Toto Ltd.

Koki Shinohara

Hideki Tanimoto

Kenji Hatama

Yukinori Kubozono

Makoto Abe

Hiroshi Hashimoto

Masahiro Kuroishi

Hidekazu Kitaura

Nobuhiro Hayashi

Akihiro Shimuta

Takashi Yoshioka

Seika Tatsuoka

Mayu Okubo

Jing Chen

Hisashi Koga

Masateru Shiraishi

Atsuko Yamasaki

Takashi Oogami

Yoshitaka Tsuru

A flush water tank apparatus has a reservoir tank, a discharge valve, a discharge valve hydraulic drive portion configured to drive the discharge valve, and a discharge/vacuum break valve device configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder, and a piston configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.

Flush water tank apparatus and flush toilet apparatus provided with the same

The present invention provides a flush water tank device (), including: a flush water tank (); a discharge valve () that causes the lower spout port to eject the flush water by switching between discharge and stopping of the flush water; a water pressure driving mechanism () that drives the discharge valve with a water supply pressure; a first on-off valve () that switches between water ejection and stopping of the flush water; a second on-off valve () that switches between water supply and stopping of the flush water to the water pressure driving mechanism; and a delay valve opening mechanism () that causes the second on-off valve to open with a delay of predetermined time after water ejection from the upper spout port is started, using a part of the flush water introduced via the first on-off valve, to supply the flush water to the water pressure driving mechanism.

Flush water tank device and flush toilet apparatus provided with the same

The present invention provides a flush water tank device () that supplies flush water to an upper and lower spout port of a flush toilet () including; a flush water tank (); a discharge valve (); a first on-off valve () that performs switching between ejection and stopping of the flush water from the upper spout port; a first on-off valve driving mechanism () that is moved from a stopped position to an ejection position based on an user operation; a biasing mechanism () that causes the first on-off valve driving mechanism to move to the stopped position; a holding mechanism () that holds, at the ejection position, the first on-off valve driving mechanism at the ejection position against the bias force; and a releasing mechanism () that releases the holding of the first on-off valve driving mechanism, using the flush water flowing out from the first on-off valve.

Provided are a flush water tank apparatus capable of restraining instability of an operation of a piston and restraining fluctuations in a water pressure of flush water discharged from a first discharge part provided separately from an inlet, and a flush toilet apparatus including the flush water tank apparatus. A discharge valve hydraulic drive portion of a flush water tank apparatus of the present invention includes a cylinder, a piston, and a rod extending from the piston through a through-hole portion formed in the cylinder, the cylinder including an inlet into which flush water flows, a first discharge part that is provided separately from the inlet to drain the flush water, and a second discharge part that is provided separately from the first discharge part and is formed between the rod and the through-hole portion and between the piston and the through-hole portion.

There are provided a flush water tank apparatus capable of reducing a pressure of flush water in a pressure chamber easily, and a flush toilet apparatus provided with the same. A discharge valve hydraulic drive portion of a flush water tank apparatus includes a cylinder in which supplied the flush water flows, a piston that is slidably disposed in the cylinder, partitions inside of the cylinder into a pressure chamber and a back pressure chamber, and further is moved from a first position to a second position by a pressure of the flush water that has flowed into the pressure chamber, an outflow portion from which the flush water in the cylinder flows out, and a communication mechanism that establishes communication between the pressure chamber and the outflow portion after the clutch mechanism is disengaged.

A discharge valve operating device includes an electric operation unit including a rotating shaft, a first coupling member and a second coupling member having respective one ends coupled to a discharge valve, a first rotary winding member, and a second rotary winding member. The first rotary winding member and the second rotary winding member include a first holed portion and a second holed portion, respectively, which are provided near portions at respective rotation centers. Each holed portion is engageable and disengageable with the rotating shaft in a rotation direction in accordance with the rotation direction of the rotating shaft in each operation mode.

Discharge valve operating device, flush water tank device, and flush toilet

A discharge valve apparatus attached to a reservoir tank in a reservoir tank apparatus for storing flush water. The discharge valve apparatus includes a valve body, attached to the top of a discharge opening provided in the bottom surface of a reservoir tank, for opening and closing the discharge opening by up and down movement thereof, a float, attached to the valve body, which drops in tandem with the drop in water level inside the flush water tank; and a variable drop start timing mechanism to make a drop start timing of the valve body variable.

Discharge valve apparatus, flush water tank apparatus, and flush toilet

A discharge valve apparatus includes a discharge main body, disposed above a flush water tank discharge port, for opening and closing the flush water tank discharge port by the up and down motion of a valve body disposed inside a casing; wherein the discharge main body includes an attachment portion allowing an operating wire extending from a wire pull-up operating apparatus to detachably attach to a valve body portion.

An operating device for a flush water tank assembly includes: a rotary shaft, an operating handle, an operating wire, and a drive unit, wherein the drive unit includes: a rotary member, a rotary winding member, a locking unit for mutually locking the rotary member and the rotary winding member when the rotary winding member rotates in a forward rotational direction from operating position Pand reaches operating position P, and a lock release portion for releasing the lock between the rotary member and the rotary winding member when the rotary member and the rotary winding member rotate in a forward rotational direction from operating position Pand reach operating position P

Operating device for flush water tank assembly, flush water tank assembly, and flush toilet

A drain valve device includes a valve body and a lift part. The valve body plugs a drain outlet arranged on a bottom surface of a tank. The lift part is configured to lift the valve body. The lift part includes an engagement part. The engagement part engages with the valve body at a first height and releases engagement of the engagement part with the valve body at a second height. The second height is greater than the first height.

Drain valve device, wash water tank device and flush toilet

An operating device includes a rotary shaft, an operating handle, an operating wire, and a drive unit; wherein this drive unit includes: a rotary member, a rotary windup member, a locking device for mutually locking the rotary member and the rotary windup member until the rotary windup member rotates in the forward rotational direction from a first operating position and reaches a second operating position, a lock release device for releasing the lock between the rotary member and the rotary windup member so the rotary windup member rotates in the reverse rotational direction and moves to the first operating position regardless of any operation of the operating handle when the rotary member and the rotary windup member reach the second operating position, and a biasing device for restoring the rotary member to an initial position at which a toilet flush operation can be started from the operating position.

Operating device, flush water tank device, and flush toilet

A discharge valve apparatus of the present invention includes: a discharge portion main body member attached to discharge opening, forming the inside of discharge flow path for guiding flush water from an inflow opening formed at one end thereof to an outflow opening formed at the other end thereof; a valve body for opening and closing the inflow opening of the discharge portion main body member; and an affixing portion, formed to project into the discharge flow path of a discharge portion main body member, for affixing the discharge portion main body member to a reservoir tank; wherein the inside surface of side wall portion in the discharge portion main body member at the same height as this affixing portion forms a curved portion, which curves outward so as to expand the cross-sectional area of the flow path.

Discharge valve apparatus and one-piece flush toilet including same

Problem: To provide a discharge valve apparatus able to be disposed on a flush toilet with a relatively low silhouette by shortening the length of the valve body main shaft and lowering the height of the discharge valve apparatus. Solution Means: A discharge valve apparatus having: a small-flush float mechanism and a large-flush float mechanism; wherein the valve body main shaft includes a single shared projecting portion which locks to the large-flush cam lock portion when the required amount of pull-up for the large-flush mode has been pulled up, and locks to the small-flush cam lock portion when the amount of pull-up required for the small-flush mode has been pulled up.

Discharge valve apparatus, flush water tank apparatus comprising this discharge valve apparatus, and flush toilet comprising this flush water tank apparatus

A flush operating apparatus includes: a flush valve for opening and closing a discharge port on a storage tank; a manual operating unit, provided on the flush water tank and capable of manually operating the motion of the flush valve; a powered operating unit capable of operating the motion of the flush valve with power; and a control device for receiving a toilet flush start signal transmitted from either an instruction device by which a user instructs a toilet flush operation, or from a body sensor for sensing a user and activating a power drive motor; wherein the powered operating unit is separately installed from the manual operating unit, and is installed so as to be removable from the flush water tank in accordance with flush water tank apparatus or toilet main unit usage conditions.

Flush operating apparatus and toilet apparatus including same

A flush water volume regulator is provided, capable of constraining the occurrence of a buoyancy force acting on a water reservoir, whereby flush water in the water reservoir can be circulated with flush water in a flush water tank outside the water reservoir. The flush water volume regulatorof the invention has a water reservoir, being a water reservoirdisposed inside this flush water tank, capable of storing a predetermined amount of flush water, on which an openingthrough which flush water within water reservoirand flush water outside water reservoircan pass, and an opening-closing valvefor openingduring the standby state before starting a flush and for blocking openingor reducing the opening surface area of openingwhen the water level inside flush water tankis dropping after starting a flush.

Flush water volume regulator, flush water tank apparatus comprising said flush water volume regulator, and flush toilet comprising said flush water tank

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Kitakyushu, Japan

Koki Shinohara