JP2008115551A - Portable toilet bowl with sanitary washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To jet washing water from a leading end of a washing water jet nozzle by supplying the washing water to the washing water jet nozzle by means of a manual pump mechanism. <P>SOLUTION: This portable toilet bowl 10 with a sanitary washing device comprises a toilet tank which includes a tube portion 13 and a toilet seat 14, a manual operation lever 16, a washing water vessel 18, the pump mechanism 30, the washing water jet nozzle 20, and the like. A piston shaft can be axially moved by the operation of the manual operation lever 16, and a position of the washing water jet nozzle 20 can be shifted. The pump mechanism 30 is divided into a vessel-side pressure chamber and a nozzle-side pressure chamber by a piston sliding in a cylinder. The piston is provided with a piston check valve; a vessel-side check valve is provided between the vessel-side pressure chamber and the washing water vessel 18; and a nozzle-side check valve is provided between the nozzle-side pressure chamber and the washing water jet nozzle 20. These check valves are operated in accordance with the motion of the piston shaft by the manual operation lever 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable toilet with a sanitary washing device, and more particularly to a portable toilet with a sanitary washing device that ejects washing water from a washing water jet nozzle attached to a portable toilet tank.

  2. Description of the Related Art Conventionally, sanitary washing apparatuses that perform washing by spraying washing water toward a local part of a person sitting on a toilet seat have been widely used. This sanitary cleaning device typically supplies cleaning water at an appropriate temperature toward the nozzle that ejects the cleaning water. For this purpose, a pipe connected to an external water absorption system is provided inside the sanitary cleaning device. In this pipe, a hot water tank for heating, an on-off valve, a flow rate adjusting valve for adjusting the water flow of the washing water from the nozzle, and the like are attached. In addition to the manual knob adjustment type, a motor-driven type capable of remote control is used as the flow rate adjustment valve.

  For example, in Patent Document 1, the current valve opening degree is set in advance for the setting of the valve opening degree of a motor-driven flow rate control valve provided in a flow path system of a nozzle device that ejects cleaning water toward a local part. The valve opening is not changed when it is included in the reference value consisting of the upper and lower limits of the valve opening, and when the valve opening is not included in the reference value, the cleaning water is supplied to the nozzle device. Prior to this, it is disclosed that the valve opening is changed to a reference value.

  Further, in Patent Document 2, in a cleaning nozzle that performs cleaning by jetting cleaning water, a step portion is formed by increasing the outer diameter of a water channel member that opposes a portion of an injection port that injects cleaning water. It is disclosed that the cross-sectional area of the flow path in the mouth is made smaller than that of other parts, and thereby the washing water ejected from the ejection port is made mist.

JP-A-6-42027 JP-A-7-11686

  Thus, although the sanitary washing apparatus is widely used, these are fixed to the toilet of a residence. On the other hand, a portable emergency toilet set up in an emergency such as a disaster is not provided with a sanitary washing device. Further, in nursing care facilities that have been increasing in recent years, portable toilets are often used for people who are physically disabled, but these are not equipped with a sanitary washing device.

  One of the reasons is considered to have a problem of supplying cleaning water to the ejection nozzle. In the conventional sanitary washing apparatus, city water having an appropriate water head pressure from the outside is used, and if necessary, an appropriate electric flow control valve is used. In portable toilets and the like, it is often difficult to use city water having an appropriate head pressure. Therefore, it is conceivable to use an appropriate water tank and a manual pump.

  A well-known technique for manual pumps is a hand pump that draws water from a well. In this method, a piston having a check valve is manually moved up and down along a cylinder provided at an upper portion of a pipe leading to groundwater. When raising the piston toward the ground surface, the check valve closes and the pipe side is depressurized, so that the groundwater is sucked up toward the ground surface, and then when the piston is pushed down toward the ground surface, the check valve opens and the sucked water Overflows to the top of the piston, is released to atmospheric pressure and pumped out.

  Thus, the well-known manual well pump can pump water. However, since the pumped water is released to atmospheric pressure, the mechanism as it is cannot supply water having an appropriate head pressure for ejecting the washing water from the ejection nozzle.

  An object of the present invention is to provide a portable toilet with a sanitary washing device that allows a washing water jet nozzle to be supplied to a washing water jet nozzle and ejected from its tip using a manual pump mechanism.

  A portable toilet with a sanitary washing device according to the present invention is divided into two pressure chambers by a washing water jet nozzle attached to a portable toilet tub, a washing water container, and a piston sliding in the cylinder. A pump mechanism in which the pressure chamber is a container-side pressure chamber connected to the washing water container and the other pressure chamber is a nozzle-side pressure chamber connected to the washing water jet nozzle, and between the washing water container and the container-side pressure chamber The cleaning water jet is provided between the cleaning valve and the nozzle side pressure chamber, and is opened to the atmospheric pressure. A nozzle-side check valve for preventing atmospheric pressure from communicating from the nozzle to the nozzle-side pressure chamber, and a piston check valve provided on the piston, wherein the pressure in the container-side pressure chamber is higher than the pressure in the nozzle-side pressure chamber Sometimes container side pressure chamber and nozzle side A piston check valve that shuts off between the nozzle-side pressure chamber and the container-side pressure chamber when the pressure in the container-side pressure chamber is lower than the pressure in the nozzle-side pressure chamber; A piston moving mechanism that moves the piston relative to the cylinder by an operation, and the piston moving mechanism moves the piston from the nozzle side pressure chamber side toward the container side pressure chamber side to thereby adjust the pressure in the container side pressure chamber. To make the piston check valve communicate with the nozzle side pressure chamber higher than the pressure in the nozzle side pressure chamber, close the container side check valve and the nozzle side check valve, and wash water in the container side pressure chamber into the nozzle side pressure chamber. And by moving the piston from the container side pressure chamber side toward the nozzle side pressure chamber side, the pressure in the container side pressure chamber is made lower than the pressure in the nozzle side pressure chamber and the piston check valve is shut off, Container side reverse Open the valve and the nozzle side check valve to introduce the cleaning water from the cleaning water container into the container side pressure chamber, pressurize the cleaning water in the nozzle side pressure chamber and supply it to the cleaning water ejection nozzle to supply the cleaning water It is characterized by ejecting.

  The portable toilet with a sanitary washing device according to the present invention preferably has a nozzle moving mechanism that is connected to the piston moving mechanism and moves the washing water jet nozzle in conjunction with the movement of the piston.

  With the above configuration, the portable toilet with a sanitary washing device includes a piston check valve provided between the container-side pressure chamber and the nozzle-side pressure chamber, which is partitioned by the piston of the pump mechanism, the washing water container, and the container-side pressure. A container-side check valve provided between the chamber and a nozzle-side check valve provided between the washing water jet nozzle and the nozzle-side pressure chamber. The nozzle check valve is provided between the cleaning water jet nozzle that is opened to the atmosphere and the nozzle side pressure chamber, and has a function of preventing the nozzle side pressure chamber from being opened to the atmosphere.

  The operation of these three check valves accompanying the movement of the piston is as follows. That is, when the piston is moved from the nozzle side pressure chamber side toward the container side pressure chamber side, the piston check valve communicates, and the container side check valve and the nozzle side check valve are closed. Thereby, the inside of the cylinder of the pump mechanism becomes a sealed space, and the cleaning water in the container side pressure chamber can be moved to the nozzle side pressure chamber.

  On the other hand, when the piston is moved from the container side pressure chamber side toward the nozzle side pressure chamber side, the piston check valve is shut off, and the container side check valve and the nozzle side check valve are opened. Thereby, the pressure of the container side pressure chamber is lowered by the movement of the piston, and the cleaning water is introduced from the cleaning water container into the container side pressure chamber. In addition, as described above, the nozzle-side check valve works to prevent the nozzle-side pressure chamber from being released to the atmosphere, so that the pressure in the nozzle-side pressure chamber increases due to the movement of the piston, and the pressurized water is discharged from the washing water ejection nozzle. To supply the washing water.

  In this way, by the interaction of the three check valves, the cleaning water is pumped from the cleaning water container into the cylinder container pressure chamber, the pumped cleaning water is transferred to the nozzle pressure chamber, and the nozzle pressure chamber cleaning water is discharged. Pressurized and supplied to the washing water jet nozzle. Therefore, it is possible to supply the cleaning water to the cleaning water jet nozzle using the manual pump and eject the cleaning water from the tip thereof.

  Also, since it has a nozzle movement mechanism that is connected to the piston movement mechanism and moves the washing water ejection nozzle in conjunction with the movement of the piston, for example, the washing water ejection nozzle is usually retracted and washed when cleaning is required. The water jet nozzle can be moved to jet the washing water, which is convenient.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the portable toilet is described as having a size that can be carried by hand, but other sizes may be used, for example, it may be installed inside a box-type emergency toilet with a door. .

  FIG. 1 is a perspective view showing a configuration of a portable toilet 10 with a sanitary washing device. The portable toilet 10 with a sanitary washing device includes a toilet tub 12, a manual operation lever 16, a washing water container 18, a pump mechanism 30, and a washing water jet nozzle 20.

  The toilet tub 12 includes a cylindrical portion 13 having an opening in the upper portion and a toilet seat 14 provided in the opening of the cylindrical portion 13 and having a substantially U-shaped planar shape. The tubular portion 13 and the toilet seat 14 may be configured separately and assembled to form the toilet tub 12, or the tubular portion 13 and the toilet seat 14 may be integrated to form the toilet tub 12. The overall size of the stool 12 is such that an adult can sit down. For example, the height is about 40 cm to about 50 cm, and the outer diameter of the tubular portion 13 is about 40 cm to about 60 cm. It can be. Such a stool 12 can be obtained by molding an appropriate metal material, plastic material or wood. For example, a cylindrical can 13 is manufactured by processing a drum of an appropriate size having an internal volume of about 20,000 cc (20 liters), and a toilet seat 14 made of an appropriate plate material is placed on the cylindrical portion 13. Can be obtained. For example, an appropriate waterproof disposable toilet bag or the like can be placed inside the toilet bowl 12.

  The cleaning water container 18 is a container for storing cleaning water. For example, an appropriately sized plastic bottle having an internal volume of about 2,000 cc can be used. The washing water container 18 is detachably attached to the toilet bowl 12 using an appropriate attachment. The washing water container 18 has an openable / closable lid, and when necessary, the lid can be removed to replenish the washing water. Further, it is preferable to provide an appropriate air communication hole so that the inside of the washing water container 18 is at atmospheric pressure. In addition, since the height of the toilet tank 12 is only about 50 cm as described above, and the washing water jet nozzle 20 is disposed at a considerably high position in the toilet tank 12, the washing water container 18 with respect to the washing water jet nozzle 20 is disposed. There is little or no head pressure in the wash water inside. Even in this case, pressurized water can be supplied to the washing water jet nozzle 20 by the function of the pump mechanism 30 described later.

  The washing water jet nozzle 20 narrows the flow path at the tip of the long and narrow pipe, and causes the pressurized water to flow through the pipe, thereby jetting a thin water flow having a high flow velocity from the tip. For example, the tip of a metal tube having a diameter of about 5 mm and an inner diameter of about 3 mm to about 4 mm can be crushed so that the size of the tip opening is about 1 mm to about 2 mm in diameter. As the metal tube, for example, stainless steel or copper can be used.

  FIG. 2 is a front view for explaining a more detailed configuration of the portable toilet 10 with a sanitary washing device. However, the peripheral part of the washing water jet nozzle 20 is shown as a partially broken view. As shown in FIG. 2, the cleaning water container 18 and the pump mechanism 30 are connected by a flexible container side tube 22, and the cleaning water ejection nozzle 20 and the pump mechanism 30 are flexible nozzle side tube 24. Connected by. As the container side tube 22 and the nozzle side tube 24, for example, a plastic tube having an appropriate thickness can be used.

  The manual operation lever 16 is, for example, a bar member that can swing and rotate around a rotating part 15 provided in the toilet seat 14, and is pumped at a connection part 35 between the grip part for operation and the rotating part 15 and the rotating part 15. One end of the piston shaft 36 of the mechanism 30 is rotatably connected. Accordingly, the piston shaft 36 can be moved in the axial direction by pushing down or pulling up the manual operation lever 16. Therefore, the manual operation lever 16, the rotation part 15, and the connection part 35 comprise a piston moving mechanism.

  Further, a connecting portion 17 to which the rear end portion of the washing water jet nozzle 20 is connected is provided at the tip portion of the manual operation lever 16 opposite to the grip portion. Accordingly, the position of the washing water ejection nozzle 20 can be moved by pushing down or pulling up the manual operation lever 16. For example, normally, the position of the washing water ejection nozzle 20 is set to the retracted position, that is, the position near the inner wall of the cylindrical portion 13 and is moved to the vicinity of the central portion of the cylindrical portion 13 when necessary, and the position is ejected from the cleaning water. It can be a position. Therefore, the manual operation lever 16, the rotation part 15, and the connection part 17 with the washing water ejection nozzle 20 constitute a nozzle moving mechanism.

  Thus, by connecting the piston shaft 36 and the washing water jet nozzle 20 to the manual operation lever 16 to constitute the piston moving mechanism and the nozzle moving mechanism, the piston shaft can be operated by one operation of the manual operation lever 16. 36 and the washing water ejection nozzle 20 can be moved in conjunction with each other. In addition, you may comprise a piston moving mechanism and a nozzle moving mechanism using mechanisms other than the structure demonstrated above. For example, the piston shaft 36 and the washing water jet nozzle 20 may be moved in conjunction with each other using an appropriate link mechanism or the like. As the mechanical parts such as the manual operation lever 16, a material obtained by molding an appropriate metal material or plastic material into a predetermined shape can be used.

  FIG. 3 is a cross-sectional view showing the configuration of the pump mechanism 30. The pump mechanism 30 includes a cylinder 32, a piston 50 that is slidable in the cylinder 32 and includes a piston check valve 60, and a piston shaft 36 that is fixed to the piston 50.

  The cylinder 32 includes a cylindrical tube portion 33 having an opening on one side, and a lid portion 34 that closes the opening of the tube portion 33, and the tube portion 33 and the lid portion 34 do not leak cleaning water. Further, it is firmly fixed using an appropriate seal member. Accordingly, the cylinder 32 has two support holes for supporting the piston shaft 36, a cleaning water inlet 37 connected to the cleaning water container 18, and a cleaning water jet when the cylindrical portion 33 and the lid portion 34 are fixed. Except for the cleaning water outlet 39 connected to the nozzle 20, it has a cylindrical internal space sealed so that the cleaning water does not leak outside. Note that the cylindrical inner wall surface of the cylinder portion 33 of the cylinder 32 is a surface on which the outer periphery of the piston 50 slides, so that the surface is smoothly processed.

  The piston 50 has a substantially disk shape, and a piston shaft 36 is fixed at the center thereof. The disk-shaped outer peripheral surface is smoothly machined, and its outer diameter is set slightly smaller than the inner diameter of the sliding surface of the inner wall in the cylindrical sealed internal space of the cylinder 32. The piston 50 fixed to the piston shaft 36 is inserted with one end of the piston shaft 36 into the piston shaft support hole of the cylindrical portion 33 before the cylinder 32 is assembled. The piston 50 is placed inside the cylinder 32 by fitting into the inner wall surface, inserting the other end of the piston shaft 36 into the piston shaft support hole of the lid portion 34, and firmly fixing the lid portion 34 to the cylinder portion 33. .

  By disposing the piston 50 in the cylinder 32, the internal space of the cylinder 32 is divided into two pressure chambers before and after the piston 50. Distinguishing these two pressure chambers, the one connected to the washing water container 18 side via the washing water inlet 37 is connected to the washing water jet nozzle 20 side via the container pressure chamber 42 and the washing water outlet 39. This will be referred to as a nozzle side pressure chamber 44.

  A container side check valve 38 is provided between the cleaning water inlet 37 of the cylinder 32 and the container side tube 22. The container-side check valve 38 is a check valve having a function of preventing the backflow of the cleaning water from the container-side pressure chamber 42 to the cleaning water container 18. That is, when the pressure in the container side pressure chamber 42 is lower than the pressure in the cleaning water container 18, the check valve opens and the cleaning water can flow from the cleaning water container 18 into the container side pressure chamber 42. When the pressure of 42 is higher than the pressure of the cleaning water container 18, the check valve is closed and the cleaning water cannot flow into the cleaning water container 18 from the container side pressure chamber 42. As such a container-side check valve, a check valve generally used in a water pipe or the like can be used.

  A nozzle-side check valve 40 is provided between the nozzle-side tube 24 and the cleaning water outlet 39 of the cylinder 32. The nozzle-side check valve 40 is a check valve having a function of preventing atmospheric pressure from communicating with the nozzle-side pressure chamber 44 from the washing water ejection nozzle 20 that is opened to atmospheric pressure. That is, when the pressure in the nozzle side pressure chamber 44 is higher than the pressure of the washing water jet nozzle 20, that is, atmospheric pressure, the check valve is opened, and pressurized water can be supplied from the nozzle side pressure chamber 44 to the washing water jet nozzle 20. However, when the pressure in the nozzle side pressure chamber 44 is lower than the atmospheric pressure that is the pressure of the washing water jet nozzle 20, the check valve is closed and the nozzle side pressure chamber 44 is shut off from the atmospheric pressure of the washing water jet nozzle 20. .

  The configuration of the piston 50 will be described with reference to FIGS. 4 and 5. FIG. 4 is an enlarged view of the main part of the piston 50 shown as part A in FIG. FIG. 5 is a cross-sectional side view taken along line BB in FIG.

  The piston 50 includes a piston main body 52 and a piston check valve 60. The piston main body 52 is a disc having a center hole into which the piston shaft 36 is inserted at the center, and has a stepped through screw hole 58 for arranging the piston check valve 60. A plurality of stepped through screw holes 58 are arranged at equal intervals on the same radius from the center hole of the piston main body 52 as shown as a washing water communication hole 74 and a positioning screw 68 in FIG. In the example of FIG. 5, the three stepped through screw holes 58 are arranged, but other numbers may be used. The movement of the piston 50 in the axial direction is fixed with respect to the piston shaft 36 by appropriate retaining rings 54 and 55. Further, when the piston 50 slides on the inner wall surface of the cylindrical portion 33, an appropriate seal member 56 is provided on the outer peripheral surface of the piston 50 so that the pressure chambers on both sides of the piston 50 do not fluidly communicate with each other. Be placed. As the seal member 56, an appropriate seal ring or the like can be used.

  The piston check valve 60 communicates between the container-side pressure chamber 42 and the nozzle-side pressure chamber 44 when the pressure in the container-side pressure chamber 42 is higher than the pressure in the nozzle-side pressure chamber 44. When the pressure is lower than the pressure in the nozzle side pressure chamber 44, the check valve has a function of blocking between the nozzle side pressure chamber 44 and the container side pressure chamber 42. The piston check valve 60 is arranged at three places as described above using the stepped through screw hole 58 of the piston main body 52.

  The piston check valve 60 includes a valve body 62 composed of a head portion having a large outer diameter and a shaft portion having a small outer diameter, a push plate 64 that contacts the shaft portion of the valve body 62, and a head portion of the valve body 62. The urging spring 66 that urges the valve body 62 toward the container-side pressure chamber 42 and the positioning screw 68 for fixing the position of the other end of the urging spring 66 are configured.

  As shown in FIG. 3, the valve body 62 has a head portion facing the nozzle side pressure chamber 44 and a shaft portion facing the container side pressure chamber 42, and a step between the head portion and the shaft portion is stepped. It is supported by the stepped portion of the through screw hole 58. Further, in the neutral state, the shaft portion of the valve body 62 protrudes from the stepped through screw hole 58, and the tip end of the shaft portion contacts the one surface of the pressing plate 64 as described above. As the valve body 62, a stepped check valve body used for metal or plastic water pipes or the like can be used.

  The push plate 64 is a disc having substantially the same outer diameter as the piston main body 52, and has a function of transmitting the pressure in the container side pressure chamber 42 to the valve body 62. As shown in FIG. 5, the push plate 64 has a plurality of cleaning water communication holes 72. Thereby, the washing water of the container side pressure chamber 42 can flow to the piston check valve 60 side of the piston main body 52 without being blocked by the push plate 64. In FIG. 5, twelve cleaning water communication holes 72 are shown, but the number may be other than this.

  Further, the push plate 64 is restricted from moving toward the container-side pressure chamber 42 with respect to the piston shaft 36 by an appropriate retaining ring 70. The retaining ring 70 is provided only on one side of the push plate 64 on the container side pressure chamber side. Accordingly, the push plate 64 can freely move to the nozzle side pressure chamber 44 side. Accordingly, when the pressure in the container side pressure chamber 42 is appropriately higher than that in the nozzle side pressure chamber 44, the push plate 64 moves along the axial direction of the piston shaft 36, and the valve body 62 is moved to the nozzle side pressure chamber 44 side. Can be pressed.

  The biasing spring 66 presses the valve body 62 against the container-side pressure chamber 42 with an appropriate pressing force, and a differential pressure that is a pressure difference between the pressure in the container-side pressure chamber and the pressure in the nozzle-side pressure chamber; The valve body 62 has a function of opening and closing the piston check valve 60 by separating or closely contacting the valve body 62 with the balance of the pressing force. The biasing spring 66 is disposed between the head of the valve body 62 and the positioning screw 68. Therefore, the pressing force of the urging spring 66 can be adjusted by adjusting the screwing amount of the positioning screw 68 into the stepped through screw hole 58. As the urging spring 66, a suitable coil spring through which washing water can flow can be used.

  The positioning screw 68 is a screw that is screwed into the threaded portion of the stepped through screw hole 58 and has a function of adjusting the pressing force of the biasing spring 66 as described above. The positioning screw 68 is provided with a cleaning water communication hole 74 at the center thereof. Thereby, when the piston check valve 60 is opened, the washing water can flow from the container side pressure chamber 42 to the nozzle side pressure chamber 44.

  The operation of the portable toilet 10 with the sanitary washing device having the above configuration will be described with reference to FIGS. FIGS. 6 to 8 are views showing the state of each element of the pump mechanism 30 when the piston shaft 36 is in the neutral position, the retracted position, and the pushed position by the operation of the manual operation lever 16, respectively. In these drawings, the elements in the pump mechanism 30 are schematically shown with a focus on what is necessary for the description of the action, and are omitted from FIGS. 3 and 4.

  FIG. 6 is a diagram illustrating a state of the pump mechanism 30 when the piston shaft 36 is in a neutral state, and corresponds to a state where the portable toilet 10 with a sanitary washing device is not used. As shown in FIG. 6, the piston 50 is located at a substantially intermediate position in the axial direction of the cylinder 32, and both the container-side pressure chamber 42 and the nozzle-side pressure chamber 44 are filled with cleaning water.

  The initial state of the portable toilet 10 with a sanitary washing device is, of course, that the washing water has not yet been introduced into the cylinder 32, and both the container-side pressure chamber 42 and the nozzle-side pressure chamber 44 remain at atmospheric pressure. By operating the manual operation lever 16 to reciprocate the piston shaft 36 between the pull back position described in FIG. 7 and the push position described in FIG. Introduced and can be in the state of FIG. Of course, the portable toilet 10 with a sanitary washing device may be left in the retracted position described in FIG. 7 or the pushed position described in FIG. The state will be described with reference to FIGS. 7 and 8, respectively. In general, the state immediately before the portable toilet 10 with the sanitary washing device is used is assumed to be in the neutral position in FIG. it can.

  7 and 8 are views for explaining the position of the piston shaft 36 by the operation of the manual operation lever 16 and the state of each element associated therewith when using the portable toilet 10 with the sanitary washing device. When the portable toilet 10 with a sanitary washing device is used, the piston shaft 36 is moved from the neutral state to the retracted position as shown in FIG. 7 as the first stage, and the piston shaft as shown in FIG. 8 as the second stage. 36 is changed from the retracted position to the pushed position.

  FIG. 7 is a view showing a state where the piston shaft 36 is moved from the neutral state to the retracted position. Here, the retracted position refers to a position where the piston shaft 36 is moved toward the container-side pressure chamber 42. In this state, the piston 50 moves toward the container side pressure chamber 42. As a result, the volume of the container side pressure chamber 42 decreases and the volume of the nozzle side pressure chamber 44 increases, so that the pressure of the container side pressure chamber 42 becomes relatively higher than the pressure of the nozzle side pressure chamber 44. Therefore, the piston check valve 60 opens when the push plate 64 moves toward the nozzle-side pressure chamber 44 and pushes the valve body. On the other hand, the container-side check valve 38 is closed when the pressure in the container-side pressure chamber 42 is increased, and the nozzle-side check valve 40 is closed when the pressure in the nozzle-side pressure chamber 44 is reduced. That is, the internal space of the cylinder 32 is blocked from the outside.

  Accordingly, the states of the cleaning water container 18 and the cleaning water ejection nozzle 20 are not changed, and the cleaning water moves inside the cylinder 32. That is, the wash water that has been in the container-side pressure chamber 42 in the neutral state passes through the opened piston check valve 60 and moves to the nozzle-side pressure chamber. As a result, sufficient washing water is supplied into the nozzle-side pressure chamber 44 having a large volume.

  FIG. 8 is a view showing a state where the piston shaft 36 is moved from the retracted position to the pushed position. Here, the pushing position refers to a position where the piston shaft 36 is moved toward the nozzle side pressure chamber 44. In this state, the piston 50 moves toward the nozzle side pressure chamber 44. As a result, the volume of the nozzle side pressure chamber 44 decreases and the volume of the container side pressure chamber 42 increases, so that the pressure in the container side pressure chamber 42 becomes relatively lower than the pressure in the nozzle side pressure chamber 44. From a viewpoint, the pressure in the nozzle side pressure chamber 44 is higher than the pressure in the container side pressure chamber 42. Therefore, the piston check valve 60 is closed. On the other hand, the container-side check valve 38 opens when the pressure in the container-side pressure chamber 42 decreases, and the nozzle-side check valve 40 opens when the pressure in the nozzle-side pressure chamber 44 increases. That is, the internal space of the cylinder 32 communicates with the outside.

  Accordingly, in the container side pressure chamber 42, the cleaning water flows into the container side pressure chamber 42 from the cleaning water container 18 by opening the container side check valve 38. However, since the piston check valve 60 is closed, the flowing cleaning water does not flow into the nozzle-side pressure chamber 44. As a result, the container-side pressure chamber 42 having a large volume is filled with a sufficient amount of washing water.

  On the other hand, in the nozzle side pressure chamber 44, since the piston check valve 60 is closed, the wash water is pressurized as the volume of the nozzle side pressure chamber 44 decreases. The pressurized wash water is supplied to the wash water jet nozzle 20 through the open nozzle side check valve 40. By flowing this pressurized washing water through the thin nozzle side tube, even if the nozzle side check valve 40 is opened, the nozzle side pressure chamber 44 is not opened to atmospheric pressure. As a result, pressurized wash water is supplied to the wash water jet nozzle 20, and the flow velocity is accelerated by the narrowed opening at the tip of the wash water jet nozzle 20, so that wash water can be jetted.

  Thus, in the pushing position, the piston check valve 60 is closed and the container side check valve 38 is opened, so that the cleaning water is introduced from the cleaning water container 18 into the container side pressure chamber 42. On the other hand, while the piston check valve 40 is closed and the nozzle check valve 40 is opened, the wash water pressurized to the wash water jet nozzle 20 while pressurizing the wash water in the nozzle side pressure chamber 44. Can supply. That is, at the pushing position, these two actions are performed in parallel.

  Thus, when the piston check valve is opened by the operation of the manual operation lever, the container side check valve and the nozzle side check valve are closed, and when the piston check valve is closed, the container side check valve and the nozzle side are closed. By operating the check valve to open, it can be used with a simple structure, without using pressurized city water, using an electric pump or special flow control valve, etc., while using a manual pump mechanism. Wash water can be ejected in the toilet bowl.

  In a portable toilet with a sanitary washing device, a pressurizing source for ejecting washing water is required to make the sanitary washing device portable. In the above configuration, the action of the check valve and the piston / cylinder mechanism are combined to pressurize the water used for cleaning. Therefore, a special external drive source for pressurizing the cleaning water, such as an electric motor such as a motor, is used. Does not require a drive source. Moreover, although the said structure uses the mechanism, the means to accumulate | store mechanical energy, such as a mainspring, is not required. Thus, according to the said structure, an electric drive source, such as a motor, is not required, and mechanical energy storage means, such as a mainspring, is not required, and a sanitary washing apparatus can be made portable.

In embodiment which concerns on this invention, it is a perspective view which shows the structure of the portable toilet bowl with a sanitary washing apparatus. In embodiment which concerns on this invention, it is a front view for demonstrating the further detailed structure of the portable toilet bowl with a sanitary washing apparatus. In embodiment which concerns on this invention, it is sectional drawing which shows the structure of a pump mechanism. It is an enlarged view of the principal part of the piston shown as A part in FIG. FIG. 5 is a cross-sectional side view taken along the line indicated as line BB in FIG. 3. In embodiment which concerns on this invention, it is a figure which shows the mode of each element of a pump mechanism when a piston shaft exists in a neutral position. In embodiment which concerns on this invention, it is a figure which shows the mode of each element of a pump mechanism when a piston shaft exists in a retracted position. In embodiment which concerns on this invention, it is a figure which shows the mode of each element of a pump mechanism when a piston shaft exists in a pushing position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Portable toilet with sanitary washing device, 12 Toilet tank, 13 (toilet tank) cylinder part, 14 Toilet seat, 15 Rotating part, 16 Manual operation lever, 17, 35 Connection part, 18 Wash water container, 20 Wash water jet nozzle , 22 Container side tube, 24 Nozzle side tube, 30 Pump mechanism, 32 Cylinder, 33 (Cylinder) cylinder part, 34 Lid part, 36 Piston shaft, 37 Washing water inlet, 38 Container side check valve, 39 Washing water outlet , 40 Nozzle side check valve, 42 Container side pressure chamber, 44 Nozzle side pressure chamber, 50 piston, 52 Piston body, 54, 55, 70 Retaining ring, 56 Seal member, 58 Stepped through screw hole, 60 Piston reverse Stop valve, 62 Valve body, 64 Press plate, 66 Biasing spring, 68 Positioning screw, 72, 74 Washing water communication hole.

Claims (2)

A washing water ejection nozzle attached to the portable toilet,
A washing water container;
Nozzle-side pressure that is divided into two pressure chambers by a piston that slides in the cylinder, one pressure chamber being connected to the washing water container, and the other pressure chamber being connected to the washing water jet nozzle A pump mechanism that is a chamber;
A container-side check valve that is provided between the washing water container and the container-side pressure chamber, and prevents backflow from the container-side pressure chamber to the washing water container;
A nozzle-side check valve that is provided between the washing water ejection nozzle and the nozzle-side pressure chamber and prevents atmospheric pressure from communicating from the washing water ejection nozzle that is opened to atmospheric pressure to the nozzle-side pressure chamber;
A piston check valve provided in the piston, wherein when the pressure in the container-side pressure chamber is higher than the pressure in the nozzle-side pressure chamber, the container-side pressure chamber communicates with the nozzle-side pressure chamber, A piston check valve that shuts off between the nozzle side pressure chamber and the container side pressure chamber when the pressure is lower than the pressure in the nozzle side pressure chamber;
A piston moving mechanism for moving the piston relative to the cylinder by operating the manual operation lever;
Have
The piston moving mechanism
By moving the piston from the nozzle side pressure chamber side toward the container side pressure chamber side, the pressure in the container side pressure chamber is made higher than the pressure in the nozzle side pressure chamber, and the piston check valve is connected and The stop valve and the nozzle check valve are closed, and the cleaning water in the container pressure chamber is supplied to the nozzle pressure chamber,
By moving the piston from the container side pressure chamber side toward the nozzle side pressure chamber side, the pressure in the container side pressure chamber is made lower than the pressure in the nozzle side pressure chamber to shut off the piston check valve and reverse the container side pressure chamber. Open the stop valve and the nozzle side check valve to introduce cleaning water from the cleaning water container into the container side pressure chamber, pressurize the cleaning water in the nozzle side pressure chamber and supply it to the cleaning water jet nozzle for cleaning A portable toilet with a sanitary washing device characterized by jetting water. The portable toilet with a sanitary washing device according to claim 1,
A portable toilet with a sanitary washing device, characterized in that it has a nozzle moving mechanism that is connected to a piston moving mechanism and moves a washing water ejection nozzle in conjunction with the movement of the piston.

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