Drain plug device

Abstract: There is provided a remote-operated type drain plug device in which an opening or closing operation of the plug lid can be carried out smoothly for a long period of time in a stable manner. The releasing member S is comprised of a coil-formed inner wire s2 made of metallic material and an outer tube sl made of tetrafluroethylene resin slidably guiding the inner wire s2, the releasing member S is fed into the plug lid 4 from the side part of the plug lid 4 and held there, the outer tube s1 is bent in the plug lid 4 in a downward curved state, the extremity end (the other end) of the outer tube sl is liquid-tightly connected to the bottom part of the plug lid 4, and then a smooth sliding motion of the inner wire s2 is kept for a long period of time under utilization of characteristics of the coil-formed inner wire s2 made of metallic material having durability against the pushing operation and flexibility capable of accommodating for a bending caused by a predetermined resiliency and the outer tube sl having a low tensile strength, low heat-resistance and low frictional resistance.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a drain plug device used in a bath tub and a basin and the like for opening or closing a drain port every time an operating part is pushed. 2. Description of the Related Art In the prior art drain plug device, there has been provided a technology which is disclosed in each of the gazettes of Japanese Patent Laid-Open Nos. Hei 9-324451 and 11-107342, respectively. As shown in Fig. 14; this prior art technology is constituted such that a hollow mechanical box 55 suspended from a plug lid 4 is fitted into a cylindrical guiding part 3 having a bottom part therein arranged at a central part in a drain port 11 in such a way that it can be pulled out or inserted into it, a supporting shaft 14 is inserted into the mechanical box 55 from the lower end of the mechanical box 55, an operating part 6 is arranged in a bath tub 1, a releasing section S having one end connected to the operating part 6 is wired along the inner surface of the bath tub 1 in such a way that the releasing section may not become a hindrance, the other end of an outer tube s3 is connected to the side part of the plug lid 4 and then an inner wire s4 is positioned in the mechanical box 55 while being passed through the plug lid 4. In this prior art, when the operating part 6 is pushed, its extremity end strikes against the upper end of the supporting shaft 14 upon forward motion of the inner wire s4, and further forward motion of the inner wire s4 pushes up the plug lid 4 together with the mechanical box 55 to open a drain port 11 (the plug is opened), a thrust lock mechanism 7 installed in the mechanical box 55 is locked and then a subsequent pushing operation for the operating part 6 causes the lock of the thrust lock mechanism 7 to be released to close the drain port 11 (the plug is closed). Since this prior art enables the drain port 11 to be opened or closed by the pushing operation for the releasing member S wired in the bath tub 1, it is possible to eliminate troublesome external wiring as found in a remote-operated drain plug device wired outside the bath tub or the basin and the like and to prevent a high cost caused by an increased number of component parts with reference to a prevention in leakage accompanied by its outside wiring and the like. However, the releasing member S was constituted such that its outer tube s3 was connected to the side part of the plug lid 4 and only an inner wire s4 was passed through the plug lid 4 with the inner wire being resiliently bent in a feeding hole 44 having a bent part 44a inserted through the plug lid 4 and further drawn into the mechanical box 55, so that it showed a problem that frictional resistance between the plug lid 4 made of synthetic resin and the inner wire s4, in particular at the bent part 44a of the feeding hole 44, became remarkably high, requiring a high force to push the operating part 6, resulting in poor convenience in use . In addition, in recent years, there has been present a request from a user using a bath tub and a basin having a rubber plug to open or close a drain port by pulling up a chain, for changing this rubber plug into the aforesaid remote-operated drain plug device. In view of the foregoing, since the aforesaid prior art is of a type of inner bath tub wiring system, but is not of a type of outer bath tub wiring system, if the system is to be changed, it can be changed in a less expensive manner without requiring any large-scale work. However, it is necessary that an exclusive drain port fixing member (a drain port fitting), having at the central part of the drain port the guiding part for use in guiding the aforesaid mechanical box in such a way that the box can be moved up and down, is newly manufactured when replacing a drain port fixing member (a drain port fitting) for a rubber plug accommodation type, resulting in that the high cost of the member can not be avoided and the replacing work also requires a certain professional skill. SUMMARY OF THE INVENTION The present invention has been invented in view of the aforesaid circumstances described above and it is an object of the present invention to provide a remote-operated drain plug device in which a plug lid opening or closing operation can be carried out smoothly and stably for a long period of time. It is another object of the present invention to provide a remote-operated drain plug device which can be easily retrofitted to an existing drain port. The technical means applied for solving the aforesaid objects consists in providing a drain plug device comprising a hollow plug member suspended from a plug lid and adapted to be moved up and down relative to and at a guiding part arranged at a central part in a drain port, said hollow plug member having a supporting shaft inserted into a lower end thereof, an inner wire, outer tube and releasing member having one end connected to an operating part arranged in a bath tub or a basin and the other end connected to the plug lid, whereby displacement of the inner wire relative to the outer tube by a pushing operation of the operating part causes the extremity end of the inner wire to be abutted against the supporting shaft, causing the plug lid and the hollow plug member to be lifted up together to open the drain port, characterised in that to guide the inner wire of the releasing member in the plug lid to decrease the friction between the inner wire and the outer tube when the drain port is opened the releasing member which enters the plug lid from the plug lid side, is held in the plug lid so as to incline upwardly from its entry point towards the centre of the plug lid where it bends in a downward curved state within the plug lid to a position where the extremity of the outer tube is connected to a bottom part of the plug lid. In accordance with this constitution, a sliding contact relationship between the inner wire and the plug lid is eliminated over the entire length of the releasing member wiring passage and the pushing operation force caused by frictional resistance is made low. In addition, since the coil-like inner wire made of metal material has a sufficient durability against a pushing operation of the operating part and further has a predetermined resiliency as compared with that of a core (an inner wire) composed of a single core wire or a twisted wire, it has a flexibility which can accommodate its bending action. In addition, the outer tube formed of tetrafluoroethylene resin (fluoro resin) has a superior durability in terms of tensile strength as well as superior heat-resistance characteristics. An elongation of the inner wire caused by the sliding motion is scarcely produced and there is no possibility that a sliding stroke of the inner wire shows a dispersion. Further, since the frictional resistance is low, even if the inner wire is curved with a low curvature, the sliding characteristic of the inner wire is not damaged and further even if an inner circumferential surface of it is cut at the sliding location, fluoro resin particles may act as lubricant material and a smooth sliding motion of the inner wire is maintained for a long period of time. Due to this fact, even if the inner wire is bent in a downward curved state within the plug lid, the outer tube may keep a constant and smooth sliding performance of the inner wire for a long period of time. In addition, it is preferable that the releasing member is fed and held with its upward slant state being set toward the central part of the plug lid and the feeding port adjacent to the outside is slightly larger than a diameter of the releasing member. In this configuration, the direction changing part of the releasing member (indicated by a reference symbol S') of which wiring is arranged to extend along the bath tub while feeding and holding the upward slant state, is positioned at a lower location than that of the outer end feeding port as shown in Figs. 2A and 2B, a resilient force generated at the direction changing part (indicated by the reference symbol S') is effectively utilized as a pressing force for pushing the plug lid in a direction where the plug lid is closely contacted with the drain port, and a clearance at the feeding port weakens the contact resistance generated between the releasing member during its use and the feeding port edge when the device is handled and its wear is prevented in advance. Then, the aforesaid guiding part has integrally an annular flange around it through a drain space, the annular flange is mounted and fixed to the edge part of the drain port fixing member (the drain port fixing fitting) constituting the aforesaid drain port, thereby the guiding part can be arranged at the central part in the drain port, and in the case that the guiding part is made separate from the annular flange part and it can be removably arranged from above against the annular flange, the annular flange is mounted and fixed to the edge of the drain port fixing member (the drain port fixing fitting), thereafter it is engaged with the annular flange part from above and thus the guiding part can be arranged at the central part of the drain port. That is, the remote-operated drain plug device can be installed afterwards to the bath tub or the basin or the like where the drain port can be opened or closed with the rubber plug. In addition, in the case that the guiding part and the annular flange part are made separate, the guiding part is made separate from the annular flange to be mounted and fixed to the edge of the drain port fixing member (the drain port fixing fitting) constituting the aforesaid drain port to facilitate cleaning in the drain port. Further, in the case that the aforesaid guiding part is made separate from the annular flange and the aforesaid guiding part is removably engaged with the annular flange from above, the guiding part can be engaged with or removed from it from above and thus a cleaning workability in the drain port is improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front elevational view in section for showing a plug closed state of a first preferred embodiment. Fig. 2A is an enlarged sectional view of a substantial part to show a plug closed state. Fig. 2B is an enlarged sectional view for showing an inlet port part. Fig. 3 is an exploded perspective view for showing a plug lid with a part being broken away. Fig. 4 is a developed view for showing a relation between an ascending or descending member and a thrust lock mechanism installed in the member. Fig. 5 is a developed view for showing a relation among engaging teeth of a rotary ring, stopper teeth and fixed teeth. Fig. 6A is a developed view for showing a relation among engaging teeth of a rotary ring, stopper teeth and fixed teeth so as to illustrate a state of a plug during its opening operation in which an operating part is pushed and operated to cause the engaging teeth at the lower side of the rotary ring to be moved along slant surfaces of the saw-teeth of the fixed teeth. Fig. 6B is a developed view for showing a relation among engaging teeth of a rotary ring, stopper teeth and fixed teeth so as to illustrate a state of opening a plug in which a pushing operation is stopped and the engaging teeth at the upper side of the rotary ring are engaged with the saw-teeth of the engaging teeth. Fig. 6C is a developed view for showing a relation among engaging teeth of a rotary ring, stopper teeth and fixed teeth so as to illustrate a state in which a pushing operation is carried out to cause the engaging teeth at the lower side of the rotary ring to be guided by the slant surfaces of the saw-teeth of the engaging teeth at the lower side of the rotary ring. Fig. 6D is a developed view for showing a relation among engaging teeth of a rotary ring, stopper teeth and fixed teeth so as to illustrate a state in which a pushing operation is stopped, the engaging teeth at the upper side of the rotary ring are guided by the slant surfaces of the saw-teeth of the engaging teeth, and further moved at grooves to close a drain port to be closed with a plug. Fig. 7 is an enlarged sectional view for a substantial part to illustrate a valve opened state. Fig. 8A is an enlarged sectional view for showing an operating part of a second preferred embodiment to illustrate a valve closed state. Fig. 8B is an enlarged sectional view for showing an operating part of a second preferred embodiment to illustrate a valve opened state. Fig. 9 is an enlarged sectional view for showing an operating part of a third preferred embodiment. Fig. 10 is a perspective view for showing an attachment member used in a fourth preferred embodiment with a part being broken away. Fig. 11 is a front sectional view for showing a fixed state of an ascending or descending member together with an attachment member. Fig. 12 is a front sectional view for showing a state of use in which an ascending or descending member is supported by an attachment member. Fig. 13 is a perspective view for showing an attachment member used in a fifth preferred embodiment with a part being broken away. Fig. 14 is a front sectional view for showing a state of use of a prior art drain plug device. DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION Referring now to the drawings, some preferred embodiments of the present invention will be described as follows. Figs. 1 to 7 illustrate a first preferred embodiment of the drain plug device of the present invention, Fig. 8 shows a second preferred embodiment of the drain plug device of the present invention, Fig. 9 shows a third preferred embodiment of the drain plug device of the present invention, Figs. 10 to 12 show a fourth preferred embodiment of the drain plug device of the present invention, and Fig. 13 shows a fifth preferred embodiment of the drain plug of the present invention. At first, the first preferred embodiment will be described, wherein reference symbol A denotes a drain plug device. This drain plug device A is comprised of a drain port fixing member (a drain port fitting) 2 fixed to the opening of the bottom part of a bath tub 1 and constituting a drain port 11; a guiding part 3 arranged at a central part in the drain port 11; a plug lid 4; a hollow plug member 5 suspended from the plug lid 4; a supporting shaft 14 inserted and passed from the lower end of the hollow plug member 5; an operating part 6 removably arranged at the inner surface of the bath tub 1; a releasing member S arranged over the operating part 6 and the aforesaid plug lid 4; and a thrust lock mechanism 7 arranged in the aforesaid hollow plug member 5. The hollow plug member 5 is a hollow cylinder having the plug lid 4 integrally fixed to its upper end, and the supporting shaft 14 is inserted from a guide port 5' at the lower end of the cylinder in such a way that it can be moved up and down. The guiding part 3 is a cylinder having a bottom part which is integrally formed with the aforesaid drain port fixing member (the drain port fitting) 2 through a supporting bracket 21 which is a cross-shape as viewed in its top plan or a forkshape as viewed in its top plan, wherein its inner diameter is formed to be slightly larger than that of the hollow plug member so as to enable the aforesaid hollow plug member 5 to be guided in an upward or downward direction. In addition, the drain port fixing member (the drain port fitting) 2 has a drain space Z in the supporting bracket 21. As shown in Fig. 2A, Fig. 2B and Figs. 4 to 7, the thrust lock mechanism 7 is comprised of a rotary ring 17 rotatably arranged at the upper end of the supporting shaft 14; engaging teeth 151 arranged at the side wall 15 of the hollow plug member 5; fixed teeth 152 arranged at the bottom part of the hollow plug member 5; and a spring 27 biasing the supporting shaft 14 in a pushing-up direction. As shown in Fig. 4, the rotary spring 17 is fitted between the upper and lower flanges 141, 142 arranged at the supporting shaft 14 in such a way that the ring may not be pulled out, and both upper and lower outer surfaces of it are provided with four engaging teeth 171 spaced apart by 90° from each other and engaged with the engaging teeth 151 and the fixed teeth 152. The aforesaid engaging teeth 171 are formed into an approximate lateral faced trapezoidal shape with the upper end and the lower end being applied as slant surfaces, the upper end is engaged with saw-teeth 151a of the engaging teeth 151 to be described later and the lower end is engaged with the saw-teeth 152a of the fixed teeth 152 to be described later, respectively. The fixed teeth 152 and the engaging teeth 151 are oppositely arranged in such a way that the aforesaid saw-teeth 152a, 151a are faced to each other. The fixed teeth 152 are constituted such that a cap 25 for closing the bottom part in the hollow plug member 5, and more particularly a lower releasing part of the hollow plug member is formed with the aforesaid saw-teeth 151. Four engaging teeth 151 are spaced apart by 90° from each other and formed at the side wall 15 of the hollow plug member 5 and each of the lower ends of the four engaging teeth 151 is formed with the aforesaid saw-teeth 151 a, respectively. Between the mutual teeth of the aforesaid four engaging teeth 151 in the aforesaid hollow plug member 5 are cut and formed grooves 35 in which the upper engaging teeth 171 in the aforesaid rotary ring 17 are guided. The spring 27 is present while being compressed between the aforesaid bottom part and the aforesaid lower flange (not shown) preventing the rotary ring 17 from being pulled out. The releasing member S is comprised of a flexible outer tube s1 molded by tetrafluoroethylene resin material (fluoro resin) and a coil-formed inner wire s2 made of metallic material (stainless steel, for example) which is slidably inserted into the outer tube s1. The operating part 6 is constructed such that the upper end of the outer tube s1 in the releasing member S is connected to the lower end of a releasing guide main body 16 having its surface part facing against the inner surface of the bath tub 1 and having its upper surface releasably attached, the inner wire s2 is inserted into the releasing guide main body 16, the upper surface releasing part of the releasing guide main body 16 is closed by a push button 26 moved up and down along the releasing guide main body 16, the inner wire s2 is connected to the lower end of the operating shaft 36 having its upper end fixed to the push button 26, a rear lid 46 is engaged with a surface part opposing against the bath tub 1 at the releasing guide main body 16 and is fixed to a desired position of the inner surface of the bath tub 1 by a fixing means 56 such as a double-sided adhering tape or a suction plate or the like at the rear surface of the rear lid 46. The plug lid 4 is of a hollow cylindrical shape comprised of a disc 24 and a convex-shaped lid part 34 engaged with the disc 24, the other end (the lower end side) of the releasing member S is fed from the side part of the lid part 34 toward the central side of the plug lid 4 in an upward inclined state (15°, for example) and held, and a diameter of its feeding port 341 is set to be slightly larger than a diameter of the releasing member S. The holding part for the aforesaid releasing member S into the plug lid 4 constitutes a holding space P where the releasing member S is held while it is held in an upward slant state with a top bottom part of a raising section 241 raised from and formed by the disc 24 and the bottom section of a guide groove 342 indented at the inner surface of the lid part 34 opposing against the raising section 241, a part of the aforesaid feeding port 341 acting as an outer end of the holding space P is slightly larger than a diameter of the releasing member S so as to assure a clearance between the releasing member S and the edge part of the feeding port 341. Reference numeral 343 denotes a pair of forward and rearward position setting pieces suspended from the edge of the aforesaid guide groove 342 and abutted against both side surfaces of the aforesaid raising part 241 to hold the raising part 241. In addition, the aforesaid holding space P is assured in a length up to a position slightly before the central part of the plug lid 4, the releasing member S is curved from its extremity end in a downward direction with the holding space P being applied as a guide, its extremity end is liquid-tightly connected to the part just above the hollow plug member 5 at the disc 24. The aforesaid liquid-tight connected part is constructed such that a large diameter indentation 242 and a small diameter indentation 243 are set at upper and lower positions and coaxially indented at just a central part of the disc 24, the bottom part of the lower small diameter indentation 243 is opened with a through-pass hole 45 through which only the inner wire s2 is passed in the hollow plug member 5, the extremity end of the outer tube s1 at the aforesaid releasing member S is set in position at the bottom part of the small diameter indentation 243, a part of an O-ring O arranged at the bottom of the large diameter indentation 242 through a washer W fixed to the outer tube s1 is fitted into the large diameter indentation 242 while it is being projected upward, an engaging member 245 having a fork-like engaging piece 245a is engaged with a pair of rails 244 arranged at the disc 24 while holding the large diameter indentation 242 and the small diameter indentation 243 therebetween in such a way that the engaging member can be pulled out of them, thereby the aforesaid O-ring O is depressed and the extremity end of the outer tube s1 is liquid-tightly connected to the disc 24. Reference numeral 246 denotes a drain hole which is opened near a margin of a packing 248 held by a packing receiver 247 projected between it and the hollow plug member 5 at the lower surface of the aforesaid disc 24 so as to drain hot water moved forward through the aforesaid clearance and the like. The other end (the lower end) of the inner wire s2 is positioned to pass through a guide cylinder 248 vertically installed to communicate with the aforesaid through-pass hole 45 and to abut against or approach the bottom part of the indentation 143 indented at the upper end of the supporting shaft 14 as shown in the figure. In addition, between the lower end of the aforesaid supporting shaft 14 and the bottom part of the guiding part 3 is constituted an engaging means M to which the lower end of the supporting shaft 14 is engaged. This engaging means M is constituted by an engaging hole 13 formed at the bottom part of the aforesaid guiding part 3 and an engaging indentation 144 indented near the lower end of the supporting shaft 14, the engaging indentation 144 is engaged with the engaging hole 13, thereby the supporting shaft 14 is prevented from being moved up and down. In the preferred embodiment, at least the lower end of the supporting shaft 14 is cut and slitted to make an axial divided section and to provide a slight resiliency. An object of this arrangement consists in enabling the main body of the device comprised of the plug lid 4, the hollow plug member 5 and the supporting shaft 14 to be pulled out during maintenance operation and the like. Action of the drain plug device constructed as above will be described as follows. The state of the device shown in Figs. 1, 2A and 2B is a plug closed state. Under this plug closed state, the upper and lower engaging teeth 171, 171 of the rotary ring 17 are positioned in a region of the upper ends of the grooves 35. When the push button 26 is pushed from the engaged state shown in Figs. 1, 2A and 2B, i.e. the state shown in Fig. 5, the inner wire s2 is moved forward to push the supporting shaft 14. However, since the lower end of the supporting shaft 14 is engaged with the aforesaid engaging means M in such a way that it can not be moved up and down, the inner wire s2 in finding its way causes the hollow plug member 5 to be lifted up. More particularly, the lower engaging teeth 171 of the aforesaid rotary ring 17 are guided by the grooves 35 while compressing the spring 27, the lower engaging teeth 171 are contacted with the saw-teeth 152a of the fixed teeth 152 and then the hollow plug member 5 is lifted up until the engaging teeth are moved along the slant surfaces of the sawteeth 152a as shown in Fig. 6A (the direction indicated by an arrow shows a moving-up or down direction of the hollow plug member 5 and a rotating direction of the rotary ring 17, and its subsequent Figs. 6B, 6C and 6D are also similarly applied). Then, upon stopping of the pushing operation of the push button 26, the saw-teeth 151a of the engaging teeth 151 descended upon receiving a biasing force of the aforesaid spring 27 are engaged with the upper engaging teeth 171 at the rotary ring 17 to cause the plug lid 4 to be spaced apart upward from the drain port 11 and opened (the plug is opened) (Fig. 7). In the case that the plug kept at this plug opened state is closed again, the push button 26 is pushed, the ascending or plug member 5 is once lifted up against the biasing force of the spring 27, the lower engaging teeth 171 of the rotary ring 17 are contacted with the saw-teeth 152a of the fixed teeth 152 and concurrently the lower engaging teeth 171 are moved along the slant surfaces of the saw-teeth 152a (Fig. 6C), and then upon stopping of the pushing operation of the push button 26, the upper engaging teeth 171 of the rotary ring 17 are guided by the grooves 35 while the upper engaging teeth 171 of the rotary ring 17 are guided by the slant surfaces of the saw-teeth 151a of the engaging teeth 151 descended under the biasing force of the spring 27, resulting in that the hollow plug member 5 is lowered down to the states shown in Figs. 1, 2A and 2B to close the port (close the plug) as described above (Fig. 6D). The releasing member S communicating with the operating part 6 and the plug lid 4 is wired along the inner surface of the bath tub 1 while providing no hindrance against a user. Action of the drain plug device constituted as above will be described as follows. In addition, feeding and holding of the releasing member S in its upward inclined state causes a direction changing part S' of the releasing member S wired along the bath tub 1 to be positioned at a lower location than that of the feeding port 341 as shown in Fig. 7 and then a resilient force can be utilized at the direction changing part S' as a pushing force for pushing the plug lid 4 in such a direction as one in which it is closely contacted with the drain port 11. Then, a second preferred embodiment shown in Fig. 8 will be described as follows, wherein the preferred embodiment is made such that the thrust lock mechanism 7 is not installed within the aforesaid hollow plug member 5 but the thrust lock mechanism 7 is arranged within the operating part 6 and other constituents are similar to those of the aforesaid first preferred embodiment, so that the detailed description about the other constituents will be eliminated. The operating part 6 is of a well-known structure comprised of a releasing guide main body 16, an operating shaft 36 inserted into the releasing guide main body 16 in such a way that it can be moved up and down with one end of releasing member S being connected to its lower end, and a thrust lock mechanism 7 arranged between the operating shaft 36 and the releasing guide main body 16 (refer to the gazettes of Japanese Patent Laid-Open Nos. Hei 9-324451 and 11-107342 and the like). Further, the arrangement in which the releasing guide main body 16 is fixed at the desired position in the bath tub 1 by a fixing means 56 such as a double-sided adhering tape or a suction pad and the like in such a way that it may be removed is similar to that of the aforesaid preferred embodiment. The thrust lock mechanism 7 is comprised of the aforesaid fixed ring 37 arranged at the upper end of the operating shaft 36 within the releasing guide main body 16, the aforesaid rotary ring 47 coaxially, rotatably and freely fitted to a lower part of the operating shaft 36,lower than that of the fixed ring, and a guiding part 57 of the operating part 6 arranged at the inner surface of the releasing guide main body 16, wherein a position setting spring 67 is placed between the upper surface of a protrusion 161 circumferentially arranged at the midway part of the operating shaft 36 and the rotary ring 47 and at the same time a spring 77 is placed between the lower surface of the protrusion 161 and the bottom part of the releasing guide main body 16. This thrust lock mechanism 7 is constructed such that its locking operation and its locked state releasing operation are carried out in an upward or downward motion every time the operating shaft 36 is pushed against a biasing force of the spring 77. The fixed ring 37 is formed such that its lower part has a saw-teeth section (not shown) and its side part has several protrusions (not shown). The rotary ring 47 is of a form well known nowadays having a saw-teeth section (not shown) at its upper part which is coincided with the sawteeth section (not shown) and having several protrusions (not shown) at its side part, wherein the guiding part 57 of the operating part 6 has a form in which a guiding groove (not shown) having the aforesaid fixed ring 37 and the protrusion of the rotary ring 47 entered therein and a saw-teeth section (not shown) are alternatively arranged. Although not shown, the other end (lower end) of the releasing member S is fed into the plug lid 4 from the side part of the plug lid 4 in the same manner as that of the aforesaid preferred embodiment and held in it to cause the outer tube s1 to be bent within the plug lid 4 in a downward curved state and further to cause the extremity end (the other end) of the outer tube s1 to be liquid-tightly connected to the bottom part of the plug lid 4 and then the inner wire s2 is abutted against or approached to the bottom part of the upper end indentation 143 of the aforesaid supporting shaft 14. Action of the drain plug device of the second preferred embodiment having such a configuration as described above will be described as follows, wherein Fig. 8A shows that the thrust lock mechanism 7 is kept at a locked state releasing condition, i.e. the plug lid 4 is kept at its opened state (the plug is closed). When the operating shaft 36 is pushed from this state, the inner wire s2 moves forward to push the supporting shaft 14, although the lower end of the supporting shaft 14 is kept engaged by the aforesaid engaging means M in such a way that it may not be moved, so that the inner wire s2 not finding its destination causes the hollow plug member 5 having the plug lid 4 at its upper end to be lifted up in the same manner as that of the aforesaid preferred embodiment. With such an arrangement as above, the rotary ring 47 is pushed down by the fixed ring 37 to a place below the guide part 57, the saw-teeth of the rotary ring 47 are abutted against the saw-teeth of the fixed ring 37 and slightly rotated and when the pushing operation is stopped, it may receive the biasing force of the spring 77 to cause the protrusion of the rotary ring 47 to be engaged with the saw-teeth of the guide part 57 of the operating part 6, locked at the descending end and then the drain port 11 is opened (the plug is opened) (Fig. 8B). Then, when the operating shaft 36 is pushed, the saw-teeth of the rotary ring 47 are slightly rotated by the saw-teeth of the fixed ring 37 and when the pushing operation is stopped, the rotary ring 47 causes the saw-teeth to be abutted against the saw-teeth of the guide part 57 of the operating part 6 and slightly rotated, thereafter the protrusion enters into the guiding groove to cause its locked state to be released, the plug lid 4 drops automatically together with the hollow plug member 5 to close the drain port (the plug is closed) (Fig. 8A). Then, a third preferred embodiment of the present invention shown in Fig. 9 will be described as follows, wherein this preferred embodiment discloses the drain plug device A in which the thrust lock mechanism 7 is not used, but the plug lid 4 is lifted up together with the ascending or descending member 5 to open the drain port 11 (the plug is opened) and further the drain port 11 is closed (the plug is closed). Further, the feature in which the releasing member S is fed into the plug lid 4 from the side part of the plug lid 4 and held to cause the outer tube s1 to be bent downward in the plug lid 4 under a curved state and further causes the extremity end (the other end) of the outer tube s1 to be connected to the bottom part of the plug lid 4, the inner wire s2 is positioned to be abutted or approached to the bottom part of the indentation 143 recessed at the upper end of the supporting shaft 14 is similar to those of the aforesaid first and second preferred embodiments. In this preferred embodiment, the guide cylinder 76 is projected from the bottom part of the releasing guide main body 16 of the operating part 6 into the inner part, the operating shaft 36 is press contacted with the guide cylinder 76 in such a way that it can be moved up and down, the upper end acting as one end of the inner wire s2 is fixed to the operating shaft 36 and pushed, thereby the plug lid 4 is lifted up together with the hollow plug member 5 in the same manner as that of the first and second preferred embodiments, a descended position of the operating shaft 36 when the drain port 11 is opened (the plug is opened) is held by a press contacting force with the guide cylinder 76, the lifted-up position of the operating shaft 36 when the inner wire s2 advancing forward through the pulling-up operation of the operating shaft 36 is recovered back to its original state is held by the press contacting force with the guide cylinder 76, the hollow plug member 5 and the plug lid 4 are dropped automatically to open the drain port 11 (the plug is closed). In the preferred embodiment of the present invention, since the pulling-up operation is required, it is more preferable to use the inner wire composed of a single core wire or a twisted wire than to use the coil-like inner wire s2 composed of metallic material. Then, the fourth preferred embodiment shown in Figs. 10 to 12 and the fifth preferred embodiment shown in Fig. 13 will be described as follows, wherein the preferred embodiments correspond to the case in which the aforesaid guiding part 3 is of an attachment type to install the drain plug device A indicated in the aforesaid first to third preferred embodiments to the drain port fixing member (a drain port fitting) 2 corresponding to the rubber plug. Figs. 10 to 12 show a system in which the attachment member 23 has integrally an annular flange 231 and a guiding part 232 facing against the annular flange 231 through a drain space Z. Fig. 13 shows a system in which the attachment member 23 has separately the annular flange 231 and the guiding part 232 for it. Both attachment members 23 above are moulded from hard synthetic resin material, wherein the annular flange 231 has an opening with a diameter smaller than that of the upper end of the drain port 11, a double-surface tape 233 is applied to an entire rear surface and this is adhered to and fixed to the upper flange 12 of the drain port fixing member (the drain port fitting) 2 with an adhering force of the double-surface tape 233. In turn, in the case that the guiding part 232 is integrally formed with the annular flange 231, the guiding part 232 is cooperatively arranged through a supporting bracket 234 having a cross-shape as seen in its top plan view. A shape of this guiding part 232 is approximately the same as that of the guiding part 3 integral with the drain port fixing member (the drain port fitting) described in the first to third preferred embodiments and it is apparent that the engaging indentation 144 at the lower end of the supporting shaft 14 is engaged with its bottom part and the engaging hole 13 constituting the aforesaid engaging means M is opened. In addition, in the case of the separate arrangement shown in Fig. 13, the guiding part 232 is applied from above against the annular flange 231 in such a way that it is removably fitted by the engaging means D. This engaging means D is made such that a downward fine tapered cylindrical receiving section 231a is vertically suspended from an opening edge of the annular flange 231, and in turn the extremity end of the supporting bracket 232a having a cross-shape as seen in a top plan view cooperatively arranged at the guiding part 232 is provided with a fitting part 232b fitted in accommodation to the aforesaid receiving section 231a to enclose the guiding part 232, resilient hook pieces 232c resiliently hooked against the lower end of the aforesaid receiving section 231a are properly spaced apart and projected at the lower end of the fitted part 232b, wherein it is manually pulled up against the resilient engaging forces of the lower end of the receiving section 231a and the resilient hook pieces 232c, resulting in that a guiding part 232 having a fitted section 232b and supporting brackets 232a can be pulled out. In addition, irrespective of integral formation or separate formation of the guiding part 232, an annular flange 231 is provided with cut marks 232d concentric with the circumferential edge of the flange 231, the flange is cut off along the cut marks 232d and then a diameter of the annular flange 231 is easily coincided with a diameter of the outer edge of the drain port fixing member (the drain port fitting) 2 which is different by each of the manufacturers. As a form of the aforesaid cut marks 232d, it is satisfactory that a mark line is merely drawn on it or a groove is formed on it. A fine diameter adjustment can be carried out and more convenience in use can be assured if not only a single groove, but also a plurality of grooves are concentrically arranged. In addition, this attachment member 23 is not limited to a system in which it is adhered to the drain port fixing member (the drain port fitting) 2 having no guiding part 3, but it is also possible to perform a direct adhesion of it to the port edge of the drain port 11 and a direct use of it in place of the drain port fixing member 2. It becomes possible to perform a superior outer appearance installation of a remote-operated type drain plug device A having its wiring set in a bath tub of the first to third preferred embodiments even if the drain port fixing member (the drain port fitting) 2 has a different size by each of the manufacturers using the rubber plug by a method wherein the attachment member 23 having the cutting marks 232d is applied at the annular flange 231 however the aforesaid integral formation or separate formation may be made. EFFECTS OF THE INVENTION As described above, since the present invention is constituted such that the releasing member is fed into the plug lid from its side part and bent in a downward curved shape within the plug lid to cause the extremity end of the outer tube to be connected to the bottom part of the plug lid and guide the inner wire in the ascending or descending member and further the inner wire is guided by the outer tube also in the plug lid, a frictional resistance generated when the pushing operation is carried out can be substantially decreased and its operating characteristic becomes remarkably improved as compared with the case in which the inner wire is resiliently bent in a downward curved state at the bent section in the feeding hole in the plug lid and passed through the plug lid. In addition, a releasing member comprised of a coil-like inner wire having a sufficient durability against a pushing force and a flexibility which can be accommodated for the bent part and slid smoothly without requiring any substantial force for the pushing operation at the operating part and an outer tube made of fluoro-resin having the same degree of flexibility as that of the inner wire, a predetermined durability against a tensile force, a high heat-resistance, a superior size holding characteristic and keeping a smooth sliding characteristic of the inner wire for a long period of time is used and the characteristic of the releasing member is utilized, so that even in the case of that as described above, the outer tube is inserted into the plug lid from its side, bent in a downward curved form and connected to the bottom part of the plug lid, it is possible to keep a constant and smooth sliding motion of the inner wire in a stable manner, perform the pushing operation of the operating part with a quite light force and the operability of it is improved. Further, if the releasing member is fed into the plug lid with its upward slant state directing toward the central side of the plug lid and the feeding port adjacent to the outside part has a diameter slightly larger than a diameter of the releasing member, the direction changing part (denoted by the reference symbol S') wired along the bath tub can be positioned at a lower location than that of the feeding port (refer to Figs. 2A and 2B), a resilient recovering force generated at the direction changing part (denoted by the reference symbol S') can be effectively utilized as a pushing force for pushing the plug lid in a direction where it is closely contacted with the drain port and then a clearance at the feeding port can be effectively utilized as a margin for preventing a cut loss of the releasing member in advance. Further, in the case that the guiding part has integrally or separately the annular flange to be mounted on and fixed to the edge of the drain port, the remote-operated type drain plug device wiring in the bath tub can be easily fixed afterwards to the drain port fixing member (the drain port fitting) using the rubber plug and if the guiding part is separate from the annular flange, the guiding part can be removed and it does not become a hindrance when the drain port is cleaned up to its corners and further if its engaging or removing can be carried out from above, it can be rapidly accommodated for it even if the guiding part is damaged. In addition, in the case of the system in which the annular flange is provided with cut marks, it becomes possible to align the edge (outer edge) of the annular flange with an edge diameter (outer edge) of the drain port fixing member (the drain port fitting) using the rubber plug having different size by every manufacturer and so an aesthetic outer appearance of the drain port is not damaged. Having described specific examples of the invention with reference to the accompanying drawings, it will be appreciated that the present invention is not limited to those precise embodiments, and that various changes and modifications can be effected therein by one of ordinary skill in the art without departing from the scope of the invention as defined by the appended claims.

Claims: A drain plug device comprising a hollow plug member (5) suspended from a plug lid (4) and adapted to be moved up and down relative to and at a guiding part (3232) arranged at a central part in a drain port (11), said hollow plug member (5) having a supporting shaft (14) inserted into a lower end thereof, an inner wire (s2), outer tube (s1) and releasing member (S) having one end connected to an operating part (6) arrangeable in a bath tub (1) or a basin and the other end connected to the plug lid (4), whereby displacement of the inner wire (s2) relative to the outer tube (s1) by a pushing operation of the operating part (6) causes the extremity end of the inner wire (s2) at the plug lid (4) to be abutted against the supporting shaft (14), causing the plug lid (4) and the hollow plug member (5) to be lifted up together to open the drain port (11), characterised in that to guide the inner wire (s2) of the releasing member (S) in the plug lid (4) to decrease the friction between the inner wire (s2) and the outer tube (s1) when the drain port (11) is opened the releasing member (S), which enters the plug lid (4) from the plug lid side, is held in the plug lid (4) so as to incline upwardly from its entry point towards the centre of the plug lid (4) where it bends in a downward curved state within the plug lid (4) to a position where the extremity of the outer tube (s1) is connected to a bottom part of the plug lid (4). A drain plug device according to claim 1, wherein said releasing member (S) is comprised of a coil-formed inner wire (s2) made of metallic material and the outer tube (s1) made of tetrafluroethylene resin slidably guiding the inner wire (s2). A drain plug device according to claim 2, wherein said releasing member (S) is fed and held in an upward-directed slant faced to the central part of the plug lid (4) and a diameter of a feeding port (341) adjacent to the outside is slightly larger than a diameter of the releasing member (S). A drain plug device according to claim 3, wherein the guiding part (232) has integrally an annular flange (231) around it through a drain space (Z) and the annular flange (231) is mounted on and fixed to the edge part of said drain port (11) to cause the guiding part (232) to be arranged at a central part in the drain port (11). A drain plug device according to claim 4, wherein said guiding part (232) is made separate from the annular flange (231) and said guiding part (232) is removably fitted from above to the annular flange (231). A drain plug device according to claim 4 or 5, wherein said annular flange (231) is provided with a single or a plurality of cut marks (232d) concentric with a circumferential edge of the flange (231).

Inventors: OHTA IKUMI, OHTA, IKUMI
Applicants: OHTA IKUMI, OHTA, IKUMI
Application year: 2000
Main classification: E03C1
IPC codes: E03C1