JP2021031970A - Drain plug device - Google Patents

Abstract

To provide a drain plug device capable of stably maintaining a sealing member in a curved shape.SOLUTION: The drain plug device comprises piping having a flow channel part and a branch part. The piping comprises: a tubular component that has a straight tubular straight pipe part and constitutes the flow channel part; a cylinder part that is attached to the tubular component and constitutes the branch part; a seal-corresponding part that protrudes from an outer circumference of the cylinder part and faces an outer circumferential surface of the straight pipe; and a seal member 13 that has a tubular part 131 arranged on the outer circumference of the cylinder part, and in which the tubular part 131 is sandwiched between the seal-corresponding part and the straight pipe part. The seal member 13 projects from at least one of inner and outer circumferences of the tubular part 131 and comprises a shape maintaining part 132 having the curved shape corresponding to the outer circumference of the straight pipe part, and the tubular part 131 can be maintained in a curved shape corresponding to the outer circumference of the straight pipe part in contact with the tubular part 131 in a single state of the seal member 13 by the shape maintaining part 132.SELECTED DRAWING: Figure 8

Description

The present invention relates to a drain plug device provided corresponding to a drain port of a tank body.

The drain plug device is provided with a plug lid provided corresponding to the drain port of the tank body (for example, a bathtub or a washbasin), and the drain port is opened and closed by moving the plug lid up and down. ..

The drain plug device includes a pipe having a straight tubular flow path portion that extends in the vertical direction and allows drainage that has passed through the drain port to flow, and is arranged in the flow path portion to support the plug lid and can move up and down. It is provided with a support shaft and a transmission member (for example, a wire) that transmits a driving force due to displacement of a predetermined operation unit (for example, an operation button) to the support shaft, and the support shaft and the plug lid are operated by operating the operation unit. It is generally known that the open / closed state of the drainage port is switched by moving the drainage port up and down.

Further, in recent years, the pipe is configured to include the flow path portion and a tubular branch portion that branches from the flow path portion and projects from the outer peripheral surface of the flow path portion, and the plug lid is closed. A rotatable drive unit formed with a support protrusion (support portion) for indirect support is inserted and installed in the branch portion, and the support protrusion moves up and down with the rotation of the drive portion. , A drain plug device configured to move the plug lid up and down has been proposed (see, for example, Patent Document 1 and the like).

Japanese Unexamined Patent Publication No. 2018-3347

By the way, the piping in the drain plug device having the above-mentioned drive unit and the like is usually made of one member (for example, resin or the like) integrally provided with the flow path portion and the branch portion. Therefore, in consideration of manufacturing cost and the like, it is conceivable to manufacture a pipe having a flow path portion and a branch portion by using a generally used straight tubular component (for example, a straight tubular pipe or the like). .. In this case, in addition to the tubular part constituting the flow path portion, a tubular portion (cylindrical component) constituting the branch portion is prepared, a through hole is formed in the tubular part, and the internal space of the tubular portion is a through hole. By attaching the tubular portion to the tubular component in a state of communicating with the internal space of the tubular component via the above, a pipe having a flow path portion and a branch portion can be obtained. Further, at this time, a seal corresponding portion that protrudes from the outer circumference of the cylinder portion over the entire circumference in the circumferential direction of the cylinder portion and faces the outer peripheral surface of the straight pipe portion located around the through hole is provided, and the cylinder portion is provided. It is conceivable to prevent water from leaking to the outside of the pipe through the through hole by sandwiching the annular seal member arranged on the outer circumference between the outer peripheral surface of the straight pipe portion and the seal corresponding portion. ..

By the way, in terms of more easily arranging the seal member along the outer peripheral surface of the tubular portion and ensuring good water stoppage more reliably and for a longer period of time, the seal member (particularly the straight pipe portion). And the part sandwiched between the seal-corresponding parts) is configured to have a curved shape (curved in the same direction as the outer circumference of the straight pipe part) so as to match the outer peripheral surface of the straight pipe part in contact with the seal member. Is preferable. However, it is not easy to stably maintain the sealing member alone in a curved shape.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drain plug device capable of stably maintaining a sealing member in a curved shape.

Hereinafter, each means suitable for solving the above object will be described in terms of terms. In addition, the action and effect peculiar to the corresponding means will be added as necessary.

Means 1. A lid that can move up and down to open and close the drain of the tank,
A tubular branch where drainage that has passed through the drainage port flows, and a tubular branch that protrudes from the outer circumference of the flow path so that its own internal space communicates with the internal space of the flow path. Piping that has a part and
A movable drive unit inserted through the branch portion and
It is provided with a support portion that is arranged in the flow path portion and directly or indirectly supports the plug lid.
A drain plug device configured so that the stopper lid moves up and down when the support portion moves up and down with the movement of the drive unit.
The piping
A tubular component constituting the flow path portion, which has a straight tube-shaped straight pipe portion at least in a part thereof and is provided with a through hole penetrating inside and outside the straight pipe portion.
It is attached to the tubular part with its end inserted through the through hole, and the tubular portion constituting the branch portion
A seal-corresponding portion that protrudes from the outer circumference of the cylinder portion over the entire circumference in the circumferential direction of the cylinder portion and faces the outer peripheral surface of the straight pipe portion located around the through hole.
It has an annular portion arranged on the outer periphery of the tubular portion, and also includes a seal member made of an elastically deformable material in which the annular portion is sandwiched between the seal corresponding portion and the straight pipe portion. ,
The sealing member includes a shape-maintaining portion that protrudes from at least one of the inner circumference and the outer circumference of the annular portion and has a curved shape corresponding to the outer circumference of the straight pipe portion.
The shape maintaining portion is characterized in that the sealing member can be maintained in a curved shape corresponding to the outer circumference of the straight pipe portion in contact with the annular portion while the sealing member is alone. Drain plug device.

The "curved shape corresponding to the outer circumference of the straight pipe portion" means that the shape is curved in the same direction as the outer circumference of the straight pipe portion, so that it fits perfectly with the outer peripheral shape of the straight pipe portion. It does not mean only a curved shape (a shape that curves with a radius of curvature substantially the same as the radius of curvature of the outer circumference of the straight pipe portion). Therefore, the "curved shape corresponding to the outer circumference of the straight pipe portion" includes a shape having a radius of curvature different from the radius of curvature of the outer circumference of the straight pipe portion and curved in the same direction as the outer circumference of the straight pipe portion.

According to the above means 1, the pipe having the flow path portion and the branch portion is configured by attaching the tubular portion constituting the branch portion to the tubular component constituting the flow path portion. Therefore, commonly used tubular parts (for example, straight tubular pipes) can be used, and an increase in cost related to the manufacture of pipes can be suppressed.

Further, the tubular portion is attached to the tubular component with its end inserted into the inner circumference of the through hole of the tubular component. Therefore, the tubular portion, that is, the branch portion can be provided more reliably and more easily depending on the target position in the tubular part with respect to the through hole. Thereby, the ease of manufacturing the pipe can be improved.

Further, according to the above means 1, in order to prevent water from leaking to the outside of the pipe through the through hole, the annular portion of the seal member is formed by the seal corresponding portion and the straight pipe portion protruding from the outer periphery of the tubular portion. Where it is sandwiched, the shape-maintaining portion provided on the seal member allows the annular portion to have a curved shape corresponding to the outer circumference of the straight pipe portion to be contacted, even if the seal member is in a single state. Can be maintained. Therefore, the annular portion can be more reliably maintained in a curved shape, and the annular portion can be more reliably brought into contact (fit) with the outer peripheral surface of the straight pipe portion in a state of being closely aligned. As a result, good water stopping property can be ensured more reliably and for a longer period of time.

Further, according to the above means 1, the shape maintaining portion has a curved shape corresponding to the outer circumference of the straight pipe portion, and by using the shape maintaining portion, the mounting direction (arrangement direction) of the seal member is erroneous. Can be prevented more reliably. As a result, the above-mentioned action and effect due to the curved shape of the annular portion can be more reliably exhibited.

Means 2. The pipe has an outer positioning portion that is in contact with or close to the outer periphery of the seal member.
The inner peripheral portion of the seal member is in contact with or close to the tubular portion, and the outer peripheral portion of the seal member is in contact with or close to the outer position defining portion. The drain plug device according to means 1, wherein the arrangement direction is uniquely determined.

The "inner peripheral portion of the seal member" means the inner peripheral portion of the inner shape maintaining portion when the shape maintaining portion has an inner shape maintaining portion protruding from the inner circumference of the annular portion, and refers to the inner peripheral portion of the annular portion. When the inner shape maintaining portion is not formed on the inner circumference, it means the inner peripheral portion of the annular portion. Further, the “outer peripheral portion of the seal member” means the outer peripheral portion of the outer shape maintaining portion when the shape maintaining portion has an outer shape maintaining portion protruding from the outer peripheral portion of the annular portion, and the outer peripheral portion of the outer shape maintaining portion is the outer peripheral portion. When the outer shape maintaining portion is not formed, it means the outer peripheral portion of the annular portion.

According to the above means 2, the arrangement position and the arrangement direction of the annular portion are uniquely arranged by bringing the inner peripheral portion and the outer peripheral portion of the seal member into contact with or close to the tubular portion and the outer position defining portion. Can be determined. That is, by installing the seal member so that the inner peripheral portion is in contact with or close to the tubular portion and the outer peripheral portion is in contact with or close to the outer position defining portion, the annular portion is naturally placed with respect to the target arrangement position. , It can be provided in the correct arrangement direction along the curved outer peripheral surface of the straight pipe portion. Therefore, it is possible to accurately and easily dispose of the annular portion in the correct disposition direction with respect to the target disposition planned position. Thereby, good water stopping property can be more reliably ensured.

Means 3. The drain plug device according to means 1 or 2, wherein the shape maintaining portion has an outer shape maintaining portion that protrudes from the outer periphery of the annular portion and is provided over the entire circumference of the annular portion in the circumferential direction.

According to the above means 3, the shape maintaining portion includes an outer shape maintaining portion that protrudes from the outer periphery of the annular portion and is provided over the entire circumference of the annular portion in the circumferential direction. With the outer shape maintaining portion configured in this way, the annular portion can be more firmly maintained in a curved shape. Therefore, the annular portion can be brought into contact with the outer peripheral surface of the straight pipe portion in a more stable state, and better water stopping property can be obtained.

Means 4. The drain plug device according to any one of means 1 to 3, wherein the shape maintaining portion is thinner than the annular portion.

According to the above means 4, since the shape-maintaining portion is thinner than the annular portion, the sandwiching pressure between the seal-corresponding portion and the straight pipe portion can be intensively applied to the annular portion. Thereby, the water stopping property can be further improved.

Means 5. The seal member has a visible confirmation portion for confirming that the seal member is correctly arranged in a state where the annular portion is sandwiched between the seal corresponding portion and the straight pipe portion. The drain plug device according to any one of the featured means 1 to 4.

The "confirmation portion" is, for example, a side provided on the outer edge of the seal member and capable of confirming whether or not the seal member is correctly arranged based on the degree of inclination and the positional relationship with other parts. Whether or not the seal member is correctly arranged based on the positional relationship between the portion and the protrusion protruding from the outer edge of the seal member and the predetermined notch (recess, etc.) as the portion to be arranged. It is possible to mention a protrusion that can be confirmed.

According to the above means 5, by looking at the confirmation portion, the seal member is correctly (correctly positioned) in the state where the annular portion is sandwiched between the seal corresponding portion and the straight pipe portion, that is, the seal member is arranged. It can be confirmed whether or not it is arranged (and in the orientation). Therefore, the annular portion can be arranged more accurately and in the correct position and orientation, and good water stopping property can be more reliably ensured.

It is a perspective view of the drain plug device. It is sectional drawing of the drain plug device. It is a side view of the drain plug device. FIG. 3 is a cross-sectional view taken along the line JJ of FIG. FIG. 5 is a perspective view of an integrated band component when viewed from the locking portion side in a state where the locking portion is locked with respect to the locked portion. It is a perspective view of the integrated band component when viewed from the cylinder part side in the state where the locking part is locked with respect to the locked part. It is a top view of the integrated band component in a state where the locking portion is not locked with respect to the locked portion. It is a perspective view of a seal member. It is a front view of the seal member. 9 is a cross-sectional view taken along the line KK of FIG. It is a bottom view of the drain plug device. In another embodiment, it is a perspective view of a seal member for showing an inner shape maintaining portion.

Hereinafter, one embodiment will be described with reference to the drawings. As shown in FIGS. 1 to 3, the drain plug device 1 is attached to a wash bowl 100 (see FIG. 2) as a tank body. In addition, in FIG. 1 and the like, the illustration of the wash bowl 100 is omitted.

The wash bowl 100 includes a bottom wall portion 101 that constitutes the bottom surface of the wash bowl 100, and a drain port 102 is formed through the bottom wall portion 101. Further, the wash bowl 100 is provided with an overflow port (not shown) for preventing the overflow of water, and the drainage flowing out through the overflow port flows into the inside of the bottom wall portion 101. A drainage space 103 is formed.

The drain plug device 1 includes a drain port member 2, a pipe 3, a plug lid drive mechanism 4, and a plug lid unit 5.

The drainage port member 2 is formed in a cylindrical shape, and is inserted into the drainage port 102 in a state where its own central axis and the central axis of the drainage port 102 are substantially aligned with each other. The drainage port member 2 includes a flange portion 21 formed so as to protrude outward in the radial direction at the upper end portion thereof, and a male screw portion 22 formed on the outer periphery below the collar portion 21. Further, a plurality of water passage holes 23 are formed through the drainage port member 2 at a portion between the flange portion 21 and the male screw portion 22 at intervals along the circumferential direction.

Then, with the drainage port member 2 being inserted into the drainage port 102 and the flange portion 21 of the drainage port member 2 being arranged on the bottom wall portion 101, the annular first nut member 9a having a female screw on the inner circumference is described. The drainage port member 2 is attached to the wash bowl 100 by being screwed to the male screw portion 22 and sandwiching the wash bowl 100 between the flange portion 21 and the first nut member 9a.

Further, between the wash bowl 100 and the drain port member 2 (flange portion 21) and between the wash bowl 100 and the first nut member 9a, elastically deformable materials (for example, resin, rubber, etc.) are used. The annular seal portions 7 and 8 formed by the above are interposed. These seal portions 7 and 8 prevent water leakage from between the drain port member 2 and the wash bowl 100. Further, a thin-walled annular washer component 6 that functions as a sliding ring is arranged between the first nut member 9a and the seal portion 8. In the state where the drain port member 2 is attached to the wash bowl 100, the seal portions 7 and 8 are in a state of being compressed and deformed, but in FIG. 2 and the like, the seal portions 7 and 8 in a state of not being compressed and deformed are shown. There is.

Further, in the state where the drain port member 2 is attached to the wash bowl 100, the water passage hole 23 is in a state of opening toward the drain space 103. As a result, the drainage that has passed through the overflow port flows through the drainage space 103 and the water passage hole 23 into the internal space of the drainage port member 2, that is, the drainage flow path.

The pipe 3 has a role of holding the plug lid drive mechanism 4 while forming a flow path for drainage flowing through the drain port 102. The pipe 3 includes a flow path portion 31 and a branch portion 32.

The flow path portion 31 extends along the vertical direction and constitutes a flow path for drainage flowing through the drain port 102. Further, the flow path portion 31 is provided with a folded-back portion 31a (see FIG. 2) that is bent outward at a substantially right angle at the upper end portion thereof. Then, in a state where the drainage port member 2, the annular inner seal portion 10 formed of an elastically deformable material, and the flow path portion 31 are arranged in series, a female screw is provided on the inner circumference and the end portion is inner circumference. The second nut member 9b provided with the inner flange is screwed into the male screw portion 22 while being locked to the folded-back portion 31a, and between the inner flange of the second nut member 9b and the lower end portion of the drainage port member 2. By sandwiching the folded-back portion 31a and the inner seal portion 10 in the water-tight state, the flow path portion 31 is connected in series to the drain port member 2 in a watertight state.

The branch portion 32 functions as a mounted portion of the plug lid drive mechanism 4. The branch portion 32 has a cylindrical shape as a whole, protrudes from the outer periphery of the flow path portion 31, and is in a state in which its own internal space communicates with the internal space of the flow path portion 31. Further, a collar-shaped attached collar portion 32a protruding outward is provided at an end portion of the branch portion 32 located on the opposite side of the flow path portion 31, and the attached collar portion 32a is provided with a plug. A locked hole 32b (see FIG. 2) for mounting the lid drive mechanism 4 is formed through. The locked hole portion 32b has a curved shape extending along the circumferential direction of the branch portion 32, and a plurality of (three in the present embodiment) are provided at intervals along the circumferential direction. ..

The plug lid drive mechanism 4 is a mechanism for moving the plug lid unit 5 up and down. The plug lid drive mechanism 4 has a rotatable rotating portion 41 and a support projection 42 that protrudes from the outer peripheral side of the tip surface of the rotating portion 41 and can move up and down with the rotation of the rotating portion 41. It is equipped (see FIG. 2 for each). In the present embodiment, the "rotating portion 41" corresponds to the "driving portion" and the "supporting projection 42" corresponds to the "supporting portion". Further, the plug lid drive mechanism 4 is installed in a state in which the support projection 42 is arranged in the flow path portion 31 while the rotating portion 41 is inserted through the branch portion 32 in a rotatable state. The support protrusion 42 is relatively short, and is configured so that its tip does not reach the center of the flow path portion 31.

Further, the stopper lid drive mechanism 4 is an inner wire 44 (FIG. 3) composed of an outer tube 43 having a long tubular shape and, for example, a stranded wire inserted into the inner circumference of the outer tube 43 so as to be reciprocally movable. See) and. An end portion of the outer tube 43 (not shown) is connected and fixed to an operating device (not shown) having a predetermined operating portion (for example, an operating button or an operating lever), and the inner wire 44 is displaced as the operating portion is displaced. It is designed to move back and forth. The plug lid drive mechanism 4 is configured so that the rotating portion 41 rotates with the reciprocating movement of the inner wire 44, and the support projection 42 moves up and down due to the rotation of the rotating portion 41. It has become. The operation unit may be manually displaced or electrically displaced. Of course, the plug lid drive mechanism 4 may have an energizing operation component such as a motor, and the rotating portion 41 may rotate with the operation of the energizing operation component. In this case, the outer tube 43 and the inner wire 44 may not be provided.

Further, the plug lid drive mechanism 4 has a mounting claw portion 45 (see FIG. 2) that is inserted into the locked hole portion 32b. The number of mounting claws 45 is provided in the same number as the number of locked holes 32b, and these mounting claws 45 are inserted into the respective locked holes 32b and locked to the mounted flange 32a. By setting the state, the plug lid drive mechanism 4 is attached to the branch portion 32.

The stopper lid unit 5 is provided corresponding to the drainage flow path in order to open and close the drainage port 102 and the like. The plug lid unit 5 has a plug lid support member 51 and a plug lid 52.

The plug lid support member 51 is for supporting the plug lid 52, and can move up and down along the inner peripheral surface of the drain port member 2 and the flow path portion 31 in the drain port member 2 and the flow path portion 31. It is arranged in the state. The stopper lid support member 51 is formed from a support shaft 51a having a cross shape in a plan view, an annular supported portion 51b (see FIG. 4) connected to the lower portion of the support shaft 51a, and a lower surface of the supported portion 51b. It is provided with a protruding pull-out prevention portion 51c (see FIG. 2). Note that FIG. 4 is a cross-sectional view taken along the line JJ of FIG.

The support shaft 51a is attached to a cylindrical portion whose upper end is provided in the central portion of the back surface of the stopper lid 52 by screwing, fitting, or the like. As a result, the stopper lid 52 is supported by the support shaft 51a. Further, the upper portion and the lower portion of the support shaft 51a have a blade shape protruding outward, and the outer edge portion of each blade shape portion is in a state of being close to the inner peripheral surface of the drain port member 2 and the flow path portion 31. It is arranged in. As a result, it is possible to suppress the displacement of the plug lid unit 5 along the horizontal direction and the inclination of the plug lid unit 5.

The supported portion 51b is provided so as to connect the outer edge portion of the lower blade-shaped portion of the support shaft 51a, and the outer peripheral surface is in a state of being close to the inner peripheral surface of the flow path portion 31. The lower surface of the supported portion 51b is supported by the support projection 42.

The pull-out prevention portion 51c has a predetermined hole, and the support projection 42 is inserted into the hole. The pull-out prevention portion 51c comes into contact with the support protrusion 42 when the plug lid unit 5 is pulled up to prevent the plug lid unit 5 from being pulled out from the drain port member 2 or the flow path portion 31 (that is, the drainage flow path). Has a role to play.

The plug lid 52 is for opening and closing the drain port 102, and is indirectly supported by the support protrusion 42 via the plug lid support member 51. The stopper lid 52 includes a disk-shaped stopper lid main body 52a made of resin or the like, and a packing portion 52b attached to the stopper lid main body 52a. The packing portion 52b is formed in an annular shape by an elastically deformable material (for example, rubber, resin, etc.), and is fitted in a recess that opens to the outside provided on the lower outer peripheral side of the stopper lid main body portion 52a. It is said that.

In the present embodiment, the rotating portion 41 rotates to one side and the support protrusion 42 moves downward while rotating, so that the plug lid support member 51 and the plug lid 52 move downward. Then, the entire outer peripheral portion of the packing portion 52b comes into contact with the drain port member 2, so that the drain port 102 is closed. On the other hand, when the rotating portion 41 rotates to the other side and the support protrusion 42 moves upward while rotating, the plug lid support member 51 and the plug lid 52 are lifted by the support protrusion 42. As a result, the packing portion 52b is separated from the drain port member 2, so that the drain port 102 is opened (see FIGS. 1 to 3).

In the present embodiment, the drain port 102 is closed, and when the support protrusion 42 is arranged at the lowest position, the plug lid support member 51 (supported portion 51b) floats from the support protrusion 42. It is configured as follows. Therefore, when the drain port 102 is closed, the packing portion 52b can be more reliably brought into contact with the drain port member 2, and good watertightness can be obtained.

Next, the configuration of the pipe 3 will be described in more detail. The pipe 3 in the present embodiment includes a tubular component 11 having a straight tubular portion 11a in at least a part (almost the whole in the present embodiment), and an integrated band component 12 which is a separate body from the tubular component 11. , A sealing member 13 (see FIGS. 2 and 4) for watertightly sealing between the tubular component 11 and the integrated band component 12.

The tubular component 11 constitutes the flow path portion 31, and is composed of commonly used tubular components (for example, a metal straight tubular pipe). Although the tubular component 11 is provided with a circular through hole 11b (see FIGS. 2 and 4) penetrating inside and outside, it is very simple and does not have a female screw or the like on the inner circumference.

As shown in FIGS. 5 and 6, the integrated band component 12 is a member (for example, resin or the like) including a tubular portion 121 constituting the branch portion 32 and a fastening portion 122 protruding from the outer circumference of the tubular portion 121. It is an integrated product consisting of. That is, the integrated band component 12 is formed by, for example, molding, and the tubular portion 121 and the fastening portion 122 are integrated in an inseparable state.

The tubular portion 121 has a cylindrical shape having an inner diameter substantially the same as the outer diameter of the tip surface of the rotating portion 41. Further, the inner end portion 121a of the tubular portion 121 slightly protrudes from the inner side surface of the fastening portion 122 (particularly, the seal corresponding portion 122a described later). In the present embodiment, by attaching the integrated band component 12 to the tubular component 11, the tubular portion 121 is attached to the tubular component 11 with the inner end portion 121a inserted into the inner circumference of the through hole 11b. However, in a state where the inner end portion 121a is inserted through the inner circumference of the through hole 11b, the inner end portion 121a does not protrude into the tubular part 11 (flow path portion 31), or the tubular part 11 (flow path portion). 31) is in a state where it hardly protrudes from the inner peripheral surface (for example, a state in which the amount of protrusion is suppressed to 3 mm or less).

Further, a collar-shaped annular protrusion 123 forming the attached collar portion 32a is formed so as to protrude from the end portion of the cylinder portion 121 on the side opposite to the inner end portion 121a. A plurality of through holes 123a forming the locked hole 32b are formed through the annular protrusion 123.

The fastening portion 122 is a portion mainly used for attaching the integrated band component 12 to the tubular component 11, but is also a portion used for ensuring a sealing property between the tubular component 11 and the integrated band component 12. The fastening portion 122 has an annular shape as a whole, and has a seal corresponding portion 122a, a first arm portion 1221, and a second arm portion 1222.

The seal-corresponding portion 122a protrudes from the outer periphery of the tubular portion 121 over the entire circumference of the tubular portion 121 in the circumferential direction, and has a curved plate shape. The seal-corresponding portion 122a faces the outer peripheral surface of the straight pipe portion 11a located around the through hole 11b, and at least the surface of the seal-corresponding portion 122a facing the outer peripheral surface of the straight pipe portion 11a is directly opposed to the outer peripheral surface. The shape corresponds to the outer peripheral surface of the pipe portion 11a, that is, the shape is along the outer peripheral surface of the straight pipe portion 11a. In the present embodiment, the inner surface of the seal corresponding portion 122a is parallel to the outer peripheral surface of the straight pipe portion 11a.

The first arm portion 1221 and the second arm portion 1222 can widen or narrow the distance between the tip portions thereof by utilizing the elastic deformation of the material constituting the integrated band component 12. It is configured. In the present embodiment, the distance between the tip portions of the first arm portion 1221 and the second arm portion 1222 may be widened to at least such that the tubular component 11 (straight pipe portion 11a) can pass between the tip portions. It is possible. If the tubular part 11 (straight pipe portion 11a) can be arranged in the fastening portion 122, the tubular part 11 (straight pipe portion 11a) can always pass through the distance between the tips of both arm portions 1221,1222. It does not have to be expandable to the extent. Therefore, for example, the tubular part 11 (straight pipe portion 11a) may be arranged in the fastening portion 122 by inserting the tubular part 11 into the fastening portion 122 from the end portion thereof.

Further, the first arm portion 1221 includes a first arm base portion 1221a projecting inward from one end in the width direction (circumferential direction) of the seal corresponding portion 122a and a first arm main portion projecting from the tip end portion of the first arm base portion 1221a. It is provided with a portion 1221b. Further, the second arm portion 1222 includes a second arm base portion 1222a projecting inward from the other end in the width direction (circumferential direction) of the seal corresponding portion 122a and a second arm projecting from the tip end portion of the second arm base portion 1222a. It is provided with a main portion 1222b. In the present embodiment, the first arm base portion 1221a and the second arm base portion 1222a correspond to the “outer position defining portion”.

The first arm base portion 1221a and the second arm base portion 1222a have a shape that projects toward the outer peripheral surface of the tubular component 11 in a state where the integrated band component 12 is attached to the tubular component 11. The inner side surfaces (planes facing the inner end 121a side) of the first arm base 1221a and the second arm base 1222a face each other in a parallel state.

Further, when increasing or decreasing the distance between the tip portions of the first arm portion 1221 and the second arm portion 1222, the bent portions provided from the seal corresponding portions 122a to the arm base portions 1221a and 1222a and the arm base portions 1221a and 1222a The arm portions 1221,1222 are elastically deformed with the bent portions provided over the arm main portions 1221b and 1222b as the main base points. The first arm base portion 1221a and the second arm base portion 1222a are made thicker than the seal-corresponding portion 122a and the arm main portions 1221b and 1222b in order to secure sufficient strength against the load generated during elastic deformation.

The first arm main portion 1221b has an arc shape that protrudes toward one side in the circumferential direction of the straight pipe portion 11a and extends along the circumferential direction of the straight pipe portion 11a in a state where the integrated band component 12 is attached to the tubular component 11. Is doing. On the other hand, the second arm main portion 1222b projects toward the other side in the circumferential direction of the straight pipe portion 11a in a state where the integrated band component 12 is attached to the tubular component 11, and extends along the circumferential direction of the straight pipe portion 11a. It has an arc shape.

Further, a locking portion 1221c having a substantially U shape is provided at the tip of the first arm portion 1221, and the tip of the second arm portion 1222 projects outward to provide the locking portion 1221c. A lockable portion 1222c is provided. In the present embodiment, the first arm portion 1221 and the second arm portion 1222 are wound around the outer circumference of the tubular component 11 (straight pipe portion 11a), and the locking portion 1221c is locked to the locked portion 1222c. The integrated band component 12 can be attached to the tubular component 11.

When the integrated band component 12 is in a single state and no special force is applied (that is, when the integrated band component 12 is naturally placed), it is shown in FIG. As described above, the locking portion 1221c is not locked with respect to the locked portion 1222c, and the tip portions of the first arm portion 1221 and the second arm portion 1222 are separated from each other. The integrated band component 12 is formed by mold molding using a mold having a shape corresponding to this state.

The sealing member 13 watertightly seals at least the outer peripheral surface of the tubular component 11 (straight pipe portion 11a) and the inner surface of the sealing corresponding portion 122a, and watertightly seals between the tubular component 11 and the integrated band component 12. This is to prevent water leakage from the tubular component 11 that has passed through the through hole 11b. The seal member 13 is formed of an elastically deformable material (for example, rubber, resin, etc.), and includes an annular portion 131 and a shape maintaining portion 132 as shown in FIGS. 8 to 10. 10 is a cross-sectional view taken along the line KK of FIG.

The annular portion 131 has an annular shape with a circular cross section. The annular portion 131 is arranged on the outer periphery of the tubular portion 121 (inner end portion 121a) and is sandwiched between the inner side surface of the seal corresponding portion 122a and the outer peripheral surface of the tubular part 11 (straight pipe portion 11a). (See Fig. 4). The annular portion 131, that is, the inner peripheral portion of the seal member 13 is in contact with or close to the outer peripheral surface of the tubular portion 121 (inner end portion 121a) (for example, the distance to the outer peripheral surface of the tubular portion 121 is 2 mm or less). ).

The shape maintaining portion 132 protrudes from at least one of the inner circumference and the outer circumference of the annular portion 131, and has a curved shape corresponding to the outer peripheral shape of the tubular component 11 (straight pipe portion 11a). In the present embodiment, the shape maintaining portion 132 is composed of an outer shape maintaining portion 132a that protrudes from the outer periphery of the annular portion 131 and is provided over the entire circumference of the annular portion 131 in the circumferential direction. The shape-maintaining portion 132 brings the annular portion 131 into contact with the annular portion 131 (straight) while the seal member 13 is independent (that is, not sandwiched between the seal corresponding portion 122a and the tubular component 11). It can be maintained in a curved shape corresponding to the outer circumference of the pipe portion 11a).

The "curved shape corresponding to the outer circumference of the tubular part 11 (straight pipe portion 11a)" means that the shape is curved in the same direction as the outer circumference of the tubular part 11 (straight pipe portion 11a). A shape having a radius of curvature different from the radius of curvature of the outer circumference of the tubular part 11 (straight pipe portion 11a) and curved in the same direction as the outer circumference of the tubular part 11 (straight pipe portion 11a) is included. However, in the present embodiment, the shape-maintaining portion 132 keeps the sealing member 13 alone, and the annular portion 131 has a curved shape [tubular component] that fits the outer peripheral shape of the tubular component 11 (straight tube portion 11a). 11 (a shape that curves with a radius of curvature substantially the same as the radius of curvature of the outer circumference of the straight pipe portion 11a)] is maintained.

Further, the shape maintaining portion 132 (outer shape maintaining portion 132a) has a length L1 along its width direction (curving direction) and a length L2 along its height direction (direction orthogonal to the width direction). Are different (see FIG. 8). In the present embodiment, the length L1 is smaller than the length L2. As a result, when the seal member 13 is arranged on the outer periphery of the tubular portion 121 (inner end portion 121a), both end edges in the width direction of the shape maintaining portion 132 (outer shape maintaining portion 132a) are placed on the inner side surfaces of the arm base portions 1221a and 1222a. The height of the shape maintaining portion 132 (outer shape maintaining portion 132a) can be set to be in contact with or close to each other (for example, the distance to the inner side surface of the arm bases 1221a and 1222a is 2 mm or less). It is configured so that the edges at both ends of the direction cannot be brought into contact with or close to the arm bases 1221a and 1222a.

Then, by being configured as described above, the tubular portion 121 (inner end portion 121a) is inserted into the seal member 13, and the inner peripheral portion of the seal member 13 (in the present embodiment, the inner circumference of the annular portion 131). In contact with or close to the tubular portion 121 (inner end portion 121a), the outer peripheral portion of the seal member 13 (in this embodiment, both end edges in the width direction of the shape maintaining portion 132) is in contact with the inner side surfaces of the arm base portions 1221a and 1222a. Alternatively, the arrangement position and the arrangement direction of the annular portion 131 are uniquely determined by setting them in close proximity to each other. That is, the annular portion 131 is arranged by bringing the inner peripheral portion of the seal member 13 into contact with or close to the tubular portion 121 and the outer peripheral portion of the seal member 13 in contact with or close to the arm bases 1221a and 1222a. The outer circumference of the tubular portion 121 (inner end portion 121a) is curved in the same direction as the bending direction of the outer peripheral surface of the tubular part 11 (straight pipe portion 11a) without particularly adjusting the position and the arrangement direction. It can be installed in any position and orientation.

Further, the shape maintaining portion 132 is thinner than the annular portion 131, and at least one of the curved inner side surface and the curved outer surface of the annular portion 131 is in a state of protruding from the surface of the shape maintaining portion 132. In the present embodiment, the curved inner portion of the annular portion 131 protrudes from the inner surface of the shape maintaining portion 132, and the curved outer portion of the annular portion 131 protrudes from the outer surface of the shape maintaining portion 132.

Further, in the seal member 13, as shown in FIG. 11 (FIG. 11 is a bottom view of the drain plug device 1), the annular portion 131 is sandwiched between the seal corresponding portion 122a and the tubular component 11 (straight pipe portion 11a). In this state, the seal member 13 is provided with a confirmation portion 133 that can be visually recognized from the outside for confirming that the seal member 13 is correctly arranged (in the correct position and orientation). In the present embodiment, the confirmation portion 133 is visible from below among both side portions of the curved shape extending in the width direction of the shape maintenance portion 132 provided on the outer edge of the shape maintenance portion 132 (outer shape maintenance portion 132a). It is composed of one side that becomes. Confirmation of the positional relationship between the components of the confirmation portion 133 and the pipe 3 (in this embodiment, the lower end surface of the seal corresponding portion 122a) and the components of the pipe 3 (in this embodiment, the lower end surface of the seal corresponding portion 122a). By checking the degree of inclination of the usage portion 133, it is possible to confirm whether or not the seal member 13 is correctly arranged. In particular, in the present embodiment, when the seal member 13 is correctly arranged, the outer surface (lower end surface of the seal corresponding portion 122a) of the confirmation portion 133 and the component parts of the pipe 3 adjacent thereto are flush with each other. It is possible to more easily confirm whether or not the seal member 13 is correctly arranged.

In the present embodiment, the pipe 3 including the tubular part 11, the integrated band part 12, and the seal member 13 is assembled as follows. First, after widening the distance between the tip portions of the first arm portion 1221 and the second arm portion 1222, the tubular part 11 (straight pipe portion 11a) is arranged in the fastening portion 122 through between the tip portions. , The inner end portion 121a is inserted into the through hole 11b. At this time, both ends in the width direction of the shape maintaining portion 132 (outer shape maintaining portion 132a) with respect to the inner side surfaces of the arm base portions 1221a and 1222b while positioning the annular portion 131 on the outer circumference of the tubular portion 121 (inner end portion 121a). The seal member 13 is arranged in advance so that the edges are in contact with or close to each other.

Next, the first arm portion 1221 and the second arm portion 1222 are wound around the outer circumference of the tubular part 11 (straight pipe portion 11a), and the locking portion 1221c is locked to the locked portion 1222c to lock the fastening portion 122. Is wound around the outer circumference of the tubular part 11 (straight pipe portion 11a). As a result, the integrated band component 12 is attached to the tubular component 11, and the pipe 3 in which the seal member 13 (particularly the annular portion 131) is sandwiched between the seal corresponding portion 122a and the tubular component 11 can be obtained.

As described in detail above, according to the present embodiment, the pipe 3 having the flow path portion 31 and the branch portion 32 has a tubular portion 121 that constitutes the branch portion 32 with respect to the tubular component 11 that constitutes the flow path portion 31. Is configured to be attached. Therefore, a generally used tubular component 11 (for example, a straight tubular pipe) can be used, and an increase in cost related to the manufacture of the pipe 3 can be suppressed.

Further, the tubular portion 121 is attached to the tubular component 11 with its end inserted into the inner circumference of the through hole 11b of the tubular component 11. Therefore, the tubular portion 121, that is, the branch portion 32 can be provided more reliably and more easily depending on the target position in the tubular component 11 with reference to the through hole 11b. Thereby, the ease of manufacturing the pipe 3 can be improved.

Further, the shape maintaining portion 132 (outer shape maintaining portion 132a) provided on the seal member 13 allows the annular portion 131 to be placed on the outer periphery of the straight pipe portion 11a to be contacted even when the seal member 13 is in a single state. It can be maintained in the corresponding curved shape. Therefore, the annular portion 131 can be more reliably maintained in a curved shape, and the annular portion 131 can be more reliably brought into contact (fit) with the outer peripheral surface of the straight pipe portion 11a in a state of being closely aligned. It becomes. As a result, good water stopping property can be ensured more reliably and for a longer period of time.

Further, the shape maintaining portion 132 has a curved shape corresponding to the outer circumference of the straight pipe portion 11a, and by using the shape maintaining portion 132, an error may occur in the mounting direction (arrangement direction) of the seal member 13. Can be prevented more reliably. As a result, the above-mentioned action and effect due to the curved shape of the annular portion 131 can be more reliably exhibited.

In addition, the inner peripheral portion (annular portion 131) and the outer peripheral portion (shape maintaining portion 132) of the seal member 13 are brought into contact with or close to the tubular portion 121 and the arm base portions 1221a and 1222a to bring the annular portion 131. The arrangement position and arrangement direction can be uniquely determined. That is, by installing the seal member 13 so that the inner peripheral portion (annular portion 131) is in contact with or close to the tubular portion 121 and the outer peripheral portion (shape maintaining portion 132) is in contact with or close to the arm bases 1221a and 1222a. The annular portion 131 can be naturally provided in the correct arrangement direction so as to be along the curved outer peripheral surface of the straight pipe portion 11a with respect to the target arrangement position. Therefore, the annular portion 131 can be easily and accurately arranged in the correct arrangement direction with respect to the target arrangement scheduled position. Thereby, good water stopping property can be more reliably ensured.

Further, the shape maintaining portion 132 includes an outer shape maintaining portion 132a that protrudes from the outer periphery of the annular portion 131 and is provided over the entire circumference of the annular portion 131 in the circumferential direction. The outer shape maintaining portion 132a allows the annular portion 131 to be more firmly maintained in a curved shape. Therefore, the annular portion 131 can be brought into contact with the outer peripheral surface of the straight pipe portion 11a in a more stable state, and better water stopping property can be obtained.

Further, since the shape maintaining portion 132 is thinner than the annular portion 131, the sandwiching pressure by the seal corresponding portion 122a and the straight pipe portion 11a can be intensively applied to the annular portion 131. Thereby, the water stopping property (sealing property) can be further improved.

In addition, by looking at the confirmation portion 133, the seal member 13 is correctly (in a state where the annular portion 131 is sandwiched between the seal corresponding portion 122a and the straight pipe portion 11a, that is, the seal member 13 is arranged. It can be confirmed whether or not it is arranged (in the correct position and orientation). Therefore, the annular portion 131 can be arranged more accurately and in the correct position and orientation, and good water stopping property (sealing property) can be more reliably ensured.

The content is not limited to the description of the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modification examples not illustrated below are also possible.

(A) In the above embodiment, the tubular portion 121 and the fastening portion 122 are integrated products formed by one member, but the component corresponding to the tubular portion 121 and the component corresponding to the fastening portion 122 are separately separated. By preparing and assembling both parts, a band part including a tubular part 121 and a fastening part 122 may be formed.

(B) In the above embodiment, the locking portion 1221c is locked to the locked portion 1222c so that the fastening portion 122 is wound around the tubular component 11 (straight tube portion 11a), whereby the tubular component 11 However, the method of attaching the tubular portion 121 to the tubular component 11 is not limited to this. Therefore, for example, instead of the locking portion 1221c and the locked portion 1222c, a half-split cylindrical portion that is combined to form a male screw on the outer periphery is provided at the tip portions of both arm portions 1221, 1222, respectively. , Both arm portions 1221,1222 are wound around the tubular part 11, and after assembling the both half-split cylindrical portions, a nut part having a female screw on the inner circumference is screwed to the outer periphery of the double-split cylindrical portion. May be configured so that the tubular portion 121 can be attached to the tubular component 11. Further, the tubular portion 121 may be attached to the tubular component 11 by using screws, a quick fastener, an adhesive, or the like. Further, when the tubular part 11 is made of metal (for example, iron), for example, a magnet may be used so that the tubular part 121 can be attached to the tubular part 11.

(C) In the above embodiment, the confirmation portion 133 is composed of side portions provided on the outer edge of the seal member 13, but the confirmation portion is visible from the outside and the annular portion 131 seals. It suffices as long as it is possible to confirm whether or not the seal member 13 is correctly arranged in the state of being sandwiched between the corresponding portion 122a and the straight pipe portion 11a. Therefore, it is a protrusion that protrudes from the outer edge of the seal member 13, and is based on, for example, a positional relationship with a predetermined notch (recess, etc.) as a portion to be arranged of the protrusion, which is provided in the seal corresponding portion 122a. , The confirmation portion may be formed by a protrusion that can confirm whether or not the seal member 13 is correctly arranged. Further, whether or not the seal member 13 is correctly arranged based on the mark provided on the outer edge of the seal member 13, for example, the positional relationship with the mark corresponding to the mark provided on the seal corresponding portion 122a. The confirmation portion may be configured by a mark that can confirm whether or not.

(D) In the above embodiment, the outer shape maintaining portion 132a is mentioned as the shape maintaining portion 132, but as shown in FIG. 12, the shape maintaining portion 132 protrudes from the inner circumference of the annular portion 131 and is a straight pipe portion 11a. The inner shape maintaining portion 132b having a curved shape corresponding to the outer circumference of the above may be provided. Further, the shape maintaining portion 132 may include only one of the outer shape maintaining portion 132a and the inner shape maintaining portion 132b, or may include both the outer shape maintaining portion 132a and the inner shape maintaining portion 132b. Good.

Further, in the above embodiment, the shape maintaining portion 132 (outer shape maintaining portion 132a) has a rectangular outer edge in front view, but the outer edge shape of the shape maintaining portion 132 (outer shape maintaining portion 132a) is limited to this. It's not something. Therefore, for example, the outer edge of the shape maintaining portion 132 (outer shape maintaining portion 132a) may be configured to have a circular shape, an elliptical shape, a polygonal shape, an oval shape, or the like when viewed from the front. Of course, the inner edge shape of the inner shape maintaining portion 132b may be changed as appropriate.

(E) In the above embodiment, a metal straight tubular pipe is mentioned as the tubular part 11, but the tubular part may be a pipe body having a straight pipe portion (straight portion) at least in part. Therefore, the tubular part may be a tubular body made of a material other than metal (for example, resin), or may have a bent portion or a curved portion.

(F) In the above embodiment, the integrated band component 12 includes an annular protrusion 123 and a through hole 123a that form a flange portion 32a to be attached and a hole 32b to be locked for attaching the plug lid drive mechanism 4. However, depending on the method of attaching the plug lid drive mechanism 4 to the branch portion 32, the annular protrusion 123 and the through hole 123a may not be provided. In addition to the mounting method described in the above embodiment, as a mounting method of the plug lid drive mechanism 4 to the branch portion 32, for example, screw fixing and the like can be mentioned.

(G) In the above embodiment, the sealing member 13 is brought into contact with or close to the arm bases 1221a, 1222a, etc., so that the annular portion 131 is not particularly adjusted in the arrangement position and the arrangement direction, and the tubular part 11 ( The straight pipe portion 11a) can be installed at a position and orientation that curves in the same direction as the bending direction of the outer peripheral surface, but in order to determine the orientation of the seal member 13, a portion that comes into contact with the seal member 13 is provided. , It is not always necessary to provide it. Even in this case, by utilizing the bending direction of the seal member 13, the seal member 13 (annular portion 131) can be appropriately installed along the outer peripheral surface of the tubular part 11 (straight pipe portion 11a). it can.

(H) In the above embodiment, the support protrusion 42 is configured to protrude from the outer peripheral side of the tip surface of the rotating portion 41. By configuring the support protrusion to protrude from the center of rotation (position overlapping the rotation shaft) on the tip surface of the rotating portion, at least the stopper lid 52 of the support protrusion is directly attached as the rotating portion rotates. Alternatively, the indirectly supported portion may be configured to move up and down. Further, the support protrusion is configured to protrude from the outer peripheral surface of the rotating portion so that the tip side portion (the portion opposite to the rotating portion) of the support protrusion moves up and down as the rotating portion rotates. It may be configured.

(I) In the above embodiment, the drive unit is composed of the rotating unit 41, but the drive unit does not necessarily have to rotate. Therefore, for example, the drive unit may be configured by a reciprocating moving unit that can reciprocate along the axial direction of the branching unit 32. In this case, for example, a support portion having an inclined surface is provided at the tip of the reciprocating moving portion, and the plug lid 52 is directly or indirectly supported by the inclined surface so that the reciprocating moving portion is supported. The stopper lid 52 may be configured to move up and down with the reciprocating movement of the stopper lid 52.

(J) In the above embodiment, the pull-out prevention portion 51c prevents the plug lid unit 5 from being pulled out from the drain port member 2 and the flow path portion 31, but the pull-out prevention portion 51c is not provided. May be. In this case, by pulling up the plug lid 52 upward from the front side (water storage space side) of the wash bowl 100, the plug lid unit 5 can be pulled out from the drain port member 2 and the flow path portion 31. May be good. With such a configuration, it is possible to improve maintainability and cleanability.

(K) In the above embodiment, the support protrusion 42 indirectly supports the plug lid 52, but may directly support the plug lid 52. Further, in the above embodiment, the support portion is formed by the support protrusions 42, but the support portion does not necessarily have to be in the shape of protrusions, as shown in (i) above.

(L) In the above embodiment, the wash bowl 100 is illustrated as the tank body, but the tank body to which the technical idea of the present invention can be applied is not limited to the wash bowl. Therefore, for example, the technical idea of the present invention may be applied to a tank body other than a washbasin such as a bathtub or a kitchen sink.

Further, in the above embodiment, the wash bowl 100 as a tank body is provided with the drainage space 103, but may not be provided with the drainage space 103. In this case, it is not necessary to provide the water passage hole 23 in the drain port member 2.

(M) In the above embodiment, the drain port 102 is closed when the plug lid 52 (packing portion 52b) comes into contact with the drain port member 2, but the plug lid 52 (packing portion 52b) is closed. ) May come into contact with the bottom wall portion 101 so that the drain port 102 is closed.

1 ... Drain plug device, 3 ... Piping, 11 ... Tubular parts, 11a ... Straight pipe part, 11b ... Through hole, 13 ... Seal member, 31 ... Flow path part, 32 ... Branch part, 41 ... Rotating part (Drive part) ), 42 ... Support protrusion (support part), 52 ... Plug lid, 100 ... Wash bowl (tank body), 102 ... Drainage port, 121 ... Cylinder part, 122a ... Seal corresponding part, 131 ... Circular part, 132 ... Shape maintenance Part, 132a ... Outer shape maintaining part 133 ... Confirmation part, 1221a ... First arm base part (outer position base part), 1222a ... Second arm base part (outer position defining part).

Claims (5)

A lid that can move up and down to open and close the drain of the tank,
A tubular branch where drainage that has passed through the drainage port flows, and a tubular branch that protrudes from the outer circumference of the flow path so that its own internal space communicates with the internal space of the flow path. Piping that has a part and
A movable drive unit inserted through the branch portion and
It is provided with a support portion that is arranged in the flow path portion and directly or indirectly supports the plug lid.
A drain plug device configured so that the stopper lid moves up and down when the support portion moves up and down with the movement of the drive unit.
The piping
A tubular component constituting the flow path portion, which has a straight tubular portion at least in a part thereof and is provided with a through hole penetrating inside and outside the straight pipe portion.
It is attached to the tubular part with its end inserted through the through hole, and the tubular portion constituting the branch portion and the tubular portion.
A seal-corresponding portion that protrudes from the outer circumference of the cylinder portion over the entire circumference in the circumferential direction of the cylinder portion and faces the outer peripheral surface of the straight pipe portion located around the through hole.
It has an annular portion arranged on the outer periphery of the tubular portion, and also includes a seal member made of an elastically deformable material in which the annular portion is sandwiched between the seal corresponding portion and the straight pipe portion. ,
The sealing member includes a shape-maintaining portion that protrudes from at least one of the inner circumference and the outer circumference of the annular portion and has a curved shape corresponding to the outer circumference of the straight pipe portion.
The shape maintaining portion is characterized in that the sealing member can be maintained in a curved shape corresponding to the outer periphery of the straight pipe portion in contact with the annular portion while the sealing member is alone. Drain plug device. The pipe has an outer positioning portion that is in contact with or close to the outer periphery of the seal member.
The inner peripheral portion of the seal member is in contact with or close to the tubular portion, and the outer peripheral portion of the seal member is in contact with or close to the outer position defining portion. The drain plug device according to claim 1, wherein the arrangement direction is uniquely determined. The drain plug device according to claim 1 or 2, wherein the shape maintaining portion has an outer shape maintaining portion that protrudes from the outer periphery of the annular portion and is provided over the entire circumference of the annular portion in the circumferential direction. .. The drain plug device according to any one of claims 1 to 3, wherein the shape maintaining portion is thinner than the annular portion. The seal member has a visible confirmation portion for confirming that the seal member is correctly arranged in a state where the annular portion is sandwiched between the seal corresponding portion and the straight pipe portion. The drain plug device according to any one of claims 1 to 4, wherein the drain plug device is characterized.

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