JPH09328177A - Pumping device for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a hermetically sealed bag from closing the recessed parts of a space-retaining body and smoothly and securely discharge the contents, by alternately and peripherally providing protrusions and recessions twisted from the base end toward the front end, at the outer peripheral face of the space-retaining body. SOLUTION: This pumping device is provided with an actuation part of which upper end is exposed to the outside of a container and a suction part inserted in the inner container with the exception of the upper end. A space- retaining body 57 is fitted to the suction opening. Protrusions 87a-87d and recessions 89a-89d twisted from the base end side to the front end side, are alternately and peripherally provided at the outer peripheral face of the space- retaining body 57. In this way, the suction opening can be always kept open to secure the passage of the contents and completely and securely discharge the whole quantity thereof.

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 almost the entire amount of contents to the end.

[0002]

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

The container 1 has a flexible contents-filling airtight bag (hereinafter referred to as an airtight bag) 3 housed therein, and a mouth tube 5 having a pump 7. The pump 7 is provided with an operating part 9 exposed to the outside of the container 1 and a suction part 11 inserted into the sealing bag 3. The suction part 11 includes a connecting part 13 exposed from the container 1 and a connecting part 1.
It is composed of a tubular portion 15 fixed to 3.

A suction port 17 is opened at the lower end of the tubular portion 15, and as shown in FIG.
The base end 19a of the gap holder 19 having a cross-shaped cross section is fitted. In this container 1, after pushing down the operating portion 9,
When it is lifted by spring back, the inside of the suction portion 11 becomes a negative pressure, and the contents 21 in the closed bag 3 are sucked up from the suction port 17. When the operating part 9 is pushed down again,
Discharge port 2 in which suctioned contents 21 are provided in operating part 9
It is supposed to be poured out from 3. If the contents 21 in the closed bag 3 are exhausted by sequentially sucking the contents up in this way, the contents can be poured out.

[0005]

However, in the above-mentioned conventional one, there is no problem at the beginning of use,
When the content 21 becomes small and the sealing bag 3 comes into close contact with the gap holder 19 having a cross-shaped cross section, that is, as shown in FIG. 13, the sealing bag 3 has the convex portions 25 a, 25 of the gap holder 19.
b, 25c, 25d and recesses 27a, 27b, 27c, 2
When it comes into close contact with 7d, the passage of the contents 21 is closed and the contents 21 cannot be sucked. Therefore, the pump 7 cannot be completely restored, and there is a problem that the content 21 remains.

If the contraction of the airtight bag 3 is uneven and unevenly contracted, the airtight bag 3 comes into contact with a part of the gap holder 19 so that the air gap holder 19 is inclined and the airtight bag 3 is completely shrunk. In some cases, the contents 21 could not be formed and remained. Therefore, there is a problem that a mechanism for supporting the bottom of the gap holder 19 must be added.

Further, in order to improve the rigidity so that the gap holder 19 does not tilt obliquely, there is a gap holder provided with a bulged end portion that spreads to the left and right of the tip of each convex portion having a cross-shaped cross section. There was also the problem that

The present invention has been made in view of the above problems of the prior art, and prevents the airtight bag from closing the concave portion of the gap holder to smoothly and surely pour out the contents. It is an object of the present invention to provide a container pump device which is capable of pouring out the entire amount of the content and has excellent productivity.

[0009]

The present invention adopts the following means in order to solve the above problems. The points of the present invention will be briefly described below.

(1) The present invention is used for a container provided with an outer container for holding the outer shape of the container and an inner container for containing the contents inside the outer container, and the operation is exposed to the outside of the container. And a suction unit that is inserted into the inner container and sucks the contents from the suction port, in a container pump device, the base end of which fits into the suction port of the suction unit and the end of which is inside the inner container. A gap holder extending toward the bottom is provided. On the outer peripheral surface of the gap holder, convex portions and concave portions twisted from the base end side to the tip side of the gap holder are alternately provided in the circumferential direction. It is a pump device for containers characterized in that

When the operating portion is pushed down and then raised by spring back, the inside of the suction portion becomes negative pressure, and the contents in the inner container are sucked up from the suction port. afterwards,
When the operating part is pushed down again, the sucked contents are discharged from the discharge port provided in the operating part. As the inner container is sucked up in this manner, the inner container comes into close contact with the convex portion of the gap holder but does not come into close contact with the concave portion, so that the concave portion is secured as a passage for the contents. Therefore, it is possible to surely suck up the contents even when the contents become small.

(2) Here, it is preferable that the container is a container having at least two layers of an outer layer forming the outer container and an inner layer forming the inner container. When the contents are sucked up and reduced, the inner layer separates from the outer layer, and air flows into the separated space through a gap provided in a part of the container, so that the outer layer is formed. It is possible to prevent changes in the outer shape of the container.

The inner layer may not be in close contact with the outer layer, but may be a bag-like sealed container housed inside the outer layer.

(3) Further, the convex portion formed on the outer peripheral surface of the gap holder is twisted to the circumferential position of at least one end of another convex portion having the other end adjacent to one end of the convex portion. Preferably.

With this arrangement, the protrusions can be arranged in the entire circumferential direction in the cross section of the gap retainer, and the passage of the contents can be reliably ensured. Therefore, even if the contents are sucked up and the inner layer separates from the outer layer and comes into close contact with the gap retainer, the close contact portion is always a convex portion and does not adhere to the concave portion, and the content in the inner container does not have a concave portion. It can flow into the suction port through and almost all of the content can be poured out to the end.

It should be noted that the protrusion does not necessarily have to be twisted to the circumferential position of at least one end of another protrusion adjacent to the other end of the protrusion. Further, the sectional shape of the convex portion is not limited to a rectangular shape, and the outermost side of the tip portion of the convex portion may be an arc or a combination of a plurality of straight lines.

(4) For the outer layer of the container used in the present invention, for example, polyethylene can be used, and for the inner layer, for example, ethylene vinyl alcohol copolymer can be used. However, the raw material of the container is not limited to the above example.

The contents poured out in the present invention can be filled with fluid contents (eg, liquid soap, rinse, etc.) in the inner container.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
From now on, it will be explained based on the drawing of FIG. First, a container in which the pump device of the present invention is mounted will be described. Container 2
Reference numeral 9 is made of a resin material, and as shown in FIG. 5, includes a cylindrical housing body portion 31 and a mouth tube portion 33. This mouthpiece 3
3 has an opening 37 for mounting the pump device 35 at its tip, and a screw thread 39 for mounting the pump device 35 is formed on the outer wall surface of the mouth cylinder part 33.

The housing body 31 includes an outer layer 31a and an inner layer 31.
The outer layer 31a constitutes an outer container 32, and the inner layer 31b constitutes an inner container 34. The inner container 34 is in the shape of a flexible bag. Before using the container, the inner container 34 is in close contact with the outer container 32.

As shown in FIG. 9, after the laminated resin is blow-molded on the bottom of the housing body 31, when the blow-molding die is closed, the resin is cut off and simultaneously sealed to release air. A pinch-off 41 is formed to prevent the pinch-off. The pinch-off 41 seals the inner container 34. However, since the outer container 32 is not sealed and is cut off by the mold, a hole is opened in the bottom portion of the outer container 32. Therefore, the boundary between the outer container 32 and the inner container 34 is exposed, and air flows into the space formed between the outer container 32 and the inner container 34 through this boundary.

[First Embodiment] <Overall Outline of Pump Device> As shown in FIG. 5, this pump device 35 is used by being attached to a mouth tube portion 37 of a container 29.

The pump device 35 has a container 29 at the upper end.
Is provided with an operating portion 47 exposed to the outside, and a suction portion 49, most of which is inserted into the inner container 34 except for the upper end portion.

The suction part 49 is composed of a connecting part 51 exposed from the container 29 and a cylindrical part 53 fixed to the connecting part 51. A suction port 55 is opened at the bottom of the suction section 49. The base end 57a of the gap holder 57 is fitted into the suction port 55.

<Details of Each Part> Each part will be described in detail below.

<Operating Part> As shown in FIG. 1, the operating part 47 of the pump device 35 includes a head part 59 having a discharge port 59a, and a piston 61 which is connected to the head part 59 and moves up and down in the suction part 49. It consists of and. The piston 61 has a cylindrical shape with a bottom, and the inside thereof is a liquid passage and communicates with the discharge port 59 a of the head portion 59.

<Suction Part> As shown in FIGS. 1 and 5, the suction part 49 has a packing 65 interposed between the flange part 63 and the mouth tube part 33 of the container 29, and the flange part 63 is provided.
It is fixed to the container 29 by screwing the cap 67 onto the mouth tube portion 33 from above.

The lower side of the flange portion 63 is, in order from the top, the first tubular portion 53a, the second tubular portion 53b, the third tubular portion 53c, and the fourth tubular portion 53c.
It is a cylinder portion 53d, a fifth cylinder portion 53e, and a sixth cylinder portion 53f, and is a boundary between the second cylinder portion 53b and the third cylinder portion 53c, a boundary between the fourth cylinder portion 53d and the fifth cylinder portion 53e, and a fifth cylinder portion. Steps 69a, 69b, 69 are provided at the boundaries between the tubular portion 53e and the sixth tubular portion 53f, respectively.
c is formed.

3 (A), (B), (C), and (d) are enlarged cross-sections of the second tubular portion 53b, the fourth tubular portion 53d, the fifth tubular portion 53e, and the sixth tubular portion 53f, respectively. It is a plan view and the second
On the outer peripheral surfaces of the tubular portion 53b, the fourth tubular portion 53d, the fifth tubular portion 53e, and the sixth tubular portion 53f, the convex portions 71a, 71b, 71c, 71d and the concave portions (grooves) extending along the axis of the tubular portion 53 are formed. ) 7
3a, 73b, 73c, 73d are formed alternately in the circumferential direction.

These convex portions 71a to 71d and concave portion 73a
The number and the dimensions of 73d to 73d are such that the contents 45 flow at a predetermined flow rate in the liquid passage formed between the recesses 73a to 73d and the inner container 34 even when the inner container 34 is in close contact with the cylindrical portion 53. It is set.

As will be described later, the inner surface of the second cylinder portion 53b serves as a sliding surface for the piston packing 75, but the outer peripheral surface of the second cylinder portion 53b has a large number of fine projections 71a and recesses 73.
By forming a, the so-called "sink" at the time of molding does not occur on the inner surface of the second tubular portion 53b, and the sliding of the piston packing 75 in a liquid-tight state is secured. Therefore, the pump device 35 has high pump efficiency.

If a sink mark is formed on the inner surface of the second tubular portion 53b, a gap is created between the inner surface of the second tubular portion 53b and the piston packing 75, resulting in poor pump efficiency.
The suction port 55 is opened at the lower end of the sixth tubular portion 53f, and the contents 45 in the inner container 34 are sucked up by the pump device 35 from the suction port 55.

A piston packing 75 is slidably provided between the piston 61 and the inner surface of the second tubular portion 53b, and the head portion 59, the piston 61 and the piston packing 75 are placed between the tubular portion 53. Is elastically biased upward by a spring 77 provided in the.

FIG. 1 shows a state in which the head portion 59 is screwed into the connecting portion 51 to make the piston 61 immovable, but when the screwing of the head portion 59 and the connecting portion 51 is released,
The head portion 59, the piston 61, and the piston packing 75 are lifted upward by the spring force of the spring 77,
The head portion 59 moves above the connecting portion 51, as shown in FIG.

A ball check 81 for opening and closing the valve seat port 79 is housed in the lower portion of the cylindrical portion 53. Piston 61
A liquid passage 83 is formed at the outer peripheral portion of the bottom surface of the second tubular portion 53b, and the liquid passage 83 is formed in the piston 61.
A liquid passage hole 85 is provided in a portion positioned higher than 3.

The base end 57a of the gap holder 57 is inserted into the suction port 55 opened at the lower end of the sixth cylinder portion 53f, and the gap holder 57 is fitted in the sixth cylinder portion 53f. As shown in FIG. 4, the gap holder 57 has a rod shape, and the outer peripheral surface thereof has a base end 57 a to a tip end 57 of the gap holder 57.
convex parts 87a, 87b, 87c twisted toward b,
87d and recesses 89a, 89b, 89c, 89d are provided alternately in the circumferential direction. The cross-sectional shape of the gap retainer 57 is substantially a “ten” shape, and the center of the “ten” shape is the suction portion 4.
It coincides with the center of the tubular portion 53 of 9.

That is, the gap retainer 57 has four convex portions 87a, 87b, 8 twisted in the longitudinal direction over the entire length thereof.
7c, 87d and four recesses 89a, 89b, 89c,
89d, the protrusions 87a, 87b, 87c, 87d are wound in a counterclockwise direction from the upper part to the lower part of the gap retainer 57, and the number of protrusions is three. Therefore, the protrusions 87a, 87b, 87 must be provided in the circumferential direction of the gap holder 57.
c and 87d are present.

The winding direction of the gap holder 57 is not limited to the counterclockwise direction but may be the clockwise direction. Also, the number of threads of the convex portion is not limited to three.

Further, the outer diameter of the circumscribed circle having the shape of "10" is slightly smaller than the inner diameter of the suction port 55, and is provided on the inner peripheral surface of the sixth cylindrical portion 53f as shown in FIG. The retaining protrusion 91 is formed to have a diameter slightly larger than the inner diameter of the retaining protrusion 91 so that when the base end 57a of the gap holder 57 is inserted into the suction port 55, the retaining protrusion 91 and the retaining protrusion 91 are fitted and fixed. Has become.

<Operation of Pump Device> Next, the operation of the pump device 35 having the above-described structure will be described with reference to FIGS. 1, 5, 5, 6, 7 and 8.

Using this pump device 35, the inner container 34
To pour out the contents 45 contained in the inside,
The head portion 59 is rotated with respect to the connecting portion 51.
The screwing between 9 and the connecting portion 51 is released to make the piston 61 movable. The head portion 59, the piston 61, and the piston packing 75 move upward by the spring force of the spring 77, and as shown in FIG. 5, the operating portion 47 stops above the connecting portion 51 with a certain space.

Thereafter, after the operating portion 47 which has moved upward is pushed down, the head portion 59, the piston 61 and the piston packing 75 move upward due to the spring force of the spring 77, and the piston packing 75 and the liquid passage 83 also move.
Ascend while blocking. As a result, the ball check 81
Is lifted by the negative pressure, the valve seat opening 79 is opened, and the content 45 flows from the suction opening 55 into the primary storage chamber 93 located below the piston 61.

Thereafter, when the head portion 59, the piston 61 and the piston packing 75 are pushed downward against the spring force of the spring 77, the ball check 81 causes the valve seat port 79 to open.
And the piston packing 75 separates from the bottom surface of the piston 61 to open the liquid passage 83. As a result, the internal melt 45 flows from the primary storage chamber 93 into the piston 61 through the liquid passage 83, and the discharge port 59 of the head portion 59.
It is poured out from a.

Contents 45 contained in the inner container 34
Is initially contained in the inner container 34 in a filled state, and the inner container 34 is in close contact with the outer container 32. After that, when the content 45 is poured out using the pump device 35, the inner container 34 peels from the outer container 32 and contracts at the bottom of the container 29, as shown in FIG. At the same time, air flows into the space between the inner container 34 and the outer container 32 as indicated by the arrow through the pinch-off 41 formed on the bottom of the container 29. Due to this inflow of air, the outer container 3
It is possible to prevent the deformation of the external appearance shape of item 2.

When the contents 45 are further poured out, the inner container 34 is further separated from the outer container 32 and contracts as shown in FIG. 6, and the inner container 34 is moved to the suction part as shown in FIG. 49 and the gap holder 57.

FIG. 8 is a transverse sectional view showing the inner container 34 in close contact with the outer periphery of the gap holder 57. Since the convex portions 87a, 87b, 87c, 87d of the gap retainer 57 are twisted from the upper portion to the lower portion, the gap retainer 57 is formed.
In the circumferential direction of the projections 87a, 87b, 87c, 8
There is 7d. Accordingly, when the inner container 34 contracts, the inner container 34 comes into contact with the convex portions 87a, 87b, 87c, 87d and the concave portion 89.
The concave portions 89a, 89b, 89c, 89d are secured as passages for the contents 45 without being in close contact with the a, 89b, 89c, 89d.

Further, since the gap retainer 57 has a twisted structure of a rod-shaped member having a cross-shaped cross section.
The weight is reduced as compared with the conventional gap retainer provided with the bulged end portions that spread to the left and right of the tip of each cross-shaped convex portion. Further, the protrusions 87a, 87b, 87 must be provided in the circumferential direction of the gap holder 57 without fail.
Since c and 87d are present, the bending rigidity of the gap holder 57 is improved.

[Second Embodiment] Next, a second embodiment of the container pump device 35 according to the present invention will be described with reference to FIG. FIG. 10 shows a perspective view of the gap holding member 95 in the second embodiment.

The gap holding member 95 of the second embodiment is rod-shaped, and has a structure in which one rectangular plate is twisted from the base end side 95a to the tip end side 95b of the gap holding member 95. ing. The gap holder 95 has convex portions 97a and 97b.
And concave portions 99a and 99b are alternately provided in the circumferential direction. The cross-sectional shape of the gap holding member 95 is substantially "-" shaped, and the center of the "-" character coincides with the center of the cylindrical portion 53 of the suction portion 49.

That is, the gap holder 95 has two convex portions 97a and 97b twisted in the longitudinal direction over the entire length thereof,
It has two concave portions 99a and 99b, and these convex portions 97a and 9b
The winding direction of 7b is counterclockwise toward the longitudinal direction of the gap holding member 95, and the number of protrusions is 2. Therefore, the protrusions 97a and 97b always exist in the circumferential direction of the gap holder 95.

The winding direction of the gap holding member 95 is not limited to the counterclockwise direction but may be the clockwise direction. Further, the number of threads of the convex portion is not limited to two.

Further, the outer diameter of the circumscribing circle having the character "-" is slightly smaller than the inner diameter of the suction port 55, and is provided on the inner peripheral surface of the sixth cylindrical portion 53f as shown in FIG. The retaining projection 91 is formed to have a diameter slightly larger than the inner diameter of the retaining projection 91, so that when the base end 95a of the gap holder 95 is inserted into the suction port 55, the retaining projection 91 and the retaining projection 91 are fitted and fixed. Has become.

In the present invention, the two convex portions 97a and 97b are used.
Although the angle formed by is about 180 degrees, the angle is not limited to this and may be an acute angle or an obtuse angle. Since the present invention has a simple structure, it is possible to improve productivity and reduce production cost.

[0054]

As described above, according to the present invention,
The suction port is always open by fitting the base end of the gap holder into the suction port and alternately providing convex and concave portions twisted from the base end of the gap holder toward the tip side in the circumferential direction. In addition to maintaining the state, the inner container only adheres to the convex portion of the gap holder and does not adhere to the concave portion even if the inner container comes into close contact with the gap holder, so that the passage of the contents can be secured. It is possible to reliably and reliably pour out the entire amount of the substance until it is almost completely consumed.

Further, after the inner layer is separated from the outer layer due to the decrease in the content, air flows into the separated space through the gap provided in a part of the container, so that the outer shape of the outer container is changed. Can be prevented.

Since the gap retainer has a twisted structure in which a rod-shaped member having a cross-shaped cross section is twisted, as compared with the gap retainer provided with bulging end portions that spread to the left and right of the tip of each cross-shaped convex portion. As a result, the weight is reduced, and since the convex portion is always present in the circumferential direction of the gap holder, the bending rigidity of the gap holder can be improved.

[Brief description of drawings]

FIG. 1 is an assembly external view of a working unit, a suction unit, and a gap holder of a pump device used in a first embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of a main part of a suction section of a pump device used in the first embodiment of the present invention.

3A, 3B, 3C, and 3D are cross-sectional views taken along line AA, BB, CC, and D of FIG. 2, respectively.
It is a -D sectional view.

FIG. 4 is a perspective view showing a gap holder used in the first embodiment of the present invention.

FIG. 5 is a front view showing a state in which the contents are poured out according to the first embodiment of the present invention.

FIG. 6 is a front view showing a state in which the contents are further poured out according to the first embodiment of the present invention.

FIG. 7 is a front view showing a state in which almost all the contents are poured out according to the first embodiment of the present invention.

FIG. 8 is a transverse cross-sectional view of the gap retainer with which the inner container is in close contact with the first embodiment of the present invention.

FIG. 9 is a bottom view of the container used in the first embodiment of the present invention.

FIG. 10 is a perspective view showing a gap holder used in a second embodiment of the present invention.

FIG. 11 is an assembly external view of a container equipped with a pump device having a gap holder according to the related art.

FIG. 12 is a perspective view of a gap holder according to a conventional technique.

FIG. 13 is a transverse cross-sectional view of a gap holder in which a hermetically sealed bag is in close contact with the related art.

[Explanation of symbols]

 29 container 31a outer layer 31b inner layer 32 outer container 34 inner container 35 pump device 45 contents 47 working part 49 suction part 55 suction port 57 gap holder 57a base end 57b tip part 87a, 87b, 87c, 87d convex part 89a, 89b, 89c, 89d recess

Claims (3)

[Claims] 1. An operating part, which is used for a container provided with an outer container for holding an external shape of the container and an inner container for containing contents inside the outer container, and which is exposed to the outside of the container; In a container pump device having a suction part that is inserted into a container and sucks contents from a suction port, a base end is fitted into the suction port of the suction part, and a tip end extends toward an inner bottom part of the inner container. A gap holding body is provided, and on the outer peripheral surface of the gap holding body, convex portions and concave portions twisted from the base end side to the tip side of the gap holding body are alternately provided in the circumferential direction. Pump device for containers. 2. The container pump device according to claim 1, wherein the container is a container including at least two layers of an outer layer forming the outer container and an inner layer forming the inner container. 3. The protrusion formed on the outer peripheral surface of the gap retainer is twisted to the circumferential position of at least one end of another protrusion adjacent to the other end with respect to one end of the protrusion. The pump device for a container according to claim 1.