JP2014046946A - Backflow prevention member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backflow prevention member having the function of preventing an extracted storage object from flowing backward to the storage body side, when extracting the storage object stored in a storage body by suction operation or press operation.SOLUTION: The backflow prevention member 1 comprises a cylindrical body part 10 having a cavity part 11 fitted in a cylinder part 55 and communicating with a flow passage and having a domed extraction side surface part 13 facing to the flow passage 52B side on the opposite side of the storage body 50 and forming an opening part 12 communicating with the cavity part 11 and a substantially semispherical elastic coating part 20 coated on the extraction side surface part, blocking up the opening part 12 and having a surface of becoming a flush shape. The elastic coating part 20 is formed with an openable notch 22 in the flow passage on the opposite side of the storage body, and is coated on the extraction side surface part 13 so as to seal the opening part side by bringing the opening part 12 side into close contact with the extraction side surface part in an unextracted state of the storage object and to have a space S for separating the notch 22 side from the extraction side surface part.

Description

  The present invention relates to a backflow prevention member having a function of preventing a stored item from flowing back to the container after suction when sucking and dispensing the stored items stored in various containers.

  2. Description of the Related Art Conventionally, there has been known a configuration in which, when a stored item stored in a container is poured out, the container is pressed and pressure is applied, and the stored item is discharged from a dispensing path such as a nozzle. In such a container, there is a demand to prevent the container that has been in contact with outside air from being returned to the container after the container is once poured out. For example, Patent Document 1 is configured such that a container such as a medicine or food is stored in a container, and after the container is pressed and poured out, the poured out container is not returned to the container. A container (container) is disclosed.

  The container disclosed in Patent Document 1 includes a backflow prevention member in which a plurality of openings are formed on a side surface of a nozzle that protrudes from a container and whose tip is closed, and an elastic sleeve is attached to the nozzle. ing. The backflow prevention member applies pressure to the container by applying a pressing force to the container, and the elastic sleeve is expanded through the opening by the pressure, and the container is placed between the surface of the nozzle and the inner surface of the elastic sleeve. It is the structure which can form the flow path which can pass and can pour out a contained material. When the pressing force against the container is released, the elastic sleeve is brought into close contact with the nozzle surface by its elastic force to close the opening, thereby preventing the container from returning to the container.

JP 61-60468

  By the way, when pouring out the contained items, not only the pressing force is applied to the containing body, but also the contained items are poured out by applying a suction force. In the backflow prevention member having the above-described configuration, even if an attempt is made to pour out the stored object by applying a suction force, the elastic sleeve is in close contact with the entire surface, so that the stored object is discharged by suction operation. I can't do it. In addition, it may be preferable to configure the contents so as not to flow backward to the container side even when the contents are poured out by such a suction operation. Furthermore, in the configuration in which the elastic member that can be elastically deformed as described above is used to prevent the backflow of the contents, it is preferable from the viewpoint of cost that the configuration of the elastic member itself is simplified.

  The present invention has been made paying attention to the above-described problem, and when the stored item stored in the container is poured out by suction operation or pressing operation, the extracted stored item flows back to the container side. It is an object of the present invention to provide a backflow prevention member having a function of preventing the backflow.

  In order to achieve the above-described object, the backflow prevention member according to the present invention is configured to be installed in a cylindrical portion having a flow path capable of pouring the contents accommodated in the container, A dome-shaped extraction-side surface that is fitted into the cylinder and has a hollow portion that communicates with the flow channel, faces the flow channel opposite to the container, and has an opening that communicates with the hollow portion. A cylindrical main body portion having a portion, and a substantially hemispherical elastic adherence portion that is attached to the surface portion of the dispensing side and closes the opening portion, and has a flush surface. The elastic adherence portion is formed with a slit capable of opening in the flow path on the side opposite to the container, and the opening side is in close contact with the dispensing-side surface portion in a non-poured state of the container. So that the opening side is sealed, and the cut side has a space spaced from the surface portion of the extraction side. Characterized in that it is applied to the serial spout side surface portion.

  In the backflow prevention member having the above-described structure, when a suction force is applied to the cylindrical portion connected to the container, the air in the flow path on the opposite side to the container is sucked, and the negative pressure state Thus, the internal pressure of the air in the cavity on the container side (in the flow path) increases, and the air with the increased internal pressure flows out from the opening, opens the seal portion with the elastic adherent, and the elastic adherent An extraction channel is formed between the extraction side surface portion and the extraction side surface portion. When the suction force is further applied, the air in the cavity (flow path) on the container side is sucked to be in a vacuum state, and the contents in the container are sucked. The sucked contents flow from the hollow portion into the extraction flow path opened through the opening, and are discharged through the cut. Then, when the suction operation is stopped, the elastic adherent portion again comes into close contact with the dispensing side surface portion on the opening portion side, seals the opening portion side, closes the opening portion, and closes the cut. As a result, the poured out contents are prevented from flowing back to the container side and do not enter the container.

  In the backflow prevention member having the above-described configuration, even when the container is pressed to pour out the contained material, the elastic adherend can act in the same manner as in the above-described suction operation. It is possible to prevent the stored item from flowing back into the container.

  According to the present invention, there is provided a backflow prevention member having a function of preventing the poured out stored material from flowing backward to the container side when the stored item stored in the container is poured out by suction operation or pressing operation. can get.

It is a figure which shows one Embodiment of the backflow prevention member which concerns on this invention, (a) is a perspective view which shows the whole structure, (b) is a disassembled perspective view, (c) is a top view of an elastic adherend part. The perspective view which shows the state which installed the backflow prevention member shown in FIG. 1 in the cylinder part of a container. The figure explaining the effect | action of the backflow prevention member installed as shown in FIG. 2 including (a) to (d) in order.

Hereinafter, the backflow prevention member according to the present invention will be described in detail with reference to the drawings.
1 and 2 are views showing an embodiment of a backflow prevention member according to the present invention, in which FIG. 1 (a) is a perspective view showing an overall configuration, FIG. 1 (b) is an exploded perspective view, and FIG. c) is a plan view of the elastic adherent portion, and FIG. 2 is a perspective view showing a state in which the backflow preventing member shown in FIG. 1 is installed in the cylindrical portion of the container.

  The backflow preventing member 1 according to the present embodiment is configured to be installed in a cylindrical portion 55 having a flow path 52 that can suck out and discharge the stored matter 60 stored in the storage body 50 (see FIG. 3). Has been. The container 50 is a so-called container in which various fluids that can be poured are stored, and its shape, constituent material, and the like are not particularly limited. What is necessary is just to become the structure which can pour out the accommodation 60 through the flow path 52 of the part 55. FIG. Moreover, about the said cylinder part 55, it is comprised with resin or a metal, for example, and the cylinder part 55 of this embodiment is formed in the cross-sectional circle shape.

  The backflow preventing member 1 is fitted into the flow path 52 of the cylindrical portion 55. In this case, the backflow preventing member 1 may be integrated with the cylindrical portion 55, or may be configured to fit the structure shown in FIG. It has the main-body part 10 and the elastic adherence part 20 adhere | attached on this cylindrical main-body part 10. FIG.

  The cylindrical main body 10 is integrally formed of, for example, a synthetic resin such as polyethylene or polypropylene, and includes a hollow portion 11 that communicates with the flow path 52 (the flow path 52A on the storage body side) of the cylindrical portion 55, and the storage body. And a discharge-side surface portion 13 in which an opening 12 communicating with the cavity 11 is formed. In this case, the dispensing-side surface portion 13 is formed in a dome shape in which the central region protrudes (swells) toward the discharge side (the surface may be a flat surface, but toward the center. It is preferably a curved shape that bulges).

  Further, the elastic adherent portion 20 is formed in a cap shape that can be attached to the dispensing-side surface portion 13 in a state where a seal region and a space as described later are formed. It itself is made of a deformable material. The elastic adherend 20 has a substantially flush surface, and has a substantially hemispherical shape (may be a strict hemispherical shape) so as to correspond to the surface shape of the dispensing-side surface portion 13. Is formed.

  The extraction-side surface portion 13 of the cylindrical main body portion 10 is a portion facing the flow channel 52B when the cylindrical main body portion 10 is fitted into the flow channel 52, and such an extraction-side surface portion 13 is provided. The openings 12 are formed, and in the present embodiment, a plurality of (four at approximately 90 ° intervals) openings 12 are formed at regular intervals along the circumferential direction.

  The fitting portion 10A of the cylindrical main body portion 10 is formed in a cylindrical shape, and a step portion 10B is formed at the upper end portion along the circumferential direction. And it fixes to the step part 10B in the state with which the lower end opening edge 20A of the elastic adherend part 20 formed in the said cap shape was applied. For this reason, when the elastic adherence portion 20 is attached to the dispensing-side surface portion 13, the elastic adherent portion 20 faces the surface (side surface) and the surface of the cylindrical main body portion 10 as shown in FIG. It has the structure which has the area | region 20B which becomes one shape.

  Thereby, even if a suction operation or a pressing operation is performed in a state where the cylindrical main body portion 10 with the elastic adherent portion 20 attached is fitted in the flow path 52, the elasticity attached to the dispensing-side surface portion 13 The adherend 20 is prevented from moving in the flow path direction.

  A cut 22 is formed in the elastic adherend 20. This notch 22 is formed by simply making a notch reaching the back surface with a cutter or the like on the surface of the elastic adherend portion 20. In this embodiment, as shown in FIG. It is formed as a streak. That is, the notch 22 is formed in the top region of the dispensing-side surface portion 13 so as to obtain an efficient dispensing effect when the elastic adherent portion 20 is adhered to the dispensing-side surface portion 13. When suction or pressure is applied to the stored item, the portion expands to become a discharge port through which the stored item passes. Thus, since only the cut 22 is formed in the elastic member formed in a cap shape, the elastic adherend 20 can be easily formed.

  Further, when the cap-like elastic adherent portion 20 is attached to the dispensing-side surface portion 13, a space S (see FIG. 3) that is separated from the notch-side surface portion is generated, and the opening 12 side is poured. It is formed so as to have a seal region P that is in close contact with the exit surface portion 13. That is, when the elastic adherent portion 20 is adhered to the dispensing side surface portion 13, a space S that is separated from the dispensing side surface portion 13 is formed over 360 ° around the notch 22, and the opening 12 side is A seal region P that is in close contact with the dispensing-side surface portion 13 is formed.

  Therefore, as shown in FIGS. 3 (a) and 3 (d), in the initial state (non-poured state of the contents), the opening 12 side is poured over 360 ° with the discharge port 22 as the center. The opening portion side is sealed in close contact with the side surface portion 13, and the notch 22 side is separated from the dispensing side surface portion 13, and the plurality of openings 12 are elastic of the elastic adherend portion 20. All are blocked by force. In this case, as described above, the plurality of openings 12 are formed at regular intervals along the circumferential direction, and by forming the notches 22 in the top region, a stable sealing function is exhibited.

The operation of the backflow preventing member 1 configured as described above will be described with reference to FIG.
In FIG. 3, the backflow prevention member 1 is shown in an enlarged manner as compared with the container 50 in order to easily explain the operation of the backflow prevention member 1.

  First, in the initial state shown in FIG. 3A, when a suction force is applied to the cylindrical portion 55 connected to the container 50 in which the object 60 is accommodated, the air in the flow path 52B on the side opposite to the container is detected. Is sucked into a negative pressure state. At this time, the elastic adherend 20 is stretched in the suction direction, and the portion of the notch 22 is pulled upward and opened. When the cut 22 is opened, the internal pressure of the air in the cavity 11 (in the flow path 52A) on the container 50 side is higher than that on the flow path 52A side. Then, a pressing force is applied to the opening 12 to open and widen the opening 12. When air flows into the opening 12, the space S is formed between the elastic adherend 20 on the side of the notch 22 and the extraction-side surface 13, so the pressure of the air that has flowed into the opening 12 Thus, the seal region P is separated from the dispensing side surface portion 13. That is, as shown by the arrow in FIG. 3B, the air in the cavity 11 acts to open (lift) the seal region P, and the elastic adherend 20 and the dispensing-side surface 13 The extraction flow path SP is formed between them. At this time, the air in the cavity portion 11 passes through the slit 22 that has been stretched and opened through the extraction flow path SP by a suction action, and is efficiently sucked from this portion.

  When a suction force is further applied, the air in the cavity 11 (flow path 52A) on the container 50 side is sucked to be in a vacuum state, and the object 60 in the container 50 is indicated by the arrow in FIG. It will be sucked as shown. As shown by the arrow, the sucked accommodation 60 flows into the extraction flow path SP from the cavity 11 through the opening 12 in the open state, and is extracted through the notch 22 formed in the top region. It comes to be.

  When the suction operation is stopped, as shown in FIG. 3 (d), the elastic adherent portion 20 is again brought into close contact with the dispensing surface portion 13 on the opening portion 12 side to seal the opening portion 12 side. 12 is closed and the elongated cut 22 is closed. Thereby, the poured out stored material is prevented from flowing back to the container side, and does not enter the container 50. That is, although a part of the stored contents after being poured out may be stored in the flow path 52B, it is surely prevented from entering (backflowing) the container 50, and the stored object 60 in the container. No longer affect

  In the above description, the example of sucking out the contents of the container 50 by suctioning out the contents has been described, but the same applies to the case of pouring out the contents by applying a pressing force to the container 50. It is possible to obtain an operational effect. That is, according to the configuration of the above-described backflow prevention member, a configuration can be obtained in which the stored item can be prevented from flowing back into the container after the pouring operation, regardless of whether the suction operation or the pressing operation is used.

  Further, the elastic adherend 20 formed with the opening 22 that opens and closes as described above can be appropriately deformed by its suction force or pressing force, but is about 0.02 MPa to 0.04 MPa. If the thickness is 0.5 mm or less, the above-described operation and effects can be sufficiently exhibited.

As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can change variously.
For example, the overall shape of the backflow preventing member 1 can be appropriately modified according to the shape of the corresponding cylindrical portion 55, and the shape (bulging shape) of the dispensing-side surface portion 13 and the formation thereof The number, position, shape, and the like of the openings 12 to be formed can be appropriately changed. In addition, the elastic adherent portion 20 only needs to be formed with the space S and the seal region P in relation to the opening, and the shape thereof can be appropriately changed. A book may be provided in parallel, or a plurality of cuts may be crossed.

DESCRIPTION OF SYMBOLS 1 Backflow prevention member 10 Cylindrical main-body part 11 Opening part 12 Opening part 13 Outlet side surface part 20 Elastic adherend part 22 Cut 50 Container 52 Flow path 55 Cylindrical part S Space P Sealing area

Claims (4)

A backflow prevention member installed in a cylindrical portion having a flow path capable of pouring out the contents accommodated in the container,
A dome-shaped extraction side that has a hollow portion that is fitted into the cylindrical portion and communicates with the flow channel, faces the flow channel on the opposite side of the container, and has an opening that communicates with the hollow portion. A cylindrical main body having a surface portion;
A substantially hemispherical elastic adherence portion that is attached to the dispensing-side surface portion and closes the opening, and has a flush surface.
Have
The elastic adherence portion is formed with a slit capable of opening in the flow path on the side opposite to the container, and the opening side is in close contact with the dispensing-side surface portion in a non-poured state of the container. Then, the backflow prevention member is sealed to the extraction side surface portion so that the opening side is sealed and the cut side has a space separated from the extraction side surface portion.   2. The backflow prevention member according to claim 1, wherein a plurality of the openings are formed at regular intervals along a circumferential direction of the extraction-side surface portion.   The backflow prevention member according to claim 1 or 2, wherein the cut of the elastic adherend is formed in a top region.   The backflow prevention member according to any one of claims 1 to 3, wherein the elastic adherent portion is attached to be flush with a surface of the cylindrical main body portion.

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