JP2018172867A - Water discharging port device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharging port device that can suppress various costs and can improve ease of component management.SOLUTION: The water discharging port device comprises a water discharging port member inserted through a water discharging port of a bottom wall portion, U packing 7, and a water discharging pipe attached to the water discharging port member. The water discharging pipe and the water discharging port member are configured so that their relative positions are in a fixed position in a mounted state. The U packing 7 has an upper tongue piece portion 71, a lower tongue piece portion 72, a connecting portion 73 connecting the tongue piece portions 71 and 72, and a portion fitted into an annular space 74 composed of the tongue piece portions 71 and 72 and the connecting portion 73. The portion forms the water discharging port at the bottom wall portion. The lower tongue piece portion 72 has a bulging portion 75 provided which forms a ridge extending over an entire circumference thereof, bulges toward the bottom wall portion side to contact the bottom wall portion, and can be crushed and deformed by having a hollow portion 76 inside itself.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a drain port device provided corresponding to a bottom wall portion of a bathtub or the like.

  The drain port device is provided in a drain port formed through a bottom wall portion of a tank body (for example, a bathtub, a wash bowl, etc.) or a unit bath, and constitutes a drain flow path. . The drain port device includes a drain port member and a drain pipe each having a cylindrical shape. The drain port member has an annular flange projecting radially outward at the upper end, and is inserted into the drain port. The drain pipe is attached in series to the drain port member in a state where the bottom wall portion is sandwiched between the drain tube and the drain pipe, and is connected to the drain port member.

  Moreover, in order to prevent water leakage, an annular packing made of an elastically deformable material (for example, rubber or resin) may be disposed between the flange portion and the bottom wall portion or between the drain pipe and the bottom wall portion. The packing includes an annular upper tongue piece portion and a lower tongue piece portion, respectively, and a connecting portion that connects the inner edges of these tongue pieces, and opens to the outer periphery composed of each tongue piece portion and the connecting portion. A U-packing configured so that a bottom wall portion is inserted into an annular space has been proposed (see, for example, Patent Document 1). When the U packing is used, the upper tongue piece portion is disposed between the collar portion and the bottom wall portion, while the lower tongue piece portion is disposed between the drain pipe and the bottom wall portion. With the attachment of the member and the drain pipe, the state is sandwiched between the upper and lower adjacent parts.

  In addition, as described above, the drain pipe is attached to the drain port member. However, as a method of attaching the drain pipe to the drain port member, a male screw portion provided on the outer periphery of the drain port member is provided on the inner periphery of the drain pipe. Generally, a method of screwing into the formed female screw portion is used. On the other hand, in recent years, a plurality of locking protrusions provided on the outer periphery of the drain port member and a taper portion provided on the inner periphery of the drain pipe in order to wipe the troublesome tightening force management at the time of screwing. An attachment method using a plurality of guide portions having a shape has been proposed (see, for example, Patent Document 2). In this attachment technique, the drainage port member is inserted into the drainage pipe and the latching convex portion is disposed between the guide portions, and the drainage port member is rotated by a predetermined amount so that the latching convex portion is a tapered portion. Is guided downward along. And finally, attachment of a drain port member and a drain pipe is completed because it will always be in the state where rotation of the drain port member with respect to the drain pipe was controlled.

JP 2014-125798 A JP2013-92012A

  By the way, in the mounting method using the above-described locking convex portion and guide portion, unlike a general screwing mounting method, the drain port member along the axial direction (vertical direction) of the drain port member and The relative position of the drain pipe is determined at a fixed position. That is, the distance between a collar part and a drain pipe from which a bottom wall part and packing are inserted after completion of attachment becomes constant. Here, when U packing is used as the packing, if the thickness of the bottom wall portion is constant, it can be handled with a small number (for example, one type) of U packing, but the thickness of the bottom wall portion. May vary depending on the type of tank body, design reasons, manufacturing tolerances, and the like. For this reason, various types of U-packings having different thicknesses of both tongue pieces and distances between both tongue pieces (the height of the annular space) must be prepared in order to correspond to bottom wall portions having various thicknesses.

  However, if various types of U-packings are prepared, the number of stocks related to the U-packings increases, and there is a risk that component management becomes complicated. Furthermore, when preparing various types of U-packings, it is necessary to spend a great deal of money on producing a mold for manufacturing U-packings, or the unit price of U-packings may increase.

  In addition, when the drain port device is provided in the bathtub, if the manufacturing tolerance of the thickness of the portion (inner collar portion) that forms the drain port in the bottom wall portion of the bathtub is large, when the drain port device is installed, After measuring the thickness of the part, it becomes necessary to perform a troublesome operation such as selecting a U-packing suitable for the thickness.

  Providing such various U-packings is not preferable in terms of various costs, component management, and workability.

  The present invention has been made in view of the above circumstances, and its purpose is to have a versatile U-packing capable of dealing with various bottom wall portions having various thicknesses, and to suppress various costs. An object of the present invention is to provide a drain port device capable of improving the ease of parts management.

  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 a drainage port penetratingly formed in a predetermined bottom wall portion and having a collar portion protruding radially outward at an upper end portion;
Each has an annular upper tongue piece portion and a lower tongue piece portion, and a connecting portion that connects the inner end edges of each tongue piece portion, and opens to the outer periphery composed of each tongue piece portion and the connecting portion. A U-packing into which a portion for forming the drain port in the bottom wall portion is inserted into the annular space;
A cylindrical shape attached to the drain port member in a state where the drain port member is inserted through its inner periphery, and sandwiching the tongue piece portion and the bottom wall portion with the flange portion. With a drain pipe,
In the state where the drain pipe and the drain port member are attached, the drain port device is configured such that the relative position of the drain pipe and the drain port member along the axial direction of the drain port member is a constant position. And
The lower tongue piece portion has a ridge extending over the entire circumference thereof, bulges toward the bottom wall portion side, contacts the bottom wall portion, and has a hollow portion within itself. A drainage device having a bulging portion configured to be crushed and deformable by being provided.

  According to the means 1, the lower tongue piece of the U-packing is provided with the bulging portion that bulges toward the bottom wall portion and contacts the bottom wall portion. Since the bulging portion can be crushed and deformed by having a hollow portion inside, it is possible to ensure a large amount of crushed deformation. Therefore, by deforming the bulging portion, a common U-packing can be used for the bottom wall portions having different thicknesses, and the bottom wall portions having various thicknesses can be prepared without preparing various U-packings. It can correspond to. As a result, it is possible to reduce the number of inventory points, costs related to the mold, and the like, and it is possible to reduce the unit price of the U-packing by sharing parts. As a result, various costs can be effectively suppressed.

  Further, since it is not necessary to prepare various U-packings, it is possible to improve the ease of component management.

  Furthermore, at the time of attaching the drain port device, it is not necessary to perform a troublesome operation such as selecting an appropriate one from various U-packings according to the thickness of the bottom wall portion, thereby improving workability. Can do. In particular, when the manufacturing tolerance of the thickness of the portion (inner collar portion) that forms the drainage port in the bottom wall portion of the bathtub is large, this action works effectively.

  In addition, since the bulging portion has a shape extending over the entire circumference of the lower tongue piece portion, it is possible to ensure good sealing performance.

  Mean 2. In the cross section including the central axis of the U-packing, at least a portion of the bulging portion located on the distal end side has a shape that gradually tapers toward the forefront of the bulging portion. The drainage device according to 1.

  According to the above means 2, at least the tip side portion of the bulging portion is formed to be gradually tapered toward the forefront. Therefore, even when the bottom wall portion is relatively thin and the amount of collapse deformation of the bulging portion is small, the tip portion of the bulging portion can be brought into contact with the bottom wall portion with a stronger pressure. Thereby, the sealing property between a bottom wall part and a bulging part can be made more favorable reliably, and water leakage prevention can be aimed at more effectively.

Means 3. The U-packing has a protruding hanging portion that protrudes downward from the lower portion of the connecting portion,
The protruding hanging portion prevents the drain port member from being inserted more than a certain amount into the drain pipe when the U packing is turned upside down, and makes it impossible or difficult to mount the drain pipe to the drain port member. The drain port device according to the means 1 or 2, wherein the drain port device is configured as described above.

  According to the means 3, the U-packing has the protruding hanging portion that protrudes downward from the lower portion of the connecting portion. Therefore, by using the projecting hanging portion as a mark, the U-packing can be more reliably disposed in the normal direction, and it is possible to prevent the occurrence of an installation error.

  Moreover, even if the U packing is not disposed in the normal orientation and is disposed in an upside down state, the protruding hanging portion prevents the drain port member from being inserted into the drain pipe more than a certain amount, and the drain port member It is possible to make the installation of the drain pipe impossible or difficult. Therefore, it is possible to effectively prevent the occurrence of attachment mistakes.

  Means 4. The drain port device according to claim 3, wherein the projecting hanging portion is sandwiched between an outer peripheral surface of the drain port member and an inner peripheral surface of the drain pipe.

  According to the means 4, in addition to the upper tongue piece portion and the lower tongue piece portion, the projecting hanging portion also functions as a seal portion for preventing water leakage. Thereby, water leakage prevention can be achieved very effectively.

It is a partially broken front view of a drain outlet device when a drain outlet is made into a closed state. It is a partially broken front view of a drain outlet device when a drain outlet is made into an open state. It is a section perspective view of U packing. It is an expanded sectional end view of U packing.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, the drain port device 1 is attached to a bathtub 100.

  First, the bathtub 100 will be described prior to the description of the drain port device 1. The bathtub 100 includes a bottom wall portion 101 that constitutes a bottom surface thereof. The bottom wall portion 101 includes a drooping portion 102 that hangs downward, and an inner portion that projects inwardly from the lower portion of the drooping portion 102. A collar portion 103 is provided. The hanging part 102 is configured so that the inner diameter gradually decreases slightly toward the lower side. In addition, a drain port 104 is formed inside the inner flange 103.

  Further, a peripheral wall portion (not shown) is erected on the outer periphery of the bottom wall portion 101, and a flange portion (not shown) protruding outward is provided at the upper end portion of the peripheral wall portion. An operation device (not shown) having an operation member (not shown) that can be displaced with respect to the bathtub 100 (for example, an operation button) is attached to the flange portion. In addition, you may provide the said operating device in the structure around the bathtub 100. FIG.

  Next, the drain port device 1 will be described. The drain port device 1 includes a drain port member 2, a drain pipe 3, an attachment member 4, a support shaft mechanism 5, a plug lid 6, and a U packing 7.

  The drain port member 2 is mainly used for connecting the drain pipe 3 to the bathtub 100. The drain port member 2 is formed in a cylindrical shape, and is inserted into the drain port 104 so that its own central axis and the central axis of the drain port 104 substantially coincide with each other. The drain port member 2 includes a flange portion 21 that protrudes outward in the radial direction at the upper end portion thereof, and an insertion portion 22 that is positioned below the flange portion 21 and has a substantially constant inner diameter.

  The flange portion 21 is for sandwiching the bottom wall portion 101 (inner flange portion 103) and the U packing 7 with the drain pipe 3, and is disposed in the hanging portion 102. An annular groove extending in the circumferential direction is formed on the outer periphery of the flange portion 21, and an annular seal member 23 made of an elastically deformable material (for example, rubber or resin) is fitted into the groove. It is.

  The seal member 23 has a shape protruding outward from the flange portion 21, and the outer diameter of the seal member 23 is slightly larger than the inner diameter of the drooping portion 102 when fitted in the groove. In the present embodiment, when attaching the drain pipe 3 to the drain port member 2 to be described later, since the flange portion 21 is inserted from above into the hanging portion 102, the outer peripheral side portion of the seal member 23 contacts the hanging portion 102. However, it is bent and deformed upward.

  The inserted portion 22 is a portion that is inserted into the inner periphery of the drain pipe 3, and a hook-shaped outward protruding portion 22 </ b> A that protrudes radially outward is provided on the outer periphery of the lower portion thereof. The outward projecting portion 22A supports an inner peripheral surface of a projecting hanging portion 77 (described later) of the U packing 7 and restricts the movement of the projecting hanging portion 77 toward the inner periphery.

  Furthermore, a plurality of protruding inward protruding portions 22 </ b> C and recessed notched concave portions 22 </ b> D are formed along the circumferential direction of the drain port member 2 at the lower portion of the inner periphery of the insertion portion 22. The inwardly projecting portion 22 </ b> C and the notch recessed portion 22 </ b> D are used for attaching the attachment member 4 to the inner periphery of the drain port member 2.

  The drainage pipe 3 is a part constituting a flow path of drainage flowing from the bathtub 100 or the like. The drainage pipe 3 includes a cylindrical main body pipe 31 extending along the vertical direction and a connection pipe 32 extending in a state branched from the main body pipe 31.

  The main body pipe 31 has a hollow housing portion 31 </ b> A having an annular shape in plan view on the inner periphery of one end portion (upper end portion) thereof. The one end surface 31B of the main body pipe 31 has a shape protruding outward in the radial direction, and the width along the radial direction is relatively large.

  The connecting pipe 32 is a part to which a connecting pipe 83 for flowing waste water that has flowed into the operating device is connected. The connection pipe 32 is formed so as to project obliquely upward from the outer periphery of the main body pipe 31, and its own internal space communicates with the internal space of the main body pipe 31. Then, the waste water flowing into the operation device is guided into the main body pipe 31 through the connecting pipe and the connecting pipe 32. The waste water that has flowed into the main body pipe 31 flows downstream (for example, the side of the drain trap, etc.) through the pipe 84 connected to the lower portion of the main body pipe 31.

  Further, the drain pipe 3 is attached to the drain port member 2 in a state where the lower portion of the drain port member 2 is inserted through the inner periphery of the drain pipe 3. The attachment method of the drain pipe 3 with respect to the drain port member 2 in this embodiment is the same as the attachment method described in JP2013-92012A.

  Explaining the attachment method, a plurality of (for example, four) guide portions (not shown) are formed on the upper inner peripheral surface of the main body pipe 31 so as to protrude at a predetermined interval. The interval between the guide portions is set sufficiently wide to allow insertion (passage) of a locking projection described later.

  The guide portion has a tapered portion (not shown) whose upper end edge extends in the horizontal direction along the inner peripheral surface of the main body tube 31 and whose lower end edge extends obliquely downward along the inner peripheral surface of the main body tube 31. It has become. That is, each guide portion is formed such that its vertical height continuously increases along the circumferential direction of the main body pipe 31.

  Moreover, the site | part connected to the lowest part of the said taper part among the lower end edges of each guide part is made into the flat surface shape extended in a horizontal direction. And the stopper part which is not shown in figure which protrudes below the said flat surface part is provided in the position which pinches | interposes the said flat surface part between the said taper parts.

  On the other hand, the drain port member 2 is provided with a plurality of (for example, four) locking projections (not shown) protruding outward on the outer peripheral surface of the insertion portion 22 at a predetermined interval in the circumferential direction.

  In attaching the drainage pipe 3 to the drainage port member 2, first, the U-packing 7 is disposed at a predetermined position, and the drainage pipe 3 is attached to the back side of the bottom wall portion 101 (the side opposite to the water storage space of the bathtub 100). After the arrangement, the drain port member 2 is inserted through the drain port 104 into the inner periphery of the drain pipe 3. At this time, it is set as the state which the latching convex part provided in the outer periphery of the drain port member 2 was located between each said guide part provided in the inner periphery of the drainage pipe 3 (especially between each said taper part).

  Next, from this state, the drain port member 2 is rotated by a predetermined amount (for example, approximately 45 °), for example, clockwise in a plan view. Thereby, each latching convex part is guided downward while moving along the taper part, and the drain port member 2 enters into the deeper side of the drain pipe 3. At this time, the U-packing 7 is compressed and deformed, and the seal member 23 comes into contact with the hanging portion 102 and bends and deforms upward.

  And each latching convex part is located in a flat surface-like part in the guide part, contacts the stopper part, and is in a state in which further rotation of the drain port member 2 is restricted, The attachment of the drain pipe 3 to the drain port member 2 is completed.

  In addition, after the installation is completed, a force in a direction away from the mating side is applied to the drain port member 2 and the drain pipe 3 by the repulsive force generated by the U packing 7 and the holding force generated by the seal member 23, respectively. Become. Thereby, the said latching convex part of the drain port member 2 will be in the state press-contacted with respect to the flat surface-shaped site | part of the said guide part. Therefore, the drain pipe 3 is firmly attached to the drain port member 2.

  Moreover, in the attachment method as described above, in a state where the drain pipe 3 and the drain port member 2 are mounted, the relative positions of the drain pipe 3 and the drain port member 2 along the axial direction of the drain port member 2 are constant positions. . Therefore, for example, when the drain port member 2 and the drain pipe 3 are fixed with screws, the relative positions of the drain pipe 3 and the drain port member 2 along the axial direction are changed depending on the amount of screwing. The distance between the flange 21 and the one end surface 31B, that is, the size of the gap in which the inner flange 103 and the U packing 7 are arranged can be adjusted. The distance between the end faces 31B cannot be adjusted.

  The attachment member 4 is for holding the support shaft mechanism 5 in the drain port member 2 and the drain pipe 3, that is, in the drain flow path. The attachment member 4 includes an outer cylinder part 41, a holding cylinder part 42, and an arm part 43.

  The outer cylinder portion 41 has a cylindrical shape and is disposed along the inner peripheral surface of the drain port member 2. Moreover, the outer cylinder part 41 is provided with the convex part 41A which protrudes toward the outer periphery in the outer periphery. A plurality of the convex portions 41 </ b> A are provided at equal intervals along the circumferential direction of the outer cylinder portion 41. A slit (notch) is formed in a portion adjacent to each convex portion 41 </ b> A in the outer cylindrical portion 41, and as a result, each convex portion 41 </ b> A can be elastically deformed along the radial direction of the outer cylindrical portion 41. Yes.

  The holding cylinder part 42 is disposed at the center of the attachment member 4 inside the outer cylinder part 41 and has a cylindrical shape concentric with the outer cylinder part 41. The holding cylinder portion 42 is a portion that holds the support shaft mechanism 5 on its inner circumference.

  The arm part 43 connects the inner peripheral surface of the outer cylinder part 41 and the outer peripheral surface of the holding cylinder part 42, and connects the holding cylinder part 42 and the support shaft mechanism 5 held thereby to the drain port member 2 and the drain pipe 3. This is a part to be arranged at the center of the drainage flow path. A plurality of arm parts 43 are provided at intervals along the circumferential direction of the holding cylinder part 42, so that the waste water that flows into the drain port member 2 flows downstream through the gaps between the arm parts 43. It has become.

  The attachment member 4 is attached to the drain port member 2 in a state of being inserted through the inner periphery of the drain port member 2. More specifically, the convex portion 41A is arranged in the notch concave portion 22D, and the portion forming the slit in the outer cylindrical portion 41 is placed on the inwardly protruding portion 22C, so that the drain port member 2 is An attachment member 4 is attached.

  The support shaft mechanism 5 is a mechanism that moves the stopper lid 6 up and down. The support shaft mechanism 5 includes a case portion 51 and a support shaft 52.

  The case portion 51 has a cylindrical shape, and accommodates the support shaft 52 and a predetermined lock mechanism (not shown) inside. The case part 51 is arranged in a state in which it cannot move relative to the holding cylinder part 42 in the vertical direction. The lock mechanism may be provided in the operating device.

  The support shaft 52 is a part that supports the stopper lid 6, and a tip portion of the supporting shaft 52 is fitted into a cylindrical part formed on the back surface of the stopper lid 6. The lower end portion of the support shaft 52 can be pushed up by a transmission member 81 (for example, a metal wire) that reciprocates with the displacement of the operation member. The transmission member 81 is configured to reciprocate within a cylindrical tube member 82 provided on the outer periphery thereof, and reciprocates within the tube member 82 by the displacement of the operation member.

  When the transmission member 81 moves forward (moves from the operation device side to the drain port device 1 side) due to the displacement of the operation member and the support shaft 52 is raised, the support shaft 52 is slightly slightly higher than its rising end by the lock mechanism. Locked in the lower position. In this state, when the operation member is displaced again and the transmission member 81 moves forward, the lock of the support shaft 52 by the lock mechanism is released, and a force such as a return spring (not shown) (for example, provided in the case portion 51) is provided. As a result, the support shaft 52 is lowered. As described above, in this embodiment, with the displacement of the operation member, the support shaft 52 is substantially locked at the position of the ascending end and the support shaft 52 is lowered when the lock is released. .

  The plug lid 6 moves up and down together with the support shaft 52 to open and close the drain port 104. The plug lid 6 includes a disk-shaped plug lid main body portion 61 made of resin or the like, and a packing portion 62 attached to the plug lid main body portion 61. The packing part 62 is formed in an annular shape by an elastically deformable material (for example, rubber, resin, etc.), and is fitted into a recess that is provided near the outer periphery of the back surface of the plug lid main body part 61 and opens to the outside. It is supposed to be in a state.

  In the present embodiment, the stopper lid 6 is moved upward with the upward movement of the support shaft 52 and the packing portion 62 is separated from the drain port member 2, whereby the drain port 104 (drain flow path) is opened. (See FIG. 2). On the other hand, the stopper lid 6 moves downward along with the downward movement of the support shaft 52, and the entire outer peripheral portion of the packing portion 62 comes into contact with the drain port member 2 (in this embodiment, the tapered portion on the inner periphery). The port 104 (drainage channel) is closed. In this embodiment, every time the operation member is operated, the stopper lid 6 is alternately raised and lowered (opening / closing the drain port 104).

  Next, the configuration of the U packing 7 will be described. The U packing 7 is sandwiched with the bottom wall portion 101 (inner flange portion 103) by the flange portion 21 and the one end surface 31B of the drainage pipe 3, and the drain port member 2 and the drainage connected in series. This is intended to prevent leakage of water from between the pipe 3 and the bathtub 100. The U packing 7 is formed of an elastically deformable material (for example, rubber or resin), and includes an upper tongue piece 71, a lower tongue piece 72, and a connecting portion 73 as shown in FIG. Yes.

  The upper tongue piece 71 has a flat plate shape in a plan view and is disposed on the surface side of the bottom wall 101 (the water storage space side of the bathtub 100). The upper tongue piece portion 71 is sandwiched between the flange portion 21 and the bottom wall portion 101 (inner flange portion 103).

  The lower tongue piece 72 has an annular shape in plan view that is concentric with the upper tongue piece 71, and is sandwiched between the bottom wall portion 101 (inner collar portion 103) and one end surface 31 </ b> B on the back side of the bottom wall portion 101. It is assumed that Further, the outer diameter of the lower tongue piece portion 72 is larger than the outer diameter of the upper tongue piece portion 71, and as described above, the width of the one end face 31B is sufficiently large. Thus, the contact area between the one end surface 31B and the U packing 7 is sufficiently secured.

  Further, the distance from the upper surface of the upper tongue piece portion 71 to the lower surface of the lower tongue piece portion 72 in the U packing 7 (the thickness of the portion of the U packing 7 sandwiched between the flange 21 and the drain pipe 3) is the drain pipe. 3 and the drain port member 2 in a state where the drainage port member 2 is attached (for example, slightly larger than the distance) corresponding to the distance between the flange 21 and the one end surface 31B.

  The connecting portion 73 is a portion that connects the inner edges of the tongue piece portions 71 and 72, and has a cylindrical shape concentric with the tongue piece portions 71 and 72.

  The U-packing 7 is formed with an annular space 74 opened to the outer periphery by the tongue pieces 71 and 72 and the connecting portion 73. And the site | part (in this embodiment, the inner collar part 103) which forms the drain outlet 104 in the bottom wall part 101 with respect to the cyclic | annular space 74 is in the state inserted (refer FIG. 1 etc.).

  By the way, in this embodiment, in the state which attached the drain pipe 3 and the drain port member 2 as mentioned above, the relative position of the drain pipe 3 and the drain port member 2 along the axial direction of the drain port member 2 is a fixed position. It becomes. Accordingly, the distance between the flange 21 and the one end surface 31B is always substantially constant. Therefore, in a state where the drain pipe 3 and the drain port member 2 are attached, the U packing and the bottom wall portion 101 (inner flange portion 103) are sandwiched by the flange portion 21 and the one end surface 31B. Variation of the bottom wall portion 101 (inner collar portion 103) so that the total thickness of the portion 101 (inner collar portion 103) and each tongue piece portion corresponds to the distance between the collar portion 21 and the one end surface 31B. Accordingly, it has been necessary to use U-packings in which the thicknesses of the tongue pieces are different. However, with this method, it is necessary to prepare various U-packings to cope with the thickness variation of the bottom wall portion 101 (inner collar portion 103), which may cause various disadvantages.

  Therefore, in the present embodiment, a bulging portion 75 is provided on the lower tongue piece 72 in order to eliminate the above disadvantages. The bulging portion 75 has a shape that bulges upward (from the bottom wall portion 101 side) from the upper surface of the flat plate portion that contacts the one end surface 31B of the lower tongue piece portion 72. Further, the bulging portion 75 has a ridge extending over the entire circumference of the lower tongue piece 72, and is concentric with the lower tongue piece 72. Further, a hollow portion 76 that opens downward is provided inside the bulging portion 75, and the bulging portion 75 can be relatively easily crushed and deformed by the presence of the hollow portion 76.

  By providing such a bulging portion 75, when the bottom wall portion 101 (inner collar portion 103) is disposed with respect to the annular space 74, the bulging portion 75 is in the bottom wall portion 101 (inner collar portion 103). It will be in the state which contacted and was deformed. Here, the amount of deformation of the bulging portion 75 varies according to the thickness of the bottom wall portion 101 (inner collar portion 103), and as a result, due to the thickness variation in the bottom wall portion 101 (inner collar portion 103). The influence is absorbed by the bulging portion 75. Therefore, as described above, the distance from the upper surface of the upper tongue piece portion 71 to the lower surface of the lower tongue piece portion 72 in the U packing 7 (the thickness of the portion of the U packing 7 sandwiched between the flange portion 21 and the drain pipe 3). , Corresponding to the distance between the flange 21 and the one end face 31B, even if the thickness of the bottom wall 101 (inner flange 103) varies, the flange 21 and the one end face 31B. Thus, the U packing 7 and the bottom wall portion 101 (inner collar portion 103) can be sandwiched.

  As shown in FIG. 4, the bulging portion 75 includes a pair of vertical portions 75A and 75B and a distal end bending portion 75C.

  Both vertical portions 75A and 75B are erected in a substantially vertical state with respect to a flat plate-like portion contacting the one end surface 31B of the lower tongue piece 72. When the bulging portion 75 is crushed and deformed by the two vertical portions 75A and 75B, the shape of the bulging portion 75 is prevented from being excessively collapsed. It can come into contact with (inner collar 103). Thereby, it is possible to improve the sealing performance.

  The distal end bending portion 75C connects the distal end portions of both vertical portions 75A and 75B, and has a curved shape with a rounded convex shape toward the upper side. In the present embodiment, by providing the distal end bending portion 75C, in the cross section including the central axis CL1 (see FIG. 3) of the U packing 7, at least a portion located on the distal end side of the bulging portion 75 is the bulging portion 75. The shape gradually tapers toward the cutting edge.

  Further, the U-packing 7 includes a protruding hanging portion 77 that extends downward from the lower portion of the connecting portion 73. The protruding hanging portion 77 has a cylindrical shape continuously extending from the lower portion of the connecting portion 73 and is accommodated in the accommodating portion 31A of the drain pipe 3 (see FIG. 1 and the like).

  Further, the projecting hanging portion 77 is provided with a support convex portion 77A made of an annular small protrusion on the inner periphery thereof, and on the outer periphery thereof with a pressure contact convex portion 77B made of an annular relatively large protrusion. Yes. The protruding drooping portion 77 is in a state in which the supporting convex portion 77A is in contact with the outward protruding portion 22A of the drain port member 2 and the press contact convex portion 77B is in press contact with the inner peripheral surface of the drain pipe 3. That is, the projecting hanging portion 77 is sandwiched between the outer peripheral surface of the drain port member 2 and the inner peripheral surface of the drain pipe 3. In addition, since the press-contact convex portion 77B has a convex curved shape toward the outside, the press-contact convex portion 77B can be brought into contact with the inner peripheral surface of the drainage pipe 3 with a stronger pressure, and thus better. It is possible to obtain a good sealing property.

  In addition, the protruding drooping portion 77 is accommodated as the accommodating portion 31A if the vertical direction of the U packing 7 is a normal orientation. However, when the drain pipe 3 is attached to the drain port member 2, the U packing 7 is temporarily When it is in the inverted state, it functions to come into contact with the flange 21 and prevent the drain port member 2 from being inserted into the drain pipe 3 beyond a certain level (including a state in which the drain port member 2 is not inserted). Thereby, when the U packing 7 is in an upside down state, even if the drain port member 2 is inserted into the drain pipe 3, the gap between the guide portions provided on the inner periphery of the drain pipe 3 (particularly the taper). It becomes impossible or difficult to position the locking projections provided on the outer periphery of the drain port member 2 between the parts). Therefore, in a state where the U packing 7 is turned upside down, it becomes impossible or difficult to attach the drain pipe 3 to the drain port member 2. Thus, the projecting hanging portion 77 functions effectively not only in terms of realizing good sealing performance but also in terms of preventing misassembly.

  As described in detail above, according to the present embodiment, the common U-packing 7 is used for the bottom wall portion 101 (inner flange portion 103) having various thicknesses by crushing and deforming the bulging portion 75. It is possible to cope with the bottom wall portion 101 (inner collar portion 103) having various thicknesses without preparing various U-packings. As a result, it is possible to reduce the number of inventory points and costs related to the mold, and it is possible to reduce the unit price of the U-packing 7 by sharing parts. As a result, various costs can be effectively suppressed.

  Further, since it is not necessary to prepare various U-packings, it is possible to improve the ease of component management.

  Furthermore, it is not necessary to perform troublesome work such as selecting an appropriate one from various U-packings according to the thickness of the bottom wall portion 101 (inner collar portion 103) when the drain port device 1 is attached. The workability can be improved. In particular, when the manufacturing tolerance of the thickness in the inner collar portion 103 is large, this action works effectively.

  In addition, since the bulging portion 75 has a shape extending over the entire circumference of the lower tongue piece portion 72, it is possible to ensure good sealing performance.

  In addition, at least the tip side portion of the bulging portion 75 has a shape that gradually tapers toward the leading edge. Accordingly, even when the bottom wall portion 101 (inner collar portion 103) is relatively thin and the amount of deformation of the bulging portion 75 is small, the bottom wall portion 101 ( It can be brought into contact with the inner flange 103). Thereby, the sealing property between the bottom wall part 101 and the bulging part 75 can be made more reliable, and water leakage can be prevented more effectively.

  Further, the U packing 7 has a projecting hanging portion 77. Therefore, by using the projecting hanging portion 77 as a mark, the U-packing 7 can be more reliably disposed in the normal direction, and it is possible to prevent an installation error from occurring.

  Further, even if the U-packing 7 is not disposed in the normal orientation and is disposed in the upside down state, the protruding hanging portion 77 prevents the drain port member 2 from being inserted beyond the drain pipe 3 more than a certain amount, Attachment of the drain pipe 3 to the drain port member 2 can be made impossible or difficult. Therefore, it is possible to effectively prevent the occurrence of attachment mistakes.

  In addition, in the present embodiment, since the protruding hanging portion 77 is sandwiched between the outer peripheral surface of the drain port member 2 and the inner peripheral surface of the drain pipe 3, the upper tongue piece portion 71 and the lower tongue piece portion 72. In addition, the projecting hanging portion 77 also functions as a seal portion for preventing water leakage. Thereby, water leakage prevention can be achieved very effectively.

  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 embodiment, the bulging portion 75 has a shape including a pair of vertical portions 75A and 75B and a distal end bending portion 75C. However, the shape of the bulging portion is not limited to this. Absent. Therefore, for example, the bulging portion may be configured not to include the vertical portions 75A and 75B but to have a rounded curved shape as a whole. In addition, in the cross section including the central axis CL1 of the U-packing 7, for example, the bulging portion is configured so that the tip portion has a sharp shape by making the width gradually narrower toward the forefront. May be. Of course, the bulging portion may have a rectangular cross section or a trapezoidal cross section.

  (B) In the above embodiment, only one bulging portion 75 is provided, but a plurality of bulging portions may be provided concentrically.

  (C) In the said embodiment, in the state which attached the drain pipe 3 and the drain port member 2, the attachment method in which the relative position of the drain pipe 3 and the drain port member 2 along the axial direction of the drain port member 2 becomes a fixed position. As an example, an attachment method using a guide portion and a locking projection is given. However, as long as the relative positions of the drain pipe 3 and the drain port member 2 are determined to be constant, the attachment method of the both is not limited to that described in the above embodiment. Therefore, for example, an attachment method in which the drain pipe 3 is locked at a fixed position of the drain port member 2 using a snap fit may be employed. Further, for example, in the attachment method of the method of screwing (screwing) the other of the two into one of the drain port member 2 and the drain pipe 3, one of the two is attached in a state where both are attached. Or you may employ | adopt the attachment method that it will be in the state by which the screwing of the other side with respect to one side was controlled by the contact part provided in both sides.

  (D) In the said embodiment, although the drain port apparatus 1 is attached to the bottom wall part 101 of the bathtub 100, the attachment object of a drain port apparatus is not limited to the bottom wall part 101 of the bathtub 100. FIG. Therefore, the drain outlet device may be attached to the bottom wall portion of a tank body (for example, a wash bowl or a kitchen sink) other than the bathtub, or may be attached to the bottom wall portion in a washing place of a unit bath or the like. .

  (E) In the above embodiment, the drain port device 1 includes the plug lid 6 for opening and closing the drain port 104 and the support shaft mechanism 5 for moving the plug lid 6 up and down. The shaft mechanism 5 may not be provided. Of course, when the support shaft mechanism 5 or the like is not provided, the attachment member 4 for holding the support shaft mechanism 5 and the member for moving the support shaft 52 up and down (for example, the transmission member 81 and the like) are unnecessary.

  (F) In the above embodiment, the stopper lid 6 (packing portion 62) is configured to close the drain port 104 by contacting the drain port member 2, but the stopper lid 6 (packing portion 62). May contact the bottom wall portion 101 so that the drain port 104 is closed.

  (G) The configuration of the drain pipe 3 is not limited to the configuration described in the above embodiment. Therefore, the drain pipe may be a drain trap having a sealing portion for storing the sealing water, an elbow member having a bent portion, a straight cylindrical member extending in the vertical direction, or the like. Of course, the presence and number of pipes extending from the main body pipe 31 such as the connection pipe 32 can be appropriately changed.

  DESCRIPTION OF SYMBOLS 1 ... Drain port apparatus, 2 ... Drain port member, 3 ... Drain pipe, 7 ... U packing, 21 ... Gutter part, 71 ... Upper tongue piece part, 72 ... Lower tongue piece part, 73 ... Connection part, 74 ... Ring A space 75, a bulging part, 76, a hollow part, 77, a projecting hanging part, 101, a bottom wall part, 104, a drain port.

Claims (4)

A cylindrical drainage port member inserted into a drainage port penetratingly formed in a predetermined bottom wall portion and having a collar portion protruding radially outward at an upper end portion;
Each has an annular upper tongue piece portion and a lower tongue piece portion, and a connecting portion that connects the inner end edges of each tongue piece portion, and opens to the outer periphery composed of each tongue piece portion and the connecting portion. A U-packing into which a portion for forming the drain port in the bottom wall portion is inserted into the annular space;
A cylindrical shape attached to the drain port member in a state where the drain port member is inserted through its inner periphery, and sandwiching the tongue piece portion and the bottom wall portion with the flange portion. With a drain pipe,
In the state where the drain pipe and the drain port member are attached, the drain port device is configured such that the relative position of the drain pipe and the drain port member along the axial direction of the drain port member is a constant position. And
The lower tongue piece portion has a ridge extending over the entire circumference thereof, bulges toward the bottom wall portion side, contacts the bottom wall portion, and has a hollow portion within itself. A drainage device having a bulging portion configured to be crushed and deformable by being provided.   In the cross section including the central axis of the U-packing, at least a portion of the bulging portion, which is located on the tip side, has a shape that gradually tapers toward the forefront of the bulging portion. Item 10. The drain port device according to Item 1. The U-packing has a protruding hanging portion that protrudes downward from the lower portion of the connecting portion,
The protruding hanging portion prevents the drain port member from being inserted more than a certain amount into the drain pipe when the U packing is turned upside down, and makes it impossible or difficult to mount the drain pipe to the drain port member. The drain port device according to claim 1, wherein the drain port device is configured as described above.   The drain port device according to claim 3, wherein the projecting hanging portion is sandwiched between an outer peripheral surface of the drain port member and an inner peripheral surface of the drain pipe.

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