JP2012202083A - Bathtub draining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To put a tap closing seal part in close contact with a bathtub to conceal the fastened flange of a drain port, eliminate the need for site mounting work for an opening/closing unit holding part, and then inhibit a water stop failure resulting from the excessive fastening of the fastened flange.SOLUTION: This bathtub draining device comprises fastening amount restricting means 7 for restricting the maximum fastening amount of a fastened flange 4. In the state that the fastened flange 4 is fastened to a maximum while its maximum fastening amount is restricted by the fastening amount restricting means 7, a tap closing seal part 62 is configured to be peripherally close contact with a bathtub 2. Force to counteract the fastening of the fastened flange 4 is desirably configured so that repulsive force against compression by a first compression seal member 5 is maximum.

Description

  The present invention relates to a bathtub drainage device.

  As a drainage device for a bathtub in a unit bath or the like, there is one in which a plug lid that can be moved up and down with respect to a drain outlet can be remotely operated by, for example, a so-called one-push button connected by a wire. The button for remote operation is arranged on the edge (flange portion) of the bathtub. As described above, drainage devices configured to move the plug lid part up and down with respect to the drainage port conventionally have a type in which the flange of the drainage port is exposed (flange exposure type) and a type in which the flange is hidden (flange concealment type). .

  The flange-exposed type is a drainage device of a type in which a closure sealing part of a stopper lid part is in close contact with a fastening flange provided at a drainage port (see, for example, Patent Document 1). A holding portion for holding the open / close unit for moving the stopper lid portion up and down by the drain pipe member is attached to the fastening flange (see FIG. 9).

  The flange concealing type is a drainage device of a type in which the plug sealing portion of the plug lid portion is in close contact with the bathtub surface outside the fastening flange provided at the drainage port (see, for example, Patent Document 2). Also in this case, a holding portion for holding an opening / closing unit that moves the stopper lid up and down is attached to the fastening flange (see FIG. 10).

  By the way, the above-mentioned flange exposure type is not completely covered and covered by the stopper lid part, and the outer peripheral part of the fastening flange is exposed in the bathtub so that it can be seen by the user. May be inferior.

  Moreover, when the holding part for holding the opening / closing unit is attached to the fastening flange as in the conventional flange exposed type and flange concealing type, the connection work of the wire connected to the remote control button is completed before installing the bathtub. I can't. That is, the conventional general fastening flange is configured to be screwed into the drainage elbow or drainage pipe member from above the drainage port of the bathtub, and can only be attached after the bathtub is installed. For this reason, the holding part attached to the said fastening flange will also be installed after bathtub installation. For this reason, after installing the bathtub, the installation operator inserts his / her finger into the narrow drainage port and lifts it by pinching the open / close unit at the end of the wire. I had to do a cumbersome and inefficient work like installing it.

  In view of the actual situation of such a conventional structure, further considering the design aspect, the sealing part for closing is in close contact with the bathtub so as to conceal the fastening flange. In order to make it unnecessary, it is conceivable that the holding portion is attached to, for example, a drain pipe member instead of the tightening flange.

Japanese Patent Laid-Open No. 2004-36079 JP 2010-53539 A

  However, in order to conceal the tightening flange, the closure sealing part is in close contact with the bathtub, and the holding part is attached to the drain pipe member so as to eliminate the need for attaching the holding part in the field. Sometimes water can leak out. That is, with such a configuration, the tightening amount of the tightening flange may become excessively large, and as a result, the compression seal portion is excessively compressed, and the relative height of the drainage pipe member is increased (the tightening of the tightening flange). As a result, when the plug is closed (when the plug lid is in the down position), a gap is generated between the plug seal and the bathtub, and the water is being stored in the bathtub. There is a possibility that water will leak from the gap (water stoppage poor state).

  Therefore, the present invention is to close the sealing flange for the closure so as to conceal the fastening flange of the drain port and eliminate the need for the installation work of the opening / closing unit holding part in the field, and tighten the fastening flange. It aims at providing the bathtub drainage device which suppressed the water stop failure resulting from passing too much.

  In order to solve this problem, the present inventor has made various studies focusing on the structure of the bathtub drainage device. For example, in the case of a conventional bathtub drainage apparatus as described above, the relative height between the holding part and the bathtub does not change even if the tightening amount of the tightening flange is increased. Because of close contact regardless of the amount, there was no problem of poor water stoppage. On the other hand, if it is set as the structure which attaches the said holding | maintenance part to a drain pipe member from a viewpoint of making the attachment operation | work of the holding | maintenance part on-site unnecessary, the new subject which was not in the conventional structure may arise. The present inventor who studied both the conventional problem and the problem that can newly arise has come to obtain knowledge that leads to simultaneous resolution of these problems.

  The present invention is based on such knowledge, and includes a bathtub having a drain outlet formed at the bottom, a drain pipe member provided at a lower portion of the drain outlet, and a fastening flange for fastening and fixing the drain pipe member to the drain outlet. A first compression seal member interposed between the drain port and the drain pipe member and compressed by tightening the clamping flange; and a drain port provided to cover the clamping flange. A stopper lid that moves up and down relative to the lid, a stopper lid that is provided on the stopper lid and closes the gap between the stopper lid and the bathtub when the stopper lid is in the downward movement position, and the stopper lid moves up and down. A drain plug device comprising: an operation unit that remotely controls the operation unit; a transmission unit that transmits the operation of the operation unit to the plug lid unit; and a holding unit that holds the plug lid side end of the transmission unit to the drain pipe member; This is a bathtub drainage device that regulates the maximum tightening amount of the tightening flange. In the state where the tightening flange is tightened to the maximum while the maximum tightening amount is restricted by the tightening amount restricting means, the sealing portion for closing is configured to be in close contact with the bathtub in a circumferential shape. It is characterized by that.

  In the bathtub drainage device according to the present invention, the fastening flange is covered with the plug lid portion and is not visible to the user, so that the design around the drainage port can be improved.

  Moreover, in this bathtub drainage device, since the holding part which comprises a drain plug device is attached to the drainage pipe member instead of the fastening flange, the work of attaching the holding part and the transmission before installing the bathtub The operation | work which connects the plug lid part side edge part of a part can be completed. In this way, if the attachment work of the holding part and the connection work of the transmission part can be completed before installing the bathtub, it is possible to perform the connection work in the factory in advance, so the attachment work of the holding part in the field is not required. Will be able to.

  In addition, this bathtub drainage device is provided with a tightening amount regulating means, and the closure seal portion is in close contact with the bathtub when the tightening flange whose maximum tightening amount is regulated by the tightening amount regulating means is tightened to the maximum. Since it is comprised so that the said sealing part for closure and a bathtub can be made to closely_contact | adhere at the time of closure. Therefore, it can be avoided that the tightening amount of the tightening flange becomes too large and water leaks at the time of closing (a poor water stop state).

  In the bathtub drainage device according to the present invention, it is preferable that the force that opposes the tightening of the tightening flange is configured so that the repulsive force of the compression by the first compression seal material is maximized. When the tightening amount by the tightening flange is insufficient (when the crushing of the first compression seal material is insufficient), the water stop performance at the drain outlet is insufficient, or there is a gap between the plug lid and the bathtub. Due to the fact that the drain plug lid is in the upward movement position due to the fact that it becomes slightly small, the drainage performance deteriorates. Therefore, in order to prevent these, it is necessary to prevent the tightening amount from being insufficient. In this regard, according to the present invention, since the tightening force when tightening the tightening flange can be relaxed, it is possible to easily reach the maximum tightening amount and to prevent the shortage of the tightening amount from occurring.

  The inner diameter of the drain outlet is preferably formed larger than the outer diameter of the fastening flange. In this case, since the frictional force between the outer peripheral surface of the tightening flange and the inner peripheral surface of the drainage port can be reduced, the tightening flange can be easily reached to the maximum tightening amount. Can be deterred.

  Moreover, the bathtub drainage apparatus concerning this invention is provided in the up-down direction clearance gap between the bottom part of a bathtub, and a drain pipe member, and is equipped with the 2nd compression sealing material compressed by tightening a clamping flange. The second compression seal material preferably has a smaller compression resistance than the first compression seal material. In such a case, since the repulsive force of the second compression sealing material can be reduced, the tightening flange can be easily reached to the maximum tightening amount, and the shortage of the tightening amount can be suppressed.

  Further, it is preferable that the tightening amount restricting means is provided in the drain pipe member and restricts the maximum tightening amount of the tightening flange when the lower end of the tightening flange hits. If such a tightening amount restricting means is used, the operator can feel that the lower end of the tightening flange has come into contact with the tightening flange. Workability can be improved.

  Moreover, it is preferable that a holding | maintenance part is positioned in the predetermined position of a drain pipe member by pressing against a clamping flange. In such a case, when the tightening flange is tightened, the holding portion is positioned at a predetermined position of the drain pipe member. Therefore, even if the holding portion is slightly displaced, the holding portion is positioned at the predetermined position. It can be corrected.

  Moreover, it is preferable that the bathtub drainage device further includes positioning means for positioning the drain pipe member at a predetermined position in the horizontal direction with respect to the drain port. By providing such positioning means, it is possible to prevent the occurrence of a horizontal gap between the bathtub and the sealing part for closing at the time of closing.

  Furthermore, the bathtub drainage device according to the present invention includes a first drainage port portion formed at the time of molding, and a second drainage port portion formed at a lower portion of the first drainage port portion and drilled by post-processing. And the sealing portion for closing is configured to be in close contact with the first drain port portion, and the positioning means does not go through the second drain port portion but the first drainage. It is preferable that the opening center of the mouth part coincides with the opening center of the drain pipe member. Since the second drain port portion drilled by post-processing may be misaligned or out of dimension due to the influence of processing errors, the drain pipe may be in contrast to the second drain port portion. If the member is positioned, there is a possibility that a horizontal gap is generated between the bathtub and the plug sealing portion at the time of plugging. In this regard, according to the present invention, since the positioning can be performed without going through the second drain port portion, even when there is a processing error, a horizontal gap is provided between the bathtub and the sealing portion for closing at the time of closing. Can be prevented from occurring.

  According to the present invention, the closure sealing portion is brought into close contact with the bathtub so as to conceal the fastening flange of the drain port, and the installation work of the opening / closing unit holding portion is not required in the field, and the fastening flange is tightened. It is possible to suppress the water stop failure caused by the excess.

It is sectional drawing of the bathtub drainage apparatus which shows one Embodiment of this invention. It is a perspective view around the drain outlet which shows the structural example of a bathtub drainage apparatus. It is a perspective view which shows what attached the drain plug device to the drain pipe member of a fastening flangeless beforehand, and was united. It is a perspective view which shows the structural example around a drain outlet. It is a perspective view which shows an example of a bathtub. It is sectional drawing of the bathtub drainage apparatus which shows other embodiment of this invention. It is a perspective view which shows the structural example of the drain pipe member in other embodiment of this invention. It is a perspective view which shows the example of a structure around the drain outlet in other embodiment of this invention. It is sectional drawing which shows an example of the conventional flange exposure type bathtub drainage apparatus. It is sectional drawing which shows an example of the conventional flange concealment type bathtub drainage apparatus.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 5 show an example of a bathtub drainage device according to the present invention. The bathtub drainage device 1 of the present embodiment is a device further provided with a tightening amount regulating means 7 in addition to the bathtub 2, drainage pipe member 3, tightening flange 4, rubber seal material 5, drain plug device 6 and the like. In the state where the tightening flange 4 is tightened to the maximum while the maximum tightening amount is regulated by the amount regulating means 7, the closure sealing portion 62 of the stopper lid portion 61 is configured to be in close contact with the bathtub 2 in a circumferential shape. Yes.

  The bathtub 2 is formed with an inner tank portion 22 capable of storing bathtub water, and a drain port 21 is formed at the bottom of the inner tank portion 22 (see FIGS. 4 and 5). The drain port 21 of the present embodiment is formed such that its inner diameter is larger than the outer diameter of the fastening flange 4 (see FIG. 1). Further, the flange portion 23 formed so as to protrude outward around the upper edge of the inner tub portion 22 is opened as an operation portion 63 for operating the plug lid portion 61, for example, once pressed to open again. There is a one-push button that closes when pressed.

  An annular rib 24 that protrudes downward is formed on the bottom surface around the drainage port 21 of the bathtub 2. Such an annular rib 24 can function as a positioning means when positioning the drain pipe member 3 at a predetermined position in the horizontal direction with respect to the drain port 21. An annular recess 25 is formed between the annular rib 24 and the drain port 21 (see FIG. 1).

  The drain pipe member 3 is provided below the drain port 21. Although the drain pipe member 3 may be a separate member from the drain elbow, the drain pipe member 3 of the present embodiment has a structure integrated with the drain elbow, and the drain 21 and the washing place through the pipe 11. A drainage trap 12 on the floor (not shown) is connected (see FIGS. 1 and 3). An internal thread 32 into which the fastening flange 4 is screwed is formed on the inner periphery of the opening 31 of the drain pipe member 3. Around the opening 31, a step portion 33 is formed in which a rubber seal material (first compression seal material) 5 is disposed. An annular rib 34 protruding upward is formed around the stepped portion 33. Around the rib 34, a step portion 35 in which the non-drying sealing material (third compression sealing material) 10 is disposed is formed. Further, an annular step 37 is formed at a predetermined position in the opening 31. Further, in the middle of the drainage pipe member 3, a passage hole 36 through which a transmission part (which transmits the operation of the operation part 63 to the plug lid part 61 as will be described later) 64 branches from the drainage pipe member 3. Is formed. The drain pipe member 3 of this embodiment is attached to the bathtub side receiving plate 13 that supports the bathtub 2 (see FIG. 1).

  The fastening flange 4 is a member that fastens and fixes the drain pipe member 3 to the drain port 21. A flange portion 41 having a larger outer diameter than the drain port 21 of the bathtub 2 is formed at the upper end of the fastening flange 4 (see FIG. 1). On the outer peripheral surface of the fastening flange 4, a male screw 42 that is screwed with the female screw 32 of the drain pipe member 3 is formed. In addition, the fastening flange 4 of the present embodiment has an outer diameter of the fastening flange 4 so that the frictional force between the outer peripheral surface of the fastening flange 4 and the inner peripheral surface of the drain port 21 is reduced. It is formed so as to be smaller than the inner diameter of 21 (see FIG. 1, FIG. 4, etc.). If the frictional force between the outer peripheral surface of the tightening flange 4 and the inner peripheral surface of the drain port 21 is reduced, the tightening flange 4 can be more easily reached to the maximum tightening amount. The shortage can be prevented.

  The rubber-based seal material (first compression seal material) 5 is disposed in the step portion 33 of the drain pipe member 3 and is interposed in the vertical gap between the drain port 21 and the drain pipe member 3. The rubber seal 5 is compressed by tightening the tightening flange 4 (see FIGS. 1 and 4). In the present embodiment, a rubber-based material is exemplified as the sealing material, but this is only a preferable example, and a sealing material of other materials can be adopted.

  The drain plug device 6 is a device having a plug lid portion 61, a plug sealing portion 62, an operation portion 63, a transmission portion 64, a holding portion 65, and the like (see FIGS. 1 and 2).

  The plug lid portion 61 is a plug lid having a diameter larger than that of the fastening flange 4 and serves as a blindfold that covers and hides the fastening flange 4. The plug lid 61 is remotely operated by the operation unit 63 and moves up and down with respect to the drain port 21.

  The sealing plug 62 is provided at the bottom of the plug lid 61 and is interposed between the plug lid 61 and the bathtub 2. When the plug lid portion 61 is in the downward movement position, the plug sealing portion 62 closes the gap between the plug lid portion 61 and the bathtub 2 to make the water stop state.

  The operation unit 63 is a means for remotely controlling the vertical movement of the plug lid unit 61. As an example, in this embodiment, a so-called one-push button that opens once when pressed once and closes when pressed again is provided on the flange portion 23 of the bathtub 2 to function as the operation portion 63 (see FIG. 5).

  The transmission unit 64 is a unit that transmits the operation of the operation unit 63 to the plug lid unit 61. As an example, in the present embodiment, one end of the transmission portion 64 composed of the release wire and the outer is connected to the operation portion 63, and the end portion on the plug lid portion 61 side (more specifically, the absorber 641 connected to the end portion). (See FIG. 1 and the like). The absorber 641 moves up and down by reciprocating a part of the operation unit 63 (for example, a central piston unit) by a predetermined stroke. The periphery of the transmission unit 64 is covered with a waterproof tube 642, for example.

  The holding part 65 is provided as a holder that holds the end part of the transmission part 64 on the side of the plug lid part on the drain pipe member 3 (see FIG. 1 and the like). As an example, the holding portion 65 of the present embodiment includes a cylindrical portion 651 that accommodates the absorber 641 of the transmission portion 64, and a leg portion 652 that positions the cylindrical portion 651 at a predetermined position in the opening 31 (FIG. 2). Etc.). The leg portion 652 is formed to be positioned at a predetermined position of the drain pipe member 3 when the holding portion 65 is pressed against the fastening flange 4. According to the holding portion 65 including such a leg portion 652, when the fastening flange 4 is tightened, the holding portion 65 is positioned at a predetermined position of the drain pipe member 3. Even if the position is slightly shifted, it can be corrected to a predetermined position. If the holding part 65 is not located at a predetermined position, the position of the sealing part 62 for closure may be shifted, so that there is a possibility that a water stop failure may occur. However, according to the present embodiment, such a situation is avoided. be able to. The leg portion 652 of this embodiment is composed of, for example, four blades arranged every 90 degrees, and is attached to the inside of the drain pipe member 3.

  Moreover, in the bathtub drainage apparatus 1 of this embodiment, the foaming-type sealing material (2nd compression sealing material) 9 and the non-drying sealing material (3rd sealing material) 10 are provided. The foam-type sealing material 9 is provided so as to be sandwiched between the rib 34 of the drain pipe member 3 and the annular recess 25 on the bottom surface of the bathtub, and the non-drying sealing material 10 includes the annular rib 24 of the bathtub 2 and the drain pipe member 3. It is provided so that it may be pinched | interposed between this step part 35. When the tightening flange 4 is tightened, the gap between the bottom surface of the bathtub 2 and the drain pipe member 3 is gradually reduced, and the seal materials 9 and 10 are compressed and crushed accordingly, whereby the bathtub 2 and the drain pipe member 3 are Increase water tightness between. In the present embodiment, foamed or non-drying materials are exemplified as these sealing materials, but this is only a preferred example, and sealing materials of other materials can be employed.

  Here, it is preferable that the foaming sealing material 9 provided as the second compression sealing material has a lower compression resistance than the rubber sealing material (first compression sealing material) 5 described above. As described above, when the fastening flange 4 is tightened, the sealing materials 9 and 10 are compressed. At this time, if the repulsive force of the foamed sealing material 9 is reduced, the tightening flange 4 is tightened to the maximum amount. Therefore, it is easy to prevent the shortage of tightening amount from occurring.

  In this embodiment, the repulsive force during compression by the rubber-based seal material (first compression seal material) 5 is the repulsion force during compression by the foam-based seal material (second compression seal material) 9 or non-drying property. The repulsive force at the time of compression by the sealing material (third compression sealing material) 10 is made larger. In such a case, in the bathtub drainage device 1, as the force that opposes the tightening force of the tightening flange 4, the repulsive force at the time of compression by the rubber seal material 5 is maximized. Can be relaxed. According to this, the tightening flange 4 can be more easily reached to the maximum tightening amount, and the shortage of the tightening amount can be suppressed.

  The tightening amount restricting means 7 is a means for restricting the maximum tightening amount of the tightening flange 4. A specific example of the tightening amount regulating means 7 is not particularly limited. For example, in the present embodiment, the cylindrical pedestal having a predetermined height has its lower end surface abutted against the stepped portion 37 in the opening 31. It is made to function as the tightening amount restricting means 7 for restricting the tightening amount when the lower end of the tightening flange 4 in the middle of tightening abuts (see FIG. 1 and the like). The tightening amount restricting means 7 provided in this way serves as a stopper that prevents further tightening after the lower end of the tightening flange 4 in the middle of tightening hits.

  In this embodiment, the maximum tightening amount of the tightening flange 4 is restricted by the tightening amount restricting means 7 as described above, and the closing seal portion 62 is in close contact with the bathtub 2 when the tightening flange 4 is tightened to the maximum. (See FIG. 1). If the tightening amount of the tightening flange 4 is too large, the relative height of the bathtub 2 with respect to the holding portion 65 and the absorber 641 is lowered, and a gap is generated between the plug sealing portion 62 and the bathtub 2 at the time of closing. In this embodiment, the maximum tightening amount of the tightening flange 4 is regulated in this manner, so that the sealing portion 62 for closing is surely in close contact with the bathtub 2. According to this, it is possible to avoid a state in which water leaks out when the plug is closed (water stoppage poor state) regardless of which worker performs the installation work.

  As described above, in the bathtub drainage device 1 of the present embodiment, the holding portion 65 constituting the drainage plug device 6 has a structure that is attached to the drainage pipe member (drainage elbow) 3 instead of the fastening flange 4. Regardless of the tightening operation of the tightening flange 4, the holding portion 65 can be attached to the drain pipe member 3 in advance. According to this, since it becomes possible to complete the operation | work which attaches the holding | maintenance part 65, or the operation | work which connects the edge part by the side of the lid part of the transmission part 64 in the step before bathtub installation, connection work is beforehand carried out in a factory. It is possible to ship in a united state by setting the drain plug device 6 such as an opening / closing unit (absorber 641, cylinder 651, leg 652 etc.) of the plug lid 61 to the drain pipe member 3. (See FIG. 3).

  In addition, when the work of inserting the transmission part 64 through the thin drain port 21 and connecting to the plug lid part 61 is performed in the field as in the prior art, the tip of the transmission part 64 is caught and bent during the work. In some cases, the operation may be insufficient. However, according to the bathtub drainage device 1 of the present embodiment that does not require on-site insertion and connection work, such a situation can be avoided. it can.

  Moreover, in the bathtub drainage apparatus 1 of this embodiment, the fastening flange 4 is covered with the plug lid portion 61 and is not visible to the user (see FIG. 1 and the like). According to this, the design around the drain port 21 can be improved, and the portion between the fastening flange 4 and the bathtub 2 where dirt easily adheres can also be concealed so as not to stand out. .

  Moreover, according to the bathtub drainage device 1 of the present embodiment, as described above, the closure sealing portion 62 is brought into close contact with the bathtub 2 to conceal the fastening flange 4, and the attachment work of the holding portion 65 and the like is performed on site. In addition to making unnecessary (including insertion work and connection work), it is possible to suppress water stop failure due to excessive tightening of the tightening flange 4. In other words, in the present embodiment, the tightening amount regulating means 7 is used to prevent the tightening flange 4 from being tightened too much (the tightening amount becomes too large), thereby preventing the relative height of the bathtub 2 from being lowered. Therefore, irrespective of the ability of the installation operator, it is possible to reliably close the sealing portion 62 for closing and the bathtub 2 at the time of closing, and to uniformly prevent a water stop failure.

  In the present embodiment, as the tightening amount restricting means 7, for example, a pedestal-shaped member that restricts the maximum tightening amount of the tightening flange 4 by abutting the lower end of the tightening flange 4 is used. If such a tightening amount restricting means 7 is used, the operator can feel that the lower end of the tightening flange 4 has come into contact with the tightening flange 4 during the installation work. Accordingly, it is possible to improve workability by preventing the operator from tightening the tightening flange 4 more than necessary.

  In addition, in the bathtub drainage device 1 of the present embodiment, the annular rib 24 formed on the bottom surface around the drainage port 21 of the bathtub 2 positions the drainage pipe member 3 at a predetermined position in the horizontal direction with respect to the drainage port 21. Can function as positioning means. Therefore, it is possible to prevent the occurrence of a horizontal gap between the bathtub 2 and the plug sealing portion 62 when the plug lid 61 is closed.

  Further, in such positioning means, the first drain port portion 211 is formed at the time of bathtub molding, and another drain port portion (second drain port portion is formed below the first drain port portion 211 in the subsequent process. This is also effective in the bathtub drainage device 1 having the structure 212). The second drain port portion 212 drilled by post-processing may be displaced from the original position due to the influence of the processing error or the dimensions may be violated. On the other hand, if the drain pipe member 3 is positioned, a horizontal gap may be generated between the bathtub 2 and the plug sealing portion 62 when the plug is closed. In this respect, in the bathtub drainage device 1 of this embodiment provided with a member functioning as a positioning means (for example, the annular rib 24), the drainage pipe member 3 can be positioned without going through the first drainage port 212. For this reason, even if there is a processing error, it is possible to prevent a horizontal gap from being generated between the bathtub 2 and the plug sealing portion 62 when the plug is closed. The first drain port 211 is, for example, a recess (dent) formed at the lowest part of the bathtub bottom, and the second drain port 212 is drilled, for example, at the center of the bottom of the recess (depression). It is a through hole.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, although the example which applied this invention to the bathtub drainage apparatus 1 without a bathtub waterproofing pan (heat insulation pan) was shown in this embodiment, it can apply this invention also to the bathtub drainage apparatus 1 with a bathtub waterproofing pan. Needless to say. In FIG. 6, an example of the bathtub drainage apparatus 1 at the time of providing the bathtub waterproofing pans 14-16 is shown. The bathtub waterproof pans 14 to 16 are supported on a gantry (not shown), and are made of, for example, a foam-based heat insulating material, and waterproof to prevent leakage of hot water to the outside of the bathtub waterproof pans 14 to 16. It has heat insulation for realizing the heat retaining property of the hot water stored in the bathtub 2. The bathtub 2 is installed above the bathtub waterproof pans 14 to 16.

  Moreover, although the example which used the drain pipe member 3 of the structure integrated with the drain elbow was shown in embodiment mentioned above (refer FIG. 1 etc.), the drain pipe member (drain valve plate) separate from a drain elbow Naturally, it is possible to use 3 (see FIG. 6). In FIG. 6, the drain elbow is indicated by reference numeral 30, the flange member is indicated by reference numeral 17, and the U-shaped packing is indicated by reference numeral 18. In the case of such a structure, the work of attaching the holding part 65 to the drain pipe member (drainage valve plate) 3 and the work of connecting the end part of the transmission part 64 on the plug lid part side are performed in the factory in advance. The drain plug device 6 such as an opening / closing unit (absorber 641, cylinder portion 651, leg portion 652, etc.) can be set in the drain pipe member 3 and shipped as a unit (see FIGS. 7 and 8). .

  In the embodiment shown in FIG. 6 and the like, a stopper including a step portion is formed on the inner periphery of the drain pipe member 3, and the stopper functions as the tightening amount regulating means 7. In this case, the drain pipe member 3 comes into direct contact with the lower end of the fastening flange 4 without going through the base (tightening amount regulating means) as described above.

1: Bathtub drainage device 2: Bathtub 3: Drainage pipe member 4: Clamping flange 5: Rubber-based sealing material (first compression sealing material)
6: Drain plug device 7: Tightening amount regulating means 8: Positioning means 9: Foam-based sealing material (second compression sealing material)
21: Drain port 24: Annular rib (positioning means)
61: Plug lid portion 62: Sealing seal portion 63: Operation portion 64: Transmission portion 65: Holding portion 211: First drain port portion 212: Second drain port portion

Claims (8)

A bathtub with a drain outlet at the bottom;
A drain pipe member provided at a lower portion of the drain port;
A fastening flange for fastening and fixing the drain pipe member to the drain port;
A first compression seal member interposed in a vertical gap between the drain port and the drain pipe member, and compressed by tightening the clamping flange;
A stopper lid portion that is provided so as to cover the fastening flange and moves up and down with respect to the drain port; and provided in the stopper lid portion, and when the stopper lid portion is in a downward movement position, A sealing part for plugging that closes a gap with the bathtub, an operation part for remotely operating the vertical movement of the plug cover part, a transmission part for transmitting the operation of the operation part to the plug cover part, and the plug of the transmission part A drainage device having a holding part that holds the lid side end to the drain pipe member, and a bathtub drainage device comprising:
A tightening amount restricting means for restricting the maximum tightening amount of the tightening flange;
In the state where the tightening flange is maximally tightened while the maximum tightening amount is regulated by the tightening amount regulating means, the plug sealing portion is configured to be in close contact with the bathtub in a circumferential shape. Bathtub drainage device.   2. The bathtub drainage device according to claim 1, wherein the force that opposes the tightening of the tightening flange is configured such that a repulsive force of compression by the first compression seal member is maximized.   The bathtub drainage device according to claim 2, wherein an inner diameter of the drainage port is formed larger than an outer diameter of the fastening flange. A second compression sealant interposed between the bottom portion of the bathtub and the drain pipe member and compressed by tightening the fastening flange;
The bathtub drainage device according to claim 1, wherein the second compression seal material has a smaller compression resistance than the first compression seal material.   2. The tightening amount restricting means is provided on the drain pipe member and restricts the maximum tightening amount of the tightening flange when the lower end of the tightening flange hits. The bathtub drainage device described.   The bathtub drainage device according to claim 1, wherein the holding portion is positioned at a predetermined position of the drain pipe member by being pressed against the fastening flange.   The bathtub drainage device according to claim 1, further comprising positioning means for positioning the drain pipe member at a predetermined position in a horizontal direction with respect to the drain port. The drainage port has a first drainage port portion formed at the time of molding and a second drainage port portion formed in the lower part of the first drainage port portion and drilled by post-processing,
The plug sealing portion is configured to be in close contact with the first drain port portion,
8. The positioning means is configured to align an opening center of the first drain port portion with an opening center of the drain pipe member without using the second drain port portion. The bathtub drainage device described.