JP4764577B2 - Packaging equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging device, and more particularly to a packaging device having a mechanism for pressing an object to be packaged against a tensioned film.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an apparatus for packaging an object to be packaged such as fresh food stored in a tray using a foamed polystyrene with a stretch film is known as a stretch packaging apparatus. In this stretch wrapping device, a stretch film having a predetermined width is cut into a predetermined length according to the size of the tray, and both side edges in the width direction of the film are held by a pair of feeders composed of upper and lower belts and the like. While the film is conveyed to the packaging station, the packaging is performed at the packaging station.
[0003]
In the packaging station, an object to be packaged stored in the tray is pushed up with respect to the conveyed film, and the peripheral edge of the film is folded to the bottom surface side of the tray with the object to be packaged in close contact with the film. As a result, the objects to be packaged and the tray are wrapped in the stretch film, and then the film on the bottom surface of the tray is heat-sealed to complete the packaging.
[0004]
With regard to such a packaging apparatus, the applicant of the present application has made the invention disclosed in Japanese Patent Laid-Open No. 2001-106202. This invention has been made in order to eliminate the time and labor required for the operator to widen the leading end of the film drawn out from the film roll and set it in the apparatus, that is, the trouble in setting the film. In the packaging device 1 disclosed in the above publication, the control device 9 performs control to increase the distance between the first and second feeder units 61 and 62 while conveying the film F during the initial film setting operation. For this reason, even if the operator does not set the film F drawn out from the film roll R with the leading edge of the film F expanded, that is, even if the film F is set with the wrinkle on the leading edge of the film F, the film F is Expanded automatically by control. Thereby, in the work at the time of initial film setting, the labor of the operator to widen the leading edge of the film F, which has been conventionally performed, can be saved.
[0005]
[Problems to be solved by the invention]
In the packaging apparatus 1 of the above publication, an operation of loading the film F while automatically spreading the film F is performed by pressing the film loading button. The film loading button is normally pressed after opening the film exchange door 1b, mounting the film roll R on the roll bar 4a, and setting the film leading end on the film insertion plate unit 53.
[0006]
However, the operator may press the film loading button again when it is visually recognized that the film F is not sufficiently tensioned after the initial film setting operation has been performed. Further, depending on the arrangement of the operation switches and the operation buttons, it is conceivable that the film loading button is pushed by mistake as a film feed button (switch). In such a case, since the film F has already been stretched (expanded) at least to some extent, when the same operation as in the initial setting of the film F is performed, the film F is inserted into the film insertion plate unit 53. You may get caught in the corner of the.
[0007]
In the packaging device 1 of the above publication, when the film F is sandwiched between the first and second feeder units 61 and 62, the belts 22, 23, and 24 of the first feeder unit 61 are cut in the film width direction of the notch 53a. Each belt 22, 23, 24 of the second feeder unit 62 is positioned at the position of the notch 53b in the film width direction.
[0008]
However, in the case of a wide film, when the second feeder unit 62 is brought to the position in the film width direction of the notch 53b, the second feeder unit 62 is moved to a position that matches the film width while the film F is widened. It takes a long time to complete the film, and the time until the initial film setting operation is completed becomes longer. Also, the film F is not widened, and the film F is wasted. Further, when the wide film F is initially set, if the second feeder unit 62 is brought to the position in the film width direction of the notch 53b, the film F is caught in the one-way roller 59 while being widened. There is.
[0009]
An object of the present invention is a packaging device that performs film set control for setting a film while spreading the film in order to hold the film in tension, and the catching and entrainment of the film during the film setting operation can be suppressed. It is to provide something with little waste.
[0010]
[Means for Solving the Problems]
Claim 1 The packaging apparatus according to the present invention is a packaging apparatus having a mechanism for pressing an object to be packaged against a tension-held film, and includes a roll holder, a first feeder, a second feeder, a feeder moving tool, and a control unit. I have. The roll holder holds the film roll rotatably. A 1st feeder hold | maintains the film width direction 1st part of the film pulled out from the film roll hold | maintained at the roll holder, and sends a film to a film longitudinal direction. A 2nd feeder hold | maintains the film width direction 2nd part of the film pulled out from the film roll hold | maintained at the roll holder, and sends a film to a film longitudinal direction. The feeder moving tool changes the relative distance in the film width direction of the first and second feeders. The control unit performs film set control. In the film set control, the film is fed in the film longitudinal direction by the first and second feeders while increasing the relative distance in the film width direction of the first and second feeders by the feeder moving tool. Further, in the film set control, when the film set control has not been performed once after the film holder is held by the roll holder, the initial value of the relative distance in the film width direction of the first and second feeders is set to the first value. If the film set control is performed even once after the film roll is held by the roll holder and the film set control is performed once, the initial value is set to the second distance and the film set process is performed again. Make it. For at least a film having a large width dimension, the second distance that is the initial value of the refilm setting process is set larger than the first distance that is the initial value of the normal film setting process.
[0011]
Claim 1 In the packaging apparatus, in the film set control, the first and second feeders holding the film width direction first part and the film width direction second part of the film follow the film width direction while feeding the film in the longitudinal direction. Increase the relative distance. Therefore, at the time of this film set control, at least one of the first and second feeders gradually moves so as to hold the outside of the film. In this way, the position of the film held by the feeder gradually shifts to the outside while feeding the film. Therefore, before the film setting control is started, the film is set in the first and second feeders without being unfolded. Even so, the film held in the first and second feeders gradually becomes wider during the film set control. Then, when the relative distance between the first and second feeders becomes approximately the width of the film, the both sides are changed to the state held by the first and second feeders while the film is spread.
[0012]
And this Claim 1 In the case of the packaging apparatus, when the film holder is not controlled even after the film roll is held by the roll holder, the film setting process is usually performed, and the film set is set once even after the film holder is held by the roll holder. When the control is performed, the re-film setting process is performed. In the re-film setting process, the second distance which is the initial value is set to be larger than the first distance which is the initial value of the normal film setting process, at least for a film having a large width dimension. Therefore, in the re-film setting process, the initial value is set to be small as in the normal film setting process even though the film is spread to some extent, and the problem that the film is caught while being spread is suppressed. In addition, the film can be prevented from being caught, and at the time of setting a film having at least a large film width, the time required for the re-film setting process is shortened and the amount of wasted film is reduced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A film transverse feed type stretch wrapping apparatus according to an embodiment of the present invention is shown in FIG. This packaging device 1 performs film packaging by pushing up a commodity G such as a fresh food product placed on the tray T against the stretch film F held in tension, and folding the peripheral portion of the film F into the bottom side of the tray T. Device. In addition to the film wrapping function, the wrapping device 1 also has a weighing function and a pricing function by labeling.
[0014]
<Overall outline of the device>
As shown in FIGS. 1 and 2, the packaging device 1 includes a weighing-in mechanism 2, a packaging station 3, a roll support mechanism 4, a film delivery mechanism 5, a film transport mechanism 6, a folding mechanism 7, and a seal. And a mechanism 8.
[0015]
The weighing-in mechanism 2 is provided at the front center of the main body 1a. The packaging station 3 is a space formed in the main body 1a. The roll support mechanism 4 is disposed on both sides of the main body 1a and holds the film roll R, respectively. The film delivery mechanism 5 delivers the film F drawn from the film roll R upward. The film transport mechanism 6 receives the film F from the film delivery mechanism 5 and transports the film F to the packaging station 3. The folding mechanism 7 wraps an article to be packaged with the film F conveyed to the packaging station 3. The sealing mechanism 8 performs heat sealing on the film F folded on the bottom surface side of the package by the folding mechanism 7.
[0016]
Further, a control device (control unit) 9 including a computer having a display panel 9a, operation keys 9b, a storage unit (storage unit) 9c, and the like is disposed on the main body 1a. The control device 9 controls the operation of each of the mechanisms 2, 5, 6, 7, and 8, and calculates the price of the product G based on a signal indicating the weight of the product G measured by the weighing-in mechanism 2. The label printer 10 and the label issuing machine 11 that print the weight, price, etc. of the product G on the label are controlled. The display panel 9a is a touch panel display, and operation buttons are also arranged on the panel. The storage unit 9c stores data relating to the film F input from the display panel 9a, the operation keys 9b, or the like or transferred from an external device. The data related to the film F in the storage unit 9c includes data on the film width of the film F to be used.
[0017]
The film roll R used in the packaging device 1 is one in which stretch films F having a predetermined width dimension are wound in multiple layers.
[0018]
<Weighing-in mechanism>
The weighing-in mechanism 2 includes a weighing device that measures the weight of a product G such as food stored in the tray T, and a plurality of loading belts stretched between a pair of rollers. The carry-in belt is provided with a conveying projection, and if the tray T containing the product G is placed on the weighing instrument (above the carry-in belt) as shown in FIG. After being weighed, the tray T is pushed by the protrusion of the carry-in belt and is sent onto a support member 33 of a lifter mechanism 30 (described later) of the packaging station 3 (see FIGS. 15 and 16).
[0019]
<Packaging station>
The packaging station 3 is a space in the main body 1a where a series of film packaging processes are performed on the product G in the tray T that has been weighed. In the packaging station 3, the stretch film F is stretched by the film transport mechanism 6, and the lifter mechanism 30 pushes up the tray T and the product G against the stretched film F (see FIG. 17). And the tray T and the goods G will be in the state covered with the film F by folding the part around the film F in the bottom face side of the tray T in the state where the folding mechanism 7 pushed up the film F.
[0020]
A lifter mechanism 30 for holding the bottom surface of the tray T and moving the tray T and the product G upward is provided at the lower portion of the packaging station 3. As shown in FIG. 3, the lifter mechanism 30 is rotatably supported on a support base 31, a plurality of support bars 32 fixed on the support base 31, and upper ends of the support bars 32. And a support member 33 for receiving the bottom surface. In addition, the lifter mechanism 30 includes an electric ball screw mechanism 34 that moves the support base 31 up and down.
[0021]
Each support bar 32 is provided with a hinge that bends forward, backward, left and right at the center thereof, and temporarily falls when left and right folding plates 76 and 77 and a rear folding plate 78 described below enter the lower portion of the tray T. Have been to.
[0022]
<Roll support mechanism>
Roll support mechanisms (roll holders) 4 that support the film roll R are provided approximately symmetrically on both sides of the main body 1a (see FIGS. 2 and 4). The roll support mechanism 4 is mainly composed of a roll bar 4a (see FIG. 5).
[0023]
The roll bar 4a allows the film roll R to be inserted and holds the film roll R with a holder or the like. The roll bar 4a is rotatably supported by the main body 1a, and a belt 4c is hung on a pulley 4b fixed to one end thereof (see FIG. 2).
[0024]
The belts 4c of the both roll support mechanisms 4 are driven by one film roll drive motor 4d. The film roll drive motor 4d can be rotated forward and backward, and drives one roll support mechanism 4 during forward rotation and the other roll support mechanism 4 during reverse rotation. A film brake and a one-way clutch 4e are provided between the belt 4c and the film roll drive motor 4d. Thereby, when the other roll support mechanism 4 is driven, the roll bar 4a does not rotate in the opposite direction, and the feeding of the film F from the film roll R can be stopped.
[0025]
<Film delivery mechanism>
The film delivery mechanism 5 is a mechanism for delivering the film F drawn from the film roll R to a pair of feeder units 61 and 62 of the film transport mechanism 6 described later. As shown in FIG. 2, the film feed mechanism 5 mainly includes a feed roller 51, a feed motor 52 that rotates the feed roller 51, a film insertion plate unit 53, and a film insertion plate that moves the film insertion plate unit 53 up and down. And a drive motor 54.
[0026]
(Feeding roller)
The feeding roller 51 is a roller disposed obliquely above the film roll R held by the roll support mechanism 4 and outside the film roll R, and is longer than the film roll R along the longitudinal direction of the film roll R. It extends (see FIGS. 2 and 5). The feed roller 51 is connected to a feed motor 52 through a belt, and rotates by the operation of the feed motor 52.
[0027]
(Film insertion plate unit)
The film insertion plate unit 53 is mainly composed of two plate members 57 and 58, and is disposed above the film roll R supported by the roll support mechanism 4, as shown in FIGS. . The film insertion plate unit 53 also extends longer than the film roll R along the longitudinal direction of the film roll R.
[0028]
6 and 7, the film insertion plate unit 53 includes two plate members 57 and 58 each having one end connected by a hinge (not shown), and a plurality of plate members 57 supported by the plate member 57. The one-way roller 59. Each plate member 57, 58 has divided plates 57a, 58a and is screwed to the inner surface thereof as shown in FIG. These divided plates 57a and 58a are fixed to the plate members 57 and 58 so as to form notches 53c to 53i to be described later, and can be slid in the film width direction in accordance with the film width.
[0029]
As shown in FIG. 6, the two plate members 57 and 58 are formed with notches 53 a to 53 i in the upper part. The distance between the notch 53a and the notches 53c to 53i is a distance corresponding to several types of films F having different film widths. For example, the distance between the outside of the notch 53a and the outside of the notch 53i substantially matches the film width of the film F having the largest film width. The notches 53a and 53b are notches of the plate members 57 and 58 themselves, the notches 53c to 53h are notches formed by the divided plates 57a and 58a, and the notches 53i are connected to the plate members 57 and 58 themselves. It is a notch formed from the dividing plates 57a and 58a.
[0030]
Further, the plate member 58 rotates with respect to the plate member 57 about a hinge portion (not shown), and the plate member 58 can be opened and closed as shown in FIG. The state shown by represents the open state of the plate member 58).
[0031]
Furthermore, as shown in FIG. 26, the top surface (upper surface) of the plate member 57 is buffed, and the film F is cut when the film F is cut by a cutting blade 69a of a cutter mechanism 69 described later. Is held in close contact with the top surface of the plate member 57.
[0032]
As shown in FIGS. 26 and 27, the corners outside the six notches 53d, 53e, 53f, 53g, 53h, 53i of the top surface of the baffled plate member 57 are further filed. A rubble treatment is applied. This is a measure for preventing the film F from being caught during the film loading described below, particularly during the re-film loading process.
[0033]
A plurality of one-way rollers 59 are provided along the longitudinal direction (film width direction) of the plate member 57, and serve to hold the film F so that the film F sandwiched between the plate members 57 and 58 does not fall down. Fulfill. Since the film insertion plate unit 53 moves up and down, the one-way roller 59 is a resin main body plated with nickel or the like in order to reduce inertia. Since the surface of the one-way roller 59 protrudes toward the plate member 58 from the surface of the plate member 57 (see FIG. 7), the film F sandwiched between the plate members 57 and 58 is always the one-way roller 59. To touch.
[0034]
Due to the presence of the one-way roller 59, when the plate member 58 is closed and the film F is sandwiched between the plate members 57 and 58, the film F does not fall out of the film insertion plate unit 53. That is, even when the film F is cut above the plate members 57 and 58 by a cutter mechanism 69 described later, the film F is held by the one-way roller 59 and does not slip downward.
[0035]
(Film insertion plate drive motor)
The film insertion plate drive motor 54 is provided to move the film insertion plate unit 53 up and down, and moves the film insertion plate unit 53 up and down via a link mechanism. Specifically, it plays the role of switching the height position of the film insertion plate unit 53 between the position indicated by the solid line and the position indicated by the dotted line in FIG.
[0036]
<Film transport mechanism>
The film transport mechanism 6 receives the film F fed by the film delivery mechanism 5 from the film roll R, transports the film F to the central portion of the packaging station 3, and holds the film F in tension. The film transport mechanism 6 mainly includes a first feeder unit 61, a second feeder unit 62, a first feeder moving unit (feeder moving tool) 63, a second feeder moving unit (feeder moving tool) 64, and a feeder. And a drive unit 65.
[0037]
The first feeder unit 61 is disposed on the near side when viewed from the front of the apparatus 1, and the second feeder unit 62 is disposed on the other side when viewed from the front of the apparatus 1 (see FIGS. 4 and 12). The first and second feeder units 61 and 62 sandwich both side portions (front side and side portions on the front side) of the laterally fed film F with belts, and transport the film F by the operation of the feeder drive unit 65. .
[0038]
The first feeder unit 61 is operated by the first feeder moving unit 63, and the second feeder unit 62 is operated by the second feeder moving unit 64, respectively, in the film width direction (the horizontal direction in FIGS. 3, 4, and 12). ) Is configured to move. Each of the feeder units 61 and 62 is supported by two slide shafts 66 and 67 extending along the film width direction so as to be movable in the film width direction.
[0039]
As shown in FIG. 8, each feeder moving unit 63, 64 has drive motors 63a, 64a and belts 63b, 64b that move in both directions of the film width by the operation of the drive motors 63a, 64a. The feeder units 61 and 62 are connected to the belts 63b and 64b (see FIG. 8), and the feeder units 61 and 62 can move in the film width direction separately by the operation of the drive motors 63a and 64a. It is like that.
[0040]
(Details of feeder unit)
Next, the configuration of the first and second feeder units 61 and 62 will be described in detail.
Since the configurations of both feeder units 61 and 62 are substantially equal, the following description will be given taking the first feeder unit 61 as an example.
[0041]
9 to 11 show detailed views of the first feeder unit 61. FIG. These drawings include clamps 25 to 29 which are not shown in FIGS. 12 shows a top view of the first and second feeder units 61 and 62 including the clamps 25 to 29, and FIG. 13 shows an arrangement of the clamps 25 to 29 extracted from FIG.
[0042]
As shown in these drawings, the first feeder unit 61 includes a frame 21, a lower belt 22, an upper belt 23, an introduction belt 24, main clamps 25 to 27, and auxiliary clamps 28 and 29. Yes.
[0043]
(flame)
The frame 21 supports the pulleys that support the belts 22 to 24 and the clamps 25 to 29, and constitutes the skeleton of the first feeder unit 61.
The frame 21 has a band plate 21 a having substantially the same width as the belts 22 and 23 between the upper belt and the lower belt of the lower belt 22. The band plate 21a serves to sandwich the belts 22 and 23 and the film F between main clamps 25 to 27 described later.
[0044]
(belt)
The lower belt 22 comes into contact with the film F from below, and is stretched around six pulleys as shown in FIG. One of these pulleys is connected to the drive motor of the feeder drive unit 65 through a plurality of belts as shown in FIG. When the drive motor of the feeder drive unit 65 is operated, the lower belt 22 of both the feeder units 61 and 62 moves in synchronization.
[0045]
The upper belt 23 rides on the lower belt 22 and follows the movement of the lower belt 22. The upper belt 23 is wound around four pulleys.
[0046]
The introduction belts 24 are respectively arranged outside the longitudinal ends of the lower belt 22 and are in contact with the vertically extending portions of the lower belt 22. Further, the introduction belt 24 can be switched between a state indicated by a solid line and a state indicated by a one-dot chain line in FIG. 9 by a driving tool (not shown). In the state shown by the alternate long and short dash line in FIG. 9, there is a gap between the lower belt 22 and the introduction belt 24 so that the film F held by the film insertion plate unit 53 of the film delivery mechanism 5 can enter the gap. become. That is, the introduction belt 24 plays a role of holding the film F fed from below by the film delivery mechanism 5 between the lower belt 22 and guiding it between the lower belt 22 and the upper belt 23.
[0047]
When the film F held by the film insertion plate unit 53 enters the gap between the lower belt 22 and the introduction belt 24, the film F is sandwiched between the belts 22 and 24 and the film insertion plate unit 53 The positions of the feeder units 61 and 62 in the film width direction are set so that the positions in the film width direction of any of the notches 53a to 53i coincide with the positions in the film width direction of both belts 22 and 24 (FIG. 6).
[0048]
(Main clamp)
The main clamps 25 to 27 are disposed between the upper belt and the lower belt of the upper belt 23, and are disposed at a position overlapping the belts 22 and 23 in plan view. These clamps 25 to 27 are operated by a solenoid (not shown) (an electromagnetic actuator fixed to the outer surface of the frame 21). The clamps 25 to 27 normally do not apply a force to the belts 22 and 23, but are pressed down when the solenoid is turned on, and the clamps 25 to 27 face downward toward the lower belt of the upper belt 23 and the upper belt of the lower belt 22. These are strongly clamped between the strips 21a. Therefore, when the film F is between the lower belt 22 and the upper belt 23, if the solenoid is turned on, the film F is held in close contact with the belts 22, 23, and if the solenoid is turned off, the holding of the film F is released. It will be.
[0049]
(Auxiliary clamp)
The auxiliary clamps 28 and 29 are arranged at positions away from the main clamps 25 to 27 that are aligned in a straight line in plan view. Specifically, as shown in FIG. 13, the main clamps 25 to 27 are arranged so as to overlap the belts 22 and 23, and the belts 22 and 23 together hold the film F and hold the film F strongly. Reference numerals 28 and 29 are arranged at positions shifted inward from the belts 22 and 23 so as to hold the film F by directly gripping the film F. In the following, since the auxiliary clamps 28 and 29 have the same configuration, the auxiliary clamp 28 will be described as an example.
[0050]
As shown in FIGS. 9 to 11, the auxiliary clamp 28 mainly includes a fixed contact portion 28 a that is positioned above the film F and a moving contact portion 28 b that is positioned below the film F. Has been. When the moving contact portion 28b moves upward, the film F is strongly held between the fixed contact portion 28a and the moving contact portion 28b, and the film F is clamped.
[0051]
The fixed contact portion 28a is a plate member that extends long in the film transport direction (the left-right direction in FIG. 10, the up-down direction in FIG. The fixed contact portion 28a is fixed to the frame 21 via an L-shaped fixture 28d (see FIG. 11).
[0052]
The moving contact portion 28b is moved up and down by a solenoid 28c and extends in the film transport direction. However, the moving contact portion 28b has a shorter length in the film transport direction than the fixed contact portion 28a. A solenoid 28c that moves the moving contact portion 28b up and down is fixed to the frame 21 via a fixture 28e (see FIG. 11).
[0053]
<Cutter mechanism>
A cutter mechanism 69 is provided on the front side of the film transport mechanism 6 in the film transport direction. The cutter mechanism 69 cuts the film F between the mechanisms 5 and 6 after the film F transferred from the film delivery mechanism 5 to the film transport mechanism 6 is transported by a predetermined amount by the film transport mechanism 6. Is provided. The cutter mechanism 69 has a cutting blade 69a longer than the film width, and cuts the film F by moving the cutting blade 69a with an actuator.
[0054]
The cutter mechanism 69 is also provided with two sets, one for when the film F is fed out from the film roll R on the front right side and one for when the film F is fed out from the film roll R on the left front side. (See FIG. 2).
[0055]
<Folding mechanism>
As shown in FIGS. 2 and 3, the folding mechanism 7 mainly includes left and right folding plates 76 and 77, a rear folding plate 78, and a front folding rod 79.
[0056]
The left and right folding plates 76 and 77 fold both ends of the film F in the film transport direction to the bottom surface side of the tray T, and can be moved horizontally by a motor and a timing belt (not shown).
[0057]
The rear folding plate 78 folds the side portion of the film F on the second feeder unit 62 side to the bottom surface side of the tray T, and can be moved horizontally by a motor and a timing belt (not shown).
[0058]
The front folding bar 79 is arranged so that the side of the film F on the first feeder unit side is folded to the bottom surface side of the tray T when the tray T is discharged by the discharge pusher 79a that pushes the tray T toward the seal mechanism 8 side. Has been.
[0059]
<Seal mechanism, label printer, label issuing machine>
The seal mechanism 8 serves to heat and seal the bottom surface of the tray T pushed out by the discharge pusher 79a, and the front side portion also serves as a discharge table. Then, a label printed by the label printer 11 is attached to the packaged product discharged here.
[0060]
<Control device>
The control device 9 arranged on the upper part of the main body 1a is configured as shown in FIG. 14, and controls each operation of the mechanisms 2, 5, 6, 30, 7, 8, 10, and 11. The operation by the operator is accepted not only by the operation buttons and operation keys 9b in the display panel 9a but also by each switch and dials 16, 17, 18, and 19. Further, when the film exchange door 1b is opened or closed, the control device 9 receives the detection result of the state change from the door opening / closing sensor 9d which is a proximity switch for monitoring the opening / closing of the film exchange door 1b.
[0061]
<Outline of operation of packaging device>
Next, operation | movement of the packaging apparatus 1 which has the above structures is demonstrated easily. In the apparatus 1, when the operator places the tray T containing the product G on the weighing instrument of the weighing-in mechanism 2, the loading belt starts moving after the weighing value is stabilized and the weighing is completed. The projection fixed to the carry-in belt moves according to the movement of the carry-in belt, and pushes out the tray T on which the product G is placed onto the support member 33 of the lifter mechanism 30 (see FIG. 16).
[0062]
On the other hand, the film F transferred from the film roll R to the film transport mechanism 6 by the film delivery mechanism 5 is cut by the cutter mechanism 69 into a single rectangular film F, and both of the films F reach the upper side of the lifter mechanism 30. It is carried by feeder units 61 and 62. Then, above the lifter mechanism 30, the periphery of the film F is strongly held by the operation of the clamps 25 to 29.
[0063]
And the lifter mechanism 30 pushes up the goods G and the tray T with respect to the film F with which the circumference | surroundings, especially both side parts were hold | maintained strongly in this way (refer FIG. 17). Then, the film F whose periphery is strongly held stretches so as to cover the top of the commodity G and the tray T.
[0064]
In this state, when the rear folding plate 78 and the left and right folding plates 76 and 77 move horizontally to the bottom surface side of the tray T, the clamps 25 to 29 other than the clamps on the front side (left side in FIG. Is released, and the three sides of the film F are folded to the lower side of the tray T. When the discharge pusher 79a pushes the tray T toward the seal mechanism 8, one side of the film F on the front side that has not been folded hits the front folding bar 79, and the tray T moves toward the seal mechanism 8 as the tray T moves. It will be folded under T. The clamp on the front side releases the film F at this time. Further, during this movement, when the film F folded under the tray T is heat-sealed and discharged to the position shown in FIG. 18, the packaging is completed with the film F covering the product G and the entire tray T. It becomes.
[0065]
Furthermore, when processing including labeling is selected, the price or weight of the product calculated based on the measured value is printed on the label by the label printer 10 and the label is packaged by the label issuing machine 11 The product G and the tray T are attached.
[0066]
<Film loading of packaging equipment>
Next, film loading will be described. Film loading is an operation performed by pressing a film loading button which is one of the operation buttons on the display panel 9a. In principle, the film loading is performed when the packaging apparatus 1 starts to be used for the first time or on the film roll R. This is a film setting operation performed when the wound film F is used up.
[0067]
However, it is considered that the operator presses the film loading button again when it is visually confirmed that the film F has not been sufficiently tensioned once it has been loaded. Further, depending on the arrangement of the operation buttons in the display panel 9a, it may be considered that the film loading button is pressed by mistake with the film feeding button. In such a case, since film loading has already been performed and the film F has been spread to some extent, an operation different from the film loading operation immediately after the film roll R is set is performed. It is preferable.
[0068]
In view of this, when the film loading button is pressed, the control device 9 of the packaging device 1 of the present embodiment performs the following determination to perform normal film loading processing (normal film setting processing) or re-film loading processing. Select whether to perform (re-film set processing).
[0069]
[Determination of film loading process selection]
When the film loading button is pressed in step S1 shown in FIG. 28, the control device 9 performs normal film loading processing or re-filming based on the history data of the detection results from the stored door opening / closing sensor 9d. Select whether to perform loading processing. Specifically, as shown in FIG. 28, when the film support R has been held by the roll support mechanism 4 and no film loading has been performed, that is, there is a history that the film exchange door 1b has been opened and closed. If there is no film loading after that, the process proceeds from step S2 to step S3, and the normal film loading process is performed. If film loading is performed after the film support R is held by the roll support mechanism 4, that is, if the film exchange door 1b has never been opened / closed after the previous film loading operation, the steps from step S2 to step S2 are performed. The process proceeds to S4 to perform a re-film loading process. Such a determination method is based on the premise that when the film F is set from the beginning, the film exchange door 1b is always opened and closed when the film roll R is held by the roll support mechanism 4.
[0070]
[Operation when normal film loading process is executed]
Usually, the film loading process is performed when the packaging apparatus 1 is first used or when the film F wound around the film roll R is used up as described above. The premise of this processing is that the following first step and second step are performed, and when the film loading button is pressed on that, the control device 9 performs normal film loading processing.
[0071]
(First step)
When performing a film loading operation for replacing the film roll R or setting a new one so that the packaging apparatus 1 can be used, the operator first presses the emergency stop switch 19. Then, the power supply to the drive part of each mechanism is cut off, and the malfunction of the drive part during work is prevented.
[0072]
And an operator opens the film exchange door 1b and the side cover 1c (refer FIG. 1) in the side surface of the packaging apparatus 1. FIG. Since the film roll R can be inserted into the roll bar 4a from the front by opening the side cover 1c, the operator inserts the film roll R into the roll bar 4a and fixes it with a holder or the like.
[0073]
(Second step)
Next, the operator opens the plate member 58 of the film insertion plate unit 53 (see the state of the plate member 58 indicated by the dotted line in FIG. 4). Then, since the plate members 57 and 58 are separated from each other on the front side as shown in FIG. 19, the operator pulls the front end of the film F from the film roll R, and the film F as shown in FIG. The tip is hung on the plate member 58 from the inside to the outside.
[0074]
At this time, it is not necessary for the film tip to be hooked on the plate member 58, and it is not necessary to spread the film tip. If the film F is on the cutout 53a on the front side as shown in FIG. The film F does not have to be hung on the respective cutouts 53b to 53i.
[0075]
Therefore, the operator does not have to go around the side of the packaging device 1 to work, and can reach out from the front side and hang only the front side portion of the film tip on the notch 53a.
[0076]
Then, after putting the film F on the plate member 58, the operator closes the plate member 58 and closes the film exchange door 1b and the side cover 1c as shown in FIG.
[0077]
(Third step)
Next, the operator releases the emergency stop switch 19 and presses the film loading button arranged in the display panel 9a. When the film loading button is pressed, the control device 9 moves the film delivery mechanism 5 and the film transport mechanism 6 to execute normal film loading processing.
[0078]
In this normal film loading process, the movement of the second feeder unit 62 differs depending on the film width. The control device 9 reads the data of the width dimension of the film F from the storage unit 9c, and determines the movement of the second feeder unit 62 based on the data.
[0079]
The control device 9 moves the film transport mechanism 6 so that the belts 22, 23, 24 of the first feeder unit 61 are in the film width direction position of the notch 53a, and the belts 22, 23, 24 of the second feeder unit 62 are A predetermined notch is positioned in the film width direction position. The position in the film width direction of the predetermined notch that is the initial position of the second feeder unit 62 is automatically determined by the width dimension of the film F.
[0080]
For example, in the case of the maximum width film covering the notches 53a and 53i at both ends, the second feeder unit 62 is moved to the position of the notch 53d (see FIG. 6). Further, in the case of the film F that has the narrowest width and covers only the notches 53a, 53b, and 53c, the second feeder unit 62 is moved to the position of the notch 53b.
[0081]
In the following description, the film F having the maximum width is assumed.
[0082]
(4th step)
Next, as shown in FIG. 22, the control device 9 changes the posture of the introduction belt 24 so that a gap is opened between the lower belt 22 and the introduction belt 24, and the film F held in the gap is removed. The film insertion plate unit 53 is raised so as to enter. At this time, the feeding roller 51 is also rotated.
[0083]
Then, the posture of the introduction belt 24 is returned to the original position, and the film F in the notch 53 a is sandwiched between the lower belt 22 and the introduction belt 24 of the first feeder unit 61.
[0084]
(5th step)
When the film F is sandwiched between the first feeder unit 61, the control device 9 operates the feeder driving unit 65 to start conveying the film F. Then, after the film F has begun to be sandwiched also in the second feeder unit 62, the film insertion plate unit 53 is lowered. The state at this time is shown in FIG. The leading edge of the film F is passed between the lower belt 22 and the introduction belt 24 between the feeder units 61 and 62 between the lower belt 22 and the upper belt 23, and the film F continues from the film insertion plate unit 53 to the film roll R. ing. Even when the film insertion plate unit 53 is lowered, the one-way roller 59 rotates in the forward rotation direction, so that the feeding of the film F is not hindered.
[0085]
Then, the control device 9 operates the second feeder moving unit 64 while feeding the film F forward by the first and second feeder units 61 and 62, and gradually moves the second feeder unit 62 to the other side. (Upper side in FIG. 24). As a result, the portion of the film F that has been sandwiched between the lower belt 22 and the upper belt 23 is removed from the second feeder unit 62, but the subsequent portions of the film F are successively sandwiched between the second feeder unit 62. Go.
Then, as shown in FIG. 24, the first and second feeder units 61 and 62 hold the film F in an expanded state as the film conveyance proceeds.
[0086]
When the second feeder unit 62 is moved to the position corresponding to the film width, or to the position of the notch 53i in the case of the maximum width film F, the control device 9 uses the first and second feeder units 61 and 62. Stop feeding film F.
[0087]
At this time, in the film insertion plate unit 53, as shown in FIG. 25, both side portions of the film F pass through the notch 53a and the notch 53i.
[0088]
(6th step)
Next, the control device 9 operates the cutter mechanism 69 to cut the film F along the cutting line (one-dot chain line) C in FIG. As a result, the subsequent film F can be received on both sides by the first and second feeder units 61 and 62.
[0089]
When the film F is cut, the film F is held in close contact with the buffed top surface of the plate member 57 and the one-way roller 59 prevents the film F from falling, so that the film F does not slip downward. .
[0090]
(7th step)
When a series of normal film loading processes from the third step to the sixth step is completed, the operator who has confirmed that presses the emergency stop switch 19 and performs the first and second feeders in the state shown in FIG. The film F held by the units 61 and 62 is removed.
[0091]
[Operation when re-film loading process is executed]
The re-film loading process is performed when the film loading is performed once, but it is visually recognized that the tension of the film F is not enough, and the operator presses the film loading button again, or when the film loading button is accidentally pressed. This is executed by the control device 9.
[0092]
In the re-film loading process, basically the same process as the normal film loading process is executed, but the movement of the second feeder unit 62 may be different from the normal film loading process. Specifically, when the film has a large film width, the initial position of the second feeder unit 62 is different from that in the normal film loading process. This will be described below assuming a film F having the maximum width.
[0093]
When the re-film loading process is executed, the control device 9 moves the film transport mechanism 6 so that the belts 22, 23, and 24 of the first feeder unit 61 are positioned at the positions in the film width direction of the notches 53a. Each of the belts 22, 23 and 24 is positioned at the position of the cutout 53f in the film width direction. Since the initial position of the second feeder unit 62 is the position of the notch 53d in the normal film loading process, the initial position of the second feeder unit 62 is shifted outward by two notches in the re-film loading process. It will be. This is because even if the initial position of the second feeder unit 62 is shifted in this way, the film F is spread to some extent by the previous film loading. It is because it can grasp.
[0094]
Further, by bringing the initial position of the second feeder unit 62 to the outside as compared with the normal film loading process in this way, the film F is prevented from being caught at the corners of the notches 53e to 53i during the refilm loading operation. be able to. That is, when the second feeder unit 62 is started from the position of the notch 53d even though the film F is spread to some extent, a part of the film F positioned outside the notch 53d from the beginning is part of the film F. However, since the second feeder unit 62 is started from the position of the notch 53f, the film F is unlikely to get caught in the notches 53e to 53h. Become.
[0095]
Further, in the packaging device 1 of the present embodiment, as shown in FIG. 27, the outer corners of the cutouts 53d to 53i where the film F is relatively easily caught are subjected to file processing, and the top surface of the plate member 57 Since the initial buffing of the second feeder unit 62 is shifted in the re-film loading process as described above, the film F notches 53d to 53i during film loading are partially damaged. There is less catching on the corner.
[0096]
When a film F having a narrow width, for example, a film F having a minimum width, is loaded, the initial position of the second feeder unit 62 is the same notch 53b in both the normal film loading process and the re-film loading process. That is, in the case of the narrow film F, the control of the film loading by the control device 9 is exactly the same regardless of whether the normal film loading process is selected or the re-film loading process is selected.
[0097]
<Characteristics of packaging equipment>
(1)
In the packaging device 1 of this embodiment, the control device 9 performs control to increase the distance between the first and second feeder units 61 and 62 while transporting the film F during film loading. Therefore, even when the film F is set in the film insertion plate unit 53 in a state where the film F is not unfolded as shown in FIGS. 6 and 30, the film F is held in an unfolded state gradually during the film loading control. It becomes like this. When the distance between the first and second feeder units 61 and 62 corresponds to the film width, the film F is held in the film insertion plate unit 53 in a state where the film F is fully expanded (see FIG. 25). The both sides are changed to a state in which the first and second feeder units 61 and 62 can be held.
[0098]
Thus, in this packaging apparatus 1, even if the operator does not set the front end of the film F drawn from the film roll R in an expanded state, that is, even if the front end of the film F is set with wrinkles, Film F is automatically spread. For this reason, in the operation | work at the time of film loading, the operator's effort of expanding the front-end | tip of the film F currently performed is saved.
[0099]
Also, the operator can almost complete the film loading operation by placing the film F on the film insertion plate unit 53 and then pressing the film loading button. That is, since the control device 9 automatically spreads the film F, the operator only needs to remove the leading end portion of the film F having a wrinkle at the end to complete the film loading operation. Therefore, the burden on the operator who performs the film loading operation is reduced, and an easy packaging apparatus 1 such as film exchange is realized.
[0100]
(2)
In the packaging device 1, when the film loading button is pressed, according to the spread degree of the film F, specifically, after estimating the spread degree of the film F based on the opening / closing history of the film exchange door 1 b, Accordingly, it is selected whether the normal film loading process or the re-film loading process is performed (see FIG. 28). Thereby, as described above, the film F can be prevented from being caught in the notches 53d to 53i during film loading.
[0101]
In the re-film loading process, the moving distance of the second feeder unit 62 is reduced by shifting the initial position of the second feeder unit 62 to the outside of the normal film loading process. This shortens the processing time and reduces the amount of wasted film F.
[0102]
(3)
In the packaging apparatus 1, the initial position in the film width direction of the second feeder unit 62 is determined according to the width dimension of the film F in the normal film loading process and the refilm loading process. For example, in the normal film loading process, the position of the notch 53d is the initial position for the maximum width film F, while the position of the notch 53b is the initial position for the minimum width film F. In the re-film loading process, the position of the notch 53f is set as the initial position in the film F having the maximum width, whereas the position of the notch 53b is set as the initial position in the film F having the minimum width.
[0103]
Thus, by changing the initial position of the second feeder unit 62 in the film width direction according to the width dimension of the film F, in other words, according to the width dimension of the film F, the first and second feeder units 61, By changing the initial value of the relative distance in the film width direction of 62, the film F can be prevented from being caught in the notches 53c to 53i and the film F can be prevented from being caught in the one-way roller 59. The time until film loading is completed is shortened, and the amount of film F that is wasted is reduced.
[0104]
(4)
In the packaging apparatus 1, the determination for selecting between the normal film loading process and the re-film loading process is performed based on the opening / closing history of the film exchange door 1 b. Since the door opening / closing sensor 9d for monitoring the opening / closing of the film exchange door 1b has been conventionally provided for safety, the film loading process is selected only by adding software in the control device 9 here. Has been realized.
[0105]
(5)
In the packaging device 1, when the film F is cut by the cutting blade 69 a of the cutter mechanism 69, the top surface (upper surface) of the plate member 57 so that the film F is held in close contact with the top surface of the plate member 57. A buffing process is performed on the slab (see FIGS. 26 and 27).
[0106]
However, in the re-film loading process, there may be a phenomenon that the film F is caught on the corner of the top surface of the plate member 57. In such a case, the problem that the film F does not spread well occurs, and the film F is wasted and needs to be loaded again.
[0107]
On the other hand, in the packaging device 1, as shown in FIG. 27, the outer corners of the cutouts 53d to 53i, on which the film F is relatively easily caught, are filed. Thereby, the buffing on the top surface of the plate member 57 is partially roughened, and the film F is less likely to be caught at the corners of the notches 53d to 53i during film loading. This filed device is coupled with the fact that the initial position of the second feeder unit 62 is shifted to the outside of the normal film loading process in the re-film loading process, and the film F is cut into the corners of the notches 53d to 53i. The catching phenomenon is reduced.
[0108]
<Modification of this embodiment>
In the above embodiment, the determination for selecting between the normal film loading process and the re-film loading process is performed based on the opening / closing history of the film exchange door 1b. However, other determination methods may be used. .
[0109]
For example, in order to determine the extent of the spread of the film F, when the plate members 57 and 58 of the film insertion plate unit 53 are in the lowered position, it is determined whether or not the film F exists at the positions of the notches 53c to 53i. It can also be detected by a sensor (for example, seven photoelectric sensors). In this case, since the actual spread degree of the film F is measured instead of being estimated, defects at the time of film loading can be more reliably suppressed.
[0110]
Moreover, it is also possible to estimate the spread degree of the film F by using an open / close sensor that monitors the opening / closing of the side cover 1c instead of the door open / close sensor 9d that monitors the opening / closing of the film exchange door 1b.
[0111]
【The invention's effect】
In the present invention, the initial value of the relative distance in the film width direction of the first and second feeders in the film setting control (film loading control) is determined according to the width dimension of the film and the degree of film spreading. Therefore, when the width of the film is large, the initial value is set to a relatively large value to prevent the film from being caught on the roller while it is being spread, or when the film has already been spread to some extent. Can be changed to a large value to suppress film catching during the film setting operation. Further, in the present invention, the initial value is set so that the film can be prevented from being caught or caught and the feeder moving distance by the feeder moving tool is minimized according to the width of the film and the extent of the film. As a result, the time for the film setting operation is shortened and the amount of wasted film is reduced.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a packaging device according to an embodiment of the present invention.
FIG. 2 is a schematic front view of the inside of the packaging apparatus.
FIG. 3 is a schematic view taken along the line III-III in FIG. 2;
FIG. 4 is a schematic plan view of the inside of the packaging device.
FIG. 5 is a schematic side view of the inside of the packaging apparatus.
FIG. 6 is a side view of the film insertion plate unit.
FIG. 7 is a partially enlarged sectional view of a film insertion plate unit.
FIG. 8 is a correlation diagram of a feeder unit and a feeder moving unit.
FIG. 9 is a front view of the feeder unit.
FIG. 10 is a plan view of a feeder unit.
FIG. 11 is a side view of the feeder unit.
FIG. 12 is a plan layout view of a feeder unit.
FIG. 13 is a plan view of a clamp.
FIG. 14 is a block configuration diagram of a control device.
FIG. 15 is an operation explanatory view of the packaging device.
FIG. 16 is an operation explanatory view of the packaging device.
FIG. 17 is an operation explanatory diagram of the packaging device.
FIG. 18 is an operation explanatory diagram of the packaging device.
FIG. 19 is an operation diagram of film loading.
FIG. 20 is an operation diagram of film loading.
FIG. 21 is an operation diagram of film loading.
FIG. 22 is an operation diagram of film loading.
FIG. 23 is an operation diagram of film loading.
FIG. 24 is an operation diagram of film loading.
FIG. 25 is a correlation diagram between a film insertion plate unit and a film after film loading.
FIG. 26 is an instruction diagram of the surface treatment of the top surface of the plate member of the film insertion plate unit.
FIG. 27 is an instruction diagram of the surface treatment of the top surface of the plate member of the film insertion plate unit.
FIG. 28 is a diagram showing a process selection flow for film loading.
[Explanation of symbols]
1 Packaging equipment
1b Film exchange door
4 Roll support mechanism (roll holder)
5 Film delivery mechanism
9 Control device (control unit)
9b Storage unit (storage means)
9d Door open / close sensor (open / close sensor)
30 Lifter mechanism
53 Film insertion plate unit
53a-53i Notch
57,58 plate member
57a, 58a Dividing plate
61 First feeder unit (first feeder)
62 Second feeder unit (second feeder)
63 1st feeder moving unit (feeder moving tool)
64 Second feeder moving unit (feeder moving tool)
F film
R film roll

Claims (1)

A packaging device having a mechanism for pressing an object to be packed against a tension-held film,
A roll holder for rotatably holding the film roll;
A first feeder for holding the film width direction first part of the film drawn from the film roll held by the roll holder and feeding the film in the film longitudinal direction;
A second feeder for holding the film width direction second part of the film drawn from the film roll held by the roll holder and feeding the film in the film longitudinal direction;
A feeder moving tool for changing the relative distance in the film width direction of the first and second feeders;
A control unit that performs film set control for feeding the film in the film longitudinal direction by the first and second feeders while increasing the relative distance in the film width direction of the first and second feeders by the feeder moving tool;
With
In the film set control, when the film set control is not performed after the roll holder holds the film roll in the film set control, the control unit determines the relative distance in the film width direction of the first and second feeders. When the initial value is set to the first distance and normal film setting processing is performed, and the film set control is performed after the film holder is held by the roll holder, the initial value is set to the second distance. Let the film set process again,
For at least a film having a large width dimension, the second distance is set larger than the first distance.
Packaging equipment.

Images