JPH06144411A - Packing device having automatic changingover device of film - Google Patents

Abstract

PURPOSE:To effectively utilize the space and reduce discontinued times even when the film of same width is used, by providing a means of memory and detection of the width, a detection means of completion, and a judging means of changingover according to the film width, in a packing device automatically selecting and changingover the upper and lower rolls of film. CONSTITUTION:When a film has been exhausted in the just prior packing, CPU in the controller judges whether the same kind of film roll is set or not in other stages by a control program contained in ROM (ST1). Subsequently, it judges whether or not the film roll on the other stages has finished (ST2) and if it not yet finished, the used film is changed over to other stage (ST4). Next, the stage where the using film set to be stored in the memory of using stage is positioned, is stored in the memory. Namely, a plug is changed over (ST5). When the film roll in the film set of the other stage has been finished in the step ST2, it is indicated (ST3).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to set film rolls having different film widths and the like in a plurality of film setting parts and automatically switch the film to be used according to the type of product to be packaged. The present invention relates to a packaging device provided with a so-called automatic film switching function.

[0002]

2. Description of the Related Art Stretch film packaging apparatus having a function of automatically switching the film to be used in accordance with the type of product to be packaged by setting film rolls having different film widths in the upper and lower film setting sections. Is being developed. For example, US Pat. No. 4,501,
No. 106 and Japanese Patent Application No. 3-100134 disclose a packaging device having such a film automatic switching function.

[0003]

However, even in the packaging apparatus having the above-mentioned automatic film switching function, the products to be packaged are limited depending on the user, and one type (same film width) is used. Sometimes only the film of is used. In such a case, conventionally, the film roll of the film to be used may be set in one of the upper and lower film set sections and the other film set section may be used in an empty state (a state in which the film roll is not set). Many. For this reason, the film setting part of the packaging machine is not effectively used, and the operation of the packaging machine must be stopped each time due to the frequent occurrence of film end, which causes the problem of poor operating efficiency of the packaging machine. there were.

Conventionally, film rolls of the same type (same film width) have been set in two film set portions, and when one film roll is finished, the film is automatically switched to another film roll and continuously wrapped. There is also a packaging device that can be used (Shokai Sho 51-25670)
Issue). However, this packaging device can only set film rolls of the same type (same film width) in the two film setting parts, and sets different types of film rolls in the two film setting parts, respectively. Therefore, it is impossible to switch the film for packaging.

The present invention has been made in view of the above points, and is a packaging apparatus having an automatic film switching function capable of automatically switching and packaging a film according to the product to be packaged as described above. Even if only one type of film is used, it is equipped with an automatic film switching function that can effectively use the space in the film setting section and significantly reduce the number of times the packaging machine stops due to the end of film compared to the past. The present invention aims to provide a packaging device.

[0006]

In order to solve the above problems, the present invention comprises an upper film setting section and a lower film setting section capable of setting film rolls having different widths, and the upper and lower film setting sections. A film roll is set in each of the set parts, one film is automatically selected according to the product to be packaged, and a packaging device having a film automatic switching function for packaging the product using the selected film, Set film detecting means for storing or detecting the film width of the film rolls currently set in the upper and lower film setting sections, and film end for detecting the film end of the film rolls set in the upper and lower film setting sections Set the detection means and the film end detection means in the film setting section of the currently used stage. When the film end of the film roll is detected, the judgment means for judging whether or not the film width of the film roll set in the film setting section of the other stage is the same, and the judgment means is set in the film setting section of the other stage. If it is determined that a film roll having the same film width is set, then the film roll film set in the film setting section of the other stage is used until the film end detection means detects the film end. And a used film switching means.

Further, a plurality of film setting parts capable of setting films having different widths are provided, and film rolls are set in the plurality of film setting parts, respectively, and a film to be used according to a product to be packaged. In a packaging device having an automatic film switching function for automatically selecting and packaging the product using the selected film, the film width of the film roll currently set in each of the plurality of film setting units is stored or Set film detecting means for detecting, film end detecting means for detecting the film end of film rolls set in a plurality of film setting parts, and film roll set in the film setting part where the film end detecting means is currently used When the end of the film is detected, the other film set section If the judging means judges whether or not the film rolls having the same film width are set, and the judging means judges that the film rolls having the same film width are set in the other film setting section, In the case of using a film having the film width, the film roll of the film roll set in the other film setting section is used until the film end detection means detects the film end. It is characterized by that.

According to the present invention, as described above, when the film end detection means detects the end of the film of the film roll set in the film set section of the currently used stage, the film set section of the other stage is detected. If it is judged whether the film type (film width) of the film roll set in the same is the same, and it is judged that the film roll of the same film width is set in the film setting section of the other stage, Since the film of the film roll set in the film setting section of the other stage is used until the film is finished, when the film setting section is in the upper and lower stages, the number of operation stoppages of the packaging device due to the end of the film is about half that of the conventional case. Can be Further, when the film setting section is provided in more than two upper and lower stages, the number of times the packaging device is stopped can be further reduced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, the basic configuration of the packaging apparatus of the present invention and the automatic film switching mechanism will be described. FIG. 2 is a side view showing the overall configuration of the present packaging device. As shown in FIG. 2, the present packaging apparatus includes a supply unit A that supplies a product a that is an object to be packaged.
A weighing conveyor section B for weighing the product a, an elevator section C for pushing up the product a placed on the top, a film supply section D provided with film setting sections in two upper and lower stages, and a film from the film supply section D. A film pull-out portion E for pulling out the film, a film clamp portion F for holding the edge of the film and tensioning the film, a film folding portion G for folding the end of the film to the bottom of the product a, and carrying out the packaged product a It is composed of a conveyor unit H.

As described above, the film supply section D is provided with the film setting section at the upper and lower stages, and the roller 10 for mounting the film roll F1 is provided on the upper film setting section 101.
1a and 101a are rollers 102a and 102 for mounting the film roll F2 on the lower film setting section 102.
a are provided respectively. The rollers 101a and 102a are adapted to rotate in association with the rotation of the feeding rollers 106 and 107 by means of round belts (not shown). Film f1 from film roll F1
Is fed by a feeding roller 106, and the film f2 from the film roll F2 is fed by a feeding roller 107.

In the film supply section D, a film end detector 104 for detecting the vicinity of the end of the film f1 from the film roll F1 and a film end detector for detecting the vicinity of the end of the film f2 from the film roll F2. 105 is provided. A film supply frame 103 is provided at the film supply end of the film supply section D,
As will be described later in detail, the film supply frame 103 has upper and lower supply ports 103a and 103 into which the front ends of the films f1 and f2 from the film rolls F1 and F2 are inserted.
b is provided.

The film supply frame 103 can be moved up and down by an air cylinder 108 that is electromagnetically driven. When the film supply frame 103 is in the lower position, the film drawing portion E is supplied from the supply port 103a.
With the holding member 201, the leading end of the film f1 and the leading end of the film f2 can be held and pulled out from the supply port 103b when in the upper position. That is, the film f1 is formed by the film supply frame 103 and the air cylinder 108.
To f2 or from film f1 to f2 constitutes a film switching mechanism. Also,
A cutter 119 for cutting the film is arranged in front of the film supply frame.

FIG. 3 is a diagram showing details of the film switching mechanism. As shown, the film supply frame 103
Attaches the lower guide frame 110 to the upper end of the rod of the air cylinder 108 via the attachment plate 109, and the upper guide frame 1 is mounted on the lower guide frame 110.
11 is attached, and a cover frame 112 is attached to the upper surface thereof. Guide rollers 113 and 114 are provided in the lower guide frame 110 and the upper guide frame 111, respectively. A lower guide plate 110a is formed at the tip of the lower guide frame 110, and a lower guide plate 110b paired with the lower guide plate 110a is formed on the lower surface of the tip of the upper guide frame 111, and both upper and lower guide plates 110a are formed. , 110b form the lower supply port 103b described above.

Further, a lower guide plate 111a is formed at the tip of the upper guide frame 111, and an upper guide plate 111b paired with the upper guide plate 111a is formed at the tip of the cover frame 112, and both upper and lower guide plates are formed. The upper supply port 103a described above is formed by 111a and 111b. The upper and lower guide plates 110a and 110b and the upper and lower guide plates 111a and 111b of the film supply frame 103 are formed in a comb shape.
Note that 115 and 116 are screws for adjusting the gap between the upper supply port 103a and the lower supply port 103b, respectively.

The upper guide frame 111 and the cover frame 112 are openable and closable about a support shaft 117. When loading a film, the upper guide frame 111 and the cover frame 112 are supported by the support shaft 1.
17 is rotated about the center to open (state of two-dot chain line), the leading end of the film f1 is guided and supported on the lower guide plate 110a, and then the upper guide frame 111 is closed.
The leading end of the film f2 is guided and supported on the upper guide plate 111a of 11, and then the cover 112 is closed.

4 and 5 are views showing the details of the gripping member 201 of the film drawing portion E, FIG. 4 is a plan view, and FIG.
5A is a side sectional view, and FIG. 5B is a side view. The holding member 201 connects the connecting member 204 across the sliders 203, 203 slidably attached to the guide member 202, attaches the upper fixed holding member 205, and moves the lower surface facing the fixed holding member 205. The grip plate 206 is attached so as to be vertically swingable. Fixed grip member 205
Also, the tip end of the movable grip plate 206 is the film supply frame 10 described above.
The upper and lower guide plates 110a and 110b and the upper and lower guide plates 111a and 111b are formed in a comb-teeth shape so that the film in the upper supply port 103a or the lower supply port 103b can be held.

The movable gripping plate 206 is divided into a central gripping plate 206a and left and right gripping plates 206b, 206b having substantially the same width in three divisions. 206b and 206b are fixed to the rotary shaft 208 so as to project therefrom.

The rotating shafts 207, 208 are rotatably supported by the sliders 203, 203 by bearings, the rotating shaft 207 is connected to an arm 212 operated by an air cylinder 211, and the rotating shaft 208 is an air cylinder. It is connected to the arm 214 which is operated by 213. By the operation of each of the air cylinders 211 and 213, the central gripping plate 206a and the left and right gripping plates 206b and 206 are rotated through the rotary shafts 207 and 208.
b and oscillate respectively. A member such as felt is bonded to the tip of the fixed grip plate 205 and the tip of the movable grip plate 206.

In the initial position of the pulling arm (not shown), the gripping member 201 stands by in the lower position of the movable gripping plate 206, that is, in the state where the fixed gripping plate 205 and the movable gripping plate 206 are open, and the pulling arm swings. When the film gripping position is reached by the film f1 in the upper supply port 103a or the lower supply port 103b of the film supply frame 103,
Alternatively, the film f2 is gripped by simultaneously moving up the central grip plate 206a and the left and right grip plates 206b, 206b. Then, the sliders 203, 203 are connected to the guide member 202.
Pull the film out by moving it along. In FIG. 3, 120 is an upper clamp plate that constitutes the rear clamp of the film clamp part F, 117 is a lower clamp plate, and 118 is a lower clamp plate 11 fixed to the upper part of the rod.
7 is an air cylinder that contacts and separates the upper clamp plate 120 and the upper clamp plate 120.

The details of the supply section A, the weighing conveyor section B, the elevator section C, the film pull-out section E, the film clamp section F, the film folding section G, and the carry-out conveyor section H which compose the present packaging apparatus are described in, for example, Japanese Patent Application No. Flat 3-10013
No. 4, etc., and is not directly related to the present invention,
The description is omitted.

Next, the control unit of the packaging device will be described. FIG. 6 is a block diagram showing the overall configuration of the control unit. As shown in the figure, the control section is composed of a weighing and pricing machine control section 10 and a packaging machine control section 30. Weighing price machine control unit 10
Is a display unit 12 for performing various displays, an operation unit 13 for performing various operations, a weighing unit 14 for inputting weighing information from the weighing conveyor unit B, various information is printed on a label, and a label on which the information is printed is attached. A printing and pasting unit 15, an interface 16 for transmitting and receiving data between the weighing and pricing machine control unit 10 and the packaging machine control unit 30, a ROM 17 for storing data such as various programs, a RAM 18 for storing various data, and the like. It is composed of a central processing unit (CPU) 11 that controls and processes each part of the.

Although not shown, the CPU 1
1, display unit 12, operation unit 13, interface 16, R
The OM 17 and the RAM 18 are housed in the console box, and are arranged above the carry-in side of the packaging device on which the articles to be packaged are loaded.
The label-printing / adhering portion 15 is arranged above the conveying path for the packaged products.

The packaging machine control unit 30 includes an interface 32 for transmitting and receiving data between the weighing and pricing machine control unit 10 and the packaging machine control unit 30, a ROM 33 for storing data such as various control programs, and various types. RA where data is stored
M34, a display unit 35 that performs various displays, an operation unit 36 that performs various operations, a supply drive control unit 37 that drives and controls the supply unit A that supplies the packaged product, and a size detection unit that detects the size of the packaged product. 38, an elevator drive control section 39 for driving and controlling the elevator section C, a film drawing drive control 40 for driving and controlling the film drawing section E,
A film folding drive control unit 41 that drives and controls the film folding unit G, a unloading drive control unit 42 that drives and controls the unloading unit H, and a central processing unit (CPU) 31 that controls and data-processes each of these units. To be done.

FIG. 7 is a diagram showing the detailed construction of the film drawing drive control section 40. Film drawing drive control unit 40
Is an I / O port 40-1, a gripping member drive unit 40-2 that drives a pullout arm that moves the gripping member 201, a front clamp drive unit 40-3 that drives a front clamp (movable grip plate 206), and a rear clamp. (Lower clamp plate 117) The rear clamp drive unit 40-4 to drive, the cutter drive unit 40-5 to drive the cutter 119, the film supply frame drive unit 40-6 to drive the film supply frame 103, and the vicinity of the end end of the film. It is composed of a film end edge detecting section 40-7 for detecting.

The output of the gripping member driving section 40-2 is connected to a motor M for driving an arm for moving the gripping member 201, and the output of the front clamp driving section 40-3 is the movable gripping plate 20.
6 is connected to the air cylinders 211 and 213,
The output of the rear clamp drive unit 40-4 is connected to the air cylinder 118 that drives the lower clamp plate 117 of the rear clamp, and the output of the film supply frame drive unit 40-6 is connected to the air cylinder 108 that moves the film supply frame 103 up and down. It is connected. The film end detectors 104-7 are connected to the film end detector 40-7. The film pull-out drive control unit 40 sends and receives data to and from the CPU 31 via the I / O port 40-1.

In the film pull-out control section having the above-mentioned structure, for example, of the film end detector 104, the vicinity of the end end of the film f1 from the film roll F1 set in the currently used upper film setting section 101 is detected. In the case where it did, and the lower film setting section 10
Film f of film roll F2 set to 2
When 2 is a film having the same film width as the film f1, in this embodiment, the film f2 from the film roll F2 is automatically switched and used. The details will be described below.

The RAM 34 of the packaging machine control unit 30 has a structure shown in FIG.
A set film storage unit 34a and a use stage storage unit 34b are provided as shown in FIG.
4a indicates the type (film width) of the film f1 of the film roll F1 set in the upper film setting section 101 and the type (film width) of the film f2 of the film roll F2 set in the lower film setting section 102. Is remembered. As for the type of film,
For example, as shown in FIG. 9, there are film type numbers and film widths corresponding to them, and the operator operates the operation unit 13 of the weighing value attaching machine control unit 10 to input. Note that the film width may be directly input instead of the type number. Further, the film width of the set film roll may be automatically detected by a sensor and stored.

When the film rolls of the same type of film are set in the upper film setting section 101 and the lower film setting section 102, the used step storage section 34b indicates whether the currently used film setting section is the upper step or the lower step. Remember whether or not. The set film storage unit 34a and the used stage storage unit 34b (RAM 34) are backed up by a non-volatile memory or a battery if volatile so that the stored contents can be retained even when the power is turned off. Further, a film width detection sensor and a detection sensor for detecting the film setting portion in which the film which has been used up to the previous time is set may be provided, and the initial setting may be performed when the power is turned on.

The film end detectors 104 and 105 detect the vicinity of the film end. If the film end detectors 104 and 105 do not turn on when the film is pulled out, it is determined that the film has ended. Therefore, the judgment as to whether or not the film is finished is made when the film is pulled out. That is, when the film end detectors 104 and 105 are off because no tension is applied to the film, it is determined to be near the film end end. Further, each of the film end detectors 104 and 105 is arranged in such a position that the film length that allows one wrapping remains even if the film end is detected.

If the end of the film is detected at the end of one packaging cycle, that is, if the film is finished in the previous (immediately before) packaging, the CPU of the packaging machine control unit
A control program 31 stored in the ROM 33 performs processing as shown in the flowchart of FIG.

First, it is determined whether or not a film roll of the same type of film is set in the film setting section of the other stage (step ST1). Then, it is judged whether or not the film roll of the film setting section of the other stage has finished the film (step ST2), and if the film has not ended, the film used is switched to the film of the film setting section of the other stage (step ST4). . Specifically, the film supply frame drive unit 40-6 moves up or down the air cylinder 108 that moves the film supply frame 103 up and down.
Then, the stage in which the film setting section of the film being used stored in the used stage storage section 34b is stored. That is, the flag of the used film setting section is switched (step ST5).

In step ST2, when the film roll of the film setting section of the other stage has finished the film, the display section 35 displays the end of the film.

In the above embodiment, there are two types of film setting parts, the upper and lower stages, but the present invention is not limited to this. For example, the film setting parts are respectively provided in the upper, middle and lower stages. The same operation can be performed even when the film rolls of the types of films can be set. In this case, it is conceivable to set film rolls with the same film width on the upper, middle, and lower stages, but set a film roll with a frequently used film width on only two of the stages and use it on the other stages. It is also possible to set a film roll with a film width that is infrequent.

The point of the present invention is that the film currently in use is used up continuously, so when film rolls of the same type (same film width) are set in a plurality of film setting sections, It is to remember which film is currently used and use the next film when there is no more film currently in use. Otherwise, depending on the conditions, films of the same type may be used in parallel, and the films may not be exchanged effectively.

In the embodiment, the detection of the end of the film is performed.
The tension when the film is pulled out is detected, but the invention is not limited to this configuration. For example, an end mark is formed near the end edge of the film and the end mark is detected by a sensor. A method such as doing is also conceivable. The point is that it can be detected that the end of the film is near. Further, theoretically, the sensor does not detect the vicinity of the end end of the film, but the amount of use of the film is cumulatively stored from the first start, and the vicinity of the end end of the film is detected from the accumulated storage value. Good.

[0036]

As described above, according to the present invention, the following excellent effects can be obtained. (1) When the packaging device uses only one type of film, if the same film is set in the film setting section, when one disappears, the other film is continuously switched and used. Therefore, the number of times that the operation of the packaging device is stopped due to the end of the film can be significantly reduced. When the film setting parts are provided in two steps, the number can be reduced to about half.

(2) The continuous switching use of the same type of film is performed by detecting the type of the film set in the film setting section and automatically judging it. It will not increase.

(3) The space of the film setting portion of the packaging device can be effectively utilized.

(4) The use of the automatic film switching mechanism is widened, and the range of users for this type of packaging machine is widened.

[Brief description of drawings]

FIG. 1 is a diagram showing a flow of film switching processing by a control program of a packaging apparatus of the present invention.

FIG. 2 is a side view showing the overall configuration of the packaging device of the present invention.

FIG. 3 is a diagram showing a configuration of a film switching mechanism of the packaging device of the present invention.

FIG. 4 is a plan view showing a configuration of a film gripping member of the packaging device of the present invention.

5A and 5B are views showing a configuration of a film gripping member of the packaging apparatus of the present invention, FIG. 5A is a side sectional view, and FIG. 5B is a side view.

FIG. 6 is a block diagram showing an overall configuration of a control unit of the packaging device of the present invention.

FIG. 7 is a block diagram showing a configuration of a film drawing drive control unit of the control unit of the packaging apparatus of the present invention.

FIG. 8 is a diagram illustrating an example of a storage unit of a RAM of a packaging machine control unit.

FIG. 9 is a diagram showing an example of film types.

[Explanation of symbols]

 A supply section B weighing conveyor section C elevator section D film supply section E film drawing section F film clamp section G film folding section H transport conveyor section 10 weighing machine controller 11 CPU 12 display section 13 operation section 14 weighing section 15 label Printing and pasting section 16 Interface 17 ROM 18 RAM 30 Packaging machine control section 31 CPU 32 Interface 33 ROM 34 RAM 35 Display section 36 Operation section 37 Supply drive control section 38 Size detection section 39 Elevator drive section 40 Film pull-out drive control section 41 Film folding Drive control unit 42 Carry-out drive control unit

Claims (2)

[Claims] 1. An upper stage film setting section and a lower stage film setting section each capable of setting film rolls having different widths, and film rolls are set in the upper and lower stage film setting sections, respectively, and packaged. In a packaging device having an automatic film switching function for automatically selecting one film according to a product and packaging the product by using the selected film, the film is currently set in the film setting section in each of the upper and lower stages. A set film detection means for storing or detecting the film width of the film roll that is present, a film end detection means for detecting the film end of the film rolls set in the upper and lower film setting parts, and the film end detection means The film end of the film roll set in the film setting section of the stage being used When the completion is detected, a determining unit that determines whether or not the film widths of the film rolls set in the film setting units of the other stages are the same, and the determining unit determines the film width of the same film in the other film setting units. When it is determined that the film roll is set, the film of the film roll set in the film setting section of the other stage is used until the film end detection means detects the film end. And a packaging device having an automatic film switching function. 2. A plurality of film setting portions each capable of setting film rolls of different widths,
A film roll is set in each of the plurality of film setting parts, a film to be used is automatically selected according to a product to be packaged, and a film automatic switching function for packaging the product using the selected film is provided. In the packaging apparatus, set film detection means for storing or detecting the film width of the film rolls currently set in each of the plurality of film setting parts, and film end of the film rolls set in the plurality of film setting parts When detecting the end of the film roll of the film roll set in the film set part currently used film end detection means to detect the film end detection means, to the film roll set in another film set part Judgment means for judging whether or not there are films with the same film width When the judging means judges that the film roll having the same film width is set in the other film setting section, when the film having the film width is subsequently used, it is set in the other film setting section. A packaging apparatus having an automatic film switching function, comprising: a film switching means for using the film of the film roll until the film end detecting means detects the film end.