JP3241541B2 - 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 bag-shaped body constituting a medical bag, an opening (blood transfusion port, transfusion port, communication piece, connection port) welded to the upper part of the bag-shaped body, and a tube (blood collection). ,
The present invention relates to an improvement in a high-frequency welding method for parts such as blood transfusion, infusion, and connection tubes.

[0002]

2. Description of the Related Art As shown in FIG. 11, a method of manufacturing a medical bag which is currently carried out is mounted on a welding pin 52 between two sheets 51 constituting a bag-shaped main body. The above-mentioned parts 53 are placed and welding dies 54 and 55 are placed from above and below (54 is an upper die, 55 is a lower die).
Between the welding pin 52 and each of the upper and lower welding molds 5.
4, 55, and welding was performed by energizing between the upper mold 54 and the lower mold 55.

However, in these methods, the welding pins 52 are always required, and the welding pins 52 are taken in and out from the rear side of the sheet constituting the bag-shaped main body. Further, in the case of a long tube such as a blood collection tube, it is difficult to mount the tube on the welding pin 52 and welding is also difficult. For this reason, after a short connection port is welded to the bag-shaped main body, the connection port is attached to the connection port via an adhesive. For this reason, the cost was high.

[0004]

Means for Solving the Problems [1]The present invention  (1) Place the medical bag on a sheet laid horizontally or vertically.
Melt the mouth and / or lower end of the tube
(2) attaching the sheet of (1) to the mouth and / or the tube;
Fold it in the center,(A) The mouth and / or the periphery of the tube are welded
After, weld the outer edge of the sheetTo form a bagProcessAlso
Is (B) Peripheral edge of mouth and / or tube and outer edge of sheet
Process of simultaneously welding the parts to form a bag,Method for manufacturing a medical bag comprising the above steps Provide
You.

[2]The present invention  (1) A horizontal or vertical laying on or in front of the lower mold
Attached to the upper mold (electrode clamp) on or in front of the sheet
A step of contacting the lower end surface of the mouth and / or the tube, (2) through a lower mold from the lower side or the rear side of the sheet.
Insert the grounding rod and open the sheet pressed with the tip of the grounding rod.
(3) High frequency is applied between the upper mold (electrode clamp) and the earth rod.
Energize and push into mouth and / or tube space
Simultaneously with welding the sheet and mouth and / or tube
Welding the mouth and / or tube end face to the sheet
(4) The sheet of (3) above with the mouth and / or tube
(5) a process of folding back to the center(A)(4) between the upper and lower welding dies
And weld the mouth and / or the peripheral edge of the tube
After that, the sheet is sandwiched between upper and lower frame molds, and the sheet is
Of welding the outer edge of the bag to form a bagOr (B) The sheet of (4) above and below the welding die
Sandwiched between the frame molds, the periphery of the mouth and / or tube
To weld the outer edge of the sheet and the sheet simultaneously to form a bag
AboutMethod for manufacturing a medical bag comprising the above stepsOffer
Offer.

[3] The present invention provides (2) described in [2],
Instead of the step (3), (2) a grounding rod having a sharp tip is inserted from below or from the back of the sheet through a lower mold to make a hole in the sheet, and the outer periphery of the grounding rod is inserted. (3) pressing a sheet wound around the ground rod on the outer periphery of the ground rod by applying a high frequency between the upper mold (electrode clamp) and the ground rod. At the same time as welding on the inner surface of the mouth and / or tube, the mouth and / or
Alternatively, there is provided the method for manufacturing a medical bag according to the above [2], comprising a step of welding the end face of the tube and the sheet. [4] In the present invention, a bag-shaped main body made of a sheet made of a flexible synthetic resin is placed at a boundary of a mouth and / or a tube alignment line.
Provided is a medical bag in which a mouth and / or a lower end surface of a tube are high-frequency welded to a surface formed by folding in two .

[0007]

1 to 3 are schematic views of a manufacturing process of a medical bag 1 according to the present invention. The medical bag 1 is manufactured by the following steps. As a first step, a sheet 7 made of a flexible synthetic resin is laid horizontally or vertically as shown in FIG.
The mouth 4 and / or the tube 3 covered with a protector 5 on the top or front of the tube 3 (when the tube 3 has a small diameter, the connection tube 3b is attached to the end of the tube 3 in order to maintain the strength of the tube 3 Hereinafter, in the present invention, the lower end surfaces 3a, 4a of the tube 3 include a tube having a connection tube 3b attached to an end thereof. In a second step, as shown in FIG. 2, each of the openings 4 and / or the tube 3 is folded back at the boundary of the alignment line, and the peripheral portion of each of the openings 4 and / or the tube 3 is welded as shown in FIG. Then, the outer edge of the sheet 7 is welded to form a bag . Alternatively, the periphery of the mouth and / or the tube and the outer edge of the sheet are simultaneously welded to form a bag.

FIG. 4 is an enlarged sectional view showing an embodiment when the mouth portion 4 and the like are welded to the sheet 7. FIG. 5 shows the upper mold 8 of FIG.
FIG. 6 is a side view of the upper mold 8 (viewed in the direction of arrow B), and FIG. 7 is a plan view of the lower mold 12 in FIG. 4 (view in the direction of arrow C). FIG. 8 is a side view of the lower mold 12 (a view as seen from an arrow D). The upper mold 8 is made of a conductive material such as a metal,
The lower mold 12 is made of a heat-resistant insulating material (Teflon, bakelite, or the like) or the like, and the lower mold 12 has an earth rod 17 having an end mounted on an air cylinder 15 so as to penetrate the center thereof. A predetermined number is arranged according to the number of the mouth portions 4 and the tubes 3 to be welded. The lower mold 12 and the ground bar 17 serve as a ground. In this embodiment, the medical bag 1 is manufactured by the following steps. As a first step, the mouth 4 and the tube 3 are mounted in the mounting grooves 9 and 10 of the upper mold 8, and the mouth 4 is placed on the sheet 7 laid horizontally or vertically on the lower mold 12 or on the front surface. Then, the lower end face of the tube 3 is brought into contact.

In the second step, a grounding rod 17 having a rounded tip is inserted from below or rearward of the sheet 7 via the lower mold 12 and the sheet is pressed upward from below at the tip of the grounding rod 17. 7 is pushed into the space of the mouth portion 4 and the tube 3. The pushed-in portion of the sheet 7 serves as a film 16. The position at which the film 16 is formed in the space between the mouth 4 and the tube 3 can be freely set by changing the depth of the pushing of the earth rod 17. Also, as will be described later, when a current is applied between the upper mold 8 (electrode clamp) and the earth rod 17 and the opening 4 and the tube 3 are in a molten state, the earth rod 1
By pushing the 7 deeper, the position of the film 16 can be changed.

As a third step, a high frequency current is applied between the upper mold 8 (electrode clamp) and the grounding rod 17 so that the outer surface of the sheet 7 pushed into the tube 3 is opened.
The mouth 4 and the tube 3 are welded to the inner surface of the tube 3 at the same time.
And the sheet 7 is welded. The high-frequency energy can be applied to the joint between the mouth 4 and the end face of the tube 3 and the sheet 7 by the protrusion 11 of the upper mold 8, and the sheet 4 can be welded to the mouth 4 and the end face of the tube 3. . As a fourth step, the sheet 7 is folded in two at the boundary line of the mouth 4 and the tube 3. As a fifth step, the sheet 7 is sandwiched between the upper and lower welding dies 28 and 32 as shown in FIG. 9 and energized, and residual blood (residual liquid) is generated in the mouth 4 and the peripheral portion of the tube 3. Weld in a streamlined manner. As a sixth step, the sheet 7 is sandwiched between upper and lower frame dies (not shown), energized, and the outer edge of the sheet is welded to form a bag. The fifth step and the sixth step can be performed simultaneously by mounting the welding dies 28 and 32 in the frame die.

FIG. 10 is an enlarged sectional view showing another embodiment when the mouth portion 4 and the like are welded to the sheet 7. In this embodiment, a medical bag is manufactured by the following second and third steps in place of the second and third steps of the embodiment shown in FIGS. As a second step, a grounding rod 18 having a sharp tip is inserted from below or rearward of the sheet 7 via the lower mold 12 to make a hole in the sheet 7 and wound around the outer periphery of the grounding rod 18. Put the seat 7 on the mouth 4,
Push into the space of tube 3. As a third step, the upper die 8 and the (electrode clamp) is applying a high frequency between the ground rod 18, the outer sheet 7 that is wound around the outer periphery of the ground bar 18
The sheet 7 is welded to the inner surface of the mouth portion 4 and the tube 3 at the same time as the sheet 7 is welded to the end surface of the mouth portion 4 and the tube 3.

[0012]

(1) Since a long tube can be held by a mold (electrode clamp), welding to a sheet is easy. (2) Since the mouth and the end face of the tube can be directly welded onto the sheet, there is no need to use a welding pin as in the prior art, and the hygiene in the bag-shaped body can be maintained.

[Brief description of the drawings]

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

FIG. 2 is a schematic view of a manufacturing process of the medical bag of the present invention.

FIG. 3 is a schematic view of a manufacturing process of the medical bag of the invention.

FIG. 4 is an enlarged cross-sectional view when a mouth or the like is welded to a sheet.

FIG. 5 is a plan view of an upper mold used in FIG.

FIG. 6 is a side view of the upper mold shown in FIG.

FIG. 7 is a plan view of the lower mold used in FIG.

FIG. 8 is a side view of a lower mold used in FIG.

FIG. 9 is an enlarged sectional view when the outer periphery of the sheet is welded.

FIG. 10 is an enlarged sectional view showing another embodiment of FIG. 4;

FIG. 11 is a schematic view of a conventional method for manufacturing a medical bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Medical bag 2 Main body 3 Tube 3b Connection tube 4 Mouth 5 Protector 6 Blood collection needle 7 Sheet 8 Upper mold (electrode clamp) 9, 29, 39 Mounting groove of opening 10, 30, 40 Mounting groove of tube 11 Projection Part 12 Lower mold (earth) 13 Through hole of earth rod corresponding to mouth 14 Through hole of earth rod corresponding to tube 15 Air cylinder 16 Membrane 17 Earth rod 18 Earth rod 28 Upper mold (welding mold) 32 Lower mold (welding mold)

Claims (4)

(57) [Claims] (1) a step of welding a lower end surface of a tube and / or a tube constituting a medical bag on a horizontally or vertically laid sheet; (2) a step of welding the sheet of (1) above; folded into two separate component and / or around the tube, (a) after the welding a peripheral portion of the opening and / or tube, also the step of forming by welding the outer edges of the sheet into a bag
The medical bag characterized by comprising from (B) the mouth and / or the step of the peripheral edge and the outer edge portion of the sheet of the tube are welded simultaneously to form a bag shape, each of the above steps
Production method. (1) A lower end face of a mouth and / or a tube mounted on an upper mold (electrode clamp) is brought into contact with a sheet or a front face laid horizontally or vertically on a lower mold or on a front face thereof. (2) a step of inserting an earthing rod from below or rearward of the sheet via a lower mold, and pushing the sheet pressed by the tip of the earthing rod into the space of the mouth and / or tube; The high-frequency current is applied between the upper mold (electrode clamp) and the earth rod to weld the sheet and the mouth and / or the tube pushed into the space of the mouth and / or the tube, and at the same time, the end face of the mouth and / or the tube. (4) a step of folding back the sheet of (3) into two around a mouth and / or a tube, and (5) (A) a die for welding the sheet of (4) above and below. Between the mouth and / or After welding the periphery of the tube, by sandwiching the sheet in upper and lower portions of the frame mold process or formed into a bag shape by welding the outer edges of the sheet, welding gold sheets (B) the (4) and sandwiched between the upper and lower frame molds fitted with a mold, forming the mouth portion and / or the peripheral edge and the outer edge portion of the sheet of tubes welded at the same time a bag shape, that consists of more steps Features of medical bags
Production method. (3) Instead of the steps (2) and (3) described in (2), (2) an earth rod having a sharp tip formed from a lower side or a rear side of the sheet via a lower mold. Inserting a hole in the sheet, pushing the sheet wound around the outer periphery of the earth rod into the space of the mouth and / or tube, (3) applying high frequency between the upper mold (electrode clamp) and the earth rod By energizing the sheet, the sheet wound around the outer circumference of the earth rod is welded to the mouth and / or the inner surface of the tube, and
3. The method for manufacturing a medical bag according to claim 2, further comprising: welding the end face of the tube to the sheet. 4. A bag-shaped main body made of a sheet made of a flexible synthetic resin , two of which are bounded by an opening and / or a tube alignment line.
The surface formed by folding, the lower end surface of the mouth portion and / or the tubes were high frequency welding, medical bags, characterized in that.