JPH0726465Y2 - Automatic drain plug - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an opening / closing mechanism of an automatic drain plug arranged at the bottom of a bathtub.

[Prior art]

Conventionally, as an opening / closing mechanism for an automatic drain plug provided at the bottom of a bathtub, it is provided at the bottom of the bathtub a as described in, for example, Japanese Utility Model Publication No. 63-83088 (see FIG. 5). In addition, a drain plug c for vertically moving up and down to open and close the drain b is installed in the drain outlet b so that it can move up and down. Are formed.

The cam g is in contact with the lower surface of the contact part f, and the cam g is rotated by the rotation of the drive shaft h to move the drain plug c up and down via the contact part f and the stem d. Open and close the drain b.

The drive shaft h is connected to the output shaft k of the motor j via the clutch means i, and the clutch means i blocks the power transmission from the output shaft k of the motor j when an overload is applied to the cam g or the like. To do.

[Problems to be Solved by the Invention] However, the above-described conventional opening / closing mechanism of the automatic drain plug closes the drain outlet b by the dead weight of the drain plug c at the time of water stop, and therefore has a problem of poor sealing property. there were.

In addition, when the drain plug c is opened and closed, the motor g is attached to the cam g,
Alternatively, in order to protect the cam g, the motor j, or the transmission mechanism portion when an overload exceeding the capacity of the transmission mechanism portion is applied, clutch means i for cutting off power transmission from the output shaft k of the motor j is provided. There was a problem that it was necessary.

Further, when a load is applied to the drain plug c from the upper part in the bathtub when the drain plug c is raised to open the drain port b, if the cam g is not located at the apex, the clutch means i By interrupting the power transmission, the cam g and the drive shaft h freely rotate to lower the drain plug c, which is not important, but the cam g is located at the apex and is difficult to rotate. In some cases, the load is directly applied to the cam g and the drive shaft h, which causes a problem that the cam g is damaged or the drive shaft h is bent.

An object of the present invention is to solve the above problems, to secure a sealing pressure when water is stopped, and to prevent an opening / closing mechanism from being damaged by a high load applied to the drain plug from the bathtub during drainage. Is to provide.

[Means for Solving the Problems]

In order to achieve the above object, the automatic drain plug of the present invention includes a drain plug body that moves vertically to open and close a valve seat, and an upper end fixed to a lower portion of the drain plug body, which extends downward in the drain plug body. The vertically movable stem, the through hole formed in the stem below the drain plug body in the horizontal direction, the drive shaft extending in the horizontal direction and rotated by the power source, and the drive shaft. One end is fixed, and the other end has a highly elastic transmission part that is inserted into the through hole of the stem.

[Action]

In the automatic drain plug of the present invention configured as described above, when the drive shaft is rotated by a predetermined angle during drainage, the transmission portion comes into contact with the upper end edge of the through hole of the stem to press the stem upward, Move the drain plug upward to open the valve seat and put it in a drainage state.

When water is stopped, by rotating the drive shaft by a predetermined angle in the direction opposite to the direction of drainage, the transmission part comes into contact with the lower end edge of the through hole of the stem and pushes the stem downward to move the drain plug body. Abut on the valve seat to stop water.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, a drainage port 2 is formed in the bottom of the bathtub 1, and a drainage fitting 3 is screwed and fixed to the drainage port 2.

The drainage fitting 3 has a cylindrical shape with a bottom, and a low annular support wall 31 is formed at a position deviated from the center of the bottom portion thereof.
A drainage pipe connection hole 32 is provided at a position surrounded by, and a through hole 33 is provided at an outer position of the support wall 31.

The drain plug casing 4 is fitted and fixed in the drain fitting 3, the outer periphery 41 of the upper end of the drain plug casing 4 is in watertight contact with the upper inner wall surface of the drain fitting 3, and the lower end is supported by the support wall 31 of the drain fitting 3. It has a connection port portion 42 that is fitted and fixed in a watertight manner, and a vertical side wall 43 has a drainage chamber A that communicates with the drainage pipe connection hole 32 in the drainage fitting 3, and a through hole 33 is formed in the bottom portion. It is divided into an air chamber B.

A cylindrical bearing portion 44 having a bottom is formed so as to project toward the drainage chamber A side of the side wall 43, and the stem 6 provided in the lower portion of the drainage plug body 5 is installed in the bearing portion 44 so as to be vertically slidable. Has been done.

A cylindrical drive chamber 45 is formed in the side wall 43 orthogonal to the bearing portion 44, and an enlarged portion 46 is formed around the bearing portion 44 at substantially the same position as the drive chamber 45. The part 46 is a bearing part
44 and the air chamber B.

A valve seat 47 is formed on the upper end of the drain plug casing 4,
The outer periphery 51 of the drain plug 5 comes into contact with the valve seat 47 to stop the water.

A bearing 451 is formed at the end of the drive chamber 45 on the drain chamber A side, one end of the drive shaft 7 is rotatably supported, and the other end of the drive shaft 7 is of the motor 9 installed in the air chamber B. It is connected to the output shaft.

In the motor 9, the openings of the drive chamber 45 and the enlarged portion 46 toward the air chamber B side are closed by the mounting substrate 91 of the motor 9, and the air chamber B of the side wall 43 is closed.
The power supply cable 92 to the motor 9
Is led out to the outside through a through hole 33 on the bottom surface of the air chamber B.

After bending the substantially central portion of the high-elasticity wire to form a bent end to form a transmission portion 81, and inserting and fixing both ends 82 of the wire into the locking holes provided in the drive shaft 7, the wire is attached to the drive shaft 7. It is wound and the transmission portion 81 is projected into the bearing portion 44 (see FIG. 2).

The stem 6 of the drain plug 5 is provided with a through hole 61 having a substantially rectangular cross section that crosses the stem 6 having a small opening area on the drive chamber 45 side and a large opening area on the enlarged portion 46 side. A transmission portion 81 protruding from the shaft 7 extends through the through hole 61 (see FIGS. 3 and 4).

10 and 11 are seal packings, 12 is tightening bolts, and 13 and 14
Is an O-ring.

Next, the operation will be described. By energizing the motor 9 to rotate the drive shaft 7 by a predetermined angle, the drain plug 5
To open and close the door.

FIG. 3 shows a state in which the drain plug 5 is lowered and abuts against the valve seat 47 of the drain plug casing 4 to stop water, and the transmission portion 81 protruding from the drive shaft 7 is at the lowermost position. It abuts the lower edge of the through hole 61 of the stem 6 to press the stem 6 downward,
The drain plug 5 is held at the water stop position.

At the time of drainage, by rotating the drive shaft 7 counterclockwise by a predetermined angle, the transmission portion 81 comes into contact with the upper end edge of the through hole 61 of the stem 6 and pushes the stem 6 upward to move it. The body 5 is opened for drainage (see FIG. 4).

When the water is stopped, the drive shaft 7 is rotated clockwise by a predetermined angle so that the transmission portion 81 abuts on the lower end edge of the through hole 61 of the stem 6 and pushes the stem 6 downward to move the drain plug. The body 5 is brought into contact with the valve seat 47 to bring the water stop state shown in FIG.

Since it is configured as described above, when a load is applied to the drain plug body 5 from above in the drainage state in which the drain plug body 5 is opened, a load is applied from the drain plug body 5 to the stem 6, Since the part 81 is formed as a bent end formed by bending a substantially central part of a highly elastic wire, the transmission part 81
Can be absorbed by being elastically deformed, and failure of the opening / closing mechanism due to a load from above can be prevented.

Further, in the water-stopped state, the elasticity of the transmission portion 81 is used to press the stem 6 downward. Therefore, by increasing the rotation angle of the drive shaft 7, the transmission portion 81 pushes the stem 6 downward. It is possible to increase the pressure and improve the sealing performance when water is stopped.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

When a load is applied from above to the drain plug in the drainage state, the transmission section has high elasticity, so the load can be absorbed by elastically deforming the transmission section, and the load from above can be absorbed. It is possible to prevent the failure of the opening / closing mechanism due to the load.

Further, in the water-stopped state, the stem is pressed downward by utilizing the elasticity of the power transmission part, so that the pressing force applied to the stem from the power transmission part can be increased, and the sealing performance at the time of water stop is improved. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a sectional view of a drain plug according to an embodiment of the present invention, and FIG.
Fig. 1 is a sectional view taken along the line II-II in Fig. 1, Fig. 3 is a sectional view taken along the line III-III in Fig. 1 showing a water stopped state, and Fig. 4 is a sectional view taken along the line III-III in Fig. 1 showing a drained state. FIG. 5 is a sectional view of a conventional drain plug. 3 ... Drainage fittings, 4 ... Drainage plug casing, 5 ... Drainage plug body, 6 ... Stem, 7 ... Drive shaft, 81 ... Transmission part, 9
……motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Setsuo Yamamoto 32, Akashi-cho, Chuo-ku, Kobe, Hyogo Prefecture Stock company Noritsu (72) Hidehito Ichimaru 32, Akashi-cho, Chuo-ku, Hyogo Prefecture Noritsu Co., Ltd. (56) References Actual Open Sho 63-83089 (JP, U) Actual Open Sho 55-54483 (JP, U) Actual Open Sho 53-42044 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A drain plug that moves in the vertical direction to open and close the valve seat of the drain, and an upper end fixed to the lower part of the drain plug, which is vertically movable extending downward in the drain plug. A stem,
A through hole formed in the stem below the drain plug in the lateral direction, a drive shaft extending in the lateral direction and rotated by a power source, and one end fixed to the drive shaft, the other end being the stem. And a high-elasticity transmission part to be inserted into the through hole of the automatic drain plug.