JP6682080B2 - Remote operated drain plug device - Google Patents

Description

  The present invention relates to a remote-operated drain plug device for remotely operating a valve body that opens and closes a drain port formed on the bottom surface of a bath such as a wash bowl, a sink, and a bath.

  Patent Document 1 describes a remote-operated drain plug device that operates a valve element manually or electrically to open and close a drain port formed at the bottom of a tank body.

  The remote-operated drain plug device includes a manual operation unit and an electric drive unit, and the electric drive unit includes a motor as a drive unit, a power conversion unit that converts rotational movement of the motor into vertical movement, and The power transmission unit is configured to transmit the vertical movement converted by the power conversion unit to the manual operation unit.

  The manual operation part raises the valve body through a release connected to the manual operation shaft based on a push operation of a manual operation button, and holds the raised state of the valve body by a thrust lock mechanism. When lowering the valve element, the manual operation button is pushed again to release the holding by the thrust lock mechanism via the release.

  When operating the valve body by electric operation, an electric signal is sent to the electric drive unit to rotate the motor, and the rotational movement of the motor is converted by the power conversion unit to lower the power transmission unit. The power transmission unit pushes down the driven member arranged on the manually operated shaft as it descends, raises the valve body through the release, and holds the raised state of the valve body by the thrust lock mechanism. The power transmission unit automatically returns to its original position by the rotation of the motor after pushing down the driven member. When lowering the valve body, the power transmission unit again pushes down the driven member, and the holding by the thrust lock mechanism is released. Also in this case, the power transmission unit automatically returns to the original position by the rotation of the motor after pushing down the driven member.

  That is, in the above-mentioned remote-operated drain plug device, since the power transmission unit pushes down the driven member and returns to the original position, it is possible to perform a manual operation even after the electric operation and also to perform the electric drive. Even if a part breaks down, the drain port can be opened and closed manually.

  As described above, the remote control type drain plug device including the drive unit performs the lifting operation of the valve body by converting the rotational movement of the motor into the forward / backward movement in the direction of pushing down the release. As for the structure for the conversion, the remote operated drain plug device described in Patent Document 2 is known.

  In the remote-operated drain plug device described in Patent Document 2, the worm wheel rotates in response to the rotation of the motor, and a screw cylinder is screwed into a screw hole opened at the center of the worm wheel. The screw cylinder has a vertical groove on its outer surface, and the vertical groove is guided by the guide protrusions so that it cannot be rotated. Therefore, when the worm wheel rotates, the screw tube moves back and forth along the screw inside the worm wheel. The position of the screw cylinder is detected by the sensor, and when the sensor detects that the screw cylinder has risen or descended to a preset position, an instruction to stop the operation of the motor or to reverse the rotation is issued. To do.

Patent No. 3882165 Patent No. 4766807

The remote-operated drain plug device described in Patent Document 2 converts the rotation of the motor into a movement for advancing and retracting the screw cylinder by the female screw formed on the worm wheel and the male screw formed on the screw cylinder. It has a structure.
Here, in the remote operated drain plug device described in Patent Document 2, when dirt such as sand or dust adheres between the worm wheel and the screw cylinder, the member may be damaged by the rotation of the motor. . More specifically, when dirt or the like adheres between the worm wheel and the screw cylinder, the screw cylinder rotates in conjunction with the worm wheel, so-called revolving occurs. In this case, the screw cylinder, which should not be able to rotate originally, tries to rotate by force, and there is a risk of damage to the guide unit that suppresses the rotation of the screw cylinder, the member of the device such as the screw cylinder, and the like. There is. Further, since the screw cylinder is not rotatable, when the sand or dust is caught, the motor is overloaded and heat is generated, which may damage the screw cylinder.
In addition, if the sensor fails, the motor may continue to rotate in the same direction, and the screw cylinder may move up or down until the worm wheel is located at the end of the screw cylinder. At this time, the screw cylinder, which cannot be further raised or lowered, is rotated in conjunction with the worm wheel, which may damage the member.

  Therefore, the present invention is invented in view of the above problems, in a remote control type drain plug having a drive unit that rotates based on an electric signal, and a motion transmission unit that moves forward and backward in response to the rotation of the drive unit, It is an object of the present invention to provide a remote control type drain plug that does not cause damage to members.

The present invention according to claim 1 is a drainage port provided at the bottom of the tank body,
A valve body that opens and closes the drainage port by lifting motion,
In a remote-operated drain plug device consisting of an operating unit that raises and lowers the valve body,
The operation unit is a drive unit that rotates the screw cylinder based on an electric signal,
It is equipped with a motion transmission unit that converts the rotation of the screw cylinder into an advancing / retreating motion and raises / lowers the valve body ,
The motion transmission part has a damage prevention mechanism,
The breakage prevention mechanism, the rotation of the thread tube is not converted into forward and backward of the motion transmission unit, operated when the motion-transmitting unit is to rotate, remote controlled drainage, characterized in that to prevent breakage of the member It is a stopper device.

According to the present invention of claim 2, the damage prevention mechanism is
The remote-operated drain plug device according to claim 1, wherein the motion transmitting unit is prevented from rotating.

According to the present invention of claim 3, the damage preventing mechanism is
A cam portion that is screwed with the screw cylinder and is rotatably arranged with respect to the motion transmitting portion;
3. The remote-operated drain plug device according to claim 2, wherein the remote-operated drain plug device comprises an engaging portion that is biased by the elastic body toward the cam portion to prevent the cam portion from rotating.

According to the first aspect of the present invention, since the remote-operated drain plug device is provided with the damage prevention mechanism, it is possible to prevent the members of the device from being damaged due to sand jamming, clogging of dust, or sensor failure. The "damage prevention mechanism for preventing damage to members" does not only mean a mechanism for preventing damage to all members, but includes a mechanism for preventing damage to specific members. For example, a mechanism that intentionally damages a specific member in order to prevent damage to the drive unit may be used.
According to the second aspect of the present invention, since the rotation of the motion transmitting portion, which is the cause of the damage, is prevented, the damage of the member can be prevented.
According to the third aspect of the present invention, when the stress of a predetermined value or more is applied, the cam portion does not rotate, and the entire motion transmitting portion does not rotate. Therefore, it is possible to prevent the members from being damaged due to the rotation of the motion transmitting portion.

It is a sectional view showing a construction state of a remote control type drain plug device. It is a reference drawing showing composition of a remote control type drain plug device. It is sectional drawing which shows an operation part. FIG. 4 is a sectional view taken along line A-A ′ of FIG. 3. It is an exploded perspective view showing the member composition of an electric operating part. It is sectional drawing which shows the state which the valve body rose by operation of a manual operation part. FIG. 6 is a cross-sectional view showing a state in which the electrically operated portion is actuated to raise the valve body. It is sectional drawing which shows the operating state of a release mechanism. It is sectional drawing which shows the operation state of a damage prevention mechanism. It is sectional drawing which shows 2nd embodiment. FIG. 11 is an enlarged view of a cross section of the output shaft and the screw cylinder taken along line AA ′ of FIG. 10, (a) a sectional view showing a non-operating state of the damage prevention mechanism, and (b) a sectional view showing an operating state of the damage prevention mechanism. Is. It is sectional drawing which shows 3rd embodiment.

  The remote operated drain plug device of the present invention will be described below with reference to the drawings. The following description is for facilitating the understanding of the embodiments, and the invention is not limited to the understanding. In addition, in the following embodiments, unless otherwise specified, the positional relationship between the upper, lower, left, and right members will be described based on the construction state shown in FIG. 1.

  As shown in FIGS. 1 and 2, the remote-operated drain plug device according to the present embodiment is attached to a tank body B, and includes a drain plug 1, a release wire 3, a valve body 9, and an operating portion 10. There is.

  The tank body B is a box-shaped bathtub having an upper opening, and is arranged adjacent to the washing place in the bathroom. Further, the tank body B has an opening on the bottom surface and the edge portion thereof, and the drain plug 1 and the operating portion 10 are attached to the opening, respectively.

  The drain plug 1 is a substantially cylindrical member having a through hole in the axial direction, a male screw is threaded on the outer periphery, and a flange portion is formed at the upper end toward the outside. In addition, the drain plug 1 has a wire receiver 2 fitted to a convex portion formed on the inner circumference thereof, and a valve shaft 6 is held by the wire receiver 2. When the drain plug 1 is attached to the bottom surface of the tank B, the opening on the upper end side of the through hole formed in the axial direction functions as a drain port.

  The release wire 3 is composed of an outer tube 4 and an inner wire 5, and has one end connected to the valve shaft 6 and the other end connected to the thrust lock mechanism 37 of the operation unit 10. The operated operation is transmitted to the valve shaft 6. The outer tube 4 is a resin-made tube body having lateral flexibility, and an inner wire 5 which is a metal twisted wire having lateral flexibility is slidably arranged inside. . The release wire 3 has a return spring at the end of the thrust lock mechanism 37 that constantly urges the inner wire 5 toward the thrust lock mechanism 37.

The valve shaft 6 is a tubular body composed of an outer cylinder and an inner cylinder. An outer tube 4 is connected to the outer cylinder, and an inner wire 5 is connected to the inner cylinder. The inner wire 5 slides inside the outer tube. The inner cylinder is formed so as to project from the outer cylinder by moving. Further, the valve shaft 6 has a shock absorber inside, and prevents damage to the valve shaft 6, the release wire 3, and the wire receiver 2 when the valve body 9 is shocked when the valve body 9 is lifted.
Here, the outer cylinder is held by the wire receiver 2, and the valve body 9 is fitted to the upper end of the inner cylinder. Therefore, as the inner wire 5 slides, the inner cylinder projects from the outer cylinder, so that the valve body 9 can be moved up and down.

  A packing is fitted on the outer peripheral surface of the valve body 9, and is a lid member that closes the drainage port when the packing contacts the drain plug 1 in the lowered state. Further, the valve body 9 is fitted with the front end of the inner cylinder on the back surface.

  As shown in FIGS. 3 to 5, the operation unit 10 is composed of a first operation unit 14, a second operation unit 31, and a thrust lock mechanism 37, and the release wire 3 is connected to the end of the thrust lock mechanism 37. Has been done. Further, some members of the first operating portion 14 and the second operating portion 31 are housed inside the casing 12 and fixed to the edge portion of the tank body B by the flange 11, and the thrust lock mechanism 37 is It is connected to the lower end of the casing 12 by a C-shaped ring. The operation unit 10 also includes a release mechanism that releases the engagement between the motion transmission unit 21 and the driven unit 35, which will be described later.

  The flange 11 is cylindrical, has a flange at the upper end, is attached to an opening formed at the edge of the tank B, and has a casing 12 connected to the lower end.

  The casing 12 accommodates a part of the members of the manual operation part 32 and the electric operation part 15, is arranged on the back surface of the edge of the tank body B, and has a substantially fan-shaped storage part 13 on its back surface.

  The first operation unit 14 is an electric operation unit 15 that raises and lowers the valve body 9 based on an electric signal, and includes an electric operation button 16, a drive unit 18, a screw cylinder 20, a motion transmission unit 21, a knob unit 24, The motion transmission section 21 has a damage prevention mechanism.

As shown in FIG. 2, the electric operation button 16 is a button member that is arranged outside a bathroom such as a dressing room and transmits an electric signal to the drive unit 18, and controls the operation of the first operation unit 14. It is attached to the base 17.
The drive unit 18 is a motor that is driven based on an electric signal transmitted by operating the electric operation button 16, and is arranged in the lower right portion of the casing 12 in FIG. 3, and is powered by a power supply (not shown) via a cord. ), And the base 17. The board 17 controls the driving of the driving unit 18, and changes the rotation direction of the driving unit 18 based on the position information of the motion transmitting unit 21 detected by the sensor 26. The driving unit 18 operates for a certain time or longer. In this case, control such as stopping driving of the drive unit 18 is performed. The output shaft 19 of the drive unit 18 has a hexagonal prism shape and is inserted into the lower end of the screw cylinder 20.
The screw cylinder 20 has a cylindrical shape in which a male screw is formed on the outer circumference, has a hole having substantially the same shape as the outer diameter of the output shaft 19 at the lower end, and the output shaft 19 is inserted therein.
One end of the motion transmitting portion 21 is screwed into the screw cylinder 20, and an engaging portion 22 is formed at the other end via a support portion 23. The engagement portion 22 is substantially C-shaped in a plan view and is engaged with the driven portion 35. As shown in FIG. 3, the engagement portion 22 is arranged at a position where it does not interfere with the driven portion 35 when the drive portion 18 is not driven. A damage prevention mechanism is arranged inside the support portion 23, and the support portion 23 is extended toward a manual operation shaft 34 of the manual operation portion 32 so as to bridge the screw cylinder 20 and a manual operation portion 32 described later. Since the end portion of the operation transmitting portion 21 on the screw cylinder 20 side is covered by the knob portion 24, the operation transmitting portion 21 can operate only in the vertical direction along the slit 25 of the knob portion 24, and its position information is obtained by the sensor. Detected by 26. The knob portion 24 is cylindrical and has an upper end that can be held and a slit 25 formed on the side surface. The knob portion 24 is arranged so as to cover the end portion of the motion transmitting portion 21 on the screw cylinder 20 side from above and the supporting portion 23 to project from the slit 25.
The sensor 26 is arranged on the right side of the casing 12 in FIG. 3, detects the position information of the motion transmitting unit 21, and when it detects that the motion transmitting unit 21 has moved up or down to a preset position, , And sends the information to the board 17 to control the driving of the driving unit 18.
As shown in FIG. 4, the damage prevention mechanism attaches to the cam portion 28 a nut-shaped cam portion 28 having a substantially hexagonal shape in plan view, a locking portion 29 that comes into contact with the side surface of the cam portion 28, and a locking portion 29. It is composed of a spring 30 that acts as an elastic body. A female screw is formed on the inner periphery of the cam portion 28 and is screwed into the screw cylinder 20. Although the cam portion 28 is rotatably arranged inside the motion transmitting portion 21, the locking portion 29 urged by the spring 30 is in contact with the side surface of the cam portion 28, so that the rotation is suppressed.

  The second operation unit 31 is a manual operation unit 32 that raises and lowers the valve body 9 based on a manual pushing operation, and includes a manual operation button 33, a manual operation shaft 34, and a driven unit 35.

The manual operation button 33 is a button member having a substantially circular shape in plan view that is directly pushed by a user and moves up and down, and its upper surface is arranged at a position flush with the upper surface of the flange 11.
The manual operation shaft 34 is fitted on the back surface of the manual operation button 33, and extends to a position where the lower end abuts the lock shaft 38 of the thrust lock mechanism 37.
The driven portion 35 has a tubular shape having a flange portion 36, and is formed in the middle of the manual operation shaft 34. Further, the driven portion 35 is arranged in the engaging portion 22 of the motion transmitting portion 21.

  The thrust lock mechanism 37 includes a rotary gear and a fixed gear inside, and when the lock shaft 38 is pushed, the inner wire 5 connected to the lower end is advanced and retracted to raise the valve body 9, and the rotary gear and the fixed gear are also provided. Is a mechanism for holding the valve body 9 in the raised state by meshing. When the lock shaft 38 is pushed again, the engagement of the rotary gear with the fixed gear is released, and the holding of the valve body 9 in the raised state is released. Therefore, the thrust lock mechanism 37 can switch the valve body 9 between the raised state and the lowered state each time the lock shaft 38 is pushed.

  The release mechanism is formed by the slit 25 formed on the side surface of the knob portion 24 and the housing portion 13 formed in the casing 12. By rotating the knob portion 24, the motion transmitting portion 21 and the driven portion 35 are provided. The engagement with can be released.

  The operation of the remote operated drain plug device of the present invention will be described below.

First, the operation of the manual operation unit 32 will be described.
When the push operation is applied to the manual operation button 33 from the state shown in FIG. 3, the manual operation button 33 and the manual operation shaft 34 are lowered and the lock shaft 38 of the thrust lock mechanism 37 is pushed down, as shown in FIG. When the lock shaft 38 is pushed down, the inner wire 5 slides inside the outer tube 4 toward the valve body 9 side to raise the valve body 9. At this time, the thrust lock mechanism 37 holds the valve body 9 in the raised state and the manual operation button 33, the manual operation shaft 34, and the lock shaft 38 in the lowered state by the engagement of the rotary gear and the fixed gear. Therefore, the user can also determine the state of the valve body 9 by visually observing the manual operation button 33.
When the user again pushes the manual operation button 33, the lock shaft 38 is pushed down again to release the hold of the valve body 9 in the raised state, and the weight of the valve body 9 and the return spring cause the valve body 9 to move. To descend.

Next, the operation of the electric operating unit 15 will be described.
As shown in FIG. 7, when the electric operation button 16 is operated, the drive unit 18 operates based on the electric signal, and the output shaft 19 and the screw cylinder 20 into which the output shaft 19 is inserted rotate. At this time, the cam portion 28 disposed inside the motion transmitting portion 21 is screwed with the screw cylinder 20, but the slit 25 of the knob portion 24 prevents the motion transmitting portion 21 from rotating. The rotation of 20 is converted into the forward / backward movement of the motion transmission unit 21. Therefore, the motion transmitting portion 21 is lowered by the rotation of the screw cylinder 20, and the engaging portion 22 pushes down the driven portion 35 to push down the manual operating shaft 34, the manual operating button 33, and the lock shaft 38 of the thrust lock mechanism 37. . Then, when the lock shaft 38 is pushed down, the inner wire 5 slides inside the outer tube 4 toward the valve element 9 side to raise the valve element 9, and the thrust lock mechanism 37 causes the valve element 9 to move upward. Retained.
It should be noted that when the motion transmitting unit 21 descends to an appropriate position, the sensor 26 detects the position information of the motion transmitting unit 21. At this time, the drive unit 18 performs reverse rotation based on the position information, and returns the motion transmission unit 21 to the original position shown in FIG. On the other hand, the thrust lock mechanism 37 holds the valve body 9 in the raised state and the manual operation button 33, the manual operation shaft 34, and the lock shaft 38 in the lowered state, so that the user can visually check the manual operation button 33. It is also possible to determine the state of the valve body 9.
When the user operates the electric operation button again, the drive unit 18 rotates again, and the lock shaft 38 is pushed down again to release the holding of the lifted state of the valve body 9, and the weight of the valve body 9 and the return spring cause the valve to move. The body 9 descends. In addition, the motion transmitting unit 21 returns to the original position by the drive unit 18 rotating in the reverse direction after descending to an appropriate position.

  As described above, since the electric drive unit 18 has a structure in which the operation transmission unit 21 returns to the original position shown in FIG. 3 each time the operation is performed, the electric operation unit 15 is operated after the manual operation unit 32 is operated. It will be possible.

  On the other hand, when the electric drive unit 18 stops operating while the motion transmission unit 21 is lowered due to the inclusion of sand or dust or the failure of the sensor 26, the engagement unit 22 and the driven unit 35 interfere with each other. However, the driven portion 35 cannot be raised to a predetermined position, and the manual operation portion 32 cannot be operated. In this case, the manual operation unit 32 can be operated again by performing the following operation.

First, the apron of the tank body B (not shown) is removed, and the casing 12 is exposed in the bathroom.
Next, the knob portion 24 exposed from the upper surface of the casing 12 is gripped and rotated. At this time, since the opening position of the slit 25 is displaced in the circumferential direction in the knob portion 24 by the rotation, the motion transmitting portion 21 projecting from the slit 25 is interlocked with the rotation of the knob portion 24, as shown in FIG. Then, it is stored in the storage portion 13 formed on the back surface of the casing 12 and having a substantially triangular cross-section. As a result, the engagement between the motion transmitting portion 21 and the driven portion 35 is released.
As described above, in the state where the motion transmitting unit 21 is housed in the housing unit 13, the motion transmitting unit 21 and the driven unit 35 are disengaged, and the manual operating unit 32 and the electric operating unit 15 are not in operation. It becomes an interference state. Therefore, the driven portion 35 can be raised to a predetermined position, and the user can perform the lifting operation of the valve body 9 again by pressing the manual operation button 33.
When the cause of the failure such as sand biting is eliminated, the operation transmitting portion 21 and the driven portion 35 are engaged by rotating the knob portion 24 again, and the electric operating portion 15 is used as usual. You can

  Also, when sand or dust is caught between the male screw of the screw cylinder 20 and the female screw of the motion transmitting portion 21, or when the sensor 26 fails, the damage prevention mechanism operates. To do.

  When the sand or dust is caught, the rotation of the screw cylinder 20 is not converted into the forward / backward movement of the motion transmission unit 21, and the motion transmission unit 21 tries to rotate with the rotation of the screw cylinder 20. The so-called circumvention occurs. At this time, since the rotation of the motion transmitting portion 21 is restricted by the slit 25, stress is applied to the cam portion 28 in the rotation direction. Then, when the cam portion 28 tries to rotate, the cam portion 28 applies a stress to the locking portion 29 in the direction of contracting the spring 30. Then, when the stress exceeds the stress of the spring 30, the cam portion 28 presses the locking portion 29 toward the manual operation shaft 34 side, and the cam portion 28 idles as shown in FIG. 9. Therefore, the rotation of the screw cylinder 20 is not transmitted to the support portion 23 of the motion transmitting portion 21 or the manual operation shaft 34, and the damage of the motion transmitting portion 21 can be prevented. Incidentally, when the biting of sand, dust, etc. is released, the locking portion 29 again contacts the cam portion 28 due to the stress of the spring 30, and the motion transmitting portion 21 can move up and down along the slit 25. .

  When the sensor 26 has failed, even if the motion transmission section 21 rises or falls above a predetermined height, the position information of the motion transmission section 21 cannot be detected, and therefore the output shaft 19 has the same direction. Keep turning to. Then, when the motion transmitting portion 21 reaches the upper end or the lower end of the screw cylinder 20, it is impossible to further raise or lower, so that the screw cylinder 20 can be moved in the same manner as when the sand or dust is bitten. The rotation is not converted into the forward / backward movement of the motion transmitting unit 21, and the motion transmitting unit 21 tries to rotate. However, since the present invention includes the damage prevention mechanism, it is possible to prevent the damage of the member without the motion transmitting portion 21 rotating due to the cam portion 28 idling.

  If the cam portion 28 keeps idling due to the trapping of sand or dust or the like, and the sensor 26 or the like malfunctions, and the drive portion 18 continues to operate for a certain time or longer, the board 17 detects the abnormal operation and the drive portion is detected. The operation of 18 is forcibly stopped.

  In the above-described remote operated drain plug device of the present invention, the damage preventing mechanism prevents the motion transmitting portion 21 from rotating, and thus damage to the member can be prevented. Further, since the rotation of the motion transmitting unit 21 is prevented by the damage prevention mechanism, the load applied to the drive unit 18 is also reduced, and the damage due to heat generation of the drive unit 18 can be prevented.

  Further, in the above-described remote operated drain plug device of the present invention, even if the electric operating portion 15 fails in a state where the operation transmitting portion 21 is lowered and interferes with the operation of the driven portion 35, the operation is performed by the releasing mechanism. The engagement between the transmission portion 21 and the driven portion 35 can be released. Therefore, in the remote-operated drainage tap device having the first operation unit 14 and the second operation unit 31, even if the first operation unit 14 fails, the second operation unit is not disassembled and the second operation unit is not disassembled. The operation unit 31 can be made operable.

  Although the first embodiment of the present invention has been described above, the present invention is not limited to the shape of the first embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described first embodiment, the damage prevention mechanism is provided inside the motion transmitting portion 21, but the position where the mechanism is provided can be changed as appropriate, such as being provided inside the screw cylinder 20. In the embodiments described below, the same components as those in the first embodiment will be denoted by the same reference numerals as those in the first embodiment and the description thereof will be omitted unless otherwise specified.

  In the second embodiment shown in FIGS. 10 and 11, the damage prevention mechanism is composed of a hole formed at the lower end of the output shaft 19 and the screw cylinder 20. The output shaft 19 is made of a synthetic resin having elasticity, and as shown in FIG. 11A, a plurality of protrusions are formed on the outer circumference, and the hole formed at the lower end of the screw cylinder 20 is located outside the output shaft 19. It is formed slightly larger than the diameter. The movement of the damage prevention mechanism according to the second embodiment is as follows. Note that FIG. 11 is a reference view in which FIG. 10 is cut along A-A ′ and the output shaft 19 and the screw cylinder 20 are enlarged.

When sand, dust, or the like is caught between the screw cylinder 20 and the motion transmission unit 21, or when the sensor 26 fails, the motion transmission unit 21 causes the screw cylinder to move as in the first embodiment. With the rotation of 20, the so-called rotation, which tends to rotate, occurs. However, since the rotation of the motion transmitting section 21 is restricted by the slit 25, stress is applied in the rotational direction between the output shaft 19 and the screw cylinder 20. When the stress exceeds a predetermined value, as shown in FIG. 11 (b), the protrusion formed on the outer periphery of the output shaft 19 is deformed by the elasticity of the resin, and the protrusion is formed in the lower end of the screw cylinder 20. Spin idle. Therefore, the rotation of the screw cylinder 20 is not transmitted to the support portion 23 of the motion transmitting portion 21 or the manual operation shaft 34, and the damage of the motion transmitting portion 21 can be prevented.
Incidentally, when the biting of sand, dust, etc. is eliminated, the output shaft 19 and the hole formed at the lower end of the screw cylinder 20 are engaged again, and the screw cylinder 20 is rotated to move the motion transmitting portion. 21 can be moved up and down.

  Although the present invention is provided with a damage prevention mechanism to prevent damage to the members, the "member" does not mean all members. For example, the structure may be such that when the sand, dust, or the like is caught, the motion transmitting unit 21 is separated or damaged, so that the driving unit 18 is prevented from being damaged due to heat generation. That is, the drive unit 18 is the most expensive member out of the members that may be damaged. Therefore, by preventing the drive unit 18 from being damaged at a minimum, the cost for repair can be reduced. . In the third embodiment shown in FIG. 12, a part of the support portion 23 is formed thin so as to constitute a weak portion 40. In the third embodiment, when stress is applied to the motion transmitting portion 21 in the rotation direction, the stress concentrates on the fragile portion 40, so that the fragile portion 40 is damaged before the drive portion 18 is damaged. The drive unit 18 is prevented from being damaged.

  Further, in the first embodiment, the locking portion 29 is biased toward the cam portion 28 by the spring 30 as an elastic body, but an elastic body such as rubber may be used instead of the spring 30. .

  Further, in each of the above-described embodiments, the operation unit 10 is composed of the electric operation unit 14 and the manual operation unit 32, but the operation unit 10 may be composed of only the electric operation unit 14.

DESCRIPTION OF SYMBOLS 1 Drain plug 2 Wire receiving 3 Release wire 4 Outer tube 5 Inner wire 6 Valve shaft 9 Valve body 10 Operating part 11 Flange 12 Casing 13 Storage part 14 First operating part 15 Electric operating part 16 Electric operating button 17 Base 18 Driving part 19 Output Shaft 20 Screw Cylinder 21 Motion Transmission Part 22 Engaging Part 23 Supporting Part 24 Knob Part 25 Slit 26 Sensor 28 Cam Part 29 Locking Part 30 Spring 31 Second Operation Part 32 Manual Operation Part 33 Manual Operation Button 34 Manual Operation Shaft 35 Driven portion 36 Collar portion 37 Thrust lock mechanism 38 Lock shaft 40 Fragile portion B Tank body

Claims (3)

A drain outlet provided at the bottom of the tank body,
A valve body that opens and closes the drainage port by lifting motion,
In a remote-operated drain plug device consisting of an operating unit that raises and lowers the valve body,
The operation unit is a drive unit that rotates the screw cylinder based on an electric signal,
It is equipped with a motion transmission unit that converts the rotation of the screw cylinder into an advancing / retreating motion and raises / lowers the valve body ,
The motion transmission part has a damage prevention mechanism,
The breakage prevention mechanism, the rotation of the thread tube is not converted into forward and backward of the motion transmission unit, operated when the motion-transmitting unit is to rotate, remote controlled drainage, characterized in that to prevent breakage of the member Stopper device. The damage prevention mechanism is
The remote-operated drain plug device according to claim 1, wherein rotation of the motion transmission unit is prevented. The damage prevention mechanism is
A cam portion that is screwed with the screw cylinder and is rotatably arranged with respect to the motion transmitting portion;
The remote-operated drain plug device according to claim 2, wherein the remote-operated drain plug device is composed of a locking portion that is urged toward the cam portion by an elastic body to prevent the cam portion from rotating.

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