JP2014151962A - Backflow preventing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backflow preventing member which has a function of preventing a backflow of poured content to a storage body side when the content stored in the storage body is poured by suction operation or press operation.SOLUTION: A backflow preventing member 1 includes: a cylindrical main body part 10 having an outflow hole 10a opened to an inside of a cavity part 11; and an elastic adhering part 20 which is adhered to the cylindrical main body part 10, closes the outflow hole 10a, and has an opening part 20A. The cylindrical main body part 10 can be fitted to a cylinder part 55. The cylindrical main body part 10 and the elastic adhering part 20 are formed so that a gap G1, which is gradually narrowed as moving to a storage body side from the opening part 20A, is formed. When sucked from a pouring side, the content is poured from the opening part 20A by generating a convex flow in the gap G1, separating the elastic adhering part 20 from the cylindrical main body part 10, and thereby opening the closed outflow hole 10a.

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 preventing member according to the present invention is configured to be installed in a cylindrical portion having a flow path capable of pouring out the contents accommodated in the container, A cylinder having a cavity portion communicating with the flow path, a discharge-side surface portion exposed on the flow path side opposite to the container, and an outflow hole opened in the cavity section A cylindrical main body part, and an elastic adherence part that is attached to the cylindrical main body part and closes the outflow hole, and is formed with an opening that opens to the outlet side of the flow path, The cylindrical main body portion to which the elastic adherent portion is attached can be fitted into the cylindrical portion on the container side with respect to the outflow hole, and the cylindrical main body portion and the elastic adherent portion are disposed on the container side from the opening portion. When the suction is applied from the dispensing side, the gap is gradually reduced as it shifts to And cause convection in the gap is separated the elastic adhered portion from the tubular body portion, characterized in that open the outlet hole of the closing state to allow dispensing of the contained object from said opening.

  When the backflow prevention member having the above-described structure is installed in a cylinder portion having a flow path capable of pouring the contents, and a suction force is applied to pour the contents against the cylinder portion, it is opposite to the container. The air in the channel on the side is sucked into a reduced pressure state, and this air flow causes a convection phenomenon in a gap formed between the cylindrical main body and the elastic adherend. Due to this convection, the elastic adherend receives a force separating from the cylindrical main body, and a gap is created between the cylindrical main body and the elastic adherent attached to this, thereby forming a pouring channel. The At this time, since the outflow hole closed by the elastic adherend is opened, the air in the cavity (flow path) on the container side is sucked and the contents in the container are sucked. The sucked contents flow into the extraction flow path opened from the cavity through the outflow hole, and are extracted from the opening. When the suction operation is stopped, the elastic adherent portion is in close contact with the cylindrical main body portion and closes the outflow hole to exhibit a sealing effect. 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, and is a figure which shows the structure of an elastic adherend part and a cylindrical main-body 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. The figure which shows the 1st modification of the backflow prevention member which concerns on this invention. The figure which shows the 2nd modification of the backflow prevention member which concerns on this invention.

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 preventing member according to the present invention. FIG. 1 is a view showing a configuration of an elastic adherend and a cylindrical main body, and FIG. 2 is shown in FIG. It is a perspective view which shows the state which installed the backflow prevention member in the cylinder part 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. In the following configuration, the arrow A direction is defined as the dispensing side, and the arrow B direction is defined as the container side.

  The backflow preventing member 1 is fitted into the flow path 52 of the cylindrical portion 55. The backflow preventing member 1 may be integrated with the cylindrical portion 55 or may be configured to fit the structure shown in FIG. 1. The cylindrical main body portion 10 fitted into the flow path 52, And an elastic adherence portion 20 to be attached to the tubular main body portion 10. In this case, the backflow preventing member 1 is fitted into the flow path 52 of the cylindrical portion 55, but the fitted portion (the portion that is in close contact with the inner surface of the cylindrical portion 55 and exhibits a sealing effect) is accommodated more than an outlet hole described later. It is configured to be on the body side.

  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. 10A of the extraction side surface exposed to the flow path 52B side on the opposite side. That is, the cylindrical main body 10 has a configuration in which the container side is open and the extraction side is closed, and the hollow portion 11 constitutes the extraction side surface portion 10A and the cylindrical main body portion 10. The inner space is surrounded by the circumferential side wall 10B. The circumferential side wall 10 </ b> B is a portion that concentrically faces the inner circumferential surface 55 </ b> A of the cylindrical portion 55 and extends in the axial direction when the backflow preventing member 1 is installed in the cylindrical portion 55.

  The circumferential side wall 10 </ b> B is formed with an outflow hole 10 a for allowing the contents stored in the container to flow out from the cavity 11. In the present embodiment, the outflow holes 10a are formed in two places on the circumferential side wall 10B at an interval of 180 ° on the same horizontal line. In this case, the outflow hole 10a only needs to be formed in a portion that is closed (sealed) by the elastic adherend when an elastic adherend to be described later is attached to the cylindrical main body. Can be appropriately modified.

  The circumferential side wall 10B has a larger diameter on the lower side than the outflow hole 10a, and is configured to be fitted to the inner circumferential surface 55A of the cylindrical portion 55 (the portion with the larger diameter is provided). The fitting portion 10b). The fitting portion 10b is formed so as to be fitted to the cylinder portion 55 in a state where an elastic adherence portion to be described later is attached to the cylindrical main body portion 10, and is more elastic on the dispensing side than the fitting portion 10b. What is necessary is just to be formed so that the clearance gap G may arise between a to-be-adhered part and 55 A of inner peripheral surfaces of the cylinder part 55. FIG. In this case, the gap G is such that at least a portion where the outflow hole 10a is formed in the elastic adherence portion attached to the cylindrical main body portion 10 expands in the radial direction so that the outflow hole 10a can be opened. It suffices if it is formed.

  The extraction-side surface portion 10A is a surface portion that is bent or curved at a certain angle with respect to the above-described circumferential side wall 10B (or a surface portion in which these are combined), and in this embodiment, the central region is extracted. It is formed in a dome shape protruding (bulging) toward the side. Specifically, when viewed from the side as shown in FIG. 1, it has a substantially hemispherical shape (dome shape) that gradually decreases in diameter upward from the upper end of the circumferential side wall 10B, and is attached thereto. It is comprised so that the clearance gap G1 mentioned later may be formed between the inner surfaces of an elastic adherend part.

  As shown in FIG. 1, the elastic adherent portion 20 is formed in a substantially cylindrical shape as a whole so as to be attached to the tubular main body portion 10. For example, rubber or the like can be deformed itself. It is composed of various materials. In other words, the elastic adherend 20 has an opening 20A that protrudes and opens to the extraction side from the cylindrical main body 10 and an opening 20B that opens on the container side. It is configured to be in close contact with the region.

  Specifically, the elastic adherent portion 20 is in close contact with the circumferential side wall 10B of the cylindrical main body portion 10 to close the outflow hole 10a, and the outlet side from the circumferential side wall 10B is an opening portion 20A. The diameter is gradually reduced toward the end (having a reduced diameter portion 20a that is reduced in a cone shape). Moreover, when the part attached to the fitting part 10b of the said circumferential side wall 10B is installed in the said cylinder part 55, it closely_contact | adheres to the inner peripheral surface 55A, and the stored thing from a container side does not flow out. It comes to seal. 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 into the tubular portion 55, the elastic adherent portion 20 moves in the flow path direction. Thus, a stable dispensing operation is obtained, and a sealing effect is exhibited between the inner peripheral surface 55A and the inner peripheral surface 55A.

  The elastic adherence portion 20 has a gap G1 that gradually narrows as it moves from the opening portion 20A toward the container side due to the reduced diameter portion 20a between the elastic adherent portion 20 and the extraction side surface portion 10A of the cylindrical main body portion 10. Is formed. The gap G1 formed in this way makes it possible to cause convection in the gap G1 portion when suction is applied from the dispensing side, as shown in FIG. 20 can be separated from the cylindrical main body 10, and the outflow hole 10a in the closed state can be opened to pour out the contents.

  That is, by causing convection in the gap G1 portion, the elastic adherend 20 receives an action of separating from the circumferential side wall 10B, thereby opening the outflow hole 10a in the closed state and the circumferential side wall 10B. A pouring channel R is formed between the two so that the contents can be poured out.

  The opening 20 </ b> A is a portion where the contents are poured out, and the size is appropriately set according to the contents to be poured out. Further, the gap G1 only needs to be formed to such an extent that, when suction is applied, convection is generated in the gap and the elastic adherend 20 can be separated from the circumferential side wall 10B. Can be set as appropriate according to the angle of inclination, the thickness of the elastic adherend 20, the elastic force, and the like. In other words, the amount dispensed from the container can be adjusted by appropriately setting these configurations.

  In the present embodiment, the extraction-side surface portion 10A is formed in a dome shape in which the central region protrudes (expands) toward the extraction side, whereby the gap G1 extends in the circumferential direction. Since it is formed over the entire circumference so as to be uniform, convection can be generated uniformly in the circumferential direction, and the elastic coated portion 20 can be stably distributed over the entire circumference on the circumferential side wall 10B. (At the time of suction, it is possible to stably form a dispensing flow path R described later).

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 internal air moves along the extraction-side surface portion 10A and enters the gap (gap gradually narrowing toward the container) G1 in the peripheral portion, as shown in FIG. Convection occurs in the gap.

  Due to this convection, the elastic adherence portion 20 is separated from the circumferential side wall 10B as shown in FIGS. 3 (b) and 3 (c) on the extraction side of the fitting portion 10b of the cylindrical main body portion 10. As shown in FIG. 2, the elastic adherence portion 20 is formed so that a gap G is formed between the inner peripheral surface 55A of the cylindrical portion 55. It is possible to produce a dispensing flow path R). At the same time, the outflow hole 10a closed by the elastic adherend 20 is opened, and the internal pressure of the air in the cavity 11 (in the channel 52A) on the container 50 side is compared with the channel 52B side. Since the air is in a high state, the air in the flow path 52A acts to push and spread the elastic adherend 20 by applying a pressing force to the outflow hole 10a portion, and the elastic adherent 20 and the circle. An extraction flow path R is formed between the peripheral side wall 10B.

  As a result, the contents in the container flow into the pouring channel R opened from the cavity 11 through the outflow hole 10a, and are poured out from the opening 20A. When the suction operation is stopped, as shown in FIG. 3 (d), the elastic adherent portion 20 comes into close contact with the circumferential side wall 10B of the cylindrical main body portion 10, closes the outflow hole 10a, and exhibits a sealing effect. . As a result, the poured out contents are prevented from flowing back to the container side and do not enter the container. 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.

As mentioned above, although embodiment of this invention was described, this invention is not limited to above-described embodiment, It can change variously.
The overall shape of the backflow prevention member 1 described above (the shape of the cylindrical main body 10 and the elastic adherend 20) can be appropriately modified according to the shape of the cylinder 55 to be installed, and the surface on the dispensing side The shape of the portion 10 </ b> A is not limited to the shape shown in the drawing as long as a gap G <b> 1 that causes convection when a suction force is applied to the elastic adherent portion 20. For example, as shown in FIG. 4, the surface portion on the extraction side of the cylindrical main body 10 may be formed in a weight shape and protrude from the opening 20 </ b> A of the elastic adherend 20.

  Further, as shown in FIG. 5, the circumferential side wall 10B may have a configuration in which the fitting portion 10b is directly fitted into the cylindrical portion 55 (the elastic adherent portion is not attached to the fitting portion 10b). May be). In this case, the fitting part 10b is formed to bulge in the radial direction on the container side of the circumferential side wall 10B, and the elastic adherent part 20 applies the opening edge to the step part 10e forming the fitting part. It is attached in the attached state. According to such a configuration, the assembling property of the backflow preventing member is improved and the assembling property with respect to the cylindrical portion is also improved.

DESCRIPTION OF SYMBOLS 1 Backflow prevention member 10 Cylindrical main-body part 10A Outlet side surface part 10B Circumferential side wall 10a Outflow hole 10b Fitting part 11 Cavity part 20 Elastic adherend part 20A Opening part 50 Container 52 Flow path 55 Cylindrical part

Claims (2)

A backflow prevention member installed in a cylindrical portion having a flow path capable of pouring out the contents accommodated in the container,
An outflow hole is formed in the hollow portion and has a hollow portion that communicates with the flow path and has a discharge side surface portion that is exposed on the flow path side opposite to the container. A cylindrical main body portion,
An elastically adhered portion that is attached to the cylindrical main body portion and closes the outflow hole, and is formed with an opening that opens to the outlet side of the flow path;
Have
The cylindrical main body part to which the elastic adherent part is attached can be fitted into the cylindrical part on the container side from the outflow hole,
The cylindrical main body and the elastic adherend are formed so as to have a gap that gradually narrows from the opening toward the container, and convection is applied to the gap when suction is applied from the dispensing side. The backflow preventing member is characterized in that the elastic adherence portion is separated from the cylindrical main body portion, the outflow hole in the closed state is opened, and the contents can be poured out from the opening portion. The dispensing side surface portion is bulged and formed in a dome shape, and the elastic adherent portion is formed in a cylindrical shape so as to gradually reduce the diameter toward the opening,
A backflow preventing member, wherein the gap is formed uniformly in the circumferential direction.

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