JP5644040B2 - Hot water mixing cartridge - Google Patents

Description

  The present invention relates to a hot and cold water mixing cartridge incorporated in a single lever type mixing faucet that adjusts the flow rate and temperature of hot water by operating a lever.

  In a conventional hot and cold water mixing cartridge, a sealing member is provided between the fixed disk and the bottom surface of the case, and the sealing member divides the water supply path, the hot water supply path, and the mixed water discharge path in a watertight manner. . It is known to devise the shape and arrangement of the sealing member in order to ensure the sealing by the sealing member and prevent water leakage. (For example, refer to Patent Document 1.)

  In this Patent Document 1, the first receiving groove for receiving the seal member on the bottom surface of the case is formed from an inner groove portion facing the fixed disk and an outer groove portion formed on the outer peripheral side of the inner groove portion. Forming a support portion that is housed in the outer groove portion, or forming an annular groove on the outer peripheral side of the pressing portion that holds the first seal member of the fixed disk, and providing a second seal member in the annular groove Have been described. In addition, the front end accommodated in the 1st accommodation groove is formed in a curved surface as a shape of a sealing member, and the clearance gap is formed between the both corners of the back side of a 1st accommodation groove, and a sealing member front end side. It is also described.

However, in this conventional seal member housing structure, although a gap is formed between both corners on the back side of the first housing groove and the front end side of the seal member, the gap is slight, and the seal member is When compressed by being sandwiched between the fixed disk and the bottom surface of the case, the gap is immediately filled with the seal member, and if it is further compressed, the repulsive force received from the seal member will increase. There is a problem that the surface pressure of the sliding surfaces of the fixed disk and the movable disk increases, the sliding force increases, and the lever operating force becomes heavy.
JP 2005-315333 A

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to press the fixed disk against the bottom surface of the case and crush the seal member when the movable disk is moved by operating the lever. However, the repulsive force from the seal member does not increase suddenly, the surface pressure of the sliding surface of the fixed disk and the movable disk is kept stable, and the sliding performance of the movable disk is affected. An object is to provide a hot and cold water mixing cartridge.

In order to achieve the above object, according to the first aspect of the present invention, there are formed a fixed disk provided with a water supply hole, a hot water supply hole, and a discharge hole, and a mixing chamber communicating with each hole of the fixed disk. In a hot and cold water mixing cartridge comprising: a movable disk that is slidably superposed on a fixed disk; a case housing the fixed disk and the movable disk; and a lever for moving the movable disk. A water supply passage, a hot water supply passage, and a discharge passage communicating with the holes of the fixed disk are formed in the bottom of the case, and the upper surface of the case bottom is in contact with the lower surface of the fixed disk so that the passages are formed. An insertion groove for storing a seal member for partitioning is formed, and a cross section of the seal member has a base portion having substantially the same width as the insertion groove, and insertion from the base portion into the insertion groove. Projecting toward the projecting portion, and having a concave surface recessed from the base portion toward the projecting portion on both sides of the projecting portion, and the projecting portion and the concave surface are formed along the insertion groove. The width of the protrusion formed along the insertion groove is 65% to 75% of the width of the base, and in the assembled state of the hot water / water mixing cartridge, the protrusion, the concave surface, and the have a clearance between the fitting groove, the cross-section of the seal member, the fixed disk and to abut the side provided with a projection projecting from its base, yet the impact from the base on both sides of the projection It has a concave surface recessed toward the part, and the protrusion and the concave surface are formed along the peripheral surface of each hole of the fixed disk .

  According to the present invention, when the fixed disk is pushed toward the bottom of the case and the seal member is crushed when trying to operate the movable disk by operating the lever, the protrusion inserted into the insertion groove is pushed. Although it is crushed, its deformation can be absorbed in the space between the concave surface and the insertion groove, so that the repulsive force from the seal member does not increase suddenly, and the stable fixed disk and movable disk slide. A hot and cold water mixing cartridge capable of securing the surface pressure of the surface can be provided.

Further, according to the present invention, the cross-section of the seal member is provided with protrusions protruding from the base on the side contacting the fixed disk, and on both sides of the protrusion, the base faces the protrusion. The projection and the concave surface are formed along the peripheral surface of each hole of the fixed disk.

Therefore, in addition to the above effects, by making the both sides of the seal member's fitting groove side and the side contacting the fixed disk the same shape, the assemblability is good regardless of the orientation of the back and front during assembly. Become. Furthermore, since the top and bottom are uniformly crushed, stable sealing performance can be exhibited.

  According to the present invention, when the movable disk is moved by operating the lever, the fixed disk is moved to the movable disk side by the repulsive force generated when the fixed disk crushes the seal member installed in the insertion groove on the upper surface of the case bottom. The contact pressure of the sliding surface of the fixed disk and the movable disk does not increase and the surface pressure of the sliding surface of the fixed disk and the movable disk is kept stable, and the sliding performance of the movable disk is affected. A hot and cold water mixing cartridge can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a single lever type mixing faucet incorporating a hot water mixing cartridge according to the present invention, and FIG. 2 is an exploded perspective view showing components of the single lever type mixing faucet. FIG. 3 is a view showing a state in which the main body of the single lever type mixing faucet is viewed from above. FIG. 4 is an exploded view showing components constituting the main body. FIG. 5 is a cross-sectional view showing a cross section of a single lever type mixing faucet, FIG. 6 is an exploded perspective view showing components of a hot water / water mixing cartridge, and FIG. 7 is an enlarged view of a cross section of a portion housing a seal member. FIG. 8 is a perspective view of the seal member. FIG. 9 is a schematic view showing a state of the seal member before being inserted into the insertion groove and being compressed, and FIG. 10 is a schematic view showing a state of the seal member when being inserted into the insertion groove and compressed.

As shown in FIGS. 1 to 3, the single lever type mixing faucet 1 in which the hot and cold water mixing cartridge of the present invention is used mainly includes an operation unit 10 operated by a user and water discharge and water stoppage by movement of the operation unit 10. And a hot water mixing cartridge 20 for adjusting the water discharge temperature, a main body 30 having a water supply passage 30a, a hot water supply passage 30b, and a discharge passage 30c, a cartridge presser 40 disposed so as to cover the hot water mixing cartridge 20, and hot water discharged from the water. The water outlet 50 is made up of.
The single lever mixing faucet 1 is generally placed on the top of a counter surface (not shown) such as a kitchen or a washroom, and has a horseshoe-shaped metal fitting (not shown) and a fastening fixture (not shown). To the counter surface (not shown).

  The operation unit 10 has a well-known structure and is connected by fitting the lever 21 of the hot / cold water mixing cartridge 20 into the recess 10 a of the operation unit 10. By moving the operation unit 10 up and down and left and right, the movable disk 22 slides with respect to the fixed disk 23 to adjust water discharge and temperature adjustment. (Fig. 5)

  The main body 30 also has a well-known structure, and as shown in FIGS. 2 to 4, an upper main body 31 having a water supply passage 30a, a hot water supply passage 30b, and a discharge passage 30c, and a lower side for supporting the upper main body 31. The upper main body 31 is fitted into the lower main body 32 and fixed by screws (not shown).

  Specifically, the upper main body portion 31 is formed in a substantially cylindrical shape, and a water supply passage 30a, a hot water supply passage 30b, and a discharge passage 30c are provided on the bottom surface portion. And below, a water supply pipe (not shown) extending from the water supply source, a hot water supply pipe (not shown) extending from the hot water supply source, and a water discharge pipe (not shown) for sending the mixed water discharged from the hot water mixing cartridge to the water outlet 50 Is connected. The lower main body portion 32 is also formed in a substantially cylindrical appearance, and the water supply pipe, the hot water supply pipe, and the discharge pipe communicating with the water supply passage 30a, the hot water supply passage 30b, and the discharge passage 30c of the upper main body portion 31 are disposed at predetermined positions. Has the role of a guide.

  The cartridge presser 40 is also a well-known structure, and the outer appearance is formed in a substantially inverted bowl shape so as to cover the hot / cold mixing cartridge 20, and has an opening 40 a in the center of the upper surface, and is formed on the lower inner peripheral surface thereof. A female screw (not shown) is attached to the main body portion 30 by screwing with a male screw (not shown) provided on the upper outer peripheral surface of the lower main body portion 32.

Next, the hot and cold water mixing cartridge 20 of the present invention will be described.
As shown in FIG. 6, the hot and cold water mixing cartridge 20 includes a fixed disk 23 fixed to a case 27 to be described later, and a movable disk 22 that slides on the upper surface of the fixed disk 23 to adjust water discharge and temperature. A lever 21 for moving the movable disk 22, a lever guide 24 for transmitting the operation of the lever 21 to the movable disk 22, and a case main body 27 and a case bottom 26 for storing the components. And a cover 28, and a seal member 25 disposed between the lower surface of the fixed disk 23 and the upper surface of the case bottom portion 26.

  The fixed disk 23 has a disk shape made of ceramic, and a water supply passage 26b, a hot water supply passage 26c, and a discharge passage 26d formed in a case bottom portion 26, which will be described later, are connected to a water supply hole 23a, a hot water supply hole 23b, and a discharge passage, respectively. A hole 23c is provided. Further, the outer peripheral portion is provided with a concave portion 23 d for engaging with the inner peripheral surface portion [of the case main body 27 of the hot / cold water mixing cartridge 20. (Fig. 6)

  The movable disk 22 has a disk shape made of ceramic, and an opening 22a is provided at the center thereof, and a recess 22b for fitting with the lever guide 24 is provided at the outer periphery. (Fig. 6)

  The outer appearance of the lever 21 is a substantially quadrangular prism having a spherical body 21a at the center, and the upper portion of the spherical body 21a is fitted into the concave portion 10a of the operation unit 10, and the spherical body 21a is inserted into the case lid 28. It is provided to prevent the lever 21 from passing through the hole 28a. (Fig. 5)

  The lever guide 24 is made of a resin material in a columnar shape, and has a lever hole 24 a for inserting a lever in the upper part thereof. The lever guide 24 is driven integrally with the movable disk 22 by operating the lever 21. It has the role of transmitting movement to the movable disk. (Fig. 6)

  Further, a mixing chamber 29 is formed by the space between the opening 22a of the movable disk 22 and the lever guide 24, and the hot water flowing in from the water supply hole 23a and the hot water supply hole 23b of the fixed disk 23 are mixed and directed toward the discharge hole 23c. It has a role to let it flow out. (Fig. 5)

  The case bottom 26 is made of a resin material such as PPS in a substantially cylindrical shape, and on the inner side, a water supply passage 30a, a hot water supply passage 30b, a water supply passage 26c communicating with the discharge passage 30c, a hot water supply passage 26c, and a discharge A passage 26d is provided. On the upper surface side of the case bottom portion 26, there is an insertion groove 26 a that is formed to have substantially the same width as the base portion 25 d of the seal member 25 and into which the seal member 25 is inserted. Further, an engagement protrusion 26e for engaging with a case body 27 described later is provided on the side peripheral surface.

  The case main body 27 is formed in a substantially cylindrical shape, and an engagement opening 27a for engaging with the lid 28 on the upper peripheral side surface and an engagement hole 27b for engaging with the case bottom 26 on the lower peripheral side surface. It has.

  The lid 28 is made of a resin material in a disk shape, and an insertion hole 28a for the lever 21 to be inserted is provided at the center. Further, two engaging claws 28b are provided from the lower surface portion of the lid 28 in the same direction as the central axis of the insertion hole 28a and for engaging with the case main body.

  As shown in FIGS. 6 to 8, the seal member 25 is formed with a water supply passage 25a, a hot water supply passage 25b, and a discharge passage 25c that surround the water supply passage 26b, the hot water supply passage 26c, and the discharge passage 26d of the case bottom 26. A rubber packing having protrusions 25e formed vertically along the periphery of the water supply passage 25a, the hot water supply passage 25b, and the discharge passage 25c. Generally, a rubber material such as EPDM is used.

  As shown in FIG. 9, the cross-sectional cut shape of the seal member 25 includes a base portion 25d formed substantially the same as the width of the fitting groove 26a provided on the upper surface of the case bottom portion 26, and a protrusion 25e protruding from the base portion 25d. It is provided at the upper and lower portions of the base portion 25d. And both sides of the protrusion 25e have concave surfaces 25f that are recessed from the base 25d toward the protrusion 25e. As a result, concave surfaces 25f are provided on both sides of the protrusion 25e over the entire circumference of the seal member 25 along the insertion groove 26a.

  The thickness H of the seal member 25 is set to 2.5 to 4 mm, the width D of the base portion is set to 1.5 to 3 mm, and the width d of the protrusion 25e is 65% to 75% with respect to the width D of the base portion 25d. The concave surface 25f which can make the surface pressure of the sliding surface of the fixed disk 23 and the movable disk 22 stable can be formed. Further, when the protrusion dimension h is formed by a semicircle equivalent to the width d of the protrusion 25e, not only a stable surface pressure but also a good sealing performance can be obtained.

The hot and cold water mixing cartridge 20 composed of the members as described above is assembled as follows.
First, the seal member 25 is inserted into the fitting groove 26 a of the case bottom portion 26. Next, the fixed disk 23 is inserted from the lower part of the case body 27 with the concave part 23d on the outer periphery and the convex part 27c on the inner periphery of the case body 27, and then the lower surface of the fixed disk 23 fitted into the case body 27. The claw 26e on the outer periphery of the case bottom 26 and the hole 27d in the case body 27 are fitted and fixed so that the upper surface of the case bottom 26 into which the seal member 25 is inserted is overlapped. Then, the convex part 24b of the lever guide 24 and the movable disk concave part 22b are overlapped and inserted from the upper part of the case body 27, the lever 21 is inserted into the lever hole 24a of the lever guide 24, and the cover 28 is covered from the upper part of the lever 21. Fix to the main body 27.

  At this time, the cross-sectional state of the seal member 25 inserted into the insertion groove 26a before the case bottom portion 26 is fitted to the case body 27 is schematically shown in FIG. 9, the cross-section of the seal member 25 when fitted. FIG. 10 shows the state. As shown in the space A in FIG. 10, the seal member 25 is deformed in the vertical direction and crushed by forming a gap with the fitting groove 26 a by the concave surfaces 25 f on both sides of the protrusion 25 e of the seal member 25. The filling state with respect to the fitting groove 26a generated at the time can be suppressed.

  The hot and cold water mixing cartridge 20 assembled as described above is inserted into the main body portion 30 of the single lever type mixing faucet 1 from above, and then the main body of the cartridge presser 40 is covered from the upper portion of the hot and cold water mixing cartridge 20. The single lever type mixing faucet 1 is formed by being screwed to the part 30 and assembled by fitting the recess 10 a of the operation part 10 into the lever 21 of the hot water mixing cartridge 20.

  The single lever type mixing faucet 1 using the hot and cold water mixing cartridge 20 of the present invention has a water supply hole of the fixed disk 23 by the lever 21 moving the movable disk 22 when the user moves the operation unit 10 upward. Hot water flows into the mixing chamber 29 from the hot water supply hole 23b and the mixing chamber 29, and the mixed water flows toward the discharge hole 23c, and hot water is discharged from the water discharge portion 50.

  In the conventional single lever type mixing faucet, when the movable disk 22 moves, the fixed disk 23 is pressed against the case bottom 26, whereby a repulsive force of the seal member 25 is generated on the fixed disk 23, and the fixed disk 23 is moved to the movable disk. The surface pressure is increased on the sliding surfaces of the fixed disk 23 and the movable disk 22. For this reason, there is a problem that the operational feeling when moving the operation unit 10 becomes heavy and it is difficult to operate, but in the present invention, a gap is formed between the seal member 25 and the insertion groove 26a by the recess 25f. Furthermore, since a gap is also formed between the seal member and the lower surface of the fixed disk 23, the surface pressure is kept constant while the repulsive force of the seal member 25 is stable, so that the sliding is smooth. Thus, it is possible to maintain a good operability state.

  Further, even if hot water, water, or mixed water flows between the fixed disk 23 and the case bottom 26 and water pressure is generated in the horizontal direction in FIG. 7, the base 25d of the seal member 25 is substantially the same as the fitting groove 26a. The same width, sealing performance between the base portion 25d and the insertion groove 26a is ensured, and the convex portion 25d protruding up and down of the base portion 25d is not displaced by the horizontal water pressure. With the width d of 65% to 75% with respect to the width D of the base portion 25d, good sealing performance can be ensured without the convex portion 25f falling down due to the water pressure B applied from the side.

The perspective view of the single lever mixing faucet which stored the hot and cold water mixing cartridge concerning the present invention. The disassembled perspective view which showed the component of the single lever type mixing faucet. It is the figure which showed the state which looked at the main-body part of a single lever type mixing faucet from the top. The exploded view which showed the component which the main-body part comprises. Sectional drawing which shows the cross section of a single lever type mixing faucet. The exploded perspective view of a hot and cold water mixing cartridge. The enlarged view of the cross section of the part which accommodated the sealing member. The perspective view of a sealing member. The schematic diagram which showed the state of the sealing member before inserting in a fitting groove | channel and compressing. The schematic diagram which showed the state of the sealing member when inserted in the insertion groove | channel and compressed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Single lever type mixing faucet 10 ... Operation part 20 ... Hot water mixing cartridge 21 ... Lever 22 ... Movable disk 23 ... Fixed disk 24 ... Lever guide 25 ... Seal member 26 ... Case bottom part 27 ... Case main body 28 ... Cover 29 ... Mixing Chamber 30 ... Main body 31 ... Upper main body 32 ... Lower main body 40 ... Cartridge holder 50 ... Water discharge part

Claims (1)

A fixed disk having water supply holes, hot water supply holes, and discharge holes;
A mixing chamber communicating with each hole of the fixed disk is formed, a movable disk that is slidably superposed on the fixed disk, and
A case housing the fixed disk and the movable disk;
A lever for moving the movable disk;
In a hot and cold water mixing cartridge with
A water supply passage, a hot water supply passage, and a discharge passage communicating with the holes of the fixed disk are formed in the bottom of the case, and the upper surface of the case bottom is in contact with the lower surface of the fixed disk so that the passages are formed. An insertion groove for storing a seal member for partitioning is formed,
The cross-section of the seal member includes a base having substantially the same width as the insertion groove, and protrusions protruding from the base in the insertion direction into the insertion groove, and the protrusions protrude from the base on both sides of the protrusion. Having a concave surface that is recessed toward the part, the protrusion and the concave surface are formed along the insertion groove,
The width of the protrusion formed along the fitting groove Ri 65% to 75% der width of the base,
In a state in which the hot and cold water mixing cartridge has been assembled, it has a clearance between the projection and the concave surface and the fitting groove,
The cross-section of the seal member includes protrusions protruding from the base on the side that contacts the fixed disk, and on both sides of the protrusion, there are concave surfaces that are recessed from the base toward the protrusion. The hot and cold water mixing cartridge, wherein the protrusion and the concave surface are formed along a peripheral surface of each hole of the fixed disk .

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