JPH0223300Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a synthetic resin infusion container for storing and holding infusions such as glucose solution, physiological saline, Ringer's, etc.

[Prior Art] In recent years, synthetic resin infusion containers have become widespread.

Synthetic resin infusion containers were proposed to solve the problems of glass infusion containers. In other words, in addition to problems with drop strength and container weight, glass infusion containers also have serious handling problems, such as the need for a ventilation needle for air displacement when using the contents, which is cumbersome to handle. In addition to the above problem, there was a sanitary problem in that dust, pollutants, bacteria, etc. contained in the atmosphere flowed into the container due to air replacement and were mixed into the infusion.

Synthetic resin infusion containers have high drop strength and are lightweight, and because they are constructed from flexible materials, the container's outer wall elastically deforms due to negative pressure as the contents are consumed, reducing its diameter and volume. This system eliminates the need for a ventilation needle by discharging the infusion solution while eliminating this negative pressure, thereby solving the problems associated with the glass containers at once.

However, on the other hand, conventional synthetic resin infusion containers
As the infusion is consumed, the container body first elastically deforms from the center and begins to contract in diameter, and then gradually decreases in diameter toward the container base and container shoulder, causing irregular deformation and causing the infusion to deteriorate. The discharge speed becomes uneven, and the volume decreases in proportion to the consumption of the infusion, making it impossible to eliminate the negative pressure inside the container, and it takes some time to discharge the entire amount, or ultimately There has been a problem in that a large volume of infusion fluid may remain inside the container.

In order to solve these problems, the applicant of the present invention previously proposed the technology shown in Utility Model Registration Application No. 164432 of 1981.

This is an infusion container 1 as shown in Figures 4 and 5.
01, it has a container body 102 which is made of a flexible material and whose cross section is a flat figure having a major axis and a minor axis, and the container body 102 has a container body 102 on both sides facing in the direction of the major axis. Ribs 103, 104 forming a pair across the imaginary center line 100 on both sides of the imaginary center line 100 passing through the center of the width of both sides.
is formed in at least a portion of the container in the depth direction, and the paired ribs 103 and 104 extend from near the shoulder and/or bottom of the container body 2 toward the center of the container in the depth direction. It is characterized in that it is configured such that the distance from the virtual center line 100 gradually decreases.

In the infusion container 101 having such a configuration,
Since the deformation of the container occurs along the ribs 103 and 104, irregular deformation of the container is prevented, and unevenness in the discharging speed of the infusion solution is improved. The time required for completion was also significantly reduced (see Figure 6).

[Problems to be solved by the invention] However, the purpose of this invention is not to be satisfied with this, but to provide an infusion container that can further improve the unevenness of the drainage rate and shorten the time required for drainage. .

(b) Structure of the invention [Means for solving the problem] Corresponding to this purpose, the infusion container of this invention is:
The container body is made of a flexible material and has a flat cross section having a major axis and a minor axis. The infusion container is provided with a recess formed in at least a portion in the depth direction of the container, the recess forming a substantially symmetrical shape with respect to an imaginary center line passing through the container, the recess extending from near the shoulder and bottom of the container body to the container. It is characterized in that it is configured to have a contour in which the distance from the virtual center line gradually decreases toward the center in the depth direction.

The details of this invention will be explained below with reference to the drawings showing one embodiment.

In FIGS. 1 and 2, 1 is an infusion container. The infusion container 1 is a transparent or translucent hollow bottle made of a flexible material such as polypropylene, polyethylene, polyvinyl chloride, etc., and includes a body 2, a base 3, a shoulder 4, and a nozzle. 5,
An opening 6 is provided.

The body portion 2 has a cross section having a flat shape having a major axis and a minor axis, for example, a substantially elliptical cylindrical shape that is horizontally and vertically symmetrical. The bottom of the body part 2 is closed by a base part 3, and above the body part 2 there is a shoulder part 4 with a sharply reduced diameter. An opening 6 is continuously formed at the upper end of the nozzle part.

The opening 6 is for airtightly attaching a stopper having a rubber stopper and inserting a hollow needle therein to take out the contents.

Parting lines 7 and 8 of the container 1 are located on both side faces facing each other in the direction of the major axis of the body 2, passing through the center of the width of both side faces, and these parting lines 7 and 8 are Body part 2a and back body part 2b
It forms the boundary between On both sides of the parting line 7, concave portions 11 are formed which draw a polygon ABCDEC that is symmetrical about the parting line 7 as a center line in plan view.

That is, the side surface of the infusion container 1 is a curved surface as a whole, so the shape ABCDEC is not a straight shape,
It is a spatial figure that is symmetrical with respect to the plane α connecting the parting lines 7 and 8, and appears to be a polygon when viewed from the side in plan. Polygon ABCDEC is 2
Two congruent isosceles triangles ABC and CEC are connected at C, and BCE and ACD form a straight line and intersect in an X shape.

Here, points A and B are directly below the shoulder 4, and points D and E
is located directly above the base, and point C is located on the parting line 7 at the center of the infusion container 1 in the depth direction. Therefore, the outline of the recessed portion 11 extends from the vicinity of the shoulder to the depth. The distance from the parting line 7 gradually decreases toward the center in the width direction and from near the bottom toward the center in the depth direction.

The depth of the concave portion 11 can be, for example, approximately 1 mm in the infusion container 1 having a volume (at the time of overflow) of 820 ml.

Although the concave portion 11 is recessed from the other portions in this way, its surface is not a uniformly curved surface, and the portion 12 that spans the band-like portion of width W centered on the parting line 7 is a flat surface. The portion 12 serves as a contact surface with an adjacent container when moving on a belt conveyor, etc., and prevents the container from deviating from the direction of travel.

Similarly, concave portions 13 are formed on both sides of the parting line 8.

On the bottom surface of the base 3, a portion 3c along the long axis rises toward the center of the container, and portions 3a and 3b on both sides of the portion 3c serve as legs for grounding.

[Function] After filling the infusion container 1 constructed in this manner with an infusion solution, a stopper having a rubber stopper is attached airtightly, a hollow needle is inserted through the rubber stopper to penetrate the inside and outside of the container, and the container is turned upside down. When held in this position, infusion fluid is expelled through the hollow needle.

As the internal volume of the infusion container 1 decreases accordingly, the container wall deforms inward, but this deformation causes the recesses 11 near the parting lines 7 and 8
13, and first move to the outside of the X, that is, the front body part 2a and the central part 20 of the back body part.
This occurs in such a way that a and 20b are deformed inward.

Since this part has a large surface area, as this part deforms inward, the infusion fluid is discharged smoothly and at a high speed without causing any irregular deformation of the container such as twisting or folding.
a and 20b approach each other from the center and deform into flat shapes.

As the portions 20a and 20b progress toward each other, the base portion 3 also folds into two at the rising portion of the portion 3c along the long axis of the bottom, and the portions 3a and 3b on both sides thereof approach each other. This results in part 20
a and 20b can be sufficiently approached, and the shoulder portion 4 is also guided by the deformation along the concave portion of the body portion 2 and deforms into a flat shape, and the entire amount of the infusion is discharged. Therefore, the offering is performed at a fast, almost constant speed in a short period of time.

Here, the recessed portions 11 and 13 and the other portions 20a,
The boundary with 20b is 2 with an interval of about 1 mm.
Although it is folded and bent, the resistance to force is small compared to the conventional rib-based boundary which bends four times. Therefore, as the central portion deforms into a flattened shape, the bottom and shoulders deform smoothly, and the entire volume is discharged at a more even rate and in a shorter time than in the conventional infusion container 101.

[Example] The discharge rate ratio (discharge rate ÷ initial discharge rate x 100) of the product of the present invention and the conventional product was measured,
Graphs shown in FIGS. 3 and 6 were obtained.

FIGS. 3 and 6 respectively show the discharge rate rates of two samples of the product of the present invention and three samples of the conventional infusion container 101 filled with water in infusion containers of the same size and shape.

A notable difference can be seen between Figures 3 and 6. In other words, in a container containing 475 c.c., if we look at the portion from the remaining amount of 475 c.c. to 150 c.c., where more than 2/3 of the total amount is discharged, in Figure 6, the moment when it exceeds 100% On the other hand, the discharge rate was somewhat uneven, dropping below 90% at around 200 c.c., whereas Figure 3 shows that the discharge rate remained almost constant and varied from 100% to 95%. It shows that there is almost no unevenness in the discharge speed. Even when the remaining liquid level is less than 150c.c., the discharge speed decreases smoothly.
Overall, it is discharged at a nearly constant rate in a shorter time.

(c) Effects of the invention As is clear from the above explanation, according to this invention, it is possible to obtain an infusion container in which the infusion can be discharged more smoothly and at an almost constant rate in a shorter time.

[Brief explanation of drawings]

FIG. 1 is a side view showing an infusion container according to an embodiment of the invention, FIG. 2 is a front view of the infusion container shown in FIG. 1, and FIG. 3 is a side view of the infusion container shown in FIGS. 1 and 2. A graph showing the relationship between the amount of remaining fluid and the discharge rate. Figure 4 is a side view of a conventional infusion container. Figure 5
The figure is a front view of the infusion container shown in FIG. 4, and FIG. 6 shows the relationship between the amount of remaining liquid and the discharge rate in a conventional infusion container that is the same size and shape as the infusion container shown in FIGS. 1 and 2. It is a graph. 1... Infusion container, 2... Torso, 3... Base, 4
...Shoulder part, 5...Nozzle part, 6...Mouth part, 7...
Parting line, 8... Parting line, 11... Concave portion, 12... Part, 13... Concave portion, 100... Center line, 101... Infusion container,
102... Container body, 103... Rib, 104...
…rib.

Claims (1)

[Scope of utility model registration request] The container body is made of a flexible material and has a flat cross section having a major axis and a minor axis. The infusion container is provided with a recess formed in at least a portion in the depth direction of the container, the recess forming a substantially symmetrical shape with respect to an imaginary center line passing through the container, the recess extending from near the shoulder and bottom of the container body to the container. An infusion container characterized in that it is configured to have a contour in which the distance from the virtual center line gradually decreases toward the center in the depth direction.