JP2019148129A - Joint member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach / detach and clean a joint member from an inspection port to a joint member which is attached to a drainage pipe and has a valve body to prevent backflow of fluid from the downstream side. The purpose is to provide. SOLUTION: A joint member 1 includes a joint main body 10 having an inspection port 14 on a wall surface, a lid portion 20 for closing the inspection port 14, and an adapter 30 connected to the lid portion 20 and arranged in the joint main body 10. , Consists of a check valve 50 attached to the adapter 30. The check valve 50 includes a rod-shaped fixed portion 52 formed in the center and an annular water stop portion 53 formed from the downstream end portion of the fixed portion 52 toward the outside in the circumferential direction. Since the check valve 50 can always arrange the water stop portion 53 at the lower end of the check valve 50 regardless of the direction of the inspection port 14, it is possible to prevent water from remaining on the upstream side of the check valve 50. It will be possible. [Selection diagram] Fig. 1

Description

  The present invention relates to a joint member that is attached to a drain pipe and includes a check valve that prevents a back flow of fluid from the downstream side.

As a joint member connected to a drain pipe, there is known a structure having a check valve inside to prevent a back flow of fluid from the downstream side, as in Patent Document 1. In addition, the joint member described in Patent Document 1 is connected to a drain pipe that discharges drains generated by use of equipment such as a refrigerator-freezer and an air conditioner, and the drain pipe is disposed in a substantially horizontal direction. Is a horizontal pulling tube.
The check valve has a valve body that is pivotally supported in the joint member so as to be rotatable in the drainage flow path. The valve body is in contact with the valve seat when there is no drainage, and the drainage flow path is closed to prevent backflow of odors, fluids such as drainage from the downstream side, or pests. In addition, when a reverse flow of the fluid occurs from the downstream side, stress is applied to the valve body in the direction in which it is pressed against the valve seat, so that the drainage passage is closed. On the other hand, when drainage is discharged from the upstream side, the valve body is rotated by the drainage, and the drainage channel is temporarily opened to discharge the drainage downstream. That is, the check valve closes the drainage channel when there is no drainage or when a backflow of fluid occurs from the downstream side, and opens the drainage channel when drainage occurs from the upstream side. It has a structure that rotates in the direction.
In addition, the joint member has an inspection port and a lid part that closes the inspection port at the upper part, and by removing the lid part, the check valve can be attached and detached and the inside of the joint member can be cleaned. It becomes possible.

JP 2007-224529 A

  Since the joint member uses gravity to open and close the valve body, the vertical direction of the check valve cannot be changed, and depending on the construction environment, the check valve can be attached, removed, or cleaned. May become difficult. For example, when the joint member is connected to a continuous drain pipe from the air conditioner, the joint member is disposed on the back of the ceiling. At this time, the operator removes the inspection lid formed on the ceiling and inspects the joint member from below, but removes the lid disposed on the upper portion of the joint member from below and attaches or removes the check valve. It was difficult to do. In addition, when the joint member is connected to a continuous drainage pipe from the refrigerator / refrigerator, equipment such as a refrigerator / freezer may be disposed above the inspection port, and the lid is also disposed above the joint member. It was difficult to remove the part.

  This invention is invented in view of the said problem, Comprising: It aims at provision of the joint member which can perform attachment / detachment, cleaning, etc. of a non-return valve easily from an inspection port.

The present invention according to claim 1 is a joint member connected to a horizontal pipe,
An inspection port formed on the wall surface;
A lid that closes the inspection port;
It is arranged inside the joint member so that it can be detached from the inspection port, and it has a check valve that prevents backflow of fluid.
The check valve has a water stop portion that closes the drainage flow path, and when the joint member is connected to the horizontal pulling pipe, the check valve can be used even when the direction of the inspection port is an arbitrary direction. This is a joint member characterized in that a water stop portion can be arranged at the lower end of the joint.

According to a second aspect of the present invention, the joint member is
With an adapter that is inserted into the joint member from the inspection port,
The check valve is a fixed portion fixed to the adapter;
2. The joint member according to claim 1, wherein the joint member is an umbrella valve having an annular water stop formed from a downstream end portion of the fixed portion toward the outer side in the circumferential direction.

According to a third aspect of the present invention, the joint member is
With an adapter that is inserted into the joint member from the inspection port,
The joint member according to claim 1, wherein the check valve can be attached to the adapter in a state of being rotated in an arbitrary direction.

  Even if the direction of the inspection port is an arbitrary direction, the joint member of the present invention can be arranged with a water stop at the lower end of the check valve. The function can be performed. Therefore, the inspection port can be directed downward or on the side according to the construction situation, and maintenance and cleanability are improved. Moreover, since the water stop part can be arrange | positioned at the lower end of a non-return valve, it becomes possible to prevent that the water residue arises in the upstream of a non-return valve at the time of completion | finish of drainage.

It is sectional drawing which shows the joint member of this invention. It is an exploded view which shows a coupling member. It is sectional drawing which shows a non-return valve. (A) Sectional drawing which shows operation | movement at the time of the fluid generation | occurrence | production from upstream (b) It is sectional drawing which shows the operation | movement at the time of the fluid backflow from a downstream. It is sectional drawing which shows the case where an inspection port is faced downward. It is sectional drawing which shows the joint member of 2nd embodiment. It is an exploded view which shows a coupling member. (A) Sectional drawing which shows operation | movement at the time of the fluid generation | occurrence | production from upstream (b) It is sectional drawing which shows the operation | movement at the time of the fluid backflow from a downstream. It is sectional drawing which shows the case where an inspection port is faced downward. It is a reference drawing which shows the construction state of a joint member. It is a reference drawing which shows the construction state of a joint member.

  Below, the joint member of this invention is demonstrated, referring drawings. Note that the description given below facilitates understanding of the embodiment, and the present invention is not limited and understood by this.

  Further, the joint member in the present invention can be fixed in a state where the direction of the inspection port 14 is in an arbitrary direction around the central axis C of the joint main body 10, but in order to facilitate understanding of the invention. In the description of the first embodiment shown in FIGS. 1 to 4, the upper, lower, left and right directions will be described with reference to the state in which the inspection port faces upward as shown in FIG. 1.

  As shown in FIG. 1, the joint member 1 according to the present embodiment includes a joint body 10 having an inspection port 14 on a wall surface, a lid 20 that closes the inspection port 14, and a lid 20 that is connected to the joint body 10. It consists of an adapter 30 arranged and a check valve 50 attached to the adapter 30. Further, the joint member 1 is connected to a cylindrical horizontal pulling tube extending substantially in the horizontal direction on the upstream side and the downstream side. In FIG. 1, the horizontal pulling pipe connected to the upstream side and the downstream side is indicated by a two-dot chain line.

As shown in FIGS. 1 and 2, the joint body 10 is a cylindrical casing made of a translucent hard resin, and has a cylindrical shape to which a horizontal pipe is connected at an upstream end and a downstream end thereof. The inlet 11 and the outlet 12 are provided. A storage chamber 13 for storing an adapter 30 and a check valve 50 (described later) is formed inside the joint body 10, and an inspection port 14 is opened in the wall surface of the storage chamber 13.
The inflow port 11 and the outflow port 12 have a cylindrical shape in which the central axes C coincide with each other, and have an inner diameter that is substantially the same as the outer diameter of the horizontal pulling tube connected by bonding.
The inspection port 14 is a circular opening formed in the wall surface of the joint body 10, and a convex portion 15 is formed on the inner periphery thereof toward the inside. The convex portions 15 are projections that engage with a lid portion 20 to be described later, and are formed at four locations at equal intervals. When the lid 20 and the adapter 30 are inserted into the inspection port 14, the packing 40 attached to the adapter 30 extends over the entire inner circumference of the inspection port 14 below the convex portion 15 (on the storage chamber 13 side). They are in contact with each other and are watertightly closed in a state where the lid portion 20 is attached.
The storage chamber 13 is located between the inflow port 11 and the outflow port 12, and as shown in FIGS. 1 and 2, the storage chamber 13 is directly below the inspection port 14 in a state where the inspection port 14 is arranged facing upward. Formed in position. The storage chamber 13 has a contact surface 16 and a guide portion 17 inside.
The contact surface 16 is an upstream end of the storage chamber 13 and is formed at the boundary with the inflow port 11, and is inclined with respect to the insertion direction of the lid 20 and the adapter 30, as shown in FIG. The adapter 30 is in contact with the packing 41 via the packing 41. The contact surface 16 is inclined so as to go from the inlet 11 to the outlet 12 as it goes from the inspection port 14 to the opposing wall surface (downward in FIG. 2).
The guide portion 17 is a surface formed at a position facing the contact surface 16.

  The lid portion 20 is a circular blocking member having an outer diameter that is substantially the same as the inner diameter of the inspection port 14, and the convex portion is formed on the outer periphery of the lid portion 20 facing the inner periphery of the inspection port 14. A groove portion 21 that engages with the groove 15 is formed. The groove portion 21 is formed in a spiral shape. When the lid portion 20 is rotated clockwise with the convex portion 15 disposed in the groove portion 21, the convex portion 15 slides in the groove portion 21, and the groove portion When the convex portion 15 is arranged at a predetermined position 21, the lid portion 20 is fixed so as not to be removable from the inspection port 14. Further, an engaging portion 22 protrudes from the lid portion 20 on the storage chamber 13 side. The engaging portion 22 has a circular shape in plan view, and has an end portion having a flange portion that protrudes outward over the entire circumference, and is rotatably connected to the adapter 30. In addition, the grip part 23 is exposed to the outside when the cover part 20 is attached to the joint body 10, and the user can manually rotate the cover part 20 by the grip part 23.

The adapter 30 has a claw portion 31 that engages with the engaging portion 22 of the lid portion 20 and a fixing portion 36 that fixes the check valve 50. In addition, the upstream end portion has a contact surface 34 that is inclined at the same angle as the contact surface 16 and a guided portion 35 that contacts the guide portion 17 at the time of attachment. The adapter 30 has a packing 40 on the outside of the claw portion 31 and a packing 41 on the contacted surface 34.
The claw portion 31 has a claw portion that protrudes inward, and connects the members so that the lid portion 20 and the adapter 30 can be relatively rotated in a state where the claw portion 31 is engaged with the engagement portion 22.
The fixing portion 36 is an opening formed at the center of the storage chamber 13 by a support portion extending from the inner peripheral surface of the adapter 30 toward the central axis, and the fixed portion 52 of the check valve 50 is inserted therethrough.
As will be described later, the end of the adapter 30 is in contact with the water stop portion 53 of the check valve 50 in a state where the check valve 50 is attached, and when no drainage occurs and when a back flow occurs from the downstream side. The drainage flow path is closed. Hereinafter, a place where the adapter 30 is in watertight contact with the water stop portion 53 will be described as a valve seat 37.

The check valve 50 includes a valve body 51 that is a U-shaped umbrella valve made of an elastic material such as rubber or silicon, and has a rod-like fixed portion 52 formed in the center and a downstream side of the fixed portion 52. It has an annular water stop 53 formed outward from the end in the circumferential direction. As shown in FIG. 3, the water stop portion 53 has an arc shape in a cross-sectional view, the entire periphery of the water stop portion 53 is in contact with the valve seat 37, and the fixed portion 52 is inserted through the fixing portion 36. ing.
In the state where the check valve 50 is attached to the fixed portion 36, the center of the check valve 50 coincides with the central axis C of the joint member 1, and the water stop portion 53 is caused by the elasticity of the check valve 50 itself. Stress is evenly applied toward the valve seat 37. Accordingly, the water stop portion 53 is in contact with the valve seat 37 evenly over the entire circumference using its own elasticity as a biasing means. When stress is applied to the check valve 50 from the upstream side, the water stop 53 is elastically deformed toward the downstream side to open the drainage flow path. On the other hand, when a stress from the downstream side is applied such as when a reverse flow occurs, the water stop 53 is stressed in a direction in which it is pressed toward the valve seat 37, and the drainage flow path is maintained closed. Further, since the fixed portion 52 has a retaining portion 521 formed by partially bulging, the check valve 50 is fixed to the fixing portion 36 when a fluid flow occurs from the upstream or downstream side. There is no more deviating.

  Below, construction of the joint member 1 in this embodiment is explained in full detail.

First, the claw portion 31 of the adapter 30 is pressed against the engaging portion 22 of the lid portion 20 to engage the lid portion 20 and the adapter 30. At this time, the claw part 31 gets over the flange part of the engaging part 22, and the cover part 20 and the adapter 30 are connected so as to be relatively rotatable.
Next, the fixed portion 52 of the check valve 50 is inserted into the fixing portion 36 of the adapter 30 and attached. At this time, the fixed portion 52 has a tapered shape toward the end portion, and can be easily inserted. Further, the water stop portion 53 of the check valve 50 contacts the valve seat 37 over the entire circumference.
Next, the lid portion 20 and the adapter 30 are inserted from the inspection port 14, the lid portion 20 is rotated clockwise with the convex portion 15 being disposed in the groove portion 21, and the adapter 30 and the check valve 50 are moved. The construction is completed by placing it in the storage chamber 13. At this time, the inclination angle and the insertion direction of the adapter 30 are guided by the guide portion 17 formed on the joint body 10 and the guided portion 35 formed on the adapter 30. Further, since the contact surface 16 and the contacted surface 34 are inclined with respect to the insertion direction, a part of the stress applied in the insertion direction during the insertion is caused by the contact surface 16 and the contacted surface 34. Are converted into stresses in directions close to each other. As a result, the contact surface 16 and the contacted surface 34 are brought into pressure contact with each other via the packing 41 to be in a watertight state. The force converted at the time of insertion also acts in the direction in which the contact surface 16 and the contacted surface 34 are separated from each other, but the adapter 30 is prevented from being separated from the contact surface 16 by the guide portion 17. It becomes possible to maintain a watertight state reliably.
When the construction is completed, the water stop 53 is disposed at the lower end of the check valve 50. Moreover, the water stop part 53 is arrange | positioned in the bottom part of the drainage flow path in the location where the non-return valve 50 is arrange | positioned.

  When performing maintenance of the joint member 1, the lid 20, the adapter 30, and the check valve 50 can be taken out from the inspection port 14 by rotating the lid 20 counterclockwise.

  Below, operation | movement of the joint member 1 in this embodiment is explained in full detail.

First, when there is no drainage from the upstream side with respect to the joint member 1 and no backflow of fluid or the like is generated from the downstream side, the check valve 50 is caused by its own elasticity so that the water stop portion 53 contacts the valve seat 37. It touches. Thereby, the drainage flow path inside the joint member 1 is blocked by the water stop portion 53, and it becomes possible to prevent backflow of odor, drainage, pests and the like from the downstream side.
When drainage flows into the joint member 1 from the upstream side due to the use of equipment or the like, the drainage comes into contact with the water stop portion 53 of the check valve 50 from the upstream side, and as shown in FIG. The water stop portion 53 is separated from the valve seat 37 by the water pressure, so that the drainage flow path in the joint member 1 is opened and the drainage is discharged to the downstream side. When the inflow of the drainage from the upstream side is completed, the check valve 50 is restored by its own elastic force, and the water stop 53 again contacts the valve seat 37 over the entire circumference and closes the drain passage. At this time, the water stop 53 is disposed at the lower end of the check valve 50, and the water stop 53 is disposed at the bottom of the drainage flow path, so that water remains upstream of the check valve 50 at the end of drainage. Will not occur.
On the other hand, when a backflow of fluid or the like occurs from the downstream side of the joint member 1, the backflowed fluid contacts the water stop portion 53 of the check valve 50 from the downstream side. At this time, as shown in FIG. 4 (b), the fluid or the like abutted from the downstream side applies stress so as to press the water stop portion 53 against the valve seat 37, so that the drainage passage is kept closed. The

  According to the present invention according to the first embodiment, the water stop portion 53, the valve seat 37, and the water stop portion 53 of the check valve 50 are circular in the axial direction, and the center thereof is aligned with the central axis C of the joint member 1. Therefore, even if the joint member 1 is rotated 360 degrees in any direction with respect to the central axis of the horizontal pulling tube, the water stop portion 53 is formed at the lower end of the check valve 50. Therefore, the joint member 1 can be connected to the horizontal pulling tube after being rotated 360 degrees in any direction with respect to the central axis of the horizontal pulling tube. Therefore, for example, as shown in FIG. 9, it is possible to prevent water from remaining on the upstream side of the check valve 50 even when the inspection port 14 faces downward. Even if the direction of the inspection port 14 is directed to the side, it is possible to prevent water from remaining on the upstream side of the check valve 50. (Not shown)

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In addition, the joint member 1 according to the second embodiment can be fixed in a state where the direction of the inspection port 14 is in an arbitrary direction around the central axis C of the joint main body 10. For ease of explanation, the description using FIGS. 6 to 9 will be made up, down, left, and right with reference to a state in which the inspection port faces upward as shown in FIG.

  As shown in FIG. 6, the joint member 1 according to the present embodiment is connected to the joint body 10 having the inspection port 14 on the wall surface, the lid portion 20 that closes the inspection port 14, and the lid portion 20. It consists of an adapter 30 arranged and a check valve 50 attached to the adapter 30. Further, the joint member 1 is connected to a cylindrical horizontal pulling tube extending substantially in the horizontal direction on the upstream side and the downstream side. In FIG. 6, the horizontal pulling pipe connected to the upstream side and the downstream side is indicated by a two-dot chain line.

The joint body 10 is a cylindrical casing made of a translucent hard resin, and has a cylindrical inlet 11 and an outlet 12 to which a horizontal pipe is connected at its upstream end and downstream end. In addition, a storage chamber 13 for storing an adapter 30 and a check valve 50 (described later) is formed inside, and an inspection port 14 is opened in the wall surface of the storage chamber 13.
The inflow port 11 and the outflow port 12 have a cylindrical shape in which the central axes C coincide with each other, and have an inner diameter that is substantially the same as the outer diameter of the horizontal pulling tube connected by bonding.
The inspection port 14 is a circular opening formed in the wall surface of the joint body 10, and a convex portion 15 is formed on the inner periphery thereof toward the inside. The convex portions 15 are projections that engage with a lid portion 20 to be described later, and are formed at four locations at equal intervals. When the lid 20 and the adapter 30 are inserted into the inspection port 14, the packing 40 attached to the adapter 30 extends over the entire inner circumference of the inspection port 14 below the convex portion 15 (on the storage chamber 13 side). They are in contact with each other and are watertightly closed in a state where the lid portion 20 is attached.
The storage chamber 13 is located between the inflow port 11 and the outflow port 12, and as shown in FIGS. 1 and 2, the storage chamber 13 is directly below the inspection port 14 in a state where the inspection port 14 is arranged facing upward. Formed in position. The storage chamber 13 has a contact surface 16 and a guide portion 17 inside.
The contact surface 16 is an upstream end of the storage chamber 13 and is formed at the boundary with the inflow port 11, and is inclined with respect to the insertion direction of the lid 20 and the adapter 30, as shown in FIG. The adapter 30 is in contact with the packing 41 via the packing 41. The contact surface 16 is inclined so as to go from the inlet 11 to the outlet 12 as it goes from the inspection port 14 to the opposing wall surface (downward in FIG. 2).
The guide portion 17 is a surface formed at a position facing the contact surface 16.

  The lid portion 20 is a circular closing member having an outer diameter that is substantially the same as the inner diameter of the inspection port 14, and is formed on the outer periphery of the lid portion 20 that faces the inner periphery of the inspection port 14. An engaging groove 21 is formed. The groove portion 21 is formed in a spiral shape. When the lid portion 20 is rotated clockwise with the convex portion 15 disposed in the groove portion 21, the convex portion 15 slides in the groove portion 21, and the groove portion When the convex portion 15 is arranged at a predetermined position 21, the lid portion 20 is fixed so as not to be removable from the inspection port 14. Further, an engaging portion 22 protrudes from the lid portion 20 on the storage chamber 13 side. The engaging portion 22 has a circular shape in plan view, and has an end portion having a flange portion that protrudes outward over the entire circumference, and is rotatably connected to the adapter 30. In addition, the grip part 23 is exposed to the outside when the cover part 20 is attached to the joint body 10, and the user can manually rotate the cover part 20 by the grip part 23.

The adapter 30 has a claw portion 31 that engages with the engaging portion 22 of the lid portion 20 and a fixing portion 36 that fixes the check valve 50. In addition, the upstream end portion has a contact surface 34 that is inclined at the same angle as the contact surface 16 and a guided portion 35 that contacts the guide portion 17 at the time of attachment. The adapter 30 has a packing 40 on the outside of the claw portion 31 and a packing 41 on the contacted surface 34.
The claw portion 31 has a claw portion that protrudes inward, and connects the members so that the lid portion 20 and the adapter 30 can be relatively rotated in a state where the claw portion 31 is engaged with the engagement portion 22.
The fixed portion 36 is a cylindrical portion extending from the guided portion 35 toward the downstream side, and a groove 38 is formed over the entire periphery, and an annular packing 39 is fitted on the outer periphery. .

The check valve 50 includes a valve body 51 and a casing 55 to which the valve body 51 is attached, and is connected to the adapter 30 so as to be rotatable.
The valve body 51 has a plate shape made of an elastic material such as rubber or silicon, and a support portion 541 formed at one end is held by the casing 55, and the other end can be separated from the casing 55. . In the following description, an end portion on the side facing the support portion 541 is referred to as an opening / closing end portion 542. Further, the valve body 51 is in contact with the end portion of the casing 55 by the water stop portion 53. Hereinafter, a location where the casing 55 contacts the water stop portion 53 will be described as a valve seat 37.
The casing 55 has a tubular shape having an inward flange portion 57 at the upstream end portion and a valve seat 37 at the downstream end portion, and has a drain passage formed therein, and the flange portion 57 is It is fitted in a groove 38 formed in the fixing portion 36 of the adapter 30. At this time, the flange portion 57 is slidable in the groove 38, so that the casing 55 cannot be removed from the adapter 30 but can be rotated. Note that the rotation axis of the casing 55 coincides with the central axis C of the joint body 10. In addition, the casing 55 has an upstream inner diameter that is substantially the same as the outer diameter of the fixed portion 36, and in a state where the check valve 50 is attached to the adapter 30, the packing 39 that is looped around the outer periphery of the fixed portion 36 is the casing 55. And the adapter 30. Therefore, the check valve 50 can freely rotate with respect to the adapter 30 and the adapter 30 and the check valve 50 are sealed by the packing 39 regardless of the orientation. Become.
The non-return valve 50 closes the drainage flow path when there is no drainage by the water stop 53 abutting against the valve seat 37. When stress is applied to the valve body 51 from the upstream side, the end of the valve body 51 opposite to the support portion 541 is separated from the valve seat 37 toward the downstream side, or to the downstream side. The drainage flow path is opened by elastically deforming toward. On the other hand, when a stress is applied from the downstream side, such as when a reverse flow occurs, the water stop 53 is applied in a direction in which it is pressed against the valve seat 37 to maintain the drainage channel closed.

Here, the check valve 50 can prevent water from remaining on the upstream side of the check valve 50 at the end of drainage in a state where the water stop portion 53 of the valve body 51 is disposed at the lower end thereof. Become. Further, since the valve body 51 operates with the largest opening / closing end portion 542 and operates with the lightest stress, the support portion 541 is disposed at the highest position as shown in FIG. In the state of being arranged at the lowest position, the drainage performance of the check valve 50 is the best. Therefore, the check valve 50 according to this embodiment is configured such that the support portion 541 of the valve body 51 is disposed at the highest position and the end portion of the opening / closing end portion 542 is disposed at the lowest position. Since the water stop part 53 is arrange | positioned, a water residue does not arise in the upstream of the non-return valve 50, and it becomes the suitable arrangement | positioning which was most excellent in drainage performance.
On the other hand, if the open / close end 542 is disposed upward, the valve body 51 may be separated from the valve seat 37 by its own weight, and the drainage channel may not be blocked. That is, the check valve 50 of the present invention has a suitable arrangement for exerting its function.

  Below, construction of the joint member 1 in this embodiment is explained in full detail.

First, the claw portion 31 of the adapter 30 is pressed against the engaging portion 22 of the lid portion 20 to engage the lid portion 20 and the adapter 30. At this time, the claw part 31 gets over the flange part of the engaging part 22, and the cover part 20 and the adapter 30 are connected so as to be relatively rotatable.
Next, the flange portion 57 of the check valve 50 is fitted to the fixing portion 36 of the adapter 30. At this time, since the flange portion 57 can slide in the groove 38 of the fixed portion 36, the check valve 50 can freely rotate with respect to the adapter 30.
Next, the check valve 50 is rotated to adjust its orientation so that a suitable arrangement is obtained. As described above, the check valve 50 according to the present embodiment has the valve body at the lower end in a state where the support portion 541 of the valve body 51 is disposed at the highest position and the opening / closing end portion 542 is disposed at the lowest position. Since the water stop part 53 of 51 is arrange | positioned, a water residue does not arise in the upstream of the non-return valve 50, and it becomes the suitable arrangement | positioning which was most excellent in drainage performance. In addition, since the packing 39 is interposed between the adapter 30 and the check valve 50, the watertight state is always maintained.
Next, the lid portion 20, the adapter 30, and the check valve 50 are inserted from the inspection port 14, and the lid portion 20 is rotated clockwise with the convex portion 15 disposed in the groove portion 21. The construction is completed by arranging the check valve 50 in the storage chamber 13. At this time, the inclination angle and the insertion direction of the adapter 30 are guided by the guide portion 17 formed on the joint body 10 and the guided portion 35 formed on the adapter 30. Further, since the contact surface 16 and the contacted surface 34 are inclined with respect to the insertion direction, a part of the stress applied in the insertion direction during the insertion is caused by the contact surface 16 and the contacted surface 34. Are converted into stresses in directions close to each other. As a result, the contact surface 16 and the contacted surface 34 are brought into pressure contact with each other via the packing 41 to be in a watertight state. The force converted at the time of insertion also acts in the direction in which the contact surface 16 and the contacted surface 34 are separated from each other, but the adapter 30 is prevented from being separated from the contact surface 16 by the guide portion 17. It becomes possible to maintain a watertight state reliably.

  When performing maintenance of the joint member 1, the lid 20, the adapter 30, and the check valve 50 can be taken out from the inspection port 14 by rotating the lid 20 counterclockwise.

  Below, operation | movement of the joint member 1 in this embodiment is explained in full detail.

First, when there is no drainage from the upstream side with respect to the joint member 1 and no backflow of fluid or the like is generated from the downstream side, the non-return valve 50 has the water stop 53 formed by the valve seat 37 due to its own elasticity and weight. Abut. Thereby, the drainage flow path inside the joint member 1 is blocked by the water stop portion 53, and it becomes possible to prevent backflow of odor, drainage, pests and the like from the downstream side.
When drainage flows into the joint member 1 from the upstream side due to the use of equipment or the like, the drainage comes into contact with the water stop 53 of the check valve 50 from the upstream side, and as shown in FIG. The water stop portion 53 is separated from the valve seat 37 by the water pressure, so that the drainage flow path in the joint member 1 is opened and the drainage is discharged to the downstream side. At this time, since the drainage first comes into contact with the opening / closing end 542, the valve body 51 is easily separated from the valve seat 37. When the inflow of the drainage from the upstream side is finished, the check valve 50 is brought into contact with the valve seat 37 over the entire circumference and closes the drainage flow path by its own elastic force and its own weight. At this time, the water stop 53 is the lower end of the check valve 50 and is disposed at the bottom of the drainage flow path, so that no water remains upstream of the check valve 50 at the end of drainage.
On the other hand, when a backflow of fluid or the like occurs from the downstream side of the joint member 1, the backflowed fluid contacts the water stop portion 53 of the check valve 50 from the downstream side. At this time, as shown in FIG. 8B, the fluid or the like abutted from the downstream side applies stress so as to press the water stop portion 53 against the valve seat 37, so that the drainage passage is kept closed. The

  According to the present invention according to the second embodiment, since the check valve 50 is rotatable with respect to the adapter 30, the joint member 1 can be arbitrarily rotated 360 degrees with respect to the central axis of the horizontal pulling tube. The opening / closing end portion 542 of the water stop portion 53 can always be disposed at the lower end of the check valve 50 by adjusting the direction of the check valve 50 inside the storage chamber 13 even if the check valve 50 is rotated in the direction. As a result, it is possible to prevent water from remaining on the upstream side of the check valve 50 at all times. For example, as shown in FIG. 9, even when the inspection port 14 is facing downward, it is possible to obtain a suitable arrangement by adjusting the direction of the check valve 50.

When the joint member 1 of the present invention according to each embodiment is attached to a horizontal pulling pipe that is continuous from the air conditioner 100, as shown in FIG. 10, the attachment is performed so that the inspection port 14 faces downward. Maintenance becomes easy. That is, when the joint member 1 is attached to the horizontal pipe that is continuous from the air conditioner 100, the operator removes the inspection lid 110 provided on the ceiling below the floor, and the joint disposed on the back of the ceiling from below. Maintenance of the member 1 is performed. At this time, since the joint member 1 is attached so that the inspection port 14 faces downward, it is possible to easily remove the lid portion 20 and perform internal cleaning or the like.
Moreover, as shown in FIG. 11, when the joint member 1 is attached to the drainage pipe continuous from the refrigerator-freezer 200, maintenance is performed from the side by attaching the inspection port 14 to the side. Becomes easy. That is, when the joint member 1 is attached to the horizontal pulling tube continuous from the refrigerator-freezer 200, the operator performs maintenance on the joint member 1 from below the refrigerator-freezer 200. At this time, since the joint member 1 is mounted so that the inspection port 14 faces sideward, the inside of the joint member 1 can be cleaned without interfering with the refrigerator-freezer disposed above the joint member 1. It becomes.
In addition, since the joint member 1 in each said embodiment is preventing the backflow only by the non-return valve 50, and does not use sealing water, draining a user at the time of removal of the cover part 20, The surrounding area will not be contaminated by drainage.

The joint member of the present invention is as described above, but the present invention is not limited to the shape of each of the above embodiments, and various design changes may be made without departing from the gist of the invention.
For example, you may comprise the cover part 20 and the adapter 30 in each embodiment as an integral member.
Further, the pipe on which the joint member 1 is arranged is not limited to the pipe that is continuous from the air conditioner or the refrigerator-freezer, and may be connected to a pipe that is continuous from other equipment.

DESCRIPTION OF SYMBOLS 1 Joint member 10 Joint body 11 Inlet 12 Outlet 13 Storage chamber 14 Inspection port 15 Convex part 16 Contact surface 17 Guide part 20 Lid part 21 Groove part 22 Engagement part 23 Grip part 30 Adapter 31 Claw part 34 Contact surface 35 Guided part 36 Fixing part 37 Valve seat 38 Groove 39 Packing 40 Packing 41 Packing 50 Check valve 51 Valve body 52 Fixed part 521 Stopping part 53 Water stop part 541 Supporting part 542 Opening / closing end part 55 Casing 57 collar part 100 Air conditioner 110 Lid 200 Freezer refrigerator

Claims (3)

A joint member connected to the horizontal pipe,
An inspection port formed on the wall surface;
A lid that closes the inspection port;
It is arranged inside the joint member so that it can be detached from the inspection port, and it has a check valve that prevents backflow of fluid.
The check valve has a water stop portion that closes the drainage flow path, and when the joint member is connected to the horizontal pulling pipe, the check valve can be used even when the direction of the inspection port is an arbitrary direction. A joint member characterized in that a water stop portion can be arranged at the lower end of the joint. The joint member is
With an adapter that is inserted into the joint member from the inspection port,
The check valve is a fixed portion fixed to the adapter;
2. The joint member according to claim 1, wherein the joint member is an umbrella valve having an annular water stop formed from a downstream end portion of the fixed portion toward the outer side in the circumferential direction. The joint member is
With an adapter that is inserted into the joint member from the inspection port,
The joint member according to claim 1, wherein the check valve can be attached to the adapter while being rotated in an arbitrary direction.

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