JPH0999905A - Vertical type automatic wrapping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct transverse sealing at a high speed without causing lack of close contact in a wrapping film and generating wrinlkes in a transverse seal. SOLUTION: A long thermal melting wrapping film is guided to a molding chute 2 and folded in two along the longitudinal direction. Vertical sealing is carried out for formation of a tube by vertical thermal melting means 3, 3 which conducts longitudinal supply by joining both side ends. Transverse sealing is applied to this for formation of a bottom condition by transverse thermal melting rolls 4, 4 disposed on the downstream side of the vertical thermal melting means 3, 3 in the perpendicular direction. An article to be wrapped such as solids and powders are charged in it through the chute 2 and sealed, and a transverse thermal melting part is cut by a cutting means to manufacture an article to be wrapped. The respective transverse thermal melting parts 4, 4 incline in a range of 1-10 degree to the horizontal AO so that its axial center A1 on the wrapping film vertical seal part side VS may be higher and that on the anti-vertical seal side AS may be lower, and are formed in a spiral shape so that its seal part 41 may start sealing from VS and terminate at the anti-vertical seal side AS.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention introduces a long heat-fusible packaging film supplied in the longitudinal direction into a forming chute, folds it in half along the longitudinal direction, and joins both side edge parts together. , A tube-shaped packaging film is obtained by vertically sealing by means of a vertical direction heat-welding means for supplying in the longitudinal direction,
The horizontal heat welding means arranged on the downstream side of the vertical heat welding means sequentially performs horizontal sealing, and a solid or powdery or granular object to be packaged in a tubular packaging film having a bottom is formed by the molding chute. The present invention relates to a vertical automatic wrapping machine in which a packaged film is manufactured by filling the sheet with the sheet and then sealing the sheet and cutting the lateral heat-sealed portion of the wrapping film by a cutting means.

[0002]

2. Description of the Related Art As an automatic vertical packaging machine of this type, 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 half along the longitudinal direction by a bending tool (forming chute) 2 and the folded edge is a pair of vertical welding rolls (vertical heat welding means). It is sandwiched by 3 and 3 and is longitudinally welded while being longitudinally welded to form a tubular material F1, and a pair of horizontal rotary lateral welding tools (horizontal thermal welding means) are provided with the material F1 moving vertically downwards at required intervals. 4,
Lateral sealing is performed by means of 4, and after this sealing, powdered foods, chemicals, etc., to be packaged are supplied from the constant amount supply device 5 through the bending tool 2, and after the next horizontal sealing, the rotary cutter (cutting means) 7 is used for sealing. I try to cut the part.

In this vertical automatic wrapping machine, the folding tool 2 has an oval cross section whose width gradually increases from the upper part where the wrapping film F is folded in half to the middle part which guides the supply of the articles to be packed. The product to be packaged is smoothly supplied from the constant amount supply device 5 through the intermediate receiver 6 into the cylindrical material F1. Cylindrical material F containing a certain amount of items to be packaged
1 is then laterally sealed and sealed by the rotary transverse welders 4, 4. The rotary lateral heat welding tools 4, 4 are driven separately from the vertical heat welding rolls 3, 3, and, for example,
A suitable power coupling means C is provided between the shaft S4 of the lateral heat welding tools 4, 4 and the main shaft S1 side, and this is given once per one revolution of the shaft S3 by the starting means A provided on the cutter shaft S3. The joining means C is actuated to cause the welding tools 4 and 4 to seal, and at the same time, the welding tools 4 and 4 seal the tubular material F1 once to separate from the material F1 and at the same time release the joining means C to release the shaft. I am trying to stop S4.

[0004]

However, in the vertical automatic wrapping machine as described above, the rotary horizontal heat-welding tools 4, 4 are arranged horizontally, and a tubular material in which the article to be packaged is put in and slightly swollen F
When the lateral seal is linearly straightened against 1 in some cases, wrinkles sometimes occur in the lateral seal portion, which causes a defective lateral seal. In this case, the larger the bulge of the tubular material F1, the more likely it is that large wrinkles will occur. Cylindrical material F1
It is preferable to increase the bulge in order to increase the work speed of the packed work of the packaged work, and there is a problem with the conventional horizontal heat welding tools 4 and 4 in order to speed up the wrapping work. . Further, if the rotational speeds of the horizontal heat-welding tools 4 and 4 are increased in order to speed up the packaging work, sufficient time for lateral sealing cannot be obtained, and insufficient adhesion tends to occur.

The present invention has been proposed in view of the above-mentioned points, and does not cause insufficient adhesion in the packaging film and does not cause wrinkles in the lateral seal portion to speed up the lateral seal, It is an object of the present invention to provide a vertical automatic packaging machine that can speed up the work.

[0006]

In order to achieve the above-mentioned object, the vertical automatic packaging machine according to claim 1 of the present invention is provided with a long heat-welding packaging film, which is supplied in the longitudinal direction, on a forming chute. The tube-shaped packaging film is obtained by vertically guiding and folding it in half along the longitudinal direction, aligning both side edges, and vertically sealing the both side edges by means of the vertical heat welding means for supplying the longitudinal direction. In the vertical direction in the vertical direction by means of the horizontal heat welding means arranged on the downstream side of the vertical heat welding means in order to sequentially perform horizontal sealing, and to package the solid matter or the granular material in the bottomed tubular packaging film. Is filled through the molding chute and then sealed, and the transverse heat-welding portion of the packaging film is cut by a cutting means to produce a packaged product, wherein the transverse heat-welding means has an axis line thereof. But Inclination in the range of 1 to 10 degrees with respect to the horizontal so that the vertical side of the packaging film is on the top and the side on the side of which is the vertical is down, and at least a pair of seals starts sealing from the side of the vertical seal of the packaging film. It is characterized in that it is composed of a pair of heat welding rolls formed in a spiral shape that abut each other so as to end on the side of the vertical seal.

Here, when the tubular packaging film is pressed from the vertical seal portion side to the anti-vertical seal side in order, the tubular packaging film can be adhered smoothly without generating wrinkles, and conversely, the anti-vertical seal. When the wrapping film is sequentially pressed from the side toward 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 tilted so that the packaging film vertical seal side is on the upper side and the anti-vertical seal side is on the lower side, and the seal portion of the heat welding roll is sealed from the side of the packaging film vertical seal side to start the anti-vertical seal. Since it is formed in a spiral shape so that it ends on the side, even if a certain amount of the product to be packaged is inflated, the tube-shaped packaging film moves in the longitudinal direction and a sufficient transverse sealing time is secured, The spiral seal portion is sequentially pressed from the seal portion side to the anti-vertical seal side to smoothly and surely heat-weld without generating wrinkles. In this way, the transverse sealing is performed while moving the packaging film in the longitudinal direction to secure a sufficient sealing time, and the packaging work speed can be increased.

According to the second aspect of the present invention, the molding chute can have a large cross-sectional area such as a circle for the portion through which the article to be packaged passes. Here, if the cross-sectional area of the portion of the molding chute through which the packaged item passes is increased, the packaged item of solid matter or powder or granules can easily pass through, and the filling work speed can be increased and the packaged item of powdered substance can be increased. In the case of, it is possible to lengthen the time to calm down the objects that floated up by falling,
As a result, the packaging work speed can be further increased.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a vertical automatic packaging machine of the present invention will be described in detail below with reference to the accompanying drawings by way of embodiments. FIG. 1 is a vertical cross-sectional view of a vertical automatic packaging machine for powder and granular material according to the present invention, and FIG. 2 is a rear side press roll of the pair of transverse heat welding press rolls of the vertical automatic packaging machine shown in FIG. Front view of FIG. 3, FIG. 3 is III-II in FIG.
FIG. 4 is a cross-sectional view taken along line I, FIG. 4 is a front view of a front 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.

1 to 5, a vertical automatic packaging machine 1 according to the present invention is used for packaging various powders and solids.
First, the heat-welding packaging film F fed from the reel 11 is guided to the vertical forming chute 2 through the tensioning means 12 and folded in two along the longitudinal direction, and then,
After aligning both side edges of the folded packaging film F, these both side edges are vertically sealed by vertical direction heat welding means (a pair of vertical sealing heat welding rolls) 3 and 3, and the downstream side heat is applied. Welding means (a pair of heat sealing rolls for horizontal sealing)
Horizontally seal with 4 and 4 to make a bottomed state. The packaging film F is fed by the pair of vertical sealing heat welding rolls 3 rotated by a dedicated servomotor (not shown) via a drive shaft 31. Items to be packaged such as powder, which are constantly replenished from the hopper H, are sequentially introduced from the weighing plate 8 through the chute 2 into the tubular packaging film F1 having a bottom. Each time the horizontal sealing heat-bonding rolls 4 and 4 are operated, the tubular packaging film F1 is changed from a bottomed state to a sealed state after powder introduction,
The rotary cutting means 7 sequentially cuts at the lateral sealing portion of the packaging film F2.

The forming chute 2 has an upper half-folded portion 2
1. The packaged product introduction part 22 in the middle part, and the packaged product filling part 23 in the lower part. The portion through which the packaged product is passed, that is, the cross section from the packaged product introduction part 22 to the filling part 23 is substantially circular and greatly passes. The area. Increasing the cross-sectional area of the part through which the product to be packaged makes it easier for solid or powdery products to pass through, increasing the filling work speed and allowing powdered products to float up when dropped. It is possible to prolong the time for the food to settle, and as a result, the packaging work speed is further increased.

The heat-sealing rolls 4 and 4 for lateral sealing are symmetrical with respect to the tubular packaging film F1 sandwiched between them, and the axis A1 is inclined downward, for example, 3 degrees with respect to the horizontal A0. The bearing 45 is tilted and is rotatably supported by the bearing 45 via the drive shaft 46. The drive shafts 46 are integrally provided so as to project from the end faces of the rolls 4 and 4, and the rolls 4 are driven by the motor M1 via the speed reducer 51, the chain power transmission means 52, the gear power transmission means 53, and the universal joint 54. 4 is rotatably 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 and 3. Horizontal seal roll 4,
4 includes a seal portion 41 that abuts each other during lateral sealing work. The seal portion 41 has the same inclination angle as the bearing 45 so that the center line A2 when viewed from the front becomes horizontal in the roll mounted state. On the contrary, it is inclined.

Each of the horizontal sealing heat welding rolls 4 is formed by cutting from a cylindrical metal or casting finish cutting so that the circular flanges 42A and 42B at the front and rear ends and the seal portion 41 remain. The seal portion 41 starts the sealing from the packaging film vertical seal portion side VS and starts the anti-vertical seal side A.
It is formed in a spiral shape so that it ends with S, and the sealing portion 4
The sealing work surface 41B of No. 1 is formed in an arc so as to be able to roll and move with the other side, so that an unreasonable force is not applied to the packaging film F1. A hole 41A into which a heating element is inserted is formed along the axis A1 in the center of the seal portion 41, and the seal work surface 41B is silicon-baked in a grid pattern.

Thus, the tubular packaging film F1
Is the axis line A even if a certain amount of product to be packaged is inflated.
1 is sandwiched between the heat-sealing rolls 4 and 4 for horizontal sealing that are inclined so that the packaging film vertical seal side VS is on the upper side and the anti-vertical seal side AS is on the lower side.
1, 41 from vertical seal side VS to anti-vertical seal side A
It is gradually pressed toward S and is smoothly heat-welded without generating wrinkles. In this way, the transverse sealing is performed while moving the packaging film in the longitudinal direction to secure a sufficient sealing time, and the packaging work speed can be increased.

The rotary cutting means 7 has a horizontal bearing 71.
Supported by the heat-sealing roll 4 for horizontal sealing,
The gear driving force transmission means 53 of the rotary drive mechanism of No. 4 operates in synchronization with the moving speed of the packaging film via the rotary drive shaft 72 to perform cutting in the middle of the lateral seal portion.

In the above-mentioned embodiment, the inclination and diameter of the axis A1 of the heat-sealing roll 4 for horizontal sealing are set so that the lateral 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 the diagonal sealing is performed without causing wrinkles.

[0017]

As is apparent from the above description, according to the vertical automatic wrapping machine of the first aspect of the present invention, the axis of the heat welding roll is such that the packaging film vertical sealing portion side is up and the anti-vertical sealing side is down. Since the sealing part of the heat-sealing roll is spirally formed so that the sealing starts from the side of the packaging film vertical seal and ends on the side of the vertical vertical seal, Even if the product is filled and inflated, the tube-shaped packaging film is moved in the longitudinal direction while ensuring a sufficient lateral sealing time, and the spiral sealing part is sequentially pressed from the vertical sealing part toward the anti-vertical sealing side. It is possible to smoothly and reliably perform heat welding without generating wrinkles. Thus, the transverse sealing is performed while moving the packaging film in the longitudinal direction to secure a sufficient sealing time, and the packaging work speed can be increased.

According to the vertical automatic packaging machine of claim 2,
The molding chute has a large cross-sectional area, such as a circle, of the portion through which the packaged item passes, which makes it easier for solid items and powdered and granular items to pass through, and can increase the filling work speed and powder. In the case of the item to be packaged, it is possible to prolong the time for the item that has risen due to the fall to settle, and as a result, the packaging work speed can be further increased.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the external appearance of a vertical automatic packaging machine for powder and granules according to the present invention.

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

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

FIG. 4 is a front view of a front 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 same vertical automatic packaging machine.

[Explanation of symbols]

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

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[Procedure amendment]

[Submission date] January 10, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a vertical automatic packaging machine of the present invention will be described in detail below with reference to the accompanying drawings by way of embodiments. FIG. 1 is a vertical cross-sectional view of a vertical automatic packaging machine for powder and granular material according to the present invention, and FIG. 2 is a rear side press roll of the pair of transverse heat welding press rolls of the vertical automatic packaging machine shown in FIG. front view of, III-II in FIG. 3 FIG. 4
FIG. 4 is a cross-sectional view taken along line I, FIG. 4 is a front view of a front 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.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the external appearance of a vertical automatic packaging machine for powder and granules according to the present invention.

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

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

FIG. 4 is a front view of a front 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 same vertical automatic packaging machine.

FIG. 6 is a vertical cross-sectional view of a conventional vertical automatic packaging machine.

[Explanation of reference numerals] 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 sealing portion 7 cutting means A0 Horizontal line A1 Horizontal seal heat-welding roll axis A2 Seal center line AS Anti-vertical seal side F Packaging film F1 Tubular packaging film VS Vertical seal side

[Procedure 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

[Figure 5]

Claims (2)

[Claims] 1. A long heat-sealable packaging film supplied in the longitudinal direction is guided to a molding chute, folded in half along the longitudinal direction, and both side edges are joined to each other so that the longitudinal direction is supplied. Vertical sealing is performed by the vertical heat welding means to obtain a tubular packaging film, and the tubular packaging film is sequentially laterally sealed by the horizontal thermal welding means arranged on the downstream side of the vertical thermal welding means in the vertical direction. The bottom of the tube-shaped wrapping film is filled with the solid or powder granules to be packaged through the molding chute and then sealed, and the transverse heat-welded portion of the wrapping film is cut by a cutting means. In the vertical automatic packaging machine that manufactures a packaged product by means of the horizontal heat welding means, the horizontal heat welding means has a horizontal axis of 1 with respect to the horizontal so that the packaging film vertical seal portion side is on the upper side and the anti-vertical seal side is on the lower side. A pair that is inclined in the range of 10 degrees, and at least a pair of sealing portions are formed in a spiral shape that abut against each other so that the sealing starts from the packaging film vertical sealing portion side and ends at the anti-vertical sealing side. The vertical automatic packaging machine is characterized by being composed of the heat welding roll of. 2. The vertical automatic packaging machine according to claim 1, wherein the molding chute has a large cross-sectional area of a portion through which the article to be packaged is passed, such as a circle.