WO2011052868A1

WO2011052868A1 - Double safety locking pin apparatus

Info

Publication number: WO2011052868A1
Application number: PCT/KR2010/003554
Authority: WO
Inventors: 염동환
Original assignee: 에스에스오토엔지니어링(주)
Priority date: 2009-10-26
Filing date: 2010-06-03
Publication date: 2011-05-05
Also published as: CN102052019A; KR100945027B1

Abstract

The present invention relates to a locking pin apparatus, and more particularly, to a double safety locking pin apparatus configured with a double locking mechanism. A double safety locking pin apparatus according to a first embodiment of the present invention comprises: a housing formed within a first lockable body, and including a cylindrical body, an upper plate formed on an upper portion of the body, and a lower plate formed on a lower portion of the body; a locking pin consisting of a knob, a pin, and a stopper formed on a side of the pin, wherein the pin is inserted through the central portion of the housing and has a spring mounted around same, and the pin is inserted into a second lockable body when pressed upon by means of the external force and the spring; and a locking piece formed in a lengthwise direction on an inner side of the housing body, and defining a certain space between a leading end thereof and the lower plate of the housing, wherein the stopper, by being rotated, is positioned within the space to perform the locking function. A first locking stage of the first and second lockable bodies is performed by the locking pin, and a second locking stage of the first and second lockable bodies is performed by the locking piece and the stopper.

Description

Double safety lock pin device

The present invention relates to a lock pin device, and more particularly to a double safety lock pin device implemented a double lock device.

In general, the locking pin device is a device that performs the locking function by the locking pin to the two locked body.

The locking pin device including the locking pin is mounted to the first locked body, and the hole to which the locking pin is inserted is formed in a portion corresponding to the locking pin.

The locking pin device is formed by a cylindrical housing, an upper plate and a lower plate, with a locking pin fitted into a spring.

A stopper is provided at a lower side of the locking pin, a knob is formed at an upper end thereof, and the locking pin is positioned through the upper plate and the lower plate of the housing.

In the locking operation, when the pin of the locking pin is pulled up and the pin is inserted into the hole of the second to-be-locked body (by the elastic force of the spring), the stopper is extended over the lower plate of the housing to lock the two to-be-locked body to complete the locking operation. .

This conventional locking pin device has the advantage of being simple to use, but the locking state may cause unintentional release of the lock due to external vibration or shock to the locking pin or incorrect operation of the locking pin, Damage or safety accidents may occur.

In order to solve this safety locking problem, if the insertion depth of the locking pin is deepened, self-locking locking convenience cannot be achieved, and the elastic modulus of the spring used for the locking pin is inevitably increased. This causes a problem of increased locking operation.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-described problems is to provide a double safety lock pin device capable of maintaining a primary lock state by a stopper and a lower plate of a housing and a secondary lock state by a stopper and a locking piece. To provide.

Further, the primary locking state is a locking structure in the axial direction of the lock pin, and the secondary locking state is a locking structure in a direction perpendicular to the locking pin axial direction, thereby restraining the movement of the locking pin in the axial direction. It is intended to prevent unintentional release of the lock by vibration, shock or malfunction.

According to a first embodiment of the present invention for solving the above problems, a double safety lock pin device, the housing; It is inserted into the housing and elastically supported by a spring outward, a knob is mounted outside the upper plate of the housing and a stopper is formed between the lower part of the spring and the inner side of the lower plate of the housing, A locking pin for positioning the stopper to implement first stage locking of the first and second to-be-locked bodies; Is formed between the housing and the locking pin, by rotating the stopper at a predetermined position in accordance with the rotation of the locking pin to lock the front end of the stopper to implement a two-stage locking of the first and second to-be-locked body It comprises a locking piece.

Here, the locking piece is connected to the upper portion of the housing is formed in a downward direction, it is preferable that the circular arc piece having an outer diameter smaller than the outer diameter of the housing.

Here, a stopper step of a predetermined depth and width may be formed at a predetermined position on the upper side of the lower plate of the housing so that the stopper may move downward according to the rotation of the locking pin. Can be.

In addition, the double safety lock pin device according to a third embodiment of the present invention, the housing; Inserted into the housing and elastically supported by the first and second springs outwardly, and a stopper is formed between the first and second springs so that the stopper is positioned by the lower plate of the housing. A locking pin for implementing a one-stage locking of the object to be locked; Is formed between the housing and the locking pin, by rotating the stopper at a predetermined position in accordance with the rotation of the locking pin to lock the front end of the stopper to implement a two-stage locking of the first and second to-be-locked body It comprises a locking piece.

In addition, the double safety lock pin device according to a fourth embodiment of the present invention, the housing; Inserted into the housing and elastically supported by a spring outwardly, a first stopper is formed between a lower portion of the spring and an inner side of a lower plate of the housing, and a knob and a second stopper are formed outside the upper plate of the housing, A locking pin for positioning the first stopper by the lower plate of the housing to implement the first stage locking of the first and second to-be-locked bodies; And a locking piece configured to rotate the second stopper at a predetermined position according to the rotation of the locking pin to lock the tip of the second stopper to implement two-stage locking of the first and second to-be-locked bodies. .

Here, the locking piece is formed integrally with the upper plate of the housing, it is preferable that the circular arc piece having an outer diameter smaller than the outer diameter of the housing.

The stopper step of a predetermined depth and width may be formed at a predetermined position on the upper side of the upper plate and the lower plate of the housing so that the first and second stoppers may move downward in accordance with the rotation of the locking pin. The fifth embodiment of can be configured.

Here, in the first to fifth embodiments according to the present invention, the second to-be-locked body is in contact with the tip of the locking pin to implement self-locking with the locking pin. A taper can be formed around the hole of the object to be locked.

According to the configuration of the present invention described above, the double safety lock function that can maintain the primary lock state by the stopper and the lower plate of the housing and the secondary lock state by the stopper and the locking piece, and lock the secondary lock state By having the locking structure in the direction perpendicular to the pin axial direction to restrain the movement of the locking pin in the axial direction, it is possible to prevent the unintentional release of the lock by external vibration, shock or malfunction.

FIG. 1 is a perspective view of a double safety lock pin device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a sectional view taken along the line AA of FIG. 1. 4 is a cross-sectional view taken along line BB of FIG. 1.

FIG. 5 is a perspective view of a double safety locking pin device according to a second embodiment of the present invention, FIG. 6 is a cross-sectional view taken along AA of FIG. 5, and FIG. 7 is a AA cross-sectional view of FIG. 5, and self-locking. ), And FIG. 8 illustrates a cross-sectional view taken along line BB of FIG.

FIG. 9 is a perspective view of a double safety lock pin device according to a third embodiment of the present invention, FIG. 10 is a cross-sectional view taken along AA of FIG. 9, and FIG. 11 is a self-locking as a cross-sectional view taken along AA of FIG. 9. 12 is a sectional view taken along line BB of FIG.

FIG. 13 is a perspective view of a double safety locking pin device according to a fourth embodiment of the present invention, FIG. 14 is a sectional view taken along AA of FIG. 13, and FIG. 15 is a sectional view taken along AA of FIG. 13. FIG. 16 is a cross-sectional view taken along line BB of FIG. 13.

FIG. 17 is a perspective view of a dual safety lock pin device according to a fifth embodiment of the present invention, FIG. 18 is a cross-sectional view taken along the line AA of FIG. 17, and FIG. 19 is a self-locked cross-sectional view taken along the line AA of FIG. 20 is a cross-sectional view taken along line BB of FIG. 17.

Hereinafter, with reference to the accompanying drawings looks at the structure, the locking operation and the effect of the double safety lock pin device according to the present invention.

Prior to the description, the double safety locking pin to which the present invention is applied is a combination of both sides or one side of the first and second to-be-locked bodies by linear movement, both sides or one side of the rotational movement, or both sides about one hinge axis. It can be applied without limitation to the structure in which one side is in contact with the other side while the state movement with the other side, such as the folding hinge movement, or both sides are hinged around each hinge axis.

[이중 안전 잠금 핀 장치의 제1 실시예][First Embodiment of Double Safety Lock Pin Device]

Here, (1-1) is a perspective view of a locking pin apparatus, (1-2) is a perspective view of a housing, (1-3) is a perspective view of a locking pin.

As shown, the double safety lock pin device according to the first embodiment of the present invention is the housing 10, the upper plate 11, the lower plate 12, the locking pin 13, the knob 14, the stopper ( 15), spring 16 and locking piece 17.

The housing 10 is formed of a cylindrical body, an upper plate 11 and a lower plate 12, and a through hole is formed in the center of the upper plate 11 and the lower plate 12 so that the locking pin 13 penetrates. . The upper plate 11 is divided into an open part and a closed part, which is an open part and a close part of the locking pin 13. 17) to prevent the unlocking of the locking pin 13 in the upward direction.

The lock pin 13 penetrates and is inserted into the housing 10, and the upper end of the lock pin 13 has a knob 14 formed therein and is located outside the lock pin 13 positioned inside the housing 10. Is placed with the spring 16 wound.

The locking pin 13 consists of a knob 14, a pin 13 ′ and a stopper 15. A stopper 15 is formed at the lower portion of the locking pin 13 so as to contact the lower plate 12 of the housing 10 by the elastic force of the spring 16, and the stopper 15 is formed according to the elastic force of the spring 16. As the locking pin 13 is up-down, the first stage locking and releasing is performed.

The locking piece 17 is formed between the housing 10 and the locking pin 13, and is connected to the upper plate 11 to have a shape of an arc piece formed in a downward direction. A space into which the stopper 15 is inserted by the rotation of the locking pin 13 is formed at the tip of the locking piece 17 and the lower plate 12, and maintains the locking state of the stopper 15 in the space area. The space area is an area corresponding to the closed portion of the upper plate 11.

Comparing the cross-sectional view of FIG. 2 and FIG. 3, FIG. 3 has a self-locking structure. That is, in FIG. 3, the second to-be-locked body B has a taper 19 formed at one end of the second to-be-locked body B which contacts the lock pin 13 so as to self-lock with the lock pin 13. Other configurations are not different from FIG. 2 and FIG. 3.

An operation process of the first embodiment configured as described above is as follows.

The locking pin 13 is inserted into and fixed to one side of the first to-be-locked body A, and the second to-be-locked body B is formed with a hole 18 corresponding to the tip of the locking pin 13.

Pulling up the knob 14 of the locking pin 13 and inserting the tip of the locking pin 13 into the hole 18 of the second lock body B causes the locking pin 13 to be driven by the elastic force of the spring 16. Is forced downward to complete the first stage locking operation of the first and second to-be-locked bodies A and B (see FIG. 2).

At this time, when using the locking pin device having a self-locking structure as shown in Figure 3, it is possible to perform a single-stage locking operation without lifting the knob 14 of the locking pin 13.

Next, when the knob 14 of the locking pin 13 is rotated by a predetermined angle (close area in FIG. 1) about the central axis of the locking pin 13, the stopper 15 moves to the lower plate 12. ) And the locking piece 17 is completed, the two-stage locking operation is completed, even if the locking pin 13 is lifted in the axial direction of the locking pin 13 to be unlocked (see FIG. 4). ).

The lock release proceeds in the reverse order of the above-described lock operation to release the second stage lock (rotate to the open portion of the lock pin 13), and then lift the lock pin 13 in the axial direction to release the first stage lock. The release operation is completed.

[이중 안전 잠금 핀 장치의 제2 실시예][Second Embodiment of Double Safety Lock Pin Device]

FIG. 5 is a perspective view of a double safety locking pin device according to a second embodiment of the present invention, FIG. 6 is a cross-sectional view taken along AA of FIG. 5, and FIG. 7 is a AA cross-sectional view of FIG. 5, and self-locking. 8 is a cross-sectional view taken along line BB of FIG.

5-1 is a perspective view of a locking pin apparatus, 5-2 is a perspective view of a housing, and 5-3 is a perspective view of a locking pin.

As shown, the double safety lock pin device according to the second embodiment of the present invention is the housing 20, the upper plate 21, the lower plate 22, the locking pin 23, the knob 24, the stopper ( 25), a spring 26 and a locking piece 27. The locking pin 23 is composed of a knob 24, a pin 23 ′ and a stopper 25.

Compared with the first embodiment, the second embodiment has the same configuration, but the configuration in which the stopper step 217 is formed on the lower plate 22 is the same or smaller than the width of the locking piece 27.

That is, when the stopper 15 is positioned to the closed region by the stopper step 217 by the stopper step 217, the stopper 15 is placed on the stopper step 217 to lock the pin 23. This downward direction is further inserted into the hole 28 of the second to-be-locked body B by the depth of the stopper step 217 to increase the effect of the locking function.

Of course, at this time, it will be preferable that the length of the locking piece 27 is longer than the length of the locking piece 27 of the first embodiment by the depth of the stopper step 217.

An operation process of the second embodiment configured as described above is as follows.

The locking pin 23 is inserted into and fixed to one side of the first to-be-locked lock A, and the second to-be-locked body B forms a hole 28 corresponding to the tip of the locking pin 13.

Pulling up the knob 24 of the locking pin 23 and inserting the tip of the locking pin 23 into the hole 28 of the second lock body B allows the locking pin 23 to be driven by the elastic force of the spring 26. Is forced downward to complete the first stage locking operation of the first and second to-be-locked bodies A and B (see FIG. 6). In this case, when the locking pin device having the self-locking structure is used as shown in FIG. 7, the first stage locking operation may be performed without lifting the knob 24 of the locking pin 23.

Next, when the knob 24 of the locking pin 23 is rotated by a predetermined angle (close area in FIG. 5) about the central axis of the locking pin 23, the stopper 25 lowers the lower plate 22. ) And the locking piece 27, and at the same time as the stopper step 217, even if the locking pin 23 is lifted in the axial direction of the locking pin 23 to be released, the locking state is not released. The locking pin 23 is further inserted into the second to-be-locked body B by the stopper step 217 to the depth of the stopper step 217 in the axial direction of the locking pin 23 to complete the two-stage locking operation ( 8).

[이중 안전 잠금 핀 장치의 제3 실시예][Third Embodiment of Double Safety Lock Pin Device]

FIG. 9 is a perspective view of a double safety locking pin device according to a third embodiment of the present invention, FIG. 10 is a sectional view taken along AA of FIG. 9, and FIG. 11 is a sectional view taken along line AA of FIG. 9. 12 is a sectional view taken along line BB of FIG.

Here, FIG. 9-1 is a perspective view of the locking pin device, 9-2 is a perspective view of the housing, and 9-3 is a perspective view of the locking pin.

As shown, the double safety lock pin device according to the third embodiment of the present invention is the housing 30, the upper plate 31, the lower plate 32, the locking pin 33, the knob 34, the stopper ( 35), first spring 36a, second spring 36b, and locking piece 37. The locking pin 33 is composed of a knob 34, a pin 33 ′ and a stopper 35.

Compared to the first embodiment, in the third embodiment, unlike the first embodiment, the spring is composed of first and

second springs

36a and 36b and the first and

second springs

36a and 36b. The stopper 35 is formed between), and the other structure has the same structure as 1st Embodiment. Of course, the length of the lock piece 37 may be formed differently from the length of the lock piece 27 of the first embodiment according to the position of the stopper 35.

An operation process of the third embodiment configured as described above is as follows.

The locking pin 33 is inserted into and fixed to one side of the first to-be-locked body A, and the second to-be-locked body B is formed with a hole 38 corresponding to the tip of the locking pin 33.

Pulling up the knob 34 of the locking pin 33 and inserting the leading end of the locking pin 33 into the hole 38 of the second lock body B causes the locking pin ( 33) is applied downward to complete the first stage locking operation of the first and second to-be-locked bodies A and B (see FIG. 10). In this case, when the locking pin device having the self-locking structure is used as shown in FIG. 11, the first stage locking operation may be performed without lifting the knob 34 of the locking pin 33.

Next, when the knob 34 of the locking pin 33 is rotated by a predetermined angle (Close region in FIG. 9) while pressing the knob 34 of the locking pin 33 downward, the stopper 35 is predetermined. The insertion depth of the second to-be-locked body B is increased by moving downward, and even if the locking pin 33 is lifted in the axial direction of the locking pin 33 to be unlocked by the locking piece 37. The lock state is not released and the two stage locking operation is completed (see FIG. 12).

[이중 안전 잠금 핀 장치의 제4 실시예][Fourth Embodiment of Double Safety Lock Pin Device]

Here, FIG. 13-1 is a perspective view of the locking pin apparatus, 13-2 is a perspective view of the housing, and 13-3 is a perspective view of the locking pin.

As shown, the double safety lock pin device according to the fourth embodiment of the present invention is the housing 40, the upper plate 41, the lower plate 42, the locking pin 43, the knob 44, the first And a stopper 417, a second stopper 418, a spring 46, and a locking piece 47. The locking pin 43 consists of a knob 44, a pin 43 ′, and first and second stoppers 417 and 418.

Compared to the first embodiment, in the fourth embodiment, first, unlike the first embodiment, the stopper includes first and second stoppers 417 and 418, and the second stopper 418 includes the first embodiment. In the same manner as in the embodiment, the lower plate 42 of the housing 40 is placed inside, and the first stopper 417 has a structure that is placed outside the upper plate 41 of the housing 40. Second, the fourth embodiment In the case of the example, instead of the configuration of the locking piece 17 in the first embodiment, the locking piece 47 for implementing the locking function of the first stopper 417 is formed.

The locking piece 47 is formed in an arc shape corresponding to the closing area shown in FIG. 13 and is formed outside the upper plate 41 of the housing 40, and preferably integrally with the upper plate 41. And an outer side of the upper portion, and the rest of the configuration has the same configuration as that of the first embodiment.

An operation process of the fourth embodiment configured as described above is as follows.

The locking pin 43 is inserted into and fixed to one side of the first to-be-locked body A, and the second to-be-locked body B is formed with a hole 48 corresponding to the tip of the locking pin 43.

Pulling up the knob 44 of the locking pin 43 and inserting the leading end of the locking pin 43 into the hole 48 of the second lock body B allows the locking pin 43 to be driven by the elastic force of the spring 46. Is forced downward to complete the first stage locking operation of the first and second to-be-locked bodies A and B (see FIG. 14).

At this time, when using the locking pin device having a self-locking structure as shown in Figure 15, it is possible to perform a single-stage locking operation without lifting the knob 44 of the locking pin 43.

Next, when the knob 44 of the locking pin 43 is rotated by a predetermined angle (close area in FIG. 13) with respect to the central axis of the locking pin 43, the first stopper 417 becomes the upper plate. Located between 41 and the locking piece 47 formed on the upper side of the upper plate 41, the locking state is not released even if the locking pin 43 is lifted in the axial direction of the locking pin 43 to be unlocked. The two stage locking operation is completed (see Fig. 16).

[이중 안전 잠금 핀 장치의 제5 실시예][Fifth Embodiment of the Double Safety Lock Pin Device]

FIG. 17 is a perspective view of a double safety locking pin device according to a fifth embodiment of the present invention, FIG. 18 is a sectional view taken along the line AA of FIG. 17, and FIG. 19 is a sectional view taken along the line AA of FIG. 17. 20 is a cross-sectional view taken along line BB of FIG. 17.

Here, Fig. 17-1 is a perspective view of the locking pin device, 17-2 is a perspective view of the housing, and 17-3 is a perspective view of the locking pin.

As shown, the double safety lock pin device according to the fifth embodiment of the present invention is the housing 50, the upper plate 51, the lower plate 52, the locking pin 53, the knob 54, the first And a stopper 517, a second stopper 518, a spring 56, and a locking piece 57. The locking pin 53 consists of a knob 54, a pin 53 ′ and first and second stoppers 517 and 518.

5 is an example in which the stopper step 217 of the second embodiment is configured in the structure of the fourth embodiment.

Compared with the first embodiment, the stopper consists of first and second stoppers 517 and 518, the first stopper 517 lies outside the upper plate 51 of the housing 50, and the second stopper 518. ) Has a structure that lies inside the lower plate 52 of the housing 50 as in the first embodiment, and instead of the configuration of the locking piece 17 in the first embodiment, the locking function of the first stopper 517. Lock piece 57 is formed to implement.

Compared to the fourth embodiment, all other configurations are the same, but the stopper steps 519 and 520 on the outside of the lower plate 52 and the upper plate 51 of the housing 50 are the same or smaller than the width of the locking piece 57. The configuration that formed the is different.

That is, when the first stopper 517 is positioned to the closed area by the rotation of the locking pin 53 by the stopper steps 519 and 520, the second stopper 518 is placed on the stopper step 520. And the first stopper 517 is placed on the stopper step 519 so that the locking pin 53 is further downward into the hole 58 of the second lock body B by the depth of the stopper step 519, 520. It can be inserted to increase the effectiveness of the locking function.

The operation process of the fifth embodiment configured as described above is as follows.

The locking pin 53 is inserted into and fixed to one side of the first to-be-locked body A, and the second to-be-locked body B is formed with a hole 58 corresponding to the tip of the locking pin 53.

Pulling up the knob 54 of the locking pin 53 and inserting the tip of the locking pin 53 into the hole 58 of the second lock body B allows the locking pin 53 to be driven by the elastic force of the spring 56. Is forced downward to complete the first stage locking operation of the first and second to-be-locked bodies A and B (see FIG. 18).

In this case, when the locking pin device having the self-locking structure is used as shown in FIG. 19, the first stage locking operation may be performed without lifting the knob 54 of the locking pin 53.

Next, when the knob 54 of the locking pin 53 is rotated by a predetermined angle (close area in FIG. 17) with respect to the central axis of the locking pin 53, the first stopper 517 moves to the upper plate. (51) The locking piece 57 formed on the upper outer side and the upper plate 51 are located below the locking state, even if the locking pin 53 is lifted in the axial direction of the locking pin 53 to release the lock. The two stage locking operation is completed (see FIG. 20).

At this time, the locking pin 53 is the first and second stoppers (517, 518) are moved downward along the stopper step (519, 520) by the depth, in conjunction with the locking pin 53 is a stopper in the axial downward direction It is further inserted into the second to-be-locked body B by the depth of the steps 519 and 520, and a two-step locking operation is completed (refer FIG. 20).

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Claims

A housing formed in the first lockable body, the housing including a cylindrical body, an upper plate formed on an upper portion of the body, and a lower plate formed on a lower portion of the body;

Comprising a knob and a pin and a stopper formed on one side of the pin, the pin is inserted through the center of the housing, the spring is mounted on the outside, the pin is inserted into the second to-be-locked body by being pressed by an external force and the spring Locking pins;

It is formed in the longitudinal direction inside the housing body, has a constant space between the front end and the lower plate of the housing, the locking piece to perform a locking function by being located between the space by the stopper rotation; includes and,

A double safety lock pin, wherein the first lock of the first and the second to-be-locked body is locked by the locking pin, and the second lock of the first and second to-be-locked body is performed by the locking piece and the stopper. Device.
The method of claim 1,

The locking piece is connected to the upper portion of the housing is formed in a downward direction, a double safety lock pin device of the circular arc having a smaller outer diameter than the outer diameter of the housing.
The method of claim 1,

The upper safety plate of the lower plate of the housing is formed with a stopper step of a predetermined depth and width in a predetermined position so that the stopper can be moved downward in accordance with the rotation of the locking pin.
A housing formed in the first lockable body, the housing including a cylindrical body, an upper plate formed on an upper portion of the body, and a lower plate formed on a lower portion of the body;

Comprising a knob and a pin and a stopper formed on one side of the pin, the pin is inserted through the center of the housing and the first and second springs are mounted on the outside, the stopper is formed between the first and second springs A locking pin which is pressed by an external force and the second spring and into which the pin is inserted into the second to-be-locked body;

It is formed in the longitudinal direction inside the housing body, has a constant space between the front end and the lower plate of the housing, the locking piece to perform a locking function by being located between the space by the stopper rotation; includes and,

A double safety lock pin, wherein the first lock of the first and the second to-be-locked body is locked by the locking pin, and the second lock of the first and second to-be-locked body is performed by the locking piece and the stopper. Device.
The method of claim 4, wherein

The locking piece is connected to the upper portion of the housing is formed in a downward direction, a double safety lock pin device of the circular arc having a smaller outer diameter than the outer diameter of the housing.
A housing formed in the first lockable body, the housing including a cylindrical body, an upper plate formed on an upper portion of the body, and a lower plate formed on a lower portion of the body;

It consists of a knob and a pin and first and second stoppers formed up and down on one side of the pin, the pin is inserted through the center of the housing and the spring is mounted between the first and the second stopper on the outside, A locking pin pressed by the spring and into which the pin is inserted into a second lockable body;

A lock piece having a cross section formed in a 'c' shape on one side of the housing upper plate and performing a locking function by being located in a space formed by the 'c' shape by rotating the first stopper; and,

Double security of the first and the second to-be-locked body is made by the locking pin, and two-stage locking of the 1st and the second to-be-locked body is performed by the locking piece and the first stopper. Locking pin device.
The method of claim 6,

And the locking piece is integrally formed with the upper plate of the housing and is an arcuate piece having an outer diameter smaller than the outer diameter of the housing.
The method of claim 6,

Double safety locking pins are formed on the upper side of the upper plate and the lower plate of the housing to have a stopper step of a predetermined depth and width at a predetermined position so that the first and second stoppers can be moved downward in accordance with the rotation of the locking pin. Device.
The method according to any one of claims 1, 4 or 6,

The second lock is tapered is formed around the hole of the second lock to be in contact with the tip of the lock pin to implement self-locking with the lock pin, double safety lock Pin device.