JP6652415B2 - Drain tap device - Google Patents

Description

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

  The drain plug device is for opening and closing a drain port of a tank (for example, a bathtub or a basin). The drainage plug device includes a support shaft provided in a vertically movable manner at a drain port, and a plug lid attached to a tip end of the support shaft. Then, with the lowering of the support shaft, the stopper lid comes into contact with the tank body or a member attached thereto, whereby the drain port is closed, and with the upper shaft moving, the stopper lid separates from the tank body or the like. This opens the drain.

  In general, the stopper has a disk-shaped main body and a cylindrical mounting cylinder provided at the center of the rear surface of the main body. The stopper is attached to the support shaft by fitting the distal end of the support shaft to the inner periphery of the mounting tube. Here, as a method of attaching the stopper to the support shaft, a method using an annular elastic member made of a flexible material has been proposed (for example, see Patent Document 1).

  More specifically, the mounting method will be described. While an annular concave groove is formed at the tip of the support shaft, the inner peripheral portion of the inner peripheral side of the mounting cylindrical portion is formed inside the mounting cylindrical portion. The elastic member is embedded so as to protrude from the peripheral surface. Then, the front end of the support shaft is pushed into the inner periphery of the mounting tube portion, and the inner peripheral side portion of the elastic member is disposed in the concave groove, whereby the stopper is attached to the support shaft. Conversely, by pulling out the support shaft from the mounting tube, the stopper is removed from the support shaft. Incidentally, a rubber O-ring is conceivable as the elastic member.

Japanese Patent No. 3928144

  However, in the above method, when attaching and detaching the stopper from the support shaft, a relatively large frictional force may be generated between the outer peripheral surface of the support shaft and the elastic member. For this reason, there is a possibility that the attachment / detachment of the stopper lid to / from the support shaft cannot be performed easily.

  Further, the elastic member may be detached from the concave groove or the elastic member itself may be damaged due to a frictional force generated at the time of attachment and detachment.

  Further, when the stopper is attached to the support shaft, it is determined whether or not the inner peripheral portion of the elastic member is arranged in the concave groove (that is, whether the stopper is normally attached to the support shaft). For example, it is difficult to judge whether or not the attachment has been performed normally without making a judgment based on a load applied to the hand. Therefore, it is difficult to say that the convenience of the mounting operation is good.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily attach and detach a stopper to and from a support shaft, to prevent breakage, and to improve convenience related to an attaching operation. A drain plug device is provided.

  Hereinafter, each means suitable for solving the above-mentioned object will be described in terms of items. In addition, the function and effect peculiar to the corresponding means will be added if necessary.

Means 1. A rod-shaped support shaft supported in a vertically movable manner at a drain port of the tank body,
A stopper attached to the tip of the support shaft, for opening and closing the drain port,
A drain plug device in which the drain port is opened and closed with the vertical movement of the support shaft,
The stopper is,
A disk-shaped body,
A tip portion of the support shaft includes a hole that can be inserted therethrough, and has a tubular mounting tubular portion provided at a central portion on the back surface of the main body portion,
On the inner circumference of the mounting cylinder,
A small diameter portion located on the opening side of the hole,
The inner diameter of itself is made larger than the inner diameter of the small diameter part, and the large diameter part adjacent to the small diameter part is formed on the side opposite to the opening of the hole part,
An annular groove is formed at the tip of the support shaft, and a resin C-ring that is elastically deformable in the radial direction is arranged in the groove.
The C ring is configured to be able to pass through the small diameter portion by being elastically deformed inward in the radial direction,
The tip of the support shaft and the C-ring are inserted through the hole, and the C-ring is placed in the large-diameter portion, whereby the support shaft is prevented from coming off from the hole. In the state, the stopper is attached to the tip of the support shaft ,
The large diameter portion is formed closer to the opening side of the hole than the center along the depth direction of the hole,
A drain plug device , wherein the tip surface of the support shaft is configured to be in contact with or close to the main body in a state where the stopper is attached to the tip portion of the support shaft .

  According to the above-described means 1, by pushing the tip of the support shaft on which the C-ring is mounted into the hole, the C-ring is elastically deformed radially inward with the contact with the small-diameter portion, so that the small-diameter portion is deformed. Pass through. When the C-ring reaches the large-diameter portion, the elastic deformation of the C-ring is completely or partially released, and the C-ring is disposed at the large-diameter portion. As a result, the stopper is attached to the distal end of the support shaft in a state where removal of the support shaft from the hole is restricted. That is, according to the above-described means 1, by a simple method of pushing the distal end of the support shaft on which the C-ring is mounted into the hole, the detachment of the support shaft from the hole is restricted. A stopper can be attached to the tip.

  On the other hand, by applying a force to the support shaft and the stopper along the direction in which the support shaft is pulled out from the hole, the C-ring deforms the small-diameter portion in a state of being elastically deformed radially inward due to contact with the small-diameter portion. Pass through, so that the stopper can be removed from the support shaft. That is, the stopper can be removed from the support shaft by a simple method of applying a force to the support shaft or the like along the direction in which the support shaft is pulled out from the hole.

  According to the means 1, since the C ring is made of resin, the frictional force generated between the C ring and the small diameter portion when the C ring passes through the small diameter portion can be made relatively small. Therefore, the support shaft can be smoothly moved in the hole, and the attachment / detachment (attachment / removal) of the stopper lid to / from the support shaft can be easily performed.

  Further, as described above, since the frictional force generated between the C-ring and the small diameter portion can be reduced, the load applied to the C-ring at the time of attachment and detachment can be reduced. As a result, breakage of the device due to attachment and detachment can be more reliably prevented.

  Furthermore, according to the above-mentioned means 1, when the C-ring reaches the large-diameter portion at the time of attachment and the elastic deformation of the C-ring is released, the sound and noise are generated by the repulsive force generated by the release of the elastic deformation. An impact (click feeling) can be generated. Therefore, it is possible to easily grasp whether or not the stopper is normally attached to the support shaft based on the sound and the impact. As a result, the convenience of the mounting operation can be improved.

By the way, when the large-diameter portion is formed in the back of the hole, it is necessary to push the C-ring into the back of the hole when attaching the stopper to the support shaft. However, in this case, since the moving distance of the C-ring before reaching the large-diameter portion becomes relatively large, the state in which the C-ring is arranged on the inner periphery of the small-diameter portion for a certain period of time during the mounting work is considered. Will be maintained. In this state, since the C-ring is in pressure contact with the small-diameter portion, the stopper becomes stable to some extent with respect to the support shaft. Therefore, there is a possibility that the C-ring is not actually disposed at the large diameter portion, and that the stopper is not properly attached to the support shaft, but that the attachment is normally completed. is there. That is, there is a possibility that an attachment error is likely to occur.

In this regard, according to the means 1 , the large diameter portion is formed on the opening side (front side) of the hole. Therefore, the distance over which the C-ring passes through the small diameter portion during the mounting operation can be made relatively small. Then, a this point, the upper Symbol Operation for effect (C-ring is made of resin, C ring and that can reduce the frictional force generated between the small-diameter portion) I and is coupled with, at the time of installation work, usually, C-ring Will pass through the small diameter portion instantaneously. For this reason, normally, a situation in which the state in which the C-ring is arranged on the inner periphery of the small diameter portion does not occur during the mounting operation does not occur. As a result, the stopper can be more reliably attached to the support shaft in a normal state, and the occurrence of an attachment error can be more reliably prevented.

Furthermore, according to the above-mentioned means 1 , if the C-ring is pushed into the hole only slightly while the C-ring is in contact with the opening of the mounting cylinder, the stopper can be normally attached to the support shaft. Can be. Therefore, attachment and detachment of the stopper lid with respect to the support shaft can be performed more easily.

According to the above-described means 1, when the stopper is not properly attached to the support shaft (in a state where a part of the support shaft is simply inserted into the hole), the C-ring is usually inserted into the hole. And is exposed to the outside. Therefore, it can be determined whether or not the stopper is normally attached to the support shaft based on whether or not the C-ring can be confirmed from the outside. Thereby, the occurrence of the mounting mistake can be more effectively prevented.

In addition, according to the above-described means 1 , in a state where the stopper is attached to the distal end of the support shaft (including the moment when the C-ring is disposed at the large diameter portion), the distal end surface of the support shaft is attached to the main body. It is configured to be in contact or close proximity. Therefore, when the support shaft is pushed into the hole during the mounting operation, the distal end surface of the support shaft comes into contact with the main body, thereby preventing the support shaft from being excessively inserted into the hole. Thereby, it is possible to more reliably prevent the C-ring from passing through the large-diameter portion, and it is possible to further enhance the effect of preventing the occurrence of mounting errors.

Means 2 . The mounting tube portion extends in its own axial direction and includes a slit that opens at a tip portion, and is made of an elastically deformable resin,
2. The drainage plug device according to claim 1, wherein at least the inner diameter of the small-diameter portion can be enlarged by widening the slit along with the elastic deformation of the mounting tube portion. 3.

According to the above means 2 , the small diameter portion can be pushed and widened by the C ring at the time of attachment and detachment. Therefore, the C-ring can more easily pass through the small diameter portion, and the stopper can be more easily attached to and detached from the support shaft.

Further, according to the above-described means 2 , since the mounting cylinder portion is made of an elastically deformable resin and has the slit, it has flexibility. Therefore, when an external force is applied to the stopper, the mounting tube is less likely to be damaged, and the durability can be improved.

Furthermore, since the large-diameter portion has a so-called undercut shape, it is difficult to pull out the mold corresponding to the large-diameter portion from the mounting cylinder when manufacturing the plug lid by molding. Thus, there is a possibility that the mounting cylinder (plug lid) may be damaged. However, according to the above-described means 2 , a slit is formed in the mounting cylinder, and the mounting cylinder is easily deformed flexibly. The mold corresponding to the large diameter portion can be easily pulled out from the mounting tube portion. Thereby, breakage of the stopper at the time of manufacturing can be effectively suppressed, and productivity can be improved.

It is a partially broken front view of a drainage plug device. It is an expanded sectional view of a support shaft, a plug lid, etc. It is a perspective view of a C ring. FIG. 9 is a schematic front view of a stopper and the like for explaining one process when attaching the stopper to the tip of the support shaft. FIG. 9 is a schematic cross-sectional view of a stopper and the like for explaining one process when attaching the stopper to the tip of the support shaft. FIG. 9 is a schematic cross-sectional view of a stopper and the like for explaining one process when attaching the stopper to the tip of the support shaft. It is a perspective view of the stopper which shows the attachment cylinder part in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, the drainage plug device 1 is attached to a basin 100 as a tank body, and includes a drainage pipe 2, a lid-side mechanism 3, a drainage port device 4, and a hair catcher 5. Have. The basin 100 includes a bottom wall 101 that forms the bottom surface, and a drain port 102 is formed in the bottom wall 101. Further, the basin 100 is provided with an overflow port (not shown) for preventing overflow of water.

  The drain pipe 2 includes a main pipe 21, a branch pipe 22, and a mounting pipe 23.

  The main pipe 21 has a tubular shape extending in the vertical direction, and is attached to the back surface of the bottom wall 101 such that its internal space communicates with the drain port 102 by, for example, screwing. The water in the basin 100 is discharged through the inside of the main pipe 21. An annular seal member 6 made of an elastically deformable material is disposed between the upper end of the main pipe 21 and the bottom wall 101, and the seal member 6 is used to seal the drain pipe 2 and the bottom wall 101. Are sealed watertight.

  The branch pipe 22 extends from the outer periphery of the main pipe 21 in a direction intersecting with the direction in which the main pipe 21 extends. Further, the branch pipe 22 has an internal space communicating with the internal space of the main pipe 21 and is connected to the overflow port via a predetermined connection pipe 7. As a result, the wastewater that has passed through the overflow port flows into the main pipe 21 through the connecting pipe 7.

  The mounting pipe 23 extends from the outer periphery of the main pipe 21 in a direction orthogonal to the direction in which the main pipe 21 extends, and its internal space communicates with the internal space of the main pipe 21. The mounting tube 23 functions as a mounted portion of the stopper-side mechanism 3.

  The stopper-side mechanism 3 is attached to the attachment tube 23 with a part thereof being inserted through the attachment tube 23. The stopper-side mechanism 3 includes a rotating part 32 that can be rotated about a rotating shaft that extends in the horizontal direction, and a rod-shaped support protrusion 31 that protrudes from the outer periphery of the rotating part 32. The support projection 31 projects into the main pipe 21 and supports the drainage device 4. In the present embodiment, the support projection 31 is short enough not to reach the central axis of the main pipe 21.

  Further, a tubular tube member 8 is connected to the stopper-side mechanism 3, and a transmission member 9 (for example, a wire or the like) is arranged in the tube member 8. The transmission member 9 is capable of reciprocating within the tube member 8, and is reciprocated by displacing a predetermined operating member (for example, a reciprocating operation button or a rotatable operation handle) not shown. It is designed to move. Then, with the reciprocating movement of the transmission member 9, the rotating portion 32 rotates, and the support protrusion 31 moves up and down.

  The drain port device 4 includes a water passage member 41, a support shaft 42, and a stopper 43.

  The water passage member 41 is disposed in the main pipe 21 so as to be vertically movable, and includes an annular outer peripheral wall portion 41A and a lower collecting portion 41B extending inward from the inner periphery of the outer peripheral wall portion 41A. Have.

  The outer peripheral wall portion 41 </ b> A is arranged inside the main pipe 21 along the inner peripheral surface of the main pipe 21. Further, since the lower end surface of the outer peripheral wall portion 41A is placed on the support protrusion 31, the water-permeable member 41 and thus the drain device 4 are supported in the main pipe 21 by the support protrusion 31. I have.

  The lower collecting portion 41B has an inner peripheral portion fixed to the support shaft 42, and has a plurality of ribs extending along the radial direction of the outer peripheral wall portion 41A. In the lower collecting part 41B, the drainage flowing through the drainage pipe 2 flows down through the gap formed between the ribs, and on the other hand, dust and the like contained in the drainage are collected.

  The support shaft 42 is formed in a rod shape, and a stopper 43 is attached to a tip portion thereof, and a water passage member 41 (a lower collecting portion 41B) is fixed to a lower end portion thereof. Therefore, when the water-passage member 41 moves up and down due to the vertical movement of the support protrusion 31, the support shaft 42 and the stopper 43 move together with the water-passage member 41. The structure relating to the attachment of the support shaft 42 and the stopper 43 will be described later.

  The stopper lid 43 includes a disk-shaped main body 43A made of resin or the like, and an annular packing part made of an elastically deformable material (for example, rubber or resin) attached to the outer peripheral side of the rear surface of the main body 43A. 43B. In the present embodiment, when the drainage device 4 is moved down by its own weight with the downward movement of the support protrusion 31, the entire outer peripheral portion of the packing portion 43 </ b> B contacts the bottom wall portion 101, thereby closing the drainage hole 102. It has become so. On the other hand, when the drainage device 4 moves upward with the upward movement of the support protrusion 31, the drainage hole 102 is opened by separating the packing portion 43B from the bottom wall portion 101.

  Further, in the present embodiment, when the drain port 102 is opened, the support protrusion 31 is in contact with the lower end surface of the outer peripheral wall portion 41A, but when the drain port 102 is closed, the support protrusion 31 is in contact with the outer peripheral wall portion 41A. It can be separated from the lower end surface. Accordingly, when the drain port 102 is closed, the stopper 43 (the packing portion 43B) can be reliably brought into contact with the bottom wall portion 101, and good watertightness can be obtained.

  In the present embodiment, the drain port device 4 and the hair catcher 5 can be removed from the drain pipe 2 at one time by pulling up the stopper 43 and the support shaft 42 from the front side of the basin 100. Then, when the drain port device 4 and the hair catcher 5 are removed from the drain pipe 2, only the support projections 31 are slightly protruded in the drain pipe 2 (main pipe 21). Therefore, maintenance and cleaning can be improved.

  The hair catcher 5 has a dish shape as a whole, and includes a collecting portion 51 having a plurality of water passage holes formed therethrough, and an outer ring portion 52 located at the outermost periphery. The collection unit 51 collects foreign substances contained in the wastewater. The outer ring portion 52 holds the hair catcher 5 in the main pipe 21 by being placed on a step formed on the inner periphery of the main pipe 21. Note that the hair catcher 5 is basically maintained in a state where the entire circumference of the outer ring portion 52 is placed on the step portion of the main pipe 21 even when the support shaft 42 moves up and down. ing. Thereby, more reliable collection of foreign matter is achieved.

  Next, a structure related to attachment of the stopper 43 to the support shaft 42 will be described.

  First, the structure on the stopper lid 43 side will be described. As shown in FIG. 2, in the stopper lid 43, a tubular mounting tube portion 43 </ b> C is formed to protrude downward at a central portion on the back surface of the main body portion 43 </ b> A. The mounting cylinder 43C has a hole 43D that extends along the central axis of the plug lid 43 and that is configured to allow the distal end of the support shaft 42 to be inserted therethrough.

  In addition, a small-diameter portion 43E located on the lower-end opening side of the hole 43D and a large-diameter portion adjacent to the small-diameter portion 43E on the side opposite to the lower-end opening of the hole 43D are provided on the inner periphery of the mounting cylinder 43C. 43F are formed.

  The small-diameter portion 43E has an inner diameter that is substantially the same as the outer diameter of the foremost portion of the support shaft 42 (a portion closer to the tip than a groove 42A described later). The inner diameter of a portion of the hole 43D located behind the large diameter portion 43F is the same as the inner diameter of the small diameter portion 43E.

  The large-diameter portion 43F has an inner diameter larger than the inner diameter of the small-diameter portion 43E, and the large-diameter portion 43F forms an annular groove extending in the circumferential direction on the inner periphery of the mounting tubular portion 43C. Is formed. In the present embodiment, a tapered enlarged portion 43G whose inner diameter gradually increases toward the depth of the hole 43D is provided in a portion of the large diameter portion 43F adjacent to the small diameter portion 43E. On the other hand, a tapered reduced diameter portion 43H whose inner diameter gradually decreases toward the depth of the hole 43D is provided in a portion of the large diameter portion 43F which is located on the opposite side to the small diameter portion 43E.

  Further, the large diameter portion 43F is formed closer to the lower end opening side of the hole 43D than the center along the depth direction of the hole 43D. Thereby, the small diameter portion 43F is relatively short.

  Next, the structure on the support shaft 42 side will be described. An annular groove 42A is formed at the tip of the support shaft 42, and a C-ring 44 is arranged in the groove 42A.

  The C-ring 44 is attached to the support shaft 42 so as to be relatively immovable along the axial direction. Further, the C ring 44 is formed of a predetermined resin having a relatively small coefficient of friction (for example, POM or the like), and further, as shown in FIG. It has a notch 44A that penetrates. The C-ring 44 can be elastically deformed in its own radial direction by being deformed in a direction in which the width of the cutout portion 44A is enlarged or reduced, so that the outer diameter of the C-ring 44 changes with this elastic deformation. It has become. The C-ring 44 is configured to be able to pass through the inner circumference of the small-diameter portion 43E in a state of being elastically deformed radially inward. This configuration is based on the size of the gap formed between the inner peripheral surface of the C-ring 44 and the support shaft 42 (the part forming the bottom surface of the groove 42A) during the inelastic deformation, and the width of the notch 44A. It can be realized by appropriately setting the above.

  Further, a first reduced diameter surface 44B and a second reduced diameter surface 44C are formed on the outer peripheral surface of the C ring 44. The first reduced-diameter surface 44B is formed from the outermost peripheral surface of the C-ring 44 to the end surface of the C-ring 44 at one end in the axial direction, and has a shape in which the outer diameter gradually decreases toward the end surface at the one end. Have been. The second reduced-diameter surface 44C is formed from the outermost peripheral surface of the C-ring 44 to the end surface of the C-ring 44 on the other end in the axial direction, and the outer diameter gradually decreases toward the end surface on the other end. It is shaped.

  In the present embodiment, the C-ring 44 has a vertically symmetric shape, and both reduced-diameter surfaces 44B and 44C have the same shape. In the present embodiment, both the reduced diameter surfaces 44B and 44C are formed into curved surfaces convex outward. However, the shape of both reduced diameter surfaces 44B and 44C is not limited to this, and may be, for example, an inclined surface (tapered surface).

  Further, the thickness of the C ring 44 in the axial direction is substantially the same as the length of the large diameter portion 43F in the axial direction of the mounting cylinder 43C.

  Then, in the support shaft 42 and the stopper 43 configured as described above, as shown in FIG. 2, the C-ring 44 is disposed in the large-diameter portion 43F, and the tip of the support shaft 42 with respect to the hole 43D. When the portion is inserted, the stopper lid 43 is attached to the tip of the support shaft 42 in a state where the removal of the support shaft 42 from the hole 43D is restricted. As described above, since the thickness of the C ring 44 is almost the same as the length of the large diameter portion 43F, the C ring 44 is locked to the large diameter portion 43F with almost no play.

  Further, in a state where the stopper 43 is attached to the distal end of the support shaft 42, from the large diameter portion 43F to the bottom of the hole 43D such that the distal end surface of the support shaft 42 contacts or approaches the main body 43A. The distance is substantially equal to the distance from the distal end surface of the support shaft 42 to the C-ring 44.

  When the stopper 43 is attached to the support shaft 42, the C-ring 44 is maintained in a state of being elastically deformed inward in the radial direction, so that the second reduced-diameter surface 44C with respect to the enlarged-diameter portion 43G. The support shaft 42 may be maintained in a pressed state, and the distal end surface of the support shaft 42 may contact the main body 43A. In this case, the distal end surface of the support shaft 42 is pressed against the main body 43A, and the relative movement of the support shaft 42 and the mounting cylinder 43C along the axial direction of the support shaft 42 can be prevented. . As a result, the support shaft 42 and the plug lid 43 can be mounted in a stable state without play.

  Further, in a state where the stopper 43 is attached to the support shaft 42, the C-ring 44 is maintained in a state of being elastically deformed inward in the radial direction, so that the second reduced-diameter surface 44C is formed with respect to the enlarged-diameter portion 43G. The first reduced diameter surface 44B may be configured to be pressed against the reduced diameter portion 43H. In this case, since the C-ring 44 is sandwiched between the enlarged diameter portion 43G and the reduced diameter portion 43H, the C-ring 44 cannot be relatively moved along the axial direction with respect to the mounting tubular portion 43C. . As described above, since the C-ring 44 cannot move relative to the support shaft 42 along the axial direction thereof, as a result, the support shaft 42 and the mounting The relative movement of the cylindrical portion 43C can be prevented. Thereby, the support shaft 42 and the stopper 43 can be attached in a stable state without play.

  Next, a method of attaching the stopper 43 to the tip of the support shaft 42 will be described. First, the C-ring 44 is attached to the groove 42A of the support shaft 42 in advance. Then, as shown in FIGS. 4 and 5, a portion of the support shaft 42 closer to the tip side than the C-ring 44 is inserted into the hole 43D, and the first reduced-diameter surface 44B of the C-ring 44 is attached to the mounting cylinder portion. A state is brought into contact with the inner peripheral surface (opening) of the tip of 43C.

  Next, a force is applied to at least one of the support shaft 42 and the stopper lid 43 so that the support shaft 42 enters the depth of the hole 43D. Thereby, the C-ring 44 elastically deforms radially inward while the first reduced-diameter surface 44B slides on the inner peripheral surface of the distal end portion of the mounting cylinder portion 43C. Then, when the outer diameter of the C ring 44 becomes smaller than the inner diameter of the small diameter portion 43E, the C ring 44 enters into the small diameter portion 43E as shown in FIG. Once the C-ring 44 has entered the small-diameter portion 43E, there is almost no resistance to the insertion of the support shaft 42, so that the support shaft 42 enters the back of the hole 43D at a stretch by the force. That is, the C-ring 44 instantaneously passes through the small diameter portion 43E. When the C ring 44 reaches the large diameter portion 43F, the elastic deformation of the C ring 44 is completely or partially released, and the C ring 44 is disposed with respect to the large diameter portion 43F. As a result, the stopper 43 is attached to the tip of the support shaft 42. When the elastic deformation of the C-ring 44 is released, a sound or an impact (click feeling) is generated by the repulsive force generated by the release of the elastic deformation.

  On the other hand, when removing the stopper 43 from the support shaft 42, a force in a direction opposite to that at the time of attachment is applied to at least one of the support shaft 42 and the stopper 43. As a result, the C-ring 44 elastically deforms radially inward while the second reduced-diameter surface 44C slides on the large-diameter portion 43F (the large-diameter portion 43G). When the outer diameter of the C-ring 44 becomes smaller than the inner diameter of the small-diameter portion 43E, the C-ring 44 comes off from the large-diameter portion 43F, and the tip of the support shaft 42 comes off from the hole 43D. As a result, the stopper 43 is removed from the support shaft 42.

  As described above in detail, according to the present embodiment, the support shaft 42 from the hole 43D is pressed by a simple method of pushing the tip of the support shaft 42 with the C ring 44 into the hole 43D. The stopper 43 can be attached to the distal end of the support shaft 42 in a state where the removal is restricted. On the other hand, when removing the stopper 43 from the supporting shaft 42, the stopper 43 is removed from the supporting shaft 42 by a simple method of applying a force to the supporting shaft 42 or the like along the direction in which the supporting shaft 42 is pulled out from the hole 43D. Can be removed.

  Since the C ring 44 is made of resin, the frictional force generated between the C ring 44 and the small diameter portion 43E when the C ring 44 passes through the small diameter portion 43E can be made relatively small. Therefore, the support shaft 42 can be smoothly moved in the hole 43D, and the attachment / detachment (attachment / removal) of the stopper 43 with respect to the support shaft 42 can be easily performed.

  Further, since the frictional force generated between the C ring 44 and the small diameter portion 43E can be reduced, the load applied to the C ring 44 at the time of attachment and detachment can be reduced. As a result, breakage of the device due to attachment and detachment can be more reliably prevented.

  Further, when the C-ring 44 reaches the large-diameter portion 43F at the time of mounting and the elastic deformation of the C-ring 44 is released, the repulsive force generated due to the release of the elastic deformation causes a sound or an impact (click feeling). ) Can occur. Therefore, whether or not the stopper 43 is normally attached to the support shaft 42 can be easily grasped based on this sound or impact. As a result, the convenience of the mounting operation can be improved.

  In addition, since the large-diameter portion 43F is formed on the opening side (front side) of the hole 43D, the distance that the C-ring 44 passes through the small-diameter portion 43E during the mounting operation can be made relatively small. Then, in combination with this point and the fact that the frictional force generated between the C ring 44 and the small diameter portion 43E can be reduced, the C ring 44 usually immediately passes through the small diameter portion 43E during the mounting work. Therefore, normally, during the mounting operation, a situation in which the state in which the C ring 44 is arranged on the inner periphery of the small diameter portion 43E is not generated does not occur. As a result, the stopper 43 can be more reliably attached to the support shaft 42 in a normal state, and the occurrence of an attachment error can be more reliably prevented.

  Further, in the present embodiment, when the C ring 44 is slightly pushed into the depth of the hole 43D in a state where the C ring 44 is in contact with the opening of the mounting cylinder 43C, the plug is The lid 43 can be attached normally. Therefore, attachment and detachment of the stopper 43 with respect to the support shaft 42 can be performed more easily.

  Also, in a state where the stopper 43 is not normally attached to the support shaft 42 (a state in which a part of the support shaft 42 is in the hole 43D), the C ring 44 is usually in the hole 43D. Instead, it is exposed to the outside (the state shown in FIG. 4). Therefore, it can be determined whether or not the stopper 43 is normally attached to the support shaft 42 based on whether or not the C ring 44 can be confirmed from the outside. Thereby, the occurrence of the mounting mistake can be more effectively prevented.

  In addition, in this embodiment, in a state where the stopper 43 is attached to the support shaft 42 (including the moment when the C-ring 44 is disposed on the large-diameter portion 43F), the distal end surface of the support shaft 42 is attached to the main body 43A. Is configured to be in contact with or close to Therefore, when the support shaft 42 is pushed into the hole 43D during the mounting operation, the support shaft 42 is excessively inserted into the hole 43D because the distal end surface of the support shaft 42 contacts the main body 43A. Can be prevented. Thereby, it is possible to more reliably prevent the C ring 44 from passing through the large-diameter portion 43F, and it is possible to further enhance the effect of preventing the occurrence of a mounting error.

  Further, in the present embodiment, since the C-ring 44 is vertically symmetrical, it is not necessary to consider the mounting direction of the C-ring 44 when arranging the C-ring 44 in the groove 42A. Therefore, the convenience related to the mounting operation and the like can be improved.

  It should be noted that the present invention is not limited to the content described in the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modifications not illustrated below are naturally possible.

  (A) In the above embodiment, the mounting cylinder 43C has a cylindrical shape that is continuous in the circumferential direction, and is configured not to be particularly deformed when the stopper 43 is mounted on the tip of the support shaft 42. ing. On the other hand, as shown in FIG. 7 (the packing portion 43B is not shown in FIG. 7), for example, the mounting tube portion 43T is formed of an elastically deformable resin, and the mounting tube portion 43T is A plurality of slits 43S extending in the axial direction and opening at the distal end portion are provided, and the inner diameter of at least the small-diameter portion 43E can be enlarged by widening the slit 43S with the elastic deformation of the mounting tube portion 43T. May be.

  In this case, the small-diameter portion 43E can be expanded by the C ring 44 when the stopper 43 is attached to and detached from the support shaft 42. Therefore, the C-ring 44 more easily passes through the small-diameter portion 43E, and the attachment / detachment of the stopper 43 with respect to the support shaft 42 can be performed more easily.

  In addition, since the mounting cylinder portion 43T is made of an elastically deformable resin and has the slit 43S, it has flexibility. Therefore, when an external force is applied to the stopper 43, the mounting tube 43T is less likely to be damaged, and the durability can be improved.

  Further, since the mounting cylinder 43T is easily deformed flexibly, when the plug lid 43 (the main body 43A and the mounting cylinder 43T) is manufactured by molding, the mold corresponding to the large-diameter portion 43F is set to the mounting cylinder. 43T can be easily pulled out. Thereby, breakage of the stopper 43 during manufacturing can be effectively suppressed, and productivity can be improved.

  (B) In the above embodiment, the C-ring 44 has a vertically symmetric shape, but the shape of the C-ring is not limited to this and can be changed as appropriate. Therefore, for example, the diameter reduction ratio of the two reduced diameter surfaces 44B and 43C along the central axis of the C ring 44 (the reduction amount of the outer diameter per unit length along the central axis) may be different. Here, for example, it is assumed that the reduced diameter ratio of the first reduced diameter surface 44B is smaller than the reduced diameter ratio of the second reduced diameter surface 44C, that is, the outer diameter of the first reduced diameter surface 44B changes more gradually. On the other hand, the outer diameter of the second reduced-diameter surface 44C may change more rapidly. In this case, when the stopper 43 is attached to the support shaft 42, the C-ring 44 is more easily elastically deformed, so that the ease of attachment can be improved. On the other hand, when removing the stopper 43 from the support shaft 42, the elastic deformation of the C-ring 44 is less likely to occur, and the stopper 43 can be more reliably prevented from unintentionally detaching from the support shaft 42.

  (C) In the above embodiment, the basin 100 is illustrated as the tub, but the tub to which the technical idea of the present invention can be applied is not limited to the basin. Therefore, for example, the technical idea of the present invention may be applied to a bathtub or a kitchen sink.

  (D) In the above embodiment, the drainage port 102 is configured to be closed by the stopper lid 43 (the packing part 43B) coming into contact with the bottom wall part 101, but the stopper lid 43 (the packing part 43B) is configured. The drain port 102 may be closed by contacting a member provided in the basin 100 (for example, a cylindrical drain port member inserted into the drain port 102).

  (E) In the above embodiment, the stopper 43 is configured to move up and down by the support protrusion 31 that rotates and moves up and down. However, the structure for moving the stopper 43 up and down is limited to this. Not something. Therefore, for example, the stopper 43 is moved upward by lifting the support shaft by the end of the transmission member 9, and the stopper 43 is moved downward by releasing the support of the support shaft by the transmission member 9. You may comprise.

  Further, the stopper 43 does not need to be moved downward by gravity. For example, by applying a downward force to the support shaft 42 by a predetermined return force applying member (for example, a spring member or the like). Alternatively, the stopper 43 may be configured to move downward.

DESCRIPTION OF SYMBOLS 1 ... Drainage plug apparatus, 42 ... Support shaft, 42A ... Groove part, 43 ... Plug lid, 43A ... Main body part, 43C, 43T ... Mounting cylinder part, 43E ... Small diameter part, 43F ... Large diameter part, 43S ... Slit, 44 ... C-ring, 100 ... wash basin (tank), 102 ... drain outlet.

Claims (2)

A rod-shaped support shaft supported in a vertically movable manner at a drain port of the tank body,
A stopper attached to the tip of the support shaft, for opening and closing the drain port,
A drain plug device in which the drain port is opened and closed with the vertical movement of the support shaft,
The stopper is,
A disk-shaped body,
A tip portion of the support shaft includes a hole that can be inserted therethrough, and has a tubular mounting tubular portion provided at a central portion on the back surface of the main body portion,
On the inner circumference of the mounting cylinder,
A small diameter portion located on the opening side of the hole,
The inner diameter of itself is made larger than the inner diameter of the small diameter part, and the large diameter part adjacent to the small diameter part is formed on the side opposite to the opening of the hole part,
An annular groove is formed at the tip of the support shaft, and a resin C-ring that is elastically deformable in the radial direction is arranged in the groove.
The C ring is configured to be able to pass through the small diameter portion by being elastically deformed inward in the radial direction,
The tip of the support shaft and the C-ring are inserted through the hole, and the C-ring is placed in the large-diameter portion, whereby the support shaft is prevented from coming off from the hole. In the state, the stopper is attached to the tip of the support shaft ,
The large diameter portion is formed closer to the opening side of the hole than a center along the depth direction of the hole,
A drain plug device , wherein the tip surface of the support shaft is configured to be in contact with or close to the main body in a state where the stopper is attached to the tip portion of the support shaft . The mounting tube portion extends in its own axial direction and includes a slit that opens at a tip portion, and is made of an elastically deformable resin,
2. The drainage plug device according to claim 1, wherein at least the inner diameter of the small-diameter portion can be enlarged by widening the slit along with the elastic deformation of the mounting tube portion. 3.

Images