JP2772326B2 - Vertical automatic packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for guiding a long heat-sealing packaging film supplied in a longitudinal direction to a forming chute, folding the film along the longitudinal direction, folding the two sides together, and joining the both sides. , To obtain a tubular packaging film by vertical sealing by the vertical heat welding means for performing the longitudinal supply,
Horizontal sealing is sequentially performed by the horizontal heat welding means disposed downstream of the vertical heat welding means, and the solid or powdery material to be packaged is placed in the bottomed tubular packaging film by the forming chute. The present invention relates to a vertical automatic packaging machine which manufactures a packaged product by cutting the laterally heat-welded portion of a packaging film by a cutting means and sealing the package.

[0002]

2. Description of the Related Art As this type of vertical automatic wrapping machine, there is one disclosed in Japanese Patent Publication No. 47-50153, as shown in FIG. While moving the material film F made of a plastic resin in the longitudinal direction, the material film F is folded in two along the longitudinal direction by the bending tool (forming chute) 2, and the folded edge is a pair of vertical welding rolls (vertical heat welding means). A cylindrical material F1 is longitudinally welded while being moved in the longitudinal direction while being sandwiched between 3, 3 to form a cylindrical material F1, and the material F1 moving vertically downward is disposed at a required interval with a pair of horizontal rotating horizontal welding tools (lateral heat welding means). 4,
4. After the sealing, the packaged articles such as powdered foods and chemicals are supplied from the fixed quantity supply device 5 through the folding tool 2 after the sealing, and after the next horizontal sealing, the sealing is performed by the rotary cutter (cutting means) 7. The part is cut off.

In this vertical automatic wrapping machine, the cross-sectional shape of the folding tool 2 is an oval whose width gradually increases from the upper part where the folding of the packaging film F is performed to the middle part where the supply of the packaged goods is guided. The packaged product is smoothly supplied from the fixed quantity supply device 5 through the intermediate receiver 6 into the tubular material F1. Tubular material F containing a fixed amount of packaged goods
1 is then transversely sealed and sealed by rotating transverse welding tools 4,4. The rotary horizontal heat welding tools 4 and 4 are driven separately from the vertical heat welding rolls 3 and 3, for example,
A suitable power coupling means C is provided between the shaft S4 of the horizontal heat welding tools 4 and 4 and the main shaft S1 side, and the driving means A provided on the cutter shaft S3 is applied once per rotation of the shaft S3. The joining means C is actuated to seal with the welding tools 4 and 4, and at the same time the welding tools 4 and 4 seal the cylindrical material F1 once and separate from the material F1, the coupling means C is released and the shaft is released. S4 is stopped.

[0004]

However, in the vertical automatic wrapping machine as described above, the rotary horizontal heat welding tools 4, 4 are horizontally arranged, and the tubular material slightly expanded when the articles to be wrapped are put therein. F
When the horizontal sealing is performed at once in a straight line with respect to 1, wrinkles may sometimes be generated in the horizontal sealing portion, resulting in poor horizontal sealing. In this case, the larger the swelling of the tubular material F1, the more likely it is that large wrinkles are generated. Tubular material F1
It is preferable to increase the swelling in order to increase the operation speed of the filling operation of the article to be packaged in the packaging operation, and there has been a problem in increasing the speed of the packaging operation with the conventional lateral heat welding tools 4 and 4 as they are. . In addition, if the rotational speed of the horizontal heat welding tools 4 and 4 is increased to increase the speed of the packaging operation, the time required for the horizontal sealing cannot be sufficiently obtained, and insufficient adhesion tends to occur.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above points, and aims at increasing the speed of the lateral sealing without causing insufficient adhesion in the packaging film and without wrinkling in the lateral sealing portion. It is an object of the present invention to provide a vertical automatic packaging machine capable of speeding up operations.

[0006]

In order to achieve the above-mentioned object, a vertical automatic packaging machine according to the first aspect of the present invention is characterized in that a long heat-sealing packaging film supplied in a longitudinal direction is formed on a forming chute. The tubular packaging film is obtained by guiding and folding in two along the longitudinal direction, joining both side edges together, and vertically sealing the both side edges by the vertical heat welding means for supplying the longitudinal direction. In the vertical direction are sequentially sealed horizontally by the horizontal heat welding means arranged downstream of the vertical heat welding means, and the solid or powdery material to be packaged in the bottomed tubular packaging film. Is filled through the forming chute and then sealed, and the package is manufactured by cutting the laterally heat-welded portion of the packaging film by a cutting means. But The vertical seal portion of the packaging film is tilted in the range of 1 to 10 degrees with respect to the horizontal so that the vertical seal side is up and the anti-vertical seal side is down, and at least one pair of seals starts sealing from the packaging film vertical seal portion side And it is characterized by comprising a pair of heat welding rolls which are formed in a spiral shape and come into contact with each other so as to end on the side opposite to the vertical seal.

Here, when the tubular packaging film is sequentially pressed from the vertical seal portion side to the anti-vertical seal side, it can be smoothly adhered without generating wrinkles. When the packaging film is sequentially pressed from the side to the vertical seal side, the relative movement of the facing packaging films is restrained by the vertical seal portion, and wrinkles are concentrated on the vertical seal portion. Therefore, the axis of the heat welding roll is inclined such that the vertical seal portion side of the packaging film is up and the anti-vertical seal side is downward, and the sealing portion of the heat welding roll is started from the vertical seal portion side of the packaging film to start the anti-vertical sealing. Since it is formed in a spiral shape so that it ends on the side, even if a certain amount of articles to be packaged is expanded, the tube-shaped packaging film moves in the longitudinal direction while ensuring sufficient transverse sealing time to ensure vertical orientation. Heat is smoothly and reliably welded without being wrinkled by the helical seal portion sequentially pressing from the seal portion side to the anti-vertical seal side. In this way, the sealing time is sufficiently secured by moving the packaging film in the longitudinal direction while moving the packaging film in the longitudinal direction, and the packaging operation speed can be increased.

According to a second aspect of the present invention, the cross-sectional area of the molding chute through which the article to be packaged passes can be a large area such as a circle. Here, if the cross-sectional area of the portion of the molding chute through which the packaged product is passed is increased, the packaged product of solids and granular materials can easily pass, and the filling operation speed can be increased, and the powdered packaged product can be increased. In the case of, it is possible to lengthen the time for the thing soared by the fall to calm down,
As a result, the packaging operation speed can be further increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vertical automatic packaging machine of the present invention will be described in detail with reference to the accompanying drawings by way of embodiments. FIG. 1 is a longitudinal sectional view of a vertical automatic packaging machine for powder and granular materials according to the present invention, and FIG. 2 is a rear press roll shown in FIG. 1 of a pair of horizontal heat welding press rolls of the vertical automatic packaging machine. front view of, III-II in FIG. 3 FIG. 4
FIG. 4 is a cross-sectional view taken along the line I, FIG. 4 is a front view of a near-side heat welding roll of the same pair of lateral heat welding rolls, and FIG. 5 is a perspective view of a main part of the vertical automatic packaging machine.

Referring to FIGS. 1 to 5, a vertical automatic packaging machine 1 according to the present invention used for packaging various powders and solids.
First, the heat-sealing packaging film F unwound from the reel 11 is guided to the vertically long forming chute 2 via the tension means 12 and folded in two along the longitudinal direction.
After the two side edges of the folded packaging film F are aligned, these two side edges are vertically sealed by vertical heat welding means (a pair of heat sealing rolls for vertical sealing) 3, 3, and the downstream heat transfer is performed. Welding means (a pair of heat sealing rolls for horizontal sealing)
4 and 4 to seal horizontally to make a bottomed state. The feeding of the packaging film F is performed by a pair of vertical sealing heat welding rolls 3 and 3 which are rotated via a drive shaft 31 by a dedicated servo motor (not shown). The articles to be packaged, such as powders, which are constantly replenished from the hopper H, are sequentially introduced into the bottomed tubular packaging film F1 from the weighing plate 8 via the chute 2 by a fixed amount. For each operation of the horizontal sealing heat welding rolls 4, 4, the tubular packaging film F1 is sealed from the bottomed state after the introduction of the powder,
Rotary cutting means 7 sequentially cuts the packaging film F2 at the horizontal seal portion.

The forming chute 2 has an upper folded part 2
1. A packaged product introduction part 22 in the middle part and a packaged product filling part 23 in the lower part, and a part through which the packaged product passes, that is, a large cross section from the packaged product introduction part 22 to the filling part 23 with a substantially circular cross section. Area. Increasing the cross-sectional area of the part through which the packaged product passes allows easy passage of the solid or granular material to be packaged, which can increase the filling work speed, and in the case of the powdered package, soars by dropping It is possible to prolong the settling time of the waste, and as a result, to further increase the packaging operation speed.

The horizontal sealing heat welding rolls 4 and 4 are symmetrical with respect to the tubular packaging film F1 interposed therebetween, and each of the axes A1 is inclined downward, for example, by 3 degrees with respect to the horizontal A0. The bearing 45 is tilted by the bearing 45 and is rotatably supported by the bearing 45 via the drive shaft 46. Each drive shaft 46 is integrally protruded from an end face of each of the rolls 4, 4. The drive shaft 46 is driven by a motor M 1 via a reduction gear 51, a chain power transmission means 52, a gear power transmission means 53, and a universal joint 54. , 4 are rotationally driven so as to feed the packaging film F1 from top to bottom in synchronization with the feed speed of the vertical sealing rolls 3, 3. Roll for horizontal sealing 4,
4 are provided with a seal portion 41 which abuts each other at the time of the horizontal sealing operation. The seal portion 41 has the same angle as the inclination angle of the bearing 45 so that the center line A2 viewed from the front is horizontal in a roll mounted state. It is inclined on the contrary.

Each of the heat sealing rolls 4 for horizontal sealing is formed by cutting from a cylindrical metal or by casting and finishing so as to leave the circular flanges 42A and 42B at the front and rear ends and the seal portion 41. The sealing section 41 starts the sealing from the vertical sealing section side VS of the packaging film,
S is formed spirally so as to end with S
The first sealing work surface 41B forms an arc so as to be able to roll with the other side so that no excessive force is applied to the packaging film F1. A hole 41A into which a heating element is inserted is formed along the axis A1 at the center of the seal portion 41, and silicon sealing is baked on the seal work surface 41B in a grid pattern.

Thus, the tubular packaging film F1
Indicates that even if a certain amount of articles to be packaged is
The spiral sealing portion 4 is moved while being sandwiched between the horizontal sealing heat welding rolls 4 inclined such that the packaging film vertical sealing portion VS is up and the vertical sealing side AS is down.
1 and 41, the vertical seal portion side VS to the anti-vertical seal side A
It is sequentially pressed toward S and smoothly heat-welded without generating wrinkles. In this way, the sealing time is sufficiently secured by moving the packaging film in the longitudinal direction while moving the packaging film in the longitudinal direction, and the packaging operation speed can be increased.

The rotary cutting means 7 is provided with a horizontal bearing 71.
And a horizontal sealing heat welding roll 4,
The rotary drive mechanism 4 is operated in synchronization with the moving speed of the packaging film via the rotary drive shaft 72 from the gear power transmission means 53 to cut in the middle of the horizontal seal portion.

In the above embodiment, the inclination and diameter of the axis A1 of the heat sealing roll 4 for horizontal sealing are set so that the horizontal seal is orthogonal to the packaging film F1 in accordance with the moving speed of the packaging film F1. However, it goes without saying that the present invention is also applied to the case where sealing is performed without generating wrinkles in the oblique sealing.

[0017]

As is apparent from the above description, according to the vertical automatic packaging machine of the first aspect of the present invention, the axis of the heat welding roll is positioned such that the vertical seal portion side of the packaging film is up and the vertical seal side is down. Since the sealing portion of the heat welding roll is formed in a spiral shape so that the sealing starts from the vertical sealing portion side of the packaging film and ends on the side opposite to the vertical sealing side, a fixed amount of packaged Even if the product is inflated, the tube-shaped packaging film is moved in the longitudinal direction while securing sufficient horizontal sealing time, and is sequentially pressed by the spiral seal from the vertical seal to the opposite vertical seal. Thermal welding can be performed smoothly and reliably without generating wrinkles. Thus, the sealing time is sufficiently secured by moving the packaging film in the longitudinal direction while the packaging film is being moved in the longitudinal direction, and the packaging operation speed can be increased.

According to the vertical automatic packaging machine of claim 2,
The forming chute has a large area, such as a circle, for the cross-sectional area of the part through which the packaged product passes, making it easier for solids and granular materials to pass through, and increasing the filling operation speed and powder In the case of the items to be packaged, the time taken for the items soared by dropping can be prolonged and the packaging operation speed can be further increased.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the appearance of a vertical automatic packaging machine for granular materials according to the present invention.

FIG. 2 is a front view of the illustrated rear side press roll of a pair of horizontal heat welding press rolls of the vertical automatic packaging machine in FIG. 1;

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a front view of a near-side heat welding roll of the same pair of lateral heat welding rolls.

FIG. 5 is a perspective view of a main part of the vertical automatic packaging machine.

FIG. 6 It is a longitudinal section of the conventional vertical automatic packing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Automatic packaging machine 2 Forming chute 3 Vertical heat welding means (A pair of vertical sealing heat welding rolls) 4 Lateral heat welding means (A pair of horizontal sealing heat welding rolls) 41 Seal part 7 Cutting means A0 Horizontal line A1 Horizontal seal Axis line of heat welding roll for use A2 Center line of seal part AS Non-vertical seal side F Packaging film F1 Tubular packaging film VS Vertical seal side

Claims (2)

(57) [Claims] 1. A long heat-welding packaging film supplied in the longitudinal direction is guided to a forming chute, folded in two along the longitudinal direction, and both side edges are joined together. Vertical sealing is performed by the vertical heat welding means to be performed to obtain a tubular packaging film, and the tubular packaging film is sequentially horizontally sealed by the horizontal heat welding means arranged in the vertical direction on the downstream side of the vertical heat welding means. After filling the solid or granular material to be packaged into the bottomed tubular packaging film through the molding chute and sealing, the transverse heat-welded portion of the packaging film is cut by cutting means. In the vertical automatic packaging machine for producing packaged products, the above-mentioned horizontal heat welding means is arranged so that the axis thereof is horizontal with respect to the horizontal so that the vertical seal side of the packaging film is upward and the vertical seal side is downward. A pair formed in a spiral shape inclining in a range of 10 to 10 degrees, and at least a pair of seal portions contact each other so as to start sealing from the packaging film vertical seal portion side and end at the opposite vertical seal side. A vertical automatic packaging machine comprising a heat welding roll of (1). 2. The vertical automatic packaging machine according to claim 1, wherein said molding chute has a large cross-sectional area such as a circle in a portion through which the article to be packaged passes.