JP3343589B2 - Lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device, and more particularly to a lock device for inserting an insertion member into a member to be inserted and integrating the member to prevent the member from being pulled out.

[0002]

2. Description of the Related Art For example, in a motorcycle, a lock device is used to lock a wheel and a vehicle body with a chain-shaped cable to prevent the wheel from moving in order to prevent theft during parking. I have.

As an example of this lock device, there is a lock device having a rosary-chain structure as shown in FIG. This rosary-type chain 1 has a number of rosary-like pieces 3 inserted in a bendable wire rope 2 or the like in a row,
They are fitted to each other. An engaging hook 4 and a key housing 5 are respectively engaged and fixed to both ends of the wire rope 2.

FIG. 1 is an enlarged sectional view of an engagement hook 4 portion.
As shown in FIG. 0, an integrated caulking piece 6 and an end piece 7 which are caulked to the end of the wire rope 2 and inserted into the engaging hook 4, and the end piece 7 is a stopper such as a circlip 8 To prevent the engagement hook 4 from coming off.

[0005]

By the way, in order to ensure that the end piece 7 does not come off from the engaging hook 4, the outer diameter d1 of the end piece 7 must be larger than the engaging hook 4.
The average diameter d2 of the circlip 8 at the time of insertion, that is, the distance from the center to the center of the wire of the circlip 8 must be large.

In order to prevent rattling of the circlip 8 after the engagement hook 4 is inserted, generally, when the circlip 8 is free, that is, when the circlip 8 is not reduced in diameter, the average diameter of the circlip 8 at the time of insertion is reduced. It is even larger than the average diameter d2. Therefore, the end piece 7 is
When the circlip 8 is to be inserted into the opening 4, it is necessary to reduce the diameter of the circlip 8 by the guide inclined surface 4 b formed at the opening end 4 a of the engaging hook 4.

However, since a force acts to shift the circlip 8 from the clip groove 7a formed in the end piece 7 due to the insertion resistance, as shown in FIG. For example, it is necessary to insert the end piece 7 into the engagement hook 4 while reducing the diameter of the circlip 8, which makes assembly difficult.

Further, when the circlip 8 is previously fitted into the clip groove 7a, the circlip 8 is pushed open because the free inner diameter of the circlip 8 is slightly smaller than the outer diameter d1 of the end piece 7. However, it was necessary to fit the clip groove 7a, and the assembling work was difficult.

The present invention has been made in consideration of the above-described circumstances, and allows an insertion member to be easily inserted into an insertion target member without using a tool or the like, and to assemble a circlip into an insertion member in advance. An object of the present invention is to provide a lock device that can improve workability and can reliably prevent the insertion member from coming off.

[0010]

According to a first aspect of the present invention, there is provided a lock device comprising: an insertion member inserted into a member to be inserted;
In the lock device for preventing withdrawal, a clip groove into which a circlip is inserted is formed in the outer peripheral surface of the insertion member in a circumferential direction, and a plurality of protrusions project in the circumferential direction from the clip groove in a direction opposite to the insertion direction. On the other hand, the outer diameter of the insertion member is formed to be substantially the same as the inner diameter of the insertion opening of the inserted member, and the outer diameter of the projection is larger than the free-time average diameter of the circlip and the outer diameter of the insertion member at the tip end side in the insertion direction. A large-diameter, approximately the same diameter as the depth diameter of the locking groove provided on the inner periphery of the inserted member, and forming a plurality of engagement recesses capable of fitting the projections into the insertion opening of the inserted member. The inner diameter of the circlip when free is larger than the outer diameter of the insertion member.

According to another aspect of the present invention, there is provided a locking device according to the present invention.
The circular cross section of the circlip is formed, and the outer diameter of the insertion member at the distal end side in the insertion direction from the clip groove of the insertion member and the inner diameter of the insertion opening of the inserted member are smaller than the average diameter when the circlip is inserted into the inserted member. It is formed in.

[0012]

According to the first aspect of the present invention, when the insertion member is inserted into the inserted member, even if a force for shifting the circlip from the clip groove formed in the insertion member due to the insertion resistance acts, Since the projection presses the circlip in the insertion direction, there is no need to insert the insertion member into the insertion opening of the inserted member while reducing the diameter of the circlip with a sharp-pointed tool or the like, which facilitates insertion of the insertion member. Become.

In addition, since the inner diameter of the circlip when it is free is larger than the outer diameter of the insertion member, when the circlip is fitted in the clip groove in advance, it is necessary to fit the circlip in the clip groove while pushing and expanding the circlip. And its workability is very good.

According to the second aspect of the present invention, when a force for pulling out the insertion member inserted into the inserted member is applied, a force for expanding the circlip is generated. The diameter of the circlip is prevented from being reduced, and the insertion member is securely prevented from coming off.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall view of a lock device to which the present invention is applied.

This lock device is suitable for preventing theft of bicycles and motorcycles. For example, connecting the wheels to other parts of the vehicle in a loop to restrict the rotation of the wheels, or connecting a part of the wheels or the vehicle to a ground structure such as a telephone pole or a book to prevent the vehicle from moving. Also, the present invention is not limited to vehicles, and is suitable for preventing theft of articles that are locked by connecting objects in a loop.

As shown in FIG. 1, the lock device is constructed in a rosary chain structure. A rosary-type chain 10 serving as this lock device has a rosary-like shape composed of a large number of male pieces 12a and female pieces 12b on a bendable wire rope 11 (including a cable, a stranded wire rope, or the like) serving as a flexible core material. The pieces 12 are alternately inserted in a row, and the beads 12 are fitted to each other. A rosary piece in which a male piece and a female piece are integrated may be inserted in a row.

An engaging hook 13 and a key housing 14 are engaged with and fixed to both ends of the wire rope 11, respectively.

The engaging hook 13 has a tubular portion 15 as an inserted member and a spherical or other shaped lock portion 16 provided at the outer end thereof. The caulking piece 17 which is caulked to the end of 11 and the integrated caulking piece 17 and the end piece 18 which is an insertion member are inserted. Then, the end piece 18 is prevented from being removed from the tubular portion 15 by the circlip 19 serving as a stopper.

Here, the structure for preventing the end piece 18 from coming off will be described.

FIG. 2 is an enlarged view of the engagement hook 13.
3 is a sectional view taken along the arrow A in FIG. 2, and FIG. 4 is a sectional view taken along the line BB in FIG.

2, 3 and 4, a clip groove 20 is formed in the circumferential direction on the outer peripheral surface at the end in the X direction of insertion of the end piece 18 into the engaging hook 13. As shown in FIG. The depth of the clip groove 20 is set such that the outer peripheral surface of the circlip 19 does not protrude from the outer peripheral surface of the end piece 18 when the diameter of the circlip 19 is reduced (see FIG. 8C).

On the outer peripheral surface of the clip groove 20 in the direction Y in which the end piece 18 is inserted into the engagement hook 13, a plurality of projections 21 are provided, for example, at equal intervals in the circumferential direction. As shown in an enlarged view in FIG. 5, the outer diameter D1 of the protrusion 21 is an average diameter D2 when the circlip 19 is free, that is, the average diameter D2 when the circlip 19 is not reduced in diameter, that is, the center of the wire of the circlip 19. The diameter is larger than the distance from to the center.

On the other hand, the cylindrical portion 15 of the engagement hook 13
The guide inclined surface 24 of the circlip 19 is formed in the opening 23 of the insertion opening 22 in a tapered shape in the circumferential direction. The inclined surface 24 is formed with an engagement recess 25 into which the projection 21 of the end piece 18 can be fitted.

Further, a locking groove 26 of the circlip 19 is formed in the inner peripheral surface of the cylindrical portion 15 in the circumferential direction. As shown in FIG. 5, the depth diameter D3 of the locking groove 26 is smaller than the outer diameter D4 when the circlip 19 is free, and is substantially the same as the outer diameter D1 of the projection 21.

Furthermore, the inner diameter D5 of the cylindrical portion insertion port 22
The outer diameter D6 of the end piece 18 is smaller than the average diameter D7 of the circlip 19 locked in the locking groove 26, as shown in FIG. As is apparent from FIG. 5, the inner diameter of the circlip 19 at free time is set to be larger than the outer diameter D6 of the end piece 18.

A U-shaped or V-shaped clearance adjusting shim 27 is provided between the caulking piece 17 and the end piece 18.
As shown in FIG. 7, the adjustment shims 27 are used to prevent the beads 12 inserted through the wire rope 11 from loosening, thereby eliminating looseness of the beads 12.

In FIG. 1, an end piece 28 is integrally fixed to the other end of the wire rope 11 by caulking or welding, and this end piece 28 is attached to the key housing 1.
4 is engaged with the stepped portion of the storage hole 29 to prevent removal.

On the other hand, the key housing 14 has, for example, an insertion opening 30 on a side surface thereof into which the lock portion 16 of the engaging hook 13 is inserted.
A lock piece 31 that prevents and locks the pullout 6 is provided rotatably. When the lock piece 31 is rotated via a member 32 that is rotated by a key (not shown), the protrusion 31a of the lock piece 31 is engaged with the lower part of the neck of the lock portion 16 and locked so that it cannot be pulled out.

The beaded chain 10 is fitted with a covering tube 33 over substantially the entire length in the axial direction, and covers the beaded pieces 12 arranged in a row. The coating tube 33 is made of a material such as a flexible resin, and the clearance between the inner peripheral surface of the coating tube 33 and the rosary piece 12 is at least the thickness of the coating tube 33. The inner diameter of the covering tube 33 is smaller than the outer diameters of the engagement hook 13 and the key housing 14.

Next, the operation of this embodiment will be described.

The procedure for assembling the rosary-type chain 10 as a lock device is as follows. First, one end of the wire rope 11 is fixed to the end piece 28 by caulking or welding, and the end piece 28 is engaged with the step portion of the storage hole of the key housing 14. Next, the rosary-shaped pieces 12 composed of the male pieces 12a and the female pieces 12b are inserted alternately in a row into the wire rope 11, and finally the end pieces 18 are inserted. Then, the other end of the wire rope 11 is swaged by the swaging piece 17, and the bead-shaped piece 12 inserted through the wire rope 11 through the clearance adjusting shim 27 between the swaging piece 17 and the end piece 18.
The loosening of the beads 12 is prevented by preventing looseness between the beads.

Next, the circlip 19 serving as a stopper is disposed at the position of the clip groove 20 formed in the end piece 18, and the end piece 18 is inserted into the insertion opening 22 of the tubular portion 15. FIG. 8 shows the enlargement / reduction of the circlip 19 at this time.
(A), (b), (c) and (d).

FIG. 8A shows the state before the end piece 18 is inserted. At this time, the circlip 19 is free, and the outer diameter D1 of the projection 21 is larger than the average diameter D2 of the circlip 19, as shown in FIG.
Even if a force is applied to the circlip 19 from the insertion direction X, the circlip 19 does not come off.

FIG. 8B shows a state at the time when the insertion of the end piece 18 is started. At this time, while the circlip 19 is pressed in the insertion direction X by the projection 21, the circlip 19 comes into contact with the guide inclined surface 24 so that the
Reduce the diameter to 1. At this time, the circlip 1
Even if a force is applied to move the circlip 9 from the clip groove 29 formed in the end piece 18, the projection 21 presses the circlip 19 in the insertion direction X. End piece 1 while reducing the diameter
It is not necessary to insert 8 into the insertion opening 22 of the tubular portion 15, and the insertion becomes easy.

FIG. 8C shows the state where the end piece 18 is being inserted. At this time, the circlip 19 is most contracted by the inner wall of the insertion opening 22 of the tubular portion 15. The protrusion 21 is guided by the recess 25.

FIG. 8D shows a state where the insertion of the end piece 18 is completed. At this time, the circlip 19 is expanded and locked in the locking groove 26. Since the depth D3 of the locking groove 26 is smaller than the free outer diameter D4 of the circlip 19, the circlip 19 urges against the bottom of the locking groove 26 to abut, and the end piece 18 may come off. In addition, the circlip 19 after being inserted into the tubular portion 15 does not rattle. And
The protrusion 21 is fitted into the recess 25.

By the way, the end piece 18 inserted in the cylindrical portion 15 is attached to the end piece 1 as shown by an arrow in FIG.
When the force F2 for pulling out the cylindrical portion 8 is applied, the cylindrical portion insertion port 22 is
The inner diameter D5 of the end piece 18 and the outer diameter D6 of the end piece 18 are equal to the average diameter D7 of the circlip 19 locked in the locking groove 26.
Since the diameter of the circlip 19 is smaller, a force F3 in the expanding direction indicated by an arrow is generated in the circlip 19, thereby preventing the circlip 19 from being reduced in diameter. That is, the end piece 18 can be reliably prevented from coming off.

Further, since the inner diameter of the circlip 19 when it is free is set to be larger than the outer diameter D6 of the end piece 18, the circlip 19 is pushed out when the circlip 19 is fitted in the clip groove 20 in advance. However, there is no need to fit the circlip 19 into the clip groove 20, and the workability of assembling the circlip 19 is very good.

In the above-described embodiment, an example is shown in which the present invention is applied to a lock device having a rosary chain structure. However, not only a lock device having another configuration but also an insertion member is used as an inserted member. It can be applied to prevent the removal of any articles that are integrated by inserting them into a box.

[0042]

As described above, according to the lock device of the present invention, the insertion member can be easily inserted into the insertion member without using a tool or the like, and when the circlip is previously assembled to the insertion member. Can be improved, and the insertion member can be reliably prevented from coming off.

[Brief description of the drawings]

FIG. 1 is an overall view of a rosary-type chain showing an embodiment of a lock device according to the present invention.

FIG. 2 is an enlarged view of an engagement hook.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a sectional view taken along the line BB in FIG. 3;

FIG. 5 is an enlarged view of the vicinity of an insertion port showing a relationship between a protrusion and a circlip of a locking groove.

FIG. 6 is an enlarged view of the vicinity of an insertion opening showing a state in which a circlip is locked in a locking groove.

FIG. 7 is a sectional view taken along the line CC of FIG. 4;

FIGS. 8 (a), (b), (c) and (d) show the insertion before the insertion of the end piece, the start of the insertion of the end piece, the insertion of the end piece and the completion of the insertion of the end piece, respectively. An enlarged view near the mouth.

FIG. 9 is an overall view of an example of a conventional lock device.

FIG. 10 is an enlarged cross-sectional view of an engagement hook part of FIG. 9;

FIG. 11 is a diagram showing a conventional end piece insertion method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Beaded chain (locking device) 11 Wire rope 12 Beaded piece 13 Engagement hook 15 Cylindrical part (inserted member) 18, 28 End piece (inserted member) 19 Circle clip 20 Clip groove 21 Projection part 22 Insertion opening 23 Insertion port opening 25 Recess 26 Locking groove X End piece insertion direction Y End piece counter insertion direction D1 Outer diameter of projection D2 Average diameter when circlip is free D4 Outside diameter when circlip is free D5 Cylindrical part Inner diameter of insertion port D6 Outer diameter of end piece D7 Average diameter of circlip locked in locking groove F2 Force to pull out end piece F3 Force in expanding direction

Continuation of the front page (56) References JP-A-2-97779 (JP, A) JP-A-49-56057 (JP, A) JP-A-3-200597 (JP, A) JP-A-4-64792 (JP) , A) Japanese Utility Model Showa 62-146038 (JP, U) Japanese Utility Model Showa 58-53922 (JP, U) Japanese Utility Model Showa 63-185909 (JP, U) Japanese Utility Model Showa 41-7924 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16B 21/18

Claims (2)

(57) [Claims] 1. A locking device for inserting an insertion member into a member to be inserted and integrating the member to prevent removal, wherein a clip groove for fitting a circlip is formed in an outer peripheral surface of the insertion member in a circumferential direction. While a plurality of protrusions are provided in the circumferential direction on the side opposite to the insertion direction from the clip groove, the outer diameter of the insertion member is formed to be substantially the same as the inner diameter of the insertion opening of the inserted member, and the outer diameter of the protrusion is The diameter of the circlip at the free time and the outer diameter of the insertion member in the insertion direction on the distal end side are substantially equal to the depth diameter of the locking groove provided on the inner periphery of the inserted member, and the insertion port of the inserted member is A locking device, wherein a plurality of engagement recesses in which a protrusion can be fitted are formed in the portion, and a free inner diameter of the circlip is larger than an outer diameter of the insertion member. 2. A circular cross-section of the circlip, and the outer diameter of the insertion member from the clip groove in the insertion direction and the inner diameter of the insertion opening of the inserted member are inserted into the inserted member of the circlip. 2. The lock device according to claim 1, wherein the lock device is formed to have a smaller diameter than the hourly average diameter.