JP2006002485A - Stool type toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stool type toilet bowl having improved bowl face washing effects by surely swirling washing water. <P>SOLUTION: An annular recessed groove 5 is provided throughout the periphery of an upper end 4 of a bowl 3 of a toilet bowl body 2. The annular recessed groove 5 is formed in an approximately rectangular cross section with a flat portion 11a at least in a central portion 11 of a side face 6 on the lower side. Opening ends 6a, 7a of both side faces 6, 7 of the recessed groove 5 range to an inner wall face 8 of the bowl 3. For washing the inner wall face 8 of the bowl 3, a plurality of nozzles 9 inject washing water into the recessed groove 5 to generate a swirling flow in the annular recessed groove 5. The nozzles 9 are provided at a central portion 12 of a side face 7 on the upper side of the recessed groove 5 in the same annular direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to washing of a seat-type toilet (Western style toilet), and relates to a technique that can efficiently and reliably carry out washing of a bowl surface of a toilet body even at a low water pressure.

    2. Description of the Related Art Conventionally, various methods for improving the washability of a bowl surface of a toilet body are known for flush toilet seats.

  For example, according to Patent Document 1, as shown in FIG. 8, a large number of spray holes 54 are formed on the lower surface of a rim water supply channel 53 that is annularly arranged on the upper surface of the bowl surface 52 of the toilet body 51 of the seat-type toilet 50. Has been. A configuration is disclosed in which cleaning water is uniformly supplied from the plurality of spray holes 54 to the bowl surface 52.

Further, according to Patent Document 2, as shown in FIG. 9, a nozzle 57 is provided at one location on the upper end of the bowl surface 56 of the toilet body 55 so that high-pressure washing water is ejected in the horizontal direction. A method for forming the swirling water stream 58 is disclosed.
JP-A-5-79091 Japanese Patent Laid-Open No. 2002-146887

  However, in the method of Patent Document 1, the diameter of the spray hole 54 is made small in order to clean the bowl surface by the water pressure of the spray hole 54 directly provided in the rim water supply channel 53. For this reason, since finishing glazing (medicine) cannot be carried out completely for the spray hole 54 of the toilet body 51 made of ceramics, it is said that roughness remains on the inner surface of the spray hole 54 and dirt easily adheres. There were drawbacks. In addition, since the cleaning water is only discharged in the vertical direction toward the bowl surface 52, there is a problem that the dirt adhering to the bowl surface cannot be positively removed with this type of cleaning water.

  Further, in the rim water supply channel 53, a sufficient amount of water is supplied to the water injection hole 54 close to the water pressure side, but the water pressure is reduced at the tip side far from the water pressure side and the water force is reduced. There was a problem that you can't.

  In the method of Patent Document 2, a certain amount of swirling flow can be generated by the horizontal cleaning water from the nozzle 57, but depending on the installation location (region) of the toilet body 55, only a low water pressure can be obtained. It was difficult to form a swirling flow in the entire area, and there was a problem that the cleaning water flow did not go over a wide area and dirt remained.

  Furthermore, since the nozzle 57 is provided in one place, a large amount of discharge flow is required for the nozzle 57, which causes a problem that the periphery of the nozzle becomes dirty due to water splashing during operation.

  Therefore, in view of the above problems, the present invention aims to provide a seat-type toilet that can improve the cleaning effect by reliably swirling the cleaning water over the entire area of the bowl surface even at low water pressure and low water volume. To do.

  The invention of claim 1 is a flush-type seat-type toilet, wherein an annular concave groove is provided over the entire circumference of the upper end of the bowl of the toilet body, and the opening ends of both side surfaces of the annular concave groove are Continuing with the inner wall surface of the bowl, the concave groove has a substantially rectangular cross-sectional shape, and has a flat portion at least in the center of the lower side surface. A plurality of nozzles for injecting cleaning water therein are provided at the center of the side surface on the upper side of the concave groove in the same annular direction.

  In this seat-type toilet, at least the lower side central part of the concave groove is flat (horizontal), so the washing water does not flow into the bowl immediately, but remains in the concave groove for a certain period of time (in units of seconds). be able to. Further, since the cleaning water is jetted into the concave groove by the plurality of nozzles, it is possible to generate a swirling flow that swirls in the concave groove.

  The invention according to claim 2 is the seat-type toilet according to claim 1, wherein in order to supply cleaning water to be injected into the inside of the concave groove, the concave groove is provided directly above the side surface on the upper side of the concave groove. An annular (rim) water supply channel formed integrally with the bowl is provided with the upper side surface as one wall surface.

  In this seat-type toilet, since the annular (rim) water supply channel can be integrally formed with the upper side surface of the concave groove, the cleaning water can be supplied to the nozzle continuously and stably.

  A third aspect of the present invention is the seat-type toilet according to the first or second aspect, wherein the nozzle is a nozzle that is integrally formed on the upper side surface of the concave groove.

  In this seat-type toilet, the nozzle is integrally formed with the upper side surface of the concave groove, so that no mounting parts or the like are required, and the nozzle can be formed into an integral streamline type. In addition, since the nozzle is not mounted, there is no mounting failure.

  A fourth aspect of the present invention is the seat-type toilet according to the first or second aspect, wherein the nozzle is a nozzle that is detachably attached to an upper side surface of the concave groove.

  In this seat-type toilet, the nozzle is detachable, so that the optimum nozzle suitable for the water supply pressure during use can be selected in a timely manner.

  According to the first aspect of the present invention, since the lower side surface of the concave groove is flat, the washing water does not quickly flow into the bowl and can remain in the concave groove for a certain period of time. The swirling flow can be generated.

  In addition, since the cleaning water is jetted into the concave groove by the plurality of nozzles, a laminar swirl flow that continuously swirls in the concave groove can be generated.

For this reason, since the swirling flow spreads over the entire bowl surface even at low water pressure and low water volume, the cleaning effect can be improved because the area in contact with the bowl surface increases even with the same cleaning water amount. Since the dirt adhering to the inside can be surely removed, the hygiene is improved.

  According to the invention of claim 2, since the annular (rim) water supply channel can be integrally formed with the upper side surface of the concave groove, the cleaning water can be supplied to the nozzle continuously and stably.

  According to the invention of claim 3, since the nozzle is integrally formed with the upper side surface of the concave groove, there is no need for an attachment part or the like, and since it is not an attachment type, no attachment failure occurs. And it can form integrally in a streamline type. For this reason, since resistance with respect to the flow of washing water decreases, a stable laminar swirl flow can be generated in the concave groove.

  As a result, the swirling flow spreads over the entire bowl, and the dirt attached to the bowl by the swirling flow can be surely removed, thereby improving hygiene.

  According to the invention of claim 4, since the nozzle can be detachably attached to the upper side surface of the concave groove, the optimum nozzle suitable for the supply water pressure during use can be selected at the appropriate time.

  Therefore, a stable laminar swirl flow can be generated in the concave groove.

  As a result, the swirling flow spreads over the entire bowl, and the dirt attached to the bowl by the swirling flow can be surely removed, thereby improving hygiene.

<First Embodiment of the Present Invention>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

<Composition of seat-type toilet>
As shown in FIGS. 1A and 1B, the seat-type toilet 1 according to the embodiment of the present invention is provided with an annular concave groove 5 over the entire upper end 4 of the bowl 3 of the toilet body 2. .
Open end portions 6a and 7a of both side surfaces 6 and 7 of the annular concave groove 5 are continuous with the inner wall surface 8 of the bowl 3, but the open end portions 6a and 7a are formed with curved surfaces with rounded corners. ing. The concave groove 5 has a substantially rectangular cross-sectional shape, and has a flat portion 11a at least in the central portion 11 of the lower side surface 6.

  Further, in order to clean the inner wall surface 8 of the bowl 3, a plurality of nozzles 9 for injecting cleaning water are provided inside the concave groove 5, and the nozzles 9 are arranged in the same direction in an annular shape. Provided in the central portion 12 of the upper side surface 7.

  Here, the dimensions of the substantially rectangular cross-sectional shape of the concave groove 5 are, for example, the length S of the lower side surface 6 and the upper side surface 7 is 20 mm, and the length T of the bottom 13 of the concave groove 5 is about 25 mm. .

  Further, an annular (rim) water supply channel 10 is formed immediately above the upper side surface 7 of the concave groove 5, and the wash water supplied to the annular (rim) water supply channel 10 passes through a plurality of nozzles 9, It is injected into the inside of the concave groove 5. Here, the annular (rim) water supply channel 10 is formed integrally with the toilet body 2 as an annular water channel closed with the upper side surface 7 of the concave groove 5 as one wall surface. The cross-sectional shape at each position of the annular (rim) water supply channel 10 is appropriately determined in accordance with the shape of the upper end portion 4 of the bowl 3, but is a rectangle having substantially the same shape.

  Needless to say, the cleaning region of the bowl surface is a region below the concave groove 5 including the concave groove 5.

  As shown in FIG. 2, the wash water supplied from the supply port 15 flows while rotating in the annular (rim) water supply channel 10 in the direction of the arrow. At this time, since the water supply channel 10 is closed by the wall 16 in the vicinity of the supply port 15, the washing water is somewhere in the circular (rim) water supply channel 10 in the direction indicated by the arrow in FIG. It is injected into the concave groove 5 via the nozzle 9 described.

  As shown in FIG. 3, a total of nine nozzles 9 are arranged on the bottom surface 30 of the annular (rim) water supply channel 10 (corresponding to the side surface 7 on the upper side of the concave groove 5). 5, the cleaning water 17 is also jetted in the same direction along the annular concave groove 5. The total nine arrangement positions of the nozzles 9 are determined through experiments based on the performance of the nozzles, the shape of the bowl 3, the flow rate and pressure of the washing water, and the like.

  If the nozzle 9 is directed to the inner side of the ring as much as possible, the washing water flows out to the bowl inner surface 8 as much as possible. Conversely, if the nozzle 9 is turned to the outer side of the ring as much as possible, the washing water is correspondingly increased to the concave groove 5. The washing water bounces back to the bottom 13 of the bowl and quickly flows out into the bowl inner surface 8. For this reason, in order to stably generate a swirling flow swirling in the annular concave groove 5, the nozzle 9 is accurately provided along the annular concave groove 5 (toward the annular direction).

  As shown in FIG. 4, each nozzle 9 is formed so as to protrude downward from the bottom surface 30 of the annular (rim) water supply channel 10. For example, as an example of the shape of the nozzle 9, the protruding length F is approximately 100 mm, and the protruding height G (the height from the surface of the bottom surface 30 to the nozzle hole E) is approximately 10 mm. The nozzle hole E is approximately 10 mm in diameter, and the injection shaft 18 is formed at an inclination angle α = approximately 5 degrees with respect to the annular (rim) water supply channel 10.

  Here, the region of length F is formed by the regions of F1 and F2, the region of F1 is a straight line parallel to the washing water injection axis 18, and the region of F2 is an S-shaped curve. Then, assuming that the point where the regions F1 and F2 intersect is F3, and the point where the linear bottom surface 30 and the region F2 intersect is F4, adjacent regions at the points F3 and F4 are fixed in a streamlined manner. For this reason, the washing water can flow smoothly as shown by the arrows.

  Although not shown, the nozzle 9 is also formed in a semi-conical shape in the width direction (depth direction in the drawing) of the annular (rim) water supply channel 10 so that the cleaning water can flow smoothly.

  Thus, the nozzle 9 can wash water as much as possible with respect to the washing water in the annular (rim) water supply channel 10 at the upper part of the nozzle 9 and the washing water (swirl flow) in the concave groove 5 at the lower part of the nozzle 9. It is integrally formed in a streamlined shape on the bottom surface 30 (also the upper side surface 7 of the concave groove 5) of the annular (rim) water supply channel 10 so that the resistance flows less.

  The nozzle hole E has a diameter of about 10 mm, and has a size that does not pose a problem enough to perform glazing (medicine) when integrally molded as a pottery.

<Effects of sitting toilet>
As described above, the annular concave groove 5 is provided over the entire upper end 4 of the bowl 3 of the toilet body 2. The annular concave groove 5 has a substantially rectangular cross-sectional shape having a flat portion 11a (horizontal plane) at least at the central portion 11 of the lower side surface 6, and the nozzle 9 is located on the upper side of the concave groove 5 in the same annular direction. Provided in the central portion 12 of the side surface 7.

  Since the nozzle 9 is integrally formed with the upper side surface 7 of the concave groove 5, no attachment parts or the like are required, and since it is not an attachment type, no attachment failure occurs.

  For this reason, the cleaning water sprayed from the nozzle 9 is surely sprayed along the flat portion 11 a provided in the central portion 11 of the lower side surface 6 of the concave groove 5.

  Therefore, as shown in FIG. 5, the cleaning water sprayed in the same direction along the annular concave groove 5 from a plurality of nozzles (not shown) does not immediately flow out into the bowl inner surface 8 but as a swirling flow 20 in the concave groove 5. Can be turned.

  Here, the time during which it does not flow out is several seconds, but since the new washing water is always replenished from the nozzle 9 in the swirling flow 20 in the concave groove 5, it flows out to the bowl inner surface 8 by the replenished amount. Thus, since the swirl flow 20 is stably formed in the concave groove 5, the washing water 22 overflowing from the open end 6a of the lower side surface 6 swirls with a thickness 21 over the entire circumference of the ring. Since it flows out, the bowl inner surface 8 can be wash | cleaned over the whole region. Since the wash water falls while swirling, it has kinetic energy in the swiveling direction in addition to the potential energy of free fall, so that the dirt on the inner surface 8 of the bowl is powerfully removed without damaging the energy (water force). Can be washed.

  In addition, since the swirl flows while swirling in the same direction throughout the entire bowl, the swirl force increases even with the same amount of washing water, and the area (time) in contact with the bowl surface increases, thus increasing the cleaning effect. it can. And since the stain | pollution | contamination adhering in the bowl can be peeled off reliably, sanitary property improves.

  Furthermore, since the diameter of the nozzle hole E is about 10 mm with respect to the cross-sectional shape of the concave groove 5 (S = approximately 20 mm, T = approximately 25 mm), the opening (open end) of the recessed groove 5 is larger than the discharge diameter of the cleaning water. Since the width between the portions 6a and 7a is not so large, it is possible to substantially prevent air from being mixed into the concave groove 5 from the open ends 6a and 7a. For this reason, together with the fact that the nozzle 9 is streamlined, a swirl flow in a substantially laminar flow state is formed in the concave groove 5.

  If the swirl flow is a substantially laminar flow, the flow of the washing water is stabilized as compared with the case of the turbulent flow, so that the stable swirl washing water can be flowed to the bowl surface 8. And since the bowl surface 8 whole region can be reliably covered with washing water, a washing effect improves. Further, since the cleaning water is in a substantially laminar flow state, the cleaning water does not jump for a moment and the hygiene is improved.

Note that if the gap between the open ends 6a and 7a of the concave groove 5 is wide, it is easy to entrain air, resulting in a gas-liquid mixed turbulent state. For this reason, when the cleaning water in the turbulent state of gas-liquid mixing flows out from the opening end 6a of the lower side surface 6 to the bowl surface 8, the opening end 6a cannot be covered with 100% cleaning water, An area that is not covered with the washing water is generated on the bowl surface 8. For this reason, the cleaning effect is reduced.
In this case, since the flow of the cleaning water varies and varies, even the turbulent cleaning water may be randomly covered with the cleaning water, but the cleaning effect is reduced. That is no different.

  It is also clear that if the gap between the open ends 6a and 7a of the concave groove 5 is wide, a region where the cleaning water is not covered is formed in the concave groove 5 itself.

  As described above, the cross-sectional shape of the concave groove 5 is designed so that a stable swirling flow can be formed. However, since it is related to the water pressure and amount of washing water, the shape and number of nozzles, etc. It is preferable to determine by experiment etc. according to the conditions of a place to be provided.

  As shown in FIG. 6, the state of the cleaning water on the bowl surface 8 of the bowl 3 being cleaned is that the swirl flow 20 generated in the concave groove 5 continuously flows out from the entire circumference of the bowl surface 8. The entire area 8 can be cleaned by the planar swirl flow 24. After cleaning, the water is discharged from the discharge hole 25.

<Second Embodiment of the Present Invention>
As shown in FIG. 7, a water channel member 60 as a nozzle is detachably provided separately from the rim water channel 10, but an opening for attaching the water channel member 60 to the bottom surface 30 of the rim water channel 10 in advance. 66 is provided.

  The flowing water channel member 60 has a substantially S-shaped flow path in order to guide the cleaning water 17 from the rim water supply channel 10 to the concave groove 5 below the rim water supply channel 10, and is formed on the rear side of the water flow. By fitting the forked portion 61 into the opening 66 of the bottom surface 30 and fixing the mounting portion 62 in the vicinity of the discharge hole 65 formed on the front side of the water flow to the bottom surface 30 with a screw 63, the water channel member 60 is Fix to the opening 66.

  Although not shown in the drawings, the flow channel member 60 is chamfered at the corners of the portion facing the flow of the cleaning water so as not to give resistance to the cleaning water as much as possible.

  As shown by the arrows, the flush water member 60 flows through the downward inclined flow channel portion 64 of the flush channel member 60 from the discharge hole 65 at the tip of the flush water 17 flowing through the rim water channel 10 without being attenuated. It can be discharged into the concave groove 5.

  Here, the water flow channel member 60 is made of, for example, a resin, metal, ceramic, or a composite material thereof, and more preferably is manufactured in a uniform shape and a uniform size as a molded product made of hard rubber or silicon.

  With this flow channel member 60 as a detachable nozzle, it is possible to select the optimal flow channel member 64 suitable for the water supply pressure at the time of use.

  As mentioned above, although embodiment of this invention was described based on drawing, all said Example showed an example of this invention, and it cannot be overemphasized that this invention should not be limited to these. Absent.

  For example, the flow of cleaning water in the bowl 3 can be reversed. In that case, the position of the supply port 15 of the annular (rim) water supply channel 10 is set on the opposite side, and the mounting direction of the nozzle 9 may be reversed.

  The dimensions of the substantially rectangular cross-sectional shape of the concave groove 5 are such that the length S of the lower side surface 6 and the upper side surface 7 is 20 mm and the length T of the bottom 13 of the concave groove 5 is about 25 mm. It is determined as appropriate according to conditions such as the water pressure and water volume in the area where the toilet is installed.

    Similarly, the injection axis 18 of the nozzle hole E is set to an inclination angle α = approximately 5 degrees with respect to the annular (rim) water supply passage 10, but this angle is appropriately determined based on the shape of the concave groove 5 and the annular shape.

2A is a cross-sectional view of a seat-type toilet according to the first embodiment of the present invention, and FIG. It is AA sectional drawing in FIG. 1 of the seat type toilet bowl in the 1st Embodiment of this invention. It is BB sectional drawing in FIG. 1 of the seat type toilet bowl in the 1st Embodiment of this invention. It is sectional drawing of the nozzle of the seat type toilet bowl in the 1st Embodiment of this invention. It is sectional drawing which shows the state through which wash water flows in the bowl of the seat type toilet bowl in the 1st Embodiment of this invention. It is a perspective view which shows the state through which the wash water flows in the bowl of the seat type toilet bowl in the 1st Embodiment of this invention. It is sectional drawing of the nozzle of the seat type toilet bowl in the 2nd Embodiment of this invention. It is sectional drawing of the conventional seat-type toilet bowl. It is a perspective view which shows the flow of the washing water of the other conventional seat-type toilet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat type toilet bowl 2 Toilet bowl body 3 Bowl 4 Upper end part 5 Concave groove 6 Lower side surface 6a Open end part 7 Upper side surface 7a Open end part 8 Inner wall surface 9 Nozzle 11 Central part 11a Flat part 12 Central part

Claims (4)

A flush toilet seat,
An annular concave groove is provided over the entire periphery of the upper end of the bowl of the toilet bowl body, and the opening ends of both side surfaces of the annular concave groove are continuous with the inner wall surface of the bowl, and the concave groove has a substantially rectangular cross-sectional shape. A flat portion at least in the center of the lower side surface;
In order to clean the inner wall surface of the bowl, a plurality of nozzles for injecting cleaning water into the annular concave groove are provided at the center of the upper side surface of the concave groove in the same direction of the annular groove. A seat-type toilet.   2. The seat-type toilet according to claim 1, wherein in order to supply cleaning water to be injected into the concave groove, the upper side surface of the concave groove is disposed on a single wall surface immediately above the upper side surface of the concave groove. A seat-type toilet comprising an annular (rim) water supply channel molded integrally with the bowl.   The seat-type toilet according to claim 1 or 2, wherein the nozzle is a nozzle that is integrally formed on an upper side surface of the concave groove.   The seat-type toilet according to claim 1 or 2, wherein the nozzle is a nozzle that is detachably attached to an upper side surface of the concave groove.

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