WO2015104888A1

WO2015104888A1 - Cap

Info

Publication number: WO2015104888A1
Application number: PCT/JP2014/078914
Authority: WO
Inventors: 立石　勇
Original assignee: 株式会社大塚製薬工場
Priority date: 2014-01-08
Filing date: 2014-10-30
Publication date: 2015-07-16
Also published as: PH12016500907B1; MY177573A; CN105899440A; TW201540290A; PH12016500907A1; JPWO2015104888A1; TWI637741B; CN105899440B; JP6348125B2

Abstract

The present invention provides a cap which is mounted to a container. The cap is provided with: an inner frame member which is formed in a cylindrical shape having an axial first end and an axial second end and which has formed on the second end side a flange section protruding outward radially; an outer frame member which has an axial first end and an axial second end, is formed in a cylindrical shape covered over the outer periphery of the inner frame member, has an outer frame engagement section formed at the first end, and has a cover section formed at the second end and covering the outer periphery of the flange section; and an elastic member which is gripped between the outer frame engagement section of the outer frame member and the first end of the inner frame member and which closes the first end of the inner frame member. The cap is further provided with a weld section where a part of the inner wall surface of the outer frame member and the flange section of the inner frame member are affixed by welding. A gap is formed on the outside radially of the weld section at a position between the cover section of the outer frame member and the flange section of the inner frame member. The gap extends from the weld section and is open axially on the second end side of the outer frame member.

Description

cap

The present invention relates to a cap attached to a container, a container provided with the cap, and a method of manufacturing the cap.

The cap attached to the infusion container has an elastic member such as rubber so that a syringe or catheter needle can be inserted. Various types of such caps have been conventionally proposed. For example, Patent Document 1 discloses an elastic member between an upper end portion of an outer frame member formed in a cylindrical shape and an upper end portion of an inner frame member. A cap having a structure in which the outer peripheral portion of the inner frame member is fitted to the lower end portion of the outer frame member is disclosed. Patent Document 2 discloses a cap having a structure in which an elastic member is fixed to an inner wall surface of a cylindrical frame member, an upper end portion of the frame member is bent inward, and the elastic member is crimped. Furthermore, Patent Document 3 discloses a cap formed by two-color molding of a cylindrical frame member and a thermoplastic elastic member.

However, the caps of the above documents have the following problems. The cap of Patent Document 1 has a structure in which the outer peripheral portion of the inner frame member is simply fitted into the lower end portion of the outer frame member. Therefore, when the dimensional accuracy of both members is poor, the cap is disassembled by the vibration of the conveyance path in the production line. There was a fear. Moreover, since the cap of patent document 2 deform | transforms the upper end part of a frame member and crimps with respect to an elastic member, there existed a problem that manufacture took time and production efficiency was bad. Furthermore, since the frame member and the elastic member are fixed by two-color molding in the cap of Patent Document 3, the fixing strength and compressibility of the elastic member are not high, and there is a problem of liquid leakage.

On the other hand, in Patent Document 4, an elastic member is sandwiched between the lower end portion of the outer frame member formed in a cylindrical shape and the upper end portion of the inner frame member, and the lower end portion of the outer frame member and the inner frame member A cap having a structure in which an upper end portion is fixed by ultrasonic welding is disclosed. The ultrasonic welded portion of the cap is configured to protrude inward in the radial direction while being melted and press the elastic member.

Japanese Utility Model Publication No. 59-169835 Japanese Utility Model Publication No. 3-88535 Japanese Unexamined Patent Publication No. 2000-140068 Japanese Utility Model Publication No. 2-3543

However, in the cap disclosed in Patent Document 4, a portion melted by ultrasonic welding may flow outward in the radial direction and may protrude outside the cap. When such a material protrudes, the outer shape of the cap changes, so that the positioning accuracy when the cap is attached to the container may be reduced.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cap that can prevent the material constituting the cap from protruding outward in the radial direction by welding.

The present invention is a cap attached to a container body, which is formed in a cylindrical shape having a first end and a second end in the axial direction, and protrudes radially outward toward the second end. An inner frame member having a first end portion and a second end portion in the axial direction. The inner frame member is formed in a cylindrical shape that covers the outer periphery of the inner frame member. An outer frame member formed with a cover portion covering the outer periphery of the flange portion at the second end, an outer frame engaging portion of the outer frame member, and an inner frame member An elastic member sandwiched between the first end portion and closing the first end portion of the inner frame member, wherein a part of the inner wall surface of the outer frame member and the flange portion of the inner frame member are It has a welding part fixed by welding, and is between the cover part of the outer frame member, and the flange part of the inner frame member rather than the welding part. In outward, the gap is formed, the gap extends from the welded portion, which is open at the second end portion side of the outer frame member in the axial direction.

According to this configuration, a gap is formed between the flange portion of the inner frame member and the cover portion of the outer frame member. And this clearance gap is open | released from the welding part which fixes an inner frame member and an outer frame member to the 2nd edge part side of the outer frame member in an axial direction. Therefore, even if the material is melted from the welded portion, the material flows into the gap, so that it can be prevented from protruding to the outer periphery of the cap. Moreover, even if the melted material flows out from the gap, the gap is open to the second end portion side of the outer frame member, so that it can be prevented from flowing outward in the radial direction of the cap. Therefore, since the outer diameter of the cap does not change, the cap can be attached to the container with high accuracy.

In the cap, the welded portion can be formed by various methods. For example, it can be formed by ultrasonic welding. Thereby, an ultrasonic wave can be given and fixed in the state which assembled the outer frame member and the inner frame member beforehand.

In each of the caps, the weld portion can be formed by fitting a convex portion or a concave portion formed in the outer frame member and a concave portion or a convex portion formed in the inner frame member. This facilitates positioning when the outer frame member and the inner frame member are assembled.

In each of the caps, the gap can be 0.1 to 1.0 mm. This is because if it is smaller than 0.1 mm, it is difficult for the melted material to flow in. If it is larger than 1.0 mm, an unexpected inconvenience may occur due to a wasteful gap.

In each of the caps described above, a thin film for closing the first end of the inner frame member can be further provided, and the elastic member can be disposed between the thin film and the outer frame engaging portion of the outer frame member. it can. Thereby, it can prevent that the contents of a container and an elastic member contact.

Each of the caps can have various configurations. The outer frame member includes a cylindrical main body portion having a first end portion and a second end portion in the axial direction, and a second end portion of the main body portion. The cover portion integrally provided on the outer peripheral surface, and the welding is performed by welding an end surface of the second end portion of the main body portion and a surface facing the first end portion side of the flange portion. The part can be formed.

A first container according to the present invention includes a container body formed in a bag shape and provided with a cylindrical port capable of discharging contents, and any of the caps described above. At least one of the second end and the second end of the inner frame member is fixed to the port of the container body.

In addition, a second container according to the present invention includes a container body formed in a bag shape by overlapping a pair of films, and any one of the caps described above, and the second end of the inner frame member In addition, a cylindrical insertion portion extending in a direction opposite to the first end portion is provided, and the insertion portion of the inner frame member is fixed between a pair of films of the container body.

A method for manufacturing a cap according to the present invention is a method for manufacturing a cap attached to a container body, wherein the cap is formed in a cylindrical shape having a first end and a second end in the axial direction, and is formed on the second end side. A step of preparing an inner frame member formed with a flange portion projecting radially outward, and a cylindrical shape having a first end portion and a second end portion in the axial direction and covering the outer periphery of the inner frame member A step of preparing an outer frame member formed with an outer frame engaging portion formed on the first end portion side and a cover portion covering the outer periphery of the flange portion formed on the second end portion side An elastic member is sandwiched between the outer frame engaging portion of the outer frame member and the first end portion of the inner frame member, and the opening of the first end portion of the inner frame member is formed by the elastic member. A gap is formed between the cover portion of the outer frame member and the flange portion of the inner frame member. A step in which the gap is open on the second end side of the outer frame member in the axial direction, and one of the inner wall surfaces of the outer frame member inward in the radial direction from the gap. Welding the portion and the flange portion of the inner frame member by ultrasonic welding.

According to the present invention, the material constituting the cap by welding can be prevented from protruding outward in the radial direction.

It is sectional drawing which shows one Embodiment of the cap which concerns on this invention. It is sectional drawing which shows an example of the manufacturing method of the cap of FIG. It is sectional drawing which shows the other example of the cap which concerns on this invention. It is sectional drawing which shows the other example of the cap which concerns on this invention. It is sectional drawing which shows the other example of the cap which concerns on this invention.

Hereinafter, an embodiment in which the cap according to the present invention is attached to an infusion bag will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a cap according to this embodiment. Hereinafter, for convenience of explanation, the vertical direction in FIG. 1 is referred to as “vertical”, but the direction of the cap according to the present invention is not limited to this. In the following embodiments, the upper end of each member corresponds to the first end of the present invention, and the lower end corresponds to the second end. The vertical direction corresponds to the axial direction of the present invention.

<1. Cap structure>
As shown in FIG. 1, the cap 10 is attached to a port 30 of an infusion bag 20, and combines a cylindrical inner frame member 1 and an outer frame member 2, and a disc-shaped elastic member therebetween. It is configured by sandwiching the member 3. Further, a closing member 4 is attached to the upper end opening of the cap 10 in a film shape.

The inner frame member 1 includes a cylindrical main body portion 11 and a flange portion 12 that protrudes radially outward from the lower end portion of the main body portion 11, and these are integrally formed. A thin film 13 that closes the upper end opening of the main body 11 is integrally formed at a position slightly lowering from the upper end of the main body 11. An annular groove 121 is formed on the upper surface of the flange portion 12.

The outer frame member 2 includes a cylindrical main body portion 21 and a cylindrical cover portion 22 that extends downward from the outer peripheral surface of the lower end portion of the main body portion 21, and these are integrally formed. Therefore, the connection part of the main-body part 21 and the cover part 22 has the step formed in the inner peripheral surface and the outer peripheral surface. The inner diameter of the main body portion 21 is larger than the outer diameter of the main body portion 11 of the inner frame member 1, and an annular protruding portion 211 that fits in the groove 121 of the flange portion 12 of the inner frame member 1 on the lower end surface of the main body portion 21. Is formed. The length of the protruding portion 211 and the depth of the groove 121 can be set to 0.5 to 3.0 mm, for example. The inner diameter of the cover portion 22 is larger than the outer diameter of the flange portion 12 of the inner frame member 1 and is arranged so as to cover the outer peripheral surface of the flange portion 12. At this time, the gap s between the inner peripheral surface of the cover portion 22 and the outer peripheral surface of the flange portion 12 is preferably 0.1 to 1.0 mm. This is because, if it is smaller than 0.1 mm, it will be difficult for the molten material to flow when both

members

1 and 2 are fixed, and if it is larger than 1.0 mm, a gap is wasted. This is because an inconvenience may occur. Further, the lower end of the cover portion 22 and the lower end of the flange portion 12 of the inner frame member 1 are adjusted so as to be arranged at substantially the same position in the vertical direction.

Further, the upper end portion of the main body portion 21 of the outer frame member 2 constitutes an outer frame engaging portion 212 for fixing the elastic member 3. That is, the outer frame engaging portion 212 has a U-shaped cross section so that the upper end portion of the main body portion 21 is folded inward and the front end portion faces downward and faces the upper end portion 111 of the inner frame member 1. Is formed. And the front-end | tip of the outer frame engaging part 212 and the upper end part 111 of the main-body part 11 of the inner frame member 1 are facing with a clearance gap, and the elastic member 3 is pinched | interposed liquid-tightly in this clearance gap.

The outer frame member 2 can be formed of various materials, for example, can be formed of a thermoplastic resin such as polyethylene or polypropylene. And it can manufacture using such a material using injection molding. On the other hand, the inner frame member 1 can be formed of the same material by injection molding or the like. However, when fixing, both the

members

1 and 2 are welded so that the inner frame member 1 is formed of a material compatible with the outer frame member 2. It is preferable.

Next, the elastic member 3 and the closing member 4 will be described. The elastic member 3 is formed in a disk shape, and an annular groove 31 is formed in the vicinity of the outer periphery of the upper surface. And the front-end | tip part of the outer frame engaging part 212 of the outer frame member 2 is engage | inserted by this groove | channel 31. FIG. The upper surface of the elastic member 3 (the portion inside the groove 31) is formed so as to be flush with the upper end of the outer frame member 2, and covers the upper end of the outer frame member 2 and the upper surface of the elastic member 3. As described above, the above-described closing member 4 is attached by heat welding or the like. The closing member 4 may be a known peel film formed in a film shape. Also, a pull ring or the like integrally formed at the upper end of the outer frame member 2 can be employed. The upper surface of the elastic member 3 and the upper end of the outer frame member 2 are not necessarily flush with each other. For example, the upper surface of the elastic member 3 is lower than the upper end of the outer frame member 2, A slight gap may be formed between the elastic member 3 and the elastic member 3.

On the other hand, an annular groove 32 is also formed near the outer periphery of the lower surface of the elastic member 3, and the upper end portion 111 of the main body 11 of the inner frame member 1 is fitted into the groove 32. When the elastic member 3 is fitted into the upper end portion 111, the lower surface of the elastic member 3 is disposed so as to be in contact with the upper surface of the thin film 13. Here, the upper end portion 111 fitted into the elastic member 3 corresponds to the inner frame engaging portion of the present invention.

The material constituting the elastic member 3 is not particularly limited, and for example, isoprene rubber, butyl rubber, thermoplastic elastomer and the like can be used.

<2. Cap manufacturing method>
Then, the manufacturing method of the cap comprised as mentioned above is demonstrated. First, as shown in FIG. 2, the elastic member 3 is sandwiched between the outer frame engaging portion 212 of the outer frame member 2 and the upper end portion 111 of the inner frame member 1, and the protruding portion 211 of the outer frame member 2 is provided. The inner frame member 1 is fitted into the groove 121 of the flange portion 12. At this time, the outer peripheral surface of the outer frame member 2 is fixed by a jig 6 or the like. Subsequently, the tool horn 5 for ultrasonic welding is brought into contact with the upper end portion of the outer frame member 2. The contact position of the tool horn 5 is directly above the protruding portion 211. Subsequently, for example, an ultrasonic wave of about 15 kHz is applied to the tool horn 5. Then, the amplitude is amplified by the tool horn 5 and the ultrasonic amplitude is transmitted to the outer frame member 2. Accordingly, the ultrasonic amplitude is transmitted through the outer frame member 2 and generates heat at the contact surface between the protruding portion 211 and the groove 121 of the flange portion 12 of the inner frame member 1. Thus, the contact portion between the protrusion 211 and the groove 121 is melted, and the outer frame member 2 and the inner frame member 1 are joined. The ultrasonic welding used here depends on the material of the inner frame member 1 and the outer frame member 2 and the frequency of the applied ultrasonic wave, but is usually completed in 1 second or less, which is suitable for improving productivity. . At this time, the protrusion 211 and the groove 121 joined by melting correspond to the welded portion of the present invention.

When the cap 10 is formed by the above steps, the cap 10 is attached to the port 30 of the container body 20 formed in a bag shape constituting the infusion bag. First, prior to attaching the cap 10, a chemical solution is injected into the container body 20 from the port 30. Subsequently, the cap 10 is attached to the port 30. For example, the lower end portion of the cover portion 22 of the outer frame member 2 and the lower end portion (or at least one of these) of the flange portion 12 of the inner frame member 1 are welded. Can be attached to the port 30. Subsequently, the closing member 4 is attached so as to cover the upper end of the outer frame member 2 and the upper surface of the elastic member 3. In this way, the cap 10 is attached to the port 30 of the container body 20 to complete the infusion bag. In addition, the method for welding the cap 10 to the port 30 is not particularly limited, and for example, a method in which both the welding surfaces are heated with a heater or the like and then the both are pressure-bonded can be mentioned.

<3. How to use an infusion bag>
The infusion bag manufactured in this way is used as follows, for example. First, the closing member 4 is removed from the cap 10. Subsequently, the needle of the infusion set is inserted into the elastic member 3. The needle penetrates through the elastic member 3 and the thin film 13 and communicates with the inside of the infusion bag 20 through the internal space of the inner frame member 1 and the port 30. In this state, the drug solution in the infusion bag 20 is administered to the patient through the infusion set.

<4. Features>
As described above, according to the present embodiment, the gap s is formed between the flange portion 12 of the inner frame member 1 and the cover portion 22 of the outer frame member 2. 1 and the outer frame member 2 are opened in the axial direction from the welded portion where the outer frame member 2 is fixed to the lower end side of the outer frame member 2. Therefore, even if the material of the inner frame member 1 or the outer frame member 2 is melted from the welded portion, the material flows into the gap s, so that it can be prevented from protruding to the outer periphery of the cap 10. Moreover, even if the melted material flows out from the gap s, the gap s is open to the lower end side of the outer frame member 2, and therefore prevents the cap 10 from flowing out radially outward. Can do. Therefore, since the outer diameter of the cap 10 does not change, as described above, the positioning when the outer frame member 2 is fixed with the jig 6 or the like can be performed with high accuracy at the time of manufacture. It can be accurately attached to the bag 20.

<5. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, the following changes can be made.

<5-1>
In the above embodiment, the elastic member 3 is sandwiched between the outer frame engaging portion 212 of the outer frame member 2 and the upper end portion 111 of the inner frame member 1, but between the outer frame member 2 and the inner frame member 1. As long as the elastic member 3 can be fixed, the means is not particularly limited. That is, the configuration of the outer frame engaging portion of the outer frame member 2 and the upper end portion of the inner frame member 1 is not particularly limited as long as the elastic member 3 can be fixed in a liquid-tight manner. For example, as shown in FIG. 3, a structure in which the upper end portion of the inner frame member 1 and the thin film 13 are formed to be flush with each other and the elastic member 3 is supported by the entire thin film 13 can be exemplified.

In the above embodiment, the annular groove 32 for fitting the upper end portion 111 of the main body 11 of the inner frame member 1 is formed on the lower surface of the elastic member 3. However, the groove 32 is not necessarily formed. It does not have to be. That is, since the elastic member 3 can be elastically deformed, the upper end portion 111 of the inner frame member 1 is recessed into the lower surface of the elastic member 3 even if the groove 32 is not formed. Also by this, the inner frame member 1 and the elastic member 3 are fixed in a liquid-tight manner.

<5-2>
In the above embodiment, the thin film 13 is provided on the inner frame member 1, but the thin film may not be provided. However, when it is desired to avoid contact between the contents of the infusion bag 20 and the elastic member 3, it is preferable to provide a thin film. Further, the closing member 4 is not essential and may be attached as necessary.

<5-3>
In the above embodiment, the inner frame member 1 and the outer frame member 2 are fixed by ultrasonic welding, but the method is not particularly limited as long as it can be fixed by melting. For example, the protruding portion 211 of the outer frame member 2 and the groove 121 of the inner frame member 1 can be heated and melted by a heater or the like to join them. Or depending on the material of the inner frame member 1 and the outer frame member 2, high frequency welding can also be employ | adopted.

<5-4>
In the above embodiment, the gap s between the cover portion 22 of the outer frame member 2 and the flange portion 12 of the inner frame member 1 is formed so as to extend in the vertical direction (axial direction). The path is not particularly limited as long as the opening does not face radially outward and is the lower end portion of the outer frame member 2 in the axial direction. For example, as shown in FIG. 4, the outer peripheral surface of the flange portion 12 is inclined outward in a tapered shape, and the inner wall surface of the cover portion 22 is inclined in accordance with this. As a result, a gap s is formed between the flange portion 12 and the cover portion 22 that is inclined radially outwardly downward. However, the lower end portion of the gap s does not go outward in the radial direction, and is opened downward. Therefore, it is possible to prevent the material melted at the time of welding from protruding from the outer peripheral surface of the cap 10.

<5-5>
In the said embodiment, the lower end of the cover part 22 of the outer frame member 2 and the lower end of the flange part 12 of the inner frame member 1 are adjusted so that it may be arrange | positioned in the up-down direction at substantially the same position, and this is set as an infusion bag. Although it is attached to 20 ports 30, the attachment method to the port 30 is not particularly limited. For example, as shown in FIG. 5, a cylindrical insertion portion 15 extending downward from the flange portion 12 of the inner frame member 1 can be integrally provided. The insertion portion 15 can be fixed by, for example, direct welding to a film of a container body that is not provided with a port. Specifically, a pair of films are overlapped, and the insertion portion 15 is inserted between them to be welded. Moreover, the periphery of a pair of film is fixed by welding etc., and is formed in a bag shape. Thus, the infusion bag is completed. In addition, the flange part 12 does not need to be provided in the lowest end part of the inner frame member 1, and should just be arrange | positioned in the lower end side rather than an upper end part.

<5-6>
In the said embodiment, although the cap 10 is attached to the infusion bag 20, it is not limited to an infusion bag, It can attach to various containers.

10 Cap 1 Inner frame member 111 Upper end part (inner frame engaging part)
12 Flange part 121 Groove part (welded part)
2 Outer frame member 211 Outer frame engaging portion 22 Cover portion 3 Elastic member 20 Infusion bag (container)
s gap

Claims

A cap attached to the container body,
An inner frame member formed in a cylindrical shape having a first end portion and a second end portion in the axial direction, and a flange portion protruding radially outward on the second end portion side;
It has a first end and a second end in the axial direction, is formed in a cylindrical shape that covers the outer periphery of the inner frame member, an outer frame engaging portion is formed on the first end side, and An outer frame member in which a cover portion covering the outer periphery of the flange portion is formed on the second end side;
An elastic member sandwiched between an outer frame engaging portion of the outer frame member and a first end portion of the inner frame member and closing an opening of the first end portion of the inner frame member;
With
A part of the inner wall surface of the outer frame member and the flange portion of the inner frame member have a welded portion fixed by welding;
Between the cover portion of the outer frame member and the flange portion of the inner frame member, a gap is formed radially outward from the welded portion,
The said gap is a cap extended from the said welding part and open | released by the 2nd end part side of the said outer frame member in the said axial direction.
The cap according to claim 1, wherein the welded portion is formed by ultrasonic welding.
The said welding part is formed when the convex part or recessed part formed in the said outer frame member and the recessed part or convex part formed in the said inner frame member fit, respectively. Cap.
The cap according to any one of claims 1 to 3, wherein the gap is 0.1 to 1.0 mm.
A thin film for closing the opening at the first end of the inner frame member;
The said elastic member is a cap in any one of Claim 1 to 4 arrange | positioned between the said thin film and the outer frame engaging part of the said outer frame member.
The outer frame member includes a cylindrical main body portion having a first end portion and a second end portion in the axial direction, and the cover portion integrally provided on the outer peripheral surface of the second end portion of the main body portion. Prepared,
6. The welded portion according to claim 1, wherein the welded portion is formed by welding an end surface of the second end portion of the main body portion and a surface facing the first end portion side in the flange portion. The described cap.
A container body formed in a bag shape and provided with a cylindrical port capable of discharging the contents;
A cap according to any one of claims 1 to 6;
With
A container in which at least one of the second end of the outer frame member and the second end of the inner frame member is fixed to a port of the container body.
A container body formed in a bag shape by overlapping a pair of films;
A cap according to any one of claims 1 to 6;
With
A cylindrical insertion portion extending in a direction opposite to the first end is provided at the second end of the inner frame member,
A container in which an insertion portion of the inner frame member is fixed between a pair of films of the container body.
A method of manufacturing a cap attached to a container body,
Preparing an inner frame member formed in a cylindrical shape having a first end portion and a second end portion in the axial direction and having a flange portion projecting radially outward on the second end side;
It has a first end and a second end in the axial direction, is formed in a cylindrical shape that covers the outer periphery of the inner frame member, an outer frame engaging portion is formed on the first end side, and Preparing an outer frame member in which a cover portion covering the outer periphery of the flange portion is formed on the second end side;
An elastic member is sandwiched between the outer frame engaging portion of the outer frame member and the first end portion of the inner frame member, and the opening of the first end portion of the inner frame member is closed by the elastic member. A step of forming a gap between the cover portion of the outer frame member and the flange portion of the inner frame member, the gap being opened on the second end side of the outer frame member in the axial direction. Step, and
Welding a part of the inner wall surface of the outer frame member and the flange portion of the inner frame member by ultrasonic welding inwardly in the radial direction from the gap;
A method for manufacturing a cap.