JP2012057665A - Resin water stop valve cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin water stop valve cartridge which is completely made of synthetic resin, to reduce the weight and solve problems inherent in the conventional brass material such as reduction in strength and elution of controlled substance during use.SOLUTION: The whole of a housing 10 and the whole of a valve stem 30 are made of synthetic resin. In the housing 10, in a small-diameter cylindrical part SC, a storage space part of a movable disk 41 and a stationary disk 45 has a small first wall thickness durable for a water pressure applied to the movable disk 41 and the stationary disk 45. The wall of a clamping male screw part 15 has a large second wall thickness which is larger than the first wall thickness of the small-diameter cylindrical part and is durable for a physical load applied to the clamping male screw part 15 when a clamping part 11 is clamped. A flat ring-shaped step surface 18 generated by a difference between the first wall thickness and the second wall thickness is formed on a position which is aligned with the position on the other end side of the clamping male screw part 15, on the inner circumferential surface of the small-diameter cylindrical part SC.

Description

  The present invention relates to a resin water stop valve cartridge.

  Conventionally, a water faucet is provided with a water stop valve in a handle portion for opening and closing operations, and the water stop valve is opened or closed by tilting the handle portion up and down or rotating in the circumferential direction. The valve is closed to discharge or stop water from the water supply source through the water outlet. Some of the water stop valves have excellent operability using a ceramic disk as a valve member for performing a valve opening operation and a valve closing operation. In addition, it is necessary to perform maintenance such as replacement of consumable parts due to wear due to aging in about 2 to 10 years. In recent years, each part of the stop valve has been designed to facilitate this maintenance work. Development of a water stop valve cartridge that integrates and integrates the inside of the housing into the housing is progressing. Here, in the case of a single water faucet, it is common to use a brass housing as the housing.

  In addition, although a use differs from the said water stop valve, there exists invention of patent document 1 as invention regarding the multi-way switching valve (three-way switching valve) using the ceramic disk similar to a water stop valve, for example. Patent Document 1 discloses a three-way switching valve that can save space by suppressing the amount of protrusion of a ceramic valve cartridge, and that improves the degree of freedom in layout, such as the mounting location and mounting direction. The valve member includes a ceramic movable valve disk that rotates in conjunction with an opening / closing operation of the handle, and a ceramic fixed valve that is slidably contacted with the movable valve disk and provided in a non-rotatable state. The ceramic valve cartridge is provided with a disk. The ceramic valve cartridge is stored in the storage chamber of the valve housing, and a bypass flow path that bypasses the storage chamber is formed between the wall surface of the storage chamber and the outer peripheral surface of the valve housing. The wall surface and the end portion on the water inlet side of the ceramic valve cartridge are partitioned, and the branch channel is formed by communicating a bypass channel and a valve water discharge port disposed in the valve housing.

JP 2007-170510 A

[Problems when using brass materials]
However, the brass material is a metal material excellent in corrosion resistance and durability, and although it is a material that originally has the necessary mechanical strength, zinc contained in brass elutes due to long-term water contact, In recent years, it has become clear that a so-called dezincification corrosion phenomenon that prevents the mechanical strength from being maintained occurs. In addition, as a brass material used for water supply products including a water stop valve housing, free-cutting brass with improved machinability and workability is often used. Lead is included to enhance the properties. Moreover, cadmium is generally contained as an impurity (though it is a trace amount) in zinc which is a brass-containing material. Therefore, when the water stop valve cartridge housing is manufactured using brass material, the mechanical strength decreases due to the dezincification corrosion phenomenon, and the elution and inclusion of lead and cadmium in the water flowing in the water stop valve cartridge. Points may occur. In addition, due to the recent increase in international environmental protection awareness, various regulations to prevent the spread of environmental pollutants, such as the RoHS Directive (Restrictions on Hazardous Substances) by the European Union, etc. are also applied to water products. There is a need to reliably prevent elution of the lead and cadmium.

[Insufficient strength due to resinization]
Therefore, in view of the above points, in recent years, even in the water stop valve cartridge, it has been sought to use a brass housing as another material that does not cause the above problems. And, as a substitute for the brass material, the inventors of the present invention, if the main material of the water stop valve cartridge is made of a synthetic resin, has the disadvantage that the mechanical strength is reduced due to the dezincification corrosion phenomenon and the elution of lead and cadmium. Focusing on the fact that it can be completely eliminated, the idea of selecting and constructing the material was the result of repeated experimentation and repeated trials and errors. As a result, parts such as housings made of conventional brass materials were simply made of synthetic resin. It was confirmed that a new problem would occur especially in terms of strength by simply replacing with. That is, first, in the water stop valve cartridge, the male screw provided in a part of the housing in the axial direction (generally near the central portion in the axial direction) is changed to the female screw provided in the opening for accommodating the stop valve in the handle portion of the water tap. By screwing and tightening, it is attached to the handle portion in a watertight manner. Here, in order to screw the male screw into the female screw, a hexagonal nut-like tightening portion integrally formed at one end portion in the axial direction of the housing (the end portion exposed from the opening of the handle portion) However, at this time, a large mechanical load (physical load) is applied to the male screw portion (particularly each screw thread portion) of the water stop valve cartridge. Accordingly, since the synthetic resin material has a lower mechanical strength than the brass material, simply replacing the brass material with the synthetic resin material causes the male screw portion of the water stop valve cartridge housing to be tightened. The problem of breakage occurs. In particular, the wall thickness of the male screw portion of the housing is minimized at the valley bottom position of each screw groove of the male screw, and the housing is most easily damaged at the valley bottom portion.

[A trade-off between increasing the strength of the plastic housing and securing the water flow rate]
On the other hand, a valve member (movable disk) made of a ceramic disk is provided on the other end side (opposite side to the tightening portion in the axial direction) of the male screw inside a portion (cylindrical peripheral wall) of the housing where the male screw is provided. And a fixed disk) are housed and mounted, and are drivingly connected to a stopper rod extending from one axial end of the housing to the valve member. Then, by rotating the plug rod in the forward and backward direction within a predetermined angle range, the movable disk rotates in the forward and backward direction, and performs a valve opening operation (water flow operation) or a valve closing operation (water stop operation) together with the fixed disk. It is like that. That is, the opening of the peripheral wall at the other axial end of the housing is a water inlet into which water from the water supply source flows, and the position near the male screw on the other end side of the male screw of the peripheral wall of the housing. In this case, a water outlet from which water from a water supply source flows through the valve member is formed. Furthermore, each of the movable disk and the fixed disk has a water passage hole for allowing water flowing in from the water inlet of the housing to pass through at a corresponding angular position and angle range. Passes through the water inlet of the fixed disk and the movable disk, then flows out of the water outlet of the housing, and finally flows out to the water discharge pipe of the water tap. At this time, the volume of the water passage hole of the movable disk and the fixed disk is determined by the final passage amount (and the maximum water passage amount) of the water flowing from the water inlet of the housing, that is, the water discharge amount (and the maximum water discharge amount) of the faucet. In particular, the present inventors, among the two elements (opening area and thickness of the water passage hole) that determine the volume of the water passage hole of the movable disk and the fixed disk, It was discovered that the area has a great influence on the amount of water flow allowance. Therefore, simply increasing the wall thickness of the peripheral wall of the housing to compensate for the strength reduction due to the use of synthetic resin, the diameter of the inner peripheral surface of the peripheral wall of the housing is correspondingly reduced and can be accommodated in the peripheral wall accordingly. The size of the movable disk and the fixed disk is also reduced, and it is necessary to use a smaller movable disk and a fixed disk than in the case of a conventional brass housing. The opening area of the hole becomes small, and the necessary water flow rate (and the maximum water flow rate) cannot be secured.

[Manufacturing technology]
Further, when the main parts such as the housing of the water stop valve cartridge are made of synthetic resin, the water stop valve cartridge itself has a relatively small size, and the external structure of the housing is somewhat complicated such as the tightening portion and the male screw. It has a shape and structure, and the internal structure is also a locking structure for restricting the rotation range of the movable disk by restricting the rotation range of the plug bar to a predetermined angle range, and the state where the fixed disk cannot be rotated Thus, the shape and structure are somewhat complicated, such as a locking structure for fixing at a predetermined position inside the peripheral wall. Similarly, the structure of the plug bar has a somewhat complicated shape corresponding to the internal structure of the housing. According to the knowledge of the present inventors, when a predetermined synthetic resin material is injection-molded and integrally molded with the same shape as a conventional brass housing or plug rod, according to the physical properties specific to the synthetic resin material, There is a possibility that it may be difficult to ensure the dimensional accuracy of the desired shape by injection molding, or a defect such as a manufacturing defect may occur and a yield may be reduced. In particular, for the housing, as described above, in addition to the decrease in strength of the material itself due to the synthetic resin, the physical properties of the selected synthetic resin material itself at the time of injection molding have an effect on the securing of mechanical strength and dimensional accuracy. In particular, the selection of an appropriate synthetic resin material to ensure the mechanical strength and durability (sufficient strength and durability against the tightening load by the above tools) required for the male screw portion of the peripheral wall And selection of the molding technique of the synthetic resin material is important.

[Problems to be solved by the present invention]
Therefore, the present invention provides various characteristics such as required mechanical strength and durability, especially when a large load is applied even when the material of the housing and the stopper rod, which are main parts, is changed from a conventional brass material to a synthetic resin material. It is possible to satisfy the requirements such as mechanical strength and durability in the male screw part of the housing sufficiently, and by making it possible to make a completely synthetic resin, it is possible to reduce the weight by synthetic resin, and to the conventional brass material It is an object of the present invention to provide a resin water stop valve cartridge capable of solving inherent problems (such as strength reduction due to use and elution of regulated substances).

  The resin water stop valve cartridge according to claim 1 is a housing in which all parts are integrally molded from a synthetic resin having relatively high strength in the synthetic resin material, and all parts are relatively in the synthetic resin material. Are integrally molded from a synthetic resin having a low coefficient of friction, and are inserted from one axial end of the housing and extend in the axial direction of the housing. A fixed disk made of a ceramic disk, and an interior of the housing on one axial end side of the housing so as to be rotatable within a predetermined rotation range on the inner side of the fixed disk and drivingly connected to the tip of the plug bar And a movable disk made of a ceramic disk that rotates within the rotation range when the plug bar is rotated. Further, the resin water stop valve cartridge has a water passage space to be attached (typically, a housing space that is formed in a water faucet, in particular, a single water faucet, and can accommodate an inner portion on one axial end side of the housing. In this case, one end in the axial direction of the housing is accommodated in a housing (flow path or water flow path connecting an inlet and an outlet of raw water from a water supply source) and is detachably fixed. Typically, in the resin water stop valve cartridge, an operation handle of the handle portion is detachably fixed to a portion (one end portion of the plug bar) exposed to the outside of the water flow space to be attached. . The housing has a hexagonal nut shape integrally formed on one end side in the axial direction of the housing, and has a tightening portion in which a through-hole (usually circular in cross section) that penetrates in the axial direction is formed in the center portion, and the tightening A large-diameter cylindrical portion having a cylindrical shape with a predetermined outer diameter formed integrally with the central portion in the axial direction of the housing so as to be coaxial with the portion, and coaxial with the large-diameter cylindrical portion and the large-diameter A small-diameter cylindrical portion integrally formed on the other axial end side of the housing so as to have a cylindrical shape with a smaller diameter than the cylindrical portion. The small-diameter cylindrical portion includes a fastening male screw portion that is integrally formed on the outer peripheral surface of the proximal end that is a boundary side with the large-diameter cylindrical portion in the small-diameter cylindrical portion, and a circular shape that opens at the distal end of the small-diameter cylindrical portion. And a water outlet that is formed in the vicinity of the fastening male screw portion in the small-diameter cylindrical portion. The movable disk and the fixed disk are accommodated and disposed at a predetermined position on the other end side of the fastening male screw part in the internal space of the small diameter cylindrical part. Further, in the small-diameter cylindrical portion, the housing further has a (small) first wall thickness that can withstand the water pressure applied to the movable disk and the fixed disk. The physical thickness of the male screw part for fastening is larger than the first wall thickness of the small-diameter cylindrical part, and is physically applied to the male screw part for fastening as the fastening part is tightened (mechanical machine). As a second wall thickness that can withstand a load (large), the first wall thickness is aligned with the position on the other end side of the fastening male screw portion on the inner peripheral surface of the small-diameter cylindrical portion. And a flat ring-shaped step surface due to the difference between the second wall thickness and the second wall thickness.

  In the resin water stop valve cartridge according to claim 2, in the configuration of claim 1, the housing is integrally formed from polyphenylene sulfide resin, and the plug bar is formed integrally from polyacetal resin. Yes.

  In the resin water stop valve cartridge according to claim 3, in the configuration of claim 1 or 2, in the axial direction, the housing extends from one end of the large-diameter cylindrical portion to the fastening male screw portion of the small-diameter cylindrical portion. The center of the housing extends in the axial direction up to the other end, and an insertion hole having a diameter larger than the diameter of the through hole of the tightening portion is formed. The small-diameter cylindrical portion of the housing has the maximum wall thickness at the fastening male screw portion having the second wall thickness, and the minimum wall thickness at the cylindrical portion having the first wall thickness. Yes. Further, the fastening male screw portion has a wall thickness that can ensure the mechanical strength that can withstand the physical load even at the minimum wall thickness portion of the thread mountain valley portion of the fastening male screw. The cylindrical portion has a wall thickness that can secure an inner diameter that can secure a necessary volume for securing the amount of flowing water and a minimum strength that can withstand a load caused by water pressure in the cylindrical portion.

  In the resin water stop valve cartridge according to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, the small-diameter cylindrical portion is disposed at one end side from the fastening male screw portion in the axial direction of the small-diameter cylindrical portion. A short cylindrical concave groove part constituting a base end part is integrally formed on the base end side of the fastening male screw part with the same wall thickness as the minimum wall thickness of the fastening male screw part, and the concave groove part An O-ring is attached to the O-ring, and the O-ring is elastically contacted with the female screw portion to be attached so as to maintain watertightness, and the concave groove portion is connected to the fastening male screw portion via the O-ring. Is designed to absorb elastic loads.

  In the resin water stop valve cartridge according to claim 5, in the configuration according to any one of claims 1 to 4, an inner diameter of the fastening male screw portion is set larger than an inner diameter of the fastening portion by a predetermined dimension. The wall thickness of the fastening male screw portion is set to be equal to the wall thickness of the fastening portion.

  In the resin water stop valve cartridge according to claim 6, in the structure according to any one of claims 1 to 5, in the fastening male screw portion, a screw thread of a male screw of the fastening male screw portion is the fastening screw. The spiral starts from one axial end of the male screw portion, ends at the other axial end of the fastening male screw portion, and all the portions where the screw threads are arranged are set to the second wall thickness. ing. Further, the cylindrical portion extends in the axial direction from a position immediately after the position where the screw thread of the fastening male screw portion is spiraled, which is a boundary line position with the fastening male screw portion.

  In the resin water stop valve cartridge according to claim 7, in the structure according to any one of claims 1 to 6, the stopper bar has a planar shape that is the same as the planar shape of the movable disk at the tip that is the other end in the axial direction. A disk-shaped drive board having a plurality of members, and a plug bar connected to the movable disk by engaging with an outer peripheral edge of the movable disk on a surface of the drive board facing the movable disk. A pair of engaging projections are integrally formed. Further, in the cylindrical portion having the first wall thickness of the small-diameter cylindrical portion, there is a gap between the flat ring-shaped step surface due to the difference between the first wall thickness and the second wall thickness and the water outlet. A housing space having a circular cross section having an outer shape corresponding to the outer diameter of the driving plate is formed with the same thickness as the driving plate of the plug bar, and the driving plate is housed in the housing space.

  According to an eighth aspect of the present invention, there is provided the resin water stop valve cartridge according to the seventh aspect, wherein the movable disk includes two fan-shaped portions having a fan-shaped shape having a central angle of about 90 degrees and an angle of 180 degrees. In a state of being symmetrically arranged facing each other, the center sides thereof have a predetermined different shape connected to each other by a center portion having a small plate shape of a predetermined size. The movable disk forms a pair of flat fan-shaped water passage recesses by the opposing side surfaces of the two fan-shaped portions and the side surface of the central portion, and has an angle of 180 degrees at the outer peripheral portion of one side surface of the fan-shaped portions. A pair of engaging projections on the drive panel of the plug bar, in which the engaging recesses of a substantially rectangular recess shape are formed, respectively, and the pair of engaging recesses are mounted on the housing. And is disposed in an internal space corresponding to the water outlet of the small diameter cylindrical portion.

  In the resin water stop valve cartridge according to claim 1, the present invention provides the necessary mechanical strength and durability even when the material of the housing and the stopper rod, which are main components, is changed from a conventional brass material to a synthetic resin material. Synthetic resin by fully satisfying the requirements such as mechanical strength and durability, etc. in the male screw part of the housing where heavy load is applied. It is possible to solve the problem of weight reduction due to the reduction of the weight and the problems inherent in conventional brass materials (such as strength reduction and elution of regulated substances due to use).

  In addition to the effect of claim 1, the resin water stop valve cartridge according to claim 2 can surely make the physical and mechanical strength of the male screw portion for fastening the housing higher than the required strength, It is possible to form a male screw with high precision by precision formability, and to improve the physical and mechanical strength of the fastening male screw part also by improving the precision. Furthermore, the frictional resistance of the plug bar is greatly reduced, the sliding resistance between the outer peripheral surface of the plug bar and the inner peripheral surface of the hole of the housing is made extremely small, and a smooth turning operation is possible.

  The resin water stop valve cartridge according to claim 3 has a wall in which, in addition to the effect of claim 1 or 2, the male screw portion for fastening becomes the maximum wall thickness portion of the small-diameter cylindrical portion, and the required mechanical strength can be satisfied. Thick. In addition, the cylindrical part becomes the minimum wall thickness part, so that the opening area can be secured large, and even when the thickness of the movable disk and fixed disk is reduced, a large flow path volume can be secured, and the required flow rate The water can be made to flow reliably.

  In addition to the effect of any one of claims 1 to 3, the resin stop valve cartridge according to claim 4 is configured such that the concave groove portion, which is a short cylindrical body having a large wall thickness, applies a load applied to the fastening male screw portion. While supporting on the side, part of the load is absorbed. Accordingly, it is possible to more effectively prevent the fastening male screw portion from being damaged by the load applied from the fastening portion to the fastening male screw portion when the housing is mounted. In particular, when the housing is inserted and attached to the attachment target, an O-ring is attached to the recessed groove portion, and the O-ring is located in the immediate vicinity of the female screw portion to be attached (the inner peripheral wall on the opening end side from the female screw portion). The groove part can elastically absorb the load from the fastening male screw part via the O-ring, and the damage to the fastening male screw part can be more effectively performed. Can be prevented.

  In addition to the effect of any one of claims 1 to 3, the resin stop valve cartridge according to claim 5 is configured such that the inner diameter of the fastening male screw portion is set to be the same as the inner diameter of the large-diameter cylindrical portion. By being set slightly larger than the inner diameter by a predetermined dimension, the operation of attaching the plug bar to the housing and the turning operation are facilitated. In addition, by setting the wall thickness of the male screw portion for fastening to a wall thickness equivalent to the wall thickness of the fastening portion (particularly, by setting the minimum wall thickness to be the same as the wall thickness of the fastening portion), The fastening male screw part can ensure the mechanical strength that can reliably withstand the load from the tightening part, and it will surely cause cracks, cracks and other damage at the minimum wall thickness part at the valley part of the screw thread. Can be prevented.

  In addition to the effect of any one of claims 1 to 3, the resin water stop valve cartridge according to claim 6 is characterized in that the wall thickness of the thinnest valley portion formed between the screw threads of the fastening male screw portion is the wall. The thickness can be secured, and a large mechanical strength that can sufficiently withstand a large tightening force from the tightening portion can be secured. In addition to this, the cylindrical portion continuously formed integrally with the other end in the axial direction of the fastening male screw portion is the boundary line position with the fastening male screw portion, that is, the screw thread of the fastening male screw portion is helically terminated. Since it is extended in the axial direction from a position immediately after the position to perform, it is easy to secure the necessary volume.

  In addition to the effect of any one of claims 1 to 3, the resin water stop valve cartridge according to claim 7 includes the inner peripheral surface of the short cylindrical portion of the cylindrical portion and the step surface of the stopper rod. An accommodation space for closely accommodating the drive panel is formed.

  In addition to the effect of the seventh aspect, the resin water stop valve cartridge according to the eighth aspect can secure the flow rate of the movable disk at a sufficiently large value and can reliably move the driving force of the plug bar drive panel. Can be transmitted to the disc.

FIG. 1 is a front view showing a water stop valve cartridge according to an embodiment of the present invention. FIG. 2 is a plan view showing a water stop valve cartridge according to an embodiment of the present invention. FIG. 3 is a bottom view showing a water stop valve cartridge according to an embodiment of the present invention. 4A and 4B show a water stop valve cartridge housing according to an embodiment of the present invention, in which FIG. 4A is a front view, FIG. 4B is a cross-sectional view taken along line A-A in FIG. is there. FIG. 5 is a plan view of the housing of the water stop valve cartridge according to the embodiment of the present invention. 6 is a cross-sectional view taken along the line B-B in FIG. 5 showing the housing of the water stop valve cartridge according to the embodiment of the present invention, and shows an essential part enlarged in a circle indicated by a one-dot chain line. FIG. 7 is a cross-sectional view taken along the line CC of FIG. 5 showing the water stop valve cartridge housing according to the embodiment of the present invention, and the main part is shown enlarged in a circle indicated by a one-dot chain line. FIG. 8 shows a cap of a water stop valve cartridge housing according to an embodiment of the present invention, wherein (a) is a plan view, (b) is a sectional view, (c) is a side view, and (d) is a bottom view. It is. FIG. 9 shows a stopper rod of a water stop valve cartridge according to an embodiment of the present invention. (A) shows a side view (left half) of the stopper rod on the left side of the alternate long and short dash line, and the stopper rod on the right side. Sectional drawing (right half part) is shown, (b) shows a front view of the stopper rod. FIG. 10 shows a stopper rod of a water stop valve cartridge according to an embodiment of the present invention, wherein (a) is a plan view and (b) is a bottom view. FIG. 11 shows a movable disk of a valve member of a water stop valve cartridge according to an embodiment of the present invention, (a) is a bottom view, (b) is a side view showing the bottom face as an upper side, and (c) is a plan view. It is. 12A and 12B show a fixed disk for a valve member of a water stop valve cartridge according to an embodiment of the present invention. FIG. 12A is a bottom view, FIG. 12B is a side view showing the bottom surface as an upper side, and FIG. ) Is a cross-sectional view seen from a side view, and FIG. FIG. 13 is an exploded perspective view showing the water stop valve cartridge according to one embodiment of the present invention as viewed from one end side (tightening portion side). FIG. 14 is an exploded perspective view showing the water stop valve cartridge according to one embodiment of the present invention as viewed from the other end side (cap side). FIG. 15 is a perspective view showing a water stop valve cartridge according to an embodiment of the present invention. FIG. 16 is a front sectional view showing a water stop valve cartridge according to an embodiment of the present invention. FIG. 17 is a side sectional view showing a water stop valve cartridge according to an embodiment of the present invention. FIG. 18 shows a state when the water stop valve cartridge according to one embodiment of the present invention is closed, (a) is a perspective view showing an appearance of the water stop valve cartridge, and (b) is a view inside the water stop valve cartridge. FIG. 7 is a perspective view showing a rotating state (fully closed state) and a rotating angle position (fully closed angle position) of the movable disk, and (c) is a cross-sectional view showing a water flow state (blocking state) in the water stop valve cartridge. FIG. 19 shows a state when the water stop valve cartridge according to one embodiment of the present invention is opened, (a) is a perspective view showing an appearance of the water stop valve cartridge, and (b) is a view inside the water stop valve cartridge. FIG. 5 is a perspective view showing a rotating state (fully opened state) and a turning angle position (fully opened angle position) of the movable disk, and FIG. 5C is a cross-sectional view showing a water flow state (fully opened state) in the water stop valve cartridge. FIG. 20 is a cross-sectional view of the attachment portion for schematically explaining an attachment portion (such as a handle portion of a water tap) to which the water stop valve cartridge according to one embodiment of the present invention is attached. FIG. 21 shows a state in which the housing of the water stop valve cartridge according to one embodiment of the present invention is inserted and attached through the upper opening of the attachment portion, and the attachment portion is the same sectional view as FIG. A side view of the water stop valve cartridge is shown. FIG. 22 shows a state in which the handle portion of the water tap is fixed to the upper end portion of the stopper rod of the water stop valve cartridge after the housing of the water stop valve cartridge according to one embodiment of the present invention is attached to the mounting portion. The mounting section is the same cross-sectional view as FIG. 20, and the water stop valve cartridge is a side view. FIG. 23 is a plan view of the handle portion for explaining a rotation angle range of the handle portion attached to the water stop valve cartridge according to the embodiment of the present invention.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted.

[overall structure]
As shown in FIGS. 1 to 3, the resin water stop valve cartridge according to the present embodiment includes a housing 10 having a stepped cylindrical similar appearance as a whole, and a cap 20 attached to the lower end of the housing 10. And a plug rod 30 that is inserted and mounted along the axial center from one axial end of the housing 10, and is mounted on the other axial end of the housing 10 at the tip (the other axial end) of the plug rod 30. And a valve member 40 that is driven and connected. The housing 10 has a predetermined shape (predetermined inner / outer shape and predetermined cross-sectional shape) made of a synthetic resin having a relatively high strength in the synthetic resin material, preferably a polyphenylene sulfide (PPS) resin. The molding is preferably performed by an injection molding technique using a predetermined mold joining technique. In addition, the cap 20 is integrally formed by a predetermined molding technique so that all parts are formed in a predetermined shape (predetermined inner / outer shape and predetermined cross-sectional shape) from the same synthetic resin as that of the housing 10, preferably polyphenylene sulfide (PPS) resin. Is formed. The cap 20 can be integrally formed by an injection molding technique using a joining mold, but has a relatively simple structure compared to the housing 10 and is a normal mold (not a joining mold). Since the molding can be performed by the above-mentioned method, and the mechanical strength and the like are less demanding than the housing 10, the molding may be performed integrally by a normal injection molding technique. Further, the stopper rod 30 is a synthetic resin in which all parts have a relatively low coefficient of friction in the synthetic resin material (particularly, a synthetic resin having a relatively low frictional resistance at the contact surface of the molded article), preferably It is integrally formed from polyacetal resin (POM), is inserted from one axial end of the housing 10 and extends in the axial direction of the housing 10.

[Housing 10]
<Tightening part>
As shown in FIG. 4, the housing 10 is formed by injection molding the predetermined synthetic resin material so that the fastening portion 11, the large diameter cylindrical portion LC, and the small diameter cylindrical portion SC extend coaxially (the large diameter cylindrical portion). It is integrally molded so as to be stepped at the LC portion, and is a stepped cylindrical integral molded product of the predetermined shape. Specifically, as shown in FIG. 5, the tightening portion 11 has a hexagonal nut shape with a predetermined outer diameter, and has a predetermined thickness (a height direction dimension in FIG. The hexagon nut is integrally formed with the “m dimension (reference dimension)”. In the present embodiment, the “reference outer diameter” of the tightening portion 11 corresponds to the distance between two opposing sides of the hexagon, that is, the “s dimension (reference dimension)” of a general hexagon nut. The “maximum outer diameter” is the distance between the vertices of two opposite corners of the hexagon, that is, the diameter corresponding to the “e dimension (reference dimension)” of a general hexagon nut. That means. As shown in FIG. 6, a columnar through-hole 11 a that penetrates with a circular cross section having a predetermined diameter is formed at the center of the tightening portion 11 so as to extend in the axial direction. Accordingly, the tightening portion 11 has a wall thickness equal to the distance between the hexagonal outer peripheral surface (outer wall surface) and the through hole 11a. That is, the tightening portion 11 has a wall thickness (wall thickness shown in cross section in FIG. 6) equal to the distance between each of the six outer wall surfaces (each side of the hexagon) and the through hole 11a.

<Large diameter cylindrical part>
The large-diameter cylindrical portion LC has a short cylindrical shape that extends from the other axial end of the tightening portion 11 (the lower end in FIG. 4) by a predetermined short axial length, and the mounting male screw portion 12 is provided at one axial end. A flange portion 14 is provided at the other axial end portion, and a concave groove portion 13 is provided between the mounting male screw portion 12 and the flange portion 14. That is, the large-diameter cylindrical portion LC is integrally arranged so that the mounting male screw portion 12, the concave groove portion 13, and the flange portion 14 extend coaxially. The large-diameter cylindrical portion LC has a cylindrical shape with a predetermined outer diameter that is integrally formed with the central portion in the axial direction of the housing 10 so as to be coaxial with the tightening portion 11.

  Specifically, the male screw portion 12 for mounting is integrally formed with a male screw having a predetermined screw thread height at a predetermined pitch on the outer peripheral surface of a short cylindrical body having a predetermined outer diameter larger than the outer diameter of the tightening portion 11. Is. The maximum outer diameter of the mounting male screw portion 12 (the outer diameter of the apex portion of the screw thread) and the outer diameter of the flange portion 14 are the same. Furthermore, the maximum outer diameter of the mounting male screw portion 12 (and the outer diameter of the flange portion 14) is set larger than the outer diameter of the tightening portion 11 by a predetermined dimension. Thereby, a stepped surface having a dimension corresponding to a dimensional difference between the outer dimension of the tightening portion 11 and the outer diameter of the mounting male screw portion 12 is provided between the tightening portion 11 and the mounting male screw portion 12. Is formed. This step surface has a substantially ring shape in which the outer peripheral shape is the same circular shape as the outer peripheral surface shape of the mounting male screw portion 12 and the inner peripheral shape is the same regular hexagon as the outer peripheral surface shape of the tightening portion 11. . The recessed groove portion 13 is a circular groove, and its outer diameter is set smaller than the maximum outer diameter of the mounting male screw portion 12 (and the outer diameter of the flange portion 14) by a predetermined dimension. The outer diameter of the part 11 is larger by a predetermined dimension. In the present embodiment, the reference outer diameter of the large-diameter cylindrical portion LC refers to the outer diameter of the mounting male screw portion 12 (and the outer diameter of the flange portion 14).

  The inner peripheral surface of the large-diameter cylindrical portion LC is a smooth inner peripheral surface without a step, and the inner diameter thereof is larger than the inner diameter of the inner peripheral surface of the tightening portion 11 (that is, the diameter of the through hole 11a) by a predetermined dimension. It is said that. That is, the inner diameter of the mounting male screw portion 12, the inner diameter of the recessed groove portion 13, and the inner diameter of the flange portion 14 are all the same, and are larger than the inner diameter of the tightening portion 11 by a predetermined dimension. As a result, as shown in FIGS. 4C, 6 and 7, between the inner peripheral surface of the tightening portion 11 and the inner peripheral surface of the large-diameter cylindrical portion LC, that is, the through-hole 11a and the mounting male. A step surface 19 is formed between the inner peripheral surface of the screw portion 12, the recessed groove portion 13 and the flange portion 14. The step surface 19 has a circular ring shape with a dimension corresponding to the inner diameter dimension difference between the inner diameter dimension of the tightening portion 11 and the inner diameter dimension of the large-diameter cylindrical portion LC. That is, the stepped surface 19 has a circular shape whose inner peripheral shape and inner diameter are the same as the shape and diameter of the inner peripheral surface of the tightening portion 11, and the outer peripheral shape and outer shape are the shape of the inner peripheral surface of the large-diameter cylindrical portion LC and The circle is the same as the diameter. Thereby, the large-diameter cylindrical portion LC has a thickness (wall thickness) equal to the dimensional difference between the outer diameter and the inner diameter. That is, in the large-diameter cylindrical portion LC, the minimum wall thickness is the wall thickness at the concave groove portion 13 portion, and the maximum wall thickness is the wall thickness at the flange portion 14 portion. In the male screw portion 12 for mounting, the wall thickness at the valley portion of the screw thread is the same as the wall thickness of the recessed groove portion 13 (minimum wall thickness), and the wall thickness at the apex portion of the screw thread is the flange portion 14. Same as wall thickness (maximum wall thickness).

<Small diameter cylindrical part>
The small-diameter cylindrical portion SC has a cylindrical shape extending by a predetermined axial length from the other axial end of the large-diameter cylindrical portion LC, that is, the other axial end of the flange portion 14 (lower end in FIG. 4). A fastening male screw portion 15 is provided, and a concave groove portion 15a is provided between the fastening male screw portion 15 and the flange portion 14 of the large-diameter cylindrical portion LC. The other end side from the fastening male screw portion 15 of the small diameter cylindrical portion SC is a cylindrical portion 16 having a simple cylindrical shape. That is, the small-diameter cylindrical portion SC is formed by integrally arranging the concave groove portion 15a, the fastening male screw portion 15, and the cylindrical portion 16 so as to extend coaxially. In this way, the small diameter cylindrical portion SC is coaxial with the tightening portion 11 and the large diameter cylindrical portion LC, and has a smaller diameter than the large diameter cylindrical portion LC. A cylindrical shape with a predetermined outer diameter is formed integrally on the end side.

  Specifically, the outer peripheral surface of the outer peripheral surface of the small-diameter cylindrical portion SC excluding the fastening male screw portion 15 is a smooth outer peripheral surface, and the outer diameter of the smooth outer peripheral surface (that is, the outer diameter of the concave groove portion 15a). And the outer diameter of the cylindrical portion 16) have a reference outer diameter of the large-diameter cylindrical portion LC, that is, an outer diameter smaller than the maximum outer diameter of the mounting male screw portion 12 and the outer diameter of the flange portion 14 by a predetermined dimension. The size is larger than the reference outer diameter of the tightening portion 11 and smaller than the maximum outer diameter of the tightening portion 11. That is, the outer diameter of the small-diameter cylindrical portion SC is set to a size within the range of the reference outer diameter and the maximum outer diameter of the tightening portion 11 except for the fastening male screw portion 15 portion. Further, the fastening male screw portion 15 is formed by integrally forming a male screw having a predetermined screw thread height on the smooth outer peripheral surface of the small-diameter cylindrical portion SC having an outer diameter so as to have a predetermined pitch. The outer diameter is smaller than the outer diameter by a predetermined dimension. Furthermore, the maximum outer diameter of the fastening male screw portion 15 (the outer diameter of the top portion of the screw thread) is larger than the reference outer diameter of the tightening portion 11 and is almost the same as the maximum outer diameter of the tightening portion 11. Or slightly larger. The fastening male screw portion 15 is formed over the entire width (total axial length) of the fastening male screw portion 15 at a screw pitch (and a larger lead angle) than that of the mounting male screw portion 12 and is fastened. The screw thread height of the male screw part 15 is set to be larger than the screw thread height of the mounting male screw part 12.

  The concave groove portion 15a is a circular groove for mounting an O-ring, and is located between the flange portion 14 of the large diameter cylindrical portion LC and the male screw portion 15 for fastening (the base end portion to the shaft of the small diameter cylindrical portion SC). (One end in the direction). As described above, the outer diameter of the recessed groove portion 15a is the same as the outer diameter of the smooth outer peripheral surface of the small-diameter cylindrical portion SC, and the outer diameter of the small-diameter cylindrical portion SC is the same for all portions except the fastening male screw portion 15. The outer diameter of the smooth outer peripheral surface. Then, the small-diameter cylindrical portion SC has a width dimension of the concave groove portion 15a from its base end (boundary line with the flange portion 14), and the fastening male screw portion 15 is placed adjacent to the concave groove portion 15a. The cylindrical portion 16 is provided so as to have a predetermined axial length adjacent to the fastening male screw portion 15 while being provided with a width size (a width size corresponding to the pitch).

  The inner diameter of the inner peripheral surface of the small-diameter cylindrical portion SC is set to the same diameter as the inner diameter of the inner peripheral surface of the large-diameter cylindrical portion LC in the concave groove portion 15a and the fastening male screw portion 15. Accordingly, the center of the housing extends in the axial direction from one end of the large diameter cylindrical portion LC to the other end of the fastening male screw portion 15 of the small diameter cylindrical portion SC (from the through hole 11a of the tightening portion 11). An insertion hole is formed. On the other hand, the inside diameter of the small-diameter cylindrical portion SC is the portion other than the recessed groove portion 15a and the fastening male screw portion 15, that is, the cylindrical portion 16 portion on the distal end side or the other axial end side of the fastening male screw portion 15. Then, the diameter is set to be larger by a predetermined dimension than the inner diameter of the inner peripheral surface of the large-diameter cylindrical portion LC. Accordingly, a step surface 18 is formed between the fastening male screw portion 15 and the cylindrical portion 16 (boundary line position) on the inner peripheral surface of the small diameter cylindrical portion SC. The step surface 18 has a circular ring shape having a dimension corresponding to the inner diameter dimension difference between the inner diameter dimension of the continuous concave groove portion 15 a and the fastening male screw portion 15 and the inner diameter dimension of the cylindrical portion 16. That is, the stepped surface 18 has a circular shape whose inner peripheral shape and inner diameter are the same as the inner peripheral surface shape and diameter of the fastening male screw portion 15, and the outer peripheral shape and outer shape are the inner peripheral surface on the proximal end side of the cylindrical portion 16. The shape is the same as the surface shape and diameter.

  As a result, the small-diameter cylindrical portion SC has a plurality of thicknesses (wall thicknesses) equal to the dimensional difference between the outer diameter and the inner diameter, and the positions of the different wall thicknesses on the inner peripheral surface (the fastening male screw portion 15 and the cylinder). At the boundary position with the portion 16, a stepped cylindrical shape is provided with a stepped surface 18 corresponding to the wall thickness difference. Also, as shown in FIGS. 6 and 7, in the fastening male screw portion 15 portion, the wall thickness at the valley portion of the screw thread 15x is the same as the wall thickness of the concave groove portion 15a (minimum wall thickness), and the screw thread 15x. The wall thickness at the apex portion is larger than the wall thickness of the recessed groove portion 15a by the height of the thread 15x of the thread 15x (maximum wall thickness). That is, as shown in FIG. 6, the wall thickness ST of the fastening male screw portion 15 is the minimum wall thickness ST1 (wall thickness of the valley portion) of the enlarged view (upper enlarged view) indicated by the alternate long and short dash line in FIG. It consists of the maximum wall thickness ST2 (the wall thickness of the peak portion).

  That is, the small-diameter cylindrical portion SC has the maximum wall thickness at the concave groove portion 15a and the fastening male screw portion 15 portion, and the minimum wall thickness at the cylindrical portion 16 portion. The fastening male screw portion 15 having the maximum wall thickness in the small-diameter cylindrical portion SC is screwed into the corresponding female screw portion to be attached. At this time, the fastening portion 11 is tightened with a tool such as a wrench. Since the fastening male screw portion 15 is screwed together, a large tightening force is applied to the fastening male screw portion 15. Therefore, the fastening male screw portion 15 has a structure for securing a sufficient mechanical strength against such a large fastening force (particularly, the minimum wall thickness ST1 portion of the valley portion of the screw thread 15x is subjected to a load at the time of fastening. The wall thickness ST is large enough to ensure sufficient mechanical strength. The cylindrical portion 16 having the smallest wall thickness in the small-diameter cylindrical portion SC has a circular opening at the tip (the other end in the axial direction) serving as an opening through which raw water from the water supply source flows, and accommodates a ceramic disk as the valve member 40. For this purpose, the internal space of the cylindrical portion 16 becomes a water passage space for raw water from the water supply source. Accordingly, the cylindrical portion 16 has a structure for securing a volume for obtaining a sufficient amount of flowing water and a mechanical strength sufficient to withstand the pressure applied to the cylindrical portion 16 by the water pressure applied to the valve member (that is, flowing water). It has a large inner diameter that can secure a volume larger than the necessary volume for securing the amount, and a small wall thickness that can secure a minimum strength that can withstand the load caused by water pressure.

  Further, the short cylindrical concave groove portion 15a constituting the proximal end portion of the small diameter cylindrical portion SC together with the fastening male screw portion 15 is the minimum wall thickness ST1 of the fastening male screw portion 15 (reference wall thickness of the small diameter cylindrical portion SC). Is formed integrally with the base end side of the fastening male screw portion 15 with the same wall thickness as the concave groove portion 15a, which is a short cylindrical body with a large wall thickness, applies a load applied to the fastening male screw portion 15 to the base end. While supporting on the side, part of the load is absorbed. Therefore, it is possible to more effectively prevent the fastening male screw portion 15 from being damaged by the load applied to the fastening male screw portion 15 from the fastening portion 11 when the housing 10 is mounted. In particular, when the housing 10 is inserted and attached to an attachment target, an O-ring OR is attached to the recessed groove portion 15a, and the O-ring OR is located at a position closest to the female screw portion to be attached (opening end side from the female screw portion). The inner peripheral wall portion) is elastically contacted so as to maintain watertightness, and the concave groove portion 15a can elastically absorb the load from the fastening male screw portion 15 via the O-ring OR, and the fastening male screw portion. Can be more effectively prevented.

  Further, while the inner diameter of the fastening male screw portion 15 is set to be larger than the inner diameter of the fastening portion 11 by a predetermined dimension, the wall thickness ST of the fastening male screw portion 15 is equal to the wall thickness of the fastening portion 11. The wall thickness is set. Specifically, the wall thickness ST of the fastening male screw portion 15 is substantially equal to the wall thickness of the tightening portion 11 even at the minimum wall thickness ST1, and the wall thickness of the tightening portion 11 at the maximum wall thickness T2 portion. The wall thickness is slightly larger than the thickness. This is because the inner diameter of the fastening male screw portion 15 is set to be the same as the inner diameter of the large-diameter cylindrical portion LC, and is set slightly larger than the inner diameter of the tightening portion 11 by a predetermined dimension, so The outer diameter of the large-diameter cylindrical part LC is set to be larger than the outer diameter of the tightening part 11 by a predetermined dimension while exhibiting the effect of facilitating the rotation operation. The outer diameter of the fastening male screw portion 15 of the small-diameter cylindrical portion SC that is smaller than the LC is set to be smaller than the outer diameter of the large-diameter cylindrical portion LC by a predetermined dimension, and only a predetermined dimension from the outer diameter of the tightening portion 11. This is because the wall thickness ST of the fastening male screw portion 15 is set to a large wall thickness due to the dimensional difference in the outer diameter (enlarged outer diameter dimension). In other words, the cylindrical body of the housing portion of the housing 10 that accommodates the plug rod 30 is compared with the case where the large-diameter cylindrical portion LC and the small-diameter cylindrical portion SC having a certain degree of outer diameter difference as in the present embodiment are not configured. Thus, the outer peripheral surface position of the fastening male screw portion 15 is displaced (shifted) outward corresponding to the outer peripheral surface position of the large diameter cylindrical portion LC. The wall thickness ST of the fastening male screw portion 15 can be increased by an amount corresponding to the displacement according to the outer diameter of the LC.

  That is, in the fastening male screw portion 15 having a short cylindrical shape (a male screw is spirally formed on the outer peripheral surface of the short cylindrical body), the screw thread 15x of the male screw is connected to the fastening male screw portion 15. Spiral start from one axial end (boundary position with the concave groove portion 15a), and spiral end at the other axial end of the fastening male screw portion 15 (boundary position with the cylindrical portion 16). Since all the portions where the screw threads 15x are arranged are set to the large wall thickness ST, the wall thickness ST1 is naturally ensured by the thickness of the thinnest valley portion formed between the screw threads 15x. It is possible to secure a large mechanical strength that can sufficiently withstand a large tightening force from the tightening portion 11. In addition to this, the cylindrical portion 16 continuously formed integrally with the other end in the axial direction of the fastening male screw portion 15 is a boundary line position with the fastening male screw portion 15, that is, the screw of the fastening male screw portion 15. Since the mountain 15x extends in the axial direction from a position immediately after the position where the spiral ends, the necessary volume can be easily secured. That is, a portion of the cylindrical portion 16 adjacent to the fastening male screw portion 15 is not provided with a large wall thickness portion equivalent to the fastening male screw portion 15, and the cylindrical portion 16 having a small wall thickness is provided with the fastening male screw portion 15. It is configured to start immediately after the screw portion 15. Thus, the small-diameter cylindrical portion SC has only the fastening male screw portion 15 (and preferably the concave groove portion 15a that reinforces the fastening male screw portion 15 on the base end side) that requires high mechanical strength. The large wall thickness ST is not required, and a large mechanical strength is not required. Conversely, the entire cylindrical portion 166 requiring a large volume is set to the small wall thickness.

  Further, when the housing 10 is mounted on the mounting target, the load due to the tightening force (tightening torque) applied to the male screw portion 15 that is screwed into the female screw portion to be mounted is tightened from the tool. Although it corresponds to the tightening force (tightening torque) applied to the portion 11, the wall thickness ST of the fastening male screw portion 15 is set to be equal to the wall thickness of the fastening portion 11 as described above. (In particular, by setting the minimum wall thickness ST1 to be equal to the wall thickness of the tightening portion 11 as described above), the fastening male screw portion 15 is surely applied to the load from the tightening portion 11. It is possible to secure the mechanical strength to withstand, and it is possible to reliably prevent breakage such as cracks and cracks at the minimum wall thickness ST1 portion at the valley portion of the screw thread 15x. Here, when the water stop valve cartridge of the present embodiment is used for a general water tap application, the tightening portion 11 of the housing 10 has a reference outer diameter of about 17 mm and a wall thickness of about 4 mm to about 4 mm. On the other hand, the small diameter cylindrical portion SC has an outer diameter in the range of about 18 mm to about 19 mm, and the fastening male screw portion 15 has a wall thickness ST in the range of about 4 mm to about 5 mm (minimum). Preferably, the wall thickness ST1 is about 4 mm and the maximum wall thickness ST2 is about 5 mm.

  As described above, the small-diameter cylindrical portion SC has the base end portion including the fastening male screw portion 15 (that is, the concave groove portion 15a and the fastening male screw portion 15 portion) as a large wall thickness cylindrical portion having a large wall thickness. In addition to ensuring the maximum mechanical strength, it is easy to ensure dimensional accuracy and improve finishing accuracy during manufacturing. Further, the small-diameter cylindrical portion SC has an internal space in which a cylindrical portion 16 other than the base end portion including the fastening male screw portion 15 (from the central portion to the distal end portion) is used as a small wall thickness cylindrical portion having a very small wall thickness. In particular, the opening area of the two elements (opening area and height) that determine the volume is ensured to the maximum. Here, when the water stop valve cartridge of the present embodiment is used for a general water faucet application, the wall thickness of the cylindrical portion 16 of the small diameter cylindrical portion SC of the housing 10 is equal to the wall thickness ST of the fastening male screw portion 15. The wall thickness ST of the fastening male screw portion 15 is preferably about 4 mm for the minimum wall thickness ST1 and about 5 mm for the maximum wall thickness ST2 (that is, the screw). When the height of the mountain is about 1 mm), the wall thickness of the cylindrical portion 16 is preferably about 1 mm.

  In the cylindrical portion 16 of the small-diameter cylindrical portion SC, the cylindrical portion is located at a position (downward position in FIG. 1) axially separated from the boundary position (position of the stepped surface 18) with the fastening male screw portion 15 by a predetermined distance. The water outlets 16a are formed so as to be symmetrically arranged at angular positions opposed to each other by 180 degrees in the circumferential direction. Each of the pair of water outlets 16a is extended in the circumferential direction of the cylindrical portion 16 so as to have an arc shape with a predetermined angle range (a range of about 90 degrees). Thereby, also in the cylindrical part 16, the wall part between a pair of water outlets 16a is symmetrically arranged, each having an angle range of about 90 degrees. Further, the width dimension (height dimension in FIG. 4) of each water outlet 16 a is set to the same width dimension as the thickness of a movable disk 41 described later in the valve member 40. Further, the position where the water outlet 16a is arranged, that is, the separation distance H1 from the boundary position with the fastening male screw portion 15 shown in the enlarged view in the one-dot chain line in FIG. The position is as close as possible to the position (position of the stepped surface 18), and preferably a distance smaller than the width dimension of the water outlet 16a (for example, a distance of about ½ of the width dimension of the water outlet 16a). For example, when the water stop valve cartridge of the present embodiment is used for a general water tap application, the width dimension of the water outlet 16a of the cylindrical portion 16 is about 3 mm to about 4 mm (preferably about 3.5 mm). The position of the water outlet 16a is preferably about 1.5 mm from the boundary position with the fastening male screw portion 15.

  Here, the short cylindrical part (the part from the boundary line with the fastening male screw part 15 to the upper side position of the water outlet 16a) on the base end side of the water outlet 16a of the cylindrical part 16 is the valve member 40 described later. It accommodates a disk-shaped drive board 37 of the stopper rod 30 that is drivingly connected to the movable disk 41. Therefore, the inner circumferential surface of the short cylindrical portion of the cylindrical portion 16 and the stepped surface 18 form an accommodation space for closely accommodating the drive board 37 of the plug bar 30. The storage space is a disk-shaped storage space having the same very small thickness as the distance H1 between the fastening male screw portion 15 and the water outlet 16a of the cylindrical portion 16.

  Further, the predetermined length portion on the distal end side of the cylindrical portion 16 is the wall thickness of the cylindrical portion 16 (reference wall of the cylindrical portion 16), as shown in the enlarged view within the alternate long and short dash line in FIG. A thin wall portion 16b having a wall thickness smaller than (thickness), and between the base end of the thin wall portion 16b of the cylindrical portion 16 and a portion other than the thin wall portion 16b (the reference wall thickness portion), a corresponding circular ring shape A step surface 17 is formed. In addition, a circular ring-shaped locking projection 16c that protrudes inward at a minute height is provided at the tip of the thin portion 16b over the entire circumference of the circular opening formed by the inner peripheral surface of the lower end of the cylindrical portion 16. Are integrally formed.

  Further, as shown in FIGS. 4C, 6, and 7, the guide members are respectively provided on the inner peripheral surface of the cylindrical portion 16 at angular positions that are opposed to each other by 180 degrees in the circumferential direction of the cylindrical portion 16. A stop groove 17a is formed. The pair of guide locking grooves 17a are linearly extended from the step surface 17 to the left and right center position of the lower side of the water outlet 16a along the axial direction of the cylindrical portion 16, respectively. The groove bottom surface of the guide locking groove 17a is disposed at a depth position that coincides with the inner peripheral surface of the thin portion 16b of the cylindrical portion 16. That is, the guide locking groove 17a is formed from the inner peripheral surface of the cylindrical portion 16 to a depth position coinciding with the inner peripheral surface of the thin portion 16b, and the groove bottom surface and the inner peripheral surface of the thin portion 16b are flush with each other. It has become.

  Further, as shown in FIGS. 6 and 7, rotation restricting protrusions 18 a are formed on the inner peripheral surface of the large-diameter cylindrical portion LC at angular positions that are 180 degrees apart and face each other in the circumferential direction. . The pair of rotation restricting projections 18a extend linearly from the other axial end of the flange portion 14 (lower end in FIG. 6) to the position of the step surface 19 along the axial direction of the large-diameter cylindrical portion LC. It has a protruding shape. Further, as shown in FIG. 4C, the rotation restricting protrusion 18a has a substantially trapezoidal planar shape and a cross-sectional shape that expands from the center side of the large-diameter cylindrical portion LC toward the inner peripheral surface, Both end surfaces in the width direction are flat surface-like movement restricting surfaces.

[Cap 20]
The cap 20 is detachably attached to a circular opening at the lower end of the small diameter cylindrical portion SC of the housing 10. Specifically, as shown in FIG. 8, the cap 20 includes a circular ring-shaped base portion 21, a circular ring-shaped insertion portion 22 having a slightly smaller diameter than the base portion 21, and a circular ring having a slightly smaller diameter than the insertion portion 22. And the concave groove portion 23 are integrally formed coaxially. The base portion 21 has a circular ring shape having an outer diameter that is the same as the outer diameter of the cylindrical portion 16 of the small diameter cylindrical portion SC, and an inner diameter that is substantially the same as or smaller than the inner diameter of the large diameter cylindrical portion LC. The insertion portion 22 has a circular ring shape having the same outer diameter as that of the thin portion 16 b formed at the lower end portion of the cylindrical portion 16 and the same outer diameter as that of the base portion 21. Furthermore, the recessed groove portion 23 is provided between the base portion 21 and the insertion portion 22 and has an outer diameter slightly smaller than that of the insertion portion 21, over the entire circumference in the vicinity of the center in the thickness direction of the cap 20. A circular ring-shaped concave groove is formed into which the locking protrusion 16c at the lower end of the housing can be fitted. That is, the concave groove portion 23 has a circular ring shape having the same outer diameter as the inner diameter of the locking projection 16 c and the same inner diameter as the base portion 21 and the insertion portion 22. Therefore, the inner peripheral surface of the base portion 21, the concave groove portion 23, and the insertion portion 22 that are integrally formed in the axial direction is a continuous cylindrical smooth inner peripheral surface that constitutes the inner peripheral surface of the cap 20, The peripheral surface constitutes a water passage hole 20a having a circular cross section. Further, a circular ring groove-like concave groove 21a is formed on the entire exposed surface (the lower surface in FIG. 8) of the base 21 in the other axial direction. Further, on the exposed surface (upper surface in FIG. 8) at one end in the axial direction of the base portion 21, a circular ring groove-shaped concave groove 22a is formed over the entire circumference. Corresponding O-rings OR are mounted in the concave groove 21a of the base portion 21 and the concave groove 22a of the insertion portion 22, respectively.

  As shown in FIGS. 16 and 17, the cap 20 is inserted into a space of a predetermined axial length portion above the thin portion 16 b in the internal space of the cylindrical portion 16 of the housing 10. The recessed groove portion 23 is inserted into the thin portion 16b. At this time, the cap 20 is detachably fixed to the lower end of the housing 10 by fitting and locking the concave groove portion 23 of the cap 20 to the locking protrusion 16c of the thin portion 16b. . Further, at this time, one side surface in the thickness direction of the base portion 21 of the cap 20 (the surface on the concave groove portion 23 side) is in contact with the tip end surface (opening end surface) of the cylindrical portion 16, and the outer peripheral surface of the base portion 21 is the cylindrical portion. It is designed to be flush with the 16 outer peripheral surfaces. Further, at this time, the water passage hole 20 a at the center of the cap 20 communicates with the internal space of the cylindrical portion 16.

[Plug bar 30]
The stopper rod 30 is inserted into the inside through a circular opening at the lower end of the small-diameter cylindrical portion SC of the housing 10, and the engaging portion 31 at the upper end protrudes outside from the through hole 11 a of the tightening portion 11 of the housing 10. Specifically, as shown in FIG. 9, the plug rod 30 is formed integrally with a cylindrical engagement portion 31 and a cylindrical insertion portion 32, and at the distal end portion of the insertion portion 32, a restriction projection 33 and a flange portion. 34 and the flange portion 35 are integrally formed, and a driving board 37 is integrally formed at the distal end of the insertion portion 32 via a holding portion 36. In addition, a pair of engaging protrusions 38 are integrally formed on the driving board 37. It is a thing. The engaging portion 31, the insertion portion 32, the flange portion 34, the flange portion 35, the holding portion 36, and the drive panel 37 are all arranged coaxially.

  Specifically, as shown in FIGS. 16 to 17, the engaging portion 31 has a predetermined shaft in which a plurality of grooves extending in the axial direction are uniformly formed in the circumferential direction by performing spline processing on the outer peripheral surface of the cylindrical body. It has a long cylindrical shape. The engaging portion 31 has a cylindrical shape whose upper end is opened as a circular opening. Further, the outer diameter of the engaging portion 31 (the diameter connecting the vertices of the ridges formed by spline processing) is slightly smaller than the through hole 11a of the tightening portion 11 of the housing 10 (precisely, a small diameter in a comma millimeter unit). It is said that. The engaging portion 31 is inserted into the through hole 11a of the tightening portion 11 from the lower end opening of the housing 10, and then the entire length projects outward (upward in FIG. 18) at the center portion of the tightening portion 11. It is supposed to be exposed.

  The insertion portion 32 has an outer diameter that is the same as the outer diameter of the engagement portion 31 and has a cylindrical shape having a predetermined axial length. The insertion portion 32 has a cylindrical shape whose lower end is opened as a circular opening. Further, the axial length of the insertion portion 32 (the distance from the base end of the insertion portion 32 to the lower surface of the drive board 37 at the lower end) is from the opening end (the upper end in FIG. 16) that is one end of the tightening portion 11 of the housing 10. The length extends to the other end (lower end in FIG. 16) of the fastening male screw portion 15 of the small diameter cylindrical portion SC. Further, the insertion portion 32 has the same outer diameter as the engaging portion 31, that is, an outer diameter slightly smaller than the diameter of the through hole 11 a of the tightening portion 11 of the housing 10 (precisely, a diameter smaller in the comma unit). is doing. The insertion portion 32 is inserted into the through hole 11 a of the tightening portion 11 from the lower end opening of the housing 10, and the entire length thereof is accommodated inside the housing 10. That is, the insertion portion 32 has a portion on one end side in the axial direction (a length portion corresponding to the through hole 11a of the tightening portion 11) that is slidable and rotatable in the through hole 11a of the tightening portion 11. The other axially other end portion that is disposed in contact is slidably inserted into the large diameter insertion hole of the large diameter cylindrical portion LC and the small diameter cylindrical portion SC.

  A circular fitting groove 31 a is formed over the entire circumferential direction between the engaging portion 31 and the insertion portion 32 of the plug rod 30. As shown in FIGS. 13 to 15, the stopper rod 30 is inserted in the state where the stopper rod 30 is inserted from the other end opening of the housing 10 and the entire engaging portion 31 protrudes from the tightening portion 11 (completely inserted state). The fitting ring 31a is detachably fitted with an E-ring ER, and the E-ring ER comes into contact with one side surface (upper side surface in FIG. 1) of the tightening portion 11 so that the plug rod 30 is in the housing 10. It is designed to be fixed in a state where it is prevented from being pulled out.

  The flange portion 34 is located at a position corresponding to the other end of the flange portion 14 of the housing 10 in a state where the insertion portion 32 is completely inserted into the housing 10 (state of FIGS. 16 to 18) in the axial direction of the insertion portion 32. An overhang is formed. The flange portion 34 has an outer diameter slightly smaller than the diameter of the large-diameter insertion hole of the large-diameter cylindrical portion LC and the small-diameter cylindrical portion SC (exactly, a small diameter in a comma millimeter unit). In the completely inserted state, the outer peripheral surface of the flange portion 34 is in contact with or close to the inner peripheral surface of the corresponding position of the insertion hole of the large-diameter cylindrical portion LC so as to be slidable and rotatable.

  As shown in FIG. 10A, the restricting protrusions 33 are integrally formed on the outer peripheral surface of the insertion portion 32 at angular positions that are 180 degrees apart and face each other in the circumferential direction. Each of the pair of restricting protrusions 33 has a linear protrusion shape extending from one end face of the flange portion 34 toward one end in the axial direction of the insertion portion 32 by a predetermined length. Further, the length (axial dimension) of the restricting projection 33 is a length corresponding to the length (axial dimension) of the rotation restricting protrusion 18a provided on the large-diameter cylindrical portion LC of the housing 10. It is set to a dimension that is about 1 mm smaller). The width of the restricting protrusion 33 is set to be approximately the same as the diameter of the hole inside the cylindrical insertion portion 32. Further, the thickness of the restricting projection 33 (projecting dimension outward from the outer peripheral surface of the insertion portion 32) is the overhanging dimension of the flange portion 34 (projecting dimension outward from the outer peripheral surface of the insertion portion 32). The outer surface of the restricting projection 33 is flush with the outer peripheral surface of the flange portion 34. That is, the outer surface of the restricting protrusion 33 has a curved surface that is the same as the arc shape of the outer peripheral surface of the flange portion 34 in the width direction.

  The flange portion 35 is formed to project at a position corresponding to one end of the fastening male screw portion 15 of the housing 10 in a state where the insertion portion 32 is completely inserted into the housing 10. The flange portion 35 has an outer diameter slightly smaller than the diameter of the large-diameter insertion hole of the large-diameter cylindrical portion LC and the small-diameter cylindrical portion SC (exactly, a small diameter in a comma millimeter unit). In the completely inserted state, the outer peripheral surface of the flange portion 35 is in contact with or close to the inner peripheral surface of the corresponding position of the insertion hole of the small diameter cylindrical portion SC so as to be slidable and rotatable. A concave groove 33a for mounting an O-ring OR is formed between the flange portion 34 and the flange portion 35 that are spaced apart in the axial direction of the insertion portion 32 in this way.

  The holding portion 36 is formed in a ring plate shape that protrudes to a position corresponding to the other end of the fastening male screw portion 15 of the housing 10 in a state where the insertion portion 32 is completely inserted into the housing 10. The holding portion 36 has an outer diameter slightly smaller than the diameter of the large-diameter insertion hole of the large-diameter cylindrical portion LC and the small-diameter cylindrical portion SC (exactly, a small diameter in a comma millimeter unit). In the fully inserted state, the outer peripheral surface of the holding portion 36 comes into contact with or is close to the inner peripheral surface of the corresponding position of the insertion hole of the small diameter cylindrical portion SC so as to be slidable and rotatable. A concave groove 34a for mounting an O-ring OR is formed between the flange portion 35 and the holding portion 36 that are separated in the axial direction of the insertion portion 32 as described above.

  The drive board 37 has a disk shape having an outer diameter (exactly a diameter smaller in comma millimeters) slightly smaller than the inner diameter of the cylindrical part 16 of the small diameter cylindrical part SC, and its central part is fixed to the lower end of the insertion part 32. Are integrally formed. In a state where the insertion portion 32 is completely inserted into the housing 10, one side surface (the upper side surface in FIG. 16) of the drive panel 37 abuts on the step surface 18 of the small diameter cylindrical portion SC, and the outer peripheral surface of the drive panel 37 is The cylindrical portion 16 is in contact with or close to the inner peripheral surface of the cylindrical portion 16 so as to be slidable and rotatable. Further, the thickness of the drive panel 37 is the same as the dimension H1 between the step surface 18 of the small-diameter cylindrical part SC and the water outlet 16a, and the insertion part 32 is completely inserted into the housing 10 in FIG. In particular, as shown in the enlarged view in the alternate long and short dash line, the other side surface (the lower side surface in FIG. 16) of the drive panel 37 is positioned to overlap the upper side of the water outlet 16a.

  As shown in FIG. 10B, the engagement protrusions 38 are integrally formed at the outer peripheral edge portion of the other side surface of the drive panel 37 at angular positions facing each other with a spacing of 180 degrees in the circumferential direction. The pair of restricting protrusions 33 are disposed at positions at an angle of 90 degrees with respect to the pair of restricting protrusions 33. Further, the engagement protrusion 38 has a linear protrusion shape protruding from the other side surface of the drive panel 37 by a predetermined length in the thickness direction. Note that the protrusion length of the engagement protrusion 38 is set to a dimension slightly smaller than the width of the water outlet 16a of the housing 10 (a dimension smaller by about 1 mm to 1.5 mm). Further, the width of the engaging protrusion 38 (the dimension in the circumferential direction of the drive panel 37) is set to be substantially the same as the width of the restricting protrusion. Further, the thickness of the engagement projection 38 (the dimension in the radial direction of the drive panel 37) is set to a dimension that is approximately half the width of the protrusion from the outer peripheral surface of the insertion portion 32 of the drive panel 37. The engagement protrusion 38 is engaged with an engagement recess 41b of the movable disk 41 of the valve member 40, which will be described later, and drives and connects the tip of the plug rod 30 to the movable disk 41. The dimensions (axial length, width, thickness) are set to dimensions (dimensions slightly smaller in comma units) corresponding to the dimensions (axial length, width, thickness) of the engaging recess 41b of the movable disk 41. Further, the outer surface of the engagement protrusion 38 has a curved surface that is the same as the arc shape of the outer peripheral surface of the drive panel 37 in the width direction.

  Of the diameter of the plug rod 30 (see FIG. 10A), the diameter R1 of the engaging portion 31 and the insertion portion 32 corresponds to the diameter of the through hole 11a having the smallest diameter among the holes of the housing 10, The diameters R2 of the flange portions 34, 35 and the holding portion 36 are set to the diameters of the insertion holes of the large-diameter cylindrical portion LC having an intermediate diameter among the holes of the housing 10 (inner diameter CR of the large-diameter cylindrical portion LC shown in FIG. 6). Correspondingly, the diameter R3 of the drive board 37 corresponds to the diameter of the hole of the cylindrical portion 16 having the largest diameter among the holes of the housing 10.

  Before the cap 20 is attached to the lower end of the housing 10, one end side of the plug bar 30 is inserted into the inside from the lower end opening of the housing 10, and the engaging portion 31 protrudes from the tightening portion 11 as described above. Although fixed to the housing 10 by the E-ring ER, at this time, the O-ring OR attached to the concave groove 33a of the insertion portion 32 and the O-ring OR attached to the concave groove 34a serve as the large-diameter insertion hole of the housing. The stopper rod 30 is elastically contacted with the inner peripheral surface, and is fixed so as not to move in the radial direction of the large-diameter insertion hole of the housing 10, and the stopper rod 30 is configured to be rotatable in the forward and reverse directions. Yes. Further, when the plug bar 30 is rotated forward and backward, the side surfaces of the pair of restriction projections 33 of the plug bar 30 come into contact with the side surfaces of the pair of rotation restriction projections 18a of the large-diameter insertion hole of the housing 10, respectively. Thus, the stopper rod 30 is configured to be rotatable forward and backward within an angle range (within a range of about 90 degrees) of the pair of rotation restricting projections 18a.

[Valve member 40]
The valve member 40 is housed and accommodated in the internal space of the cylindrical portion 16 that is one axial end portion of the housing 10. Specifically, as shown in FIGS. 13 and 14, the valve member 40 includes a movable disk 41 made of a ceramic disk and a fixed disk 45 made of a ceramic disk. The movable disk 41 and the fixed disk 45 are accommodated in a fixed position on the other end side of the fastening male screw part 15 in the internal space of the small-diameter cylindrical part SC of the housing 10. Driven and connected to the distal end of the inserted plug rod 30 to be rotatable forward and backward, and cooperates with the fixed disk 45 to selectively open and close the valve in the cylindrical portion 16 of the small-diameter cylindrical portion SC. To do.

<Movable disc>
Specifically, as shown in FIG. 11, the movable disk 41 has two fan-shaped portions 41 x having a fan-shaped shape with a predetermined center angle (about 90 degrees) opposed to each other with an angle of 180 degrees. In a symmetrical arrangement, the central sides are connected to each other by a central portion 41y having a small plate shape having a predetermined size, thereby forming a predetermined different shape. On both sides in the width direction of the movable disk 41, a water-flow recess 41a having a substantially isosceles triangular shape or a fan shape is formed by opposing side surfaces (two side surfaces) of the two fan-shaped portions 41x and one side surface of the central portion 41y. ing. Each of the pair of water passage recesses 41a has a center angle (about 90 degrees) corresponding to the center angle of the fan-shaped portion 41x, and is symmetrically disposed in the movable disk 41 in a direction orthogonal to the pair of fan-shaped portions 41x. ing. The length of the central portion 41y (left and right dimensions in FIG. 11A) is set to be slightly smaller than the width of the engaging protrusion 38 of the plug rod 30, and the width of the central portion 41y (see FIG. 11). 11 (a) is set to be slightly smaller than the thickness of the engagement protrusion 38 of the plug rod 30. Further, the fan-shaped portion 41x and the central portion 41 have the same thickness, and both side surfaces in the thickness direction of the movable disk 41 are flat surfaces. In addition, the other side surface (upper surface in FIG. 11B) of the movable disk 41 in the use state is a polished surface, and has high smoothness and low frictional resistance.

  As shown in FIG. 17, the movable disk 41 is disposed in a space facing the thickness portion of the water outlet 16 a inside the cylindrical portion 16 of the housing 10. The same dimension as the width of the water outlet 16a. In addition, the maximum opening length of each water-flowing recess 41a (which forms a flat fan shape) of the movable disk 41 is a dimension between the corners of the two fan-shaped parts 41x facing each other on the one side of the movable disk 41. The opening length is set to a dimension equivalent to the length of the water outlet 16 a of the housing 10. Specifically, since the outer peripheral surface of the movable disk 41 is disposed close to the inner peripheral surface of the cylindrical portion 16, the maximum opening length of the water passage recess 41 a is on the inner peripheral surface side of the cylindrical portion 16. The size is set to be approximately the same as the length of the water outlet 16a.

  Further, in the outer peripheral portion (arc-shaped portion) of one side surface (side surface facing the drive board 37 in the use state) of the fan-shaped portion 41x of the movable disk 41, the positions facing each other at an angle of 180 degrees are respectively provided. An engagement recess 41b having a substantially rectangular recess shape is formed. The engagement recess 41b is a recess that extends to a depth in the middle of the fan-shaped portion 41x. As shown in FIG. 11B, each of the pair of engaging recesses 41b is opened at the outer peripheral surface of the fan-shaped portion 41x. The engaging recess 41b is for tightly fitting and holding the engaging protrusion 38 of the drive plate 37 of the plug rod 30 and has a shape and a dimension corresponding to the engaging protrusion 38. In other words, the engagement recess 41b has substantially the same length, width, and thickness as the engagement protrusion 38 (precisely, it is large in a comma unit).

  The movable disk 41 is inserted into the inner space of the cylindrical portion 16 of the housing 10 after the stopper rod 30 is attached to the housing 10 and before the cap 20 is attached, and the pair of engaging recesses 41 b are attached to the housing 10. The rod 30 is fitted in a pair of engagement protrusions 38 of the drive board 37 and is arranged in an internal space corresponding to the water outlet 16 a of the cylindrical portion 16. In this state, the movable disk 41 rotates forward and backward in a corresponding angle range (a range of about 90 degrees) as the plug rod 30 rotates forward and backward, and the pair of water passage recesses 41a are paired with the cylindrical portion 16. A rotation position (valve opening position) completely opposite to the water outlet 16a and a rotation position (valve closing) in which the pair of water passage recesses 41a completely opposes the peripheral wall portion between the pair of water outlets 16a of the cylindrical portion 16. The position is rotated forward and backward.

<Fixed disk>
As shown in FIG. 12, the fixed disk 45 has a disk shape having the same diameter as the diameter of the movable disk 41 (the diameter between the two fan-shaped portions 41x) as a whole. Further, a pair of inclined surfaces 46 are formed on the inner side of the circular outer peripheral edge on the other side surface of the fixed disk 45 in use (upper surface in FIGS. 12B and 12C). As shown in FIG. 12 (a), the pair of inclined surfaces 46 has a configuration in which the inner circular portion of the outer peripheral edge portion of the fixed disk 45 is divided into two by a line extending in the diameter direction, and each inclined surface 46 is a semicircular plate. It becomes the shape inclined surface. That is, one side surface in the thickness direction of the fixed disk 45 has a configuration in which a pair of inclined surfaces 46 are joined by the chord portions (diameter portions) of the arcs in the outer peripheral edge portion. Are inclined at a predetermined angle inwardly (in a direction sinking to a surface opposite to the inclined surface 46) in a direction (diameter direction) perpendicular to the bonding line from these bonding lines. On the other hand, as shown in FIG. 12 (d), one side surface (the lower surface in FIGS. 12 (b) and 12 (c)) of the fixed disk 45 in the use state is a circular flat surface and the movable disk 41. The polished surface is the same as the other side surface, and has high smoothness and low frictional resistance.

  The thickness of the fixed disk 45 is set to be slightly larger than the thickness of the movable disk 41 (more precisely, the dimension is larger in the comma millimeter unit). That is, as shown in FIG. 18, the fixed disk 45 extends from the lower side position of the water outlet 16 a in the cylindrical portion 16 of the housing 10 to the position of one end surface (upper surface in FIG. 17) of the cap 20 attached to the housing 10. Therefore, the thickness of the fixed disk 45 is set to the same dimension as the thickness of the space.

  Further, the fixed disk 45 has a substantially triangular or substantially fan-shaped water passage hole 46a extending in the thickness direction of the fixed disk from the position near the joining line of the pair of inclined surfaces 46 to the middle of the outer peripheral edge. Has been. The pair of water passage holes 46 a are arranged such that each arc-shaped outer peripheral edge overlaps the middle portion of the corresponding inclined surface 46 in the circumferential direction. In this manner, the pair of inclined surfaces 46 are symmetrically disposed on the fixed disk 45 at positions facing each other at an angle of 180 degrees, and similarly, a pair of inclined surfaces 46 are disposed at positions facing each other at an angle of 180 degrees. The water passage holes 46a are arranged symmetrically. Furthermore, the center angle of the water passage hole 46 a of the fixed disk 45 is set to the same angle (about 90 degrees) as the center angle of the water passage recess 41 a of the movable disk 41. Further, on the outer peripheral surface of the fixed disk 45, small cubic locking projections 47 are integrally formed at positions facing each other at an angle of 180 degrees so as to protrude in the radial direction. The pair of locking protrusions 47 protrude from the outer peripheral surface of the fixed disk 45 at positions corresponding to the center position of the circular arc of the water passage hole 46 a of the fixed disk 45, and are arranged symmetrically on the outer peripheral surface of the fixed disk 45.

  The fixed disk 45 attaches the stopper rod 30 to the housing 10, connects the movable disk 41 to the other end of the stopper rod 30, and then attaches the pair of locking protrusions 47 to the cylinder of the housing 10 before attaching the cap 20. The guide guide groove 17a is inserted into the guide lock groove 17a from the open ends of the pair of guide lock grooves 17a on the inner peripheral surface of the portion 16 so as to move to a predetermined position in the internal space of the cylindrical portion 16. In this state, the locking protrusion 47 and the guide locking groove 17a are locked to restrict and prevent the rotation of the fixed disk 45 in the circumferential direction, so that the fixed disk 45 is brought into a predetermined position. It is supposed to be fixed.

[Assembly method]
Next, a method for assembling the resin water stop valve cartridge of the present embodiment configured as described above will be described.
As shown in FIGS. 13 and 14, the engaging portion 31 of the plug rod 30 is mounted inside the housing 10 from the open end on the cylindrical portion side of the housing 10, and the plug rod 30 is attached to the housing 10 by the E-ring ER. Fix in place. Then, the drive board 37 of the plug rod 30 is accommodated in the accommodation space (the space between the step surface 18 and the water outlet 16 a) at the base end of the cylindrical portion 16 of the housing 10, and the engagement protrusion 38 of the drive board 37. Is extended to a position in the middle of the water outlet 16 a of the cylindrical portion 16. At this time, the drive board 37 is disposed in a predetermined accommodation space between the step surface 18 and the water outlet 16 a in the space of the base end portion in the cylindrical portion 16. In this state, the movable disk 41 is movable in a parallel state in which the surface on the engagement recess 41b side of the movable disk 41 faces the opening end of the housing 10 (a state in which the movable disk 41 is disposed in a plane orthogonal to the axial direction of the housing 10). The disc 41 is inserted into the cylindrical portion 16, and the pair of engaging protrusions 38 of the driving plate 37 of the plug rod 30 are inserted and fitted into the pair of engaging recesses 41 b of the movable disc 41. Thereby, the movable disk 41 is connected to the other end (drive end) of the plug rod 30 so as to be integrally rotatable. At this time, the movable disk 41 is accommodated in a predetermined accommodating space corresponding to the thickness portion of the water outlet 16 a in the space on the proximal end side in the cylindrical portion 16.

  Next, in this state, the surface of the fixed disk 45 on the smooth surface side (opposite the inclined surface 46) is parallel to the opening end of the housing 10 (in the plane in which the fixed disk 45 is orthogonal to the axial direction of the housing 10). The fixed disk 45 is inserted into the cylindrical portion 16 and the smooth surface of the fixed disk 45 (sliding surface during valve operation) is replaced with the smooth surface of the movable disk 41 (sliding surface during valve operation). ). At this time, the fixed disk 45 can be smoothly guided and moved into the cylindrical portion 16 by inserting and guiding the pair of locking projections 47 into the pair of guide locking grooves 17a of the cylindrical portion, After the insertion into the cylindrical portion 16 and the contact with the movable disk 41, the locking projection 47 is prevented from rotating in the circumferential direction by the side wall of the guide locking groove 17a of the cylindrical portion 16, so Fixed in position. Finally, when the cap 20 is attached to the open end of the cylindrical portion 16 in this state, the assembly of the resin water stop valve cartridge is completed as shown in FIGS.

[Valve action]
Next, the valve operation of the resin water stop valve cartridge of the present embodiment configured as described above will be described.
<When closed (valve closing)>
As shown in FIG. 18, in the resin water stop valve cartridge, when the water is not flowing, the movable disk 41 is in the fully closed position, and water enters from the water through hole 20 of the cap 20 at the lower end of the resin water stop valve cartridge. The water is completely prevented from flowing in the cylindrical portion 16 of the housing 10 and does not flow out from the water outlet 16a. That is, in the fully closed position, the outer peripheral surfaces of the pair of fan-shaped portions 41x of the movable disk 41 are arranged so as to completely face the pair of water outlets 16a of the housing 10, and close the water outlet 16a. The communication between 16a and the water passage hole 46a of the fixed disk 45 is blocked. Further, the pair of fan-shaped portions 41x of the movable disk 41 are disposed so as to completely face the pair of water passage holes 46a of the fixed disk 45, thereby completely shielding the water passage holes 46a. Thereby, the water from the water passage hole 20 a of the cap 20 is completely blocked by the movable disk 41 at the water passage hole 46 a portion of the fixed disk 45. FIG. 18 is a cross-sectional view of the flow path at the fully closed position as viewed from the side of the resin water stop valve cartridge (the direction in which the peripheral wall between the pair of water outlets 16a is the front).

<When opening the valve (opening operation)>
On the other hand, as shown in FIG. 19, in the resin water stop valve cartridge, the movable disk 41 is in the fully open position when the water flows through the resin water stop valve cartridge. The entered water passes through the flow path in the cylindrical portion 16 of the housing 10 and flows out from the water outlet 16a. That is, from the fully closed position, the stopper rod 30 is rotated by a predetermined angle (about 90 degrees) in the valve opening direction, and the movable disk 41 is rotated in the valve opening direction via the drive panel 37 and the engagement protrusion 38. The pair of water passage recesses 41a of the movable disk 41 are respectively completely opposed to the pair of water outlets 16a of the housing. At this time, the restricting protrusion 33 of the stopper rod 30 comes into contact with the turning restricting protrusion 18a of the insertion hole of the housing 10, so that the movable disk 41 is in the fully open position, and further rotation is prevented. In this fully open position, the pair of water passage recesses 41 a of the movable disk 41 are disposed so as to completely face the pair of water outlets 16 a of the housing 10, and the water passage between the water outlet 16 a and the fixed disk 45 is performed. The hole 46a is communicated. In addition, the pair of water passage recesses 41a of the movable disk 41 are disposed so as to completely face the pair of water passage holes 46a of the fixed disk 45, and the water passage holes 46a are completely opened. Thereby, the water from the water flow hole 20a of the cap 20 passes through the water flow hole 46a of the fixed disk 45 and the water flow recessed part 41a of the movable disk 41 in the axial direction of the cylindrical part 16 at the maximum flow rate. It is turned from the axial direction of the cylindrical portion 16 to the radially outward side by the side surface of the water passage recess portion 41a (the flat “く” -shaped side surface of the fan-shaped portion 41x), and smoothly flows out from the water outlet 16a at the maximum flow rate. To do. FIG. 17 and FIG. 19 show the flow path at the fully opened position in a cross section when viewed from the side of the resin water stop valve cartridge (in the direction with the peripheral wall between the pair of water outlets 16a as the front).

<Sliding frictional resistance during rotation of the stopper rod>
Here, the outer peripheral surface of the insertion portion 32 of the plug bar 30 corresponds to the housing 10 when the plug bar 30 is rotated for rotating the movable disk 41 between the valve closing position and the valve opening position. In this case, the stopper rod 30 slides in contact with the inner peripheral surface (the through hole 11a of the tightening portion 11). However, as described above, the plug rod 30 has a low frictional resistance such as polyacetal resin (POM). Since the whole is integrally formed of a synthetic resin material (and has self-lubricating properties), the frictional resistance during sliding can be greatly reduced, and a smooth rotation operation of the plug rod 30 can be ensured. Can do.

[Example of use]
<Handle part>
Next, a usage example of the resin water stop valve cartridge of the present embodiment configured as described above will be described.
The resin water stop valve cartridge of the present embodiment is used by being mounted on a handle portion 100 of a water tap (particularly, a single water tap) as a mounting target as shown in FIG. Specifically, the handle portion 100 has a predetermined outer shape such as a columnar shape as a whole, and has a large-diameter hole 101, a small-diameter hole 102, an inner surface from one side surface in the thickness direction (upper surface in FIG. 20), The female screw portion 103, the water passage hole 104, and the water inlet hole 105 are formed coaxially. Further, a water discharge hole 106 is formed on one side surface in the length direction of the handle portion 100 (left side surface in FIG. 20). The large-diameter hole 101 has the same inner diameter as the outer diameter of the large-diameter cylindrical portion LC of the housing 10 of the resin water stop valve cartridge (precisely, a slightly larger inner diameter in comma units), and the concave groove portion 13 and the flange portion. 14 is a short cylindrical through hole having an axial length equivalent to a total axial length of 14. The small-diameter hole 102 has the same inner diameter as the maximum external diameter of the fastening male screw portion 15 of the small-diameter cylindrical portion LC of the housing 10 (more precisely, a slightly larger inner diameter in comma millimeter units) and is equivalent to the concave groove portion 15a. A short cylindrical through-hole having an axial length of, and a short cylindrical through-hole having a smaller diameter than the large-diameter hole 101. Thereby, a circular ring-shaped step surface due to a difference in diameter between the large diameter hole 101 and the small diameter hole 102 of the handle portion 100 is provided at the base end of the large diameter hole 101.

  The female screw portion 103 is screwed with the fastening male screw portion 15, has an inner diameter corresponding to the outer diameter of the fastening male screw portion 15, and has the same axial length as the fastening male screw portion 15. Is a female screw hole. The female screw portion 103 is formed by engraving a female screw having a screw pitch, a screw thread height, a number of spirals, and the like corresponding to the fastening male screw portion 15. The water passage hole 104 accommodates the other end portion of the resin water stop valve cartridge (the cylindrical portion 16 and the cap 20 of the housing 10), has an inner diameter larger than the cylindrical portion 16 of the housing 10 by a predetermined dimension, and has a cylindrical shape. This is a cylindrical through hole having an axial length slightly larger than the portion 16. The water inlet hole 105 is a short cylindrical through hole facing the center of the other axial end of the water passage hole 104 (the lower end in FIG. 20), and the water passage hole 20a of the cap 20 of the resin water stop valve cartridge. Has a diameter corresponding to. The water outlet 106 is a cylindrical through hole that faces almost the entire outer periphery of the water passage hole 104.

  As shown in FIG. 21, the assembled water-stop valve cartridge is inserted into the handle portion 100 through the large-diameter hole 101, and the tightening portion 11 of the housing 10 is tightened in the tightening direction with a tool such as a wrench. Then, when the fastening male screw portion 15 is completely screwed into the female screw portion 103, the flange portion 14 comes into contact with the stepped surface of the proximal end of the large-diameter hole 101, and the fastening male screw portion 15 is further screwed. Is blocked. Thus, the resin water stop valve cartridge is held and fixed at a predetermined position of the handle portion 100. At this time, the O-ring OR of the concave groove portion 15a of the small-diameter cylindrical portion SC elastically contacts the inner peripheral surface of the small-diameter hole 102 to maintain watertightness. At this time, the water passage hole 20a of the cap 20 corresponds to the water inlet hole 105 of the handle part 100, and one of the water outlets 16 of the cylindrical part 16 is one side of the water outlet hole 106 of the handle part 100 (FIG. 21). It faces the upper side. On the other hand, the mounting male screw portion 12 of the housing 10 is completely exposed to the outside from one side surface in the thickness direction of the handle portion 100. In the plug rod 30, the engaging portion 31 protrudes further outward than the male screw portion 12 for attachment on one side in the thickness direction of the handle portion 100.

<Ensuring strength of male screw for fastening>
Here, when tightening the tightening portion 11 using the above tool, a large load corresponding to the tightening force is applied to the fastening male screw portion 15, but the fastening male screw portion 15 is as described above. It has a structure (wall thickness, etc.) that can sufficiently withstand such a large load, and the load does not cause defects such as cracks. That is, as described above, the housing 10 is integrally formed of a synthetic resin material having high mechanical strength and precision moldability, such as polyphenylene sulfide (PPS) resin, while the male screw portion 15 portion for fastening is formed. Since the wall thickness ST is set to a value that satisfies the required mechanical strength, such as a structure having sufficient mechanical strength against a large load, it is suitable for a large load or torque from the tightening portion 11. Thus, it is possible to reliably prevent problems such as breakage of the fastening male screw portion 15.

<Handle>
A handle 110 for rotating the stopper rod 30 forward and backward is attached to the engaging portion 31 of the stopper rod 30 in a state where the resin water stop valve cartridge is completely attached to the handle portion 100. That is, the handle 110 includes a handle 111 for rotating operation, a fixing portion 112 for fixing the handle 110 to the plug rod 30, and a cap 113 that shields the inside of the handle 110. The fixing portion 112 is provided in the internal space of the handle 110 and has a spline structure that can be freely engaged with the spline of the engaging portion 31 and is fitted to the engaging portion 31 so as not to rotate. . Then, the handle 110 is fixed to the stopper rod 30 so as to be freely rotatable by fitting and fixing the fixing portion 112 to the engaging portion 31.

  With the handle 110 fixed to the stopper rod 30 of the resin water stop valve cartridge, the handle 110 is rotated forward and backward by the handle 111 between the valve closing position CS and the valve opening position OS of FIG. The valve member 40 can be selectively operated through the valve 30 so as to be in a closed state or an open state. For example, when the handle 110 is rotated to the valve opening position OS, the valve member 40 is in the valve open state (the state shown in FIG. 19), and water from the water inlet 105 of the handle portion 100 is cylindrical from the water passage hole 20a of the cap 20. Water enters the inside of the portion 16, flows out from the water passage hole 46 a of the fixed disc 45, passes through the water passage recess 41 b of the movable disc 41, flows out of the water outlet 16 a of the cylindrical portion 16, and passes through the water outlet hole 106 of the handle portion 100. Flow into the water discharge channel (water discharge pipe or the like).

[Materials used]
The housing 10 is made of any synthetic resin having a relatively high strength in the synthetic resin material, that is, mechanical strength equivalent to that of the PSS resin (tensile strength 150 MPa, You may integrally mold with the other synthetic resin which can ensure bending strength (strength of about 215 MPa). However, it is most preferable to use PSS resin from the viewpoint that in addition to mechanical strength, dimensional accuracy can be ensured by precision moldability and further mechanical strength can be improved by ensuring dimensional accuracy. . Besides, the stopper rod 30 is not integrally formed with the POM resin, but is made of a synthetic resin having a relatively low friction coefficient in the synthetic resin material, that is, a low sliding resistance (0.15 equivalent to that of the POM resin). Alternatively, it may be integrally formed with another synthetic resin that can ensure a certain degree of friction coefficient.

LC Large diameter cylindrical portion OR O-ring SC Small diameter cylindrical portion ST Minimum wall thickness ST Wall thickness ST1 Minimum wall thickness ST1 Wall thickness ST1 Minimum wall thickness ST2 Maximum wall thickness 10 Housing 11 Tightening portion 11 Tightening portion 11a Through hole 12 For mounting Male screw portion 13 Concave groove portion 14 Flange portion 15 Fastening male screw portion 15a Concave groove portion 15x Screw thread 16 Cylindrical portion 16b Thin wall portion 16c Locking protrusion 17 Step surface 17a Guide locking groove 18 Step surface 18a Rotation restricting protrusion 19 Step surface 20 Cap 20a Water flow hole 21 Base 21 Insertion part 21 Base 21a Groove 22 Insertion part 22a Concave groove 23 Concave groove part 30 Plug bar 31 Engagement part 31a Fitting groove 32 Insertion part 33 Restriction protrusion 33a Concave groove 34 Flange part 34a Concave groove 35 Flange part 36 Holding part 37 Drive panel 38 Engagement protrusion 40 Valve member 41 Movable disk 41a Water flow recessed part 41b Engagement recessed part 41x Fan-shaped part 1y center 45 fixed disk 46 inclined surface 46a water passage holes 47 locking projection

Claims (8)

A housing in which all parts are integrally molded from a synthetic resin having a relatively high strength in the synthetic resin material;
All the parts are integrally molded from a synthetic resin having a relatively low coefficient of friction in the synthetic resin material, inserted from one axial end of the housing and extending in the axial direction of the housing;
A fixed disk made of a ceramic disk that is internally mounted at one end in the axial direction of the housing and fixed so as not to rotate;
The housing is pivotally mounted on one end side in the axial direction of the housing so as to be rotatable within a predetermined rotation range on the inner side of the fixed disk, and is connected to the tip of the plug bar so as to rotate the plug bar. And a movable disk made of a ceramic disk that rotates within the rotation range,
A resin water stop valve cartridge that accommodates one axial end of the housing in a water flow space to be attached and is detachably fixed,
The housing is
A hexagonal nut formed integrally with one end of the housing in the axial direction, and a tightening portion in which a through hole penetrating in the axial direction is formed in the center portion;
A large-diameter cylindrical portion that forms a cylindrical shape with a predetermined outer diameter that is integrally formed with the axially central portion of the housing so as to be coaxial with the tightening portion;
A small-diameter cylindrical portion integrally formed on the other axial end of the housing so as to be coaxial with the large-diameter cylindrical portion and to be smaller in diameter than the large-diameter cylindrical portion,
The small diameter cylindrical portion is
A fastening male screw part integrally formed on the outer peripheral surface on the base end side which is a boundary side with the large diameter cylindrical part in the small diameter cylindrical part;
A circular water inlet opening at the tip of the small diameter cylindrical portion, and a water outlet opening in the small diameter cylindrical portion in the vicinity of the fastening male screw portion,
The movable disk and the fixed disk are housed and arranged at a predetermined position on the other end side of the fastening male screw part in the internal space of the small diameter cylindrical part,
The housing further includes:
In the small-diameter cylindrical portion, the wall thickness of the accommodating space portion of the movable disc and the fixed disc is a first wall thickness that can withstand the water pressure applied to the movable disc and the fixed disc, and the wall thickness of the fastening male screw portion is As the second wall thickness that is larger than the first wall thickness of the small-diameter cylindrical portion and can withstand a physical load applied to the fastening male screw portion as the fastening portion is tightened, On the inner peripheral surface of the cylindrical portion, a flat ring-shaped step surface is formed by a difference between the first wall thickness and the second wall thickness at a position aligned with the position on the other end side of the fastening male screw portion. A water stop valve cartridge made of resin.   2. The resin water stop valve cartridge according to claim 1, wherein the housing is integrally formed of a polyphenylene sulfide resin and the plug bar is integrally formed of a polyacetal resin. 3. The housing extends in the axial direction from one end of the large-diameter cylindrical portion to the other end of the male screw portion for fastening of the small-diameter cylindrical portion in the axial direction, and has a through-hole in the tightening portion. Forming an insertion hole larger than the diameter of
The small-diameter cylindrical portion of the housing has a maximum wall thickness at the portion of the fastening male screw portion having the second wall thickness, and a minimum wall thickness at the cylindrical portion having the first wall thickness,
The fastening male screw portion has a wall thickness that can ensure mechanical strength that can withstand the physical load even at the minimum wall thickness portion of the thread valley portion of the fastening male screw,
The cylindrical portion has a wall thickness capable of ensuring an inner diameter capable of securing a necessary volume for securing a flowing water amount and a minimum strength capable of withstanding a load caused by water pressure in the cylindrical portion. 3. A resin water stop valve cartridge according to 1 or 2.   In the axial direction of the small-diameter cylindrical part, a short cylindrical concave groove part constituting the base end part of the small-diameter cylindrical part is provided at one end side from the fastening male screw part and the minimum wall thickness of the fastening male screw part is It is integrally formed on the base end side of the fastening male screw portion with the same wall thickness, and an O-ring is attached to the concave groove portion, and the O-ring is watertight at a position closest to the female screw portion to be attached. 4. The elastic member according to claim 1, wherein the concave groove portion elastically absorbs a load from the fastening male screw portion via the O-ring. 5. Resin water stop valve cartridge according to item.   While the inner diameter of the fastening male screw portion is set to be larger than the inner diameter of the fastening portion by a predetermined dimension, the wall thickness of the fastening male screw portion is equal to the wall thickness of the fastening portion. The resin water stop valve cartridge according to any one of claims 1 to 4, which is set. In the fastening male screw portion, the screw thread of the male screw portion of the fastening male screw portion starts spiraling from one axial end of the fastening male screw portion and spirals at the other axial end of the fastening male screw portion. And the portion where the screw thread is arranged is all set to the second wall thickness,
The cylindrical portion extends in an axial direction from a position immediately after a position where a screw thread of the fastening male screw portion is spiraled, which is a boundary line position with the fastening male screw portion. The resin water stop valve cartridge according to any one of claims 1 to 5. The plug bar is integrally formed with a disc-shaped drive board having the same planar shape as that of the movable disk at the tip which is the other end in the axial direction, and on the side of the drive board facing the movable disk. On the surface, a pair of engaging protrusions that engage with the outer peripheral edge of the movable disk and drive-couple the plug bar to the movable disk are formed integrally.
In the cylindrical portion having the first wall thickness of the small-diameter cylindrical portion, between the flat ring-shaped step surface due to the difference between the first wall thickness and the second wall thickness and the water outlet, 2. A housing space having a circular cross section having an outer shape corresponding to the outer diameter of the driving plate is formed with the same thickness as the driving plate of the plug bar, and the driving plate is housed in the housing space. The resin water stop valve cartridge according to any one of claims 1 to 6.   The movable disk has two identically shaped fan-shaped portions having a fan-plate shape with a central angle of about 90 degrees and symmetrically arranged with an angle of 180 degrees facing each other, and the center side thereof has a predetermined dimension. And forming a pair of flat fan-shaped water passage recesses by the opposing side surfaces of the two fan-shaped portions and the side surfaces of the central portion, and the fan-shaped In the outer peripheral portion of one side surface, engagement recesses having a substantially rectangular recess shape are formed at positions facing each other at an angle of 180 degrees, and the pair of engagement recesses are attached to the housing. 8. The resin water stop valve according to claim 7, wherein the resin water stop valve is fitted in a pair of engaging projections of the drive plate of the stopper rod and is disposed in an internal space corresponding to the water outlet of the small diameter cylindrical portion. cartridge.

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