JPH08142730A - Attachment/detachment structure of locking portion - Google Patents

Abstract

PURPOSE: To improve the assembly work of trimming material without requiring welding work. CONSTITUTION: A fitting engagement portion 26 is formed at the bottom 14 of a clip 10, and guide supports 30 are formed at the base portion 28 of the fitting engagement portion 26. Cutouts 34 are formed between the guide supports 30, and a pair of engage-stopping posts 36 are extendingly provided in the cutouts 34, and at the pair of engage-stopping posts 36, engage-stopping claws 38 are respectively formed. An operation frame 40 is formed at the middle portion of the pair of engage-stopping posts 36, and the inside portion of the operation frame 40 is made to be an operation hole 42. The engage-stopping posts 36 and the operation frame 40 are connected to each other by means of bridging portions 44, and when the operation frame 40 is turned by a predetermined angle, the engage-stopping claws 38 of the engage-stopping posts 36 are moved from engagement positions to release positions. Also, in the state of assembly, the fitting engagement portion 26 of the clip 10 is engaged with the edge portion of a rectangular fitting hole piercingly provided at a fixation member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching / detaching a locking portion, and particularly in a vehicle interior, a wire harness, piping,
The present invention relates to a structure for attaching and detaching a locking portion such as a clip for fixing a carpet or the like to a vehicle body.

[0002]

2. Description of the Related Art Conventionally, various structures have been devised for a structure for attaching and detaching a locking portion such as a clip for fixing a wire harness or the like to an automobile body, and among them, a wire harness arranged on an upper surface of a body panel. Considering the above, a structure for attaching a floor carpet has already been considered.

For example, in the structure for attaching and detaching the engaging portion of the clip 90 shown in FIG. 16, a large diameter portion 92A and the periphery of the large diameter portion 92A are attached to the bottom portion 90A which constitutes the attachment seat of the clip 90. A locking hole 92 composed of a long hole portion 92B formed along the longitudinal direction is formed, and the T stud 96 welded to the body panel panel 94 is inserted into the large diameter portion 92A to remove the long hole portion 92B. The T stud 96 is provided inward of the pair of guide portions 90B formed along the both side edges.
The clip 90 is fixed to the body panel panel 94 by moving the head portion 96A of the.

[0004]

However, the T stud 9 welded to the body panel panel 94 in this manner is as described above.
In the detaching structure of the engaging portion for engaging the clip 90 with 6, the T stud 96 needs to be welded to the position where the clip 90 is engaged, and welding work by a welding machine is required. Further, since the T stud 96 projects from the body panel panel 94, an operator or an interior material such as a carpet or a wire harness is caught by the T stud 96 at the time of assembling the interior material, so that the assembling workability is not good.

In view of the above facts, an object of the present invention is to obtain a structure for attaching and detaching a locking portion which does not require welding work and can improve the workability of assembling the interior material.

[0006]

According to a first aspect of the present invention, there is provided an attachment / detachment structure for an engaging portion, comprising: an attachment hole formed in a fixing member;
To an engaging position which is provided at a position opposite to the fitting engaging portion of the locking member and which engages with the edge portion of the mounting hole of the fixing member, and a releasing position which does not engage with the edge portion of the mounting hole of the fixing member. A pair of movable locking claws, and a bridge portion provided on the locking member for connecting the locking claws to each other and moving the locking claws from the engagement position to the release position by deformation. It is characterized by having.

According to a second aspect of the present invention, there is provided an attachment / detachment structure for a locking portion, wherein the fixing hole is provided at a position opposite to an attachment hole formed in the fixing member and a fitting engagement portion of the locking member. A plurality of locking claws that are movable to an engaging position that engages with the edge of the mounting hole and a release position that does not engage with the edge of the mounting hole of the fixing member, and a removal tool provided on the locking member And an actuating frame having an actuating hole into which the actuating hole can be inserted, the actuating frame being provided on the engaging member and connecting the actuating frame with the plurality of engaging claws, and by rotating the operating frame, the engaging claw is brought into the engaging position From the bridge position to the release position.

According to a third aspect of the present invention, in the attachment / detachment structure of the engagement portion according to the second aspect, a stopper for restricting a rotation angle of the operating frame is provided on the engagement member.

[0009]

In the detaching structure of the engaging portion of the present invention according to claim 1, the engaging member is fixed by engaging the engaging claw of the engaging member with the edge of the mounting hole formed in the fixing member. Can be locked to a member. Therefore, it suffices to form a mounting hole at the position of the fixed member that locks the locking member, and it is not necessary to weld the T stud. Therefore, welding work by a welding machine is not necessary. In addition, the workability of assembling the interior material is improved without the operator or the interior material such as the carpet or the wire harness being caught on the T-stud when the interior material is assembled.

On the other hand, when the locking member is to be removed from the fixed member, the locking member is moved by deforming the bridging portion and moving the locking claw from the engaging position to the releasing position with a removal tool such as a screwdriver. It can be easily removed from the mounting hole of the fixing member. Therefore, the workability of attachment and detachment can be improved. Further, even if the engagement allowance of the locking claw is set to a large value, the locking member can be easily removed from the mounting hole of the fixing member by moving the locking claw from the engagement position to the release position. The engagement allowance of the pawl can be increased, and as a result, the locking strength can be increased.

According to the second aspect of the present invention, the locking member is fixed by engaging the locking claw of the locking member with the edge of the mounting hole formed in the fixing member. Can be locked to a member. Therefore, it suffices to form a mounting hole at the position of the fixed member that locks the locking member, and it is not necessary to weld the T stud. Therefore, welding work by a welding machine is not necessary. In addition, the workability of assembling the interior material is improved without the operator or the interior material such as the carpet or the wire harness being caught on the T-stud when the interior material is assembled.

On the other hand, when the locking member is to be removed from the fixed member, a removal tool such as a screwdriver is inserted into the operation hole formed in the operation frame, the operation frame is rotated, and the locking claw is engaged. The locking member can be removed from the fixed member by moving from the position to the release position. Therefore, the workability of attachment and detachment can be improved. Further, even if the engagement allowance of the locking claw is set to a large value, the locking member can be easily removed from the mounting hole of the fixing member by moving the locking claw from the engagement position to the release position. The engagement allowance of the pawl can be increased, and as a result, the locking strength can be increased. Further, since the locking claw can be moved from the engagement position to the release position by rotating the removal tool, workability is good.

In the structure for attaching and detaching the engaging portion of the present invention as defined in claim 3, when the removing tool such as the driver is rotated by a predetermined angle, the rotation angle of the operating frame is regulated by the stopper provided on the engaging member. Therefore, the locking member can be protected from an overload caused by the removal tool.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the attachment / detachment structure of a locking portion according to the present invention will be described with reference to FIGS.

As shown in FIG. 2, the clip 10 as the locking member of the first embodiment is a clip for attaching a wire harness, piping, carpet, etc. to the upper surface of the body panel of the vehicle body and is made of synthetic resin. ing. The clip 10 includes a bottom portion 14 that forms a mounting seat having a mounting surface 12 on the back surface side, and one side of the bottom portion 14 has a pair of leg portions having a protruding portion 16 formed upward at a tip portion thereof. 14
A is formed. A pair of leg portions 14B is formed on the side of the bottom portion 14 that faces the pair of leg portions 14A, and the tip end portions of the pair of leg portions 14B are vertical wall portions connected to each other upward. 18 is formed. A root portion 20A of the cover portion 20 projects near the pair of leg portions 14B, and the root portion 20A of the cover portion 20 and the vertical wall portion 1 are formed.
And 8 form a scuff fixing groove 22. Note that projections 24 for preventing the clip 10 from rotating are formed on the respective back surfaces of the leg portions 14A and 14B.

As shown in FIG. 3, a fitting engagement portion 26 is formed on the bottom portion 14 of the clip 10, and a portion of the cover portion 20 of the clip 10 facing the fitting engagement portion 26 is A working hole 27 is provided.

As shown in FIG. 4, this fitting engagement portion 26
Has a structure protruding downward from the mounting surface 12 of the bottom portion 14 of the clip 10.

As shown in FIG. 1, the fitting engagement portion 26 of the clip 10 is provided with a rectangular tubular base portion 28 which constitutes the outer peripheral portion of the fitting engagement portion 26. Guide columns 30 are formed diagonally. These guide columns 30 are connected to the mounting surface 12 of the bottom portion 14 of the clip 10.

Between the pair of guide columns 30 of the base 28,
Each notch 34 is formed, and these notches 34
Inside, a pair of locking columns 36 are provided in parallel with the guide columns 30. Further, on the outer side surfaces of the pair of locking posts 36,
Retaining claws 38 are formed respectively.

As shown in FIG. 5, a rectangular tubular actuating frame 40 is formed in the middle of the pair of locking columns 36 of the clip 10, and the inner part of the actuating frame 40 serves as an actuating hole 42. Has become. The pair of locking columns 36 and the operating frame 40 are connected to each other by a pair of plate-shaped bridging portions 44.

As shown in FIGS. 6 and 7, the operating hole 42
When a removal tool 46 such as a screwdriver is inserted into the operating frame 40 and the operating frame 40 is rotated in the counterclockwise direction (direction of arrow A in FIG. 7) by a predetermined angle θ as shown in FIG. 7,
Locking column 36 connected to the operating frame 40 by a bridging portion 44
The locking claw 38 of is moved from the engagement position shown in FIG. 6 to the release position shown in FIG. 7.

As shown in FIG. 8, in the assembled state, the fitting engagement portion 26 of the clip 10 has a rectangular shape with a through hole 51 formed in the carpet 50 and a body panel 48 serving as a fixing member. Through the mounting hole 49 of the locking claw 3
8 engages with the edge of the mounting hole 49. In this state,
The clip 10 causes the carpet 50 arranged on the body panel 48 to sink by a predetermined amount from the state before the clip is mounted as shown in FIG. 9, so that the carpet 50 is locked from the mounting surface 12 in consideration of the sinking margin. The position of the claw 38 is set.

In FIG. 8, reference numeral 52 is a scuff, reference numeral 54 is piping, and reference numerals 56 and 58 are wire harnesses.

As shown in FIG. 7, the fitting engagement portion 26 of the clip 10 and the mounting hole 49 formed in the body panel 48.
A gap M is formed between the clip 1 and
It is easy to insert the zero fitting engagement portion 26 into the mounting hole 49. Furthermore, when the locking claw 38 is in the release position, a gap N is formed between the actuation frame 40 and the guide column 30, and if the turning angle of the actuation frame 40 is increased, the actuation is performed. The frame 40 comes into contact with the guide column 30 that acts as a stopper and prevents further rotation, so that the clip 10 can be protected from overload due to the removal tool.

Next, the operation of the first embodiment will be described. In the structure for attaching and detaching the engaging portion of the first embodiment, the fitting engaging portion 26 of the clip 10 has the through hole 51 formed in the carpet 50.
When pressed into a rectangular mounting hole 49 formed in the body panel 48 as a fixing member, the locking claw 38 at the target position of the base portion 28 causes the edge of the through hole 51 and the edge of the mounting hole 49. Due to the pressure received from the operating frame 40, as shown in FIG.
The locking claw 38 is rotated by elastic deformation in the direction.
Moves from the engagement position shown in FIG. 6 to the release position shown in FIG. 7, and passes through the through hole 51 and the attachment hole 49. When the locking claw 38 passes through the through hole 51 and the mounting hole 49, the operating frame 40 rotates in the direction opposite to the arrow A direction in FIG. 7, so that the locking claw 38 moves from the release position shown in FIG. Figure 6
Moves to the engagement position shown in FIG. 3 and engages with the edge of the mounting hole 49.

Therefore, the mounting hole 49 may be provided at the position of the body panel 48 for locking the clip 10, and it is not necessary to weld the T stud. Therefore, welding work by a welding machine is not necessary. Further, the workability of assembling is improved without the worker or the interior materials such as the carpet 50 and the wire harnesses 56, 58 being caught on the T-studs when the interior materials are assembled. Further, it is not necessary to provide the clip 10 with a protective wall for preventing the harness or the like from interfering with the T-stud. Further, the mounting position accuracy of the clip 10 is improved by using the mounting hole 49 instead of the T stud.

On the other hand, when the clip 10 is to be removed from the mounting hole 49 of the body panel 48, a removing tool 46 such as a screwdriver is inserted into the operating hole 42 formed in the operating frame 40, and the operating frame 40 is removed as shown in FIG. 6 is rotated counterclockwise in the counterclockwise direction (direction of arrow A in FIG. 7) by a predetermined angle θ, the locking claws 38 of the locking columns 36 connected to the operating frame 40 by the bridging portions 44 are shown in FIG. By moving from the engagement position shown to the release position shown in FIG.
1 and the mounting hole 49 can be easily passed. Therefore, since the clip 10 can be easily removed from the mounting hole 49 of the body panel 48, the workability of attachment and detachment can be improved.

Further, in the structure for attaching and detaching the engaging portion of the first embodiment, even if the engaging margin of the engaging pawl 38 with the edge of the mounting hole 49 is set to be large, the engaging pawl 38 is engaged at the engaging position. Since the clip 10 can be easily removed from the attachment hole 49 of the body panel 48 by moving from the to the release position, the engagement allowance of the engagement claw 38 can be increased, and as a result, the engagement strength can be increased. be able to.

Further, in the detaching structure of the engaging portion of the first embodiment, since the engaging claw 38 can be moved from the engaging position to the releasing position by rotating the removing tool 46 such as a driver. Good workability.

Further, in the detaching structure of the engaging portion of the first embodiment, when the removing tool 46 such as a driver is rotated by a predetermined angle, the operating frame 40 comes into contact with the guide column 30 acting as a stopper, In order to prevent the above rotation,
The clip 10 can be protected from overload caused by the removal tool.

Next, a second embodiment of the attachment / detachment structure of the engaging portion according to the present invention will be described with reference to FIGS. 10 and 11.

As shown in FIG. 10, the clip 60 of the second embodiment is a fastening clip for fastening a carpet to a body panel or the like, and has a circular shape in plan view.

As shown in FIG. 11, a fitting engagement portion 64 is formed downward in the substantial center of the bottom portion 62 of the clip 60. Since the fitting engagement portion 64 has the same structure as the fitting engagement portion 26 of the clip 10 of the first embodiment, the description thereof will be omitted.

A cover portion 68 is openably and closably connected to the upper side of the bottom portion 62 of the clip 60 via a hinge portion 67, and a locking claw 69 is formed on the cover portion 68.
The locking claw 69 is formed in the engagement recess 62 formed on the bottom 62.
A can be engaged with A, and the locking claw 69 is used during normal use.
Is engaged with the engaging recess 62A.

As shown in FIG. 10, this clip 60
When removing from the mounting hole drilled in the fixing member,
With the engagement between the locking claw 69 and the engagement recess 62A released and the cover 68 open, a tool for removing a driver or the like is provided in the operation hole 65 of the fitting engagement portion 64 as in the first embodiment. Insert and do.

Therefore, also in the clip 60 of the second embodiment, the same effect as that of the clip 10 of the first embodiment can be obtained.

Next, a third embodiment of the attachment / detachment structure of the engaging portion according to the present invention will be described with reference to FIGS.

As shown in FIG. 12, in the third embodiment, the fitting engagement portion 72 of the clip 70 is different from the fitting engagement portions of the first and second embodiments. That is, this third
In the clip 70 of the embodiment, a pair of guide pillars 76 having a U-shaped cross section are formed at opposing portions of a rectangular cylindrical base portion 74 that constitutes an outer peripheral portion of the fitting engagement portion 72.

As shown in FIG. 13, these guide columns 76 are connected to the mounting surface 80 of the bottom 78 of the clip 70.

As shown in FIG. 12, notches 82 are formed between the pair of guide columns 76 of the base 74.

As shown in FIG. 13, these notches 82
A pair of locking pillars 84 are formed on the shafts in parallel with the guide pillars 76. Locking claws 86 are formed on the outer surfaces of the pair of locking posts 84, respectively. In addition, a pair of locking claws 86
Are connected to each other by a working band portion 88 as a bridging portion. The operating band portion 88 is V-shaped in a side view, and the operating band portion 88 is a tool for removing a driver 4 or the like.
When it is pressed downward by 6, the removal tool 46 is guided along the V-shape to the central portion in the longitudinal direction.

As shown in FIGS. 14 and 15, when the operating band portion 88 is further pressed downward by the removal tool 46, the operating band portion 88 bends downward, and the locking claw 86 is integrally formed inside. To a release position where the dimension L between the pair of locking claws 86 is smaller than the inner diameter S of the mounting hole 49 formed in the body panel 48 as a fixing member.

Next, the operation of the third embodiment will be described. In the attachment / detachment structure of the engagement portion of the third embodiment, the fitting engagement portion 72 of the clip 70 is provided with the through hole 51 formed in the carpet 50.
When pressed into a mounting hole 49 formed in the body panel 48 as a fixing member, the locking claw 86 at the target position of the base 74 receives pressure from the edge of the through hole 51 and the edge of the mounting hole 49. As a result, the operating band portion 88 is bent downward by elastic deformation, so that the locking claw 86 is moved to the position shown in FIGS.
It moves from the engagement position shown in FIG. 3 to the release position shown in FIGS. 14 and 15, and passes through the through hole 51 and the mounting hole 49. When the locking claw 86 passes through the through hole 51 and the mounting hole 49, the operating band portion 88 and the locking claw 86 move from the release position shown in FIGS. 14 and 15 to the engagement position shown in FIGS. 12 and 13. It moves and engages the edge of the mounting hole 49.

Therefore, the mounting hole 49 may be formed at the position of the body panel 48 for locking the clip 70, and it is not necessary to weld the T stud. Therefore, welding work by a welding machine is not necessary. In addition, the workability of assembling is improved without the worker or the interior material such as the carpet or the wire harness being caught on the T-stud during the assembling of the interior material. Also,
It is not necessary to provide the clip 70 with a protective wall for preventing the harness or the like from interfering with the T-stud. Also,
Clip 7 by mounting hole 49 instead of T stud
The mounting position accuracy of 0 is improved.

On the other hand, when the clip 70 is to be removed from the mounting hole 49 of the body panel 48, the operating band 88 is pressed downward by the removal tool 46 such as a screwdriver, and the removal tool 46 follows the V-shape. It is guided to the central part in the longitudinal direction. By the removal tool 46, the operating band 88
When is further pressed downward, the operating band portion 88 bends downward,
The locking claw 86 moves inward integrally with this, and the release position where the dimension L between the pair of locking claws 86 is smaller than the inner diameter S of the mounting hole 49 formed in the body panel 48 as the fixing member. As a result, the locking claw 86 can easily pass through the through hole 51 and the mounting hole 49. Therefore, since the clip 70 can be easily removed from the mounting hole 49 of the body panel 48, the workability of attachment and detachment can be improved.

Further, in the detaching structure of the engaging portion of the third embodiment, even if the engaging margin of the engaging pawl 86 with the edge of the mounting hole 49 is set to be large, the engaging pawl 86 is engaged at the engaging position. Since the clip 70 can be easily removed from the attachment hole 49 of the body panel 48 by moving from the to the release position, the engagement allowance of the engagement claw 86 can be increased, and as a result, the engagement strength can be increased. be able to.

Further, in the detaching structure of the engaging portion of the third embodiment, the engaging claw 86 can be moved from the engaging position to the releasing position by the pressing operation of the removing tool 46 such as a screwdriver. Good nature.

In each of the above-described embodiments, each locking claw 38, 86 is a pair, but the number of locking claws is not limited to this, and a plurality may be formed.

[0049]

According to the first aspect of the present invention, there is provided a structure for attaching and detaching a locking member, wherein the fixing member is provided at a position opposite to the mounting hole formed in the fixing member and the fitting engaging portion of the locking member. A pair of locking claws that are movable to an engaging position that engages the edge of the mounting hole and a release position that does not engage the edge of the mounting hole of the fixing member, and a locking claw provided on the locking member. And a bridging portion for connecting the locking claws to each other and moving the locking claw from the engagement position to the release position by deformation,
Since it is configured to include, it is possible to improve the workability of assembling the interior material, the workability of attaching and detaching the locking member, and the locking strength without requiring welding work. Has excellent effect.

According to a second aspect of the present invention, there is provided an attachment / detachment structure for an engaging portion, wherein the attaching hole is provided in the fixing member and the engaging member of the engaging member is provided at a position opposite to the attaching hole to attach the fixing member. A plurality of locking claws that are movable to an engaging position that engages with the edge of the hole and a release position that does not engage with the edge of the mounting hole of the fixing member, and a removal tool that is provided on the locking member A bridge that connects an actuating frame having a possible actuating hole to the actuating frame and a plurality of engaging claws provided on the engaging member, and moves the engaging claw from the engaging position to the releasing position by rotating the operating frame. Since the structure is provided with the entanglement portion, it has the same excellent effect as in claim 1.

According to the detaching structure of the engaging portion of the present invention as set forth in claim 3, since the engaging member is provided with a stopper for restricting the rotation angle of the operating frame, the effect of claim 2 is obtained. It has an excellent effect that the locking member can be protected from an overload caused by the removal tool.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing a fitting engagement portion of a detaching structure of a locking portion according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a clip to which a structure for attaching and detaching a locking portion according to the first embodiment of the present invention is applied.

FIG. 3 is a plan view showing a clip to which a structure for attaching / detaching a locking portion according to the first embodiment of the present invention is applied.

FIG. 4 is a side view showing a clip to which the attaching / detaching structure of the engaging portion according to the first embodiment of the present invention is applied.

5 is a cross-sectional view taken along line 5-5 of FIG.

6 is a cross-sectional view taken along line 6-6 of FIG.

FIG. 7 is a cross-sectional view corresponding to FIG. 6, showing a released state of the fitting engagement portion of the locking portion detaching structure according to the first embodiment of the present invention.

FIG. 8 is a side sectional view showing a usage state of the clip to which the attachment / detachment structure of the engaging portion according to the first embodiment of the present invention is applied.

FIG. 9 is a side cross-sectional view showing a mounting hole of a fixing member of the detaching structure of the engaging portion according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a clip according to a second embodiment of the present invention.

FIG. 11 is a side view showing a clip according to a second embodiment of the present invention.

12 is a sectional view taken along line 12-12 of FIG.

FIG. 13 is an enlarged side cross-sectional view showing a fitting engagement portion of a locking portion detaching structure according to a third embodiment of the present invention.

14 is a cross-sectional view taken along line 14-14 of FIG.

FIG. 15 is an enlarged side sectional view showing a disengaged state of a fitting engagement portion of a desorption structure for a retaining portion according to a third embodiment of the present invention.

FIG. 16 is an enlarged perspective view showing a fitting engagement portion of a clip to which a detaching structure of a retaining portion according to a conventional example is applied.

[Explanation of symbols]

 10 Clip (Locking Member) 14 Bottom 26 Fitting Engaging Part 30 Guide Strut (Stopper) 38 Locking Claw 40 Operating Frame 42 Operating Hole 44 Bridging Part 46 Removal Tool 48 Body Panel (Fixing Member) 49 Mounting Hole 60 Clip 64 Fitting engagement portion 70 Clip 72 Fitting engagement portion 86 Locking claw 88 Operating band portion (bridge portion)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiaki Nishiyama 1 184 Maioka-cho, Totsuka-ku, Yokohama-shi, Kanagawa 1 Nifco Co., Ltd. (72) Kiyotani Kuniya 52, Yanagihara, Toei-cho, Anjo-shi, Aichi Japan Japan Welding shares Inside the company central sales office

Claims (3)

[Claims] 1. An attachment hole formed in a fixing member, an engagement position provided at a position facing a fitting engagement portion of a locking member and engaging with an edge portion of the attachment hole of the fixing member, and A pair of locking claws that are movable to a release position where they do not engage with the edge of the mounting hole of the fixing member, and the locking claws that are provided on the locking member to connect the locking claws to each other and deform the locking claws. And a bridge portion that moves from an engagement position to the release position. 2. An attachment hole formed in a fixing member, and an engagement position provided at a position facing the fitting engagement portion of the locking member and engaging with an edge portion of the attachment hole of the fixing member, and A plurality of locking claws that can be moved to a release position that does not engage the edge of the mounting hole of the fixing member, an operating frame that has an operating hole that is provided in the locking member and into which a removal tool can be inserted, A bridge portion provided on a member for connecting the operating frame and the plurality of locking claws and moving the locking claw from the engaging position to the releasing position by rotating the operating frame. Detachable structure of the locking part characterized by 3. The attachment / detachment structure of an engagement portion according to claim 2, wherein a stopper that restricts a rotation angle of the operation frame is provided on the engagement member.