JPH09142517A - Pumping device for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a content-filled sealed bag which shrinks according to a reduced internal pressure with contents taken out from tightly sticking to a sucking part so as to prevent the contents from remaining to be unusable. SOLUTION: This pumping drive is used while being stuck to a container receiving a flexible content-filled sealed bag inside and includes a working part exposed outside the container and a sucking part inserted into the content- filled sealed bag for sucking contents from a suction port. In this case, a gap holding lever 20 whose base end is fitted into the suction port 17 of the sucking part and whose tip extends toward an inner bottom of the sealed bag is provided, while on an outer peripheral face of the lever 20 protrusions and recesses which extend from the base of the lever 20 toward its tip are alternately provided along a peripheral direction, and grooves extending toward the suction port 17 are formed on an outer peripheral face of the sucking part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container pump device, and more particularly to a container pump device capable of pouring out the entire amount of the content to the end.

[0002]

2. Description of the Related Art Generally, a container shown in FIG. 11 is known as a container for discharging a fixed amount of contents which have a high viscosity or are deteriorated due to contact with the outside air.

The container 1 has a flexible contents-filling airtight bag 2 housed therein and a mouth tube 3 having a pump 4. The pump 4 is provided with an operating part 5 exposed to the outside of the container 1 and a suction part 6 inserted into the sealed bag 2. The suction part 6 is in the shape of a pipe, the tip of the suction part 6 opens as a suction port 6 a, and extends near the bottom of the closed bag 2.

In this container 1, after moving the operating part 5 downward,
When this operating part 5 is raised by spring back,
The inside of the suction section 6 becomes negative pressure, and the contents 7 in the closed bag 2 are sucked up into the pump through the suction port 6a. When the operating part 5 is moved downward again, the contents sucked up in the pump are discharged from the discharge port 5a provided in the operating part 5. By sequentially sucking up in this manner, the contents 7 in the closed bag 2 can be poured out until there is no more.

[0005]

However, in the above-mentioned conventional one, there is no problem at the beginning of use,
When the content 7 is reduced, the airtight bag 2 comes into close contact with the suction section 6, the suction port 6a of the suction section 6 is closed, and the content 7 cannot be suctioned. Therefore, there is a problem that the pump cannot be completely restored and the content 7 remains.

The close contact of the airtight bag 2 with the suction part 6 prevents the contents 7 on the upper part of the airtight bag 2 from flowing to the suction port 6a of the suction part 6, and also the bottom part of the airtight bag 6 together. The content 7 stays at the top due to the extreme squeezing of the. Thus, it is uneconomical for the contents 7 to remain on the upper portion of the closed bag 2.

The present invention has been made in view of the above problems of the prior art, and prevents the airtight bag from blocking the suction port so that the contents can be smoothly and surely poured out. Moreover, it is an object of the present invention to provide a container pump device capable of pouring out the entire amount of the content and having excellent productivity.

[0008]

The present invention adopts the following means in order to solve the above problems. <Summary of the present invention> That is, the container pump device of the present invention is used by being attached to a container having a contents-filling sealed bag that shrinks with internal negative pressure caused by taking out the contents,
In a container pump device including an operating unit exposed to the outside of the container and a suction unit that is inserted into the container and sucks contents from a suction port, a proximal end of the suction port of the suction unit (1
7) is provided with a gap retaining rod (20) whose inner end is extended toward the inner bottom portion of the content-filling airtight bag (2), and the gap retaining rod (20) is provided.
On the outer peripheral surface of (20), convex portions (21) and concave portions (22) extending from the base end side of the gap maintaining rod (20) toward the distal end side are alternately provided in the circumferential direction, and the outer peripheral surface of the suction portion. And forming a groove extending in a direction approaching the suction port. The shape of this groove is not particularly limited.

<Operation of the Present Invention> In a laminated container or the like, when the inside of the container is decompressed as the contents are poured out, the innermost layer is pulled by a negative pressure and separated from the outer layer, and the inner layer Only the bag becomes a bag and shrinks and deforms, but even if the contents-filling sealed bag comes into close contact with the suction part and the contents stay above the close part, the groove provided on the outer peripheral surface of the suction part Secured as a passage for goods. Therefore, the contents remaining above the contents-filling sealed bag also flow into the suction port. As a result, almost the entire content can be poured out to the end.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, the pump device 4 is used by being attached to the mouth tube portion 3 of the container 1. A flexible contents-filling closed bag (hereinafter referred to as a closed bag) 2 is accommodated inside the container 1, and the contents 7 are filled in the closed bag 2.

The pump device 4 comprises an operating part 5 having an upper end exposed to the outside of the container 1, and a suction part 6 having most of the part except the upper end inserted into the sealed bag 2. The suction part 6 is composed of a connecting part 8 exposed from the container 1 and a tubular part 9 fixed to the connecting part 8.

The suction part 6 includes a flange part 10 and a container 1.
The packing 30 is interposed between the mouth tube portion 3 and the mouth tube portion 3, and the cap 31 is fixed to the container 1 by screwing the cap 31 onto the mouth tube portion 3 from above the flange portion 10.

As shown in FIG. 3, the lower side of the flange portion 10 has a diameter gradually decreasing from the first cylinder portion 13a, second cylinder portion 13b, third cylinder portion 13c, fourth cylinder portion 13d, and fourth cylinder portion 13d. 5 tube parts 1
3e, a sixth tubular portion 13f, and a border between the second tubular portion 13b and the third tubular portion 13c, a border between the fourth tubular portion 13d and the fifth tubular portion 13e,
Steps 14a, 14b, and 14c are formed at the boundaries between the fifth cylinder portion 13e and the sixth cylinder portion 13f, respectively.

FIG. 4, FIG. 5, FIG. 6, and FIG.
It is an expanded transverse cross-sectional view of the cylinder part 13b, the 4th cylinder part 13d, the 5th cylinder part 13e, and the 6th cylinder part 13f, and the 2nd cylinder part 13b and the 4th cylinder part.
On each outer peripheral surface of the tubular portion 13d, the fifth tubular portion 13e, and the sixth tubular portion 13f, the convex portion 15 extending along the axis of the lower tubular portion 12 is provided.
a, 15b, 15c, 15d and grooves 16a, 16b, 16
c and 16d are formed alternately in the circumferential direction.

These protrusions 15a to 15d and the grooves 16a to
The number and size of 16d are such that the contents flow at a predetermined flow rate in the liquid passage formed between each groove 16a to 16d and the sealing bag 2 even when the sealing bag 2 is in close contact with the tubular portion 9. It is set.

Further, as will be described later, the inner surface of the first tubular portion 13b becomes the sliding surface of the piston packing 34, but the first tubular portion 1
By forming a large number of fine protrusions 15a and grooves 16a on the outer peripheral surface of 3b, so-called "sinking" at the time of molding does not occur on the inner surface of the first cylindrical portion 13b, and the piston packing 34 is in a liquid-tight state. Will be ensured. Therefore, this pump device 4 has high pump efficiency.

If a sink mark is formed on the inner surface of the first tubular portion 13b, a gap is created between the inner surface of the first tubular portion 13b and the piston packing 34, and a sufficient negative pressure necessary for suction is obtained. Transmission is compromised, resulting in poor pump efficiency.

A suction port 17 is opened at the lower end of the sixth cylindrical portion 13f, and the contents 7 in the sealed bag 2 are opened from this suction port 17.
Is sucked up by the pump device. The operating unit 5 of the pump device 4 includes a head unit 32 having a discharge port 32 a and a piston 33 that is connected to the head unit 32 and moves up and down in the suction unit 6. The piston 33 has a cylindrical shape with a bottom, and the inside is a liquid passage, and the head portion 32 is
Of the discharge port 32a.

A piston packing 34 is slidably provided between the piston 33 and the inner surface of the second tubular portion 13b, and the head portion 32, the piston 33 and the piston packing 34 are placed between the tubular portion 9. It is elastically biased upward by a spring 35 provided in the.

FIG. 1 shows a state in which the head portion 32 is screwed into the connecting portion 8 to make the piston 33 immovable.
When the screw engagement between the head portion 32 and the connecting portion 8 is released, the head portion 32, the piston 33, and the piston packing 34 are lifted upward by the spring force of the spring 35, and the head portion 32 is indicated by a two-dot chain line in FIG. become.

A ball 36 for opening and closing the valve seat opening 19 is housed in the lower portion of the cylindrical portion 9. A liquid passage 37 is formed between the piston 33 and the inner surface of the second cylindrical portion 13b at the outer edge portion of the bottom face, and a liquid passage hole 38 is provided in a portion of the piston 33 located above the liquid passage 37. ing.

In the pump device 4, when the head portion 32, the piston 33 and the piston packing 34 move upward due to the spring force of the spring 35, the piston packing 34 rises while blocking the liquid passage 37. As a result, the ball 36 is lifted by the negative pressure, the valve seat opening 19 is opened, and the content 7 flows from the suction opening 17 into the primary storage chamber 39 located below the piston 33.

Thereafter, when the head portion 32, the piston 33 and the piston packing 34 are pushed downward against the spring force of the spring 35, the ball 36 closes the valve seat opening 19 and the piston packing 34 of the piston 33 moves. The liquid passage 37 is opened apart from the bottom portion. As a result, the internal solution flows from the primary storage chamber 39 through the liquid passage 37, the liquid passage hole 38, and the piston 33 into the head portion 32.
Is discharged from the discharge port 32a.

Further, the base end of the gap holding rod 20 is fixed by being fitted in the sixth cylindrical portion 13f from the suction port 17. The gap maintaining rod 20 has a rod shape and is formed in the same cross-sectional shape over the entire length thereof.

The outer diameter of the circumscribed circle of the cross-sectional shape is
The diameter is slightly smaller than the inner diameter of the suction port 17, and the sixth tubular portion 1
It is formed to have a diameter slightly larger than the inner diameter of the retaining protrusion 18 provided on the inner peripheral surface of 3f, and when the base end of the gap retaining rod 20 is inserted into the suction port 17, the retaining protrusion 18 is tightly fitted inside. And then fixed.

The tip of the gap holding rod 20 extends toward the bottom of the container 1, that is, the bottom of the closed bag 2. In this pump device 4, the amount of the contents 7 decreases, and the sealing bag 2 adheres to the gap maintaining rod 20 and the sealing bag 2 to the convex portions 21 of the gap maintaining rod 20 but not to the concave portions 22. The concave portion 22 is secured as a passage for the contents 7. The suction port 17 is also held in the open state by the gap holding rod 20.

FIGS. 8, 9 and 10 are enlarged cross-sectional views of the gap holding rod 20. The gap maintaining rod 20 of the present embodiment is configured such that the convex portions and the concave portions extending in the longitudinal direction are provided alternately in the circumferential direction over the entire length thereof. FIG. 8 shows an example of a gap holding rod having three convex portions and three concave portions, FIG. 9 shows four convex portions and four concave portions, and FIG. 10 shows an example of a gap maintaining rod having four convex portions and four concave portions.

As described above, a passage is secured for the contents accumulated below the suction port 17 by the action of the gap maintaining rod 20, while the sealing bag 2 is in close contact with the suction portion 6 so as to be in close contact therewith. In order to cope with the fact that the contents 7 stay above the portion, in this embodiment, since the convex portions 15a to 15d and the concave portions 16a to 16d are provided on the outer peripheral surface of the suction portion 6, the concave portions 16a to 16d is secured as a passage for the contents 7. Therefore, the contents 7 remaining above the closed bag 2 also flow into the suction port 17.

Therefore, even when the amount of the contents 7 becomes small, the contents 7 can be surely sucked, and the ascending / returning operation of the operating portion 5 can be surely performed. Further, this pump device is laminated. It is also possible to use it for a container. The laminated container refers to a laminated blow plastic container having at least a two-layer structure in which the innermost layer is peelable from the outer layer and the appearance shape is prevented from changing.

In the laminated container, when the inside of the container is decompressed as the contents are poured out, the innermost layer is pulled by a negative pressure and separated from the outer layer, and only the innermost layer becomes a bag and shrinks. Deform. In this laminated container, the innermost layer corresponds to the closed bag 2 in the above-mentioned embodiment.

[0031]

As described above, according to the present invention,
Even if the contents-filling airtight bag that shrinks due to internal negative pressure caused by taking out the contents comes into close contact with the suction part, a passage for the contents can be secured, preventing the contents from staying above the close contact part. Therefore, the content can be smoothly and reliably poured out, and the excellent effect that the content is less likely to remain and become unusable is achieved.

[Brief description of the drawings]

FIG. 1 is an assembly external view of a suction unit of a pump device according to a first embodiment of the present invention.

FIG. 2 is an assembly external view showing a state in which the pump device of the first embodiment is attached to a container.

FIG. 3 is an enlarged vertical cross-sectional view of a main part of a suction section of the pump device according to the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a sectional view taken along the line CC of FIG. 3;

FIG. 7 is a sectional view taken along line DD of FIG. 3;

FIG. 8 is a cross-sectional view of the gap maintaining rod according to the first embodiment. It is an EE expanded sectional view of FIG.

FIG. 9 is a cross-sectional view of a gap maintaining rod according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a gap maintaining rod according to another embodiment of the present invention.

FIG. 11 is an external view of an assembly of a conventional pump device and a container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Contents-filling airtight bag 4 Pump device 5 Operating part 6 Suction part 7 Contents 16a, 16b, 16c, 16d Groove 17 Suction port 19 Valve seat port 20 Gap holding rod

Claims (1)

[Claims] 1. An operating part (5), which is used by being attached to a container having a contents-filling sealed bag that contracts due to internal negative pressure caused by taking out contents, and which is exposed to the outside of the container (1),
In a container pump device having a suction part which is inserted into the container and sucks contents from a suction port (17), a base end is fitted into the suction port (17) of the suction part and a tip end is the above-mentioned contents. Gap holding rod extending toward the inner bottom of the object-filling sealed bag (2)
(20), and on the outer peripheral surface of the gap maintaining rod (20), a convex portion (21) extending from the base end side of the gap maintaining rod (20) toward the distal end side.
And concave portions (22) are alternately provided in the circumferential direction, and a groove extending in a direction approaching the suction port (17) is provided on the outer peripheral surface of the suction portion (6).
(16a, 16b, 16c, 16d) is formed, The pump device for containers characterized by the above-mentioned.