JP2012172397A - Vent valve structure and installation method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vent valve structure enabling a valve body to perform closed movement and opening movement more stably; and an installation method for the same.SOLUTION: A vent valve structure 100 of this invention is connected to a drain pipe 300 which sucks the outside air from a vent hole 113 to release negative pressure in the drain pipe 300 when the drain pipe 300 is put in a negative pressure state, and is provided with a box 120 with an end connection 122 to be connected with the drain pipe 300 and a valve body 111 which is disposed to be movable in a horizontal direction so as to open the vent hole 113 when the drain pipe 300 is put in a negative pressure state while the valve body 111 is energized in a horizontal direction so as to block the vent hole 113.

Description

  The present invention relates to a vent valve structure for drainage which is attached to drain pipes of kitchen sinks, bathtubs, toilets, etc. provided in buildings such as houses and used for sucking outside air when the drain pipe has negative pressure, and the vent The present invention relates to a method of installing a valve structure.

  The drain pipe has a trap portion curved in an S shape or a U shape, and drainage is accumulated in the trap portion. This prevents the bad odor drifting from the downstream of the drainage pipe from leaking into the room because the residual drainage blocks the inside of the trap portion. It also prevents the invasion of pests that creep up from the downstream side of the drain pipe.

  However, when the pressure in the drain pipe decreases and becomes negative due to the downstream state of the drain pipe, the residual drainage in the trap portion may be sucked and flowed downstream. Therefore, by providing a vent valve downstream from the trap part of the drain pipe, when the inside of the drain pipe becomes negative pressure, the outside air is sucked in, the negative pressure state in the drain pipe is eliminated, and the residual drainage is drained. Ventilation method is used to prevent problems. For example, an intake valve structure and a construction method thereof as disclosed in Patent Document 1 are disclosed.

  The intake valve inspection device (1) of Patent Literature 1 (hereinafter, the symbol of Patent Literature 1 is indicated in ()) is a space portion (4) formed on the back side of the wall (3) of the building (2). A housing (6) having an opening (24) to be attached and an intake valve (5) attached to the inside of the housing (6) are provided. The intake valve (5) includes a valve body (16) having a packing (23) formed on the lower surface and a valve seat (22). The packing (23) is valved by gravity due to the weight of the valve body (16). By closing the seat (22), a closed state is formed. When the drain pipe is under negative pressure, the outside air floats up the valve body (16) due to the pressure difference from the outside air pressure, so that the opening (8) formed in the wall (3) and the opening of the housing (6) are formed. Outside air is sucked into the drainage pipe from the space on the surface side of the wall (3) through the portion (24).

  In addition, in the intake valve inspection device (1) (in the state before the wall surface (7) of the building (2) is constructed, it is disposed in the space (4) on the back side of the wall (3) of the building (2). The housing (6) is connected to the drainage pipe, the housing (6) is positioned and fixed to the stud (35) located on the back side of the wall (3), and the intake valve (5) is placed in the housing (6). After installation, the wall surface (7) in which the opening (8) is formed is attached in contact with the housing (6), so that the intake valve inspection device (1) becomes the space (4) on the back side of the wall. Is installed.

JP 2001-818258 A

  However, as in Patent Document 1, when the drainage vent valve is installed on a construction material such as a stud in the space between the walls, that is, the space behind the wall, depending on the installation state of the construction material, obstacles, etc. The housing that holds the body may be tilted and fixed. If the vent valve is installed in such an environment, the movement axis of the valve body is inclined from the vertical direction, and the actual movement direction of the valve body is deviated from the original movement axis. Since it descends in the direction, there is a risk that the valve body will not be able to normally close and open. Moreover, even when the valve body is closed by urging it with a spring or the like, the movement direction of the valve body is not shifted from the originally designed moving axis due to the influence of gravity, and the same problem occurs. There is a fear. Furthermore, when the valve body is held to move in the vertical direction in this way, the influence of gravity on the movement axis of the valve body changes regardless of the direction of movement of the valve body, There was a risk of hindering normal operation of the disc.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a vent valve structure that enables a valve body to move in a closed state and an open state more stably, and a method for installing the vent valve structure. There is to do.

  The vent valve structure according to claim 1 is a vent valve structure that is connected to a drain pipe and sucks outside air from the vent when the inside of the drain pipe becomes negative pressure to eliminate the negative pressure inside the drain pipe. The box is equipped with a connection port for connecting to the drain pipe, and is energized in the horizontal direction so as to close the vent hole, and the vent hole is opened when the pressure inside the drain pipe becomes negative. And a valve body arranged to be movable in the horizontal direction.

  The vent valve structure according to claim 2 is the vent valve structure according to claim 1, wherein the box includes an opening for sucking outside air through a through hole formed in the wall member, and the valve body is a valve It is hold | maintained by a holding body, and a valve holding body is installed in a box from opening.

  The vent valve structure according to claim 3 is the vent valve structure according to claim 2, wherein the valve holder includes a cylindrical portion inserted into the box so that the axis is horizontal, It is hold | maintained so that it may move to the axial center direction of a cylinder part.

  According to a fourth aspect of the present invention, in the vent valve structure according to the second or third aspect, the valve holder includes a contact portion that contacts the wall surface.

  The vent valve structure according to claim 5 is the vent valve structure according to any one of claims 2 to 4, wherein the valve holder and the box are provided with a screwing portion and a screwed portion that are screwed together. It is characterized by.

  A vent valve structure according to a sixth aspect is the vent valve structure according to any one of the first to fifth aspects, wherein the valve body is disposed on the front side of the wall.

  The method according to claim 7 is a method of installing the vent valve structure according to any one of claims 2 to 5 with respect to the drain pipe installed in the wall space, wherein the opening of the box is on the wall front side. The box is fixed in the space behind the wall so as to face the wall, a through-hole is formed in the wall material so as to correspond to the position of the opening, the connection port of the box is connected to the drain pipe, and the valve body is horizontally And a step of detachably attaching the valve holder to the box from the front side of the wall through the through hole and the opening so as to be movable in the direction.

  According to the first aspect of the present invention, in the vent valve structure according to the present invention, the valve body is urged in the horizontal direction, and the valve body is supported so as to be movable in the horizontal direction. In other words, even if the housing that holds the valve body is tilted and fixed depending on the installation state of the construction material, obstacles, etc., if the moving axis of the valve body does not tilt even in the vertical direction, Even if the movement axis of the body is displaced in the horizontal direction, there is no change in the influence of gravity on the movement axis of the valve body, so that normal movement (or operation) of the valve body is not hindered. Therefore, by arranging the moving axis of the valve body to be horizontal, the function of the vent valve can be more stably exhibited over a wider range.

  According to the second aspect of the present invention, by installing the valve holder that supports the valve body in the box from the opening of the box, the valve body can be easily made into a vent valve structure while the moving shaft of the valve body is horizontal. Can be installed. Further, if the valve holder is inserted horizontally from the wall surface, the valve body is installed as it is, and the process and work such as changing the installation direction of the valve body in the wall are not required, and the labor of the mounting work can be reduced.

  According to the third aspect of the present invention, the valve holder has a cylindrical portion, and if the valve holder is attached to the box so that the axis of the cylindrical portion is horizontal, the inclination of the valve body itself is confirmed. Even if not, the moving shaft of the valve body is held horizontally. That is, the moving shaft of the valve body can be easily adjusted to a horizontal state.

  According to the fourth aspect of the present invention, the aeration valve structure can be installed with the abutting portion abutting against the wall surface, and the aeration valve structure can be stably fixed at a predetermined position. That is, the movement axis of the valve body is firmly fixed to the wall material, and the movement axis can be prevented from being inclined from the horizontal direction.

  According to the invention of claim 5, in addition to the effect of the invention of claim 1 or 4, the valve holder is easily and quickly installed in the box by screwing the valve holder to the box. can do. Furthermore, it is possible to prevent the valve holder from being unintentionally detached from the box by the screwed structure.

  According to the sixth aspect of the invention, since the valve body is arranged on the wall surface side, the valve body can be inspected from the wall surface and the maintainability is improved.

  According to the seventh aspect of the present invention, the valve holder can be easily attached to the box so that the moving shaft of the valve body is horizontal through the through hole from the wall surface side. That is, the vent valve structure having the effect of any one of the first to sixth aspects can be easily installed on the drain pipe disposed in the wall space. Further, by connecting the valve holder to the opening in a detachable manner, there is an effect that inspection and replacement of the valve body in the valve holder can be simplified.

The disassembled perspective view of the vent valve structure of one Embodiment of this invention. The valve holding body of FIG. 1 is shown, (a) is a perspective view, (b) is a front view, (c) is a longitudinal cross-sectional view. The box of FIG. 1 is shown, (a) is a perspective view, (b) is a front view, (c) is a longitudinal cross-sectional view. The longitudinal cross-sectional view which shows the state by which the ventilation valve structure of FIG. 1 was arrange | positioned by the wall. It is the elements on larger scale of the vent valve structure of FIG. 4, Comprising: (a) is the obstruction | occlusion state of a valve body, (b) The open state of a valve body. It is a figure explaining the installation method of the vent valve structure of FIG. 1, Comprising: (a) is a longitudinal cross-sectional view when arrange | positioning a wiring box, (b) is a longitudinal cross-sectional view when arrange | positioning a valve holder and a cover member . The longitudinal cross-sectional view which shows the vent valve structure arrange | positioned in the wall in the modification of this invention. (A) And (b) is a longitudinal cross-sectional view which shows the vent valve structure arrange | positioned in the wall in the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the shape of each figure referred in the following description is a conceptual diagram or a schematic diagram for explaining a suitable shape dimension, and a dimension ratio etc. do not necessarily correspond with an actual dimension ratio. That is, the present invention is not limited to the dimensional ratio in the drawings.

  FIG. 1 is an exploded perspective view when a vent valve structure 100 according to an embodiment of the present invention is disposed on a wall material 200 and a drain pipe 300. The vent valve structure 100 includes a valve holder 110 having a valve body 111 and a vent 113, a box 120 having an opening 121 and a connection port 122, and a cover member 130 having a vent 131. The box 120 is connected to the drain pipe 300 disposed in the wall space R in an airtight state, and the wall member 200 is connected so that the opening 121 communicates with the through hole 201 formed in the wall member 200. It is fixed against. Via the through hole 201 of the wall member 200, the valve holder 110 is directly connected from the wall surface space F to the opening 121 of the box 120 in a close contact state. The cover member 130 is attached to the valve holder 110, whereby the vent valve structure 100 of the present embodiment is configured. Hereinafter, each member will be described in detail.

  2A to 2C show the valve holder 110 of the present embodiment. The valve holder 110 is a hollow cylindrical body and has a substantially T shape in side view. The valve holder 110 includes a cylindrical portion 112 that constitutes a cylindrical body, and a vent 113 is formed in the center of the front surface of the valve holder 100, that is, the end surface on the front end side of the cylindrical portion 112. In addition, on the front surface of the valve holder 100, a flange portion (contact portion) 116 extends outward from the periphery of the valve holder 100 with a certain width. The end face on the other end side is open so that air can be vented from the front end side (vent hole 113) to the rear end side.

  The valve body 111 is held at the central portion of the valve holder 110 so that the vent 113 can be opened and closed, and is movable in the axial direction of the cylindrical portion 112. A magnet 114 a is attached to the valve body 111. On the other hand, a magnet 114b is held and arranged in the cylindrical portion 112 by a beam-like magnet holder 114c. The valve body 111 is arranged on one end side (the vent hole 113 side) so as to close the vent hole 113 by a repulsive force between the magnet 114a formed on the valve body 111 and the magnet 114b formed on the cylindrical portion 112 side. Be energized.

  A flat packing 111a is formed around the front side of the valve body 111, and the flat packing 111a and the edge 113a of the vent 113 are in close contact with each other to block the normal ventilation at the position of the valve body 111. . In addition, the guide portion 115 a formed to protrude from the valve body 111 is guided by the guide rail 115 b formed on the inner wall of the cylinder portion 112, so that the valve body 111 extends along the axis of the cylinder portion 112. It is possible to move to the rear end side.

  Two packings (O-rings) 118 are attached around the outer surface of the cylindrical portion 112, and the packing 118 serves to connect the valve holder 110 to the box 120 in an airtight state, as will be described later. Have. Further, a threaded portion 117 that is threaded is formed to protrude from the rear end side of the valve holder 110. The threaded portion 117 corresponds to a threaded portion 123 of the box 120 described later, and enables the valve holder 110 to be detachably attached to the box 120.

  In the valve holder 110 of the present embodiment, the valve body 111 is molded from ABS resin, the cylinder portion 112 and the flange portion 116 are integrally molded from PVC resin, and the flat packing 111a and the packing 118 are made of ethylene propylene rubber (EPDM). And nitrile rubber (NBR), and the magnet 114a is made of a neodymium magnet. However, the present invention is not limited to these raw materials and manufacturing methods, and it goes without saying that any materials and manufacturing methods can be adopted.

  3A to 3C show the box 120 of the present embodiment. The box 120 has an opening 121 through which the tubular portion 112 of the valve holder 110 is inserted at the distal end side, and a circular cross-sectional body having a connection port 122 to which the drain pipe 300 is connected at the proximal end side. The opening 121 and the connection port 122 are in a right angle relationship in the respective opening directions. A cylindrical inner wall 123 is formed in the opening 121 so as to correspond to the size of the cylindrical portion 112 of the valve holder 110. A screwed portion 124 that is screwed with the screwed portion 117 of the valve holder 110 is formed in the box 120 so as to face the opening 121. Further, the box 120 extends from the edge of the opening 121 to the outside, and is fastened to connect the drain pipe 300 to the connection port 122 in an airtight state. Part 126, a second fixing part 127 for fixing to a construction material (not shown) via a screw hole 127a on the back side of wall material 200, and a step part 128 formed in the vicinity of opening 121. Yes.

  In addition, the box 120 of this embodiment is shape | molded with PVC resin, and a fastening part consists of polycarbonate. However, the present invention is not limited to these raw materials and manufacturing methods, and it goes without saying that any materials and manufacturing methods can be adopted.

  FIG. 4 is a longitudinal sectional view of the state in which the vent valve structure 100 of the present embodiment is disposed on the wall material 200. In the vent valve structure 100, the box 120 is connected to the drain pipe 300 by a fastening portion 126. Further, the opening 121 and the through hole 201 communicate with each other so that the opening 121 of the box 120 faces the front side of the wall, and the first fixing portion 125 is fixed in contact with the wall surface 200 on the back of the wall. Then, the cylindrical portion 112 of the valve holder 110 is inserted into the opening 121 of the box 120 from the wall front side through the through hole 201 of the wall member 200, so that the valve holder 110 is directly connected to the opening 121 in a close contact state. ing. At this time, the axial center of the cylinder part 112 faces the horizontal direction (that is, the direction orthogonal to the wall material 200). Further, the cover member 130 is attached to the valve holder 110 so as to cover the valve body 111 and the vent 113 of the valve holder 110. The vent 113 and the vent 131 are located on the wall surface space F side, while the opening 121 is located on the wall space R side. Further, when the valve body 111 is in the closed position, the valve body 111 is also located on the wall surface space F side, like the vent hole 113.

  In this state, the packing 118 formed on the outer surface of the cylindrical portion 112 of the valve holder 110 and the inner wall 123 in the opening 121 of the box 120 are in close contact. The packing 118 seals between the opening 121 and the connection port 122 (or the connection port of the drain pipe), so that the valve holder 110 and the box 120 are connected in close contact. That is, in the vent valve structure 100, in the wall space R, air or the like is sucked from the gap between the edge 121 of the opening 120 of the box 120 and the wall surface 200 on the wall side, and odors in the drain pipe 300 leak out. To prevent.

  Further, the valve holder 110 is screwed to the box 120 by screwing the screwed portion 117 of the valve holder 110 and the screwed portion 124 of the box 120. In this (fastened) state, the flange portion 116 of the valve holder 110 is in contact with the wall surface 200 from the front side of the wall, and the first fixing portion 125 of the box 120 is fixed to the wall surface 200 from the back of the wall on the other hand. The valve holder 110 and the box 120 are installed so as to sandwich the wall material 200 therebetween.

  Fig.5 (a) shows when the valve body 111 is in a closed state, and FIG.5 (b) has shown when the valve body 111 is in an open state.

  As shown in FIG. 5A, when the valve body 111 is in the closed state, the valve body 111 is caused by the repulsive force acting in the arrow direction between the magnet 114a on the valve body 111 side and the magnet 114b on the cylindrical portion 112 side. It is urged in the horizontal direction toward the front side of the wall so as to close the vent 113. The flat packing 111a of the valve body 111 and the edge 113a of the vent 113 are in close contact with each other to form a closed state in which air does not pass through the inside and outside of the valve holder 110.

  As shown in FIG. 5B, when the pressure in the drain pipe 300 becomes negative, a pressure difference is generated between the drain pipe 300 and the external air pressure, and the valve body 111 generated by the pressure difference is directed to the drain pipe 300 side. When the traction force exceeds the urging force (repulsive force) by the magnets (114a, 114b), the guide part 115a of the valve body 111 is guided by the guide rail 115b of the cylindrical part 112, and the valve body 111 is the axis of the cylindrical part 112. Move along the heart to the back of the wall (in the direction of the solid arrow). In this way, the vent 113 (that is, the vent path from the vent 113 to the drain pipe 300) is opened, and the outside air is drained from the wall surface space F so as to eliminate the negative pressure in the drain pipe 300. Inhale in 300 (in the direction of the dashed arrow). When the outside air pressure is sucked into the drain pipe 300 and the external pressure and the pressure in the drain pipe 300 are substantially equal, or when the urging force by magnetism exceeds the traction force due to the pressure difference, the valve body 111 is Similarly, it is moved to the front side of the wall member 200 while being guided by the guide rail 115b, and the closed state is formed again. Thus, the valve body 111 moves so as to open and close along the axial center of the cylindrical portion 112 arranged in the horizontal direction.

  In this embodiment, the edge (or the first fixed portion 125) of the opening 121 of the box 120 is in contact with the wall member 200. However, in the present invention, the box is separated from the wall member. The opening and the through hole do not need to communicate with each other.

  Hereinafter, a method for constructing the vent valve structure 100 of the present embodiment with respect to the drain pipe 300 will be described with reference to FIGS. 6 (a) and 6 (b).

  First, the connection portion 122 of the box 120 is connected to the opening of the drain pipe 300 by the fastening portion 126, the opening 121 faces the wall front side, and the first fixing portion 125 (and the opening edge) is the wall surface 200 from the back side of the wall. The box 120 is arranged with respect to the wall material 200 so as to abut against the wall material 200. The first fixing portion 125 has a long hole 125a (see FIG. 3B), and the box 120 is temporarily fixed to the wall member 200 with a screw or the like through the long hole 125a, and the position of the box is determined. Can be adjusted. When the box is arranged at a predetermined position, the first fixing portion 125 is fixed to the wall material 200. At this time, as shown in FIG. 6A, the magnet M is screwed to the screwed portion 124 of the box 120. In the above-described method, the box 120 is fixed to the wall material 200 constructed in advance by the first fixing unit 125. However, in the present invention, the box 120 is arranged in advance at a predetermined position on the back of the wall. It is also possible to construct the wall material 200 after fixing to the constructed material (not shown) using the second fixing part 127. Further, when the box 120 has to be installed away from the wall member 200, the box 120 is fixed at a predetermined position by fixing the box 120 to the construction material using the second fixing portion 127. be able to.

  6A, the through-hole 201 is formed in the wall material 200, but the position of the through-hole 201 is determined by detecting the magnetism of the magnet M from the wall front side, and the through-hole 201 is drilled by a hole saw. Established. At this time, since the step portion 128 is formed in the vicinity of the opening 121 of the box 120, the inner wall 123 in the opening is slightly separated from the wall surface while the opening diameter spreads outward, and the box 120 may be damaged by the horusoe. It is mitigating.

  Next, after removing the magnet M from the through hole 201 and the opening 121, the cylindrical portion 112 of the valve holder 110 is placed through the through hole 201 and the opening 121 so that the axis of the cylindrical portion 112 is horizontal. Insert it into the box 120 (or so as to be orthogonal to the wall surface 200). Then, the valve holder 110 is rotated and screwed into the box 120 so that the screwed portion 117 is screwed into the screwed portion 124. At this time, the packing 118 and the inner wall 123 are in close contact with each other, and the valve holder 110 is directly connected to the box 120 in an airtight state. Finally, by attaching the cover member 130 to the valve holder 110, the vent valve structure 100 of the present embodiment is constructed with respect to the wall material 200 and the exhaust pipe 300. In order to remove the valve holder 110 from the box 120, the valve holder 110 is rotated in the disengagement direction (opposite to the screwing direction), and the screwed portion 117 and the screwed portion 124 are screwed together. Is released and pulled out from the opening 121 of the box 120.

  In addition, this invention is not limited to the said procedure, It is also possible to install a valve holding body beforehand in a box before installation of a wall material, and to fix a box to the construction material of a wall back side after that.

  Hereinafter, the effect of the vent valve structure 100 of one embodiment of the present invention will be described.

  In general, when the movement axis of the valve body is arranged vertically, the displacement of the movement axis in either direction means that the movement axis is immediately inclined, and the gravity of the movement axis of the valve body The influence changes, and the normal movement (operation) of the valve body may be hindered. On the other hand, in the vent valve structure 100 of the present embodiment, the valve body 111 is biased in the horizontal direction, and the valve body 111 is held so as to be movable in the horizontal direction. If the movement axis is not inclined in the vertical direction, the influence of gravity on the movement axis of the valve body 111 does not change even if the movement axis of the valve body 111 is shifted in the horizontal direction. That is, even if the drain pipe to which the valve body 111 is connected is inclined, as long as the movement axis of the valve body 111 is maintained in the horizontal direction, the normality of the valve body 111 due to the change in the influence of gravity. Movement is not hindered. Therefore, by arranging the moving axis of the valve body to be horizontal, the function of the vent valve can be more stably exhibited. Further, since the valve holder 110 has a cylindrical shape, it is conceivable that the shaft center is not easily inclined from the state in which the valve holder 110 is disposed horizontally.

  Further, in the vent valve structure 100 of the present embodiment, the valve holder 110 is screwed into the box 120, so that the valve holder 110 is easily and quickly fixed in the opening 121 of the box 120 so that they are not detached. can do. Further, in a state where the wall portion 200 is sandwiched between the flange portion 116 of the valve holder 110 and the first fixing portion 125 (or the edge of the opening 121) of the box 120, the screwed portion 117 is connected to the screwed portion 124. By tightening, the flange portion 116 is more strongly engaged with the wall member 200. Therefore, the vent valve structure 100 is firmly fixed to the wall material 200, and the installation position of the vent valve structure 100 can be prevented from shifting. In addition, since the flange portion 116 covers the through hole 201 of the wall material 200, dust and dust in the wall space R are prevented from flowing out of the through hole 201 of the wall material 200 and the wall material 200. The cosmetic effect of preventing the through-hole 201 from being exposed to the outside is also achieved.

  Furthermore, in the vent valve structure 100 of the present embodiment, the valve body 111 can be easily inspected from the wall surface side because the valve body 111 is positioned on the wall surface space F side when closed. Furthermore, since the valve body 111 is held by the valve holder 110, the valve structure can be easily attached to and detached from the box 120 only by attaching and detaching the valve holder 110 to the box 120. That is, when inspecting dirt or the like of the valve body 111, the operator does not need to enter the wall space R, and can check the state of the valve body 111 from the wall surface space F. And when cleaning, replacement | exchange, etc. of the valve body 111 (especially packing 111a) are required, the operator can remove the valve holder 110 quickly, and can perform maintenance work, such as cleaning of the valve body 111. . After this maintenance work, the operator can easily and quickly attach the valve holder 110 to the box 120 from the front side of the wall. Therefore, the ventilation valve structure 100 of this embodiment improves the maintainability compared with the conventional one.

  In the vent valve structure 100 of the present embodiment, the valve holder 110 is easily inserted into the box 120 in an airtight state by inserting the valve holder 110 from the wall surface space F through the through hole 201 and the opening 121. Attached to. For example, in a structure such as Patent Document 1, an operator needs to put his / her hand (from the horizontal direction) in a through-hole of a wall material, and attach and detach a valve body with respect to the vertical direction. If the hole is small, it must be done by groping, which can be a difficult task. On the other hand, as described above, in the vent valve structure 100 of the present embodiment, the operator places the valve holder 110 from the front in the opening 121 of the box 120 facing the wall surface side from the through hole 201 of the wall member 200. The valve holder 110 can be attached simply by inserting and rotating in the horizontal direction. Therefore, the attachment and detachment of the valve holder 110 (valve body 111) becomes extremely easy, and the workability and maintenance of the vent valve structure are improved.

  The present invention is not limited to the above-described embodiment. Modifications 1 and 2 in which the configuration of one embodiment of the present invention is partially changed are shown below. However, Modifications 1 and 2 have the above-described effects in a configuration that is common to one embodiment. Needless to say.

(Modification 1)
In the vent valve structure of the present invention, the valve body is not limited to one that operates by a repulsive force between magnets (like the valve body 111 of the embodiment). For example, like the ventilation valve structure 100A shown in FIG. 7, the valve body 111A may be configured to move by being biased in the closing direction by the spring 114A. That is, any urging means can be used as long as the valve body can be urged in the horizontal direction so as to close the vent.

(Modification 2)
In addition, the vent valve structure of the present invention is not limited to the valve body being held by the valve holder as long as the valve body is held so as to be movable in the horizontal direction. For example, in the ventilation valve structure 100B shown in FIG. 8A, the valve body 111B is configured to be held by the tubular portion of the box 120B. The valve body 111B is urged in the horizontal direction by the repulsive force of the magnets 114a and 114b, and can be guided and moved in the horizontal direction by the guide portion 115a and the guide rail 115b formed in the box 120. That is, the valve body 111B can stably exhibit the function of the vent valve without being affected by gravity. In this modification, the cover member is omitted.

(Modification 3)
Further, as shown in FIG. 8 (b), even when the drain pipe is disposed obliquely, the moving axis of the valve body 111C is set in the horizontal direction by bending the tubular portion near the connection port 122C of the box 120C. Can be maintained. In this case, the tubular portion of the box 120C is molded in advance so as to match the angle of the drain pipe 300C. Alternatively, the vicinity of the connection port 122C of the box 120 may be formed to be flexible and bent so as to match the drain pipe 300C.

  Note that the present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Ventilation valve structure 110 Valve holding body 111 Valve body 111a Flat packing 112 Tube part 113 Vent hole 113a Vent edge part 114a Magnet (biasing means)
114b Magnet (biasing means)
114c Magnet holding part 115a Guide part 115b Guide rail 116 Flange part (contact part)
117 Screwed portion 118 Packing 120 Box 121 Opening 122 Connection port 123 Inner wall 124 Screwed portion 125 First fixing portion 126 Fastening portion 127 Second fixing portion 128 Step 130 Cover member 131 Vent hole 200 Wall 201 Through hole 300 Drain pipe

Claims (7)

A vent valve structure that is connected to the drain pipe and sucks outside air from the vent when the inside of the drain pipe becomes negative pressure to eliminate the negative pressure inside the drain pipe,
A box with a connection port for connection to the drainpipe;
A valve body which is urged in the horizontal direction so as to close the vent hole, and is movably arranged in the horizontal direction so as to open the vent hole when the pressure in the drain pipe becomes negative. A vent valve structure comprising: The box includes an opening for sucking outside air through a through hole formed in the wall material, and the valve body is held by a valve holder,
The vent valve structure according to claim 1, wherein the valve holder is installed in the box from the opening.   The valve holder includes a cylindrical portion inserted into the box so that the axis is horizontal, and the valve body is held so as to move in the axial direction of the cylinder. The vent valve structure according to claim 2.   The vent valve structure according to claim 2 or 3, wherein the valve holder includes a contact portion that contacts the wall surface.   The vent valve structure according to any one of claims 2 to 4, wherein the valve holding body and the box are provided with a screwed portion and a screwed portion that are screwed together.   The vent valve structure according to any one of claims 1 to 5, wherein the valve body is disposed on a wall front side. A method of installing the vent valve structure according to any one of claims 2 to 5 for a drain pipe installed in a wall space,
Fixing the box in the wall space so that the opening of the box faces the front side of the wall, and forming a through hole in the wall material so as to correspond to the position of the opening;
Connecting the connection port of the box to the drain pipe;
A step of detachably attaching the valve holder to the box from the wall surface side through the through-hole and the opening so that the valve body is movable in a horizontal direction;
The method characterized by going through.

Images