JP7789568B2 - Toilet hand washing device and toilet bowl - Google Patents

Description

This disclosure relates to a hand washing device for a toilet.

For example, the toilet hand washing device described in Patent Document 1 below comprises a basin and a water discharge device. The water discharge device is attached to the wall on the rear side of the basin. The water discharge device comprises a housing and a cover. A water channel is formed inside the housing. An insertion hole is formed in the wall on the rear side of the basin, allowing a water supply pipe to protrude forward. The housing is connected to the tip of the water supply pipe. The cover is fixed to the housing with fixings such as screws, covers most of the housing, and improves the design.

Japanese Patent Application Laid-Open No. 2017-119987

Installing the water discharge device in the above-mentioned toilet hand washing device is a time-consuming process, as it involves connecting the housing to the water supply pipe and securing the cover. There is a demand for improved design and ease of installation for toilet hand washing devices.

This disclosure was completed based on the above circumstances, and aims to provide a toilet hand washing device that offers good design and ease of installation.

The hand washing device for a toilet disclosed herein comprises a basin, a water discharge section having a front wall and a rear wall with a storage space formed between the front wall and the rear wall, an outflow section provided in the front wall with an outlet formed therein for discharging water toward the basin, and a water passage section disposed in the storage space with a water passageway formed therein for water to flow to the outlet, and the portion of the water passage section extending from the front wall toward the rear wall is disposed in the storage space from the rear side of the front wall.

FIG. 1 is a perspective view showing a toilet hand washing device attached to the top of a toilet flushing tank; Front view of a toilet hand washing device Rear view of a toilet hand washing device Cross-sectional view showing a hand washing device for a toilet An enlarged cross-sectional view of a portion of a toilet hand washing device showing the vicinity of the outlet FIG. 10 is a partially enlarged rear view of the toilet hand washing device showing how the water-permeable member is stored through the opening. FIG. 5 is a partially enlarged perspective cross-sectional view of the toilet hand washing device showing the fixing structure of the water-passing member, taken along the line A-A in FIG. 4; A side view showing the water-permeable member Front view showing the water-permeable member

<Embodiment>
As shown in Figure 1, the toilet hand washing device 10 is attached as a lid to the top of the toilet flush tank 11. The toilet flush tank 11 is provided at the rear of the toilet 12. The toilet flush tank 11 stores flush water to be supplied into the toilet 12.

In the following explanation, the upper side when attached to the toilet flushing tank 11 will be referred to as the upper side, the lower side as the lower side, the front side as the front side, the back side as the rear side, and the right side and left side as the right side when viewed from the front of the toilet hand washing device 10. The positive side of the X axis shown in the drawings is the front side, the negative side of the X axis is the rear side, the positive side of the Y axis is the upper side, the negative side of the Y axis is the lower side, the positive side of the Z axis is the right side, and the negative side of the Z axis is the left side.

As shown in Figures 1 to 3, the toilet hand washing device 10 comprises a basin portion 20, a water discharge portion 30, and a water-permeable member 50. The water discharge portion 30 discharges a portion of the water supplied from outside the toilet flushing tank 11 via the water-permeable member 50 into the basin portion 20. The water received in the basin portion 20 is discharged from a drain outlet 21 formed in the bottom portion 25 of the basin portion 20 and stored in the toilet flushing tank 11.

The bowl portion 20 and the water discharge portion 30 are integrally formed from the same material (synthetic resin, ceramics, etc.). As shown in Figure 4, the bowl portion 20 has a front portion 22, a rear portion 23, left and right side portions 24, a bottom portion 25, and an outer peripheral portion 26. The height of the rear portion 23 is greater than the height of the front portion 22. The upper ends of the left and right side portions 24 gradually slope downward from the rear end to the front end. The outer peripheral portion 26 surrounds the outer periphery of the bowl portion 20. The outer peripheral portion 26 has a front portion 27, a rear portion 28, and left and right outer surface portions 29.

As shown in Figure 2, the water discharge section 30 is located in the left-right center of the bowl section 20. The water discharge section 30 is located at the upper end of the rear surface 23 of the bowl section 20. The water discharge section 30 is formed by part of the rear surface 23 of the bowl section 20 protruding forward.

As shown in Figures 2 and 4, the water discharge section 30 has a front wall section 31, a rear wall section 32, left and right side wall sections 33, and an upper wall section 34. The front wall section 31 and the left and right side wall sections 33 are continuous with the rear surface section 23 of the bowl section 20. The rear wall section 32 is formed by the back surface section 28 of the outer peripheral surface section 26 of the bowl section 20. The upper wall section 34 extends forward from the upper end position of the back surface section 28.

As shown in Figure 4, the outer surface 31S of the front wall 31 faces the bowl portion 20. The outer surface 31S of the front wall 31 is a sloped surface that slopes downward toward the rear. The outer surface 31S of the front wall 31 faces the front surface 22 of the bowl portion 20. The front wall 31 and the front surface 22 are approximately parallel. The front wall 31 is formed with a water discharge opening (referred to as the water discharge opening 35) that exposes the outflow port 51 formed in the water-passing member 50. The water discharge portion 30 discharges water downward from the outflow port 51.

As shown in Figure 5, the intersection angle between the circumferential surface 36 of the water discharge opening 35 and the outer surface 31S of the front wall portion 31 (referred to as the opening circumferential surface angle 36α) is smaller at the rear side than at the front side. In Figure 5, the front side is the upper side, and the rear side is the lower side. The circumferential surface 36 of the water discharge opening 35 connects the outer surface 31S of the front wall portion 31 with the inner surface 31U of the front wall portion 31. The opening circumferential surface angle 36α is the angle on a cross section that passes through the center of the water discharge opening 35 and extends in the flow direction of the outflow channel 55 described below. The opening circumferential surface angle 36α is the intersection angle between the tangent to the circumferential surface 36 at the intersection point between the circumferential surface 36 of the water discharge opening 35 and the outer surface 31S of the front wall portion 31 and the tangent to the outer surface 31S. The opening circumferential surface angle 36α gradually decreases from the front end to the rear end of the water discharge opening 35. The lower end of the circumferential surface 36 of the water discharge opening 35 is approximately horizontal in the XY plane. The upper end of the circumferential surface 36 of the water discharge opening 35 is inclined nearly vertically in the XY plane.

As shown in Figure 5, the area of the inner surface 31U of the front wall 31 that follows the circumferential surface 36 of the water discharge opening 35 is a recessed portion 37 that is recessed more than other areas. The recessed portion 37 has a sealing surface 38 that comes into close contact with the sealing member 52. As shown in Figure 6, the sealing surface 38 is annular.

As shown in Figure 4, the interior of the water discharge section 30 is the upper part of the storage space 39 that stores the water-permeable member 50. The upper part of the storage space 39 is surrounded by the front wall 31, the cover 45 (described below), the upper wall 34, and the left and right side walls 33. The lower part of the storage space 39 is formed between the rear surface 23 and rear wall 32 of the bowl section 20. The storage space 39 extends left and right between the rear surface 23 and rear wall 32 of the bowl section 20 and is open downward.

As shown in Figures 6 and 7, the storage space 39 is provided with bosses 41 for fixing the water-permeable member 50. The bosses 41 protrude rearward from the inner surface 31U of the front wall portion 31 (see Figure 4). A pair of bosses 41 are provided on the left and right. The bosses 41 have holes formed in which fasteners 42 such as screws can be screwed in and fitted.

As shown in Figure 6, the inner surface 31U of the front wall portion 31 is provided with ribs 43 that protrude rearward. A pair of ribs 43 are provided on the left and right. Each rib 43 is plate-shaped. The plate surfaces of each rib 43 are parallel to the front-to-rear direction. Each rib 43 is connected to the lower end of a boss 41 and supports the boss 41.

As shown in Figure 6, an opening 44 is formed in the rear wall 32. The opening 44 opens the storage space 39 to the rear of the rear wall 32. The entire periphery of the opening 44 is closed. The opening 44 is rectangular. The left-right dimension of the opening 44 is greater than the up-down dimension of the opening 44. The opening 44 is closed by a cover 45 (see Figure 4). When attached to the opening 44, the cover 45 forms part of the rear wall 32.

As shown in Figure 4, a water-permeable member 50 is stored in the storage space 39. The water-permeable member 50 is made of a hard material such as synthetic resin. The water-permeable member 50 is fixed to a boss 41 in the storage space 39 with a fastener 42. The lower end of the water-permeable member 50 is connected to a water supply pipe (not shown) inside the toilet flushing tank 11.

As shown in Figure 4, the water-permeable member 50 has an outflow section 53 and a water-passing section 54. The outflow section 53 is formed with an outflow port 51 and an outflow channel 55. The outflow port 51 opens to the tip surface 53F of the outflow section 53. The outflow port 51 discharges water toward the basin section 20. The outflow channel 55 slopes downward toward the outflow port 51.

As shown in Figure 5, the outflow section 53 has a tip section 53A and a rear section 53B that continues to the rear of the tip section 53A. The tip section 53A protrudes outward from the front wall section 31. The tip surface 53F of the tip section 53A is located outward from the outer surface 31S of the front wall section 31. The rear section 53B is located in the storage space 39. A sealing surface 59 that comes into close contact with the sealing member 52 is formed on the front surface of the rear section 53B. The sealing surface 59 is annular and surrounds the outer peripheral surface of the tip section 53A (see Figure 9). The sealing surface 59 forms a peripheral portion that surrounds the outflow port 51.

As shown in Figure 8, the sealing member 52 is provided at the front end of the water-passing member 50. The sealing member 52 is annular and surrounds the tip end 53A of the outflow section 53 (see Figure 9). The sealing member 52 is interposed between the sealing surface 59 of the rear section 53B and the sealing surface 38 on the periphery of the water discharge opening 35.

As shown in FIG. 4 , the water passage section 54 has a water passage 56 that connects to the upstream end of the outlet passage 55 and conducts water to the outlet port 51. The water passage 56 has a first water passage 57 and a second water passage 58. The first water passage 57 extends substantially horizontally from the upstream end of the outlet passage 55 toward the rear, while the second water passage 58 extends substantially vertically downward from the upstream end of the first water passage 57. The flow path area of the first water passage 57 narrows midway from the upstream side to the downstream side. The downstream portion of the first water passage 57 is referred to as the front water passage 57F, and the upstream portion of the first water passage 57 is referred to as the rear water passage 57R. The flow path area of the front water passage 57F is narrower than the flow path area of the rear water passage 57R. The flow path area of the second water passage 58 is narrower downstream than upstream.

The water-passing member 50 is formed by connecting two separate members separated in the flow path direction. The two members are a first member 61 including the outflow section 53, and a second member 62 connected to the rear side of the first member 61. The first member 61 has an outflow channel 55 and a front water passage 57F formed inside. The second member 62 has a rear water passage 57R and a second water passage 58 formed inside.

The first member 61 and the second member 62 are connected to each other and fixed with an adhesive. When the first member 61 and the second member 62 are connected, the front end of the second member 62 is inserted inside the rear end of the first member 61. The rear end of the first member 61 has a groove 63, and the front end of the second member 62 has a protrusion 64 (see Figure 7). When the first member 61 and the second member 62 are connected, the protrusion 64 fits into the groove 63. The groove 63 is located in the left-right center of the top surface of the first member 61. The protrusion 64 is located in the left-right center of the top surface of the second member 62. The protrusion 64 extends long in the front-to-rear direction. The front end of the protrusion 64 fits into the groove 63, and the portion rearward of this extends rearward from the groove 63.

As shown in Figure 8, the water-passing member 50 has a bent portion 65 between the downstream end 50U and the upstream end 50S. The portion of the water-passing member 50 from the downstream end 50U to the bent portion 65 is referred to as the downstream portion 66, and the portion from the upstream end 50S to the bent portion 65 is referred to as the upstream portion 67. The downstream portion 66 and the upstream portion 67 are generally perpendicular to each other. The bent portion 65 includes the rear end of the downstream portion 66 and the upper end of the upstream portion 67.

The length dimension L1 of the downstream portion 66 is smaller than the maximum dimension L2 of the opening width of the opening 44. The length dimension L1 of the downstream portion 66 is the dimension from the front end of the outlet portion 53 to the rear end of the downstream portion 66. The front end of the outlet portion 53 is the upper end of the tip surface 53F of the tip portion 53A. The maximum dimension L2 of the opening width of the opening 44 is the length dimension of the diagonal of the opening 44, as shown in Figure 3. The length dimension L3 of the upstream portion 67 is larger than the maximum dimension L2 of the opening width of the opening 44 (see Figure 6). The length dimension L3 of the upstream portion 67 is the length dimension from the upper end of the upstream portion 67 to the lower end of the upstream portion 67.

As shown in Figure 6, the water-permeable member 50 is placed in the storage space 39 through the opening 44. Specifically, the water-permeable member 50 is inserted into the storage space 39 with the bottom end first, tilted along the diagonal of the opening 44.

As shown in FIG. 7, the water-permeable member 50 has a fixing portion 68 that is fixed to the boss 41 of the front wall portion 31 by a fixing device 42. As shown in FIG. 9, the fixing portion 68 is provided on the second member 62. A pair of fixing portions 68 are provided on the left and right. The fixing portion 68 is cylindrical and accommodates the fixing device 42 inside.

The water-permeable member 50 has recesses 69 that fit into the ribs 43. The recesses 69 are provided in both the left and right fixing portions 68. The recesses 69 are recessed from the front end of the fixing portion 68 to the rear. The recesses 69 penetrate the fixing portion 68 in the vertical direction.

The embodiment configured as described above provides the following advantages. The toilet hand washing device 10 comprises a basin portion 20, a water discharge portion 30, an outflow portion 53, and a water passage portion 54. The water discharge portion 30 has a front wall portion 31 and a rear wall portion 32. A storage space 39 is formed between the front wall portion 31 and the rear wall portion 32. The outflow portion 53 is provided in the front wall portion 31. An outflow outlet 51 is formed in the outflow portion 53, through which water flows toward the basin portion 20. The water passage portion 54 is located in the storage space 39. A water passage channel 56 is formed in the water passage portion 54, through which water flows to the outflow outlet 51. The portion of the water passage portion 54 extending from the front wall portion 31 toward the rear wall portion 32 is located in the storage space 39 from the rear side of the front wall portion 31.

With this configuration, the portion of the water passage section 54 extending from the front wall section 31 toward the rear wall section 32 is covered by the front wall section 31, improving the design without having to attach a cover to the front side of the water passage section, and since no cover is required, improving construction. Therefore, both the design and construction can be improved.

The water passage section 54 has a first member 61 and a second member 62 that are divided in the flow path direction. Of the first member 61 and second member 62, the first member 61, which includes the outflow section 53, is positioned in the storage space 39 from the rear side of the front wall section 31. With this configuration, most of the water passage section 54 is positioned in the storage space 39 from the rear side of the front wall section 31.

The portion of the water passage section 54 forward of the center in the front-to-rear direction is positioned from the rear of the front wall section 31 into the storage space 39. With this configuration, most of the water passage section 54 is positioned from the rear of the front wall section 31 into the storage space 39.

An opening 44 is formed in the rear wall portion 32. The water-permeable member 50 is placed in the storage space 39 through the opening 44. This configuration makes it easy to place the water-permeable member 50 in the storage space 39, thereby improving workability.

The water-permeable member 50 has a bent portion 65 between the downstream end 50U and the upstream end 50S. The maximum opening width L2 of the opening 44 is greater than the length L1 from the downstream end 50U to the bent portion 65 and less than the length L3 from the upstream end 50S to the bent portion 65. This configuration allows the water-permeable member 50 to be positioned in the storage space 39 through the opening 44 while minimizing the size of the opening 44.

The outflow section 53 and the water passage section 54 are formed as a single unit. This configuration allows the outflow section 53 to be attached together with the water passage section 54, thereby improving workability.

A water discharge opening 35 that exposes the outlet 51 is formed in the front wall 31. The toilet hand washing device 10 is equipped with a seal member 52 interposed between the peripheral edge of the outlet 51 in the outflow section 53 and the peripheral edge of the water discharge opening 35 in the front wall 31. This configuration prevents water flowing out from the outlet 51 from leaking inside the front wall 31.

The area of the inner surface 31U of the front wall 31 that runs along the periphery of the water discharge opening 35 is a recessed portion 37 that is recessed more than other areas. With this configuration, the outflow portion 53 can be easily positioned by fitting the sealing member 52 into the recessed portion 37.

The outer surface 31S of the front wall 31 is a sloped surface that slopes downward toward the rear. The opening peripheral surface angle 36α is smaller at the rear side than at the front side. With this configuration, the opening width of the water discharge opening 35 is larger on the inner surface 31U side of the front wall 31 than on the outer surface 31S side. This improves the appearance of the toilet hand washing device 10 from the front.

The opening peripheral angle 36α gradually decreases from the front end to the rear end of the water discharge opening 35. This configuration improves the design of the toilet hand washing device 10 when viewed from the front.

A rib 43 protruding rearward is provided on the rear surface of the front wall 31. The water passage 54 has a recess 69 that fits into the rib 43. With this configuration, the water passage 54 can be prevented from rotating by fitting the recess 69 into the rib 43.

A boss 41 is provided on the rear surface of the front wall 31 to secure the water passage 54. The rib 43 supports the boss 41. With this configuration, the rib 43 increases the strength of the boss 41, thereby improving durability.

The first member 61 and the second member 62 are connected in the flow path direction. The first member 61 has a groove 63, and the second member 62 has a protrusion 64 that fits into the groove 63. With this configuration, the first member 61 and the second member 62 can be easily connected by fitting the groove 63 and the protrusion 64 together.

The bowl portion 20 and the water discharge portion 30 are formed as a single unit. With this configuration, there is no groove-like seam at the boundary between the bowl portion 20 and the water discharge portion 30, improving cleanability and design.

<Other Embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.
(1) In the above embodiment, the outflow portion 53 and the water passage portion 54 are integrally formed. However, this is not limiting, and the outflow portion and the water passage portion may be formed separately. In this case, the outflow portion may be attached to the water discharge opening from the front of the front wall portion.
(2) In the above embodiment, the entire water passage portion 54 is attached from the rear side of the front wall portion 31. However, this is not limiting, and the front end portion of the water passage portion may be attached from the front side of the front wall portion.
(3) In the above embodiment, the water-permeable member 50 is stored in the storage space 39 through the opening 44 in the rear wall portion 32. However, the water-permeable member may be stored in the storage space from any direction behind the front wall portion. For example, the water-permeable member may be stored in the storage space from the opening at the bottom, or from either the left or right side.
(4) In the above embodiment, the water flow section 54 has two members divided in the flow path direction. However, the water flow section is not limited to this, and may not be divided in the flow path direction, or may have three or more members divided in the flow path direction.
(5) In the above embodiment, the water-permeable member 50 has the bent portion 65. However, the water-permeable member does not have to have a bent portion. For example, the water-permeable member may have a curved shape that follows the front wall of the water discharger and the rear surface of the bowl.
(6) In the above embodiment, the opening peripheral surface angle 36α is smaller on the rear side than on the front side. However, the opening peripheral surface angle may be changed as appropriate by changing the inclination angle of the outer surface of the front wall portion, etc.
(7) In the above embodiment, the tip surface 53F of the outflow portion 53 is located outward from the outer surface 31S of the front wall portion 31. However, the tip surface of the outflow portion may be flush with the outer surface of the front wall portion, or may be located inward from the outer surface of the front wall portion.
(8) In the above embodiment, the outer surface 31S of the front wall portion 31 is inclined downward toward the rear. However, the outer surface of the front wall portion may be substantially horizontal or substantially vertical.
(9) In the above embodiment, the outflow channel 55 extends obliquely upward from the outflow port 51. However, the outflow channel is not limited to this and may extend, for example, in the vertical direction or the horizontal direction.

L1...length from downstream end to bend, L2...maximum opening width, L3...length from upstream end to bend, 10...toilet hand washing device, 20...basin, 30...spoutlet, 31...front wall, 31S...outer surface of front wall, 31U...inner surface of front wall, 32...rear wall, 35...spoutlet opening, 36...periphery of spoutlet opening, 36α...intersection angle, 37...recess, 39...storage space, 41...boss, 43...rib, 44...opening, 51...outlet, 52...sealing member, 53...outlet, 54...water passage, 56...water passage, 61...first member(s), 62...second member(s), 63...groove, 64...protrusion, 65...bend, 69...recess

Claims (12)

The bowl and
a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl ;
an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion;
a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet;
Equipped with
a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion;
an opening formed in the rear wall;
A hand washing device for a toilet , wherein a portion of the water passage portion extending from the front wall portion toward the rear wall portion is placed in the storage space through the opening . The water flow section has a plurality of members divided in the flow path direction,
The hand washing device for a toilet according to claim 1, wherein the member among the plurality of members that is connected immediately upstream of the outflow portion is arranged in the storage space from the rear side of the front wall portion. A hand washing device for a toilet according to any one of claims 1 to 2, wherein the portion of the water passage section forward of the center in the front-to-rear direction is positioned from the rear side of the front wall section into the storage space. a portion of the water passage that passes through the opening and is disposed in the storage space has a bent portion between a downstream end and an upstream end,
A toilet hand washing device as described in any one of claims 1 to 3, wherein the maximum dimension of the opening width of the opening is greater than the length dimension from the downstream end to the bent portion and smaller than the length dimension from the upstream end to the bent portion . The hand washing device for a toilet according to any one of claims 1 to 4 , wherein the outflow portion and the water passage portion are integrally formed. The bowl and
a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl;
an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion;
a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet;
Equipped with
a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion;
The front wall portion is formed with a water discharge opening that exposes the outlet,
a seal member interposed between a peripheral edge of the outlet port of the outflow portion and a peripheral edge of the water discharge opening of the front wall portion,
A hand washing device for a toilet , wherein an area of the inner surface of the front wall portion along the periphery of the water discharge opening is a recessed portion that is recessed more than other areas. The front wall portion is formed with a water discharge opening that exposes the outlet,
The outer surface of the front wall portion is an inclined surface that slopes downward toward the rear,
The hand washing device for a toilet according to any one of claims 1 to 6 , wherein an angle of intersection between the peripheral surface of the water discharge opening and the outer surface of the front wall portion is smaller on the rear side than on the front side. The intersection angle gradually decreases from the front end to the rear end of the water discharge opening.
A hand washing device for a toilet according to claim 7 . The bowl and
a water discharger having a front wall and a rear wall, a storage space being formed between the front wall and the rear wall, and integrally formed with the bowl;
an outflow portion provided in the front wall portion and having an outflow port formed therein through which water flows out toward the basin portion;
a water passage portion disposed in the storage space and having a water passage formed therein that passes water through the outlet;
Equipped with
a portion of the water passage portion extending from the front wall portion toward the rear wall portion is disposed in the storage space from the rear side of the front wall portion;
A rib protruding rearward is provided on the rear surface of the front wall portion,
The water passage portion has a recess that fits into the rib , and the hand washing device for a toilet . A boss for fixing the water passage portion is provided on the rear surface of the front wall portion,
The toilet hand washing device of claim 9 , wherein the rib supports the boss. The water flow section has a plurality of members divided in the flow path direction,
The plurality of members are connected in the flow path direction,
The hand washing device for a toilet according to any one of claims 1 to 10 , wherein one of the members to be connected to each other has a groove portion, and the other has a protrusion that fits into the groove portion. A toilet comprising a toilet flushing tank equipped with the toilet hand washing device according to any one of claims 1 to 11.