JP6214173B2 - Toilet bowl - Google Patents

Description

  The present invention relates to a toilet bowl, and more particularly to a toilet bowl suitable for a negative pressure suction type toilet.

  For example, Patent Document 1 discloses a negative pressure suction toilet. The negative pressure suction type toilet disclosed in Patent Document 1 is provided in a toilet, a drain pipe connected to a drain outlet of the toilet, a negative pressure tank connected to the other end of the drain pipe, and a drain pipe Open / close valve. Then, in the state where waste and wastewater are collected in the toilet bowl, the negative pressure tank is set to a negative pressure and the on-off valve is opened, so that the waste and wastewater collected in the toilet bowl are sucked and conveyed to the negative pressure tank through the drain line. It has become so. Negative pressure suction toilets are also disclosed in Patent Documents 2 to 4, for example.

  In addition, a portable toilet that is used beside a bed or a bed is also known (for example, Patent Document 5). These portable toilets are used by elderly people and sick people who need care for defecation.

JP-A-10-195960 Japanese Patent Publication No.55-27938 JP 2000-325258 A JP 2001-317105 A JP 2010-240165 A

  Portable toilets are used as simple toilets that can be placed next to a bed or bed and used by elderly people and the sick who cannot go to the toilet on their own. A portable toilet is placed next to a bed or bed, and a container such as a bucket that receives excrement is installed in the toilet bowl, and is usually covered. The portable toilet is pre-filled with water, and the user opens the lid and uses the lid after use. The caregiver removes the container containing the excrement, throws it away in the toilet, cleans the container, and sets it again.

  Such portable toilets are liable to produce odors by simply covering the containers that have received excrement. Also, it is a burden for the caregiver to remove the container, go to the toilet, wash the container, and set it again. There is also a mental burden on the cared person.

  For this reason, the present inventor is considering applying a negative pressure suction toilet to the portable toilet. If the portable toilet is a negative pressure suction type toilet, the burden on the caregiver is reduced because there is no work for excrement disposal. Moreover, since the person who is cared for can also handle the excrement by himself / herself, the mental burden is eliminated.

  When applying a negative pressure suction type toilet to a portable toilet, it is necessary to lay a drain pipe for discharging the toilet from a portable toilet installed beside a bed or bed. At this time, the drainage pipe should be as thin as possible so that it can be laid easily. However, human feces usually have feces having a diameter of about 25 mm and a length of about 80 mm. For this reason, if the inner diameter (diameter) of the drainage pipe is reduced to, for example, about 20 mm, it becomes difficult to suck stool. In particular, thick bar-shaped stool tends to clog the pipeline when sucked.

  At this time, if a large amount of water is injected, the clogging of the stool can be somewhat eliminated. However, there are many cases where a water pipe is not installed at a place where a portable toilet is installed, and it is very expensive to draw a new water pipe. For this reason, it is desired that the standard excrement can be discharged from the toilet bowl by one suction with water that can be easily poured by the user (for example, water of about 500 mL). In addition, if it is about 500 mL of water, it can be prepared with a commercially available PET bottle, and does not take a place for storage and is not so heavy, so even a care recipient can handle it.

  Thus, when applying a negative pressure suction type toilet to a portable toilet, it is required that the drainage pipe is constructed in a compact manner and that it can be smoothly drained with little water injection. Furthermore, in order for the negative pressure suction type toilet to become widespread, it is desirable that the toilet is easy to use and inexpensive. As for the negative pressure suction toilet, there are various proposals as mentioned in the patent literature, but it is not fully satisfactory in terms of downsizing and cost reduction.

  The proposed negative pressure suction toilet has a toilet body with a discharge port at the bottom, a negative pressure tank connected to the discharge port of the toilet body through a drain line, and a connection between the negative pressure tank and the toilet body. An opening / closing valve that opens and closes, a vacuum pump attached to the negative pressure tank, a discharge valve that opens and closes a discharge port provided at the bottom of the negative pressure tank, and a control device are provided. Here, the control device executes step A for operating the vacuum pump to bring the negative pressure tank into a negative pressure state, step B for opening the on-off valve, and step C for opening the discharge valve.

  Here, since the opening / closing valve is opened after the pressure reduction of the negative pressure tank is completed, the negative pressure tank can be sucked efficiently. Further, since the discharge valve is opened after the suction by the negative pressure tank is completed, the waste water accumulated in the negative pressure tank is discharged every time the suction is performed. For this reason, the capacity of the negative pressure tank can be reduced.

  Moreover, the negative pressure suction type toilet may include a pressure reducing valve that opens and closes a connection between the negative pressure tank and the vacuum pump. In this case, in Step A, the control device may operate the vacuum pump with the pressure reducing valve opened, and close the pressure reducing valve when stopping the vacuum pump.

  In step C, the control device may open the discharge valve with the on-off valve closed. This prevents the odor in the negative pressure tank from rising on the toilet body.

  Moreover, the negative pressure suction type toilet may include an air release valve that opens the negative pressure tank to the atmosphere. In this case, the control device may open the air release valve in Step C. In this case, the wastewater accumulated in the negative pressure tank is discharged while being released to the atmosphere, and thus is discharged smoothly.

  In step C, the atmosphere release valve may open earlier than the discharge valve. In this case, the wastewater accumulated in the negative pressure tank is discharged in a state where it is surely released to the atmosphere. For this reason, it discharges more smoothly, and the scattering of the waste_water | drain including the sound produced at the time of discharge | emission and the excrement in a negative pressure tank becomes small.

  Moreover, the negative pressure suction type toilet may include a toilet seat provided in the toilet body and a seating sensor that detects that a person is sitting on the toilet seat. In this case, the control device may execute step A by receiving a signal from the seating sensor that detects that a person is sitting on the toilet seat. Further, the control device may execute Step B by receiving a signal from the seating sensor that detects that the person has left the toilet seat from the state where the person is sitting on the toilet seat. With this configuration, the user's operation can be simplified.

  Moreover, the negative pressure suction type toilet may include an operation unit for operating the control device. In this case, the operation part may be arrange | positioned at the toilet bowl side in which the toilet bowl main body was provided.

  Moreover, the operation part may be provided with the switch for issuing the command which performs step A to a control apparatus. Moreover, the operation part may be provided with the switch for issuing the command which performs step B to the said control apparatus. In addition, the controller may include a water injection tank, and the control device may include Step D for injecting water from the water injection tank to the toilet body before Step B is executed. Moreover, the negative pressure suction type toilet may include a switch for issuing a command to execute Step D to the control device. Further, the control device may include a step E of pouring water from the water filling tank into the toilet body after the opening / closing valve is closed after step B. The control of the control device may be performed by sequence control managed by a timer.

  Further, the negative pressure suction type toilet may include a barometer that detects the internal pressure of the negative pressure tank. In this case, in step A, the control device may set the internal pressure of the negative pressure tank to a predetermined value based on the internal pressure of the negative pressure tank detected by the barometer.

FIG. 1 is a right side view showing a configuration of a negative pressure suction type toilet according to the present embodiment. FIG. 2 is a perspective view of the negative pressure suction toilet viewed from the bottom. FIG. 3 is a plan view of the toilet main body with the inner sleeve removed. FIG. 4 is an enlarged cross-sectional view of the bottom of the toilet main body to which the inner sleeve is attached. FIG. 5 is a side view of the inner sleeve. FIG. 6 is a perspective view showing a drain pipe connected to the toilet body. FIG. 7 is a flowchart showing a control flow of the control device. FIG. 8 is a diagram showing the state of the stool that has dropped onto the toilet body. FIG. 9 shows the structure of the bottom of the toilet body in the sample. FIG. 10 is a view showing a modification of the toilet body 12. FIG. 11 is a view showing a modification of the toilet body 12. FIG. 12 is a bottom view of the negative pressure suction toilet shown in FIG. FIG. 13: is a front view which shows the other form of a negative pressure suction type toilet. FIG. 14 is a flowchart showing another control flow of the control device. FIG. 15 is a flowchart showing another control flow of the control device.

  Hereinafter, a negative pressure suction toilet according to an embodiment of the present invention will be described with reference to the drawings. In the following description, front, rear, left, and right mean directions viewed from the user sitting on the toilet seat, and the drawings are appropriately denoted by symbols Fr, Bk, L, and R, respectively. Yes. Moreover, in each figure, the same code | symbol is attached | subjected to the member and site | part which show | plays the same effect | action, and the description which overlaps suitably is abbreviate | omitted.

  FIG. 1 is a right side view showing a configuration of a negative pressure suction toilet 10 according to the present embodiment. FIG. 2 is a perspective view of the negative pressure suction toilet 10 as seen from the bottom. As shown in FIG. 1 and FIG. 2, the negative pressure suction toilet 10 according to the present embodiment includes an outer frame 11, a toilet body 12, a drain pipe 13, a negative pressure tank 14, an on-off valve 15, And a control device 100. Here, first, the outer frame 11 will be described, and the toilet body 12, the drain pipe 13, the negative pressure tank 14, the on-off valve 15, and the control device 100 will be described in order.

<< Outer frame 11 >>
The outer frame 11 includes a base 21, a toilet seat 22, a backrest 23, and armrests 24 and 25. The base 21 is formed of a substantially rectangular box-like frame as a whole, and has a space in which the toilet body 12 can be accommodated. The base 21 is provided with four leg portions 26 to 29. A required space is formed at the bottom of the base 21 by the legs 26 to 29.

  The toilet seat 22 is attached to the upper part of the negative pressure suction toilet 10. The backrest 23 is a portion that can support the back of the user sitting on the toilet seat 22, and extends upward from the rear side surface of the base 21. The armrests 24 and 25 are parts to which the user who sits on the toilet seat 22 attaches an elbow. The backrest 23 and the armrests 24 and 25 can be appropriately removed from the base 21 in accordance with the operation ability of the user and the needs of the caregiver. The armrests 24 and 25 and the legs 26 to 29 each have a mechanism for adjusting the height, and the height can be adjusted according to the physique of the user and the needs of the caregiver.

  The upper part of the base 21 is opened in a shape that matches the upper opening 31 of the toilet body 12. The toilet body 12 accommodated in the base 21 is attached to the upper portion of the base 21 with the upper opening 31 facing upward so that the upper opening 31 is exposed. Further, the toilet seat 22 attached to the upper part of the base 21 is arranged along the upper edge of the upper opening 31 of the toilet body 12. Although the detailed illustration of the toilet seat 22 is omitted, the central portion of the toilet seat 22 is opened so that the user can excrete the toilet body 12. Although illustration is omitted, a lid may be attached to the upper portion of the base 21 so as to cover the upper opening 31 of the toilet body 12. Such a lid may have a required strength so that a person can sit down, and may have a cushion on the top. In this case, when the negative pressure suction toilet 10 is not used as a toilet, it is preferable to cover the upper portion of the base 21. As a result, the odor can be prevented from diffusing and can be used as a seat as appropriate.

<Toilet bowl body 12>
Next, the structure of the toilet body 12 will be described.

  As shown in FIG. 1, the toilet body 12 is a bottomed container. In this embodiment, the toilet body 12 is a plastic molded product, and is a bottomed container having an upper portion 12a that is wide open and having a diameter reduced toward the bottom portion 12b. In addition, an inner sleeve 30 is mounted inside the bottom 12 b of the toilet body 12. FIG. 3 is a plan view of the toilet body 12 with the inner sleeve 30 removed. FIG. 4 is an enlarged cross-sectional view of the bottom 12b of the toilet body 12 to which the inner sleeve 30 is attached.

<< Upper part 12a of toilet body 12 >>
In this embodiment, as shown in FIG. 3, the front side of the upper portion 12a of the toilet body 12 is wide in the direction viewed from the user sitting on the toilet seat. The upper opening 31 of the toilet body 12 is folded outward. The toilet main body 12 is housed in the opening of the base 21 of the outer frame 11 so that the upper opening 31 and the inside of the toilet can be seen from the top of the base 21.

<< Bottom 12b of Toilet Body 12 >>
The bottom 12b of the toilet body 12 is provided slightly behind the toilet body 12 in accordance with the position where the user's buttocks seated on the toilet seat is accommodated. As shown in FIG. 4, the bottom portion 12 b is provided with a drain port 32 (also referred to as “discharge port” as appropriate) as a discharge port of the toilet body 12. Around the drain port 32, a toilet receiving part 41, a step part 42, and an inclined surface part 43 are provided. In this embodiment, as shown in FIGS. 1 and 3, the bottom 12 b of the toilet body 12 is formed in an inverted conical shape. A bottomed concave portion 12c to which the inner sleeve 30 is attached is formed in the deep portion of the inverted conical bottom portion 12b. The concave portion 12 c includes an upper cylindrical portion 51, a throttle portion 52, and a lower cylindrical portion 53.

  Here, of the bottom portion 12 b of the toilet body 12, the side surface formed in an inverted conical shape forms the inclined surface portion 43 of the toilet body 12. The upper cylindrical portion 51 extends downward from the lower edge of the side surface formed in an inverted conical shape. The upper cylindrical portion 51 forms a stepped portion 42 of the toilet body 12. The narrowed portion 52 projects from the lower edge of the upper cylindrical portion 51 in the horizontal direction. The lower cylindrical portion 53 is continuous downward from the inner edge of the throttle portion 52. The lower cylindrical portion 53 is formed of a cylindrical bottomed depression that is slightly smaller than the upper cylindrical portion 51, and an insertion through which the lower portion of the inner sleeve 30 is inserted at the center of the bottom 54 of the lower cylindrical portion 53. A hole 55 is formed. A screw hole 56 for screwing the inner sleeve 30 is formed around an insertion hole 55 formed in the bottom 54 of the lower cylindrical portion 53.

<Inner sleeve 30>
FIG. 5 is a side view of the inner sleeve 30. As shown in FIG. 5, the inner sleeve 30 is a cylindrical member that is attached to the bottom 12 b of the toilet body 12. The inner sleeve 30 includes an upper shaft portion 36 and a lower shaft portion 37. The upper shaft part 36 is a part to be attached to the bottom part 12 b of the toilet body 12.

  As shown in FIG. 4, the upper shaft portion 36 is attached to the lower portion of the upper cylindrical portion 51 and the lower cylindrical portion 53 formed on the bottom portion 12 b of the toilet body 12. The upper shaft portion 36 has an outer shape that fits into the bottom portion 12b of the toilet body 12 with almost no gap. That is, the upper cylindrical portion 36 a that fits into the upper cylindrical portion 51 of the toilet main body 12 is provided on the upper stage of the upper shaft portion 36 of the inner sleeve 30. A step 36 b is provided in the middle of the upper shaft portion 36 of the inner sleeve 30 to match the throttle portion 52 at the lower portion of the upper cylindrical portion 51 of the toilet body 12. A lower cylindrical portion 36 c that fits into the lower cylindrical portion 53 of the toilet body 12 is provided at the lower stage of the upper shaft portion 36 of the inner sleeve 30.

  The lower shaft portion 37 includes a shaft 37a that is thinner than the lower cylindrical portion 36c of the lower stage of the upper shaft portion 36. The shaft 37 a is inserted into an insertion hole 55 formed in the bottom 54 of the lower cylindrical portion 53 of the bottom 12 b of the toilet body 12. In this embodiment, the upper and lower cylindrical portions 36 a and 36 c of the upper shaft portion 36 and the shaft 37 a of the lower shaft portion 37 are formed along the same axis.

  In the upper part of the inner sleeve 30, an inverted conical recess that forms the toilet receiving portion 41 is formed. A drain port 32 is formed in the center of the depression (the toilet receiving portion 41). Then, along the central axis L <b> 1 (see FIG. 1) of the inner sleeve 30, the conduit 33 connected to the drain port 32 passes through the upper shaft portion 36 and the lower shaft portion 37.

<< Inner sleeve 30 mounting structure >>
In this embodiment, as shown in FIG. 4, an inner sleeve 30 is attached to the bottom 12 b of the toilet body 12. By attaching the inner sleeve 30 to the toilet body 12, the toilet receiving portion 41 and the drain port 32 are provided on the bottom 12 b of the toilet body 12. Hereinafter, the structure of the bottom 12b of the toilet main body 12 and the mounting structure of the inner sleeve 30 will be further described.

  As shown in FIG. 4, the inner sleeve 30 is formed such that the lower shaft portion 37 is inserted into the insertion hole 55 formed in the bottom portion 12 b of the toilet body 12 and the upper shaft portion 36 is formed in the bottom portion 12 b of the toilet body 12. The lower cylindrical portion 53 and the upper cylindrical portion 51 are mounted. At this time, a flat ring-shaped sealing material 57 is mounted on the bottom 54 of the lower cylindrical portion 53. In addition, an O-ring 58 is attached to the throttle portion 52 provided in the upper cylindrical portion 51 and the lower cylindrical portion 53.

  Thus, in this embodiment, the inner sleeve 30 is attached to the bottom 12b of the toilet body 12. And the toilet receiving part 41 is provided in the upper surface of the inner sleeve 30, and the drain port 32 is formed. Furthermore, a stepped portion 42 and an inclined surface portion 43 are formed from the upper edge of the toilet receiving portion 41 by the side surface of the toilet body 12. In this embodiment, the lower shaft portion 37 of the inner sleeve 30 extends downward from the bottom 12 b of the toilet body 12. A pipe 33 communicating with the drain port 32 is formed on the lower shaft portion 37 of the inner sleeve 30. Hereinafter, the drain port 32, the pipe line 33, the toilet receiving part 41, the level | step-difference part 42, and the inclined surface part 43 of the toilet bowl main body 12 are further demonstrated.

<< Drain port 32 >>
The drainage port 32 is an opening for discharging the wastewater accumulated in the toilet body 12. In this embodiment, the drain port 32 is formed in the inner sleeve 30. The drainage port 32 communicates with a conduit 33 formed in the inner sleeve 30. The pipe line 33 is formed straight along the axis L <b> 1 that is substantially perpendicular to the drain port 32 along the lower shaft portion 37 of the inner sleeve 30 that extends to the outside of the toilet body 12. In this embodiment, the inner diameter (diameter) of the drain port 32 and the pipe line 33 formed in the inner sleeve 30 is about 20 mm.

<< Flight receiving part 41 >>
The toilet receiver 41 formed on the bottom 12b of the toilet body 12 extends from the drain port 32 in the horizontal direction. Here, with respect to the flight receiving part 41, “spreading in the horizontal direction” means not only a form in which the flight receiving part 41 extends in the horizontal direction from the drain port 32, but also an inclination that spreads upward as it extends in the horizontal direction. The form is included.

  In this embodiment, the toilet receiving part 41 is formed by the upper surface of the inner sleeve 30 attached to the bottom part 12b of the toilet body 12. Moreover, the flight receiving part 41 is inclined upward and spreads from the drain port 32 in the horizontal direction. More specifically, the stool receiving portion 41 is configured by an inclined surface along the side surface of the inverted cone with the vertical axis L1 passing through the center of the drain port 32 as a conical axis and the apex facing downward. The inclination angle θ1 (see FIG. 8) of the stool receiving portion 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is preferably about 40 degrees or more and 80 degrees or less. In this embodiment, the inclination angle θ1 (see FIG. 8) of the flight receiving portion 41 is set to 60 degrees. Moreover, the lower edge of the toilet receiving part 41 becomes the drain port 32, The internal diameter D1 (diameter) is 20 mm. Moreover, the upper edge of the flight receiving part 41 becomes the level | step-difference part 42, and the internal diameter D2 (diameter) is 65 mm.

<< Step part 42 >>
The step portion 42 rises from the peripheral edge of the toilet receiving portion 41. In this embodiment, the inner peripheral surface of the bottom 12 b of the toilet body 12 extends upward from the upper outer peripheral edge of the inner sleeve 30 attached to the bottom 12 b of the toilet body 12. The step portion 42 is constructed by the inner peripheral surface of the bottom portion 12 b of the toilet body 12 that extends upward from the upper outer peripheral edge of the inner sleeve 30. The height of the step portion 42 (the distance between the flight receiving portion 41 and the inclined surface portion 43) may be about 10 mm to 30 mm, and preferably about 15 mm to 25 mm. In this embodiment, the height of the step portion 42 is about 10 mm.

<< Inclined surface part 43 >>
The inclined surface portion 43 is continuous from the upper edge of the stepped portion 42 and has a steeper inclination than the toilet receiving portion 41. In this embodiment, the inclined surface portion 43 is constructed by the inner peripheral surface of the bottom portion 12 b of the toilet body 12. The inclined surface portion 43 is inclined upward and spreads in the horizontal direction from the upper edge of the stepped portion 42. More specifically, the inclined surface portion 43 is configured by an inclined surface along a side surface of an inverted cone having a vertical axis L1 passing through the center of the drain port 32 as a conical axis and a vertex facing downward. The inclined surface portion 43 may have a steeper inclination than the flight receiving portion 41. The inclination angle θ2 (see FIG. 8) of the toilet receiving part 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is preferably set to be 20 degrees or more and 45 degrees or less after making it steeper than the toilet receiving part 41. In this embodiment, the inclination angle θ1 (see FIG. 8) of the flight receiving portion 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is 60 degrees, whereas the inclination angle θ2 of the inclined surface portion 43 (see FIG. 8). ) Is about 30 degrees.

  As will be described later, a large force is applied to the bottom portion 12 b of the toilet body 12, in particular, the drain port 32 and its vicinity by the suction force of the negative pressure tank 14. For this reason, the bottom part 12b of the toilet main body 12, especially the drain port 32 and its vicinity part, wants to give required intensity | strength (rigidity). In this embodiment, by attaching the inner sleeve 30 to the bottom 12b of the toilet body 12, the required strength is given to the bottom 12b of the toilet body 12. Further, the inner sleeve 30 is attached to secure the strength of the bottom 12b of the toilet main body 12, but the thickness of the other portions of the toilet main body 12 can be reduced. For this reason, the manufacturing cost can be reduced as a whole.

  In this embodiment, the inner sleeve 30 is attached to the bottom 12b of the toilet main body 12, but the toilet main body 12 is not limited to the form in which the inner sleeve 30 is attached. For example, without using the inner sleeve 30, the drain port 32 is provided in the bottom 12 b of the toilet body 12, and the toilet receiving portion 41, the stepped portion 42, and the inclined surface portion 43 are sequentially provided around the drain port 32. In addition, the bottom 12b of the toilet body 12 may be formed.

<< Cover 60 >>
In this embodiment, as shown in FIGS. 1, 2, and 4, the lower part of the toilet body 12 is covered with a cover 60. The cover 60 is attached to the base 21. Further, as shown in FIG. 4, through holes 62 are formed in the cover 60 at corresponding positions so that the lower shaft portion 37 of the inner sleeve 30 extending downward from the bottom portion 12 b of the toilet body 12 is inserted. ing. The through-hole 62 is inserted into the lower shaft portion 37 of the inner sleeve 30 and the drain pipe 13 attached to the lower shaft portion 37.

<< Piping space 65 >>
In this embodiment, as shown in FIGS. 1 and 2, piping is provided below the base 21 below the cover 60 and behind the cover 60 (below the portion where the backrest 23 is provided). A space 65 is provided. The drain pipe 13 is disposed in the piping space 65.

<< drain line 13 >>
As shown in FIG. 1, the drain pipe 13 is a pipe that connects the drain port 32 of the toilet body 12 and the suction port 93 of the negative pressure tank 14. In this embodiment, the drain pipe 13 is connected to the lower shaft portion 37 of the inner sleeve 30 extending from the bottom 12 b of the toilet body 12, and is connected to the drain port 32 through the pipe 33 of the inner sleeve 30. Yes. Accordingly, the drainage port 32 of the toilet body 12, the pipe line 33 of the lower shaft portion 37 of the inner sleeve 30, and the drainage pipe line 13 are communicated.

  FIG. 6 is a perspective view showing the drain pipe 13 connected to the toilet body 12. In this embodiment, as shown in FIGS. 1 and 6, the drainage pipe 13 includes an introduction pipe 71, a horizontal pulling pipe 72, a rising pipe 73, a horizontal pipe 74, a downfall pipe 75, and an end pipe 76. And a connecting pipe 77. Of the drainage pipe 13, the introduction pipe 71, the horizontal pulling pipe 72, the rising pipe 73, the horizontal pipe 74, the descending pipe 75, and the end pipe 76 are made of polyvinyl chloride.

<< Introduction pipe 71 >>
As shown in FIG. 4, the introduction pipe 71 is a pipe connected to the lower shaft portion 37 of the inner sleeve 30. The introduction pipe 71 has a receiving port 71 a into which the lower shaft portion 37 of the inner sleeve 30 is inserted. In this embodiment, since the introduction tube 71 and the inner sleeve 30 are made of the same vinyl chloride, the receiving port 71a of the introduction tube 71 and the lower shaft portion 37 of the inner sleeve 30 can be firmly bonded with an adhesive. it can.

  In this embodiment, the introduction pipe 71 has a receiving port 71 a into which the lower shaft portion 37 of the inner sleeve 30 is inserted, and is connected to a pipe line 33 of the inner sleeve 30 that extends from the drain port 32 approximately vertically. . The introduction pipe 71 is bent substantially horizontally from the receiving port 71a, and a receiving port 71b into which one end of the horizontal pulling tube 72 is inserted is provided at the tip. In this embodiment, the inner diameter (diameter) of the conduit 33 of the inner sleeve 30 is approximately 20 mm. On the side of the receiving port 71a to which the pipe line 33 of the inner sleeve 30 is connected, the inner diameter of the pipe line from the introduction pipe 71 to the connection pipe 77 is about 20 mm.

  Here, the bent portion 71c of the introduction pipe 71 is bent at a substantially right angle, and the height (elbow height) of the bent portion 71c is 10 mm. Accordingly, the height of the introduction pipe 71 and the horizontal pulling pipe 72 from the lower portion of the toilet body 12 (here, the lower shaft portion 37 of the inner sleeve 30) is kept low.

<Horizontal tube 72>
The horizontal pulling tube 72 is disposed in a space below the cover 60. The horizontal pulling pipe 72 is left from the lower end of the introduction pipe 71 to the left side of the piping space 65 (see FIG. 1) behind the cover 60 of the negative pressure suction toilet 10 provided behind the cover 60. It extends diagonally backward. The horizontal pipe 72 is connected to the rising pipe 73 by a bent joint 81.

《Rise tube 73》
The rising pipe 73 is arranged substantially vertically at a position on the left side of the piping space 65 of the negative pressure suction toilet 10. The rising pipe 73 is connected to the horizontal pipe 74 at a position on the left side of the upper portion of the piping space 65. The rising pipe 73 and the horizontal pipe 74 are connected by a bent joint 82.

<Horizontal tube 74>
FIG. 12 is a bottom view of the negative pressure suction toilet 10. As shown in FIG. 12, the horizontal pipe 74 is arranged horizontally on the left and right in the upper part of the piping space 65 of the negative pressure suction toilet 10. The horizontal pipe 74 is connected to the downcomer pipe 75 at a central position in the upper part of the piping space 65. The horizontal pipe 74 and the downcomer pipe 75 are connected by a bent joint 83.

<< Descent pipe 75 >>
As shown in FIG. 2, the downcomer 75 is arranged substantially vertically at the center position of the piping space 65 of the negative pressure suction toilet 10. The downcomer 75 is connected to the end pipe 76 at a central position below the piping space 65. The downcomer pipe 75 and the end pipe 76 are connected by a bent joint 84.

<End pipe 76>
The end pipe 76 passes through the legs 28 and 29 on the rear side of the negative pressure suction toilet 10 and is disposed with the end 76 a facing the rear of the negative pressure suction toilet 10. A bracket is attached to the drainage pipe 13 at appropriate positions from the introduction pipe 71 to the end pipe 76, and is fixed to the lower part of the negative pressure suction toilet 10.

<< Connection pipe 77 >>
As shown in FIG. 1, a connecting pipe 77 connected to the negative pressure tank 14 is connected to the end 76 a of the end pipe 76. The connection pipe 77 is a pipe that connects the drainage pipe line 13 and the negative pressure tank 14 that are constructed in the pipe space 65 under the negative pressure suction toilet 10.

  In this embodiment, each pipe from the introduction pipe 71 to the end pipe 76 is constructed by combining, for example, hard pipes made of vinyl chloride and bonding them using an adhesive, for example. The connecting pipe 77 is constructed by a flexible soft pipe. Each piping is not limited to this, For example, you may construct | assemble using hard piping suitably, and may construct | assemble using flexible soft piping.

<< Drainage surface regulation part 70 >>
The drainage pipe line 13 that connects the negative pressure suction toilet 10 and the negative pressure tank 14 includes a drainage surface defining portion 70. The drainage surface defining part 70 is a part that regulates the height of the drainage accumulated in the toilet body 12 so that the drainage accumulates at least above the upper edge of the stepped part 42. In this embodiment, the height of the water accumulated in the toilet main body 12 is determined to be a predetermined height by the height of the bottom of the horizontal tube 74 connected to the rising tube 73.

  That is, in this embodiment, when water is poured into the negative pressure suction toilet 10 in a state where the drain pipe 13 is open to the atmosphere, the poured water flows into the drain pipe 13 from the drain port 32 and is introduced into the introduction pipe. 71, the horizontal pulling pipe 72 and the rising pipe 73 are filled to reach the horizontal pipe 74. Further, when the water injection into the toilet main body 12 is continued, the injected water flows through the bottom of the horizontal pipe 74 and flows into the downcomer pipe 75. For this reason, in the state where the drain pipe 13 is open to the atmosphere, even when there is sufficient water injection in the toilet body 12, the height of the water accumulated in the toilet body 12 is that of the horizontal pipe 74 connected to the rising pipe 73. The height is determined in advance by the height of the bottom. As described above, the drainage surface defining portion 70 includes the rising pipe 73 and the horizontal pipe 74 connected to the rising pipe 73.

  In this embodiment, the height J1 of the bottom portion of the horizontal tube 74 connected to the rising tube 73 is higher than the upper edge of the stepped portion 42 of the toilet body 12, as shown in FIG. It is set near the upper stage of the inclined surface portion 43 of the toilet body 12. Note that the pipe line from the introduction pipe 71 to the connection pipe 77 may be narrowed in the middle. Thereby, a pipe line can be made thin. For example, the pipe line from the introduction pipe 71 to the connection pipe 77 has a plurality of bent portions. The pipe line may be squeezed at the bent portion. In this case, for example, the pipe line may be narrowed at the bent portion 71c of the introduction pipe 71 extending from the introduction pipe 71 to the horizontal drawing pipe 72, and the inner diameter (diameter) of the pipe line to which the horizontal drawing pipe 72 is connected is about 16 mm. The downstream side from the bent portion 71c of the introduction pipe 71 may be about 16 mm.

《Negative pressure tank 14》
Next, the negative pressure tank 14 will be described. As shown in FIG. 1, the negative pressure tank 14 includes a tank body 91, a vacuum pump 92, a suction port 93, a discharge port 94, a discharge valve 95, an air release valve 96, and a barometer 97. ing.

<Tank body 91>
The tank body 91 is a pressure vessel that can withstand a required vacuum pressure. In the negative pressure suction type toilet 10, the tank body 91 is depressurized and the waste water containing the stool is sucked from the toilet body 12 by the suction force when the air is released to the atmosphere. For this purpose, the tank body 91 may have a sufficient capacity (for example, approximately 7L to 15L).

<< Vacuum pump 92, pressure reducing valve 92c >>
The vacuum pump 92 is a device that sucks air in the tank body 91 and depressurizes the tank body 91. In this embodiment, the vacuum pump 92 has a required capacity. For example, it is preferable that the vacuum pump 92 has a capacity capable of reducing the pressure of the tank body 91 until the internal pressure of the tank body 91 reaches about 0.08 MPa. Note that the internal pressure of the tank body 91 after being depressurized by the vacuum pump 92 is not particularly limited to 0.08 MPa. The internal pressure of the tank body 91 after the pressure is reduced by the vacuum pump 92 is a negative pressure suitable for the waste water containing excrement accumulated in the toilet body 12 to be sucked by the negative pressure tank 14 as will be described later. It may be secured in the tank 14. The pipe 92a connecting the tank body 91 and the vacuum pump 92 includes an air filter 92b and a pressure reducing valve 92c. The air filter 92b is a filter that removes foreign substances in the air drawn into the vacuum pump 92 from the tank body 91. The pressure reducing valve 92c is a valve that controls the timing of evacuation by the vacuum pump 92.

<< Suction port 93, discharge port 94, discharge valve 95, air release valve 96 >>
The suction port 93 is an opening provided in the tank body 91 and serves as a connection port to which the drain pipe 13 is connected to the tank body 91. The discharge port 94 is an opening provided at the bottom of the tank main body 91 and is connected to the sewage basin 200. The discharge valve 95 is provided at the discharge port 94. The air release valve 96 is provided in the tank body 91 and is a valve that opens the tank body 91 to the atmosphere. The tank body 91 is provided with a barometer 97 that measures the internal pressure of the tank body 91.

<Open / close valve 15>
The on-off valve 15 is provided in the suction port 93 of the negative pressure tank 14. In this embodiment, since the on-off valve 15 is provided at the suction port 93 of the negative pressure tank 14, the pressure resistance required for the drain pipe 13 can be relaxed. Thereby, versatile piping can be used by the drain line 13, and the cost of the negative pressure suction toilet 10 can be suppressed at low cost. Although illustration is omitted, the on-off valve 15 may be provided in the drain line 13. In the case where the on-off valve 15 is provided in the drain line 13, the drain line 13 may be a pipe having a required pressure resistance at least in a portion to be evacuated. In addition, by providing the on-off valve 15 on the side close to the toilet body 12 of the drain pipe 13, it is possible to evacuate the drain pipe 13. For this reason, even if the drain line 13 is long in the negative pressure suction toilet 10, a necessary suction force can be obtained.

  Here, the pressure reducing valve 92 c, the discharge valve 95, the air release valve 96, and the opening / closing valve 15 are electromagnetic valves, and are electrically controlled by the control device 100. Further, the barometer 97 appropriately transmits data on the internal pressure of the tank main body 91 to the control device.

<Control device 100>
The control device 100 controls the pressure reducing valve 92 c, the discharge valve 95, the air release valve 96, and the opening / closing valve 15. FIG. 7 is a flowchart showing a control flow of the control device 100.

  The control flow of the control device 100 is based on the following steps S1 to S8, for example. Further, for example, in the example shown in FIG. 1, the operation switch 110 is provided at an appropriate position (for example, the armrest 25) on the negative pressure suction type toilet 10 side. And it is good to start the control flow of FIG. 7 based on the user of the negative pressure suction type toilet 10 operating the operation switch 110. Here, the control by the control device 100 is a sequence control that sequentially executes each process at a predetermined timing based on a timer built in the control device 100.

<< Depressurization Steps S1 and S2 of Tank Body 91 >>
In the pressure reducing process of the tank body 91, the pressure reducing valve 92c is opened and the vacuum pump 92 is operated (ON) with the on-off valve 15, the discharge valve 95, and the air release valve 96 closed (S1). As a result, the tank body 91 of the negative pressure tank 14 is evacuated. The decompression step S1 is stopped after a predetermined time KT1 has elapsed. In the decompression step S1, after a predetermined time KT1 has elapsed, the decompression valve 92c is closed and the vacuum pump 92 is stopped (OFF) (S2). Thereby, the tank main body 91 is depressurized to an internal pressure lower than a predetermined value.

  Here, the predetermined time KT1 may be determined based on the time required for the tank main body 91 to reach the required internal pressure (negative pressure state) after the vacuum pump 92 is actuated. Therefore, the time KT <b> 1 set here varies depending on the suction capability of the vacuum pump 92 and the capacity of the tank body 91. Further, an appropriate time may be set so that the tank main body 91 is surely set to an internal pressure lower than a predetermined value. For example, if the negative pressure tank 14 is brought into a negative pressure state of about 0.08 MPa, for example, the vacuum pump 92 is driven for about 15 seconds, depending on the capacity of the negative pressure tank 14 and the output of the vacuum pump 92. Is feasible.

  The step (S2) of stopping the pressure reduction has exemplified the configuration controlled based on the timer, but the pressure reducing valve is based on the internal pressure data of the tank main body 91 obtained by the barometer 97 attached to the tank main body 91. The timing for stopping 92c and the vacuum pump 92 may be adjusted. That is, the control device 100 obtains the data of the internal pressure of the tank main body 91, closes the pressure reducing valve 92c at the timing when {the internal pressure of the tank main body 91 <B1 (predetermined internal pressure)}, and turns off the vacuum pump 92. It may be stopped (OFF). As a result, the tank body 91 can be more reliably brought to an internal pressure lower than a predetermined value.

  Even in the case of controlling by the timer, the internal pressure of the tank body 91 is measured based on the barometer 97 after the step (S2) of stopping the decompression, and the tank body 91 is determined based on the data. If the pressure has not reached, the pressure may be further reduced for a predetermined time (additional pressure reduction). In this case, the internal pressure of the tank body 91 may be measured by the barometer 97, and the additional pressure reduction may be repeated until the tank body 91 reaches a predetermined internal pressure. Thereby, the tank main body 91 can be pressure-reduced more reliably to the internal pressure lower than predetermined.

<< Suction Steps S3 and S4 >>
The suction step (S3) for sucking the waste water from the toilet body 12 to the tank body 91 is performed in a state where the tank body 91 is reduced to a required internal pressure by S1 and S2. Here, the on-off valve 15 is opened, and the waste water accumulated in the toilet body 12 is sucked into the tank body 91. As a result, the tank main body 91 communicates with the toilet main body 12 through the drain pipe 13. Since the toilet body 12 is open to the atmosphere, a suction force is generated by the tank body 91 that attempts to return to the atmospheric pressure from the decompressed state. Due to the suction force, the waste water accumulated in the toilet body 12 is drawn into the tank body 91 through the drain pipe 13. Here, after a predetermined time KT2 has elapsed since the opening / closing valve 15 was opened, the opening / closing valve 15 is closed (S4).

<< Opening to the atmosphere S5, drainage S6 >>
Next, in a state where the drainage is drawn into the tank body 91, the atmosphere release valve 96 is opened, and the tank body 91 is opened to the atmosphere (S5). Then, the discharge valve 95 is opened by delaying the timing to release the atmosphere (S6). Thereby, the waste water collected in the tank body 91 can be allowed to flow down naturally to the sewage water 200. Here, after a predetermined time KT3 has elapsed since the opening of the atmosphere release valve 96, the atmosphere release valve 96 is closed (S7). Further, after a predetermined time KT4 has elapsed since the opening of the discharge valve 95, the discharge valve 95 is closed (S8). Thereby, the toilet bowl main body 12 and the tank main body 91 return to the state before the operation switch 110 is operated.

  Here, water is poured into the toilet body 12 by the user. For example, as shown in FIG. 1, a tank 120 for water pouring (also referred to as a water filling tank or a water supply pump) is provided in the negative pressure suction toilet 10. And a pump 122 (also referred to as a water injection pump or a water supply pump) are prepared, and when the operation switch 110 is pressed, the negative pressure tank 14 is depressurized before the depressurization step. At the same time, the pump may be operated so that a predetermined amount of water is poured from the tank to the toilet body 12 through the conduit 124.

  Thus, the negative pressure suction toilet 10 includes the vacuum pump 92 connected to the negative pressure tank 14, the actuator (electromagnetic valve mechanism) for operating the on-off valve 15, and the actuator for operating the vacuum pump 92 and on-off valve 15. And a control device 100 for controlling (electromagnetic valve mechanism). Thereby, operation of the negative pressure suction type toilet 10 can be simply constituted by the control device 100.

  In the negative pressure suction toilet 10, the negative pressure tank 14 (negative pressure tank side element 10B) may be provided at a location away from the negative pressure suction type toilet 10 main body (toilet side element 10A). For example, the negative pressure suction toilet 10 main body (the toilet side element 10A) may be installed indoors, and the negative pressure tank 14 (the negative pressure tank side element 10B) may be installed outdoors. In this case, for example, as shown in FIG. 1, a negative pressure suction toilet 10 body installed indoors and a negative pressure tank 14 installed outdoors through a drainage pipe 13 with a hole in a building wall 250. It is good to connect. In this way, when the negative pressure tank 14 is installed outdoors, the sewage basin 200 to which the negative pressure tank 14 is connected can be installed outdoors. For this reason, the piping work of sewage can be reduced by installing the negative pressure tank 14 near the existing sewage piping installed outdoors. Thereby, the installation cost in the case of installing the negative pressure suction type toilet 10 in the existing house can be suppressed at low cost. Moreover, the hole opened for the wall 250 of a building can utilize the hole opened for an air conditioner, for example.

  In this case, the operation switch 110 as an operation unit of the control device 100 may be provided on the toilet side installed indoors. Thereby, the negative pressure tank 14 can be operated indoors and the waste water can be sucked in at an appropriate timing. The operation switch 110 may be a remote controller that remotely operates the control device 100. Thereby, the operation switch 110 can be arrange | positioned in the position where a user is easy to use.

<< Action of negative pressure suction toilet 10 >>
As described above, the toilet main body 12 of the negative pressure suction toilet 10 includes the toilet main body 12, the negative pressure tank 14, the drain line 13, the on-off valve, as shown in FIGS. 15. Here, the toilet bowl main body 12 is a bottomed container in which the drain port 32 is provided in the bottom part 12b. The negative pressure tank 14 includes a suction port 93. The drain line 13 is a pipe line that connects the drain port 32 of the toilet body 12 and the suction port 93 of the negative pressure tank 14. The on-off valve 15 is provided in the drain line 13 or the suction port 93. In the bottom 12b of the toilet main body 12, a stool receiving part 41 extending in the horizontal direction from the drain port 32, a stepped part 42 rising from the peripheral part of the toilet receiving part 41, and an upper edge of the stepped part 42 are connected to the toilet 12 An inclined surface portion 43 having a steeper slope than the receiving portion 41 is provided. The drainage pipe line 13 has a drainage surface defining part 70 that regulates the height of the drainage collected in the toilet body 12 so that the drainage is accumulated above the upper edge of the stepped part 42.

  In this embodiment, as described above, the drain port 32 is formed at the center of the toilet receiving portion 41. Around the drain port 32, an inverted conical inclined surface portion 43 having an inclination angle of about 30 degrees with respect to the vertical axis L1 passing through the center of the drain port 32 is provided. A stool receiving portion 41 is provided from the lower edge of the inclined surface portion 43 through the step portion 42. The flight receiving portion 41 is inclined more gently than the inclined surface portion 43 from the lower edge of the step portion 42 toward the center. Here, the inner diameter (D1) of the drain port 32 is approximately 20 mm. The inner diameter (D2) of the lower edge of the inclined surface portion 43 and the stepped portion 42 is approximately 65 mm. The height (H1) of the step portion 42 is approximately 10 mm. The inclination angle (θ2) of the inclined surface portion 43 is about 30 degrees. The inclination angle (θ1) of the toilet receiver 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is approximately 60 degrees.

  In such a negative pressure suction toilet 10, the user of the negative pressure suction toilet 10 sits on the toilet seat 22 and defecates. FIG. 8 shows a state of the stool 300 dropped on the toilet body 12. Here, the stool 300 dropped on the toilet body 12 is a simulated stool prepared by kneading miso with a predetermined viscosity to imitate human stool. Here, a simulated stool formed into a cylindrical shape having a diameter (Bd) of 25 mm and a length (BL) of 80 mm is used. In the negative pressure suction type toilet 10, the stool that is thicker than the drain port is arranged with one end facing the drain port in the negative pressure suction toilet 10, and the stool is most difficult to be sucked into the drain port. It follows the rule of thumb that it is one of the typical examples.

  FIG. 8 shows a state where one simulated stool 300 is placed on the toilet body 12, but statistically, the average amount of defecation per time of a general Japanese adult male is It corresponds to two of the flights 300. Statistically, the average amount of urine per time of a general Japanese adult male is about 500 mL. In addition, in consideration of water injection by the user, approximately 500 mL to 1 L of waste water accumulates in the toilet body 12 in addition to the stool 300 described above. In such a state, moreover, since the user usually uses toilet paper to wipe the anus after defecation, several more toilet papers of the required length are added.

  In the negative pressure suction type toilet 10, the stool 300 dropped on the toilet body 12 due to the shape of the bottom 12b of the toilet body 12 typically has one end directed to the drain port 32 as shown in FIG. It is inclined along the inclined surface portion 43 and is disposed in a state of standing on the bottom 12b of the toilet body 12. The toilet main body 12 has a stepped portion 42 between the inclined surface portion 43 and the toilet receiving portion 41. A gap is formed between the toilet 300 and the toilet body 12, with one end thereof directed toward the drain port 32, inclined along the inclined surface portion 43 and standing on the bottom 12 b of the toilet body 12, by the stepped portion 42. S1 is formed.

  Further, the drainage flows into the drainage pipe 13 from the drainage port 32. At this time, as shown in FIG. 1, the height of the drainage accumulated in the toilet body 12 is defined by a drainage surface defining part 70 provided in the drainage pipe 13. Here, the height of the drainage accumulated in the toilet body 12 is defined by the height of the bottom of the horizontal pipe 74 connected to the rising pipe 73. In this embodiment, the height J1 to the bottom of the horizontal tube 74 connected to the rising tube 73 is higher than the upper edge of the stepped portion 42 of the toilet body 12, as shown in FIG. It is set near the upper stage of the inclined surface portion 43 of the toilet body 12. For this reason, when sufficient water is poured, the toilet body 12 can collect drainage up to the vicinity of the upper stage of the inclined surface portion 43 of the toilet body 12. In addition, when water is poured into the toilet body 12 in a state where the drain pipe 13 is not open to the atmosphere, the air in the drain pipe 13 is confined by the drainage, and the internal pressure of the drain pipe 13 increases. Accordingly, the waste water is stored in the toilet body 12 up to a higher position.

  Moreover, in this embodiment, the internal diameter of the drainage pipe line 13 is as narrow as about 20 mm, and the inclination of the inclined surface part 43 of the toilet body 12 is steep. For this reason, there is little waste water collected in the drain pipe 13, and the volume of the toilet body 12 is smaller toward the bottom. For this reason, even if it is about 500 mL of waste_water | drain, in the toilet bowl main body 12, waste_water | drain collects to the position sufficiently higher than the toilet 300 or toilet paper. At this time, an intermediate portion in the length direction of the rod-shaped stool 300 hits the upper edge of the stepped portion 42. In this state, the external force P <b> 1 acts on an intermediate portion in the length direction of the stool 300 by the dead weight of the stool 300. For this reason, although not shown in figure, the shape of the stool 300 may collapse in the intermediate part of a length direction by the effect | action of this external force P1.

  In the negative pressure suction type toilet 10, the operation switch 110 is typically operated in such a state even when the rod-like stool 300 is excreted by the user. When the operation switch 110 is operated in such a state, the tank body 91 of the negative pressure tank 14 is depressurized to a predetermined internal pressure, and then the on-off valve 15 is opened. When the on-off valve 15 is opened, the waste water including the stool 300 collected in the toilet body 12 is drawn into the drain port 32 with a considerable momentum.

  At this time, an appropriate gap S <b> 1 is formed in the toilet body 12 between the toilet 300 and the toilet body 12. Drainage has accumulated in the gap S1. For this reason, the stool 300 is pulverized by the momentum of the waste water collected in the gap S <b> 1 being drawn into the drain port 32 when sucked into the drain port 32. In particular, in the long stool 300 having a rod shape, as shown in FIG. 8, an external force P1 is applied to an intermediate portion in the length direction. The stool 300 is easily divided at the middle part. For this reason, in this embodiment, although the inner diameter (diameter) of the drainage port 32 of the toilet body 12 is as narrow as about 20 mm, the stool 300 is appropriately collapsed and is pulled into the drainage port 32 while being crushed. Furthermore, the waste water containing the crushed stool 300 contains a large amount of air drawn into the drain port 32.

  As described above, in the negative pressure suction toilet 10, the bottom 12b of the toilet main body 12 has a toilet receiving part 41 extending in the horizontal direction from the drain port 32, and a stepped part 42 rising from the peripheral edge of the toilet receiving part 41. Further, an inclined surface portion 43 that is continuous from the upper edge of the stepped portion 42 and has a steeper inclination than the toilet receiving portion 41 is provided. For this reason, an appropriate gap S <b> 1 is formed in the toilet body 12 between the toilet 300 and the toilet body 12. Further, the drainage pipe 13 has a drainage surface defining part 70 that regulates the height of the drainage accumulated in the toilet body 12 so that the drainage accumulates at least above the upper edge of the stepped part 42. For this reason, the waste water flows into the gap S1 described above. And in this state, since the waste water including the stool 300 collected in the toilet main body 12 is sucked from the drain port 32, for example, the force when the waste water flowing into the gap S1 is drawn acts on the stool 300. For this reason, the stool 300 is smoothly sucked into the drain port 32 while being properly crushed. In this case, even if the inner diameter (diameter) of the drain port 32 is, for example, about 20 mm as disclosed herein, or even about 15 mm, the drainage is sucked almost smoothly.

  Furthermore, in this embodiment, the conduit 33 connected to the drain port 32 is formed vertically. For this reason, not only the suction force from the negative pressure tank 14 but also the action of gravity due to the dead weight of the waste water including the stool 300 allows the waste water including the stool 300 to be drawn from the drain port 32 to the conduit 33. The path of the conduit 33 connected to the drain port 32 changes at a substantially right angle at the first bent portion 71 c when the lead pipe 71 leads to the horizontal pulling pipe 72. At this time, since the stool 300 contained in the waste water collides violently with the wall surface of the pipeline, it is further crushed. Furthermore, since the turbulent flow is generated in the drainage at the bent portion 71c, the stool is more finely mixed with the drainage and the air contained in the drainage. For this reason, in this embodiment, the inner diameter (diameter) of the drain pipe 13 is as narrow as about 20 mm in the bent portion 71c of the introduction pipe 71, but the stool 300 and toilet paper are not clogged even in the portion 71c. Flowing into.

  Further, in this embodiment, the drain pipe 13 includes an introduction pipe 71, a horizontal pulling pipe 72, a rising pipe 73, a horizontal pipe 74, a descending pipe 75, an end pipe 76, a connecting pipe 77, A plurality of bent portions are provided in the path leading to the negative pressure tank 14. In such a bent portion, the traveling direction of the waste water changes suddenly, so that turbulent flow occurs, and the stool 300 is further finely pulverized and mixed with the waste water and the air contained in the waste water.

  In this manner, the stool 300 and toilet paper included in the drainage are drawn into the tank body 91 without being clogged at the drainage port 32 and the drainage pipe 13. Furthermore, in this embodiment, since not only the inclined surface portion 43 but also the toilet receiving portion 41 has an appropriate inclination, the stool 300 hardly remains in the toilet body 12.

  This inventor investigated the effect by providing the level | step-difference part 42 with respect to this negative pressure suction type toilet 10 by the following tests.

<Sample 1>
Here, a drainage test was performed on the negative pressure suction toilet 10 shown in FIG. In sample 1, as shown in FIG. 8, the toilet body 12 has an inner diameter D1 of the drain port 32 of 20 mm, an outer diameter D2 of the toilet receiver 41 of 65 mm, and the toilet receiver 41 and the stepped portion 42 from the drain port 32. The combined total height H2 was 35 mm, and the inclination angle θ2 of the inclined surface portion 43 was 30 degrees. Further, the taper height H3 of the stool receiving portion 41 is set to 10 mm. That is, in the sample 1, the height H1 of the stepped portion 42 was 25 mm. Here, the height of the stepped portion 42 is 25 mm, and the inclination of the flight receiving portion 41 is set relatively gently. Here, FIG. 8 schematically shows the periphery of the drain port 32 of the toilet body 12 and does not specifically show each sample.

  Here, wash water 250mL x 2 (500mL), 2 simulated stool (diameter 25mm x length 80mm x 2), toilet paper 2 sheets (width 114mm x length 750mm x 2 sheets), pseudo urine 500ml 12 Then, after depressurizing the negative pressure tank 14 to 0.08 MPa, the on-off valve 15 was opened, and the waste water containing pseudo stool collected in the toilet body 12 was sucked into the negative pressure tank 14.

<Sample 2>
A drainage test similar to that of Sample 1 was performed except that the taper height H3 of the toilet receiving portion 41 was 15 mm and the height H1 of the stepped portion 42 was 20 mm. That is, in sample 2, the height H1 of the stepped portion 42 is lower than in sample 1, and the inclination of the flight receiving portion 41 is stiff.

<Sample 3>
A drainage test similar to that of Sample 1 was performed except that the taper height H3 of the stool receiving portion 41 was 20 mm and the height H1 of the stepped portion 42 was 15 mm. That is, in the sample 3, the height H1 of the step portion 42 is further lower than that of the sample 2, and the inclination of the stool receiving portion 41 is further tightened.

<Sample 4>
FIG. 9 shows the structure of the bottom 12 b of the toilet body 12 in the sample 4. As shown in FIG. 9, the sample 4 has a tapered height H <b> 3 of the toilet receiving portion 41 of 35 mm, does not have a portion corresponding to the stepped portion 42 or the toilet receiving portion 41 (see FIG. 8), and has an inverted conical inclined surface portion. The toilet body 12 having a drain port 32 formed at the bottom of 43 is used. Except for this point, a drainage test similar to Sample 1 was performed.

  The vacuum drainage test was performed three times for each sample. The results are shown in Table 1. Here, “○” indicates that no excrement residue was observed, and some excrement (“Δ” indicates that there was a slight excrement (remaining, but there was no problem in practical use). It is indicated by “x”.

  As shown in Table 1, excrement residue was not observed in Sample 2 and Sample 3. In Sample 2 and Sample 3, as shown in FIG. 8, a stepped portion 42 is used between the stool 300 and the toilet body 12 placed in a state of standing on the bottom 12 b of the toilet body 12. A gap S1 is formed. For this reason, the waste water collected in the toilet body 12 flows into the gap S1. In the case of being sucked into the drain port 32, the action of the water accumulated in the gap S1 is combined and the stool 300 is appropriately pulverized and sucked while being mixed with the drainage.

  In sample 1, the excrement remained in the third time. Here, the excrement remained particularly attached to the stool receiving portion 41. This is presumably because the inclination of the stool receiving portion 41 was gentler in the sample 1 than in the sample 2 and the sample 3. Further, in sample 4, excrement remained in the toilet body 12 in all of the first to third times. As shown in FIG. 9, the stool 300 is attached to the side surface of the toilet body 12, and a part of the stool 300 is attached to the side surface of the toilet body 12 even after being sucked into the drain port 32. There was a tendency to remain.

  Thus, in the negative pressure suction type toilet 10, it is considered that stool is likely to remain if the toilet body 12 has a uniform inclination. In addition, it is considered that the toilet body 12 may be provided with a moderately inclined toilet receiving portion 41 and a stepped portion 42 having an appropriate height.

  Further, as shown in FIG. 1, the negative pressure suction toilet 10 includes a toilet main body 12 which is a bottomed container having a drain port 32 provided at the bottom 12b, a negative pressure tank 14 provided with a suction port 93, A drain line 13 that connects the drain port 32 of the toilet body 12 and the suction port 93 of the negative pressure tank 14, and an opening / closing valve 15 provided in the drain line 13 or the suction port 93 are provided.

  The bottom portion 12b of the toilet body 12 is continuous from the drain port 32 in the horizontal direction, the step receiving portion 41 rising from the periphery of the toilet receiving portion 41, and the upper edge of the step portion 42. An inclined surface portion 43 having a steeper slope than the toilet receiving portion 41 is provided. The drainage pipe 13 has a drainage surface defining part 70 that regulates the height of the drainage accumulated in the toilet body 12 so that the drainage is accumulated at least above the upper edge of the stepped part 42. According to the negative pressure suction type toilet 10, the waste water including the stool 300 (see FIG. 8) accumulated in the toilet body 12 is smoothly sucked into the drain port 32 while the stool 300 is appropriately crushed.

  In this case, the flight receiving part 41 may incline so that it may go upward as it spreads from the drain port 32 in the horizontal direction. As a result, the stool is less likely to remain in the flight receiving portion 41. In addition, when the inclination of the inclination angle θ1 (see FIG. 8) of the stool receiving part 41 becomes tight, a required height is required to widen the opening part of the upper edge of the stool receiving part 41. For this reason, the inclination angle θ1 of the stool receiving portion 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is, for example, approximately 30 degrees or more, and more preferably 40 degrees or more. In addition, the inclination angle θ1 of the stool receiving portion 41 with respect to the vertical axis L1 passing through the center of the drain port 32 is preferably about 80 degrees or less. Thereby, it becomes difficult for the stool to remain in the stool receiving portion 41.

  Further, if the inclined surface portion 43 is steeply inclined, a required height is required to secure a required area for the upper edge of the inclined surface portion 43. Therefore, the inclination angle θ2 (see FIG. 8) of the inclined surface portion 43 with respect to the vertical axis L1 passing through the center of the drain port 32 is preferably about 20 degrees or more, for example. Further, when the inclined surface portion 43 is gentle, the stool 300 and toilet paper are caught on the inclined surface portion 43. For this reason, the said inclination | tilt angle (theta) 2 is good in it being 45 degrees or less. Thereby, an appropriate inclination is obtained in the inclined surface portion 43, and it is possible to more reliably prevent the stool 300 and toilet paper from being caught on the inclined surface portion 43. Further, the inclination angle θ1 of the flight receiving portion 41 and the inclination angle θ2 of the inclined surface portion 43 are preferably θ1> θ2, and the difference (θ1-θ2) is preferably about 10 degrees or more.

  Further, the height H1 (see FIG. 8) of the stepped portion 42 when the peripheral edge portion (upper edge) of the toilet receiving portion 41 is used as a reference is preferably, for example, 5 mm or more and 30 mm or less. As a result, when the long stool in the shape of a bar is arranged in a state where one end is directed toward the drain port 32 and inclined along the inclined surface portion 43 and stands on the bottom 12b of the toilet body 12, the toilet 300 and the toilet body 12 A more appropriate gap S1 is formed between the two. Thereby, the stool 300 can be smoothly sucked from the drain port 32. At this time, the height H <b> 1 of the stepped portion 42 with respect to the peripheral edge portion of the toilet receiving portion 41 is more preferably 10 mm or more and 25 mm or less.

  Moreover, the widest space | interval (distance) of the periphery enclosed by the lower edge of the inclined surface part 43 is good in it being about 75 mm or less. Thereby, for example, a rod-like long stool 300 having a length exceeding 75 mm typically has at least a portion hung on the inclined surface portion 43 and one end directed to the drain port 32 as shown in FIG. The toilet body 12 is disposed in a state of standing on the bottom 12b. Accordingly, the stool 300 can be sucked smoothly from the drain port 32.

  Further, the inner diameter (diameter) of the drain port 32 may be, for example, 15 mm or more and 25 mm or less. Since the negative pressure suction toilet 10 includes the toilet receiving part 41, the step part 42, and the inclined surface part 43, the drainage containing the stool can be smoothly sucked even in a narrow drain port 32 of about 15 mm to 25 mm. .

  Moreover, the flight receiving part 41 may be formed in the circular shape in planar view. In this case, when the inner diameter (diameter) of the drain port 32 is D1, and the inner diameter (diameter) of the peripheral edge of the toilet receiving part 41 (the inner diameter (diameter) of the upper edge of the toilet receiving part 41) is D2, The relationship 5 ≦ (D2 / D1) ≦ 4.0 may be satisfied.

  Moreover, the drainage pipe line 13 may have an introduction pipe 71 extending downward from the drainage port 32 as shown in FIGS. 1 and 6, for example. Thereby, not only the suction force from the negative pressure tank 14 but also the action of gravity acts on the drainage containing the stool 300. For this reason, for example, the drainage port 32 is provided on the side surface, and the pipe 33 connected to the drainage port 32 is formed horizontally, so that the drainage can be drawn much more smoothly than when the drainage is drawn horizontally.

  Further, the drainage pipe line 13 may have a horizontal pulling pipe 72 that extends in the horizontal direction from the lower end of the introduction pipe 71. Furthermore, the intersection angle between the tube axis of the introduction tube 71 and the tube axis of the horizontal pulling tube 72 may be approximately 90 degrees. In this case, since the horizontal pulling pipe 72 is provided so as to be bent from the introduction pipe 71, the traveling direction of the drainage changes to a substantially right angle. The stool 300 contained in the waste water collides violently with the wall surface of the pipeline and is further crushed. Furthermore, since the turbulent flow is generated in the drainage at the bent portion 71c, the feces are mixed more finely with the drainage and the air contained in the drainage. For this reason, the stool 300 and toilet paper flow smoothly without clogging. Below, the structure of the drain pipe 13 is further demonstrated.

  As shown in FIGS. 1 and 6, the negative pressure suction toilet 10 includes a toilet body 12 and a drain pipe 13. The toilet body 12 is a bottomed container having a drain port 32 in the bottom 12b. On the outside of the toilet body 12, the drain pipe 13 includes one end 13 a connected to the drain port 32, a rising portion 13 b extending upward from the one end 13 a, and a lowering portion 13 c extending downward from the rising portion 13 b. It has.

  In the above-described embodiment, the drainage pipe 13 includes the introduction pipe 71 as the one end 13 a connected to the drainage port 32 on the outside of the toilet body 12. A rising tube 73 and a horizontal tube 74 are provided as a rising portion 13b extending upward from the one end portion 13a. In the rising portion 13b, the bottom of the drainage pipe 13 is disposed at a predetermined height position J1 that defines the height of drainage accumulated in the toilet body 12 in the middle of the toilet body 12. Here, as shown in FIG. 1, the rising pipe 73 extends to a predetermined height position J <b> 1 that defines the height of drainage accumulated in the toilet body 12 at the intermediate portion of the toilet body 12. A horizontal tube 74 is connected to the upper end of 73. In the horizontal pipe 74, the bottom of the drain pipe 13 is set at a predetermined height position J1. Further, the horizontal pipe 74 is continuous with the descending portion 13c, and excess drainage flows to the descending portion 13c.

  According to the drainage pipe 13, the height of drainage stored in the toilet body 12 can be defined by the rising portion 13 b and the descending portion 13 c. That is, in such a negative pressure suction type toilet 10, required drainage can be stored in the toilet body 12 before suction. Accordingly, the drainage can be smoothly drawn into the drainage pipeline 13 and the negative pressure tank 14.

  Here, the descending portion 13 c may extend to a position lower than the drain port 32 of the toilet body 12. Thereby, it becomes easy to arrange | position the terminal pipe | tube connected to the negative pressure suction type toilet 10 among the drain pipes 13 low. Laying the piping of the negative pressure suction toilet 10 is facilitated.

  Moreover, the drainage pipe line 13 may have a horizontal pipe part 13d (horizontal pipe 74 in the above-described embodiment) that extends in the horizontal direction continuously from the rising part 13b and is connected to the descending part 13c. By providing the horizontal tube portion 13d, it is possible to suppress a pressure loss (and hence a reduction in suction force) at the connecting portion from the rising portion 13b to the descending portion 13c.

  In this case, the crossing angle between the tube axis V1 of the rising portion 13b and the tube axis V2 of the horizontal tube portion 13d is preferably about 90 degrees as shown in FIG. Since the intersecting angle of the rising portion 13b and the horizontal tube portion 13d is bent at approximately 90 degrees, the wastewater flows without stagnation, and when the stool collides with the pipeline, an appropriate turbulent flow is generated in the stool. Is more crushed. For this reason, drainage is easily sucked smoothly. Specifically, “substantially 90 degrees” is preferably in the range of approximately 90 degrees ± 10 degrees, and is preferably approximately 80 degrees to 100 degrees. Further, it is preferably close to 90 degrees, for example, about 85 degrees to 95 degrees.

  Furthermore, the intersection angle between the tube axis V2 of the horizontal tube portion 13d and the tube axis V3 of the descending portion 13c may be approximately 90 degrees. The crossing angle of the horizontal tube portion 13d and the descending portion 13c is also bent at approximately 90 degrees, so that the wastewater flows without stagnation and moderate turbulence occurs in the drainage when the stool collides with the pipeline. The stool is more crushed. For this reason, drainage is easily sucked smoothly.

  Furthermore, in the above-described embodiment, the one end portion 13 a of the drainage pipe 13 has the introduction pipe 71 as an introduction part extending downward from the drainage port 32. Thereby, since the waste water is drawn vertically from the toilet body 12, there is also an action of gravity, and the waste water is drawn smoothly. Furthermore, the one end part 13a of the drain pipe 13 has a horizontal pulling pipe 72 (horizontal pulling part) extending in the horizontal direction from the lower end of the introducing pipe 71 as the introducing part.

  In this case, when the wastewater including the stool passing through the introduction pipe 71 (introduction part) is drawn in the horizontal direction by the horizontal pulling pipe 72 (lateral drawing part), the traveling direction is changed, and the stool contained in the drainage is connected to the pipeline Collide with. At this time, the stool contained in the drainage is pulverized and reduced at the very initial stage of being drawn from the toilet body 12, and turbulent flow is generated in the drainage. . Also in this case, the crossing angle between the tube axis V4 of the introduction tube 71 (introduction portion) and the tube axis V5 of the horizontal drawing tube 72 (lateral drawing portion) may be approximately 90 degrees.

  In the above-described embodiment, as shown in FIG. 6, the rising tube 73 as the rising portion 13b is continuous with the horizontal pulling tube 72 as the horizontal pulling portion. The crossing angle between the tube axis V5 of the horizontal pulling tube 72 and the tube axis V1 of the rising tube 73 is approximately 90 degrees. For this reason, even in the bent portion 81 extending from the horizontal pulling pipe 72 to the rising pipe 73, the stool contained in the wastewater is crushed and becomes smaller, turbulent flow is generated in the wastewater, and air is more efficiently involved in the wastewater.

  Moreover, in embodiment mentioned above, as shown in FIG. 1 and FIG. 2, it has the outer frame 11 surrounding the toilet body 12 periphery. The rising pipe 73 as the rising part 13 b and the down pipe 75 as the lowering part 13 c are provided in a space outside the toilet body 12 and inside the outer frame 11. Thereby, the rising part 13b and the descent | fall part 13c can be arrange | positioned in the inconspicuous position under the outer frame 11. FIG.

  Further, as shown in FIG. 1, the drainage pipe line 13 includes an end pipe 76 that is continuous from the downcomer 75 as the descending part 13 c and extends toward the outside of the outer frame 11. In this case, the end pipe 76 is disposed at a position where the ceiling of the drain pipe 13 is lower than the drain port 32. Thereby, the connecting pipe 77 connected to the end pipe 76 can be laid near the floor. In this case, the crossing angle between the tube axis V3 of the downcomer pipe 75 serving as the descending portion 13c and the tube axis V6 of the end tube 76 serving as the end portion may be approximately 90 degrees. For this reason, since the turbulent flow can be generated in the drainage and the crushed stool and air can be entrained in the drainage even at the position where the end portion is connected to the descending part 13c, the drainage can be smoothly conveyed.

  Further, the inner diameter of the drainage pipe 13 may be made smaller in the end pipe 76 as the end portion of the drainage pipe 13. That is, the end pipe 76 as the end of the drainage pipe 13 passes through the rising pipe 73 and the downfalling pipe 75, and the stool and toilet paper contained in the drainage are crushed and made fine. For this reason, in this end pipe 76, even if it makes a pipe line thin, drainage can flow smoothly. Further, in the end pipe 76, by reducing the pipe line, it is possible to suppress a decrease in the suction force.

  The drainage pipe 13 has a rising pipe 73 as a rising part 13 b and a down pipe 75 as a lowering part 13 c, and the sitting position of the toilet body 12 in a space outside the toilet body 12 and inside the outer frame 11. It is good to be provided in the space except the front side. Thereby, the rising part 13b and the descent | fall part 13c of the drain pipe 13 can be arrange | positioned in the position which does not become obstructive in use.

  In the above-described embodiment, as shown in FIG. 1, a space for providing the rising pipe 73 and the descending pipe 75 is provided on the rear side of the toilet body 12 as the piping space 65 of the drainage pipe 13. The arrangement of the drain pipe 13 is not limited to this. For example, the space where the rising pipe 73 and the downfall pipe 75 are provided may be provided beside the toilet body 12, for example, below the position where the armrests 24 and 25 are provided, as shown in FIG. 13. In this case, you may arrange | position the end pipe 76 toward the side of the negative pressure suction type toilet 10 main body (toilet side element 10A (refer FIG. 1)).

  Although not shown, there may be a case where the space for providing the rising portion 13 b and the descending portion 13 c of the drain pipe 13 cannot be secured inside the outer frame 11 outside the toilet body 12. In that case, the rising portion 13b and the descending portion 13c of the drain pipe 13 may be provided outside the outer frame 11 of the main body (the toilet element 10A (see FIG. 1)) of the negative pressure suction toilet 10. Moreover, the backrest 23 and the armrests 24 and 25 are not necessarily required for the negative pressure suction type toilet 10. In this case, the negative pressure suction toilet 10 main body (the toilet bowl side element 10A (see FIG. 1)) can be configured more compactly.

  Further, the drain line 13 is provided with a connection pipe 77 as a connection part connected to the negative pressure tank 14, and is connected to a suction port 93 of the negative pressure tank 14. In this way, the drainage pipe line 13 connects the drainage port 32 of the toilet body 12 and the suction port 93 of the negative pressure tank 14. Moreover, the on-off valve 15 for operating the suction timing may be provided in the drain pipe 13 or the suction port 93. Furthermore, the on-off valve 15 may be provided in the suction port 93 of the negative pressure tank 14, as shown in FIG.

  Although various embodiments and test examples of the present invention have been described above, the embodiments and test examples given here are not intended to limit the present invention unless otherwise specified.

  For example, the toilet main body 12 in the above-described embodiment shows a form in which the inner sleeve 30 is attached to the bottom 12b, but is not limited thereto. For example, the toilet body 12 may integrally form the toilet receiving portion 41, the stepped portion 42, and the inclined surface portion 43 by injection molding. In this case, although the thickness of the toilet main body 12 is desired to be thin, a considerable force acts on the bottom 12 b of the toilet main body 12, particularly in the vicinity of the drain port 32 and the drain port 32, due to the suction force. For this reason, instead of attaching the inner sleeve 30 to the inside of the bottom 12b of the toilet body 12, an illustration is omitted, but an outer sleeve is attached to the outside of the bottom of the toilet body 12, and the bottom 12b of the toilet body 12 is attached. The required strength may be ensured.

  Moreover, although the flight receiving part 41 in the said embodiment inclines upward as it spreads in the horizontal direction from the drain port 32, it is not limited to this. The toilet receiver 41 may extend from the drain port 32 without inclining in the horizontal direction. In this case, for a thick and long stick-like stool, the step S can ensure a relatively wide gap S1 between the stool and the toilet body 12. For this reason, some stool may remain in the corner of the flight receiving portion 41, but most of the stool is sucked smoothly.

  Moreover, as shown in FIG. 1, the flight receiving part 41, the level | step-difference part 42, and the inclined surface part 43 in embodiment mentioned above are circularly formed in planar view so that the drain port 32 may be enclosed, but it is limited to this. Not. For example, in the plan view of the flight receiver 41, the shape is not limited to a circle but may be a rectangle or an ellipse, for example. Further, the flight receiving portion 41 does not have to be formed around the drain port 32 and may be formed at least in the circumferential direction around the drain port 32. FIG. 10 is a view showing a modification of the toilet body 12. For example, as shown in FIG. 10, the stool receiving portion 41, the stepped portion 42, and the inclined surface portion 43 may be formed in a part of the drain port 32 in the circumferential direction.

  Further, as shown in FIG. 1, in the above-described embodiment, the drain line 13 communicating with the drain port 32 is formed with a pipe line 33 extending downward (vertically downward) from the drain port 32. The direction in which the conduit 33 is formed is not limited to this. FIG. 11 is a view showing a modification of the toilet body 12. For example, as shown in FIG. 11, the pipe line 33 connected to the drain port 32 may be inclined obliquely downward.

  Needless to say, the material of the toilet body 12 and the inner sleeve 30 is not limited to resin as in the above embodiment, and can be changed as appropriate. In addition, the specific configurations of the drain pipe 13, the negative pressure tank 14, the on-off valve 15, etc. can all be arbitrarily changed within the range intended by the present invention.

  In addition, although illustration is abbreviate | omitted, you may connect the discharge port 32 (a drainage port is also called) of the toilet bowl main body 12 and the drainage pipe line 13 by a detachable connection part. Thereby, while maintainability improves, furthermore, the toilet bowl main body 12 may be used as a bucket, and the negative pressure suction toilet 10 may be used as a pumping portable toilet.

  Hereinafter, the control of the negative pressure suction toilet 10 will be further described. As shown in FIG. 1, the proposed negative pressure suction toilet 10 includes a toilet body 12, a negative pressure tank 14, an open / close valve 15, a vacuum pump 92, a discharge valve 95, a control device 100, and the like. It has. Here, the structure of the negative pressure suction toilet 10, particularly the toilet-side element A is not limited to the form shown in FIG. 1.

  The toilet body 12 has a discharge port 32 (referred to as a “drain port” in the above-described example) at the bottom. The negative pressure tank 14 is connected to the outlet 32 of the toilet body 12 through the drain line 13. The on-off valve 15 is a valve that opens and closes the connection between the negative pressure tank 14 and the toilet body 12. The vacuum pump 92 is a pump that is attached to the negative pressure tank 14 and depressurizes the negative pressure tank 14. The discharge valve 95 is a valve that opens and closes a discharge port 94 provided at the bottom of the negative pressure tank 14.

As shown in FIG. 7, the control device 100 executes the following steps A to C as basic control.
In step A, the vacuum pump 92 is operated to bring the negative pressure tank 14 into a negative pressure state.
Step B opens the on-off valve 15.
Step C opens the discharge valve 95.

  By executing Step A to Step C, in the negative pressure suction toilet 10, the excrement accumulated in the toilet body 12 is sucked into the negative pressure tank 14 and further discharged from the negative pressure tank 14.

  That is, in step A, the vacuum pump 92 is activated and the negative pressure tank 14 is in a negative pressure state. At this time, for example, the operating time of the vacuum pump 92 may be determined in advance. Thereby, the negative pressure tank 14 is decompressed to a predetermined negative pressure state. Next, in step B, the on-off valve 15 is opened. As a result, the excreta accumulated in the toilet body 12 is sucked into the negative pressure tank 14 in a negative pressure state. Next, in step C, the discharge valve 95 is opened. As a result, excreta sucked into the negative pressure tank 14 is discharged. In this case, for example, as shown in FIG. 1, a sewage facility is provided at the tip of the discharge port 94 of the negative pressure tank 14 to discharge waste water (sewage) including excrement like the waste water 200. Good.

  In this case, the excrement sucked into the negative pressure tank 14 can be discharged from the discharge port 94 by natural flow every time. Moreover, since the negative pressure tank 14 is emptied every time, the capacity of the negative pressure tank 14 can be reduced to some extent, and the negative pressure tank 14 can be downsized. Further, since the natural flow is used for the discharge from the negative pressure tank 14, the entire system can be made compact and the cost can be further reduced.

  Furthermore, the negative pressure suction toilet 10 may include a pressure reducing valve 92c that opens and closes the connection between the negative pressure tank 14 and the vacuum pump 92. In this case, in step A, the control device 100 may operate the vacuum pump 92 with the pressure reducing valve 92c opened, and close the pressure reducing valve 92c when the vacuum pump 92 is stopped. In this case, the decompression of the negative pressure tank 14 can be appropriately adjusted by the decompression valve 92c.

  Further, for example, the toilet seat 22 provided in the toilet main body 12 may be provided with a seating sensor 140 that detects that a person is sitting, as shown in FIG. In this case, the control device 100 may be configured to receive the signal from the seating sensor 140 that detects that a person is sitting on the toilet seat 22 and execute Step A. In this case, the seating sensor 140 may be a load sensor or an infrared sensor. In addition, although the seating sensor 140 has illustrated the form provided in the toilet seat 22, the structure of the seating sensor 140 is not limited to this form. Although not shown, the seating sensor 140 may be, for example, an infrared sensor (proximity sensor) provided on the backrest 23 to detect that a person is sitting on the toilet seat 22.

Further, in order to prevent malfunction , step A is executed when, for example, a state in which a person is seated continues for a predetermined time (for example, about 8 seconds) based on a signal from the seating sensor 140. The control device 100 may be configured. Note that the timing at which Step A is executed after receiving a signal from the seating sensor 140 that detects that a person is sitting on the toilet seat 22 can be arbitrarily set. By providing the seating sensor 140 in this manner, a special operation such as pressing a switch is not required separately, and the negative pressure tank 14 is in a negative pressure state in advance. For this reason, step A which makes the negative pressure tank 14 a negative pressure state without requiring any special human operation is executed. Further, in this case, since the negative pressure tank 14 is appropriately in a negative pressure state, step B sucked by the negative pressure tank 14 can be smoothly executed after defecation is completed.

  Further, when the seating sensor 140 is provided as described above, the control device 100 receives a signal from the seating sensor 140 that detects that the person has left the toilet seat from the state where the person is sitting on the toilet seat 22. Thus, step B may be executed at an appropriate timing. That is, in this case, the toilet main body 12 detects that a person has been sitting on the toilet seat 22 and defecates, and then has left the toilet seat 22, and then, after a while, the on-off valve 15 opens at an appropriate timing. Then, excreta accumulated in the toilet body 12 is sucked into the negative pressure tank 14. In this case, the user can use the negative pressure suction toilet 10 without operating an operation unit 110 of the control device 100 described later.

  In addition, when the suction is completed in Step B, the control device 100 may close the on-off valve 15 at an appropriate timing. In addition, for example, in step C, the control device 100 may open the discharge valve 95 with the open / close valve 15 closed. At this time, if the on-off valve 15 is open, the odor goes up to the toilet body 12 through the drain pipe 13. For this reason, in step C, the discharge valve 95 may be opened with the on-off valve 15 closed. In this way, by opening the discharge valve 95 with the open / close valve 15 closed, it is possible to prevent the odor in the negative pressure tank 14 from leaking to the toilet.

  Further, as shown in FIG. 1, an air release valve 96 that opens the negative pressure tank 14 to the atmosphere may be provided. In this case, the control device 100 may open the atmosphere release valve 96 in Step C. Thus, when the excrement sucked into the negative pressure tank 14 is discharged from the discharge port 94, the negative pressure tank 14 is opened to the atmosphere, so that the excrement can be discharged smoothly. In this case, the air release valve 96 may be opened earlier than the discharge valve 95 in Step C. Thus, since the timing of opening the atmosphere of the negative pressure tank 14 is first, when the excrement accumulated in the negative pressure tank 14 is discharged from the discharge port 94, the atmosphere is taken into the negative pressure tank 14. For this reason, excrement accumulated in the negative pressure tank 14 can be discharged more smoothly, and sound generated at the time of discharge and scattering of waste water including excrement in the negative pressure tank 14 can be reliably reduced.

In addition, when the timing of opening the atmosphere of the negative pressure tank 14 is first, the odor in the negative pressure tank 14 leaks to the outside in terms of the time and opening after the atmosphere release valve 96 is opened until the discharge valve 95 is opened. It is good that the amount is reduced. The time from the opening of the air release valve 96 to the opening of the discharge valve 95 may be set, for example, from about 0.1 seconds to about 1 second . Further, the air release valve 96 may be closed at the same time as the discharge valve 95 is closed, before the discharge valve 95 is closed, or immediately after the discharge valve 95 is closed. Thereby, the odor in the negative pressure tank 14 can be prevented from leaking outside.

  Moreover, you may provide the operation part 110 (operation switch) which operates the control apparatus 100. FIG. Here, the operation part 110 may be arrange | positioned at the toilet bowl side in which the toilet bowl main body 12 was provided. That is, as shown in FIG. 1, the negative pressure tank 14, the vacuum pump 92, and the like may be provided outdoors. On the other hand, the toilet body 12 is disposed indoors and used indoors. The operation unit 110 (operation switch) for operating the control device 100 is arranged indoors on the side (toilet bowl side) on which the toilet bowl body 12 is arranged, so that the convenience of the user is achieved.

  Further, the operation unit 110 may include a switch for issuing a command for executing Step A to the control device 100. That is, the example in which the seating sensor 140 is provided in the toilet seat 22 and the control of Step A is started has been described. However, it may be configured such that Step A is started by operating a switch provided in the operation unit 110. Good. By providing such a switch in the operation unit 110, the user can operate the vacuum pump 92.

  Further, the operation unit 110 may include a switch for issuing a command for executing Step B to the control device 100. In other words, the operation of opening the opening / closing valve 15 and sucking the waste collected in the toilet body 12 into the negative pressure tank 14 may be started by the user operating a switch provided in the operation unit 110. Thereby, the excrement accumulated in the toilet body 12 can be sucked at the timing intended by the user.

  Further, the negative pressure suction toilet 10 may include a water injection tank 120. In this case, the control device 100 may include Step D for pouring water from the water filling tank 120 to the toilet body 12 before Step B is executed. Further, a switch for issuing a command to execute step D to the control device 100 may be provided. Such a switch may be provided in the operation unit 110, for example. Further, the control device 100 may include a step E of pouring water from the water filling tank 120 into the toilet body 12 after the on-off valve 15 is closed after step B. Here, as shown in FIG. 1, the water injection tank 120 includes a water injection pump 122, and water injection may be performed by operating the pump 122. Although not shown, the water injection tank 120 is provided with an opening / closing valve (for example, an electromagnetic valve) instead of the pump 122. By opening the opening / closing valve, water is poured into the toilet body 12 by natural flow, The water injection may be stopped by closing.

  Further, the control device 100 may perform sequence control managed by a timer in each of the control steps from Step A to Step C. In this case, the control configuration is simple and the system can be configured at low cost.

  Further, the negative pressure suction toilet 10 may include a barometer 97 that detects the internal pressure of the negative pressure tank 14 as shown in FIG. In this case, the control device 100 may set the internal pressure of the negative pressure tank 14 to a predetermined value based on the internal pressure of the negative pressure tank 14 detected by the barometer 97 in step A.

  FIG. 14 shows an example of a flowchart of the control device 100 including such steps D and E. FIG. 15 shows another example of a flowchart of the control device 100 including the steps D and E.

  FIG. 14 shows a configuration having an operation unit 110 that is manually operated by a user. In the form shown in FIG. 14, the user operates the negative pressure tank 14 and the vacuum pump 92 by the operation unit 110. Here, as shown in FIG. 1, when the user finishes excretion into the toilet body 12, the control device 100 executes Step A by the user operating the operation unit 110.

<< Step A >>
In Step A, the pressure reducing valve 92c is opened and the vacuum pump 92 is operated (S101). Here, when the vacuum pump 92 is activated for a predetermined time and the negative pressure tank 14 is depressurized to a predetermined negative pressure state (for example, 0.08 MPa), the pressure reducing valve 92c is closed, and the vacuum pump 92 stops (S102)

<< Step D >>
Further, the control device 100 executes Step D simultaneously with Step A. In Step D, for example, the pump 122 provided in the water injection tank 120 is operated to start water injection from the water injection tank 120 to the toilet body 12 (S103). Here, the amount of water injection is set to a predetermined amount, and for example, the operating time of the pump 122 may be set in advance and adjusted. When the water injection is completed, the pump 122 stops (S104).

<< Step B >>
When step A is completed, the control device 100 executes step B. In step B, the on-off valve 15 is opened (S105). Before step B is executed, step A is completed, and the negative pressure tank 14 is depressurized to a predetermined negative pressure state (for example, 0.08 MPa). For this reason, when the on-off valve 15 is opened in step B, the sewage containing excrement accumulated in the toilet body 12 is sucked into the negative pressure tank 14 with vigor. When the suction by the negative pressure tank 14 is completed, the on-off valve 15 is closed (S106).

<< Step C >>
Next, the control device 100 executes Step C. In Step C, first, the atmosphere release valve 96 is opened (S107). Then, the discharge valve 95 is opened with a slight delay (S108). Thereby, the sewage containing the excrement accumulated in the negative pressure tank 14 is discharged from the discharge port 94 to the sewage basin 200. When the discharge of sewage from the negative pressure tank 14 to the sewage mass 200 is completed, the air release valve 96 and the discharge valve 95 are closed (S109). Thereby, the inside of the negative pressure tank 14 becomes empty.

<< Step E >>
In this embodiment, the control device 100 executes Step E simultaneously with Step C. In step E, the pump 122 is operated (S110). By the operation of the pump 122, a predetermined amount of water is stored in the toilet body 12. Such water injection is provided for the next defecation and urination, and prevents the toilet body 12 from being soiled and prevents the odor from rising from the drain line 13. In Step E, for example, about 100 mL of water may be poured. When the predetermined amount of water injection is completed, the pump 122 is stopped (S111).

  Steps A to E in the form according to FIG. 14 are automatically and continuously executed by sequence control after the user completes the excretion to the toilet body 12 and the user performs step A, for example. Thus, the control of the control device 100 may be constructed.

  Next, the flowchart shown in FIG. 15 will be described. Here, the negative pressure suction type toilet 10 includes a seating sensor 140 that detects that a person is sitting on the toilet seat 22. In addition, about each step AE here, since the same operation | movement as the form of FIG. 14 is each performed, the description is abbreviate | omitted suitably.

<< Step A >>
In this case, the control device 100 receives a signal from the seating sensor 140 that detects that a person is sitting on the toilet seat 22 and executes Step A. Here, step A in which the signal indicating that a person is sitting on the toilet seat 22 is received from the seating sensor 140 and the negative pressure tank 14 is depressurized is executed (S101, S102).

<< Step D >>
Here, after the user excretes (S010), Step D is executed by the user's operation (manual switch ON: S011), and water is poured into the toilet body 12 (S103, S104). In this case, for example, the user may operate a switch provided in the operation unit 110 for executing Step D.

<< Step B, Step C, Step E >>
Thereafter, the control device 100 detects that a person has left the toilet seat 22, and executes Step B (S105, S106). Thereby, the sewage containing the excrement accumulated in the toilet body 12 is sucked into the decompressed negative pressure tank 14. Thereafter, the control device 100 executes Step C and Step E. Here, Step B, Step C, and Step E are sequentially executed when the control device 100 detects that a person has left the toilet seat 22.

  As mentioned above, although various control about the control of the control apparatus 100 was demonstrated, the Example mentioned here does not limit this invention unless there is particular mention.

  As described above, the present invention provides a negative pressure suction type toilet that can realize a smooth wastewater treatment, and is industrially applicable.

DESCRIPTION OF SYMBOLS 10 Negative pressure suction type toilet 10A Toilet side element 10B Negative pressure tank side element 11 Outer frame 12 Toilet body main body 12a Upper part 12b Bottom part 12c Recessed part 13 Drain pipe 13a One end part 13b Rising part 13c Lowering part 13d Horizontal pipe part 14 Negative pressure tank 15 On-off valve 21 Base 22 Toilet seat 23 Backrest 24, 25 Armrest 26-29 Leg 30 Inner sleeve 31 Upper opening 32 Drainage port (discharge port)
33 Pipe 36 Upper shaft portion 36a Upper cylindrical portion 36b Step 36c Lower cylindrical portion 37 Lower shaft portion 37a Shaft 41 Stool receiving portion 42 Stepped portion 43 Inclined surface portion 51 Upper cylindrical portion 52 Restriction portion 53 Lower cylindrical portion 54 Bottom 55 Insertion hole 56 Screw hole 57 Sealing material 58 O-ring 59 Screw 60 Cover 62 Through hole 65 Piping space 70 Drainage surface defining portion 71 Introducing pipe 71a Receiving port 71b Receiving port 71c Bent portion 72 Horizontal pulling tube 73 Standing tube 74 Horizontal tube 75 Lowering tube 76 End pipe 76a End pipe end 77 Connecting pipe 81-84 Joint 91 Tank body 92 Vacuum pump 92a Pipe 92b Air filter 92c Pressure reducing valve 93 Suction port 94 Outlet port 95 Outlet valve 96 Atmospheric release valve 97 Barometer 100 Controller 110 Operation Switch (operation unit)
120 tank (water injection tank)
122 pump (water injection pump)
124 pipeline (water injection pipe)
140 Seating sensor 200 Sewage masu 250 Building wall 300 Flight (simulated flight)
H1 Height of the stepped portion 42 H2 Total height of the toilet receiving portion 41 and the stepped portion 42 combined H3 Tapered height of the toilet receiving portion 41 J1 Height of the bottom of the horizontal pipe 74 (predetermining the height of the drainage) Determined height position)
L1 Vertical axis passing through the center of the drain port 32 (center axis of the inner sleeve 30)
P1 External force S1 acting on the stool 300 Clearance θ1 Inclination angle θ2 of the toilet receiving portion 41 Inclination angle of the inclined surface portion 43

Claims (16)

A toilet body having an outlet at the bottom;
A negative pressure tank connected through a drain line to the outlet of the toilet body;
A suction port provided in the negative pressure tank and connected to the drain pipe;
An on-off valve provided at the suction port for opening and closing a connection between the negative pressure tank and the toilet body;
A vacuum pump attached to the negative pressure tank;
A discharge valve for opening and closing a discharge port provided at the bottom of the negative pressure tank;
A pressure reducing valve for opening and closing a connection between the negative pressure tank and the vacuum pump;
A control device,
The controller is
A step A in which the vacuum pump is operated while the pressure reducing valve is opened, and the pressure reducing valve is closed to bring the negative pressure tank into a negative pressure state when the vacuum pump is stopped;
Step B for opening the on-off valve;
Performing the step C of opening the discharge valve;
Negative pressure suction toilet. An air release valve for opening the negative pressure tank to the atmosphere;
The controller is
In step C, the atmosphere release valve is opened.
The negative pressure suction type toilet according to claim 1. A toilet body having an outlet at the bottom;
A negative pressure tank connected through a drain line to the outlet of the toilet body;
A suction port provided in the negative pressure tank and connected to the drain pipe;
An on-off valve provided at the suction port for opening and closing a connection between the negative pressure tank and the toilet body;
A vacuum pump attached to the negative pressure tank;
A discharge valve for opening and closing a discharge port provided at the bottom of the negative pressure tank;
An air release valve for opening the negative pressure tank to the atmosphere;
A control device,
The controller is
Activating the vacuum pump to bring the negative pressure tank into a negative pressure state; and
Step B for opening the on-off valve;
Opening the atmosphere release valve and opening the discharge valve C.
Negative pressure suction toilet.   The negative pressure suction toilet according to claim 2 or 3, wherein, in the step C, the air release valve opens earlier than the discharge valve. The controller is
In step C, with the on-off valve closed, the discharge valve is opened.
The negative pressure suction type toilet according to any one of claims 1 to 4. A toilet seat provided in the toilet body,
A seating sensor for detecting that a person is sitting on the toilet seat;
The controller is
Receiving a signal from the seating sensor that a person has been seated on the toilet seat, and executing step A;
The negative pressure suction type toilet according to any one of claims 1 to 5. The controller is
Receiving a signal from the seating sensor that detects that a person has left the toilet seat from a state in which the person is sitting on the toilet seat, and executing the step B;
The negative pressure suction toilet according to claim 6.   The negative pressure suction type toilet according to any one of claims 1 to 7, further comprising an operation unit for operating the control device.   The negative pressure suction toilet according to claim 8, wherein the operation unit is disposed on a toilet side where the toilet body is provided.   The negative pressure suction toilet according to claim 8 or 9, wherein the operation unit includes a switch for issuing a command to execute Step A to the control device.   The negative pressure suction type toilet according to any one of claims 8 to 10, wherein the operation unit includes a switch for issuing a command to execute Step B to the control device. With a water injection tank,
The negative pressure suction method according to any one of claims 1 to 11, wherein the control device includes a step D of pouring water into the toilet body from the water filling tank before the step B is executed. toilet.   The negative pressure suction toilet according to claim 12, further comprising a switch for issuing a command to execute the step D to the control device.   The negative pressure suction toilet according to claim 12 or 13, wherein the control device includes a step E of pouring water from the water filling tank into the toilet body after the on-off valve is closed after the step B.   The negative pressure suction type toilet according to any one of claims 1 to 14, wherein the control device is controlled by a sequence control managed by a timer. A barometer for detecting the internal pressure of the negative pressure tank;
The control device according to any one of claims 1 to 15, wherein in step A, the internal pressure of the negative pressure tank is set to a predetermined value based on the internal pressure of the negative pressure tank detected by the barometer. The negative pressure suction type toilet described in one item.

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