JP7064726B2 - Joint member - Google Patents

Description

The present invention relates to a joint member attached to a drainage pipe and provided with a check valve for preventing a backflow of fluid from the downstream side.

As a joint member connected to a drainage pipe, as in Patent Document 1, a member having a check valve inside to prevent a backflow of fluid from the downstream side is known. The joint member described in Patent Document 1 is connected to a drainage pipe that discharges drainage generated by using equipment such as a refrigerator / freezer and an air conditioner, and the drainage pipe is arranged in a substantially horizontal direction. It is a horizontal pulling pipe.
The check valve has a valve body 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 by blocking the drainage flow path, the backflow of fluid such as odor and drainage from the downstream side or pests is prevented. When a backflow of fluid occurs from the downstream side, stress is applied to the valve body in the direction of being pressed against the valve seat, so that the drainage flow path is maintained to be blocked. On the other hand, when the drainage is discharged from the upstream side, the valve body is rotated by the drainage, and the drainage flow path is temporarily opened to discharge the drainage to the downstream side. That is, in the check valve, the valve body closes the drainage flow path when there is no drainage or when a backflow of fluid occurs from the downstream side, and the drainage flow path is opened when drainage occurs from the upstream side. It has a structure that rotates to.
In addition, the joint member has an inspection port and a lid that closes the inspection port at the top, and by removing the lid, the check valve can be attached / detached from the inspection port and the inside of the joint member can be cleaned. It will be possible.

Japanese Unexamined Patent Publication No. 2007-2245229

Since the above-mentioned joint member opens and closes the valve body using gravity, the vertical direction of the check valve cannot be changed, and depending on the construction environment, the check valve may be attached / detached or cleaned from the inspection port. Was sometimes difficult. For example, when the joint member is connected to a continuous drainage pipe from the air conditioner, the joint member is arranged behind 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 located on the upper part of the joint member from below, and attaches / detaches and cleans the check valve. Was difficult to do. Further, when the joint member is connected to a continuous drainage pipe from the freezer / refrigerator, equipment such as a freezer / refrigerator may be arranged above the inspection port, and a lid arranged above the joint member. It was difficult to remove the part.

The present invention has been invented in view of the above problems, and an object of the present invention is to provide a joint member capable of easily attaching / detaching and cleaning a check valve from an inspection port.

The present invention according to claim 1 is a joint member connected to a horizontal pulling pipe.
An inspection port formed on the wall and
The lid that closes the inspection port and
A check valve that is removable from the inspection port and is placed inside the joint member to prevent backflow of fluid ,
It is equipped with an adapter that is inserted into the joint member from the inspection port .
The check valve has a water stop portion that closes the drainage flow path, and even when the joint member is connected to the horizontal pull pipe, the inspection port is oriented in an arbitrary direction. The water stop portion can be arranged at the lower end of the check valve ,
The adapter has a fixing part to which the check valve is attached and
It has a valve seat that comes into contact with the water stop portion, and has a valve seat.
The valve seat is a joint member characterized in that it projects from the fixed portion toward the water stop portion .

According to the second aspect of the present invention, the joint member is
The check valve has a fixed portion fixed to the adapter and a fixed portion.
The joint member according to claim 1, wherein the umbrella valve has an annular water stop portion formed from the downstream end portion of the fixed portion toward the outside in the circumferential direction.

According to the third aspect of the present invention, the joint member is
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.

In the joint member of the present invention, even when the direction of the inspection port is arbitrary, the water stop portion can be arranged at the lower end of the check valve, so that the check valve can be used regardless of the direction of the inspection port. It becomes possible to play a function. Therefore, it is possible to direct the inspection port downward or to the side surface according to the construction situation, and maintenance and cleanability are improved. Further, since the water stop portion can be arranged at the lower end of the check valve, it is possible to prevent water residue from being generated on the upstream side of the check valve at the end of drainage.

It is sectional drawing which shows the joint member of this invention. It is an exploded view which shows the joint member. It is sectional drawing which shows the check valve. (A) A cross-sectional view showing an operation when a fluid is generated from the upstream side (b) A cross-sectional view showing an operation when a fluid flows back from the downstream side. It is sectional drawing which shows the case where the inspection port is turned down. It is sectional drawing which shows the joint member of 2nd Embodiment. It is an exploded view which shows the joint member. (A) A cross-sectional view showing an operation when a fluid is generated from the upstream side (b) A cross-sectional view showing an operation when a fluid flows back from the downstream side. It is sectional drawing which shows the case where the inspection port is turned down. It is a reference figure which shows the construction state of a joint member. It is a reference figure which shows the construction state of a joint member.

Hereinafter, the joint member of the present invention will be described with reference to the drawings. It should be noted that the description described below facilitates the understanding of the embodiments, and is not intended to limit and understand the present invention.

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

As shown in FIG. 1, the joint member 1 of the present embodiment has 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 a lid portion 20 connected to the inside of the joint main body 10. It consists of an adapter 30 to be arranged and a check valve 50 attached to the adapter 30. Further, the joint member 1 is connected to a cylindrical horizontal pulling pipe extending in a substantially horizontal direction on the upstream side and the downstream side thereof. In FIG. 1, the horizontal pulling pipe connected to the upstream side and the downstream side is shown by a two-dot chain line.

As shown in FIGS. 1 and 2, the joint body 10 is a tubular casing made of a translucent hard resin, and has a cylindrical shape to which a horizontal pulling pipe is connected at its upstream end and downstream end. It has an inlet 11 and an outlet 12. A storage chamber 13 for accommodating an adapter 30 and a check valve 50, which will be described later, is formed inside the joint main body 10, and an inspection port 14 is opened on 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 axis C matches, and have an inner diameter that is substantially the same as the outer diameter of the horizontal pulling pipe connected by adhesion.
The inspection port 14 is a circular opening formed on the wall surface of the joint main body 10, and a convex portion 15 is formed inward on the inner circumference thereof. The convex portion 15 is a protrusion that engages with the lid portion 20, which will be described later, and is formed at four points at equal intervals. Further, 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 with the lid 20 attached.
The storage chamber 13 is between the inflow port 11 and the outflow port 12, and is directly below the inspection port 14 when the inspection port 14 is arranged facing upward as shown in FIGS. 1 and 2. It is formed in the position. Further, the storage chamber 13 has a contact surface 16 and a guide portion 17 inside.
The contact surface 16 is an upstream end portion of the storage chamber 13, is formed at a boundary with the inflow port 11, is inclined with respect to the insertion direction of the lid portion 20 and the adapter 30, and is as shown in FIG. , It is in contact with the adapter 30 via the packing 41. The contact surface 16 is inclined so as to go from the inflow port 11 to the outflow port 12 as it advances from the inspection port 14 to the facing wall surface (lower side 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 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 circumference of the inspection port 14. A groove 21 that engages with 15 is formed. The groove portion 21 is formed in a spiral shape, and when the lid portion 20 is rotated clockwise with the convex portion 15 arranged in the groove portion 21, the convex portion 15 slides in the groove portion 21 and the groove portion is formed. When the convex portion 15 is arranged at a predetermined position of 21, the lid portion 20 is fixed so as not to be removable from the inspection port 14. Further, an engaging portion 22 is provided so as to project from the storage chamber 13 side of the lid portion 20. The engaging portion 22 has a circular shape in a plan view, and has a flange portion that protrudes outward over the entire circumference at the end thereof, and is rotatably connected to the adapter 30. In the state where the lid portion 20 is attached to the joint main body 10, the grip portion 23 is exposed to the outside, and the user can manually rotate the lid portion 20 by the grip portion 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. Further, the upstream end portion has a contacted surface 34 inclined at the same angle as the contact surface 16 and a guided portion 35 that abuts on the guide portion 17 at the time of mounting. The adapter 30 has a packing 40 on the outside of the claw portion 31 and a packing 41 on the contact surface 34.
The claw portion 31 has a claw portion that protrudes inward, and in a state of being engaged with the engaging portion 22, the member is connected so that the lid portion 20 and the adapter 30 can rotate relative to each other.
The fixing portion 36 is an opening formed in 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, in the state where the check valve 50 is attached, the end of the adapter 30 is in contact with the water stop portion 53 of the check valve 50, and when there is no drainage and when a backflow occurs from the downstream side. The drainage channel is blocked in. Hereinafter, the portion where the adapter 30 comes into close contact with the water stop portion 53 will be described as the valve seat 37.

The check valve 50 is composed of a valve body 51 which is a T-shaped umbrella valve in cross section made of an elastic material such as rubber or silicon, and has a rod-shaped fixed portion 52 formed in the center and a downstream side of the fixed portion 52. It has an annular water stop portion 53 formed from the end portion toward the outside 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 circumference of the water stop portion 53 is in contact with the valve seat 37, and the fixed portion 52 is inserted into the fixed portion 36. ing.
In the state where the check valve 50 is attached to the fixing 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 due to the elasticity of the check valve 50 itself. Stress is evenly applied toward the valve seat 37. Therefore, the water stop portion 53 is evenly in contact with the valve seat 37 over the entire circumference by using its own elasticity as an urging means. Then, when stress is applied to the check valve 50 from the upstream side, the water stop portion 53 elastically deforms toward the downstream side to open the drainage flow path. On the other hand, when stress is applied from the downstream side such as when a backflow occurs, stress is applied to the water stop portion 53 in the direction of being pressed toward the valve seat 37, and the drainage flow path is maintained to be blocked. Further, since the fixed portion 52 has a retaining portion 521 formed by partially bulging, the check valve 50 is a fixing portion 36 when a fluid flow from the upstream or downstream side occurs. It will not come off more.

The construction of the joint member 1 in the present embodiment will be described in detail below.

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 with the adapter 30. At this time, the claw portion 31 gets over the flange portion of the engaging portion 22, and the lid portion 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 fixed 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 comes into contact with 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 arranged in the groove portion 21, and the adapter 30 and the check valve 50 are inserted. Construction is completed by arranging it in the storage room 13. At this time, the tilt 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 contact surface 34 are inclined with respect to the insertion direction, a part of the stress applied in the insertion direction at the time of the insertion is partially applied to the contact surface 16 and the contact surface 34. Is converted into stress in directions close to each other. As a result, the contact surface 16 and the contact surface 34 are pressed against each other via the packing 41 to become a watertight state. The force converted at the time of insertion also acts in the direction of separating the contact surface 16 and the contact surface 34, but the guide portion 17 prevents the adapter 30 from separating from the contact surface 16. It is possible to reliably maintain the watertight state.
At the time of completion of the above construction, the water stop portion 53 is arranged at the lower end of the check valve 50. Further, the water stop portion 53 is arranged at the bottom of the drainage flow path at the place where the check valve 50 is arranged.

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

The operation of the joint member 1 in the present embodiment will be described in detail below.

First, when there is no drainage from the upstream side of the joint member 1 and no backflow of fluid or the like is generated from the downstream side, the check valve 50 has its own elasticity and the water stop portion 53 hits the valve seat 37. I'm in contact. As a result, the drainage flow path inside the joint member 1 is blocked by the water stop portion 53, and it is possible to prevent backflow of odors, drainage, pests, etc. 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 drainage is performed as shown in FIG. 4A. When the water stop portion 53 is separated from the valve seat 37 by the water pressure of the above, the drainage flow path in the joint member 1 is opened, and the drainage is discharged to the downstream side. When the inflow of drainage from the upstream side is completed, the check valve 50 is restored by its own elastic force, and the water stop portion 53 again abuts on the valve seat 37 over the entire circumference and closes the drainage flow path. At this time, since the water stop portion 53 is arranged at the lower end of the check valve 50 and the water stop portion 53 is arranged at the bottom of the drainage flow path, water remains upstream of the check valve 50 at the end of drainage. Will not occur.
On the other hand, when a backflow of a fluid or the like occurs from the downstream side of the joint member 1, the backflowed fluid comes into contact with the water stop portion 53 of the check valve 50 from the downstream side. At this time, as shown in FIG. 4B, the fluid or the like that comes into contact with the water from the downstream side applies stress so as to press the water stop portion 53 toward the valve seat 37, so that the drainage flow path is maintained to be blocked. Ru.

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 with respect to the central axis of the horizontal pull pipe in an arbitrary direction, 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 pipe after being rotated 360 degrees with respect to the central axis of the horizontal pulling pipe. Therefore, for example, as shown in FIG. 9, even when the inspection port 14 faces downward, it is possible to prevent water residue from being generated on the upstream side of the check valve 50. Even if 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, the second embodiment of the present invention will be described with reference to FIGS. 6 to 9.

Further, the joint member 1 according to the second embodiment can be fixed in a state where the inspection port 14 is oriented in an arbitrary direction with the central axis C of the joint main body 10 as the center. For the sake of simplicity, in the description using FIGS. 6 to 9, as shown in FIG. 6, the upper, lower, left and right sides will be described with reference to the state in which the inspection port faces upward.

As shown in FIG. 6, the joint member 1 of the present embodiment has 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 a lid portion 20 connected to the inside of the joint main body 10. It consists of an adapter 30 to be arranged and a check valve 50 attached to the adapter 30. Further, the joint member 1 is connected to a cylindrical horizontal pulling pipe extending in a substantially horizontal direction on the upstream side and the downstream side thereof. In FIG. 6, the horizontal pulling pipe connected to the upstream side and the downstream side is shown by a two-dot chain line.

The joint body 10 is a tubular casing made of translucent hard resin, and has a cylindrical inlet 11 and an outlet 12 to which a horizontal pulling pipe is connected at its upstream end and downstream end. A storage chamber 13 for accommodating an adapter 30 and a check valve 50, which will be described later, is formed inside, and an inspection port 14 is opened on 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 axis C matches, and have an inner diameter that is substantially the same as the outer diameter of the horizontal pulling pipe connected by adhesion.
The inspection port 14 is a circular opening formed on the wall surface of the joint main body 10, and a convex portion 15 is formed inward on the inner circumference thereof. The convex portion 15 is a protrusion that engages with the lid portion 20, which will be described later, and is formed at four points at equal intervals. Further, 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 with the lid 20 attached.
The storage chamber 13 is between the inflow port 11 and the outflow port 12, and is directly below the inspection port 14 when the inspection port 14 is arranged facing upward as shown in FIGS. 1 and 2. It is formed in the position. Further, the storage chamber 13 has a contact surface 16 and a guide portion 17 inside.
The contact surface 16 is an upstream end portion of the storage chamber 13, is formed at a boundary with the inflow port 11, is inclined with respect to the insertion direction of the lid portion 20 and the adapter 30, and is as shown in FIG. , It is in contact with the adapter 30 via the packing 41. The contact surface 16 is inclined so as to go from the inflow port 11 to the outflow port 12 as it advances from the inspection port 14 to the facing wall surface (lower side 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 substantially the same as the inner diameter of the inspection port 14, and the convex portion 15 is formed on the outer periphery of the lid portion 20 facing the inner circumference of the inspection port 14. A groove portion 21 to be engaged is formed. The groove portion 21 is formed in a spiral shape, and when the lid portion 20 is rotated clockwise with the convex portion 15 arranged in the groove portion 21, the convex portion 15 slides in the groove portion 21 and the groove portion is formed. When the convex portion 15 is arranged at a predetermined position of 21, the lid portion 20 is fixed so as not to be removable from the inspection port 14. Further, an engaging portion 22 is provided so as to project from the storage chamber 13 side of the lid portion 20. The engaging portion 22 has a circular shape in a plan view, and has a flange portion that protrudes outward over the entire circumference at the end thereof, and is rotatably connected to the adapter 30. In the state where the lid portion 20 is attached to the joint main body 10, the grip portion 23 is exposed to the outside, and the user can manually rotate the lid portion 20 by the grip portion 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. Further, the upstream end portion has a contacted surface 34 inclined at the same angle as the contact surface 16 and a guided portion 35 that abuts on the guide portion 17 at the time of mounting. The adapter 30 has a packing 40 on the outside of the claw portion 31 and a packing 41 on the contact surface 34.
The claw portion 31 has a claw portion that protrudes inward, and in a state of being engaged with the engaging portion 22, the member is connected so that the lid portion 20 and the adapter 30 can rotate relative to each other.
The fixed portion 36 is a tubular portion extending from the guided portion 35 toward the downstream side, a groove 38 is formed over the entire circumference, and an annular packing 39 is fitted on the outer periphery thereof. ..

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 is separable from the casing 55. .. Hereinafter, the end portion on the side facing the support portion 541 will be 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, the portion where the casing 55 comes into contact with the water stop portion 53 will be described as the 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 drainage flow path formed therein, and the flange portion 57 is described above. 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, whereby the casing 55 cannot be removed from the adapter 30 but is rotatable. The rotation axis of the casing 55 coincides with the central axis C of the joint body 10. Further, the inner diameter of the casing 55 on the upstream side 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 annularly attached to 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 packing 39 seals the adapter 30 and the check valve 50 regardless of the orientation of the check valve 50. Become.
In the check valve 50, the water stop portion 53 comes into contact with the valve seat 37 to block the drainage flow path when there is no drainage. When stress is applied to the valve body 51 from the upstream side, the end portion of the valve body 51 opposite to the support portion 541 is separated from the valve seat 37 toward the downstream side, or toward the downstream side. The drainage channel is opened by elastically deforming toward it. On the other hand, when stress is applied from the downstream side such as when a backflow occurs, the stress is applied in the direction in which the water stop portion 53 is pressed toward the valve seat 37, and the drainage flow path is maintained to be blocked.

Here, the check valve 50 can prevent water residue from being generated 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 arranged at the lower end thereof. Become. Further, since the opening / closing end portion 542 of the valve body 51 operates with the largest operation and the lightest stress, the support portion 541 is arranged at the highest position and the opening / closing end portion 542 end portion is arranged as shown in FIG. The drainage performance of the check valve 50 is the best when it is arranged at the lowest position. Therefore, in the check valve 50 in the present embodiment, the support portion 541 of the valve body 51 is arranged at the highest position, and the opening / closing end portion 542 end is arranged at the lowest position. Since the water stop portion 53 is arranged, no water residue is generated on the upstream side of the check valve 50, and the arrangement is suitable for having the best drainage performance.
On the other hand, if the opening / closing end portion 542 is arranged upward, the valve body 51 may be separated from the valve seat 37 due to its own weight, and the drainage flow path may not be blocked. That is, the check valve 50 of the present invention has a suitable arrangement for exerting its function.

The construction of the joint member 1 in the present embodiment will be described in detail below.

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 with the adapter 30. At this time, the claw portion 31 gets over the flange portion of the engaging portion 22, and the lid portion 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 is slidable in the groove 38 of the fixing 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 as to have a suitable arrangement. As described above, the check valve 50 in the present embodiment has a valve body at the lower end in a state where the support portion 541 of the valve body 51 is arranged at the highest position and the opening / closing end portion 542 end is arranged at the lowest position. Since the water stop portion 53 of 51 is arranged, no water residue is generated on the upstream side of the check valve 50, and the arrangement is suitable with the best drainage performance. 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 arranged in the groove portion 21 to form the adapter 30. Construction is completed by arranging the check valve 50 in the storage chamber 13. At this time, the tilt 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 contact surface 34 are inclined with respect to the insertion direction, a part of the stress applied in the insertion direction at the time of the insertion is partially applied to the contact surface 16 and the contact surface 34. Is converted into stress in directions close to each other. As a result, the contact surface 16 and the contact surface 34 are pressed against each other via the packing 41 to become a watertight state. The force converted at the time of insertion also acts in the direction of separating the contact surface 16 and the contact surface 34, but the guide portion 17 prevents the adapter 30 from separating from the contact surface 16. It is possible to reliably maintain the watertight state.

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

The operation of the joint member 1 in the present embodiment will be described in detail below.

First, when there is no drainage from the upstream side of the joint member 1 and no backflow of fluid or the like is generated from the downstream side, the check valve 50 has its own elasticity and its own weight so that the water stop portion 53 has a valve seat 37. Is in contact with. As a result, the drainage flow path inside the joint member 1 is blocked by the water stop portion 53, and it is possible to prevent backflow of odors, drainage, pests, etc. 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 drainage is performed as shown in FIG. 8A. When the water stop portion 53 is separated from the valve seat 37 by the water pressure of the above, 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 portion 542, the valve body 51 is easily separated from the valve seat 37. Then, when the inflow of drainage from the upstream side is completed, the check valve 50 abuts the water stop portion 53 again over the entire circumference and closes the drainage flow path due to its own elastic force and its own weight. At this time, since the water stop portion 53 is the lower end of the check valve 50 and is arranged at the bottom of the drainage flow path, no water residue is generated upstream of the check valve 50 at the end of drainage.
On the other hand, when a backflow of a fluid or the like occurs from the downstream side of the joint member 1, the backflowed fluid comes into contact with 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 that comes into contact with the water from the downstream side applies stress so as to press the water stop portion 53 toward the valve seat 37, so that the drainage flow path is maintained to be blocked. Ru.

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 placed 360 degrees with respect to the central axis of the horizontal pulling pipe. Even if it is rotated in the direction, the opening / closing end portion 542 of the water stop portion 53 can always be arranged at the lower end of the check valve 50 by adjusting the direction of the check valve 50 inside the storage chamber 13. This makes it 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 make 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 continuous from the air conditioner 100, the inspection port 14 is attached so as to face downward as shown in FIG. , Maintenance is easy. That is, when the joint member 1 is attached to the horizontal pull pipe continuous from the air conditioner 100, the operator removes the inspection lid 110 provided on the ceiling downstairs, and the joint is arranged from below to the ceiling. Perform maintenance of member 1. At this time, since the joint member 1 is attached so that the inspection port 14 faces downward, the lid portion 20 can be easily removed to clean the inside.
Further, as shown in FIG. 11, when the joint member 1 is attached to the drainage pipe continuous from the freezer / refrigerator 200, the inspection port 14 is attached so as to face sideways for maintenance from the side. Becomes easier. That is, when the joint member 1 is attached to the horizontal pulling pipe continuous from the freezer / refrigerator 200, the operator performs maintenance of the joint member 1 from below the freezer / refrigerator 200. At this time, since the joint member 1 is attached so that the inspection port 14 faces sideways, it is possible to clean the inside of the joint member 1 without interfering with the freezer / refrigerator arranged above the joint member 1. Will be.
In addition, since the joint member 1 in each of the above embodiments prevents backflow only by the check valve 50 and does not use water sealing, drainage may be applied to the user when the lid portion 20 is removed. The surrounding area will not be polluted by drainage.

Although the joint member of the present invention is described above, 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, the lid portion 20 and the adapter 30 in each embodiment may be configured as an integral member.
Further, the pipe in which the joint member 1 is arranged is not limited to the one continuous from the air conditioning equipment and the freezer / refrigerator, and may be connected to the continuous pipe from other equipment.

1 Joint member 10 Joint body 11 Inflow port 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 Fixed part 37 Valve seat 38 Groove 39 Packing 40 Packing 41 Packing 50 Check valve 51 Valve body 52 Fixed part 521 Retaining part 53 Water stop part 541 Support part 542 Opening and closing end 55 Casing 57 Flange part 100 Air conditioning equipment 110 lid 200 refrigerator / freezer

Claims (3)

A joint member connected to a horizontal pull pipe,
An inspection port formed on the wall and
The lid that closes the inspection port and
A check valve that is removable from the inspection port and is placed inside the joint member to prevent backflow of fluid ,
It is equipped with an adapter that is inserted into the joint member from the inspection port .
The check valve has a water stop portion that closes the drainage flow path, and even when the joint member is connected to the horizontal pull pipe, the inspection port is oriented in an arbitrary direction. The water stop portion can be arranged at the lower end of the check valve ,
The adapter has a fixing part to which the check valve is attached and
It has a valve seat that comes into contact with the water stop portion, and has a valve seat.
The valve seat is a joint member characterized in that the valve seat protrudes from the fixed portion toward the water stop portion . The joint member is
The check valve has a fixed portion fixed to the adapter and a fixed portion.
The joint member according to claim 1, wherein the joint member is an umbrella valve having an annular water stop portion formed from a downstream end portion of the fixed portion toward the outside in the circumferential direction. The joint member is
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.

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