JPH0789502A - Method for inserting container into film bag-making substance - Google Patents

Abstract

PURPOSE:To make finish of shrinkage neat with insertion made to a film bag-making substance that is slightly bigger than a container to be inserted in the length of circumferences by a method wherein an opening of the film bag-making substance is held open, with a pair of guides positioned facing each other, to a degree to which an insertion end of a tube container can be inserted, and the paired guides are inserted along the outer diameter of the container. CONSTITUTION:The circumferential length of a film bag-making substance 20 is set so that allowance to the outer peripheral length at its maximum of a container to be inserted can be set at the minimum. Holders 44A and 44B are put in the state of closing by operation of an air-operated actuator 42, and the film bag-making substance 20 is fed to a position where a pair of bag-making holding parts 45Ac and 45Bc of a pair of guides 45A and 45B and the front ends of a pair of spring plate materials 48A and 48B are covered with the opening. Then, the holders 44A and 44B are opened and the opening is held with the bag-making holding parts 45Ac and 45Bc. The opening is widened to an extent wherein an insertion end of a tube container can be put in, and the tube container is inserted therein. Thereby, the size of the film bag-making substance against the size of the container can be reduced to a great extent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting a container into a film bag product by opening the opening of the film bag product when shrink-wrapping the container with the film bag product.

[0002]

BACKGROUND OF THE INVENTION As is well known, shrink wrapping is accomplished by heat shrinking a container with a film bag product.
It is to be packaged. This shrink wrapping includes a bag manufacturing process for manufacturing a film bag product from a tubular film sheet, a container insertion process for inserting a container to be packaged into the manufactured film bag product, and the insertion of this container. And heating the film bag product to bring the film bag product into close contact with the entire surface of the container to obtain a packaging container.

In such a shrink wrap, the present invention relates to a container inserting step. Further, although there are various shapes for the container to be inserted, in the present invention, as the container to be inserted, it particularly extends in the longitudinal direction, one end of which is substantially circular and the other end is A flat shape having a major axis longer than the diameter of the circle and a minor axis shorter than the diameter of the circle is targeted. Here, one end having a substantially circular shape is abbreviated as a circular end, and the other end having a flat shape is abbreviated as a flat end. Also,
The container having such a shape will be referred to as a tubular container.

FIG. 6 shows a tubular container and a conventional method for inserting it into a film bag product. In FIG.
(A) is a front view showing only a tubular container,
(B) is a plan view showing the relationship between the tubular container and the film bag product into which it is inserted, and (c) is the right side showing the relationship between the tubular container and the film bag product into which it is inserted. It is a side view.

As shown in FIGS. 6A to 6C, the tubular container 10 extends in the longitudinal direction and has a circular end 1 with a radius R.
1 and a flat end 12 having a major axis length L ₁ and a minor axis length L _s , respectively. Here, the radius R, the major axis length L ₁ and the minor axis length L _s have a relationship of L ₁ >2R> L _s . In such a tubular container 10, the circular end 11 has an outer circumference of 2πR and the flat end 12 has an outer circumference equal to about 2 (L ₁ + L _s ).

A film bag product 20 'conventionally used for packaging such a tubular container 10 is as follows.
As shown in FIG. 6C, the outer periphery of the tubular container 10 is seen from the insertion direction of the tubular container 10, that is, the outer periphery when the tubular container 10 is viewed from the side of the circular end 11 or the flat end 12 (hereinafter, It has a dimension determined based on the projection outer circumference). In other words, the outer circumference of the film bag product 20 'was determined to be slightly longer than the projected outer circumference. The projected outer circumference is longer than the outer circumference length 2πR of the circular end 11 and the outer circumference length 2 (L ₁ + L _s ) of the flat end 12, and also the longest outer circumference length of the tubular container 10 (hereinafter, the longest outer circumference length). Note that it is considerably longer than this).

The film bag product 20 'has an opening 21' whose one end is open and the other end is closed. Conventionally, the tubular container 10 is inserted into the film bag product 20 'as described below.

That is, as shown in FIGS. 6 (b) and 6 (c), the opening 21 'of the film bag product 20' is sized so that the tubular container 10 can be completely accommodated by using the guide 30 '. Extend to In this state, the tubular container 10 is moved in the direction shown by the arrow in FIG. 6B to insert the tubular container 10 into the film bag product 20 '. This minimizes the contact between the tubular container 10 and the film bag product 20 '. A guide 30 for opening the opening 21 'during this insertion operation
´ is fixed and its position does not move.

[0009]

As described above, in the conventional container inserting step, if the container to be inserted is such that its shape changes in the inserting direction as shown in FIG. 6, it is inevitable. In addition, as the film bag product 20 ', it is necessary to use a film bag having a long perimeter as compared with the outer circumference (longest outer circumference) of the container.

Generally, the smaller the difference between the longest perimeter of the container and the perimeter of the film bag product, the better the finish of the product after shrinking due to the bag heating process. The reason for this is that printing deviation and deformation of the film surface of the film bag product are reduced. However, as mentioned above,
In the conventional container inserting step, the conventional film bag product 20 '
Since the outer peripheral dimension of the above must be determined with reference to the projected outer periphery, there is a drawback that the finished product after shrinking is not very good.

Accordingly, an object of the present invention is to provide a method for inserting a container into a film bag product which can improve the finish of the product after shrinking.

Another object of the present invention is to provide a method for inserting a container into a film-made bag product, which can be inserted in a state where the difference between the maximum outer peripheral length of the container and the peripheral length of the film-made bag product is small. is there.

Still another object of the present invention is to provide a method for inserting a container into a film bag product, which can accommodate a container whose shape changes in the inserting direction.

[0014]

According to the present invention, there is provided a method of opening an opening of a film bag product and inserting a container into the opening, wherein the opening of the film bag product is the container. While holding the pair of guides facing each other to such an extent that the insertion end of the container can be inserted, the step of opening the container into the film bag product, and the pair of guides to the outer shape of the container. And a step of inserting the container into the film bag-made product.

In the above inserting method, during the inserting step,
It is desirable to include a step of preventing the film bag product from coming off from the pair of guides by using a pair of flexible spring plate members that face each other in a state of intersecting the pair of guides.

According to the above insertion method, the perimeter of the film bag product can be determined based on the longest perimeter of the container.

The insertion method can be applied to the container whose shape changes in the insertion direction.

As an example of such a container, it extends in the longitudinal direction, one end thereof has a substantially circular shape, and the other end has a major axis length longer than the diameter of the circle and a minor axis length of the circle. There is a flat tubular container that is shorter than the diameter. In the case of this tubular container, it is preferable that the flat end be the insertion end.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1, 2 and 3, a packaging machine for realizing a method for inserting a container into a film bag-making product according to the present invention includes a packaging machine main body 41 and a packaging machine main body 41. A fixed air actuated actuator 42. The air-actuated actuator 42 includes a pair of reciprocating actuating plates 43A and 4A facing each other with the air-actuated actuator 42 interposed therebetween.
3B is reciprocally moved in the left-right direction in FIG. 1 symmetrically about the air-actuated actuator 42. A pair of holders 44A and 44B are fixed to the pair of reciprocating plates 43A and 43B by bolts, respectively.

A pair of guides 45A and 45B are provided at the lower ends of the pair of holders 44A and 44B so as to face each other.

The guide 45A is different from the holder 44A in that
1, a rod portion 45Aa held slidably in the left-right direction, a rotation preventing member 45Ab for preventing the rod portion 45Aa from rotating about its axis, and the other guide 45B of the rod portion 45Aa. It has a bag making holding portion 45Ac which is fixed to the end on the opposite side and holds the opening 21 of the film bag making article 20.

Similarly, the guide 45B prevents the holder 45B from rotating about the rod portion 45Ba which is slidably held in the left-right direction in FIG. 1 and the rod portion 45Ba. Anti-rotation member 45B
b and the opening 2 of the film bag product 20 fixed to the end of the rod portion 45Ba opposite to the other guide 45A.
1 and a bag-manufacturing holding portion 45Bc for holding 1.

Here, FIG. 1 shows an air-actuated actuator 4
2 shows a state in which the holders 44A and 44B are opened with the bag making holding portions 45Ac and 45Bc.
Is at the position shown by the solid line in FIG. When the holders 44A and 44B are closed by the air actuated actuator 42, the bag making holding portions 45Ac and 45Bc are in the positions shown by the broken lines in FIG.

Further, as shown in FIG. 2, the opening 21 of the bag-manufactured film product 20 has bag-manufacturing holding parts 45Ac and 4c.
Held by 5Bc. In FIG. 2, the film bag product 20 extends to the right. Therefore, in FIG. 1, the film bag-making product 20 extends in the upper direction of the paper surface, and a pair of bag-making holding portions 45Ac and 45Bc are provided.
Also protrudes upward in the plane of the drawing.

As shown in FIGS. 2 and 3, the tubular container 10 to be inserted into the film bag product 20.
Moves from the right side to the left side and is inserted into the film bag product 20. Therefore, in FIG. 1, the tubular container 10
Will move from the bottom to the top of the paper.

The pair of guides 45A and 45B are urged in a direction away from each other by a pair of springs 46A and 46B, respectively. These pair of springs 46A
The urging forces of 46B and 46B are respectively the rod portion 45Aa.
And 45Ba are adjusted by adjusting nuts 47A and 47B provided at mutually separated ends.

The upper spring plate member 48A and the lower spring plate member 48B facing each other in the direction intersecting the direction in which the pair of guides 45A and 45B face each other are the packaging machine body 41.
It is fixed to the fixed side by bolts or the like. The pair of spring plate members 48A and 48B are made of flexible thin plates. As will be apparent from the description below, the pair of spring plate members 48A and 48B allow the film bag product 2 to be inserted while the tubular container 10 is being inserted into the film bag product 20.
This is to prevent 0 from coming off from the pair of guides 45A and 45B.

As shown in FIG. 1, a pair of spring plate members 4
8A and 48B extend from the fixed end in a direction in which they are close to each other, and their tips (movable ends) are bent in the upper direction of the paper surface of FIG.

FIG. 2 is a right side view seen from the X direction in FIG. 1, and shows the opening 21 of the film bag product 20 through the pair of guides 4.
Bag making holders 45Ac and 45Bc of 5A and 45B
It shows the state before the tube-shaped container 10 is inserted into the film bag 20 and the tubular container 10 is inserted into the bag 20.

FIG. 3 is a right side sectional view as seen from the Y direction in FIG. 1, showing a state in which the tubular container 10 is being inserted into the film bag product 20.

FIG. 4 is a plan sectional view as seen from the Z direction of FIG. 3, and is a bag making holding portion 45Ac and 45Bc of the pair of guides 45A and 45B in the process of inserting the tubular container 10 into the film bag making product 20. Shows the behavior of.

FIG. 5 shows the bag-making holding according to the change of the container cross section in the inserting direction in the process of inserting the tubular container 10 as seen from the directions A, B, C, D, E and F of FIG. The behavior of the portions 45Ac and 45Bc and the pair of spring plate members 48A and 48B is shown.

A method for inserting a container into a film bag-made product according to the present invention will be described below with reference to FIGS. 1 to 5. Here, the perimeter of the film bag product 20 used in the present invention is determined based on the longest perimeter of the container to be inserted. That is, it is determined that the difference between the perimeter of the film bag product 20 and the longest perimeter of the container to be inserted is as small as possible. Further, as the container to be inserted, the case of the tubular container 10 described with reference to FIG. 6 will be described.

First, the holders 44A and 44B are closed by the air actuated actuator 42, so that the bag-making holding portions 45Ac and 45Bc of the pair of guides 45A and 45B are in the positions shown by the broken lines in FIG. .

In this state, the film bag product 20 is opened by the bag product expanding and conveying device (not shown), and the opening 21 of the film bag product holding portion 45Ac and 45Bc of the pair of guides 45A and 45B and the pair of springs. It is supplied to a position where it covers the tips of the plate members 48A and 48B. still,
For the configuration of the bag-making product expanding and conveying device, see, for example, Japanese Patent Application No. 3-206451.

After that, the holders 44A and 44B are opened by the opening operation of the air-actuated actuator 42, so that the opening 21 of the film bag product 20 is moved to the pair of guides 45A and Four
It is held in the bag making holding portions 45Ac and 45Bc of 5B.
The holding force at this time is given by the biasing force of the pair of springs 46A and 46B. At this time, the film bag product 2
The opening 21 of 0 is opened to the extent that the insertion end of the tubular container 10 can be inserted.

In this state, as shown in FIGS. 2 and 3,
Using the flat end 12 of the tubular container 10 as the insertion end, the tubular container 10 is moved leftward on the paper surface by an inserter (not shown) to be inserted into the film bag product 20.

In this inserting step, as shown in FIGS. 4 and 5, as the tubular container 10 is inserted into the film bag product 20, the distance between the pair of guides 45A and 45B becomes L ₁ → L. It changes so that it becomes narrower like ₂ → L ₃ . Therefore, the bag making holding portions 45Ac and 45Bc of the pair of guides 45A and 45B move along the outer shape of the tubular container 10.

In the inserting step, the contact surface pressure between the tubular container 10 and the film bag product 20 is as shown in FIG.
As shown in, the contact surface pressure gradually increases as f ₁ <f ₂ <f _3, and the contact surface pressure acts so as to pull out the opening 21 of the film bag-making product 20 from the bag-making holding portions 45Ac and 45Bc. In this embodiment, a pair of spring plate members 48A and 48B are arranged between the opening 21 of the film bag product 20 and the tubular container 10 in order to prevent the slipping out.
As a result, the pulling force for the film bag product 20 due to the contact surface pressures f ₁ , f ₂ , and f ₃ can be reduced. Therefore, the tubular container 10 can be normally inserted into the film bag product 20.

As described above, in this embodiment, the bag-making holding portions 45Ac and 45Bc for holding the opening 21 of the film-made bag-making product 20 are made smaller than the conventional ones, and the pair of guides 45A and 45A are inserted during the insertion of the container. 45B is movable. Further, the pulling force acting on the film-made bag product 20 during insertion of the container is reduced by disposing the pair of spring plate members 48A and 48B. As a result, compared to the conventional film bag product 20 ′ shown in FIG. 6, the size of the film bag product 20 with respect to the container size (width, that is, outer peripheral length).
Can be made much smaller (shorter). As a result, the amount of packaging material used can be reduced, and the economic effect is very large.

Further, in the present embodiment, the difference between the longest outer peripheral length of the container and the peripheral length of the film-made bag product can be minimized, so that there is also an advantage that the finished product after shrinking can be improved.

The insertion method of the present invention extends in the longitudinal direction, such as the tubular container 10, has one end having a substantially circular shape and the other end having a long axis longer than the diameter of the circle and a circle. A container having a flat shape with a minor axis shorter than the diameter of is very advantageous when inserting into a film bag product, but the container to be inserted is not limited to such a shape, It goes without saying that there is an advantage in inserting a container whose shape changes in the insertion direction.

[0044]

As described above, according to the present invention,
When opening the opening of the film bag product and inserting the container into this, use a pair of guides facing each other so that the insertion end of the container can enter the opening of the film bag product. , And the container is inserted into the film bag product along with the pair of guides along the outer shape of the container. Can be made smaller. As a result, the amount of the packaging material used can be reduced. Also,
Since the difference between the longest perimeter of the container and the perimeter of the film-made bag product can be minimized, there is also an advantage that the finished product after shrinking can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing a packaging machine for realizing a method for inserting a container into a film bag product according to the present invention.

FIG. 2 is a right side view seen from the X direction in FIG. 1, in which the opening of the film bag product is attached to the bag-making holding portions of the pair of guides, and the tubular container is inserted into the film bag product. It is a figure which shows the state before doing.

3 is a right side sectional view seen from the Y direction in FIG.
It is a figure which shows the state in which the tubular container is being inserted in the film-made bag product.

FIG. 4 is a plan cross-sectional view seen from the Z direction in FIG. 3, showing the behavior of the pair of guide bag making holding portions during the process of inserting the tubular container into the film bag product.

5 shows a pair of bag-making holders and a pair of bag-making holders according to changes in the insertion direction of the container cross section in the process of inserting the tubular container, as viewed from the directions A, B, C, D, E, and F in FIG. It is a figure which shows the behavior of a spring board material.

FIG. 6 is a view for explaining a conventional method of inserting a container into a film bag product.

[Explanation of symbols]

 10 Container 11 Circular End 12 Flat End 20 Film Bag Product 21 Opening 41 Packaging Machine Main Body 42 Air Actuator 43A, 43B Operating Plate 44A, 44B Holder 45A, 45B Guide 46A, 46B Spring 47A, 47B Adjustment Nut 48A, 48B Spring Plate material

Claims (6)

[Claims] 1. A method of opening an opening of a film bag product and inserting a container into the opening, wherein the opening of the film bag product can be inserted into the insertion end of the container. In, while holding using a pair of guides facing each other, a step of opening, the container into the film bag product, along the outer shape of the pair of guides, the step of inserting, A method for inserting a container into a film bag product containing the. 2. The film bag-making product is prevented from coming off from the pair of guides by using a pair of flexible spring plate members opposed to each other in a state of intersecting the pair of guides during the inserting step. The method for inserting a container into the film bag product according to claim 1, which comprises a step. 3. The method of inserting a container into a film bag product according to claim 1, wherein the perimeter of the film bag product is determined based on the longest perimeter of the container. 4. The method for inserting a container into a film bag product according to claim 3, wherein the shape of the container changes in the insertion direction. 5. The container extends in the longitudinal direction, one end thereof has a substantially circular shape, and the other end has a long axis longer than the radius of the circle and a short axis shorter than the radius of the circle. The method for inserting a container into a film bag-made product according to claim 4, wherein the container is a flat tubular container. 6. The method for inserting a container into a film bag-made product according to claim 5, wherein the flat end of the tubular container is the insertion end.