JP2557554B2 - Port member welding device in bag-shaped container manufacturing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a port member welding apparatus in a bag-shaped container manufacturing apparatus for manufacturing a bag-shaped container by welding and sealing a resin port member on a tubular film.

2. Description of the Related Art In the Japanese Patent Application No. 1-65686, the inventor of the present invention cuts a tubular film fed from an original fabric, inserts a port member into the opening of the cut tubular film and welds the same, and We proposed an apparatus for manufacturing bag-shaped containers by welding and sealing. In the port welding step of this bag-shaped container manufacturing apparatus, the port members are welded by separating the left and right holding rods from each other and extending the opening of the tubular film to the left and right, then raising the receiving block and lowering the heat block. Then, the port member positioned in the center of the opening is welded.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, since the crimping surface of the above heat block is formed in the semi-circular recess corresponding to the port member, the corner of the semi-circular recess comes into contact with the tubular film while descending, and the corner lowers. In some cases, the contact portion was ruptured by heat and was not in a good welded state, so that sufficient sealing could not be achieved.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a port member welding device in a bag-shaped container manufacturing device that can always perform good heat welding.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention inserts a resin port member into the opening of a tubular film, and seals the port member and the opening by heat welding. In a container manufacturing apparatus, a pair of welding heads having recesses corresponding to the port members formed on the pressure contact surface are sandwiched between the welding positions of the port members to the tubular film, and the welding heads are arranged so as to be able to approach and separate from each other. Is composed of a heat block and a pair of clamp blocks arranged on both end sides in the length direction of the port member of the heat block, and these clamp blocks are provided slidably in the pressure contact direction with respect to the heat block,
Providing an urging means for urging the clamp block to the pressure contact side,
The movement limits of these clamp blocks are set so that the pressure contact surface of the clamp block is closer to the welding position than the pressure contact surface of the heat block.

Action In the above configuration, when each welding head is brought closer to the welding position side, the clamp head first contacts the welding position, and the tubular film is positioned by pressing the tubular film along the outer peripheral portion of the port member, Further, the heat block is pressed against the welding position against the biasing means, and the tubular film is brought into close contact with the port member to be heat-welded. Thereby, the port member can be reliably and uniformly welded to the opening of the tubular film.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

 First, the outline of the bag-shaped container manufacturing apparatus will be described.

As shown in FIG. 10, this manufacturing apparatus includes a film cutting step A in which a film cutting device 3 for cutting the tubular film 2A fed from the material 1 into a predetermined length is provided, and the tubular film 2B cut. A port welding step B in which the first welding device 5 for inserting the port members 4A and 4B into both of the cutting openings and heat-welding is provided; and a blank step C provided for the convenience of design.
Bag-shaped container 2C by heat welding both cutting openings of tubular film 2B
Shoulder sealing step D in which the second welding device 6 for forming the above is provided, and the sealing portion 2a formed by the first and second welding devices 5 and 6
Shoulder cooling step E provided with a welded part cooling device 7 for cooling, a trimming step F provided with a trimming device 8 for cutting an unnecessary portion of the seal part 2a, and an unloading step for carrying out the trimmed bag-shaped container 2C. G, and a first transporting device 9 for transporting from the film cutting process A to the port welding process B while being fitted onto the cut tubular film 2B while retaining the cylindrical shape, the port welding process B, and the blank. Process C,
Cylindrical film 2B between the shoulder sealing process D, shoulder cooling process E, trimming process F, and unloading process G.
A second transfer device 10 that transfers the (bag-shaped container 2C) is provided.

As shown in FIGS. 5 and 6, the first welding device 5 in the port welding step B has a port member 4 made of synthetic resin.
Parts fielder 11 for supplying A and 4B respectively, and delivery device 1 for taking out and delivering the port members 4A and 4B one by one.
2, a port insertion device 13 that receives the port members 4A, 4B and turns them 90 degrees and inserts them into the opening of the tubular film 2B, and a pair of left and right holding rods 14 that are inserted and positioned in the opening of the tubular film 2B. The opening holding device 15 having, and the port welding device 18 having the welding heads 16A, 16B and the cooling heads 17A, 17B that can be freely moved toward and away from each other at the upper and lower positions are located symmetrically with respect to each other across the transport path of the tubular film 2B. It is arranged.

Then, as shown in FIGS. 4 (a) to 4 (f), the tubular film 2B which has been conveyed with the opening kept open by the chuck 9a of the first conveying device 9 is processed in the next step. The port members 4A and 4B are attached. (1) The holding rod 14 is inserted into each opening of the tubular film 2B, and the port members 4A and 4B are inserted [Fig. 4 (a)], and the chuck 9a is inserted.
Open up. (2) The holding rods 14 are separated from each other (distance 1), and the tubular film 2B is tensioned in the width direction to perform positioning. [FIG. 4 (b)] (3) With the tubular film 2B in a tensioned state, the upper and lower welding heads 16A and 16B are brought close to each other,
[FIG. 5 (C)] First, the clamp blocks 19A and 19B are pressed against each other, and the tubular film 2B is applied to the outer peripheral portions of the port members 4A and 4B against the tension of the holding rod 14. As a result, the holding rods 14 are brought closer to each other by a distance corresponding to the welding margin. [FIG. 4 (d)] Next, after releasing the tension of the tubular film 2B by the holding rod 14, the heat blocks 20A, 20
B is pressed and contacted for a predetermined time to perform heat welding over the entire circumference of the port members 4A and 4B. (This is because when the tubular film 2B is heat-welded in a tensioned state, the tubular film 2B is broken from the melted portion and uniform welding cannot be performed.) [FIG. 4 (e)]
(6) The thermal welding is completed by separating the welding heads 16A and 16B. [FIG. 4 (f)] Next, the cooling heads 17A and 17B are slid to the positions of the welding heads 16A and 16B, and then brought close to each other and brought into contact with the heat-welded portion to perform cooling.

 Hereinafter, the details of the first welding device 5 will be described.

As shown in FIGS. 5 and 6, the distribution device 12 grips the port members 4A, 4B sent from the parts feeder 11 one by one at the imaginary line position by the chuck 21, and rotates the cylinder 22.
Thus, the rotating body 23 is configured to rotate 90 degrees in the arrow H direction about the vertical shaft 24.

The port insertion device 13 receives the port members 4A and 4B from the distribution device 12 to the clamp portion 24a in the hanging posture shown in phantom in FIG. 24 is rotated about the horizontal axis 26 in the direction of arrow I by 90 degrees to be in a horizontal posture, and the port cylinders 27 are configured to project and move the port members 4A and 4B to be inserted into the openings of the tubular film 2B. It

The opening holding device 15 is, as shown in FIGS. 8 and 9,
A pair of upper and lower slide rods 29 parallel to each other in the width direction of the tubular film 2B are fixed to the support body 28, and a pair of left and right movable bodies 31A via the slide cylinders 30 on the slide rods 29 on both sides of the support body 28, 31B is slidably arranged. These movable bodies 31A, 3
A holding rod 14 is projectingly provided on an upper portion of 1B via a retractable cylinder 32 and a guide rod 33, and a piston rod of a tension cylinder 34 provided on a support body 28 is connected to one movable body 31A. ing. In addition, both movable bodies 31A, 31
Rack members 35A, 35B along the slide rod 29 are attached to B, respectively, and a pinion 36 meshing with rack teeth 35a, 35b of both rack members 35A, 35B is rotatably arranged on a support body 28. . Therefore, by sliding one movable body 31A in the directions of arrows J and K by the tension cylinder 34, the other movable body 31B is opposed to the one movable body 31A via the rack members 35A, 35B and the pinion 36. It can be slid in the J'and K'directions. 37 is a release cylinder for releasing the tension of the tubular film 2B, which allows only the tension of the tubular film 2B (without breaking).
The clamp film 19A, 19B is pressed against the tension cylinder 34 that separates the holding rod 14 with various forces, and the tubular film 2
After positioning B, the movable cylinders 31A and 31B are moved closer to each other in the K and K'directions by the collar-shaped stopper 37a by contracting the release cylinder 37 with a force larger than the tension cylinder 34, and thus the tubular film 2B.
Release the tension. As a result, the heat block 20A, 20
Good heat welding can be performed without breaking the tubular film 2B when the B is pressed.

The port welding device 18 is, as shown in FIGS.
A pair of left and right upper lifting columns 38 and lower lifting columns 39 are vertically pierced through a substrate 41 through two slide members (linear motion bearer rings) 40, respectively. The book is integrated at the lower end through connecting members 42 and 43. On the base 44 below the substrate 41, the upper head 5 is placed via the elevating columns 38 and 39.
A head raising / lowering drive device 45 for raising and lowering the lower head 63 and the lower head 63 is provided. In this head lifting drive device 45, an upper horizontal shaft 47 and a lower water shaft 48 are rotatably arranged at the upper and lower positions of a portal frame 46, and the upper and lower horizontal shafts 47, 48 are interlocking gears 49A, which mesh with each other. It is linked and linked so that it can rotate in the opposite direction via 49B. One end of the L-shaped link 50 fixed to the upper horizontal shaft 47 is pin-connected to the piston rod 51a of the lifting cylinder 51, and the other end of the L-shaped link 50 is connected to the upper connecting member via the upper connecting rod 52. It is connected to 42. In addition, the free end of the drive lever 53 fixed to the lower horizontal shaft 48 has a lower connecting rod.
It is connected to the lower side connecting member 43 via 54. Therefore, the L-shaped link 50 is rotated by the elevating cylinder 51 to elevate the upper elevating column 38, and the drive lever 5 is moved through the upper horizontal shaft 47, the interlocking gears 49A, 49B and the lower horizontal shaft 48.
The lower lifting column 39 can be raised and lowered in the relative direction to the upper lifting column 38 by rotating the 3.

As shown in FIG. 2 and FIG. 3, left and right upper lifting columns 38
An upper head 58 is slidably arranged in the left-right direction (width direction of the tubular film 2B) via a linear guide 56 and an upper rail 57 at the lower part of the cross beam member 55 connected between the upper end parts. The head 58 is slid by an upper head switching cylinder 59 arranged on the cross beam member 55. Below the upper head 58, a welding head 16A and a cooling head 17A are arranged at predetermined intervals in the left-right direction.

On the other hand, the lower head 63 is slidable on the horizontal plate member 60 connected between the upper ends of the four lower lifting columns 39 via a pair of front and rear lower rails 61 and linear guides 62 arranged in the left-right direction. The lower head 63 is disposed and slid by the lower head switching cylinder 64 below the horizontal plate member 60. Then, on this lower head 63, each head 16A of the upper head 58,
A welding head 16B and a cooling head 17B are arranged to face 17A.

The welding heads 16A, 16B and the cooling heads 17A, 17B of the upper head 58 and the lower head 63 have substantially symmetrical structures, and each member of the upper head 58 will be described, and each member of the lower head 63 will not be described.

As shown in FIGS. 1 to 3, in the welding head 16A, clamp blocks 19A are arranged at the front and rear positions of the heat block 20A so as to be vertically movable. That is, the upper head 58
A heat block 20A having a heater 68 and a temperature sensor 69 built therein is vertically provided on the lower surface of the, and a semicircular recess 71 corresponding to the port members 4A and 4B is formed on the lower end pressure contact surface. The front and rear clamp blocks 19A are integrated by a base 72 at the upper end, and the heat block 20A is slidably fitted into a through hole 73 of the base 72, and left and right which are vertically penetrated by the upper head 58. The lower ends of a pair of lifting rods 74 are connected to a base 72 and supported so as to be lifted and lowered. Then, the compression spring 75 externally fitted to the lifting rod 74 between the upper head 58 and the base 72 urges it downward, and the stopper plate 76 between the upper ends of the lifting rod 74 contacts the stopper bolt 77. The press contact surface of the clamp block 19A before and after the semicircular concave portion 78 is formed is set below the press contact surface of the heat block 20A by a predetermined distance. Therefore, at the time of welding, first, the clamp block 19A is used to form the tubular film 2B.
Is pressed along the outer peripheral surfaces of the port members 4A and 4B, and then the heat blocks 65A and 65B are brought into pressure contact with each other. Since the clamp block 19A and the base 72 are close to the heat block 20A and may be heated, a cooling water hole 78 for circulating the cooling water after cooling the cooling head 17A is formed. . The cooling head 16A is composed of a cooling block 80 having a semicircular recess 79 formed on the lower pressure contact surface, and a cooling water hole.
81 and temperature sensor 82 are built in.

In the first welding device 5, the tubular film 2B carried in by the chuck 21 of the first transport device 9 is inserted into the opening portion by the holding cylinder 14 of the opening holding device 15 so that the holding rod 14 is protruded and tensioned. Rack member 35A by cylinder 34,
The holding rod 14 is moved away from each other via 35B and the pinion 36, and the port insertion device 13 inserts the port members 4A and 4B into the openings. Then, the head lifting drive device 4
The upper and lower heads 58 and 63 are brought closer to each other via the elevating and lowering columns 38 and 39 by the elevating and lowering cylinder 51 of 5, and first the front and rear clamp blocks 19A and 19B are pressed to position the tubular film 2B on the port members 4A and 4B for positioning. , Then heat block
20A and 20B are pressed together to perform heat welding. After the upper head 58 and the lower head 63 are lifted and separated from each other, the upper head switching cylinder 59 and the lower head switching cylinder 64 are operated to slide the upper head 58 and the lower head 63, respectively, to weld the port members 4A and 4B. Position cooling heads 17A, 17B
Face each other. Then, the lifting cylinder 51 causes the lifting column.
The upper head 58 and the lower head 63 are brought close to each other via 38, 39, and the cooling heads 17A, 17B are brought into contact with the welded portions of the port members 4A, 4B to cool them.

According to the above-mentioned embodiment, while arranging the clamp blocks 19A, 19B at the front and rear positions of the heat blocks 20A, 20B,
Clamp block 19A, 19A is first applied to position and fix the tubular film 2B to the outer peripheral portion of the port members 4A, 4B, and then the heat blocks 20A, 20B are brought into pressure contact, so that the tubular film 2B is attached to the port members 4A, 4B. A good welded portion can be obtained by reliably heat-sealing the outer peripheral portion of the. Moreover, the clamp block
Since 19A and 19B are cooled by the cooling water flowing through the cooling water hole 78A, they are not heated by the heat of the heat blocks 20A and 20B. Further, the cooling heads 17A and 17B are respectively provided on the upper and lower heads 58 and 63 in which the welding heads 16A and 16B are arranged, and the sliding heads can be slid to the left and right to perform rapid cooling, and there is no need to transport after heating. It is possible to prevent deformation and the like.

EFFECTS OF THE INVENTION As described above, according to the present invention, first, the clamp block positions the tubular film on both sides of the welded portion by pressing the tubular film on the both sides of the welded portion, and then the heat block heat-welds the entire circumference of the port member. As a result, the tubular film can be surely and satisfactorily heat-sealed without touching the heat block before the welding and melting or displacement of the tubular film as in the conventional case. In this way, the heat welding of the port member can be performed without any problems before the heat welding of the shoulder portion, so that after the shoulder portion is flatly welded, the unwelded portion of the opening is opened to three-dimensionally form the tubular film, As compared with inserting and welding, the shoulder portion can absorb a shift or the like, and a bag-shaped container without deformation can be obtained.

[Brief description of drawings]

The drawings show an embodiment according to the present invention, FIG. 1 is a partially cutaway perspective view of a welding head, FIG. 2 is a front view of a head portion of a first welding device, FIG. 3 is a sectional view of the welding head, Figure 4 (a)
(F) is a figure which shows the welding procedure of a port member, FIG. 5, FIG. 6 is a side sectional view and a semi-planar sectional view of a 1st welding apparatus,
FIG. 7 is a side sectional view of the lifting drive unit, FIGS. 8 and 9 are front sectional views and plan views of the opening holding device, and FIG. 10 is a diagram showing a manufacturing process of the bag-shaped container. 2B: Cylindrical film, 4A, 4B: Port member, 5: First welding device, 13: Port insertion device, 14: Holding rod, 15: Opening holding device, 16A, 16B: Welding Head, 1
7A, 17B …… Cooling head, 18 …… Port welding device, 19A, 19
B …… Clamp block, 20A, 20B …… Heat block,
31A, 31B …… Movable body, 32 …… Carrying cylinder, 34 …… Tensioning cylinder, 37 …… Return cylinder, 38 …… Upper lifting column,
39 …… Lower lifting column, 45 …… Head lifting drive, 49A,
49B ... interlocking gear, 50 ... L-shaped link, 51 ... lifting cylinder, 58 ... upper head, 59 ... upper head switching cylinder, 61 ... lower rail, 62 ... linear guide, 64 ... lower head Switching cylinder, 68 ... Heater, 69 ... Temperature sensor, 71 ... Recess, 72 ... Base, 74 ... Lifting rod, 75
...... Compression spring, 76 …… Stopper plate, 77 …… Stopper bolt, 78 …… Cooling water hole, 79 …… Recess, 80 …… Cooling block, 81 …… Cooling water hole.

Claims (1)

(57) [Claims] 1. A bag-shaped container manufacturing apparatus in which a resin port member is inserted into an opening of a tubular film and the port member and the opening are heat-sealed to seal the port member to the tubular film. A pair of welding heads having recesses corresponding to the port members formed on the press contact surface are arranged so as to be close to and away from each other across the welding position, and these welding heads are arranged in the length direction of the heat block and the port member of the heat block. It is composed of a pair of clamp blocks arranged at both ends, and these clamp blocks are provided so as to be movable in the pressure contact direction with respect to the heat block, and an urging means for urging the clamp block toward the pressure contact side is provided. Made of a bag-shaped container characterized in that the movement limit of the block is set so that the pressure contact surface of the clamp block is closer to the bonding position than the pressure contact surface of the heat block. Port member welding device in the apparatus.