JP6421914B2 - Flush toilet equipment - Google Patents

Description

The present invention relates to a flush toilet apparatus for washing a toilet body with flush water.

  2. Description of the Related Art Conventionally, flush toilet apparatus using a tank type or direct pressure type water supply mechanism has been widely used as a mechanism for supplying flush water to a toilet body.

The tank-type water supply mechanism stores water in advance in a tank and supplies the water as flush water to the toilet body. In such a tank-type water supply mechanism, since it is necessary to store all of the water supplied as cleaning water in the tank, there was a problem that the tank mounted on the flush toilet device would be enlarged. .

  In addition, after the toilet bowl is cleaned, it is necessary to keep the tank full for the next cleaning, but it takes time to fill the large tank with water. . For this reason, it is difficult for the tank-type water supply mechanism to perform continuous cleaning (every short time), and there is a problem that the flush toilet apparatus is not suitable for a situation where the flush toilet apparatus is frequently used.

  The direct pressure type water supply mechanism supplies cleaning water from the water supply pipe to the toilet body using water pressure in the water supply pipe (water pipe) arranged in the building. In such a direct pressure type water supply mechanism, since the flow rate of the washing water depends on the water pressure in the water supply pipe, when the flush toilet apparatus is installed in an environment where the water pressure is low (for example, a high floor), There existed a subject that performance fell. Moreover, in order to be able to supply a large flow rate of water by the direct pressure type water supply mechanism, it is necessary to make the water supply pipe connected to the flush toilet device have a large diameter. For this reason, there was a problem of requiring large-scale construction.

  A jet pump type water supply mechanism has been newly proposed as a water supply mechanism that can simultaneously solve both of the problems in the tank type water supply mechanism and the problems in the direct pressure type water supply mechanism (the following patents). Reference 1).

  The jet pump type water supply mechanism described in Patent Document 1 below includes a tank storing water, and the jet pump unit is disposed in the tank while being submerged. The jet pump unit has a throat pipe. One end of the throat pipe is connected to a flow path toward the bowl portion of the toilet body, and an opening is formed at the other end. When water is sprayed from the spray nozzle to the inside of the throat pipe through the opening, a jet pump action is induced, so that a large flow of water flows toward the bowl portion inside the throat pipe. Since not only the water sprayed from the spray nozzle but also the water stored in the tank is drawn and flows through the throat pipe, a large amount of flush water is supplied to the toilet body.

In the jet pump type water supply mechanism, it is not necessary to store all the water supplied to the toilet body as cleaning water in the tank. For this reason, compared with a tank-type water supply mechanism, there is an advantage that the tank can be miniaturized and the time required for filling the tank to the full water level can be shortened. Moreover, even if the flush toilet apparatus is installed in an environment where the water pressure in the water supply pipe is relatively low, a large flow of flush water can be supplied to the toilet body. Furthermore, there is an advantage that a large-scale construction that makes the water supply pipe large in diameter is not required.

JP 2004-156382 A

  As described above, the flush toilet apparatus described in Patent Document 1 needs to store all of the water supplied to the toilet body as wash water in the tank by using a jet pump type water supply mechanism. The tank can be downsized and the jet pump action can be used to supply a large flow of water to the toilet body. When forming a tubular tube, a draft angle is generated in the throat tube for removing the throat tube and a mold used for forming the tube. When a throat pipe with such draft is used, the flow rate of water sprayed from the nozzle toward the inside of the throat pipe is high, so the water passing through the throat pipe also becomes high, and the throat pipe Water and the inner wall of the throat pipe are peeled off due to the draft angle generated in the throat pipe. If the water and the inner wall of the throat pipe are separated, the air existing inside the throat pipe cannot be discharged before the water in the tank is supplied to the toilet body, and air remains in the throat pipe. Resulting in. When air stays inside the throat pipe, resistance is given to the water supplied by the buoyancy of the air itself staying inside the throat pipe, and the instantaneous flow rate of water supplied to the toilet body decreases. , The positive discharge of filth will decrease.

  The present invention has been made in view of such problems, and the object thereof is to collect air inside the throat pipe even when a throat pipe having a draft angle generated when the throat pipe is formed is used. It is in providing the flush toilet apparatus which can suppress that generation | occurrence | production generate | occur | produces and can prevent that the instantaneous flow volume of the water supplied to a toilet bowl main body falls.

In order to solve the above-mentioned problems, a flush toilet apparatus according to the present invention is a flush toilet apparatus for washing a toilet body with washing water, and has a bowl portion for receiving filth, and is supplied as washing water. A toilet body having a water conduit for guiding the water to be supplied to the bowl portion, a tank for storing water therein, and supplying the water to the inlet of the water conduit; A jet pump unit disposed inside, a throat pipe having one end connected to the inlet of the water conduit and the other end formed with a suction port; and A nozzle that induces a jet pump action by injecting high-speed water toward the inside of the throat pipe, and the throat pipe is bent between the suction port and the inlet of the water conduit Do The bent portion is formed by inserting an interior member into a portion where the flow passage cross-sectional area is enlarged on the downstream side of the bent portion and the flow passage cross-sectional area is enlarged inside the throat pipe. It is characterized by suppressing air accumulation generated further downstream.

  The first invention uses water and the inner wall of the throat pipe by passing through the bent portion when a throat pipe having a draft angle that increases the flow passage cross-sectional area of the throat pipe from the bent portion toward the downstream side is used. If there is a draft angle that peels off and air pools and the cross-sectional area of the flow path expands, the amount of air pools generated on the downstream side of the bend increases, but the interior of the throat pipe By inserting the member, the space where the water separates from the inner wall of the throat pipe can be reduced by the interior member, so that the amount of air pockets generated can be reduced. By reducing the amount of the air pool, the resistance of the water passing through the throat pipe to the air can be reduced, and the decrease in the instantaneous flow rate of the water supplied to the toilet body can be suppressed.

  The interior member of the second invention is characterized in that it vibrates by a water flow passing through the inside of the throat pipe.

  Although the amount of air pool generated inside the throat pipe can be reduced, it is more preferable that there is no air pool inside the throat pipe. Therefore, by making the interior member inserted into the throat pipe vibrate, the interior member vibrates due to the water passing through the interior member, and vibration is generated in the air generated on the downstream side of the bent portion and in the vicinity of the interior member. By applying, air can be peeled off from the wall surface of the interior member, and the air can be discharged by water passing through the inside of the throat pipe. As a result, air can be prevented from staying inside the throat pipe, and a reduction in the instantaneous flow rate of water supplied to the toilet body can be suppressed.

  The throat pipe according to a third aspect of the present invention includes an upstream portion upstream of the bent portion and a downstream portion downstream of the bent portion, and the bent portion includes a first curved surface and the first curved surface. A second curved surface having a curvature smaller than the curvature, and the inner wall is inserted into the first downstream portion when the wall surface on the descending portion side downstream from the first curved surface is the first downstream portion. It is characterized by doing.

  The air pool is generated by the separation of the inner wall of the throat pipe and water on the first curved surface side where the curvature of the bent portion is large, so that the interior member is inserted into the first downstream portion downstream of the first curved surface. The amount of air accumulation can be reduced, and even when air accumulation occurs, the interior member can vibrate so that the air can be separated from the wall surface of the interior member and pass through the throat pipe. The air can be discharged from the throat pipe by water. Therefore, the fall of the instantaneous flow volume of the water supplied to the toilet bowl main body can be suppressed.

  The interior member according to a fourth aspect is characterized in that a vibration space allowing vibration is provided between the throat pipe and the interior member in a state of being inserted into the throat pipe.

If there is no vibration space between the interior member and the throat pipe, and the throat pipe and the interior member are attached in close contact, the interior member will not vibrate unless the force of water passing through the interior member is strong. By virtue of providing a vibration space between the throat pipe and the throat pipe, the interior member can be vibrated with a weaker water force than the water oscillating water when the interior member and the throat pipe are closely attached and fixed. Can do.
Furthermore, immediately after the supply of water from the tank to the toilet body is started, air is present inside the throat pipe, and air is likely to accumulate, and the momentum of water passing through the throat pipe is relatively weak. State. Since the interior member can be vibrated immediately after starting the supply of water to the toilet body from a tank with relatively weak water momentum in this way, it is possible to shorten the time when the instantaneous flow rate due to air accumulation decreases, A large amount of water can be supplied for a long time. Therefore, the fall of the discharge property of the filth of the flush toilet apparatus can also be suppressed.

  The interior member of the fifth invention is characterized in that it is formed in an annular shape.

  Since the interior member vibrates, strength is required, but since the force received from the outside by the interior member can be dispersed by forming it in an annular shape, the strength can be increased without increasing the thickness of the interior member. Therefore, the manufacturing cost can be reduced.

  When the interior member of the sixth invention is inserted into the throat pipe, the inner end of the throat pipe on the other end side of the first end and the first end that is the upstream end of the throat pipe The second end is a downstream side, and the second end has a fixing part for fixing to the throat pipe, and fixes the fixing part and the throat pipe. .

  By fixing the second end portion of the interior member on the downstream side of the throat pipe and the throat pipe, the distance between the vicinity of the bent portion where the air pool is generated and the fixed portion becomes longer. Can be vibrated. Therefore, strong vibration can be imparted to the air generated in the vicinity of the wall surface of the interior member, and air can be discharged from the throat pipe at an early stage after the air pool is generated.

  A flow passage cross-sectional area of the interior member according to the seventh invention is configured to be smaller than a flow passage cross-sectional area of the bent portion.

  By making the flow passage cross-sectional area of the interior member smaller than the flow passage cross-sectional area of the bent portion, by inserting the interior member having a flow passage cross-sectional area smaller than the bent portion into the space where the water separates from the inner wall of the throat pipe, It is possible to further reduce the amount of air pockets generated. By further reducing the amount of the air pool, the resistance of the water passing through the throat pipe to the air can be reduced, and the decrease in the instantaneous flow rate of the water supplied to the toilet body can be suppressed. .

According to the present invention, even when a throat pipe having a draft angle generated when forming the throat pipe is used, the occurrence of air accumulation inside the throat pipe is suppressed and supplied to the toilet body. It is possible to provide a flush toilet apparatus capable of preventing the instantaneous flow rate of water from being lowered.

It is sectional drawing which shows the flush toilet apparatus which concerns on this invention. It is a top view of the flush toilet apparatus shown in FIG. It is a figure which shows the inside of the tank of the flush toilet apparatus shown in FIG. It is a figure explaining the interior member 500 inserted in the throat pipe | tube 320. FIG. FIG. 5 is a diagram showing a process of inserting an interior member 500 into a throat pipe 320. FIG. 4 is a diagram showing the flow of water passing through the inside of a throat pipe 320. FIG. 4 is a diagram showing the flow of water passing through the inside of a throat pipe 320.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A flush toilet apparatus FT according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the flush toilet apparatus FT, showing a cross section when the flush toilet apparatus FT is cut along a plane perpendicular to the left-right direction. FIG. 2 is a top view of the flush toilet apparatus FT. In FIG. 2, in order to show the internal structure of the tank 20 described later, a state in which the upper cover 201 of the tank 20 is removed is illustrated.

  As shown in FIGS. 1 and 2, the flush toilet apparatus FT includes a toilet main body 10 and an upper surface of the toilet main body 10 on the rear side (right side in FIG. 1, upper side in FIG. 2) of the toilet main body 10. The tank 20 installed in 101 is provided. The flush toilet device FT is a device that receives filth by the toilet body 10 and discharges the filth to the drain pipe SW with water (wash water) supplied from the tank 20.

  In the following description, the right side (left side in FIG. 2) viewed from the user seated on the toilet body 10 is referred to as the “right side” and is seated on the toilet body 10 unless otherwise specified. The left side when viewed from the state user is referred to as the “left side” (right side in FIG. 2). Further, the front side (left side in FIG. 1, lower side in FIG. 2) viewed from the user seated on the toilet body 10 is referred to as “front side” or “front side” and is seated on the toilet body 10. The rear side (the right side in FIG. 1 and the upper side in FIG. 2) viewed from the user in this state is referred to as “rear side” or “rear side”.

  The toilet body 10 includes a bowl portion 110, a rim portion 120, a water conduit 130, and a drain trap conduit 140. The bowl part 110 is a part that temporarily receives the filth falling from above. The rim portion 120 is formed on the upper edge portion of the bowl portion 110 and has a shape in which a part of the inner side surface of the bowl portion 110 is retreated toward the outer peripheral side as shown in FIG. Yes. As will be described later, the rim 120 is a flow path in which water supplied toward the bowl 110 is swirled. The rim part 120 is formed as a substantially circular (top view) flow path that goes around the upper edge of the bowl part 110.

  The water conduit 130 is a channel formed inside the toilet body 10 in order to guide the water supplied from the tank 20 to the bowl portion 110. One end of the water conduit 130 opens on the upper surface 101 of the toilet body 10, and serves as an inlet 131 for water supplied from the tank 20. The position where the inlet 131 is formed is a rear portion of the upper surface 101 of the toilet body 10 and a central portion in the left-right direction.

  The water conduit 130 is branched into two flow paths (a first water conduit 132 and a second water conduit 134) on the downstream side thereof. The downstream end of the first water conduit 132 that is one of the channels opens at the right side of the rim portion 120, and the opening serves as a water outlet (water discharge portion 133). When water is supplied from the tank 20 to the inlet 131, a part of the water passes through the inside of the first water conduit 132 and is ejected from the water discharge part 133 and supplied to the rim part 120.

  The second water conduit 134, which is the other channel, is open at the downstream end of the rim portion 120 on the left side and the rear side, and the opening serves as a water outlet (water discharge portion 135). ing. When water is supplied from the tank 20 to the inlet 131, a part of the water passes through the inside of the second water conduit 134 and is ejected from the water discharge portion 135 and supplied to the rim portion 120.

The direction in which water is ejected from the water discharger 133 is a direction along the circumference of the rim 120 formed as a substantially circular flow path, and is a counterclockwise direction when viewed from above. The direction in which water is ejected from the water discharger 135 is also a direction along the circumference of the rim 120 formed as a substantially circular flow path, and is also a counterclockwise direction when viewed from above. As indicated by arrows in FIG. 2, the water spouted from the water discharger 133 and the water discharger 135 to the rim part 120 flows while swirling counterclockwise along the rim part 120, and the entire rim part 120. Then flows down toward the bowl 110.

  The drain trap pipe 140 is a flow path that connects the lower end of the bowl part 110 and the drain pipe SW. The drain trap pipe 140 has an ascending channel 141 formed so as to rise upward along the direction from the lower end of the bowl portion 110 toward the downstream, and along the direction from the upper end of the ascending channel 141 toward the downstream. And a descending flow path 142 formed to have a downward slope. With such a configuration, water can be stored in a portion extending from the lower part of the bowl part 110 to the lower part of the ascending flow path 141, and the sealed water WT is formed by the stored water. A drain pipe SW is connected to the lower end of the descending flow path 142. The drain pipe SW is a pipe arranged inside the building, and its downstream end is connected to a sewer pipe (not shown).

When water is supplied from the tank 20 toward the bowl portion 110, the water flows down from the entire rim portion 120 toward the bowl portion 110 while swirling and flowing through the rim portion 120 as described above. Water is added to the bowl part 110 from above, and is discharged from the lower end part of the bowl part 110 through the ascending channel 141 and the descending channel 142. As a result, a downward flow occurs in the water (sealed water WT) stored in the bowl portion 110.

  The filth that has been temporarily received in the bowl portion 110 is pushed downward by the water supplied from the upper rim portion 120 and moves toward the lower end of the bowl portion 110. Thereafter, the filth passes through the ascending channel 141 and reaches the descending channel 142 by the water flow, and falls together with the water toward the drain pipe SW.

  The tank 20 is a container in which water is stored, and supplies the water to the inlet 131 of the water conduit 130. The tank 20 includes a first tank part 210 and a second tank part 220 formed so as to extend a part of the bottom wall 211 of the first tank part 210 downward. The first tank part 210 and the second tank part 220 are both substantially rectangular parallelepiped containers, and their internal spaces communicate with each other. The second tank portion 220 is connected to a rear portion of the bottom wall 211 of the first tank portion 210.

  The bottom wall 211 of the first tank part 210 (the part on the front side of the second tank part 220) is in a state of being close to the part on the rear side of the upper surface 101 of the toilet body 10 from above. Specifically, an inlet 131 is formed in a rear side portion of the upper surface 101 of the toilet body 10, but the bottom wall 211 of the first tank unit 210 covers the periphery of the inlet 131 from above. The upper surface 101 of the toilet body 10 is close to the upper surface 101 from above. In addition, an opening 212 having substantially the same shape as the inlet 131 is formed in the bottom wall 211, and the opening 212 and the inlet 131 overlap in a top view. For this reason, the water stored in the tank 20 can flow into the water conduit 130 through the opening 212 and the inlet 131 and flow toward the bowl portion 110.

  As a result of arranging the first tank part 210 as described above, the second tank part 220 is located behind the toilet body 10. That is, it is in a state of being located further rearward than the rear end of the toilet body 10. Further, the bottom wall 221 of the second tank unit 220 is disposed at a position lower than the upper surface 101 of the toilet body 10.

  By arranging the tank 20 as described above, the front end portion of the tank 20 is positioned on the front side of the rear end portion of the toilet body 10. Further, the lower end portion of the tank 20 is located below the upper surface 101 of the toilet body 10. As a result, the dimension in the front-rear direction and the dimension in the vertical direction of the entire flush toilet apparatus FT are both small, and the design of the flush toilet apparatus FT is improved.

  Next, the internal configuration of the tank 20 will be described. FIG. 3 is a perspective view showing the inside of the tank 20 when the flush toilet apparatus FT is viewed from the rear side. As shown in FIG. 3, a water supply pipe 231, a main valve 233, a pilot valve 234, and a jet pump unit 300 are disposed inside the tank 20.

  The water supply pipe 231 is a pipe for supplying water toward the main valve 233, and is arranged to extend vertically upward from the bottom wall 221 of the second tank portion 220. The lower end of the water supply pipe 231 is connected to a water pipe (not shown) outside the tank 20. The upper end of the water supply pipe 231 is connected to the main valve 233 from below in the tank 20. The water supply pipe 231 is disposed in the tank 20 at a position on the left side of the center in the left-right direction.

  A constant flow valve 232 (not shown in FIG. 3) is arranged in the middle of the water supply pipe 231 (between the water pipe and the main valve 233). When the main valve 233 is opened, the flow rate of water flowing into the main valve 233 is constant by the constant flow valve 232, and does not fluctuate due to the water pressure in the water pipe.

  The main valve 233 is an open / close valve that opens and closes the water flow path from the water supply pipe 231 to the jet pump unit 300. A vacuum breaker 235 is provided between the main valve 233 and the jet pump unit 300, and the upstream side of the vacuum breaker 235 is prevented from being negatively pressured to prevent water from flowing backward. As described above, the water supply pipe 231 extends upward, and the main valve 233 and the vacuum breaker 235 are arranged at a high position in the tank 20. For this reason, the vacuum breaker 235 will not be submerged even when the water level of the tank 20 is full.

  The main valve 233 is provided with a pilot valve 234, and the operation of the pilot valve 234 is configured to switch between opening and closing of the main valve 233. A manual lever 236 disposed outside the tank 20 is connected to the pilot valve 234 via a transmission mechanism 237 disposed inside the tank 20. Further, a float 238 disposed inside the tank 20 is further connected to the pilot valve 234.

  When the manual lever 236 is operated by the user of the flush toilet apparatus FT, the operation is transmitted to the pilot valve 234 via the transmission mechanism 237, and the pilot valve 234 is opened. As a result, the main valve 233 is opened, and water flows from the water supply pipe 231 toward the jet pump unit 300. As will be described later, the water flowing toward the jet pump unit 300 is supplied to the water conduit 130 as cleaning water together with the water stored in the tank 20. For this reason, the water level inside the tank 20 gradually decreases.

  Even after the cleaning of the bowl part 110 is completed, the main valve 233 is not closed, and water continues to flow from the water supply pipe 231 toward the jet pump unit 300. The water that flows toward the jet pump unit 300 is supplied into the tank 20 and stored for the next cleaning. When water is supplied to the inside of the tank 20 (water injection into the tank 20), the water level inside the tank 20 gradually rises. The float 238 connected to the pilot valve 234 inside the tank 20 rises as the water level rises, whereby the pilot valve 234 is closed.

  Thus, when the water level inside the tank 20 rises, the pilot valve 234 is closed by the change in buoyancy that the float 238 receives. When the pilot valve 234 is closed, the main valve 233 is closed, and the supply of water from the water supply pipe 231 to the jet pump unit 300 is stopped. At this time, the arrangement of the float 238 is adjusted so that the amount of water stored in the tank 20 becomes a necessary amount for the next cleaning (so as to reach a predetermined full water level). .

  The jet pump unit 300 is for inducing a jet pump action by the water supplied from the water supply pipe 231 and thereby supplying water toward the water conduit 130. The jet pump unit 300 includes a nozzle 310 and a throat pipe 320.

  The nozzle 310 is a tube having one end connected to the vacuum breaker 235 via a connecting tube 239 and the other end formed with an injection port 311. The nozzle 310 is disposed in the vicinity of the bottom wall 221 of the second tank unit 220. When the main valve 233 is opened, the water supplied from the water supply pipe 231 flows through the connection pipe 239, reaches the nozzle 310, and is injected from the injection port 311 as a high-speed water flow. The nozzle 310 is disposed at the rear side and right corner (corner in top view) of the second tank portion 220. As shown in FIG. 3, the nozzle 310 is U-shaped, and its downstream side is folded from the corner. The injection port 311 has an injection direction directed toward the inside of the throat pipe 320.

  The throat pipe 320 is a pipe having a circular cross section, and is disposed inside the tank 20 with a part thereof passing through an opening 212 formed in the bottom wall 211. One end of the throat pipe 320 is connected to the inlet 131 of the water conduit 130, and a suction port 321 that is an opening is formed at the other end. In the throat pipe 320, a portion on the inlet 131 side of the water conduit 130 is along the vertical direction, and a portion on the suction port 321 side is inclined with respect to the horizontal plane. For this reason, the whole becomes an inverted U shape. As shown in FIG. 2, the throat pipe 320 is disposed inside the tank 20 in a state inclined with respect to the front-rear direction in a top view.

  The specific shape of the throat pipe 320 will be described in more detail. The throat pipe 320 is disposed on the rising portion 322 extending obliquely upward from the suction port 321, the bent portion 323 disposed on the downstream side (upper side) of the rising portion 322, and the downstream side (lower side) of the bent portion 323. And a descending portion 324 extending downward from the bent portion 323.

  The ascending portion 322 is a cylindrical tube having a uniform tube diameter as a whole, and is disposed in an inclined state with respect to the horizontal plane. The suction port 321 is formed at the lower end of the rising portion 322. The suction port 321 is formed so that the entire edge is along a horizontal plane (in parallel with the horizontal plane).

  The descending portion 324 is a cylindrical tube having a uniform tube diameter as a whole, and is disposed along the vertical direction. The tube diameter of the descending part 324 is larger than the tube diameter of the ascending part 322. The tube diameter on the rising portion 322 side of the bent portion 323 is equal to the tube diameter of the rising portion 322. Further, the tube diameter of the bent portion 323 on the descending portion 324 side is equal to the tube diameter of the descending portion 324. For this reason, it can be said that the ascending portion 322 and the descending portion 324 having different tube diameters are smoothly connected by the bent portion 323.

  Next, the interior member 500 inserted into the throat pipe 320 will be described. FIG. 4 is a view for explaining the interior member 500 to be inserted into the throat pipe 320. FIG. 4 a is a top view of the interior member 500. FIG. 4 b is a side view of the interior member 500.

  As shown in FIGS. 4 a and 4 b, the interior member 500 is formed in an annular shape and includes a fixing portion 530 for fixing the interior member 500 and the throat pipe 320. The interior member 500 has a second end portion 520 that is an end portion of the interior member 500 provided with the fixing portion 530 and a first end portion 510 that is the opposite end side of the second end portion 520.

  A process of inserting the interior member 500 into the throat pipe 320 will be described with reference to FIG. FIG. 5 a is a diagram illustrating a process of inserting the interior member 500 into the throat pipe 320. FIG. 5 b is a diagram illustrating a state in which the interior member 500 is fixed to the throat pipe 320.

  The bent portion 323 of the throat pipe 320 has a first curved surface 325 having a large curvature and a second curved surface 326 having a smaller curvature than the first curved surface 325. The descending portion 324 has a wall surface of the descending portion 324 downstream of the first curved surface 325 as a first downstream portion 327 and a wall surface of the descending portion 324 downstream of the second curved surface 326 as a second downstream portion 328. . As shown in FIG. 6 a, the interior member 500 is inserted into the throat pipe 320.

  FIG. 5 b shows a state where the interior member 500 is inserted into the throat pipe 320 and fixed. The interior member 500 is inserted into the throat pipe 320, and the fixing part 530 provided at the second end 520 and the throat pipe 320 are fixed using screws or the like.

  The process of the flow of water passing through the throat pipe 320 will be described with reference to FIGS.

  When the throat pipe 320 having a draft angle that increases the flow passage cross-sectional area of the throat pipe 320 from the bent portion 323 toward the downstream side is used, water and the inner wall of the throat pipe 320 are passed through the bent portion 323. If the air is trapped and air pools are generated, and the draft is increased so that the cross-sectional area of the flow path is increased, the amount of air pools generated on the downstream side of the bent portion 323 increases. By inserting the interior member 500, the space where the inner wall of the throat pipe 320 and the water are separated can be reduced by the interior member 500, so that the amount of air pools generated can be reduced. By reducing the amount of air pool, the resistance of the water passing through the throat pipe 320 to the air can be reduced.

  Furthermore, as shown in FIG. 7, when the throat pipe 320 and the interior member 500 are fixed, a vibration space 600 that allows the interior member 500 to vibrate is provided between the throat pipe 320 and the interior member 500. Further, by configuring the interior member 500 to vibrate by the water passing through the interior of the interior member 500 throat pipe 320, the interior member 500 vibrates by the water passing through the interior member 500, and on the downstream side of the bent portion 323. In addition, by applying vibration to the air generated in the vicinity of the interior member 500, the air can be peeled off from the wall surface of the interior member 500, and the air can be discharged by the water passing through the inside of the throat pipe 320. As a result, air can be prevented from staying inside the throat pipe 320, and a decrease in the instantaneous flow rate of water supplied to the toilet body 10 can be suppressed.

  Further, by fixing only the second end portion 520 that is the downstream end portion of the vibrating interior member 500, the distance to the first end portion 510 where air accumulation is likely to occur is increased, and the interior member 500 is greatly vibrated. Can be made.

  Furthermore, the interior member 500 is configured so that the flow passage cross-sectional area of the interior member 500 is smaller than the flow passage cross-sectional area of the bent portion 323, thereby filling the range of the air pool generated at the bent portion 323 with the interior member 500. And the amount of air pockets can be reduced. Therefore, the fall of the instantaneous flow volume of the water supplied to the toilet bowl main body 10 can be suppressed.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 10: Toilet bowl main body 101: Upper surface 110: Bowl part 120: Rim part 130: Water conveyance path 131: Inlet 132: First water conveyance path 133: Water discharge part 134: Second water conveyance path 135: Water discharge part 140: Drain trap pipe 141 : Ascending flow path 142: descending flow path 20: tank 201: upper lid 210: first tank portion 211: bottom wall 212: opening 213: front side wall surface 214: left wall surface 220: second tank portion 221: bottom wall 231: water supply pipe 232: Constant flow valve 233: Main valve 234: Pilot valve 235: Vacuum breaker 236: Manual lever 237: Transmission mechanism 238: Float 239: Connection pipe 240: Bulkhead 241: Open / close window 260: Small tank 300: Jet pump unit 310: Nozzle 311: Injection port 320: Throat tube 321: Suction port 322: Upstream part (upper Part)
323: Bent portion 324: Downstream portion (lowering portion)
325: first curved surface 326: second curved surface 327: first downstream portion 328: second downstream portion 500: interior member air accumulation restraining means 510: first end portion 520: second end portion 530: fixed portion 600: vibration space FT: flush toilet device SW: drain pipe WT: sealed water

Claims (6)

A flush toilet device for washing the toilet body with wash water,
A toilet body having a bowl portion for receiving filth, and a water conduit for guiding water supplied as washing water to the bowl portion;
A tank for storing water therein and supplying the water to the inlet of the water conduit;
A jet pump unit disposed inside the tank,
The jet pump unit is
A throat pipe having one end connected to the inlet of the water conduit and the other end formed with a suction port;
A nozzle that induces a jet pump action by injecting high-speed water from the suction port toward the inside of the throat pipe, and
A bent portion that is bent is formed between the suction port and the inlet of the water conduit, and a channel cross-sectional area is enlarged on the downstream side of the bent portion,
Suppressing air accumulation generated downstream of the bent portion by inserting an interior member into a portion where the flow passage cross-sectional area inside the throat pipe expands ,
The flush toilet apparatus according to claim 1, wherein the interior member is vibrated by a water flow passing through the inside of the throat pipe . The throat pipe is composed of an upstream part upstream from the bent part and a downstream part downstream from the bent part,
The bent portion has a first curved surface and a second curved surface having a smaller curvature than the curvature of the first curved surface, and the wall surface on the descending portion side downstream from the first curved surface is defined as a first downstream portion. In case
The interior member is flush toilet device according to claim 1, characterized in that inserted into the first downstream portion. The flush toilet apparatus according to claim 2 , wherein the interior member is provided with a vibration space allowing vibration between the throat tube and the interior member in a state where the interior member is inserted into the throat tube. The flush toilet apparatus according to claim 3 , wherein the interior member is formed in an annular shape. When the interior member is inserted into the throat pipe,
It is composed of a first end that is an upstream end of the throat pipe, and a second end that is the downstream side of the throat pipe on the other end of the first end.
The second end portion has a fixing portion for fixing to the throat pipe,
The flush toilet apparatus according to claim 6 , wherein the fixing portion and the throat pipe are fixed. The flush toilet apparatus according to claim 4 , wherein a flow passage cross-sectional area of the interior member is configured to be smaller than a flow passage cross-sectional area of the bent portion.

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