JP2000344207A - Automatic packaging method and apparatus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily perform tray packaging without preparing a film in advance. SOLUTION: A film extruding mechanism 13 for extruding a film 15 by melting a resin material as a film raw material and extruding it from a resin extruding port 14 is arranged near a tray 2 in which an article to be packaged is stored. While the film extruding mechanism 13 is producing the film 15, the object to be packaged is packaged with the film 15 immediately after the production.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic packaging method and an apparatus for packaging an object to be packaged with a film made of a resin material.

[0002]

2. Description of the Related Art Conventionally, the processing of trays with lids, which are often used in plastic molding and packaging machines at a side dish counter such as a supermarket, has the same shape and is suitable for mass production. Generally, a tray or a lid member is formed by heating and drawing a plastic blank material (sheet shape) as a raw material into a predetermined shape. The tray and lid are molded simultaneously or separately according to the separation type or non-separation type.

[0003] A stretch wrapping machine for wrapping using a stretch film is disclosed in Japanese Patent Application Laid-Open Nos. 8-217008 and 9-12004, and is transported from a product supply unit. This is an apparatus that automatically selects a film having several types of widths set in advance according to the size of a coming tray, and wraps an article to be packaged with the film sent from the film supply unit.

[0004]

However, in the case of the plastic molding and packaging machine as described above, a dedicated mold is required for molding lid members of various sizes, and the replacement work and stocking are required. Management and maintenance were also needed.

[0005] In the automatic stretcher wrapping machine, when a variety of tray sizes are used, a roll film having several widths is always set in the machine in advance.
In order to automatically select and use the roll film according to the tray size, a large number of roll films must be stocked.

Further, since a film having a certain thickness is stretched in accordance with the tray size, the thickness becomes uneven or a very thin portion is generated. In addition, there has been an inconvenience that, for example, when trying to package a barb or a food having a protrusion at the tip, a hole is formed from the portion. Furthermore, when the amount of the stitch is increased according to the size of the packaged object, the film is released from the clamp because the force for clamping the film is insufficient.
In some cases, packaging was not possible.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and eliminate the need for a drawing mold or the like.
An automatic packaging method in which the amount of the film member used is a necessary minimum, the thickness of the film member can be changed depending on the application, and the packaging can be performed without the need for stocking several kinds of roll films. And an apparatus therefor.

[0008]

According to the first aspect of the present invention, there is provided an automatic packaging method wherein a resin material as a film material is melted and extruded from a resin extrusion port, and the extruded resin material is cooled to form a film. Then, the film immediately after generation is guided to the position of the package stored in the tray, and the package is packed with the film immediately after generation. Therefore, it is not necessary to prepare various roll films for wrapping, and it is possible to generate and wrap a necessary film as needed, since the packaging object is wrapped while generating the film. .

According to a second aspect of the present invention, there is provided an automatic packaging method, wherein a film is extruded by extruding a resin material as a film raw material from a resin extrusion port in a molten state in the vicinity of a tray accommodating an article to be packaged. A film extruding mechanism is provided, and while the film is extruded by the film extruding mechanism, the object to be packaged is packaged with the film immediately after the production. Therefore, it is not necessary to prepare various roll films for wrapping, and it is possible to generate and wrap a necessary film as needed, since the packaging object is wrapped while generating the film. .

According to a third aspect of the present invention, in the automatic packaging method according to the first or second aspect, the thickness of the film formed by varying the size of the gap between the resin extrusion ports is varied. . Therefore, it is possible to easily produce a film having the required strength according to the contents to be packaged.

According to a fourth aspect of the present invention, in the automatic packaging method according to the first, second or third aspect, the width of the film formed by varying the size of the resin extrusion opening in the width direction is varied. It is characterized by. Therefore, it is possible to easily generate a film according to the size of the article to be packaged.

According to a fifth aspect of the present invention, in the automatic packaging method according to the first or second aspect, the resin material extruded from the resin extruding port is attached to the surface of a rotating cooling drum for cooling. And Therefore, the resin material extruded from the resin extrusion port adheres to the surface of the cooling drum to be cooled and solidified, and is guided by the rotation of the cooling drum in the direction of the articles stored in the tray.

According to a sixth aspect of the present invention, in the automatic packaging method according to the fifth aspect, the rotation speed of the cooling drum is varied according to the thickness of the film to be formed. This makes it possible to reliably cool and solidify the resin material extruded from the resin extrusion port to form a film.

According to a seventh aspect of the present invention, there is provided an automatic packaging apparatus comprising: a film extruding mechanism for extruding a film by extruding a resin material as a film raw material from a resin extruding port in a molten state; and rotating the extruded film. A film forming mechanism that solidifies the film by adhering it to the surface of the cooling drum and cooling it, and a packaging mechanism that guides the film immediately after generation to the position of the object to be packaged and wraps the object with the film. It is characterized by having. Therefore,
A film necessary for packaging an object to be packaged can be generated, solidified and immediately packaged, and film generation and packaging can be easily performed by the same device.

According to an eighth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the resin extrusion port is capable of changing the extrusion size. Therefore, it is possible to easily generate a film according to the size of the article to be packaged.

According to a ninth aspect of the present invention, there is provided the automatic packaging apparatus according to the seventh aspect, wherein a partition plate is provided over the entire width of the resin extrusion port, and the partition plate is moved up and down to fix the position of the film. The thickness of the film can be controlled by adjusting the flow rate of the raw material. Therefore, it is possible to easily produce a film having the required strength according to the contents to be packaged.

According to a tenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a partition bar slid in the width direction is provided at the resin extrusion port, and the partition bar is slid to fix the position. The width dimension of the film to be formed can be controlled. Therefore, it is possible to easily generate a film according to the size of the article to be packaged.

According to an eleventh aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the resin extruding port is located at a position equal to or above the center of the cooling drum so as to have a certain gap with the cooling drum. Are arranged upward. Therefore, the film immediately after extrusion can be immediately captured and adhered to the surface of the cooling drum, and a smooth film having a constant thickness can be formed.

According to a twelfth aspect of the present invention, in the automatic packaging apparatus of the seventh aspect, the cooling drum has a thin hollow structure, and the support shafts on both sides of the cooling drum have a hollow structure so that a fluid can pass through the inside thereof. A rotary joint and piping are connected to these support shafts to allow cooling water or cooling air to pass therethrough. Therefore, it is possible to obtain a cooling drum capable of effectively cooling and solidifying a film immediately after formation at high temperature and soft.

According to a thirteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the surface of the cooling drum is processed with a fluorine resin. Therefore, the film can be easily peeled off from the cooling drum, and packaging with a thin film can be easily performed.

According to a fourteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the rotation speed of the cooling drum can be variably controlled. Therefore, the film formation speed can be easily changed. Further, the resin material extruded from the resin extrusion port can be reliably cooled and solidified to form a film.

According to a fifteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a film extrusion mechanism having a resin extrusion port and a film generation mechanism having a cooling drum are integrally attached to a support frame. An elevating mechanism for raising and lowering the support frame in the upper surface direction of the packaged object is provided. Therefore, it is possible to easily perform packaging for the article to be packaged.

According to a sixteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a scraper having a sharp end pointed upward with a small gap or contact with the cooling drum is provided on the peeling side of the film. It is characterized by. Therefore, the film can be easily separated from the cooling drum.

According to a seventeenth aspect of the present invention, in the automatic packaging apparatus according to the sixteenth aspect, the entire scraper is minutely vibrated. Therefore, the film can be easily separated from the cooling drum.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [One Embodiment] One embodiment of the present invention will be described with reference to the drawings. First, although a detailed mechanism will be described later, FIG. 1 shows a basic configuration of the present embodiment. First, the packaging machine main body 1 constituting the automatic packaging apparatus 201 integrally includes a film unit 205 for generating the film 15 and a packaging unit 202 for sealing the upper surface of the tray 2 with the film 15 generated by the film unit 205. To have. That is,
The packaging machine main body 1 includes a tray holding base 3 for holding a tray 2 in which items to be packed are stored, and a film generating unit 4 is provided above the tray holding base 3. The film generation unit 4 includes a linear actuator 5 for moving the film unit 205 up and down in accordance with the height of the tray 2 set on the tray holding table 3 and a linear actuator provided along the seal surface 6 of the tray 2. An actuator 7 and a linear guide rail 8 for guiding the linear actuator 7 are provided. The arrangement of each part and the linear actuator 5 and the linear actuator 7 are combined with the packaging mechanism 51 for the tray 2.
It acts as. In particular, the linear actuator 5 includes a lifting mechanism 5 of the film forming unit 4.
2 also acts. Note that the linear actuator 5 and the linear actuator 7 are shown as an actuator Act in the block diagram of FIG.

Next, the film forming unit 4 and the extruding unit 101 for supplying the heated and melted pellets to the film forming unit 4 will be described with reference to FIGS. These film generation unit 4 and extrusion unit 101 constitute a film extrusion mechanism. First, as a film raw material, for example, a pellet made of an ethylene-vinyl acetate copolymer is used.
The mixture is heated to a temperature of 0 to 200 ° C. to be melted and supplied to the resin extruding section 9 by a pressurizing means. The extruding unit 101 performs such an operation. That is, the extrusion unit 101
A mandrel 103 is provided inside a housing 102, and a pellet made of a resin material heated and melted by rotation of the mandrel 103 is supplied to a resin extruding section 9 provided in a film forming unit 4. Housing 1
02 is provided with a hopper 104 for charging the pellets into the transfer space of the pellets by the mandrel 103, and heats the solid pellets or the pellets previously melted from the hopper 104 to maintain the molten state. The heater 105 is built in. Therefore, the extrusion unit 101 drives the mandrel 103 to rotate by the motor M shown in FIG. 19, and sends the pellet forward while stirring the pellet by the action of the screw portion 106 formed on the surface of the rotated mandrel 103. However, as another embodiment, it is needless to say that a pressurizing unit having another structure, for example, a pressurizing pump or the like may be used as a pressurizing unit that supplies the pellets to the resin extruding unit 9 of the extruding unit 101. .

Next, the resin supply tube 10 constituting the resin extruding section 9 provided in the film forming unit 4 is
It has a structure in which the outer periphery of a flexible pipe 11 formed of a SUS material or the like is covered with a heat insulating material 12. A nozzle 14 is provided as a resin extrusion port for forming the film extrusion mechanism 13. A mechanism for controlling the thickness and width of the film 15 provided at the position of the nozzle 14 (the details thereof will be described later). The molten resin is extruded to the cooling drum 16 after setting to a desired value. Specifically, the thickness is set to 30 μm to 100 μm or the like so as to have a desired value suitable for the packaging form of the article to be packaged. At this time, the surface of the cooling drum 16 is cooled by cooling means such as water cooling at about 20 ° C. The cooling drum 16 includes a drum 17 having a hollow portion. This drum 17
For example, it is formed by machining SUS630. As shown in FIG. 4, a support shaft 18 for supporting the rotation of the drum 17 is provided at both ends thereof.
Each of these support shafts 18 has a hollow structure, and is attached to a support frame 19 via a bearing 20.
Then, supply and discharge of the cooling water 23 (see FIG. 1) can be performed via the rotary joint 21 and the pipe 22. Next, in the film generation mechanism 24, the molten resin extruded from the nozzle 14 is cooled by adhering to the surface of the cooling drum 16 to form the film 15. When the leading end of the film 15 reaches the position of the scraper 25 as shown in FIG. 2 by the rotation of the cooling drum 16, the leading end of the scraper 25 comes into contact with the film 1 to form a thin film.
5 is peeled off. Then, the rotation of the cooling drum 16 and the movement of the film 15 in the sealing direction by the linear actuator 7 are synchronized with each other, and the sealing surface 6 on which the adhesive is applied is synchronized.
Then, the film 15 is sealed. In this case, the film 15 is controlled so that the supply of the resin is stopped by the partition bar 36 provided in the nozzle 14 so that the film 15 has a predetermined length that matches the dimension of the tray 2 in the width direction. .
Here, the cooling drum 16 is rotationally driven via a transmission gear 27 by a motor 26 attached to the support frame 19. This motor 26 is shown as a motor M in FIG.

The support frame 19 has such a structure that the linear actuator 5 and the linear actuator 7 can control the vertical movement and the movement of the film 15 in the sealing direction.
Even if the height changes.

Next, a method of cooling the cooling drum 16 will be specifically described with reference to FIG. First, cooling water 23 (or cooling air) is supplied from the end of the support shaft 18 of the cooling drum 16 through the rotary joint 21 and the pipe 22 to cool the surface of the cooling drum 16. Also,
The adjustment to the predetermined temperature is performed by monitoring with a non-contact type temperature sensor or the like (not shown) and changing the flow rate of the cooling water 23 (or cooling air). Then, the warmed cooling water 23 (or cooling air) is discharged from the end of the support shaft 18 on the opposite side.

Further, the nozzle 14 of the resin extrusion unit 9 is turned upward, a certain gap is provided between the nozzle 14 and the cooling drum 16, and the nozzle 14 is attached with a predetermined inclination. 14 to the cooling drum 16
Are arranged so as to be equal to or above the center.

Here, as described above, the entire surface of the cooling drum 16 which comes into contact with the film 15 is coated with a fluorine resin. In addition, the tip having an acute angle is directed upward and contacts the peeled side of the film 15 with a predetermined inclination, or
The scraper 25 is attached with a certain gap provided to improve the peelability of the film 15 from the cooling drum 16. As the material of the scraper 25,
It is considered that a fluororesin or the like having good releasability of the film 15 is optimal, but there is also a method of using a metal material and performing a surface treatment such as coating of the fluororesin on the surface.

Further, by applying a minute vibration to the scraper 25, the releasability can be further improved. The means for supporting the scraper 25 and applying the micro-vibration is, for example, as shown in FIG. 5, by fixing the fixture 107 to a pair of support frames 19 for supporting the support shafts 18 connected to both ends of the drum 17, These pair of fixtures 1
07, a scraper holder 109 that fits and supports both ends of the scraper 25 via a leaf spring 108 is fixed, and a piezoelectric element 110 is attached to the leaf spring 108. As the piezoelectric element 110, for example, polyvinylidene fluoride (PVDF) or the like is used. The length of the scraper 25 is set so that the leaf spring 108 and the leaf spring 108 mutually apply a pressure when the leaf spring 108 is at rest. Therefore, when a voltage is applied to the piezoelectric element 110, a distortion is generated in the piezoelectric element 110, and one leaf spring 108 is bent in the direction of the other leaf spring 108. Therefore, by periodically changing the voltage applied to the piezoelectric element 110, the scraper 25 can be vibrated in the longitudinal direction.

In this embodiment, the piezoelectric element 110 is selected as a drive source for applying a minute vibration to the scraper 25, but the present invention is not limited to this.
For example, an electrostrictive element may be used.

Here, since the molten resin extruded from the nozzle 14 is blown to the cooling drum 16 with a predetermined width and thickness and is generated while cooling, the film 15 is separated from the cooling drum 16. Sometimes, it is required to have hardness enough to be independent. At that time, film 1
Since the cooling time varies depending on the width and thickness of the film 5, the rotation speed of the cooling drum 16 is controlled to control the film 1.
The contact time between the cooling drum 5 and the cooling drum 16, that is, the cooling time is adjusted.

Next, a partition plate driving mechanism for changing the film thickness of the film 15 will be described with reference to FIGS. First, a partition plate 29 having a width equal to or greater than the maximum width of the nozzle 14 is provided at the tip of the nozzle 14. Then, a force is applied in such a direction that both ends are always closed by a tension spring 30 so as to be able to move up and down in the thickness direction of the film 15. Further, an elongated hole 31 is formed in the vicinity of the center of the partition plate 29 in the horizontal direction, and an eccentric cam 33 attached to the shaft end of the motor 32 is fitted into the elongated hole 31 to form a mounting Scotch-Yoke mechanism. Thus, the opening degree of the nozzle 14 can be adjusted by moving the partition plate 29 up and down. Therefore, the thickness of the film 15 can be controlled by controlling the extrusion amount of the molten resin by the gap formed between the tip of the partition plate 29 and the inner wall of the nozzle 14.

Next, a mechanism for changing the width of the film 15 according to the size or type of the tray 2 will be described. This mechanism, as shown in FIGS. 7 and 8,
Linear actuators 34 are provided on both sides of the support frame 19, and a pair of linear actuators 34 connects a linear actuator shaft 35 and a partition bar 36 moving inside the distal end side of the resin extrusion unit 9 by a connection plate 37. Things. That is, as shown in FIG. 7, the pair of partitioning rods 36 completely block the nozzle 14 located at the distal end of the resin extruding section 9, so that the nozzles that extrude the film 15 at intervals between the distal ends of the partitioning rods 36. Fourteen widths are defined. That is, the extrusion of the molten resin is allowed only from a position corresponding to a position between the distal end portions of the partition bar 36. As shown in FIG. 8, the linear actuator 34 for driving the partition bar 36 is connected to the actuator case 11 fixed to the film forming unit 4.
1, a linear actuator shaft 35 having an outer peripheral surface threaded and a guide shaft 112 having a smooth outer peripheral surface are slidably provided. The linear actuator shaft 35 and the guide shaft 112 are parallel to the partition rod 36. It is formed to be fixed to the connecting plate 37. Then, the actuator case 1
A rotary nut (not shown) rotatably driven by a motor M shown in FIG. 19 is rotatably provided in 11, and this rotary nut is engaged with a linear actuator shaft 35. As a result, when the rotary nut is rotated by the motor M, the linear actuator shaft 35 moves rightward or leftward according to the rotation direction. Then, the left and right partition rods 36 connected by the connecting plate 37 together with the linear actuator shaft 35 move inward or outward synchronously, and the interval between the opposing tips of the partition rods 36 causes the nozzle 14 that pushes the film 15 out. Can be changed. Thus, the film 15 corresponding to the size of the tray 2 to be sealed can be formed.

Although the thickness of the film 15 is determined by defining the width of the nozzle 14 of the molten resin as described above, the thickness of the film 15 may be slightly increased by changing the rotation speed of the cooling drum 16. It goes without saying that control can be performed.

Here, the process of film formation will be described.

The process for producing a film used in the present invention is not essentially different from a technique called extrusion molding. However, it is general that the amount of molten resin extruded at one time is extremely small and intermittent. This is a major difference from extrusion molding. This feature allows the device to be miniaturized and thus can be incorporated as part of the automatic packaging device 201.

As described above, in the extrusion unit 101, the mandrel 103 is rotationally driven by the motor M shown in FIG. 19, and the pellet is moved forward while stirring the pellet by the action of the screw portion 106 formed on the surface of the rotated mandrel 103. Send out. As a result, the pellets that have become the molten resin are filled up to the nozzle 14 provided in the film generation unit 4, and the preparation for film generation is completed in this state. Therefore,
After the film is ready for production, the mandrel 103
Is rotated back and forth so as to keep the tip position of the molten resin inside the nozzle 14 substantially constant. This state is a standby state. Therefore, in the standby state, the film generation unit 4 receives a signal from the automatic packaging apparatus 201 and starts film generation. The process by which such an operation is performed will be described later in detail, but the operation will be described here. First, the cooling drum 16 is driven to rotate, and at the same time, the mandrel 103 rotates to extrude the molten resin from the nozzle 14. Thereby, the molten resin is extruded from the tip of the nozzle 14, and the molten resin is cooled by coming into contact with the surface of the cooling drum 16, and is thereby solidified to form the film 15, which is sent to the left side in FIG. The solidified film 15 is used as a scraper 2
The film 5 is peeled off from the surface of the cooling drum 16 and can be handled as a film 15. At this time, the rotation of the mandrel 103 is controlled by the film forming apparatus controller 3 shown in FIG.
01, and when it is determined that the molten resin has been extruded from the nozzle 14 by an amount that generates a film 15 of a predetermined length, the mandrel 103 is once quickly reversely rotated. As a result, the supply of the molten resin to the nozzle 14 is suddenly interrupted, and the rear end portion of the film 15 is cut off. At this time, since the nozzle 14 is arranged upward as shown in FIG. 3, the molten resin is drawn substantially uniformly from the nozzle 14, thereby improving the linearity of the rear end of the film 15. A similar effect is achieved with nozzle 1
This is also exerted at the start of the extrusion of the molten resin from Step 4, whereby the linearity of the leading end of the film 15 is also improved.

Further, in the above-described embodiment, the state where ethylene vinyl acetate is used as the resin material has been described, but a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon 6 (trade name) or the like may be used. It can be implemented similarly.

Next, an overall flow for packing foods such as fish, meat, and prepared dishes on the tray 2 will be described.

(1) First, resin raw materials are stored in a state where they are heated and melted at a predetermined temperature in advance.

(2) The tray 2 on which the items to be packaged are placed is set at the reference position of the tray holder 3. At this time, although the appearance is not shown, the size of the tray 2 is measured by an optical sensor or a sensor S (see FIG.
Basic data for determining the width and thickness of

(3) The resin material that has been melted under pressure is extruded by a rotational drive of the mandrel 103 by a motor M, a pressure pump, or the like, and is waiting at the resin extrusion unit 9.

(4) The film unit 205 is moved to the packaging start position (near the reference setting position of the tray 2). Since this position is the origin position, it is desirable to wait at this position when one cycle of packaging is completed. Then, the entire film unit 205 is moved up and down by driving the linear actuator 5,
Place at a predetermined height.

(5) The necessary width of the film 15 is determined by inserting and removing the left and right partition bars 36 of the nozzle 14 based on the measurement data of the size of the tray 2. This partition bar 36 is operated by a linear actuator 34 via a connecting plate 37. The left and right partition bars 36 move a predetermined amount inward or outward relative to each other. Therefore, the width dimension of the film 15 is determined on the basis of the center.

(6) The cooling drum 16 is driven to rotate by a motor 26 via a transmission gear 27, and furthermore, a partition plate 29 provided on the nozzle 14 is driven by an eccentric cam 33 to adjust the thickness of the film 15. I do.

(7) Since the inside of the cooling drum 16 has a hollow structure and the cooling water 23 is supplied through the pipe 22 and the rotary joint 21, the extruded molten resin adheres to the surface of the cooling drum 16. By doing so, the molten resin is rapidly cooled, and the film 15 has a hardness enough to be self-supporting, and is sent out in the packaging seal direction of the tray 2.

(8) In order to improve the releasability from the surface of the cooling drum 16, a scraper 25 having a sharp tip is used.
Can be formed near the opposite surface of the resin extrusion section 9
Are arranged so as to have a width not less than the width of. Then, the film 15 is separated from the surface of the cooling drum 16 by slightly vibrating the scraper 25.

(9) The film unit 205 is connected to the two linear guide rails 8 disposed on the upper part of the packaging machine main body 1 while continuously maintaining the above-mentioned steps (5) to (8). The actuator 7 is controlled to move at a predetermined speed in a direction opposite to the reference position.

(10) The produced film 15 moves while being bonded to the adhesive previously applied to the sealing surface 6 on the tray 2. Although not shown, the film 15 and the adhesive portion of the tray 2 are sealed while being pressed by a moving roller or the like, so that the bonding can be performed firmly. In this case, the moving roller is driven by the actuator Act in the packaging unit 202 shown in FIG.

(11) The film unit 205 is moved up and down by the drive of the linear actuator 5 while moving in the packaging seal direction, depending on the amount of rise of the contents of the tray 2. Further, the width of the film 15 may be changed as necessary depending on the amount of movement in the vertical direction. That is, in one package, the film 15 having a change in the width dimension along the longitudinal direction is generated.

(12) When the packaging and sealing of the required length of the tray 2 is completed, the supply of the heated molten resin from the pressure pump is stopped and the partition plate 29 of the resin extruding section 9 is closed instantaneously to complete the operation. The extrusion of the resin can be stopped.

(13) The entire film unit 205 is moved upward and stopped. In this state, the wrapped and sealed tray 2 is taken out of the tray holder 3.

(14) Thus, one cycle of the packaging process is completed.

[Another Embodiment] Another embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The present embodiment is an automatic packaging apparatus 201 for automatically packaging an article to be packaged after a film is generated. In the above-described embodiment, the adhesive is applied to the sealing surface 6 of the tray 2 in advance, and the film 15 extruded from the film generation unit 4 is positioned on the tray 2 by its own weight. While pressing the film 15 and the bonding portion of the tray 2 by using, for example, the tray 2
5 is used for sealing. On the other hand, the automatic packaging apparatus 201 according to the present embodiment includes the film unit 205
In the packaging unit 202, the film 15 extruded from the film generation unit 4 is guided to the vicinity of the tray 2, and the film 15 is moved above the tray 2 to automatically cover the tray 2 with the film 15. I do.

First, the one shown in FIG.
In this automatic packaging apparatus 201, a tray carrying-in unit 203 and a tray carrying-out unit 204 are provided on the left and right sides of a packaging unit 202, and a film unit 205 is provided on the back of the packaging unit 202. Is formed. Thus, a large number of packages can be continuously packed, but the tray carry-in unit 203 continuously places the tray 2 in the packaging unit 20.
2, the tray unloading unit 204 unloads the wrapped tray 2, and the film unit 205 sequentially sends out the film 15 to the wrapping unit 202.
A detailed description of the structures of the tray carry-in unit 203 and the tray carry-out unit 204 will be omitted. Further, since the film unit 205 has substantially the same structure as that of the above-described embodiment, a detailed description thereof will be omitted.

The packaging unit 202 is provided with a tray holder 3 on which the tray 2 storing the articles to be packaged is placed. On four sides of the tray 2 placed on the tray holder 3, heaters are provided. Four blowers 206 containing H are provided. Further, four film grippers 207 (only two are shown in FIG. 9) for gripping four corners of the film 15 pulled out from the film unit 205 are provided.

The tray 2 has an opening 209 of an upper surface opening with a fitting edge 208 around the periphery.
It has a shape that is widened upward as a whole.

In such a configuration, as shown in FIG. 10, the tray 2 on which the items to be packaged (not shown) are provided from the tray carry-in unit 203 is sent out onto the tray holding table 3 of the packaging unit 202. At the same time, the film 15 is generated and sent out from the film unit 205. This film 15 has four corners at its four corners.
It is grabbed by 07. In this state, the film gripper 207 descends as shown in FIG. 11 while pulling so that the film 15 does not wrinkle, comes into contact with the tray 2, and covers the opening 209 of the tray 2. Further, as shown in FIG. 12, the film gripper 207 descends while rotating, and brings the portion of the film 15 protruding from the tray 2 close to the side surface of the tray 2.

When the end of the film 15 reaches a position lower than the opening 209 of the tray 2 with the film 15 being sufficiently pulled, the blower 20 located around the tray 2
6 is driven to blow hot air to the four sides of the tray 2. Considering the effect on the packaged object, the hot air is preferably sprayed at 120 ° C. for about 3 seconds. The end of the film 15 becomes hot and contracts due to the hot air. Due to this heat shrinkage, the portion of the film 15 protruding from the tray 2 is shrunk to increase rigidity, and goes around the fitting edge 208 to form a solid edge 210 below the fitting edge 208. At this time, the timing of releasing the gripping of the film 15 by the film gripper 207 is performed in accordance with the shrinkage of the film 15 located on the side of the tray 2, and the solid edge 210 is also formed by the four corners of the film 15. The solid edge portion 210 forms the film 15.
Is formed. The solid edge 210 is fitted to the fitting edge 208 of the tray 2 and is not thermally fused to the tray 2. Of course, there is no problem even if it is heat-sealed to such an extent that it can be easily peeled off.
Therefore, when taking out the object to be packaged, the solid edge 210
When the film 15 is removed from the fitting edge 208 of the tray 2 by putting a finger on the tray 2, the film 15 can be easily separated from the tray 2 and the upper surface thereof can be opened without damaging the tray 2.

Next, another embodiment will be described with reference to FIG. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 17 shows an automatic wrapping apparatus 201 provided with a wrapping unit 202 for stretching the film 15. The automatic wrapping apparatus 201 includes a tray loading unit 203 and a tray unloading unit on the left and right sides of the packaging unit 202. A unit 204 is connected to the film unit 205, and a film unit 205 is connected to the back of the packaging unit 202. Thus, a large number of packages can be packed continuously, but the tray carry-in unit 203 continuously places the tray 2 in the packing unit 2.
02, the tray unloading unit 204 unloads the wrapped tray 2, and the film unit 205 sequentially sends out the film 15 to the wrapping unit 202. The tray loading unit 203 and the tray unloading unit 204 are described in detail. The description of the structure is omitted.

The packaging unit 202 includes a tray holding table 3 including a container lifting / lowering mechanism (not shown) for placing and moving the tray 2 up and down, and the packaging unit 202.
And a film gripper 207 used for gripping four corners thereof and also used for stretching, a film pulling mechanism 211 as a film gripper, and a linear actuator 212. The four film pulling mechanisms 211 are configured to move the film pulling mechanism 211 itself back and forth and rotate vertically.
Further, the film pulling mechanism 211 on the two right and left linear motion actuators 212 can also move the automatic packaging device 201 in the front-rear direction, and thereby can grip, release, and stretch the film 15. Note that FIG.
Medium, the linear actuator 212 is the actuator Act
As shown.

On the other hand, the film unit 205 has basically the same configuration as the film unit 205 described with reference to FIGS. The leading end of the film 15 generated by the film unit 205 is sent to the film delivery unit 213. The leading end of the film 15 is set to an initial position so as to slightly protrude from the film delivery unit 213 to the packaging unit 202 side. Controlled.

In such a configuration, the packaging unit 2
When the tray 2 on which the packages (not shown) are mounted on the tray holding table 3 is conveyed from the tray carrying-in unit 203, the linear actuator 212 is operated, and the linear actuator 212 on the linear actuator 212 is located on the front side of the apparatus. The two film grippers 207 grip the film 15 protruding from the film transfer unit 213, and the film 15 is pulled out to the upper part of the tray 2. Thereafter, the two film grippers 207 at the rear grip the film 15. Note that the amount of the film 15 to be pulled out varies depending on the size of the tray 2, and the operation thereof is controlled by a film generation device control unit 301 (see FIG. 18) described later. At this time, the film pulling mechanism 2 which is not involved in pulling out the film 15
Reference numeral 11 is at a position where it does not hinder the pull-out operation.

When the film 15 is pulled out to the upper part of the tray 2, the film pulling mechanism 211 grips the center of the film 15, and the film 15 is stretched by the film pulling mechanism 211 and the film gripper 207. As a result, as shown in FIG. 17, the film gripper 207 grips the four corners of the rectangular film 15 and the film pulling mechanism 211 grips the four points at the center of the film. Then, in order to stretch the film 15 from the center, the film pulling mechanism 211 moves the film gripper 20 from the center of the film 15 outward in a cross shape.
7 performs the operation in the diagonal direction. This allows
Stretching is achieved by pulling the film 15 gripping the film center and four corners at eight points from the center. Here, the pulling operation is performed by the film pulling mechanism 2
11 and the actuator Act (see FIG. 19) of the packaging unit 202 provided on the film gripper 207, but conditions such as a pulling speed and a pulling amount vary depending on the properties of the film 15 and the specifications of the actuator.

It is also possible to perform stretching by providing a rotating mechanism at the film gripping portions of the film pulling mechanism 211 and the film gripper 207. That is, the eight points of the film 15 are gripped by the film pulling mechanism 211 and the film gripping tool 207, and the eight gripping portions are rotated downward by the actuators of the film pulling mechanism 211 and the film gripping tool 207. Thereby, stretching that pulls the film from the center is achieved.

When the film 15 having the four corners is stretched by pulling it from the center by the film pulling mechanism 211, the stretched film 15 is put on the tray 2 and integrated with the tray 2 to be packaged. The film 15 formed and stretched to form the cover 2 constitutes the lid, as described in the first embodiment. The process of forming the lid member of the wrapped tray 2 is as follows.

First, when the state shown in FIG. 17 is attained, the container lifting / lowering mechanism of the tray holding base 3 raises the tray 2 on which the packages are placed, toward the stretched film 15. The rising speed is desirably about 50 mm per second.

When the opening 121 of the packaged object or tray 2 comes into contact with the stretched film 15, the ascending speed is reduced to about 20 mm per second, and the opening 121 is gradually covered. In this case, the periphery of the opening 121 of the tray 2 is a fitting edge. Further, the stretched film 15 is pushed upward by the pressure of the tray 2 or the packaged object, and the film gripper 207 and the film pulling mechanism 2
11 slightly rotates to bring the stretched film 15 of the portion protruding from the opening 121 of the tray 2 close to the side surface of the tray 2.

The end of the stretched film 15 is the tray 2
When the packaging unit 2 reaches the lower part than the opening 121 of
02, the blower 206 located in the tray 2 is driven.
By blowing hot air on the four sides of the tray 2 and fitting the stretched film 15 to the opening 121 of the tray 2, the solid edge 210 can be formed and the tray 2 can be formed.

[Control System] Here, the control system of each part in the automatic packaging apparatus 201 of each embodiment described above will be described. The automatic packaging apparatus 201 according to the embodiment described first differs from the two automatic packaging apparatuses 201 described later in a packaging method using the film 15 for an article to be packaged. The control system introduced here is suitable for the latter automatic packaging apparatus 201. However, the film unit 205 has substantially the same configuration in all the embodiments described above. Therefore, the control system described here uses the film unit 205
The above operation is also applied to the former automatic packaging apparatus 201.

FIG. 18 is a functional block diagram of the automatic packaging apparatus 201. The automatic packaging device 201 includes a device operation / display unit 302 (not shown). The operation / packaging condition data input from the device operation / display unit 302 is input-controlled to the device operation control unit 303, and the operation input to the device operation / display unit 302 by the drive control of the device operation control unit 303.・ Packaging condition data is displayed and output. The packaging condition data input by the device operation / display unit 302 is, for example, data relating to operating conditions such as the number of packages in the tray 2 and packaging conditions such as the thickness and width of the film 15 generated by the film unit 205. is there.

The apparatus operation control unit 303 sends the input operation / packaging condition data to the package information input unit 304, and the package information input unit 304 sends the operation / package information input to the packaging condition setting unit 305. Transfer the packaging condition data. The packaging condition setting unit 305 refers to the packaging condition database 306 and acquires the setting condition of each unit that matches the input packaging condition data. The packaging condition data is, for example, the motor 3 of the film unit 205 that regulates the film 15 to the thickness input as the packaging condition data.
2 (motor M in FIG. 19),
The actuator A of the film unit 205 generates the film 15 having the width input as the packaging condition data.
This is data for driving ct. Then, the packaging condition setting unit 305 transmits and outputs the acquired packaging condition data to the automatic packaging device control unit 307 and the film generation device control unit 301 that controls each unit in the film unit 205.

Thus, in response to a data transmission request from the device operation control unit 303, the film generation device control unit 301
Transmits the packaging condition data to the device operation control unit 303, and upon receiving this, the device operation control unit 303 converts the contents so that the operator can understand it, and
Display output to 2.

Further, the automatic packaging apparatus control section 307, to which the packaging condition data has been transmitted from the packaging condition setting section 305, sets the container indicating that the tray 2 has been inserted into the tray loading unit 203 from the container loading section 308 of the packaging unit 202. A film generation start signal is transmitted and output to the film generation device control section 301 on condition that the presence signal is received. In response, the film generation device control unit 301
The extruding unit 101 and the film generation unit 4 in the film unit 205 start the film generation operation. The film generation operation and the packaging operation based on the subsequent processing are the same as those described in each of the above-described embodiments, and a description thereof will be omitted. The processing itself will be described later in detail.

FIG. 19 shows the automatic packaging apparatus 20 shown in FIG.
FIG. 2 is a block diagram showing electrical connections of respective units for embodying the functional block diagram of FIG. Each part 301, 30 in the functional block diagram of the automatic packaging apparatus 201 shown in FIG.
3, 304, 305, 307 and 308 are CPU 40
1 is a microcomputer including a RAM 402 and a ROM 403, and controls driving of peripheral devices by arithmetic processing of a CPU 401 according to an operation program stored in the ROM 403. As a medium for storing the operation program, in addition to the ROM 403, for example, a hard disk drive (HDD) 404 connected to the CPU 401, an MO (not shown), a DVD-ROM, or a DVD-RAM
An optical information recording medium such as the above is used. Then, each unit 301, 303,
Under the control of 304, 305, 307, and 308, the peripheral device is driven and controlled to perform a desired operation, and the film generation operation and the packaging operation are performed.

Next, the CPU 401, RAM 402 and R
The microcomputer including the OM 403 is connected to each unit of the packaging unit 202, the transport unit 406 including the tray carry-in unit 203 and the tray carry-out unit 204, and the film unit 205 via a system bus 405. Each part includes an actuator Act, a motor M, a piezoelectric element 110 and a heater 105 in the film unit 205, an actuator Act, a heater H, and a blower 20 in the packaging unit 202.
6. Motor M and sensor S in transport unit 406
It is.

FIGS. 20 to 25 show an automatic packaging apparatus 20.
2 is a flowchart showing an outline of a film generation procedure and a packaging procedure in FIG. Hereinafter, the film generation operation and the packaging operation will be described based on this flowchart.

FIG. 20 shows a main routine executed in the automatic packaging apparatus control section 307. In this routine, initial settings are read (step S10).
1) Subsequently, various subroutines are started (step S102). Thus, the subroutine shown in FIGS. 21 to 25 is started.

Therefore, as a subroutine shown in FIG. 21 executed by the apparatus operation control unit 303, standby for input of operating conditions (step S201) and standby for input of packaging conditions (step S202) are executed, and conditions are input. And its condition data (steps S202, S2
04). In response to this, in FIG. 23 showing a subroutine in the packaging condition setting unit 305, if the conditions are set (Y in step S401), for example, the packaging condition database 306 stored in the HDD 404 is searched, and the setting conditions of each unit are determined. Each unit is set according to the acquired and set conditions (step S402). In the main routine shown in FIG. 20, the condition setting is read from the device operation control unit 303 (step S103), and the planned number of packages is set to n (step S104). This planned package number n
Is set in a counter generated in the work area of the RAM 402. Then, the process stands by for the container carry-in determination (step S105).

FIG. 22 shows a subroutine executed in the automatic packaging apparatus control section 307. Container loading section 308
Receiving the container presence signal from the tray loading unit 20
3 is detected (step S301).
(Y), on the condition that the previous packaging operation is completed (Y in step S302), the drive of the actuator Act is controlled and the tray 2 is conveyed by a predetermined amount (step S303), and the actuator Act is similarly driven and conveyed. Tray 2
Is raised (step S304). Then, a film generation start signal is transmitted and output to the film generation device control unit 301 (step S305). Then, FIG.
(Step S306). At this time, in the main routine shown in FIG. 20, the carry-in of the tray 2 is detected by receiving the container presence signal from the container carry-in section 308 (Y in step S105), and the counter using the work area of the RAM 402 is set accordingly. The value is incremented by one (step S106), and the counter value is incremented by one at step S104.
It returns to the processing of step S103 until it reaches n set in.

FIG. 24 shows a film forming apparatus control unit 301.
This is a subroutine executed in. Along with the transmission of the film generation start signal executed in the subroutine executed in the automatic packaging apparatus control unit 307 shown in FIG. 22, the film generation apparatus control unit 301 that has received this film generation start signal (Y in step S411) Then, the film generation operation is started (step S412). Thereafter, the piezoelectric element 110 is driven just before the end of the generation of the film 15 (Step S413), and the smooth separation of the film 15 is promoted. When the generation of the film 15 is completed, a film generation end signal is transmitted and output to the CPU 401 (step S414).

FIG. 25 shows a subroutine executed in the automatic packaging apparatus control section 307. If a film generation end signal is transmitted in step S414 in the subroutine shown in FIG. 24, it is determined in step S501 that a film generation end signal has been received (Y in step S501).
In the packaging unit 202, the film gripping operation, the film moving operation, and the film stretching operation are sequentially executed by the drive control of the actuator Act (Steps S502, S503, and S504). Then, following the raising operation of the tray 2 by the drive control of the actuator Act (step S505), the heater H and the blower 206 are operated.
By the drive control, the edge of the film 15 is heated and melted, whereby the forming operation of the solid edge 210 is executed (step S506). Thus, the tray 2 is wrapped with the film 15. Thereafter, the subroutine shown in FIG. 25 transmits and outputs a packaging completion signal to the CPU 401 (step S507).

As a result, the subroutine shown in FIG. 22 for controlling the drive of the transport unit 406 receives the packaging completion signal (Y in step S306). Then, the tray 2 is transported by a predetermined amount (step S308).

In this way, the packaging operation of one tray 2 with the film 15 is completed. Therefore, in the main routine shown in FIG. 20, when it is determined that the counter value has reached n in step S107, that is, it is determined that the number of actually packed trays 2 has reached the planned number of packages (Y in step S107), After waiting for the final tray 2 to be unloaded from the tray unloading unit 204 (Y in step S108), various subroutine stop processes are performed (step S108).
109), and the process ends.

[0089]

According to the first aspect of the present invention, there is provided an automatic packaging method comprising:
A resin material as a film raw material is melted and extruded from a resin extrusion port, and the extruded resin material is cooled to form a film, and the film immediately after generation is guided to a position of a packaged object stored in a tray. Since the package is packaged with the film immediately after it is produced, it is not necessary to prepare various roll films for packaging, so that the package is packaged while producing the film. This has the effect that a special film can be generated and packaged.

According to a second aspect of the present invention, there is provided an automatic packaging method wherein a film is extruded by extruding a resin material as a film raw material from a resin extrusion port in the vicinity of a tray in which an article to be packaged is stored in a molten state. Since the film extruding mechanism is provided and the object to be packaged is wrapped with the film immediately after the film is produced while the film is being produced by the film extruding mechanism, the packaging is performed to wrap the object while producing the film. There is no need to prepare various roll films for use, and there is an effect that necessary films can be generated and packaged as needed.

According to a third aspect of the present invention, in the automatic packaging method according to the first or second aspect, the thickness of the film formed by changing the gap size of the resin extrusion port is changed, so that the article to be packaged is formed. This has the effect that a film corresponding to the size of the image can be easily generated.

According to a fourth aspect of the present invention, in the automatic packaging method according to the first, second or third aspect, the width of the film formed by changing the size of the resin extrusion opening in the width direction is changed. In addition, there is an effect that a film according to the size of an article to be packaged can be easily generated.

According to a fifth aspect of the present invention, in the automatic packaging method according to the first or second aspect, the resin material extruded from the resin extrusion port is adhered to the surface of a rotating cooling drum to be cooled. There is an effect that the resin material cooled and solidified by being extruded from the extrusion port and adhered to the surface of the cooling drum can be guided in the direction of the packaged object stored in the tray by the rotation of the cooling drum.

According to a sixth aspect of the present invention, in the automatic packaging method according to the fifth aspect, the rotation speed of the cooling drum is varied according to the thickness of the film to be formed. Can be surely cooled and solidified to form a film.

The automatic packaging apparatus according to the seventh aspect of the present invention comprises a film extruding mechanism for extruding a film by extruding a resin material as a film raw material from a resin extruding port in a molten state, and rotating the extruded film. A film forming mechanism that solidifies the film by adhering it to the surface of the cooling drum and cooling it, and a packaging mechanism that guides the film immediately after generation to the position of the object to be packaged and wraps the object with the film. Since it is provided, it is possible to generate a film necessary for packaging an article to be packaged, and to solidify and immediately package it, which has an effect that film generation and packaging can be easily performed by the same device. .

According to an eighth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, since the extrusion size of the resin extrusion port can be changed, a film according to the size of the article to be packaged can be easily generated. Has an effect.

According to a ninth aspect of the present invention, there is provided the automatic packaging apparatus according to the seventh aspect, wherein a partition plate is provided over the entire width of the resin extrusion opening, and the partition plate is moved up and down to fix the position of the film. Since the thickness of the film can be controlled by adjusting the flow rate of the raw material, there is an effect that a film having the required strength can be easily generated according to the contents to be packaged.

According to a tenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a partition bar slid in the width direction is provided at the resin extrusion port, and the partition bar is slid to fix the position. Since the width dimension of the film to be formed can be controlled, it is possible to easily produce a film according to the size of the packaged object.

According to an eleventh aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the resin extruding port is positioned at a position equal to or above the center of the cooling drum so as to have a certain gap with the cooling drum. Is arranged upward, the film immediately after extrusion can be immediately caught and adhered to the surface of the cooling drum, which has an effect that a smooth film having a constant thickness can be produced.

According to a twelfth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the cooling drum has a thin hollow structure, and the support shafts on both sides of the cooling drum have a hollow structure so that a fluid can pass through the inside thereof. Since a rotary joint and piping are connected to these support shafts to allow cooling water or cooling air to pass through, it is possible to obtain a cooling drum that can effectively cool and solidify a film immediately after generation at high temperature and softness. It has the effect of being able to.

According to a thirteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, since the surface of the cooling drum is processed with a fluorine resin, the film can be easily peeled off from the cooling drum, and the packaging with a thin film can be performed. Can be easily performed.

According to a fourteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, the number of revolutions of the cooling drum can be variably controlled, so that the film forming speed can be easily changed and the resin pressing speed can be reduced. This has the effect that the resin material extruded from the outlet can be reliably cooled and solidified to form a film.

According to a fifteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a film extrusion mechanism having a resin extrusion port and a film generation mechanism having a cooling drum are integrally mounted on a support frame. Since the elevating mechanism for raising and lowering the support frame in the upper surface direction of the package is provided, there is an effect that the package can be easily packaged.

According to a sixteenth aspect of the present invention, in the automatic packaging apparatus according to the seventh aspect, a scraper is provided on the peeling side of the film, the scraper having a sharp end pointed upward by contacting a cooling drum or providing a small gap. This has the effect that the film can be easily separated from the cooling drum.

According to the seventeenth aspect of the present invention, in the automatic packaging apparatus according to the sixteenth aspect, since the entire scraper is minutely vibrated, the film can be easily peeled off from the cooling drum. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an internal structure of a packaging device as an embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing an internal structure of the packaging device.

FIG. 3 is a vertical sectional side view showing a film pushing mechanism.

FIG. 4 is a front view showing the inside of the packaging device.

FIG. 5 is a perspective view showing a structure of a scraper.

FIG. 6 is a perspective view of a mechanism for adjusting the thickness of the film.

FIG. 7 is a vertical sectional side view thereof.

FIG. 8 is a perspective view of a mechanism for adjusting the width of the film.

FIG. 9 is an external perspective view showing a packaging device as another embodiment of the present invention.

FIG. 10 is a front view of a state where a film is drawn out to an upper part of a container.

FIG. 11 is a front view showing a state where a film is positioned on an upper portion of a container.

FIG. 12 is a front view of a state in which a portion of the film that has protruded from the container is pulled down to the side of the container.

FIG. 13 is a perspective view showing a state where a film is positioned on an upper portion of a container.

FIG. 14 is a perspective view of a state where a film is positioned and stretched on an upper portion of a container.

FIG. 15 is a front view of a state in which hot air is sprayed on the film and the film starts to shrink.

FIG. 16 is a front view showing a state where a solid edge portion is formed by a film.

FIG. 17 is a perspective view showing the inside of a packaging device as another embodiment of the present invention.

FIG. 18 is a functional block diagram of a control system.

FIG. 19 is a block diagram of a control system.

FIG. 20 is a flowchart illustrating a main routine for film generation processing and packaging processing.

FIG. 21 is a flowchart illustrating a subroutine executed by an apparatus operation control unit.

FIG. 22 is a flowchart showing a subroutine executed by the automatic packaging device control unit.

FIG. 23 is a flowchart illustrating a subroutine executed by a condition setting unit.

FIG. 24 is a flowchart illustrating a subroutine executed by a film generation device control unit.

FIG. 25 is a flowchart showing a subroutine executed by the automatic packaging device control unit.

[Description of Signs] 2 tray 13 film extrusion mechanism 14 nozzle 15 film 16 cooling drum 18 support shaft 21 rotary joint 22 piping 24 film generation mechanism 25 scraper 29 partition plate 36 partition bar 51 packaging mechanism 52 elevating mechanism

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E049 AA01 AB03 DA10 EA07 EB02 FA02 3E050 AA02 AA03 AA07 AB02 BA17 DG04 HB02

Claims (17)

[Claims] 1. A film is formed by melting a resin material as a film raw material, extruding the resin material through a resin extrusion port, and cooling the extruded resin material to form a film. An automatic packaging method, wherein the package is guided to a position and is wrapped with a film immediately after generation. 2. In the vicinity of a tray in which an article to be packaged is stored,
A film extruding mechanism for extruding a film by extruding a resin material serving as a film raw material from a resin extruding port in a molten state is provided. An automatic packaging method characterized by being packaged with a film. 3. The automatic packaging method according to claim 1, wherein the thickness of the film formed by varying the size of the gap between the resin extrusion ports is varied. 4. The automatic packaging method according to claim 1, wherein the width of the film formed is varied by varying the size of the resin extrusion port in the width direction. 5. The automatic packaging method according to claim 1, wherein the resin material extruded from the resin extrusion port is adhered to the surface of a rotating cooling drum and cooled. 6. The automatic packaging method according to claim 5, wherein the rotation speed of the cooling drum is varied according to the thickness of the film to be formed. 7. A film extruding mechanism for extruding a film by extruding a resin material as a film raw material from a resin extruding port in a molten state, and adhering the extruded film to the surface of a rotating cooling drum for cooling. An automatic packaging apparatus, comprising: a film generation mechanism for solidifying a film by performing the process; and a packaging mechanism for guiding the film immediately after generation to a position of an object to be packaged and packaging the object to be packaged with the film. . 8. The automatic packaging apparatus according to claim 7, wherein the resin extrusion port can change the extrusion size. 9. A partition plate is provided over the entire width of the resin extrusion opening, and the partition plate is moved up and down to fix the position so that the flow rate of the heated and melted film material can be adjusted to control the thickness of the film. The automatic packaging apparatus according to claim 7, wherein 10. A width of a film to be extruded can be controlled by arranging a partition rod slid in a width direction at a resin extrusion port, and sliding and fixing a position of the partition rod. The automatic packaging apparatus according to claim 7, wherein 11. The automatic extruder according to claim 7, wherein the resin extruding port is disposed upwardly at a position equal to or higher than the center of the cooling drum so as to have a certain gap with the cooling drum. Packaging equipment. 12. A cooling drum having a thin hollow structure, supporting shafts on both sides of the cooling drum having a hollow structure through which a fluid passes, and a rotary joint and piping connected to these supporting shafts to form cooling water. 8. The automatic packaging apparatus according to claim 7, wherein cooling air is passed. 13. The automatic packaging apparatus according to claim 7, wherein the surface of the cooling drum is processed with a fluorine resin. 14. The automatic packaging apparatus according to claim 7, wherein the number of rotations of the cooling drum can be variably controlled. 15. An elevating mechanism for integrally mounting a film extruding mechanism having a resin extrusion port and a film generating mechanism having a cooling drum on a support frame and moving the support frame up and down in the direction of the upper surface of the article to be packaged. The automatic packaging apparatus according to claim 7, wherein 16. The automatic packaging apparatus according to claim 7, wherein a scraper having a sharp end pointed upward with a contact or a minute gap with the cooling drum is provided on the peeling side of the film. 17. The automatic packaging apparatus according to claim 16, wherein the entire scraper is finely vibrated.