Water intake faucet

Abstract

To provide a water intake faucet capable of stopping water intake and discharging residual water in the internal flow path by a series of operations performed on one component.SOLUTION: When a valve mechanism 15 of a water intake faucet 1 is shifted from a flow path open state 15B to a flow path closed state 15A, a valve stem 12 is rotated in a closing direction and moved upward X2, thereby moving a main valve body 41 upward X2 to contact a valve seat 40 from below X1. As a result, the valve mechanism 15 becomes the flow path closed state 15A. When the valve mechanism 15 is in the closed state, further rotation of the valve stem 12 in the closing direction causes a valve pressing member 44 to move upward X2 while separating from the main valve body 41 while the main valve body 41 is contacting the valve seat 40, thereby engaging a locking claw 62 to move a drain valve 61 from a closed position 61A to an open position 61B, so that a drain valve mechanism 16 transitions to the drain port open state 16B.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a water intake valve for taking water from a water distribution pipe for irrigation water or the like. [Background technology]

[0002] Such a water intake faucet is described in Patent Document 1. The water intake faucet in Patent Document 1 has a pipe member with a water intake port at its lower end that connects to a water distribution pipe. The pipe member has a bent section at its upper end that bends sideways. The tip of the bent section of the pipe member is a water outlet. The pipe member has an internal flow path that connects the water intake port and the water outlet, and a valve mechanism that opens and closes the internal flow path. The valve mechanism has an annular valve seat inside the pipe member, a valve element for opening and closing the valve seat, and a valve element movement mechanism for raising and lowering the valve element. The valve seat is located in the lower part of the pipe member. The valve element movement mechanism has a valve stem that extends vertically inside the pipe member and a tubular support part that supports the valve stem inside the pipe member. The valve stem has a male thread on its outer surface. The support part has a female thread on its inner surface that threads onto the male thread. The upper end of the valve stem penetrates the ceiling wall of the bent section and protrudes upward from the pipe member. A handle is attached to the upper end of the valve stem. A valve disc is attached to the lower end of the valve stem. When the valve stem is rotated by operating the handle, the valve stem moves up and down. The valve disc moves together with the valve stem, opening and closing the valve seat from above.

[0003] The water intake valve in this document includes a drainage mechanism that drains water remaining above the valve seat in the internal flow path when the valve body abuts against the valve seat to close the internal flow path. The drainage mechanism includes a drain outlet located adjacent to the upper side of the valve seat in the pipe member, a drain pipe attached to the drain outlet and protruding radially outward from the pipe member, an on-off cock attached to the drain pipe, and an operating mechanism that operates the on-off cock. The operating mechanism includes an operating handle and an operating rod that connects the operating handle to the on-off cock. The operating handle is located on the upper side of the pipe member, and the operating rod extends vertically alongside the pipe member. When the operating handle is operated to open the on-off cock, water remaining in the internal flow path flows out through the water distribution pipe. This prevents water remaining in the internal flow path from freezing and damaging the water intake valve in winter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 59-125578 Summary of the Invention [Problem to be solved by the invention]

[0005] In the water intake valve of the same document, when stopping the intake of water from the water distribution pipe and discharging the water remaining in the internal flow path, it is necessary to operate a handle for opening and closing the internal flow path, and then operate an operating handle for opening and closing the drain opening and closing cock.

[0006] In view of the above, an object of the present invention is to provide a water intake valve that can stop water intake and discharge water remaining in the internal flow path by a series of actions that operate a single member. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a valve mechanism for opening and closing the internal flow path, comprising: a pipe section having a water intake at a lower end, a water discharge outlet at an upper portion, and an internal flow path connecting the water intake and the water discharge outlet; a valve stem extending in a vertical direction inside the pipe section and having a male thread on an outer circumferential surface; a cylindrical support section fixed to the inside of the pipe section below the water discharge outlet and having a female thread that screws onto the male thread; a valve mechanism for opening and closing the internal flow path; a drain outlet penetrating the pipe section below the support section in a direction intersecting the vertical direction; and a drain valve mechanism for opening and closing the drain outlet, a main valve body having a through hole penetrating in the vertical direction; a movable valve body that is inserted into the through hole to close the through hole and is movable in the vertical direction relative to the main valve body; a valve body pressing member that moves integrally with the valve stem above the main valve body; and a spring member that connects the main valve body and the movable valve body on the side of the main valve body opposite to the valve seat, wherein the main valve body is capable of abutting against the valve seat from the side of the water intake port. the movable valve body is fixed to the lower end of the valve shaft and moves integrally with the valve shaft; the outer diameter of the valve body holding member is smaller than the inner diameter of the valve seat; the drain valve mechanism includes a drain valve that is movable along the inner wall surface of the pipe portion between an open position that connects the drain port to the internal flow path and a closed position that closes the drain port below the open position; a locking claw that protrudes inward from the drain valve; and a biasing member that biases the drain valve from the open position toward the closed position, When taking water, the valve mechanism is in a flow path open state in which the valve body pressing member abuts against the main valve body from above to separate the main valve body downward from the valve seat, and the drain valve mechanism is in a drain outlet closed state in which the drain valve is located at the closed position to close the drain outlet, and when the valve mechanism is in the flow path open state and the drain valve mechanism is in the drain outlet closed state, if the valve stem is rotated in a predetermined closing direction to move the valve stem upward, the main valve body moves upward together with the valve body pressing member and the movable valve body to the valve seat. When the valve mechanism abuts from below, it transitions to a flow path closed state in which it seals the internal flow path, and when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet closed state, the valve shaft is rotated in the closing direction, the valve body holding member moves upward away from the main valve body while the main valve body abuts against the valve seat, and the valve body holding member engages with the locking claw to move the drain valve from the closed position to the open position, and the drain valve mechanism transitions to a drain outlet open state in which it opens the drain outlet.

[0008] In the water intake faucet of the present invention, when the valve mechanism is transitioned from a flow path open state to a flow path closed state, the valve stem is rotated in the closing direction to move upward. Here, as the valve disc retainer and movable valve disc move upward together with the valve stem, the main valve disc, connected by the spring member, also moves upward together with the movable valve disc. Furthermore, the main valve disc is pressed against the valve seat by the pressure of water flowing into the pipe section from a water distribution pipe or the like through the water intake. This causes the valve mechanism to enter a flow path closed state. Then, when the valve stem is further rotated in the closing direction after the valve mechanism is in the closed state, the valve disc retainer member moves upward away from the main valve disc while the main valve disc is in contact with the valve seat, engaging with the locking claw and moving the drain valve from the closed position to the open position. This causes the drain valve mechanism to enter a drain outlet open state. Therefore, the series of actions of rotating the valve stem in the closing direction can stop water intake and continuously drain water remaining in the internal flow path. In addition, in the valve mechanism, the main valve body abuts against the valve seat from below (upstream side of the valve seat) to close the internal flow path. Therefore, even if the pressure of water flowing into the pipe from the water intake increases after the valve mechanism is in the internal flow path closed state, the main valve body moves away from the valve seat, preventing the water flowing in from the water intake from flowing down the internal flow path toward the water discharge outlet.

[0009] In the present invention, the movable valve element includes a column portion that is inserted into the through hole to close the through hole, and a flange portion that extends radially outward from the lower end of the column portion, and the spring member is a coil spring that is arranged on the outer periphery of the column portion, has its lower end connected to the flange portion, and its upper side connected to the valve body, and exerts a biasing force that biases the valve body against the valve seat when the valve mechanism is in the flow path closed state. In this way, when the valve mechanism transitions to the flow path closed state, the biasing force of the spring member can be used to easily press the main valve element against the valve seat.

[0010] In the present invention, the lower surface of the valve disc holding member may be positioned on the same plane as the upper surface of the movable valve disc, perpendicular to the valve stem. In this way, when the valve mechanism is shifted from the internal flow path closed state to the internal flow path open state, the main valve disc and the movable valve disc can be raised and lowered integrally with the valve stem.

[0011] In the present invention, when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain port open state, rotating the valve stem in the opening direction opposite to the closing direction to move the valve stem downward causes the drain valve to move to the closed position by the biasing force of the biasing member as the valve body holding member moves downward, and the drain valve mechanism can transition to a drain port closed state in which the drain valve is arranged in the closed position. In other words, when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain port open state, rotating the valve stem in the opening direction can bring the valve mechanism into the flow path closed state and the drain valve mechanism into the drain port open state.

[0012] In the present invention, when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet open state, rotating the valve stem in the opening direction opposite to the closing direction to move the valve stem downward causes the drain valve to move to the closed position due to the biasing force of the biasing member as the valve disc retainer member moves downward, and the drain valve mechanism transitions to a drain outlet closed state in which the drain valve is in the closed position. This allows water to be drawn in. Furthermore, when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet open state, rotating the valve stem in the opening direction to move the valve stem downward transitions the drain valve mechanism to a drain outlet closed state in which the drain valve is in the closed position. Furthermore, when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet closed state, rotating the valve stem in the opening direction to move the valve stem downward transitions the valve mechanism to a flow path open state. Therefore, when the valve mechanism is in a flow path closed state and the drain valve mechanism is in a drain outlet open state, by continuing to rotate the valve shaft in the opening direction, the valve mechanism can be transitioned to a flow path open state and the drain valve mechanism can be transitioned to a drain outlet closed state, allowing water to be taken in.

[0013] In the present invention, the drain valve mechanism comprises a bolt member having a shaft and a head provided at the upper end of the shaft and having an outer diameter dimension larger than that of the shaft, the locking claw has an opening through which the shaft passes in the vertical direction, the inner diameter dimension of the opening is smaller than the outer diameter dimension of the head, the lower end portion of the shaft of the bolt member is fixed to the valve body holding member, and when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet open state, rotating the valve shaft in the opening direction to move the valve shaft downward causes the valve body holding member to abut against the main valve body from above and separate the main valve body downward from the valve seat, causing the valve mechanism to transition to the flow path open state, and the head abuts against the locking claw from above and moves the drain valve toward the closed position as the valve body holding member moves downward, causing the drain valve mechanism to transition to the drain outlet closed state. In this way, after the valve mechanism is in a flow path closed state and the drain valve mechanism is in a drain outlet open state, the valve shaft can be rotated in the opening direction to transition the valve mechanism to a flow path open state and the drain valve mechanism to a drain outlet closed state, allowing water to be taken in.

[0014] In the present invention, the main valve element may include an elastic member that can contact the valve seat from the side of the water intake, the valve seat including a valve seat surface perpendicular to the axis of the valve stem and an annular protrusion protruding from the valve seat surface, and when the main valve element contacts the valve seat, the elastic member elastically deforms to contact the annular protrusion and the valve seat surface. This ensures that the internal flow path is sealed by the main valve element contacting the valve seat. Furthermore, if the valve seat surface against which the main valve element contacts is perpendicular to the axis of the valve stem, this prevents or suppresses the main valve element from becoming trapped in the central hole of the annular valve seat even when the main valve element is pushed by water flowing in from the water intake.

[0015] In the present invention, the main valve element may have a lower portion that is tapered downward when viewed from a direction perpendicular to the axis of the valve stem, so that the outer diameter dimension decreases downward. In this way, when the main valve element is moved away from the valve seat toward the water intake side to open the internal flow path, the main valve element moves away from the water intake side toward the valve seat due to the pressure of water flowing from the water intake side toward the valve seat. This can prevent the user from having difficulty moving to the other side. [Effects of the Invention]

[0016] In the water intake tap of the present invention, a series of operations for rotating the valve stem in the closing direction can stop water intake and continuously discharge water remaining in the internal flow path. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a side view of a water intake valve to which the present invention is applied. [Figure 2] FIG. [Figure 3] This is a cross-sectional view of the water intake valve with the pipe section extended. [Figure 4] FIG. 4 is a partial cross-sectional view of the lower end portion of the pipe portion. [Figure 5] FIG. 2 is an exploded perspective view of the lower end portion of the water intake faucet as viewed from above. [Figure 6] This is an exploded perspective view of the lower end portion of the water intake faucet as viewed from below. [Figure 7] FIG. 10 is an explanatory diagram illustrating the state of the water intake valve when water is being taken in. [Figure 8] FIG. 10 is an explanatory diagram of a water intake faucet with the valve mechanism in a closed state and the drain valve mechanism in an open state. [Figure 9] 10 is an explanatory diagram of the water intake valve when the biasing member that biases the drain valve is broken. FIG. [Figure 10] 10A and 10B are explanatory diagrams illustrating the operation of the drain valve mechanism to move the drain valve when the biasing member is broken. [Figure 11] FIG. 10 is a cross-sectional view of the water intake valve of Example 2. [Figure 12] FIG. 10 is a partial cross-sectional view of the lower end portion of the pipe portion of the water intake tap of Example 2. [Figure 13] FIG. 10 is an exploded perspective view of the lower end portion of the water intake faucet of Example 2 as viewed from above. [Figure 14] FIG. 10 is an exploded perspective view of the lower end portion of the water intake faucet of Example 2 as viewed from below. [Figure 15] FIG. 10 is a partially enlarged cross-sectional view of the lower end portion of the pipe portion of the water intake tap of Example 2. [Figure 16] FIG. 10 is an explanatory diagram illustrating the state of the water intake valve of Example 2 when taking in water. [Figure 17] FIG. 10 is an explanatory diagram of the water intake faucet of Example 2, with the valve mechanism in a flow path closed state and the drain valve mechanism in a drain outlet open state. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, a water intake valve according to an embodiment of the present invention will be described with reference to the drawings.

[0019] Example 1 Fig. 1 is a side view of a water intake faucet to which the present invention is applied. Fig. 2 is a cross-sectional view of the water intake faucet. Fig. 3 is a cross-sectional view of the water intake faucet with the pipe section extended. Fig. 4 is a partial cross-sectional view of the lower end portion of the pipe section. Fig. 5 is an exploded perspective view of the lower end portion of the water intake faucet as viewed from above. Fig. 6 is an exploded perspective view of the lower end portion of the water intake faucet as viewed from below.

[0020] As shown in Figures 1 and 2, the water intake faucet 1 has a pipe section 4 with a water intake port 2 at its lower end. The pipe section 4 has a bent section 3 at its upper end that bends sideways. The tip of the bent section 3 in the pipe section 4 is a water discharge port 5. A handle 6 is rotatably attached to the ceiling of the bent section. The pipe section 4 also has a drain port 7 that penetrates sideways at its lower section. As shown in Figure 2, a water distribution pipe 9 that supplies irrigation water, etc., is connected to the water intake faucet 2. Here, the water distribution pipe 9 is buried underground, so the water intake faucet 1 is installed with its lower section buried underground.

[0021] An internal flow path 11 that connects the water intake 2 and the water discharge 5 is provided inside the pipe section 4. The water discharge port 7 is connected to the internal flow path 11. Inside the pipe section 4, a valve stem 12 extends in the vertical direction X. That is, the axis L of the valve stem 12 extends in the vertical direction X. The valve stem 12 is supported at its lower end portion by a cylindrical support section 13 fixed to the inside of the pipe section 4. The upper end of the valve stem 12 is connected to the handle 6. As shown in FIG. 4, the valve stem 12 has a male thread 12a on the outer peripheral surface of the lower end portion. The support section 13 has a female thread 13a on its inner peripheral surface that screws into the male thread 12a. Therefore, when the valve stem 12 is rotated by operating the handle 6, the valve stem 12 is rotated by the support section 13. The support portion 13 moves in the vertical direction X. A valve mechanism 15 for opening and closing the internal flow path 11 and a drain valve mechanism 16 for opening and closing the drain port 7 are provided below the support portion 13 at X1.

[0022] 2 and 4, the water intake 2, support portion 13, valve mechanism 15, and drain valve mechanism 16 are provided at the lower end portion of the pipe section 4. As shown in FIG. 4, the lower end portion of the pipe section 4 comprises, from downward X1 to upward X2, a first pipe member 19 having the water intake 2, and a second pipe member 20 having a valve seat 40 of the valve mechanism 15 and a drain port 7 of the drain valve mechanism 16. Also, as shown in FIG. 2, the bent portion 3 at the upper end portion of the pipe section 4 is formed by an elbow member 21. As shown in FIG. 2, the portion of the pipe section 4 between the second pipe member 20 and the elbow member 21 is formed by a large-diameter pipe member 22 whose lower end is connected to the second pipe member 20, and a small-diameter pipe member 23 whose upper end is inserted inside the large-diameter pipe member 22 and connected to the elbow member 21. Therefore, as shown in FIG. 3, by pulling up the elbow member 21 upward X2, the small diameter pipe member 23 moves upward X2 inside the large diameter pipe member 22, and the pipe portion 4 extends.

[0023] 2, the valve stem 12 includes, from downward X1 to upward X2, a valve stem main body 25 supported by the support portion 13, an outer square tube member 26 connected to the valve stem main body 25 so as not to rotate relative to the valve stem main body 25, and an inner square tube member 27 inserted inside the outer square tube member 26 and having its upper end connected to the handle 6 inside the elbow member 21. Therefore, as shown in FIG. 3, when the elbow member 21 is pulled upward X2 to extend the pipe portion 4, the valve stem 12 also extends in accordance with the extension of the pipe portion 4.

[0024] As shown in FIGS. 4, 5, and 6, the support portion 13 is provided on a valve stem guide 31 fixed to the inner circumferential side of the second tubular member 20. The valve stem guide 31 is cylindrical and includes, from the lower portion X1 to the upper portion X2, a small-diameter cylindrical portion 32 and a large-diameter cylindrical portion 33 having larger inner and outer diameters than the small-diameter cylindrical portion 32. A male thread is provided on the outer circumferential surface of the large-diameter cylindrical portion 33. The valve stem guide 31 also includes a support portion 13 provided on the inner circumferential side of the small-diameter cylindrical portion 32 and a plurality of connecting portions 34 that protrude inward from multiple locations on the inner circumferential surface of the small-diameter cylindrical portion 32 and connect the small-diameter cylindrical portion 32 and the support portion 13. Here, as shown in FIGS. 4 and 5, the second tubular member 20 has, at its upper end portion, an annular step portion 20a with an annular end face facing upward X2. A female thread is provided on the inner circumferential surface of the second tubular member 20 above the annular step portion 20a, X2. The stem guide 31 is fixed to the second pipe member 20 by screwing a male screw provided on the outer circumferential surface of the large diameter cylindrical portion 33 into a female screw provided on the inner circumferential surface of the second pipe member 20. When the stem guide 31 is fixed to the second pipe member 20, a step 35 formed between the small diameter cylindrical portion 32 and the large diameter cylindrical portion 33 on the outer circumferential surface of the stem guide 31 comes into contact with the annular step 20a.

[0025] As shown in Figure 4, the valve mechanism 15 includes an annular valve seat 40 provided below the drain outlet 7 at X1, a main valve element 41 having a through-hole 41a extending in the vertical direction X, a movable valve element 42 inserted into the through-hole 41a to close the through-hole 41a, and a spring member 43 connecting the main valve element 41 and the movable valve element 42 on the side of the main valve element 41 opposite the valve seat 40. While inserted into the through-hole 41a, the movable valve element 42 is movable relative to the main valve element 41 in the vertical direction X. The spring member 43 is a coil spring. The valve mechanism 15 also includes a valve element holding member 44 that moves integrally with the valve stem 12.

[0026] As shown in Figures 4, 5 and 6, in more detail, the second pipe member 20 has an annular protrusion 37 at its lower end portion that protrudes inward. The inner peripheral end of the annular protrusion 37 has an annular inner peripheral surface extending in the vertical direction X and a tapered inner peripheral surface that slopes outward from the annular inner peripheral surface downward toward X1. The tapered inner peripheral surface is a valve seat 40 against which the valve body can abut from below X1. The main valve element 41 has a valve body 45 and a sheet packing 46 attached to the upper surface of the valve body 45. The valve body 45 has an annular flat plate portion 47 with a through-hole 41a at its center, an annular tapered plate portion 48 that slopes downward toward X1 from the outer peripheral end of the flat plate portion 47 toward the outer peripheral side, and a tapered plate portion 48. The main valve element 41 comprises an annular plate portion 49 extending radially outward from the outer peripheral end of the tapered plate portion 48, and a cylindrical portion 50 extending downward X1 from the lower surface of the flat plate portion 47, surrounding the through hole 41a. The outer diameter of the flat plate portion 47 is smaller than the inner diameter of the valve seat 40. The sheet packing 46 is attached to the upper surfaces of the flat plate portion 47, tapered plate portion 48, and annular plate portion 49 of the main valve element 41. The sheet packing 46 has an opening 46a that forms part of the through hole 41a in the portion attached to the flat plate portion 47. The movable valve element 42 is inserted into the through hole 41a and passes through the flat plate portion 47 and the sheet packing 46.

[0027] 4 shows the valve mechanism 15 in a flow path closed state 15A in which the internal flow path 11 is closed. Also, the state shown in FIG. 4 shows the drain valve mechanism 16 in a drain port closed state 16A in which the drain port 7 is closed. As shown in FIG. 4, the tapered plate portion 48 of the main valve element 41 abuts against the valve seat 40 via the sheet packing 46. When the main valve element 41 abuts against the valve seat 40, the flat plate portion 47 is positioned on the inner circumferential side of the annular protrusion 37, and the upper end surface of the main valve element 41 (the portion of the sheet packing 46 attached to the flat plate portion 47) is positioned at a position X2 above the valve seat 40. Also, when the main valve element 41 abuts against the valve seat 40, the upper end surface of the main valve element 41 (the portion of the sheet packing 46 attached to the flat plate portion 47) is at the same height as the upper surface of the annular protrusion 37.

[0028] The movable valve element 42 includes a column portion 51 that is inserted into the through-hole 41a to close the through-hole 41a, a flange portion 52 that extends radially outward from the lower end of the column portion 51, and a connecting shaft portion 53 that has a smaller diameter than the column portion 51 and protrudes upward X2 from the center of the column portion 51. The spring member 43 (coil spring) is disposed on the outer periphery of the column portion 51. The lower end of the spring member 43 is connected to the flange portion 52, and the upper end of the spring member 43 is connected to the valve body 45. When the movable valve element 42 moves relative to the valve body 45, the outer periphery of the flange portion 52 of the movable valve element 42 comes into sliding contact with the tubular portion 50 of the valve body 45.

[0029] As shown in Figures 5 and 6, the valve disc holding member 44 is annular. The valve disc holding member 44 is attached to the valve stem 12 in a state where it is sandwiched in the vertical direction X between the movable valve disc 42 and an annular connecting member 54 attached to the lower end of the valve stem main body 25. That is, a recess 25a is provided on the lower end surface of the valve stem main body 25. The connecting member 54 has, from the lower side X1 to the upper side X2, a small diameter portion 54a and a large diameter portion 54b whose outer diameter is larger than that of the small diameter portion 54a. The central hole 44a of the valve disc holding member 44 is larger than the outer diameter of the small diameter portion 54a and smaller than the outer diameter of the large diameter portion 54b.

[0030] The small-diameter portion 54a of the connecting member 54 is inserted into the central hole 44a of the valve disc holding member 44 from above X2. In this state, the connecting shaft portion 53 of the movable valve disc 42 is inserted into the central hole 44a of the connecting member 54 from below. The connecting shaft portion 53 of the movable valve disc 42 also penetrates the connecting member 54 and is inserted into the recess 25a of the valve stem main body 25. As a result, the movable valve disc 42 is fixed to the valve stem main body 25. Here, the outer diameter of the column portion 51 of the movable valve disc 42 is larger than the inner diameter of the central hole 44a of the valve disc holding member 44. Therefore, the opening edge portion of the central hole 44a of the valve disc holding member 44 is sandwiched between the large-diameter portion 54b of the connecting member and the upper surface of the movable valve disc 42 (the upper surface of the column portion 51). As a result, the valve disc holding member 44 moves in the vertical direction X together with the valve stem 12 and the movable valve disc 42. The valve disc holding member 44 extends perpendicular to the valve shaft 12. The outer diameter of the valve disc holding member 44 is smaller than the inner diameter of the valve seat 40. The lower surface of the valve disc holding member 44 is located on the same plane as the upper surface of the movable valve disc 42.

[0031] As shown in FIG. 4, the drain valve mechanism 16 has a drain valve 61 for opening and closing the drain port 7, a locking claw 62 protruding inward from the drain valve 61, and a biasing member 63. As shown in FIGS. 5 and 6, the drain valve 61 has a cylindrical shape. The drain valve 61 is movable along the inner wall surface of the pipe portion 4 (second pipe member 20) between a closed position 61A that closes the drain port 7 and an open position 61B (see FIG. 8 described later) that communicates with the internal flow path 11. The closed position 61A is located below the open position 61B. 4, when the drain valve 61 is in the closed position 61A, the lower end of the drain valve 61 abuts against the annular protrusion 37 of the second pipe member 20.

[0032] The locking claws 62 protrude inward from three circumferential positions of the cylindrical drain valve 61. In this example, the locking claws 62 are provided at equal angular intervals. The biasing member 63 is a coil spring arranged between the large-diameter cylindrical portion 33 of the valve stem guide 31 and the drain valve 61. The coil spring is located on the outer circumferential side of the small-diameter cylindrical portion 32. The upper end of the biasing member 63 abuts against the large-diameter cylindrical portion 33 of the valve stem guide 31, and the lower end abuts against the drain valve 61. Here, the biasing member 63 biases the drain valve 61 from the open position 61B side toward the closed position 61A. In other words, the biasing member 63 biases the drain valve 61 from above X2 toward the annular protrusion 37 of the second pipe member 20.

[0033] The drain valve mechanism 16 also includes bolt members 65, the number of which corresponds to the number of locking claws 62. The bolt member 65 includes a shaft portion 65a and a head portion 65b that is provided at the upper end of the shaft portion 65a and has an outer diameter larger than that of the shaft portion 65a. The drain valve mechanism 16 also includes an opening 66 in the locking claw 62, through which the shaft portion 65a passes in the up-down direction X. The shaft portion 65a of the bolt member 65 passes through the opening 66. The inner diameter of the opening 66 is smaller than the outer diameter of the head portion 65b. The lower end portion of the shaft portion 65a of the bolt member 65 is fixed to the valve disc holding member 44.

[0034] (Operation of water intake valve) Figure 7 is an explanatory diagram illustrating the state of the water intake tap 1 when taking in water. Figure 8 is an explanatory diagram of the water intake tap 1 when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B. Figure 9 is an explanatory diagram of the water intake tap 1 when the biasing member 63 that biases the drain valve 61 is damaged. Figure 10 is an explanatory diagram of the operation of the drain valve mechanism 16 to move the drain valve 61 when the biasing member 63 is damaged.

[0035] As shown in Figure 7, when water is taken in, the valve mechanism 15 has the valve disc holding member 44 abut against the main valve disc 41 from above X2, moving the main valve disc 41 downward X1 from the valve seat 40. That is, when water is taken in, the valve mechanism 15 is in a flow path open state 15B in which the internal flow path 11 is open. Also, when water is taken in, the drain valve mechanism 16 is in a drain outlet closed state 16A in which the drain valve 61 is in a closed position 61A in which the drain outlet 7 is closed. As a result, water in the distribution pipe 9 flows into the pipe section 4 through the water intake 2, passes through the internal flow path 11, and is released from the water discharge outlet 5, as shown by the white arrow.

[0036] When the valve stem 12 is rotated in a predetermined closing direction from the state shown in FIG. 7 (the valve mechanism 15 is in the flow path open state 15B and the drain valve mechanism 16 is in the drain port closed state 16A) to move the valve stem 12 upward X2, the main valve element 41 moves upward X2 together with the valve element holding member 44 and the movable valve element 42 and abuts against the valve seat 40 from below X1. This causes the valve mechanism 15 to transition to a flow path closed state 15A in which the internal flow path 11 is blocked, as shown in FIG. 4. When the valve mechanism 15 is in the flow path closed state 15A, the spring member 43 exerts a biasing force that biases the valve body 45 against the valve seat 40.

[0037] When the valve shaft 12 is further rotated in the closing direction from this state (when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port closed state 16A), as shown in FIG. 8, the valve body holding member 44 moves upward X2 away from the main valve body 41 while the main valve body 41 abuts against the valve seat 40. Furthermore, the valve body holding member 44 moving upward X2 engages with the locking claw 62 from the downward X1, moving the drain valve 61 to the open position 61B. This causes the drain valve mechanism 16 to transition to the drain port open state 16B, which opens the drain port 7. When the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, water that has accumulated in the internal flow path 11 above the valve seat 40 at X2 is discharged from the drain port 7, as shown by the white arrow in FIG. 8.

[0038] Next, in the state shown in FIG. 8 (the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain outlet When the valve stem 12 is rotated from the open state 16B in the opening direction opposite to the closing direction to move the valve stem 12 downward X1, the valve disc holding member 44 moves downward X1, and the drain valve 61 moves to the closed position 61A by the biasing force of the biasing member 63. As a result, the drain valve mechanism 16 transitions to the drain port closed state 16A in which the drain valve 61 is arranged in the closed position 61A, as shown in Figure 4. That is, the water intake tap 1 has the valve mechanism 15 in the flow path closed state 15A and the drain valve mechanism 16 in the drain port closed state 16A.

[0039] Furthermore, when the valve stem 12 is rotated in the opening direction from the state shown in Figure 4 (valve mechanism 15 in flow path closed state 15A and drain valve mechanism 16 in drain port closed state 16A) to move said valve stem 12 downward X1, the valve body holding member 44 moves downward X1 and abuts against the main valve body 41 from above X2, separating said main valve body 41 downward X1 from the valve seat 40. As a result, as shown in Figure 7, the valve mechanism 15 of the water intake tap 1 transitions to the flow path open state 15B. In other words, the water intake tap 1 has the drain valve mechanism 16 in the drain port closed state 16A and the valve mechanism 15 in the flow path open state 15B, making it possible to take water.

[0040] Here, as shown by an x ​​in Figure 9, if the biasing member 63 that biases the drain valve 61 to the closed position 61A is damaged, the drain valve 61 will not move from the open position 61B to the closed position 61A when the valve stem 12 is rotated in the opening direction from the state shown in Figure 8 (valve mechanism 15 in the flow path closed state 15A and drain valve mechanism 16 in the drain port open state 16B). Therefore, as shown in Figure 9, the valve disc holding member 44 and the movable valve disc 42 move downward X1 together with the valve stem 12, but the drain valve 61 remains in the open position 61B. In this state, the valve mechanism 15 of the water intake tap 1 remains in the flow path closed state 15A and the drain valve mechanism 16 in the drain port open state 16B.

[0041] In this case, by further rotating the valve stem 12 in the opening direction, water intake by the water intake tap 1 becomes possible. That is, when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, rotating the valve stem 12 in the opening direction to move the valve stem 12 downward X1 causes the valve disc holder 44 to move downward X1, as shown in Fig. 10. As a result, the valve disc holder 44 abuts against the main valve disc 41 from above X2, separating the main valve disc 41 downward X1 from the valve seat 40, and the bolt member 65 moves downward X1 together with the valve disc holder member 44, so that the head 65b abuts against the locking claw 62 from above X2. Thereafter, as the bolt member 65 moves downward X1 together with the valve disc holder member 44, the drain valve 61 moves downward X1 to reach the closed position 61A. As a result, the water intake tap 1 transitions from the drain valve mechanism 16 to the drain port open state 16B, and from the drain valve mechanism 16 to the drain port closed state 16A. In other words, the water intake tap 1 is in the state shown in Figure 7 (the valve mechanism 15 is in the flow path open state 15B, and the drain valve mechanism 16 is in the drain port closed state 16A). Therefore, the water intake tap 1 becomes available for drawing water.

[0042] (Action and effect) In the water intake faucet 1 of this example, when the valve mechanism 15 is transitioned from the flow path open state 15B to the flow path closed state 15A, the valve stem 12 is rotated in a predetermined closing direction to move the valve stem 12 upward to X2. Here, when the valve disc holding member 44 and the movable valve disc 42 move upward to X2 together with the valve stem 12, the main valve disc 41 moves upward to X2 together with the movable valve disc 42 connected by the spring member 43. Furthermore, the main valve disc 41 moves upward to X2 due to the pressure of water flowing into the pipe section 4 from the water distribution pipe 9 or the like through the water intake 2, and is pressed against the valve seat 40 to an abutting position. This causes the valve mechanism 15 to enter the flow path closed state 15A. Then, when the valve stem 12 is further rotated in the closing direction after the valve mechanism 15 has reached the closed state, the valve body pressing member 44 moves upward X2 away from the main valve body 41 while the main valve body 41 is in contact with the valve seat 40, and engages with the locking claw 62, moving the drain valve 61 from the closed position 61A to the open position 61B. This causes the drain valve mechanism 16 to transition to the drain port open state 16B. Therefore, by performing a series of operations that rotate the valve stem 12 in the closing direction, it is possible to stop water intake and continuously discharge water remaining in the internal flow path 11.

[0043] Furthermore, in the valve mechanism 15, the main valve element 41 abuts against the valve seat 40 from below (the upstream side of) the valve seat 40 to close the internal flow path 11. Therefore, even if the pressure of the water flowing into the pipe section 4 from the water intake 2 increases after the valve mechanism 15 is set to the flow path closed state 15A, the main valve element 41 moves away from the valve seat 40, preventing the water flowing in from the water intake 2 from flowing through the internal flow path 11 toward the water discharge outlet 5.

[0044] In this example, when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, if the valve stem 12 is rotated in the opening direction opposite to the closing direction to move the valve stem 12 downward X1, the drain valve 61 moves to the closed position 61A by the biasing force of the biasing member 63 as the valve body holding member 44 moves downward X1, and the drain valve mechanism 16 transitions to the drain port closed state 16A in which the drain valve 61 is arranged in the closed position 61A. In other words, when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, the valve mechanism 15 can be placed in the flow path closed state 15A and the drain valve mechanism 16 in the drain port closed state 16A by rotating the valve stem 12 in the opening direction.

[0045] In this example, when the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port closed state 16A, rotating the valve stem 12 in the opening direction to move the valve stem 12 downward X1 causes the valve disc holding member 44 to move downward X1 and come into contact with the main valve disc 41 from above X2, separating the main valve disc 41 downward X1 from the valve seat 40, and the valve mechanism 15 transitions to the flow path open state 15B. Therefore, water can be taken in.

[0046] Furthermore, in this example, when the valve mechanism 15 is in the flow path closing state 15A and the drain valve mechanism 16 is in the drain port opening state 16B, rotating the valve stem 12 in the opening direction to move the valve stem 12 downward X1 causes the drain valve mechanism 16 to transition to the drain port closing state 16A in which the drain valve 61 is positioned in the closed position 61A. Furthermore, when the valve mechanism 15 is in the flow path closing state 15A and the drain valve mechanism 16 is in the drain port closing state 16A, rotating the valve stem 12 in the opening direction to move the valve stem 12 downward X1 causes the valve mechanism 15 to transition to the flow path open state 15B. Therefore, when the valve mechanism 15 is in the flow path closing state 15A and the drain valve mechanism 16 is in the drain port opening state 16B, continuing to rotate the valve stem 12 in the opening direction transitions the valve mechanism 15 to the flow path open state 15B and the drain valve mechanism 16 to the drain port closing state 16A, allowing water to be taken in.

[0047] In this example, the drain valve mechanism 16 includes a bolt member 65 having a shaft portion 65a and a head portion 65b provided at the upper end of the shaft portion 65a and having an outer diameter larger than that of the shaft portion 65a. The locking claw 62 includes an opening 66 through which the shaft portion 65a passes in the up-down direction X. The inner diameter of the opening 66 is smaller than the outer diameter of the head portion 65b. The bolt member 65 has a lower end portion of the shaft portion 65a fixed to the valve disc holding member 44. When the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, if the valve stem 12 is rotated in the opening direction to move the valve stem 12 downward X1, the valve disc holding member 44 moves downward X1 and abuts against the main valve disc 41 from above X2, separating the main valve disc 41 downward X1 from the valve seat 40, and the valve mechanism 15 transitions to the flow path open state 15B. Furthermore, when the valve disc holding member 44 moves downward X1, the head 65b abuts against the locking claw 62 from above X2, moving the drain valve 61 toward the closed position 61A. This causes the drain valve mechanism 16 to transition to the drain outlet closed state 16A. Therefore, by rotating the valve stem 12 in the opening direction, the valve mechanism 15 of the water intake tap 1 is set to the flow path closed state 15A and the drain valve mechanism 16 is set to the drain outlet open state 16B, and then by further rotating the valve stem 12 in the opening direction, the valve mechanism 15 is transitioned to the flow path open state 15B and the drain valve mechanism 16 is transitioned to the drain outlet closed state 16A, allowing water to be taken in.

[0048] In this example, the movable valve body 42 includes a column portion 51 inserted into the through-hole 41a and a flange portion 52 extending radially outward from the lower end of the column portion 51. The spring member 43 is a coil spring. The spring member 43 is disposed on the outer periphery of the column portion 51, with its lower end connected to the flange portion 52 and its upper side connected to the valve body 45. When the valve mechanism 15 is in the flow path closed state 15A, the spring member 43 exerts a biasing force that biases the valve body 45 against the valve seat 40. In this way, when the valve mechanism 15 transitions to the flow path closed state 15A, the biasing force of the spring member 43 can be used to easily press the main valve element 41 against the valve seat 40.

[0049] In this example, the lower surface of the valve disc holding member 44 is located on the same plane as the upper surface of the movable valve disc 42, perpendicular to the valve shaft 12. Therefore, when the valve mechanism 15 is shifted from a state in which the internal flow path 11 is closed to a state in which the internal flow path 11 is opened, the main valve disc 41 and the movable valve disc 42 can be raised and lowered together with the valve shaft 12.

[0050] Example 2 Next, a water intake faucet of Example 2 will be described. Figure 11 is a cross-sectional view of the water intake faucet of this example. Figure 12 is a partial cross-sectional view of the lower end portion of the pipe section. Figure 13 is an exploded perspective view of the lower end portion of the water intake faucet as viewed from above. Figure 14 is an exploded perspective view of the lower end portion of the water intake faucet as viewed from below. Figure 15 is a partially enlarged cross-sectional view of the lower end portion of the pipe section. The water intake faucet of this example has the same appearance as the water intake faucet shown in Figure 1. The water intake faucet 1A of this example has configuration corresponding to the water intake faucet 1 described above. Therefore, the same symbols are used for corresponding configurations.

[0051] The main differences between the water inlet faucet 1A of this example and the water inlet faucet 1 described above are as follows. As shown in Figure 11, in the water inlet faucet 1A of this example, the valve stem main body 25 and the movable valve element 42, which are separate components in the water inlet faucet 1, are combined into a single composite member 70. The composite member 70 is a rod-shaped member that, from the bottom X1 to the top X2, comprises a movable valve element portion 42 and a valve stem main body portion 25. The movable valve element portion 42 is the movable valve element 42 in the water inlet faucet 1, and the valve stem main body portion 25 is the valve stem main body 25 in the water inlet faucet 1. The valve element holding member 44 is composed of two members (a first holding member 71 and a second holding member 72). Furthermore, the water inlet faucet 1A of this example differs from the water inlet faucet 1 in the shape of the valve seat 40 and the shape of the main valve element 41. The water inlet faucet 1A of this example does not have a bolt member 65.

[0052] As shown in Figure 11, the water intake faucet 1A has a pipe section 4 with an intake port 2 at its lower end. The pipe section 4 has a bent section 3 at its upper end that bends laterally. The tip of the bent section 3 in the pipe section 4 is a discharge port 5. A handle 6 is rotatably attached to the ceiling of the bent section. The pipe section 4 also has a drain port 7 that penetrates laterally at its lower section. A distribution pipe 9 that supplies irrigation water, etc., is connected to the intake port 2. An internal flow path 11 that connects the intake port 2 and the discharge port 5 is provided inside the pipe section 4. The drain port 7 communicates with the internal flow path 11. Inside the pipe section 4, a valve shaft 12 extends in the vertical direction X. That is, the axis L of the valve shaft 12 extends in the vertical direction X. Also provided inside the pipe section 4 are a valve mechanism 15 that opens and closes the internal flow path 11 and a drain valve mechanism 16 that opens and closes the drain port 7.

[0053] As shown in FIG. 12, the lower end portion of the pipe section 4 comprises, from downward X1 to upward X2, a first pipe member 19 having a water intake port 2 and a second pipe member 20 having a valve seat 40 of the valve mechanism 15 and a drain port 7 of the drain valve mechanism 16. Also, as shown in FIG. 11, the bent portion 3 at the upper end portion of the pipe section 4 is formed by an elbow member 21. Between the second pipe member 20 and the elbow member 21 in the pipe section 4, a large-diameter pipe member 22 whose lower end is connected to the second pipe member 20 and a small-diameter pipe member 23 whose upper end is inserted inside the large-diameter pipe member 22 and connected to the elbow member 21 are formed. Therefore, by lifting the elbow member 21 upward X2, the small-diameter pipe member 23 moves upward X2 inside the large-diameter pipe member 22, thereby extending the pipe section 4. The extended state of the pipe section 4 is the same as that shown in FIG. 3.

[0054] The valve stem 12 includes, from the lower side X1 to the upper side X2, a valve stem main body portion 25 of the composite member 70, The valve stem 12 includes an outer square tube member 26 and an inner square tube member 27 that is inserted into the outer square tube member 26 and has its upper end connected to the handle 6 inside the elbow member 21. The upper end portion of the valve stem main body portion 25 is connected to the lower end portion of the outer square tube member 26 by a connecting member 73. The valve stem main body portion 25 (composite member 70) and the outer square tube member 26 are connected in a state that prevents them from rotating relative to each other. When the elbow member 21 is pulled upward X2 and the pipe portion 4 is extended, the valve stem 12 extends in accordance with the extension of the pipe portion 4.

[0055] The valve stem 12 has a valve stem main body 25 supported by a cylindrical support 13 provided at the lower end of the tube 4. The valve stem main body 25 has a male thread 12a on its outer circumferential surface. The support 13 has a female thread 13a on its inner circumferential surface that screws onto the male thread 12a. Therefore, when the valve stem 12 is rotated by operating the handle 6, the valve stem 12 moves in the vertical direction X relative to the support 13.

[0056] As shown in FIGS. 12, 13, and 14, the support portion 13 is provided on a valve stem guide 31 fixed to the inner peripheral side of the second tubular member 20. The valve stem guide 31 is cylindrical and includes, from the lower side X1 to the upper side X2, a small-diameter cylindrical portion 32 and a large-diameter cylindrical portion 33 having larger inner and outer diameters than the small-diameter cylindrical portion 32. A male thread is provided on the outer peripheral surface of the large-diameter cylindrical portion 33. The valve stem guide 31 also includes a support portion 13 provided on the inner peripheral side of the small-diameter cylindrical portion 32, and a plurality of connection portions 34 protruding inward from a plurality of locations on the inner peripheral surface of the small-diameter cylindrical portion 32 to connect the small-diameter cylindrical portion 32 and the support portion 13. Here, as shown in FIGS. 12 and 13, the second tubular member 20 has, at its upper end portion, an annular step portion 20a having an annular end face facing upward X2. An internal thread is provided on the inner circumferential surface of the second pipe member 20 above the annular step portion 20a at a position X2.

[0057] The stem guide 31 is fixed to the second pipe member 20 by screwing a male screw provided on the outer peripheral surface of the large diameter cylindrical portion 33 into a female screw provided on the inner peripheral surface of the second pipe member 20. When the stem guide 31 is fixed to the second pipe member 20, a step 35 formed between the small diameter cylindrical portion 32 and the large diameter cylindrical portion 33 on the outer peripheral surface of the stem guide 31 abuts against the annular step 20a. The support portion 13 is located at a position X2 above the water intake 2, the valve mechanism 15, the discharge port 7, and the discharge valve mechanism 16.

[0058] As shown in FIG. 12 , the valve mechanism 15 includes an annular valve seat 40 provided below the drain outlet 7 at X1, a main valve element 41 having a through-hole 41a extending in the vertical direction X, a movable valve element portion 42 inserted into the through-hole 41a to close the through-hole 41a, and a spring member 43. The movable valve element portion 42 is a lower portion of the composite member 70. While inserted into the through-hole 41a, the movable valve element portion 42 is movable relative to the main valve element 41 in the vertical direction X. The spring member 43 is a coil spring. The spring member 43 connects the main valve element 41 and the movable valve element portion 42 on the side of the main valve element 41 opposite the valve seat 40. The valve mechanism 15 also includes a valve element holding member 44 that moves integrally with the valve stem 12.

[0059] 12 and 14, the second pipe member 20 has an annular protrusion 37 at its lower end portion that protrudes inward. As shown in FIG. 15, an annular end face 37a of the annular protrusion 37 facing downward X1 is the valve seat surface 40a of the valve seat 40 and is perpendicular to the axis L. An annular protrusion 40b that protrudes downward X1 is provided at the end portion on the inner periphery of the valve seat surface 40a. The valve seat surface 40a and the annular protrusion 40b form the valve seat 40 against which the main valve element 41 can abut from below X1. In this example, the cross section of the annular protrusion 40b has a shape that tapers downward X1, and has a tapered surface that slopes downward X1 toward the inner periphery.

[0060] The main valve element 41 includes a valve body 45 having a through hole 41a, and an annular packing 74 attached to the upper end portion of the valve body 45. The annular packing 74 is an elastic member. As shown in Figures 12, 13, 14, and 15, the valve body 45 is divided into a small diameter portion 75 having an outer dimension smaller than the inner diameter of the annular protrusion 37, a large diameter portion 76 having an outer dimension larger than the inner diameter of the annular protrusion 37, and a tapered portion 77 extending downward from the large diameter portion 76. 14, the main valve element 41 has a tapered portion 77 in the valve body 45, so that when viewed from a direction perpendicular to the axis L, the lower portion of the main valve element 41 has a tapered shape in which the outer diameter dimension decreases downward X1. As shown in FIG. 15, the valve body 45 has an annular slit 78 extending from the radially outer side to the radially inner side at the boundary between the large diameter portion 76 and the small diameter portion 75. The inner peripheral portion of the annular packing 74 is inserted into the slit 78 from the radially outer side. As a result, the annular packing 74 is attached to the large diameter portion 76 with its outer peripheral portion exposed to the inner peripheral side and upward X2 from the valve body 45.

[0061] The through hole 41a provided in the valve body 45 comprises, in this order from the upper side X2 to the lower side X1, a small diameter hole portion 81 located on the inner circumferential side of the small diameter portion 75, a large diameter hole portion 82 located on the inner circumferential side of the large diameter portion 76 and having an inner diameter dimension larger than that of the small diameter hole portion 81, and a medium diameter hole portion 83 located on the inner circumferential side of the tapered portion 77 and having an inner diameter dimension larger than that of the small diameter hole portion 81 and smaller than that of the large diameter hole portion 82. The inner diameter dimensions of the small diameter portion 75 and the medium diameter hole portion 83 are constant in the up-down direction X.

[0062] 12, the valve mechanism 15 is in a flow path closed state 15A in which the internal flow path 11 is closed. Also, in the state shown in FIG. 12, the drain valve mechanism 16 is in a drain port closed state 16A in which the drain port 7 is closed. When the valve mechanism 15 is in the flow path closed state 15A, the main valve element 41 abuts against the valve seat 40. In the state in which the main valve element 41 abuts against the valve seat 40 to close the internal flow path 11, the annular packing 74 elastically deforms and abuts against the valve seat surface 40a and the annular protrusion 40b. When the main valve element 41 abuts against the valve seat 40, the small diameter portion 75 of the valve body 45 is located above the valve seat 40 at X2 and radially inward of the annular protrusion 37.

[0063] As shown in Figures 13 and 14, the movable valve element portion 42 is the lower portion of the rod-shaped composite member 70. The movable valve element portion 42 is continuous with the lower portion X1 of the valve stem main body portion 25. As shown in Figure 15, the movable valve element portion 42 includes a column portion 51 inserted into the small-diameter hole portion 81 of the through-hole 41a to close the through-hole 41a, and a flange portion 52 extending radially outward from the lower end of the column portion 51. Here, the valve stem main body portion 25 is the upper portion of the composite member 70 and includes a protruding portion 85 having a smaller diameter than the column portion 51 and protruding upward toward X2 from the center of the column portion 51, and a shaft portion 86 having a smaller diameter than the protruding portion 85 and protruding upward toward X2 from the center of the protruding portion 85. The shaft portion 86 has a male thread 12a on its outer circumferential surface and is supported by a support portion 13. The upper end of the shaft portion 86 is connected to the outer rectangular tube member 26 by a connecting member 73.

[0064] The spring member 43 (coil spring) is disposed on the outer periphery of the column portion 51 of the movable valve body portion 42. The lower end of the spring member 43 is connected to the flange portion 52. The upper end of the spring member 43 is connected to the downward-facing annular surface of a step formed between the small diameter hole portion 81 and the large diameter hole portion 82 on the inner circumferential surface of the through hole 41a of the valve body 45. When the movable valve body portion 42 moves relative to the valve body 45, the outer circumferential surface of the flange portion 52 of the movable valve body portion 42 comes into sliding contact with the inner wall surface of the medium diameter hole portion 83 of the valve body 45.

[0065] As shown in FIGS. 13 and 14 , the valve disc holder 44 includes a first holder member 71 and a second holder member 72 stacked above the first holder member 71 at the X2 position. As shown in FIG. 15 , the first holder member 71 includes an annular first plate portion 88 having a central hole with a diameter smaller than that of the small-diameter hole portion 81, and a first cylindrical portion 89 rising from the inner peripheral edge of the first plate portion 88 at the X2 position. The outer diameter of the first plate portion 88 is smaller than the inner diameter of the annular protrusion 37. The first cylindrical portion 89 has an inner diameter corresponding to the central hole of the first plate portion 88. The second holder member 72 includes an annular second plate portion 90 placed on the first plate portion 88 on the outer peripheral side of the first cylindrical portion 89, and a second cylindrical portion 91 rising from the inner peripheral edge of the second plate portion 90. When the second holding member 72 is placed on the first holding member 71, the upper end of the first cylindrical portion 89 and the upper end of the second cylindrical portion 91 are aligned. They are aligned in the downward direction X. Furthermore, when the second holding member 72 is placed on the first holding member 71, the outer peripheral edge of the first plate portion 88 and the outer peripheral edge of the second plate portion 90 are aligned in the radial direction. With the second holding member 72 overlapping the first holding member 71, the outer diameter of the valve disc holding member 44 is smaller than the inner diameter of the valve seat 40.

[0066] Here, the opening edge of the central hole in the lower surface of the valve disc holding member 44, i.e., the opening edge of the central hole in the lower surface of the first plate portion 88 of the first holding member 71, rests on the outer peripheral edge of the upper surface of the column portion 51 of the movable valve disc portion 42. Therefore, the lower surface of the valve disc holding member 44 is perpendicular to the valve shaft 12 and is located on the same plane as the upper surface of the movable valve disc portion 42.

[0067] A protruding portion 85 of the valve stem main body portion 25, which protrudes upward in the X2 direction from the through-hole 41a of the main valve element 41, passes through the central hole of the valve element holding member 44. The valve element holding member 44 is attached to the lower end portion of the valve stem 12 (valve stem main body portion 25) in a state where it is sandwiched in the vertical direction X between two nuts 93 screwed onto the protruding portion 85 from the upward X2 direction and the movable valve element portion 42 (pillar portion 51). This allows the valve element holding member 44 to move in the vertical direction X together with the composite member 70 (valve stem main body portion 25 and movable valve element portion 42).

[0068] As shown in FIG. 12, the drain valve mechanism 16 includes a drain valve 61 for opening and closing the drain port 7, a locking claw 62 protruding inward from the drain valve 61, and a biasing member 63. As shown in FIGS. 13 and 14, the drain valve 61 is cylindrical. The drain valve 61 is movable along the inner wall surface of the pipe section 4 (second pipe member 20) between a closed position 61A that closes the drain port 7 and an open position 61B (see FIG. 17 described later) that communicates with the internal flow path 11. The closed position 61A is located at X1 below the open position 61B. As shown in FIG. 12, when the drain valve 61 is in the closed position 61A, the lower end of the drain valve 61 abuts against the annular protrusion 37 of the second pipe member 20 from above X2.

[0069] As shown in FIG. 14, the locking claws 62 protrude inward from three circumferential positions of the cylindrical drain valve 61. In this example, the locking claws 62 are provided at equal angular intervals. The biasing member 63 is a coil spring disposed between the large-diameter cylindrical portion 33 of the valve stem guide 31 and the drain valve 61. As shown in FIG. 12, the biasing member 63 (coil spring) is located on the outer circumferential side of the small-diameter cylindrical portion 32. The upper end of the biasing member 63 abuts against the large-diameter cylindrical portion 33 of the valve stem guide 31, and the lower end abuts against the drain valve 61. Here, the biasing member 63 biases the drain valve 61 from the open position 61B side toward the closed position 61A. In other words, the biasing member 63 biases the drain valve 61 from above X2 toward the annular protrusion 37 of the second pipe member 20.

[0070] (Operation of water intake valve) Figure 16 is an explanatory diagram illustrating the state of the water intake tap 1A when taking in water. Figure 17 is an explanatory diagram of the water intake tap 1A when the valve mechanism 15 is in a flow path closed state 15A and the drain valve mechanism 16 is in a drain port open state 16B.

[0071] As shown in Figure 16, when water is taken in, the valve mechanism 15 has the valve disc holding member 44 abut against the main valve disc 41 from above X2, moving the main valve disc 41 downward X1 from the valve seat 40. That is, when water is taken in, the valve mechanism 15 is in a flow path open state 15B in which the internal flow path 11 is open. Also, when water is taken in, the drain valve mechanism 16 is in a drain outlet closed state 16A in which the drain valve 61 is in a closed position 61A in which the drain outlet 7 is closed. As a result, water in the distribution pipe 9 flows into the pipe section 4 through the water intake 2, passes through the internal flow path 11, and is released from the water discharge outlet 5, as shown by the white arrow.

[0072] When the valve stem 12 is rotated in a predetermined closing direction from the state shown in FIG. 16 (the valve mechanism 15 is in a flow path open state 15B and the drain valve mechanism 16 is in a drain port closed state 16A) and the valve stem 12 is moved upward to X2, the main valve body 41 moves upward to X2 together with the valve body holding member 44 and the movable valve body portion 42. 12, the valve mechanism 15 transitions to a flow path closed state 15A in which the internal flow path 11 is closed. When the valve mechanism 15 is in the flow path closed state 15A, the spring member 43 exerts a biasing force that biases the valve body 45 against the valve seat 40.

[0073] When the valve shaft 12 is further rotated in the closing direction from this state (the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port closed state 16A), as shown in FIG. 17, the valve body holding member 44 moves upward X2 away from the main valve body 41 while the main valve body 41 abuts against the valve seat 40. Furthermore, the valve body holding member 44 moving upward X2 engages with the locking claw 62 from the downward X1, moving the drain valve 61 to the open position 61B. This causes the drain valve mechanism 16 to transition to the drain port open state 16B, which opens the drain port 7. When the valve mechanism 15 is in the flow path closed state 15A and the drain valve mechanism 16 is in the drain port open state 16B, water that has accumulated in the internal flow path 11 above the valve seat 40 at X2 is discharged from the drain port 7, as shown by the white arrow in FIG. 17.

[0074] Next, from the state shown in Figure 17 (valve mechanism 15 in flow path closed state 15A and drain valve mechanism 16 in drain port open state 16B), when the valve stem 12 is rotated in the opening direction opposite to the closing direction to move the valve stem 12 downward X1, the drain valve 61 moves to the closed position 61A by the biasing force of the biasing member 63 as the valve body holding member 44 moves downward X1. As a result, the drain valve mechanism 16 transitions to the drain port closed state 16A in which the drain valve 61 is arranged in the closed position 61A, as shown in Figure 12. In other words, the water intake tap 1A has the valve mechanism 15 in the flow path closed state 15A and the drain valve mechanism 16 in the drain port closed state 16A.

[0075] Furthermore, when the valve stem 12 is rotated in the opening direction from the state shown in Figure 12 (valve mechanism 15 in flow path closed state 15A and drain valve mechanism 16 in drain port closed state 16A) to move said valve stem 12 downward X1, the valve body holding member 44 moves downward X1 and abuts against the main valve body 41 from above X2, separating said main valve body 41 downward X1 from the valve seat 40. As a result, as shown in Figure 16, the valve mechanism 15 of the water intake tap 1A transitions to the flow path open state 15B. That is, in the water intake tap 1A, the drain valve mechanism 16 is in the drain port closed state 16A and the valve mechanism 15 is in the flow path open state 15B, making it possible to take in water.

[0076] (Action and effect) In the water intake tap 1A of this example as well, the water intake can be stopped and the water remaining in the internal flow path 11 can be discharged in succession by a series of operations for rotating the valve stem 12 in the closing direction.

[0077] Here, since the water intake valve 1A does not have a bolt member 65, if the biasing member 63 that biases the drain valve 61 to the closed position 61A is damaged, the drain valve mechanism 16 cannot be transitioned to the drain outlet closed state 16A, but apart from this, the same functional effects as those of the water intake valve 1 can be obtained.

[0078] In this example, the main valve element 41 is provided with an annular packing 74 that can abut against the valve seat 40 from the water intake 2 side. The valve seat 40 has a valve seat surface 40a that is perpendicular to the axis L of the valve stem 12 and an annular protrusion that protrudes from the valve seat surface 40a. When the main valve element 41 abuts against the valve seat 40, the annular packing 74 elastically deforms and contacts the annular protrusion and the valve seat surface 40a. Therefore, when the main valve element 41 abuts against the valve seat 40, the internal flow path 11 can be reliably closed. If the valve seat surface 40a against which the main valve element 41 abuts is a tapered surface whose inner diameter decreases upward in the direction X2, when the main valve element 41 is pushed upward by water flowing in from the water intake 2, the main valve element 41 may become stuck in the central hole of the valve seat 40, and force may be required to separate the main valve element 41 from the valve seat surface 40a. In contrast, in this example, the valve seat surface 40a against which the main valve element 41 abuts is perpendicular to the axis L of the valve stem 12. Therefore, even if the main valve element 41 is pushed upward X2 by the water flowing in from the water intake 2, it is possible to prevent or suppress the main valve element 41 from getting stuck in the central hole of the annular valve seat 40. Therefore, it is possible to move the main valve element 41 away from the valve seat surface 40a toward the water intake 2. This makes it easier to space the

[0079] Furthermore, the lower portion of the main valve element 41 has a shape that tapers toward the water intake 2 in the direction along the axis L. Therefore, when the main valve element 41 is moved from the valve seat 40 toward the water intake 2, the water pressure acting on the main valve element 41 can be reduced. [Explanation of symbols]

[0080] 1·1A...water intake valve, 2...water intake port, 3...bent portion, 4...pipe section, 5...water outlet, 6...handle, 7...drain outlet, 9...distribution pipe, 11...internal flow path, 12...valve stem, 12a...male thread, 13...support portion, 13a...female thread, 15...valve mechanism, 15A...flow path closed state, 15B...flow path open state, 16...drain valve mechanism, 16A...drain outlet closed state, 16B...drain outlet open state, 19...first pipe member, 20...second pipe member, 20a...annular step portion, 21...elbow member, 22...large diameter pipe member, 23...small diameter pipe member, 25...valve stem body / valve stem body portion, 25a...recess, 26...outer square tube member, 27...inner square tube member, 31...valve stem guide, 32...small diameter cylindrical portion, 33...large diameter cylindrical portion, 34...connection portion, 35...step portion, 37...annular protrusion, 37a...annular end surface, 40...valve seat, 40a...valve seat surface, 40b...annular protrusion, 41...main valve body, 41a...through hole, 42...movable valve body / movable valve body portion, 43...spring member, 44...valve Body holding member, 44a...center hole, 45...valve body, 46...sheet packing, 46a...opening, 47...flat plate portion, 48...tapered plate portion, 49...annular plate portion, 50...tubular portion, 51...pillar portion, 52...flange portion, 53...connecting shaft portion, 54...connecting member, 54a...small diameter portion, 54b...large diameter portion, 61...drain valve, 61A...closed position, 61B...open position, 62...locking claw, 63...biasing member, 65...bolt member, 65a...shaft portion, 65b...head portion, 66... Opening, 70...composite member, 71...first holding member, 72...second holding member, 73...connecting member, 74...annular packing, 75...small diameter portion, 76...large diameter portion, 77...tapered portion, 78...slit, 81...small diameter hole portion, 82...large diameter hole portion, 83...medium diameter hole portion, 85...protruding portion, 86...shaft portion, 88...first plate portion, 89...first cylindrical portion, 90...second plate portion, 91...second cylindrical portion, 93...nut, X1...downward, X2...upward, X2...vertical direction

Claims

1. a pipe portion having a water intake at a lower end, a water discharge port at an upper portion, and an internal flow path connecting the water intake and the water discharge port; a valve stem extending in the vertical direction inside the pipe portion and having a male thread on its outer circumferential surface; a cylindrical support portion fixed to the inside of the pipe portion below the water outlet and having a female thread that screws onto the male thread; a valve mechanism that opens and closes the internal flow path; A drain port that penetrates the pipe portion below the support portion in a direction intersecting the up-down direction; a drain valve mechanism that opens and closes the drain outlet, The valve mechanism includes: an annular valve seat provided below the drain outlet; a main valve body having a through hole passing through in the vertical direction; a movable valve body that is inserted into the through hole to close the through hole and is movable in the vertical direction relative to the main valve body; a valve body pressing member that moves integrally with the valve stem above the main valve body; and a spring member that connects the main valve body and the movable valve body on the side of the main valve body opposite the valve seat. the main valve body is capable of abutting against the valve seat from the water intake side, the movable valve element is fixed to the lower end of the valve shaft and moves integrally with the valve shaft; The outer diameter of the valve disc holding member is smaller than the inner diameter of the valve seat, The drain valve mechanism includes a drain valve that is movable along the inner wall surface of the pipe portion between an open position that connects the drain outlet to the internal flow path and a closed position that closes the drain outlet below the open position, a locking claw that protrudes inward from the drain valve, and a biasing member that biases the drain valve from the open position toward the closed position, When taking in water, the valve mechanism is in a flow path open state in which the valve body pressing member abuts against the main valve body from above to separate the main valve body downward from the valve seat, and the drain valve mechanism is in a drain outlet closed state in which the drain valve is positioned at the closed position to close the drain outlet, When the valve mechanism is in the flow path open state and the drain valve mechanism is in the drain port closed state, by rotating the valve stem in a predetermined closing direction to move the valve stem upward, the main valve body moves upward together with the valve body pressing member and the movable valve body and abuts against the valve seat from below, and the valve mechanism transitions to a flow path closed state in which it closes the internal flow path, A water intake faucet characterized in that when the valve shaft is rotated in the closing direction while the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet closed state, the valve body holding member moves upward away from the main valve body while the main valve body abuts against the valve seat, and the valve body holding member engages with the locking claw to move the drain valve from the closed position to the open position, and the drain valve mechanism transitions to a drain outlet open state in which it opens the drain outlet.

2. the movable valve body includes a column portion that is inserted into the through hole to close the through hole, and a flange portion that extends radially outward from a lower end of the column portion, The water intake faucet described in claim 1, characterized in that the spring member is a coil spring, is arranged on the outer periphery of the column portion, has its lower end connected to the flange portion, and its upper side connected to the valve body, and exerts a biasing force that biases the valve body against the valve seat when the valve mechanism is in the flow path closed state.

3. 3. A water intake faucet according to claim 1, wherein the lower surface of the valve body holding member is located on the same plane as the upper surface of the movable valve body, perpendicular to the valve axis.

4. A water intake faucet as described in claim 1, characterized in that when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet open state, if the valve shaft is rotated in the opening direction opposite to the closing direction to move the valve shaft downward, the drain valve moves to the closed position by the biasing force of the biasing member as the valve body holding member moves downward, and the drain valve mechanism transitions to a drain outlet closed state in which the drain valve is positioned in the closed position.

5. A water intake faucet as described in claim 4, characterized in that when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet closed state, if the valve shaft is rotated in the opening direction to move the valve shaft downward, the valve body holding member abuts against the main valve body from above, separating the main valve body downward from the valve seat, and the valve mechanism transitions to the flow path open state.

6. the drain valve mechanism includes a bolt member including a shaft portion and a head portion provided at an upper end of the shaft portion and having an outer diameter dimension larger than that of the shaft portion; The locking claw has an opening through which the shaft portion passes in the up-down direction, The inner diameter of the opening is smaller than the outer diameter of the head, The bolt member has a lower end portion of the shaft portion fixed to the valve disc holding member, A water intake faucet as described in claim 1, characterized in that when the valve mechanism is in the flow path closed state and the drain valve mechanism is in the drain outlet open state, rotating the valve stem in the opening direction to move the valve stem downward causes the valve body holding member to move downward and abut against the main valve body from above, separating the main valve body downward from the valve seat, and the bolt member moves downward together with the valve body holding member, causing the head to abut against the locking claw from above, causing the drain valve to reach the closed position.

7. the main valve body includes an elastic member that can abut against the valve seat from the water intake side, The valve seat includes a valve seat surface perpendicular to the axis of the valve stem and an annular protrusion protruding from the valve seat surface, 2. A water intake valve as claimed in claim 1, wherein when the main valve body abuts against the valve seat, the elastic member elastically deforms to come into contact with the annular protrusion and the valve seat surface.

8. The water intake valve as described in claim 1, characterized in that the main valve body has a tapered shape in its lower part, when viewed from a direction perpendicular to the axis of the valve shaft, such that the outer diameter dimension decreases toward the bottom.

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