JP5305218B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that supplies flush water to the toilet, cleans the toilet, and discharges filth.

2. Description of the Related Art Conventionally, in flush toilets, an effective washing configuration has been widely used in which a swirling flow in a substantially horizontal direction is applied to stored water to collect filth in the vicinity of the center and then discharged to the outside at once by siphon action.
Furthermore, in recent years, as shown in Patent Document 1, a water outlet is provided at the boundary between the ball surface of the toilet bowl and the rim at the upper edge, and the cleaning water is discharged from the water outlet in a substantially horizontal direction. Flush toilets that wash around the entire circumference are also used.

JP 2002-97704 A

These conventional flush toilets that discharge water in a substantially horizontal direction have the advantage that the water is discharged in a substantially horizontal direction, so that swirling water is easily provided, and filth is easily collected. is there.
However, if the horizontal turning force applied to the stored water is too strong, most of the washing water including the stored water is lifted up around the bowl, and at this time, the swirling center of the stored water has an inverted conical shape. It will be deeply dented. Since the washing water is pushed up around the periphery of the bowl and this recess is an air layer, the amount of water supplied to the inlet of the drain trap pipe is reduced, so that it is discharged from the drain trap pipe. This also reduces the amount of cleaning water.

In particular, in a toilet using the siphon action, the lower end of the recessed air layer is close to the drain trap pipe inlet, and air is easily sucked into the drain trap pipe from the air layer. And the action of drawing dirt is reduced.
Furthermore, if a strong swirling flow is applied to the stored water, the floating filth is pushed out of the swirling flow and stagnates outside the swirling flow, so that the timing of being sucked into the inlet of the drain trap pipe is delayed. There is a problem that even if toilet cleaning is completed and the accumulated water returns, it remains on the accumulated water.

  Therefore, the present invention has been made to solve the problems of the conventional structure, and the amount of washing water flowing into the drain trap pipe without giving an excessive substantially horizontal turning force to the stored water. An object of the present invention is to provide a flush toilet in which suspended filth is prevented from remaining in stored water.

In order to achieve the above object, the present invention is a flush toilet that supplies flush water to a toilet and cleans the toilet to discharge filth, the filth receiving surface, a rim portion at the upper edge, A bowl portion having a shelf portion formed between the rim portion and the filth receiving surface, and water is discharged on the shelf portion of the bowl portion to form a swirling flow, and the water discharge direction is the forward direction of the toilet. A water discharge portion, and a drain trap pipe having an inlet connected to a lower portion of the bowl portion for discharging filth, and a concave portion provided above the position of the water storage surface of the filth receiving surface of the bowl portion. The upper edge portion is formed in a substantially rectangular shape so that its longitudinal direction is along the water discharge direction of the wash water from the water discharge portion, and the wall portion rising from the lower end portion of the recess to the upper edge portion is substantially rectangular over the entire circumference. It is characterized by being formed into a shape .
In the present invention configured as described above, since the concave portion is formed above the position of the water collecting surface of the filth receiving surface of the bowl portion, the wash water discharged from the water discharging portion flows into the concave portion while turning, Since a part of energy is lost when the flow changes from the short side direction to the long side direction, the momentum of the swirl flow is weakened. The flow of washing water is changed to a flow from the front of the toilet in the long side to the rear and a flow from the rear of the toilet to the front, so that floating waste that floats on the stored water is trapped under the stored water and drained. An effective flow in the direction of the trap pipe inlet can be formed. When the momentum of the swirl flow is weakened, the vortex (air column) formed in the concave portion is reduced, and the amount of water supplied to the drain trap pipe inlet is increased. Moreover, in the toilet using the siphon action, the reduction of the siphon action can be prevented.

In the present invention, preferably, the drain wrap conduit is configured to discharge waste by siphon action.
In the present invention configured as described above, the vortex (air column) formed in the concave portion is reduced due to the weak momentum of the swirling flow, and the amount of water supplied to the drain trap pipe inlet increases. Therefore, reduction of siphon action can be prevented.

  In the present invention, the rectangular shape of the recess preferably has a ratio of the long side B to the short side C in the range of 1: 1.1 to 1: 1.6.

  In the present invention, preferably, the rectangular shape of the recess has four corners as R parts, and these R parts are formed with a radius of curvature of 10 mm to 40 mm.

  In the present invention, preferably, in the rectangular shape of the recess, the four corner portions are the first R portion, the second R portion, the third R portion, and the fourth R portion along the water discharge direction of the wash water from the water discharge portion. At this time, a line connecting the first R part and the second R part and a line connecting the third R part and the fourth R part are formed with a radius of curvature or a straight line of 100 mm or more.

  In this invention, Preferably, the height of a recessed part is 32-60 mm from a stored water surface.

  According to the flush toilet of the present invention, since excessive swiveling force in the horizontal direction is not applied to the stored water, it is possible to prevent a reduction in the amount of washing water flowing into the drain trap pipe and to float floating filth There are excellent effects such as preventing the water from remaining in the accumulated water.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention, FIG. 2 is a side sectional view of a flush toilet according to an embodiment of the present invention, and FIG. 3 is according to an embodiment of the present invention. FIG. 4 is an enlarged partial plan view showing a concave portion of a bowl portion of a flush toilet, and FIG. 4 is an enlarged partial sectional view showing a concave portion of a bowl portion of a flush toilet according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, a flush toilet 1 according to an embodiment of the present invention includes a toilet body 2 and a low tank 4 that stores wash water integrally formed with the toilet body 2.
The low tank 4 includes a rim tank 6 and a jet tank 8, and a rim drain valve 10 and a jet drain valve 12 are provided in the rim tank 6 and the jet tank 8, respectively. In this embodiment, the rim tank 6 is formed integrally with the toilet body, but may be formed as a separate body.

  A bowl portion 14 is formed at the front upper portion of the toilet body 2, a rim conduit 16 and a jet conduit 18 are formed at the rear upper portion, and a drain trap conduit 20 is provided below the bowl portion 14. Is formed.

  The bowl portion 14 includes a filth receiving surface 22, a rim 24 constituting an upper edge portion thereof, and a shelf portion 26 formed between the filth receiving surface 22 and the rim 24. The inner surface 24a of the rim 24 has a shape that overhangs inward so that the washing water does not jump out. In the flush toilet of the present embodiment, the rim tank 6 which is a tank dedicated to the rim is provided, and the head (water level height) is low, so the wash water discharged from the rim spout 32 described later is Stable with low instantaneous flow rate. Therefore, it is not always necessary to overhang the rim shape toward the inside, and even when the rim shape is not overhanged, it is possible to prevent the washing water from jumping out of the toilet bowl.

  A concave portion 28, which will be described in detail later, is formed in a portion of the bowl portion 14 where the accumulated water on the filth receiving surface 22 is stored. Further, below the concave portion 28, the inlet 20a of the drain trap pipe 20 described above is opened, the rising pipe 20b extends rearward from the inlet 20a, and the down pipe 20d is continuously formed through the top 20c. The lower end of the descending pipe 20d is connected to a discharge pipe (not shown) via a drain socket 30.

  Here, the first rim spouting port 32 is formed in the shelf portion 26 of the bowl portion 14 so that the water discharge direction A is the forward direction of the toilet bowl. The first rim water spouting port 32 is formed on the rear left side as viewed from the front. From the first rim spout 32, the wash water stored in the rim tank 6 is discharged in a substantially horizontal direction toward the bowl portion 14 through the rim conduit 16.

  Further, a second rim spout 34 is formed in a direction along a direction substantially perpendicular to the longitudinal direction of the toilet on the right side when viewed from the front of the shelf portion 26 of the bowl portion 14. Similarly, the cleaning water stored in the rim tank 6 is also discharged from the second rim spout 34 through the rim conduit 16 toward the bowl portion 14 from the first rim spout 32. Water is discharged in a substantially horizontal direction so as to form a swirl flow in the same direction as the swirl flow formed by water. The second rim spout 34 need not be provided. In that case, the wash water is discharged from only the first rim spout 32.

  Next, a jet spout 35 is formed at the inlet 20a of the drain trap pipe 20 through which washing water flows from the left side when viewed from the front. From this jet spout 35, the wash water stored in the jet tank 8 is discharged through the jet conduit 18 in a direction substantially perpendicular to the toilet longitudinal direction in plan view.

  Next, the above-described recess 28 of the bowl portion 14 will be described in detail with reference to FIGS. As shown in FIG. 3, the concave portion 28 of the bowl portion 14 is formed in a substantially rectangular shape so that the longitudinal direction of the upper edge portion 28 a is along the water discharge direction A of the wash water from the first rim water discharge port 32. Yes. The rectangular shape of the recess 28 is preferably such that the ratio of the long side B to the short side C is in the range of 1: 1.1 to 1: 1.6.

  Further, the rectangular shape of the concave portion 28 of the bowl portion 14 is formed such that four corner portions are formed as R portions, and these R portions are arranged along the discharge direction A of the wash water from the first rim water discharge port 32 as the first R portion. 36, the 2nd R part 38, the 3rd R part 40, and the 4th R part 42, each of these R parts 36, 38, 40, and 42 are formed by the curvature radius of 10 mm-40 mm.

  Further, the rectangular shape of the concave portion 28 of the bowl portion 14 is such that a line C1 connecting the first R portion 36 and the second R portion 38 and a line C2 connecting the third R portion 40 and the fourth R portion 42 are a radius of curvature or a straight line of 100 mm or more. Forming.

Next, as shown in FIG. 2, the level of the lower end portion of the concave portion 28 of the bowl portion 14 substantially coincides with the level of the lower end of the top portion 20 c of the drain trap pipe 20.
Moreover, as shown in FIG. 4, the height H of the recessed part 28 of the bowl part 14 from a stored water surface to a recessed part upper edge is about 47 mm, Preferably, it is 32-60 mm. Here, the lower limit value of the height H of the recess 28 is set to 32 mm because the pipe diameter D of the top 20c of the drain trap pipe 20 is 63 mm, and the water level rises to near the upper edge of the recess 28. At this time, if more than half of the pipe diameter D is not full, efficient washing water drainage is not performed, and siphon toilets do not have an efficient siphoning action and an efficient water washing function is not exhibited. It is.

Next, the operation of the flush toilet according to the above-described embodiment of the present invention will be described.
Here, referring to FIG. 5, the operation of a conventional flush toilet without a recess formed in the bowl portion will be described first. As shown in FIG. 5, in the conventional flush toilet, the bottom part of the bowl part 14 of the toilet bowl body has a simple bowl shape. Therefore, in the conventional flush toilet, when the substantially horizontal turning force applied to the stored water is too strong, the stored water is pushed up around the periphery of the bowl portion 14, and a drain trap is provided at the center of the stored water. A deep acute inverted cone-shaped recess E reaching near the pipe inlet 20a is formed. The accumulated water is pushed up around the periphery of the bowl portion 14, and the dent E is an air layer, so that the amount of washing water flowing into the inlet 20a of the drain trap pipe 20 is reduced. In particular, in the case of a siphon toilet bowl in which a siphon action is generated by the drain trap pipe 20, when the air layer of the recess E is sucked into the drain trap pipe, the siphon action is reduced and the action of drawing in filth is reduced. .

  In contrast, in the flush toilet of the present embodiment, first, the wash water discharged from the first rim spout 32 is washed while turning the bowl portion 14. At this time, as shown in FIG. 6, in the present embodiment, the concave portion 28 having a substantially rectangular shape is formed in the portion of the bowl portion 14 of the toilet body 2 in which the sewage receiving surface 22 of the sewage receiving surface 22 is stored. A part (flow F) first enters the region of the first R portion 36 of the recess 28, flows along the wall portion of the line C1, and the flow of the washing water turns approximately 90 degrees in the region of the second R portion 38. By doing so, a part of energy is lost and the momentum of the swirl flow is reduced. The flow is changed from the front of the toilet to the long side of the rear, and the filth in the floating system on the stored water is pushed into the stored water while flowing downward toward the inlet 20a of the drain trap pipe 20.

  In this way, a part of the washing water (flow F) loses a part of the energy by turning almost 90 degrees in the region of the second R portion 38 and falls downward. At this time, the second R The remaining portion of the wash water (flow G) that did not flow into the portion 38 and swirled above the filth receiving surface 22 of the bowl portion 14 enters the region of the third R portion 40 of the recess 28 and enters the wall portion of the line C2. In the region of the fourth R portion 42, the flow of the washing water changes direction by approximately 90 degrees, so that a part of the energy is lost and the momentum of the swirling flow is reduced. The flow changes while flowing from the rear of the toilet to the front long side and falls below the flow F so as to push the floating filth on the stored water into the stored water.

  Thus, in this embodiment, the wash water is separated into the two flows F and G by the recess 28 formed in the filth receiving surface 22 of the bowl portion 14, and the energy of each of the flows F and G is the second R. By changing the direction by approximately 90 degrees by the portion 38 and the fourth R portion 42, it is effectively reduced. Since the momentum of the swirling flow of washing water can be reduced, the vortex (air column) formed in the recess 28 is reduced, and the amount of washing water supplied to the inlet 20a of the drain trap pipe 20 is increased. As a result, the filth can be collected at the center of the bowl portion 14 and reliably discharged from the drain trap pipe 20.

  As a result, in this embodiment, the substantially horizontal turning force applied to the stored water is reduced, so that the stored water is not pushed up around the bowl portion 14 as shown in FIG. A shallow obtuse inverted conical recess J is formed at the center of the water swirl. The position of the bottom of the recess J is higher than the position of the top portion 20 c of the drain trap pipe 20. For this reason, the stored water can easily fall into the descending pipe 20 d of the drain trap pipe 20. Moreover, since this dent J has an air layer smaller than the conventional flush toilet, the wash water including the stored water flowing into the inlet 20a of the drain trap pipe 20 can be effectively discharged. Further, the amount of air sucked into the drain trap pipe 20 is small, and in the siphon toilet, the siphon action is effectively generated, and the action of drawing in filth is increased.

  The present invention is applicable to various flush toilets other than the tank-integrated flush toilet described above. The present invention can be applied not only to a separate tank flush toilet or a flush valve, but also to, for example, a directly connected flush toilet that supplies flush water directly from the water supply. Further, the rim spout can be applied to a flush toilet that supplies wash water directly from the water supply and the jet spout from the tank. Furthermore, it is applicable also to the flush toilet of the type which does not provide a jet spout.

1 is a plan view of a flush toilet according to an embodiment of the present invention. It is side surface sectional drawing of the flush toilet bowl by embodiment of this invention. It is an enlarged partial top view which shows the recessed part of the bowl part of the flush toilet bowl by embodiment of this invention. It is an expanded partial sectional view which shows the recessed part of the bowl part of the flush toilet bowl by embodiment of this invention. It is the partial side surface cross-section schematic which shows the conventional flush toilet. It is a perspective view which shows the mode of the flow of the washing water in the recessed part of the flush toilet bowl by embodiment of this invention. It is the partial side surface cross-section schematic which shows the flush toilet bowl by embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Low tank 14 Bowl part 20 Drain trap conduit 22 Soil receiving surface 24 Rim 26 Shelf part 28 Recess 32 First rim spout 34 Second rim spout 35 Jet spout 36 First R part 38 First 2R part 40 3R part 42 4th R part A Water discharge direction B Long side of recess C Short side of recess H Height of recess

Claims (6)

A flush toilet that supplies flush water to a toilet, cleans the toilet and discharges filth,
A bowl portion comprising a filth receiving surface, a rim portion at the upper edge, and a shelf formed between the rim portion and the filth receiving surface;
A water discharge part which discharges washing water on the shelf part of the bowl part to form a swirling flow and whose water discharge direction is the forward direction of the toilet,
A drain trap pipe for connecting the inlet to the bottom of the bowl part and discharging the filth,
A concave portion is provided in the upper part of the bowl portion above the sewage receiving surface, and the upper edge of the concave portion is formed in a substantially rectangular shape so that its longitudinal direction is along the direction of water discharge from the water discharge portion. A flush toilet characterized in that the wall portion rising from the lower end portion to the upper edge portion of the recess is formed in a substantially rectangular shape over the entire circumference .   2. The flush toilet according to claim 1, wherein the drain trap pipe is configured to discharge filth by siphon action.   The flush toilet according to claim 1 or 2, wherein the rectangular shape of the recess has a ratio of a long side to a short side in a range of 1: 1.1 to 1: 1.6.   The flush toilet according to any one of claims 1 to 3, wherein the rectangular shape of the concave portion has four corner portions as R portions, and these R portions are formed with a radius of curvature of 10 mm to 40 mm. .   The rectangular shape of the concave portion is the first R when the four corner portions are the first R portion, the second R portion, the third R portion, and the fourth R portion along the water discharge direction of the cleaning water from the water discharge portion. The flush toilet according to claim 4, wherein a line connecting the part and the second R part and a line connecting the third R part and the fourth R part are formed with a radius of curvature or a straight line of 100 mm or more.   The flush toilet according to any one of claims 1 to 5, wherein a height of the concave portion is 32 to 60 mm from the water storage surface.

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