JP3195178B2 - Medical bag and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical bag for storing blood, a drug solution, and the like, and an improvement in a method for manufacturing the medical bag.

[0002]

2. Description of the Related Art A medical bag currently used is constructed by welding a protector 134 having an infusion port 133 mounted on an upper portion of a bag-shaped main body 132. For this reason, the production has been performed by the following steps.

(1) A step of forming two synthetic resin sheets 136 into a hat-shaped protector 134 using a molding machine, and loading an infusion port 133 mounted on a jig 137 into the protector 134 (FIG. 17). (2) The protector 134 of (1) is placed between the two synthetic resin sheets 136, and the protector 134, the base 135 of the infusion port 133, and the upper end of the sheet 136 in contact with them are the upper and lower mouth molds. 138 for welding by pressing (FIG. 1)
8), (3) a step of pressing the sheet 136 of (2) with upper and lower dies (not shown) to form the bag-shaped main body 132 (FIG. 19);

However, there are the following problems in manufacturing these medical bags. When welding the protector 134 to the sheet 136 in the step (2), the protector 134 attached to the welder pin 137 must be inserted from below the sheet 136. In addition, the welder pin 137 is mounted on the turntable, and undesirably rubs the inside of the sheet 136 together with the protector 134 mounted on the welder pin 137. To remove these obstacles, the protector 134 attached to the welder pin 137 from above the seat 136
However, since the diaphragm is formed inside the infusion port 133, the welder pin 137 cannot be inserted deeply. It was difficult to adjust the welding strength when welding the protector 134 and the sheet 136 in the step (2). The inventor of the present invention has made intensive studies in order to solve the above-mentioned problems, and has arrived at the following invention.

[0005]

[Means for Solving the Problems]

[1] The present invention provides a method for manufacturing a medical bag comprising the following steps. (1) An infusion port covered with a protector was placed between two synthetic resin sheets from above, and the base of the infusion port and the sheet in contact therewith were formed with a pressing groove in the length direction of the infusion port. An electrode and upper and lower mouth dies formed by arranging an insulator having a groove formed in the lateral direction of the pressing groove between the electrodes, or a front die and a rear die having the pressing groove formed. (2) pressing the sheet of (1) above and below with the upper and lower frame dies to form a bag-shaped main body; An infusion port covered with a protector is placed between two synthetic resin sheets from above, and the base of the infusion port and the sheet in contact with the infusion port are formed with a pressing groove in the length direction of the infusion port, An insulator having a groove formed in the lateral direction of the pressing groove between the electrodes. Between the upper and lower frame dies equipped with the upper and lower mouth dies or upper and lower mouth dies formed with the pressing grooves formed by placing the upper and lower mouth dies formed with the pressing grooves. Provided is a method for manufacturing a medical bag which is pressed by a frame mold to form a bag-shaped main body. [ 3 ] The present invention provides a method for manufacturing a medical bag comprising the following steps. (1) Place an infusion port between two synthetic resin sheets,
A step of pressing the middle part of the infusion port and the sheet in contact therewith by pressing the upper and lower seal dies and welding them; (2) placing the sheet of (1) in the base of the infusion port and the sheet in contact with the base in the length direction of the infusion port; An electrode having a pressing groove, and an upper and lower mouth mold or a front mold having a pressing groove formed by arranging an insulator having a groove formed in the lateral direction of the pressing groove between the electrodes. A step of pressing and welding by upper and lower mouth molds constituted by a rear mold; and (3) pressing the sheet of (2) by the upper and lower frame molds to inject an infusion port into the bag-shaped main body and the upper part thereof. [ 4 ] The present invention comprises integrally forming a bag-shaped body and a protector having an infusion port at the top of the bag-shaped body with a series of flexible synthetic resin sheets, The middle part of the infusion port is the primary weld, the base is the secondary weld It welded more protectors, to provide a medical bag which is formed a protrusion on the second weld portion. [ 5 ] The present invention according to [ 4] , wherein a blood collection (blood transfusion) tube having a base formed to have a larger diameter and a larger thickness than the main body is welded and fixed to an upper part of the bag-shaped main body, and a projection is formed on the base. Provide medical bags.

[0006]

FIG. 1 is a schematic view of a medical bag 1 according to the present invention.
The medical bag 1 is a bag-shaped main body 2 made of a flexible synthetic resin.
The base 5 of the infusion port 3 covered with the protector 4 is welded and fixed to the upper part of the bag-shaped main body 2, and the base 5 of the infusion port 3 is formed with a protrusion 12. The protrusion 12 is formed in a bank shape in the lateral direction of the infusion port 3. The protrusion 12 may be formed with only one thick member or with two or three thin members.

Next, a method of manufacturing the medical bag 1 will be described. As shown in FIGS. 2 and 3, an infusion port covered with a protector 4. The connection member 13 is mounted on a jig 7 (parts feeder), and these are placed between the two synthetic resin sheets 6 from above. As shown in FIG. 4, the sheet 6 is formed with an electrode 8a in which a pressing groove 15 is formed in the length direction of the infusion port 3, and a semicircular groove 9 is formed between the electrodes 8a in the lateral direction of the pressing groove 15. The base 5 of the infusion port 3 and the protector 4 and the sheet 6 in contact with the base 5 are welded by applying high frequency by pressing the upper and lower mouth dies 8, 8 formed by disposing the insulator 8 b thus formed. .

As shown in FIG. 4, high frequency is supplied from a power supply 16, and the upper and lower electrodes 8a of the upper and lower die 8 have the same polarity (for example, an earth electrode (E) and an earth electrode). (E) or the supply electrode (S) and the supply electrode (S)), and the electrodes 8 arranged in the length direction of the infusion port 3 via the insulator 8b.
a are alternately different poles (for example, earth electrode (E), supply electrode (S), earth electrode (E)... or supply electrode (S),
The wiring is performed so as to be the ground electrode (E), the supply electrode (S),... When the power supply 16 is operated and a high frequency is applied between the electrodes 8a, heat is generated in the groove of the insulator 8b between the ground electrode (E) and the supply electrode (S), The exposed surface of the sheet 6 begins to soften, and further induces softening of the lower layer of the sheet 6 and the infusion port 3. The upper and lower mouth molds 8 are located on the surface of the sheet 6 sandwiched between the molds 8.
The repulsive force stored at the time of pressing and holding in step is gradually released by the softening of the sheet 6, but since the repulsive force acts on the outer side of the tube such as the infusion port 3 at the deep portion of the sheet 6 on the opposite side. The softened sheet 6 and the tube are sequentially driven into the groove 9 to form the projecting portion 12.

[0009] Since a strong pressure acts between the upper and lower dies 8 and 8 which are in contact with the sheet 6, and the heat generated in the grooves 9 on both sides is transmitted, it is necessary to control the pressure and the heat generation. Thus, a suitable welded portion can be formed. As described above, since the transmission of heat from both sides and the strong pressure due to the pinching between the upper and lower sides are used, the space between the protrusions 12 (bank-like welding marks) is completely sealed as shown in FIG. The part 14 is formed. In FIG. 5, the inside of the rectangular frame is welded (primary welding portion 10). In order to form two welds 14 as shown in FIG. 5, it is necessary to arrange three insulators 8b having grooves 9 between four electrodes 8a as shown in FIG. FIG. 6 shows a cross section of the primary welded portion 10 in this case. Next, as shown in FIG. 7 (FIG. 8 is a partially enlarged view of FIG. 7), the sheet 6 is pressed by upper and lower frame dies (not shown) to form the secondary welding portion 11, and the bag-shaped main body is formed. Form 2 Finally, the contour of the welded portion 11 is press-cut to separate the medical bag 1 from the sheet.

FIGS. 9 and 10 show a medical bag 1 according to the present invention.
It is a schematic diagram showing the principle of another manufacturing method of. As shown in FIGS. 2 and 3, the infusion port 3 and the like are mounted on a jig 7 (parts feeder), and these are placed between two synthetic resin sheets 6 from above, and as shown in FIG. Sheet 6
Is pressed by upper and lower mouth dies 18 and 18 comprising a front mold 18a and a rear mold 18b to apply a high frequency, thereby welding the base 5 of the infusion port 3 and the protector 4 or the sheet 6 in contact with the base. . Semi-circular pressing grooves 19a and 19b are also formed in the front mold 18a and the rear mold 18b constituting the mouth mold 18 similarly to the mouth mold 8.

As shown in FIG. 9, high frequency is supplied from a power supply 26, and the opening die 18 is composed of upper and lower front dies 18a and rear dies 18b (electrodes 8a of the opening die 8 shown in FIG. 4 respectively). Are opposite to each other (for example, ground electrode (E) and ground electrode (E) or supply electrode (S) and supply electrode (S)), and front mold 18a and rear mold 18b. The surfaces facing each other via a space formed between them (playing the role of the insulator 8b of the opening die 8 shown in FIG. 4) have different polarities (for example, a ground electrode (E), a supply electrode (S) or The wiring is made so as to be the supply electrode (S) and the ground electrode (E). When the power supply 26 is operated to apply a high frequency between the front mold 18a and the rear mold 18b, heat is generated in a space formed between the front mold 18a and the rear mold 18b, and from the surface of the sheet 6 in contact with the space. By softening and subsequently inducing softening on the surface of the infusion port 3, there is no boundary between the sheet 6 and the infusion port 3 (tube), so that the sheet 6 and the infusion port 3 are welded to each other.

More specifically, as shown in FIG. 9, the rear die 18b (or the front die 18a) is disposed at a predetermined distance from the front die 18a (or the rear die 18b), and the sheet 6 and the like are vertically moved. Mould 18 (front mold 18a and rear mold 18b)
When compression is clamped by the pressing, a portion that is not pressed and clamped is formed.
The projection 22a is brought into a space (hereinafter referred to as an application area) formed between the front mold 18a and the rear mold 18b. In order to perform reliable welding in a short time, it is necessary to bring as many members as possible into the application area, but this takes into account the inner and outer diameters of the tube and the elasticity.
8 and the distance between the front mold 18a and the rear mold 18b is determined by experiment.

The member pushed out to the application area by the above-described method becomes a protruding portion 22a, and the power source 26 is operated to activate the front mold 1
When a high frequency is applied between the metal mold 8a and the rear mold 18b, heat is generated in an application area between the ground electrode (E) and the supply electrode (S), and the protrusion 22a as a member in the application area immediately starts melting. I do. The melted member further releases a repulsive force (compressive stress) while softening the deeper member, so that the compressive stress accumulated in the deeper portion when compressed and sandwiched raises the molten member from the center to the outer shape and protrudes. The part 22b is formed (see FIG. 10). The protrusion 22b is formed by the above method. The thickness of the protrusion 22b can be freely set by adjusting the distance between the front mold 18a and the rear mold 18b and the application time, and the shape of the protrusion 22b is determined by the shape of the circumferential groove provided in the application area. If it is formed into a convex, semi-circular or chevron shape, it becomes a beautiful and strong weld. Thereafter, a secondary weld is formed in the same manner as in the method of FIG. 7, and the secondary weld is press-cut to obtain the medical bag 1. In the present invention, the mouth dies 8, 18 are mounted on a frame mold (not shown), and the infusion port 3 is disposed between the two sheets 6 as shown in FIGS.
And the like are pressed by the mouth dies 8 and 18 to apply a high frequency, so that the sheet 6 and the primary infusion portion 3 such as the infusion port 3 are applied.
The medical welding bag 1 can be formed by simultaneously forming the secondary welding portions 11 on the outer periphery of the sheet 6 and the sheet 6 in one step.

FIG. 11 is a schematic view of a medical bag 31 according to the present invention, in which a bag-shaped main body 32 and a protector 34 are integrally formed by welding a series of flexible synthetic resin sheets. In the protector 34, the infusion port 33,
The connection member 43 is enclosed. The infusion port 33 is welded to the protector 34 by the primary welding portion 40a of the middle portion and the secondary welding portion 41 of the base 35, and the secondary welding portion 41 has a projection 42 similar to that of the medical bag 1 described above. . The uppermost end of the protector 34 forms a tertiary welding portion A44 to seal the infusion port 33, and a tertiary welding portion B47 is formed on the outer periphery of the bag-shaped main body 32. A cut line 45 is formed in the protector 34, and a cut 46 is formed at the starting point of the cut line 45.

Next, a method of manufacturing the medical bag 31 will be described. As shown in FIG. 12, the infusion port 33 mounted on the jig 37 and the like between the two synthetic resin sheets 36 are connected to the sheet 3.
6 and placed on the middle abdomen of the infusion port 33 and the sheet 36 in contact therewith, the upper and lower seal dies (not shown) are further pressed to form primary welds 40a and 40b. At this time, the first welding portion 40a first applies a high frequency from the core pin 37, so that the first welding portion 40a is circumferentially welded by the width of the mold, and then applies the high frequency between the upper and lower portions of the mold.
Weld on top and bottom. At this time, if the cutting blade is attached to the mold, the cutting line 45 and the cutout 46, which are dotted or continuous thin portions, can be formed simultaneously with the primary welding portion 40b.

Subsequently, the sheet 36 and the like are pressed by the mouth dies 8 and 18 shown in FIG. 4 or FIG. 9 to form the secondary welding portion 41 having the protrusion 42. As shown in FIG. 13, the sheet 36 is pressed by upper and lower frame dies (not shown) to form a tertiary welding portion A44 and a tertiary welding portion B47, and the bag-shaped main body 32 and an infusion port 33 and the like on the upper part thereof. Is formed to form a protector 34 enclosing. Finally, the protector 34 and the tertiary welds A44 and B47 are press-cut to separate the medical bag 31 from the sheet 36. In use, the infusion port 33 can be exposed by cutting off the protector 34 from the cutting line 45 as shown in FIG.

FIG. 15 is a schematic view of a medical bag 1a showing another embodiment of the medical bag 1 of FIG. In the medical bag 1a, the tube 20a in which the base 13b is formed to have a larger diameter and a larger thickness than the main body 13c is formed as shown in FIGS.
Is welded between the two synthetic resin sheets 6 (upper part of the bag-shaped main body 2) by the method described in
The projecting portion 12 and the strong welding portion 14 can be formed on the outer periphery of b. Thereby, the tube 20a can be firmly fixed between the sheets 6, 6, and the tube 20a can be fixed.
The holding strength of a can also be improved.

FIG. 16 is a schematic view of a medical bag 31a showing another embodiment of the medical bag 31 of FIG.
Also in the medical bag 31a, the tube 60a similar to the tube 20a is placed between the two synthetic resin sheets 6 by the method shown in FIGS.
2), the protrusion 42 and the secondary weld 41 can be formed on the outer periphery of the base 43b. Thereby, the tube 60a can be firmly fixed between the sheets 6 and 6, and the holding strength of the tube 60a can also be improved.

[0019]

As described above, according to the present invention, when the infusion port 3 is mounted, the infusion port 3 is inserted from above the sheet 6, so that the inside of the sheet 6 is not rubbed unlike the related art. When a bank-shaped protrusion 12 is formed on the base 5 of the infusion port 3 and a plurality of protrusions 12 are formed, a strong welded portion 14 can be formed between these protrusions 12, so that the conventional method can be used. The adjustment of the welding strength is easier than in the method, and the strength of the medical bag can be improved. Since the bag-shaped main body 2 and the protector 4 are integrally formed, the steps can be simplified as compared with the conventional method, which is suitable for mass production and cost reduction. On the upper part of the bag-shaped main body 2 (32), a base 13b (43b)
By welding and fixing a tube 20a (60a) having a larger diameter and a larger thickness than the main body 13c (43c), the tube 20a (60a) can be firmly fixed to the bag-shaped main body 2 (32), The holding strength of 20a (60a) can also be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a medical bag of the present invention.

FIG. 2 is a schematic view showing a method for manufacturing the medical bag of FIG. 1;

FIG. 3 is a schematic view showing a method of manufacturing the medical bag of FIG. 1;

FIG. 4 is a schematic view showing a method for manufacturing the medical bag of FIG. 1;

FIG. 5 is a schematic view showing a method for manufacturing the medical bag of FIG. 1;

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a schematic view showing a method of manufacturing the medical bag of FIG. 1;

8 is a partially enlarged view of FIG. 7;

FIG. 9 is a schematic view showing another method for manufacturing a medical bag.

FIG. 10 is a schematic view showing another method for manufacturing a medical bag.

FIG. 11 is a schematic view of a medical bag of the present invention.

FIG. 12 is a schematic view showing a method of manufacturing the medical bag of FIG. 11;

FIG. 13 is a schematic view showing a method for manufacturing the medical bag of FIG. 11;

FIG. 14 is a use state diagram of FIG. 11;

FIG. 15 is a schematic view showing another embodiment of the medical bag of FIG. 1;

FIG. 16 is a schematic view showing another embodiment of the medical bag of FIG. 11;

FIG. 17 is a schematic view showing a conventional method for manufacturing a medical bag.

FIG. 18 is a schematic view showing a conventional method for manufacturing a medical bag.

FIG. 19 is a schematic view showing a conventional method for manufacturing a medical bag.

[Description of sign]

1, 31 Medical bag 2, 32 Bag-shaped main body 3, 33 Infusion port 4, 34 Protector 5, 35 Base of infusion port 6, 36 Sheet 7 Jig 8 Port mold 8a Electrode 8b Insulator 9 Groove 10, 40a , 40b Primary welding part 11, 41 Secondary welding part 12, 22a, 22b, 42 Projection part 13, 43 Connection member 13b, 43b Base part 13c, 43c Main body 14 Strong welding part 15 Press groove 16, 26 Power supply 18 Base metal Mold 18a Front mold 18b Rear mold 19a Press groove 19b Press groove 20, 20a, 60, 60a Blood sampling (infusion) tube 37 Core pin 44 Tertiary welding part A 45 Cutting line 46 Cut end 47 Tertiary welding part B

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61J 1/10 B29C 64/04 B29D 22/00 B29L 22:00

Claims (5)

(57) [Claims] 1. A method for manufacturing a medical bag, comprising the following steps. (1) An infusion port covered with a protector was placed between two synthetic resin sheets from above, and the base of the infusion port and the sheet in contact therewith were formed with a pressing groove in the length direction of the infusion port. An electrode and upper and lower mouth dies formed by arranging an insulator having a groove formed in the lateral direction of the pressing groove between the electrodes, or a front die and a rear die having the pressing groove formed. (2) pressing the sheet of (1) with the upper and lower frame dies to form a bag-shaped main body; 2. An infusion port covered with a protector is placed between two synthetic resin sheets from above, and the base of the infusion port and a sheet in contact with the infusion port are formed with a pressing groove in the length direction of the infusion port. The upper and lower mouth dies or the front mold and the rear mold having the pressing grooves formed by arranging the formed electrodes and the insulator having the grooves formed in the lateral direction of the pressing grooves between the electrodes. A method for manufacturing a medical bag, characterized in that a bag-shaped main body is formed by pressing the upper and lower frame molds between the upper and lower frame molds equipped with the upper and lower mouth molds. 3. A method for manufacturing a medical bag, comprising the following steps. (1) A step of placing an infusion port between two synthetic resin sheets and pressing and welding the middle part of the infusion port and the sheet in contact with the upper and lower seal molds, (2) (1) By placing a sheet with a base of an infusion port and an electrode having a pressing groove formed in the sheet in contact with the infusion port in the length direction of the infusion port, and an insulator having a groove formed in the lateral direction of the pressing groove between the electrodes. Pressing and welding by the upper and lower mouth dies configured by the upper and lower mouth dies or the front and rear dies having the pressing grooves formed therein, and (3) the sheet of (2) described above. A step of pressing the upper and lower frame dies to integrally form a bag-shaped body and a protector in which an infusion port is sealed at the top of the bag-shaped body; 4. A bag-shaped main body and a protector having an infusion port sealed in the upper portion of the bag-shaped main body are formed integrally with a series of flexible synthetic resin sheets. A medical bag characterized by being welded to a protector by a secondary welding portion and forming a projection at the secondary welding portion. 5. The medical device according to claim 4 , wherein a blood collecting (blood transfusion) tube having a base portion formed larger in diameter and thicker than the main body is welded and fixed to an upper portion of the bag-shaped main body, and a projection is formed on the base portion. bag.