JP2017210989A - Air valve and disassembly method of air valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air valve which enables a lid body to be easily attached to or detached from a valve box without causing troublesome work.SOLUTION: An air valve 1 includes: a valve box 3 having a valve box side hole part 33 and a cutout part 34; a lid body 4 having a lid body flange part 412 and a lid body hole part 413; and a fixing member 5 for fixing the lid body 4 to the valve box 3. The fixing member 5 includes: an engagement part 52 which enters into the valve box side hole part 33 or fits in the cutout part 34 to engage with the valve box side hole part 33; an enlarged diameter part 53 which engages with the lid body hole part 413; and a biasing member 54 arranged between the lid body flange part 412 and the enlarged diameter part 53.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an air valve and a method for disassembling an air valve.

Conventionally, when exhausting air or the like that is connected to a rising pipe provided perpendicularly to a pipe through which a fluid such as waterworks flows and mixed in the fluid flowing through the pipe, or discharging the fluid in the pipe In addition, an air valve that sucks air into a pipe line is known (for example, see Patent Document 1). The air valve disclosed in Patent Document 1 includes a valve box that houses a plurality of valve bodies and a disc-shaped lid. A flange portion is formed on each outer edge of the valve box and the lid, and the flange portion of the lid is installed so as to overlap the flange portion of the valve box. The valve box and the lid have holes in the respective flanges, and bolts are inserted into the holes, and when the nuts are tightened into the inserted bolts, the lid is fixed to the valve box.
By the way, for example, when exchanging the valve body stored in the valve box, the user removes the bolt and nut from the valve box and the lid body, and then removes the lid body from the valve box. And it is necessary to fix a cover to a valve box using a nut.

JP 2014-159820 A

  However, when removing the lid from the valve box or fixing the valve box to the lid, the user usually handles the bolts and nuts in a narrow space, and thus the bolts and nuts may be dropped in the narrow space. As a result, the user had to collect the dropped bolts and nuts from a narrow space or procure new bolts and nuts. That is, there is a problem that the lid cannot be easily attached to and detached from the valve box without causing troublesome work.

  An object of the present invention is to provide an air valve and a method for disassembling the air valve, in which the lid can be easily attached to and detached from the valve box without causing troublesome work.

  In order to achieve the above object, an air valve according to claim 1 is a valve box having a first flange portion, a lid body having a second flange portion facing the first flange portion, and the first valve. A fixing member for fixing the first flange portion and the second flange portion, a first hole portion formed in the first flange portion, and a first hole formed in the second flange portion. An air valve including a second hole communicating with the first portion, wherein the fixing member enters the first hole and enters the first hole without entering the first hole. A first engagement portion that is switched to one of the second postures that engage with the first flange portion, a second engagement portion that engages with the second flange portion, and the second engagement. Between the second flange portion and the second flange portion, the second engaging portion and the second flange portion being spaced apart from each other And having an urging member for urging direction.

  The air valve according to claim 2 is the air valve according to claim 1, wherein the fixing member further includes a shaft portion that connects the first engaging portion and the second engaging portion. When the engaging portion is rotated about the axis of the shaft portion, the first engaging portion is rotated about the axis of the shaft portion.

  The air valve according to claim 3 is the air valve according to claim 1 or 2, wherein the shape of the first hole is other than circular, and the shape of the first engagement portion is the first hole. It corresponds to the shape of the part.

  The air valve according to claim 4 is the air valve according to any one of claims 1 to 3, wherein the shape of the first hole is a long hole, and the shape of the first engagement portion is It corresponds to a long hole which is the shape of the first hole.

  According to a fifth aspect of the present invention, in the air valve according to any one of the first to fourth aspects, the urging member storage portion that stores the urging member is formed in the second hole portion. It is characterized by.

  The air valve according to claim 6 is the air valve according to any one of claims 1 to 5, wherein the air valve is connected to the lid body and is configured to regulate a valve body stored in the valve box. An operation stem guide body for guiding the trunk, a connecting member for connecting the operation stem guide body and the lid body, and a gap providing member for providing a gap between the operation stem guide body and the lid body, The gap providing member is a U-shaped washer, and is disposed between the operation stem guide body and the lid body when providing a gap between the operation stem guide body and the lid body, and the operation stem guide When the gap is not provided between the body and the lid body, the lid body and the connecting member are disposed between the lid body side end portions.

  In order to achieve the above object, a method for disassembling an air valve according to claim 7 includes a valve box having a first flange portion, and a lid having a second flange portion facing the first flange portion. A fixing member for fixing the first flange portion and the second flange portion; a first hole portion formed in the first flange portion; and a second hole portion formed in the second flange portion; A second hole communicating with the first hole, and the fixing member is coupled to the first hole and the second hole, and to the shaft and connected to the shaft. A first engaging portion that can be engaged with the first flange portion and can be disengaged from the first flange portion; and the second flange while being coupled to the shaft portion. A disassembling method of an air valve having a second engaging portion that engages with a portion, wherein the fixing member is connected to the shaft And a release step for releasing the engagement of the first engagement portion and the first flange portion, and the engagement of the first engagement portion and the first flange portion. When the engagement is released, the first engaging portion enters the first hole portion and has a moving step of moving along the axis of the shaft portion.

  According to the present invention, the fixing member which fixes the second flange portion which the first flange portion and the lid body of the valve box have and which is opposed to the first flange portion enters the first hole portion. A first engagement portion that is switched to one of the first posture and the second posture that engages with the first flange portion without entering the first hole portion, and engages with the second flange portion. A second engaging portion; and a biasing member that is interposed between the second engaging portion and the second flange portion and biases the second engaging portion and the second flange portion in a direction of separating the second engaging portion and the second flange portion. Have

  When the first engagement portion is in the second posture, the first engagement portion engages with the first flange portion, and the second engagement portion engages with the second flange portion. The first flange portion and the second flange portion are fixed, and the lid is fixed to the valve box. At this time, the urging member interposed between the second engagement portion and the second flange portion is compressed, and elastic energy is stored in the urging member. When the posture of the first engagement portion is switched from the second posture to the first posture in a state where the elastic energy is stored in the biasing member, the stored elastic energy is released, and the first engagement portion Enters the first hole, so the lid can be easily removed from the valve box. Further, when the removed lid is fixed to the valve box, the first engaging portion passes through the first hole portion and is engaged with the first flange portion from the first posture to the second position. Switch to the posture. Thereby, a cover body can be easily attached to a valve box. In other words, the lid is fixed to the valve box using the above-mentioned fixing members instead of bolts and nuts, so troublesome work such as dropping the bolts and nuts into a narrow space and collecting the dropped bolts and nuts from the narrow space The lid can be easily attached to and detached from the valve box without the occurrence of the above.

  Further, when the second engagement portion rotates around the axis of the shaft portion connecting the first engagement portion and the second engagement portion, the first engagement portion is centered on the axis of the shaft portion. Since it rotates, the attitude | position of a 1st engaging part can be easily switched to either a 1st attitude | position and a 2nd attitude | position.

  Furthermore, since the shape of the first hole and the shape of the first engagement portion are other than circular, the first engagement portion can enter the first hole and the first flange. Part can be engaged. That is, it is possible to avoid the first engaging portion from entering the first hole.

  In addition, since the shape of the first hole portion is a long hole and the shape of the first engagement portion corresponds to the long hole that is the shape of the first hole portion, the first hole portion and the first engagement portion. The joint can be easily formed.

  Further, a biasing member storage portion that stores a biasing member is formed in the second hole portion. When the urging member is stored in the urging member storage portion, one end of the urging member abuts against the bottom of the urging member storage portion, so that when the urging member is compressed, the urging member stores elastic energy. be able to. As a result, when the posture of the first engaging portion is switched from the second posture to the first posture, the stored elastic energy is released, and the first engaging portion enters the first hole. be able to.

  Further, the gap imparting member for imparting a gap between the operation stem guide body and the lid is a U-shaped washer, and when the gap is provided between the operation stem guide body and the lid, the connecting member is opened from the opening of the U-shaped washer. Inserted between the operation trunk guide body and the lid body. When no gap is provided between the operation stem guide body and the lid body, the lid is inserted into the connecting member from the opening of the U-shaped washer, and the lid body side end portion of the connection member connecting the operation stem guide body and the lid body Between the two. That is, since the gap imparting member is a U-shaped washer, the U-shaped washer is attached to the connecting member from the opening, or the connecting member is removed from the opening, so that the gap imparting member can be easily attached to and detached from the connecting member. can do.

1 is an external view of an air valve according to an embodiment of the present invention. It is sectional drawing which follows the AA line in FIG. It is the figure which looked at the valve box in FIG. 2 from the direction of the pipe connection flange part. It is sectional drawing which follows the BB line in FIG. It is a figure used in order to demonstrate the engaging part which comprises the fixing member in FIG. It is an enlarged view of the periphery of the fixing member in FIG. It is a figure used in order to demonstrate the cover body in FIG. FIG. 8A is a diagram used for explaining a method of disassembling the air valve of FIG. 2, FIG. 8A is a diagram used for explaining a method of removing a lid from the valve box, and FIG. It is the figure which looked at the fixing member in Fig.8 (a) from the direction of the pipe connection flange part. FIG. 9A is a diagram used for explaining the behavior of the engaging portion of the fixing member in FIG. 8, and FIG. 9A illustrates the engaging portion immediately before entering the valve box side hole when disassembling the air valve. 9 (b) is a view of the fixing member in FIG. 9 (a) as viewed from the direction of the pipe connecting flange portion. It is a figure used in order to explain the lid removed from the valve box after the engaging part in FIG. 9 enters the valve box side hole.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external view of an air valve 1 according to an embodiment of the present invention.

  The air valve 1 of FIG. 1 includes a valve box 3, a cover 6, and a pipe connection flange portion 7. The valve box 3 stores a valve body 2 described later, and the cover 6 covers the valve box 3. The cover 6 includes a convex portion 6a, and the convex portion 6a has a side wall portion 6b. The side wall part 6b has a recessed part for every fixed space | interval so that a user may hold | maintain the cover 6 easily. The pipe connection flange portion 7 is disposed so as to face the cover 6 with the valve box 3 interposed therebetween. For example, a riser pipe (not shown) for connecting a water supply pipe or the air valve 1 to the pipe connection flange portion 7. Is connected.

  2 is a cross-sectional view taken along line AA in FIG.

  In FIG. 2, an air valve 1 includes a valve body 2, an operation stem 42a for moving the valve body 2 downward in the vertical direction (direction of arrow L in the figure), a valve box 3 for storing the valve body 2, and a valve box 3 And a cover 4 that covers the valve box 3 and a fixing member 5 for fixing the cover 4 to the valve box 3. The valve box 3 includes a guide 2c that regulates the valve body 2 in the vertical direction, and a plurality of mounting tables 2d on which the guide 2c is mounted. A plurality of notches are formed on the upper side with respect to the vertical direction of the guide 2c. The lid body 4 includes a lid body 41 and an operation trunk guide body 42, and the operation trunk 42 a is stored in the operation trunk guide body 42.

  The valve body 2 includes a floating valve body 2a that opens and closes the large air hole 10 and a float valve body 2b that opens and closes the small air hole 11. The floating valve body 2a stores the float valve body 2b, and the floating valve body 2a and the float valve The body 2b is connected at one point. The idle valve body 2a and the float valve body 2b move in the vertical direction along the guide 2c. Specifically, when water flows into the valve box 3 from the pipe connection flange portion 7 side, the floating valve body 2a that abuts the bottom surface of the valve box 3 before the water flows and is not restricted by the operation stem 42a. The float valve body 2b moves upward in the vertical direction. Thereafter, most of the air inside the valve box 3 is released from the large air hole 10, and the floating valve body 2a comes into contact with the O-ring 12 to generate large air. The hole 10 is closed, and the float valve body 2 b closes the small air hole 11. Even when the idle valve body 2 a closes the large air hole 10, the float valve body 2 b opens and closes the small air hole 11. Therefore, the air remaining inside the valve box 3 is released when the float valve body 2 b releases the small air hole 11. Further, when the floating valve body 2a and the float valve body 2b are pressed down by the operation stem 42a, the floating valve body 2a and the float valve body 2b move downward in the vertical direction, so that air flows from the large air hole 10 to the valve box 3. Flows into the interior.

  The valve box 3 includes a substantially cylindrical cylindrical portion 31 having an axis in the vertical direction, and four valve box flange portions 32 (first flange portions) on the outer edge of the cylindrical portion 31 on the lid 4 side. The valve box flange portions 32 are formed in a plate shape and are arranged at equal intervals (FIG. 3).

  FIG. 3 is a view of the valve box 3 in FIG. 2 as viewed from the direction of the pipe connection flange portion 7.

  In FIG. 3, the valve box flange 32 has a valve box side hole 33 (first hole) penetrating in the vertical direction and a notch 34 that overlaps a part of the valve box side hole 33. . A portion of the notch 34 that does not overlap with a part of the valve box side hole 33 does not penetrate in the vertical direction. The notch 34 is formed so as to be orthogonal to the valve box side hole 33 when the valve box flange 32 is viewed from the direction of the pipe connection flange 7.

  The valve box side hole 33 is a hole other than a circle, for example, a long hole. The longitudinal direction of the valve box side hole 33 (long hole) is a tangent at a connection point P between the tubular part 31 and the valve box flange part 32. (Hereinafter simply referred to as “tangential direction”). The notch 34 has a substantially rectangular shape having a longitudinal direction when the valve box flange 32 is viewed from the direction of the pipe connection flange 7, and the longitudinal direction of the notch 34 is perpendicular to the tangential direction. It matches. An engaging portion 52 described later is fitted into the notch portion 34.

  Returning to FIG. 2, the lid body 41 of the lid body 4 includes a lid plate portion 411 placed on the tubular portion 31 of the valve box 3, and four lid flange portions 412 ( A second flange portion). The lid flange portions 412 are formed in a plate shape and are arranged at equal intervals (FIG. 4). Further, the lid flange portion 412 is disposed so as to face the valve box flange portion 32. The lid flange portion 412 is formed with a lid hole portion 413 penetrating in the vertical direction, and the lid hole portion 413 is formed in a round hole. The lid hole 413 faces (communicates) with the valve box side hole 33, and the diameter of the upper side (hereinafter referred to as “biasing member storage 414”) in the vertical direction of the lid hole 413 is a lid. An urging member 54 described later is stored in the urging member storage portion 414, which is larger than the diameter on the lower side with respect to the vertical direction of the body hole portion 413. In the present embodiment, it is assumed that an engaging portion 52 described later cannot enter the lid hole portion 413.

  The fixing member 5 includes a shaft portion 51, an engagement portion 52 connected to one end of the shaft portion 51, a diameter expanding portion 53 connected to the other end of the shaft portion 51, and an urging member 54. Among the constituent members of the fixing member 5, the shaft portion 51, the engaging portion 52, and the enlarged diameter portion 53 may be integrally formed, and the engaging portion 52 is formed on the integrally formed shaft portion 51 and the enlarged diameter portion 53. May be fixed by a screw which is a fixing tool 55. That is, since the shaft portion 51, the engaging portion 52, and the enlarged diameter portion 53 are integrated, when the enlarged diameter portion 53 rotates around the axis of the axial portion 51, the shaft is interlocked with the enlarged diameter portion 53. The part 51 and the engaging part 52 rotate around the axis of the shaft part 51.

  The shaft 51 is inserted into the valve box side hole 33 and the lid hole 413 facing the valve box side hole 33. Correspondingly, the shape of the cross section of the shaft portion 51 is smaller than the long hole valve box side hole portion 33 and the round hole of the lid hole 413, and is, for example, circular. Further, the length of the shaft portion 51 is longer than the total length of the valve box side hole portion 33 and the lid hole portion 413 in the vertical direction.

  FIG. 5 is a diagram used for explaining the engaging portion 52 constituting the fixing member 5 in FIG. 2.

  The engagement portion 52 in FIG. 5 has a three-dimensional shape including an upper surface portion 52a, a bottom surface portion 52b, and a side surface portion 52c, and the upper surface portion 52a and the bottom surface portion 52b have an oblong shape corresponding to the valve box side hole portion 33. The shaft portion 51 is fixed to the engaging portion 52 so as to protrude from the center of the upper surface portion 52a. The length in the longitudinal direction of the upper surface portion 52a and the bottom surface portion 52b is shorter than the length in the longitudinal direction of the valve box side hole portion 33 which is a long hole. Moreover, the length of the direction orthogonal to the longitudinal direction of the upper surface part 52a and the bottom face part 52b is shorter than the length of the direction orthogonal to the longitudinal direction of the valve box side hole part 33 which is a long hole. Therefore, when the major axis of the upper surface part 52 a and the major axis of the valve box side hole 33 overlap (first attitude), the engaging part 52 enters the valve box side hole 33.

  On the other hand, when the major axis of the upper surface 52a and the major axis of the valve box side hole 33 do not overlap (second posture), the engaging part 52 is fitted into the notch 34 and the pipe connection of the valve box side hole 33 is made. Engage on the flange 7 side. That is, an attitude in which the major axis of the upper surface part 52a and the major axis of the valve box side hole 33 are superimposed (hereinafter referred to as “entry attitude”) and an attitude in which the major axis of the upper surface part 52a and the major axis of the valve box side hole 33 are not superimposed ( Hereinafter, these are switched to each other, and whether or not the engaging portion 52 enters the valve box side hole 33 is controlled according to each posture.

  In the present embodiment, when the engaging portion 52 is in the approaching posture, the engaging portion 52 enters the valve box side hole 33, but the valve box side hole 33 has a size that prevents the engaging portion 52 from entering. Since it communicates with the body hole 413, a part of the engaging part 52 comes into contact with the lid hole 413, and the engaging part 52 stays inside the valve box side hole 33. Therefore, the fixing member 5 does not come off the air valve 1 and does not fall from the air valve 1.

  Returning to FIG. 2, the enlarged diameter portion 53 is, for example, a regular polygonal column having a regular polygonal surface, and the diameter of the circumscribed circle of the regular polygon is larger than the diameter of the lid hole portion 413 that is a round hole. large. Therefore, the enlarged diameter portion 53 cannot enter the lid hole portion 413. That is, when the lid body 4 is fixed to the valve box 3, the engaging part 52 is engaged with the notch part 34 and engaged on the pipe connecting flange part 7 side of the valve box side hole part 33, and is expanded. The diameter portion 53 is engaged with the lid hole portion 413 on the cover 6 side of the lid flange portion 412, and when the lid body 4 is not fixed to the valve box 3, the engaging portion 52 is connected to the valve box side hole portion 33. While entering the approach, the enlarged diameter portion 53 engages with the lid hole portion 413 on the cover 6 side of the lid flange portion 412.

  FIG. 6 is an enlarged view of the periphery of the fixing member 5 in FIG. It is assumed that the posture of the fixing member 5 in FIG. 6 is a non-entry posture.

  In FIG. 6, the urging member 54 is, for example, a compression coil spring, and surrounds a part of the shaft portion 51 and is disposed between the lid flange portion 412 and the enlarged diameter portion 53. Further, a part of the urging member 54 is stored in the urging member storage 414, one end of the urging member 54 abuts on the bottom 414 a of the urging member storage 414, and the other end of the urging member 54 is expanded. It is in contact with the diameter portion 53. At this time, the urging member 54 is sandwiched and compressed between the enlarged diameter portion 53 and the bottom portion 414a of the urging member storage portion 414. Accordingly, a restoring force that attempts to return to the uncompressed state acts on the enlarged diameter portion 53 from the biasing member 54. As a result, a gap is formed between the enlarged diameter portion 53 and the lid flange portion 412.

  When the enlarged diameter portion 53 moves downward in the vertical direction, the engaging portion 52 moves downward in the vertical direction to move away from the valve box flange portion 32, and the enlarged diameter portion 53 approaches the lid flange portion 412. When the enlarged diameter portion 53 moves downward with respect to the vertical direction and contacts the lid flange portion 412, the urging member 54 is compressed and stored in the urging member storage portion 414. Subsequently, when the enlarged diameter portion 53 is rotated, the posture of the fixing member 5 becomes the approach posture.

  By the way, when the posture of the fixing member 5 is the non-entry posture, the engaging portion 52 is fitted in the notch portion 34, but even if the enlarged diameter portion 53 is simply rotated around the axis of the shaft portion 51. Since the notch part 34 restricts the engaging part 52, the fixing member 5 does not rotate.

  FIG. 7 is a diagram used for explaining the lid body 4 in FIG. 2.

  7 includes a lid main body 41 including a lid plate portion 411, and an operation trunk guide body 42 that covers the lid plate portion 411 and can be separated from the lid main body 41. It has an operation trunk 42a and a guide part 42b. The operation stem 42a has a screw thread, the guide portion 42b has a screw groove corresponding to the screw thread of the operation stem 42a, and the guide portion 42b guides the operation stem 42a in the vertical direction. When the operation stem 42a is guided downward in the vertical direction, the operation stem 42a contacts the floating valve body 2a, and the floating valve body 2a moves downward in the vertical direction.

  The lid body 41 and the operation trunk guide body 42 are connected by four connecting members 43, for example, bolts. Four bolt projecting portions 415 are formed at equal intervals on the cover plate portion 411 of the lid main body 41, and four connection hole portions 42c are formed at equal intervals on the edge of the operation stem guide body 42 ( 4), each bolt projecting portion 415 is disposed so as to face each connecting hole portion 42c. Each connecting member 43 is fixed to the bolt projecting portion 415 through the connecting hole portion 42c.

  When the lid body 41 and the operation trunk guide body 42 are separated (FIG. 2), a gap imparting member 433 for providing a gap between the lid body 41 and the operation trunk guide body 42 is disposed. The gap imparting member 433 is a U-shaped washer. When the gap imparting member 433 is disposed between the lid body 41 and the operation stem guide body 42, the shaft portion of the connecting member 43 from the opening of the U-shaped washer. It is inserted into 43a and fitted to the shaft portion 43a. Since the gap imparting member 433 is disposed between the lid body 41 and the operation stem guide body 42, the operation stem 42a is not restricted from moving upward on the floating valve body 2a in the vertical direction. As a result, the air valve 1 can discharge, for example, air in a fluid flowing in a pipe line connected to the air valve 1 from the large air hole 10 and the small air hole 11.

  When the lid body 41 and the operation trunk guide body 42 are not separated from each other (FIG. 7), the gap imparting member 433 is formed between the lid body 41 and the cap nut 432 included in the coupling member 43 (the lid side end of the coupling member). Arranged between. Specifically, when the gap imparting member 433 is disposed between the lid body 41 and the cap nut 432, the gap imparting member 433 is inserted into the shaft portion 43a of the connecting member 43 from the opening of the U-shaped washer. The shaft portion 43a is fitted. Since the gap imparting member 433 is disposed between the lid body 41 and the cap nut 432, the operation stem 42a is restricted from moving the floating valve body 2a upward in the vertical direction. Thereby, it is avoided that the floating valve body 2a and the float valve body 2b block the large air hole 10 and the small air hole 11. As a result, water flows into the air valve 1 from the water supply pipe connected to the pipe connecting flange portion 7, and the water that flows into the air valve 1 flows between the mounting table 2 d and the lower side and the valve with respect to the vertical direction of the guide 2 c. Between the boxes 3, between the notches formed on the upper side with respect to the vertical direction of the guide 2 c and through the large air holes 10, the air valve 1 flows out from the upper side with respect to the vertical direction. The water flowing out from the upper side with respect to the vertical direction of the air valve 1 is used, for example, for measuring the water pressure of the water, cleaning the inside of the water pipe after the water pipe is installed, and temporary water supply in the event of a disaster. The

  FIG. 8 is a diagram used for explaining a method of disassembling the air valve 1 of FIG. 2, and FIG. 8A is a diagram used for explaining a method of removing the lid 4 from the valve box 3. FIG. 8B is a view of the fixing member 5 in FIG. 8A viewed from the direction of the pipe connection flange portion 7.

  In FIG. 8, first, the enlarged diameter portion 53 is pressed downward in the vertical direction and comes into contact with the lid flange portion 412. As a result, the urging member 54 is elastically deformed so as to contract and accumulates elastic energy, and the engaging portion 52 of the fixing member 5 fitted in the notch 34 moves downward in the vertical direction to engage. The part 52 is detached from the notch part 34. Next, the enlarged diameter portion 53 is rotated around the axis of the shaft portion 51 so that the posture of the fixing member 5 becomes the approach posture (FIG. 9B), and the enlarged diameter portion 53 is pushed downward in the vertical direction. Released from.

  Thereafter, the urging member 54 releases the stored elastic energy, and restores the contracted state to the state before the enlarged diameter portion 53 is pressed (FIG. 9A). At this time, the fixing member 5 moves upward in the vertical direction, and the engaging portion 52 enters the valve box side hole portion 33. The engaging portion 52 that has entered the valve box side hole 33 remains in the valve box side hole 33, and the fixation of the valve box 3 and the lid 4 is released. In the present embodiment, since the engaging portion 52 cannot enter the lid hole portion 413, for example, when the enlarged diameter portion 53 is gripped and moved upward in the vertical direction, the engaging portion 52 is moved to the lid flange portion. The lid 4 is detached from the valve box 3 together with the fixing member 5 (FIG. 10).

  According to the air valve 1 of the present invention, the fixing member 5 for fixing the lid 4 to the valve box 3 enters the valve box side hole 33 or fits into the notch 34 to be on the valve box side. An engagement portion 52 that engages on the pipe connection flange portion 7 side of the hole 33, a diameter-enlarged portion 53 that engages with the lid hole portion 413 on the cover 6 side of the lid flange portion 412, and a lid flange portion 412. And an urging member 54 which is disposed between the enlarged-diameter portions 53 and intends to restore the state before being compressed.

  When the engaging portion 52 is in the non-entry posture, the engaging portion 52 engages with the valve box flange portion 32, and the enlarged diameter portion 53 engages with the lid hole portion 413. The lid flange portion 412 is fixed, and the lid 4 is fixed to the valve box 3. At this time, the urging member 54 interposed between the enlarged diameter portion 53 and the lid flange portion 412 is compressed, and elastic energy is stored in the urging member 54. When the engaging portion 52 is rotated in a state where the elastic energy is stored in the urging member 54 and the posture of the engaging portion 52 is switched from the non-entry posture to the approach posture, the stored elastic energy is released, Since the engaging part 52 enters the valve box side hole 33, the lid 4 can be easily detached from the valve box 3. Further, when the removed lid body 4 is fixed to the valve box 3, the engaging portion 52 passes through the valve box side hole portion 33 and rotates and is fitted into the notch portion 34 to be fitted to the valve box side hole portion. 33 is engaged on the pipe connecting flange portion 7 side. That is, since the lid 4 is fixed to the valve box 3 by using the fixing member 5 instead of the bolt or nut, the bolt or nut is dropped into a narrow space, and the dropped bolt or nut is recovered from the narrow space. The lid 4 can be easily attached to and detached from the valve box 3 without troublesome work.

  Further, since the shaft portion 51, the engaging portion 52, and the enlarged diameter portion 53 are integrated, when the enlarged diameter portion 53 rotates around the axis of the axial portion 51, the shaft is linked to the enlarged diameter portion 53. The part 51 and the engaging part 52 rotate around the axis of the shaft part 51. Therefore, when the diameter-enlarged portion 53 rotates, the approach posture and the non-entry posture, which are the posture of the engaging portion 52, can be switched to each other.

  Further, the shape of the valve box side hole 33 is other than a circle, and the shape of the engaging part 52 corresponds to the shape of the valve box side hole 33. Specifically, the shape of the valve box side hole portion 33 is a long hole, and the shapes of the upper surface portion 52 a and the bottom surface portion 52 b of the engagement portion 52 are long holes that can enter the valve box side hole portion 33. If the shape of the valve box side hole 33 is circular and the shapes of the upper surface part 52a and the bottom surface part 52b of the engagement part 52 are circular that can enter the valve box side hole part 33, Although each posture cannot be switched, the shape of the valve box side hole portion 33 is other than circular, and the shapes of the upper surface portion 52a and the bottom surface portion 52b of the engagement portion 52 correspond to the shape of the valve box side hole portion 33. Each posture of the engaging portion 52 can be switched. That is, it is possible to avoid the engagement portion 52 from entering the valve box side hole 33 without fail. In addition, since the valve box side hole 33 is a long hole and the engaging part 52 has a shape corresponding to the valve box side hole 33, the valve box side hole 33 and the engaging part 52 can be easily formed. Can do.

  The lid hole 413 is formed with an urging member storage 414 for storing the urging member 54. When the urging member 54 is stored in the urging member storage unit 414, one end of the urging member 54 comes into contact with the bottom 414a of the urging member storage unit 414. Therefore, when the urging member 54 is compressed, the urging member 54 is urged. The member 54 can store elastic energy. As a result, when the posture of the engaging portion 52 becomes the approaching posture, the stored elastic energy is released, and the engaging portion 52 can enter the valve box side hole portion 33.

  Further, the air valve 1 includes a gap imparting member 433 that imparts a gap between the lid body 41 and the operation trunk guide body 42. The gap imparting member 433 is a U-shaped washer, and is inserted into the shaft portion 43 a of the connecting member 43 from the opening of the U-shaped washer, and is disposed between the lid body 41 and the operation trunk guide body 42. When no gap is provided between the lid body 41 and the operation trunk guide body 42, the gap imparting member 433 disposed between the lid body 41 and the operation trunk guide body 42 is removed, and the gap The providing member 433 is inserted into the shaft portion 43a from the opening of the U-shaped washer, and is disposed between the lid body 41 and the cap nut 432 included in the connecting member 43. That is, since the gap imparting member 433 is a U-shaped washer, it can be easily attached to and detached from the shaft portion 43a.

  In the present embodiment, it has been described that the notch 34 is formed in the valve box flange 32, but the notch 34 may not be formed. Further, in the present embodiment, it has been described that the engaging portion 52 cannot enter the lid hole portion 413. However, the engaging portion 52 passes through the lid hole portion 413 so that the fixing member 5 can be detached from the lid body 4. Also good. Further, in the present embodiment, the biasing member storage portion 414 is not formed in the lid hole portion 413, and one end of the biasing member 54 that was scheduled to contact the bottom portion 414 a of the biasing member storage portion 414 is the lid body. You may contact | abut to the flange part 412. FIG.

  Moreover, in this Embodiment, it demonstrated that the fixing member 5 moved to the perpendicular direction. By the way, an air valve is usually stored in a valve chamber, and the space between the air valve and the valve chamber may be narrow. In this case, an air valve that requires a horizontal space for removing the lid from the valve box cannot be installed in the valve chamber. Since the air valve 1 of the present embodiment does not require a horizontal space in order to remove the lid from the valve box, the air valve 1 can be installed even when the space between the air valve and the valve chamber is narrow.

  As described above, the present invention has been described using the above-described embodiment, but the present invention is not limited to the above-described embodiment.

DESCRIPTION OF SYMBOLS 1 Air valve 3 Valve box 4 Cover body 5 Fixing member 32 Valve box flange part 33 Valve box side hole part 52 Engagement part 53 Expanding part 54 Energizing member 412 Cover body flange part 413 Cover body hole part

Claims (7)

A valve box having a first flange portion;
A lid body having a second flange portion facing the first flange portion;
A fixing member that fixes the first flange portion and the second flange portion;
A first hole formed in the first flange portion;
An air valve comprising a second hole portion formed in the second flange portion and communicating with the first hole portion;
The fixing member is
1st engagement switched to either the 1st attitude | position which approachs the said 1st hole, and the 2nd attitude | position which engages with the said 1st flange part, without entering the said 1st hole. And
A second engaging portion that engages with the second flange portion;
A biasing member that is interposed between the second engagement portion and the second flange portion and biases the second engagement portion and the second flange portion in a direction away from each other; Features air valve. The fixing member further includes a shaft portion connecting the first engaging portion and the second engaging portion,
The said 1st engaging part rotates centering on the axis line of the said shaft part, if the said 2nd engaging part rotates centering on the axis line of the said shaft part. Air valve.   3. The air valve according to claim 1, wherein the shape of the first hole portion is other than a circle, and the shape of the first engagement portion corresponds to the shape of the first hole portion. .   The shape of the first hole portion is a long hole, and the shape of the first engagement portion corresponds to a long hole that is the shape of the first hole portion. The air valve according to any one of the above.   5. The air valve according to claim 1, wherein a biasing member storage portion that stores the biasing member is formed in the second hole portion. An operation stem guide body that is connected to the lid body and guides an operation stem for regulating a valve body that is stored in the valve box,
A connecting member for connecting the operation stem guide body and the lid body;
A gap imparting member that imparts a gap between the operation stem guide body and the lid,
The gap providing member is a U-shaped washer, and is disposed between the operation stem guide body and the lid body when providing a gap between the operation stem guide body and the lid body, and the operation stem guide 6. The device according to claim 1, wherein when the gap is not provided between the body and the lid body, the lid body and the connecting member are arranged between the lid body side end portions. The air valve described. A valve box having a first flange portion, a lid having a second flange portion facing the first flange portion, and a fixing member for fixing the first flange portion and the second flange portion And a first hole portion formed in the first flange portion, and a second hole portion formed in the second flange portion and communicating with the first hole portion, and the fixing member Is connected to the shaft portion, and engages with the first flange portion and is connected to the first flange portion and the first flange portion. A first engaging part capable of releasing engagement;
A disassembling method of an air valve having a second engagement portion coupled to the shaft portion and engaged with the second flange portion,
A releasing step of rotating the fixing member around the axis of the shaft portion to release the engagement of the first engagement portion and the first flange portion;
When the engagement of the first engagement portion and the first flange portion is released, the first engagement portion enters the first hole and moves along the axis of the shaft portion. A method for disassembling the air valve.

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