JPS59163124A - Sealing device for cylindrical bag in bagging packer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to, for example, transporting a cylindrical film formed into a cylindrical shape from an expander that opens the cylindrical film into a bag shape by gripping both edges of the cylindrical bag with clamp members. The cylindrical film is then cut to a predetermined length and the cut portion is sealed to form a bag.The opening of this packaging bag is expanded, the contents are put in there, and the opening is tied. The present invention relates to a device for sealing the cut portion of the cylindrical bag pulled out by a clamp member in a bagging and packaging machine for fruits and vegetables that is discharged by a clamp member.

An object of the present invention is to attach a support stand equipped with a clamping plate to each of a pair of endless rotating members such as chains installed along the transfer direction of a clamp member, and to control the rotation of both endless rotating members. The holding plates periodically clamp the cylindrical bag and heat-seal it by moving the support bases closer to each other, resulting in a simple structure, and there is no stretching of the cylindrical bag due to the transfer of the clamp member during heat-sealing. It is an object of the present invention to provide a sealing device that can perform smooth heat sealing and also facilitates continuous operation.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a clamp member 2 having a gripping portion 2a is supported between a main chain 1 serving as a conveying mechanism that is stretched on both left and right sides. , the main chain 1 is rotated via a drive shaft 3 shown in FIG.

The clamping member 2 is turned from an upright position shown in phantom lines in FIG. 2 to a horizontal position shown in solid lines in the figure. At this time, the expander 4 that opens the opening of the cylindrical film F into a half-open state exhibiting an elongated rectangle by means of the supporting leg plate 4a to form a cylindrical bag f is also integrated with the clamp member 2 as shown in FIG. The direction is changed from the upright state shown by the imaginary line to the horizontal state shown by the solid line in the figure. When the clamp member 2 and the expander 4 are connected, the gripping part 2a grips both mouth edges fl and f2 of the cylindrical bag extending outward from the supporting leg plate 4a, and after the direction change, the second As shown in the figure, when the clamp member 2 is transferred by the main chain 1 and separated from the expander 4, the cylindrical bag f is pulled out from the expander 4.

As shown in FIGS. 1 and 2, both main chains 1
There is a driven chain 5.6 as an endless rotating member on the outside of the
A pair of upper and lower sprockets are provided and spanned between the sprockets 7. A base plate 8 is supported below the driven chain 5.6 so as to be movable along a rail 9 in the same direction as the direction in which the clamp member 2 is transferred. Supports 10 are erected on both left and right sides of the base plate 8 in close proximity to the inside of the driven chain 5.6. A pair of upper and lower movable cylinders 11 and 12 are inserted into both branches 10, and the upper movable cylinder 11 is attached to the upper endless driven chain 5, and the lower movable cylinder 12 is attached to the lower endless driven chain 5. It is attached to the endless driven chain 6. As for the positional relationship between these moving cylinders 11 and 12, as shown in FIG. 1, when the upper moving cylinder 11 is located on the upper track of the upper driven chain 5, the lower moving cylinder 12 It is located on the lower track of the driven chain 6. Therefore, both vertically movable cylinders 11 and 12
move up and down along the support column 1o as both driven chains 5 and 6 rotate, and move toward and away from each other periodically.

Of the upper and lower movable cylinders 11 and 12 inserted into the two branches 10, a support stand 13 is installed between the two upper movement cylinders 11, and gate-shaped portions 13a are formed on both left and right sides of the support stand 13.
A cutter mechanism is mounted on the sandwiched part. As shown in FIG. 2, this cutter mechanism includes a cutter 14 which is always urged by a spring 15 in the direction of the arrow A, that is, the direction to be cut, and a cutter 14 that is urged against the urging of the spring 15 in the direction of the arrow A, that is, in the direction opposite to the direction of the arrow A. The solenoid 16 is configured to move downward in the cutting direction. Also, on the inside of this cutter 14, that is, on the side in the transfer direction of the clamp member 2, a clamping plate 17 is provided on the lower side of the support base 13 in correspondence with the cutter 14, and is always held in place by a spring 18.
It is attached and biased in the direction of the arrow. On the other hand, a similar clamping hot plate 20 is attached to a support stand 19 installed between both lower movable cylinders 12, facing the upper clamping plate 17.

As shown in FIG. 1, when the upper movable cylinder 11 is located on the upper track of the upper endless driven chain 5, the cutter 14 and the upper clamping plate 17 are at the highest position, and the lower Endless driven chain 6 with moving tube 12 at the bottom
2, the lower clamping heat plate 20 is at its lowest position, allowing the clamp member 2 to pass between them as shown in FIG. After the clamp member 2 has passed, as shown in FIG.
2 moves along the outer periphery of the sprocket 7 from the lower track to the upper track of the lower driven chain 6, the cutter 14 descends, the upper and lower holding plates 17, 20 close, and the cutter 14 is pulled out from the expander 4. The cylindrical bag f is held by both clamping plates 17, 2.
0 and sealed by heat. Almost at the same time as this heat sealing, the portal portion 13a of the upper support base 13 is
The limit switch 21 for cutter operation is turned on, the solenoid 16 of the cutter mechanism is activated, and the cutter 14 moves downward in the direction of arrow A against the bias of the spring 15, thereby reducing the heat of the commercial bag f. Cut near the seal part.

The cylindrical bag f cut to a predetermined length in this manner becomes one packaging bag, and the gripping portion 2a of the clamp member 2 and both clamping plates 17. , 20. When the clamp member 2 is transferred in this state, the gate-shaped portion 13a of the upper support base 13 is connected to the limit switch 21 for cutter operation.
, the switch 21 is turned OFF, and the cutter 14
moves upward in the direction of arrow A due to the bias of spring 15.

Thereafter, when the clamping plates 17 and 20 are separated again as the movable cylinder 1'1. can be entered. On the other hand, after cutting, the next cylindrical bag f is set and held in the expander 4 as in the case described above, and the expander 4 is returned to the upright state shown by the imaginary line in FIG. Then, the next clamp member 2 is lowered toward this expander 1, and continuous operation is performed.

As shown in FIGS. 1 and 2, gears 22 are supported on the same axis on the outside of the sprocket 7, around which the upper and lower driven chains 5 and 6 are stretched, and the upper and lower gears 2 that face each other are supported on the same axis.
2 are intermeshed with each other.

A gear 23 is meshed with one of the upper gears 22,
The left and right gears 23 are interlocked by a connecting shaft 24. A sprocket 25 is supported coaxially with one of the gears 22 that are meshed with the left and right gears 23 . As shown in FIG. 3, the drive shaft 3 of the main chain 1 is interlocked with a sprocket 27 via a clutch 26, and an interlocking chain 28 is stretched between the sprocket 27 and the sprocket 25. This interlocking chain 28 is interlocked with a scale plate 30 via a sprocket 29.

On the other hand, as shown in FIG. 2, the rotation of the connecting shaft 24 is transmitted via a gear 31 to a gear 33 on the same axis as the operating shaft 32. 33, and the rotation of this gear is controlled by the operation shaft 3.
Not transmitted to 2. When the operating shaft 32 is pushed against the bias of the spring 34, the operating shaft 32 and the gear 33 are connected. Further, as shown in FIG. 1, a limit switch 35 for stopping the main chain 1 is provided near one of the main chains 1.
As shown in FIG. 4, it is turned on as the clamp member 2 is transferred. In addition, the mouth limit switch 3
5 is designed to operate only when a button switch (not shown) on the control panel is turned on. When this limit switch 35 is turned on by the clamp member 2, the main chain 1 stops rotating, the clamp member 2 stops at that position, and the clutch 26 on the drive shaft 3
is broken, and the rotation of the driven chains 5 and 6 is stopped.

Now, when adjusting the cut length of the cylindrical film F, as mentioned above, turn on the button switch in advance to enable the limit switch 35 for stopping the main chain, and then use the clamp member 2 to set this limit. The switch 35 is turned on to stop the clamp member 2 and the clutch 26 is disengaged. When the clutch 26 is disengaged, the driven chains 5 and 6 can be rotated independently regardless of the main chain 1. Therefore, when the operating shaft 32 is pushed and connected to the gear 33 and manually slowed down, the rotation is transmitted via the gear 31, the connecting shaft 24, the gear 23, the gear 22, and the sprocket 7 to the upper and lower driven chains 5 on both the left and right sides. ,6
Therefore, the driven chain 5.6 can be freely rotated manually. Therefore, by rotating the driven chains 5 and 6 independently with respect to the stopped main chain 1, the position of the movable cylinder 11.1'2 is changed,
The relative positional relationship between the clamp member 2 and the cutter mechanism can be changed. This rotation of the driven chain 5.degree.6 is transmitted to the scale plate 30 via the sprocket 25, the interlocking chain 28, and the sprocket 29, and the necessary cutting length can be arbitrarily selected by looking at the scale plate 30.

For example, if you want to make the cut length longer than L shown in Figure 4, you can cut the driven chain 5°6 by itself as described above.
Rotate in the direction of the arrow. Then press the button switch C)
When the main chain 1 is rotated by turning the FF to disable the limit switch 35, the cylindrical bag f is turned off as described above.
is held between the two holding plates 17 and 20, and that portion is heat-sealed, and at the same time it is cut using the cutter 14. At that time, the clamp member 2 has already been moved to the P1 position shown by the imaginary line in FIG. 4, so the cut length is longer than the cut length.

On the other hand, if it is desired to shorten the cut length, the driven chain 5.6 is rotated independently in the direction of the arrow C, contrary to the case described above. In this case, the clamp member 2 is at the P2 position (not shown by the imaginary line in FIG. 4) during heat sealing by the clamping plates 17 and 20 and cutting by the cutter 14, and the cut length is shorter than the cut length.

Note that heat may be applied to both of the holding plates 17 and 20.

The present invention described above relates to the mouth edge fl of the cylindrical bag f.

a conveying mechanism 1 such as a chain that conveys the clamp member 2 that grips and pulls out the clamp member 2; a pair of endless rotating members 5 such as chains that are installed along the conveying direction of the clamp member 2;
6 and the supporting stands 13.19 respectively attached to the both endless rotating members 5.6, and as the supporting stands 13.19 approach and separate as the endless rotating members 5.6 rotate, Since it is composed of a pair of clamping plates 17 and 20 that periodically clamp and heat-seal the drawn-out cylindrical bag r,
Not only does the structure of the sealing device become very simple, but both the clamping plates 17 and 20 move along the transfer direction of the clamp member 2 while holding the cylindrical bag f, and the cylindrical bag f is attached to the clamp member during heat sealing. 2 prevents the clamp member 2 from being stretched in the direction of transfer, thereby achieving the effect that smooth heat sealing can be performed as the clamp member 2 is transferred. Also, both clamp plates 1
1.20 periodically clamps the cylindrical bag f, which also has the effect of making continuous operation much easier.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a seal cutting device according to an embodiment of the present invention, seen from the front side, Fig. 2 is a cross-sectional view of the same, seen from the side side, and Fig. 3 is an interlocking mechanism from the main chain to the driven chain. FIG. 4 is a sectional view showing the seal cutting action and the length adjustment action of the cutter. Main chain (transport mechanism) 1, clamp member 2, expander 4, driven chain (rotating member) 5, 6, base plate 8, rail 9, support 10, movable tube 1'1.12, support base 13, cutter 14, spring 15, solenoid 16, clamping plate 17, spring 18, support stand 19, clamping plate 20, cylindrical film F, cylindrical bag f10 edge f1. f2゜

Claims (1)

[Scope of Claims] 1. A conveying mechanism (1) such as a chain for transporting a clamp member (2) that grasps and pulls out the mouth edge (fl, f2) of a cylindrical bag ("); and the clamp member ("). 2) a pair of endless rotating members (5° 6) such as chains installed along the transfer direction, and support stands (13, 19) attached to both the endless rotating members (5, 6), respectively. The drawn out cylindrical bag (f) is periodically clamped and heated by the approach and separation of both support stands (13, '19) as the endless rotating members (5, 6> rotate). A pair of clamping plates (17, 20) for sealing
A sealing device for a cylindrical bag in a bag filling and packaging machine, characterized by comprising: