JPS63162411A - Automatic bag making packaging machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to automatic (splicing) of original film in an automatic bag making and packaging machine as disclosed in, for example, Japanese Unexamined Patent Publication No. 60-217933. This invention relates to an improved automatic bag making and packaging machine that enables switching supply.

[Conventional technology]

After automatically and continuously forming a long flat film strip into a cylindrical film and filling the cylindrical film with the contents,
Typical automatic bag making and packaging machines that continuously manufacture individual packages by sealing them at predetermined intervals include A and D.
, PJ trade name; manufactured by Asahi Kasei Kogyo ■, automatic bag making and packaging machine, commercial product].

The specific packaging mechanism for this product is, for example, JP-A-60-2
The invention is disclosed in detail in Japanese Patent No. 17933, and the invention described in the above publication describes matters that should be considered in order to make the operation of this packaging mechanism more than twice as fast as the current speed, and describes an operating mechanism for that purpose. In particular, for packaging machines, what means can be used to transmit the rotational motion transmitted from the electric motor, which is used for vertical or horizontal reciprocating motion, to achieve ideal reciprocating motion? is disclosed.

On the other hand, Japanese Patent Application Laid-Open No. 60-99304 discloses that, in a similar type of packaging machine, the terminal end of the film material currently in use and the starting end of the film material to be newly supplied are attached (using an adhesive tape). This proposal aims to increase the operating rate of the packaging machine by making it possible to automatically change the raw material (presumed to be the same) and by extending the time that the packaging machine can operate continuously. There is a description. In fact, it can be said that increasing the speed of the packaging machine is difficult to achieve unless the exchange of JM cloth is automated and operation can be continued. This is because the roll length of the original film is already at the limit for handling, and a significant increase in roll volume cannot be expected.
If the speed is doubled, the cycle for changing the film will be half the time compared to the conventional method.
(Replacement time x number of replacements) Due to downtime, which is proportional to the number of replacements, the amount of product that goes unproduced has a greater impact as the speed increases. This is because it is no longer possible to increase the speed of machines by ignoring this part.

Therefore, the inventors of the present invention have also researched the form of film seams and how to make film seams in order to automatically change the original film.
The application was filed as No. 1-198588. These methods are
It relates to the joining of films by heat welding, and is characterized by the fact that the excess film beyond the seam on the side of the new film to be supplied can be used to remove the weld line.
As a result, the seam will not be caught in a part of the packaging machine folder and cause abnormal resistance (tension), and at the same time, it will be a strong seam that will not come off during travel. It was believed that by using this, the automatic exchange of raw material in packaging machines would be completed, and that the speed of packaging machines would steadily increase accordingly.

[Problem that the invention seeks to solve]

However, in reality, problems such as interruption of operation due to broken seams and broken bags, and an increase in the incidence of broken bags (banks) during boiling have occurred, and problems have arisen that cannot easily be put to practical use. These two defective phenomena, that is, the interruption of operation due to broken seams and broken bags, may be caused by the film that has been spread inside the packaging machine system progressing out of the system and coming off, causing the contents to scatter and adhere to various places. However, the frequent occurrence of punctures during boiling not only results in a complete loss of raw materials and labor, but also reduces the quality of the final product. This phenomenon means that food safety cannot be guaranteed, and both of these phenomena can be said to be major obstacles to achieving higher speeds of packaging machines. It was also found that this phenomenon is controlled by another factor that is not directly related to the type of seam.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, the present invention has been made in the known automatic bag-forming and packaging machines that are commercially available or disclosed in patent publications. This can be summarized as follows: (1) A splicing device, a film storage device, and a film running position adjusting device are arranged in this order between the folder that controls the bending of this strip-shaped film into a cylindrical shape.

The content of the present invention will be explained in detail below using drawings and the like.

FIG. 1 is a schematic diagram showing an example of an automatic bag-forming and packaging machine according to the present invention along with its processes, and is shown so that the roles and required functions of each process device can be understood.

First, the right half of FIG. 1 is a part illustrating the role functions of a conventionally known automatic bag making and packaging machine, which is also adopted as is in the present invention.
．． It is led to folder 14 via 13' and 13'. In this folder 14, the strip film F% is bent from approximately the center of the width of the strip, and
guided into the Folgou 14 so as to cover the outside of the feeder pipe 15 for supplying the contents therein with a strip of film;
The film F1' is bent into a cylindrical shape in which both side edges are overlapped. Then, when passing between the next fusion sealing devices 16 and 16', the overlapped film portions are fusion sealed to become cylindrical films F and JF. and,
Feeder pipe 15 inside the cylindrical film F1#
The content 17 guided by a supply pump 15' or the like is supplied from above, and wire ligatures 19, 19' are applied to the portions to be ligated, which are squeezed at predetermined spacing by squeezing rolls 18, 18'. Then, the packages are automatically completed one after the other.

Moving to the left half of FIG. 1, the device newly attached to the above-mentioned continuous automatic bag-forming and packaging machine, that is, the main part of the present invention, is a device that is newly attached to the above-mentioned continuous automatic bag-forming and packaging machine. A film supply device F mainly consists of a reel mount 12 that supplies a strip-shaped film (hereinafter sometimes simply referred to as film) F□′ or F, I of the required length from F (sometimes referred to as raw fabric), F2. and the folder 14, which continuously bends the center of the film strip so that both side edges of the film strip overlap to form a cylindrical film, and the final end of the film F□ currently in use and the material to be newly supplied. It consists of a splicing device rPia that controls the joining with the starting end of the anti-F2, and a group of multiple rolls that can expand and contract the distance between the rolls, and the length of the distance between the rolls is necessary and sufficient to meet the time required for the above joining. A film storage device H, which controls the storage of film strips, and a running position adjustment device B, which controls the detection of a shift in the running position of the running film strip and corrects the position, are respectively F, G, H, B, 14. It is to arrange them so that they are lined up in this order.

To explain the necessity in more detail from the required functional aspect, in the film supply device F, the film F process of the original fabric F1 currently in use is already about to reach its final part, and the film feeder In preparation for splicing the strip film F2' to be fed out next, the film F2 is attached to its starting end F2'.
is pulled out in advance to the top of the splicing device G, and its tip is locked between the fixing plates 6 and 6'. FIG. 1 shows such a situation.

Then, at the next moment, the final end of the film on the original film F1 becomes free, the sensing roll 7 is activated, and the two pairs of pinch rolls 8, 8' and 9, 9' release the film that has been running. Pinch to secure. The timing is when the terminal end of the film F□' does not pass through the pinch rolls 8, 8', but comes closest to them. And by being fixed like that, the overlapping films F/, Ft,
The overlapping parts of / are joined by a joining device G.

The splicing device [G generally consists of suppression plates 1 and 2, which control splicing or joining by compression between them. When it is.

It means a simple suppression plate, a pair of heating plates when fusion is performed using a hot plate, and a pair of electrode plates for applying high frequency when fusion is performed using high-frequency heating. All of these should be pressed for sufficient time to prevent them from coming off at the seams.

Next, during the suppression, the strip-shaped films F1' and F2' are fixed by the pinch rolls 8, 8' and 9, 9', so that there is no supply from the original side. On the other hand, the packaging machine continues to consume films F and I because it is in operation.

The film storage device H has the role of covering the film consumption, in other words, the role of creating a sufficient pressing time for the above-mentioned bonding.
A fixed roll group consisting of 10″, 10″, 10″ and dancer rolls 11.11′, 11′, 11
It consists of a combination of multiple role groups as shown in
Usually, film lengths are stored that correspond to the dimensions and distance between the fixed roll group and the dancer roll group suspended under a constant load. As mentioned above, when the film edge is fixed and the film supply stops,
The dancer roll group is lifted in response to the excess tension applied to the film, shortening the distance between the rolls, and releasing the stored film in an amount corresponding to the film length to be consumed thereafter, while maintaining a constant tension. Therefore, by choosing a time slot that is appropriate for the length of the stocked film, the time required for film splicing (for replacing the original film) can be saved without reducing the capacity of the packaging machine.

The setting of this storage length is based on the relationship between the time from when film supply stops until film splicing is completed and film supply is restarted, and the required film length consumed by the packaging machine during that time. However, it is desirable to set it with a margin of 30 to 50%. The specific measures to increase this stockpiling length are limited by the ease with which the film can be passed through.

Rather than increasing the distance between rolls, a measure to increase the number of rolls in a roll group will be adopted.

The installation of the traveling position adjustment device B, which will be described next, is particularly important. In other words, only after this device was installed could the above-described film storage device H and splicing device G be meaningfully installed and their functions effectively utilized.

First, as shown in FIG. 1, for example, the running position adjusting device B is composed of a detector 20, an amplifier 21, and an adjusting device 22. This detector 20 has a function of detecting the amount of deviation of the running position of the running film from a predetermined position, and is generally a load cell style detector that detects by the amount of strain. Light-emitting diode type detectors that detect differences in light intensity, phototube type detectors, etc. can be used.

Then, the amount of deviation is sent as an electric signal, which is converted into an electrical quantity by an amplifier 21 and amplified.Then, the electric motor of the adjustment device 22 provided upstream of the detector 20 is actuated to move the running film by the signal amount corresponding to the amount of deviation. Make a correction by shifting the running position in the opposite direction. This position correction changes the parallelism and levelness of the roll. This is accomplished by an electric motor twisting the entire roll.

[Effect]

The device of the present invention prevents interruptions in operation due to broken seams and broken bags.
Also, the raw fabric can be automatically replaced without causing defects such as an increase in the incidence of punctures during boiling.

The reason why the present invention has such effects is as follows. The phenomenon of seam breakage is said to be due to the difficulty in selecting the type of acid and completing it because in the past there was not enough time for seam-formed acid.

It is also presumed that the increased failure rate of bag breakage and puncture rates is due to lack of attention to countermeasures against meandering that occurs in running films. Particularly regarding the latter, the apparatus of the present invention uses a larger number of rolls from the original fabric to the folder 14 than the conventional apparatus. Care is taken to maintain accuracy during finishing and installation of these rolls, but since there are many rolls, there are many factors that can introduce unevenness in the process, and in this case, the size of the tension ring that is applied instantly is important. is unavoidable. On the other hand, the accuracy of the thickness and characteristic rings of the film brought in from the original side remains the same as before. If the running position adjustment device B is not installed, it is inevitable that the film will meander during film running, especially at high speeds, and this will cause the film to move directly to the folder 14.
However, due to the meandering of the film, there is an increased possibility that the fusion seal line applied to the overlapping portion of both side edges of the strip film will cross the edge of the overlap margin or the edge thereof. It is presumed that this part causes bag breakage and punctures during boiling.

In the present invention, the installation of the traveling position adjustment device B greatly contributes to smooth automatic switching and supply of raw fabric.

From the viewpoint of preventing film meandering, the splicing device G of the present invention is preferable as disclosed in Japanese Patent Application No. 198587/1982 and Japanese Patent Application No. 198588/1982.
This device uses fusion bonding that allows the leading end of the spliced film in the direction of film travel to be removed from the seam seal, thereby reducing tension fluctuations during travel.On the other hand, travel position adjustment device B has Accurate device for correcting 1 position deviation.

For example, it is desirable to adopt a system that detects deviations in the position of the side edges of a running film by the difference in light amount (current) of light emitting diodes, and amplifies it with a transistor to adjust the position.

〔Example〕

A rocket-shaped package with a diameter of 20cm and a length of about 2001m (fish sausage ) was continuously produced at a capacity of 200 pieces per 71 minutes.

The packaging equipment used was the one shown in Figure 1 (embodiment of the present invention);
There were three machines, one for the comparative example shown in FIG. 2 and one for the reference example shown in FIG. Note that each number and symbol in FIGS. 2 and 3 has the same meaning as in FIG. 1. Each of these devices will be explained. First, the common point is that the packaging apparatus itself located on the right side of each round is a high-speed type packaging machine as disclosed in, for example, Japanese Patent Application Laid-Open No. 60-217933. Therefore, the data shown in FIG. 3 (reference example) indicates the technical level of this type of packaging machine.

Next, the difference is that the one in Fig. 2 (comparative example) has a splicing device G compared to the one in Fig. 3 (reference example), and accordingly has a film storage device [H]. There is.

The device shown in FIG. 1 (present invention) is different from the device shown in FIG. 2 (comparative example) in that it is further provided with a traveling position adjustment device B.

The following table summarizes the experimental results for the three machines mentioned above.

As shown by the above results, it can be seen that the apparatus of the present invention (FIG. 1) is necessary to achieve automatic switching of raw materials without causing defects.

〔Effect of the invention〕

By having the above-mentioned structure, the present invention enables stable automatic switching of the film material of an automatic bag-forming and packaging machine.

This is due to staffing problems due to the inability to completely automatically change over the raw material for high-speed packaging machines, which apparently have increased capacity. The device of the present invention makes it possible for the first time in a practical sense to increase the speed of the packaging machine, since it eliminates the entire problem of increased number of defective (banked) products.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of an automatic bag-forming and packaging machine according to the present invention along with its steps, and FIGS. 2 and 3 are schematic diagrams of packaging machines used in a comparative example and a reference example, respectively. 14... Folder B... Traveling position adjustment device F°° Film supply device G... Splicing device H... Film storage device

Claims (1)

[Claims] 1. In an automatic bag-forming and packaging machine that automatically and continuously forms a long flat film strip into a cylindrical film, fills the cylindrical film with contents, and then seals it to obtain individual packages. Between a film supply device that is in charge of feeding a strip film of a required length from a film roll in a rolled layer state and a folder that is in charge of folding the strip film into a tube shape so that both side edges of the strip film are overlapped. , consists of a splicing device that controls the joining of the final end of the current fabric and the starting edge of the new fabric to be supplied, and a group of multiple rolls that can expand and contract the distance between the rolls. There is also a film stocking device that stores the necessary and sufficient length of film strips to meet the time required for the above-mentioned bonding, and a running position adjustment that detects any deviation in the running position of the running film strips and corrects the position. An automatic bag making and packaging machine characterized in that the devices are arranged in order.