JP2012095786A - Engaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engaging device having excellent operability and durability.SOLUTION: The male hook 5 of the engaging device 1 is formed of a nearly protrusion body as a whole, and includes a projecting edge 8 on the peripheral end of a head part in a manner that the peripheral end of the roughly columnar shaped head part 5A bulges out in the radial direction from the rear periphery 8A. Meantime, the female hook 7 for engaging with the male hook 5 includes a wholly-nearly-cylindrical-shape base body 14, wherein the base body includes a female hole 13, into which the head part 5A of the male hook 5 is inserted in the dierction indicated by an arrow A, in the center of a circular upper face. Inside the base body 14, an engaging body 20 engaged or disengaged with the projecting edge 8 of the male hook 5, is provided.

Description

  The present invention relates to an engagement tool that is used in, for example, a wallet, a second bag, and the like, and engages between an engaging portion to be fixed and an engaged portion.

Conventionally, a press hook is generally used as an engagement tool used in a wallet, a second bag, or the like. As a press hook, as shown in the following Patent Document 1, the head is made of a substantially convex body as a whole, and the leading edge of the leading part having a substantially cylindrical shape projects outward in the radial direction from the rear circumferential part. A male hook provided with a protruding edge at the tip peripheral portion of the part, and a generally cylindrical base provided with a female hole for engaging the head part of the male hook at the center of the upper surface forming a circle, and the interior of the base In the state where the front part of the male hook is engaged from the female hole, the whole hook is engaged in a hole formed around the front part of the male hook having a substantially cylindrical shape. A female hook that positions the engaging body that can be engaged with or disengaged from the projecting edge portion in a state of being retained in the female hole.
That is, this type of engagement tool is configured to support the male hook on the engaging portion to be fixed and the female hook on the engaged portion, and engage or disengage between the engaging portion and the engaged portion. Is possible.

  In addition, recently, as shown in Patent Document 2 below, one engaging center of the engaging tool is provided with an attracting portion formed of a permanent magnet, and the other engaged center is also permanently attracted to the attracting portion. Engagement tool comprising an attracted part formed by a magnet and capable of engaging between the engaged part and the engaged part in a reliable and alignable manner by mutual suction between the attracted part and the attracted part Has also been proposed.

JP 2009-72329 A Japanese Patent No. 3849113

  By the way, the applicant ensures that the engagement between the male hook and the female hook is ensured in such a conventional engagement tool, and the male hook does not easily disengage from the female hook, and the engagement / disengagement of both easily. An engaging tool with good operability that can be performed has been developed.

  This is because the conventional engagement tool made of a push hook easily disengages the male hook from the female hook with a little external force, and such a problem is usually caused by the engagement body formed of an elastic body. It was supposed that the elastic force was lowered by repeated use and was likely to occur.

  The present invention has been made paying attention to such conventional problems, and has an object of providing an engaging tool that is excellent in operability and excellent in durability.

  In order to achieve the above object, claim 1 of the present invention is generally composed of a substantially convex body, and the tip peripheral portion of the leading portion having a substantially cylindrical shape projects outward in the radial direction from the rear peripheral portion. And a male hook having a protruding edge at the front end peripheral portion thereof, and a generally cylindrical base having a female hole for engaging the head of the male hook at the center of a circular upper surface, In the inside, the top part of the male hook having a substantially cylindrical shape with the front part of the male hook being engaged from the female hole is an overall annular thing that engages in the hole formed at the center, An engagement tool comprising: a female hook that positions an engaging body that can be engaged with or disengaged from a protruding edge of the male hook in a state of being retained in the female hole. Formed with a permanent magnet at least in the center of the tip of the circular shape at the top of the cylinder. On the other hand, the leading portion of the male hook is engaged with the inside of the base body from the female hole at least at the center position in the inner bottom portion of the female hole inside the base body that is positioned in a state where the engaging body is indwelled. An annular engagement body that is provided with an attracted portion formed of a permanent magnet that can be attracted to the attracting portion of the male hook in a state of being close to the inner bottom portion of the female hole, and is positioned while being retained in the female hole Is engaged with the protruding edge formed at the tip periphery of the front part of the male hook to be engaged with the front part of the male hook being engaged from the female hole and the suction part being close to the attracted part. The elastic body can be expanded in the radial direction and can be reduced in diameter so as to be positioned at the rear peripheral portion of the front portion of the male hook and engaged with the protruding edge portion while the suction portion is attracted to the attracted portion. It is always at the top of the male hook in one place on the circumference An annular snap ring having a cutout portion with a width smaller than the outer diameter of the rear peripheral portion, and a generally cylindrical base body positioned in a state where the engaging body formed in this manner is placed in the female hole. Is a male engaged with the engagement body in the female hole along the normal direction with respect to the center of the female hole of the base at the same position in the circumferential direction as the notch formation position in the engagement body placed inside. It has a slit that allows the front part of the hook to slide through, and the protruding part at the front part of the male hook is engaged with the front part of the male hook through the female hole. The engaging direction of the male hook at the leading end of the male hook in the engaged state in which the engaging body that collides with the projecting edge portion of the portion and expands in the radial direction and the attracting portion attracts the attracted portion reduces in diameter. The tip of the head so that it cannot be disengaged in the opposite direction. The end peripheral part is formed so as to expand in a tapered shape from the frontmost part toward the rear, the adsorption part is adsorbed to the adsorbed part, and the engagement body formed by the snap ring is the front part of the male hook In the case where the male hook is released from the female hook from the engaged state with respect to the female hook, the suction part is removed from the attracted part to the center of the female hole of the base body. The male hook is separated from the base body of the female hook so as to be slid in the radial direction, and the rear peripheral portion of the front portion of the male hook is passed through the notch of the engaging body formed by the snap ring. The union of the male hook that has expanded the united state, changed from the engaged state in which the head portion of the male hook is inserted into the hole portion of the engaging body to the disengaged state in which the male hook is positioned outside the hole portion, and has passed through the notch portion. The top part further to the female hole center of the base Slide radially, in which the engaging member, characterized by being configured so as to pass through the slit.

  The invention according to claim 2 is the engagement tool according to claim 1, wherein the engagement body is formed of a flexible material made of synthetic resin or metal.

  The invention according to claim 3 is the engagement tool according to claim 1, wherein the engagement body is provided with a positioning piece for positioning and supporting the base body in a state of being retained in the female hole.

  Further, the invention according to claim 4 is the engagement tool according to claim 1, wherein the protruding edge portion of the front portion of the male hook is formed continuously along the circumferential direction of the front peripheral portion.

According to the present invention, it is possible to reliably and easily engage the male hook with the female hook so that the attracting portion is attracted to the attracted portion. The front part of the hook engages with the inside of the base through the female hole, collides with the protruding edge part of the front part of the male hook and expands in the radial direction, and the engagement body that the adsorption part adsorbs to the adsorbed part has a reduced diameter. In the engaged state, the tip peripheral portion of the leading portion is tapered from the most leading portion toward the rear so that the engagement in the direction opposite to the engagement direction with respect to the female hole of the leading portion of the male hook cannot be performed. Since it is formed so as to expand, the male hook does not easily disengage from the female hook even when some external force is applied on the male hook side. When the male hook is disengaged from the female hook, the male hook is separated from the base body of the female hook so that the suction portion is slid radially from the sucked portion with respect to the center of the female hole of the base body. Engagement state in which the engagement body is expanded so that the rear peripheral portion of the front part of the male hook is passed through the notch part of the engagement body formed in this manner, and the front part of the male hook is inserted into the hole of the engagement body From the position of the disengagement that is positioned outside the hole, the top part of the male hook that has passed through the notch is further slid radially with respect to the center of the female hole of the base so that the slit passes. Can be done. As a result, the male hook can be disengaged from the female hook by a simple operation, and it is possible to provide an engaging tool that is excellent in operability and durability.

It is a perspective view which shows the second bag to which the engaging tool which concerns on embodiment of this invention is attached. It is a perspective view which shows the state which released the engagement of the male hook of the engagement tool from the female hook. It is a perspective view which shows the state which expanded and showed the III section of FIG. It is a perspective view which shows the structure of a male hook and a female hook. It is a perspective view which shows the attachment state with respect to the second bag of a male hook. It is a perspective view which shows the decomposition | disassembly state of a female hook. It is sectional drawing which shows the state which engages a male hook in the female hole in the base | substrate of a female hook along the VII-VII line of FIG. It is sectional drawing which shows the state which made the adsorption | suction part of the male hook adsorb | suck to the to-be-adsorbed part by the side of the base | substrate of a female hook, and made the engagement edge engage the protrusion part of the front part of the male hook. It is sectional drawing which follows the IX-IX line of FIG. 4 which shows the state which cancels | releases a male hook from the engagement state with respect to the female hook of a male hook. It is sectional drawing which shows the state which made the male hook slide to the radial direction from the base | substrate center of the female hook, and was disengaged from the female hook.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. The embodiment shown in FIGS. 1 to 10 is similar to the engaging tool 1 as a push hook. For example, in the second bag 2 shown in FIGS. 1 and 2, the engaging tool 1 includes a male hook 5 on the inner side of a folding lid 4 as an engaging portion that covers the opening 3, and a front piece 6 as an engaged portion. The female hooks 7 are formed on the surface of the film (see FIGS. 2 and 3).

  As shown in FIG. 3, the male hook 5 is formed of a substantially convex body as a whole, and has a top portion 5A having a substantially cylindrical shape and a base end portion 5B having a disk shape. The front part 5A of the male hook 5 having a substantially cylindrical shape is provided with a protruding edge part 8 at the front end peripheral part of the front part 5A so that the front end peripheral part protrudes outward in the radial direction from the rear peripheral part 8A. (See FIG. 4).

  That is, the male hook 5 has a rear surface of the base end portion 5B in the round hole 10 formed in the engagement surface material 9A among the two engagement surface materials 9A and 9B shown in FIG. A retaining ring 12 disposed between the engaging surface material 9A and the engaging surface material 9B is attached to the leg portion 11 so that the engaging surface on the inner side of the folding lid 4 is inserted. The male hook 5 is fixed to the material 9A (see FIGS. 7 to 10). As a result, the male hook 5 is positioned inside the folding lid 4 in a state where the leading portion 5A is exposed (see FIG. 2). The engaging face materials 9A and 9B are stitched together to form the folded lid 4.

  On the other hand, the female hook 7 that can engage the leading portion 5A of the male hook 5 in the direction of arrow A in FIG. 3 has a female hole 13 that engages the leading portion 5A of the male hook 5 in the direction of arrow A. An overall substantially cylindrical shape provided at the center of the upper surface forming a circle is provided, and an overall substantially cylindrical base 14 is provided (see FIGS. 3 and 4).

  That is, as shown in FIG. 6, the female hook 7 is formed by fitting an overall cylindrical base body 14A and an overall disc-shaped support base 14B, and includes a cylindrical space 14C inside. Assembly is possible as shown in FIG. 4 (see FIG. 6).

  As shown in FIG. 6, the female hook 7 has a leg portion 15 formed on the rear surface of the disc-shaped support base 14 </ b> B, and two engaged surface members 16 </ b> A and 16 </ b> B constituting the front piece 6 of the second bag 2. Among them, a stopper ring 18 that is inserted between the engaged surface material 16A and the engaged surface material 16B is inserted into the round hole 17 formed in the engaged surface material 16A. It is attached and fixed to the front piece 6 (see FIG. 2). The engaged face materials 16A and 16B are sewn together to form the surface piece 6.

  Furthermore, the support body 14B and the base body 14A are formed by fitting, and in the space 14C inside the base body 14 to be assembled, the entire body is annular, and the engagement body 20 having the hole 19 at the center is indwelling. Positioned with. The engagement body 20 having an overall annular shape is a synthetic resin snap ring having a notch portion 21 at one circumferential portion in the circumferential direction (θ direction in FIG. 6), and in the circumferential direction (θ direction) with respect to the notch portion 21. Is provided with a positioning piece 22 that protrudes toward the support base 14B (see the half-engaged engagement body 20 indicated by B in FIG. 6). The positioning piece 22 is coupled in a state of being inserted into an engagement hole 23 formed at an arbitrary angular position in the circumferential direction of the support base 14B (see FIG. 6).

  An engaging body 20 having a hole 19 at the center and a notch 21 at one place in the circumferential direction (θ direction) is formed inside the female hole 13 by coupling the positioning piece 22 to the coupling hole 23 of the support base 23. In the space 14 </ b> C, the notch 21 is positioned in a state of being detained inside the base body 14 so as to always face a fixed direction (C direction shown in FIG. 4).

  The engagement body 20 in the female hole 13 of the female hook 7 is, as shown in the direction of arrow A in FIG. 7, a leading portion 5A of the male hook 5 having a substantially cylindrical shape in a state of being engaged toward the female hole 13. Is engaged with the projecting edge portion 8 at the tip of the male hook 5 so as to be engaged or disengaged.

  Here, as shown in FIG. 4 or FIG. 8, the center position of the front end surface forming the circular shape of the top portion 5A of the male hook 5 engaged in the direction of arrow A toward the female hole 13 is permanent. The adsorption portion 24 is provided and formed in a state where the magnet is embedded. On the other hand, as shown in FIG. 4, in the space 14 </ b> C inside the base body 14 positioned in a state where the engaging body 20 is placed, the male hook 5 is positioned at the center position of the support base body 14 </ b> B constituting the inner bottom portion of the female hole 13. An adsorbed part 25 that can be adsorbed and adsorbed to the adsorbing part 24 of the male hook 5 in a state where the head part is engaged with the inside of the base body 14 from the female hole 13 and close to the inner bottom part of the female hole 13. Is provided.

  As shown in FIGS. 7 to 10, the attracted portion 25 is formed by embedding a permanent magnet at the center position inside the support base 14B. Here, the attracted portion 25 provided at the center position of the support base 14 </ b> B constituting the inner bottom portion of the female hole 13 is different from the magnet polarity (for example, N pole) of the attracting portion 24 at the front end surface of the leading portion 5 </ b> A of the male hook 5. A polar (S pole) suction force is applied.

  The annular engagement body 20 that is positioned while being retained in the female hole 13 has the male hook 5 in a state where the leading portion 5A of the male hook 5 is engaged from the female hole 13 in the direction of arrow A in FIG. The adsorbing portion 24 is close to the adsorbed portion 25 on the base 14 side, and the adsorbing portion 24 and the adsorbed portion 25 suck each other to form the protruding edge portion 8 formed at the tip peripheral portion of the male hook 5. It will collide so that it may pass. Here, in the annular engagement body 20 provided with the notch portion 21, the inner diameter of the hole portion 19 is always smaller than the outer diameter of the protruding edge portion 8 of the male hook 5, and the engagement body 20 faces the hole portion 19. And an engagement groove 27 that allows the protruding portion 8 to be accommodated in an engaged state, and has an U-shaped cross section (see FIG. 8). ).

  That is, when the male hook 5 is engaged in the engagement body 20 in the direction of arrow A in FIG. 7, the protruding edge portion 8 formed at the foremost portion of the male hook 5 collides with the engagement claw 26 portion. Then, the engaging body 20 made of a synthetic resin snap ring made of an elastic body as a whole is expanded in the radial direction in the direction of the arrow D around the notch 21 by the contact (FIG. 6). reference).

Further, when the male hook 5 is engaged in the direction of the arrow A until the suction portion 24 on the front end surface of the leading portion 5A of the male hook 25 is attracted to the attracted portion 25 of the support base 14B, it engages with the engaging claw 26. The protruding edge 8 at the most distal end of the male hook 5 is accommodated in the engagement groove 27 having a U-shaped cross section of the engagement body 20 (see FIG. 8). 6 in the direction of arrow E. As a result, the rear peripheral portion 8A and the engaging claw 26 in the leading portion 5A of the male hook 5 are engaged.

Here, the projecting edge portion 8 at the head portion 5A of the male hook 5 is such that the head portion 5A of the male hook 5 is engaged with the inside of the base body 14 through the female hole 3 in the direction of arrow A, and the engaging body 20 is The projecting edge portion 8 in the head portion 5A collides with the engaging claw 26 and expands in the radial direction (the direction of FIGS. 6 and 7D), and the subsequent suction portion 24 is attracted to the attracted portion 25 and is reduced in diameter ( In the engaged state of the male hook 5 with the diameter reduced in the direction of FIG. 6E with respect to the female hook 7, the direction opposite to the engaging direction (arrow A direction in FIG. 7) with respect to the female hole 13 of the leading portion 5A of the male hook 5 (FIG. 8). The tip peripheral portion of the leading portion 5A is formed so as to expand in a tapered shape from the most distal portion to the rear so that the engagement cannot be released in the direction of arrow P) (see FIGS. 7 and 8). . In addition, the notch 21 formed in the engagement body 20 has an outer diameter W (the rear peripheral portion 8A of the front portion 5A of the male hook 5 in the normal state where the engagement body 20 is reduced in diameter in the direction of arrow E. Since the width T1 (see FIG. 6) is smaller than that in FIG. 4), in the engaged state of the front portion 5A of the male hook 5 by the engaging body 20 shown in FIGS. The state engaged inside is held.

The overall substantially cylindrical base body 14 positioned in a state where the engaging body 20 formed of an elastic material having flexibility as a whole is placed in the female hole 13 is notched in the engaging body 20 placed inside. The slit 28 is provided at the same position in the circumferential direction (θ direction) as the formation position 21 (see FIGS. 4, 9, and 10). That is, the base body 14 supports the engaging body 20 on the support base body 14B so that the positioning piece 22 is coupled to the coupling hole 23, and the notch portion 21 of the engaging body 20 supported on the support base body 14B in this way is circumferential ( The support base 14B and the base body 14A are combined and assembled so as to correspond in the θ direction (see FIG. 6).

As a result, the notch 21 and the slit 28 of the engagement body 20 in the base body 14 correspond to the normal direction of the arrow C direction (see FIG. 4) with respect to the center of the female hole 13 of the base body 14 in the base body 14. It will be. Here, the slit 28 is formed in advance so as to have a width that allows the leading portion 5 </ b> A of the male hook 5 engaged with the engaging body 20 in the female hole 13 to slide through.

The attracting portion 24 is attracted to the attracted portion 25, and the engaging claw 26 of the engaging body 20 formed by the snap ring and the rear peripheral portion 8A in the leading portion 5A of the male hook 5 are engaged, and the arrow in FIG. When the male hook 5 is disengaged from the female hook 7 from the engaged state with the female hook 7 of the male hook 5 whose diameter is reduced in the E direction and the protruding edge portion 8 is fitted in the engagement groove 27 having a U-shaped cross section. First, as shown in FIG. 9, the folding lid 4 as the engaging portion is slid in the direction of the arrow Q1. That is, by such an operation, the suction portion 24 that is attracted to the attracted portion 25 is slid radially from the attracted portion 25 to the center of the female hole 13 of the base body 14 along the arrow C direction (see FIG. 4). The male hook 5 can be separated from the base 14 of the female hook 7.

Here, the rear peripheral portion 8A of the front portion 5A of the male hook 5 is allowed to pass through the cutout portion 21 of the engagement body 20 formed by the snap ring, but the outer diameter W of the rear peripheral portion 8A (see FIG. 4). ) Is formed to be smaller than the width T1 of the notch 21 in the diameter-reduced state of the engagement body 20, so that the protruding edge 8 of the male hook 5 and the notch 21 of the engagement body 20 are brought into contact with each other when passing. The engagement body 20 is expanded in the direction of arrow D in FIG. As a result, the male hook 5 is disengaged from the engagement state (the state shown in FIG. 9) inserted through the hole 19 of the engagement body 20 of the leading portion 5A (the state shown in FIG. 9). In the state shown in FIG. Furthermore, it becomes possible to slide the leading portion 5A of the male hook 5 that has passed through the notch 21 in the radial direction (Q1 direction in FIG. 9) around the female hole 13 of the base 14 and pass through the slit 28. As a result, the folding lid 4 can be disengaged in the direction of the arrow Q2 (see FIG. 10). As a result, the inside of the opening 3 of the second bag 2 can be opened outward.

As described above, according to the engaging tool 1 according to the above-described embodiment, the male hook 5 is engaged with the female hook 7 so that the attracting portion 24 formed by the permanent magnet is changed to the attracted portion 25 also formed by the permanent magnet. It is possible to reliably perform the adsorption.

Further, the protruding portion 8 at the leading portion 5A of the male hook 5 is engaged with the protruding portion 8 at the leading portion 5A of the male hook 5 so that the leading portion 5A of the male hook 5 is engaged with the inside of the base body 14 through the female hole 13. In the reduced diameter state of the engagement body 20 that expands in the radial direction and the suction portion 24 is attracted to the attracted portion 25, the engagement direction of the leading portion 5A of the male hook 5 with respect to the female hole 13 (the direction of FIG. 7A) The protrusion 8 is formed so that the tip peripheral portion of the leading portion 5A expands in a tapered shape from the most leading portion to the rear so that the engagement cannot be released in the opposite direction (the direction of FIG. 8P). Therefore, the male hook 5 is not easily detached from the female hook 7 even when some external force is applied to the male hook 5 side. For this reason, the folding lid 4 can be engaged with the front piece 6 without being easily detached.

When the male hook 5 is disengaged from the female hook 7, the male hook 5 is slid radially from the suctioned portion 25 to the center of the female hole 13 of the base body 14. The engagement body 20 is expanded so that the rear peripheral portion 8A of the front portion 5A of the male hook 5 passes through the notch portion 21 of the engagement body 20 formed by a snap ring and separated from the base body 14. The top of the male hook 5 that has passed through the notch portion 21 from the engaged state inserted through the hole portion 19 of the engagement body 20 to the disengaged state in which the top portion 5A of the engagement body 20 is positioned outside the hole portion 19 The portion 5A can be further slid in the radial direction with respect to the center of the female hole 13 of the base 14 and passed through the slit 28.

As a result, the male hook 5 can be disengaged from the female hook 7 by a simple operation, and an engagement tool excellent in operability and durability can be provided.

According to the above-described embodiment, the protruding edge 8 in the leading portion 5A of the male hook 5 is continuously formed along the circumferential direction of the leading peripheral portion as shown in FIG. 4 or FIG. You may make it form intermittently with a predetermined space | interval.

Further, according to the above embodiment, the engaging body 20 is made of a synthetic resin snap ring which has flexibility as a whole and has elasticity capable of expanding and contracting as shown by the arrow D direction or E direction in FIG. Although formed, of course, you may form with the flexible material which consists of metal annular springs. Further, in the above embodiment, the engagement claw 26 is formed with the engagement body 20 facing inward, and the engagement groove 27 is formed in the U-shaped cross section with the engagement groove 27 inward. The present invention is not limited to such a configuration, and may be a C-shaped annular spring that includes a notch and can be engaged with the protruding edge 8 of the male hook 5 to be engaged.

Further, according to the above embodiment, the attracting portion 24 is formed so as to embed the permanent magnet in the central portion of the circular tip surface at the head portion of the male hook 5. It is good also as the adsorption | suction part 24 sticking and the whole front end surface.

On the other hand, the attracted portion 25 that attracts the attracting portion 24 is also formed so as to embed a permanent magnet at the center position inside the support base 14B in the above embodiment. For example, the entire surface of the support base 14B is permanent. A magnet is attached, and the entire inner bottom portion of the female hole 13 in the base 14 may be used as the attracted portion 25.

As described above, the present invention allows the male hook to be disengaged from the female hook by a simple operation without the male hook easily detaching from the female hook even when some external force is applied on the male hook side. Therefore, it can be applied to various products such as wallets and second bags that require an engaging tool.

1 Engagement tool (push hook)
2 Second bag 3 Opening 4 Folding lid (engaging part)
5 Male hook 5A Leading part 5B Base end part 6 Front piece (engaged part)
7 Female hook 8 Projection edge portion 8A Rear peripheral portion 9A, 9B Engagement surface material 16A, 16B Engagement surface material 10, 17 Round hole 11, 15 Leg portion 12, 18 Stop ring 13 Female hole 14 Base 14A Base body 14B Support base 14C Space 19 Hole 20 Engagement body 21 Notch 22 Positioning piece 23 Bonding hole 24 Adsorption part 25 Adsorption part 26 Engagement claw 27 Engagement groove 28 Slit

Claims (4)

A male hook consisting of a substantially convex body as a whole, and having a substantially cylindrical shape at the tip peripheral portion of the head portion protruding outward in the radial direction from the rear peripheral portion, and having a protruding edge portion at the tip peripheral portion of the head portion A generally cylindrical base having a female hole for engaging the top of the male hook at the center of the top surface of the circular shape, and the top of the male hook is engaged with the female hole inside the base. The front part of the male hook, which has a substantially cylindrical shape when it is inserted, has a generally annular shape that engages with the hole formed at the center, and engages or disengages from the protruding part of the male hook. In an engagement tool comprising a female hook that positions the engagement body that enables the engagement body in a state of being retained in the female hole,
It is assumed that at least the central portion of the front end surface forming the circular shape of the top portion of the male hook is provided with a suction portion formed of a permanent magnet,
On the other hand, at the center position of the inner bottom of the female hole inside the base body positioned in the state where the engaging body is indwelled, the leading portion of the male hook is engaged with the inside of the base body from the female hole, In the state of being close, it is provided with an attracted part formed of a permanent magnet that can be attracted to the attracting part of the male hook,
The annular engagement body positioned in the state of being retained in the female hole is such that the front part of the male hook to be engaged with the front part of the male hook being engaged from the female hole and the adsorption part being in proximity to the attracted part. It is possible to expand in the radial direction by colliding with the protruding edge formed at the tip periphery of the head, and positioning it at the rear periphery of the front part of the male hook while the suction part is attracted to the attracted part An elastic body that can be reduced in diameter so as to be engaged with the projecting edge portion, and is provided with a notch having a width smaller than the outer diameter of the rear peripheral portion at the front portion of the male hook at one place on the peripheral portion. Snap ring,
In addition, the entire substantially cylindrical base body that positions the engaging body formed in this manner in a state of being retained in the female hole,
The male hook engaged with the engagement body in the female hole is formed in the same position in the circumferential direction as the formation position of the notch portion in the engagement body to be placed inside, along the normal direction with respect to the center of the female hole of the base body. Provided with a slit that allows the leading portion to slide through, and the protruding edge portion at the leading portion of the male hook engages the inside of the base body through the female hole, and at the leading portion of the male hook In the engaged state where the engaging body that abuts against the protruding edge and expands in the radial direction and the attracting part attracts the attracted part has a reduced diameter, it is opposite to the engaging direction with respect to the female hole at the top of the male hook. The tip peripheral portion of the leading portion is formed so as to expand in a tapered shape from the most leading portion to the rear so that the engagement cannot be released in the direction,
From the engaged state of the male hook with respect to the female hook, the diameter of the male hook is reduced so that the engaging body is attracted to the attracted portion and the engaging body formed by the snap ring engages with the rear peripheral portion at the front portion of the male hook. When the hook is disengaged from the female hook, the male hook is separated from the base body of the female hook so that the suction portion is slid radially from the attracted portion to the center of the female hole of the base body, and the snap ring is used. From the engaged state in which the engagement body is expanded so that the rear peripheral portion of the front portion of the male hook passes through the notch portion of the formed engagement body, and the front portion of the male hook is inserted through the hole of the engagement body. In addition, in a disengaged state that is positioned outward of the hole, the top part of the male hook that has passed through the notch is further slid radially with respect to the center of the female hole of the base so that the slit passes. With the features Rukakarigogu.   The engagement tool according to claim 1, wherein the engagement body is formed of a synthetic resin or metal flexible material.   The engagement tool according to claim 1, wherein the engagement body is provided with a positioning piece for positioning and supporting the base body in a state of being retained in the female hole.   The engagement tool according to claim 1, wherein the protruding edge portion at the head portion of the male hook is formed continuously along the circumferential direction of the head periphery portion.

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