Packaging device

Abstract

To provide a packaging device suppressing heat generation caused by repeatedly performing holding and non-holding of a film.SOLUTION: There are provided packaging means for packing an object by folding a film, film holding part for repeatedly performing holding and non-holding of the film when feeding a wound roll film, drive means for driving the film holding part, and cooling means for cooling the drive means.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a packaging machine. [Background technology]

[0002] 2. Description of the Related Art A packaging device that wraps an object by folding a film is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-057004 A Summary of the Invention [Problem to be solved by the invention]

[0004] The wrapping device as described above is equipped with a mechanism for sequentially feeding the film to a position where the wrapping process is performed, and the mechanism has a film gripping unit that repeatedly grips and releases the film. This film gripping unit is operated by turning a solenoid on and off, but there is a problem in that the solenoid heats up with continued use, causing problems with gripping and release of the film. [Means for solving the problem]

[0005] In view of the above problems, the present invention has at least the following configuration. A wrapping means for wrapping an object by folding the film, a film gripping unit for repeatedly gripping and unclipping the film when feeding the rolled film, a driving means for driving the film gripping unit, and a cooling means for cooling the driving means. The film gripping section has a plurality of film gripping sections, at least one of which is a film gripping section that is movable by a first predetermined width in the width direction of the film, and a cooling means provided for a driving means that drives the movable film gripping section is configured to be movable together with the film gripping section. The packaging device is characterized by the above. [Brief description of the drawings]

[0006] [Figure 1] 1 is a perspective view showing an example of a packaging device according to an embodiment of the present invention. [Diagram 2] 1 is a schematic side view illustrating an example of a packaging device according to an embodiment of the present invention. [Diagram 3] 1 is a schematic front view illustrating an example of a packaging device according to an embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view illustrating an example of a guide unit, a film gripping unit, and a detection unit of the packaging device according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a partially enlarged perspective view for explaining an example of a guide section, a film gripping section, a driving means, a cooling means, and a detection section. [Figure 6] 2 is a conceptual plan view showing an example of a guide section, a film gripping section, a driving unit, and a cooling unit of the packaging device according to the embodiment of the present invention. FIG. [Figure 7] FIG. 13 is a diagram showing an example of a film and a guide portion. [Figure 8] FIG. 1 is a diagram showing an apparatus of a comparative example. [Figure 9] FIG. 13 is a diagram showing an example of a setting screen for an opening position information table. [Figure 10] FIG. 11 is a diagram for explaining an example of the operation of detecting the position of a guide section of a packaging device; in detail, (a) is a diagram showing an example of the arrangement of the guide section and an example of the operation of the film feed section when the film width is long; (b) is a diagram showing an example of the light intensity received by the detection section; (c) is a diagram showing an example of the arrangement of the guide section and an example of the operation of the film feed section when the film width is short; and (d) is a diagram showing an example of the light intensity received by the detection section. [Figure 11] 13 is an example of a display panel reporting a solenoid current value error. [Figure 12] FIG. 2 is a diagram showing an example of an electrical functional block of the packaging device according to the embodiment of the present invention. [Figure 13] 5 is a flowchart for explaining an example of an operation of the packaging device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] This embodiment discloses the following features. The first feature is that the packaging device has a packaging means that wraps an object by folding the film, a film gripping unit that repeatedly grips and releases the film when feeding out the rolled up roll film, a driving means that drives the film gripping unit, and a cooling means that cools the driving means (see Figures 5, 6, etc.). According to this configuration, the driving means for driving the film gripping portion can be prevented from becoming heated.

[0008] A second feature is that the film gripping portion has a plurality of film gripping portions, at least one of which is a film gripping portion that is movable within a first predetermined width in the width direction of the film, and a cooling means provided for a driving means that drives the movable film gripping portion is configured to be movable together with the film gripping portion (see Figure 6). According to this configuration, the driving means for the moving film gripping portion can be cooled whenever necessary.

[0009] A third feature is that the other of the multiple film gripping parts is a film gripping part that is movable in the width direction of the film at a second predetermined width that is smaller than the first predetermined width, and a cooling means provided for a driving means that drives the film gripping part that is movable at the second predetermined width is provided on a frame of a housing part of the packaging device (see Figure 6). According to this configuration, the driving means of the film gripping portion can be cooled without complicating the structure and wiring for arranging the cooling means, thereby reducing costs. The driving means and the cooling means may be slightly separated, but this is not so large that the cooling effect is impaired.

[0010] The fourth feature is that the cooling means is a blower fan (see FIG. 5). According to this configuration, the cooling means is simple, and sufficient cooling can be achieved even if the driving means for the film gripping portion and the cooling means are slightly separated from each other.

[0011] A fifth feature is that the blower fan is disposed below the film gripped by the film gripping portion (see FIG. 5). According to this configuration, the film is less likely to be disturbed by the blowing air, and the film can be transported appropriately.

[0012] A sixth feature is that the blower fan is disposed so as to blow air diagonally downward (see FIG. 5). According to this configuration, the film is further prevented from being disturbed by the air blown, and the film can be transported more appropriately.

[0013] A seventh feature is that the packaging device further has a control unit, which controls the driving of the cooling means in response to the driving control of the driving means. According to this configuration, the cooling means is not driven when it is not necessary, and the efficiency of the drive of the cooling means is improved, thereby making it possible to save energy and reduce running costs.

[0014] An eighth feature is that the packaging device further has a control unit and a detection means, the detection means detects the state of the drive means, and the control unit controls the drive of the cooling means in accordance with the detection result of the detection means. According to this configuration, the efficiency of driving the cooling means is further improved.

[0015] A ninth feature is that the driving means is a solenoid, the detection means detects a current value of the solenoid, and the control unit controls the driving of the cooling means based on the detected current value of the solenoid. According to this configuration, the efficiency of driving the cooling means can be appropriately improved.

[0016] A packaging device according to an embodiment of the present invention has a film gripping unit, a drive means, a cooling means, a guide unit, a detection unit, and a control unit. The film gripping unit transports and holds the film by repeatedly gripping and unclipping the film. The drive means drives the film gripping unit to perform the gripping operation. The cooling means cools the drive means. The guide unit guides the film to the film gripping unit. The detection unit is provided in the film gripping unit and detects the position of the film or the guide unit. The control unit moves and controls the position of the film gripping unit according to the detection result of the detection unit. The detection unit is provided at a position on the film gripping unit where it can detect the position of the film or the guide unit, and is preferably provided near the tip of the film gripping unit. The packaged item may be, for example, a tray on which food or the like is placed. In detail, this packaging device can easily identify the film setting position, and the position of the guide section that supports and guides the film can be shifted and installed relative to the film gripping section.The guide section has a cutout, and a detection section provided on the film gripping section detects the position of the notch in the guide section, thereby identifying the width size of the guide section and the film, and enabling both side ends of the film to be securely gripped. In other words, this packaging device can handle films of different widths with a simple configuration. Being able to handle films of different widths with a single packaging device means that the device will be rested less often, and the operating rate of the packaging device will improve accordingly. In this case, the heat wear of the driving means of the film gripping unit caused by continuous use of the packaging device becomes an issue. However, with this packaging device, the driving means of the film gripping unit can be appropriately cooled even when the device is continuously used.

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiment of the present invention includes the contents shown in the drawings, but is not limited thereto. In the following description of each drawing, parts common to parts already described will be given the same reference numerals and some duplicated description will be omitted.

[0018] FIG. 1 is a perspective view showing an example of a packaging device 100 according to an embodiment of the present invention. The packaging device 100 packages an item (such as food products) using a film such as a stretch film. In detail, the packaging device 100 has a packaging unit b etc. in its main body 100B, and a display operation unit 39 is provided on the upper front surface of the main body 100B. The display operation unit 39 includes an operation unit consisting of a keyboard, a touch panel etc., and a display unit consisting of a liquid crystal display device etc. The operation unit is for inputting various data and various commands. The display unit displays input data, preset data and various messages based on commands from the CPU. This display operation unit 39 is also known as a console unit.

[0019] A conveying section (conveying device 110) is provided in front of the main body 100B of the packaging device 100. In detail, the conveying device 110 conveys the packaged items w placed on its conveying surface in a conveying direction (from front to rear in the example shown in FIG. 1) into the main body 100B. The packaging device 100 unwinds film from a film roll set in a film roll positioning section provided in the main body section 100B of the packaging device, and delivers the film to a pair of film gripping sections (film feed mechanism) via a film holding section (including a guide section).The film gripping sections clamp both side ends of the film in the width direction while transporting it to packaging section b, and the packaged item (product) transported by the conveying section is pushed up toward the film with both side ends clamped in packaging section b using a lifting device such as an elevator to perform film packaging.

[0020] Fig. 2 is a schematic side view showing an example of the packaging device 100 according to an embodiment of the present invention. Fig. 3 is a schematic front view showing an example of the packaging device 100. Fig. 4 is a perspective view illustrating an example of guide unit 4, film gripping unit 5, and detection unit S of packaging device 100. Fig. 5 is a partially enlarged perspective view illustrating an example of guide unit 4, film gripping unit 5, driving means, cooling means, and detection unit S. FIG. 6 is a conceptual plan view showing an example of guide section 4, film gripping section 5, driving means, and cooling means of packaging device 100. As shown in FIG.

[0021] The packaging device 100 is configured such that the packaged item w conveyed to the main body 100B is conveyed by the conveying device 110 to the elevator 2 serving as a lifting device. A packaging unit b is provided above the elevator 2. In detail, the packaging unit b is provided with a film roll arrangement unit (not shown) and a film holding means (movable holding mechanism unit 401) that holds the leading end of the film F (stretchable film; stretch film) that is unwound from a film roll FR set in the film roll arrangement unit FH. Specifically, as shown in FIG. 3, the film F unwound from the film roll FR is held by the film holding means (movable holding mechanism 401) via a roller R1.

[0022] A cutting unit 9 such as a cutter that cuts film F is provided near the film holding means (movable holding mechanism 401). A guide unit 4 is detachably provided on the film holding means (movable holding mechanism 401). The movable holding mechanism 401 is configured to be movable horizontally together with the guide unit 4 toward the film gripping unit 5. Also provided is a film roll placement section (not shown) and a film holding means (movable holding mechanism section 301) that holds the leading end of the film unwound from the film roll FR3 set in the film roll placement section FH3. The type of film in the film roll FR3 is different from the type of film F in the film roll FR. The film F unwound from the film roll FR3 is held by the film holding means (movable holding mechanism section 301) via roller R3. A guide section 3 is detachably provided on the film holding means (movable holding mechanism section 301). The movable holding mechanism section 301 is configured to be movable horizontally together with the guide section 3 toward the film gripping section 5. Furthermore, the holding and movable mechanism part 401 and the guide part 4, and the holding and movable mechanism part 301 and the guide part 3 are configured to be movable up and down, and the type of film can be switched by a drive mechanism (switching part) that performs the up and down movement.

[0023] More specifically, the holding movable mechanism 401 serving as the film holding means has an upper holding movable mechanism 401T and a lower holding movable mechanism 401B. As described below, the upper holding movable mechanism 401T is provided with a front upper guide 4FT and a rear upper guide 4RT as guide units 4 in a detachable manner. Also, the lower holding movable mechanism 401B is provided with a front lower guide 4FB and a rear lower guide 4RB as guide units 4 in a detachable manner. In addition, the holding movable mechanism part 301 as a film holding means is, in detail, provided with an upper holding movable mechanism part 301T, a lower holding movable mechanism part 301B, and as guide parts 3, a front upper guide part 3FT, a rear upper guide part 3RT, a front lower guide part 3FB, and a rear lower guide part 3RB, and has approximately the same structure as the holding movable mechanism part 401, so description thereof will be omitted.

[0024] A pair of front and rear film gripping sections 5 (front film gripping section 5F, rear film gripping section 5R) consisting of upper and lower conveyor belts 5B (upper conveyor belt 5BT, lower conveyor belt 5BB) that grip and pull out the leading end of the film F held by the film holding means and transport it to the packaging section b are arranged close to the leading end of the film holding means. In addition, solenoids 51 (solenoid 51F, solenoid 51R) are provided in the film gripping sections as driving means for repeatedly gripping and ungripping the film. As shown in FIG. 6, the blower fan 52F that cools the driving means of the front film gripping section 5F is fixed via a bracket connected to an appropriate location of the front film gripping section 5F. On the other hand, the blower fan 52R that cools the driving means of the rear film gripping section 5R is fixed via a bracket connected to an appropriate location of the main body section 100B. The reason for this difference in the arrangement will be described later.

[0025] A cutting unit 9 is disposed between the film holding means and the film gripping unit 5, which cuts the film F, which is clamped and pulled out by the film gripping unit 5, to a predetermined length. The film F is stretched by the film gripping unit 5 of the packaging unit b. The film gripping section 5 (film feed mechanism) is provided on the main body 100B so as to be movable in the width direction of the film F, and the tip (tip on the guide section side) of the film gripping section 5 has an opening / closing mechanism 5C capable of clamping the tip of the film F. This opening / closing mechanism 5C is composed of a moving section 5Ca and a fixed section 5Cb for gripping the film F. The moving section 5Ca is configured to be able to move up and down (or rotate around a rotation axis 5K shown in FIG. 5) toward the film transport surface (above the fixed section 5Cb). In detail, the film F arranged between the moving section 5Ca and the fixed section 5Cb can be clamped by the moving section 5Ca and the fixed section 5Cb. The detection section S is provided on the fixed section 5Cb.

[0026] Each of the movable holding mechanisms is provided with a mechanism called dancer roller RT, RT3 on the film supply path to keep the tension of the film uniform. Each of the movable holding mechanisms moves back and forth to supply the film to the film gripping section 5. The film gripping section 5 also transports the film. Thus, when the movable holding mechanism moves back and forth or when the film gripping section 5 transports the film, a transient load is applied to the film, which may cause the film to break. When such a transient load is applied to the film, the dancer roller RT, RT3 moves in a direction away from the film, absorbing the transient load and reducing the load on the film. Also, when the previous back and forth movement or when the film transport stops, the film may be pulled out a lot due to its inertia, causing sagging in the film. When such sagging occurs, the film may come into contact with other films or the device structure, causing problems in the film transport. In a situation where such sagging may occur, the dancer roller RT, RT3 moves in a direction toward the film, so it applies tension to the film to reduce the sagging.

[0027] In addition, when the movable holding mechanism is moved up or down by the drive mechanism (switching unit), a mechanism is also provided to move the initial position of the dancer roller itself. Specifically, when the movable holding mechanism is raised, each of the dancer rollers rises in conjunction with the rise, and their initial positions become the upper positions. Similarly, when the movable holding mechanism is lowered, each of the dancer rollers descends in conjunction with the descent, and their initial positions become the lower positions. The reason for moving the initial positions of the dancer rollers RT, RT3 up and down in this way is that if the film rolls FH, FH3 do not rise as the movable holding mechanism rises, the distance between the movable holding mechanism and the film roll increases, and the film is pulled out in response to the rise. There is no problem if the film is simply pulled out, but if the movable holding mechanism descends again after being pulled out, the previously pulled-out portion of the film becomes slack, and as mentioned above, it may come into contact with other films or the device structure, causing transport problems. Therefore, when the drive mechanism (switching unit) raises the dancer rollers, they rise to a position higher than their initial position, reducing the amount of film pulled out due to the increased distance between the movable holding mechanism and the film roll. When the amount of film pulled out is reduced, the amount of slack in the film is reduced even when the movable holding mechanism descends, creating a situation in which the aforementioned transport problems are less likely to occur.

[0028] In addition, in the packaging device 100, above the film gripping unit 5, left and right folding plates 6, a rear folding plate 7, a pusher (not shown), and the like are disposed.

[0029] In the packaging device 100, the elevator 2 raises the packaged item w against the film F stretched across the packaging section b, and the left, right and rear ends of the stretched film F are folded against the bottom of the packaged item w using the left and right folding plates 6 and the rear folding plate.Then, while pushing the packaged item w horizontally with a pusher, the ends of the film F are folded with a front folding roller (not shown), and the film-packaged product is pushed toward the rear of the main body section 100B with the pusher.

[0030] 3, the packaging device 100 has an upper guide section 4 (also referred to as an upper guide section 4) and a lower guide section (referred to as a lower guide section 3). The lower guide section 3 has substantially the same configuration as the upper guide section 4, and therefore a detailed description thereof will be omitted. As described above, the upper guide portion 4 and the lower guide portion 3 are configured to be movable up and down by the switching portion, and are configured to be switchable for use. An upper guide film roll placement unit FH and a lower guide film roll placement unit FH3 are provided corresponding to the upper guide unit 4 and the lower guide unit 3, respectively, and hold film rolls FR and FR3. That is, the packaging device 100 shown in Fig. 3 is configured to be able to switch between two films, thereby shortening the time required for film replacement and increasing packaging capacity per unit time. Also, for example, by setting a large film in one film roll placement section and a small film in the other film roll placement section, switching can be done by moving the elevator 2 up and down, without the need for time to change films as in the past.

[0031] 3, the upper guide unit 4 is at the same height as the film gripping unit 5, and packaging processing is performed using the film sent out from the upper guide unit 4. At this time, the lower guide unit 3 is in a state where it is lower than the upper guide unit 4. However, even if the two guide units 4, 3 are moved up and down by the elevator 2, the positions of the two film roll placement units FH, FH3 do not change.

[0032] When lower guide portion 3 is used, upper guide portion 4 rises to a position higher than the position of film gripping portion 5 , and the height position of lower guide portion 3 becomes the same height position as that of film gripping portion 5 .

[0033] The packaging device 100 is provided with a printing unit that issues labels and a labeling unit that applies labels. The packaging device 100 does not necessarily have to include either or both of the printing unit and the labeling unit.

[0034] In the example shown in FIG. 7, when using a film F having a width of, for example, 60 cm, the film is controlled so that a portion a certain distance inward from the end face of the film (5 cm in the example shown) is gripped by the tip of the film gripping portion 5 and conveyed. The opening F1 is used when clamping the inner 5 cm of the 60 cm wide film F. Therefore, when the use of the 60 cm wide film F is specified, the packaging device is configured to identify the opening F1 based on a condition table stored in the memory unit of the packaging device, and move the film gripping unit 5 toward the opening F1.

[0035] [Table 1]

[0036] [Table 2]

[0037] Table 1 shows an example of an information table in which the opening positions for the upper guide portion are stored, and Table 2 shows an example of an information table in which the opening positions for the lower guide portion are stored. Since each guide portion is freely adjustable, the position of the opening can be re-stored each time an adjustment is made. The film names shown in Tables 1 and 2 are numbers assigned to the apertures. In detail, the aperture number and the width of the film used at that position may be displayed together, such as "No. 1 (600 mm film)," or simply "No. 1" and the aperture number may be displayed. This can be changed as appropriate according to the user.

[0038] The opening positions (count number information of the guide portion stored in the storage portion) shown in Tables 1 and 2 will be described. F1 to F7, etc., are information regarding the number of guide parts detected by the film gripping part's position detection sensor, and are information that the control part uses to count the detection results and determine the position at which it is located. These F1 to F7, etc., are stored in a 1:1 relationship with the film name, and when No. 1 is selected as the film name, the number counted during control will be "1." When the film gripping part has counted 1 (F1), it is determined that film No. 1 has been reached.

[0039] The opening positions (distance information from the initial position stored in the storage unit) shown in Tables 1 and 2 will be described below. The film gripping part has an initial value of 0, and the distance traveled from there (mm, cm, etc.) is stored in the memory in association with the film name and number information. After the guide part is adjusted, control is performed to measure this distance. It starts moving from the initial position and moves until the guide part is first detected (until the count becomes 1 = until F1), and the distance information when it is detected is stored in the information table as distance information corresponding to film name No. 1. Since the guide parts have openings at equal intervals (for example, 50 mm), if F1 can be counted, the remaining No. 2 to 7 can be stored as information that adds 50 mm each. It is also possible to count all guide parts without stopping at 1 count (F1), and calculate the distance each time by counting 2 counts (F2). In other words, the distance between the position of F1 and the initial position can be stored in the memory unit in advance. This distance information can be used when switching between the upper guide portion and the lower guide portion, and can be calculated based on the pulse signal and the encoder signal used to drive the motor. In other words, the packaging device according to an embodiment of the present invention is equipped with a memory means (memory unit) that stores distance information based on the detected position of the guide unit, and this memory means stores the distance information between the guide unit and the second guide unit.

[0040] For example, if there is a problem with film F slipping out of the transport section when the film is clamped and transported by film gripping section 5, it may be possible to grip it further inward than the current 5 cm (for example, at the 7 cm position). For example, opening F2 can be used, but if the distance between openings F1 and F2 is specified as 5 cm, and the opening position of 600 mm is reset to F2 in the above condition table (see Table 1), the control will result in clamping at a 10 cm position, but because this is too far inward, there will be excess edge when the film is clamped and transported, and the excess portion may get caught in other mechanisms. The packaging device is configured so that the positions of the guide sections 4, 3 can be finely adjusted, specifically so that they can be set with a shift of, for example, 5 cm or less in the width direction of the film. Additionally, fine adjustments are required for films of special widths that do not fit into these 5cm increments. The position of the guide portion 4 can be finely adjusted, but in order to perform this fine adjustment, the following new problem must be solved.

[0041] As shown in FIGS. 4, 5 and 6, the packaging device according to the embodiment of the present invention has a detection unit S (sensor) at the tip of the film gripping unit 5.

[0042] As a comparative example, as shown in Figure 8, position detection sensors 2S to 4S such as optical sensors are provided on one of the movement axes of front film gripping part 5F, the number of positions at which front film gripping part 5F is desired to stop (comparative example). Front film gripping portion 5F knew its own position according to the ON / OFF state of the sensor. Therefore, in the case of the mechanism of the comparative example, when the position of guide part 4 is adjusted (shifted in the width direction of the film), the positions of position detection sensors 1S to 4S must also be shifted by the same distance. Also, it is necessary to prepare position detection sensors for the number of positions where the film gripping parts are desired to stop.

[0043] The mechanism of the packaging device of the present invention does not have any of the position detection sensors 1S-4S of the comparative example, and the position of the front film holding portion 5F is determined solely by the detection results of the detection unit S (sensor) at the tip of the front film holding portion 5F and the guide unit 4, thereby significantly improving work efficiency. Furthermore, because guide portion 4 is in contact with film F, when the worker intuitively desires to "grasp this part of the film," he or she can simply shift the position of guide portion 4, and the front film gripping portion 5F can follow suit, enabling intuitive operation. In the mechanism of the comparative example, when the guide part 4 is intuitively shifted, it is necessary to shift 1S to 4S, which are separated from each other on the same straight line, by the same distance as the guide part 4 is moved, which is non-intuitive and requires complicated work.

[0044] Next, an example of the operation of the packaging device according to the embodiment of the present invention will be described with reference to FIGS. The initial position sensors 81, 82 are sensors for detecting when the front film gripping part 5F is located at the forefront (front side) and are, for example, light-emitting parts, light-receiving parts, etc. When the initial position sensors 81, 82 are in the ON state, the control part determines that the front film gripping part 5F is in the initial position. Furthermore, in the initial position, the detection part S is configured not to detect the guide part 4. When front film gripping portion 5F moves from this initial position towards rear film gripping portion 5R, the initial position sensor turns OFF and it is determined that front film gripping portion 5F is not in the initial position. While front film gripping portion 5F is moving towards rear film gripping portion 5R, detection unit S detects guide portion 4. By counting the number of times this detection (ON), the control unit can determine the current position of front film gripping portion 5F. In other words, the control unit controls the movement of the position of the front film gripping portion 5F based on the number of times that detection unit S detects the guide portion. Therefore, no matter what position guide portion 4 is adjusted to, the stopping position of front film gripping portion 5F can be determined simply based on the above count. Specifically, after adjusting the upper and lower guide sections to the desired position, the film width to be used for the upper and lower guide sections can be set by selecting the opening of the upper and lower guide sections using the operation section of the packaging device. Incidentally, a detector S may also be provided in rear film gripping portion 5R, making it possible to identify the current position of rear film gripping portion 5R.

[0045] FIG. 9 is a diagram showing an example of a setting screen for determining the opening position information table. The setting screen shown in Fig. 9 is a screen for setting various pieces of information about the film to be set in the packaging device in advance in the packaging device. On this setting screen, the "Film Settings (Upper Guide 4)" tab is selected, and the screen is for setting information about the film to be set in the upper guide 4. In the "film position" area 391, the name of the film to be used can be set. This corresponds to the "film name" in Table 1. In this film name area ("film position" area 391), the number of apertures (F1 to F7) provided in the upper guide section 4 can be selected. If a new guide section with a different number of apertures is provided, the selection range can be changed accordingly. By selecting and deciding this film name, the information in the aperture position table in Table 1 can be decided. In the example shown in Figure 9, "No. 3 (500 mm)" is selected in the "Film position" area 391, so when performing packaging processing using the upper guide unit 4, the film gripping unit is controlled to move until it detects a signal of F3 (= 3 counts), and then the film is clamped and transported. In addition, in response to the selection of "No. 3 (500 mm)", the packaging device waits for a signal from F3 while moving the film gripping part in order to determine how far away F3 is from the initial position. When the movement distance when F3 is detected is calculated, the distance is written in the opening position information table of Table 1. In this way, the information regarding the distance in the opening position information table needs to be adjusted every time the guide portion is adjusted.

[0046] The "film setting" area 392 can be set to select the specific film type to be set. While there are many types of film that can be set, each film has different characteristics, so in order to achieve a high-quality and efficient packaging, it is necessary to perform packaging control according to the characteristics of the film. Therefore, the packaging device stores in advance packaging conditions according to several parameters such as the material, hardness, and stretchability of the film. Therefore, the packaging device can determine one of the optimal packaging controls according to the type of film selected in the "film setting" area 392. The "film setting" area 392 is also configured to allow setting and storing information regarding the total length of the film roll to be set. In the "Eyemark" area 393, you can set whether the film you are setting has a mark that can be detected by an optical sensor. Because film is transparent, it can be difficult to detect. For this reason, some films are equipped with a mark called an eyemark that can be detected by an optical sensor. The packaging device can determine packaging control depending on the presence or absence of this eyemark. The above is the setting related to the film in the upper guide section 4. The same is true for the lower guide section 3, so a description thereof will be omitted.

[0047] In detail, for example, when the film width is relatively long as shown in Fig. 10(a), the front upper guide portion 4FT and the front lower guide portion 4FB of the guide portion 4 are arranged as shown. For example, when the film width is relatively short as shown in Fig. 10(c), the front upper guide portion 4FT and the front lower guide portion 4FB of the guide portion 4 can be arranged as shown. The front upper guide portion 4FT and the front lower guide portion 4FB of the guide portion 4 are arranged so that the side edge of the film is positioned in the notched opening 4ta of the guide portion 4. In the example shown in FIG. 10, the rear upper guide portion 4RT and the rear lower guide portion 4RB of the guide portion 4 are fixed to the movable holding mechanism.

[0048] 10(a), when the film width is relatively long, the front film gripping portion 5F moves in the width direction of the film (front-rear direction) when detecting the position of the guide portion 4, and the intensity of light received by the optical sensor of detection portion S (such as an optical sensor or imaging portion) provided at or near the tip of the film gripping portion 5 changes according to the position of the opening 4ta of the guide portion 4, as shown in Fig. 10(b). In other words, the positions of the front upper guide portion 4FT and front lower guide portion 4FB of the guide portion 4 can be detected with high accuracy based on the strength of the light intensity detected by the optical sensor of detection portion S.

[0049] 10(c), when the film width is relatively short, the front film gripping part 5F similarly moves in the width direction of the film (front-rear direction), and the intensity of light received by the optical sensor, as shown in Fig. 10(d), by detection part S (such as an optical sensor) provided at or near the tip of film gripping part 5, changes according to the position of opening 4ta of guide part 4. In other words, based on the pattern of strong and weak light intensity detected by the optical sensor of detection part S, it is possible to detect with high accuracy that the positions of front upper guide part 4FT and front lower guide part 4FB of guide part 4 have shifted rearward by a specified distance.

[0050] In order to determine the position of the opening of guide portion 4 with high precision, the position of the opening of the guide portion may be determined with high precision while film gripping portion 5 is moved slightly at small intervals in the film width direction.

[0051] In the embodiment described above, the position of the guide portion 4 is determined with high precision based on the position of the notched opening 4ta of the guide portion 4 and the positional relationship between the film gripping portion 5 and the film, and the movement of the film gripping portion 5 along the film width direction is controlled with high precision based on the determined position. However, the present invention is not limited to this embodiment. For example, a positioning marker (e.g., a hole of a specified shape or a printed mark) may be provided at a specified position on the guide section 4, the marker may be imaged by an imaging section such as a camera provided in the main body of the packaging device, the positioning marker may be identified from the image obtained by imaging, and the position of the guide section 4 may be identified based on the position information of the marker.

[0052] As described above, the embodiment of the present invention is configured so that the front film gripping portion 5F can move in the width direction (front-rear direction) of the film. This allows the packaging device to handle films of different widths. Compared to a case where the film width that can be handled is fixed and a packaging device is prepared for each type of film width to be handled, the device is less likely to stop operating and the packaging device is more likely to be used continuously. In addition, the embodiment of the present invention is configured so that the film rolls FR and FR3 can be switched between the film roll arrangement portion FH for the upper guide portion and the film roll arrangement portion FH3 for the lower guide portion, so that the downtime of the device due to film replacement can be eliminated and the device can be used efficiently. However, this also means that solenoid 51, which causes film gripping portion 5 to perform gripping and unclipping operations, is used continuously without rest, exposing the problem of heat wear of solenoid 51 to greater prominence. To appropriately address this problem, an embodiment of the present invention provides a blower fan 52 near solenoid 51 (solenoid actuator), which is the means for driving film gripping portion 5. As shown in Figure 5, the frame that holds solenoid 51 has an opening on the side, and is positioned so that air is blown by blower fan 52 toward this opening.

[0053] As shown in Fig. 6, the blower fan 52F, which cools the solenoid 51F, which is the drive means for the front film gripping part 5F, is fixed via a bracket connected to an appropriate location on the front film gripping part 5F. On the other hand, the blower fan 52R, which cools the solenoid 51R, which is the drive means for the rear film gripping part 5R, is fixed via a bracket connected to an appropriate location on the main body 100B. As can be understood from the above explanation, the front film gripping part 5F moves in the width direction of the film (front-rear direction), so the blower fan 52F needs to follow this movement, and is fixed to a bracket connected to the front film gripping part 5F. In reality, the rear film gripping part 5R may also move slightly during the initialization operation, etc., but since it does not move significantly across the width direction of the film (front-rear direction) like the front film gripping part 5F, there is no problem in fixing the blower fan 52R based on the device main body as long as it is positioned approximately near the rear film gripping part 5R. Also, the rear film gripping portion 5R may be configured to be actively moved. In such a configuration, openings F8, F9 are also provided on the rear side so that they can be used for position control, as shown in Fig. 7. For example, in the case of the shortest film, if the front film gripping portion 5F and the rear film gripping portion 5R are moved to positions corresponding to F7 and F8, the packaging operation by the packaging mechanism will be performed in a position close to the center of the entire device, making it possible to perform stable operations.

[0054] 5, blower fan 52 is disposed below film F held by the film holding parts and disposed so as to blow air diagonally downward. The reason for this arrangement is to reduce the disturbance of film F caused by the blown air, thereby enabling film F to be transported appropriately.

[0055] The blower fan 52 does not have to be operated all the time, but only when necessary. In other words, it is not necessary to operate the blower fan 52 until the solenoid 51 is not very hot. This control may be based on a relationship obtained from experience, for example, control according to the number of times the solenoid 51 is driven, or feedforward control corresponding to the driving state of the solenoid 51 may be used to perform more appropriate control. In this case, the information on the total length of the film roll set and stored in the "film setting" area 392 described above can be used. Furthermore, feedback control may be performed by detecting the temperature of the solenoid 51. As a specific detection method, the temperature can be detected using a thermocouple, or the current value of the solenoid 51 can be detected, but detecting the current value of the solenoid 51 is simple in terms of circuitry and is also advantageous in terms of control processing. The coil resistance of the solenoid increases due to a rise in temperature caused by current flow and an increase in the ambient temperature, and the magnetomotive force of the solenoid decreases. However, by simply adding a detection system to the drive circuit, monitoring, drive, and stop control are possible. The blower fan 52 is operated when the solenoid is excessively driven and the current ratio to the normally expected current exceeds an upper threshold. The blower fan 52 is also operated when the current ratio to the normally expected current falls below a lower threshold due to an unexpected event such as a short circuit. At that time, the blower fan may be configured to be automatically operated, or as shown in FIG. 11, the status may be displayed on a display panel and the blower fan may be operated when the operator presses a "confirmation button." In the latter case, the operator can always grasp the status of the device, including operational abnormalities, and it is easy to respond to various errors. In this way, the blower fan is configured to operate at the appropriate time, so that the replacement time due to wear and tear of the blower fan 52 can be extended.

[0056] 12 is a diagram showing an example of an electrical functional block of the packaging device 100 according to an embodiment of the present invention. In detail, the packaging device 100 has a weighing label printer control unit G, a packaging mechanism control unit I, and the like.

[0057] The weighing label printer control unit G mainly controls the weighing label printer-related components, and is controlled by the CPU 31. The packaging mechanism control unit I mainly controls the mechanisms of the packaging device, and is controlled by the control unit 61 (CPU). The control unit 61 (control means) may also cooperate with each component of the weighing label printer control unit G to control each component.

[0058] The weighing label printer control unit G will now be described. The CPU 31 is connected to a memory unit 35 such as ROM and RAM, a display operation unit 39, a weighing unit 50, a communication interface circuit (INF) 46, a printing unit 40 (label issuing unit), and a label application unit 41 via a communication line (bus, etc.).

[0059] The storage unit 35 includes a ROM, a RAM, etc., and stores various control programs executed by the CPU 31, etc. The storage unit 35 has areas for registers, flags, etc. used when the CPU 31 executes the control program, a preset data area in which various data are stored in advance for each product (each packaged item w), etc. In the preset data area, corresponding to the product number given to the product included in the packaged item w, data for price calculation and label printing, such as product name (product name), unit price, tare weight, etc., and data for label attachment, such as "label orientation", are stored in advance.

[0060] The display operation unit 39 includes an operation unit consisting of a keyboard and a touch panel, etc., and a display unit consisting of a liquid crystal display device, etc. The operation unit is for inputting various data and various commands. The display unit displays input data, preset data, and various messages based on commands from the CPU 31.

[0061] The weighing unit 50 is provided, for example, in a conveying device, weighs the packaged items placed on the conveying device, and supplies a weighing signal indicating the weighing result to the CPU 31. The communication interface circuit (INF) 46 is a circuit for communicating various data, commands, and the like between the weighing label printer control unit G and the packaging mechanism control unit I.

[0062] The printing unit 40 is a weighing label printer and is equipped with a print head (such as a thermal head) as printing means for the label, a platen roller, a label transport unit, a transport drive motor, etc., and under the control of the CPU 31, prints product data on the label, such as the product name, price, unit price, validity date, barcode, etc., and issues the printed label from an issuing port.

[0063] Under the control of CPU 31, label application unit 41 uses a suction unit to suck up the label printed and issued by printing unit 40, and applies the label to the film-packaged product.

[0064] Next, the control unit 61 (CPU) of the packaging mechanism control unit I of the packaging device 100 will be described. The control unit 61 is connected to a communication interface circuit (INF) 62, a storage unit 60 such as a ROM or RAM, an operation unit 63, a communication unit 64, a mechanism drive unit 65, and the like via communication lines (such as a bus). The communication interface circuit (INF) 62 is a circuit for communicating with the weighing label printer control unit G for various data and commands.

[0065] The storage unit 60 stores the control program executed by the control unit 61. The storage unit 60 also stores various tables and the like for determining control data based on product shape data (length, width, height) in addition to various register and flag areas used when the control unit 61 executes the control program. The storage unit 60 may be a storage device such as an HDD or SSD.

[0066] Under the control of the control unit 61, the communication unit 64 performs data communication with a management server (such as a management computer) via a wired or wireless communication path (such as a network).

[0067] The control unit 61 functions as a control means for controlling the packaging operation and the like in the packaging device 100. The control unit 61 executes a control program to realize the functions according to the present invention.

[0068] The mechanism drive unit 65 is electrically connected to the conveying unit (conveying device 110), lifting devices such as the elevator 2, the packaging unit b, the drive means 51 for the film gripping unit 5, the cooling means 52, the detection unit S, etc. Each configuration has been described above, so a description thereof will be omitted.

[0069] Next, an example of the operation of the packaging device 100 will be described with reference to FIG. In step ST301, for example, an operator operates the display operation unit 39 such as a touch panel, a keyboard, an operation switch, etc. to set the packaged item and the type of film (film width, etc.). In detail, the control unit 61 sets the packaged item and the type of film based on a signal corresponding to the operation from the display operation unit 39. The control unit 61 stores the setting information in the memory unit 60, the memory unit 35, etc. In addition, the control unit 61 reads out detailed information corresponding to the setting information such as the name and type of film, such as the width, material, length, and date of manufacture of the film, from a database stored in the storage unit 60 or the like. In addition, when a signal for setting the type of packaged item or film is received from a management device (management computer) etc. via the communication unit 64, the control unit 61 may set the type of packaged item or film based on the signal.

[0070] In step ST302, the guide unit 4 is appropriately placed at a specified position according to the type of film F of the film roll FR placed by the film roll placement unit. In detail, for example, the operator places the guide unit 4 at a position according to the type (film width) of the film F being unwound from the film roll FR. Specifically, the guide part 4 is positioned so that the end of the film F in the width direction is positioned at a notched opening 4ta of the guide part 4. An operator or the like may place the guide part 4 at the above position, or a moving mechanism (not shown) provided in the packaging device may place the guide part 4 at the above position.

[0071] In step ST303, control unit 61 detects the positions of guide unit 4 and film F (such as the side end of film F) based on the detection result of detection unit S. In detail, control unit 61 detects with high accuracy the position of notch-shaped opening 4ta formed at the end of guide unit 4 and the side end of film F using detection unit S provided on film gripping unit 5, which moves in the width direction of the film (front-to-back direction). Note that when front film gripping unit 5F moves in the width direction of the film (front-to-back direction), moving unit 5Ca of opening / closing mechanism 5C provided near the tip of front film gripping unit 5F is in a raised state.

[0072] In step ST304, it is determined whether the type of film F that has been set corresponds to the position of the guide section 4 or the film F. If they correspond, the process proceeds to step ST305. If they do not correspond, the process proceeds to step ST302, and the position of the guide section 4 is adjusted or the position of the guide section 4 is detected again.

[0073] In step ST305, control unit 61 controls the movement of the position of film gripping unit 5 in accordance with the detection result of detection unit S, and performs normal packaging processing.

[0074] In step ST306, the control unit 61 judges whether or not it is necessary to operate the cooling means 52. Specifically, when the current value of the solenoid 51 exceeds a threshold value, the cooling means is operated, and when the current value is equal to or less than the threshold value, the cooling means is not operated.

[0075] In step ST307, the control unit 61 determines, for example, whether packaging is complete by completing the packaging process for the set number of packaged items, or whether the end has been instructed by operating an end button or the like, and if it is complete, ends the packaging process for the packaged items, or if it is not complete, proceeds to processing of step ST308.

[0076] In step ST308, the control unit 61 determines whether or not to change the type of film F, for example, based on a signal input from the display operation unit 39, and if not, proceeds to processing of step ST305, and if changed, proceeds to processing of step ST302.

[0077] The operation of the packaging device 100 is not limited to the above-described embodiment. For example, the packaging device 100 may be configured such that a plurality of types of film rolls FR are set in the film roll arrangement unit FH, and the film rolls FR are automatically replaced by operating an automatic replacement device according to the size of the product to be packaged. In the packaging device 100, data (type) of the film roll FR is set in advance by inputting, etc. In the packaging device 100, only one film roll is set in the film roll arrangement section FH, and the position of the film gripping section 5 may be automatically adjusted by detecting the position of the guide section 4, which is a different position depending on the width of the film F of the film roll FR set in this film roll arrangement section FH. In other words, packaging device 100 can change the initial position of film gripping portion 5 in accordance with the film roll replacement operation. In addition, in a stretch wrapping device in which multiple types of film rolls are set in the film roll placement section FH and the film to be used is changed manually, the initial position of the film gripping section can be automatically changed depending on the film to be used.

[0078] Since the width of the film held in the film holding section, i.e., the type of film being used, is directly detected, the film width can be detected without any problems even if multiple film rolls are set in the film roll placement section FH, and the initial position of the film gripping section is automatically set by the control section 61 in accordance with the detection result.

[0079] <Control when switching between upper and lower guides> The film gripping part detects the presence or absence of the guide part and counts it to grasp the movement position. Therefore, in order to count the guide part, the film gripping part must be returned to the 0 position (= initial position) before counting. The packaging device according to the embodiment of the present invention has at least two guide units, so that it can be used while switching between them. In other words, in order to resume packaging control by switching to the lower guide unit 3 in succession after performing packaging control using the upper guide unit 4, it is necessary to perform control such that when switching from the upper guide unit 4 to the lower guide unit 3, the film gripping unit is returned to the initial position, and from there, the film information set in the lower guide unit 3 is referred to as the count number stored in the opening position information table, and the film gripping unit is moved until the count number is reached. If the film gripping unit is moved to the initial position and counted from there every time the upper guide unit and the lower guide unit are switched in this way, a lot of time is required for this series of movements, and it cannot be said to be efficient. Therefore, in the packaging device according to the embodiment of the present invention, the distance information is stored in association with the count number information in the opening position information table. As a result, for example, if No. 7 (= F7) is selected in the opening position information table for the upper guide unit 4 and the actual distance is 400 mm, and No. 7 (= F7) is selected in the opening position information table for the lower guide unit 3 and the actual distance is 500 mm, if the difference in the actual distance (= 500 - 400 = 100 mm) is calculated in advance, the moving distance after switching the guide unit will be only 100 mm. Since there is no need to count back to the initial position, the time required for switching can be significantly reduced. That is, the packaging device according to the embodiment of the present invention has a second guide unit (lower guide unit 3) for guiding a film different from the film guided by the guide unit (upper guide unit 4). The packaging device also has a switching unit that switches between the guide unit and the second guide unit so that the film gripping unit can use either the guide unit (upper guide unit 4) or the second guide unit (lower guide unit 3). In addition, the control unit of the packaging device according to an embodiment of the present invention calculates a difference from the respective distance information between the guide unit (upper guide unit 4) and the second guide unit (lower guide unit 3) stored in the memory means, and controls the movement of the film holding unit based on that difference.

[0080] As described above, the packaging device 100 according to an embodiment of the present invention packages an item to be packaged in film. This packaging device 100 has a film holding unit 5, a guide unit 4, a detection unit S, a control unit 61, etc. The guide unit 4 guides the film F to the film holding unit 5. The detection unit S is provided in the film holding unit 5, and detects the position of the film F or the guide unit 4. The film holding unit 5 transports and holds the film F. It should be noted that detection unit S need only be provided at a position on film gripping unit 5 where the position of film F or guide unit 4 can be detected, and is preferably provided at or near the tip of film gripping unit 5. In the initial setting mode, the detection unit S detects the position of the film F or the guide unit 4. The detection unit S has, for example, a light detection unit (light sensor) and a light emitting unit (LED, etc.). Note that the detection unit S may detect the position of the film F or the guide unit 4 by capturing an image of the film F or the guide unit 4 with an imaging device such as a camera. The control unit 61 controls the movement of the position of the film gripping unit 5 in accordance with the detection result of the detection unit S.

[0081] In the normal packaging mode, the packaging device 100 unwinds film F from a film roll set in a film roll placement section FH provided in the main body section 100B of the packaging device, and delivers the film F to a pair of film gripping sections 5 (film feed mechanism) via a guide section 4 of the film holding section. These film gripping sections 5 clamp both side ends of the film in the width direction and transport it to the packaging section b, and the packaged item w (product) transported by the conveying section is pushed up toward the film with both side ends clamped by a lifting device such as an elevator in the packaging section b, thereby performing film packaging. That is, with a simple configuration, the guide unit 4 can be shifted and set according to different types of film, specifically, the width of the film to be set in the packaging device (the width of the long film unwound from the film roll), so that the film F can be reliably held according to the type of film F and guided to the film gripping unit 5. In other words, it is possible to provide a packaging device 100 that is compatible with films of different types and widths.

[0082] Furthermore, the tip of the film gripping unit 5 of the packaging device 100 according to the embodiment of the present invention has an opening and closing mechanism 5C. This opening and closing mechanism 5C is made up of a moving unit 5Ca and a fixed unit 5Cb for gripping the film F. The detection unit S is provided on the fixed unit 5Cb. The moving part 5Ca is configured to be movable (or rotatable) up and down toward the film transport surface (above the fixed part 5Cb). In detail, the film F arranged between the moving part 5Ca and the fixed part 5Cb is configured to be clamped by the moving part 5Ca and the fixed part 5Cb. By providing detection unit S on fixed unit 5Cb, the presence or absence of film F or guide unit 4 can be detected regardless of the position of moving unit 5Ca. For example, if the detection unit is provided on the moving part 5Ca side, when the moving part 5Ca is raised, it will be separated from the film F and the guide part 4, resulting in reduced sensing accuracy. Also, for example, when the moving part 5Ca is closed (lowered), even if one tries to move the film holding part 5 in the forward / backward direction (the forward / backward direction shown in Figure 4), the moving part 5Ca will come into contact with the film F and the guide part 4 and will not be able to move. In other words, since the detection unit S is provided on the fixed portion 5Cb of the film holding portion 5, the film F and the guide portion 4 (comb-tooth shape) can be detected by the detection unit S with a simple structure while the film holding portion 5 is moved in the forward / backward direction (the forward / backward direction shown in Figure 4).

[0083] Furthermore, the guide unit 4 of the packaging device 100 according to the embodiment of the present invention has a notched opening 4ta that exposes the leading end of the held film F, and the guide unit 4 is detachably provided to a holding movable mechanism unit 401 (401T, 401B) that is horizontally movably provided on the main body 100B of the packaging device according to the size of the film F. The film gripping unit 5 (film feed mechanism) is disposed movably in the width direction of the film F, and has an opening / closing mechanism that can clamp the leading end of the film F through the opening 4ta of the guide unit 4. The detection unit S is provided at or near the tip of the film gripping unit 5 so as to be movable together with the film gripping unit 5. The control unit 61 aligns the film gripping unit 5 in accordance with the detection result by the detection unit S. In detail, a film roll is rotatably arranged in the film roll arrangement section FH. The film roll arrangement section FH is configured to be able to arrange a film of a type and width corresponding to the packaged item. For example, the guide section 4 has a plurality of openings 4ta arranged at regular intervals at the end on the film gripping section side, and is configured to be able to accommodate films of different specified widths. For example, when a film roll FR having a film width different from the film width corresponding to each of the multiple openings 4ta of the guide section 4 is placed in the film roll placement section FH, the film gripping section 5 cannot properly grip both side ends of the film F as is. Therefore, by shifting the guide section 4 in the film width direction so that the openings 4ta of the guide section 4 are aligned with positions corresponding to the width of the film F of the film roll FR set in the film gripping section 5, it becomes possible for the film gripping section 5 to properly grip both side ends of the film F. Then, the control unit 61 controls the movement of the film gripping unit 5 according to the detection result of the position of the opening 4ta of the guide unit 4 by the detection unit S. In detail, the control unit 61 determines the position of the guide unit 4 and the width of the film with high accuracy based on the position of the opening 4ta of the guide unit 4, and is therefore capable of handling both films of widely distributed types and films of special widths, and can neatly package the packaged item with film.

[0084] Even if the film width is the same as the conventional product, there are cases where it is necessary to adjust the gripping part of the film. By adjusting the gripping part, the film tension of the finished package can be increased or decreased. Furthermore, in the present invention, simply by adjusting the position of the guide unit 4 (by shifting it from the specified position), the film gripping unit 5 automatically moves according to the adjustment (the amount of deviation from the specified position), so there is no need for the operator to change any settings. In this way, an intuitive adjustment can be made while visually checking the positional relationship between the film and the guide unit 4, and by eliminating the need to adjust the film gripping unit 5, a packaging device that has not been seen in the past can be provided. In detail, by simply sensing and counting the number of comb teeth of the guide unit, for example, in a film in which comb tooth position 3 is originally set, the condition of "comb tooth position 3" remains the same even if the position of the guide unit 4 is shifted 1 cm or 25 cm forward, and the film gripping unit can be moved to the adjusted position with high precision.

[0085] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention includes design changes within the scope of the present invention. For example, when the blower fan is subject to restrictions on placement, a heat pipe can be used to connect the solenoid and the blower fan, and other cooling means such as a Peltier element can be used as a cooling means instead of using a blower fan. In addition, it has been explained that the problem of heat dissipation of the solenoid is prominent in a packaging device with a moving film gripping part and a high operating rate, but even in a packaging device in which the film gripping part does not move because it is used only for a single-width film as a required specification, the problem of heat dissipation of the solenoid is not absent, so there is sufficient significance in applying the present invention. On the other hand, in a packaging device in which the film gripping part does not move, it is sufficient to fix both of the two cooling means to a bracket connected to the main body. Furthermore, in the embodiment of the present invention, one solenoid is provided for each of the multiple film gripping parts, but multiple solenoids may be provided for each gripping part for fail-safe or backup purposes. As mentioned above, when the temperature of a solenoid rises due to current flow and when the ambient temperature rises, the coil resistance increases, the current decreases, the magnetomotive force of the solenoid decreases, and the gripping force weakens. However, by simultaneously driving multiple solenoids, the weakened gripping force can be compensated for. Alternatively, by more actively driving multiple solenoids alternately, it is possible to make the solenoid less likely to heat up. In such a case, if a blower fan is also used, the lifespan of the solenoid and the blower fan can be extended in total.

[0086] The embodiments shown in the above figures can be combined with each other as long as there is no particular contradiction or problem in the purpose, configuration, etc. Furthermore, the contents of each figure can be independent embodiments, and the embodiment of the present invention is not limited to one embodiment obtained by combining each figure. [Explanation of symbols]

[0087] 4…Information department 5...Film gripping part 51...Drive means (solenoid) 52...Cooling means (blower fan) 60…Storage unit (RAM, ROM, etc.) 61...Control unit (CPU) 100...Packaging equipment 100B…Main body 401...Holding movable mechanism section F…Film S: Detection unit (optical sensor, imaging unit, etc.)

Claims

[Claim 1] A wrapping means for wrapping an object by folding a film; a film gripping section that repeatedly grips and releases the film when feeding the wound roll film; A driving means for driving the film gripping portion; a cooling means for cooling the driving means, The film gripping portion has a plurality of film gripping portions, At least one of the plurality of film gripping parts is a film gripping part that is movable in a width direction of the film by a first predetermined width, The cooling means is provided for the driving means that drives the movable film gripping portion and is configured to be movable together with the film gripping portion. A packaging device comprising:

Images