding to the width of the wheel is provided in the middle of the wheel. The locking and locking of the wheel is performed by operating the tip of the latch 4 with respect to the opening 5 from one open end 5A. Unlock. An arc groove 6 is formed in the annular guide portion 2, and an operation lever 7 integral with the latch 4 projects on the arc groove 6. The mechanism housing 3
A key hole for inserting and removing the key 8 for operating the lock mechanism is provided at an end portion of the. The key 8 is held inserted into the keyhole when unlocked, and can be removed from the keyhole when locked. The horseshoe lock is mounted and fixed to the vehicle body by a holder (not shown) so as to straddle the wheels.

When the operating lever 7 is operated along the arcuate groove 6 for locking, the bar 4 slides in the annular guide portion 2 and its tip projects from the open end 5A to the open part 5 and the spokes of the wheel. Penetrate through. The annular guide portion 2 has a predetermined depth from the open end 5B at which the tip of the bolt 4 is opposed.
Then, the lock mechanism operates to lock the latch 4 in that state, and the key 8 can be removed from the keyhole. When unlocking, when the key 8 is inserted into the key hole of the mechanism accommodating portion 3 and operated, the lock mechanism is released to release the lock 4 from the restrained state, whereby the lock 4
Performs a return operation due to the spring force of a spring (not shown), and the distal end portion retreats inside the open end 5A to open the open portion 5.

[0004]

However, in this type of horseshoe lock, an arc groove 6 is formed in the annular guide portion 2,
Since it is necessary to provide the operation lever 7 for locking operation, the external structure becomes complicated, and the assembly and adjustment are troublesome, and the manufacturing cost of the horseshoe lock is high. In locking, a two-stage operation of operating the operation lever 7 and then removing the key 8 from the keyhole is necessary, and the operation is complicated. Moreover, since it is necessary to operate the operation lever 7 over the entire length of the arc groove 6 within the narrow mounting space of the horseshoe lock, there is a problem that the operation is difficult to perform. Further, when unlocked, if an object collides with the operation lever 7 and a pressing force acts,
The latch 4 may project to the opening 5, which is extremely dangerous. In order to prevent this malfunction, there is a system in which the lock 4 is set to the locked state in the unlocked state, and when the key 8 is inserted and operated, the lock of the lock 4 is released to enable the lever operation. In the case of this system, when locking the lock, it is necessary to perform a three-step operation of releasing the restraint of the operating lever 7, operating the operating lever 7, and removing the key 8, which further complicates the operation.

The present invention has been made in view of the above-mentioned problems. The operation lever is eliminated, and unlocking and locking operations can be performed only by key operation, thereby improving operability.
It is an object of the present invention to provide a horseshoe lock having a simplified structure and preventing malfunction.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a lock body,
A lock for fixing the lock body to the vehicle body with the lock body facing the wheels, wherein the lock body is
It has a lock case and a bolt. The lock case includes an annular guide portion having an open portion in the middle, and a mechanism accommodating portion provided adjacent to the annular guide portion. The boot is reciprocally supported along an annular guide portion of the lock case, and a hooking portion is formed on the distal end side to reciprocate in the open portion of the annular guide portion. A meshing portion including a plurality of teeth is formed. Further, the lock main body is in a state of being engaged with a rotor rotatably supported by an opening formed in the mechanism accommodating portion of the lock case, and a meshing portion of the bolt inside the mechanism accommodating portion of the lock case. And a drive gear that can be rotated in the reverse direction, and a drive gear drive mechanism that is provided inside the mechanism housing portion of the lock case so as to be interposed between the rotor and the drive gear. The rotor has a keyhole, and a lock mechanism that operates by inserting and removing a key into and from the keyhole is incorporated therein.

In the horseshoe lock according to a second aspect of the present invention, the drive mechanism includes a locking mechanism portion for rotating the drive gear in the locking direction in response to the rotation of the rotor in the locking direction, and the bolt. A spring that urges in the unlocking direction, a restriction mechanism that allows the drive gear to rotate in the locking direction and restricts the rotation in the unlocking direction, and responds to the rotation of the rotor in the unlocking direction. Then, a regulation releasing mechanism portion for releasing the regulating operation of the regulating mechanism portion is included.

[0008]

When the rotor is rotated by the key operation during locking, the drive mechanism rotates the drive gear. The wheel meshing with the drive gear slides on the annular guide portion by the rotation of the drive gear, and the hooking portion projects to the open portion and is closed. When unlocked,
When the rotor is rotated in the reverse direction by the key operation, the drive mechanism rotates the drive gear in the reverse direction. The wheel meshing with the drive gear slides on the annular guide portion by the rotation of the drive gear in the opposite direction, and the latch portion retreats from the opening portion and opens.

In the horseshoe lock according to the second aspect, when the rotor is rotated in the locking direction by a key operation during locking, the locking mechanism section rotates the drive gear in the locking direction in response to this. At this time, the spring force of the spring acts on the bolt, but since the restricting mechanism portion restricts the rotation of the drive gear in the unlocking direction, the spring force does not cause the bolt to return. At the time of unlocking, when the rotor is rotated in the unlocking direction by a key operation, the regulation release mechanism releases the regulation operation of the regulation mechanism in response to the rotation. As a result, the drive gear is released from the restriction of rotation in the unlocking direction and is free to rotate, so that the spring force of the spring causes the bolt to slide in the opposite direction and return.

[0010]

FIG. 1 shows a state in which a horseshoe lock according to the present invention is mounted on a bicycle. This horseshoe lock comprises a lock body 10 and a holder 11, and the lock body 10 is
The holder 11 is attached and fixed to the two rear forks 14, 14 of the bicycle in such a manner as to straddle the five. The holder 11 is formed by attaching metal fittings 12 to both sides of the rear surface of the lock body 10, and the horseshoe lock is fixed to the vehicle body by fitting the metal fittings 12 in the rear forks 14 and tightening the screws 13. In the drawing, reference numeral 16 denotes a spoke of the rear wheel 15, and a latch 30 described later penetrates between the spokes 16 by its protruding operation.

FIG. 2 shows the appearance of the horseshoe lock described above.
In the figure, the lock body 10 and one metal fitting 12 constituting the holder 11 are shown. The lock body 10
Has a flat horseshoe shape as a whole, and the lock case 20 constituting the outer wall includes an annular guide portion 21 and a mechanism accommodating portion 22. The mechanism accommodating portion 22 is integrally formed adjacent to the annular guide portion 21, and as shown in FIGS. 2 and 3,
The surface slightly projects from the annular guide portion 21.

Inside the annular guide portion 21, an arc-shaped bolt 30 is reciprocally provided. The annular guide portion 21 is provided with an opening portion 23 having an opening width corresponding to the width of the rear wheel 15 in the middle, and the tip end portion of the bolt 30 projects from one open end 23A and is annular from the other open end 23B. Enter into the guide portion 21.

An opening 24 is formed on the surface of the mechanism accommodating portion 22.
And a cylindrical case 27 supported by the opening 24.
The rotor 40 is supported therein so as to freely rotate in the forward and reverse directions. A key hole 41 into which a key 42 can be inserted and removed is provided on an end surface of the rotor 40.

FIGS. 4 and 5 show the internal structure of the lock body 10. FIG. 4 shows the locked state and FIG. 5 shows the unlocked state. The hook 30 has a half length on the front end side as a hook portion 31, and a half length on the base end side as a meshing portion 32. The meshing portion 32 is formed by forming a plurality of sawtooth-shaped teeth 33 on the outer peripheral edge of the hollow 30. The hooking portion 31 moves the open end 23 by the reciprocating motion of the bar 30.
A goes into and out of the open portion 23 from A, and enters and escapes into the annular guide portion 21 from the other open end 23B. Inside the annular guide portion 21 and at a position inside the opening end 23B, a stopper 25 for restricting the depth of entry of the latching portion 31 is projected.

A drive gear 50 is provided inside the mechanism accommodating portion 22 in a state in which it meshes with a meshing portion 32 of the hollow 31 and a drive mechanism 55 for driving the drive gear 50 is provided with the rotor 40 and the drive gear. It is arranged by interposing between 50 and 50.

As shown in FIG. 7, the rotor 40 has a plurality of disc accommodating grooves 43 formed therein so as to be orthogonal to the key hole 41. In each disc housing groove 43, a disc 44 having a key insertion hole on the plate surface and each disc 4
4 are loaded with coil springs (not shown) for urging them outward, respectively, to form a lock mechanism, while a disc housing groove is formed on the inner surface of the cylindrical case 27 that supports the rotor 40 so as to freely rotate in the forward and reverse directions. An engagement groove 26 that engages with and disengages from the disc 44 protruding from 43 is formed.

FIG. 7 (1) shows a locked state, in which each disk 44 of the rotor 40 is biased by a coil spring to project from the disk accommodating groove 43, and the cylindrical case 27
Is engaged with the engagement groove 26. FIG. 7B shows the rotor 4
The state where the key 42 is inserted into the key hole 41 of No. 0 is shown. Each disk 44 of the rotor 40 retreats into the disk accommodating groove 43 and is disengaged from the engaging groove 43 of the cylindrical case 27, so that the rotor 40 It is in a state of being rotatable with respect to the tubular case 27. FIG. 7C shows the unlocked state when the key 42 is rotated by a predetermined angle. In this state, the opening position of the disc accommodating groove 43 of the rotor 40 is set to the engagement groove 26 of the cylindrical case 27.
, Each disk 44 is prevented from protruding by the inner surface of the cylindrical case 27, and it is difficult to remove the key 42.

The cylindrical case 27, as shown in FIG.
The lock case 20 includes a flange 28 fixed to the periphery of the opening 24 of the lock case 20, and a sleeve 29 that supports the drive gear 50 so that the drive gear 50 can rotate forward and backward. The rotor 40 protrudes from the opening end of the sleeve 29, and a cam plate 96 forming a restriction releasing mechanism 90 described later is rotatably supported on the protruding portion and a groove formed on the protruding end surface. An actuating member 70 that rotates together with the rotor 40 is fitted into the shaft 45.

The drive gear 50 has a plurality of teeth 51 arranged in a row on the outer peripheral surface thereof for meshing with the meshing portions 32 of the bolt 30, and the protrusions 5 engaging with the actuating member 70 at appropriate positions on the plate surface.
2 is projected. The protrusion 52 constitutes a locking mechanism portion 53 for rotating the drive gear 50 in the locking direction a.

The drive mechanism 55 for driving the drive gear 50 in the forward and reverse directions includes the operating member 70 and the locking mechanism portion 61.
The coil spring 60, the restriction mechanism section 80, and the restriction release mechanism section 90 described above. The coil spring 60 is stretched between a rear end portion of the hollow 30 and a projection 61 projecting inside the annular guide portion 21.
0 is urged in the unlocking direction.

The restriction mechanism 80 is for permitting rotation of the drive gear 50 in the locking direction a and restricts rotation in the unlocking direction b, and a pin 81 is provided inside the lock case 20. The nail plate 82 is projected and supports the nail plate 82 by the pin 81.
A spring (not shown) is connected to the pawl plate 82 and urges it so that the tip of the claw plate engages with the tooth 51 of the drive gear 50 obliquely from above.

The regulation releasing mechanism 90 is provided with the operating member 7
0 is for releasing the restricting operation of the restricting mechanism portion 80, and the cam plate 91 has an engaging projection 92 that engages with the operating member 70, and the engaging projection 92 has an operating member. 70
When pressed against the pressing member 93, the pressing piece 93 protrudes in the direction of the restricting mechanism portion 80 and separates the claw plate 82 from the drive gear 50.
It has and.

Next, the operation of the horseshoe lock having the above structure will be described. In the unlocked state, the key 42 is inserted into the key hole 41 of the rotor 40, the hooking portion 31 of the yoke 30 is retracted inside the annular guide portion 21, and the opening portion 23 is opened.

At the time of locking, when the key 42 is rotated in the locking direction, the rotor 40 is rotated and the operating member 70 is integrally rotated. At this time, the actuating member 70 is the protrusion 5 of the drive gear 50.
2 is hooked to rotate the drive gear 50 in the locking direction a. Since the drive gear 50 meshes with the meshing portion 32 of the bolt 30, the bolt 30 slides on the annular guide portion 21 by the rotation of the drive gear 50, and the hooking portion 31 projects from the open end 23A to the open portion 23. , Further open end 23B
Further, it enters the annular guide portion 21, and the opening portion 23 is closed. Although the spring force of the spring 60 always acts on the bolt 30, the claw plate 82 of the restriction mechanism 80 engages with the teeth 51 of the drive gear 50 to rotate the drive gear 50 in the unlocking direction b. Since it is regulated, even if the turning force of the key 42 is released, the spring 30 does not cause the bolt 30 to return. When the key operation is performed until the tip of the hooking portion 31 of the bolt 30 comes into contact with the stopper 25 in the annular guide portion 21, each disk 44 of the rotor 40 reaches the same angular position as the engaging groove 43 of the cylindrical case 27 and faces each other. In order to operate the key 42,
Can be extracted more.

Next, when unlocking, when the key 42 is inserted into the key hole 41 and is rotated in the unlocking direction, the operating member 70 is rotated integrally with the rotor 40. During this rotation, the operating member 7
0 abuts on the engaging projection 92 of the cam plate 91 and presses it. By this pressing, the cam plate 91 follows the actuating member 70, and the pressing piece 92 of the cam plate 91 projects toward the regulating mechanism portion 80 to push the pawl plate 82 and separate it from the drive gear 50. As a result, the restriction of the rotation of the drive gear 50 in the unlocking direction b is released, and the spring force of the spring 60 causes the bolt 30 to slide in the annular guide portion 21 in the opposite direction to return to the opening portion 23. Is released.

[0026]

As described above, according to the present invention, the lock lever is reciprocated only by the key operation to perform the locking and unlocking, so that the structure of the conventional operation lever is not required.
The external structure is simplified and the operability is improved.
Moreover, there is no risk of malfunction due to collision with an object, and safety is improved. According to the second aspect of the invention, the spring force of the spring is operated to the unlocking operation by operating the bolt.
The unlocking operation can be performed easily and quickly.

[Brief description of drawings]

FIG. 1 is a front view showing a state where a horseshoe lock according to the present invention is attached to a bicycle.

FIG. 2 is a perspective view showing the external appearance of a horseshoe lock according to the present invention.

FIG. 3 is a front view of a lock body.

FIG. 4 is a plan view showing the internal structure of the lock body.

FIG. 5 is a plan view showing the internal structure of the lock body.

FIG. 6 is an exploded perspective view showing a rotor, a drive gear, and respective components of a drive mechanism.

FIG. 7 is an explanatory diagram showing the structure and operation of a rotor.

FIG. 8 is a plan view showing a conventional horseshoe lock.

[Explanation of symbols]

 10 lock body 11 holder 20 lock case 21 annular guide part 22 mechanism accommodating part 24 opening part 30 skyscraper 31 hooking part 32 meshing part 40 rotor 41 keyhole 42 key 50 drive gear 53 locking mechanism part 55 drive mechanism 60 spring 70 operation Member 80 Control mechanism 90 Control release mechanism

Claims (2)

[Claims] 1. A horseshoe lock comprising a lock body and a holder for fixing the lock body to a vehicle body with the lock body facing a wheel, wherein the lock body has an annular guide portion having an opening in the middle. And a lock case having a mechanism accommodating portion provided adjacent to the annular guide portion, and reciprocally supported along the annular guide portion of the lock case. A latch is formed at the open portion of the guide portion, and a latch having a meshing portion formed of a plurality of teeth is formed at the base end side. A rotor rotatably supported in a reverse rotation direction; a drive gear rotatable forward and reverse disposed in a mechanism housing portion of the lock case so as to mesh with the meshing portion of the latch; and a mechanism housing of the lock case. Inside the part between the rotor and the drive gear And a drive mechanism of a drive gear arranged so as to be interposed therebetween. The rotor has a key hole, and a lock mechanism that operates by inserting and removing a key into and from the key hole is incorporated in the horseshoe. Tablets. 2. The drive mechanism includes a locking mechanism portion that rotates the drive gear in the locking direction in response to rotation of the rotor in the locking direction, and a spring that urges the bolt in the unlocking direction. , A restricting mechanism portion that allows the drive gear to rotate in the locking direction and restricts the rotation in the unlocking direction, and a restricting operation of the restricting mechanism portion in response to the rotation of the rotor in the unlocking direction. The horseshoe lock according to claim 1, further comprising a restriction release mechanism section for releasing the restriction.