JPH0712679U - Ceramic disc type valve - Google Patents

Abstract

(57) [Abstract] [Purpose] In a ceramic disc type valve, the operating resistance when rotating a movable ceramic disc by a rotating operation shaft is reduced, and the valve can be operated smoothly even with a weak operating force. A rolling ball 52 is interposed between a pair of engaging surfaces 48, 50 of a rotating operation shaft 42 for rotating the movable ceramic disk 28 and a casing 22, which engage with each other. The rolling action reduces the rotational resistance of the rotary operation shaft 42.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a ceramic disc type valve.

[0002]

[Background of device]

 Various types of structures and forms are known for valves in faucets. One of them is a pair of ceramic discs, that is, a fixed ceramic disc and a rotatable movable ceramic disc. By rotating the movable ceramic disc, the communication passages formed in the respective ceramic discs are connected and cut off, There is a type that connects or cuts off the upstream water passage and the downstream water passage of each ceramic disk.

FIG. 5 shows an example of what is considered as a ceramic disc type valve of this kind. In the figure, reference numeral 100 denotes a casing arranged on a water passage 102, in which a fixed ceramic disk 104 and a movable ceramic disk 106 are arranged in a superposed state. Reference numeral 108 denotes a rotary operation shaft, the front end of which is inserted into the casing 100 and is connected to the movable ceramic disc 106 in an integrally rotatable state.

In the case of this ceramic disc type valve, when the movable ceramic disc 106 is rotated by the rotary operation shaft 108, the connecting passages 110 and 112 of the fixed ceramic disc 104 and the movable ceramic disc 106 coincide with each other, that is, communicate with each other. In this state, the upstream and downstream parts of the ceramic discs 104, 106 in the water passage 102 are connected, and when the movable ceramic disc 106 is further rotated from the same position, the communication passages 110, 112 become non-communicated again. The water passage 102 is cut off. That is, this ceramic disc type valve has a structure in which the water passage 102 is opened and closed by the rotation of the movable ceramic disc 106.

The rotary operation shaft 108 and the casing 100 are formed with engagement surfaces 114, 116 extending in a direction perpendicular to the axis for receiving a load based on water pressure acting on the rotary operation shaft 108. Engaged.

[0006]

[Problems to be solved by the device]

 By the way, in this kind of ceramic disc type valve, when the water pressure is relatively low, it is good, but when the water pressure becomes high or when it is used in a place where the water pressure is high, the engagement surface of the rotation operation shaft 108 and the casing 100 is There is a problem that relative rotation between 114 and 116 increases the sliding resistance, which makes the operation of the valve heavy.

Therefore, when it is difficult to apply a strong operating force to the rotary operation shaft 108, for example, when the valve is used smoothly as a valve in a ball tap for supplying water to a tank for storing flush water of a toilet bowl, the valve is smoothly operated. It can happen that it cannot be activated.

[0008]

[Means for Solving the Problems]

 The ceramic disc type valve of the present invention has been devised to solve such a problem, and its gist is (a) a casing provided on a water passage and (b) an internal passage of the casing. A fixed ceramic disc that is fixedly positioned across the waterway; (c) a movable ceramic disc that is rotatably disposed in the casing in a superposed state with the ceramic fixed disc; and (d) a tip. And a rotary operation shaft for rotating the movable ceramic disc based on an applied operation force, the portion being inserted into the casing and connected to the movable ceramic disc in an integrally rotating state. Communication passages for connecting / disconnecting the upstream water passage and the downstream water passage are formed on the disc. The rotary operation shaft and the casing are formed with an engagement surface extending in a direction perpendicular to the axis for receiving a force based on water pressure acting on the rotation operation shaft, while being connected / disconnected based on the rotation of the movable disk. In addition, a gap is formed between the engagement surfaces, and rolling balls are arranged in the gap portion so that the engagement surfaces are engaged with each other through the rolling balls. .

[0009]

[Action and effect of the device]

 As described above, according to the present invention, the rolling balls are interposed between the engaging surface of the rotary operation shaft and the corresponding engaging surface of the casing. According to the present invention, the rolling action of the rolling balls Thus, the rotational sliding resistance between the engagement surface of the rotary operation shaft and the engagement surface of the casing can be effectively reduced.

Therefore, even when the water pressure is high or when it is used in a place where the water pressure is high, the movable ceramic disk can be lightly rotated. In addition, the valve can be operated smoothly even when the force applied to the rotary operation shaft is weak.

[0011]

【Example】

 Next, an embodiment in which the present invention is applied to a valve in a ball tap for supplying water to a tank storing toilet flush water will be described in detail with reference to the drawings. In FIG. 2, 10 is a low tank for storing flush water in the toilet 12, and 14 is a ball tap.

The ball tap 14 supplies water from the water supply pipe 16 into the low tank 10 when the inside of the low tank 10 becomes empty, and stops the water supply at a predetermined water level. Specifically, when the inside of the low tank 10 becomes empty, the float 18 descends, and the float 18 opens the valve of the ball tap 14 via the arm 20.

When the water level rises due to the water supply, the float 18 rises to close the valve and stop the water supply.

FIG. 1 shows a specific structure of the valve in the ball tap 14. In the figure, reference numeral 22 denotes a metal casing (which may be made of resin) in the valve. The casing 22 is constructed by joining the divided bodies 22a and 22b to each other at their mating surfaces with a packing 24 therebetween.

Inside the casing 22, a fixed ceramic disk 26 and a movable ceramic disk 28 are arranged in a superposed state. The fixed ceramic disk 26 is fixed in position, and the movable ceramic disk 28 is rotatable.

In the fixed ceramic disc 26 and the movable ceramic disc 28, communication passages 30 and 32 for connecting the disc upstream side portion 36 a and the downstream side portion 36 b of the water passage 36 are formed. Based on the rotation of the disk 28, the communication passages 30 and 32 are communicated with each other and cut off from each other. That is, the water passage 36 is connected or disconnected.

It should be noted that each of the fixed ceramic disk 26 and the movable ceramic disk 28 has a recess 34 formed in the mating surface as shown in FIG. These recesses 34 are for reducing the contact area between the ceramic disks 26, 28 and for reducing the rotational sliding resistance of the movable ceramic disk 28.

Reference numeral 42 denotes a rotary operation shaft, the tip of which is inserted inside through a through hole 43 of the casing 22. A large-diameter tubular portion 44 is formed at the tip of the rotary operation shaft 42, and the tip of the tubular portion 44 is connected to the movable ceramic disk 28 in an integrally rotating state. The internal space of the tubular portion 44 constitutes a part of the water passage 36.

On the other hand, the arm 20 is connected via a ring-shaped portion 45 to the portion of the rotary operation shaft 42 that projects to the outside of the casing 22. Thus, the rotary operation shaft 42 is formed with a flat cut-off surface 46, and the corresponding flat surface of the ring-shaped portion 45 is engaged with the cut-off surface 46 in an integrally rotating state.

The back surface (right end surface in FIG. 1) of the cylindrical portion 44 of the rotary operation shaft 42 and the portion of the casing 22 facing this are formed as engagement surfaces 48 and 50 extending in the axis-perpendicular direction. A predetermined gap is formed between the engaging surfaces 48, 50, and a plurality of rigid rolling balls 52 are arranged in the gap, and the engaging surfaces 48, 50 are formed by the rolling balls. They are engaged with each other via 52. These rolling balls 52 are held inside a holding groove formed on the rotary operation shaft 42 side as shown in FIG.

Next, the operation of the ceramic disc type valve of this example will be described. In this example, the force of the up-and-down motion of the float 18 is applied as the rotational operation force on the rotational operation shaft 42. Then, the ceramic disk 28 rotationally moves to open or close the valve.

In the valve of this example, a predetermined pressing force is generated on the engagement surface 48 of the rotary operation shaft 42 and the engagement surface 50 of the casing 22 based on the water pressure acting on the rotary operation shaft 42. Therefore, when the rotary operation shaft 42 rotates, a constant resistance force is generated. In this example, however, the rolling balls 52 are interposed between the engaging surfaces 48 and 50. Even under the action of water pressure, the rotary operation shaft 42 can gently rotate.

Therefore, even if the buoyant force acting on the float 18 or a weak force when the float 18 descends due to its own weight, the rotary operation shaft 42 can be rotationally moved without trouble, and the valve can be smoothly opened and closed. .

The embodiment of the present invention has been described in detail above, but this is merely an example. For example, in the present invention, the rolling ball 52 may be brought into contact with the rotary operation shaft 42 or the engaging surfaces 48, 50 of the casing 22 via a metal washer, or the rolling ball 52 may be held. It is also possible to provide a groove on the casing 22 side.

Further, the present invention can be applied to a valve in a faucet other than the above ball tap, and various modifications can be made based on the knowledge of those skilled in the art without departing from the spirit of the invention. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of a valve according to an embodiment of the present invention.

FIG. 2 is a view showing a ball tap provided with the valve in a mounted state on a low tank.

3 is a perspective view showing the shape of a ceramic disc of the valve shown in FIG. 1. FIG.

FIG. 4 is a view showing a main part of a rotary operation shaft of the valve in FIG.

FIG. 5 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

 10 Low Tank 12 Toilet Bowl 14 Ball Tap 22 Casing 26 Fixed Ceramic Disc 28 Movable Ceramic Disc 30, 32 Communication Passage 36 Water Passage 42 Rotating Operation Shaft 44 Cylindrical Portion 48, 50 Engaging Surface 52 Rolling Ball

Claims (1)

[Scope of utility model registration request] 1. (a) A casing provided on the water passage, (b) a fixed ceramic disk which is fixedly positioned so as to cross the internal water passage of the casing, and (c) the ceramic fixed disk. A movable ceramic disc rotatably arranged in the casing in a superposed state, and (d) a tip portion is inserted into the casing and connected to the movable ceramic disc in an integrally rotatable state, and an operating force applied thereto. A rotary operation shaft for rotating the movable ceramic disc based on the above, and the fixed ceramic disc and the movable ceramic disc respectively have communication passages for connecting / disconnecting the upstream water passage and the downstream water passage. The communication passages are formed, and the communication passages are communicated / interrupted based on the rotation of the movable disk, while the rotation operation shaft and the casing have the rotation operation. An engaging surface extending in a direction perpendicular to the axis is formed for receiving a force based on water pressure acting on the shaft, and a gap is formed between the engaging surfaces, and rolling balls are arranged in the gap portion. A ceramic disc type valve in which engagement surfaces are engaged with each other through the rolling balls.