JP2020193515A - Drain plug device - Google Patents

Abstract

To provide a drain plug device capable of preventing a rotation part from falling out of an attachment cylinder part, increasing workability, and reducing a production cost.SOLUTION: A drain plug device 1 of this invention includes: a rotation part that is inserted through an attachment cylinder part 32; and a support projection that causes a plug lid 52 to move vertically by moving vertically with a rotation of the rotation part. The drain plug device 1 includes a rack part 44 that engages with a gear part 411c provided on an outer periphery of the rotation part and the rack part 44 is provided with a falling prevention part to which the rotation part is latched and which prevents the rotation part from falling out of the attachment cylinder part 32. Since the falling prevention part provided in the rack part 44 prevents the falling of the rotation part, it becomes unnecessary to particularly provide a separate member such as an outer fitting member for preventing the falling, thereby increasing workability regarding assembling the device or maintenance and reducing a production cost.SELECTED DRAWING: Figure 5

Description

The present invention relates to a drain plug device provided at a drain port of a tank body.

The drain plug device is provided with a plug lid provided corresponding to the drain port of the tank body (for example, a bathtub or a wash bowl), and the drain port is opened and closed by moving the plug lid up and down. ..

The drain plug device includes a pipe having a straight tubular flow path component that extends in the vertical direction and allows drainage that has passed through the drain port to flow, and is arranged in the flow path component to support the plug lid and move up and down. It is provided with a possible support shaft and a transmission member (for example, a wire) that transmits a driving force due to displacement of a predetermined operation unit (for example, an operation button) to the support shaft, and the support shaft and the support shaft and the above are operated by operating the operation unit. It is generally known that the open / closed state of the drain port is switched by moving the lid up and down.

Further, in recent years, the pipe is configured to include a mounting cylinder portion that branches from the flow path constituent portion, and a rotating portion formed with a support protrusion that indirectly supports the plug lid is formed on the tip surface. There has been proposed a drain plug device configured to move the plug lid up and down by inserting and installing it in the mounting cylinder portion and moving the support protrusion up and down with the rotation of the rotating part (for example). , Patent Document 1 etc.). The drain plug device described in this patent document is provided with a rack portion to which a transmission member is connected and a gear (pinion) that is meshed with the rack portion and fixed to a rotating portion. As the rack portion moves and the gears rotate with the movement, the support protrusions rotate and move up and down.

Japanese Unexamined Patent Publication No. 2018-3347

By the way, in the drain plug device described in the above patent document, an outer fitting member (for example, a C ring) fitted to the outer periphery of the rotating portion prevents the rotating portion from coming off from the mounting cylinder portion to the flow path constituent portion side. It is configured to prevent. However, in this configuration, the number of parts increases and the device becomes complicated, which may lead to a decrease in workability related to assembly and maintenance of the device and an increase in manufacturing cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the rotating portion from coming off from the mounting cylinder portion to the flow path constituent portion side, and to improve workability and manufacturing cost. The purpose is to provide a drain plug device capable of reducing the cost.

Hereinafter, each means suitable for solving the above object will be described in terms of terms. In addition, the action and effect peculiar to the corresponding means will be added as necessary.

Means 1. A lid that can move up and down to open and close the drain of the tank body,
It has a tubular flow path component through which drainage that has passed through the drainage port flows, and a tubular mounting tube that is provided so that its own internal space communicates with the internal space of the flow path component. And the piping
A rotatable rotating portion inserted into the mounting cylinder portion and
It is provided with a support protrusion that protrudes from the rotating portion and is arranged in the flow path constituent portion to directly or indirectly support the plug lid.
A drain plug device configured so that the plug lid moves up and down by moving the support protrusion up and down while rotating with the rotation of the rotating portion.
It has a rack portion that is meshed with a gear portion provided on the outer circumference of the rotating portion and can reciprocate along its own longitudinal direction.
The rack portion is a drain plug device, characterized in that the rotating portion is locked and provided with a retaining portion for preventing the rotating portion from coming off from the mounting cylinder portion to the flow path constituent portion side.

According to the above means 1, when the rotating portion and the support protrusion are configured to rotate due to the movement of the rack portion, the retaining portion provided on the rack portion causes the mounting cylinder portion to move to the flow path constituent portion side. It is possible to prevent the rotating portion of the above from coming off. Therefore, it is not necessary to provide a separate member such as an outer fitting member (for example, a C ring) to prevent it from coming off. Therefore, it is possible to reduce the number of parts and simplify the device, and as a result, it is possible to improve workability related to assembly and maintenance of the device and reduce the manufacturing cost.

The retaining portion can be realized by, for example, the configuration of the means 2 and the means 3 described below.

Means 2. The rotating portion has a groove portion extending along the circumferential direction.
The retaining portion is characterized in that it forms a ridge extending along the moving direction of the rack portion and is arranged in the groove portion so that the rotating portion is locked. The drain plug device according to the means 1.

According to the above means 2, the retaining portion can be realized by a relatively simple structure, and workability can be improved and manufacturing cost can be reduced more effectively.

Means 3. Means 1 characterized in that the retaining portion is formed by teeth of the rack portion that are meshed with the gear portion and can come into contact with the gear portion along the rotation axis direction of the rotating portion. The drain plug device described in.

According to the above means 3, the retaining portion is composed of the teeth of the rack portion that are meshed with the gear portion. Therefore, it is not necessary to provide a special portion for preventing the rack from coming off, and it is possible to more effectively reduce the manufacturing cost.

The retaining portion of the means 3 is, for example, a gear portion of a rotating portion made of a two-stage gear whose teeth are displaced along the rotation direction, or a gear portion of a rotating portion made of a double helical gear. It can be configured by the teeth of the rack portion configured to be meshed with.

Means 4. It has a tubular rack accommodating portion in which the rack portion is accommodated, and a gear accommodating portion in which the gear portion in the rotating portion is accommodated, and is mounted on the mounting cylinder portion or integrally with the mounting cylinder portion. Equipped with a gearbox part to be formed
The drain plug device according to any one of means 1 to 3, wherein the gearbox portion is composed of a single component.

According to the above means 4, the gearbox portion including the rack accommodating portion in which the rack portion is accommodated and the gear accommodating portion in which the gear portion of the rotating portion is accommodated is composed of a single component. That is, the gearbox portion is not formed by combining a plurality of parts, but is composed of one part. Therefore, the number of parts can be further reduced, workability can be improved, and manufacturing cost can be reduced more effectively.

When the gearbox portion and the mounting cylinder portion are integrally formed, the gearbox portion and the mounting cylinder portion are integrally formed of a single component.

Means 5. The rack housing portion has a tubular shape with an opening at the end.
The rack portion can be inserted from the opening into the rack accommodating portion.
With the gear portion of the rotating portion accommodated in the gear accommodating portion, the rotating portion was locked to the retaining portion by inserting the rack portion through the opening into the rack accommodating portion. The drain plug device according to means 4, wherein the drain plug device is configured to be in a state.

According to the above means 5, the rotating portion is locked to the retaining portion by inserting the rack portion through the opening of the rack accommodating portion into the rack accommodating portion while the gear portion is accommodated in the gear accommodating portion. It can be in a (hooked) state. Therefore, by simply inserting the rack portion into the rack accommodating portion without performing any special work such as attaching or arranging parts for preventing the rotating portion from coming off, the rotating portion can be pulled out by the retaining portion. Can be prevented. As a result, workability can be improved and manufacturing costs can be reduced even more effectively.

It is sectional drawing of the drain plug device. It is a perspective view of the drain plug device. It is a side view of the drain plug device. It is an enlarged sectional view of the drain plug device. It is a perspective view of the drain plug device in the state which the gearbox part is removed. It is an enlarged sectional view of the stopper lid drive mechanism. It is a perspective view of a rack part. FIG. 5 is a cross-sectional view taken along the line JJ of FIG. It is an exploded perspective view of the rotating part and the rack part in another embodiment. It is a perspective view of the rack part in another embodiment. It is an exploded perspective view of the rotating part and the rack part in another embodiment. It is a perspective view of the rack part in another embodiment.

Hereinafter, one embodiment will be described with reference to the drawings. As shown in FIGS. 1 to 3, the drain plug device 1 is attached to the wash bowl 100 as a tank body, and includes a drain port member 2, a pipe 3, a plug lid drive mechanism 4, and a plug lid unit 5. Is equipped with. In addition, in FIG. 2 and the like, the illustration of the washbasin 100 is omitted.

The wash bowl 100 is provided with a bottom wall portion 101 that constitutes the bottom surface thereof, and a drain port 102 is formed through the bottom wall portion 101. Further, the wash bowl 100 is provided with an overflow port (not shown) for preventing the overflow of water, and the drainage that has flowed out through the overflow port flows into the inside of the bottom wall portion 101. A drainage space 103 is formed.

The drainage port member 2 is formed in a cylindrical shape, and is inserted into the drainage port 102 in a state where its own central axis and the central axis of the drainage port 102 are substantially aligned with each other. As shown in FIG. 4, the drainage port member 2 includes a flange portion 21 formed so as to project radially outward at the upper end portion thereof, and a male screw portion 22 formed on the outer periphery below the collar portion 21. There is. Further, a plurality of water passage holes 23 are formed through the portion of the drainage port member 2 between the flange portion 21 and the male screw portion 22 at intervals along the circumferential direction.

Then, with the drainage port member 2 being inserted into the drainage port 102 and the flange portion 21 of the drainage port member 2 being arranged on the bottom wall portion 101, the annular first nut member 9a having a female screw on the inner circumference is described. The drainage port member 2 is attached to the wash bowl 100 by being screwed to the male screw portion 22 and sandwiching the wash bowl 100 between the flange portion 21 and the first nut member 9a.

Further, an elastically deformable material (for example, resin, rubber, etc.) is used between the wash bowl 100 and the drainage port member 2 (flange portion 21) and between the wash bowl 100 and the first nut member 9a. The annular sealing members 7 and 8 formed by the above are interposed. These seal members 7 and 8 prevent water leakage from between the drain port member 2 and the wash bowl 100. Further, a thin-walled annular washer component 6 that functions as a sliding ring is arranged between the first nut member 9a and the seal member 8. In the state where the drain port member 2 is attached to the wash bowl 100, the seal members 7 and 8 are in a state of being compressed and deformed, but in FIG. 1 and the like, the seal members 7 and 8 in a state of not being compressed and deformed are shown. There is.

Further, when the drain port member 2 is attached to the wash bowl 100, the water passage hole 23 is in a state of opening toward the drain space 103. As a result, the drainage that has passed through the overflow port flows through the drainage space 103 and the water passage hole 23 into the internal space of the drainage port member 2, that is, the drainage flow path.

The pipe 3 includes a pipe main body 31 and a mounting cylinder 32. The piping main body 31 is a cylindrical part made of metal, resin, or the like that extends along the vertical direction, and is a portion that constitutes a drainage flow path that flows through the drainage port 102. In the present embodiment, the piping main body 31 corresponds to the flow path component.

Further, the pipe main body portion 31 is provided with a folded-back portion 31a bent at a substantially right angle toward the outside at the upper end portion thereof. Then, in a state where the drainage port member 2, the annular inner seal member 10 formed of an elastically deformable material, and the piping main body 31 are arranged in series, the second nut member 9b having an internal thread on the inner circumference is formed. Is screwed into the male threaded portion 22, and the folded-back portion 31a and the inner sealing member 10 are sandwiched between the inner flange provided on the inner circumference of the end of the second nut member 9b and the lower end of the drainage port member 2. By doing so, the pipe main body 31 is connected in series to the drainage port member 2 in a watertight state.

Further, the piping main body 31 is provided with a circular through hole 31b. The through hole 31b is provided for installing the support projection 412 of the plug lid drive mechanism 4, which will be described later, in the pipe 3 (that is, the drainage flow path).

The mounting cylinder portion 32 is a portion fixed to the outer periphery of the piping main body portion 31 and has a cylindrical shape as a whole, and functions as a mounting target of the plug lid drive mechanism 4. In the present embodiment, the mounting cylinder portion 32 is integrally formed with a pair of band portions 33 having a curved plate shape along the outer peripheral surface of the pipe 3, and is on the side opposite to the mounting cylinder portion 32 in each band portion 33. A semi-cracked cylindrical semi-cylindrical threaded portion 33a is provided at the end to form a male thread on the outer circumference when combined (see FIG. 8). Then, after the band portion 33 is wound around the piping main body 31, the bag nut portion 34 having a female screw on the inner circumference is screwed into the semi-cylindrical threaded portion 33a to form the piping main body 31. The mounting cylinder portion 32 is in a mounted state.

In the present embodiment, the portion of the mounting cylinder portion 32 installed on the pipe main body 31 side has a cylindrical shape having an outer diameter substantially the same as the inner diameter of the through hole 31b (slightly smaller than the inner diameter). The alignment cylinder portion 32a is provided. When the mounting cylinder portion 32 is attached to the piping main body portion 31, the mounting cylinder portion 32 can be aligned with the piping main body portion 31 by inserting the alignment cylinder portion 32a into the through hole 31b. It has become like.

Further, an annular sealing member 11 for a mounting cylinder formed of an elastically deformable material is interposed between the outer peripheral surface of the piping main body 31 and the mounting cylinder portion 32. The mounting cylinder seal member 11 prevents water leakage from passing between the piping main body 31 and the mounting cylinder 32.

Further, a collar-shaped portion protruding outward is provided at an end portion of the mounting cylinder portion 32 located on the opposite side of the piping main body portion 31, and a stopper lid driving mechanism 4 is attached to the collar-shaped portion. A locked hole 32b for the purpose is formed through (see FIG. 5). The locked hole portion 32b has a curved shape extending along the circumferential direction of the mounting cylinder portion 32, and a plurality of (three in the present embodiment) are provided at intervals along the circumferential direction. There is.

The plug lid drive mechanism 4 is a mechanism for moving the plug lid unit 5 up and down. The plug lid drive mechanism 4 includes a rotating body 41 including a rotatable rotating portion 411 and a support projection 412 that can move up and down with the rotation of the rotating portion 411. The stopper lid drive mechanism 4 is attached to the mounting cylinder portion 32 in a state where the support protrusion 412 is arranged in the piping main body portion 31. The support protrusion 412 is relatively short, and is configured so that its tip does not reach the central axis of the pipe body 31. The details of the plug lid drive mechanism 4 will be described later.

The stopper lid unit 5 is provided corresponding to the drainage flow path in order to open and close the drainage port 102 and the like. The stopper lid unit 5 has a support member 51 and a stopper lid 52.

The support member 51 is arranged in the drainage port member 2 and the pipe main body 31 so as to be movable up and down along the inner peripheral surface of the drainage port member 2 and the pipe main body 31. The support member 51 includes a support shaft 51a arranged substantially at the center of the drainage port member 2, a plurality of blade portions 51b (four in the present embodiment) protruding outward from the support shaft 51a, and a lower portion of the support shaft 51a. It is provided with an annular supported portion 51c connected to the above.

The support shaft 51a has a straight rod shape, and its upper end is fitted to a cylindrical portion provided in the center portion of the back surface of the plug lid 52. As a result, the plug lid 52 is attached to the upper end of the support shaft 51a, and the plug lid 52 is supported by the support shaft 51a.

The blade portion 51b has a plate shape protruding outward from the side surface of the support shaft 51a. Each blade portion 51b is arranged so that its outer edge portion is close to the inner peripheral surface of the drain port member 2, and as a result, the position of the stopper lid unit 5 is displaced along the horizontal direction and the stopper lid unit 5 is arranged. It is possible to suppress the tilt.

The supported portion 51c is a portion supported by the support projection 412, and the outer peripheral surface is in a state of being close to the inner peripheral surface of the pipe main body portion 31.

The stopper lid 52 is for opening and closing the drain port 102, and is indirectly supported by the support projection 412 via the support member 51. The stopper lid 52 includes a disk-shaped stopper lid main body 52a made of resin or the like, and a packing portion 52b attached to the stopper lid main body 52a. The packing portion 52b is formed in an annular shape by an elastically deformable material (for example, rubber, resin, etc.), and is fitted into a recess that opens to the outside, which is provided on the outer peripheral side behind the stopper lid main body portion 52a. It is said to be in a state.

In the present embodiment, the rotating portion 411 rotates to one side and the support protrusion 412 moves downward, so that the support member 51 and the plug lid 52 move downward. Then, the entire outer peripheral portion of the packing portion 52b comes into contact with the drain port member 2, so that the drain port 102 is closed. On the other hand, when the rotating portion 411 rotates to the other side and the support protrusion 412 moves upward, the supported portion 51c is lifted by the support protrusion 412, and the support member 51 and the plug lid 52 move upward. .. As a result, the packing portion 52b is separated from the drain port member 2, so that the drain port 102 is opened (see FIG. 1).

In the present embodiment, the drainage port 102 is closed, and when the support projection 412 is arranged at the lowest position, the support member 51 (supported portion 51c) floats from the support projection 412. Therefore, when the drain port 102 is closed, the packing portion 52b can be more reliably brought into contact with the drain port member 2, and good watertightness can be obtained.

Further, in the present embodiment, the plug lid unit 5 can be pulled out from the drain port member 2 and the piping main body 31 by pulling up the plug lid 52 upward from the front side (water storage space side) of the wash bowl 100. .. Then, in the state where the plug lid unit 5 is pulled out, only the support protrusion 412 slightly protrudes inside the pipe main body 31 in the drainage flow path. Therefore, it is possible to improve maintainability and cleanability.

Next, the plug lid drive mechanism 4 will be described in more detail. As shown in FIG. 6, the plug lid drive mechanism 4 includes an outer peripheral arrangement portion 42, a gearbox portion 43, and a rack portion 44 in addition to the rotating body 41 described above.

As described above, the rotating body 41 includes a rotating portion 411 and a support protrusion 412. The rotating portion 411 includes a flow path side disk portion 411a, an intermediate portion 411b, and a gear portion 411c, and these are arranged coaxially in this order.

The flow path side disk portion 411a is provided at one end of the rotating portion 411, and in a state where the plug lid drive mechanism 4 is attached to the mounting cylinder portion 32, the internal space side of the piping main body portion 31, that is, the flow of drainage It is a part that is arranged so as to face the roadside. The flow path side disk portion 411a has a disk shape, and its maximum outer diameter is substantially the same as the inner diameter of the mounting cylinder portion 32.

The intermediate portion 411b has a columnar shape having a smaller diameter than the flow path side disk portion 411a. An annular inner packing 45 formed of a predetermined elastically deformable material (for example, rubber, resin, etc.) is fitted on the outer periphery of the base portion of the intermediate portion 411b located on the flow path side disk portion 411a side. On the other hand, a plurality of recesses are formed on the outer periphery of the portion of the intermediate portion 411b located closer to the gear portion 411c than the inner packing 45. By providing this recess, it is possible to reduce the frictional resistance generated between the intermediate portion 411b and the outer peripheral arrangement portion 42 (particularly the intervening cylindrical portion 42a described later) arranged on the outer periphery thereof, and by extension, the rotating portion 411. It is possible to achieve smooth rotation.

The gear portion 411c is a portion for transmitting a driving force to and from the rack portion 44. The gear portion 411c is composed of a plurality of teeth provided on the outer periphery of the other end of the rotating portion 411. In the present embodiment, each of the teeth constituting the gear portion 411c extends in parallel with the rotation axis of the rotating body 41. Further, the outer diameter of the gear portion 411c is substantially the same as the outer diameter of the intermediate portion 411b.

Further, the rotating portion 411 is provided with a groove portion 411d extending along the circumferential direction of the rotating portion 411 on the outer peripheral portion between the intermediate portion 411b and the gear portion 411c. In the present embodiment, the groove portion 411d is provided over the entire circumference of the rotating portion 411 in the circumferential direction.

The support protrusion 412 projects into the piping main body 31 from a portion near the outer circumference on the tip surface (end surface of the flow path side disk portion 411a) of the rotating portion 411, and indirectly supports the plug lid 52 by supporting the support member 51. I support it. The support protrusion 412 moves up and down with the rotation of the rotating portion 411.

The outer peripheral arrangement portion 42 is arranged outside the intermediate portion 411b, and includes an intervening cylindrical portion 42a and an outer packing 42b.

The intervening cylindrical portion 42a has a cylindrical shape with an annular groove on the outer circumference, and is provided on the outer periphery of the intermediate portion 411b in a state of being sandwiched between the flow path side disk portion 411a and the rack portion 44 or the gearbox portion 43. Has been done. When the plug lid drive mechanism 4 is a single unit (not attached to the mounting cylinder portion 32), the intervening cylindrical portion 42a and the flow path side disc portion 411a are in a state of being out of the gearbox portion 43. It is configured to be.

On the other hand, the intervening cylindrical portion 42a is in a state of being interposed between the intermediate portion 411b and the mounting cylinder portion 32 in a state where the plug lid driving mechanism 4 is attached to the mounting cylinder portion 32. Then, in the state where the plug lid drive mechanism 4 is attached to the mounting cylinder portion 32, the inner packing 45 is sandwiched between the outer peripheral surface of the intervening cylindrical portion 42a and the inner peripheral surface of the intermediate portion 411b. As a result, it is possible to suppress the intrusion of water into the inside of the gearbox portion 43 that has passed between the intermediate portion 411b and the intervening cylindrical portion 42a.

The outer packing 42b is an annular part formed of a predetermined elastically deformable material (for example, rubber, resin, etc.), and is arranged in the groove formed on the outer periphery of the intervening cylindrical portion 42a. The outer packing 42b is in a state of being sandwiched between the outer peripheral surface of the intervening cylindrical portion 42a and the inner peripheral surface of the mounting cylinder portion 32 in a state where the stopper lid drive mechanism 4 is attached to the mounting cylinder portion 32. As a result, the ingress of water into the inside of the gearbox portion 43 that has passed between the mounting cylinder portion 32 and the intervening cylindrical portion 42a is suppressed.

The intervening cylindrical portion 42a does not actively rotate relative to the mounting cylinder portion 32 in a state where the plug lid drive mechanism 4 is attached to the mounting cylinder portion 32, and basically the outer packing 42b ( It becomes a fixed state by the frictional force generated in. In the present embodiment, when the rotating body 41 rotates, the intermediate portion 411b rotates on the inner circumference of the intervening cylindrical portion 42a. Therefore, when the rotating body 41 rotates by making the intermediate portion 411b a large diameter. The frictional resistance generated during rotation can be made smaller than that in the case where the frictional resistance is generated between the intermediate portion 411b and the mounting cylinder portion 32. That is, the intervening cylindrical portion 42a has a function of reducing the frictional resistance when the rotating body 41 is rotated. Further, the outer packing 42b functions not only in ensuring watertightness but also in restricting the relative rotation of the intervening cylindrical portion 42a with respect to the mounting cylinder portion 32.

The gearbox portion 43 accommodates a part of the rotating body 41 and the rack portion 44. In the present embodiment, the gearbox portion 43 is attached to the mounting cylinder portion 32, and also functions as a mounting portion of the plug lid drive mechanism 4 to the mounting cylinder portion 32. Further, the gearbox portion 43 is composed of a single component. That is, the gearbox portion 43 is not configured by combining a plurality of components, but is composed of one component. The gearbox portion 43 includes a gear accommodating portion 431, a locking portion 432, and a rack accommodating portion 433.

The gear accommodating portion 431 has a cylindrical shape with its end closed (see FIG. 2 and the like), and accommodates the gear accommodating portion 411c inside. Further, the end portion (closing portion) of the gear accommodating portion 431 is provided with a protrusion 431a for supporting the inner peripheral surface of the end portion of the rotating body 41 accommodated in the gear accommodating portion 431.

The locking portion 432 is formed so as to project from the end surface of the collar-shaped portion of the gearbox portion 43. The flange-shaped portion of the gearbox portion 43 is a portion of the gearbox portion 43 that is formed so as to project outward at the end portion on the opening side through which the rotating body 41 and the intervening cylindrical portion 42a pass. The locking portions 432 are portions used for mounting the plug lid drive mechanism 4 to the mounting cylinder portion 32, and a plurality of locking portions 432 (three in the present embodiment) are provided at intervals along the circumferential direction of the collar-shaped portion. Has been done. Further, the tip of each locking portion 432 is provided with a claw portion 432a that projects outward (the side opposite to the rotation axis of the rotating body 41).

In the present embodiment, the stopper lid drive mechanism 4 is attached to the attachment cylinder portion 32 as follows. That is, while inserting the flow path side disk portion 411a and the intervening cylindrical portion 42a protruding from the gearbox portion 43 into the mounting cylinder portion 32, the locking portion 432 is inserted into each locked hole portion 32b. After that, the plug lid drive mechanism 4 (gearbox portion 43) is relatively rotated with respect to the mounting cylinder portion 32, and the claw portion 432a is engaged with the portion forming the locked hole portion 32b in the mounting cylinder portion 32. By stopping, the plug lid drive mechanism 4 is attached to the attachment cylinder portion 32.

The rack accommodating portion 433 has a cylindrical shape in a state of being overpassed with the gear accommodating portion 431 (see FIG. 2 and the like), and is for accommodating the rack portion 44. The internal space of the rack accommodating portion 433 is in a state of communicating with the internal space of the gear accommodating portion 431, and the gear portion 411c and the rack portion 44 are meshed at a position corresponding to the communication portion.

Further, the lid portion 46 is provided so as to close the end opening located on the side opposite to the gear accommodating portion 431 in the rack accommodating portion 433 (see FIGS. 2 and 5 and the like). Then, one end of the outer tube 12 having a long tubular shape is connected and fixed to the lid 46.

The other end of the outer tube 12 is connected and fixed to an operating device (not shown) having a predetermined operating portion (for example, an operating button or an operating lever). An inner wire 13 (see FIG. 3) made of, for example, a stranded wire is inserted through the inner circumference of the outer tube 12 in a state where it can be reciprocated, and the inner wire 13 reciprocates as the operation portion is displaced. It is designed to move. The operation unit may be manually displaced or electrically displaced.

The rack portion 44 is inserted into the rack accommodating portion 433 in a state where it can reciprocate along its own longitudinal direction, and in the present embodiment, the rack portion 44 can reciprocate along the horizontal direction. Further, as shown in FIG. 7, the rack portion 44 has a plurality of parallel teeth 44a arranged along the moving direction thereof. The teeth 44a are directly meshed with the gear portion 411c (see FIG. 5), and the rack portion 44 and the rotating portion 411 are interlocked with each other.

Further, the rack portion 44 is provided with a connection recess 44b for connecting the end portion of the inner wire 13. The inner wire 13 and the rack portion 44 are connected in series by arranging a terminal metal fitting (not shown) provided at the tip of the inner wire 13 with respect to the connection recess 44b. As a result, the rack portion 44 moves forward or backward as the inner wire 13 moves forward or backward, and the rotating portion 411 rotates.

Further, at a portion of the rack portion 44 adjacent to the teeth 44a, a retaining portion 44c forming a ridge extending along the reciprocating movement direction of the rack portion 44 is provided. The retaining portion 44c is arranged in the groove portion 411d of the rotating portion 411 (see FIG. 6), and as a result, the rotating portion 411 (see FIG. 6) with respect to the retaining portion 44c along the rotation axis direction of the rotating portion 411. In particular, the gear portion 411c) is in a locked state. As a result, the rotating portion 411 is prevented from coming off from the mounting cylinder portion 32 to the piping main body portion 31 side.

Further, the rack portion 44 can be inserted into the rack accommodating portion 433 from the opening (the opening finally closed by the lid portion 46) in the rack accommodating portion 433. In the present embodiment, when assembling the plug lid drive mechanism 4, the rack is racked from the opening of the rack accommodating portion 433 to the rack accommodating portion 433 with the gear portion 411c of the rotating portion 411 being accommodated in the gear accommodating portion 431. By inserting the portion 44, the rotating portion 411 can be locked to the retaining portion 44c.

As described in detail above, according to the present embodiment, the retaining portion 44c provided on the rack portion 44 allows the rotating portion 411 to come off from the mounting cylinder portion 32 to the piping main body portion 31 (flow path constituent portion) side. Can be prevented. Therefore, it is not necessary to provide a separate member such as an outer fitting member (for example, a C ring) to prevent it from coming off. Therefore, it is possible to reduce the number of parts and simplify the device, and as a result, it is possible to improve workability related to assembly and maintenance of the device and reduce the manufacturing cost.

Further, in the present embodiment, since the retaining portion 44c is formed by the ridges provided on the rack portion 44, the retaining portion 44c can be realized by a relatively simple structure, and the workability is improved and the manufacturing cost is improved. Can be reduced more effectively.

Further, in the present embodiment, the gearbox portion 43 having the rack accommodating portion 433 and the gear accommodating portion 431 is composed of a single component. That is, the gearbox portion 43 is not formed by combining a plurality of parts, but is composed of one part. Therefore, the number of parts can be further reduced, workability can be improved, and manufacturing cost can be reduced more effectively.

In addition, when assembling the plug lid drive mechanism 4, the rack portion 44 is inserted through the opening of the rack accommodating portion 433 into the rack accommodating portion 433 with the gear portion 411c accommodated in the gear accommodating portion 431. , The rotating portion 411 can be locked (hooked) with respect to the retaining portion 44c. Therefore, by simply inserting the rack portion 44 into the rack accommodating portion 433 without performing any special work such as attaching or arranging the parts for preventing the rotating portion 411 from coming off, the retaining portion 44c rotates. It is possible to prevent the moving portion 411 from coming off. As a result, workability can be improved and manufacturing costs can be reduced even more effectively.

The content is not limited to the description of the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modification examples not illustrated below are also possible.

(A) The pipe 3 in the above embodiment is configured to include a pipe main body 31 and a mounting cylinder 32 which is a separate body from the pipe main body 31, but the pipe 3 is provided with the pipe main body 31 and the mounting cylinder 32. It may be composed of one component integrally provided with. Further, although the piping main body 31 in the above embodiment is composed of one component, it may be composed of two or more components connected in series.

(B) In the above embodiment, the retaining portion 44c is composed of ridges provided on the rack portion 44, but the retaining portion is locked to the rotating portion 411 so that the rotating portion 411 Anything that can prevent it from coming off will do. Therefore, as shown in FIGS. 9 and 10, for example, the gear portion 411e is configured by a two-stage gear displaced by a predetermined amount (for example, half a pitch) in the rotation direction, and is configured to be meshed with the gear portion 411e. The retaining portion 44e may be formed by the teeth 44d of the rack portion 44. In this case, the rack portion 44 includes two rows of teeth 44d arranged along the reciprocating movement direction, and these two rows of teeth 44d are arranged in parallel in a state of being displaced by a predetermined amount along the reciprocating movement direction. It becomes the composition that was done.

Further, as shown in FIGS. 11 and 12, for example, the gear portion 411f is composed of a double helical gear, and the retaining portion 44g is provided by the teeth 44f of the rack portion 44, which are configured to mesh with the gear portion 411f. It may be configured. In this case, the rack portion 44 includes two rows of teeth 44f having different inclination directions with respect to the reciprocating movement direction, and the rows of these two teeth 44f are arranged in parallel.

By forming the retaining portions 44e and 44g with the teeth 44d and 44f of the rack portion meshed with the gear portions 411e and 411f as described above, it is not necessary to provide a special portion for retaining the retaining portion 44 in the rack portion 44. It is possible to more effectively reduce the manufacturing cost.

For example, a ridge portion extending along the rotation direction of the gear portion may be provided on the outer periphery of the gear portion, and a retaining portion may be formed by a portion of the rack portion where the ridge portion is locked. Specifically, for example, the ridge portion is provided on the outer periphery of the end portion of the gear portion that is farthest from the support protrusion 412, while teeth are not provided on the portion of the rack portion corresponding to the ridge portion. By configuring the ridge portion to be locked to the teeth of the portion, the retaining portion may be formed by the teeth of the rack portion.

(C) In the above embodiment, the gearbox portion 43 is attached to the mounting cylinder portion 32 and is separate from the mounting cylinder portion 32, but the gearbox portion 43 is attached to the mounting cylinder portion 32. It may be formed integrally. That is, the gearbox portion 43 and the mounting cylinder portion 32 may be composed of a single component. When the mounting cylinder portion 32 and the piping main body portion 31 are composed of one component, the piping main body portion 31, the mounting cylinder portion 32, and the gearbox portion 43 may be composed of a single component.

(D) In the above embodiment, the rack portion 44 is arranged so as to be reciprocally movable along the horizontal direction, but the rack portion 44 is arranged in a direction intersecting the horizontal direction (for example, a vertical direction or an oblique vertical direction). ) May be arranged in a state where it can be reciprocated.

(E) In the above embodiment, the support protrusion 412 is formed so as to project on the tip surface of the rotating portion 411 at a position deviated from the rotation axis of the rotating portion 411. By forming the shape so that it bends in a shape or the like, the support protrusion is projected from the rotation center (position overlapping the rotation axis) on the tip surface of the rotation portion, and at least the support is supported as the rotation portion rotates. The portion of the protrusion that directly or indirectly supports the plug lid 52 may be configured to move up and down. Further, the support projection may be configured to protrude from the outer peripheral surface of the rotating portion, and the support projection may be configured to move up and down as the rotating portion rotates.

(F) In the above embodiment, the wash bowl 100 is illustrated as the tank body, but the tank body to which the technical idea of the present invention can be applied is not limited to the wash bowl. Therefore, for example, the technical idea of the present invention may be applied to a tank body other than a washbasin such as a bathtub or a kitchen sink.

Further, in the above embodiment, the wash bowl 100 as the tank body is provided with the drainage space 103, but the tank body may not be provided with the drainage space 103. Further, in the above embodiment, the drainage port member 2 is provided with a water passage hole 23 corresponding to the drainage space 103, but when the tank body does not have the drainage space 103, water is passed through the drainage port member. There is no need to provide holes.

(G) In the above embodiment, the drain port 102 is closed when the plug lid 52 (packing portion 52b) comes into contact with the drain port member 2, but the plug lid 52 (packing portion 52b) is closed. ) May come into contact with the bottom wall portion 101 so that the drainage port 102 is closed.

1 ... Drain plug device, 3 ... Piping, 31 ... Piping main body (flow path component), 32 ... Mounting cylinder, 43 ... Gearbox, 44 ... Rack, 44c, 44e, 44g ... Retracting part, 52 ... Plug lid, 100 ... wash bowl (tank body), 102 ... drain port, 411 ... rotating part, 411c ... gear part, 411d ... groove part, 412 ... support protrusion, 431 ... gear accommodating part, 433 ... rack accommodating part.

Claims (5)

A lid that can move up and down to open and close the drain of the tank body,
It has a tubular flow path component through which drainage that has passed through the drainage port flows, and a tubular mounting tube that is provided so that its own internal space communicates with the internal space of the flow path component. And the piping
A rotatable rotating portion inserted into the mounting cylinder portion and
It is provided with a support protrusion that protrudes from the rotating portion and is arranged in the flow path constituent portion to directly or indirectly support the plug lid.
A drain plug device configured so that the plug lid moves up and down by moving the support protrusion up and down while rotating with the rotation of the rotating portion.
It has a rack portion that is meshed with a gear portion provided on the outer circumference of the rotating portion and can reciprocate along its own longitudinal direction.
The rack portion is a drain plug device, characterized in that the rotating portion is locked and provided with a retaining portion for preventing the rotating portion from coming off from the mounting cylinder portion to the flow path constituent portion side. The rotating portion has a groove portion extending along the circumferential direction.
The retaining portion is characterized in that it has a ridge extending along the moving direction of the rack portion and is arranged in the groove portion so that the rotating portion is locked. The drain plug device according to claim 1. The claim is characterized in that the retaining portion is formed by teeth of the rack portion that are meshed with the gear portion and can come into contact with the gear portion along the rotation axis direction of the rotating portion. The drain plug device according to 1. It has a tubular rack accommodating portion in which the rack portion is accommodated, and a gear accommodating portion in which the gear portion in the rotating portion is accommodated, and is mounted on the mounting cylinder portion or integrally with the mounting cylinder portion. Equipped with a gearbox part to be formed
The drain plug device according to any one of claims 1 to 3, wherein the gearbox portion is composed of a single component. The rack housing portion has a tubular shape with an opening at the end.
The rack portion can be inserted from the opening into the rack accommodating portion.
With the gear portion of the rotating portion accommodated in the gear accommodating portion, the rotating portion was locked to the retaining portion by inserting the rack portion through the opening into the rack accommodating portion. The drain plug device according to claim 4, wherein the drain plug device is configured to be in a state.

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