JP2003019147A - 4-port air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously perform ON/OFF(opening/closing) of a water circuit and an air circuit in a dental treating unit by a single signal (operation). SOLUTION: A passage body part 10 has on a side surface, inflow ports 11a1 and 12a1 and outflow ports 11b2 and 12b2 to two sets of passages 11 and 12, and has an upper surface, inflow side opening ports 11a2 and 12a2 communicating with the inflow ports 11a1 and 12a1 and outflow side opening ports 11b1 and 12b1 communicating with the outflows ports 11b2 and 12b2 respectively correspondingly to the respective sets, and has on the upper surface a partition plate 13 for partitioning the opening pots correspondingly to the sets. The upper surface of the passage body part 10 is integrated with a cover member 30 having an air hole 31 by sandwiching a flexible film 20. A three-way valve 40 is controlled by an electromagnetic actuator 50, compressed air is impressed on the flexible film 30, the flexible film 20 is pushed down, the mutual opening ports 11a2 , 11b1 ; 12a2 , 12b1 are cut off, and communicate by exhausting the compressed air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 4-port air valve, for example, in a dental treatment unit, when the unit is started up, the water channel and the air channel in the unit are simultaneously operated by a single operation (work). It relates to a 4-port air valve that can be turned on and off.

[0002]

2. Description of the Related Art FIG. 2 is an overall configuration diagram showing an example of a dental treatment unit to which the present invention is applied. The dental treatment unit includes a treatment chair 1, a work table 2, a spittoon 3, an operating light 4 and an in-room light. It consists of an instrument holder 5, a foot switch 6, an instrument holder 7 for an assistant, etc. The instrument holder 5 stores various instruments 8 used in dental treatment, and as is well known, In dental treatment, a patient sits on a chair 1 and fixes his / her head on an armrest 9 to be treated. During treatment,
The surgeon moves the treatment chair 1 up and down, starts up, tilts, etc.
Treat the patient in a posture that makes it easy to treat.

[0003]

In the dental treatment unit as described above, the water circuit and the air circuit are turned on / off at the start-up of the unit in the morning before starting medical treatment. Therefore, conventionally, a solenoid valve or a manual ball valve is provided in each of the water circuit and the air circuit, and the water circuit is turned on / off and the air circuit is turned on / off separately, which makes the work troublesome. there were.

The present invention has been made in view of the above situation, and it is possible to simultaneously turn on / off (open / close) a water circuit and an air circuit in a dental treatment unit by a single signal (operation). The purpose of this is to make it easier to start up the unit.

[0005]

The invention according to claim 1 is a 4-port air valve having two sets of flow passages arranged in parallel and capable of simultaneously turning on and off the two sets of flow passages. The 4-port air valve has an inflow port and an outflow port for the two sets of flow paths on a side surface, and has an inflow side opening port communicating with the inflow port and an outflow side opening port communicating with the outflow port on the upper surface. A flow path main body portion that corresponds to each of the groups and that has a partition plate that partitions the opening on the upper surface corresponding to the combination of the flow paths, and a flexible member that covers the entire upper surface of the flow channel main body portion. A membrane, a lid member that is integrated with the flow path body portion with the flexible membrane sandwiched therebetween, and has an air hole for applying compressed air to the flexible membrane and exhausting the applied compressed air; Compressed air is attached to the flexible membrane through the air holes, and the applied air is applied to the air. A three-way valve for evacuating through, in which is characterized by consisting of an electromagnetic actuator for switching the exhaust position to exhaust the compressed air supplied with the compressed air supply position the 3-way valve.

According to a second aspect of the invention, in the first aspect of the invention, the two sets of flow paths are airtightly partitioned by the partition plate and the flexible film.

According to a third aspect of the invention, in the first or second aspect of the invention, one of the two sets of flow paths is a water flow path and the other is an air flow path. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded perspective view of an essential part for explaining an embodiment of a 4-port air valve according to the present invention (FIG. 1 (A)), and a sectional configuration view after assembly (FIG. 1 (B))
In the figure, 10 is a 4-port flow path main body, 20 is a flexible membrane, 30 is an upper lid, 40 is a three-way valve, and 50 is an electromagnetic actuator. The 4-port flow passage body 10 has two sets of flow passages, for example, a flow passage 11 for water and a flow passage 12 for air, and has inlets 11a ₁ ,
12a ₁ and outlets 11b ₂ and 12b ₂ . On the upper surface of the flow path body portion 10, each of the inflow ports 11a ₁ ,
12a ₁ and open ports 11a ₂ , 11b ₁ , 12a ₂ , 12b ₁ communicating with the outlets 11b ₂ , 12b ₂
The inflow port 11a ₁ and the open port 11a ₂ communicate with _{each other} through the flow channel 11 ₁ provided in the flow channel body portion 10, and the open port 11b ₁
The outlet 11b ₂ and the outlet 11b ₂ communicate with each other through the channel 11 ₂ . Similarly, in the flow channel 12, the inflow port 12a ₁ and the open port 12a ₂ are in communication with each other through the flow channel 12 ₁ , and the outflow port 12b ₂ and the open port 12b ₁ are in communication with each other through the flow channel 12 ₂ .

The flow channel 11₁And 11₂Is the flow path body 10
On the upper surface of each opening 11a₂And 11b₁When
Are provided adjacent to each other, and these opening ports 11a₂, 1
1b₁Is open, the flow path 11₁Fluid from (water
Or air) is the flow path 11₂Guided to, these opening 11
a₂, 11b₁When the flow path 11 is closed,₁From flow path 1
1₂Distribution to is blocked. The flow path 12 is also constructed in the same manner.
Open mouth 12a₂, 12b ₁Open and closed between
It The channels 11 and 12 are constructed as described above.
However, the space between these channels is on the upper surface of the channel body 10.
And is completely separated by the partition plate 13.

The open ports 11a ₂ , 1 of the flow path body 10
Upper surface 1b _1, 12a _2, 12b ₁ is opened is formed on the plane, and is formed lower than the surrounding wall 10 ₀ and the partition plate 13, when the upper surface of the wall 10 ₀ is covered with the flexible membrane 20, Room 10 with openings 11a ₂ and 11b _1
The room 10 ₂ provided with ₁ and 12a ₂ and 12b ₁ is
The flow paths 11 and 1 are respectively sealed by the flexible membrane 20.
It is completely separated from the No. 2 by the partition plate 13. Flexible membrane 2
An upper lid 30 having an air hole 31 is disposed on the upper part of 0, and the flexible membrane 20 is sandwiched between the upper lid 30 and the flow path main body 10. At this time, the upper end surface of the partition plate 13 and the flexible film 20 are airtightly joined by an adhesive or the like, and even if the flexible film 20 is displaced in the vertical direction, air does not flow out from the joined portion,
Therefore, the flow paths 11 and 12 are completely partitioned.

On the upper lid 30, for example, an electromagnetic actuator
Is provided with a three-way valve 40 operated by an eta 50
The three-way valve 40 passes through the compressed air supply tube 41.
Compressed air (pilot air) supplied by
It is applied to the flexible film 20 through the hole 31, or
Compressed air applied to the flexible membrane 20 is passed through the exhaust tube 42.
And release it to the outside. 3-way valve 40 is an electromagnetic actuator
Compressed air is allowed to flow through the air holes 31 by being operated by
When applied on the flexible membrane 20, the flexible membrane 20 is pressed down.
Opening 11a₂, 11b₁And the opening 12a₂, 1
2b₁Close the spaces at the same time. Then the electromagnetic actuator
50 activates the 3-way valve 40 to apply the force to the flexible membrane 20.
The pressurized air contained therein is released through the exhaust tube 42.
Then, the opening 11a₂, 11b₁And the opening 12a
₂, 12b₁The spaces communicate. That is, the smell in FIG.
Compressed air is applied to the flexible membrane 20 through the three-way valve 40.
When the flexible film 20 is flexed downward,
Opening ports (11a₂, 11b₁Between), and
(12a₂, 12b₁Communication), and the valve is shut off.
Then, the compressed air applied to the flexible film 20 is released.
And the flexible membrane 20 separates from the opening,
Open mouth (11a₂, 11b₁Between), and (12a ₂, 1
2b₁Communication).

[0012]

As is apparent from the above description, according to the present invention, two fluid passages can be turned on / off simultaneously by a single operation (signal). Although FIG. 1 shows an example in which ON / OFF of two flow paths is controlled at the same time, flow paths having the same configuration are added in parallel, and a single flow path including the added flow paths is also included. By controlling the flexible membrane as described above, it is possible to simultaneously control the multiple channels with a single signal (operation).

Furthermore, according to the present invention, even if the valve (flexible membrane) is closed or opened, the flexible membrane is not damaged. Easy to maintain. Parts replacement is easy. Since only two solenoid valves have been required in the past, only one solenoid valve has been provided, which is advantageous in that the size is reduced and the electric power is saved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view (FIG. 1 (A)) and a cross-sectional view (FIG. 1 (B)) for explaining an example of a 4-port air valve according to the present invention.

FIG. 2 is an overall schematic configuration diagram of a dental treatment unit as an example in which a 4-port air valve according to the present invention is used.

[Explanation of symbols]

10 ... Flow path main body part, 11, 12 ... Flow path, 13 ... Partition plate,
20 ... Flexible membrane, 30 ... Top lid, 40 ... 3-way valve, 50 ... Electromagnetic actuator.

Claims (3)

[Claims] 1. A four-port air valve having two sets of flow passages arranged in parallel and capable of simultaneously turning on and off the two sets of flow passages, wherein the four-port air valve is provided on a side surface thereof. An inlet and an outlet for two sets of flow paths, and an upper surface having an inlet-side opening communicating with the inlet and an outlet-side opening communicating with the outlet corresponding to each of the groups; And, a flow path main body portion having a partition plate for partitioning the open port corresponding to the combination of the flow paths on the upper surface, a flexible film covering the entire upper surface of the flow path main body portion, and the flexible film sandwiched between the flexible film. A lid member that is integrated with the flow path main body and has an air hole for applying compressed air to the flexible film and exhausting the applied compressed air; and the flexible film attached to the lid member through the air hole. A three-way valve for applying compressed air to the air and exhausting the applied air through the air hole; A four-port air valve, comprising: an electromagnetic actuator that switches the valve between a compressed air supply position and an exhaust position where the supplied compressed air is exhausted. 2. The 4-port air valve according to claim 1, wherein the two sets of flow paths are airtightly partitioned by the partition plate and the flexible film. 3. The four-port air valve according to claim 1, wherein one of the two sets of flow paths is a water flow path and the other is an air flow path.