JP2002088854A - Thrust lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thrust lock mechanism preventing the occurrence of an miss operation phenomenon without using a separate member. SOLUTION: A drainage ditch 611 is laid to communicate with a locking tooth 61 on the inner surface of a guide cylinder K. The quantity of water staying on the locking tooth 61 is thereby suppressed less by the guide action of the drainage ditch 611 even if water enters the guide cylinder K in long-term use, and close contact force between an engaged tooth 311 of a rotating ring 31 and the locking tooth 61 on the inner surface of the guide cylinder K in the unstopped state is weakened. Even if the freely rotatable state of the rotating ring 31 occurs in the initial stage of shifting from the unstopped state to the closed state, a surface tension phenomenon of lifting the engaged tooth 311 in a reverse rotating direction between the engaged tooth 311 of the rotating ring 31 and the locking tooth 61 on the inner surface of the guide cylinder K is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust lock mechanism for remotely opening and closing a drain plug provided on a tank such as a bathtub or a basin.

[0002]

2. Description of the Related Art A thrust lock mechanism is disclosed in Japanese Utility Model Publication No. 7-264.
As is well known in Japanese Patent No. 64,641 and the like, a support shaft having a fixed ring having engaging teeth on the upper surface and a rotating ring having engaged teeth on the lower surface coaxially, and locking teeth formed on the inner surface; A guide cylinder accommodating the support shaft so as to be vertically movable, and a return spring of the support shaft for urging the support shaft in a plugging direction. Further, the operation of the thrust lock mechanism from closing to opening will be described in detail below. First, the pressing force by the remote operation of the operation unit is transmitted to the support shaft via the release wire, and then,
The pressing force pushes the support shaft against the urging force of the return bomb, so that the fixing ring pushes the rotating ring up above the locking teeth formed on the inner surface of the guide cylinder. that time,
The rotating ring rotates in the forward direction due to the meshing relationship between the engaging teeth of the fixed ring and the engaged teeth of the rotating ring, and when the pressing force is lost, the support shaft receives the urging force of the returning elastic machine, Start descending with the rotating ring. However, during the lowering, the engaged teeth are locked by the locking teeth formed on the inner surface of the guide cylinder, and stopped in the open state to complete the desired opening operation. On the other hand, the operation from opening to closing is as follows. The pushing force by the remote operation of the operation unit pushes the support shaft via the release wire, and the fixing ring and the rotating ring are pushed up with the pushing force, so that the engaging teeth of the fixed ring and the engaged teeth of the rotating ring mesh with each other. Due to the relationship between the two teeth, the rotary ring further rotates by a small angle in the positive direction. When the pushing force is lost, the support shaft starts descending together with the rotating ring under the urging force of the return spring. Here, when the engaged tooth engages with the sawtooth portion at the outer end of the locking tooth, the rotating ring further rotates in the forward direction, and the rotating ring is guided by the guide groove by the guide function of the sawtooth portion. It descends with the support shaft and shifts to the closed state. As described above, the thrust lock mechanism is a mechanism that alternately repeats locking and unlocking each time a pressing operation by a release wire is performed.

Further, as a drainage device that opens and closes a drain plug using this thrust lock mechanism, a manual operation force of an operation unit is transmitted to a thrust lock mechanism via a release wire, and is supported by the thrust lock mechanism. The drainage part can be opened and closed by moving the stopper lid up and down.
As disclosed in JP-A-2000-73426 or JP-A-2000-73426, the driving force of a solenoid or a motor is transmitted to a thrust lock mechanism via a release wire, whereby the cap is similarly moved up and down via the thrust lock mechanism. The opening and closing of the drainage portion is disclosed in
No. 73426 has the convenience that both the electric operation and the manual operation can be appropriately performed so that the drainage section can be opened and closed even during a power failure.

[0004] The return spring of the support shaft incorporated in the thrust lock mechanism includes a top portion of a guide cylinder for accommodating and guiding the support shaft, and a flange portion formed on the outer periphery of the support shaft close to the upper surface of the rotating ring. The rotating ring is rotatably supported with a clearance (less than about 1 mm) between the flange and the fixed ring. Therefore, in reality, at the initial stage of the transition from the open state to the closed state, or at the final stage of the transition from the closed state to the open state, the biasing force of the support shaft returning elastic is temporarily applied to the rotating ring. And there is a state where the engagement of the fixing ring with the engagement teeth is not established, that is, a state where the rotating ring can freely rotate. In addition, in this thrust lock mechanism, since the support shaft of the stopper is accommodated in the guide cylinder so as to be able to move up and down, although a small amount of drainage enters from the sliding portion, the drainage is formed into a saw-toothed shape on the inner surface of the guide cylinder. In some cases, a water film may be formed on the upper surface of the locking teeth, the upper surface of the rotating ring, the bottom of the guide cylinder, and the surfaces of the engaging teeth and the engaged teeth.

Therefore, when the rotating ring is freely rotatable in the initial stage of transition from the opened state to the closed state, the surface of the rotating ring formed by a water film between the upper surface of the rotating ring and the flange portion is brought into close contact therewith. A tension phenomenon and a surface tension phenomenon that reversely rotates the rotating ring due to a water film between the locking teeth on the inner surface of the guide cylinder and the engaged teeth of the rotating ring occur. Due to the two surface tension phenomena, the engaged teeth of the rotating ring that can freely rotate do not rotate by a small angle in the positive direction when ascending, but the saw teeth of the locking teeth rise to the guide surface and reverse. In other words, a so-called idle operation phenomenon may occur, in which the piston rotates in the direction, and when it descends, it is locked again by the locking teeth formed on the inner surface of the guide cylinder and is opened.

In the thrust lock mechanism, scale is accumulated in the serrated locking teeth on the inner surface of the guide cylinder and the engaging teeth of the fixing ring for a long time, and the engaged teeth of the rotating ring are formed by the frictional resistance of the scale. An idle operation phenomenon similar to the above-described surface tension phenomenon may occur without being smoothly guided by the engaging teeth of the fixing ring and the engaging teeth of the inner surface of the guide cylinder. The empty operation phenomenon is particularly problematic when centrally controlling drain plugs, water supply, and hot water supply in a kitchen, dining room, or the like where the open / closed state cannot be visually confirmed. For example, if water is supplied from a water heater or the like that is linked to the operation of the power supply switch while the drain cock is open due to the empty operation phenomenon, water is dripped until a household member notices, and a large amount of water or Water heater fuel is wasted. Also,
In the case of controlling from outside the home by remote control, there is a risk of abnormal heating of the water heater and the like, which is also dangerous. In order to prevent this, for example, a method has been proposed in which the rotating ring itself is weighted and the rotating ring is rotated so that the rotating ring does not operate idle. However, if the entire rotating ring is made of metal or a metal sleeve is provided integrally, it is not cost-effective and requires some contrivance.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a thrust lock mechanism for preventing the occurrence of the idling operation phenomenon without using a separate member. To provide. More specifically, it is an object of the present invention to provide a thrust lock mechanism that prevents an idle operation phenomenon caused by reverse rotation of a rotating ring due to a surface tension phenomenon without using a separate member. Another object of the present invention is to provide a thrust lock mechanism that prevents the idle operation phenomenon by reducing the frictional resistance by devising the shape of the engaged teeth of the rotating ring.

[0008]

The technical means taken to solve the above-mentioned object is to transmit the driving force via a release wire by manual remote control or electric remote control, or both remote control. In a thrust lock mechanism for opening and closing a drain plug provided on a bath body such as a bathtub or a basin, a drain groove communicates with a locking tooth formed on an inner surface of a guide cylinder.

According to this technical means, since the drainage groove communicates with the locking teeth on the inner surface of the guide cylinder, even if water enters the guide cylinder during long-term use, the water is guided by the drainage groove. The amount of water stagnating on the teeth is reduced. Therefore, the adhesion between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder in the opened state is weakened. Even if the rotating ring is freely rotatable at the initial stage of the transition from the opened state to the closed state, the engagement between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder occurs. This prevents a surface tension phenomenon in which the false tooth is lifted in the reverse rotation direction, and thus prevents the occurrence of the idling operation phenomenon.

[0010] Further, it is more effective if the engaged teeth of the rotating ring are formed in a line contact or point contact with the engaging teeth of the inner surface of the guide cylinder and the engaging teeth of the fixed ring. . The line contact shape is, for example, a convex curved surface shape, and the point contact is, for example, a spherical shape or the like.

According to this technical means, the contact force between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder is further reduced. Therefore, the surface tension phenomenon in which the engaged teeth are lifted in the reverse rotation direction between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder is prevented.

Further, it is more preferable that one or a plurality of grooves having both ends opened are formed in the engaged teeth of the rotating ring. In this case, the grooves are in the tooth length direction and / or the tooth width direction.

According to this technical means, the entering water is removed from the drainage groove, and the adhesion between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder is further reduced. Therefore, even if the rotating ring is allowed to freely rotate in the initial stage of the transition from the open state to the closed state, the rotating ring is engaged between the engaged teeth of the rotating ring and the locking teeth on the inner surface of the guide cylinder. Air enters through the grooves of the engaging teeth and drains water between the engaged teeth and the locking teeth to prevent the occurrence of a surface tension phenomenon.

Further, a thrust for opening and closing a drain plug provided in a bath body such as a bathtub or a basin by transmitting a driving force through a release wire by manual remote control or electric remote control, or remote control by both of them. In the lock mechanism, it is also effective if the engaged teeth of the rotating ring are formed in a line contact or point contact with the locking teeth on the inner surface of the guide cylinder and the engaging teeth of the fixed ring.

According to this technical means, the frictional resistance of the engaged teeth of the rotating ring against the engaging teeth of the inner surface of the guide cylinder and the engaging teeth of the fixed ring is reduced due to the line contact shape and the point contact shape. Therefore, the engaged teeth of the rotating ring rotate smoothly even if the scale is attached to the locking teeth on the inner surface of the guide cylinder or the engaging teeth of the fixing ring in a long-term use.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a first embodiment of a drainage device using the thrust lock mechanism of the present invention, FIG. 4 (a) shows the second embodiment, and FIG. 4 (b) shows the same. FIG. 5 shows the third embodiment, FIG. 5 shows the fourth embodiment, FIG. 6 shows the fifth embodiment, FIG. 7 shows the sixth embodiment, and FIGS. FIG. 9 shows a seventh embodiment. First, the first embodiment will be described.
Reference symbol A denotes a drainage unit having a thrust lock mechanism 1, B
Is an operation unit.

The drain A is provided with a drain fitting 100 having a flange 101 attached to a drain 201 provided at the bottom of a tank 200 such as a bathtub or a basin, and connected to a guide tube 300 of a release wire W. The driving force from the operation section B is transmitted to the thrust lock mechanism 1 provided in the drainage fitting 100 via the release wire W, and the stopper 2 is alternately opened and closed.

The thrust lock mechanism 1 has a well-known structure, and includes a support shaft 11 having a fixed ring 21 and a rotating ring 31 provided coaxially with the rotating ring 31 facing upward,
A guide cylinder K for accommodating the support shaft 11 in a vertically movable manner and a return spring 41 for the support shaft for urging the support shaft 11 in the closing direction are provided. 2
The rotating ring 31 is rotatably loosely fitted to a collar 111 having engagement teeth 311 on the lower surface thereof and protruding from the support shaft 11 on the fixed ring 21.
It is the same as the related art that a locking tooth (sawtooth shape) 61 is provided on the upper surface via the guide groove 51.

The return spring 41 of the thrust lock mechanism 1 is interposed between the flange 111 and the top of the guide tube K, and constantly urges the support shaft 11 downward, ie, in the closing direction. In the present invention, the sawtooth-shaped locking teeth 61 are provided with drain grooves 61.
1 is connected.

The operation unit B includes a manual button 3 for operating at the time of manual operation, and a solenoid movable iron core 4 driven at the time of energization.
A stationary core 5, a coil 6, a case 7 for accommodating them, a connection shaft 8 for connecting the manual button 3 and the solenoid movable core 4, and a cross member for transmitting power to the release wire W from the solenoid movable core 4. 9 and back auxiliary ammunition 10
And a stopper member 12 for preventing the solenoid movable iron core 4 and the like from jumping out due to the urging force of the return auxiliary ammunition 10, a solenoid operation case 13 for housing these members, and the solenoid operation case 13 fixed to the tank body 200. And a fixed case 14.

The above-mentioned solenoid operation case 13 includes:
Return the auxiliary ammunition 10 to the lowermost part in the same case 13,
A cross member 9 is arranged on the return auxiliary ammunition 10, and a solenoid movable core 4, a fixed iron core 5, a case 7 containing a coil 6, and a stopper member 12 are assembled on the upper part of the cross member 9 in this order. It is attached to the movable iron core 4. The solenoid operation case 13 and the release wire W are assembled by screwing a case fixing screw through the inner wire w1 of the release wire W from below into a screw hole provided at a lower portion of the solenoid operation case 13. On the other hand, the drain-side end of the release wire W is screwed into the bottom of the guide tube K of the thrust lock mechanism 1, and the manual button 3 is attached to the connecting shaft 8.

As shown in FIG. 1, a magnet 400 for detecting the open / closed state of the stopper 2 is attached to the side or lower portion of the manual button 3 and the solenoid operation case 13 is attached to the manual button 3. A member 50 that reacts with the magnet 400 and sends a signal to a drain cock control device (not shown).
0 is provided to prevent malfunction of opening and closing the lid 2.

Next, the manual remote operation of the drainage device assembled as described above and the operation of each member will be described. When the manual button 3 is pressed from the state shown in FIG. 3 (the engaging teeth 311 solid line of the rotating ring 31), the connection shaft 8 and the solenoid movable iron core 4 push the cross member 9, and the inner wire w
1 moves to the drainage section A side, pushes up the stopper lid 2 and opens the stopper. At this time, the thrust lock mechanism 1 in the drainage section A operates to maintain the open state. That is, the engagement tooth 211 of the fixed ring 21 is rotated by pushing the support shaft 11 against the urging force of the return bullet 41 and the return auxiliary bullet 10 with the pushing force of the manual button 3 against the inner wire w1. The guide cylinder K uses the engaged teeth 311 of the ring 31 as the guide grooves 51 as guides.
Is pushed up to above the serrated locking teeth 61 formed on the inner surface of the. When the pushing force is lost, the return bomb 41
The support shaft 11 starts to descend together with the rotating ring 31 under the urging force of the above, and the engaged tooth 311 is engaged with the engaging tooth 61 in the middle of descending, and the plug is opened. When the manual button 3 is pushed again, the cross member 9 pushes down the inner wire w1 and pushes up the fixing ring 21 and the rotating ring 31 together with the support shaft 11 to thereby engage the engaged teeth 311 of the rotating ring 31.
Engages with the engaging teeth 211 of the fixed ring 21 to further rotate the rotating ring 31 by a small angle in the forward direction. When the pushing force is lost, the support shaft 11 is lowered together with the rotating ring 31 by receiving the urging force of the return spring 41. On the way, the engaged tooth 311 is engaged with the sawtooth portion at the outer end of the locking tooth 61, and the rotating ring 31 further rotates in the forward direction, and is guided by the guide groove 51 by the guide function of the sawtooth portion. The rotating ring 31 descends together with the support shaft 11 to be in a closed state.

In the case of electric remote control, the coil 6 is energized by pressing a switch 601 on an operation panel 600 provided in a bathroom, a washroom or other places, so that the solenoid movable iron core 4 is moved to the fixed iron core 5 side. It moves and pushes down the cross member 9, and opens the drainage section A on the same principle as manual remote control. When the switch is energized 602 again, the solenoid movable iron core 4 pushes down the cross member 9 and at the same time the thrust lock mechanism 1 is released, and the respective members are returned to the original state by the urging force of the return bullet 41 and the return auxiliary bullet 10. Return to the condition and close. Since the energizing operation is the same as in the manual operation, the plug can be opened and closed without any trouble even if the manual remote operation and the electric remote operation are alternately performed.

The manual button 3 is provided with a magnet 400 and a member 500 that responds to the magnet so that the user can clearly identify the position of the stopper 2. Manual button 3 when open
The upper surface is substantially flush with the fixed case 14, and the magnet 400 attached to the manual button 3 is spaced apart from the member 500 provided in the operation case 13 so that it does not react and the signal is also discharged. The operation panel 60 is not sent to the stopper control device.
The lamp 603 in the closed state of 0 is turned on. Regardless of whether the manual button 3 is operated manually or remotely, when the stopper 2 is lifted and opened, the magnet 400 of the manual button 3 which has been lowered to a predetermined position and the member 500 react to transmit a signal. The operation panel 600 is sent to the drain plug control device, and the lamp 604 indicating the open state of the operation panel 600 is turned on. Thus, the user can be informed of the position of the cap 2 and erroneous operation can be prevented. Even when the apparatus is interlocked with a water heater or the like, the drain plug control device can control the cap 2.
Is controlled so that safety measures can be taken such that hot water is not supplied in the open state.

In the present invention, the drain groove 611 is communicated with the serrated locking teeth 61 formed on the inner surface of the guide cylinder K as described above.

As shown in FIG. 3, the drain groove 611 is formed at the inclined lower end of each of the sawtooth-shaped locking teeth 61 at a height up to the bottom of the guide cylinder K. However, the height may be halfway. The position of the locking teeth 61 may be freely formed in the middle of each locking tooth 61. The drain groove 611 allows the water to drain (fall) without stagnating in the saw-tooth-shaped locking teeth 61 even if water enters the guide cylinder K in a long-term use. It has the function of reducing the amount of stagnant water. As a result, even if the rotating ring 31 can freely rotate in the initial stage of the transition from the open state to the closed state, the surface tension between the engaged teeth 311 and the locking teeth 61 on the lower surface of the rotating ring 31. This has the function of preventing the occurrence of the phenomenon, preventing the reverse rotation of the rotary ring 31, and preventing the idle operation phenomenon that does not shift from the open state to the closed state.

Next, both the second and third embodiments show modifications of the operation unit B, and the other structure including the drainage unit A is the same as that of the above-described embodiment. Description is omitted.

The second embodiment is shown in FIG.
The operation unit B includes a manual button 3, an extension shaft 3a extending downward from the manual button 3, a motor 15, a motor shaft 15a connected to the motor 15, and a gear driving member 16 attached to the motor shaft 15a. And a motor operation case 17 for accommodating them, and the motor operation case 17
And a fixing case 18 for fixing to zero. The return auxiliary ammunition 10 is inserted into the lowermost part of the motor operation case 17, the extension shaft 3 a is positioned on the ammunition 10, and the motor is inserted through an opening (not shown) in the side surface of the motor operation case 17. The shaft 15a is inserted inside, and the gear drive member 16 is attached and fixed to the end thereof. The motor 15 is
A moisture-proof case (not shown) is provided as a moisture-proof measure, and is fixed to the motor operation case 17 with screws or the like.

Next, manual remote control of the drainage device of the second embodiment assembled as described above will be described. The concave and convex portions of the gear driving member 16 attached to the motor shaft 15a are assembled at positions where they do not mesh with the concave and convex portions of the extension shaft 3a, and operate at this position as the origin. When the extension shaft 3a directly pushes down the inner wire w1, raises and closes the stopper in the same manner as in the above embodiment, and pushes the manual button 3 again, the stopper 2 is lowered and closed.

In the case of electric remote control, the switch 60 of the operation panel 600 is operated in the same manner as in the above embodiment.
When 1 is pressed, the motor 15 is energized, the motor shaft 15a rotates, and the concave and convex portions of the gear driving member 16 and the concave and convex portions of the extension shaft 3a engage to push down the extension shaft 3a, thereby supporting the inner wire w1. The shaft 11 is pushed up, the thrust lock mechanism 1 is operated, the motor 15 stops rotating, and the open state is maintained. Then, when the switch 602 is pressed again,
Since the uneven portion of the gear drive member 16 meshes with the uneven portion of the extension shaft 3a to push down the inner wire w1, the thrust lock mechanism 1 is released, and at the same time the gear drive member 16 and the extension shaft 3a do not mesh with each other. 41, each member returns to the original position by the urging force of the return auxiliary ammunition 10, and is closed. In addition, in the open state where the rotation of the motor 15 is stopped, the gear drive member 16 is returned to the original ascending position by the urging force of the return auxiliary ammunition 10, so that the manual button 3 is operated after the electric operation. But it can be opened.

Next, a third embodiment shown in FIG. 4B will be described. The operation unit B includes a manual button 3 provided with cutouts 3b, 3b on side surfaces, a motor 15, a crankshaft 19 directly connected to the motor 15, a manual button 3, and a crankshaft 1.
9, a motor-operated case 22 for accommodating them, and a motor-operated case 22
It is composed of a fixing case 23 for fixing to 00. At the lowermost portion in the motor operation case 22, the return auxiliary ammunition 10 is arranged, the dish-shaped member 20 is placed on the return auxiliary ammunition 10, and the crankshaft 19 is passed through the side of the motor operation case 22. Hole 19a is provided, and the crankshaft 19 is directly connected to the motor 15 through the opening hole 19a. After the motor operation case 22 is attached to the tank body 200 in the same manner as in the above-described embodiment, the manual button 3 is attached to the operation section B. The connection of the release wire W to the motor operation case 22 and the connection of the drainage section A are performed in the same manner as in the above-described embodiment. Motor 1
5 is attached to the motor operation case 17 after being directly connected to the crankshaft 19, and the moisture-proof measures and the attachment method are the same as those of the above-described embodiment.

The operation of the drainage device of the third embodiment assembled as described above will be briefly described.
When the switch 601 on the operation panel 600 is pressed, the motor 1
5, the crankshaft 19 rotates and the dish-shaped member 2
0, and open the stopper according to the same principle as described above.
5 rotates and stops. The manual button 3 is lowered by its own weight as the dish-shaped member 20 is lowered. When the switch 602 is pressed again, the crankshaft 19 rotates again to push down the dish-shaped member 20 and release the thrust lock mechanism 1 of the drainage section A,
Each member returns to the original position by the urging force of the return ammunition 41 and the auxiliary return ammunition 10, and is closed. Further, in the manual operation, the dish-shaped member 20 is pushed down by directly pressing the manual button 3, and the plug can be alternately closed and opened by the function of the thrust lock mechanism 1.

In the second and third embodiments, similarly to the first embodiment, the manual button 3 is provided with a magnet 400 so that the user can clearly identify the position of the stopper, as in the first embodiment. A member 500 that reacts with the magnet 400 and sends a signal to a drain cock control device (not shown) is provided in the operation cases 17 and 22 to prevent malfunction of the drain cock.

Next, a fourth embodiment will be described. In this embodiment, in addition to the first embodiment, the engaged teeth 311 of the rotary ring 31 are connected to the saw-toothed locking teeth 61. It is formed in the shape of a convex curved surface (311a) that comes into contact.

As described above, the engaged teeth 31 of the rotating ring 31
1 is formed into a convex curved shape, so that the engaged teeth 31
The contact force between the tooth 1 and the serrated locking teeth 61 on the inner surface of the guide cylinder K is significantly reduced by line contact as compared with the first embodiment, and the engaged teeth 311 of the rotating ring 31 and the serrated teeth thereof are formed. Locking teeth 61
In order to prevent the occurrence of a surface tension phenomenon in which the engaged tooth (rotating ring) 311 is lifted in the reverse rotation direction between the above-mentioned and the above-mentioned case, it becomes more preferable.

Further, in the fifth embodiment, in addition to the fourth embodiment, the engaged teeth 311 of the rotating ring 31 have tooth lengths of which both ends are open to the engaged teeth 311 of the rotating ring 31. An example is shown in which one or a plurality of grooves 311b extending in the direction and / or the tooth width direction are recessed. In this embodiment, since the engaged teeth 311 of the rotating ring 31 stop contacting the saw-toothed engaging teeth 61 with the line contact and the grooves 311b are provided, the transition from the open state to the closed state is performed. Even if the rotatable ring 31 is freely rotatable in the initial stage, air enters through the groove, which is effective in preventing the occurrence of the surface tension phenomenon.

Although not shown in the embodiment, in addition to the first embodiment, the engaged teeth 31
1 may be formed into a shape that makes point contact with the serrated locking teeth 61, for example, a spherical shape, and the engaged teeth 311 may be formed in the tooth length direction and / or the tooth width direction. A groove may be formed to cope with the problem.

Next, a sixth embodiment will be described. This embodiment is not aimed at eliminating the surface tension phenomenon as in the above-described embodiment, but is intended for long-term use. An example is shown in which even if water scale or the like accumulates on the engaging teeth 211 and the serrated locking teeth 61 on the inner surface of the guide cylinder K, malfunction does not occur. The engaging teeth 311 have a convex curved surface (line contact) or a spherical shape (point contact) as in the fourth embodiment.

The reason why the engaged teeth 311 of the rotating ring 31 are formed into a convex curved surface or a spherical shape is that the engaging teeth 211 of the fixed ring 21 and the serrated locking teeth 61 on the inner surface of the guide cylinder K are lined. Engagement by contact reduces frictional resistance and allows the rotating ring 31
The purpose is to smoothly rotate the engaged tooth 311 of FIG.

The seventh embodiment will be further described. In this embodiment, the thrust lock mechanism is of a compact type compared to the first to sixth embodiments (Japanese Patent Laid-Open Publication No. 11-293334). The thrust lock mechanism 1 includes a support shaft 11 of the stopper 2 that is vertically movably guided by the guide cylinder K, and a rotating ring rotatably provided on the support shaft 11 and having engaged teeth 311 and 311 on both upper and lower surfaces. 31, a support shaft return spring 41 for urging the support shaft 11 downward, an engagement tooth 211 engraved on the top of the guide tube K, and an inner peripheral surface of the guide tube K And the guide cylinder K is provided with the drainage fitting 1
00 is locked so as to be removable from above.

The rotating ring 31 is provided on a support shaft 2.
The engagement teeth 311 and 311 that engage with the engagement teeth 211 and the engagement teeth 61 are coaxially and rotatably inserted between the flange portions 112 and 112, and are formed on upper and lower surfaces. The engaged teeth 311, 311 are for engagement teeth on the upper side and serrated locking teeth on the lower side. The engagement teeth 211 are formed by directly engraving a saw-tooth shape on the top of the guide cylinder K. The four locking teeth 61 are formed on the side wall of the guide cylinder K at intervals of 90 degrees from each other, and the upper ends of the locking teeth 61 are formed by saw-toothed portions. Same as the form. The engaged teeth 311 and 311 are engaged with the engaging teeth 211 on the upper side, and have the sawtooth-shaped locking teeth 6 on the lower side.
1. The above-mentioned engaging teeth 311
And the locking teeth 61 are arranged to face each other so as to face each other. A guide groove 51 is formed between the locking teeth 211 and 211 so that the engaged tooth 311 of the rotating ring 31 is fitted and guided, and the length of the guide groove 51 is at least supported. The length of the shaft 11 can be lowered so that the stopper 2 can be brought into close contact with the drainage fitting 100. The return bullet 41 is interposed between the upper flange 112 and the top.

The guide tube K is provided with an annular locking recess projecting from the drainage fitting 100 and having a locking portion 102a having a C-shape in a plan view at the tip thereof and being removably locked into the locking hole 102b of the bracket 102. K1 is provided around the middle of the outer peripheral surface. Each time the plunger at the other end of the release wire W screwed to the lower end of the guide cylinder K pushes the manual button, a concave portion (not shown) formed in the lower end of the support shaft 11. ) The bottom is pushed up, and the stopper 2 rises to open.

In this embodiment, as described above, the guide cylinder K
The drain groove 611 communicates with the serrated locking teeth 61 formed on the inner surface.

The drain groove 611 is formed at the lower end of each of the sawtooth-shaped locking teeth 61 at a height up to the bottom of the guide cylinder K in the same manner as described above. It is free to form.

FIG. 9 shows the operating state of the thrust lock mechanism, (see the solid line) shows the closed state,
One engaged tooth 311 is guided by the guide groove 51 of the guide cylinder K and is in a lowered state. In this state, when the manual button of the operation unit is pushed and pushed against the resilience of the return bullet 41, the support shaft 11 is pushed up by the release wire (in detail, the inner wire), and the upper side of the rotating ring 31 is pushed. The engaged tooth 311 is rotated while engaging with the sawtooth-shaped engaging tooth 211. When the pressing force is stopped, the rotating ring 31 is stopped.
The engaged tooth 311 on the lower side is engaged with the locking tooth 61 and is rotated to be in the open state. When the operation portion is pushed again, the engaged tooth 311 on the upper side of the rotating ring 31 is engaged with the adjacent toothed portion of the toothed tooth 211 and rotated. When the pressing force is stopped, the rotating ring 31 is stopped.
The engaged tooth 311 on the lower side is engaged with the locking tooth 61 and is rotated, and the engaged tooth 311 is guided by the guide groove 51 to move down to a closed state.

The drain groove 611 is used for draining (dropping) the water without stopping the serrated locking teeth 61 even if the water enters the guide tube K in a long-term use. Teeth 61 ...
The amount of water stagnating on the rotating ring 31 is suppressed to a small extent, and the engaged teeth 3 on the lower surface of the rotating ring 31 even if a free rotatable state occurs in the rotating ring 31 at the initial stage of transition from the open state to the closed state.
The occurrence of a surface tension phenomenon between the lock ring 11 and the locking teeth 61 inside the guide cylinder K is prevented, the reverse rotation of the rotating ring 31 is prevented, and an idle operation phenomenon that does not shift from the open state to the closed state is prevented. To prevent.

Of course, the lower engaged tooth 311 of the seventh embodiment may be formed into a convex curved surface or a spherical shape as in the fourth embodiment, or may be formed into a lower surface as in the fifth embodiment. The engaged teeth 311 and 311 on the upper and lower sides are formed without grooves, as in the sixth embodiment.
Can be freely formed into a convex curved surface shape or a spherical shape. The operation in this case is the same as that of each of the above-described embodiments, and the description of the operation will be omitted.

Further, a simple operation unit is provided in which an inner wire is connected to a manual button slidable in the operation tube, and the opening and closing of the opening and closing are performed by an artificial pressing of the manual button via a thrust lock mechanism. The present invention also includes embodiments that are performed alternately.

[0050]

As described above, according to the present invention, the drainage grooves are communicated with the locking teeth formed on the inner surface of the guide cylinder, and the drainage function of the drainage grooves allows the engagement between the locking teeth and the engaged teeth of the rotating ring. Thrust locks for remote-controlled drainage devices that use manual remote control or electric remote control, or both, to prevent reverse rotation of the rotating ring due to surface tension phenomena and to reliably prevent idle operation phenomena Mechanism. Therefore, since the transition from the open state to the closed state is reliably performed, even if the open / closed state is controlled in a kitchen or a dining room where the open / closed state cannot be visually checked, the empty operation phenomenon may occur. Despite the open state, the water supply and hot water supply from the hot water supply means linked to the operation of the energizing switch is performed, and if the household does not waste a large amount of water or the fuel of the water heater unless it is wasted, It is very safe to use a sensor means to detect the open state, as confirmation is not delayed and the hot water supply means does not cause abnormal heating as in the case of hot water filling outside the home by remote control. Attached separately to control to prevent wasteful water supply and hot water supply due to idle operation phenomenon, to make the rotating ring a metal, or to integrate the metal sleeve with the resin rotating ring Simple structure and can be dealt with inexpensive as compared with the method. In addition, if the engaged teeth of the rotating ring are formed in a line contact or a point contact with the engaging teeth of the inner surface of the guide cylinder and the engaging teeth of the fixed ring, the engaged teeth at the time of opening the plug are opened. The adhesion force of the engaging teeth to the locking teeth becomes extremely weak, and this is more effective in preventing the rotation of the rotating ring from being reversed due to the surface tension phenomenon. In addition, in the case where one or a plurality of grooves each having an open end are formed in the engaged teeth of the rotating ring, a plurality of grooves are formed in the rotating ring at the initial stage of transition from the open state to the closed state. Even if it occurs in a freely rotatable state, air enters from the groove of the engaged tooth between the engaged tooth of the rotating ring and the engaging tooth on the inner surface of the guide cylinder, and engages with the engaged tooth. Because it drains the water between the teeth
Even if there is a factor that causes the surface tension phenomenon, it is a protective measure for surely avoiding the surface tension phenomenon. Further, a thrust in which the engaged teeth of the rotating ring are formed into a line contact (for example, a convex curved surface shape) or a point contact (for example, a spherical shape) with the locking teeth on the inner surface of the guide cylinder and the engaging teeth of the fixed ring. In the lock mechanism, the scale is similarly slid against small scales that adhere over a long period of time with little frictional resistance, and does not hinder the smooth rotation of the rotating ring. It is possible to reliably perform alternate continuous up and down movement to lock at one end of the movement path and then release this lock, and to make it possible by devising the shape of the engaged teeth in the rotating ring, so that costs are also reduced. It is cheap.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal sectional view showing a use state of a drain plug having a built-in thrust lock mechanism according to a first embodiment.

FIG. 2 is a longitudinal sectional view of a main part.

FIG. 3 is an exploded view of the engaged teeth of the rotating ring, the engaging teeth of the fixed ring, and the locking teeth on the inner surface of the guide cylinder, showing the operating state of the thrust lock mechanism.

FIGS. 4A and 4B are longitudinal sectional views illustrating an operation unit according to the second and third embodiments, wherein FIG. 4A illustrates the second embodiment, and FIG. 4B illustrates the third embodiment; .

FIG. 5 is an exploded view showing a relationship between engaged teeth of a rotating ring and locking teeth of a guide cylinder, showing a thrust lock mechanism according to a fourth embodiment, partially enlarged.

FIG. 6 is an enlarged sectional view taken along line (6)-(6) of FIG.
An embodiment will be described.

FIG. 7 is an exploded view showing a relationship between engaged teeth of a rotating ring and locking teeth of a guide cylinder, showing a thrust lock mechanism according to a sixth embodiment, partially enlarged.

FIG. 8 is a vertical sectional view of a drain plug according to a seventh embodiment.

FIG. 9 is a development view of engaged teeth, engaging teeth, and locking teeth of the rotating ring.

[Description of Signs] 1: Thrust lock mechanism W: Release wire 200: Tank body K: Guide cylinder 61: Locking tooth 31: Rotating ring 311: Engaged tooth 21: Fixed ring 211: Engaging tooth 611: Drainage groove 311b: Groove (groove of engaged tooth)

Claims (4)

[Claims] 1. A thrust for opening / closing a drain plug provided on a bath body such as a bathtub or a basin by transmitting a driving force via a release wire by manual remote control or electric remote control, or remote control by both. In the lock mechanism,
A thrust lock mechanism, wherein a drain groove communicates with a locking tooth formed on an inner surface of the guide cylinder. 2. The method according to claim 1, wherein the engaged teeth of the rotating ring are formed in a line contact or a point contact with the engaging teeth on the inner surface of the guide cylinder and the engaging teeth on the fixed ring. Item 3. The thrust lock mechanism according to Item 1. 3. The thrust lock mechanism according to claim 1, wherein one or a plurality of grooves having both ends opened are recessed in the engaged teeth of the rotating ring. 4. A thrust for opening and closing a drain plug provided on a bath body such as a bathtub or a basin by transmitting a driving force through a release wire by manual remote control or electric remote control, or both remote control. In the lock mechanism,
A thrust lock mechanism, wherein the engaged teeth of the rotating ring are formed in a line contact or point contact with the locking teeth on the inner surface of the guide cylinder and the engaging teeth of the fixed ring.