JPH09112108A - U-shaped theft preventive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an U-shaped theft preventive device which is capable of eliminating the drawbacks that prior art theft preventive devices suffer from and locking and unlocking without imposing a large load and being compact in size. SOLUTION: In an U-shaped theft preventive device which comprises an U-shaped lock lever 20 and a lock device 1 which engages a claw 5 with a lock hole 20a which the end of the lock lever 20 is inserted into and is provided on the lock lever 2, the U-shaped theft preventive device is provided with a lock device 12, a lock mechanism and a lock lever insertion hole 4b on the lock device 1 one by another on a straight line as viewed in the axial direction of the lock lever 20 where the lock mechanism is provided with the claw 5 engaged with the lock hole 20a provided on the lock lever 20 and a spring 8 constantly energized to the lock device 1. The lock device 12 pushes the lock mechanism against the spring force toward the lock lever insertion hole 4b and provided with a cam 12a which regulates the lock mechanism which engages the claw 5 with the lock hole 20a of the lock lever inserted into the lock lever insertion hole 4b.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a U-shaped lock rod,
The present invention relates to an improvement of a U-shaped antitheft device including a lock device that inserts an end of a lock rod and engages a claw with a lock hole provided in the lock rod to lock the lock rod so that the lock rod does not come off.

[0002]

2. Description of the Related Art Conventionally, a U-shaped lock rod and a lock device for inserting the end of the lock rod and engaging a pawl with a lock hole provided in the lock rod so as to prevent the lock rod from coming off. A U-shaped antitheft device consisting of is known, and is specifically described in Japanese Utility Model Publication No. 57-5.
Japanese Patent No. 5899 discloses a padlock which is a kind of the U-shaped anti-theft device having the above-mentioned configuration. This conventional padlock is composed of a locking rod bent into an inverted J-shaped lock and a substantially diamond-shaped main body having a vertically extending through hole and a receiving hole into which both ends of the locking rod can be inserted / removed. A core rod that rotates by key operation is stored vertically. Further, a sliding groove extending in the direction orthogonal to the mandrel toward the through hole and the receiving hole is formed in the main body, and a pair of claw pieces are housed back to back in the sliding groove. . Each of the pawls extends toward the corresponding locking rod so that the toe of one end can engage with the notch formed in the locking rod, and the other end extends beyond the cam provided on the mandrel to It is formed so as to engage with the side surface opposite to the corresponding lock rod, and is constantly urged by the spring toward the corresponding cam side. The conventional padlock, which is a kind of U-shaped anti-theft device configured as described above, inserts the lock rod into the through hole and the receiving hole, the pawl is pushed back against the force of the spring by the lock rod, and the lock is pushed. When the notch of the rod reaches the position corresponding to the claw piece, the claw piece again projects to the lock lever side by the force of the spring and engages with the notch of the corresponding lock rod to lock the lock rod, and the other end of the claw piece is Lock the cam on the mandrel on the side opposite to the corresponding lock rod. When unlocking the lock rod, rotate the mandrel by key operation,
The cam pushes back the pawl piece against the force of the spring, and removes the pawl piece from the notch of the lock rod to unlock the lock rod.

[0003]

In the conventional U-shaped anti-theft device constructed as described above, one end of the pawl piece is extended toward the corresponding lock rod, and the other end is provided at the center of the cam. Since it is configured to be extended beyond and to be locked to the side surface of the cam opposite to the corresponding locking rod, there is a disadvantage that the main body becomes thicker and larger around the cam. Further, since this conventional device is configured to remove the pawl piece from the lock rod by pushing the pawl with a cam in the direction in which the pawl comes off the lock rod, for example, when the lock is released, When a large load is applied between the lock rod and the pawl, the key must be turned so as to rotate the cam with a force larger than the load between the lock rod and the pawl. There is also a problem that the key or cam may be damaged when the load between them is large. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional drawbacks and provide a compact U-shaped antitheft device that can be locked and unlocked without imposing a heavy load on a key or a cam.

[0004]

In order to achieve the above-mentioned object, a U-shaped antitheft device of the present invention is a U-shaped lock rod and a lock provided on the lock rod by inserting the end of the lock rod. A U-shaped antitheft device comprising a locking device that locks a locking rod by engaging a pawl body with the hole, and a locking device, a locking mechanism, and a locking rod insertion hole are sequentially locked in the locking device. Provided on a straight line when viewed from the axial direction of the rod, the lock mechanism is
The locking device includes a pawl that engages with a lock hole provided in the locking rod, and a spring that constantly urges the locking mechanism toward the locking device, and the locking device resists the locking mechanism against the force of the spring. Characterized by being provided with a cam that pushes out toward the insertion hole side and engages a claw body with a lock hole of the lock rod inserted into the lock rod insertion hole to lock the lock rod so as to lock the lock rod Is. Also, preferably, the lock mechanism,
A pawl that engages with the lock rod, a housing that abuts against the cam,
A spring for pressing both the housing and the pawl at the same time toward the cam side and another spring for pressing the pawl toward the lock lever side are provided, and the cam of the locking device has a locking mechanism, and the pawl body locks the lock rod. When the spring and the biasing force of the spring are set so that the biasing force of the spring is larger than the biasing force of the other spring when the locking force is regulated to the unlocked position, the claw body is projected in the lock rod insertion hole. At this time, when the lock rod is inserted into the lock rod insertion hole, the lock rod pushes the pawl body to the cam side against the force of the other spring and enters the lock rod insertion hole, and the lock hole of the lock rod and the pawl body When the lock rod is inserted to the matching position, the pawl may be configured to project into the lock hole by the force of the additional spring to lock the lock rod.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A U-shaped theft prevention device according to the present invention will be described below with reference to an embodiment shown in the accompanying drawings. 1 is a schematic central longitudinal sectional view of a U-shaped antitheft device according to the present invention, FIG. 2A is a sectional view taken along the line AA of the U-shaped antitheft device shown in FIG. 1, and FIG. It is sectional drawing which cut | disconnected the U-shaped antitheft device along the BB line in FIG. 2 (a) and the surface in which the lock hole of the lock rod was formed.

As shown in the drawing, the U-shaped antitheft device comprises a U-shaped lock rod 20 and a lock device 1 for inserting and locking both ends of the lock rod 20. The lock device 1 includes a cover 2, an outer body 3, and an inner body 4 having a lock mechanism and a cylinder lock.
The cover 2 includes a resin upper shell 2a and a lower shell 2b,
After housing the outer body 3 inside, the mating surfaces of the upper shell 2a and the lower shell 2b are bonded (see FIG. 2B). The outer body 3 is formed into a substantially rectangular tube shape with both ends open, and the inner body 4 is inserted thereinto and integrated with the inner body 4 by the pin 3b, and then housed in the cover 2 as described above (see FIG. 1).

The inner body 4 is a rectangular parallelepiped having a size that can be inserted into the outer body 3, and has a cylinder lock housing hole 4a penetrating in the vertical direction at the center thereof.
Further, two lock rod insertion holes 4b penetrating in the up-down direction are formed at symmetrical positions centering on the cylinder lock storage hole 4a. Further, the inner body 4 is provided with a lock mechanism housing hole 4c penetrating in the left-right direction so as to traverse the cylinder hole 4a and the locking rod insertion hole 4b. It should be noted that through holes are formed in the bottom surfaces of the outer body 3 and the cover 2 at positions corresponding to the cylinder lock housing holes 4a, and the lock rod insertion holes on the upper surfaces of the outer body 3 and the cover 2 are formed. A through hole is also formed at a position corresponding to 4b.
a is opened downward in the assembled state, and the lock rod insertion hole 4
b is open upward in the assembled state. A cylinder lock 12 is stored in the cylinder lock storage hole 4a of the inner body 4. The cylinder lock 12 has an elliptical cam 1 at the tip.
2a, and this cam 12a regulates the housing 6 of the lock mechanism described later. A lock mechanism is housed on each side of the inner body 4 in the lock mechanism housing hole 4c sandwiching the cylinder lock 12. The lock mechanism includes a pawl body 5 and a housing 6, and the pawl body 5, the housing 6 and the cylinder lock 12 are arranged so as to be in series from the corresponding lock rod insertion hole 4b when viewed in the axial direction of the lock rod 20. ing. The claw body 5 is composed of a columnar body having a size that can be fitted into a lock hole 20a having a circular cross section formed inside the tip of the lock rod 20, and the end portion on the cylinder lock 12 side is expanded to a cylindrical shape. First to be extended and to be described later inside the cylindrical portion
It is configured to support one end of the spring 7.
The housing 6 is composed of a cylindrical body with one end closed, the enlarged diameter portion of the claw body 5 is inserted from the open end, and the closed end is regulated by the cam 12a of the cylinder lock 12. A first spring 7 is provided between the pawl body 5 and the housing 6, and the pawl body 5 is constantly urged in the locking direction (that is, the corresponding locking rod insertion hole 4b side) by the first spring 7. There is. An annular collar 9 is fixedly provided in a space formed between the outer surface of the claw body 5 and the inner surface of the lock mechanism housing hole 4c, and the open end surface of the housing 6 and the enlarged diameter of the claw body 5 are provided in the space. A washer 10 having a size that comes into contact with both the stepped portion formed by the portions is housed, and a second spring 8 is provided between the collar 9 and the washer 10. In the state shown in FIG. 3B, the second spring 8 is set so that the urging force thereof is larger than the urging force of the first spring 7. Therefore, the second spring 8 causes the pawl 5 and The housing 6 is constantly urged toward the cylinder lock 12 side and is regulated by the cam 12a of the cylinder lock 12.

Next, the lock rod 20 will be briefly described. The lock rod 20 is formed by bending a columnar body into a U-shaped lock, and both ends thereof are tapered so as to be tapered. Further, the above-mentioned lock holes 20a are formed inside the both ends, and the edges of the lock holes 20a are chamfered in a tapered shape so as to expand in diameter toward the outside.

The operation of the U-shaped anti-theft device constructed as described above will be described with reference to FIGS. 2 (a) and 3. FIG. 3A shows the lock device 1 before inserting the lock rod 20.
Shows the locking mechanism in. As shown in the drawing,
In this state, the cam 12a of the cylinder lock 12 regulates the housing 6 against the force of the second spring 8 while pushing the housing 6 toward the lock rod insertion hole 4b side at both ends thereof, and the pawl body 5 is controlled by the first spring 7a. Is pushed toward the lock lever insertion hole 4b side to a position regulated by the washer 10 by the force of, and its tip projects into the lock rod insertion hole 4b. When the lock rod 20 is inserted into the lock rod insertion hole 4b from the state of FIG. 3 (a), the tapered surface of the end of the lock rod 20 abuts the pawl 5 to move the pawl 5 to the first position. It gradually pushes into the housing 6 against the force of the spring 7 and enters the lock lever insertion hole 4b. When the lock rod 20 reaches the bottom of the lock rod insertion hole 4b, the lock hole 20a of the lock rod 20 is aligned with the position of the pawl 5, and the pawl 5 is released from the regulation by the lock rod 20 and the first spring 7 moves. By force, the lock rod 20 is projected into the lock hole 20a to lock the lock rod 20 so as not to come out of the lock rod insertion hole 4b, and the automatic lock of the lock rod 20 is completed (see FIG. 2A). Further, when the cylinder lock 12 is rotated by using a key (not shown) from the state of FIG. 2A and the cam 12a is rotated by about 90 degrees, the housing 6
Is slid by the force of the second spring 8 until the regulation by the end of the cam 12a is released and the closed end of the housing 6 comes into contact with the side surface of the cam 12a. At this time, the washer 10 pushes the housing 6 together with the claw body 5 toward the cam 12a side, and the claw body 5 is disengaged from the lock hole 20a of the lock rod 20 to unlock the lock rod 20 and the state shown in FIG. It becomes the state shown.
When the lock rod 20 is pulled up while keeping the state shown in FIG. 3B with the key, the lock rod 20 is disengaged from the lock device 1 and the locked state is released. The cylinder lock 12 is shown in FIG.
The key is not removed unless the cam 12a is rotated 90 degrees again from the state shown in Fig. 3 to return the cam 12a to the state shown in Fig. 3 (a), or the key is removed in the state shown in Fig. 3 (b). When the cylinder lock 12 is pulled out, the cam 12a automatically rotates 90 degrees by the force of the return spring, etc.
It may be configured to return to the state shown in (a).

The U-shaped anti-theft device constructed as described above is used to lock a wheel by attaching it to a wheel when a vehicle, for example, a motorcycle is parked, or a part of the vehicle body. It can be used to connect with a fixed object on the ground to prevent theft.

In the embodiment described above, the claws are engaged with both ends of the U-shaped bent lock rod to lock the lock rod. The structure of the type anti-theft device is not limited to this embodiment, and the lock rod may be locked, for example, by engaging the pawl only at one end of the lock rod.

[0012]

According to the U-shaped antitheft device of the present invention described above, since the lock device is provided with the lock device, the lock mechanism, and the lock rod insertion hole in a straight line in order, the lock device is similar to the conventional device. The effect that the lock device itself can be made thin and compact because there is no portion where the cam and the lock mechanism overlap with each other. Further, the U-shaped antitheft device of the present invention is
The lock mechanism includes a pawl that engages with a lock hole provided in the lock rod, and a spring that constantly urges the lock mechanism toward the lock device, and the lock device causes the lock mechanism to move by the force of the spring. It is equipped with a cam that controls the lock mechanism so as to lock the lock rod by pushing the lock rod into the lock rod insertion hole side in order to lock the lock rod by engaging the pawl body with the lock hole of the lock rod inserted in the lock rod insertion hole. , By only operating the cam of the lock device to release the restriction of the lock mechanism, the lock mechanism can be pushed back to the lock device side by the force of the spring, the pawl body can be released from the lock rod, and the lock can be released. The cam (key) can be rotated regardless of the positional relationship between the lock rod, the pawl, and the housing. For example, when a large load is applied between the lock rod and the pawl when unlocking, After releasing the lock mechanism restriction by rotating the cam Eliminate the cause of the load applied to between the rod and the pawl, the locking mechanism by the force of the spring can be unlocked by pushing back the cam side, an effect that is not in accordance large load on the cam or key. Further, the lock mechanism includes a pawl that engages with the lock rod, a housing that abuts against the cam, a spring that presses both the housing and the pawl at the same time on the cam side, and a pawl that pushes the pawl toward the lock bar. If the force of the spring is set to be larger than the force of the other spring and the pawl is inserted into the lock rod insertion hole and the lock rod is inserted into the lock rod insertion hole, When the rod pushes the claw body against the force of the other spring and pushes it toward the cam side, it enters the lock rod insertion hole, and when the lock rod is inserted to the position where the lock hole of the lock rod and the claw body are inserted, the claw body is inserted. When the lock lever is configured to project into the lock hole by the force of the other spring to lock the lock rod, the lock rod can be automatically locked, and the locking operation is very simple.

[Brief description of the drawings]

FIG. 1 is a schematic center vertical cross-sectional view of a lock device according to the present invention.

2A is a cross-sectional view taken along the line AA of the lock device shown in FIG. 1, and FIG. 2B is a U-shaped antitheft device in which the line BB in FIG. It is sectional drawing cut | disconnected along the formed surface.

3 (a) and 3 (b) are cross-sectional views corresponding to FIG. 2 (a) showing the operation of the lock mechanism in the lock device shown in FIG.

[Explanation of symbols]

 1 Lock Device 2 Cover 2a Box-shaped Main Body 2b Lid Body 3 Outer Body 4 Inner Body 4a Cylinder Lock Storage Hole 4b Lock Rod Insertion Hole 4c Lock Mechanism Storage Hole 5 Claw 6 Housing 7 First Spring 8 Second Spring 9 Collar 10 Washer 11 pins 12 cylinder lock 12a cam body 20 lock rod 20a lock hole

Claims (2)

[Claims] 1. A U-shaped lock rod (20) and an end portion of the lock rod (20) are inserted so that a pawl (5) is engaged with a lock hole (20a) provided in the lock rod (20). Locking device that locks the lock rod (20) so that it does not come off
In the U-shaped anti-theft device consisting of (1), a lock device (12), a lock mechanism, and a lock rod insertion hole (4b) are sequentially viewed from the lock rod (1) in the axial direction of the lock rod (20). At the lock hole (20) provided on the lock rod (20).
The pawl (5) that engages with a) and the lock mechanism are constantly locked (12).
With a spring (8) biasing to the side, the lock device (12) pushes the lock mechanism against the force of the spring to the lock rod insertion hole (4b) side, and the lock rod insertion hole (4b). The lock rod (20) inserted into the lock hole (20a) is provided with a cam (12a) for restricting the lock mechanism so as to lock the lock rod (20) by engaging the pawl (5). U-shaped anti-theft device. 2. The locking mechanism has a pawl body (5) engaged with the lock rod (20), a housing (6) abutting against the cam (12a), the housing (6) and the pawl body (5). And both at the same time (12a)
A spring (8) that presses to the side and another spring (7) that presses the pawl (5) toward the lock rod (20), and the cam (12a) of the locking device (12) functions as a lock mechanism, When the pawl body (5) regulates the lock rod (20) to a position where it does not lock, the spring (8) is set so that the biasing force of the spring (8) is larger than the biasing force of the other spring (7). ) And (7), the lock rod (20) is inserted into the lock rod insertion hole (4b) when the pawl (5) is protruding into the lock rod insertion hole (4b). The rod (20) is the nail body
While pushing (5) against the force of the other spring (7) toward the cam (12a) side, it enters the lock rod insertion hole (4b), and the lock hole (20a) of the lock rod (20) becomes a claw body. When the locking rod (20) is inserted to the position matching with (5), the pawl (5) projects into the lock hole (20a) by the force of the above-mentioned spring (7) to lock the locking rod (20). The U-shaped antitheft device according to claim 1, wherein the U-shaped antitheft device is configured.