JP2003049469A - Valve device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To achieve the desired deodorant and insect repellent effects over a long period of time, and to make the entire valve device compact and reduce the manufacturing cost. SOLUTION: A valve chamber 2 is formed in a cylindrical case 1 provided with an inflow port W1 and an outflow port W2 on the upper and lower sides, and a valve is connected to a ceiling wall 1a of the valve chamber 2 in a state communicating with the inflow port W1. A pair of flow-down guide cylinders 3 protruding into the chamber 2 are formed, and a pair of side walls of the valve chamber 2 are capable of abutting from left and right while covering at least the outer periphery of the opening end 3a of the flow-down guide cylinder 3. The valve body 4 is vertically suspended so as to swing open and close in the left-right direction with the upper part as a fulcrum. When both the valve bodies 4 hang down by their own weight, their mating surfaces 4a abut, and the upper inner peripheral edge 4b flows down. The guide cylinder 3 is configured so as to be in a closed posture in sliding contact with or close to the outer peripheral surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents an offensive odor from rising downstream and invasion of harmful insects into a drainage piping system in a large-scale air conditioner such as a commercial refrigerator or a drainage piping system in a home. The present invention relates to a valve device provided for the purpose.

[0002]

2. Description of the Related Art As a valve device such as a drain trap provided in a drainage piping system of this kind, various valve devices have been developed so far, and typical ones are as follows. There are those described in (b).

(A) As shown in FIG. 12, on the inner peripheral surface of a cylindrical case 51 forming a valve chamber 50 that opens vertically,
Also, the annular mounting groove 51 formed near the upper inlet W1
A lid 52 having a large number of drainage slits 52a formed therein and an upper flange 53a of a valve attachment cylinder 53 inserted into the valve chamber 50 side are attached via a packing 54, and On the outer peripheral surface of the lower end of the mounting cylinder 53, a valve body 55 which is vertically swingable about a horizontal axis that opens and closes a lower opening 53b of the valve mounting cylinder 53 is pivotally mounted. The valve body 5 is attached to the boss 55a which is the fulcrum.
5, a weight 56 for returning and urging the valve 5 to a horizontal closed posture in which the valve 5 is closely attached to the lower end of the valve mounting cylinder 53 is mounted in a state of protruding in the direction opposite to the valve body 55 (for example, the actual opening 62). −
No. 35079).

(B) As shown in FIG. 13, on the inner peripheral surface of a cylindrical case 61 in which a valve chamber 60 that opens vertically is formed,
A hollow hollow valve body made of rubber, which has a bag-like shape that can be inserted and arranged on the valve chamber 60 side, and a cutout 62a that can be opened on the bottom, is formed in a mounting step portion 61a formed on the upper inlet W1 side. A flange 63b of 62 is placed, and a screw 63 formed on the inner peripheral surface of the tubular case 61 on the upper inlet W1 side is provided with a lid 63 having a large number of drainage slits 63a. A structure in which the upper flange portion 62b of the valve body 62 is screwed in a fixed state, and the notch 63b of the hollow valve body 62 is tightly closed by an elastic force such that a certain amount of drainage remains. (For example, the actual public 3
5-18759 gazette).

[0005]

In the former valve device of the related art, a horizontal closing posture in which the valve body 55 is in close contact with the lower end of the valve mounting cylinder 53 at the boss portion 55a which is the swinging fulcrum of the valve body 55. Since the weight 56 for urging the valve to be attached to the valve body 55 is mounted so as to project in the direction opposite to the valve body 55,
It is necessary to secure a space for accommodating the weight 56 in a swingable manner between the outer peripheral surface of the valve and the inner peripheral surface of the tubular case 51, and the entire valve device tends to increase in size.

Moreover, since the boss portion 55a, which serves as the swinging fulcrum of the valve body 55, is mounted at the same height as the lower end portion of the valve mounting cylinder 53, at the moment the valve body 55 is opened, one of the drainages is discharged. Of the valve body 55 easily falls onto the boss portion 55a of the valve body 55, and as a result, foreign matter and foreign components in the drainage gradually adhere to the rotating surface of the swinging fulcrum of the valve body 55, resulting in poor opening and closing of the valve body 55. there's a possibility that.

Further, the lower end portion of the valve mounting cylinder 53 is the valve body 5.
When the cylindrical case 51 is mounted on the side away from the valve 5, the gap is formed between the lower end of the valve mounting cylinder 53 and the valve body 55 that is biased to return to the horizontal closed posture. Occasionally, the desired deodorant / insect repellent effect may be reduced or lost.

In the former former valve device, the pressure of the drainage flowing into the rubber hollow valve body 62 elastically expands and deforms outward to push open the notch 63b formed in the bottom portion. However, since the notch 63b of the hollow valve body 62 is configured to close and close with a relatively strong elastic force to the extent that a certain amount of drainage remains, the inflow amount of drainage per unit time is If the number is large, overflow easily occurs.

Moreover, since the elastic force of the rubber hollow valve element 62 deteriorates over time, the notch 63b formed at the bottom of the hollow valve element 62 begins to open gradually, and the desired deodorant / insect repellent effect is reduced or lost. I have something to do.

The present invention has been made in view of the above-mentioned circumstances, and its main problem is to achieve compactness and manufacture while satisfactorily exhibiting the desired deodorizing and insect-controlling effects for a long period of time. It is a point to provide a valve device capable of achieving cost reduction.

[0011]

A valve device according to a first aspect of the present invention is characterized in that a valve chamber is formed in a cylindrical case having a liquid inlet and a liquid outlet provided above and below, respectively. In the ceiling wall portion of the, a downflow guide tube that projects into the valve chamber in a state of communicating with the inflow port is formed, and at least the opening end portion of the downflow guide tube is formed on the side wall portion of the valve chamber or the outer peripheral surface of the downflow guide tube. A pair of valve elements that can be butted from the left and right direction while covering the outer circumference is erected vertically and swingably in the left and right direction with the upper part as a fulcrum, and when both valve elements hang down under their own weight, their mating surfaces Are in contact with each other, and the inner peripheral edge of the upper part is configured to be in a closed posture in which the inner peripheral edge of the upper part is in sliding contact with or close to the outer peripheral surface of the downflow guide cylinder.

According to the above-mentioned characteristic structure, the side wall portion of the tubular case facing the valve chamber or the outer peripheral surface of the downflow guide tube is left and right in a state of covering at least the outer periphery of the opening end portion of the downflow guide tube projecting into the valve chamber. Although only a pair of valve elements that can abut from each other are hung vertically, when these valve elements hang down under their own weight, their mating surfaces abut and the upper inner peripheral edge is the outer peripheral surface of the flow-down guide cylinder. Since it has a closed posture that is in sliding contact with or close to, it is possible to prevent a bad odor or pest that enters the valve chamber through the lower outlet from entering the upper inlet through the downflow guide tube.

Moreover, even if the tubular case is attached with a slight inclination, as shown in FIG. 7, the mating surfaces of both valve bodies are slightly displaced, and the outer circumference of the opening end of the flow-down guide cylinder is almost the same. It is possible to maintain a closed posture in which it is covered in a sealed state.

Further, since a pair of valve bodies covering at least the outer periphery of the opening end portion of the flow-down guide cylinder are vertically oscillated vertically with the upper part as a fulcrum, the liquid flowing out from the flow-down guide cylinder. When it collides with the inner surfaces of both valve bodies in the closed posture, both valve bodies are gradually pushed open from the lower end side, and it is possible to suppress the liquid from falling on the swinging fulcrum portions of both valve bodies.

Therefore, since only a pair of valve bodies are hung vertically in the cylindrical case, there is no deterioration over time, and in addition to the case where the valve bodies are returned and urged by the weight, other than the valve bodies. Due to the synergistic effect of requiring a small space and being able to suppress opening and closing defects due to foreign matter in the drainage and foreign components adhering to the rotating surface of the swing fulcrum of the valve body It is possible to achieve compactness of the entire valve device and reduction of manufacturing cost, while exhibiting good deodorant and insect repellent effects for a long period of time.

According to a second aspect of the valve device of the present invention, the swinging fulcrum portions of the valve bodies are arranged at an intermediate position between the ceiling wall portion of the valve chamber and the lower end of the flow-down guide cylinder. There is a point.

According to the above-mentioned characteristic structure, the liquid flowing out from the flow-down guide cylinder hardly falls on the rocking fulcrums of both valve bodies, and the foreign matter in the drainage is discharged on the rotating surface of the rocking fulcrums of the valve bodies. It is possible to more favorably prevent the opening and closing failure due to the adhesion of different components.

According to a third aspect of the valve device of the present invention, a swing fulcrum pin of each of the valve bodies is provided so as to project at a position corresponding to a swing fulcrum of an outer surface of the both valve bodies. In order to swingably suspend and suspend each swinging fulcrum pin, the swinging fulcrum pin is configured with a latching groove formed at a position corresponding to the swinging fulcrum of the side wall portion of the valve chamber, and the tubular case is It is composed of a split cylindrical case body that is vertically divided into two parts at positions crossing the stop groove, and both split cylindrical case bodies are fixed in a state where the swing fulcrum pins of both valve bodies are locked in the lock grooves. There is a point.

According to the above characteristic construction, the rocking fulcrum pins of both valve bodies are hooked in the hooking grooves of the lower divided cylindrical case body, and then the both divided cylindrical case bodies are fixed. Since it can be attached, the productivity is increased, and also in this respect, the reduction of the manufacturing cost can be promoted.

A characteristic structure of the valve device according to claim 4 of the present invention is that weight adjusting means is provided on the outer side surfaces of both valve bodies.

According to the above characteristic structure, the contact state of the mating surfaces of both valve bodies can be easily and quickly adjusted according to the drainage conditions of the construction site.

According to a fifth aspect of the valve device of the present invention, sliding guide means for urging at least one of the valve bodies toward the other side by its own weight is provided at the swinging fulcrum portions of the both valve bodies. There is a point.

According to the above characteristic structure, at least one of the valve bodies can be moved and urged by its own weight toward the other side by the sliding guide means provided on the swing fulcrums of both valve bodies. The valve body can be swung back to the closed posture quickly and reliably, and the sealing performance of the valve body can be improved.

According to a sixth aspect of the valve device of the present invention, the sliding guide means is provided with a hooking groove formed in a V shape in a state where the position corresponding to the center line of the flow-down guide cylinder is lowest. It is composed of a stop surface, and both valve elements are configured to slide toward each other by their own weight.

According to the above characteristic structure, since the engaging surface of the engaging groove is only formed in a V shape, both valve bodies can be swung quickly and reliably to the closed posture and sealing performance can be obtained. The sliding guide means for increasing the height can be advantageously constructed in terms of structure and manufacturing cost.

According to a seventh aspect of the present invention, there is provided a characteristic feature of a valve device, wherein both valves are locked in a locking groove when the lower split cylindrical case body is fixed to a joint portion of the upper split cylindrical case body. The point is that a regulation portion is formed to regulate the upward movement of the swing fulcrum pin of the body.

According to the above characteristic structure, when the liquid flowing out from the flow-down guide cylinder collides with the inner surfaces of the valve bodies in the closed posture, the impact at that time regulates the vertical movement of both valve bodies. Therefore, both valve bodies can be surely opened and closed and swung smoothly.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS.
Drainage piping system in large-scale air conditioning equipment such as commercial refrigerators,
Alternatively, a valve device connected in the middle of a drainage piping system in a home or the like is shown, and a drainage inlet W1 which is an example of a liquid is shown.
In a cylindrical case 1 made of synthetic resin, which is provided with a vertical direction and a flow outlet W2, a valve chamber 2 which is opened in the vertical direction through the flow inlet W1 and the flow outlet W2 is formed, and a ceiling wall portion facing the valve chamber 2 is formed. A cylindrical flow-down guide cylinder 1A protruding into the valve chamber 2 in a state of communicating with the flow-in port W1 is integrally formed with the la 1a, and left and right side wall portions 1b facing the valve chamber 2 have a flow-down guide cylinder 1A. A pair of valve bodies 4 made of synthetic resin capable of abutting from the left-right direction in a state of covering at least the outer periphery of the opening end portion 3a of 3 is vertically oscillated and opened and closed in the left-right direction with its upper part as a fulcrum. When the two valve bodies 4 hang down under their own weight, the mating surfaces 4a thereof come into contact with each other, and the upper inner peripheral edge 4b is in sliding contact with or close to the outer peripheral surface of the flow-down guide cylinder 3 in a closed posture. .

The swinging fulcrum portions A of the two valve bodies 4 are arranged at an upper and lower intermediate position between the ceiling wall portion 1a facing the valve chamber 2 and the lower end of the downflow guide cylinder 3, and the swinging fulcrum points are also provided. Part A
Is a pair of left and right swing fulcrum pins 5 projectingly provided at positions corresponding to the swing fulcrums on the outer surface of each valve body 4, and the respective swing fulcrum pins 5 are hung so as to be swingable in the left and right directions. , A locking groove 6 formed along the horizontal direction at positions corresponding to the rocking fulcrums of the left and right side wall portions 1b facing the valve chamber 2.

The cylindrical case 1 is composed of divided cylindrical case bodies 1A and 1B which are vertically divided into two parts at positions horizontally crossing the upper edge of the retaining groove 6, and both divided cylindrical cases. On the divided end face, which is the joint between the bodies 1A and 1B,
Fitting connecting portions 1c and 1d that are fitted from above and below are formed, and the fitting connecting portion 1 of both split cylindrical case bodies 1A and 1B is formed.
c and 1d are integrally fixed by a fusion means by ultrasonic waves or a bonding means by an adhesive in a state where the swing fulcrum pin 5 of both valve bodies 4 is locked in the locking groove 6.

A connecting pipe portion 7 having a diameter larger than that of the flow-down guide cylinder 3 and forming an inflow port W1 is integrally formed in the upper divided tubular case body 1A, and the upper connecting pipe portion 7 is also formed. The annular step portion of the ceiling wall portion 1a located in the inner part of the inside is configured as an abutting portion 1e for vertically controlling the insertion length of the upstream side pipe P1 inserted and connected to the upper side connecting pipe portion 7. ing.

A connecting pipe portion 8 having the same diameter as the upper connecting pipe portion 7 and forming the outlet W2 is integrally formed in the lower split cylindrical case body 1B, and the lower connecting pipe portion is formed. At the inner part of the inside 8, there is formed a contact part 1f for restricting the insertion length, which comes into contact with the downstream side pipe P2 inserted and connected to the lower side connecting pipe part 8 from above and below.

On the divided end surface which is a joint portion of the upper divided cylindrical case body 1A, when the lower divided cylindrical case body 1B is fixed, the swinging fulcrum of both valve bodies 4 locked in the locking groove 6 is formed. A restriction portion 1g is formed to restrict the upward movement of the pin 5.

Therefore, when the drainage flowing out from the flow-down guide cylinder 3 collides with the inner surfaces of the valve bodies 4 in the closed posture, it is possible to regulate the vertical movement of both valve bodies 4 due to the impact at that time. Therefore, both valve bodies 4 can be reliably opened and closed and swung smoothly.

When the upper half part of each valve body 4 is formed in a semi-cylindrical shape and the lower half part continuous to the valve body 4 is in the closed posture in which the mating surfaces 4a of both valve bodies 4 are in contact with each other, An inclined wall portion 4d that forms a V-shaped fluid receiving surface 4c when viewed from the direction of the swing axis of the swing fulcrum pin 5 is formed.

The lower end of the outer peripheral surface of the flow-down guide cylinder 3 is
When both valve bodies 4 are in a closed posture in which they are suspended by their own weight, the valve bodies 4
A guide along the movement locus of the upper inner peripheral edge 4b of the valve element 4 with the swing axis of the swing fulcrum pin 5 as a fulcrum so that the upper inner peripheral edge 4b of the lower slide guide is brought into sliding contact with or close to the outer peripheral surface of the downflow guide cylinder 3. It is formed on the curved surface 3b.

The left and right side wall portions 1 facing the valve chamber 2
The rocking fulcrum pin 5 of the pair of valve bodies 4 which can be abutted from the left and right direction is hooked in the hooking groove 6 formed in b while covering at least the outer periphery of the open end 3a of the downflow guide cylinder 3. However, when both valve bodies 4 hang down under their own weight, their mating surfaces 4a come into close contact with each other over their entire area, and the upper inner peripheral edge 4b of the guide curved surface 3b of the outer peripheral surface of the flow-down guide cylinder 3 does. Since the sliding guide is brought into close contact with or in close proximity to the outer circumference of at least the open end of the downflow guide tube 3, a bad odor or harmful insects entering the valve chamber 2 through the lower outflow port W2 is prevented. It is possible to suppress the intrusion into the upper inlet W1 side through the cylinder 3.

Even if the tubular case 1 is mounted in a slightly inclined state, as shown in FIG.
Only a is slightly deviated, and it is possible to maintain the closed posture in which the outer circumference of the opening end of the downflow guide cylinder 3 is covered in a substantially sealed state.

[Second Embodiment] In the first embodiment described above,
A pair of valve bodies 4, which can be abutted from the left and right sides in a state of covering at least the outer periphery of the opening end portion 3a of the flow-down guide cylinder 3, on the left and right side wall portions 1b facing the valve chamber 2 in the left and right directions with the upper portion as a fulcrum. Although it oscillates and opens and closes freely, as shown in FIG. 8, the left and right sides of the outer peripheral surface of the downflow guide tube 3 are covered with at least the outer periphery of the open end 3a of the downflow guide tube 3 from the left and right direction. A pair of buttable valve bodies 4 may be vertically installed so as to swing and open in the left-right direction with the upper part as a fulcrum.

That is, a pair of left and right rocking fulcrum pins 5 are projectingly provided at positions corresponding to the rocking fulcrums on the inner surface of each valve body 4, and are rocked at positions corresponding to the rocking fulcrums on the outer peripheral surface of the downflow guide cylinder 3. The fulcrum pin 5 may be formed by forming a locking groove 6 for hanging and locking the fulcrum pin 5 so that the fulcrum pin can be swung open and closed in the left-right direction. In addition, other configurations are
Since the configuration is the same as that described in the first embodiment, the same components are denoted by the same reference numerals as in the first embodiment, and the description thereof is omitted.

[Third Embodiment] FIG. 9 shows another embodiment in which the sliding fulcrums A of the two valve bodies 4 are provided with sliding guide means B for urging the moving fulcrums A by their own weights toward the other side. The sliding guide means B comprises a hooking surface 6a of a hooking groove 6 formed in a V shape in a state where the position corresponding to the center line of the downflow guide cylinder 3 is the lowest. The two valve bodies 4 are configured to slide toward each other by their own weight.

Since the sliding guide means B provided at the swing fulcrum portion A of both valve bodies 4 can urge both valve bodies 4 toward each other by their own weight, the both valve bodies 4 can be moved. Can be swung back to the closed posture quickly and reliably. Moreover, even when the sliding guide means B is constructed,
Since the hooking surface 6a of the hooking groove 6 is simply formed in a V shape in a state where the position corresponding to the center line of the downflow guide cylinder 3 is the lowest, it can be advantageously carried out in terms of structure and manufacturing cost. . Since the other configurations are the same as the configurations described in the first embodiment, the same components will be denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

[Fourth Embodiment] FIG. 10 shows both valve bodies 4
The guide device of another embodiment in which the weight adjusting means C is provided on the outer side surface of the above is shown. The weight adjusting means C is a pocket forming portion 10 integrally formed on the outer side surface of the valve body 4, and the pocket forming portion. The adjustment weight 11 is detachably housed in the portion 10.

In place of the pocket forming portion 10, an engaging support portion for detachably engaging and holding the adjustment weight 11 is provided with a valve body 4.
May be integrally formed on the outer side surface of. Since the other configurations are the same as the configurations described in the first embodiment, the same components will be denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

[Fifth Embodiment] FIG. 11 shows a cylindrical case 1.
On the upper part of the upper divided tubular case body 1A, a large-diameter tubular receiving portion 1D for detachably mounting and supporting the lid body 15 having a large number of drainage slits 15a is continuously provided, and the valve device This is a configuration of a floor drain trap as an example.
Since the other configurations are the same as the configurations described in the first embodiment, the same components will be denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

[Other Embodiments] (1) In each of the above-described embodiments, the swing fulcrum portions A of the valve bodies 4 are defined by the ceiling wall portion 1a facing the valve chamber 2 and the lower end of the flow-down guide cylinder 3. Although the rocking fulcrum portion A is arranged at an intermediate position between the upper and lower sides, the rocking fulcrum portion A may be arranged at the ceiling wall portion 1a facing the valve chamber 2 or in the vicinity thereof. In short, it is desirable that the swinging fulcrum portions A of both valve bodies 4 be disposed above the lower end of the downflow guide cylinder 3.

(2) In each of the above-described embodiments, the swing fulcrum pin 5 is provided on the valve body 4 so as to project from the left and right side wall portions 1b facing the valve chamber 2.
Alternatively, the engaging groove 6 for engaging the swing fulcrum pin 5 is formed on the outer peripheral surface of the downflow guide tube 3, but conversely, the left and right side wall portions 1b facing the valve chamber 2 or the downflow guide tube 3 are formed. The swing fulcrum pin 5 may be provided so as to project on the outer peripheral surface, and the valve body 4 may be formed with a locking groove 6 for locking the swing fulcrum pin 5.

(3) In the above-described third embodiment, the hooking surface 6a of the hooking groove 6 is formed in a V-shape with the position corresponding to the center line of the downflow guide tube 3 being the lowest, Although the valve bodies 4 are configured to slide toward each other by their own weight,
The sliding guide means B may be one that urges one of the two valve bodies 4 toward the other side by its own weight.

(4) In each of the above-mentioned embodiments, the cylindrical case 1 is composed of the divided cylindrical case bodies 1A and 1B which are vertically divided into two parts at positions horizontally crossing the retaining groove 6. The tubular case 1 may be composed of a split tubular case body that is divided into two parts in the left and right directions while the hooking groove 6 is vertically cut.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional front view showing a first embodiment of a valve device of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a sectional perspective view.

FIG. 5 is an exploded perspective view

FIG. 6 is a front view in vertical section when a pair of valve bodies are opened.

FIG. 7 is a vertical cross-sectional front view showing a closed posture of both valve bodies when the tubular case is tilted.

FIG. 8 is an enlarged vertical cross-sectional front view of the essential parts showing the second embodiment of the present invention.

FIG. 9 is an enlarged vertical cross-sectional side view of an essential part showing a third embodiment of the present invention.

FIG. 10 is an enlarged vertical cross-sectional front view of the essential parts showing the fourth embodiment of the present invention.

FIG. 11 is an exploded perspective view showing a fifth embodiment of the present invention.

FIG. 12 is a vertical sectional front view showing a conventional valve device.

FIG. 13 is a vertical cross-sectional front view showing another conventional valve device.

[Explanation of symbols]

A swing fulcrum B Sliding guide means W1 inlet W2 outlet 1 tubular case 1a Ceiling wall 1b Side wall 2 valve chambers 3 Downstream guide tube 4 valve body 4a Mating surface 4b Upper inner peripheral edge 5 Swing fulcrum pin 6 hook groove 6a Hanging surface

Claims (7)

[Claims] 1. A valve chamber is formed in a cylindrical case having a liquid inlet and a liquid outlet vertically, and a ceiling wall of the valve chamber projects into the valve chamber in a state of communicating with the inlet. In addition to forming the flow-down guide cylinder, a pair of valve bodies that can be abutted from the left and right direction on the side wall portion of the valve chamber or the outer peripheral surface of the flow-down guide cylinder while covering at least the outer periphery of the opening end of the flow-down guide cylinder. When the two valve bodies hang vertically with the upper part as a fulcrum so that they can swing freely and open and close, their mating surfaces abut, and the inner peripheral edge of the upper part slides on the outer peripheral surface of the downflow guide cylinder. A valve device configured to have a closed posture in contact with or close to. 2. The valve device according to claim 1, wherein the swing fulcrums of both valve bodies are arranged at an intermediate position between the ceiling wall of the valve chamber and the lower end of the downflow guide cylinder. 3. A swing fulcrum pin, wherein the swing fulcrum portions of the both valve bodies are provided so as to project at positions corresponding to the swing fulcrums on the outer side surfaces of the both valve bodies,
In order to swingably suspend and suspend each swinging fulcrum pin, the swinging fulcrum pin is configured with a latching groove formed at a position corresponding to the swinging fulcrum of the side wall portion of the valve chamber, and the tubular case is It is composed of a split cylindrical case body that is vertically divided into two parts at positions crossing the stop groove, and both split cylindrical case bodies are fixed in a state where the swing fulcrum pins of both valve bodies are locked in the lock grooves. The valve device according to claim 2. 4. The valve device according to claim 1, 2 or 3, wherein weight adjusting means is provided on the outer side surfaces of both valve bodies. 5. The sliding guide means for urging at least one of the swing fulcrums of the two valve bodies toward the other side by its own weight is provided. 1
The valve device according to the item. 6. The sliding guide means comprises a hooking surface of a hooking groove formed in a V shape in a state where the position corresponding to the center line of the flow-down guide cylinder is lowest, and both valve bodies are provided. The valve device according to claim 5, wherein the valve devices are configured to slide by their own weight toward each other. 7. The upward movement of the rocking fulcrum pins of both valve bodies, which are hooked in the hook grooves when fixed to the lower split tubular case body, at the joint portion of the upper split tubular case body. The valve device according to claim 3, wherein a regulating portion for regulating the valve is formed.