JPH0317694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a bag-making machine for flexible film-like materials, and more particularly to a bag-making, filling and packaging machine mainly represented by horizontal or vertical pillow packaging machines. Strip-shaped packaging materials (synthetic resin films, aluminum foils, paper, nonwoven fabrics, and other flexible laminate materials made by pasting these materials together) are placed on the packaging line of the machine and are supplied continuously or intermittently. The present invention relates to a bag making machine that manufactures a cylindrical bag body by gradually forming (folding and guiding) a cylindrical web into a cylindrical shape.

BACKGROUND TECHNOLOGY A bag making machine, commonly called a former, is installed at a required part of a bag making line, for example, in the case of a horizontal pillow packaging machine, at the feeding junction of the packaging material and the work to be packaged. There is. Regardless of whether the film-like material is supplied continuously or intermittently, during the supply, both edges of the film-like material are gradually folded upward or downward (forming guidance) to gradually form a cylindrical shape. It is designed to form a bag body. Regarding this kind of bag making machine, for example, Jikosho
As disclosed in Publication No. 56-33705 and Publication of Utility Model Application No. 57-103830, the "box type" type is generally used, and the film guide is formed into an airfoil shape using thin plate material. The packaging material is folded and guided along the board.

Problems to be Solved by the Invention However, in this type of conventionally known bag making machine, since the material completely contacts and slides against the film guide plate, the folding resistance (bag making resistance) is high. This inevitably increases the size, which makes it difficult to properly fold various materials, which limits the speed of packaging operations in packaging machines. In other words, when the packaging material is folded and guided by the film guide plate, it is pulled with a considerably large force in the feeding direction, and for this reason, a synthetic resin material with relatively high ductility and flexibility is unnecessarily stretched. It has the disadvantage that it stretches a lot, and hard paper, aluminum foil, etc. with low ductility may tear.

In addition, any material may have streaks or crease lines as if it were permanently processed, which can cause the material to break or the side edges of the seal to be separated, causing the seal to fail. This also led to situations such as defects. Therefore, in order to avoid the above-mentioned troubles, it is a reality that the feeding speed of the material, that is, the packaging speed is slowed down.

In addition, conventional bag making machines have the disadvantages mentioned above, but also have disadvantages such as being heavy and increasing production cost.

Purpose of the Invention The present invention has been proposed in order to suitably solve the various drawbacks inherent in the bag making machine for film-like materials described above, and it guides the film-like material smoothly and at high speed. The purpose is to provide a means that can reduce the weight of the vehicle.

Means for Solving the Problems In order to overcome the above problems and achieve the intended purpose, the present invention aims to form a flexible film material fed along a bag making line into a cylindrical shape while guiding the forming process. A bag making device for making bags, which extends symmetrically in a direction substantially perpendicular to the bag making line, and bends the material toward the bag making line and guides the material in the feeding direction. a front guide rod for guiding the folding of the material; and a front guide rod disposed on both sides along the bag making line so as to gradually approach each other or intersect with each other as the material advances along the feeding line, while folding and forming the material into a cylindrical shape. It consists of a pair of left and right lateral guide rods for guiding, and at least the portions of these front guide rods and lateral guide rods that fold and guide the material are formed of rod-shaped materials having circularly curved surfaces, and at least the left front guide rod and the lateral guide rods It is characterized in that the rod and the front guide rod and the side guide rod on the right side are connected in a frame-like manner.

Embodiments Next, a preferred embodiment of the flexible film material bag making device according to the present invention will be described below with reference to the accompanying drawings.

Before explaining the bag making machine according to the embodiment, various shapes of cylindrical bags formed by the horizontal pillow packaging machine will be explained. For example, the gassho patch bag shown in Figure 17
F ₃ is a cylindrical bag body f ₃ having a horizontally long oval cross section, and along the center of the upper surface (or lower surface in some cases), both side edges f for sealing are aligned in a palm-like shape, and the both side edges f , f. In addition, the one-sided gassho patch bag F′ ₃ shown in FIG.
It has the same form as the gassho patch bag _F3 shown in Figure 7,
Both side edges f', f', which serve as seals, are formed on the upper surface of the bag body _f'3 at positions offset to one side from the center. Furthermore, as shown in FIG. 19, on the top or bottom surface of the bag body f ₃ ″, both side edges f″, which serve as seals,
There is also an envelope sticker F ₃ '' in which a seal is formed after f '' is overlapped inside and out and above and below.

Here, the two gassho patch bags F ₃ and F ₃ ' are the second
As illustrated in FIGS. 0a and 0b, both sides of the strip material F are folded inward, and side edges f and f' serving as seals are formed while being opposed to each other and formed into a cylindrical shape. However, in the case of the one-sided gassho paste bag F ₃ ', the side edges f' and f' are formed on one side. Further, as illustrated in FIGS. 21a and 21b, the envelope sticker F ₃ ″ has both sides of the strip material F folded inward, and the side edges f″,
f'' are formed into a cylindrical shape while being overlapped inside and outside each other.

In the examples, each bag making machine used for the various shaped cylindrical bags mentioned above will be illustrated and each bag making machine will be explained in detail. It should be noted that all bag making machines are basically configured in the same "cylindrical frame type" and are implemented in a general horizontal pillow packaging machine. Further, for convenience of explanation of each bag making machine, the "front end or front end" refers to the upstream side in the feeding direction of the material, and the "rear end or terminal end" refers to the downstream side in the feeding direction.

First Embodiment The bag-making device according to the first embodiment shown in FIGS. 1 to 4 is suitably used when making the gassho-attached bag _F3 described above. The bag making machine includes a board 8 that is removably installed on the side of the frame machine, a front guide rod 10 that is connected to the front end of the board 8 perpendicular to the feeding direction, and feeds both upper sides of the board 8. A pair of lateral guide rods 14, 14 connected along the downstream side of the feed side and arranged symmetrically, and a pair of rear guide rods 16 connected above the rear end of the board 8 and arranged symmetrically. ,1
6, and each guide rod 10, 14, 16 is connected to each other in a frame shape. Each guide rod 10,1
4.16 are all made of circular pipe material (made of metal) with the same diameter and welded together.

The board 8 forms the main body plate of the bag-making machine and guides the lower circumference of the material to be folded into a cylindrical shape (including the articles filled in the same material), and is formed into a horizontally oblong rectangle in plan view. It is fixed with bolts, screws 6, etc. to the support base 4 on the bracket 2 disposed on the frame (not shown) side, and is used as a feeding bed (not shown) for materials (including articles). ) installed horizontally along the

The front guide rod 10 is for mainly bending the strip-shaped material F fed out from a roll-shaped material (not shown), that is, in the horizontal direction, and guiding it in the feeding direction. As shown in FIG. 2, a central base 10a and a pair of left and right guide portions 10b, 10b bent at a required guide angle are formed in series on both sides of the base 10a. By fixing the base portion 10a to the front end of the substrate 8, both guide portions 10b extend outside the substrate 8 in a wing shape. In addition, both guide portions 10b,
As shown in FIG. 3, the portions 10b are bent at a required guiding angle toward the downstream side of the feeding direction and downward, so that the portions 10b form a substantially figure-eight shape. Reference numeral 12 denotes a connecting rod for the front guide rod 10, and the supporting rod 12 includes:
It is connected to the front guide rod 10 and the base plate 8 so as to form a triangular planar shape (see FIG. 2). Note that the connecting rod 12 is formed of a circular pipe material.

The horizontal guide rods 14, 14 are mainly used to fold and guide the material into a cylindrical shape while forming a side edge for a seal.As shown in FIG. The portion 14a and the second guide portion 14b are serially bent at mutually different folding guide angles. The front end of the first guide part 14a is fixed to the connecting part between the base 10a of the front guide rod 10 and each guide part 10b, and the rear end of the second guide part 14b is fixed to each rear guide rod 16, which will be described later. It is fixed. This allows both lateral guide rods 14, 14
are arranged symmetrically to each other with respect to the material feeding center.

In each of the horizontal guide rods 14, 14, the first guide portion 14a and the base portion 10a of the front guide rod 10 form an approximately triangular inlet for materials and articles, and serve as primary forming guides for materials (raw materials). It is made by folding both sides inward to guide it into a cylinder.
As shown in the figure, it is formed at an angle that gradually slopes upward and becomes narrower along the downstream side of the feed. On the other hand, the second guide part 1
4b is for guiding the material that has been primarily formed in the first guide part 14a for secondary forming and further folding it into a cylindrical shape. They are formed at an angle that is tilted upward and further narrows, creating a V-shape shape that narrows toward the center of feeding. and each second guide part 1
The guide end portion 14c of 4b is connected to the horizontal guide rods 14, 14.
are located at the final and uppermost ends of the material and are opposed to each other at a required distance G suitable for aligning both side edges of the material on both sides of the feeding center (see FIG. 1).

The two rear guide rods 16, 16 are for guiding the cylindrical material while stably holding it in the desired shape and bag-making width, and as shown in FIG. A circular guide portion 16a for guiding and a gently upwardly inclined guide portion 16b for guiding the upper peripheral surface of the cylindrical material are formed in series, and the whole is formed into a substantially horizontal U-shape. The lower end of each circular guide portion 16a is
fixed to each side edge of the rear end of the substrate 8, and
The upper end of each diagonal guide portion 16b is fixed to the guide end portion 14c of the horizontal guide rod 14 on the corresponding side. Thereby, both rods 16, 16 are symmetrically connected to each other in a direction orthogonal to the feeding direction. Furthermore, both rods 16,
The left and right width of 16, that is, the circular guide portions 16a, 16
The bag making width W of the cylindrical material is regulated by the inner surface distance a (see FIG. 2).

That is, in the bag making machine of the first embodiment, the front, lateral, and rear guide rods 10, 14, and 16 constitute the material forming guide portion, as described above, so that each of these rods forms a material forming guide portion. The material can be folded and guided while maintaining a line-to-line contact state, allowing for good bag making.

Operation of the first embodiment Next, the operation of the bag making device according to the first embodiment will be explained. For example, as shown in Fig. 20a, a strip material F that is continuously fed according to the packaging speed is fed upward, and as it passes through the bag making section, it is bent toward the packaging line and gradually formed into a cylindrical shape. In contrast, in the bag making machine of the first embodiment, the front guide rod 10 on the entrance side first transfers the material F along the line.
In response, the base 10a and both guide portions 10b, 1
To guide the bending in the horizontal direction without difficulty while contacting the circumferential surface of 0b.

Next, the horizontal guide rods 14, 14 on both sides perform primary forming and narrowing of the material F on the inner surfaces of the first guide portions 14a, 14a, and both sides of the material F are gradually folded inward to form the material F into a cylinder. Next, the second guide part 14b,
14b performs secondary forming of the material F, and further folds and forms the material F into a cylindrical shape.
On the rear half side of b, 14b, side edges f, f serving as seals are formed in an upright shape and are opposed to each other at guide end portions 14c, 14c. and both rear guide rods 16,
Reference numeral 16 denotes an inner surface extending between the circular and oblique guide portions 16a and 16b, and inserts and guides the cylindrical member _F1 as if sandwiching it from the outside (see FIG. 4). As a result, Figure 20b
A stable cylindrical material _F2 having a shape as schematically shown in is formed, and thereafter, when it is transported with both side edges f, f being sandwiched by a sealing device (not shown) installed downstream of the feeding. The bag is welded and sealed to form a gassho-pasted bag _F3 shown in FIG. 17. The gassho-stick bag _F3 is made into a pillow-shaped sealed bag by being welded in the width direction by an end sealing device (not shown) at the end of the packaging line.

Hereinafter, a second embodiment, a third embodiment, and other forms of the bag making device will be described. However, in any of these cases, the different parts will be mainly explained in comparison with the bag making machine according to the first embodiment described above, and the same parts will be given the same reference numerals and the explanation thereof will be omitted. do.

Second Embodiment The bag making machine of the second embodiment shown in Figs. 5 to 8 is as follows:
This method is suitably carried out as a form of bag making of the lopsided folded sleeve bag F ₃ ' shown schematically in FIG. 18. The bag making machine includes a board 8 horizontally fixed to a support 4 of a bracket 2 on the frame side with bolts 6, and this board 8.
Front guide rod 1 connected to the front end perpendicular to the feeding direction
0, a pair of left and right lateral guide rods 14, 14 connected above the board 8 along the feeding downstream side, and a pair of left and right rear guide rods connected across the board 8 and each of the lateral guide rods 14, 14. It basically consists of 16 and 16. When compared with the bag making machine of the first embodiment, the bag making machine differs somewhat in the shape and length of the front, lateral, and rear guide rods 10, 14, 16, but these rods are shaped like a frame. They are the same in that they are connected and configured.

In the bag making machine of the second embodiment, the front guide rod 1
0 is the central base 10a as shown in FIG.
Guide portions 10b, 10b bent and extended on both sides extend to the side surface of the substrate 8 by the same length. Also,
The guide portions 10b, 10b are formed at the same angle on the side, and at different angles on the plane (the angle of the left guide portion 10b in FIG. 8 is smaller).

On the other hand, the right side of the horizontal guide rods 14, 14 is longer, and the first and second guide portions 14a, 14b
are formed at different angles, whereas the one on the left is shorter and formed at a constant angle (primary linear shape) over the entire length. As shown in FIGS. 6 and 7, the right lateral guide rod 14 extends upwardly along the downstream side of the feeding center, while the left lateral guide rod 14 It extends obliquely toward the feeding center above the left edge of the substrate 8, and both rods 14, 14 are disposed asymmetrically. As a result, the guide end portions 14c, 14c of the respective lateral guide rods 14, 14 are displaced relative to each other, and the right end portion 14c is positioned higher at the rear and extends to the left of the feeding center, whereas the left end portion 14c is positioned higher at the rear and extends to the left of the feeding center. The portion 14c is lower at the front and located above the left edge of the substrate 8.

Corresponding to the above-mentioned both lateral guide rods 14, 14, the left and right rear guide rods 16, 16 are formed into a lateral U-shape having different sizes, both having a circular guide portion 16a and an oblique guide portion 16b. It is connected between the side edge of the base plate 8 and the guide end portion 14c of the lateral guide rod 14. As shown in FIG. 8, although the rear guide rod 16 on the left side is of a small size, the bag making width W is regulated by the inner distance between the two circular guide portions 16a, 16a.

Operation of the second embodiment Next, the operation of the bag making device according to the second embodiment will be explained.

That is, the bag making machine of the second embodiment basically exhibits the same bag making action as the bag making machine of the first embodiment described above, and the guide rods 10 on both front sides and on both sides,
By folding and guiding the material effortlessly and smoothly on the circumferential surfaces of 14 and 16, it is possible to manufacture a cylindrical bag in which a side edge serving as a seal is formed facing each other on one side (left side in the feeding direction) of the cylindrical body ( (See Figure 8). In the bag making machine, the right lateral guide rod 14 uses the first and second guide parts 14a and 14b to guide the primary and secondary forming of the left edge of the material, whereas the left lateral guide rod 14 , which provides a necessary degree of forming guidance for the left side of the material over its entire length.

Third Embodiment The bag-making device of the third embodiment shown in FIGS. 9 to 12 is suitably implemented to form the envelope-stacked bag F ₃ ″ schematically shown in FIG. 19. This bag making machine, like the bag making machine of the first embodiment described above, has a board 8 which is horizontally fixed to the abutment 4 of the bracket 2 on the frame side with bolts 6, etc., and a feeder to the front end of this board 8. a front guide rod 10 connected orthogonally to the feeding direction;
A pair of left and right lateral guide rods 14, 14 connected above the board 8 along the feeding downstream side, and a pair of left and right rear guide rods 16, 16 connected across the board 10 and each lateral guide rod 14. Basically configured. When compared with the bag making machine of the first embodiment, the bag making machine differs in shape and length of the guide rods 14, 16 at the lateral rear.
6 connected in a frame shape is the same.

That is, in the bag making machine of the third embodiment, the front guide rod 10 has the following structure as shown in FIGS. 10 and 12.
Guide portions 10b are bent on both sides of the base portion 10a,
10b are both symmetrically formed with the same length and guide angle. In addition, the left and right horizontal guide rods 14,1
As shown in FIG. 11, the first and second guide portions 14a and 14b are bent at a required angle and are slanted approximately symmetrically so that they become narrower toward the feeding center, although their overall lengths are different. It is arranged like this. As shown in FIG. 10, the rear portions of the second guide portions 14b and 14b intersect with each other at a required interval above and below the feeding center.

Further, in both the lateral guide rods 14, 14, the first guide portions 14a, 14a are both formed to have the same length and angle, and the left second guide portion 14b is larger than the right second guide portion 14b. It is short and extends downstream at a low angle of inclination. As a result, both guide end portions 14c are displaced, and the right end portion 14c
is located high at the rear and to the left of the feeding center, whereas the left end portion 14c is low at the front and located to the right of the feeding center (see FIG. 12).

Both the left and right rear guide rods 16, 16 have circular guide portions 16a, 1 with respect to the above-mentioned both lateral guide rods 14, 14.
6a and the diagonal guide portions 16b, 16b are connected to form a horizontal U-shape of approximately the same size,
The side edge of the board 8 and the lateral guide rods 14, 1 on each side
4 and the guide end portions 14c, 14c. Note that although the left rear guide rod 16 is at a low position upstream of the feeding, both circular guide portions 16a, 1
The bag making width W is regulated by the inner circumferential interval 6a.

Effects of Third Embodiment Next, effects of the third embodiment will be explained. Also in the bag making machine of the third embodiment configured as described above, the front and rear guide rods 10, 14, 16 which constitute the forming guide portion for bending and folding the material are used.
However, each inner surface is in line contact with the material while being folded and guided for smooth bag making. To outline this bag-making operation with reference to FIGS. 21a and 21b, first, the front guide rod 10 bends and guides the strip material F in the horizontal direction where the packaging line is, and then the left and right lateral guide rods 14, 14 Each side of the material F is folded inward and squeezed to form a cylindrical shape. In this process, the left and right second guide portions 14b, 14b guide the seal-substitute side edges f'', f'' of the cylindrical material F1 _' ' on that side while overlapping them inside and out (up and down) above the feeding center. As a result, a cylindrical material as illustrated in Fig. 21b
F ₂ '' is molded, and thereafter the side edges f '' and f '' are sealed to produce the envelope-stacked bag F ₃ '' shown in FIG. 19.

Example of modification In the bag making machine that is the subject of this application, the above-mentioned first,
In either the second or third embodiment, the front guide rod 10, the connecting support rod 12, and the lateral guide rods 14 and rear guide rods 16 on each side are each formed by bending a single circular pipe material. It's okay. In addition to the above-mentioned bag-making machines in which the bag-making width W is constant, a variable-adjustable bag-making width type has also been proposed. For convenience, an example of a bag making machine for gassho pasted bags similar to the first embodiment will be summarized with reference to Figs. A pair of left and right boards 8, 8 are arranged symmetrically on both sides of the feeding center, and front, lateral, and rear guide rods 14, 16 on each side are arranged symmetrically and connected to each other in a frame shape. has been done.

That is, each board 8, 8 has a shaped side cross section and is formed to have the same width and length, and is placed horizontally along the feeding center on the shaft support 4 on the receiving plate, that is, the bracket 2 on the frame side. They are arranged on both sides of the receiving plate 20 installed in the. Both boards 8, 8 are inserted and supported by guide rods 22 fixed to the left and right sides of the rear part of the shaft support base 4, and are equipped with handles 26 passed horizontally to the left and right of the front part of the shaft support base 4. The left-hand threaded portion 24a and the right-hand threaded portion 24b of the adjusting screw 24
Each is supported by a screw. Corresponding to the boards 8, 8, the front guide rods 10, 10 are a pair of left and right,
In both cases, the base 10a is fixed to the front end of the board 8.
and a guide portion 10b having a required guide angle are connected and arranged symmetrically with each other via a connecting rod 12. Note that the horizontal guide rods 14 and rear guide rods 16 on each side are formed and arranged in the same manner as in the bag making machine of the first embodiment, and therefore their explanation will be omitted.

Therefore, in this bag making machine, by rotating the adjusting screw shaft 24 together with the handle 26 in the required direction, the front, lateral, and rear guide rods 10, 14, 16 can be rotated along with the boards 8, 8 on each side of the left and right sides. The guide rods 14 on each side
The molding width and the bag making width constituted by 16 can be varied, thereby making it possible to make bags of various widths for the gassho pasted tube bag _F3 shown in Fig. 17.

Furthermore, the "bag making width variable technology" presented in the above modification example
Of course, this can also be applied to the bag-making machines of the second and third embodiments, both of which have the base plate 8 and the front guide rod 10.
It can be configured by arranging a pair on both sides of the feeding center. Regarding all the bag making machines mentioned above,
Each guide rod 10, 14, 16 may be formed of a round bar material, or may be formed of a non-metallic material, preferably a synthetic resin material that does not generate static electricity and has good sliding properties. However, the rear guide rod 16 can also be formed from a plate material into a U-ring shape, and in this case, the surface that contacts the cylindrical material may be formed into a circularly curved surface (rounded surface).
Regarding the substrate 8, a plurality of guide rods may be arranged in parallel along the feeding direction in consideration of the target work (box-shaped or other single item). As mentioned above, the technique of configuring the part that folds and guides the material with a member having a circularly curved surface can of course be applied to a bag making device implemented in a vertical packaging machine. Furthermore, each of the bag making machines presented in this application can be used alone in a bag making line, that is, a line for forming a material from a band shape to a tube shape.

Effects of the Invention As described above, according to the bag-making device for flexible film-like materials according to the present invention, the bag-making device for forming a band-like material into a cylindrical bag is equipped with a front guide rod and a pair of left and right lateral guides. By using the rod, the contact area between the bag making device and the strip material can be reduced. Furthermore, since the part for folding and guiding the strip-shaped material has a circularly curved surface, bag-making resistance is significantly reduced, and the strip-shaped material can be smoothly guided and made into bags. In addition, the feeding speed of the strip material can be set at high speed, improving the packaging speed, and the bag making machine is constructed by connecting each guide rod in a frame shape, which reduces the weight of the bag making machine. It has potential advantages.

[Brief explanation of the drawing]

The drawings show each embodiment of the present invention, and FIG. 1 is a perspective view schematically showing the bag making device of the first embodiment, and FIG.
The figure is a plan view of the bag making machine shown in Fig. 1, and Fig. 3 is a plan view of the bag making machine shown in Fig. 1.
2 is a front view seen along the direction of the arrow in FIG. 2, that is, the feeding direction of the material, FIG. A perspective view schematically showing the bag making device of the embodiment, No. 6
The figure is a plan view of the bag making machine shown in FIG. 5, FIGS. 7 and 8 are front and side views seen from FIG. 6 and the arrow direction, and FIG. 9 is a third embodiment. FIG. 10 is a plan view of the bag making device shown in FIG. 9, and FIGS. 13 is a perspective view schematically showing a bag making device according to a modified example; FIG. 14 is a plan view of the bag making device shown in FIG. 13; FIGS. 15 and 16. The figures are a front view and a side view as seen from the directions of arrows XV and X in Fig. 14, Fig. 17, and Fig. 18.
19 are perspective views illustrating cylindrical bags of various shapes, FIG. 20 a, b, and FIG. 21 a, b.
These are explanatory diagrams schematically showing step-by-step the process of making cylindrical bags of various shapes. 10...Front guide rod, 14...Side guide rod, F...
Strip material.

Claims (1)

[Scope of Claims] 1. A bag making machine for making cylindrical bags while guiding the formation of a flexible film-like material fed along a bag making line, which is abbreviated as the bag making line. a front guide rod for guiding material bending, which extends symmetrically in orthogonal directions and bends the material toward the bag-making line and guides the material in the feeding direction; On both sides, a pair of left and right lateral guide rods are arranged so as to gradually approach each other or cross each other as the feed line progresses, and guide the material while folding it into a cylindrical shape. At least the part of the guide rod that folds and guides the material is formed of a bar-shaped material having a circularly curved surface, and at least the left front guide rod and the lateral guide rod and the right front guide rod and the lateral guide rod are connected in a frame-like manner. A bag-making machine made of a flexible film-like material, characterized by the following structure. 2. The front guide rod and the lateral guide rod on the left side and the front guide rod and the lateral guide rod on the right side are connected in a frame-like manner to each of two supporting members arranged oppositely so as to be able to approach and separate from each other, and the supporting members forming the pair are connected. 2. The flexible film according to claim 1, wherein the flexible film is configured such that the bag making width of the film-like material can be variably adjusted by moving the supporting members closer to and away from each other by operating the driving means. Bag-making machine for shaped materials.