JP2020016330A - Flow passage switching valve and assembling method thereof - Google Patents

Abstract

To provide a flow passage switching valve and the assembling method, which can effectively enhance assembly accuracy.SOLUTION: In a ball valve element 20 of a flow passage switching valve 1, a size H in an axis line direction L is formed to be smaller than a size W in a direction orthogonal to the axis line L so that sealing members 31 and 31 become a restoration state in an assembling posture and the sealing members 31 and 31 become a compressed state in a support posture. When assembling the flow passage switching valve 1, seat members 30 and 30 and the sealing members 31 and 31 are stored in a valve chamber 14, and the ball valve element 20 is arranged in assembling posture between the seat members 30 and 30. A rod-like tool is inserted from a second flow passage 12 of the valve element 10 and the tip is fitted into a recess 27a of a tool mounting section 27 of the ball valve element 20. The rod-like tool is rotated and the ball valve element 20 is rotated from the assembling posture to the support posture.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a flow path switching valve, and more particularly, to a flow path switching valve that switches a flow path by rotating a ball-shaped valve element (ball valve element) in a valve chamber, and an assembling method thereof.

  Patent Document 1 discloses an example of a conventional flow path switching valve. The flow path switching valve includes a ball valve body made of an elastic body having an inflow path and an outflow path, a valve chamber in which the ball valve body is rotatably housed, an inlet flow path communicating with the valve chamber, and a plurality of outlets. A valve case having a flow path. The flow path switching valve selectively connects the inlet flow path to any one of the plurality of outlet flow paths by the rotation operation of the ball valve body.

  The passage switching valve disclosed in Patent Document 1 is configured to directly and rotatably support a ball valve body made of an elastic body by a valve case. In addition, a flow path switching valve that rotatably supports a ball valve body by interposing a resin annular seat member between a ball valve body and a valve case is also known. In this flow path switching valve, a ball valve body is rotatably sandwiched between a pair of seat members, and an O-ring as a sealing member made of rubber or the like is sandwiched between each seat member and the valve case in a compressed state. As a result, the seat member is pressed against the ball valve body to ensure the sealing performance.

JP 2010-223418 A

  However, when assembling the above-described flow path switching valve, it is necessary to sandwich the ball valve body between the pair of seat members and press the sealing member into a compressed state into the valve chamber. For example, there is a problem in assembling accuracy such that the seat member is tilted and accommodated in the valve chamber.

  Therefore, an object of the present invention is to provide a flow path switching valve capable of effectively increasing the assembling accuracy and an assembling method thereof.

  In order to achieve the above object, a flow path switching valve according to one embodiment of the present invention includes a valve body provided with a valve chamber and a plurality of flow paths communicating with the valve chamber, and a rotation position stored in the valve chamber. A switching body for switching the connection of the flow passage according to the valve body and a valve body provided inside the valve chamber at intervals from each other, and rotatably support the valve body therebetween. A pair of seat members, a sealing member disposed between the seat member and the valve body, and a rotation drive unit that rotates the valve body around a rotation axis, a flow path switching valve, The valve body has an opening communicating with the valve chamber for inserting the valve body and the pair of seat members and the sealing member at the time of assembly, and the valve body has a size in the rotation axis direction. The valve body is formed to be smaller than the size in the direction orthogonal to the rotation axis, The inner wall surface possible the valve body seen from the outside through the opening or the flow path, wherein the first jig mounting portion for rotating the valve body in the orthogonal direction.

  In the present invention, a second jig mounting portion for rotating the valve body in the orthogonal direction is provided on an inner wall surface of the valve body that is visible from the outside of the valve body through the opening or the flow path. It may be.

  In the present invention, the valve body is in an assembly posture in which the sealing member is in a compressed state when the rotation axis is in a support posture orthogonal to the facing direction of the pair of seat members, and the rotation axis is in the facing direction. It is preferable that the size in the rotation axis direction is smaller than the size in the direction orthogonal to the rotation axis so that the sealing member is sometimes restored.

  In the present invention, it is preferable that the jig mounting portion has a regular hexagonal concave portion or convex portion.

  In the present invention, the valve body is provided with three valve body openings oriented in a direction orthogonal to the rotation axis and connected to each other by the switching flow path, and the three valve body openings are provided around the rotation axis. The diameter of two of the three valve body openings, which are arranged at intervals of 90 degrees and are opposed to each other with the rotation axis interposed therebetween, is smaller than the diameter of the remaining one of the valve body openings. preferable.

  The valve body is provided with two valve body openings oriented in a direction perpendicular to the rotation axis and connected to each other by the switching flow path, and the two valve body openings are provided at 90-degree intervals around the rotation axis. The diameter of one of the two valve body openings is preferably smaller than the diameter of the other valve body opening.

  In order to achieve the above object, a method of assembling a flow path switching valve according to another aspect of the present invention includes a valve body provided with a valve chamber and a plurality of flow paths communicating with the valve chamber; A valve body provided therein with a switching flow path for switching the connection of the flow path according to the rotational position, and housed at an interval in the valve chamber, with the valve body interposed therebetween. It has a pair of seat members rotatably supported, and a sealing member arranged between the seat member and the valve body, wherein the valve body is the valve body and the pair of seat members at the time of assembly. And an opening that communicates with the valve chamber for inserting the sealing member. The pair of seat members is configured such that the rotation axis of the valve body extends from the assembly posture along the facing direction of the pair of seat members. So that the valve body is in a supporting posture orthogonal to the facing direction. Rotatable and rotatably supports the valve element in the support position around the rotation axis, wherein the valve element is in a compressed state when at least one of the sheet member and the sealing member is in the support position. And the direction in the direction of the rotation axis is orthogonal to the rotation axis so that at least one of the sheet member and the sealing member is in a more restored state than in the support position in the assembly posture. On the inner wall surface of the valve body, which is formed smaller than the size of the valve body and is visible from the outside of the valve body through the opening or the flow path in a direction orthogonal to the facing direction when the valve body is in the assembly posture, A first jig mounting portion is provided, which is configured to be fitted with a tip end portion of a rod-shaped jig, and to be rotated from the assembly posture to the support posture with the rotation of the rod-shaped jig. A method for assembling a flow path switching valve, wherein the pair of seat members and the sealing member are housed in the valve chamber, and the valve body is held between the pair of seat members in the assembly posture. Arrange, insert a rod-shaped jig from the opening or the flow path along a direction orthogonal to the facing direction, fit the tip of the rod-shaped jig with the first jig mounting portion, and rotate the rod-shaped jig. Then, the valve body is rotated from the assembly posture to the support posture.

  In the present invention, the pair of seat members rotatably support the valve body around the orthogonal axis along the facing direction in the support posture, and the outside of the valve body when the valve body is in the support posture. The inner wall surface of the valve element that is visible in the opposite direction through the opening or the flow channel is fitted with the tip of a rod-shaped jig, and the valve element is rotated at right angles with the rotation of the rod-shaped jig. A second jig mounting portion configured to be rotated around an axis is provided, and a rod-shaped jig is inserted from the flow path along the facing direction, and a tip end of the second jig is attached to the second jig. The valve body may be rotated around the orthogonal axis by fitting the jig mounting portion and rotating the rod-shaped jig.

  According to the present invention, the valve body is formed such that the size in the rotation axis direction is smaller than the size in the direction orthogonal to the rotation axis, and the inner wall surface of the valve body that is visible from the outside of the valve body through an opening or a flow path. A first jig mounting portion for rotating the valve element in the orthogonal direction is provided. With this configuration, the valve body is sandwiched between the pair of sheet members in the direction of the rotation axis, and the valve body, the pair of sheet members, and the sealing member are accommodated in the valve chamber from the opening of the valve body, and then the first jig is attached. By rotating the valve body in the orthogonal direction using the part, the distance between the pair of seat members can be increased. Therefore, assembling can be performed more accurately than when assembling in a state where the valve element is sandwiched between the pair of sheet members in the direction orthogonal to the rotation axis.

  Further, according to the present invention, at the time of assembling the flow path switching valve, the pair of seat members and the sealing member are housed in the valve chamber, and the valve body is disposed between the pair of seat members in an assembled posture. A rod-shaped jig is inserted from an opening or a flow path of the valve body along a direction orthogonal to the above-described opposing direction, and its tip is fitted to the first jig mounting portion. By rotating the rod-shaped jig, the valve body is rotated from the assembly posture to the support posture. Because of this, the valve body, the pair of sheet members, and the sealing member are housed in the valve chamber with the degree of compression of the sealing member being relatively small, and then the valve body is assembled using the rod-shaped jig. The sheet member and the sealing member can be brought into a compressed state by rotating the sheet member and the sealing member from the support posture. Therefore, assembling can be performed more accurately than when the sealing member is compressed and pushed into the valve chamber.

  In addition, since the first jig mounting portion is provided on the inner wall surface of the valve body, the jig mounting portion does not interfere with the sheet member. Therefore, for example, a jig mounting portion having a convex shape can be employed, and the degree of freedom in the configuration of the jig mounting portion is greater than that provided on the outer surface of the valve body. Furthermore, even if foreign matter accumulates on the concave jig mounting portion, the foreign matter does not contact the sheet member, so that damage to the sheet member due to the foreign matter can be suppressed.

FIG. 2 is a front view of the flow path switching valve according to the first embodiment of the present invention. It is a longitudinal cross-sectional view of the flow path switching valve of FIG. FIG. 3 is a sectional view taken along line AA of FIG. 2. FIG. 2 is a perspective view including a partial cross section of the flow path switching valve of FIG. 1. FIG. 6 is a six-view drawing of a ball valve body included in the flow path switching valve of FIG. 1. FIG. 2 is a diagram illustrating a method of assembling the flow path switching valve in FIG. 1, and is a diagram illustrating a state before a ball valve body, a seat member, and a sealing member are inserted into a valve body. FIG. 2 is a view for explaining an assembling method of the flow path switching valve in FIG. 1, showing a state in which a ball valve body, a seat member, and a sealing member are inserted into a valve body and the ball valve body is in an assembly posture. . FIG. 2 is a view for explaining an assembling method of the flow path switching valve of FIG. 1, and is a view showing a state in which a ball valve body is rotated from an assembly posture to a support posture in a valve chamber. FIG. 4 is a diagram illustrating a method of assembling the flow path switching valve in FIG. 1, and is a diagram illustrating a state before a driving unit is joined to a valve body. It is a front view of a flow-path switching valve concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view of the flow-path switching valve of FIG. FIG. 12 is a cross-sectional view taken along line BB of FIG. 11. FIG. 11 is a perspective view including a partial cross section of the flow path switching valve of FIG. 10. FIG. 11 is a six-view drawing of a ball valve element included in the flow path switching valve of FIG. 10. It is a figure explaining the assembling method of the flow-path switching valve of FIG. 10, and is a figure which shows the state before inserting a ball valve body, a seat member, and a sealing member into a valve main body. FIG. 11 is a view for explaining an assembling method of the flow path switching valve of FIG. 10, showing a state in which a ball valve body, a seat member, and a sealing member are inserted into a valve body and the ball valve body is in an assembly posture. . FIG. 11 is a view for explaining an assembling method of the flow path switching valve of FIG. 10, and is a view showing a state in which a ball valve body is rotated from an assembly posture to a support posture in a valve chamber. FIG. 11 is a diagram for explaining a method of assembling the flow path switching valve in FIG. 10, and is a diagram showing a state in which a ball valve body in a supporting posture is rotated around an orthogonal axis in a valve chamber. It is a figure explaining the assembling method of the flow-path switching valve of FIG. 10, and is a figure which shows the state before joining a drive part to a valve main body. FIG. 4 is a diagram showing a state before a mold piece is inserted into a cavity of a mold for manufacturing a ball valve element. It is a figure which shows the mode after inserting a metal mold | die into the cavity of the metal mold | die for manufacture of a ball valve body.

(1st Embodiment)
Hereinafter, the configuration of the flow path switching valve according to the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front view of the flow path switching valve according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view (longitudinal cross-sectional view) along a rotation axis of the flow path switching valve of FIG. FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a perspective view including a partial cross section of the flow path switching valve of FIG. FIG. 5 is a six-view drawing of a ball valve element included in the flow path switching valve of FIG. In the following description, “up / down / left / right” is used to indicate the relative positional relationship of each member in each drawing, and does not indicate an absolute positional relationship. In each figure, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction. The X axis, the Y axis, and the Z axis are orthogonal to each other.

  As shown in FIGS. 1 to 5, the flow path switching valve 1 of the present embodiment includes a valve body 10, a ball valve body 20, a pair of seat members 30, 30, sealing members 31, 31, A drive unit 40 as a drive unit and a valve shaft 50 are provided.

  The valve body 10 is formed in a substantially cubic box shape using a synthetic resin as a material. A substantially L-shaped first flow path 11 is provided on the left side wall portion 10a of the valve body 10. A straight second flow path 12 is provided in the front wall portion 10 b of the valve body 10. A substantially L-shaped third flow path 13 is provided in the right side wall 10 c of the valve body 10. The opening 11a of the first flow path 11, the opening 12a of the second flow path 12, and the opening 13a of the third flow path 13 are directed in the same direction (front side, near the plane of FIG. 1). The first flow path 11, the second flow path 12, and the third flow path 13 communicate with a valve chamber 14 provided in the valve body 10. Two or four or more flow paths may be provided as flow paths leading to the valve chamber 14. In the present embodiment, the second flow path 12 extends in the Y-axis direction. Further, the valve body 10 has an opening 10 e communicating with the valve chamber 14. The opening 10e is directed upward.

  The sheet members 30, 30 are formed in an annular shape using, for example, a synthetic resin such as polytetrafluoroethylene (PTFE) as a material. The sheet members 30, 30 may be made of an elastic material such as a rubber material. The seat members 30, 30 form a pair, and are accommodated in the valve chamber 14 so as to face each other at an interval in the X-axis direction. The X-axis direction is the facing direction of the sheet members 30 (hereinafter, also referred to as “facing direction X”). The seat members 30, 30 rotatably support the ball valve body 20, which will be described later, in the valve chamber.

  Specifically, when the flow path switching valve 1 is assembled, the seat members 30, 30 are arranged such that the axis L, which is the rotation axis of the ball valve body 20, is opposed from the assembly posture (FIG. 7) along the facing direction X (FIG. 7). The ball valve body 20 is rotatably supported so as to have a supporting posture (FIG. 8) along a Z-axis direction orthogonal to the direction X. Further, when the assembly of the flow path switching valve 1 is completed (that is, in a completed state where the operation as the flow path switching valve is completed), the seat members 30 and 30 move the ball valve body 20 in the supporting posture along the axis L (Z axis). It is supported rotatably around. The configuration of the seat members 30, 30 is arbitrary as long as the seat members 30, 30 rotatably support the ball valve element 20 therebetween, as long as the object of the present invention is not contravened.

  The sealing members 31, 31 are, for example, O-rings made of an elastic material such as a rubber material, and are provided between one seat member 30 and the left side wall 10a of the valve body 10, and between the other seat member 30 and the valve. It is disposed so as to be in a compressed state between the right side wall 10 c of the main body 10 and the main body 10. In the present embodiment, the sealing member 31 is mounted in an annular groove 30a provided in the sheet member 30, and a part thereof projects from the annular groove 30a. The sealing members 31 and 31 seal (seal) the space between the valve body 10 and the ball valve body 20 together with the seat members 30 and 30. Needless to say, a member in which the sheet members 30, 30 and the sealing members 31, 31 are integrally formed may be used.

  The ball valve body 20 is formed in a hollow ball shape (spherical shape) using, for example, a material such as metal or synthetic resin. The ball valve body 20 is rotatably supported by the seat members 30 and 30 and is accommodated in the valve chamber 14. In the rotation position shown in FIG. 3, the ball valve element 20 has a first opening 21 opened to the left, a second opening 22 opened to the front (downward in FIG. 3), and a right opening to the right. And an opened third opening 23. Inside the ball valve body 20, there is provided a substantially T-shaped switching flow path 25 in a plan view that connects the first opening 21, the second opening 22, and the third opening 23 to each other. The ball valve element 20 has, for example, only the first opening 21 and the second opening 22, and is provided with a substantially L-shaped switching flow path 25 in plan view that connects the first opening 21 and the second opening 22 to each other. It may be. Further, in the present embodiment, the ball valve body 20 is used as the valve body, but a columnar valve body may be used.

  The first opening 21, the second opening 22, and the third opening 23 of the ball valve body 20 are three valve body openings oriented in a direction orthogonal to the axis L and connected to each other by the switching flow path 25. The first opening 21, the second opening 22, and the third opening 23 are arranged at 90-degree intervals around the axis L. For example, when the second opening 22 is oriented in the Y-axis direction, the first opening 21 and the third opening 23 face opposite sides in the X-axis direction. In the present embodiment, the first opening 21, the second opening 22, and the third opening 23 are formed in a circular shape (including a substantially circular shape), and have the same diameter.

  The switching channel 25 is configured to switch the connection between the first channel 11, the second channel 12, and the third channel 13 according to the rotational position. Specifically, the switching flow path 25 connects the first flow path 11, the second flow path 12, and the third flow path 13 when the ball valve body 20 is at the rotation position shown in FIG. The switching flow path 25 connects the first flow path 11 and the second flow path 12 when the ball valve element 20 is at a rotation position clockwise rotated by 90 degrees in a plan view from the rotation position shown in FIG. . The switching flow path 25 connects the second flow path 12 and the third flow path 13 when the ball valve body 20 is at a rotation position rotated 90 degrees counterclockwise in plan view from the rotation position shown in FIG. I do.

  A valve shaft insertion hole 24 into which a valve shaft 50 described later is inserted is provided in an upper portion of the ball valve body 20. The valve shaft insertion hole 24 is formed so that when the valve shaft 50 is inserted, the ball valve body 20 rotates around the axis L with the rotation of the valve shaft 50. Specifically, the valve shaft insertion hole 24 is formed in the same shape as the cross-sectional shape (cross-sectional shape) of the prism portion 52 of the valve shaft 50 in a direction orthogonal to the rotation axis. In this embodiment, the valve shaft insertion hole 24 is formed in a regular hexagonal shape.

  When the axis L is in the assembling posture (FIG. 7) along the X-axis direction (the opposing direction X), the sealing members 31, 31 of the ball valve body 20 are in a restored state (no elastic force is applied from outside and elastically deformed). And the sealing member 31 is in a compressed state when the axis L is in a supporting posture (FIG. 8) along the Z-axis direction (a direction orthogonal to the opposing direction X). Is smaller than the size W in the direction orthogonal to the axis L (H <W). As a result, when the ball valve body 20 is in the assembled posture in the valve chamber 14, the sealing members 31, 31 are in a restored state, and the ball valve body 20, the seat members 30, 30, and the sealing members 31, 31 are press-fitted. It can be inserted into the valve chamber 14 without performing. When the ball valve body 20 is in the supporting position in the valve chamber 14, the sealing members 31, 31 are in a compressed state. Therefore, the seat members 30, 30 are pressed against the ball valve body 20, and the ball valve body 20 The space between the valve body 10 and the valve body 10 is sealed. In addition, the ball valve element 20 is configured such that the sealing members 31, 31 are in a compressed state when in the supporting position, and are in a more restored state in the assembling position than when the sealing members 31, 31 are in the supporting position. It is sufficient that the size H in the direction of the axis L is smaller than the size W in the direction orthogonal to the axis.

  A jig mounting portion 27 is provided on an inner wall surface 26 of the ball valve body 20 facing the second opening 22. The jig mounting portion 27 has a substantially regular hexagonal columnar convex shape protruding toward the second opening 22, and a regular hexagonal concave portion 27 a is provided on the distal end surface. In the present embodiment, the concave portion 27a is configured such that the tip of a hexagon wrench as a rod-shaped jig fits. Alternatively, the concave portion 27a may be configured so that the tip of a plus screwdriver or a minus screwdriver as a rod-shaped jig fits. Alternatively, the jig mounting portion 27, which is a convex portion, may be configured so that a socket wrench is fitted. By adjusting the shape of the jig mounting portion 27 to, for example, the shape of a commercially available hexagon wrench or the like, the cost of the rod-shaped jig can be reduced. The jig mounting portion 27 corresponds to a first jig mounting portion.

  When the ball valve element 20 is disposed in the valve chamber 14 in the assembled posture, the second flow path 12, the second opening 22, and the inner wall surface 26 can be arranged in a straight line. In this assembly posture, the jig mounting portion 27 on the inner wall surface 26 is visible from the outside of the valve body 10 through the second flow path 12 and the switching flow path 25 in the Y-axis direction orthogonal to the opposing direction X.

  The drive section 40 has a drive mechanism combining a speed reducer including a motor and a gear 41 (not shown) and a drive section case 42 made of resin for housing the drive mechanism. The drive unit case 42 is formed in a substantially rectangular parallelepiped box shape. The drive unit case 42 has a lower case 43 and an upper case 44. The lower case 43 and the upper case 44 are assembled to each other by a mounting structure (not shown) such as a screwing structure or a snap-fit structure.

  The lower case 43 integrally has a cylindrical bearing portion 45 at the center of the bottom wall 43a. The bearing portion 45 has the valve shaft 50 inserted therein and supports the valve shaft 50 rotatably. The rib 43b provided on the bottom wall 43a of the lower case 43 is combined with the upper end of the valve body 10 (the valve body 110 in a second embodiment described later), and is joined to each other at the welded portion M (in the present embodiment, Ultrasonic welding). Note that the lower case 43 and the valve body 10 may be assembled to each other by a screwing structure or the like.

  The valve stem 50 is formed in a columnar shape extending linearly as a whole, and includes a columnar portion 51 and a prismatic portion 52 coaxially connected to a lower end of the columnar portion 51. The valve shaft 50 is arranged along the Z-axis direction.

  The cylindrical portion 51 is provided at its lower end with an annular stopper 53 projecting radially outward. The stopper portion 53 is formed such that its outer diameter is larger than the outer diameter of the cylindrical portion 51 and the inner diameter of the bearing portion 45.

  At the lower end of the cylindrical portion 51, a groove is provided over the entire circumference at a position above the stopper portion 53, and an O-ring 54 formed in an annular shape by using a rubber material or the like is fitted into this groove. Have been. The column 51 is inserted into the bearing 45 and is rotatably supported by the bearing 45. The outer diameter of the cylindrical portion 51 is slightly smaller than the inner diameter of the bearing portion 45. When the cylindrical portion 51 is inserted into the bearing portion 45, the O-ring 54 seals the gap between the valve shaft 50 and the bearing portion 45. This prevents the fluid in the valve chamber 14 from leaking outside.

  The gear 41 of the drive unit 40 is fixedly mounted on the upper end of the cylindrical portion 51 by press-fitting, and the valve shaft 50 is rotated with the rotation of the gear 41. At the upper end of the cylindrical portion 51, a flat portion that suppresses idle rotation of the press-fitted gear 41 is provided.

  The prism portion 52 is formed in a column shape having a regular hexagonal cross section. The prism portion 52 is inserted into the valve shaft insertion hole 24 of the ball valve body 20. At this time, the rotation axis of the valve shaft 50 coincides with the axis L of the ball valve body 20. The valve shaft insertion hole 24 is formed in the same regular hexagonal shape as the cross-sectional shape of the prism portion 52. Therefore, the valve shaft insertion hole 24 and the prism portion 52 are fitted to each other, and the ball valve body 20 is rotated around the axis L with the rotation of the valve shaft 50. The prism portion 52 is formed such that its outer diameter is smaller than that of the stopper portion 53.

  In addition to the regular hexagonal shape, the prism portion 52 may be, for example, a polygonal column shape such as a triangular column shape or a quadrangular column shape, or a column shape having a D-shaped cross section in which a part of a side surface of a cylinder is flat. In this case, the valve shaft insertion hole 24 is also formed in the same shape as the cross-sectional shape of the prism portion 52.

  In the flow path switching valve 1, the rotation of the motor of the drive unit 40 is output to the valve shaft 50 through the gear 41, and the valve shaft 50 is rotated. With the rotation of the valve shaft 50, the ball valve body 20 is rotated around the axis L along the Z-axis direction, and is positioned at each rotation position. Thereby, connection of the flow path according to the rotational position is realized.

  Next, an example of an assembling method of the flow path switching valve 1 of the present embodiment will be described with reference to FIGS.

  6 to 9 are views for explaining a method of assembling the flow path switching valve of FIG. Specifically, FIG. 6 is an exploded perspective view showing a state before the ball valve body 20, the seat members 30, 30, and the sealing members 31, 31 are inserted into the valve body 10. FIG. 7 shows a state in which the ball valve body 20, the seat members 30, 30 and the sealing members 31, 31 are inserted into the valve body 10, and the ball valve body 20 is in an assembly posture in which the axis L is along the X-axis direction. FIG. FIG. 8 is a diagram showing a state in which the ball valve body 20 is rotated from the assembly posture in which the axis L is along the X-axis direction to the support posture in which the axis L is along the Z-axis direction, in the valve chamber 14. FIG. 9 is an exploded perspective view showing a state before the drive unit is joined to the valve body 10. 7 and 8, (a) is a perspective view including a partial cross-sectional view, and (b) is an enlarged vertical cross-sectional view.

  First, as shown in FIG. 6, the ball valve body 20 is disposed so that the axis L extends along the X-axis direction and the second opening 22 faces the front. The ball valve body 20 is sandwiched between the seat members 30 in the X-axis direction (opposing direction X). Further, the sealing member 31 is mounted in the annular groove 30a of each sheet member 30. Then, the ball valve body 20, the seat members 30, 30, and the sealing members 31, 31, are inserted into the valve chamber 14 through the opening 10e of the valve body 10, as shown in FIG. At this time, since the ball valve element 20 is in the assembling posture in which the axis L is along the facing direction X, the sealing members 31, 31 are in the restored state in the valve chamber 14. Therefore, the ball valve body 20, the seat members 30, 30, and the sealing members 31, 31 can be smoothly accommodated in the valve chamber 14 without elastically deforming the sealing members 31, 31. In addition, the second flow path 12, the second opening 22, and the inner wall surface 26 are linearly arranged along the Y-axis direction, and the Y-axis is passed through the second flow path 12 and the switching flow path 25 from outside the valve body 10. The jig mounting portion 27 is visible in the direction.

  Next, in the state shown in FIG. 7, a hexagon wrench (not shown) as a rod-shaped jig is inserted from the second flow path 12 into the second opening 22 along the Y-axis direction, and the tip thereof is attached to the jig mounting portion. 27 is fitted with the concave portion 27a. Then, by rotating the hexagon wrench in a counterclockwise direction indicated by an arrow in FIG. 7B, the ball valve body 20 is rotated in a direction orthogonal to the axis L (around the Y-axis direction), as shown in FIG. Then, the axis L of the ball valve body 20 is made to coincide with the Z-axis direction, and the support posture is set. Accordingly, the size W of the ball valve body 20 in the direction orthogonal to the direction of the axis L is larger than the size H of the direction of the axis L (H <W). The gap between the members 30, 30 is expanded to bring the sealing members 31, 31 from the restored state to the compressed state. The seat members 30, 30 support the ball valve body 20 in this supporting posture so as to be rotatable around an axis L along the Z-axis direction. In the present specification, to rotate in a direction orthogonal to the axis L means to rotate around a straight line along a direction orthogonal to the axis L as a rotation axis.

  Next, the prism portion 52 of the valve shaft 50 is inserted into the valve shaft insertion hole 24 of the ball valve body 20 held in the valve chamber 14 and supported. The cylindrical portion 51 of the valve shaft 50 is inserted into the bearing portion 45, and the valve body 10 and the lower case 43 of the drive unit case 42 are combined. Ultrasonic waves are applied to the lower case 43, and the lower case 43 is ultrasonically welded to the valve body 10. Then, the drive mechanism is assembled into the lower case 43 by press-fitting the gear 41 into the cylindrical portion 51 of the valve shaft 50, and the drive unit 40 is assembled by covering the upper case 44, whereby the flow path switching valve 1 is completed.

  As described above, according to the flow path switching valve 1 of the present embodiment, when the flow path switching valve 1 is assembled, the seat members 30 and 30 and the sealing members 31 and 31 are accommodated in the valve chamber 14 and the seat member 30 , 30 are arranged in the assembled posture. A rod-shaped jig is inserted from the second flow path 12 of the valve body 10 along the Y-axis direction orthogonal to the opposing direction X, and its tip is fitted to the concave portion 27 a of the jig mounting portion 27. By rotating the rod-shaped jig, the ball valve body 20 is rotated from the assembly posture to the support posture. Because of this, the ball valve body 20, the seat members 30, 30, and the sealing members 31, 31, are housed in the valve chamber 14 with the sealing members 31, 31 in a restored state. By rotating the ball valve body 20 from the assembly posture to the support posture, the sealing members 31, 31 can be changed from the restored state to the compressed state. Therefore, assembling can be performed with higher accuracy than when the sealing members 31, 31 are compressed and pushed into the valve chamber.

  Further, since the jig mounting portion 27 is provided on the inner wall surface 26 of the ball valve body 20, the jig mounting portion 27 does not interfere with the seat members 30, 30. Therefore, the jig mounting portion 27 having a convex shape can be employed, and the degree of freedom of the configuration of the jig mounting portion 27 is greater than that of the configuration provided on the outer surface of the ball valve body 20. Further, even if foreign matter accumulates in the concave portion 27a of the jig mounting portion 27, the foreign matter does not come into contact with the sheet members 30, 30, so that damage to the sheet members 30, 30 due to the foreign matter can be suppressed.

(2nd Embodiment)
Hereinafter, the configuration of the flow path switching valve according to the second embodiment of the present invention will be described with reference to FIGS.

  FIG. 10 is a front view of the flow path switching valve according to the second embodiment of the present invention. FIG. 11 is a cross-sectional view (longitudinal cross-sectional view) along a rotation axis of the flow path switching valve in FIG. FIG. 12 is a sectional view taken along line BB of FIG. FIG. 13 is a perspective view including a partial cross section of the flow path switching valve of FIG. FIG. 14 is a six-view drawing of a ball valve body included in the flow path switching valve of FIG. In the following description, “up / down / left / right” is used to indicate the relative positional relationship between the members in each drawing, and does not indicate an absolute positional relationship. In each figure, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction. The X axis, the Y axis, and the Z axis are orthogonal to each other.

  As shown in FIGS. 10 to 14, the flow path switching valve 2 of the present embodiment includes a valve body 110, a ball valve body 120, a pair of seat members 30, 30, sealing members 31, 31, It has a part 40 and a valve shaft 50. In the following description, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  The valve body 110 is formed in a substantially cubic box shape using a synthetic resin as a material. The left side wall 110a of the valve body 110 is provided with a linear first flow path 111 extending leftward. The bottom wall 110d of the valve body 110 is provided with a linear second flow path 112 extending downward. A third linear flow path 113 extending rightward is provided on the right side wall 110c of the valve body 110. The opening 111a of the first flow path 111 is directed leftward, the opening 112a of the second flow path 112 is directed downward, and the opening 113a of the third flow path 113 is directed rightward. The first flow path 111, the second flow path 112, and the third flow path 113 communicate with a valve chamber 114 provided in the valve body 110. As the flow path leading to the valve chamber 114, two or four or more flow paths may be provided. Further, the valve body 110 has an opening 110 e communicating with the valve chamber 114. The opening 110e is directed upward.

  In the present embodiment, the seat members 30, 30 are paired, and are accommodated in the valve chamber 114 so as to face each other with an interval therebetween in the X-axis direction. When the flow path switching valve 2 is assembled, the seat members 30, 30 move from the assembly posture in which the axis L of the ball valve element 120 is along the opposing direction X (FIG. 16) to the Y axis direction in which the axis L is orthogonal to the opposing direction X. The ball valve body 120 is rotatably supported so as to be in a supporting posture (FIG. 17) along the same. The seat members 30, 30 support the ball valve body 120 in this supporting posture so as to be rotatable around an orthogonal axis K along the opposing direction X. Further, the seat members 30, 30 support the ball valve body 120 in a supporting posture in which the axis L is along the Z-axis direction so as to be rotatable around the axis L (Z-axis) when the assembly of the flow path switching valve 2 is completed. The configuration of the seat members 30, 30 is arbitrary as long as it rotatably supports the ball valve body 120 with the ball members 120 interposed therebetween, as long as the object of the present invention is not violated.

  Further, in the present embodiment, the sealing members 31, 31 are provided between the one seat member 30 and the left side wall portion 110a of the valve body 110 and between the other seat member 30 and the right side wall portion 110c of the valve body. Are arranged so as to be in a compressed state. The sealing member 31 is mounted in an annular groove 30a provided in the sheet member 30, and a part thereof protrudes from the annular groove 30a. The sealing members 31, 31 seal (seal) between the valve body 110 and the ball valve body 120 together with the seat members 30, 30.

  The ball valve body 120 is formed in a hollow ball shape (spherical shape) using, for example, a material such as metal or synthetic resin. The ball valve body 120 is rotatably supported by the seat members 30 and 30 and is accommodated in the valve chamber 114. In the rotation position shown in FIG. 12, the ball valve body 120 has a first opening 121 opened downward (in the depth direction of the paper of FIG. 12) and a second opening 121 opened frontward (downward in FIG. 12). An opening 122 and a third opening 123 opened toward the right side (the right side in FIG. 12) are provided. Inside the ball valve body 120, a switching flow path 125 connecting the first opening 121, the second opening 122, and the third opening 123 to each other is provided.

  The switching channel 125 is configured to switch the connection between the first channel 111, the second channel 112, and the third channel 113 according to the rotational position. Specifically, the switching flow path 125 connects the first flow path 111 and the third flow path 113 when the ball valve body 120 is at the rotation position shown in FIG. The switching flow path 125 connects the first flow path 111 and the second flow path 112 when the ball valve body 120 is at a rotation position clockwise rotated by 90 degrees in a plan view from the rotation position shown in FIG. .

  A valve shaft insertion hole 124 into which the valve shaft 50 is inserted is provided in an upper portion of the ball valve body 120. The valve shaft insertion hole 124 is formed such that when the valve shaft 50 is inserted, the ball valve body 120 rotates around the axis L with the rotation of the valve shaft 50. Specifically, the valve shaft insertion hole 124 is formed in the same shape as the cross-sectional shape (cross-sectional shape) of the prism portion 52 of the valve shaft 50 in a direction orthogonal to the rotation axis. In this embodiment, the valve shaft insertion hole 124 is formed in a regular hexagonal shape.

  When the ball valve body 120 is in the assembled position shown in FIG. 16, the sealing members 31, 31 are in the restored state, and when in the supporting position shown in FIGS. 17, 18, the sealing members 31, 31 are in the compressed state. Thus, the size H in the direction of the axis L is formed smaller than the size W in the direction orthogonal to the axis L (H <W). As a result, when the ball valve body 120 is in the assembled posture in the valve chamber 114, the sealing members 31, 31 are restored, so that the ball valve body 120, the seat members 30, 30, and the sealing members 31, 31 are press-fitted. It can be inserted into the valve chamber 114 without performing. When the ball valve body 120 is in the supporting position in the valve chamber 114, the sealing members 31, 31 are in a compressed state, so that the seat members 30, 30 are pressed against the ball valve body 120, and the ball valve body 120 The space between the valve body 110 and the valve body 110 is sealed. The ball valve body 120 is configured such that the sealing members 31, 31 are in a compressed state when in the supporting posture, and are in a more restored state in the assembling posture than when the sealing members 31, 31 are in the supporting posture. It is sufficient that the size H in the direction of the axis L is smaller than the size W in the direction orthogonal to the axis.

  A first jig mounting portion 127 is provided on an inner wall surface 126 of the ball valve body 120 facing the second opening 122. The first jig mounting portion 127 has a substantially regular hexagonal columnar convex shape protruding toward the second opening 122, and a regular hexagonal concave portion 127a is provided on a distal end surface. In the present embodiment, the recess 127a is configured such that the tip of a hexagon wrench as a rod-shaped jig fits. Alternatively, the recess 127a may be configured such that the tip of a plus screwdriver or a minus screwdriver as a rod-shaped jig fits. Alternatively, the first jig mounting portion 127, which is a convex portion, may be configured so that a socket wrench is fitted. By adjusting the shape of the first jig mounting portion 127 to the shape of a commercially available hexagon wrench or the like, the cost of the rod-shaped jig can be reduced.

  Further, a second jig mounting portion 129 is provided on the inner wall surface 128 of the ball valve body 120 facing the third opening 123. The second jig mounting portion 129 has a substantially regular hexagonal prism-like convex shape protruding toward the third opening 123, and a regular hexagonal concave portion 129a is provided on the tip end surface. In the present embodiment, the concave portion 129a is configured such that the tip of a hexagon wrench as a rod-shaped jig fits in like the concave portion 129a of the first jig mounting portion 127.

  When the ball valve body 120 is disposed in the valve chamber 114 in the assembled posture, the second opening 122 can be directed upward and the third opening 123 can be directed forward. In this assembling posture, the first jig mounting portion 127 on the inner wall surface 126 is visible from the outside of the valve body 110 in the Z-axis direction orthogonal to the opposing direction X through the opening 110e. Further, when the ball valve body 120 is rotated from this assembly posture so that the axis L becomes a support posture along the Y-axis direction orthogonal to the facing direction X, the third flow path 113, the third opening 123, and the inner wall surface 128 are rotated. Can be arranged in a straight line. In this supporting posture, the second jig mounting portion 129 on the inner wall surface 128 is visible from the outside of the valve main body 110 in the facing direction X (X-axis direction) through the third flow path 113 and the switching flow path 125. .

  Next, an example of an assembling method of the flow path switching valve 2 of the present embodiment will be described with reference to FIGS.

  15 to 19 are diagrams for explaining a method of assembling the flow path switching valve in FIG. Specifically, FIG. 15 is an exploded perspective view showing a state before the ball valve body 120, the seat members 30, 30 and the sealing members 31, 31 are inserted into the valve body 110. FIG. 16 shows a state in which the ball valve body 120, the seat members 30, 30, and the sealing members 31, 31 are inserted into the valve body 110, and the ball valve body 120 is in an assembly posture in which the axis L is along the X-axis direction. FIG. FIG. 17 is a diagram showing a state in which the ball valve body 120 is rotated from the assembled posture to the support posture in which the axis L is along the Y-axis direction in the valve chamber 114. FIG. 18 is a diagram showing a state in which the ball valve body 120 is rotated around the orthogonal axis K in the valve chamber 114, and the axis L is changed from the support posture along the Y-axis direction to the support posture along the Z-axis direction. It is. FIG. 19 is an exploded perspective view showing a state before the drive unit 40 is joined to the valve main body 110. 16A to 18, (a) is a perspective view including a partial cross-section, (b) is an enlarged vertical cross-sectional view along the line BB in FIG. 11, and (c) is a cross-sectional view of FIG. It is an expanded sectional view which follows a C line.

  First, as shown in FIG. 15, the ball valve body 120 is arranged so that the axis L extends along the X-axis direction, the second opening 122 faces upward, and the third opening 123 faces front. The ball valve body 120 is sandwiched between the seat members 30 in the X-axis direction (opposing direction X). Further, the sealing member 31 is mounted in the annular groove 30a of each sheet member 30. Then, the ball valve body 120, the seat members 30, 30, and the sealing members 31, 31 are inserted into the valve chamber 114 through the opening 110e of the valve main body 110 as shown in FIG. At this time, since the ball valve body 120 is in the assembling posture in which the axis L is along the facing direction X, the sealing members 31, 31 are in the restored state in the valve chamber 114. Therefore, the ball valve body 120, the seat members 30, 30 and the sealing members 31, 31 can be smoothly accommodated in the valve chamber 114 without elastically deforming the sealing members 31, 31. Further, the opening 110e, the second opening 122, and the inner wall surface 126 are linearly arranged along the Z-axis direction. From the outside of the valve body 110, the first treatment is performed in the Z-axis direction through the opening 110e and the switching flow path 125. The fixture mounting portion 127 is visible.

  Next, in the state shown in FIG. 16, a hexagon wrench (not shown) as a rod-shaped jig is inserted from the opening 110 e into the second opening 122 along the Z-axis direction, and the tip thereof is attached to the first jig mounting portion. 127 is fitted with the concave portion 127a. Then, by rotating the hexagon wrench in a counterclockwise direction indicated by an arrow in FIG. 16B, the ball valve body 20 is rotated in a direction orthogonal to the axis L (around the Z-axis direction), as shown in FIG. Then, the axis L of the ball valve body 120 is made coincident with the Y-axis direction, and the support posture is set. Accordingly, the size W of the ball valve body 120 in the direction orthogonal to the direction of the axis L is larger than the size H of the direction of the axis L (H <W). The gap between the members 30, 30 is expanded to bring the sealing members 31, 31 from the restored state to the compressed state. Further, in this supporting posture, the third flow path 113, the third opening 123, and the inner wall surface 128 are linearly arranged along the X-axis direction. The second jig mounting portion 129 becomes visible in the facing direction X (X-axis direction) through the flow path 125.

  Next, in the state shown in FIG. 17, a hexagon wrench (not shown) as a rod-shaped jig is inserted from the third flow path 113 into the third opening 123 along the X-axis direction, and the distal end thereof is subjected to the second jig. The recess 129a of the fixture mounting portion 129 is fitted. Then, by rotating the hexagon wrench in a counterclockwise direction indicated by an arrow in FIG. 17C, the ball valve body 120 is rotated around the orthogonal axis K along the opposing direction X, and as shown in FIG. L is made the same as the Z-axis direction to be the supporting posture. The seat members 30, 30 support the ball valve body 120 in this supporting posture so as to be rotatable around an axis L along the Z-axis direction.

  Next, the prism portion 52 of the valve shaft 50 is inserted into the valve shaft insertion hole 124 of the ball valve body 120 in the supporting posture accommodated in the valve chamber 114. The cylindrical portion 51 of the valve shaft 50 is inserted into the bearing 45, and the valve body 110 and the lower case 43 of the drive unit case 42 are combined. Ultrasonic waves are applied to the lower case 43, and the lower case 43 is ultrasonically welded to the valve body 110. Then, the drive mechanism is incorporated into the lower case 43 by press-fitting the gear 41 into the cylindrical portion 51 of the valve shaft 50, and the drive unit 40 is assembled by covering the upper case 44, whereby the flow path switching valve 2 is completed.

  The flow path switching valve 2 of the present embodiment also has the same operation and effect as the flow path switching valve 1 of the first embodiment described above.

  In each of the embodiments described above, the sheet member 30 and the sealing member 31 are configured separately, but a configuration in which the sheet member 30 and the sealing member 31 are integrated may be adopted. For example, a configuration may be adopted in which the sealing member 31 serving as the O-ring is omitted, and the seat member 30 is formed of an elastic material and is disposed so as to be in direct contact with the valve body 10. In this configuration, a portion of the seat member 30 that contacts the valve body 10 serves as a sealing member.

  In the above-described first embodiment, the diameters of the first opening 21, the second opening 22, and the third opening 23 of the ball valve body 20 are the same, but the present invention is not limited to this. For example, the diameters of the first opening 21 and the third opening 23, which are two valve body openings disposed to face each other with the axis L interposed therebetween, are smaller than the diameter of the second opening 22 which is the remaining one valve body opening. May be. The diameter of the first opening 21 and the diameter of the third opening 23 may be the same or different. In this configuration, the inner wall surface 26 of the ball valve body 20 provided with the jig mounting portion 27 is disposed so as to face the second opening 22, and is linear when the ball valve body 20 is housed in the valve chamber 14. Through the second flow path 12 and the second opening 22. The diameter of the second flow path 12 is larger than the diameter of the second opening 22.

  In this manner, when the flow path switching valve 1 is assembled, the rod-shaped positioning jig having the same diameter as the diameter of the second opening 22 is inserted into the second flow path 12 so that the rotational position of the ball valve body 20 can be adjusted. Can be confirmed and positioned. That is, when the rotational position of the ball valve element 20 is correct during assembly, the second opening 22 of the ball valve element 20 faces the second flow path 12. Therefore, the positioning jig can be inserted all the way, and the ball jig 20 can be fixed at a correct rotation position by the positioning jig. On the other hand, when the rotational position of the ball valve body 20 is not correct at the time of assembly, the second opening 22 of the ball valve body 20 does not face the second flow path 12. Therefore, the positioning jig cannot be inserted all the way. In particular, when the first opening 21 or the third opening 23 of the ball valve body 20 faces the second flow path 12, it is difficult to distinguish the second valve 22 from the second opening 22 even if the second flow path 12 is looked into. Therefore, it is possible to recognize that the rotational position of the ball valve body 20 is shifted by inserting the positioning jig, so that the flow path switching valve 1 can be assembled more efficiently. In the ball valve body 20 provided with two valve body openings (for example, only the first opening 21 and the second opening 22), the diameter of one valve body opening (first opening 21) is set to the other valve body opening ( Even if the diameter is smaller than the diameter of the second opening 22), the same operation and effect can be obtained. Note that such a configuration in which the size of the valve body opening is different is also applicable to a ball valve body in which a concave jig mounting portion is provided on the outer surface.

  Further, the synthetic resin ball valve body 20 is manufactured by injecting and filling a molten resin into a cavity C of a mold. 20 and 21 show how the ball valve body 20 is manufactured. FIG. 20 and FIG. 21 are views schematically showing states before and after inserting a mold piece into a cavity of a mold for manufacturing a ball valve element. (A) of each figure is a plan view, and (b) is a front view.

  In the production of the ball valve body 20, the cylindrical second die piece K2 having the same diameter as the diameter of the second opening 22 is moved in one direction (from the bottom to the top in FIG. )) Into the cavity C along the direction from the front to the back). The column-shaped first mold piece K1 having the same diameter as the diameter of the first opening 21 is moved in the other direction orthogonal to the one direction (the direction from left to right in (a) and (b) of each drawing). Along the edge of the first die piece K1, and the tip end face K1a of the first die piece K1 is brought into close contact with the outer peripheral face K2a of the second die piece K2. Similarly, the cylindrical third die piece K3 having the same diameter as the diameter of the third opening 23 is moved in the opposite direction to the other direction (direction from right to left in (a) and (b) of each drawing). And the tip surface K3a of the third mold piece K3 is brought into close contact with the outer peripheral surface K2a of the second mold piece K2. Then, the cavity C is injected and filled with the molten resin.

  The tip surface K1a of the first mold piece K1 is formed in a concave curved shape along the outer peripheral surface K2a of the second mold piece K2. Therefore, a part (indicated by reference numeral E) of the peripheral portion of the distal end surface K1a has a sharply pointed shape. When the diameter of the second opening 22 of the ball valve body 20 is the same as the diameter of the first opening 21, the diameter of the second mold piece K2 and the diameter of the first mold piece K1 are set. Have the same size. As a result, a portion E of the peripheral portion of the front end surface K1a of the first mold piece K1 has a very thin and sharp pointed shape, and the rigidity of the portion E of the first mold piece K1 is reduced, It may not be able to withstand repeated use. The same applies to the third mold piece K3. Then, as described above, by making the diameter of the first opening 21 and the diameter of the third opening 23 smaller than the diameter of the second opening 22, the first die piece K1 and the third die piece K3 are reduced. Part E of the peripheral portion of each of the tip surfaces K1a and K3a can be made thicker. Therefore, the rigidity of a part E of the first mold piece K1 and the third mold piece K3 is increased, and the durability can be effectively improved. The same applies to the production of a ball valve provided with two valve body openings.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these examples. Those skilled in the art may appropriately add, delete, or change the design of the above-described embodiments, or may appropriately combine the features of the embodiments. Included in the range.

(1st Embodiment)
DESCRIPTION OF SYMBOLS 1 ... Flow path switching valve, 10 ... Valve main body, 10a ... Left wall part, 10b ... Front wall part, 10c ... Right wall part, 10e ... Opening, 11 ... 1st flow path, 12 ... 2nd flow path, 13 ... Third flow path, 11a, 12a, 13a opening, 14 valve chamber, 20 ball valve, 21 first opening, 22 second opening, 23 third opening, 24 valve shaft insertion hole, 25 ... Switching channel, 30 ... Sheet member, 30a ... Circular groove, 31 ... Seal member, 40 ... Driver, 41 ... Gear, 42 ... Driver case, 43 ... Lower case, 43a ... Bottom wall, 43b ... Rib, 44 upper case, 45 bearing part, 50 valve stem, 51 cylindrical part, 52 prism part, 53 stopper part, 54 O-ring, M welding part, C cavity, K1 first gold Mold piece, K1a ... Tip face, K2 ... Second mold piece, K2a ... Outer face, K3 ... Third mold piece, K3a ... End surface, a portion of the periphery of the E ... tip surface (second embodiment)
2. Flow passage switching valve, 110: Valve body, 110a: Left wall portion, 110b: Front wall portion, 110c: Right wall portion, 110d: Bottom wall portion, 110e: Opening, 111: First flow passage, 112 ... 2 flow path, 113 ... third flow path, 111a, 112a, 113a ... opening, 114 ... valve chamber, 120 ... ball valve element, 121 ... 1st opening, 122 ... 2nd opening, 123 ... 3rd opening, 124 ... Valve shaft insertion hole, 125 switching channel, 30 seat member, 30a annular groove, 31 sealing member, 40 drive unit, 41 gear, 42 drive unit case, 43 lower case, 43a bottom Wall, 43b rib, 44 upper case, 45 bearing part, 50 valve stem, 51 cylindrical part, 52 prism part, 53 stopper part, 54 O-ring, M welding part

Claims (8)

A valve body provided with a valve chamber and a plurality of flow paths communicating with the valve chamber, and a switching flow path housed in the valve chamber and for switching connection of the flow path according to a rotational position are provided therein. A valve body, a pair of seat members housed in the valve chamber at a distance from each other, and rotatably supporting the valve body therebetween, and a seal disposed between the seat member and the valve body. A flow switching valve having a stop member and a rotation drive unit that rotates the valve element around a rotation axis,
The valve body has an opening communicating with the valve chamber for inserting the valve body and the pair of seat members and the sealing member during assembly,
The valve body is formed such that the size in the rotation axis direction is smaller than the size in the direction orthogonal to the rotation axis,
A first jig mounting portion for rotating the valve body in the orthogonal direction is provided on an inner wall surface of the valve body that is visible from the outside of the valve body through the opening or the flow path. A flow path switching valve.   A second jig mounting portion for rotating the valve body in the orthogonal direction is provided on an inner wall surface of the valve body that is visible from the outside of the valve body through the opening or the flow path, The flow path switching valve according to claim 1.   The valve body is configured such that the sealing member is in a compressed state when the rotation axis is in a supporting position orthogonal to the facing direction of the pair of seat members, and the sealing member is in an assembling posture in which the rotating axis is along the facing direction. 3. The flow path switching valve according to claim 1, wherein the size in the rotation axis direction is smaller than the size in a direction orthogonal to the rotation axis so that the stop member is in a restored state. 4.   The flow path switching valve according to any one of claims 1 to 3, wherein the jig mounting portion has a regular hexagonal concave or convex portion. The valve body is provided with three valve body openings oriented in a direction orthogonal to the rotation axis and connected to each other by the switching flow path,
The three valve body openings are arranged at 90-degree intervals around the rotation axis,
2. The flow path according to claim 1, wherein a diameter of two of the three valve body openings disposed to face each other with the rotation axis interposed therebetween is smaller than a diameter of the remaining one of the valve body openings. Switching valve. The valve body is provided with two valve body openings oriented in a direction perpendicular to the rotation axis and connected to each other through the switching flow path,
The two valve body openings are arranged at 90-degree intervals around the rotation axis,
The flow path switching valve according to claim 1, wherein a diameter of one of the two valve body openings is smaller than a diameter of the other valve body opening. A valve body provided with a valve chamber and a plurality of flow paths communicating with the valve chamber, and a switching flow path housed in the valve chamber and for switching connection of the flow path according to a rotational position are provided therein. A valve body, a pair of seat members housed in the valve chamber at a distance from each other, and rotatably supporting the valve body therebetween, and a seal disposed between the seat member and the valve body. A stop member, and the valve body has an opening communicating with the valve chamber for inserting the valve body, the pair of seat members and the sealing member during assembly, and the pair of seat members is The valve body can be rotated such that the rotation axis of the valve body is in a supporting posture in which the rotation axis is orthogonal to the facing direction from an assembly posture along the facing direction of the pair of seat members, and the supporting posture is Can rotate the valve body around the rotation axis The valve body supports at least one of the seat member and the sealing member in the supporting position in a compressed state and at least one of the seat member and the sealing member in the supporting position in the supporting position. The size in the rotation axis direction is formed smaller than the size in the direction orthogonal to the rotation axis so that the valve body is in a more restored state than in the posture, and when the valve body is in the assembled posture, the outside of the valve main body is formed. The inner wall surface of the valve body that can be visually recognized in a direction orthogonal to the facing direction through the opening or the flow channel is fitted with a tip end of a rod-shaped jig, and the valve is rotated with the rotation of the rod-shaped jig. A method of assembling a flow path switching valve provided with a first jig mounting portion configured to rotate a body from the assembly posture to the support posture,
While accommodating the pair of seat members and the sealing member in the valve chamber, disposing the valve body in the assembly posture between the pair of seat members,
A rod-shaped jig is inserted from the opening or the flow path along a direction orthogonal to the facing direction, and a tip end thereof is fitted with the first jig mounting portion,
A method of assembling a flow path switching valve, wherein the rod-shaped jig is rotated to rotate the valve body from the assembly posture to the support posture. The pair of seat members rotatably supports the valve body around the orthogonal axis along the facing direction in the supporting posture, and the opening or the opening from outside the valve body when the valve body is in the supporting posture. The inner wall surface of the valve body that is visible in the facing direction through the flow channel is fitted with the tip of a rod-shaped jig, and the valve body rotates around the orthogonal axis with the rotation of the rod-shaped jig. A second jig mounting portion configured to be
A rod-shaped jig is inserted from the flow path along the facing direction, and a tip end of the rod-shaped jig is fitted to the second jig mounting portion.
The method for assembling a flow path switching valve according to claim 7, wherein the rod-shaped jig is rotated to rotate the valve body around the orthogonal axis.

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