Double container with pump

Abstract

To resolve such an inconvenience that removal of a discharge pump becomes difficult due to attachment of an inner container to the discharge pump.SOLUTION: A double container with a pump comprises: a discharge pump 10 which is detachably attached to a neck 6 of a double container body 1, and in which a connection part 30 is extended downward from around a suction port 28 at a lower end part of a cylinder 20 inserted into the neck 6; and a pump adapter 40 having a leg body 46 which extends from the connection part 30 to a bottom 2 side of the double container body 1. The leg body 46 hits the bottom 2 of the double container body 1 when attaching the discharge pump 10 to the neck 6, whereby the leg body deforms into a shape bulged laterally and outwardly. Further, by removing the discharge pump 10 from the neck 6, the bulged state of the leg body 46 is resolved, and the inner container 1b separates from an external surface of the leg body 46.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a double container with a pump. [Background technology]

[0002] It is known that the container is made up of a container body with a neck part standing up from a body part and a discharge pump attached to the neck part, the container body being a laminated container body made of an outer layer and an inner layer, and a retaining rib is formed by raising the bottom of the container body and sandwiching the inner layer between the outer layers inside the raised part (Patent Document 1). When the contents are sucked up and negative pressure is generated, the inner layer peels off from the outer layer at the body part, reducing its volume and deforming, while leaving the fixed parts to the outer layer at the retaining rib and neck part. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication 2014-193741 Summary of the Invention [Problem to be solved by the invention]

[0004] In the container of Patent Document 1, a phenomenon occurs in which the flexible inner layer clings to the discharge pump (hereinafter referred to as "clinging") during the dispensing operation. When the discharge pump is pulled out for refilling after the contents have been used up, the inner layer clinging to the discharge pump provides significant resistance to the pulling action, and there is also a risk that the suction pipe of the discharge pump will fall off.

[0005] An object of the present invention is to eliminate the inconvenience of a double container with a pump, in which the inner container is attached to the discharge pump, making it difficult to remove the discharge pump. [Means for solving the problem]

[0006] The first means is a double-container body 1 having a neck portion 6 standing upright from a body portion 4, and an inner container 1b that can be deformed by reducing its volume by applying negative pressure to the inside of an outer container 1a that is an outer shell portion; a discharge pump (10) that is removably attached to the mouth / neck portion (6) and has a suction port (28) at the lower end of a cylinder (20) inserted inside the mouth / neck portion (6) and a discharge port (39) in a discharge head (38) that is arranged above the mouth / neck portion (6) and can be raised and lowered, and a connecting portion (30) that extends downward from the periphery of the suction port (28); a pump adapter 40 connected to the connecting portion 30, having a leg body 46 extending from the connecting portion 30 toward the bottom 2 side of the double container body 1, and having a liquid introduction path P to the suction port 28 formed inside the leg body 46; It is equipped with The leg body 46 has elasticity and is formed so as to be deformed into a shape bulging outwardly to the side by hitting against the bottom part 2 when the discharge pump 10 is attached to the mouth and neck part 6. A reduction in the internal pressure of the double container body 1 causes the inner container 1b to be attached to at least the outer surface of the leg body 46 in the bulging form described above, and by removing the discharge pump 10 from the mouth and neck portion 6, the bulging state of the leg body 46 is eliminated, so that the outer surface of the leg body 46 and the inner container 1b are separated.

[0007] In this means, as shown in Fig. 1, a leg body 46 is provided which is connected to the lower end side of the cylinder 20 of the discharge pump 10 and extends towards the bottom 2 of the double container body 1. The leg body 46 is elastic, and when the discharge pump 10 is attached to the mouth and neck part 6 of the double container body 1, it hits the bottom 2 and deforms into a shape that bulges outwardly. When the content is discharged, the internal pressure decreases, and the inner container 1b clings to at least the outer surface of the leg body 46 in the bulged shape as shown in Fig. 4, and when the discharge pump 10 is removed from the mouth and neck part 6, the bulged state of the leg body 46 is eliminated, and the outer surface of the leg body 46 and the inner container 1b are separated, as shown in Fig. 5. According to this structure, the shape of the legs 46 bulging outwardly due to the abutment of the bottom 2 of the double container body 1 is eliminated by removing the discharge pump 10 from the mouth and neck portion 6. Therefore, the inner container 1b embraced by the legs 46 in the bulging shape described above is separated from the legs 46 by removing the discharge pump 10, and the resistance to being drawn by the discharge pump 10 can be reduced.

[0008] The second means has the first means, and the leg body 46 is composed of a plurality of leg supports 48 arranged at a distance from each other along an imaginary circumferential line I when viewed from below, and a vertically elongated communication port U is formed between adjacent leg supports 48, connecting the outside of the leg body 46 with the liquid introduction path P.

[0009] In this embodiment, as shown in FIG. 1, the leg body 46 is composed of a plurality of leg supports 48, and as shown in FIG. 2(B), a communication port U is formed between adjacent leg supports 48. With this structure, liquid can move smoothly between the inside and outside of the leg body 46 via the communication port U, and when the discharge pump 10 is removed from the mouth-neck portion 6, the inner container 1b is quickly released from its attachment to the leg body 46, so that the discharge pump 10 can be pulled out smoothly with little force.

[0010] The third means has the first means or the second means, and a fastening means B is formed for fastening the lower portions of the plurality of leg supports 48 to each other.

[0011] In this means, as shown in FIG. 2(A), a fastening means B is formed for fastening the lower portions of the plurality of leg supports 48 constituting the leg body 46 to each other. This structure can prevent the legs 46 from spreading outward at the lower ends, and can reliably cause the legs 46 to bulge outwardly.

[0012] The fourth means includes the second means or the third means, and the leg support 48 is formed into a vertically long plate-like portion and has an arcuate cross-sectional shape that is convex outwardly to the side over the entire longitudinal length.

[0013] In this embodiment, the leg support 48 has an arcuate cross-sectional shape that is convex outwardly over the entire length in the longitudinal direction (see FIG. 2(B)). This structure makes it possible to prevent inconveniences such as some of the leg supports 48 suddenly bending inward when the double container body 1 hits the bottom 2, and makes it possible to stably achieve a bulging state of the legs 46 outward to the sides. Effect of the Invention

[0014] According to the present invention, it is possible to eliminate the inconvenience that it is difficult to remove the discharge pump due to the attachment of the inner container to the discharge pump, and it becomes easy to replace the discharge pump. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a cross-sectional view of the structure of a double container with a pump according to an embodiment of the present invention (the structure in the state where the discharge pump has been fastened to the double container body). [Diagram 2] 2 shows the structure before the main component (pump adapter) of the container shown in FIG. 1 is assembled into the container, with FIG. 2(A) being a side view of the pump adapter and FIG. 2(B) being a bottom view. [Diagram 3] FIG. 3 is an explanatory diagram of the operation of the container of FIG. 2 before use, showing the intermediate stage of fastening the discharge pump to the double container body. [Figure 4] FIG. 3 is an explanatory diagram of the operation of the container of FIG. 2 after use, showing the state in which the contents have been used up and the inner container is clinging to the discharge pump and the pump adapter. [Diagram 5] 5 is an explanatory diagram of a process of pulling out the discharge pump from the state shown in FIG. 4. BEST MODE FOR CARRYING OUT THEINVENTION

[0016] 1 to 5 show a double container with a pump according to an embodiment of the present invention. This container is composed of a double container body 1, a discharge pump 10, and a pump adapter 40. Each of these members can be made of, for example, synthetic resin or metal.

[0017] In this embodiment, as shown in Fig. 1, the double-layered container body 1 has a neck portion 6 standing upright from the upper end of a body portion 4 connected to a bottom portion 2 via a shoulder portion 5. A male thread portion 8 is formed on the outer surface of the neck portion 6. However, these structures can be modified as appropriate. The double container body 1 consists of an outer container 1a which is the outer shell, and a flexible inner container (inner bag) 1b arranged inside this outer container 1a, and is formed so that the inner container 1b can be deformed to reduce its volume by creating a negative pressure inside. The double-layer container body 1 of this embodiment is a laminated container (delamination container) formed by laminating an inner layer 1b, which is an inner container, inside an outer layer 1a, which is an outer container. The bottom 2, body 4, shoulder 5, and neck / mouth 6 are each formed of an outer layer portion and an inner layer portion. The inner layer 1b is formed so that it can be peeled off from the outer layer 1a at the outer periphery of the bottom 2, the body 4, and the shoulder 5 by applying a negative pressure inside, with the neck / mouth 6 and a part of the bottom 2 (retaining rib 3a described later) being fixed to the outer layer 1a (non-peelable portion). Furthermore, the outer layer 1a has air inlet holes (not shown) at appropriate positions for introducing outside air between the outer layer 1a and the inner layer 1b. However, the double container body 1 may have any structure as long as it is possible for the inner container 1b to undergo volumetric deformation and cause the above-mentioned clinging when the internal pressure is negative.

[0018] In this embodiment, the bottom 2 has an outer periphery that serves as a grounding portion 2a for contacting an external placement surface, and a central portion that is formed as an upwardly raised portion 3. A holding rib 3a extending in the front-rear direction is formed on the inside of this raised portion. The retaining rib 3a is formed by sandwiching the inner layer 1b between the outer layers 1a from the left and right in the pinch-off portion of the mold and joining them. In Fig. 1, the symbol j represents the joining portion. These joining portions can be formed by recessing holes in the corresponding portions of the outer layer 1a and the inner layer 1b using pins attached to the pinch-off portion of the mold. In this specification, for convenience of explanation, the right side of FIG. 1 will be referred to as "rear", the left side as "front", and the directions perpendicular to the paper surface as "left and right". The lower end surface of the retaining rib 3a is formed flush with the grounding portion 2a and is formed so that when a leg 46 described later is pressed against the raised portion 3, the retaining rib 3a is formed to have a rigidity sufficient to resist the pressing force.

[0019] The discharge pump 10 is a member removably attached to the mouth-neck portion 6, and has a suction port 28 at the lower end of a cylinder 20 inserted inside the mouth-neck portion 6, and a discharge port 39 in a discharge head 38 arranged above the mouth-neck portion 6 so as to be movable up and down. The discharge head 38 is configured to suck the liquid in the double container body 1 through the suction port 28 and discharge it from the discharge port 39 by raising and lowering the discharge head 38. Most of the structure of the discharge pump 10 is known, so it will be described briefly. As shown in FIG. 1, the discharge pump 10 of this embodiment is formed of a mounting member 12, a cylinder 20, a valve member 32, a retaining tube 33, and an actuating member 34. The mounting member 12 is a member detachably attached to the mouth / neck portion 6, and in the illustrated example, is formed by an inward flange 16 protruding from the upper end of a mounting tube 14 which is fitted to the outer surface of the mouth / neck portion 6. A female thread portion 15 which meshes with the male thread portion 8 is formed on the inner surface of the mounting tube 14. The cylinder 20 has a flange 22 at the upper end of its peripheral wall (cylinder peripheral wall) and an annular bottom plate 26 at the lower end of the peripheral wall, and is vertically installed within the double container body 1 by placing the flange 22 on the upper end surface of the mouth / neck part 6 via a packing 23. The flange 22 and the packing 23 are sandwiched between the inward flange 16 and the mouth / neck part 6. A suction port 28 is opened on the inside of the annular bottom plate 26, and a cylindrical connecting portion (connecting cylinder portion) 30 extends downward from the lower surface of the annular bottom plate 26. In the prior art, the upper end of a suction pipe is connected to this connecting cylinder portion, but in the present invention, instead of the suction pipe, a base 42 of a pump adapter 40 described below is connected. The valve member 32 is disposed within the lower portion of the cylinder 20. The valve member 32 has a valve cylinder portion 32a disposed on the annular bottom plate 26, and a valve plate 32b elastically supported inside the valve cylinder portion 32a. The valve plate 32b and the annular bottom plate 26 form a first check valve V1. The retaining cylinder 33 is a means for preventing the piston 37, which will be described later, from falling off, and is assembled within an extension peripheral wall 24 that extends upward from the peripheral wall of the cylinder 20. In this embodiment, the actuating member 34 is configured by attaching a piston 37, which slides against the inner surface of the cylinder 20, around a piston guide 35 so as to be vertically movable, with the lower part of a stem 36 fitted onto the piston guide 35, and a discharge head 38 attached to the upper end of the stem 36. In the illustrated example, a second check valve V2 is formed between the lower end of the piston 37 and the piston guide 35. A coil spring C, which is a biasing means for the actuating member 34, is interposed between the piston guide 35 and the appropriate position of the valve member 32. The discharge head 38 is configured by concentrically extending a small-diameter mounting cylinder portion 38b, a medium-diameter inner peripheral wall 38e, and a large-diameter outer peripheral wall 38d from a top plate 38a, and by projecting a nozzle cylinder 38c forward from the upper end of the mounting cylinder portion 38b via the inner peripheral wall 38e and the outer peripheral wall 38d. The mounting cylinder portion 38b is fitted to the stem 36. A discharge port 39 is opened at the tip of the nozzle cylinder 38c.

[0020] The pump adapter 40 is attached to the connecting portion 30 of the discharge pump 10, and is a member for restricting the attachment of the inner container 1b described above. 2(A), the pump adapter 40 is formed of a base 42 and a hollow leg 46 suspended from the base 42. A liquid introduction passage P to the suction port 28 is formed inside the leg 46. However, the structure of the pump adapter 40 can be modified as appropriate.

[0021] The base 42 is a portion for assembly to the connecting tubular portion 30 of the cylinder 20. In the illustrated example, the base 42 is formed in a double-tubular shape by connecting the lower ends of an inner tubular portion 43 and an outer tubular portion 45, which are fitted to both the inner and outer surfaces of the cylindrical connecting tubular portion 30, at a connecting end portion 44. However, the structures of the base 42 and the connecting tubular portion 30 can be changed as appropriate.

[0022] In this embodiment, the leg body 46 is formed of a plurality of leg supports 48 (four in the illustrated example) connected to appropriate positions of the base (the inner cylinder portion 43 in the illustrated example). These leg supports 48 are elastic and are formed to be capable of bending and deforming to the sides and outwards. As shown in Fig. 2(B), the leg supports 48 in the illustrated example have an outwardly convex cross section (circular arc in the illustrated example) when viewed from below over the entire length in the longitudinal direction, and are formed as a vertical plate portion having a gutter shape as a whole. This prevents some of the leg supports 48 from bending in an unexpected direction (for example, inward), and enables the legs 46 to bulge outwards in a stable manner. The arrangement of these leg supports will be described in more detail later. In addition, the length of the leg body 46 is designed so that, in the state before the mounting tube 14 is attached to the mouth and neck portion 6 as shown in Figure 3, the height H2 from the lower end of the leg support 48 to the contact point of the discharge pump 10 against the upper end surface of the mouth and neck portion 6 (in the illustrated example, the lower surface of the gasket 23) is greater than the height H1 from the raised portion 3 of the double container body 1 to the upper end surface of the mouth and neck portion 6. The difference between the two heights H1 and H2 can be appropriately selected within the range of, for example, about 0.1 mm to 2 mm. By doing this, when the discharge pump 10 is attached to the mouth and neck portion 6 of the double container body 1, the tip (lower end) of the leg body 46 protruding downward from the base 42 is arranged to abut against the raised portion 3. This abutment causes the leg supports 48 to bend outwardly as shown in FIG. 1, so that the contour of the leg 46 as a whole is formed to bulge in a medium-thick (or barrel-like) shape. Then, by pulling out the discharge pump 10 from inside the double container body 1, the bent shape is restored to its original vertical shape as shown in Fig. 5, and the outline of the leg body 46 is also restored to its original shape (straight cylinder) at the time of molding. As a result, the leg body 46 separates from the inner container 1b, and a gap G is formed between the leg body 46 and the inner container 1b. Therefore, when the discharge pump 10 is pulled out, the inner container 1b that has been clasped against the outer surface of the pump adapter 40 during the discharge operation can be separated from the pump adapter 40 by the action of the legs 46 returning from the expanded form to their original form. Compared to the conventional structure in which a suction pipe is connected to the connecting tube portion 30, the resistance when pulling out the discharge pump 10 is significantly reduced compared to a state in which the inner container is tightly attached over the entire length of the suction pipe. In addition, the risk of the pump adapter 40 falling off the connecting tube portion 30, which occurs with the suction pipe of the conventional technology, can be avoided.

[0023] In this embodiment, the leg body 46 has a plurality of elongated communication holes U drilled equiangularly in the circumferential direction of the cylindrical tube wall T that hangs down from the connecting tube portion 30, and the tube wall portion between these communication holes U is formed in the leg support 48. A plurality of communication ports U are equiangularly arranged so that a gap G between the inner container and the leg body 46 is formed around the entire circumference of the leg body 46. In this embodiment, the multiple leg supports 48 are arranged along an imaginary single circumferential line I (in the illustrated example, a circumferential line that coincides with the circular outline of the connecting tubular portion 30) as seen from below, as shown in Fig. 2(B). However, the arrangement and shape of the leg supports 48 may be changed as long as the leg bodies 46 can deform between a state in which they bulge outwardly to the sides and their original shape (non-bulging state), thereby achieving the function of pulling apart the inner container 1b embraced by the leg bodies 46. The above-mentioned plurality of leg supports have the same shape and strength, and are formed so as to bend evenly when the discharge pump 10 is vertically lowered toward the double container body 1. The communication port U serves to communicate between the inside and outside of the leg body 46. Specifically, during a discharge operation, it serves as an inflow port through which liquid flows from the outside of the leg body 46 to the inside (liquid introduction path P). Furthermore, during the operation of removing the discharge pump 10, when the legs 46 return from the expanded state shown in Fig. 4 to the original state shown in Fig. 5, liquid can move smoothly from the inside of the legs 46 to between the legs 46 and the inner container 1b. This quickly releases the inner container 1b from its attachment to the legs 46, allowing the discharge pump 10 to be removed efficiently. In the illustrated example, the communication port U is formed in the shape of a slit that extends over the entire length of the leg body 46, but the shape thereof can be modified as appropriate.

[0024] In this embodiment, a bundling means B is provided to mutually bundling the tips (lower parts) of the multiple leg supports 48 protruding from the base 42. In the illustrated example, the tips of the leg supports 48 are formed into pieces 50 folded upward and inward, and bundling rings 52 are provided in series to connect these folded parts 50 as bundling means B. This prevents the legs 46 from spreading out at the lower ends. However, these structures can be modified as appropriate.

[0025] In the above configuration, when assembling the container of FIG. 1, first, the base portion 42 of the pump adapter 40 shown in FIG. Then, the legs 46 of the pump adapter 40 are inserted into the mouth and neck portion 6 of the double container body 1, and the tips of the legs 46 are abutted against the bottom portion 2 of the double container body 1 as shown in FIG. After this abutment, when the discharge pump 10 and the pump adapter 40 are further lowered by screwing (tightening) the mounting tube 14 into the neck portion 6, the leg supports 48 constituting the leg body 46 are bent outwardly to the side. As a result, the outline of the leg body 46 bulges outwardly to the side, resulting in the state shown in FIG. 1, the discharge head 38 is simply pressed down in the same manner as in the case of a conventional container. As the discharge head 38 rises and falls, the liquid in the cylinder 20 is discharged to the outside from the discharge port 39, and the liquid in the double container body 1 passes through the communication port U into the liquid introduction passage P and is sucked into the cylinder 20 through the suction port 28. During these steps, the inside of the inner container 1b becomes negative pressure, so that the inner container 1b is separated from the outer container 1a at the body 4 and shoulder 5 as shown in FIG. 4, and is held by the outer surface of the leg body 46 in the bulging form. When the contents are used up and the double container body 1 is to be replaced with a new double container body for refilling, the attachment tube 14 is unscrewed from the mouth and neck portion 6, and the discharge pump 10 is pulled out from the double container body 1. Then, as shown in Fig. 5, the legs 46 return from the outwardly bulging shape to their original shape and are separated from the inner container 1b. This releases the inner container 1b from its embrace on the legs 46, and the force required to pull out the discharge pump 10 is significantly reduced. In the embodiment shown in Fig. 5, the inner container 1b is not separated from the upper part of the legs 46, but is only in loose contact with a part of the legs 46 in the longitudinal direction, so that this does not significantly impede the pull-out of the discharge pump 10. Then, the removed discharge pump 10 can be attached to a new double container body 1 for refilling that has been prepared in advance, and can be used again.

[0026] According to the above-described structure and operation, the shape of the legs 46 that bulge outward when they hit the bottom 2 of the double container body 1 returns to its original shape when the discharge pump 10 is removed from the mouth and neck portion 6, and the state in which the inner container 1b is clinging to the outer surface of the legs 46 is released, thereby making it possible to reduce resistance to the withdrawal of the discharge pump 10. Since the movement of liquid between the inside and outside of the leg body 46 is smooth through the communication port U formed between the leg supports 48, the discharge pump 10 can be neatly removed with little force. Since the fastening means B is formed to fasten the lower portions of the plurality of leg supports 48 constituting the leg body 46 to each other, the leg body 46 can be prevented from spreading out at the lower end side. The leg support 48 has an arcuate cross-sectional shape that is convex outwardly to the sides over its entire length in the longitudinal direction, so that the leg body 46 can stably bulge outwardly to the sides. [Explanation of symbols]

[0027] 1... Double-layered container body (laminated container body) 1a... Outer container (outer layer) 1b... Inner container (inner layer) 2...Bottom part 2a...Grounding part 3...Rising part 3a...Retaining rib 4...Body part 5...Shoulder part 6... Neck part 8... Male thread part 10: Discharge pump; 12: Mounting member; 14: Mounting tube; 15: Female thread portion 16: Inward flange 20: Cylinder 22: Flange 23: Packing 24... Extension tube portion 26... Annular bottom plate 28... Suction port 30... Connection portion (connection tube portion) 32...Valve member 32a...Valve cylinder part 32b...Valve plate 33...Removal prevention cylinder 34...operating member 35...piston guide 36...stem 37: piston; 38: discharge head; 38a: top plate; 38b: mounting cylinder portion 38c: nozzle cylinder; 38d: outer peripheral wall; 38e: inner peripheral wall; 39: discharge port 40: pump adapter; 42: base portion; 43: inner cylinder portion; 44: coupling end portion 45: outer cylinder portion 46: leg body 48: leg support 50: folding piece 52: binding ring B... Binding means C... Coil spring G... Gap P... Liquid introduction passage I... Circumferential line j... Joint T... Cylinder wall U... Communication port V1... First check valve V2... Second check valve 23-06-07

Claims

1. A double-layered container (1) has a neck (6) extending upright from a body (4), and is formed by disposing an inner container (1b) capable of reducing its volume by applying negative pressure inside an outer container (1a) which is an outer shell. a discharge pump (10) which is removably attached to the neck portion (6) and has a suction port (28) at the lower end of a cylinder (20) inserted inside the neck portion (6) and a discharge port (39) at a discharge head (38) arranged above the neck portion (6) so as to be capable of ascending and descending, and which has a connecting portion (30) extending downward from the periphery of the suction port (28); a pump adapter (40) connected to the connecting portion (30) and having a leg body (46) extending from the connecting portion (30) toward the bottom (2) side of the double container body (1), with a liquid introduction path (P) formed inside the leg body (46) to the suction port (28); It is equipped with The leg body (46) has elasticity and is formed so as to deform into a shape bulging outwardly to the side by hitting against the bottom part (2) when the discharge pump (10) is attached to the mouth and neck part (6); A double container with a pump, characterized in that a reduction in the internal pressure of the double container body (1) causes the inner container (1b) to cling to at least the outer surface of the leg body (46) in the above-mentioned bulged form, and by removing the discharge pump (10) from the mouth and neck portion (6), the bulged state of the leg body (46) is eliminated, so that the outer surface of the leg body (46) and the inner container (1b) are separated.

2. 2. The double container with pump according to claim 1, wherein the leg body (46) is composed of a plurality of leg supports (48) arranged at a distance from each other along an imaginary circumferential line (I) when viewed from below, and a vertically elongated communication port (U) is formed between adjacent leg supports (48) for communicating the outside of the leg body (46) with the liquid introduction path (P).

3. 3. The double container with pump according to claim 2, further comprising a fastening means (B) for fastening the lower portions of the plurality of leg supports (48) to each other.

4. The pump-equipped double container according to claim 2 or 3, characterized in that the leg support (48) is formed in a vertically long plate-like portion and has an arc-shaped cross-sectional shape that is convex outwardly to the sides over the entire longitudinal length.

Images