JP6831085B2 - Fastening structure - Google Patents

Description

The present invention relates to a fastening structure for fixing a water-related member such as a drainage device to a drain port of a tank body.

Conventionally, as a fastening structure for fixing a drainage device to a drainage port of a tank body, for example, a fastening structure having a fastening member to be fastened to an operation joint which is a drainage device as described in Patent Document 1 is known. Has been done. In the fastening structure of Cited Document 1, the fastening member is rotated by a jig.

However, in the fastening structure of Cited Document 1, the jig can be removed from the fastening member even in an insufficient fastening state in which fastening is performed with a torque equal to or less than the predetermined value. Therefore, it is up to the builder to decide whether or not the fastening is performed with an appropriate torque. If the torque is insufficient and the fastening is insufficient, there is a risk of water leakage due to insufficient compression of the packing arranged between the fastening member and / or the operating joint and the tank wall. Leakage test is indispensable. That is, there is a problem that the member cost for the water leakage test and the work cost for the test are high.

Japanese Unexamined Patent Publication No. 2012-233384

The present invention has been devised in view of the above circumstances. That is, an object of the present invention is that when the fastening member is fastened to a water-related member such as a drainage device, it can be fastened with a constant torque and the construction quality is improved without depending on the skill of the builder. It is to provide a fastening structure that is possible.

The present invention includes a fastening member to be fastened to a water supply member and a fastening member.
An operation member for fastening and operating the fastening member is provided.
The operating member has an engaging portion that engages with the fastening member.
The fastening member has an engaged portion with which the engaging portion engages.
The fastening member is fastened to the water-circling member by being relatively rotated with respect to the water-circling member via the operating member, and the operating member is fastened to the water-circling member when the torque of the relative rotation reaches a predetermined value. The fastening structure is characterized in that the engagement state between the engaging portion and the engaged portion of the fastening member is released, and the engaging portion can be disengaged from the operating member.

According to the present invention, when the torque reaches a predetermined value, the operating member can be separated from the fastening member, so that the fastening can be performed with a constant torque and the construction quality does not depend on the skill of the builder. It is possible to provide a fastening structure capable of improving the above. In other words, since the sealing property between the tank wall of the drainage port and the water supply member is ensured without depending on the skill of the builder, the risk of water leakage is effectively reduced as compared with the conventional case.

The operating member has a contact portion for rotating the fastening member relative to the water-related member.
The fastening member has an abutted portion with which the abutting portion of the operating member abuts.
The contact portion may be adapted to overcome the contact portion when the torque of the relative rotation reaches a predetermined value.

In this case, since the torque limit mechanism is formed by the contact portion of the operating member and the contacted portion of the fastening member, it is possible to easily determine whether or not the fastening torque has reached a predetermined value.

In such a fastening structure, the operating member has a stopper portion for regulating the relative rotation amount of the operating member with respect to the fastening member.
The stopper portion may be adapted to come into contact with the contacted portion after the contacted portion has passed over the contacted portion.

In this case, after the torque limit mechanism is activated, the relative rotation amount of the operating member with respect to the fastening member can be suppressed to a predetermined amount or less, and the operating member can be smoothly separated from the fastening member.

Further, the fastening member has an annular outer shape that defines an opening through which the rotation axis is inserted.
The operating member is arranged in the opening of the fastening member.
The engaging portion of the operating member is an engaging claw that protrudes outward.
The engaged portion of the fastening member is a rib protruding inward.
The engaging claw and the rib may overlap each other when viewed from the direction of the rotation axis.

In this case, when the torque reaches a predetermined value, the engagement state between the engaging portion of the operating member and the engaged portion of the fastening member is released, and the fastening member can be disengaged from the operating member. Can be realized with a simple configuration.

The engaging claw may extend along the rotation axis direction of the operating member and elastically deform in the radial direction of the operating member. In this case, the operating member can be easily assembled to the fastening member.

Further, a hair catcher may be attached to the rib. In this case, the rib can be effectively utilized even after the fastening member is separated from the operating member.

In the above fastening structure, the engaging portion of the operating member is moved relative to the fastening member in the rotational direction of the operating member, so that the engaging portion of the operating member and the covering of the fastening member are covered. The engagement state with the engaging portion may be released.

In this case, since the engaged state between the engaged portion and the engaged portion is released by the rotation operation of the fastening member by the operating member, a separate disengagement operation for disengaging the fastening member from the operating member is unnecessary.

In the above fastening structure, the water supply member is, for example, a drainage device. Since the drainage device is installed on the floor or the bottom of the bathtub, it is always placed in a place where a person's load or water pressure is applied. Therefore, higher sealing performance is required. In response to such a requirement, according to the fastening structure of the present invention, the drainage device can be installed with particularly high reliability.

According to the present invention, when the torque reaches a predetermined value, the operating member can be separated from the fastening member, so that the fastening can be performed with a constant torque and the construction quality does not depend on the skill of the builder. It is possible to provide a fastening structure capable of improving the above. In other words, since the sealing property between the tank wall of the drainage port and the water supply member is ensured without depending on the skill of the builder, the risk of water leakage is effectively reduced as compared with the conventional case.

It is schematic cross-sectional view which shows the state which the fastening structure by one Embodiment of this invention is actually installed. It is the schematic upward perspective view of the fastening structure by one Embodiment of this invention. It is a schematic downward perspective view of the fastening structure of FIG. It is a schematic top view of the fastening structure of FIG. It is a schematic front view of the fastening structure of FIG. FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. It is the schematic perspective view of the fastening member constituting the fastening structure of FIG. It is a schematic top view of the fastening member of FIG. It is a schematic front view of the fastening member of FIG. FIG. 10 is a cross-sectional view taken along the line CC of FIG. It is a schematic bottom view of the fastening member of FIG. It is a schematic upward perspective view of the operation member which constitutes the fastening structure of FIG. It is a schematic downward perspective view of the operation member of FIG. It is a schematic top view of the operation member of FIG. It is a schematic front view of the operation member of FIG. FIG. 16 is a cross-sectional view taken along the line DD of FIG. It is a schematic bottom view of the operation member of FIG. It is a schematic top view which shows the fastening structure of FIG. 2 before the contact part gets over the contact part. It is a schematic partial enlarged view of FIG. It is a schematic top view which shows the fastening structure of FIG. 2 after the abutting part gets over the abutting part. It is a schematic partial enlarged view of FIG. FIG. 5 is an enlarged partial schematic cross-sectional view showing the fastening structure of FIG. 2 when the stopper is in contact with the contacted portion.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view showing a state in which the fastening structure 100 according to the embodiment of the present invention is actually installed. As shown in FIG. 1, the fastening structure 100 includes a fastening member 10 to be fastened to the drainage device 30, and an operating member 20 for fastening and operating the fastening member 10. The fastening structure 100 is for fastening and fixing the drainage device 30 arranged on the tank wall 41 of the drainage port 40 to the tank wall 41.

The schematic fastening mode according to the fastening structure 100 will be described as follows. That is, as shown in FIG. 1, the drainage device 30 and the fastening member 10 are screwed to each other, and both have flange portions 31 and 11 protruding outward. The flange portions 31 and 11 have a diameter larger than the inner diameter of the drain port 40. Then, the fastening member 10 and the drainage device 30 are arranged so that the flange portions 31 and 11 sandwich the tank wall 41 that defines the drain port 40, and the fastening members 10 and the drainage device 30 are fastened to each other so that the flange portions 31 and 11 are fastened to each other. The tank wall 41 is sandwiched by the tank wall 41, and the drainage device 30 is fixed to the tank wall 41. As shown in FIG. 1, a packing 42 is arranged on the tank wall 41, and when the drainage device 30 and the fastening member 10 are screwed together with a predetermined torque, the drainage device 30 and the tank wall 41 are liquid. It is designed to be tightly fixed.

Next, the fastening structure 100 according to the present embodiment will be described in detail with reference to FIGS. 2 to 18.

FIG. 2 is a schematic upward perspective view of the fastening structure 100 according to the present embodiment, FIG. 3 is a schematic downward perspective view of the fastening structure 100 of FIG. 2, and FIG. 4 is a fastening of FIG. It is a schematic top view of the structure 100, FIG. 5 is a schematic front view of the fastening structure 100 of FIG. 2, FIG. 6 is a sectional view taken along line AA of FIG. 5, and FIG. 7 is B of FIG. -B line sectional view. 8 is a schematic perspective view of the fastening member 10 constituting the fastening structure 100 of FIG. 2, FIG. 9 is a schematic top view of the fastening member 10 of FIG. 8, and FIG. 10 is a fastening of FIG. It is a schematic front view of the member 10, FIG. 11 is a sectional view taken along line CC of FIG. 10, and FIG. 12 is a schematic bottom view of the fastening member 10 of FIG. 13 is a schematic upward perspective view of the operating member 20 constituting the fastening structure 100 of FIG. 2, and FIG. 14 is a schematic downward perspective view of the operating member 20 of FIG. 13. FIG. Is a schematic top view of the operating member 20 of FIG. 13, FIG. 16 is a schematic front view of the operating member 20 of FIG. 13, and FIG. 17 is a sectional view taken along line DD of FIG. Is a schematic bottom view of the operating member 20 of FIG.

As shown in FIGS. 2 to 7, the fastening structure 100 includes a fastening member 10 and an operating member 20, which are assembled so as not to separate from each other. Details of the fastening member 10 and the operating member 20 are as follows.

The operating member 20 is for rotating the fastening member 10 when the fastening member 10 is screwed to the drainage device 30. In particular, as shown in FIGS. 13 to 18, the cylindrical operating member main body 22 and the radial outer side provided at one end (upper end in FIGS. 13, 16 and 17) of the operating member main body 22 in the axial direction. It has a flange portion 21 protruding from the cylinder.

In particular, as shown in FIG. 18, the operating member main body 22 is provided with four contact portions 23 as ridges on the outer surface. In the contact portion 23, the front surface (the surface on the tip direction side of the arrow) in the rotation direction D when the fastening member 10 is screwed to the drain device 30 forms an obtuse angle with respect to the outer surface of the operation member main body 22. It is formed as a tapered surface 23t. Further, the operating member main body 22 is adjacent to four engaging claws 25 arranged at equal intervals between two adjacent contact portions 23, and to the rear side of the contact portion 23 in the rotation direction D. It has a stopper portion 24 and the like. In other words, the operating member main body 22 has four sets of engaging claws 25, stopper portions 24, and contact portions 23 in this order on the outer surface thereof toward the front in the rotation direction D (counterclockwise in FIG. 18). Have been placed. In the present embodiment, the engaging claw 25 extends along the direction of the rotation axis L of the operating member 20, and can be elastically displaced in the radial direction of the operating member main body 22 as described later. ..

In particular, as shown in FIG. 18, the operating member main body 22 has an annular inner main body 22a and an annular outer main body 22b concentric with the inner main body 22a. The inner main body 22a and the outer main body 22b are connected by connecting portions 29 extending in the radial direction at a plurality of locations in the circumferential direction of the operating member main body 22. In particular, as shown in FIGS. 14, 16 and 18, each of the four contact portions 23, the stopper portion 24 and the engaging claw 25 are provided on the outer surface of the outer main body portion 22b. Further, as shown in FIG. 14, the contact portion 23 is formed on the outer surface of the double-sided beam structure 26 formed on the outer main body portion 22b along the rotation direction D. As a result, when a force acting inward in the radial direction of the operating member main body 22 acts on the abutting portion 23, the double-sided beam structure 26 bends and deforms, so that the abutting portion 23 moves inward in the radial direction. It is designed to be displaced. In the present embodiment, the double-sided beam structure 26 and the cantilever beam structure 27 are both provided at positions between two adjacent connecting portions 29, and are spaced apart from the inner main body portion 22a. It is vacant.

Further, as particularly shown in FIGS. 14 and 16, the engaging claw 25 is formed so as to extend along the direction of the rotation axis L (vertical direction in FIGS. 14 and 16) on the outer main body portion 22b. It is provided in the tip region of the cantilever structure 27. More specifically, the cantilever structure 27 has a fixed end in which the distal end from the flange 21 is connected to the outer main body 22b along the rotation axis L, and the flange 21 The end on the close side of is a free end. Then, an engaging claw 25 is formed in the vicinity of the free end. Then, the cantilever structure 27 bends and deforms in the radial direction of the operating member 20, so that the engaging claw 25 is elastically displaced in the radial direction.

Further, as shown in FIGS. 13 and 14, the flange portion 21 of the operating member 20 is provided with four tool engaging grooves 28 for engaging with the tool 50 at equal intervals along the circumferential direction. ing. Specifically, each tool engaging groove 28 is open toward the inside in the radial direction when viewed from above, so that the tool 50 having a “+” shape can be received.

Next, as shown in FIGS. 8 to 12, the fastening member 10 has a fastening member main body 12 having an annular outer shape that defines an opening 10a through which the rotation axis L is inserted, and an axial direction of the fastening member main body 12. The flange portion 11 is provided at one end (upper end in FIGS. 8, 10 and 11) and projects outward in the radial direction. The fastening member main body 12 is provided with a male screw portion 13 screwing with a female screw portion provided on the inner surface of the drainage device 30 (see FIG. 1) to be fastened on the outer surface.

Further, as shown in FIG. 9, in particular, the fastening member main body 12 has four ribs 14 arranged at equal intervals along the circumferential direction on the inner surface and one rib 14 adjacent to each other. It has four ridges 15 arranged at intervals. In particular, as shown in FIG. 8, all of the four ribs 14 are at the same position in the axial direction (thickness direction) of the fastening member main body 12 and closer to the flange portion 11 than the central position in the axial direction. It is placed in the position. Further, all of the four ridges 15 are arranged at the same position along the axial direction (thickness direction) of the fastening member main body 12 and at the same length along the axial direction. Each ridge 15 is formed as a tapered surface 15t whose rear surface in the rotation direction D when the fastening member 10 is screwed onto the drainage device 30 has an obtuse angle with respect to the inner surface of the fastening member main body 12. Further, as shown in FIG. 8, each ridge 15 has a tapered portion 15s near the upper end. The tapered portion 15s is for smoothly guiding the abutting portion 23 of the operating member 20 immediately after overcoming each ridge 15, with respect to the inner surface of the fastening member main body 12 in front of the rotation direction D. It has an obtuse angle.

The diameter of the opening 10a of the fastening member main body 12 is larger than the outer diameter of the outer main body portion 22b of the operating member 20 and smaller than the outer diameter of the flange portion 21 of the operating member 20. As a result, the operating member main body 22 of the operating member 20 is housed in the opening 10a, while the flange portion 21 of the operating member 20 interferes with the flange portion 11 of the fastening member 10, and the operating member 20 with respect to the fastening member 10 It is positioned in the direction of the rotation axis L of.

Returning to FIGS. 2 to 7, in the fastening structure 100, the fastening member 10 and the operating member 20 are assembled so as not to be detached from each other in the initial state. In this assembled state, the four engaging claws 25 of the operating member 20 are located below the four ribs 14 of the fastening member 10, and the engaging claws 25 and the ribs 14 overlap each other when viewed from above. ing. Further, in this assembled state, the contact portion 23 of the operating member 20 is positioned between the rib 14 of the fastening member 10 and the ridge 15 adjacent to the rib 14 in the front in the rotational direction D.

Further, as shown in FIG. 6, in the assembled state, the ridge 15 of the fastening member 10 is positioned adjacent to the front in the rotation direction D when viewed from the contact portion 23 of the operating member 20. Then, the operating member 20 can rotate relative to the fastening member 10 to some extent (with play) in a state of being assembled to the fastening member 10, but within the range of this relative rotation (play), When viewed from above, the engaging claw 25 and the rib 14 always overlap at least partially. That is, within the range of the relative rotation (play), the fastening member 10 does not separate from the operating member 20.

In the fastening structure 100 according to the present embodiment, a strainer such as a hair catcher can be installed on the rib 14 of the fastening member 10.

Next, the operation of the fastening structure 100 according to the present embodiment will be described with reference to FIGS. 19 to 23.

FIG. 19 is a schematic top view showing the fastening structure 100 before the contact portion 23 gets over the ridge 15, and FIG. 20 is a schematic partially enlarged view of FIG. 21 is a schematic top view showing the fastening structure 100 of FIG. 2 after the contact portion 23 has passed over the ridge 15, and FIG. 22 is a schematic top view of the region surrounded by the alternate long and short dash line in FIG. FIG. 23 is an enlarged partial schematic cross-sectional view showing the fastening structure 100 of FIG. 2 when the stopper portion 24 is in contact with the ridge 15.

First, the fastening member 10 and the operating member 20 are assembled to each other, and the initial state of the fastening structure 100 is realized (see FIGS. 2 to 7). Specifically, in a state where the operating member 20 is positioned above the fastening member 10, the fastening member is such that the four ribs 14 of the fastening member 10 and the four elastic claws of the operating member 20 overlap when viewed from above. Positioning of the operating member 20 with respect to 10 in the circumferential direction is performed. Then, the operating member 20 is press-fitted into the opening 10a of the fastening member 10 while maintaining the relative position in the circumferential direction. At the time of this press fitting, the engaging claw 25 of the operating member 20 is pressed inward in the radial direction by the rib 14 of the fastening member 10. As a result, the cantilever structure 27 bends inward in the radial direction of the operating member 20, and the engaging claw 25 gets over the rib 14. When the engaging claw 25 gets over the rib 14, the flange portion 21 of the operating member 20 comes into contact with the flange portion 11 of the fastening member 10, and the operating member 20 is positioned with respect to the fastening member 10 in the direction of the rotation axis L of the operating member 20.

Next, the fastening structure 100 in the initial state is screwed to the drainage device 30 arranged so as to sandwich the tank wall 41 of the drainage device 30 to be constructed (see FIG. 1). Specifically, as shown in FIGS. 19 and 20, in this screwing, a predetermined tool 50 is engaged with a tool engaging groove 28 provided in the operating member 20, and the operating member 20 is engaged with the tool 50. It is rotated relative to the drainage device 30. When the operating member 20 is rotated, the four contact portions 23 of the operating member 20 each contact the four ridges 15 of the corresponding fastening member 10, so that the fastening member 10 also integrally refers to the drainage device 30. Is rotated relative to each other. As a result, the fastening member 10 is screwed into the drainage device 30.

Then, when the torque of the relative rotation reaches a predetermined value, the double-sided beam structure 26 of the operating member 20 is bent and deformed inward in the radial direction, and the contact portion formed on the double-sided beam structure 26 is formed. 23 gets over the ridge 15 of the fastening member 10. At this time, since the tapered surfaces 15t and 23t provided on the ridge 15 of the fastening member 10 and the contact portion 23 of the operating member 20, respectively, come into contact with each other, the contact portion 23 smoothly gets over the ridge 15.

Immediately after getting over the ridge 15, the contact portion 23 is smoothly guided to the inner surface of the fastening member main body 12 by the tapered portion 15s of the ridge 15. In other words, immediately after the abutting portion 23 gets over the ridge 15, the bending of the double-sided beam structure 26 is gradually released, so that the abutting portion 23 is vigorously struck against the inner surface of the fastening member main body 12. There is no. Therefore, it is possible to avoid making a loud noise after the contact portion 23 gets over the ridge 15 and misunderstanding that the installer is damaged, or actually damaging the fastening member 10.

The state in which the contact portion 23 of the operating member 20 has overcome the ridge 15 of the fastening member 10 is shown in FIGS. 21 and 22. As can be seen from FIGS. 21 and 22, when the abutting portion 23 gets over the ridge 15 of the fastening member 10, all of the four engaging claws 25 of the operating member 20 are the fastening members when viewed from above. It is positioned between the rib 14 of 10 and the ridge 15. That is, when viewed from above, the state in which the rib 14 of the fastening member 10 and the engaging claw 25 of the operating member 20 overlap each other is released.

Then, the tool 50 is removed from the operating member 20, and then the operating member 20 is pulled out from the fastening member 10, and the fastening work between the fastening member 10 and the drainage device 30 is completed. As can be understood from the above description, since the contact portion 23 of the operating member 20 and the ridge 15 of the fastening member 10 function as a torque limiter, the fastening member 20 and the drainage device 30 can be fastened with an appropriate torque. Will be done.

As shown in FIG. 23, when the operation member 20 is further rotated by the tool 50 after the contact portion 23 gets over the ridge 15 of the fastening member 10, the contact portion 23 is fastened to the stopper portion 24 of the operating member 20. The protrusion 15 of the member 10 comes into contact with the ridge 15, and the relative rotation amount of the operating member 20 with respect to the fastening member 10 is restricted to a certain amount or less. Therefore, since the engaging claw 25 and the rib 14 are not engaged again, the operating member 20 is smoothly pulled out from the fastening member 10.

Then, a strainer (not shown) such as a hair catcher is installed on the rib 14 of the fastening member 10, and the construction of the drainage device 30 is completed.

According to the fastening structure 100 according to the present embodiment as described above, when the torque reaches a predetermined value, the operating member 20 can be detached from the fastening member 10, so that fastening with a constant torque is possible. , It is possible to provide a fastening structure 100 capable of improving construction quality without depending on the skill of the builder. In other words, since the sealing property between the tank wall 41 of the drain port 40 and the drain device 30 is ensured without depending on the skill of the builder, the risk of water leakage is effectively reduced as compared with the conventional case.

Further, the operating member 20 has a contact portion 23 for rotating the fastening member 10 relative to the drainage device 30, and the fastening member 10 has a ridge 15 with which the contact portion 23 of the operating member 20 abuts. The contact portion 23 is adapted to overcome the ridge 15 when the relative rotation torque reaches a predetermined value. Therefore, since the torque limit mechanism is formed by the contact portion of the operating member and the contacted portion of the fastening member, it is possible to easily determine whether or not the fastening torque has reached a predetermined value.

In such a fastening structure 100, the operating member 20 has a stopper portion 24 for regulating the relative rotation amount of the operating member 20 with respect to the fastening member 10, and the contact portion 23 of the stopper portion 24 has a ridge 15. After overcoming the above, it comes into contact with the ridge 15. Therefore, after the torque limit mechanism is activated, the relative rotation amount of the operating member 20 with respect to the fastening member 10 can be suppressed to a predetermined amount or less, and the operating member 20 can be smoothly separated from the fastening member 10.

Further, the fastening member 10 has an annular outer shape that defines an opening 10a through which the rotation axis L is inserted, and the operating member 20 is arranged in the opening 10a of the fastening member 10, and the engaging claw 25 and the rib 14 are arranged. Overlap each other when viewed from the direction of the rotation axis L. Therefore, when the torque reaches a predetermined value, the engagement state between the engaging claw 25 of the operating member 20 and the rib 14 of the fastening member 10 is released, and the fastening member 10 can be separated from the operating member 20. , Can be realized with a simple configuration.

Further, since the engaging claw 25 extends along the direction of the rotation axis L of the operating member 20 and is elastically deformed in the radial direction of the operating member 20, the operating member 20 can be easily assembled to the fastening member 10. be able to.

Further, since the hair catcher can be attached to the rib 14, the rib 14 can be effectively used even after the fastening member 10 is separated from the operating member 20.

Further, the engaging claw 25 of the operating member 20 is relatively moved with respect to the fastening member 10 in the rotational direction D of the operating member 20, so that the engaging claw 25 of the operating member 20 and the rib 14 of the fastening member 10 are engaged with each other. The combined state is released. Therefore, since the engaging state between the engaging claw 25 and the rib 14 is released by the rotation operation of the fastening member 10 by the operating member 20, a separate disengagement operation for disengaging the fastening member 10 from the operating member 20 is unnecessary. Is.

In the above description, the drainage device 30 has been described as an example of the water supply member, but the description is not limited to this. Examples of other water-related members to which the fastening structure according to the present invention can be applied include a through-opening for a push-one-way drain plug arranged at the top of the bathtub, a through-opening for drainage provided at the bottom of the bathtub, and the like. Alternatively, an additional cooking, a through opening of a circulation jet bath, etc. provided on the side of the bathtub can be mentioned. Alternatively, the fastening structure according to the present invention is applicable not only to the bathtub but also to any through opening that requires a water blocking structure, such as a through opening for water supply provided in a wall of a bathroom.

10 Fastening member 10a Opening 11 Flange part 12 Fastening member main body 13 Male thread part 14 Rib 15 Protrusion 15s Tapered part 15t Tapered surface 20 Operating member 21 Flange part 22 Operating member main body 22a Inner main body 22b Outer main body 23 Contact 23t Tapered surface 24 Stopper part 25 Engagement claw 26 Double-sided beam structure 27 Cantilever beam structure 28 Tool engagement groove 29 Connection part 30 Drainage device 31 Flange part 40 Drainage port 41 Tank wall 42 Packing 50 Tool 100 Fastening structure

Claims (8)

The fastening member to be fastened to the water supply member and
An operating member for fastening the fastening member and
With
The operating member has an engaging portion that engages with the fastening member.
The fastening member has an engaged portion with which the engaging portion engages.
The fastening member is fastened to the water-circling member by being relatively rotated with respect to the water-circling member via the operating member, and the operating member is fastened to the water-circling member when the torque of the relative rotation reaches a predetermined value. The fastening structure is characterized in that the engagement state between the engaging portion and the engaged portion of the fastening member is released, and the engaging portion can be separated from the operating member. The operating member has a contact portion for rotating the fastening member relative to the water-related member.
The fastening member has an abutted portion with which the abutting portion of the operating member abuts.
The fastening structure according to claim 1, wherein the contact portion gets over the contacted portion when the relative rotation torque reaches a predetermined value. The operating member has a stopper portion for regulating the relative rotation amount of the operating member with respect to the fastening member.
The fastening structure according to claim 2, wherein the stopper portion comes into contact with the contacted portion after the contacted portion has passed over the contacted portion. The fastening member has an annular outer shape that defines an opening through which the rotation axis is inserted.
The operating member is arranged in the opening of the fastening member.
The engaging portion of the operating member is an engaging claw that protrudes outward.
The engaged portion of the fastening member is a rib protruding inward.
The fastening structure according to any one of claims 1 to 3, wherein the engaging claws and the ribs overlap each other when viewed from the direction of the rotation axis in the engaged state . The fastening structure according to claim 4, wherein the engaging claw extends along the rotation axis direction of the operating member and elastically deforms in the radial direction of the operating member. The fastening structure according to claim 4 or 5, wherein a hair catcher can be attached to the rib. By moving the engaging portion of the operating member relative to the fastening member in the rotational direction of the operating member, the engaging portion of the operating member and the engaged portion of the fastening member are engaged with each other. The fastening structure according to any one of claims 1 to 6, wherein the combined state is released. The fastening structure according to any one of claims 1 to 7, wherein the water supply member is a drainage device.