JP2931257B2 - Simple flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple flush toilet having a rotatable flapper valve for opening and closing a discharge port of a toilet.

[0002]

2. Description of the Related Art Conventionally, as a simple flush toilet of this type, for example, Japanese Utility Model Publication No. Hei 3-15667 discloses one end of a coil spring attached to an end of a rotation shaft of a flapper valve, and the other end of the coil spring is connected to a toilet. The flapper valve is always biased in a direction to close the discharge port by a coil spring. This flapper valve is
By pulling the wire by operating the operation lever, the flapper valve is opened against the spring force of the coil spring, and when the flapper valve is opened to a predetermined position, the flapper valve is urged to open. When the flapper valve is opened by the torsion spring, the load on the wire and the operation lever is reduced, so that the wire and the operation lever can be prevented from being damaged.

[0003]

However, in the prior art,
Since the wire of the operation lever that opens the flapper valve is directly connected to the rotation axis of the flapper valve, if the flapper valve freezes in winter, even if the operation lever is operated, the flapper valve will not be able to rotate. When the operation lever is operated, an overload is applied to the wire, the flapper valve, and the operation lever, and the wire, the operation lever, and the like are damaged, and a problem occurs.

[0004] The present invention has been made in view of the above points, and it is an object of the present invention to operate a control lever when a flapper valve is frozen.
Another object of the present invention is to provide a simple flush toilet capable of preventing an overload from acting on a flapper valve and preventing a failure due to breakage of a wire or an operation lever. Prevent it from closing vigorously,
The purpose of the present invention is to provide a simple flush toilet that can prevent the occurrence of splashing in the toilet and the generation of a loud impact sound.The other purpose is to prevent the flapper valve from closing vigorously. Another object of the present invention is to provide a simple flush toilet capable of maintaining the total rotation speed of the flapper valve cam at a speed equal to or higher than a certain value and improving the closing property of the flapper valve. Another object of the present invention is to provide a simple flush toilet in which the contact between the stopper cam and the flapper valve cam is weakened so that the flapper valve can be gently rotated. It is an object of the present invention to provide a simple flush toilet that is capable of preventing impact from being applied to the flapper valve and the valve case, respectively.
An object of the present invention is to provide a simple flush toilet capable of preventing buckling of a wire even when a flapper valve is pressed by a cleaning rod or the like during toilet cleaning.

[0005]

According to the present invention, a flapper valve cam 4 is mounted on a rotating shaft 30 of a flapper valve 3 which opens and closes a discharge port 2 of a toilet bowl 1. The flapper valve is connected to a wire 6 connected to an operating lever for opening and closing operation, and a stopper cam 5 formed separately from the flapper valve cam 4 and rotatably attached to a position near the flapper valve cam 4. Cam 4
Is urged only in a direction to close the flapper valve 3 by an external force applied from the stopper cam 5, and
The flapper valve 3 is provided with a valve opening means for urging the flapper valve 3 in the opening direction when the external force from the stopper cam 5 is released. With this configuration, the flapper valve 3 freezes in winter, for example. In this case, even if the operation lever is forcibly operated, the wire 6 is pulled and the stopper cam 5 only rotates.
Further, since only the load by the valve opening means is applied to the flapper valve 3, the wire 6, the operating lever, and the flapper valve 3 are not overloaded, so that the wire 6, the operating lever, and the like are not damaged. Can be prevented.

Further, it is preferable to provide a deceleration means for reducing the rotation speed when the flapper valve 3 approaches a fully closed state. In this case, the flapper valve 3 can be prevented from closing vigorously. Water splashing in 1 becomes less likely to occur, and generation of loud impact noise can be prevented. Also the stopper cam in a position distant from the rotation center N ₁ of the 5 first per unit 8, the second cam surface 1 at a position closer to the rotation center N ₁
1 are respectively provided, and the rotation center N ₂ of the flapper valve cam 4 is provided.
The first cam surface 10, the second contact portion 9 distant <br/> position from the rotation center N ₂ is respectively provided, the rotation range extending fully closed from the fully open state of the flapper valve 3 at a position closer to the However, the first contact area 8 of the stopper cam 5 comes into contact with the first cam surface 10 of the flapper valve cam 4 from the start end 10a to the end 10b, and the first rotation range, The contact portion 8 is the first cam surface 1 of the flapper valve cam 4
0 of the flapper valve cam 4 and the second cam surface 11 of the stopper cam 5
And the third contact area where the second contact portion 9 of the flapper valve cam 4 abuts from the start end 11a to the end 11b of the second cam surface 11 of the stopper cam 5. In this case, the rotation ratio of the flapper valve cam 4 to the stopper cam 5 is large in the first rotation range, so that the rotation speed of the flapper valve 3 increases, Meanwhile, the third
Since the rotation ratio of the flapper valve cam 4 to the stopper cam 5 becomes smaller in the rotation range of, the flapper valve 3 can be prevented from vigorously closing when the flapper valve 3 approaches a fully closed state, and the flapper valve cam 4 can be prevented from closing. It is possible to maintain the total rotational speed of the motor at a speed equal to or higher than a certain value. Moreover, in the third rotational range at a position near the fully closed position, the rotation center N ₁ of the second contact portion 9 a stopper cam 5 remote from the rotation center N ₂ of flapper valve cam 4
By contacting the second cam surface 11 at a position close to the flapper valve cam 4, the moment generated on the flapper valve cam 4 increases, and therefore, the stopper cam 5 at a position close to the fully open position.
As a result, a large return force (clamping force) is obtained, so that the closeability of the discharge port 2 by the flapper valve 3 can be greatly improved. Further, in the second rotation range, the transition from the contact state between the first contact portion 8 and the first cam surface 10 to the contact state between the second contact portion 9 and the second cam surface 11 is performed. By performing the operation smoothly, the deceleration of the flapper valve 3 is performed smoothly.

Preferably, the first contact portion 8 of the stopper cam 5 is formed of a roller. In this case, the first contact portion 8 of the stopper cam 5 and the flapper valve cam 4
And the first cam surface 10 can be weakened, and the flapper valve 3 can be rotated slowly. Further, the flapper valve 3 is housed in the valve case 12, and it is preferable to provide a buffer member 13 on the lower surface side of the flapper valve 3 so as to elastically contact the inner wall 12c of the valve case 12 when the flapper valve 3 is opened. When the flapper valve 3 is opened by the member 13, no unpleasant sound is generated, and it is possible to prevent the flapper valve 3 and the valve case 12 from being subjected to an impact.

It is preferable that the end 6a of the wire 6 is slidably connected and held in a connecting hole 14 provided in the stopper cam 5 in a slidable manner.
In this case, even when the flapper valve 3 is pressed with a cleaning rod or the like at the time of cleaning the toilet, the end 6 a of the wire 6 slides along the connecting hole 14 of the stopper cam 5,
Buckling of the wire 6 can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 shows a simplified flush toilet 1 according to the present embodiment.
As shown in FIG. 13, a discharge port 2 is provided at the center of the bottom, and a connecting member 15 is attached below the discharge port 2 via a sealing material 28 such as an adhesive.

The connecting member 15 is formed in an annular shape along the periphery of the discharge port 2, and a screw 16 is screwed into a nut 17 fixed to a connecting portion of the toilet 1 through the connecting member 15. 15 is fixed to the toilet 1. Connecting member 15
A seal member 18 is disposed below the seal member 18. Seal material 1
Reference numeral 8 denotes an annular shape along the periphery of the opening of the connecting member 15, and a locking groove 19 is formed in the outer periphery so as to cover the entire periphery. The sealing material 18 is entirely formed of an elastic material such as rubber, and is, for example, a mixture of EPDM and SBR. The seal member 18 is supported by a seal support member 20. The seal supporting member 20 is connected to the connecting member 15.
Is formed in a ring shape along the opening, and the whole is formed of a synthetic resin such as polypropylene containing glass fiber. A locking edge 21 (FIG. 13) is provided on the inner circumference of the seal support member 20 so as to cover the entire circumference. A screw 22 is inserted through the seal support member 20 from below the seal support member 20 in a state where the lock edge 21 is locked in the lock groove 19 of the seal member 18, and the screw 22 is screwed into the connection member 15. The sealing support member 20 is attached to the connecting member 15 by the joining, whereby the upper edge 18
a comes into contact with the lower surface of the periphery of the opening of the connecting member 15, and the upper surface of the flapper valve 3 can come into contact with the lower edge 18 b of the sealing material 18 so as to be able to freely contact and separate. The valve case 12 is disposed below the sealing member 18. A screw 25 is inserted from below the screw insertion hole 12b provided in the flange 12a at the upper end of the valve case 12, and the screw 25 is screwed into the connecting member 15, whereby the valve case 12 is fixed to the connecting member 15. I have. Further, between the flange 12a of the valve case 12 and the connecting member 15, FIG.
As shown in FIG. 5, a valve case sealing material 26 for sealing between the valve case 12 and the connecting member 15 is interposed.

A flapper valve 3 is disposed in the valve case 12 so as to be rotatable up and down. Flapper valve 3
As shown in FIG. 13, a rotating shaft 30 having both ends rotatably supported on both sides of the valve case 12 and an arm portion 31 having a base end fixed to the rotating shaft 30 are provided. The flapper valve 3 is attached to the tip of the arm 31. The lower part of the flapper valve 3 is provided with an arm 3
A boss 33 which is inserted with some play into a valve mounting hole 32 provided at the end of the valve mounting hole 32 projects from the valve mounting hole 32.
A washer 34 is attached to the tip of a boss 33 projecting downward. By attaching one portion of the flapper valve 3 to the arm portion 31 in this manner, the flapper valve 3 can be attached in a state where the flapper valve 3 can be tilted slightly. Therefore, when the valve is closed, the flapper valve 3 is attached to the connecting member 15. The lower end edge 18b of the attached seal member 18 can be easily adhered without any gap. Further, a cushioning member 13 made of an elastic material such as rubber is attached to the tip of the arm 31. As shown in FIG. 10, the cushioning member 13 is formed in a substantially cylindrical shape, and has a fitting groove 13 fitted at a top end thereof into a fitting hole provided at a tip end of the arm portion 31.
a is recessed. The lower part of the cushioning member 13 is the arm 3
1 projects below the lower surface of the flapper valve 3 and the lower surface of the flapper valve 3. When the flapper valve 3 is fully opened, the lower portion of the buffer member 13 elastically contacts the inner wall 12c of the valve case 12, so that the flapper valve 3 It serves to avoid colliding with the valve case 12.

The rotation shaft 30 of the flapper valve 3 is connected to a wire 6 of an operation lever (not shown) via a cam mechanism 35 described later. As shown in FIGS. 12 and 14, the wire 6 is housed in a wire guide 50 routed from the front to the back of the toilet 1, and the tip of the wire 6 is connected to the operation lever. The cam mechanism 35, as shown in FIG.
The flapper valve 3 includes a flapper valve cam 4 attached to a rotating shaft 30 of the flapper valve 3 and a stopper cam 5 operated by a wire 6. The flapper valve cam 4 and the stopper cam 5 are formed separately, and the stopper cam 5 is rotatably supported by the valve case 12 at a position near the flapper valve cam 4. By thus configuring the stopper cam 5 and the flapper valve cam 4 separately,
For example, when the flapper valve 3 freezes, the overload due to the operation of the operation lever can be prevented from being applied to the wire 6, the operation lever, and the flapper valve 3.

[0013] Here, the stopper member 5, as shown in FIG. 2, is formed in a substantially inverted L-shape, rotatably supported shaft hole portion 5a serving as a rotation center N ₁ is the side wall of the valve case 12 In this embodiment, the operation angle of the stopper cam 5 is set to about 40 ° (fully closed angle 0 ° to fully opened angle 40 °). A spring 36 is mounted around the shaft hole 5a of the stopper cam 5. This spring 36
Is for acting in the direction to close the flapper valve cam 4 via the stopper cam 5, and one end 36a of which is
The other end 36 b is supported by the support portion 60 provided on the stopper cam 5, and the flapper valve 3 is constantly urged in the closing direction via the spring 36.

At the lower end of the vertical portion 5b of the stopper cam 5, as shown in FIGS.
Is provided with a connection hole 14 to which the end 6a is connected. The hole 14 includes a slit 14a into which the wire 6 is inserted from the outside, and an insertion hole 14b into which the wire 6 is slidably inserted. A wire stopper 37 having a larger diameter than the hole 14 is provided at the tip of the wire 6, so that the end 6 a of the wire 6 is
And is slidably connected to and held in the hole portion 14 in a state where the hole 14 does not come off.

A first contact portion 8 is provided at the tip of the horizontal portion 5c of the stopper cam 5, as shown in FIGS. 2 (a) and 2 (d). The first butting portion 8 is arranged at a position far from the rotation center N ₁ of the stopper cam 5. In the present embodiment, the first contact portion 8 is constituted by a roller 39 rotatably supported by a roller supporting portion 38, and the roller 39 is connected to the flapper valve cam 4 by the roller 39.
Can be brought into contact only with the first cam surface 10. The roller 39 is provided in a region a substantially half of the thickness of the stopper cam 5 in the thickness direction, and the second cam surface 11 is formed in a region b of the other half substantially. The second cam surface 11 is formed at a position closer to the rotation center N ₁ of the stopper cam 5 than the roller 39 along the top surface of the horizontal portion 5c of the stopper cam 5. Second cam surface 11
Is composed of a flat surface 42 and a concave curved surface 43, the flat surface 42 side being the starting end 11a of the second cam surface 11 and the concave curved surface 43 side being the terminal end 11b. Only the second contact portion 9 of the flapper valve cam 4 can be abutted from the start end 11a to the end 11b. Incidentally, reference numeral 40 in FIG. 2 denotes a reinforcing rib of the stopper cam 5.

[0016] On the other hand, flapper valve cam 4, as shown in FIG. 3, is formed in a substantially triangular shape, the ends of the pivot shaft 30 of the flapper valve 3 into the shaft hole 70 serving as the rotation center N ₂ Is inserted, and a screw is screwed into a screw hole 71 provided in the shaft hole 70 so that the flapper valve cam 4 is fixed integrally with the rotating shaft 30. In the present embodiment, the operation angle of the flapper valve cam 4 is about 75 ° (fully closed angle 0 ° to fully opened angle 75 °).
Flapper valve cam 4 at all angles
Is free to rotate. That is, the spring force of the spring 36 attached to the stopper cam 5 acts on the flapper valve cam 4 to apply an external force in the closing direction to the flapper valve cam 4 as described later, and the external force from the stopper cam 5 When released
The flapper valve 3 connected to the flapper valve cam 4 rotates in the opening direction by its own weight, and the own weight of the flapper valve 3 at this time constitutes a valve opening means for urging the flapper valve 3 in the opening direction. doing.

The shaft hole 70 of the flapper valve cam 4 (during rotation)
Heart N_TwoThe first cam surface 10 and the second cam surface 10
Contact portion 9 is provided. Note that 41 in FIG.
The recess where the first contact portion 8 of the topper cam 5 can enter
is there. The first cam surface 10 of the flapper valve cam 4 is shown in FIG.
As shown in (c), the flapper valve cam 4 in the thickness direction
The stopper is formed in a substantially half area b '.
It faces the first contact portion 8 of the cam 5. Also the rest
The second half of the stopper cam 5 is located in the substantially half area a '.
A second contact portion 9 facing the cam surface 11 is formed.
You. The first cam surface 10 is the center of rotation of the flapper valve cam 4
N_TwoAnd the second contact portion 9 is formed at a position close to the first
Rotation center N more than cam surface 10_TwoFormed far away from
ing. Also, the first cam surface 10 is the rotation of the stopper cam 5.
Moving center N _TwoIs the longest at the start end 10a,
Gradually shorter from the end 10a toward the end 10b
It is formed in an arcuate shape so that
To increase the rotation speed of the flapper valve cam 4 with respect to the
And can be. Also, the second contact part 9
Is located on the side of the end portion 10b of the first cam surface 10.
The starting end 1 of the second cam surface 11 of the stopper cam 5
It is possible to contact from 1a to the end portion 11b.
You. The second contact portion 9 of these flapper valve cams 4 and the
The flapper is formed by the second cam surface 11 of the topper cam 5.
-To be able to close valve 3 at a low rotational speed
Speed-up means is provided.

Next, the operation will be described. When the operation lever is operated after the stool, the wire 6 is pulled, and FIG. 9 → FIG. 8 → FIG.
The stopper cam 5 pivots to an angle of 40 ° against the spring force of the spring 36 assembled to the stopper cam 5 in the order of FIG. 6 → FIG. 5 → FIG. 4, while the flapper valve cam 4 is 0 ° ( The flapper valve 3 is rotated from the fully closed angle) to an angle of 70 ° (fully opened angle), the flapper valve 3 is fully opened, and the toilet bowl is flushed and drained.

By dividing the stopper cam 5 connected to the wire 6 and the flapper valve cam 4 connected to the rotating shaft 30 of the flapper valve 3, the flapper valve 3 freezes in winter, for example. In this case, even if the operating lever is operated, the wire 6 is pulled and the stopper cam 5 only rotates. That is, the flapper valve 3 connected to the flapper valve cam 4 is urged in the closing direction by the external force from the stopper cam 5, but when the external force from the stopper cam 5 is released, the flapper valve 3 opens by its own weight. Even if the flapper valve 3 freezes and does not move, only the wire 6 and the stopper cam 5 are pulled by the operating lever, and the flapper valve cam 4 and the flapper valve 3 No excessive pulling force is applied from the operating lever, so that the wire 6, the operating lever, and the flapper valve 3 are not overloaded, and the wire 6, the operating lever, or the flapper valve 3 is damaged. Generation can be prevented and usability can be improved.

Further, as shown in FIG. 13, a substantially cylindrical buffer member 13 is protrudingly provided on the lower surface side of the flapper valve 3, so that even if the flapper valve 3 rotates downward by its own weight, the buffer member is provided. Since the lower portion of the valve 13 hits the inner wall 12c of the valve case 12, no unpleasant noise is generated when the flapper valve 3 is opened, and further, no impact is applied to the flapper valve 3 and the valve case 12, respectively, thereby preventing the occurrence of failure. can do.

Next, the operation when the flapper valve 3 is closed will be described. When the operation of the operation lever is released after the operation, the wire 6 is loosened, and the stopper cam 5 is moved in the closing direction by the spring force of the spring 36 in the order of FIGS. 4 → 5 → 6 → FIG. 7 → FIG. Rotate to an angle from 0 ° to 0 °, and the flapper valve cam 4
The flapper valve 3 is fully closed by rotating from an angle of 5 ° to 0 °.

Here, the rotation range from the fully open state to the fully closed state of the flapper valve 3 is such that the first contact portion 8 of the stopper cam 5 is moved from the starting end 10a of the first cam surface 10 of the flapper valve cam 4. The first rotation range (FIGS. 4 (a) to 6 (b)) in contact with the end portion 10b and the first contact portion 8 of the stopper cam 5 are formed on the first cam surface 10 of the flapper valve cam 4. A second rotation range (FIG. 7 (a)) in which the second contact portion 9 of the flapper valve cam 4 abuts on the end portion 10b and the start end portion 11a of the second cam surface 11 of the stopper cam 5 abuts. , Second contact portion 9 of flapper valve cam 4
Is the starting end 11a of the second cam surface 11 of the stopper cam 5.
And a third rotation range (FIGS. 7 (b) to 9 (b)) that abuts on the end portion 11b.

First, from 40 ° of the stopper cam 5 to 35 °
Stopper cam 5 and flapper valve cam 4 up to the angle of °
And the flapper valve cam 4
Is in a free state, and the flapper valve 3 is fully opened by its own weight. When the stopper cam 5 rotates to an angle of 35 °, the first contact portion 8 of the stopper cam 5 contacts the start end 10a of the first cam surface 10 of the flapper valve cam 4 as shown in FIG. , Flapper valve cam 4
Begins to rotate from a 75 ° angle. Then, FIG. 4 (b) →
5 (a) → FIG. 5 (b) → FIG. 6 (a), the first contact portion 8 extends from the starting end 10a of the first cam surface 10 to the end 1
0b to push up the flapper valve cam 4,
The flapper valve 3 is closed partway. At this time, the first contact portion 8 of the stopper cam 5 is a roller 39 (FIG. 2).
(C)), the roller 39 is moved while sliding on the first cam surface 10 of the flapper valve cam 4, so that the stopper cam 5 and the first cam surface 10 of the flapper valve cam 4 are moved. , The flapper valve 3 can be gently rotated, and the operability is improved.

Thereafter, when the stopper cam 5 rotates to an angle of 23 °, the angle of the flapper valve cam 4 becomes 25 °, and as shown in FIG. 6B, the first contact portion 8 of the stopper cam 5 is First cam surface 1 of flapper valve cam 4
0 of the flapper valve cam 4 and the second cam surface 1 of the stopper cam 5
1 comes into contact with the start end 11a. in this way,
Before the first contact portion 8 of the stopper cam 5 separates from the first cam surface 10 of the flapper valve cam 4, the second contact portion 9 of the flapper valve cam 4 contacts the second cam surface 11 of the stopper cam 5. Thereby, the transition from the contact state between the first contact portion 8 and the first cam surface 10 to the contact state between the second contact portion 9 and the second cam surface 11 can be smoothly performed. become.

Further, when the stopper cam 5 rotates to an angle of 20 °, the angle of the flapper valve cam 4 becomes 22 °, and as shown in FIG.
Contact portion 8 is the first cam surface 10 of the flapper valve cam 4
And only the second contact portion 9 of the flapper valve cam 4 is replaced by the second cam surface 11 of the stopper cam 5.
From the start end 11a toward the end 11b. When the stopper cam 5 rotates to an angle of 5 °, FIG.
As shown in (b), the angle of the flapper valve cam 4 is 10
9, and as shown in FIG. 9A, the second contact portion 9 of the flapper valve cam 4
When the cam surface 11 reaches the end portion 11b on the concave curved surface 43 side, the angle of the stopper cam 5 becomes 0 °, the angle of the flapper valve cam 4 also becomes 0 °, and the flapper valve 3 is fully closed.

As described above, when the rotation angle of the stopper cam 5 is between 35 ° and 22 °, the rotation angle of the flapper valve cam 4 becomes 75 ° → 20 °, and the rotation angle of the flapper valve cam 4 and the stopper cam 5 The rotation angle ratio r (= rotation angle of stopper cam 5 / rotation angle of flapper valve cam 4) is given by r =
4.23, and the flapper valve 3 is closed at a high speed from the fully opened state to the middle. When the rotation angle of the stopper cam 5 is between 22 ° and 16 °, the rotation angle of the flapper valve cam 4 is 20 ° → 10 °, and the ratio r between the rotation angle of the flapper valve cam 4 and the rotation angle of the stopper cam 5 is r = 1.25
And the rotation speed of the flapper valve 3 becomes medium. When the rotation angle of the stopper cam 5 is between 5 ° and 0 °, the rotation angle of the flapper valve cam 4 is 10 ° → 0 °, and the ratio r between the rotation angle of the flapper valve cam 4 and the rotation angle of the stopper cam 5 is r.
Is r = 0.5, and the flapper valve 3 is decelerated when approaching the fully closed state. Therefore, water splashing in the toilet 1 is less likely to occur, and generation of loud impact noise can be prevented. Moreover, since the rotation speed of the flapper valve 3 from the fully opened state to the middle is high as described above, the total rotation speed of the flapper valve cam 4 can be maintained at a certain speed or higher, and the usability is improved. .

Furthermore, when the stopper cam 5 to moment M _S generated, the moment generated flapper valve cam 4 by the stopper cam 5 was M _F by a spring 36 assembled to the stopper cam 5, M _F
= (M _S / r), and the ratio r between the rotation angle of the flapper valve cam 4 and the rotation angle of the stopper cam 5 when approaching the fully closed position is r = 0.5 as described above. The moment M _F generated in the valve cam 4 is (M _S / 0.
5). Therefore, when approaching the fully closed position, a large return force (tightening force) can be obtained from the stopper cam 5, and the closeability of the discharge port 2 by the flapper valve 3 is greatly improved. There is no fear that the flushing water leaks from the outlet 2, and the flush water can be held in the toilet bowl 1.

Further, since the flapper valve 3 is closed by one spring 36 assembled to the stopper cam 5, the spring force (return force) of the spring 36 at the full stroke (rotation) position of the flapper valve 3 is achieved.
Can be generated, and accordingly, the operation force of the operation lever can be reduced, and the operation is further facilitated. further,
Since the end 6a of the wire 6 operated by the operating lever is slidably connected to and held in the connecting hole 14 provided in the stopper cam 5 in a locking state,
For example, even when the stopper cam 5 is forcibly rotated by pushing the flapper valve 3 with a cleaning rod or the like at the time of cleaning the toilet, the end 6a of the wire 6 extends along the connecting hole 14 of the stopper cam 5. Since the end portion 6a of the wire 6 slides and escapes from the connection portion with the stopper cam 5, buckling of the wire 6 can be prevented, which is effective in preventing failure.

In the above-described embodiment, the valve opening means is constituted by the weight of the flapper valve 3, but the invention is not limited to this.
For example, the valve opening means may be constituted by a spring or the like, that is, any structure may be used as long as the flapper valve 3 can be opened independently when the external force from the stopper cam 5 is released. Further, the rotation angle of the stopper cam 5 is set to 40
°, and the rotation angle of the flapper valve cam 4 is 75 °, but it is a matter of course that the present invention is not limited to this value.

[0030]

As described above, according to the first aspect of the present invention, the operation of attaching the flapper valve cam to the rotating shaft of the flapper valve for opening and closing the discharge port of the toilet and opening and closing the flapper valve is performed. A stopper cam which is formed separately from the flapper valve cam and is rotatably mounted near the flapper valve cam is connected to the wire connected to the lever, and the flapper valve cam is provided from the stopper cam. Valve opening means for urging the flapper valve only in the direction to close the flapper valve by the external force, and urging the flapper valve in the direction to open when the external force from the stopper cam is released. The split into a stopper cam connected to the wire of the operation lever and a flapper valve cam connected to the rotation shaft of the flapper valve, In the case where over valve is frozen,
Even if the operation lever is forcibly operated, only a load is applied to the wire and the stopper cam, and only a load is applied to the flapper valve cam and the flapper valve by the valve opening means. The overload is not applied, so that it is possible to prevent the occurrence of failure due to breakage of the wire, the operation lever, the flapper valve, etc., and the usability is improved.

Further, the invention according to claim 2 is provided with deceleration means for reducing the rotation speed when the flapper valve according to claim 1 approaches a fully closed state. As a result, it is possible to prevent the flapper valve from closing vigorously, so that the water in the toilet bowl is less likely to splash,
Generation of loud impact noise can also be prevented, and usability is improved. According to a third aspect of the present invention, a first contact portion is provided at a position far from the center of rotation of the stopper cam according to the first or second aspect, and a second cam surface is provided at a position near the center of rotation of the stopper cam. A first cam surface is provided at a position near the center of rotation of the valve cam, and a second contact portion is provided at a position far from the center of rotation of the valve cam.
The rotation range from the fully open state to the fully closed state of the flapper valve is the first rotation range where the first contact portion of the stopper cam abuts from the start end to the end of the first cam surface of the flapper valve cam. The first contact portion of the stopper cam abuts the end of the first cam surface of the flapper valve cam, and the second contact portion of the flapper valve cam abuts the start end of the second cam surface of the stopper cam. A second rotation range;
The second contact portion of the flapper valve cam is constituted by a third rotation range that abuts from the start end to the end of the second cam surface of the stopper cam.
In addition to the effects described, the rotation ratio of the flapper valve cam to the stopper cam is increased in the first rotation range, so that the rotation speed of the flapper valve is increased, while the flapper with respect to the stopper cam in the third rotation range. Since the rotation ratio of the valve cam becomes smaller, the rotation speed of the flapper valve becomes slower, and when the flapper valve approaches the fully closed state, the flapper valve is prevented from being decelerated and closed vigorously. Rotation speed can be kept at a certain speed or higher, and usability is improved. In addition, in the third rotation range near the fully closed position, the second contact portion far from the rotation center of the flapper valve cam has a second cam surface located near the rotation center of the stopper cam 5. , The moment generated in the flapper valve cam increases, and therefore, a large return force (tightening force) is obtained from the stopper cam at a position close to the fully open position. As a result, the water stored in the toilet is not leaked from the outlet, and the flush water can be retained in the toilet. Further, in the second rotation range, the transition from the contact state between the first contact portion and the first cam surface to the contact state between the second contact portion and the second cam surface is performed smoothly. Therefore, the deceleration of the flapper valve becomes smooth and the operability is improved.

According to a fourth aspect of the present invention, since the first contact portion of the stopper cam of the first aspect is constituted by a roller, in addition to the effect of the third aspect, the first contact portion of the stopper cam is provided. The contact between the flapper valve cam and the first cam surface is weakened, and the flapper valve can be gently rotated, so that the operability is further improved. According to a fifth aspect of the present invention, the flapper valve according to the first aspect is housed in a valve case, and a buffer member is provided on a lower surface side of the flapper valve so as to elastically contact an inner wall of the valve case when the flapper valve is opened. In addition to the effect of item 1, when the flapper valve is fully opened, the collision between the flapper valve and the inner wall of the valve case can be prevented by the buffer member, so that unpleasant noise does not occur when the flapper valve is opened. In addition, since no impact is applied to the flapper valve and the valve case, it is possible to prevent the occurrence of failure.

According to a sixth aspect of the present invention, the end of the wire according to the first aspect is slidably connected to and held in a connection hole provided in the stopper cam in a locking state. In addition to the effects described in Item 1, even when the flapper valve is pressed with a cleaning rod or the like when cleaning the toilet, the end of the wire slides along the connecting hole of the stopper cam, and the wire ends. Since the end portion has a structure that escapes from the connection portion with the stopper cam, it is possible to prevent buckling of the wire and prevent the occurrence of failure.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of the present invention.

2 (a) is a front view, FIG. 2 (b) is a left side view, FIG. 2 (c) is a right side view, and FIG. 2 (d) is a rear view.

3 (a) is a front view, FIG. 3 (b) is a plan view, FIG. 3 (c) is a side view, FIG. 3 (d) is a rear view, and FIG. FIG.

FIGS. 4A and 4B are explanatory diagrams of the operation when the operation angle of the stopper cam is 75 ° to 60 °.

FIGS. 5A and 5B are explanatory diagrams of the operation when the operation angle of the stopper cam is 45 ° to 40 °.

FIGS. 6A and 6B are explanatory diagrams of the operation when the operation angle of the stopper cam is 35 ° to 30 °.

FIGS. 7A and 7B are explanatory diagrams of the operation when the operation angle of the stopper cam is 25 ° to 20 °.

FIGS. 8A and 8B are explanatory diagrams of the operation when the operation angle of the stopper cam is 15 ° to 10 °.

FIGS. 9A and 9B are explanatory diagrams of the operation when the operation angle of the stopper cam is 10 ° to 0 °.

FIG. 10 (a) is a front view of the cushioning member, and FIG. 10 (b) is a plan view.

FIG. 11 is an exploded side view illustrating an attached state of the valve case.

FIG. 12 is a plan view as seen from arrow A in FIG. 11;

FIG. 13 is a cross-sectional view illustrating an attached state of the valve case.

FIG. 14 is a side view of the valve case.

FIG. 15 is an explanatory view showing a state where a valve case sealing material is placed on the upper surface of the valve case.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Toilet bowl 2 Discharge port 3 Flapper valve 4 Flapper valve cam 5 Stopper cam 6 Wire 6a End 7 Reduction means 8 First contact part 9 Second contact part 10 First cam surface 10a Start end 10b End 11 Second cam surfaces 11a beginning 11b terminal portion 12 valve casing 12c inner wall 13 center of the rotation center N ₂ flapper valve cam hole portion 30 turning axis N ₁ stopper cam of the cushioning member 14 for connecting the

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasufumi Fujinami 1-12-28 Sakaemachi, Takarazuka-shi, Hyogo Japan Cable System Co., Ltd. (72) Inventor Makoto Nakao 1-12-28 Sakaemachi, Takarazuka-shi, Hyogo Japan Cable System Co., Ltd. (56) References JP-A-54-152331 (JP, A) JP-A-54-142848 (JP, A) JP-A-61-229043 (JP, A) 45782 (JP, U) JP-A 2-116577 (JP, U) JP-A 63-91575 (JP, U) JP-B 57-50221 (JP, B2) JP-B 3-15667 (JP, Y2) J8-8406 (JP, Y2) J3-3-51426 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E03D 11/10 E03D 5/012

Claims (6)

(57) [Claims] A flapper valve cam is mounted on a pivot shaft of a flapper valve that opens and closes a discharge port of a toilet bowl, and a wire connected to an operation lever that opens and closes the flapper valve is provided separately from the flapper valve cam. A stopper cam rotatably attached to a position near the flapper valve cam is connected, and the flapper valve cam is urged only in a direction to close the flapper valve by an external force applied from the stopper cam. A simple flush toilet comprising valve opening means for urging the flapper valve in a direction to open when the external force from the cam is released. 2. A simple flush toilet according to claim 1, further comprising a speed reducing means for reducing a rotation speed of the flapper valve when the flapper valve approaches a fully closed state. 3. A first contact portion is provided at a position far from the center of rotation of the stopper cam, and a second cam surface is provided at a position near the center of rotation of the stopper cam, and the second cam surface is provided at a position near the center of rotation of the flapper valve cam. The first contact surface is provided at a position far from the center of rotation, and the second contact portion is provided at a position far from the center of rotation. A first rotation range in which the first cam surface abuts from the start end to the end of the first cam surface; a first contact portion of the stopper cam abuts an end portion of the first cam surface of the flapper valve cam; A second pivot range in which the second contact portion of the cam abuts the start end of the second cam surface of the stopper cam; and the second contact portion of the flapper valve cam is the start end of the second cam surface of the stopper cam. From the end to the end Claim 1 or 2 simple flush toilet bowl according to, characterized in that it is composed of a range of rotation. 4. A simple flush toilet according to claim 3, wherein the first contact portion of the stopper cam is constituted by a roller. 5. The flapper valve is housed in a valve case,
The simple flush toilet according to claim 1, wherein a buffer member is provided on the lower surface side of the flapper valve so as to elastically contact the inner wall of the valve case when the flapper valve is opened. 6. A simple flush toilet according to claim 1, wherein an end of the wire is slidably connected to and held in a connecting hole provided in the stopper cam so as not to come off.