JP6306405B2 - Liquid discharge structure - Google Patents

Description

  The present invention relates to a liquid discharge structure for discharging a liquid from a container used for transporting or storing the liquid.

  In general, a container (tank) used for transporting or storing liquid is configured in a substantially rectangular parallelepiped box shape, and an upper wall portion thereof is provided with a filling port capable of filling the container with liquid, and a side wall portion. In the lower part, a discharge port is formed so that the liquid stored in the container can be discharged (see, for example, Patent Document 1). It is also known to connect a suction device capable of sucking liquid to the discharge port in order to automate and speed up discharge of the liquid stored in the container.

Japanese Patent No. 3978435

  By the way, conventionally, when the liquid in the container is discharged using the suction device, the water level of the liquid stored in the container is located below the upper end of the discharge port, and air is also sucked into the suction device. Then, with this as a trigger, the drive of the suction device automatically stops. In this case, when the driving of the suction device is automatically stopped, there is a concern that the liquid whose level is slightly lower than the upper end of the discharge port may remain in the container.

  When the container is used for transportation, generally, the container from which the stored liquid is extracted by the suction device is returned with the remaining liquid as it is. Therefore, there is a waste in terms of the efficiency of transporting the liquid such that it is returned without being used even if it is transported, and in addition, for example, if the returned liquid is discarded at the transport source, the liquid itself is wasted. I am worried about it. On the other hand, for example, it is conceivable to incline the container after suction by the suction device at the transport destination and discharge the remaining liquid, or to prepare a second suction device for sucking the remaining liquid. However, in such a case, there is a concern that workability may be significantly reduced, a risk such as liquid spilling may occur, an operator may increase the frequency of touching the liquid, and the like.

  The present invention has been made to solve the above-described problems and the like, and an object of the present invention is to provide a liquid discharge structure that can discharge the liquid stored in the container more efficiently. It is in.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to a corresponding means are added as needed.

Means 1. Opening and closing means for opening and closing the discharge port formed in the lower portion of the side wall of the container capable of storing liquid,
A suction device capable of sucking a liquid is directly or indirectly connected to the discharge port,
A substantially cylindrical liquid remaining prevention part that is provided so as to protrude from the discharge port to the inside of the container and guides the liquid stored in the container to the discharge port when the suction device is driven. Prepared,
The inlet allowing the inflow of the liquid stored in the container among the liquid remaining prevention parts is formed so as to face the bottom wall portion of the container ,
The liquid remaining prevention part is
While being configured as a separate body from the container,
An engagement portion engaged with an engaged portion formed in a connection pipe connected to the discharge port;
By the engagement portion and the engaged portion being in an engaged state, relative displacement between the liquid remaining prevention part and the container is prevented,
The connection pipe is attached to the container, so that at least the engaging portion of the liquid remaining prevention part is disposed so as to be sandwiched between the connection pipe and the container. Discharge structure.

  According to the means 1, the “mechanism for extracting (discharging) the liquid stored in the container using the suction device” is provided by the inlet of the liquid remaining prevention part provided so as to protrude from the discharge port to the inside of the container. "Suction port" is formed. And the said suction opening will be provided facing the bottom wall part upper surface of a container. With this configuration, the upper end position of the suction port (opening) can be lowered than the upper position of the discharge port. Therefore, when using a suction device that automatically stops driving when air is sucked, the remaining amount of liquid stored in the container at the stage where the suction device automatically stops is reduced (or almost remains). Not to be able to).

  Therefore, for example, when the container is used for transportation, the remaining amount of the liquid is reduced even if the container in which the stored liquid is extracted by the suction device is returned with the remaining liquid as it is. In this way, waste related to the liquid transport efficiency can be suppressed. For example, even when the returned liquid is discarded at the transportation source, waste of the liquid itself can be suppressed by reducing the remaining amount of the liquid. Furthermore, for example, the container can be tilted after the suction by the suction device to discharge the remaining liquid or the second suction device for sucking the remaining liquid is not prepared at the transport destination. The stored liquid can be sufficiently discharged. As a result, the liquid stored in the container can be discharged more efficiently.

Further, when the liquid remaining prevention part is attached to the connecting pipe, relative displacement between the liquid remaining preventing part and the container is prevented. For this reason, for example, it is possible to more reliably prevent a situation in which the inlet of the liquid remaining prevention part is displaced so as to be sideways or upward. In addition, for example, it is possible to improve the mounting workability compared to the configuration in which the liquid remaining prevention part is attached with a screw or the like, and it is not necessary to form a screw hole in the liquid remaining prevention part or the connection pipe. The risk of liquid leakage can be reduced.

Further, according to the means 1, it is possible to prevent the engagement portion from being displaced such that the engagement state between the engagement portion and the engaged portion is released, and the connection between the liquid remaining prevention part and the connection pipe can be prevented. The state can be maintained more reliably.

  Mean 2. The liquid discharge structure according to claim 1, wherein the liquid remaining prevention part is configured as a separate body from the container and is configured to be inserted into the container through the discharge port. .

  According to the means 2, the liquid remaining prevention part can be inserted (attached) from the outside to the inside of the container through the discharge port. For this reason, for example, compared with the structure which must attach a liquid residue prevention part from the inner side of a container with respect to the discharge port formed in the side wall part lower part of a container, improvement of workability | operativity can be aimed at. Furthermore, it is not necessary to form a relatively large opening (also serving as a filling port for filling liquid) with respect to the upper part of the container so as to allow the operation of mounting the liquid remaining prevention part, and the filling port is configured to be as small as possible. It is also possible. In addition, since the container and the liquid remaining prevention part are configured as separate bodies, the respective moldability can be improved.

Means 3 . Packing is provided for the connection part between the liquid remaining prevention part and the connection pipe,
The liquid discharge structure according to claim 1 or 2 , wherein the packing is disposed so as to contact or be close to the container when the connection pipe is attached to the container.

According to the means 3 , it is possible to more reliably prevent a situation in which the liquid leaks from the connection portion between the liquid remaining prevention part and the connection pipe. In addition, since the packing is in contact with or close to the container when the connecting pipe is attached to the container, it is possible to prevent the packing from falling off.

It is sectional drawing of the liquid discharge structure in which the discharge hole is in an open state. It is sectional drawing of the liquid discharge structure in which a discharge hole is in a closed state. It is a disassembled perspective view which shows a connection pipe, a piston, and a liquid remaining prevention part. It is a disassembled perspective view which shows a connection pipe, a piston, and a liquid remaining prevention part. It is a perspective view containing a partial cross section which shows a connection pipe, a piston, and a liquid remaining prevention part. It is a perspective view containing a partial cross section which shows a connection pipe, a piston, and a liquid remaining prevention part. It is a perspective view containing a partial cross section which shows a connection pipe, a piston, and a liquid remaining prevention part. It is the elements on larger scale which show the J section of FIG.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1, 2, etc., a container 1 capable of storing liquid is attached with a valve device 4 that enables extraction of the liquid stored in the container 1 using a suction device 2. .

  The container 1 is configured in a substantially rectangular parallelepiped box shape (tank shape), and a circular discharge hole 12 that allows the liquid in the container 1 to be discharged is formed in a lower portion of the side wall portion 11 of the container 1. Further, a discharge pipe 13 having a substantially cylindrical shape protruding outward from the peripheral edge of the discharge hole 12 and having an external thread formed on the outer peripheral side is provided. Although not shown, the upper portion of the container 1 has a circular filling hole that allows the liquid to be filled in the container 1 and a cylindrical shape that protrudes upward from the peripheral edge of the filling hole. A filling tube having a male screw is formed, and a cap for closing the filling hole is detachably attached to the filling tube. The container 1 of this embodiment is integrally formed of polypropylene. In the present embodiment, the discharge passage 12 and the internal flow path of the discharge pipe 13 constitute a discharge port.

  As shown in FIG. 1 and the like, the valve device 4 includes a substantially cylindrical connecting pipe 21 having one end attached to the discharge pipe 13 of the container 1 and the other end connected to the hose 3 of the suction device 2. A piston 22 as an opening / closing means capable of opening and closing the internal flow path of the connection pipe 21; an operation unit 23 provided so as to be operable by an operator; and a shaft 24 for interlocking the operation unit 23 and the piston 22. Yes. In addition, the connection pipe 21, the piston 22, the operation part 23, and the axis | shaft 24 of this embodiment are each formed with the polypropylene.

  As shown in FIGS. 3, 4, etc., the piston 22 includes a substantially disk-shaped lid portion 26 that is slightly smaller than the inner diameter of the connection pipe 21, and a base plate 27 that protrudes from the back surface side of the lid portion 26. Yes. An annular groove 28 having a substantially arc-shaped cross section is formed on the entire outer periphery of the lid portion 26, and a closing packing 29 (see FIG. 1 and the like) that is annular and has a substantially circular cross section is formed in the annular groove 28. It is installed.

  As shown in FIG. 5, FIG. 6, and the like, guide rails 31 configured by two sets of ribs extending along the extending direction of the connecting pipe 21 are opposed to each other on the inner peripheral surface of the connecting pipe 21. It is formed in a pair at the position. Then, both side portions of the base plate 27 of the piston 22 are inserted into the guide rails 31 respectively. Thereby, the piston 22 is configured to be slidable along the extending direction of the connecting pipe 21.

  Further, the lid 26 is configured to be able to appear and retract from the opening on the container 1 side of the connection pipe 21 with the sliding movement of the piston 22. As shown in FIG. 2, when the lid portion 26 is located inside the connection pipe 21, the closing packing 29 is pressed against the inner peripheral surface of the connection pipe 21. As a result, the internal flow path of the connecting pipe 21 is closed without any gap, and the discharge hole 12 is closed so that the liquid in the container 1 cannot be discharged. On the other hand, as shown in FIG. 1, when the lid portion 26 is located outside the connection pipe 21, the internal flow path of the connection pipe 21 is opened and the discharge hole 12 can discharge the liquid in the container 1. Will be in an open state.

  As shown in FIGS. 1 and 2, the shaft 24 is a rod-shaped body having a substantially circular cross section, and is inserted into the connection tube 21 through a shaft hole 32 formed in the upper portion of the connection tube 21. Of the parts inserted into the connecting pipe 21, the middle part in the vertical direction is bent and formed in a substantially U shape so as to bulge sideways. Further, the base plate 27 of the piston 22 is formed with a slide hole 27a (see FIG. 3 and the like) extending in a direction orthogonal to the slide direction of the piston 22, and the shaft 24 has a shaft 24 with respect to the slide hole 27a. The bulging part is inserted.

  Further, the operation portion 23 is attached (fixed) to the upper portion of the shaft 24 so as not to be relatively displaceable, and the operation portion 23 is attached to the peripheral portion of the shaft hole 32 so as to be rotatable. In addition, the lower portion of the shaft 24 is pivotally supported by a bearing portion 34 formed inside the connection pipe 21. With the above-described configuration, when the operation unit 23 is rotated, the shaft 24 is rotated and displaced, and the piston 22 is slid (displaced and retracted) in conjunction with the rotational displacement of the shaft 24. It has become.

  As shown in FIGS. 1 and 2, a cap nut 35 for connecting to the discharge pipe 13 is attached to a portion of the connection pipe 21 closer to the container 1 than the shaft hole 32 on the outer peripheral side. Yes. The cap nut 35 has a cylindrical shape, and has a main body portion 36 formed with an internal thread on the inner peripheral side, and a locking portion 37 that protrudes from the entire periphery of the edge on the shaft hole 32 side of the main body portion 36 toward the inner peripheral side. And. On the other hand, a pedestal portion 38 that protrudes outward from the connection tube 21 and extends over the entire circumference of the connection tube 21 is provided in a portion of the connection tube 21 that is slightly closer to the container 1 than the shaft hole 32. . And the latching | locking part 37 is latched so that rotation with respect to the surface at the side of the axial hole 32 of the base part 38 is possible.

  Further, the distal end portion of the discharge pipe 13 is inserted between the connection pipe 21 and the cap nut 35, and the cap nut 35 is held while holding the connection pipe 21 in a posture in which the shaft hole 32 (operation part 23) faces upward. , The external thread formed on the outer peripheral side of the discharge pipe 13 is screwed to the internal thread formed on the inner peripheral side of the cap nut 35. As described above, the connection pipe 21 is attached to the discharge pipe 13 (container 1). A seal packing 39 is mounted on the container 1 side of the pedestal portion 38. When the connection pipe 21 is attached to the discharge pipe 13, the seal packing 39 is connected to the pedestal section 38 of the connection pipe 21 and the discharge pipe. And 13 tip portions. Thereby, the situation where the liquid leaks from between the connection pipe 21 and the discharge pipe 13 is prevented.

  As shown in FIG. 1, in this embodiment, the liquid stored in the container 1 is connected to the connection pipe when the suction device 2 is driven so as to protrude from the discharge hole 12 to the inside of the container 1. 21 and eventually a liquid remaining prevention part 41 for guiding to the suction device 2 is attached. As shown in FIGS. 3, 4, etc., the liquid remaining prevention part 41 is attached to the connection pipe 21 of the substantially cylindrical part main body 42 attached to the container 1 side of the connection pipe 21 and the part main body 42. A closing wall 44 that closes the opening on the side opposite to the opening on the side (hereinafter also referred to as “connection port 43”) is provided. Further, the liquid remaining prevention part 41 has an inlet 45 formed so as to cut out a lower part of the part main body 42 on the end side closed by the closing wall 44.

  Further, as shown in FIG. 4 and the like, four engaging claws 46 serving as engaging portions projecting toward the inner peripheral side of the part main body 42 are formed on the inner peripheral surface of the part main body 42 on the connection port 43 side. They are provided at approximately equal positions. On the other hand, on the outer peripheral surface of the connection pipe 21, there are four engagement grooves 47 extending from the end on the container 1 side along the extending direction of the connection pipe 21 so as to correspond to the engagement claws 46. At the same time, an engagement recess 48 is formed at the tip of each engagement groove 47 so as to be further lowered.

  Then, as shown in FIG. 7, FIG. 8, etc., the liquid residue preventing part 41 is connected to the connection tube 21 in a state where the engagement claw 46 of the liquid residue preventing part 41 is aligned with the engagement groove 47 of the connection tube 21. By covering the outer peripheral side, the engaging claw 46 is guided by the engaging groove 47 and eventually engaged with the engaging recess 48. When the engaging claw 46 and the engaging recess 48 are engaged, the liquid remaining prevention part 41 is prevented from being displaced in the direction of dropping from the connecting pipe 21 or being relatively rotationally displaced. The Rukoto. In this embodiment, after the liquid remaining prevention part 41 is attached to the connection pipe 21, the connection pipe 21 to which the liquid residual prevention part 41 is attached is attached to the discharge pipe 13 (container 1).

  In addition, by engaging the engagement claw 46 with the engagement recess 48, the inlet 45 of the liquid remaining prevention part 41 faces the opposite side of the shaft hole 32 of the connection pipe 21. For this reason, by attaching the connection pipe 21 to the discharge pipe 13 so that the shaft hole 32 faces upward, the inlet 45 of the liquid remaining prevention part 41 faces downward. In the present embodiment, the engagement groove 47 and the engagement recess 48 constitute the engaged portion.

  Further, on the outer peripheral side of the connection pipe 21, support ribs 49 extending over the entire circumference of the connection pipe 21 are arranged in the longitudinal direction of the connection pipe 21 at a portion between the engagement recess 48 and the pedestal portion 38. Three rows are formed. The front end portion of the support rib 49 in the protruding direction from the outer peripheral surface of the connection pipe 21 is substantially the same as the outer peripheral surface of the liquid remaining prevention part 41 in which the engagement claw 46 is engaged with the engagement recess 48 in the inner and outer directions of the connection pipe 21. It is configured to be in the same position (the support rib 49 is located slightly outward).

  Furthermore, the outer diameter of the part main body 42 of the liquid remaining prevention part 41 is configured to be substantially the same (slightly smaller) as the inner diameter of the discharge hole 12 and the discharge pipe 13. In addition, the protruding length of the pedestal portion 38 from the connection pipe 21 is larger than the protruding length of the support rib 49 so as to allow insertion of the discharge pipe 13 between the main body portion 36 of the cap nut 35 and the support rib 49. The discharge pipe 13 is made longer by about the thickness.

  With the above configuration, the liquid remaining prevention part 41 can be inserted into the discharge pipe 13 and the discharge hole 12, and the part of the connection pipe 21 that is closer to the container 1 than the base 38 is inserted into the discharge pipe 13. It is configured to be possible. When the connection pipe 21 is attached to the discharge pipe 13, the leading edge of the support rib 49 is substantially in contact with the inner peripheral surface of the discharge pipe 13.

  In addition, the end of the connecting pipe 21 of the present embodiment on the container 1 side is outside the side wall 11 (discharge hole 12) in the attached state to the discharge pipe 13, but in the vicinity of the discharge hole 12. positioned. For this reason, the liquid remaining prevention part 41 attached to the end of the connection pipe 21 on the container 1 side protrudes from the discharge hole 12 to the inside of the container 1 when the connection pipe 21 is attached to the container 1 (discharge pipe 13). Will be. In addition, the inlet 45 facing downward as described above faces the bottom wall portion 14 of the container 1.

  Then, as shown in FIG. 1, the hose 3 of the suction device 2 is connected to the connection pipe 21 attached to the discharge pipe 13, the internal flow path of the connection pipe 21 is opened, and then the suction device 2 is driven. By doing so, the liquid in the container 1 is sucked from the inlet 45 of the liquid remaining prevention part 41 and sent to the hose 3 of the suction device 2 via the liquid remaining prevention part 41 and the connection pipe 21. It has become. In addition, the site | part located under the liquid remaining prevention part 41 among the bottom wall parts 14 of the container 1 is comprised so that it may become one step lower than another site | part, and the surrounding site | part is formed in the said one step lower. Inclined and extended toward the part. Thereby, when the remaining amount of the liquid stored in the container 1 is reduced, the liquid is easily collected below the liquid remaining prevention part 41.

  Furthermore, since the connection pipe 21 is inserted into the discharge pipe 13 from the end on the container 1 side to the formation range of the support rib 49, the support rib 49 is included in the outer peripheral surface of the connection pipe 21. The engaging claw 46 that is engaged with the engaging recess 48 formed in the portion closer to the container 1 is sandwiched between the outer peripheral surface of the connection pipe 21 and the inner peripheral surface of the discharge pipe 13. It will be located in this way.

  In addition, when the discharge hole 12 is in an open state (the internal flow path of the connection pipe 21 is in an open state), the lid portion 26 of the piston 22 protrudes to the inside of the container 1 from the discharge hole 12, and this embodiment Then, the lid portion 26 is positioned in the vicinity of the blocking wall portion 44. That is, the liquid remaining prevention part 41 has a shape that allows displacement of the piston 22 while avoiding an increase in size. In addition, in the inner and outer directions of the side wall portion 11 of the container 1, the edge on the outer side (connection pipe 21 side) of the side wall portion 11 of the inlet 45 of the liquid remaining prevention part 41 is the discharge hole 12 (discharge hole 12). Is substantially the same position as the side wall portion 11) where is formed. When the discharge hole 12 is in the open state, the back surface of the lid portion 26 of the piston 22 is located farther inward of the container 1 than the outer edge of the side wall portion 11 of the inlet 45.

  Further, the liquid residue preventing part 41 in which the engagement claw 46 is engaged with the engagement recess 48 and the connection portion between the connection pipe 21, more specifically, the edge on the connection port 43 side of the part main body 42, An annular liquid leakage prevention packing 50 is attached to a gap formed between the support rib 49 located closest to the container 1 side. In particular, in this embodiment, the liquid leakage prevention packing 50 is configured to be press-fitted between the end edge of the part main body 42 and the support rib 49. For this reason, even if the liquid remaining prevention part 41 is about to be displaced relative to the connecting pipe 21 to the outer side of the side wall portion 11, it is supported by the support rib 49 via the liquid leakage prevention packing 50 (relative displacement is prevented). ) Is configured as follows. Further, as described above, the outer diameter of the part main body 42 of the liquid remaining prevention part 41 and the outer diameter of the support rib 49 are slightly smaller than the inner diameter of the discharge pipe 13. When the connection pipe 21 is attached to the container 1, the connection pipe 21 is in contact with or close to the inner peripheral surface of the discharge pipe 13.

  In addition, the container 1 of this embodiment is used for transporting about 1000 liters of liquid, and it is not assumed that the container 1 is inclined at the time of discharging liquid. Further, in the present embodiment, the liquid remaining in the container 1 is approximately 2 liters or less by completing the discharge operation of the liquid in the container 1 using the suction device 2. However, for example, when the liquid discharge operation is completed using the suction device 2 with the liquid remaining prevention part 41 removed, about 30 liters of liquid remains in the container 1.

  As described above in detail, according to the present embodiment, the inlet 45 of the liquid remaining prevention part 41 provided so as to protrude inside the container 1 from the discharge hole 12 formed in the lower portion of the side wall 11 of the container 1. Thus, the “suction port” of the “mechanism for extracting (discharging) the liquid stored in the container 1 using the suction device 2” is configured. The suction port is provided to face the upper surface of the bottom wall portion 14 of the container 1. With this configuration, the upper end position of the suction port (opening) can be made lower than the upper end position of the discharge hole 12. Therefore, when using the suction device 2 that automatically stops driving when air is sucked, the remaining amount of liquid stored in the container 1 at the stage where the suction device 2 automatically stops is reduced (or almost) Not to remain).

  Therefore, for example, when the container 1 is used for transportation, even if the container 1 from which the stored liquid has been extracted by the suction device 2 is returned with the remaining liquid intact, the remaining amount of liquid remains. By being reduced, it is possible to suppress waste related to the liquid transport efficiency. For example, even when the returned liquid is discarded at the transportation source, waste of the liquid itself can be suppressed by reducing the remaining amount of the liquid. Further, for example, at the transport destination, the container 1 is tilted after the suction by the suction device 2 to discharge the remaining liquid, or the second suction device for sucking the remaining liquid is not prepared. The liquid stored in the container 1 can be sufficiently discharged. As a result, the liquid stored in the container 1 can be discharged more efficiently.

  Further, the liquid remaining prevention part 41 is configured as a separate body from the container 1 and is configured to be insertable from the outside to the inside of the container 1 through the discharge pipe 13 and the discharge hole 12. For this reason, for example, compared with the structure which should attach the liquid residue prevention part 41 from the inner side of the container 1 with respect to the discharge hole 12 formed in the side wall part 11 lower part of the container 1, improvement of workability | operativity is aimed at. Can do. Furthermore, it is not necessary to form a relatively large opening (also serving as a filling port for filling the liquid) with respect to the upper part of the container 1 so as to allow the operation of attaching the liquid remaining prevention part 41, and the filling port is made as small as possible. It can also be configured. In addition, since the container 1 and the liquid remaining prevention part 41 are configured as separate bodies, the respective moldability can be improved.

  Further, by engaging the engagement claw 46 formed on the liquid remaining prevention part 41 with the engagement recess 48 formed on the connection pipe 21, the liquid remaining prevention part 41 is connected to the connection pipe 21, and thus the container 1. It is comprised so that relative displacement is impossible. For this reason, for example, the situation where the inlet 45 of the liquid remaining prevention part 41 is displaced so as to be sideways or upward can be more reliably prevented. In addition, for example, the mounting workability can be improved as compared with the configuration in which the liquid remaining prevention part 41 is mounted with a screw or the like, and the liquid remaining preventing part 41 or the connection pipe 21 does not have to be formed with a screw hole. The risk of liquid leakage can be reduced.

  Further, the engagement claw 46 of the liquid remaining prevention part 41 is engaged with the engagement recess 48 formed on the outer peripheral surface of the connection pipe 21, and the portion of the connection pipe 21 where the engagement recess 48 is formed is In the state where the connecting pipe 21 is attached to the discharge pipe 13, the connection pipe 21 is configured to be inserted inside the discharge pipe 13 of the container 1. As a result, when the connecting pipe 21 is attached to the discharge pipe 13, the engaging claw 46 is disposed so as to be sandwiched between the connecting pipe 21 and the discharge pipe 13. Therefore, the displacement of the engagement claw 46 such that the engagement state between the engagement claw 46 and the engagement recess 48 is released can be prevented, and the connection state between the liquid remaining prevention part 41 and the connection pipe 21 can be reduced. It can be maintained more reliably.

  In addition, the liquid leakage prevention packing 50 is provided between the support rib 49 and the connection portion between the liquid remaining prevention part 41 and the connection pipe 21, specifically, the edge of the part main body 42 on the connection port 43 side. Therefore, it is possible to more reliably prevent a situation in which the liquid leaks from the connection portion between the liquid remaining prevention part 41 and the connection pipe 21. In addition, the portion of the connection pipe 21 to which the liquid leakage prevention packing 50 is attached is also a portion that is inserted inside the discharge pipe 13, so that the liquid leakage prevention packing 50 is also substantially omitted on the inner surface of the discharge pipe 13. It will abut. For this reason, the displacement in the drop-off direction of the liquid leakage prevention packing 50 is prevented, and the sealed state can be more reliably maintained.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the piston 22 is moved in and out in the valve device 4 to open and close the liquid flow path, but the opening and closing mechanism of the valve device 4 is not particularly limited. For example, the valve body that opens and closes the flow path may slide in a direction orthogonal to the extending direction of the connection pipe 21 or rotate within the flow path of the connection pipe 21. However, by adopting the piston 22, it is possible to further improve the sealing performance, pressure resistance, and the like.

  (B) Further, for example, the valve device 4 is omitted, a mechanism for opening and closing the discharge hole 12 with respect to the discharge pipe 13 of the container 1 is provided, and the hose 3 of the suction device 2 is directly connected to the discharge pipe 13. You may comprise. In the case of adopting this configuration, the liquid remaining prevention part 41 is attached to the peripheral portion of the discharge hole 12 of the container 1 or the discharge pipe 13. Even when the valve device 4 (connecting pipe 21) is provided as in the above embodiment, the liquid remaining prevention part 41 may be attached to the container 1.

  However, in the case where the valve device 4 (connection pipe 21) is provided, in order to ensure the integrity of the liquid remaining prevention part 41 and the connection pipe 21 (preventing liquid leakage at the connection site) more reliably, the liquid remaining It is desirable to connect the prevention part 41 and the connecting pipe 21 directly. In addition, compared to a configuration in which both the liquid remaining prevention part 41 and the connection pipe 21 are attached to the discharge pipe 13, the structure relating to the attachment is simplified, and after the liquid residual prevention part 41 is attached to the discharge pipe 13, the connection pipe When 21 is attached to the discharge pipe 13, it is possible to avoid a situation in which the attachment state of the liquid remaining prevention part 41 is deteriorated.

  Regardless of where the liquid remaining preventing part 41 is connected, when the liquid remaining preventing part 41 is attached, the liquid remaining preventing part 41 is not connected from the inside of the container 1 but from the outside through the discharge pipe 13 and the discharge hole 12. It is desirable that 41 can be attached. In this case, it is possible to improve the mounting workability of the liquid remaining prevention part 41.

  (C) In the above embodiment, the shape of the liquid remaining prevention part 41 is not particularly limited. For example, when the configuration of opening and closing the liquid flow path with the piston 22 in the valve device 4 is stopped, it is possible to R-process the upper corner portion on the tip side of the liquid remaining prevention part 41. Further, by configuring the connecting portion side of the valve device 4 with the liquid remaining prevention part 41 in, for example, a substantially rectangular tube shape, the liquid remaining preventing part 41 can also be configured in a substantially rectangular tube shape. However, when the liquid remaining prevention part 41 is viewed from the inside of the container 1 in the extending direction of the discharge pipe 13, the liquid remaining prevention part 41 is on the outer peripheral side than the discharge hole 12 (internal flow path of the discharge pipe 13). In the case where the liquid sticks out (for example, in the case of an elbow shape), the liquid remaining prevention part 41 is inserted into the container 1 from the outside of the container 1 through the discharge pipe 13 and the discharge hole 12. It becomes difficult or impossible. Therefore, when the liquid remaining prevention part 41 is inserted into the container 1 through the discharge pipe 13 and the discharge hole 12, the liquid remaining prevention part 41 is inserted into the discharge hole 12 (discharge pipe 13). Of the inner flow path). Further, as in the above-described embodiment, by configuring the flow path in the liquid remaining prevention part 41 as short and simple as possible (substantially linearly), for example, the flow path in the liquid remaining prevention part 41 is greatly bent. Compared to such a case, the flow of the liquid in the liquid remaining prevention part 41 can be made relatively smooth.

  The extending direction of the discharge pipe 13 may be obliquely upward toward the outside of the container 1 (the inlet 45 extends in parallel to the bottom wall portion 14). In this case, the inlet 45 of the liquid remaining prevention part 41 can be brought as close as possible to the upper surface of the bottom wall portion 14 without providing the formation position of the discharge hole 12 adjacent to the bottom wall portion 14.

  (D) In the said embodiment, although the container 1, the connecting pipe 21, the piston 22, the operation part 23, and the axis | shaft 24 are comprised by polypropylene, they are comprised by other resin materials, such as polyethylene, PET, and polyamide. It is good.

DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Suction device, 3 ... Hose, 4 ... Valve device, 11 ... Side wall part, 12 ... Discharge hole, 13 ... Discharge pipe, 14 ... Bottom wall part, 21 ... Connection pipe, 22 ... Piston, 41 ... Liquid remaining prevention parts, 43 ... connection port, 45 ... inlet, 46 ... engagement claw, 48 ... engagement groove, 50 ... liquid leakage prevention packing.

Claims (3)

Opening and closing means for opening and closing the discharge port formed in the lower portion of the side wall of the container capable of storing liquid,
A suction device capable of sucking a liquid is directly or indirectly connected to the discharge port,
A substantially cylindrical liquid remaining prevention part that is provided so as to protrude from the discharge port to the inside of the container and guides the liquid stored in the container to the discharge port when the suction device is driven. Prepared,
The inlet allowing the inflow of the liquid stored in the container among the liquid remaining prevention parts is formed so as to face the bottom wall portion of the container ,
The liquid remaining prevention part is
While being configured as a separate body from the container,
An engagement portion engaged with an engaged portion formed in a connection pipe connected to the discharge port;
By the engagement portion and the engaged portion being in an engaged state, relative displacement between the liquid remaining prevention part and the container is prevented,
The connection pipe is attached to the container, so that at least the engaging portion of the liquid remaining prevention part is disposed so as to be sandwiched between the connection pipe and the container. Discharge structure. The liquid remaining preventing part, a liquid discharge structure according to claim 1, characterized in that it is insertable constructed inside the container through the front Symbol outlet. Packing is provided for the connection part between the liquid remaining prevention part and the connection pipe,
3. The liquid discharge structure according to claim 1, wherein the packing is disposed so as to contact or be close to the container when the connection pipe is attached to the container. 4.

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