JPS6014647Y2 - automatic packaging machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a roll-type automatic packaging machine that performs sealed packaging by rotating vertical and horizontal roll sealers.

The length of sealed products packaged by automatic packaging machines may change depending on the type of product or the amount of material to be filled, but with conventional roll-type automatic packaging machines, the length of the bag will change unless the roll sealer itself is replaced. It was not possible to change the length.

In other words, since a normal automatic packaging machine uses one motor to rotate the vertical and horizontal roll sealers in conjunction with each other, the vertical and horizontal roll sealers rotate at the same speed, so changing the rotation speed of the sealer only changes the sealing speed. It is not possible to change the length of the bag.

Therefore, it was considered that the length of the bag could be varied by rotating the vertical roll sealer at a lower speed than the horizontal roll sealer using a transmission, but in this case, the horizontal sealing by the horizontal roll sealer was always at a constant speed. Because it is done,
If the vertical roll sealer performs vertical sealing at high speed, there will be excess packaging film or the horizontal roll sealer, and conversely, if the vertical sealer performs vertical sealing at low speed, the horizontal roll sealer will stretch the packaging film during sealing. Therefore, even with this method, it was not possible to vary the length of the bag.

In view of the above points, the present invention makes it possible to freely vary the rotational speed of the vertical roll sealer using a transmission, while rotating the horizontal roll sealer at the same speed as the vertical roll sealer only at the moment of sealing. Moreover, by rotating the horizontal roll sealer after sealing at a speed inversely proportional to the rotation speed of the vertical roll sealer, the length of the seal bag can be freely adjusted to length or short. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the main structure of an automatic packaging machine consisting of a pair of left and right vertical roll sealers 1, 1 and a pair of left and right horizontal roll sealers 2, 2.
On the peripheral surface of the packaging film A, there is provided an annular heating part 1a, which heat-welds the folded end A' side of the packaging film A folded in half by the forming member 3 from both sides to form a vertical seal A1 as shown in FIG. It is formed protrudingly.

4, 4 are rotating shafts of the i-roll sealers 1, 1, and a driven bevel gear 5 attached to the tip of one shaft 4 meshes with a driving bevel gear 6a attached to the tip of a vertical roll sealer drive shaft 6. ing.

Further, 7a and 7b are interlocking gears attached to both rotating shafts 4.4, and when the driving shaft 6 rotates due to the engagement of these two gears 7aw7b, both vertical roll sealers 1, 1 rotate relative to each other, and packaging A vertical seal A1 can be applied to the film A.

On the other hand, the left and right horizontal roll sealers 2, 2 provided opposite to each other on the lower side of the vertical roll sealers 1, 1 have heating portions 2a on their curved portions for performing horizontal sealing A2 on the packaging film A, respectively.
is installed protrudingly.

8, 8 are the rotation shafts of both sealers 2, 2, one rotation shaft 8
A driven bevel gear 10 that meshes with the drive bevel gear 9a of the horizontal roll sealer drive shaft 9 is attached to the tip of the drive shaft 9.
When the drive shaft 9 rotates, the meshing action of the interlocking gears 10a, 10b attached to both the rotation shafts 8.8 causes the roll sealers 2, 2 to rotate relative to each other, thereby causing the packaging film A to rotate as shown in FIG. A horizontal seal A2 like this can be applied.

In Fig. 1, 11 is the sealed packaging film A.
This is a pipe that supplies the filling material inside.

Further, in FIG. 2, the symbol P indicates a bag product sealed and packaged by vertical and horizontal roll sealers 1, 1, and 2.2.

Next, the structure of the drive device that applies rotational force to both the vertical and horizontal roll sealers will be explained based on the description in FIGS. 3 and 4.

In Fig. 3, the motor M is referred to as a drive source, 12 is a continuously variable transmission that changes the speed of the entire packaging machine, and 13 is a continuously variable transmission that changes the speed of the entire packaging machine. The first worm reducer for transmission is shown.

Further, the rotation of the input shaft of the first worm reducer 13 is transmitted to the second worm reducer 15 via the continuously variable transmission 14, and the driving force of the motor M reduced by this reducer 15 is as follows.
It is transmitted to the vertical roll sealer drive shaft 6 using a sprocket and chain 7, and rotates the vertical roll sealers 1,1.

In this case, the rotational speed of the vertical roll sealers 1, 1 can be freely varied by operating the continuously variable transmission 14 from the outside.

The main shaft 16 rotated by the motor M via the first worm reducer 13 is connected to a chain 717 and a sprocket 17a.
, 17b, the crankshaft 18 can be rotated in conjunction with each other, and a crank pin 18 is attached to the tip of the crankshaft 18.
The crank arm 18b to which a is attached is the attachment.

Reference numeral 19 denotes a screw shaft that can be rotated in forward and reverse directions.As a means for rotating the screw shaft 19, for example, as shown in FIG. There are two ways to do this: one is to rotate the screw shaft 19 in the forward and reverse directions, and the other is to rotate the screw shaft 19 in the forward and reverse directions by rotating the handle 22, as shown in FIG. 4, but this selection is completely free.

Next, 23 is a movable body attached to the screw shaft 19.
Rotating 9 in the forward direction will cause it to rise, while rotating it in the reverse direction will cause it to descend.

Reference numeral 24 denotes a slot shaft whose plate end side is rotatably mounted on the movable body 23 by means of bearings 25 a, 25 a. is located on the axis of the crankshaft 18.

25 is the crank arm 18 at the tip of the slot shaft 24.
A long hole 26 is bored in this slot 25, and the above-mentioned crank pin 18a is inserted into the long hole 26.

The slot shaft 24 of the crank pin 18a is connected to the crank shaft 18.
When the movable body 23 is raised by rotating the screw shaft 19 in the normal direction in the illustrated state, it is located exactly at the center of the elongated hole 26. However, if the screw shaft 19 is reversed and the movable body 23 is lowered, the insertion position can be moved to the tip side of the elongated hole 26.

27 is a sprocket attached to the slot shaft 24;
A chain 729 is hung between this sprocket 27 and the sprocket 28 attached to the drive shaft 9 for the horizontal roll sealer, and when the slotted shaft 24 rotates, the drive shaft 9 also moves in conjunction with the sprocket 28 attached to the drive shaft 9 for the horizontal roll sealer. By rotating, the horizontal seal A2 can be applied to the packaging film A.

In addition, both the heating parts 2a of the horizontal roll sealers 2, 2 are as follows:
Adjustments are made so that when the slot 25 is rotated to point just upwards as shown in FIGS. 3 and 4, it is aligned so that the horizontal seal A2 can be applied to the packaging film A.

Further, a sprocket is provided in the middle of the chain 729 to constantly apply tension to the chain 7, but this is omitted in the drawing.

Since the present invention has the configuration described above, it is desired to adjust the length of the bag product P sealed and packaged by the packaging machine which is currently operating normally in the conditions shown in Figs. 3 and 4 to be longer. In this case, first, the continuously variable transmission 14 is operated to quickly adjust the rotational speed of the vertical roll sealers 1, 1.

If this continues, the rotation speed of the horizontal roll sealers 2, 2 will be slower than the rotation of the vertical roll sealers 1.1, and there will be excess packaging film A on the horizontal roll sealers 2, 2, making it impossible to perform horizontal sealing properly. 21 or rotate the handle 22 to rotate the screw shaft 19 in the forward direction, and the movable body 2
Rise 3.

When the movable body 23 is raised, the slot shaft 24 and the slot 2
5 will also rise.

That is, FIG. 5 is an explanatory diagram showing the mutual relationship between the slot 25 and the crank pin 18a during normal operation, and when the slot shaft 24 and the slot 25 rise as described above,
The position of the crank pin 18a loosely fitted into the elongated hole 26 moves toward the base of the elongated hole 26 as shown in FIG. 6 when the slot 25 faces upward.

On the other hand, when the slot 25 is rotated downward, the crank pin 18a moves to the tip side of the elongated hole 26 as shown by the dotted line in FIG. When the horizontal roll sealers 2, 2 perform sealing, they rotate quickly, and conversely, after sealing is completed, the rotation can be slowed down.

In this way, when the rotational speed of the vertical roll sealers 1, 1 and the instantaneous sealing speed of the horizontal roll sealers 2, 2 are matched, the forward rotation of the screw shaft 19 is stopped, and from then on, if the operation is continued as it is, a long bag can be obtained. The products P can be packaged one after another.

In addition, when the length of the bag product P is sealed short, the continuously variable transmission 14 is operated to slow down the rotation of the vertical roll sealers 1, 1, and the screw shaft 19 is reversely operated to reduce the rotation of the movable body 2.
All you have to do is move 3 downwards.

Then, the slot 25 rotated by the crank pin 18a rotates at a low speed only at the moment when the horizontal roll sealers 2, 2 perform a horizontal seal, and then rotates at a high speed after the sealing, so that If the speed is matched to the rotational speed of the vertical roll sealers 1, 1, the horizontal roll sealers 2, 2 can sequentially perform horizontal sealing to seal short bag products P without stretching the packaging film A. I can do it.

In addition, the above-mentioned forward and reverse rotation operation of the screw shaft 19 is such that the horizontal seal A2 of the horizontal roll sealers 2, 2 with respect to the packaging film A is
It is sufficient to continue by eye until it is done correctly without loosening or stretching the film.

As mentioned above, the automatic packaging machine of the present invention does not require the troublesome work of stopping the operation and replacing the roll sealer each time the length of the bag product is changed, and instead operates the transmission to rotate the vertical roll sealer. By simply adjusting the speed to suit the length of the bag, and rotating the screw shaft appropriately to match the sealing speed of the horizontal roll sealer to the rotational speed of the vertical roll sealer, bags of any size can be created. The product is extremely easy to produce and is suitable for use in packaging various products.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a part of a roll sealer, Fig. 2 is a front view showing an example of a bag product, and Fig. 3 is a plan view of the structure of the main part. Figure 4 is a perspective view showing another embodiment of the main parts, Figure 5 is an explanatory diagram showing the positional relationship between the crank pin and the slot during normal operation, and Figure 6 is the bag product. FIG. 3 is an explanatory diagram showing the positional relationship between the crank pin and the slot when the crank pin is sealed for a long time. 1... Bent vertical roll sealer 2... Bent roll sealer, M... Motor, 14... Transmission, 1
8... Crank shaft, 18a... Crank pin, 19... Screw shaft, 23... Movable body,
24... Slot shaft, 25... Slot, 26... Elongated hole.

Claims (1)

[Scope of utility model registration request] In an automatic packaging machine that uses a single motor to rotate vertical and horizontal roll sealers for sealed packaging, the rotational speed of the vertical roll sealer driven and rotated by the motor is configured to be variable using a transmission. A movable body that moves up and down by forward and reverse rotation of the screw shaft is attached to a screw shaft configured to be freely rotatable, and a slot shaft with a slot installed at a right angle at the tip is rotatably attached to this movable body. , Insert the crank pin of the crankshaft rotated by the motor into the elongated hole bored in the slot so that the slot shaft can rotate in conjunction, and determine the insertion position of the crank pin in the elongated hole. , characterized in that the movable body is configured to be able to move in a disengagement direction with respect to the slot axis based on the vertical movement of the movable body, and the horizontal roll sealer is configured to rotate in conjunction with the rotation of the slot axis. Automatic packaging machine.