JPS644644Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention intermittently feeds out a packaging film, wraps it around a cylindrical bag-making body, forms it into a tube shape, and hangs it down, and by the closing movement of an opposing horizontal sealing machine. A bag making, filling and packaging device that seals in the width direction to form a bag and fills the bag with the object to be packaged. Specifically, a pair of ironing rods are closed and lowered to move the object to be packaged inside the bag downward. Concerning things to be packed and sealed.

<Prior Art> Conventionally, as shown in FIG. 8, this type of bag-forming-filling-packaging device has been equipped with approximately L-shaped support arms 1b', 1b' on which straining rods 1a', 1a' are horizontally disposed, respectively. The rods 5a of the opening/closing cylinder 5' are connected to the lower ends of the supporting arms 1b' and 1b' via connecting bodies 106' and 106', respectively, and are supported back to back on a lifting plate X that can be raised and lowered freely. A follower Z connected to the horizontal sealing machine 2' is engaged with a cam groove Y connected to the elevating plate
After closing a' and 1a', both side sealing machines 2',
2' closes and horizontally moves the follower Z, the cam groove Y and the elevating plate When the sealing machines 2', 2' are opened, the rod 5a' moves downward, opening both the ironing rods 1a', 1a', and returning them to the initial state.

<Problem to be solved by the invention> However, in such a conventional bag making, filling and packaging device, when the opening/closing speed of both side sealing machines changes in response to changes in the driving speed of the device, the opening/closing cylinder changes. It is necessary to adjust the operating timing to match the opening and closing operations of the ironing rod and the horizontal sealing machine, but if the opening and closing cylinder starts opening too early when the ironing rod is rising, and the ironing rod opens too early, the horizontal sealing machine will Not only does it have the problem of easily contacting the lower surface of the tip and causing damage, but conversely, when the rod is raised, the opening/closing cylinder starts opening too late, and if the opening of the rod is delayed, the rod will close. There is also a problem in that the packaging material cannot be filled during this time, and the speed cannot be increased.

In view of such conventional circumstances, the present invention aims to always keep the opening locus of the lifting rod constant.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to open and close a pair of straining rods that face the inside of both lateral sealing machines and sandwich the bag in the width direction. and are installed horizontally so that they can be raised and lowered freely, and are connected so that both lateral sealing machines close when both of the ironing rods are lowered, and an elastic machine that always biases both of the ironing rods in the open direction is provided. A closing mechanism is provided to close the ironing rods when they are lowered, and when both of the ironing rods reach near the lower limit position, the closing mechanisms are set in a non-operating state or are switched to a reverse operating state. This is characterized in that guide cams, in which a follower connected to each ironing rod slides in sliding contact in the opening direction, are arranged in parallel in the vertical direction, facing each other.

<Function> According to the above-mentioned technical means, the present invention makes the closing mechanism inactive or reversely operates when both of the tightening rods reach the lower limit position.
Each follower is pressed against the guide cam by a bullet, and both horizontal sealing machines open as the two ironing rods rise, and each follower rises while sliding in contact with the guide cam that opens in conjunction with this. By doing so, both of the pushing rods are gradually opened and moved.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, A is a bag making, filling and packaging apparatus. This apparatus A intermittently pays out packaging film 4 and wraps it around a bag making cylinder H to form a tube-like shape which hangs down. Below the bag making cylinder H, a pair of opposing horizontal sealing machines 2, 2 are installed horizontally so that they can be opened and closed freely, and a squeezing machine 1 is also provided.

The ironing machine 1 includes opposing horizontal ironing rods 1a, 1a arranged parallel to the seal bodies 2a ₁ , 2a ₂ of the two sealing machines 2, 2, and these two ironing rods 1a,
Support arms 1 supporting both ends of 1a and facing each other
b, 1b, an elevating arm 1c that pivotally supports both support arms 1b, 1b so as to be able to rise and fall, and a pair of rotating plates 1d, 1d that rotate both support arms 1b, 1b in opposing directions.

The lifting arm 1c is formed in a substantially U-shape in plan, has a lifting hole 101 vertically penetrated at its rear end, and has a column 9 erected behind the seal body 2a ₁ .
It is inserted loosely into the hole 101 and is pivotally supported.

At the front end of the lifting arm 1c, a support shaft 102 is provided at a symmetrical position with the tube-shaped packaging film 4 in between.
102 are provided to protrude horizontally in the sealing direction, and the pivot plates 1d, 1d are rotatably supported on these support shafts 102, 102, respectively.

The rotating plates 1d, 1d have their opposing sides formed into an approximately semicircular arc, and gears are engraved on each of the arcs to mesh with each other, so that when one of them rotates, the other rotates in conjunction with it.

In addition, locking pins 105, 105 for restricting the outward rotation of the supporting arms 1b, 1b are provided at symmetrical positions on the upper portions of both the rotating plates 1d, 1d, and protrude horizontally in the sealing direction. A connecting body 106 of a predetermined length is integrally fixed to the rotating plate 1d located on the side of the body _2a1 toward the rear, and the tip of the connecting body 106 is connected to the closing mechanism 5, in this embodiment, the closing mechanism 5. Connect to the rod 5a of the air cylinder.

A wing body 107 is provided protruding from the outer periphery of the lift hole 101 of the lift arm 1C, and the closing air cylinder 5 is attached to the wing body 107 so as to be tiltable.

In the case of this embodiment, the air cylinder 5 for closing is moved from the upper limit position C of the ironing rods 1a, 1a, where the upper end of the lifting arm 1c is located directly below the horizontal sealing machines 2, 2, when the horizontal sealing machines 2, 2 are closed. Shigoki rod 1a, 1
When descending to the lower limit position D of a, the connecting body 1
06 to be pushed up horizontally, and each time the tightening rods 1a, 1a descend and reach near the lower limit position D, the air supply to the closing air cylinder 5 is stopped to put it in a non-operating state or a reverse operating state. I am trying to switch to .

On the other hand, the support arms 1b, 1b have an L-shape such that their upper ends are located above the horizontal sealing machines 2, 2 at the upper limit position C, and are located below the horizontal sealing machines 2, 2 at the lower limit position D. At the same time, the lower arm 109 is connected to the supporting shafts 102, 102 with their lower arms facing away from each other.

In addition, the upper arms 108, 108 of the support arms 1b, 1b
Inner surfaces 6a of guide cams 6, 6, which will be described later,
Followers 7, 7, in this embodiment, rotatable rollers are provided, respectively, in sliding contact with 6a.

The opposing supporting arms 1b, 1b formed in this way are provided with bullets 8, 8, which constantly apply a rotational force in the rotational direction, between the rotating shafts 102, 102, respectively, and in this embodiment, torsion coils. With the interposition of springs, the lower arm 109 is swingably supported on the rotary plate 1d so that the lower arm 109 is horizontally aligned with the connecting body 106 when the elevating arm 1c is in the lowered state.

In this state, the upper arms 108, 108 receive an outward rotational force, and their outsides abut against the stop pins 105, 105, and are fixed in position.

Guide cams 6, 6 are fixed to opposite sides of the seal bodies 2a ₁ , 2a ₂ .

Each guide cam 6 has a length from an upper limit position C to a lower limit position D, and has opposing inner surfaces 6a formed in a _{substantially} arc shape. When 2a ₂ and the ironing rods 1a, 1a come into contact with each other, their inner circumferential surfaces substantially contact each other, and the roller 7 is formed so as to substantially contact the lower end of the inner circumferential surface.

An interlocking shaft 3a is arranged parallel to the seal body 2a 1 behind the column 9 at approximately the same height as the horizontal sealing machines 2, ₂ , and a rotating body 3b is attached to the shaft _3a. A long hole 301 is bored in the front part of the rotating body 3b in the longitudinal direction, and one end of the connecting rod 3f is connected to this long hole 301. At the same time, the other end is tiltably connected to a connecting part 111 provided at a position facing the wing body 107 of the lifting hole 101.

Further, the rear part of the rotating body 3b is rotatably connected to the upper part of the rod 302 of the drive cylinder 3c which is erected below and moves the lifting arm 1c up and down from the upper limit position C to the lower limit position D.

A rotating body 3d is pivotally fixed symmetrically and parallel to the rotating body 3b at both ends of the rotating shaft 3a, and one ends of connecting rods 3e, 3e are rotatably connected to both ends of the rotating body 3d. At the same time, each other end is rotatably connected to each side of the seal body.

At this time, the connection between the seal bodies 2a ₁ and 2a ₂ and the rotating body 3d and between the connecting rod 3f and the rotating body 3b by the connecting rods 3e and 3e is such that the lifting arm 1c is at the upper limit position in relation to the ironing machine 1. At C, the horizontal sealing machines 2, 2 are set to fully open, and at lower limit position D, the horizontal sealing machines 2, 2 are set to completely close.

The operation of the above embodiment will now be described.

As shown in Fig. 1, after the bag f is filled with the object to be packaged G, the rod 302 of the drive cylinder 3c retracts downward, causing the rotary body 3b to rotate outward, and the connecting rod 3f moves the lifting arm 1c reaches the upper limit position C,
At the same time that the horizontal sealing machines 2, 2 are opened to the maximum by the rotation of the rotating body 3d, each of the ironing rods 1a is opened to the maximum by the outward rotation of the support arm 1b by the bullet machine 8.

Immediately after that, at the time of transition to lowering, the connecting body 106 is pushed upward by the closing air cylinder 5 as shown in FIG. The horizontal sealing machines 2, 2 are kept open and the ironing rods 1a, 1a are closed, and the upper part of the packaged object G in the bag f is pressed. At this time, each support arm 1b receives an outward rotational force from the ammunition 8, but is blocked by the stop pin 105 and is fixed in position.

Next, as shown in Fig. 3, when the rod 302 of the drive cylinder 3c extends upward, the rotating body 3b pivoted on the rotating shaft 3a rotates inward, and the lifting arm 1c is lowered by the connecting rod 3f. At the same time, the iron rod 1a, 1
While closing by the upward extension of the rod 5a of the closing air cylinder 5, the bag f is lowered while being squeezed until it reaches the lower limit position D, and the horizontal sealing machines 2, 2 are moved by the rotation of the rotary body 3d. Completely close the bag f
is sealed to form a package F, and the horizontal sealing machines 2, 2 separate the package F.

When the tightening rods 1a, 1a reach the vicinity of the lower limit position D as shown in FIG. 4, the closing air cylinder 5
is in a non-operating state or switched to a reverse operating state, and the lifting arm 1c is raised by the lowering of the rod 302 of the drive cylinder 3c, and the horizontal sealing machine 2,
2 gradually opens, so the support arm 1 by the ammunition 8,8
As a result of the outward rotation of rollers b and 1b, each roller 7 rises while rotating along the inner surface 6a of the guide cam 6, and reaches the upper limit position C while gradually opening the ironing rods 1a and 1a.

Therefore, the operating locus of the straining rods 1a, 1a is the seventh
As shown in the figure, the sides form a roughly triangular shape.

Repeat the above operations.

In addition, in this embodiment, the connecting rod 3f is connected to the rotating body 3.
By connecting and fixing to the desired position of the elongated hole 301 b, the vertical movement distance of the ironing rods 1a, 1a can be adjusted via the elevating arm 1c, and the length of ironing can be adjusted depending on conditions such as the length of the package F. It is possible to change the degree as appropriate.

In addition, since the vertical movement of the straining rods 1a, 1a is performed by the lifting arm 1c which moves vertically along the vertical lifting column 9, the straining rods are moved by the engagement of the cam groove with the horizontally moving follower. Compared to conventional models that move up and down, it is possible to move up and down a larger distance, and the movement is smoother.
This makes it possible to increase the speed.

<Operations and Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

By making the closing mechanism inactive or switching it to reverse operation when both of the tightening rods reach the lower limit position, each follower is pressed against the guide cam by a bullet, and as both of the tightening rods rise, Then, both lateral sealing machines open and move, and each follower rises while slidingly contacting the guide cam that opens in conjunction with this, thereby gradually opening both ironing rods, so the opening movement trajectory as the ironing rod rises. can be kept constant at all times.

Therefore, compared to conventional models where the opening movement trajectory of the ironing rod is not constant, it is safer because the ironing rod and the tip of the horizontal sealing machine do not come into contact with each other and are damaged, and the opening movement of the ironing rod is smoother when the ironing rod is raised. Since there is no delay, the packaging material can be filled at the same time as the ironing rod is raised, and high-speed operation is possible.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of a bag making, filling and packaging device showing an embodiment of the present invention, showing the state immediately before the ironing rod is closed, and Fig. 2 is a longitudinal side view showing the state where the ironing rod is closed at the upper limit position. , Fig. 3 is a longitudinal side view showing a state in which the ladder rod has descended to the lower limit position while remaining closed; Fig. 4 is a longitudinal side view showing a state in which the ladder rod has been raised while opening with the opening of the horizontal sealing machine; Fig. 5 is a cross-sectional plan view along the - line in Fig. 1, Fig. 6 is a front view of the same, Fig. 7 is an operation diagram showing the operating locus of the ladder rod, and Fig. 8 is a conventional bag making, filling and packaging device. It is a partially enlarged side view which shows an example. A... Bag making, filling and packaging device, D... Lower limit position, H
... Cylindrical body for bag making, f... Bag body, G... Item to be packaged, 1a... Ironing rod, 2... Horizontal sealing machine, 4...
...Packaging film, 5... Closing mechanism, 6... Guide cam, 7... Follower, 8... Bullet machine.

Claims (1)

[Scope of utility model registration request] A packaging film is intermittently fed out, wrapped around a cylindrical body for bag making, formed into a tube shape and allowed to hang down, and sealed in the width direction by the closing movement of an opposing horizontal sealing machine to form a bag body. In a bag-forming-filling-packaging device for filling packages, a pair of ironing rods for sandwiching the bag body in the width direction are installed horizontally on the inside of the both horizontal sealing machines so as to be movable to open and close, and to move up and down. Both lateral sealing machines are linked together so that they close when the machine is lowered, and a spring is provided that always biases both of the ironing rods in the open direction, and a closing mechanism is provided that closes both of the ironing rods when they are lowered. When both ironing rods reach near the lower limit position, the closing mechanism is made inactive or switched to reverse operation, and a follower connected to each ironing rod is opened at the side end of both side sealing machines. A bag making, filling and packaging device characterized in that guide cams that slide in the direction are arranged vertically in parallel with each other facing each other.