JP6961207B2 - Drain plug device - Google Patents

Description

The present invention relates to a drain plug device provided corresponding to a flow path for drainage from a tank body.

Conventionally, a drain plug device for opening and closing a drain port of a tank body (for example, a bathtub, a wash bowl, etc.) has been known.

The drain plug device includes, for example, a plug lid for opening and closing the drain port, a vertically movable support shaft having a plug lid attached to the upper end portion, and a transmission member (for example, a wire) capable of contacting the lower end portion of the support shaft. Etc.) and. Then, the transmission member moves along the longitudinal direction due to the displacement of a predetermined operation member (for example, an operation button), and the support shaft is pushed up by the end portion of the transmission member, so that the plug lid moves upward and drains water. The mouth is opened.

Further, in recent years, a support member having a tubular portion arranged on the outer periphery of the support shaft and an annular portion arranged along the inner peripheral surface of a pipe (a portion constituting a drainage flow path) has been provided. A drain plug device has been proposed in which a support member (annular portion) is supported by a vertically movable portion that protrudes into the pipe (see, for example, Patent Document 1 and the like). In this drain plug device, the open / closed state of the drain port is switched by moving the support shaft and the plug lid up and down as the vertical movement portion moves up and down.

By the way, when the plug lid and the support shaft are arranged on the upper side (that is, when the drain port is open), the plug lid may be accidentally stepped on or a heavy object may be placed on the plug lid. If it is loosened, a large downward force may be applied to the support shaft. In this case, various members (for example, the vertical movement part, the support shaft, the support member, etc.) that operate when the plug lid is moved up and down may be damaged or deformed, or the support member may come off from the vertical movement part. There is a risk of it getting stuck. Further, even when the operating member is operated in a state where the plug lid cannot move upward (for example, a state in which the plug lid is trampled), the same problem as described above may occur.

Therefore, in the above patent document, after closing the lower opening of the tubular portion with a lid portion, elastic deformation is performed along the axial direction (vertical movement direction) of the support shaft between the lid portion and the lower end portion of the support shaft. A method of providing a possible absorber spring has been proposed. According to this method, when a plug lid or the like is arranged on the upper side and a downward force is applied to the plug lid, the absorber spring is compressed and deformed. As a result, the shock absorber function, that is, the function of absorbing the load on various members such as the support shaft is exhibited, and the above-mentioned problems can be prevented. The support shaft is in a state of being supported by the cylindrical portion by arranging the portion arranged in the tubular portion along the inner surface of the tubular portion.

Japanese Unexamined Patent Publication No. 2016-132897

However, in the above method, since the absorber spring is present, the portion of the support shaft that is arranged in the cylindrical portion is short. Therefore, it becomes difficult to support the support shaft in a stable state, and there is a possibility that the support shaft is likely to be tilted.

If the support shaft tends to tilt, the support shaft (for example, the outer peripheral corner of the lower end of the support shaft) becomes stronger against the inner peripheral surface of the cylindrical portion when a downward force is applied to the support shaft. It is likely to be in a pressure-welded (caught) state, and as a result, a large frictional force is likely to be generated between the support shaft and the tubular portion. Therefore, the absorber spring is not sufficiently compressed, and a large force is applied from the support shaft to the cylindrical portion, so that the shock absorber function may not be sufficiently exhibited.

Further, if the support shaft is likely to be tilted, the stopper lid may be easily tilted. If the plug lid is tilted, the plug lid will not come into contact with the part to be sealed (the part that comes into contact with the plug lid when the drain port is closed by design) when the drain port is closed. It may be sufficient and adversely affect the water stopping property. Further, when the drain port is opened, the appearance of the plug lid may be deteriorated, which may lead to deterioration of the appearance quality.

On the other hand, it is conceivable to shorten the absorber spring in order to lengthen the portion of the support shaft that is arranged in the cylindrical portion, but in this case, the amount of compression deformation in the absorber spring becomes insufficient, resulting in a shock. The absorber function may be impaired.

The present invention has been made in view of the above circumstances, and an object of the present invention is that the shock absorber function can be more reliably exerted, and the inclination of the support shaft and the plug lid can be effectively suppressed. It is an object of the present invention to provide a drain plug device capable of improving water stopping property and appearance quality.

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 stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion .
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
A drain plug device characterized in that the inner surface shape of the tubular portion in an axially orthogonal cross section of the tubular portion is constant over the entire area above the overhanging portion.

In addition, "when the shock absorber function is exhibited" means a state in which the absorber spring is compressed more than in the normal state. Here, the absorber spring in the normal state means an absorber spring in a state where the maximum distance between the overhanging portion and the second supported portion is secured, and the absorber spring in the normal state is compressed and deformed more than the natural length. May be in a state. In other words, "along the inner surface" can be said to be in close proximity to the inner surface.

According to the above means 1, the absorber spring is in a state of being sandwiched between the overhanging portion that supports the first supported portion and the second supported portion. Therefore, as a result, a large distance between the first supported portion and the second supported portion can be secured, and by extension, both supported portions in a state of being largely separated can be supported by the tubular portion. As a result, the support shaft can be supported in a stable state and in a state of little inclination. As a result, the shock absorber function can be more reliably exerted. In addition, the inclination of the stopper lid can be effectively suppressed, and the water stopping property and the appearance quality can be improved.

Further, the absorber spring can be made sufficiently long, and a large amount of compression deformation can be secured in the absorber spring. Therefore, the shock absorber function can be more reliably and effectively exerted, and damage or deformation of various members such as the support shaft and the vertically moving portion can be prevented more reliably.

Further, in the above means 1, the support shaft is in a state where the second supported portion is supported by the overhanging portion via the absorber spring, so that the support shaft does not come off from the lower opening of the tubular portion. According to the above, the upward movement of the support shaft can be restricted by the contact of the upward movement restricting portion with the overhanging portion, and the support shaft can be prevented from coming off from the upper opening of the cylindrical portion. Therefore, it is possible to reliably prevent the support shaft from falling off from the tubular portion. As a result, it is possible to improve the convenience of handling the device during installation work, cleaning, and the like. In addition, the operational stability of the device can be improved.

Further, conventionally, in order to prevent the support shaft from coming off from the tubular portion, a method of providing an inwardly projecting portion on the upper portion of the tubular portion is adopted, but according to the above means 1, the tubular portion is formed. Taking advantage of the fact that it is not necessary to have such a shape, the inner surface shape of the cylindrical portion in the axially orthogonal cross section of the tubular portion is made constant over the entire area above the overhanging portion. For example, when the inner surface shape of the tubular portion in the axially orthogonal cross section is circular, the inner diameter of the entire region of the tubular portion located above the overhanging portion is constant. Therefore, it is not necessary to make the support shaft thinner corresponding to the protrusion as in the conventional case, and the support shaft can be made thicker as a whole. As a result, the strength of the support shaft can be improved. Further, the support shaft can be supported more stably by the cylindrical portion, and the inclination of the support shaft can be suppressed more reliably.

Further, when the conventional protrusion is provided, the thickness of the tubular portion is the thickness of the tubular portion, the thickness of the support shaft, the size of the gap between the tubular portion (projection) and the support shaft. And, while it is based on the amount of protrusion inward of the protrusion, according to the above means 1, since the protrusion is unnecessary, the thickness of the tubular portion is the thickness of the tubular portion and the support shaft. It is based on the thickness of the cylinder and the size of the gap between the cylindrical part and the support shaft. Therefore, according to the above means 1, the cylindrical portion can be made relatively thin while the support shaft is made thick to improve the strength. As a result, it is possible to secure a larger water flow area and improve the drainage capacity. In addition, costs related to manufacturing and the like (for example, material costs and the like) can be reduced.

Means 2 . The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The drain plug device according to means 1 , wherein the upward movement restricting portion has a chamfered portion having a chamfered shape in a portion from the upper surface to the side surface located on the overhanging portion side.

It should be noted that the above-mentioned means 1 and the above-mentioned means 2 mean the same thing, and it is not intended that the above-mentioned means 2 subordinate to the above-mentioned means 1 have a plurality of above-mentioned movement regulating units. The same applies to the means 4 described later.

According to the above means 2 , the portion of the upper movement restricting portion from the upper surface to the side surface thereof is a chamfered portion. Therefore, it is more reliable that the compression repulsive force generated by the absorber spring causes a finger or the like to be pinched between the upper movement restricting portion and the lower end portion of the cylindrical portion during handling such as installation work or cleaning. Can be prevented. As a result, convenience and safety during handling can be further enhanced.

Means 3. A stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion.
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The upper movement restricting portion is a drain plug device having a chamfered portion having a chamfered shape at a portion from the upper surface to the side surface located on the overhanging portion side.

According to the above-mentioned means 3, the same action and effect as the above-mentioned means 2 are exhibited.

Means 4 . The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The drain plug device according to any one of means 1 to 3 , wherein the tubular portion has an accommodating portion in which the upward movement restricting portion is accommodated, at least in a state where the shock absorber function is not exhibited. ..

According to the above means 4 , at least in a state where the shock absorber function is not exhibited, the upper movement restricting portion is accommodated with respect to the accommodating portion. Therefore, the aesthetic appearance of the device can be improved. In addition, it is possible to suppress the adhesion of foreign matter such as dust and hair to the upper movement control portion, and it is possible to improve hygiene and cleanability.

Means 5. A stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion.
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The drainage plug device is characterized in that the tubular portion has an accommodating portion in which the upward movement restricting portion is accommodated, at least in a state where the shock absorber function is not exhibited.

According to the means 5, the same effects as those of the means 4 are exhibited.

Means 6 . It is characterized in that the lower end surface of the upper movement restricting portion and the lower end surface of the tubular portion are flush with each other in a state where the upper movement restricting portion is accommodated in the accommodating portion. The drain plug device according to means 4 or 5.

According to the above means 6 , since the lower end surface of the upward movement restricting portion and the lower end surface of the cylindrical portion are flush with each other, the aesthetic appearance of the device can be further improved. Further, at the time of cleaning, the lower end surface of the upward movement restricting portion and the lower end surface of the cylindrical portion can be wiped or rubbed at the same time, so that the cleaning property can be further improved.

It is a partially broken front view of the drain plug device when the drain port is closed. It is a partially broken front view of the drain plug device when the drain port is opened. It is a partially broken front view of the drain plug device in the state where the shock absorber function is exhibited when the drain port is opened. It is sectional drawing of the shock absorber in the state which the shock absorber function is not exhibited. It is sectional drawing of the shock absorber in the state which the shock absorber function is exhibited.

Hereinafter, one embodiment will be described with reference to the drawings. As shown in FIG. 1, the drain plug device 1 is attached to a wash bowl 100 as a tank body, and includes a drain port member 2, a drain pipe 3, a plug lid side drive unit 4, and a plug lid unit 5. It has.

The wash ball 100 is provided with a bottom surface portion 101 constituting the bottom surface thereof, and the bottom surface portion 101 has a hanging portion 102 that hangs downward and projects inward from the lower portion of the hanging portion 102. An inner flange portion 103 is provided. The hanging portion 102 has a cylindrical shape in which the inner diameter gradually increases toward the upper side. Further, a drainage port 104 is formed inside the inner flange portion 103. Further, a peripheral wall portion (not shown) is erected on the outer periphery of the bottom surface portion 101, and an overflow port (not shown) for preventing the overflow of water is formed through the peripheral wall portion.

The drainage port member 2 is formed in a cylindrical shape, and is inserted into the drainage port 104 in a state where its own central axis and the central axis of the drainage port 104 are substantially aligned with each other. The drainage port member 2 includes a flange portion 21 formed so as to protrude outward in the radial direction at the upper end portion thereof, and a male screw portion 22 formed on the outer periphery below the collar portion 21.

The drainage pipe 3 includes a cylindrical main body pipe 31 extending along the vertical direction, and a cylindrical mounting pipe 32 and a connecting pipe 33 extending from the main body pipe 31 in a branched state, respectively.

The main body tube 31 is provided with a female threaded portion 31A capable of screwing the male threaded portion 22 on the inner circumference of one end (upper end) thereof. Then, with the collar portion 21 arranged on the inner collar portion 103, the male screw portion 22 is screwed into the female screw portion 31A, and the inner collar portion 103 is sandwiched between the collar portion 21 and the upper end surface of the drain pipe 3 to drain the water. The mouth member 2 and the drain pipe 3 are connected, and both are attached to the wash bowl 100.

Further, in the present embodiment, there is elasticity between the washbasin ball 100 (inner collar portion 103) and the drain port member 2 (flange portion 21), and between the upper end surface of the drainage pipe 3 and the washbasin ball 100, respectively. An annular seal members 6 and 7 formed of a deformable material are interposed. These seal members 6 and 7 prevent water leakage from between the drain port member 2 and the drain pipe 3 and the wash bowl 100.

The attachment pipe 32 is a portion to which the plug lid side drive unit 4 is attached. The mounting pipe 32 is formed so as to project horizontally from the outer periphery of the main body pipe 31, and its own internal space communicates with the internal space of the main body pipe 31.

The connecting pipe 33 is a portion to which a connecting pipe (not shown) for flowing the drainage flowing into the overflow port is connected. The connecting pipe 33 is formed so as to project obliquely upward from the outer circumference of the main body pipe 31, and its own internal space communicates with the internal space of the main body pipe 31. Then, the drainage that has flowed into the overflow port is guided into the main body pipe 31 through the connecting pipe and the connecting pipe 33.

The plug lid side drive unit 4 is a mechanism for moving the plug lid unit 5 up and down. The plug lid side drive unit 4 includes a rotating unit 41, a packing unit 42, and a vertical moving unit 43.

The rotating portion 41 is inserted into the mounting pipe 32, and is rotatable about its own central axis extending in the horizontal direction as a rotating shaft. The rotating portion 41 rotates by a driving force applied from a transmission member (for example, a wire or the like) (not shown). The transmission member reciprocates with the displacement of a predetermined operating member (for example, an operating button) (not shown). Further, one end surface of the rotating portion 41 faces the internal space side of the drainage pipe 3 (main body pipe 31), but is configured so as not to be arranged in the internal space.

The packing portion 42 is provided in a state of being sandwiched between the outer peripheral surface of the rotating portion 41 and the inner peripheral surface of the mounting pipe 32, and is intended to prevent water leakage from between the rotating portion 41 and the mounting pipe 32. ..

The vertical moving portion 43 has a columnar shape and protrudes from a portion closer to the outer circumference on one end surface of the rotating portion 41. The vertical movement portion 43 is arranged in the internal space of the drainage pipe 3 (main body pipe 31), and moves up and down as the rotating portion 41 rotates. Further, the vertical movement portion 43 is relatively short, and is configured so that the tip thereof does not reach the central axis of the drainage pipe 3 (main body pipe 31).

The plug lid unit 5 is a member provided corresponding to the drainage flow path in order to open and close the drainage port 104 and the like. The plug lid unit 5 has a support member 51, a support shaft 52, an absorber spring 53, a hair catcher 54, and a plug lid 55.

The support member 51 is arranged so as to be able to move up and down along the inner peripheral surface of the main body tube 31. The support member 51 includes a tubular portion 511 arranged at the center of the main body tube 31 and a supported portion 512 provided on the outside of the tubular portion 511.

The tubular portion 511 is a portion that supports the support shaft 52 inserted into its inner circumference via the absorber spring 53.

The supported portion 512 is a portion supported by the vertical moving portion 43, and is an arm portion that connects the annular portion arranged in a state close to the inner peripheral surface of the main body tube 31 and the cylindrical portion 511 and the annular portion. And have. The supported portion 512 is supported by the vertical moving portion 43 by placing the lower surface of the annular portion on the vertical moving portion 43. A plurality of the arm portions are provided at intervals along the circumferential direction of the tubular portion 511, and drainage flows through a gap between the adjacent arm portions.

The support shaft 52 has a rod shape, and its upper end is fitted to the cylindrical attached cylinder portion 55C provided in the center portion of the back surface of the stopper lid 55, so that the support shaft 52 is attached to the stopper lid 55. It supports the stopper lid 55. In the present embodiment, the C ring 9 is provided in the groove-shaped portion on the outer periphery of the upper end side of the support shaft 52, and the C ring 9 is arranged in the recessed portion provided on the inner circumference of the attached cylinder portion 55C. As a result, the plug lid 55 is attached to the support shaft 52.

The absorber spring 53 is formed by spirally winding a predetermined metal wire, and is provided between the inner peripheral surface of the tubular portion 511 and the outer peripheral surface of the support shaft 52. The absorber spring 53 is sandwiched between the overhanging portion 511B and the second supported portion 521E, which will be described later, respectively, and is elastically deformable along the axial direction of the support shaft 52.

In the present embodiment, the cylindrical portion 511, the support shaft 52, and the absorber spring 53 constitute a shock absorber 8 for absorbing a load when a downward force is applied to the plug lid 55. Details of the shock absorber 8, such as the detailed configuration of the tubular portion 511, the support shaft 52, and the absorber spring 53, will be described later.

The hair catcher 54 is arranged inside the hanging portion 102 and is for collecting foreign matter such as dust and hair contained in the drainage. The hair catcher 54 is supported by the hanging portion 102 by placing its outer edge portion on the tapered portion of the hanging portion 102. Further, a cylindrical portion is provided at the center of the hair catcher 54, and the support shaft 52 is inserted into the tubular portion in a state in which the support shaft 52 can move relative to the tubular portion. Therefore, the arrangement position of the hair catcher 54 does not change even when the support shaft 52 moves up and down.

The stopper lid 55 includes a disk-shaped stopper lid main body 55A made of resin or the like, and a packing portion 55B attached to the stopper lid main body 55A. The packing portion 55B is formed in an annular shape by an elastically deformable material (for example, rubber, resin, etc.), and is fitted into a recess opened to the outside provided on the outer peripheral side of the back surface of the stopper lid main body portion 55A. It is said that it is in a state of being.

In the present embodiment, the rotating portion 41 rotates to one side and the vertically moving portion 43 moves upward, so that the vertically moving portion 43 lifts the supported portion 512 of the support member 51, and eventually the support shaft 52. And the stopper lid 55 moves up. As a result, the packing portion 55B is separated from the bottom surface portion 101 (hanging portion 102), so that the drain port 104 is opened (see FIG. 2). On the other hand, the rotating portion 41 rotates to the other side and the vertical moving portion 43 moves downward, so that the support shaft 52 and the plug lid 55 move downward. Then, the entire outer peripheral portion of the packing portion 55B comes into contact with a predetermined portion to be sealed on the bottom surface portion 101 (hanging portion 102), so that the drain port 104 is closed.

In the present embodiment, when the drain port 104 is closed and the vertical moving portion 43 is arranged at the lowest position, the support member 51 (the annular portion of the supported portion 512) floats from the vertical moving portion 43. It will be in a state of Therefore, when the drain port 104 is closed, the packing portion 55B can be more reliably brought into contact with the bottom surface portion 101, and good watertightness can be obtained.

Further, in the present embodiment, the plug lid unit 5 is composed of a hanging portion 102, a drain port member 2, and a main body pipe 31 by pulling up the plug lid 55 and the support shaft 52 upward from the front side of the wash bowl 100. It can be pulled out from the tubular portion, that is, from the tubular portion that constitutes the drainage flow path. Then, in the state where the plug lid unit 5 is pulled out, only the vertical moving portion 43 is slightly projected from the cylindrical portion constituting the drainage flow path. Therefore, it is possible to improve maintainability and cleanability.

Next, the shock absorber 8 will be described. As shown in FIG. 3, the shock absorber 8 applies a downward force to the stopper lid 55 when the drain port 104 is in the open state, for example, when a heavy object is placed on the stopper lid 55. At that time, the absorber spring 53 is compressed and deformed to exert a function of absorbing a load, that is, a shock absorber function.

The phrase "when the shock absorber function is exhibited" means a state in which the absorber spring 53 is compressed more than in the normal state. Here, the absorber spring 53 in the normal state refers to the absorber spring 53 in a state where the maximum distance between the overhanging portion 511B and the second supported portion 521E, which will be described later, is secured, respectively. In the present embodiment, the absorber spring 53 in the normal state is in a state of being slightly compressed and deformed from the natural length.

However, the amount of compression deformation in the absorber spring 53 in the normal state can be appropriately changed according to the setting related to the strength of the absorber function. Further, as the absorber spring 53, various springs having different strengths (spring constants) can be appropriately used according to various conditions. For example, the absorber spring 53 used in a tank body having a deep water depth is stronger than the absorber spring 53 used in a tank body having a shallow water depth.

As described above, the shock absorber 8 includes a cylindrical portion 511, a support shaft 52, and an absorber spring 53. Next, these configurations will be described with reference to FIGS. 4 and 5.

On the inner peripheral surface of the tubular portion 511, a constant inner diameter portion 511A, an overhanging portion 511B, and a lower large diameter portion 511C are provided in this order from the upper end to the lower end.

The constant inner diameter portion 511A is continuously provided from the upper end of the inner peripheral surface of the tubular portion 511 to the overhanging portion 511B, and has a constant inner diameter. As a result, the shape of the inner peripheral surface of the tubular portion 511 in the axially orthogonal cross section of the tubular portion 511 is made constant over the entire area above the overhanging portion 511B. The term "constant" is not limited to a strict constant, but includes almost a constant. Therefore, in the present embodiment, the uppermost end of the inner peripheral surface of the tubular portion 511 has a slightly larger diameter than the inner peripheral surface immediately below the tubular portion 511, but the uppermost end of the inner peripheral surface of the tubular portion 511 also has a constant inner diameter. It is included in part 511A.

The overhanging portion 511B has a shape protruding toward the side surface of the support shaft 52, and has an annular shape in a plan view. The overhanging portion 511B has a smaller diameter than the constant inner diameter portion 511A, and has a substantially constant inner diameter along the axial direction of the tubular portion 511. Further, the overhanging portion 511B is provided below the center of the tubular portion 511 along the axial direction thereof. In particular, in the present embodiment, when the overall length of the inner peripheral surface of the tubular portion 511 along the axial direction of the tubular portion 511 is L, the overhanging portion 511B is from the upper end of the inner peripheral surface of the tubular portion 511. It is provided at a position separated by 2/3 or more of the total length L.

The lower large diameter portion 511C is formed to have a larger diameter than the overhanging portion 511B, and has a substantially constant inner diameter along the axial direction of the tubular portion 511.

Further, the cylindrical portion 511 includes an accommodating portion 511D which is a space which is surrounded by a lower large diameter portion 511C and opens downward. The accommodating portion 511D is a space for accommodating the upward movement restricting portion 522 described below, at least in a state where the shock absorber function is not exhibited, that is, in the state shown in FIG.

The support shaft 52 includes a shaft main body portion 521 having a rod-like cross section and an upward movement restricting portion 522 attached to the lower portion of the shaft main body portion 521.

The shaft main body portion 521 is provided with a large diameter portion 521A, a small diameter portion 521B, a minimum locking diameter portion 521C, and a locked head portion 521D in this order from the upper end to the lower end on the side surface portion thereof.

The large diameter portion 521A has a columnar shape having a constant outer diameter in the entire region except for the groove-shaped portion in which the C ring 9 is arranged. The large-diameter portion 521A is configured such that the upper end portion is inserted into the attached cylinder portion 55C, while at least the lower portion is always arranged on the inner circumference of the tubular portion 511. The second supported portion 521E is formed by a portion of the large-diameter portion 521A that is inserted through the tubular portion 511, that is, a portion that is arranged along the inner circumference of the constant inner diameter portion 511A.

The second supported portion 521E is a portion supported by the inner surface of the cylindrical portion 511 (constant inner diameter portion 511A). The second supported portion 521E is composed of a portion of the large diameter portion 521A that is arranged along the inner peripheral surface of the upper portion of the constant inner diameter portion 511A in a state where the shock absorber function is not exhibited (FIG. 4). reference). On the other hand, in the state where the shock absorber function is exhibited, the second supported portion 521E is along the inner peripheral surface of the portion of the large diameter portion 521A from the uppermost portion to the substantially central portion in the axial direction of the constant inner diameter portion 511A. It is composed of the parts to be arranged (see FIG. 5). That is, the second supported portion 521E is longer along the axial direction of the support shaft 52 when the shock absorber function is exerted than when the shock absorber function is not exerted. It is configured.

The small diameter portion 521B has a smaller diameter than the large diameter portion 521A, and a part thereof is arranged along the inner peripheral surface of the overhanging portion 511B. The first supported portion 521F is formed by a portion of the small diameter portion 521B arranged along the inner peripheral surface of the overhanging portion 511B.

Here, the first supported portion 521F is composed of a lower portion of the small diameter portion 521B in a state where the shock absorber function is not exhibited. On the other hand, the first supported portion 521F is composed of an intermediate portion of the small diameter portion 521B in a state where the shock absorber function is exhibited (see FIG. 5).

Further, an absorber spring 53 is arranged on the outer periphery of a portion of the small diameter portion 521B located between the overhanging portion 511B (first supported portion 521F) and the large diameter portion 521A (second supported portion 521E). In the present embodiment, the intermediate portion 521G is formed by the portions of the small diameter portion 521B located between the overhanging portion 511B (first supported portion 521F) and the large diameter portion 521A (second supported portion 521E). ..

The locking minimum diameter portion 521C and the locked head 521D are portions provided for mounting the upward movement restricting portion 522, respectively. The locking minimum diameter portion 521C has a diameter smaller than that of the locked head portion 521D, and is a portion forming a groove for arranging the claw portion 522C, which will be described later. The locked head 521D has a brim shape that bulges outward, and is a portion where the claw portion 522C is locked.

The upward movement restricting portion 522 is a member for preventing the support shaft 52 from coming off from the upper opening of the tubular portion 511 due to the compression repulsive force generated by the absorber spring 53. The upper movement restricting portion 522 has a bottomed cylindrical shape, and has a shape protruding outward from the shaft main body portion 521. The upward movement restricting portion 522 is located on the side opposite to the absorber spring 53 with the overhanging portion 511B sandwiched along the axial direction of the support shaft 52, and in a state where the shock absorber function is not exhibited, the overhanging portion 511B is provided. It is configured so that it comes into contact with the housing portion 511D and is stored in the housing portion 511D.

The upward movement restricting portion 522 includes a disk-shaped bottom wall portion 522A, a cylindrical side wall portion 522B erected on the outer peripheral portion of the bottom wall portion 522A, and the side wall portion 522B from the inner circumference to the inside of the tip portion. It is provided with a claw portion 522C that protrudes from the surface.

The bottom wall portion 522A corresponds to the lower opening of the accommodating portion 511D and has a disk shape having substantially the same shape as the lower opening. Further, the lower end surface of the bottom wall portion 522A is configured to be flush with the lower end surface of the tubular portion 511 in a state where the upper movement restricting portion 522 is accommodated in the accommodating portion 511D. That is, in a state where the upper movement restricting portion 522 is accommodated in the accommodating portion 511D, the lower end surface of the upper movement restricting portion 522 and the lower end surface of the tubular portion 511 are configured to be flush with each other. In the present embodiment, the lower end surface of the upper movement regulating portion 522 (bottom wall portion 522A) is a flat surface without holes. For example, when the upper movement regulating portion 522 is formed by molding, A hole for die cutting or the like may be provided in the bottom wall portion 522A.

A pair of claw portions 522C are provided at positions sandwiching the central axis of the side wall portion 522B. Both claw portions 522C are elastically deformable along the inward and outward directions.

In the present embodiment, the absorber spring 53 is compressed, and the locked head 521D is projected from the lower end of the tubular portion 511 while the locked minimum diameter portion 521C and the locked head 521D are projected from the lower end of the tubular portion 511. By pushing it inward and arranging the claw portion 522C in the groove composed of the minimum locking portion 521C and locking it to the locked head 521D, the upward movement restricting portion with respect to the shaft main body portion 521. 522 is attached. That is, the shaft main body portion 521 and the upward movement restricting portion 522 are attached by a snap fit (a method utilizing elastic deformation).

By the way, in the present embodiment, as described above, the absorber spring 53 is in a state of being compressed more than its natural length in a normal state. Therefore, a force is always generated in the direction in which the shaft main body portion 521 is released from the upward movement restricting portion 522.

In this respect, in the present embodiment, the size of the distance between the side surface of the upper movement restricting portion 522 and the lower large diameter portion 511C is the locked head along the direction orthogonal to the central axis of the support shaft 52. It is set to be smaller than the length of the locking allowance of the claw portion 522C with respect to the portion 521D. Therefore, even if the side wall portion 522B is deformed in the direction in which the distance between both claws 522C is widened by the compression repulsive force generated by the absorber spring 53, the amount of deformation at this time is the side surface and the lower side of the upward movement restricting portion 522. It is limited to those smaller than the size of the distance between the large diameter portion 511C and the large diameter portion 511C. Therefore, the state in which the claw portion 522C is locked with respect to the locked head portion 521D can be maintained more reliably, and the compression repulsive force generated by the absorber spring 53 causes the upward movement restricting portion 522 to the shaft main body portion. It is possible to more reliably prevent the 521 from coming off.

Further, the upper movement restricting portion 522 has a chamfered chamfered portion 522D at a portion from the upper surface to the side surface located on the overhanging portion 511B side. In the present embodiment, the chamfered portion 522D has a tapered surface shape in which the outer diameter gradually increases from the top to the bottom.

Further, the shock absorber 8 is configured such that the support shaft 52 (upward movement restricting portion 522 or the like) protrudes from the lower end of the tubular portion 511 in a state where the shock absorber function is exhibited (FIG. FIG. See 5 mag).

As described in detail above, according to the present embodiment, the absorber spring 53 is in a state of being sandwiched between the overhanging portion 511B that supports the first supported portion 521F and the second supported portion 521E. .. Therefore, as a result, a large distance between both supported portions 521E and 521F can be secured, and by extension, both supported portions 521E and 521F in a state of being greatly separated can be supported by the tubular portion 511. As a result, the support shaft 52 can be supported in a stable state and in a state of little inclination. As a result, the shock absorber function can be more reliably exerted. Further, the inclination of the stopper lid 55 can be effectively suppressed, and the water stopping property and the appearance quality can be improved.

In particular, in the present embodiment, when the shock absorber function is exerted, the support shaft 52 protrudes downward from the lower end of the tubular portion 511. Therefore, the overhanging portion 511B and thus the first supported portion 521F supported by the overhanging portion 511B can be provided near the lower end portion of the tubular portion 511, and both supported portions 521E, with respect to the total length L of the tubular portion 511, The ratio of the distance between 521F can be made remarkably large. That is, both supported portions 521E and 521F are arranged in the tubular portion 511, respectively, and the distance between both supported portions 521E and 521F can be increased or decreased only within a limited range of the total length L of the tubular portion 511. Therefore, it is possible to secure a very large distance between both supported portions 521E and 521F within this limited range. Therefore, both supported portions 521E and 521F in a state of being farther apart can be supported by the cylindrical portion 511. As a result, the support shaft 52 can be supported in a more stable state and in a state of less inclination. As a result, the shock absorber function can be more reliably exerted. Further, the inclination of the stopper lid 55 can be suppressed more effectively, and the water stopping property and the appearance quality can be further improved.

Further, since the distance between the supported portions 521E and 521F can be increased, the absorber spring 53 can be made sufficiently long, and thus a large amount of compression deformation can be secured in the absorber spring 53. Therefore, the shock absorber function can be more reliably and effectively exerted, and damage or deformation of various members such as the support shaft 52 and the vertical moving portion 43 can be prevented more reliably.

In addition, the support shaft 52 is in a state in which the second supported portion 521E is supported by the overhanging portion 511B via the absorber spring 53, so that the support shaft 52 does not come off from the lower opening of the cylindrical portion 511 and is stretched. Since the upper movement restricting portion 522 comes into contact with the protruding portion 511B, it does not come out of the upper opening of the tubular portion 511. Therefore, it is possible to reliably prevent the support shaft 52 from falling off from the cylindrical portion 511. As a result, it is possible to improve the convenience of handling the drain plug device 1 during installation work, cleaning, and the like. In addition, the operational stability of the drain plug device 1 can be improved.

Further, conventionally, in order to prevent the support shaft from coming off from the tubular portion, a method of providing an inwardly projecting portion on the upper portion of the tubular portion is adopted, but according to the present embodiment, the tubular portion 511 Taking advantage of the fact that it is not necessary to have such a shape, the shape of the inner surface of the cylindrical portion in the axially orthogonal cross section of the tubular portion 511 is made constant over the entire area above the overhanging portion 511B. Therefore, it is not necessary to make the support shaft 52 thinner corresponding to the protrusion as in the conventional case, and the support shaft 52 can be made thicker as a whole. As a result, the strength of the support shaft 52 can be improved. Further, the support shaft 52 can be supported more stably by the cylindrical portion 511, and the inclination of the support shaft 52 can be suppressed more reliably.

In addition, when the conventional protrusion is provided, the thickness of the tubular portion is the thickness of the tubular portion, the thickness of the support shaft, the size of the gap between the tubular portion (projection) and the support shaft. In addition, the thickness of the tubular portion 511 is the thickness of the tubular portion 511 because the protrusion is unnecessary according to the present embodiment, while it is based on the amount of protrusion of the protrusion inward. It is based on the thickness of the support shaft 52 and the size of the gap between the cylindrical portion 511 and the support shaft 52. Therefore, the cylindrical portion 511 can be made relatively thin while the support shaft 52 is made thick to improve the strength. As a result, it is possible to secure a larger water flow area in the drainage flow path and improve the drainage capacity. In addition, costs related to manufacturing and the like (for example, material costs and the like) can be reduced.

At the same time, the second supported portion 521E becomes longer along the axial direction of the support shaft 52 when the shock absorber function is exerted, as compared with when the shock absorber function is not exerted. .. That is, when a downward force is applied to the stopper lid 55 and the support shaft 52 moves downward, a wider area of the support shaft 52 is guided by the cylindrical portion 511. As a result, the support shaft 52 can be moved more smoothly along the axial direction, and the absorber spring 53 can be compressed and deformed more smoothly. As a result, the shock absorber function can be exerted more effectively.

Further, the portion of the upper movement regulating portion 522 from the upper surface to the side surface thereof is a chamfered portion 522D. Therefore, during handling such as during mounting work or cleaning, the compression repulsive force generated by the absorber spring 53 may cause a finger or the like to be pinched between the upper movement restricting portion 522 and the lower end portion of the tubular portion 511. It can be prevented more reliably. As a result, convenience and safety during handling can be further enhanced.

In addition, in a state where the shock absorber function is not exhibited, the upper movement restricting unit 522 is accommodated in the accommodating unit 511D. Therefore, the aesthetic appearance of the drain plug device 1 can be improved. In addition, it is possible to suppress the adhesion of foreign substances such as dust and hair to the upper movement control unit 522, and it is possible to improve hygiene and cleanability.

Further, in a state where the upper movement restricting portion 522 is accommodated in the accommodating portion 511D, the lower end surface of the upper movement restricting portion 522 and the lower end surface of the cylindrical portion 511 are flush with each other, so that the drain plug device 1 is aesthetically pleasing. Can be made even better. Further, at the time of cleaning, the lower end surface of the upward movement restricting portion 522 and the lower end surface of the tubular portion 511 can be wiped or rubbed at the same time, so that the cleaning property can be further improved.

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) In the above embodiment, when the shock absorber function is exerted, the support shaft 52 is configured to protrude downward from the lower end of the cylindrical portion 511, but the shock absorber function is exerted. Even when (that is, always), the support shaft 52 may be configured so as not to protrude downward from the lower end of the cylindrical portion 511. In this case, the upward movement restricting unit 522 is always arranged in the accommodating unit 511D.

Further, the support shaft 52 may be configured to always protrude downward from the lower end of the tubular portion 511.

(B) In the above embodiment, the plug lid side drive unit 4 is configured to have a columnar vertical moving portion 43 projecting from one end surface of the rotating portion 41, but the plug lid side drive unit is configured. , Not limited to this. Therefore, the plug lid side drive unit is configured to have a rod-shaped vertical movement portion that protrudes from the outer periphery of the rotating portion and is arranged in the drain pipe 3, and the vertical movement portion moves up and down as the rotating portion rotates. By doing so, the stopper lid 55 may be moved up and down.

Further, the plug lid side drive unit may be configured by a mechanism having a rod-shaped vertical movement portion that can move up and down, which is arranged in the drain port member 2 and the drain pipe 3. In this case, the vertically moving portion moves the stopper lid 55 upward by pushing up the support member 51 (for example, the tubular portion 511) from below as it moves upward. It is preferable to configure the vertical movement portion so that when the shock absorber function is exerted and the support shaft 52 moves downward, the support shaft 52 is not pressed in contact with the lower portion of the support shaft 52. This configuration can be realized, for example, by providing a recess in the upper part of the vertically moving portion where the lower part of the support shaft 52 is arranged when the shock absorber function is exerted and the support shaft 52 moves downward.

(C) In the above embodiment, the support shaft 52 is configured such that the upper movement restricting portion 522 is attached to the lower portion of the shaft main body portion 521. For example, the support shaft constitutes the large diameter portion 521A. It may be composed of a member and a member constituting a small diameter portion 521B and an upward movement restricting portion 522, which are connected in series with the member by, for example, screwing.

(D) In the above embodiment, the drain port 104 is closed when the plug lid 55 (packing portion 55B) comes into contact with the bottom surface portion 101, but the plug lid 55 (packing portion 55B) is used. The drainage port 104 may be closed by coming into contact with the drainage port member 2. Of course, the configuration of the hair catcher 54 and the like may be appropriately changed according to the change in the configuration.

(E) 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 bathtub, a kitchen sink, or the like.

1 ... Drain plug device, 43 ... Vertical movement part, 51 ... Support member, 52 ... Support shaft, 53 ... Absorber spring, 55 ... Plug lid, 100 ... Wash bowl (tank body), 104 ... Drain port 511 ... Cylindrical Part 511B ... Overhanging part 511D ... Accommodating part 521E ... Second supported part 521F ... First supported part 521G ... Intermediate part 522 ... Upward movement regulation part 522D ... Chamfering part.

Claims (6)

A stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion .
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
A drain plug device characterized in that the inner surface shape of the tubular portion in an axially orthogonal cross section of the tubular portion is constant over the entire area above the overhanging portion. The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The drain plug device according to claim 1 , wherein the upward movement restricting portion has a chamfered portion having a chamfered shape at a portion from the upper surface to the side surface located on the overhanging portion side. A stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion.
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The upper movement restricting portion is a drain plug device having a chamfered portion having a chamfered shape at a portion from the upper surface to the side surface located on the overhanging portion side. The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The cylindrical portion, in a state of not being exhibited at least the shock Healing Conduit function, according to any one of claims 1 to 3, characterized in that it has a housing portion which the upper movement restricting portion is accommodated Drain plug device. A stopper lid for opening and closing the drainage port provided on the tank body,
A support shaft with the stopper lid attached to the upper end,
A support member having a cylindrical portion arranged on the outer circumference of the support shaft, and
A vertically moving part that is configured to be movable up and down and supports the support member,
It is provided with an absorber spring which is arranged in the cylindrical portion and can be elastically deformed along the axial direction of the support shaft.
The support member and the support shaft move upward with the upward movement of the vertical moving portion, so that the drainage port is opened, and at least when the drainage port is open, the drainage port is directed downward with respect to the plug lid. A drain plug device configured to exert a shock absorber function by compressing and deforming the absorber spring when a force is applied.
The tubular portion has an overhanging portion on its inner surface that projects toward the side surface of the support shaft.
The side surface portion of the support shaft
A first supported portion arranged along the inner surface of the overhanging portion,
A second supported portion located above the first supported portion and arranged along the inner surface of the cylindrical portion, and a second supported portion.
It is located between the first supported portion and the second supported portion, and has an intermediate portion in which the absorber spring is arranged on its outer circumference.
The absorber spring is in a state of being sandwiched between the overhanging portion and the second supported portion.
The support shaft is located on the side opposite to the absorber spring with the overhanging portion sandwiched in the axial direction thereof, and also has an upward movement restricting portion that protrudes outward and contacts the overhanging portion. Have and
The drainage plug device is characterized in that the tubular portion has an accommodating portion in which the upward movement restricting portion is accommodated, at least in a state where the shock absorber function is not exhibited. It is characterized in that the lower end surface of the upper movement restricting portion and the lower end surface of the tubular portion are flush with each other in a state where the upper movement restricting portion is accommodated in the accommodating portion. The drain plug device according to claim 4 or 5.

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