JP7187009B2 - drain plug device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drain plug device having a plug lid capable of opening and closing a drain port of a tank body.

A drain plug device is provided with a plug cover provided at a drain port of a bath (for example, a bathtub or a washbowl), and the drain port is opened and closed by moving the plug cover up and down.

As a drain plug device, a flow path forming part that constitutes a flow path for drainage flowing through a drain (for example, a tubular drain port member that is inserted into the drain port, a pipe that is connected in series with the drain port member, etc.) ), a support shaft mechanism having a rod-shaped support shaft that supports the plug lid in a vertically movable state, and an attachment for holding the support shaft mechanism inside the flow path structure part It is generally known to have a member and a transmission member (e.g., wire, etc.) that can reciprocate in accordance with the displacement (operation) of a predetermined operation part (e.g., operation button, operation handle, etc.) (see, for example, patent documents 1st prize). In such a drain plug device, the transmission member reciprocates as the operating portion is displaced, so that the support shaft and the plug cover move up and down, thereby switching the open/closed state of the drain port.

In addition, the attachment member is provided with a support projection protruding inward on the inner periphery of the lower portion, and the support shaft mechanism is held on the inner periphery in a state in which the support shaft mechanism is supported by the support projection. , an outer ring portion that is annular as a whole and attached to the inner surface of the flow path forming portion, and a connecting portion that connects the holding portion and the outer ring portion (see, for example, Patent Document 2). . The holding portion is provided with a slit that opens at the lower end, and by widening the slit, the lower opening of the holding portion can be enlarged.

JP 2016-132897 A JP 2007-327311 A

Conventionally, as a method of arranging the support shaft mechanism in the holding portion, the width of the slit is widened to enlarge (while opening) the lower opening of the holding portion, and the support shaft mechanism is inserted into the holding portion through the enlarged lower opening. or by pushing the support shaft mechanism into the holding portion from the lower opening side of the holding portion, the lower opening is enlarged (the width of the slit is widened), and finally the enlarged lower opening is obtained. There is known a method of inserting the support shaft mechanism into the holding portion through the hole. According to these methods, by enlarging the lower opening of the holding portion, the supporting shaft mechanism can pass through the supporting protrusion relatively easily, so that the supporting shaft mechanism can be easily arranged (inserted) into the holding portion. can be done. Accordingly, it is possible to obtain sufficiently good mounting workability, but on the other hand, there is also a demand to further improve the mounting workability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drain plug in which a support shaft mechanism can be more easily arranged in a holding portion and extremely excellent mounting workability can be obtained. It is to provide a device.

Each means suitable for solving the above object will be described below by itemizing. It should be noted that actions and effects peculiar to the corresponding means will be added as necessary.

Means 1. A stopper lid for opening and closing a drain port provided in the tank body;
a flow path forming part, the inside of which forms a flow path for the drainage flowing through the drainage port;
a support shaft mechanism having a rod-shaped support shaft that supports the plug lid at its upper end and is capable of vertically moving the plug lid by its own vertical movement;
A cylindrical holding part having a support projection protruding inward on the inner circumference of the lower part and holding the support shaft mechanism on the inner circumference in a state where the support shaft mechanism is supported by the support projection, and the holding part An annular outer ring portion that is provided outside and attached to the inner surface of the flow path forming portion, and a connecting portion that connects the holding portion and the outer ring portion, and is provided within the flow path forming portion. and an attachment member that is
A drain plug device configured to switch between open and closed states of the drain port by vertical movement of the support shaft,
The holding part has a slit that opens at the lower end,
When the attachment member deforms the outer ring portion by pressing two points on the outer peripheral surface of the outer ring portion with the holding portion therebetween toward the holding portion side in a plan view, the outer ring portion is deformed. A portion of the annular portion that is connected to the connecting portion deforms in a direction away from the central axis of the holding portion, and as a result, the connecting portion moves and the slit widens, so that the lower portion of the holding portion It is configured so that the opening expands,
The holding part protrudes inward and has a retaining protrusion for preventing the support shaft mechanism from coming off from the upper opening,
The slit is provided at a position corresponding to the formation range of the retaining projection along the circumferential direction of the holding part, and the upper end of the slit is configured to extend to the retaining projection or to the immediate vicinity of the retaining projection. A drain plug device characterized by:

According to the above means 1, when the outer ring portion is deformed by pressing two points on the outer peripheral surface of the outer ring portion interposed between the holding portions in plan view toward the holding portion side, the outer ring portion is deformed. Among them, the portion connected to the connecting portion deforms in a direction away from the central axis of the holding portion. As the outer ring portion deforms, the connecting portion moves and the width of the slit widens, thereby enlarging the lower opening of the holding portion. In short, the attachment member is configured to expand the lower opening of the holding portion by pressing the outer ring portion. Therefore, the support shaft mechanism can be more easily arranged (inserted) in the holding portion through the enlarged lower opening while pressing the outer ring portion to enlarge the lower opening of the holding portion. As a result, very excellent mounting workability can be obtained.

In addition, according to the above means 1, the upper end of the slit is configured to extend to the retaining protrusion or to the immediate vicinity of the retaining protrusion, and has a shape that does not open at the upper end of the holding section. Therefore, the upper part of the holding part is in a state of continuous ring, and the diameter of the upper opening of the holding part cannot be expanded. As a result, the function of preventing the support shaft mechanism from coming off by the coming off-preventing protrusion can be exhibited more effectively.

On the other hand, if the slit has a shape that does not open at the upper end of the holding portion, a load is applied to a portion of the holding portion corresponding to the upper end of the slit when the slit is widened. According to this, the retaining projection is formed at a portion of the holding portion corresponding to the upper end of the slit. Therefore, the part of the holding part corresponding to the upper end of the slit can be made sufficiently thick to be in a state of excellent strength, and the holding part can be prevented from being damaged when the slit is widened by pressing and deforming the outer ring part. This can be prevented more reliably. As a result, durability and handleability can be improved.

Note that "the upper end (the upper end of the slit) extends to the immediate vicinity of the retaining protrusion" means, for example, the distance from the upper end of the slit along the vertical direction (the central axis direction of the holding part) to the retaining protrusion. is 3 mm or less (more preferably 2 mm or less).

Means 2. Only two connecting portions are provided in a positional relationship that sandwiches the holding portion when viewed from above,
The drain plug device according to Means 1, wherein the slits are provided at two locations respectively located in the center of the two connecting portions along the circumferential direction of the holding portion.

According to the above means 2, only two connecting portions are provided in a positional relationship that sandwiches the holding portion when viewed from above, and the slit is positioned at the center of the two connecting portions along the circumferential direction of the holding portion. It is provided in each of the two locations. Therefore, when the outer ring portion is pressed and deformed, the moving direction of the connecting portion can be the same as the width direction of the slit, and the width of the slit can be expanded very efficiently when the outer ring portion is pressed and deformed. be able to. In addition, the lower part of the holding part is composed of two parts separated by the slit, and when the outer ring part is pressed and deformed, these two parts are moved away from each other. can be made Therefore, when the outer ring portion is press-deformed, the lower opening of the holding portion can be expanded over its entire area. As a result, the support shaft mechanism can be arranged (inserted) in the holding portion more easily, and a more excellent mounting workability can be obtained.

Moreover, according to the above means 2, since only two connecting portions are provided, it is possible to secure a larger area (water flow area) of the drainage channel formed between the holding portion and the outer ring portion. , the drainage capacity can be improved.

Means 3 . The support shaft mechanism includes a cylindrical case portion that holds the support shaft on its inner circumference in a vertically movable state,
Means 1, characterized in that a cylindrical insertion guide portion that forms the lower opening and allows the case portion to be inserted is provided below the support projection in the holding portion; or 2. The drain plug device according to 2 .

According to the means 3 , a cylindrical insertion guide portion through which the case portion can be inserted is provided at the lower portion of the holding portion. Therefore, when disposing (inserting) the support shaft mechanism into the holding portion, the holding portion and the support shaft mechanism can be easily arranged in a straight line by inserting the case portion into the insertion guide portion. It becomes possible. That is, it is possible to easily set the relative positional relationship between the holding portion and the support shaft mechanism to the most suitable state for inserting the support shaft mechanism into the holding portion. Therefore, it is possible to more easily dispose (insert) the support shaft mechanism into the holding portion, and further improve the mounting workability.

It is more preferable that the insertion guide portion has an inner diameter substantially equal to the outer diameter of the case portion when the lower opening of the holding portion is not enlarged. In this case, the case portion can be inserted into the insertion guide portion without enlarging the lower opening of the holding portion, and the holding portion and the support shaft mechanism can be arranged linearly more easily. becomes. Thereby, mounting workability can be further improved. The term "substantially the same" does not only mean that there is a slight difference between the inner diameter of the insertion guide portion and the outer diameter of the case portion (for example, 2 mm or less, more preferably 1 mm or less). The purpose is to include cases where there is a difference in diameter.

Means 4 . The drain plug device according to means 3 , wherein the support protrusion has a diameter-reducing surface that continues to the inner peripheral surface of the insertion guide portion and whose inner diameter gradually decreases upward.

According to the means 4 , when the support shaft mechanism is arranged (inserted) into the holding portion, the support shaft mechanism is brought into contact with the diameter-reduced surface of the supporting protrusion and pushed into the holding portion. , the lower opening of the holding portion can be enlarged. Here, by pressing the outer ring portion to expand the lower opening of the holding portion and pushing the support shaft mechanism toward the inner side of the holding portion, the pushing force applied to the support shaft mechanism is not so large. , the lower opening of the holding part can be widened. Therefore, according to the means 4 , the outer ring portion can be pressed to enlarge the lower opening of the holding portion, and the support shaft mechanism can be arranged (inserted) into the holding portion very smoothly. can. As a result, mounting workability can be further improved.

Means 5 . The support shaft has an upper portion protruding from the case,
In a state in which the case portion is inserted into the insertion guide portion so as to dispose the support shaft mechanism in the holding portion, the upper portion of the support shaft is configured to be in a state of being close to or in contact with the inner surface of the support projection. The drain plug device according to means 3 or 4 , characterized in that:

Incidentally, "the state in which the upper part of the support shaft is close to the inner surface of the supporting projection" means, for example, a state in which the upper part of the supporting shaft is slightly (for example, 1 mm or less) away from the inner surface of the supporting projection. .

According to the means 5 , when the case portion is inserted into the insertion guide portion, the upper portion of the support shaft comes close to or contacts the inner surface of the support projection. Therefore, in a state in which the case portion is inserted into the insertion guide portion, the support shaft mechanism can be supported by both the supporting projection and the insertion guide portion. It can be maintained stably. As a result, it is possible to further facilitate the disposition (insertion) of the support shaft mechanism into the holding portion, thereby further enhancing the mounting workability.

It is a cross-sectional view of the drain plug device. Fig. 3 is a perspective view of the stopper lid; Fig. 3 is a perspective view of a plug lid main body; It is a perspective view of an attachment member. It is a top view, such as an attachment member. FIG. 6 is a cross-sectional view taken along line JJ in FIG. 5, omitting a bathtub and the like; FIG. 10 is a perspective view of the attachment member for explaining that the lower opening of the holding portion is enlarged by pressing the outer ring portion; 4 is a partially cutaway front view of an attachment member and the like showing a state in which the case portion is inserted through the insertion guide portion when disposing the support shaft mechanism in the holding portion; FIG.

An embodiment will be described below with reference to the drawings. As shown in FIG. 1, the drain plug device 1 is attached to a bathtub 100 as a tub body. The bathtub 100 has a bottom portion 101 forming a bottom surface thereof, and a drain port 102 is formed through the bottom portion 101 .

The drain plug device 1 includes a drain port member 2 , a pipe 3 , an attachment member 4 , a support shaft mechanism 5 and a plug lid 6 .

The drain port member 2 is formed in a cylindrical shape, and is inserted into the drain port 102 so that the center axis of the drain port member 2 and the center axis of the drain port 102 are substantially aligned. Further, the drain port member 2 includes a flange portion 21 protruding radially outward at its upper end portion, and a male thread portion 22 formed on the outer periphery below the flange portion 21 .

Further, on the inner periphery of the drain port member 2, a mounting projection 23 projecting inward and a mounting recess (not shown) recessed outward are provided. are alternately formed along the circumferential direction. The attachment protrusion 23 and the attachment recess function as the attached portion of the attachment member 4 .

The pipe 3 has a bent tubular shape, and has a female threaded portion 31 into which the male threaded portion 22 can be screwed on the inner circumference of one end (upper end) thereof. Then, while inserting the drain port member 2 into the drain port 102, the male screw portion 22 is screwed into the female thread portion 31, and the bottom surface portion 101 is sandwiched between the flange portion 21 and the upper end surface of the pipe 3, whereby the drain port member 2 and the pipe are inserted. 3 are connected and both are attached to the bathtub 100 .

In this embodiment, an annular seal member 7 made of an elastically deformable material (for example, resin or rubber) is arranged between the upper end surface of the pipe 3 and the back surface of the bottom surface portion 101. there is The seal member 7 prevents water leakage from between the drain port member 2 and the pipe 3 and the bathtub 100 .

Further, in the present embodiment, the interior of the drain port member 2 and the pipe 3 constitutes a channel for the waste water that flows through the drain port 102 . Therefore, in the present embodiment, the drain port member 2 and the pipe 3 constitute the flow path forming portion 8 .

The attachment member 4 is for holding the support shaft mechanism 5 in the drainage channel, and is arranged inside the channel forming portion 8 . The configuration of the attachment member 4 will be detailed later.

The support shaft mechanism 5 is for moving the cap 6 up and down, and includes a cylindrical case portion 51 and a rod-shaped (columnar) support shaft 52 . The case portion 51 is held in a vertically immovable state by the attachment member 4 (holding portion 43 to be described later) arranged on the outer periphery thereof. On the other hand, the case portion 51 holds the support shaft 52 on its inner circumference in a vertically movable state.

The upper portion of the support shaft 52 protrudes from the case portion 51 and supports the cap 6 at the upper portion. The vertical movement of the support shaft 52 makes it possible to move the plug lid 6 up and down. However, in this embodiment, the upper part of the support shaft 52 is not attached to the plug lid 6, and is configured so that the plug lid 6 can be placed thereon at least when the drain port 102 is in the open state. . When the drain port 102 is in the closed state, the later-described packing portion 62 comes into contact with the drain port member 2, so that the upper portion of the support shaft 52 is separated (floated) from the stopper lid 6. is configured to As a result, the packing part 62 can be brought into close contact with the drain port member 2 more reliably, and good water stopping performance can be obtained.

In addition, the support shaft 52 is configured so that an end portion of a transmission member 9 (for example, a metal wire) for transmitting driving force due to displacement of an operation portion (for example, a push button) (not shown) can come into contact. . The transmission member 9 is arranged so as to be reciprocatable on the inner periphery of the cylindrical tube member 10 . By locking the transmission member 9 forward (moving from the operation section side to the support shaft mechanism 5 side) in the operation device (not shown) including the operation section, the support shaft 52 A lock mechanism (for example, a thrust lock mechanism) (not shown) for locking the is provided.

Further, an absorber spring 53 is arranged inside the support shaft 52 . The absorber spring 53 is configured to prevent an excessive load from being applied to the transmission member 9, the attachment member 4, and the like when a large downward force is applied to the plug lid 6, such as when the plug lid 6 is stepped on. there is 1 shows only cross sections of the absorber spring 53 and the return spring 54, which will be described later.

A return spring 54 is provided between the case portion 51 and the support shaft 52 to apply a downward force to the support shaft 52 .

In this embodiment, when the transmission member 9 moves forward by operating (for example, pressing) the operation portion, the support shaft 52 is pushed up by the transmission member 9 against the force from the return spring 54 . When the operation of the operation portion is released with the support shaft 52 sufficiently moved upward, the transmission member 9 is locked in the forward movement state by the lock mechanism while the support shaft 52 is lowered slightly. be. As a result, the support shaft 52 is locked while being moved upward.

On the other hand, when the operation portion is operated again in this state, the transmission member 9 moves forward again, and the locking of the transmission member 9 by the locking mechanism is released. When the operation of the operation portion is released, the support shaft 52 is moved downward by the biasing force of the return spring 54 . Further, the transmission member 9 moves back as the support shaft 52 moves downward.

As described above, in this embodiment, each time the operating portion is operated, the locking of the support shaft 52 in the upper position and the downward movement of the support shaft 52 accompanying the unlocking of the transmission member 9 are alternately performed. A lock mechanism for locking the support shaft 52 may be provided in the support shaft mechanism 5 .

The plug lid 6 is a plug for opening and closing the drain port 102 . As shown in FIG. 2, the plug lid 6 includes a plug lid main body portion 61 made of resin or the like, an annular packing portion 62 made of an elastically deformable material (for example, resin or rubber), and a passage forming portion. A rectifying member 63 is provided for adjusting the flow and flow rate of the waste water flowing into 8.

In this embodiment, the support shaft 52 and the stopper lid 6 are moved upward as the operating portion is operated, and the packing portion 62 is separated from the drain port member 2, thereby opening the drain port 102. (see Figure 1). On the other hand, in this state, the support shaft 52 moves downward as the operating portion is operated, and the entire outer peripheral portion of the packing portion 62 comes into contact with the drain port member 2 , thereby closing the drain port 102 .

The plug lid 6 is configured to have a specific gravity greater than 1 (that is, to be submerged in water) so that the drain port 102 can be closed only by its own weight.

As shown in FIG. 3, the stopper body 61 includes a disk-shaped base 611, and an outer cylindrical portion 612 and an inner cylindrical portion 613 projecting downward from the back surface of the base 611, respectively. The outer cylindrical portion 612 is a portion to which the packing portion 62 and the rectifying member 63 are attached.

The inner tubular portion 613 is a tubular portion positioned outside the support shaft 52 and inside the outer tubular portion 612 . The inner cylindrical portion 613 includes a root-side cylindrical portion 613A formed concentrically with the outer cylindrical portion 612, and a plurality of leg portions 613B extending downward from the tip (lower end) of the root-side cylindrical portion 613A. there is A plurality (four in this embodiment) of the leg portions 613B are provided at regular intervals along the circumferential direction of the root-side cylindrical portion 613A, and are arranged on the outer periphery of the holding portion 43 . The leg portion 613B moves along the outer circumference of the holding portion 43 as the support shaft 52 moves up and down. It is preventable.

In addition, an inward protrusion 613C that protrudes inward (toward the center of the inner cylindrical portion 613) is provided on the inner periphery of the tip (lower end) of each leg portion 613B. The inward protrusion 613</b>C is provided to prevent the plug lid 6 (the inner cylindrical portion 613 ) from coming off from the holding portion 43 .

Further, each leg portion 613B is arranged between connecting portions 42 to be described later when the drain port 102 is in the open state. By arranging each leg portion 613B between the connecting portions 42, relative rotation of the plug lid 6 with respect to the flow path forming portion 8 can be restricted.

As shown in FIG. 2 , the rectifying member 63 has an annular mounting portion 631 , and the mounting portion 631 is fitted on the outer circumference of the outer cylindrical portion 612 to be arranged on the back side of the stopper lid 6 . . In this embodiment, the mounting portion 631 prevents the packing portion 62 from falling off from the outer cylindrical portion 612 .

In addition, the rectifying member 63 is provided with a plurality of blades 632 equidistantly along its circumferential direction, and the flow and flow rate of the waste water flowing into the flow path forming portion 8 are adjusted by hitting the waste water against these blades 632. It is possible.

Next, the configuration of the attachment member 4 will be described. The attachment member 4 is made of a predetermined elastically deformable resin or the like, and includes an outer ring portion 41, a connecting portion 42, and a holding portion 43, as shown in FIG.

The outer ring portion 41 has an annular shape in plan view, and functions as a mounting portion of the attachment member 4 to the flow path forming portion 8 (drain port member 2). A plurality of recesses 411 are provided in the lower portion of the outer ring portion 41 at intervals along the circumferential direction of the outer ring portion 41 , and a plurality of protrusions 412 are formed on the outer periphery of the outer ring portion 41 . A plurality of them are provided at intervals along the circumferential direction of the ring portion 41 . By arranging the mounting projection 23 of the drain port member 2 in the recess 411 and arranging the projection 412 in the mounting recess of the drain port member 2, the outer ring portion 41 and the attachment member 4 is attached to the inner surface of the flow path forming portion 8 (drain port member 2).

The connecting portion 42 is a portion that connects the inner peripheral surface of the outer ring portion 41 and the outer peripheral surface of the holding portion 43 . The connecting portions 42 extend radially outward of the holding portion 43 from the outer periphery of the holding portion 43. In the present embodiment, only two connecting portions 42 are provided so as to sandwich the holding portion 43 in plan view. (See FIG. 5. In FIG. 5, the support shaft mechanism 5, the cap 6, etc. are not shown). In addition, the drainage that has flowed into the flow path forming portion 8 flows downstream through the gaps between the connecting portions 42 .

Each connecting portion 42 includes a plate-like connecting base portion 421 and a reinforcing portion 422 .

The connecting base portion 421 has an inclined plate shape that gradually displaces from top to bottom toward one side in the circumferential direction of the holding portion 43, and the width of the upper surface thereof is very small in consideration of aesthetic improvement. (For example, it is 3 mm or less, more preferably 2 mm or less). In addition, one side surface of the connecting base portion 421 (the surface that hangs down from the edge of the upper surface of the connecting base portion 421) is an inclined surface that is configured to be gradually displaced downward from above toward one side in the circumferential direction of the holding portion 43. It is shaped like a water flow generating surface 421A that faces obliquely upward.

The water flow generation surface 421A is for receiving the water flowing down and flowing it toward the inner surface side of the flow path forming part 8. It is possible to generate a directional water flow) and a water flow (spiral flow) that flows in a rotating direction on the inner surface of the flow path forming portion 8 . By generating such a water flow, adhesion of dirt and foreign matter to the inner surface of the flow path forming portion 8 can be effectively suppressed. However, these can be effectively washed away.

The reinforcing portion 422 is for increasing the rigidity (strength) of the connecting portion 42 . The reinforcing portion 422 has a plate shape extending in the vertical direction, and is connected to the upper portion of the side surface of the connecting base portion 421 located behind the water flow generating surface 421A and the outer peripheral surface of the holding portion 43 . Further, the reinforcing portion 422 is provided at a position hidden by the water flow generation surface 421A when viewed in plan, and is invisible in plan view in this embodiment (see FIG. 5). As a result, it is possible to more reliably suppress deterioration in appearance due to the presence of the reinforcing portion 422 .

Further, the outermost portion of the reinforcing portion 422 is in contact with or close to the mounting protrusion 23 . Therefore, when a large downward force is applied to the stopper lid 6, the reinforcing portion 422 can more reliably prevent the lower opening of the holding portion 43 from widening. This more reliably prevents the support shaft mechanism 5 from falling off from the holding portion 43 .

The holding portion 43 is for holding the support shaft mechanism 5 on its inner periphery in a state where the support shaft mechanism 5 is supported by the supporting projections 433 described later. The holding portion 43 has a cylindrical shape as a whole and is provided coaxially with the outer ring portion 41 inside the outer ring portion 41 .

As shown in FIGS. 4 and 6 (FIG. 6 is a cross-sectional view taken along line JJ in FIG. 5 with the bathtub 100 and the like omitted), the holding portion 43 has an outward protrusion 431 on its outer periphery. It has a retaining projection 432 and a supporting projection 433 on its inner periphery.

The outward protrusion 431 is for preventing the plug lid 6 (the inner cylindrical portion 613) from coming off from the holding portion 43 by coming into contact with the inward protrusion 613C. The outward projecting portion 431 is provided on the outer periphery of the upper portion of the holding portion 43 and has a projecting shape extending along the circumferential direction of the holding portion 43 . In this embodiment, two outward protrusions 431 are provided, and each outward protrusion 431 is provided corresponding to a portion of the holding portion 43 other than the connection portion with the connection portion 42 when viewed from above. It is That is, a gap is formed between the outward projections 431 , and the gap is positioned vertically above the connecting portion 42 .

In this embodiment, as described above, when the drain port 102 is in the open state, the legs 613B are arranged between the connecting portions 42. The leg portion 613B is not arranged on the outer surface, and thus the gap between the outward protrusions 431 and the inward protrusion 613C do not overlap when viewed from above. Therefore, all the inward projections 613C overlap the outward projections 431 when viewed from the top, and the plug lid 6 (the inner cylindrical portion 613) is effectively prevented from coming off from the holding portion 43. It will happen.

The retaining projection 432 is for preventing the support shaft mechanism 5 from coming off from the upper opening of the holding portion 43 . The retaining protrusion 432 is provided on the inner periphery of the upper portion of the holding section 43 and has a protrusion shape that protrudes inward. In the present embodiment, the retaining protrusions 432 are provided at two locations in the holding portion 43 that are positioned at the center of the two connecting portions 42 when viewed from above.

The support projection 433 is for supporting the lower portion of the support shaft mechanism 5 . The supporting protrusion 433 is provided on the inner periphery of the lower portion of the holding portion 43 and has a shape protruding inward. In the present embodiment, the supporting projections 433 are provided at positions corresponding to the positions where the two connecting portions 42 are formed in the holding portion 43 in plan view. That is, the supporting protrusion 433 is provided on the back side of the portion of the holding portion 43 to which the connecting portion 42 is connected when viewed from above.

Further, the lower surface of the supporting protrusion 433 is a reduced diameter surface 433A whose inner diameter gradually decreases upward. In the present embodiment, the diameter-reduced surface 433</b>A has an inclined shape that gradually approaches the central axis CL toward the upper side in a cross section including the central axis CL of the holding portion 43 . Of course, in the cross section, the reduced diameter surface 433A may be configured to have a curved shape that gradually approaches the central axis CL upward.

On the other hand, the upper surface of the supporting projection 433, that is, the surface that contacts and supports the support shaft mechanism 5 extends in a direction (horizontal direction) orthogonal to the central axis CL of the holding portion 43 except for the outermost portion. It is considered to be a shape. Thus, the support shaft mechanism 5 (case portion 51) can be stably supported by the support projections 433. As shown in FIG.

In addition, the inner surface of the supporting projection 433 (the surface positioned between the upper surface and the lower surface of the supporting projection 433 and facing the central axis CL side of the holding portion 43) is the central axis CL in a cross section including the central axis CL. It is configured to have a shape extending parallel to the

Further, the holding portion 43 has a cylindrical insertion guide portion 434 below the supporting protrusion 433 . The insertion guide portion 434 is provided at the lowest portion of the holding portion 43 and forms a lower opening of the holding portion 43 . The insertion guide portion 434 has an inner diameter substantially equal to the outer diameter of the case portion 51 in a state in which the lower opening is not enlarged, so that the case portion 51 can be inserted therethrough. Further, the inner peripheral surface of the insertion guide portion 434 is continuous with the reduced diameter surface 433A.

In addition, the holding portion 43 has a slit 435 that extends along the direction of the central axis CL and opens at the lower end. Only two slits 435 are provided in a positional relationship that sandwiches the central axis CL of the holding portion 43 . It is provided in two places located in As a result, the slit 435 is provided at a position corresponding to the formation range of the outward protrusion 431 and the retaining protrusion 432 along the circumferential direction of the holding portion 43 .

In addition, the slit 435 is configured so as not to penetrate above the holding portion 43, and as a result, the upper portion of the holding portion 43 is connected in a ring shape. In addition, in this embodiment, the slit 435 is configured so that its upper end extends to the immediate vicinity of the retaining protrusion 432 .

In the attachment member 4 configured as described above, as shown in FIG. 7, two predetermined points on the outer peripheral surface of the outer ring portion 41 between which the holding portion 43 is placed are positioned at the center of the holding portion 43 when viewed from above. By pressing toward the axis CL side, the annular outer ring portion 41 in plan view can be deformed into an elliptical shape in plan view as indicated by the virtual line VL. In the present embodiment, two points (a point PA with a dotted pattern and an outer ring A portion of the outer peripheral surface of the portion 41 opposite to the portion PA with the holding portion 43 interposed therebetween) is pressed toward the central axis CL side of the holding portion 43 (in the direction of the hatched arrow in FIG. 7). , the outer annular portion 41 can be efficiently deformed.

By deforming the outer ring portion 41 into an elliptical shape in plan view, the portion of the outer ring portion 41 that is connected to the connecting portion 42 is deformed in a direction away from the central axis CL of the holding portion 43 . As a result, the connecting portion 42 moves away from the central axis CL of the holding portion 43 (in the direction of the black arrow in FIG. 7) to widen the width of the slit 435 , thereby expanding the lower opening of the holding portion 43 . In this embodiment, when the lower opening of the holding portion 43 is enlarged, the supporting projection 433 moves away from the central axis CL.

Next, a method for disposing the support shaft mechanism 5 inside the holding portion 43 of the attachment member 4 described above will be described. When disposing the support shaft mechanism 5 in the holding portion 43, first, the case portion 51 is inserted into the insertion guide portion 434 as shown in FIG. As a result, the holding portion 43 and the support shaft mechanism 5 can be arranged linearly. When inserting the case portion 51 into the insertion guide portion 434, the lower opening of the holding portion 43 may be expanded by pressing the outer ring portion 41, or the outer ring portion 41 may not be pressed. Alternatively, the lower opening of the holding portion 43 may not be expanded. FIG. 8 shows a state in which the lower opening of the holding portion 43 is not enlarged.

In this embodiment, by inserting the case portion 51 into the insertion guide portion 434 , the upper portion of the support shaft 52 protruding from the case portion 51 is in a state of being close to the inner surface of the support projection 433 . Particularly in this embodiment, the inner surface of the support projection 433 is arranged corresponding to the constricted portion provided on the upper portion of the support shaft 52 when the case portion 51 is inserted into the insertion guide portion 434 . there is This makes it difficult for the support shaft mechanism 5 to come off from the insertion guide portion 434 .

After inserting the case portion 51 into the insertion guide portion 434 , the outer ring portion 41 is pressed to expand the lower opening of the holding portion 43 and push the support shaft mechanism 5 into the inside of the holding portion 43 . When the support shaft mechanism 5 is pushed in, the reduced diameter surface 433A of the support projection 433 is pressed by the case portion 51, and the lower opening of the holding portion 43 is further expanded. The lower opening expands to such an extent that the protrusion 433 can be passed through. At this time, by enlarging the lower opening of the holding portion 43 by pressing the outer ring portion 41, the support shaft mechanism 5 can pass through the support projections 433 without increasing the pushing force applied to the support shaft mechanism 5. The lower opening can be easily enlarged to a certain extent.

Then, the support shaft mechanism 5 is further pushed into the holding portion 43 , and the entire support shaft mechanism 5 passes through the supporting projections 433 , so that the support shaft mechanism 5 is arranged inside the holding portion 43 . . After the support shaft mechanism 5 is arranged in the holding portion 43, the holding portion 43 returns to its original shape by releasing the pressure on the outer ring portion 41, and the support shaft mechanism 5 is moved by the supporting projections 433. is stably supported.

By pressing the outer peripheral surface of the outer ring portion 41, the lower opening of the holding portion 43 is expanded to such an extent that the support shaft mechanism 5 can pass through the supporting projections 433, and then it is supported in the holding portion 43. The shaft mechanism 5 may be arranged (inserted). That is, without pushing the support shaft mechanism 5 into the inside of the holding portion 43 while the case portion 51 is in contact with the reduced diameter surface 433A, the lower portion of the holding portion 43 is moved only by pressing the outer ring portion 41 . The opening may be sufficiently enlarged, and the support shaft mechanism 5 may be disposed (inserted) into the holding portion 43 in this state.

As described in detail above, according to the present embodiment, the attachment member 4 is configured to expand the lower opening of the holding portion 43 by pressing the outer circumferential surface of the outer ring portion 41 . Therefore, while pressing the outer ring portion 41 to enlarge the lower opening of the holding portion 43, the support shaft mechanism 5 can be more easily arranged (inserted) in the holding portion 43 through the enlarged lower opening. As a result, very excellent mounting workability can be obtained.

Furthermore, only two connecting portions 42 are provided in a positional relationship that sandwiches the holding portion 43 when viewed from above, and the slit 435 is positioned at the center of the two connecting portions 42 along the circumferential direction of the holding portion 43. It is provided in each of the two locations. Therefore, when the outer ring portion 41 is pressed and deformed, the direction of movement of the connecting portion 42 and the width direction of the slit 435 can be the same, and when the outer ring portion 41 is pressed and deformed, the slit 435 can be moved in an emergency direction. can be efficiently widened. In addition, the lower part of the holding part 43 is composed of two parts separated by the slit 435. When the outer ring part 41 is pressed and deformed, these two parts are separated from each other. can be moved by Therefore, when the outer ring portion 41 is pressed and deformed, the lower opening of the holding portion 43 can be expanded over the entire area. As a result, the support shaft mechanism 5 can be more easily arranged (inserted) in the holding portion 43, and a more excellent mounting workability can be obtained.

In addition, when disposing (inserting) the support shaft mechanism 5 into the holding portion 43, the support shaft mechanism 5 is brought into contact with the diameter-reduced surface 433A of the supporting projection 433 and pushed toward the inside of the holding portion 43. , the lower opening of the holding portion 43 can be enlarged. Here, by pushing the support shaft mechanism 5 toward the inner side of the holding portion 43 while enlarging the lower opening of the holding portion 43 by pressing the outer ring portion 41, the pushing force applied to the support shaft mechanism 5 is reduced. The lower opening of the holding part 43 can be widened without increasing the size. Therefore, according to the present embodiment, the provision of the diameter-reduced surface 433A and the fact that the lower opening of the holding portion 43 can be expanded by pressing the outer ring portion 41 are combined to support the inside of the holding portion 43. The shaft mechanism 5 can be arranged (inserted) very smoothly. As a result, mounting workability can be further improved.

In addition, since only two connecting portions 42 are provided, it is possible to secure a larger area (flowing water area) of the drainage channel formed between the holding portion 43 and the outer ring portion 41, thereby increasing the drainage capacity. can be improved.

Furthermore, the upper end of the slit 435 is configured to extend to the immediate vicinity of the retaining projection 432 , and has a shape that does not open at the upper end of the holding portion 43 . Therefore, the upper portion of the holding portion 43 is in a state of continuous ring, and the diameter of the upper opening of the holding portion 43 cannot be expanded. As a result, the function of preventing the support shaft mechanism 5 from coming off by the coming off-preventing protrusion 432 can be exhibited more effectively.

In addition, a retaining projection 432 is formed at a portion of the holding portion 43 corresponding to the upper end of the slit 435 . Therefore, the portion of the holding portion 43 corresponding to the upper end of the slit 435 can be made sufficiently thick to be in a state of excellent strength, and the holding portion 43 can be held when the slit 435 is widened by pressing and deforming the outer ring portion 41 . Breakage of the portion 43 can be more reliably prevented. As a result, durability and handleability can be improved.

In particular, in the present embodiment, the portion of the holding portion 43 corresponding to the upper end of the slit 435 is formed with the outward protrusion 431, so that the portion of the holding portion 43 corresponding to the upper end of the slit 435 is made thicker. It is possible to make the meat more excellent in strength. As a result, it is possible to more reliably prevent damage to the holding portion 43 when the slit 435 is widened by pressing and deforming the outer ring portion 41, and extremely excellent durability and handleability can be obtained.

Further, an insertion guide portion 434 through which the case portion 51 can be inserted is provided at the lower portion of the holding portion 43 , and when the support shaft mechanism 5 is arranged (inserted) into the holding portion 43 , the insertion guide portion By inserting the case portion 51 into the inside 434, the holding portion 43 and the support shaft mechanism 5 can be easily arranged in a straight line. That is, the relative positional relationship between the holding portion 43 and the support shaft mechanism 5 can be easily set to the state most suitable for the insertion of the support shaft mechanism 5 into the holding portion 43 . Therefore, it is possible to more easily dispose (insert) the support shaft mechanism 5 into the holding portion 43, and further improve the mounting workability.

Particularly in this embodiment, the insertion guide portion 434 has an inner diameter substantially equal to the outer diameter of the case portion 51 when the lower opening of the holding portion 43 is not enlarged. Therefore, the case portion 51 can be inserted into the insertion guide portion 434 without enlarging the lower opening of the holding portion 43, and the holding portion 43 and the support shaft mechanism 5 can be arranged linearly. easily possible. Thereby, mounting workability can be further improved.

Furthermore, when the case portion 51 is inserted into the insertion guide portion 434 , the upper portion of the support shaft 52 is in close proximity to the inner surface of the support projection 433 . Therefore, when the case portion 51 is inserted into the insertion guide portion 434, the support shaft mechanism 5 can be supported by both the support projection 433 and the insertion guide portion 434, and the holding portion 43 and the support shaft mechanism 5 can be supported. A straight line can be maintained more stably. This makes it possible to more easily dispose (insert) the support shaft mechanism 5 into the holding portion 43, and further improve the mounting workability.

In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not exemplified below are naturally possible.

(a) In the above embodiment, two connecting portions 42 are provided, but three or more connecting portions may be provided.

(b) In the above embodiment, the slit 435 is configured so that its upper end extends to the immediate vicinity of the retaining projection 432, but the slit may be configured so that its upper end extends to the retaining projection 432. good. In other words, the slit may be configured to reach the retaining protrusion 432 .

In addition, the positions where the slits are formed may be changed as appropriate.

Furthermore, in the above-described embodiment, the slit 435 has a shape that does not penetrate above the holding portion 43 , but the slit may be configured so as to penetrate above the holding portion 43 . That is, a slit may be formed so as to penetrate vertically through the holding portion 43 (reference example) .

(c) In the above embodiment, the connection portion 42 has a shape including the connection base portion 421 having the water flow generating surface 421A, but the shape of the connection portion 42 is not limited to this. . Therefore, for example, the connecting portion may be configured to have a rod shape or a flat plate shape.

(d) In the above embodiment, the insertion guide portion 434 is configured to have an inner diameter substantially equal to the outer diameter of the case portion 51 when the lower opening of the holding portion 43 is not enlarged. On the other hand, when the lower opening of the holding portion 43 is not enlarged, the insertion guide portion is configured to have an inner diameter smaller than the outer diameter of the case portion 51, and the lower opening is enlarged. It may be configured such that the case portion 51 can be inserted into the portion. Even in such a configuration, pressing the outer peripheral surface of the outer ring portion 41 enlarges the lower opening of the holding portion 43, so that the case portion 51 can be easily inserted into the insertion guide portion. be able to.

(e) In the above embodiment, the plug lid 6 is provided with the rectifying member 63, but the rectifying member 63 may be omitted.

(f) In the above-described embodiment, the flow path forming part 8 is composed of the drain port member 2 and the pipe 3, but the flow path forming part is not necessarily limited to such a structure. For example, in a configuration in which the drain port member is omitted and the pipe is directly connected to the bathtub 100 so that the inner peripheral surface of the pipe and the surface forming the drain port 102 in the bathtub 100 are continuous, the drain port in the bathtub 100 The part forming 102 and the piping constitute a flow path forming part. In addition, in this configuration, when an annular seal member is provided between the upper end surface of the bathtub 100 and the pipe, since drainage flows through the part forming the drain port 102 in the bathtub 100, the seal member and the pipe, the sealing The member also becomes a part of the flow path forming portion.

(g) In the above-described embodiment, the attachment member 4 (outer ring portion 41) is attached to the inner surface of the drain port member 2. It should be on the inside. Therefore, the attachment member 4 (outer ring portion 41 ) may be attached to the inner surface of the pipe 3 , or may be attached to both inner surface portions from the drain port member 2 to the pipe 3 .

(h) In the above embodiment, the cap 6 is placed on the support shaft 52 , but the tip (upper end) of the support shaft 52 is attached (fixed) to the cap 6 . may be configured. In addition, in such a configuration, it is possible to prevent tilting of the plug lid 6, etc., so the inner cylindrical portion 613 may be omitted.

(i) In the above embodiment, the drain port 102 is closed by contacting the drain port member 2 with the plug lid 6 (packing portion 62). may contact the bottom portion 101 of the bathtub 100 to close the drain port 102 .

(j) In the above embodiment, the bathtub 100 is exemplified as the tank, but the tank to which the technical concept of the present invention can be applied is not limited to the bathtub. Therefore, for example, the technical concept of the present invention may be applied to tank bodies other than bathtubs, such as washbowls and kitchen sinks.

REFERENCE SIGNS LIST 1 drain plug device, 4 attachment member, 5 support shaft mechanism, 6 plug lid, 8 flow passage forming portion, 41 outer ring portion, 42 connecting portion, 43 holding portion, 51 case portion, 52... Support shaft 100... Bathtub (tub body) 102... Drain port 432... Retaining protrusion 433... Supporting protrusion 433A... Reduced diameter surface 434... Insertion guide part 435... Slit.

Claims (5)

A stopper lid for opening and closing a drain port provided in the tank body;
a flow path forming part, the inside of which forms a flow path for the drainage flowing through the drainage port;
a support shaft mechanism having a rod-shaped support shaft that supports the plug lid at its upper end and is capable of vertically moving the plug lid by its own vertical movement;
A cylindrical holding part having a support projection protruding inward on the inner circumference of the lower part and holding the support shaft mechanism on the inner circumference in a state where the support shaft mechanism is supported by the support projection, and the holding part An annular outer ring portion that is provided outside and attached to the inner surface of the flow path forming portion, and a connecting portion that connects the holding portion and the outer ring portion, and is provided within the flow path forming portion. and an attachment member that is
A drain plug device configured to switch between open and closed states of the drain port by vertical movement of the support shaft,
The holding part has a slit that opens at the lower end,
When the attachment member deforms the outer ring portion by pressing two points on the outer peripheral surface of the outer ring portion with the holding portion therebetween toward the holding portion side in a plan view, the outer ring portion is deformed. A portion of the annular portion that is connected to the connecting portion deforms in a direction away from the central axis of the holding portion, and as a result, the connecting portion moves and the slit widens, so that the lower portion of the holding portion It is configured so that the opening expands,
The holding part protrudes inward and has a retaining protrusion for preventing the support shaft mechanism from coming off from the upper opening,
The slit is provided at a position corresponding to the formation range of the retaining protrusion along the circumferential direction of the holding part, and the upper end of the slit is configured to extend to the retaining protrusion or to the immediate vicinity of the retaining protrusion. A drain plug device characterized by: Only two connecting portions are provided in a positional relationship that sandwiches the holding portion when viewed from above,
2. The drain plug device according to claim 1, wherein the slits are provided at two locations located in the center of the two connecting portions along the circumferential direction of the holding portion. The support shaft mechanism includes a cylindrical case portion that holds the support shaft on its inner circumference in a vertically movable state,
2. A cylindrical insertion guide portion that forms the lower opening and allows the case portion to be inserted is provided below the supporting projection in the holding portion. Or the drain plug device according to 2 . 4. The drain plug device according to claim 3 , wherein the supporting protrusion has a diameter-reduced surface that continues to the inner peripheral surface of the insertion guide portion and whose inner diameter gradually decreases upward. The support shaft has an upper portion protruding from the case,
In a state in which the case portion is inserted into the insertion guide portion so as to dispose the support shaft mechanism in the holding portion, the upper portion of the support shaft is configured to be in a state of being close to or in contact with the inner surface of the support projection. The drain plug device according to claim 3 or 4 , characterized in that the drain plug device is

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