JP6596241B2 - Drain plug device - Google Patents

Description

  The present invention relates to a drain plug device provided at a drain outlet of a tank body.

  Conventionally, as a drain plug device provided in a tank body (for example, a bathtub, a washbasin, etc.), it is arranged on a cylindrical drain port member inserted in a drain port of the tank body and an inner periphery of the drain port member. To transmit a driving force generated by displacement of a support shaft that can move up and down, a plug lid attached to the upper end of the support shaft, and a predetermined operation member (for example, an operation button or an operation handle) to the plug lid side. (For example, refer to patent document 1 etc.).

  In such a drain plug device, the plug lid includes a plug lid body portion that is formed in a disk shape and is supported by a support shaft, and an annular packing portion provided on the outer peripheral side of the back surface of the plug lid body portion. Yes. And when closing a drain port, it is common that a packing part is pressed along a perpendicular direction with respect to the taper-shaped part provided in the inner peripheral upper part of the tank or the drain port member (for example, patent) Reference 2 etc.).

JP 2004-116213 A JP 2010-53539 A

  However, in the above-described conventional technology, the diameter (seal diameter) of the contact portion of the packing portion with respect to the tank body and the drain port member is relatively large. Therefore, when opening the drain port, it is necessary to apply a relatively large force to the operation member. As a result, the operability is deteriorated or the drive from the operation member to the plug lid is performed. There is a possibility that a load applied to a member (transmission member or the like) located in the force transmission path may increase.

  In addition, since the seal diameter of the packing part is relatively large, it becomes difficult to bring the entire circumferential direction of the packing part into contact with the tank body and the drain port member when the drain port is closed (seal stability). May decrease) and may increase the manufacturing cost.

  The present invention has been made in view of the above circumstances, and an object thereof is to improve operability, seal stability, and the like, and more reliably reduce a load applied to members during operation. It is in providing the drain plug device which can be performed.

  In the following, each means suitable for solving the above-described object will be described in terms of items. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A cylindrical drainage port member inserted into the drainage port of the tank body;
The stopper lid main body provided approximately coaxially with the drain outlet member and can be moved up and down, and provided on the outer periphery of the stopper lid main body, and closes the drain outlet by contacting the drain outlet member. A stopper lid having an elastically deformable annular packing portion that is possible;
A drain plug device comprising a transmission member for transmitting a driving force due to displacement of a predetermined operation member to the plug lid side,
On the inner periphery of the drain port member is located on the water storage space side of the tank body, provided with an annular upward surface portion facing the water storage space side,
An annular corner is formed in the innermost peripheral portion of the upward surface portion,
The innermost peripheral portion of the corner portion is continuous with the inner peripheral surface of the drain port member configured to extend parallel to the central axis of the drain port member,
The drain plug device is configured so that the drain outlet is closed when the entire circumference of the packing portion contacts the corner portion.

  Note that “substantially coaxial” is not only the case where the drain port member and the plug lid body portion are provided strictly coaxially, but the central axis of the plug lid body portion with respect to the central axis of the drain port member. It is intended to include cases where the device is slightly tilted or shifted. In addition, the “corner” is not only the one where the apex portion has a strict angular shape, but the apex portion is somewhat rounded or flat when viewed microscopically. There may be. For example, a taper portion (chamfered portion) or a curved surface portion having a small width (for example, a width along the radial direction of the drain port member of 1 mm or less) may be present at the apex portion of the corner portion.

  According to the means 1, the drain port is closed by the entire circumference of the packing portion coming into contact with the annular corner located at the innermost circumference of the upward surface portion. Therefore, the diameter (seal diameter) of the contact portion of the packing portion with respect to the drain port member can be extremely reduced, and the force required to be applied to the operation member when the drain port is opened can be effectively reduced. Can do. As a result, the operability can be improved, and the load applied to the transmission member, the operation member, and the like during the operation can be more reliably reduced.

  Moreover, according to the said means 1, since the seal diameter of a packing part can be made small, the circumferential direction whole region of a packing part can be made to contact a corner | angular part more reliably at the time of closing of a drain outlet. Moreover, the material cost at the time of manufacturing a packing part can be reduced. Therefore, the seal stability can be improved and the manufacturing cost can be reduced.

  Mean 2. 2. The means 1 according to claim 1, wherein the entire region of the packing portion that can come into contact with the corner portion has a curved surface shape overlapping with a virtual spherical surface whose center is located on the central axis of the stopper lid main body portion. Drain plug device.

  According to the above means 2, the central axis of the plug lid main body part is slightly deviated or slanted due to the accuracy at the time of manufacturing or assembling the parts with respect to the central axis of the drain port member. Even if it exists, the perimeter of a packing part can be made to contact more reliably with respect to a corner | angular part. Thereby, when the drain outlet is closed, good water tightness can be obtained more reliably.

  Means 3. The drain plug device according to claim 1 or 2, wherein the plug lid is configured to be slightly movable relative to the drain port member along a radial direction of the drain port member.

  Note that “only slightly” means that the movable amount of the plug lid along the radial direction of the drain port member is, for example, the maximum when the central axis of the plug lid and the central axis of the drain port member are aligned. It means that it is suppressed to about 1 mm.

  According to the above means 3, when the drainage port is closed, the plug portion comes into contact with the corner portion so that the central axis of the plug lid main body portion and the central axis of the drainage port member are coaxial. Can be moved. Accordingly, the entire circumference of the packing portion can be more reliably brought into contact with the corner portion. Thereby, when the drain outlet is closed, better water tightness can be realized.

  Means 4. The drain plug device according to any one of means 1 to 3, wherein the corner portion has a right-angle shape in a cross section including a central axis of the drain port member.

  It should be noted that “the corner portion has a right-angled shape” means, in other words, that two surfaces sandwiching the corner portion extend substantially at a right angle. In consideration of safety, a slight curved portion (for example, about R1 mm) may be formed in the corner portion.

  According to the said means 4, the contact pressure of the packing part with respect to a corner | angular part can be made larger. As a result, even better watertightness can be obtained when the drain outlet is closed. In addition, since the seal diameter of the packing portion can be minimized, the operability can be further improved, and the load applied to the transmission member and the like during operation can be effectively reduced.

Means 5. The drain port member has a flange-like flange portion protruding radially outward at an upper end portion thereof,
Of the drain port member, the connecting surface that continues from the outer periphery of the corner portion to the upper end of the outer peripheral surface of the flange portion,
Basically, only the diameter-enlarged surface that gradually increases in diameter toward the upper side, or the diameter-enlarged surface that gradually increases in inner diameter toward the upper side and the central axis from the outermost periphery of the diameter-enlarged surface It is constituted by a surface composed of an orthogonal surface extending to the upper end of the outer peripheral surface of the flange portion along a direction orthogonal to the
5. The means according to claim 1, wherein a concave surface having a shape recessed toward a side away from a central axis of the drain port member is provided in the vicinity of the corner portion of the connecting surface. Drain plug device.

  In addition, you may provide the notch for engaging the tool for attachment, and a partial recessed part in the connection surface part of a drain outlet member. In this case, the said structure should just be satisfy | filled in the part except the said notch and the said partial recessed part among drain outlet members.

  According to the means 5, the surface from the outer periphery of the concave surface of the drain port member to the upper end of the outer peripheral surface of the flange portion can be made a smooth surface while forming a corner portion due to the presence of the concave surface. Accordingly, it is possible to improve the cleanability and aesthetics.

  Moreover, when the surface area from the corner to the upper end of the outer peripheral surface of the flange portion is a smooth taper surface, and the packing portion is in contact with the corner portion, the portion of the corner portion that contacts the packing portion is: The inclination angle can be very small (it can be in a state where it is slightly inclined with respect to the vertical direction). Thus, if the inclination angle of the corner portion that contacts the packing portion becomes very small, the packing portion enters the inner periphery of the drain port member when the drain port is closed. If the packing part enters into the inner periphery of the drain port member (bites in), a large operating force is required to open the drain port. In this regard, according to the means 5, the inclination angle of the corner portion that contacts the packing portion can be more reliably set to an appropriate size (for example, about 45 °). Therefore, the packing part with respect to the inner periphery of the drain port member can be prevented more reliably, and the operability can be further enhanced.

Means 6. The tank body is
An annular projecting portion on which the flange portion is mounted directly or indirectly;
An annular standing part erected on the outer periphery of the overhang part,
The drain plug device according to claim 5, wherein the upper end of the outer peripheral surface of the flange portion is substantially in contact with the standing portion over the entire area along the circumferential direction of the drain port member.

  Note that “substantially contact” is not only when the flange portion is strictly in contact with the standing portion, but there is a gap between the flange portion and the standing portion, but the gap is very It is meant to include the case where it is small (for example, 1 mm or less).

  According to the means 6, dirt is less likely to adhere between the outer periphery of the flange portion and the standing portion, and the cleaning performance can be further enhanced. In addition, since there is almost no gap between the outer periphery of the flange portion and the standing portion, a better aesthetic appearance can be realized.

It is a partially broken front view which shows the structure of a drain port apparatus or a plug lid side mechanism part. It is sectional drawing of an operating device. It is a partially expanded sectional view for demonstrating the internal peripheral surface shape etc. of a drain outlet member. It is a partially expanded sectional view for demonstrating the shape of a packing part. It is a partially broken front view which shows the drain port apparatus in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, the drain plug device 1 is attached to a basin 100 or the like as a tank body, and includes an operation device 2, a release wire 3, a plug lid side mechanism portion 4, and a drain port. And a device 5. The washbasin 100 includes a cylindrical standing portion 101 that extends downward and an annular protruding portion 102 that protrudes radially inward from the lower end of the standing portion 101. A drainage port 103 is formed on the inner periphery of the overhang portion 102.

  As shown in FIG. 2, the operating device 2 can reciprocate on a cylindrical guide portion 21 attached to a wall-like back guard 104 provided in the vicinity of the washbasin 100, and on the inner periphery of the guide portion 21. And an operation member 22 disposed on the surface. One end of the operation member 22 is attached to the other end of a transmission member 31 (to be described later) of the release wire 3.

  Further, an operation-side bending guide member 23 having a cylindrical shape that is bent substantially at a right angle is attached to the outer periphery of one end portion of the guide portion 21. And the other end part of the tube member 32 mentioned later of the release wire 3 is hold | maintained in the inner periphery of the operation side bending guide member 23. FIG.

  The release wire 3 includes a long transmission member 31 made of a wire or the like and a long cylindrical tube member 32 made of a resin or the like. The transmission member 31 is disposed on the inner periphery of the tube member 32, and reciprocates with respect to the tube member 32 as the operation member 22 is displaced.

  Returning to FIG. 1, the stopper lid side mechanism portion 4 includes a rod-shaped shaft portion 41 having a hole at the lower end portion, and a cylindrical inserted portion 42A through which the shaft portion 41 is vertically movable. And a bottom portion 43 that is screwed and fixed to the inner periphery of the lower end portion of the inserted portion 42A and prevents the shaft portion 41 from coming off from the inserted portion 42A. The bottom portion 43 includes a through hole extending in the axial direction of the shaft portion 41, and one end portion of the tube member 32 is held on the inner periphery of the through hole. On the other hand, the transmission member 31 can be arranged in the hole portion of the shaft portion 41 through the through hole. As the transmission member 31 moves forward, one end portion of the transmission member 31 pushes up the shaft portion 41, so that the shaft portion 41 moves upward, and when the transmission member 31 moves backward, the one end portion of the transmission member 31 The shaft 41 is moved downward by releasing the push-up of the shaft 41.

  The stopper lid side mechanism portion 4 is attached to the pipe 52 by placing the outer peripheral annular portion of the holding portion 42 on the stepped portion provided on the inner periphery of the pipe 52. In addition, the main body pipe 52A of the pipe 52 to be described later includes two members connected in series by screwing, and in the state where the other member is screwed to one member, the outer peripheral ring of the holding portion 42 is formed. The stopper lid side mechanism 4 may be attached to the pipe 52 by configuring the portion to be sandwiched between both members.

  In addition, the outer peripheral annular portion of the holding portion 42 and the inserted portion 42A are connected by a plurality of arm portions 42B provided at intervals along the circumferential direction of the inserted portion 42A. The drainage flows through the gaps between the arm portions 42B.

  The drain port device 5 includes a drain port member 51, a pipe 52, a lower collection member 53, a support shaft 54, a hair catcher 55, and a plug lid 56.

  The drain port member 51 is formed in a cylindrical shape, and is inserted into the drain port 103 so that its own central axis CL1 and the central axis of the drain port 103 substantially coincide with each other. In addition, the drain port member 51 has a flange-like flange portion 51A that protrudes radially outward at the upper end portion thereof, and has a male screw portion 51B on the outer periphery below the flange portion 51A. . The configuration of the inner peripheral portion of the drain port member 51 and the positional relationship between the flange portion 51A and the basin 100 will be described in detail later.

  The pipe 52 includes a cylindrical main body pipe 52A, and a cylindrical branch pipe 52B that is formed so as to protrude substantially horizontally from the outer periphery of the main body pipe 52A and whose internal space communicates with the internal space of the main body pipe 52A. ing.

  The main body tube 52A includes a female screw portion 52C that extends along the vertical direction and can be screwed into the male screw portion 51B on the inner periphery of one end portion (upper end portion) thereof. Then, after placing the flange portion 51A on the overhang portion 102, the male screw portion 51B is screwed into the female screw portion 52C, and the overhang portion 102 is sandwiched between the upper end surfaces of the flange portion 51A and the main body tube 52A. The pipe 52 is connected to the drain port member 51 and attached to the basin 100.

  In the present embodiment, an annular seal member 57 formed of an elastically deformable material is interposed between the upper end surface of the pipe 52 and the washbasin 100, and the seal member 57 discharges water. Water leakage from between the mouth member 51 and the pipe 52 and the basin 100 is prevented. In terms of preventing water leakage, a sealing member may be provided between the flange portion 51A and the washbasin 100.

  The branch pipe 52B is connected to an overflow port (not shown) provided in the wash basin 100 through a predetermined pipe so that drainage through the overflow port flows.

  The lower collection member 53 is disposed so as to be vertically movable in the pipe 52 (main body pipe 52A), and has an annular outer peripheral wall portion 53A and a lower collection member that extends inward from the inner periphery of the outer peripheral wall portion 53A. Part 53B.

  The outer peripheral wall 53A is arranged in the pipe 52 (main body pipe 52A) so as to be along the inner peripheral surface of the pipe 52 (main body pipe 52A). In the present embodiment, a slight gap (for example, about 1 mm) is formed between the outer peripheral wall 53A and the pipe 52 (main body pipe 52A). Thus, since the clearance gap between 53 A of outer peripheral walls and piping 52 (main body pipe | tube 52A) is made into a comparatively small thing, the movement along the radial direction of the lower collection member 53 is suppressed, and by extension, a support shaft 54 and the stopper lid 56 are prevented from tilting. That is, the lower collection member 53 also has a function of preventing the support shaft 54 and the plug lid 56 from tilting.

  The lower collection portion 53B has an inner peripheral portion fixed to the support shaft 54 and has a plurality of ribs extending along the radial direction of the outer peripheral wall portion 53A. In the lower collecting portion 53B, the waste water flowing through the main body pipe 52A flows down through the gap formed between the ribs, while the dust and the like contained in the waste water are collected.

  The support shaft 54 has a rod shape, and an upper end portion of the support shaft 54 is attached to the center of the back surface of the stopper lid 56. Further, since the lower end portion of the support shaft 54 is placed on the shaft portion 41, the support shaft 54 is supported by the shaft portion 41 in the pipe 52 (main body tube 52A) (however, the shaft portion). In the state where 41 is arranged at the lowest position, the shaft portion 41 is separated from the lower end portion of the support shaft 54). When the shaft 41 moves up and down to move the support shaft 54 up and down, the lower collection member 53 and the plug lid 56 move up and down together with the support shaft 54.

  The hair catcher 55 extends from the outer periphery of the support shaft 54 toward the outer periphery, and has a function of collecting dust and the like contained in the drainage flowing through the main body pipe 52A.

  The plug lid 56 includes a disk-shaped plug lid main body portion 56A made of resin or the like, and a packing portion 56B attached to the plug lid main body portion 56A.

  The plug lid main body portion 56A is provided substantially coaxially with the drain port member 51, and a cylindrical portion 56C extending downward is formed on the outer peripheral side of the back surface thereof. And the said packing part 56B is engage | inserted with respect to the outer periphery of the said cylindrical part 56C.

  The packing portion 56B is formed in an annular shape from an elastically deformable material (for example, rubber or resin). When the shaft portion 41 is moved downward along with the displacement of the operation member 22, the plug lid 56 is moved downward together with the lower collecting member 53 and the support shaft 54, and the entire outer peripheral portion of the packing portion 56 </ b> B is moved to the drain port member 51. By contact, the drainage port 103 is closed. On the other hand, when the shaft portion 41 moves up with the displacement of the operation member 22, the plug lid 56 moves up together with the lower collection member 53 and the support shaft 54, and the packing portion 56 </ b> B moves away from the drain port member 51. Thus, the drainage port 103 is opened. The shape of the outer peripheral portion of the packing portion 56B will be described in detail later.

  In the present embodiment, the shaft portion 41 is in contact with the lower end portion of the support shaft 54 when the drain port 103 is opened, but the shaft portion 41 is the lower end portion of the support shaft 54 when the drain port 103 is closed. It is designed to be separated from Thereby, when the drainage port 103 is closed, the packing part 56B can be reliably brought into contact with the drainage port member 51, and good watertightness can be obtained.

  In this embodiment, by pulling up the plug lid 56 and the support shaft 54 from the front side of the basin 100, the unit 58 including the lower collection member 53, the support shaft 54, the hair catcher 55, and the plug lid 56 is removed from the pipe 52. It can be removed at once. For this reason, it is possible to improve maintenance and cleaning properties.

  In addition, as described above, since a slight gap is formed between the outer peripheral wall 53A and the pipe 52 (main body pipe 52A), the plug lid 56 is drained along the radial direction of the drain port member 51. It is relatively movable with respect to the mouth member 51 (for example, about 1 mm).

  Next, the shape of the inner peripheral portion of the drain port member 51 and the positional relationship between the flange portion 51A and the basin 100 will be described in detail.

  In the present embodiment, as shown in FIG. 3, the drain port member 51 is provided on the inner circumference thereof on the water storage space side of the basin 100 and provided with an upward surface portion 51 </ b> C facing the water storage space side (upper side). It has been. The upward surface portion 51 </ b> C has an annular shape centered on the central axis CL <b> 1 and has a certain width along the radial direction of the drain port member 51. Furthermore, an angular corner 51D having an annular shape is formed on the innermost peripheral portion of the upward surface portion 51C. In the present embodiment, the corner 51D has a right-angle shape in a cross section including the central axis CL1. Note that “the corner 51D forms a right angle” may mean that two surfaces of the drain port member 51 sandwiching the corner 51D extend substantially at a right angle. In addition, a plurality of convex portions 51E (see FIG. 1) for engaging a predetermined tool are formed at equal intervals along the circumferential direction in the lower portion of the inner periphery of the drain port member 51.

  In the present embodiment, the corner portion 51D has a slightly rounded apex portion. And in this embodiment, it is comprised so that the drain outlet 103 may be closed when the perimeter of the packing part 56B contacts the vertex part of the said corner | angular part 51D. In addition, an inclination angle of a portion of the corner portion 51D that contacts the packing portion 56B (an acute angle among angles formed by the tangent line that contacts the portion of the corner portion 51D that contacts the packing portion 56B and the central axis CL1) is as follows. For example, the angle is about 45 °.

  In addition, of the inner peripheral surface of the drain port member 51, the connecting surface 51F (the portion excluding the corner portion 51D from the upward surface portion 51C) that is continuous from the outer periphery of the corner portion 51D to the upper end of the outer peripheral surface of the flange portion 51A is basically (Excluding a concave surface 51G to be described later) is an enlarged surface whose inner diameter gradually increases toward the upper side. However, an annular concave surface 51G having a shape recessed toward the direction away from the central axis CL1 of the drain port member 51 is formed in the vicinity of the corner portion 51D in the connecting surface 51F.

  Furthermore, in the present embodiment, the upper end of the outer peripheral surface of the flange portion 51 </ b> A is substantially in contact with the standing portion 101 in the entire region along the circumferential direction of the drain port member 51. Note that “substantially contact” is not only when the upper end of the outer peripheral surface of the flange portion 51A is strictly in contact with the standing portion 101, but also between the upper end of the outer peripheral surface of the flange portion 51A and the standing portion 101. This is intended to include the case where there is a gap between them but the gap is very small (for example, 1 mm or less).

  Next, the shape of the outer peripheral surface of the packing part 56B will be described. In this embodiment, the predetermined site | part of the outer peripheral surface of the packing part 56B is made into the predetermined curved surface shape. More specifically, as shown in FIG. 4, the entire area of the packing portion 56B that can come into contact with the corner portion 51D is curved so as to overlap the virtual spherical surface VS where the center CP is located on the central axis CL2 of the plug lid main body portion 56A. It is assumed to be planar.

  As described above in detail, according to the present embodiment, when the drainage port 103 is closed, the packing portion 56B comes into contact with the corner portion 51D, and therefore the diameter of the contact portion of the packing portion 56B with respect to the drainage port member 51 (seal (Diameter) can be made extremely small. Therefore, the force required to be applied to the operation member 22 when opening the drainage port 103 can be effectively reduced. As a result, the operability can be improved, and the load applied to the transmission member 31, the operation member 22, the plug lid side mechanism portion 4 and the like during the operation can be reduced more reliably.

  Further, since the seal diameter of the packing portion 56B can be reduced, the entire circumferential direction of the packing portion 56B is more reliably brought into contact with the corner portion 51D when the drainage port 103 is closed as compared with the case where the seal diameter is large. be able to. Moreover, the material cost at the time of manufacturing the packing part 56B can be reduced. Therefore, the seal stability can be improved and the manufacturing cost can be reduced.

  Furthermore, since the entire region of the packing portion 56B that can come into contact with the corner portion 51D has a curved surface that overlaps the virtual spherical surface VS, the central axis of the plug lid main body portion 56A with respect to the central axis CL1 of the drain port member 51. Even when CL2 is slightly shifted or slanted due to accuracy or the like at the time of manufacturing or assembling parts, the entire circumference of the packing portion 56B is more reliably brought into contact with the corner portion 51D. be able to. Thereby, when the drainage port 103 is closed, good water tightness can be obtained more reliably.

  In addition, since the plug lid 56 is relatively movable along the radial direction with respect to the drain port member 51, when the packing portion 56B contacts the corner portion 51D when the drain port 103 is closed, The plug lid 56 can be moved so that the central axis CL2 of the plug lid main body portion 56A and the central axis CL1 of the drain port member 51 are coaxial. Accordingly, the entire circumference of the packing portion 56B can be more reliably brought into contact with the corner portion 51D, and even better water tightness can be realized when the drainage port 103 is closed.

  Further, by providing the drain port member 51 with the concave surface 51G, the surface from the outer periphery of the concave surface 51G to the upper end of the outer peripheral surface of the flange portion 51A in the drain port member 51 can be made smooth while forming the corner portion 51D. it can. Accordingly, it is possible to improve the cleanability and aesthetics.

  Furthermore, the presence of the concave surface 51G makes it possible to more reliably set the inclination angle of the portion of the corner portion 51D that contacts the packing portion 56B to an appropriate size. Therefore, the packing part 56B with respect to the inner periphery of the drain port member 51 can be prevented more reliably, and the operability can be further enhanced.

  In addition, since the upper end of the outer peripheral surface of the flange portion 51A substantially comes into contact with the standing portion 101, it becomes difficult for dirt to adhere between the outer periphery of the flange portion 51A and the standing portion 101, thereby further improving the cleaning performance. it can. In addition, since there is almost no gap between the outer periphery of the flange portion 51A and the standing portion 101, a better aesthetic appearance can be realized.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above-described embodiment, the vertical movement of the shaft portion 41 is transmitted to the plug lid 56 via the support shaft 54, but the vertical movement of the shaft portion 41 is not performed via the support shaft 54. It may be configured to be transmitted directly to 56. Therefore, for example, as shown in FIG. 5 (note that piping etc. are not shown in FIG. 5), the drain port device 6 can contact the other end of the transmission member 31 to the lower end and It is good also as providing the support shaft mechanism 65 which has the rod-shaped axial part 63 to which the stopper cover 66 was attached, and the to-be-inserted part 64 which hold | maintains the said axial part 63 so that a vertical movement is possible in the outer periphery. The support shaft mechanism 65 is attached directly to the drain port member 61 or indirectly via an interposition part such as an attachment member 67 attached to the drain port member 61.

  When such a support shaft mechanism 65 is used, an attachment member is provided between the outer periphery of the upper end portion of the shaft portion 63 and the plug lid 66, or between the outer periphery of the shaft portion 63 and the inner periphery of the insertion portion 64. By providing a slight gap (play) between 67 and the support shaft mechanism 65, the plug lid 66 is configured to be slightly movable relative to the drain port member 61 along its radial direction. Also good.

  (B) In the above-described embodiment, the connecting surface 51F of the drain port member 51 is basically formed only by an enlarged surface whose inner diameter gradually increases toward the upper side, as shown in FIG. Further, the connecting surface 61F of the drain port member 61 has a diameter-enlarging surface whose inner diameter gradually increases toward the upper side, and a direction orthogonal to the central axis CL1 of the drain port member 61 from the outermost periphery of the diameter-expanded surface. The flange portion 61A may be formed by a surface including an orthogonal surface extending to the upper end of the outer peripheral surface. In addition, as shown in FIG. 5, when providing the partial recessed part 61E for engaging the tool for attachment in the upper surface of the drain port member 61 (flange part 61A), among the drain port members 61, the said In the portion excluding the recess 61E, the connecting surface 61F only needs to satisfy the above-described configuration.

  (C) In the above embodiment, the corner 51D has a rounded apex, but the shape of the corner is not limited to this. Therefore, for example, in the cross section including the central axis CL1 of the drain port member 51, the apex portion of the corner portion 51D may have a right angle shape or a chamfered shape.

  (D) In the said embodiment, although the washbasin 100 is illustrated as a tank body, the tank body which can apply the technical idea of this invention is not limited to a washbasin. Therefore, for example, the technical idea of the present invention may be applied to a bathtub or a kitchen sink.

  (E) The configuration of the operation device 2 and the installation location in the above embodiment are merely examples. Therefore, instead of the operation device that reciprocates, an operation device that rotates (rotates) the operation member and operates the transmission member 31 along with the rotation (rotation) operation may be used. . Moreover, it is good also as installing an operating device in tank bodies, such as a washbasin and a bathtub, and good also as installing in the structure provided in the vicinity of the tank body.

  (F) In the said embodiment, although the transmission member 31 is comprised by the wire etc. which can reciprocate the inner periphery of the tube member 32, the structure of a transmission member is not limited to this, For example, rotation You may comprise a transmission member by the universal joint etc. which can transmit force.

  (G) Although the packing part 56B in the said embodiment is a molded packing, a packing part is not restricted to this, For example, an O-ring and a flat packing may be sufficient.

  DESCRIPTION OF SYMBOLS 1 ... Drain plug apparatus, 22 ... Operation member, 31 ... Transmission member, 51 ... Drain port member, 51A ... Flange part, 51C ... Upward surface part, 51D ... Corner | angular part, 51F ... Connecting surface, 56 ... Plug lid, 56A ... Plug lid body part, 56B ... packing part, 100 ... basin (tank), 101 ... standing part, 102 ... overhang part, 103 ... drainage port, CL1 ... (center of drainage port member), CL2 ... ( Central axis of the lid lid main body part, CP... (Of the virtual spherical surface), VS.

Claims (6)

A cylindrical drainage port member inserted into the drainage port of the tank body;
The stopper lid main body provided approximately coaxially with the drain outlet member and can be moved up and down, and provided on the outer periphery of the stopper lid main body, and closes the drain outlet by contacting the drain outlet member. A stopper lid having an elastically deformable annular packing portion that is possible;
A drain plug device comprising a transmission member for transmitting a driving force due to displacement of a predetermined operation member to the plug lid side,
On the inner periphery of the drain port member is located on the water storage space side of the tank body, provided with an annular upward surface portion facing the water storage space side,
An annular corner is formed in the innermost peripheral portion of the upward surface portion,
The innermost peripheral portion of the corner portion is continuous with the inner peripheral surface of the drain port member configured to extend parallel to the central axis of the drain port member,
The drain plug device is configured so that the drain port is closed when the entire circumference of the packing portion contacts the corner portion.   2. The entire region of the packing portion that can come into contact with the corner portion has a curved surface shape that overlaps with a virtual spherical surface whose center is located on a central axis of the stopper lid main body portion. Drain plug device.   The drain plug device according to claim 1 or 2, wherein the plug lid is configured to be slightly movable relative to the drain port member along a radial direction of the drain port member.   The drain plug device according to any one of claims 1 to 3, wherein the corner portion has a right-angle shape in a cross section including a central axis of the drain port member. The drain port member has a flange-like flange portion protruding radially outward at an upper end portion thereof,
Of the drain port member, the connecting surface that continues from the outer periphery of the corner portion to the upper end of the outer peripheral surface of the flange portion,
Basically, only the enlarged surface whose inner diameter gradually increases toward the upper side or the expanded surface whose inner diameter gradually increases toward the upper side and the central axis from the outermost periphery of the expanded surface. It is constituted by a surface composed of an orthogonal surface extending to the upper end of the outer peripheral surface of the flange portion along a direction orthogonal to the
5. The concave surface having a concave shape toward the side away from the central axis of the drain port member is provided in the vicinity of the corner portion of the connecting surface. The drain plug device according to item. The tank body is
An annular projecting portion on which the flange portion is mounted directly or indirectly;
An annular standing part erected on the outer periphery of the overhang part,
6. The drain plug device according to claim 5, wherein the upper end of the outer peripheral surface of the flange portion is substantially in contact with the standing portion over the entire area along the circumferential direction of the drain port member. .

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