JP2014213912A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device capable of packaging pertinently a packaging object in a state where a film has an optimal tension.SOLUTION: A packaging device comprises: a pair of film feeding mechanisms sandwiching both edges of film 17a in its width direction and horizontally stretching the film 17a; a pair of first folding member (back folding member 6) and second folding member tension (tension roller 9) arranged on upper side of the film feeding mechanism 5; and a controlling part. The controlling part horizontally moves a back folding plate to a folding terminal position near an end part of a packaging object w at a side of tension roller 9 via a position near a bottom part of the packaging object w in a manner where the packaging object w is projected to higher than the back folding plate 6 and the tension roller 9 by an elevator 14 from the film 17a stretched horizontally via a space between the back folding plate 6 the tension roller 9; and executes control in which the tension roller 9 is horizontally moved to the back folding plate 6 so that a tension is provided to the film 17a.

Description

  The present invention relates to a packaging device.

2. Description of the Related Art A packaging machine (packaging device) that wraps a product with a film is known (for example, see Patent Document 1).
In the packaging machine described in Patent Literature 1, a film is horizontally stretched by a pair of clamps arranged in parallel at intervals wider than the size of a product (such as a tray on which food is placed). Above the clamps, the rear folding plate and the front side fixing member are arranged so as to have substantially the same spacing as the pair of clamps.
In this packaging machine, the product is pushed up from below the horizontally stretched film, the upper surface of the product is covered with the film, the film is folded from the left and right by the left and right pair of left and right folding plates, and then the left and right folded. After the folding plate arranged below the plate moves forward, the film folded from the left and right is further folded forward and the film is heat sealed to wrap the product.

Japanese Patent No. 3936248

  However, in the packaging machine described in Patent Document 1, when the product is pushed up, for example, when the gap between the rear folding plate and the front side fixing member is arranged with the same width as the size of the product, they are in contact with the film. There is a risk that an excessive force is applied to the end of the product tray, causing a problem such as the product tray breaking. For this reason, in a state where the product is pushed up from below the film, the interval between the product and the front side fixing member is required to be equal to or greater than a predetermined interval.

  Also, when the product is pushed up, if the horizontal distance between the pushed up product and the front fixing member is too wide, for example, the product is moved forward when the rear folding plate is moved forward and the film is folded to the bottom side of the product. , The tension of the film at the end of the product tray (the end on the front fixing member side) becomes small, and the packaging state may not be good.

  The present invention has been made in view of the above-described problems, and provides a packaging device that can be satisfactorily packaged in a state where a film is stretched with an optimum tension without applying excessive force to the article (product). The purpose is to do.

  The packaging device of the present invention is directed to a film stretched horizontally on a packaging part, by pushing up a packaged article from below the film by an elevating means, covering the top surface of the packaged article with the film, A packaging device that wraps the packaged object by folding it on the bottom side of the packaged object, and a pair of film feed mechanisms sandwiching both side edges in the width direction of the film and stretching the packaged part, and the film A pair of first and second folding members disposed above the feed mechanism in the horizontal direction with a predetermined interval larger than the size of the packaged object, the first folding member and A folding member drive unit for moving the second folding member; and a control unit, wherein the control unit is moved forward by the lifting means from below the film stretched by the film feed mechanism. In the state where the packaged object is pushed up higher than the first folding member and the second folding member through the space between the first folding member and the second folding member, the folding member drive unit Accordingly, the first folding member is moved horizontally through the vicinity of the bottom portion of the article to be packaged to the folding end position near the end of the article to be packaged on the second folding member side. By performing horizontal movement of the two folding members toward the first folding member, control is performed so that the film is folded to the bottom surface side of the package while applying tension to the film. .

  ADVANTAGE OF THE INVENTION According to this invention, the packaging apparatus which can be packaged favorably in the state which provided the optimal tension | tensile_strength to a film, without applying excessive force to a to-be-packaged object can be provided.

The perspective view which shows an example of the packaging apparatus which concerns on embodiment of this invention. The figure which shows the outline | summary of the packaging apparatus which concerns on embodiment of this invention. The electrical block diagram of the packaging apparatus which concerns on embodiment of this invention. The perspective view which shows an example of the right-and-left folding plate of the packaging apparatus which concerns on embodiment of this invention, a back folding plate, and a tension roller. The figure which shows an example of operation | movement of the right-and-left folding plate, back folding plate, and tension roller of the packaging apparatus which concerns on embodiment of this invention. The figure which shows an example of operation | movement of the packaging apparatus which concerns on embodiment of this invention, (a) is a figure which shows an example of the state which the to-be-packaged goods mounted on the raising / lowering means (elevator) were located under the film , (B) shows a state in which the packaging object is pushed up from below the film by the lifting means (elevator), the upper surface of the packaging object is covered with the film, and the packaging object is located below the left and right folding plates and the rear folding plate. Fig. 3 (c) is a diagram showing a state in which the packaging object is pushed up from below the film by the elevating means (elevator), and the packaging object is positioned above the left and right folding plates and the rear folding plate. The figure which shows an example of the state which the folding plate moved ahead, the tension roller of the front folding member moved back, and folded the film into the bottom face side of the to-be-packaged object. The flowchart which shows an example of operation | movement of the packaging apparatus which concerns on other embodiment of this invention.

A packaging device 100 according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a packaging device 100 according to an embodiment of the present invention. FIG. 2 is a diagram showing an outline of the packaging device 100 according to the embodiment of the present invention. FIG. 3 is an electrical block diagram of the packaging device 100 according to the embodiment of the present invention. FIG. 4 is a perspective view showing an example of left and right folding members 7a and 7b, a rear folding member 6 and a tension roller 9 which are left and right folding plates of the packaging device 100 according to the embodiment of the present invention. FIG. 5 is a diagram illustrating an example of operations of the left and right folding members 7 (7a, 7b), the rear folding member 6, and the tension roller 9 of the packaging device 100 according to the embodiment of the present invention. FIG. 6 is a diagram illustrating an example of the operation of the packaging apparatus 100 according to the embodiment of the present invention.

  The packaging device 100 according to the embodiment of the present invention pushes up a package w from the lower side of the film 17a with respect to the film 17a stretched on the packaging unit 16 by an elevating means (elevator 14). Is covered with the film 17a, and the film 17a is folded to the bottom surface side of the packaged object w with a folding plate (rear folding member) to wrap the packaged object w.

The packaging apparatus 100 includes a pair of film feed mechanisms 5 that pull out the film 17a from the film roll 17 and stretch the film 17a on both sides of the packaging unit 16 with both side edges in the width direction interposed therebetween.
Above the pair of film feed engines, a first folding member (rear folding member 6) and a second folding member (tension roller 9 which is a front folding roller) are arranged at a predetermined interval.

Specifically, as shown in FIG. 6, at the initial stage before film folding, the distance between the plate-shaped rear folding member 6 and the tension roller 9 is determined by the clampers 5f and 5g of the pair of film feed mechanisms 5. It is shorter than the length of the stretched film in the width direction and longer than the size of the packaged object w (specifically, the length of the packaged object along the width direction of the film).
Specifically, the distance between the rear folding member 6 and the tension roller 9 is determined by the length in the film width direction stretched by the clampers 5f and 5g of the pair of film feed mechanisms 5 and the size ( In detail, it arrange | positions so that it may become substantially half with the length of the to-be-packaged object w along the width direction of a film.
More specifically, the rear folding member 6 and the tension roller 9 which are rear folding plates are in the initial position in a state where the article to be packaged w is pushed up by the elevator 14 from below the horizontally stretched film 17a. The film 17a is disposed so as to be slightly touched or a position slightly separated from the film 17a.

  In the packaging device 100, after the article to be packaged w has been pushed up by the elevating means (elevator 14), the folding member driving unit passes the rear folding member 6 through the vicinity of the bottom surface of the article to be packaged w. The film 17a is horizontally moved to the folding end position in the vicinity of the end on the tension roller 9 side to fold the film 17a on the bottom surface side of the article to be wrapped w, and the tension roller 9 is horizontally moved toward the rear folding member 6 to obtain the film 17a. The film 17a is folded on the bottom surface side of the packaged item w while applying tension to the substrate.

  The folding end position of the rear folding member 6 is a position near or in front of the center on the bottom side of the article to be packaged w, and a position on the bottom side of the article to be packaged w and the article to be packaged w. It may be between the front end part of. The folding end position of the rear folding member 6 can be appropriately set depending on the packaging conditions.

  Hereinafter, the packaging apparatus 100 of embodiment of this invention is demonstrated in detail.

As shown in FIGS. 1, 2, 3, and 4, the packaging device 100 according to the embodiment of the present invention has a labeling function. Specifically, the packaging device 100 receives the labels issued from the stretch packaging unit 11, the label issuing unit 40 (measurement label printer), and the label issuing unit 40, and affixes the labels to the packaged goods. A label affixing portion 41, and the like.
The label issuing unit 40 is disposed on the side upper part of the heater unit 10 (heat seal unit) in the stretch wrapping unit 11, and the label applying unit 41 is disposed in the vicinity of the label issuing unit 40.

In addition, although the structure of the label sticking part 41 is not illustrated in detail, it has the following structure.
The label sticking unit 41 includes three drive mechanisms. The first drive mechanism includes a horizontal motor and a drive circuit that drives the horizontal motor, and the label suction unit surface is horizontal, that is, orthogonal to the conveyance direction of the product. In this circuit, a stepping motor is used as the horizontal motor. Therefore, the position of the label suction unit can be detected by counting the number of drive pulses of the stepping motor. For example, the stepping motor is configured to have a positive count when rotating clockwise and a negative count when rotating counterclockwise. The label attaching unit 41 includes a horizontal reference position sensor. The horizontal reference position sensor is a sensor that detects that the label suction unit is positioned at a reference position in the horizontal direction, and the drive pulse from the reference position is detected. The label adsorbing portion is positioned in the horizontal direction according to the count value.

  The second drive mechanism includes a vertical motor, a drive circuit for driving the vertical motor, and a vertical reference position sensor, and the vertical motor (second drive mechanism) moves the label adsorption unit in the vertical direction. Except for the above, it is the same as the horizontal motor described above.

  The third drive mechanism includes a rotation motor for rotating the label adsorption unit, a drive circuit for driving the rotation motor, and a rotation reference position sensor. The rotation motor (third drive mechanism) This motor is the same as the horizontal motor described above except that it is a motor that rotates the suction unit in a plane parallel to the product conveyance surface and is not a distance positioned by a drive pulse of the rotary motor but a rotation angle.

  Moreover, the label sticking part 41 is further provided with a label sticking sensor. This label sticking sensor is a sensor that detects that a label has been stuck on a product, that is, the suction surface of the label suction part is in contact with an article w (product), and the upward force on the label suction part is constant. By adding the above, it is detected that the upper parallel arm is separated from the support arm.

<Stretch packaging part 11>
In the stretch wrapping unit 11, a product placement unit 12 for placing an article to be packaged w, which is an article, is arranged in front of the machine casing 11a. The article w placed on the product placement unit 12 is machine-framed by a pusher conveyor 13. It is transported to the elevator 14 provided inside.
In addition, the case where the article w is conveyed in the state accommodated in the tray which is a container is illustrated, and the product placement unit 12 is configured as a weighing pan of the weighing unit 50, and the product placement unit 12 A width detection sensor 15a for detecting the lateral width of the article w is provided near the front side.
Further, a height detection sensor 15b that detects the height of the article w by being positioned on the side of the pusher conveyor 13 on the product conveyance path by the pusher conveyor 13 detects the height and the depth dimension of the article w ( It also serves as a length detection sensor for measuring a length dimension along the transport direction).

The width detection sensor 15a that detects the lateral width (L) of the article w placed on the product placement unit 12 includes movable right and left reflective optical sensors.
The right reflective optical sensor that detects the right side length (LR) of the article w and the left reflective optical sensor that detects the left side length (LL) of the article w are respectively substantially center positions where the article w is placed. The product is moved away from the product in the horizontal width direction (the right side length LL of the product + the left side length LR of the product). The width (dimension L) of the article w is used for controlling the packaging machine. The width detection sensor 15a transmits the length data L, that is, (LL + LR) to the control unit of the label issuing unit 40 (measurement label printer).

  The detection sensor 15b for detecting the height H of the article w has a projector and a light receiver, and a large number of light projectors and light receivers are placed at predetermined intervals in the height direction with the transport path in the middle of the product transport path. The height H of the product is detected by blocking the light of the projector according to the height of the product arranged individually and conveyed on the conveyance path. The height data is used for controlling the packaging machine and is transmitted to the control unit of the label issuing unit 40 (measurement label printer).

Further, the detection sensor 15a for detecting the vertical width w of the article w is configured such that the position P0 of the sensor with respect to a predetermined reference point and the article w placed on the article placement unit 12 are pushed by the pusher of the pusher conveyor 13. When the article w is conveyed to the elevator 14 provided inside the frame, the article w is defined as a difference (P0−P) from the position P of the pusher when the light of the sensor projector is blocked by the article w conveyed on the conveyance path. Is detected.
As described above, the size (width L, height H, height W) of the article w (tray) is detected in the middle of being conveyed to the elevator 14 provided inside the machine frame of the stretch wrapping unit 11.

  A packaging part 16 is provided above the elevator 14, a film roll 17 is set on the side of the packaging part 16 (a direction perpendicular to the pusher conveyor), and the film 17 a fed out from the film roll 17 is a film. Pulled out by the feed mechanism 5, cut to a predetermined length, and then transferred to the packaging unit 16.

In the packaging part 16, the rear folding member 6 and the left and right folding members 7 and 7 ′ that fold the end of the film 17 a that covers the upper surface of the article w to the bottom side of the article w, the left and right folding thereof are provided above the film feed mechanism 5. A discharge pusher (pusher) 8 that is positioned above the members 7 and 7 ′ and discharges the packaged article w, and a tension roller 9 that is a front folding roller is disposed at a front position in the movement direction of the discharge pusher 8. (See FIGS. 4, 5, and 6).
In the present embodiment, the left and right folding members 7a and 7b are each composed of two upper and lower plates 7f and 7g, and the rear folding member 6 and the tension roller 9 are slidably disposed between the upper and lower plates 7f and 7g. Has been.

  The film feed mechanism 5 includes a pair of upper and lower endless elastic belts 5a and 5b that sandwich a side end in the width direction of the film, and a clamp plate 5c that presses the lower elastic belt 5b toward the upper elastic belt 5a. They are arranged before and after the packaging part 16. That is, the film feed mechanism 5 has a front clamper and a rear clamper each formed of an elastic belt 5a and a clamp plate 5c.

  Further, in front of the tension roller 9, a heater (heat seal portion) 10 that heats, adheres and discharges the overlapping portion of the end portion of the film folded on the bottom surface side of the article w, and a discharge portion is arranged in front of the heater. The display operation unit 4 (console unit) is provided on the machine frame 11a, the label issuing unit 40 (measurement label printer) is provided on the side upper part of the heater (heat seal unit) 10, and the heater (heat seal unit) 10 is provided. A label affixing part 41 is installed above.

  The heater unit 10 (heat seal unit) has an endless belt made of glass fiber or the like wound in a rotatable manner across a plurality of pulleys, and a heat plate is provided below the transport surface (outward side belt) of the endless belt. Arranged and configured. The hot plate is electrically heated and becomes a heat source for the heater (heat seal part). The hot plate is electrically connected to a thermostat (not shown) constituting control means as temperature detection means, and is controlled to maintain a constant temperature. When the thermostat reaches a temperature equal to or higher than a predetermined value, power supply to the hot plate is interrupted, and when the temperature reaches a predetermined value or lower, the hot plate is supplied with current. The endless belt is heated and maintained at a temperature at which the film folded on the bottom surface of the product wrapped and discharged can be heat sealed.

  A heat insulating portion is not essential at the bottom of the pusher 8, but a heat insulating portion made of a foamed synthetic resin, for example, a polystyrene foam, a hard urethane foam, a polyethylene foam, a phenol foam, or the like is provided on the entire bottom surface of the discharge pusher 8. You may do it. The bottom surface of the heat insulating portion provided at the bottom of the discharge pusher 8 is provided with a slight gap so as not to rub against the upper surface of the heater (heat seal portion) 10 (the surface of the endless belt).

  Moreover, although the heat insulation part is not essential in front of the pressing surface of the discharge pusher 8 (the surface that contacts and transports the article to be packed with the article w), a heat insulating material is adhered to the pressing surface of the discharge pusher 8. You may make it comprise a heat insulation part. As a result, even if the pressing surface made of a metal plate is heated by the heat of the heater unit 10, the portion in contact with the packaged article w is a heat insulating portion made of a heat insulating material. Opening can be prevented.

A drive mechanism (not shown) for moving the discharge pusher 8 includes a first pusher position detection sensor that detects that the discharge pusher 8 is positioned at the standby position, and the discharge pusher 8 discharges the packaged article w. A second pusher position detection sensor is provided for detecting movement to a position discharged to the label affixing region on the part (that is, located on the heater (heat seal part) 10), and the discharge pusher 8 is connected to the second pusher. When detected by the position detection sensor, control is performed to return the discharge pusher 8 to the initial position (standby position). Thereby, the movement control which discharges the articles | goods w to the label sticking area | region Lp is performed.
That is, after detecting that the discharge pusher 8 is positioned at the standby position by the first pusher position detection sensor, the discharge pusher 8 is detected by the second pusher position detection sensor, so that the article w becomes the label attaching region Lp. It can be determined that it is located in

  Further, the label attaching region Lp indicates the completion of the packaging operation in which the discharge pusher 8 discharges the article w to the discharge unit. For example, the first and second pusher position detection sensors are transmissive photosensors, and the flag attached to the discharge pusher 8 at this position blocks the sensor so that the discharge pusher 8 is positioned at this position. Detect that In addition, as a 1st and 2nd pusher position detection sensor, you may use a reflection type photo sensor, for example.

  In the stretch wrapping unit 11 having the above-described configuration, the article w conveyed on the elevator 14 by the pusher conveyor 13 is pushed up with respect to the film 17a stretched on the wrapping part 16 by the lift of the elevator 14, and covers the upper surface of the article w. The end of the film 17a is folded to the bottom surface side of the article w by the left and right folding members 7a, 7b, the rear folding member 6, and the tension roller 9.

  Next, the article w is pushed horizontally toward the heater (heat seal portion) 10 by the discharge pusher 8, and the front end of the film 17 a is moved to the bottom surface side of the article w by the front folding roller 9 during the pushing. Furthermore, the overlapping part of the film edge part folded further and the bottom face side is heat-sealed with the heater (heat seal part) 10, and the article | item w packaged with the film is obtained. Then, the article w that has been packaged is discharged from the heater (heat seal part) 10 onto the discharge part by the push of the discharge pusher 8.

  As described above, the packaging device 100 includes the label issuing unit 40 and the label applying unit 41 that attaches the label issued from the label issuing unit 40 to the product (article) w.

The label attaching unit 41 receives the label issued from the label issuing unit 40 and attaches the label to the product w (article) that moves on the conveyor 1 ′. Specifically, the label sticking unit 41 sucks and holds the issued label by the negative pressure action of air, and presses the member that sucks and holds the label against the product w (article) in the label sticking region Lp. The label is configured to be attached to the article.
The label application position applied by the label application unit 41 differs depending on the size (for example, tray size) and shape of the product w (article). Therefore, the label sticking unit 41 is supported so as to be movable so that the label sticking position can be changed in accordance with the size and shape of the product w (article) to be conveyed.

  The label issuing unit 40 (printer) uses a mountless label roll in which a long strip of label paper, one side of which is a printing surface and the other side is a sticking surface having an adhesive layer, is rolled as a label paper. Part.

The label issuing unit 40 is provided with a roll loading unit 23 in the case, and the printing unit 25 and the printed mount on the front side in the feeding direction of the label paper of the mountless label roll 21 set in the roll loading unit 23. Cutting means 26 for cutting the label paper to a predetermined length is disposed. The mountless label roll 21 is rotatably supported by the roll loading unit 23.
The cutting means 26 prints information such as a product in the printing unit 25, and cuts the label sheet 21 ′ sent toward the label delivery port into a sheet having a predetermined length. The cutting means 26 has a pair of upper and lower movable blades 26a and a fixed blade 26b arranged so as to sandwich the label paper 21 'fed horizontally from the label delivery port.

  The printing unit includes a platen roller located below (labeling side) the label paper and a thermal head located above (printing side) the label paper 21 '. The platen roller 25a is configured to be driven and rotated by a stepping motor 25c described later. The thermal head located above the label paper 21 ′ is urged downward so that the label paper 21 ′ is clamped by the lower roller (platen roller 25a), thereby stabilizing the label paper 21 ′. It is comprised so that it can send out.

  Further, the platen roller 25a of the printing unit 25 is configured so that the respective surfaces are coated with a release agent, and the adhesive applied to the side surface opposite to the printing surface of the label paper 21 ′ is not attached, As a result, the label paper 21 'is smoothly delivered. In addition, the structure which makes the adhesive layer of label paper 21 'hard to adhere to the said roller is not restricted to the said structure, You may comprise the said roller itself or the outermost periphery part of a roller with an easily peelable member.

  As shown in FIG. 3, the packaging device 100 according to the embodiment of the present invention includes a label issuing and pasting unit 40E and a packaging mechanism control unit 102E. The label issue pasting unit 40E mainly controls the label issue unit 40 and the label pasting unit 41, and is controlled by the CPU 41. The packaging mechanism control unit 102E mainly controls the mechanism unit of the stretch packaging machine, and is controlled by the control unit 61 (CPU).

<Packaging mechanism control unit 102E>
Next, the packaging mechanism control unit 102E will be described.
The packaging mechanism control unit 102E includes a control unit 61 (CPU), a communication interface circuit (INF) 65, a ROM 62, a RAM 63, an operation unit 64, and a mechanism drive unit 66. Each component is connected via a bus (data communication line or the like) 61a.

  The communication interface circuit (INF) 65 is a circuit for communicating various data and commands with the label issuing and pasting unit 40E.

The ROM 62 stores a control program executed by the CPU 61.
The RAM 63 has various registers and flag areas used when the CPU 61 executes the control program of the ROM 62, and various tables for determining control data based on product shape data (vertical, horizontal, and height). Is remembered.
The operation unit 64 is a switch for starting and stopping the apparatus.

The mechanism drive unit 66 is a circuit for driving each mechanism unit of the packaging machine when packaging is performed. Specifically, the motor 67 drives the elevator, the pusher conveyor carry-in motor 68 carries the packaged goods, Film transfer motor 69 of the film feed mechanism, left and right folding motor 70 for driving the left and right folding member 7, a rear folding motor 71 for driving the rear folding member 6, a front folding motor 72 for driving the tension roller 9 which is a front folding rotor, and discharging There is a discharge pusher motor 73 for driving the pusher 8 and the like. In addition, description is abbreviate | omitted about the detail of a packaging machine.
Further, the mechanism drive unit 66 includes a product width detection sensor 15a for detecting the width of the package object, a height detection sensor 15b for detecting the height of the package object, and a length detection for detecting the product length. A sensor is connected to supply detection data to the CPU 61.

  A signal notifying that the measurement of the article to be packaged placed on the product placement unit has been stabilized is transmitted from the label issuing sticking unit 40E to the packaging mechanism control unit 102E. Further, as data for determining the label application position from the packaging mechanism control unit 102E to the label issue application unit 40E, one length data (length from the center of the product to the end in the width direction) detected by the width detection sensor 15a. Height data), height data detected by the detection sensor 15b, length (depth) data, and the like are transmitted.

<Label issue pasting part 40E>
The label issuing and pasting unit 40E includes a CPU 31, a ROM 33, a RAM 34, a display operation unit (console unit) 4, a communication interface circuit (INF) 46, a label issuing unit 40, a label pasting unit 41, a pasting drive unit 42, and a transport driving unit. 43, a product detection sensor 59, a weighing unit 50, and the like. Each component is connected via a bus 31d (data communication line) or the like.

  The label issuing unit 40 includes a thermal head (printing unit) 25b, a stepping motor 25c that drives the platen roller 25a, and a cutter as a cutting unit 26 that cuts the label paper 21 'printed by the thermal head 25b. The thermal head (printing unit) 25b, the stepping motor 25c, the cutter as the cutting means 26, and the like are connected to the CPU 31 via the interface 37.

  The ROM 33, RAM 34, and the like store the article size, label size, print items, and the like. Specifically, the ROM 33 stores various control programs executed by the CPU 31. The RAM 34 includes areas such as various registers and flags used when the CPU 31 executes the control program in the ROM 33, and a preset data area in which various data is stored in advance for each product. In the preset data area, products with various product data such as “product name”, “unit price”, “barcode”, etc., which are data for price calculation and label printing, corresponding to the packaged item (product number) are stored. A file, a label format file in which a label printing format is defined, a tray file, and the like are stored.

The display operation unit 4 (console unit) includes an operation input unit 38 including a keyboard and a touch panel, and a display unit 39 configured by a liquid crystal display. The display operation unit 4 (console unit) displays various data and commands, or displays input data, preset data, and various messages based on commands from the CPU 31.
The input of various data related to the pasting of the mountless label L in the present invention can be performed by operating the operation unit or the operation input unit 38 of the display operation unit 4.
The weighing unit 50 supplies the CPU 31 with a weighing signal of an article to be packaged placed on the product placement unit.

The communication interface circuit 46 (INF) communicates various data and commands with the packaging mechanism control unit 102E.
The thermal head 25b, the stepping motor 25c, and the cutter as the cutting means 26 constitute the printing unit of the label issuing unit 40, and print the product name, price, unit price, barcode, etc. on the mountless label tape based on the command of the CPU 31. Then, the printed label tape is cut into a sheet by a cutter as the cutting means 26, and the mountless label L is issued to the label issuing port.
The product detection sensor 59 is arranged on the side of the discharge path, slightly before the position where the label adsorbing part is vertically lowered for sticking (close to the packaging part), detects the presence or absence of the package in the discharge path, Generates a signal for labeling. The product detection sensor 59 outputs a message to that effect to the CPU 31 when the package is located at the label application location, that is, the discharge path (heat seal portion).

  The transport driving unit 43 includes a transport motor that drives the transport conveyor (transport means 1), and drives or stops driving the transport motor under the control of the CPU 31.

  The CPU 31 comprehensively controls each component. The CPU 31 executes a control program (PRG) read from the ROM 32, the RAM 34, or the like, thereby causing the packaging apparatus 100 as a computer to realize each function.

<Operation of packaging apparatus 100>
FIG. 6 is a diagram illustrating an example of the operation of the packaging apparatus 100 according to the embodiment of the present invention. FIG. 7 is a flowchart showing an example of the operation of the packaging apparatus 100 according to the embodiment of the present invention. An example of the operation of the packaging device 100 will be described with reference to FIGS.

In step S <b> 11, the tray is placed on the product placement unit 12. Specifically, the operator (operator) places the article to be packaged w on the product placement unit 12 located at the front of the packaging device 100.
The weighing unit 50 measures the weight of the article to be packaged w placed on the weighing pan of the product placing unit 12, and the control unit 61 receives data indicating the weight of the article to be packaged w measured by the measuring unit 50. get.

In step S <b> 13, the control unit 61 performs a process of transporting the article to be packaged w into the packaging device 100 (infeed start). More specifically, the control unit 61 drives the carry-in motor 68 to rotationally drive the pusher conveyor 13, and performs control to convey the article to be packaged w to the elevator 14 by the pusher conveyor 13.
In addition, during the conveyance of the article to be packaged w by the pusher conveyor 13, the vertical, horizontal, and height dimensions of the article to be packaged w are measured by the detection sensors 15a and 15b, and the control unit 61 is measured by the detection sensors 15a and 15b. Based on the measured value, the feeding length of the film 17a is determined.

  In step S15, the control unit 61 performs film feed control. Specifically, the control unit 61 pulls out the film 17a from the film roll 17 by the film feed mechanism 5 such as the film transfer motor 69, and the film 17a is moved to a predetermined length based on the measured size (dimension) of the packaged object w. Then, the film is cut by a cutter, and the film 17a is centered and stretched.

  In step S <b> 17, the control unit 61 performs control to raise the elevator 14. Specifically, the control unit 61 controls the elevator 14 to move up by driving the elevator motor 67 via the mechanism driving unit 66. As the elevator 14 rises, the stretched film 17a is pushed up from below, and the upper surface of the package is covered with the film 17a.

Specifically, as shown in FIGS. 6A and 6B, the article w to be packaged is placed on the lifting means (elevator 14), and the mechanism driving unit 66 is controlled by the control unit 61. By driving the elevator motor 67 via, the article w to be packaged on the lifting means (elevator 14) is raised toward the film, and as shown in FIG. Covered by the film 17a.
As shown in FIG. 6C, the control unit 61 further drives the elevator motor 67 via the mechanism driving unit 66, thereby further raising the package w on the lifting means (elevator 14). As shown in FIG. 6C, the bottom surface of the article to be packaged (article) is pushed up to a position above the rear folding member 6, the tension roller 9, and the left and right folding members 7 (7a, 7b) to be stationary. .
The rear folding member 6 and the tension roller 9 are disposed at a position where the rear folding member 6 and the tension roller 9 are in contact with the film 17a or at a position slightly separated from the film when the lifting of the article to be packaged w by the lifting means (elevator 14) is completed.
By carrying out like this, the tension | tensile_strength of the film 17a which covers the to-be-packaged object w becomes equal right and left, front and back equal, and it can prevent that excessive force is added to the to-be-packaged object w by the film 17a. Specifically, as shown in FIG. 6 (c), the horizontal distance Lm between the object to be packaged w and the tension roller 9 is such that excessive force is not applied to the object to be packaged w by the film 17a. Is set to

In step S19, the control unit 61 performs control to close the left and right folding members 7 (7a, 7b). Specifically, the control unit 61 drives the left and right folding motor 70 via the mechanism driving unit 66 so as to close the left and right folding members 7 (7a, 7b). The controller 61 is configured so that the left and right folding members 7a and 7b slide in the center direction after the upper surface of the article to be packaged w is covered with the film 17a due to the raising and lowering means (elevator 14). Is folded into the bottom side of the article to be packaged w (see FIGS. 4 and 5).
The article to be packaged w is supported by the left and right folded plates (7a, 7b) by the sliding of the left and right folded plates (7a, 7b), and at the same time, the elevator 14 starts to descend.
Note that the folding of the left and right end portions by sliding the left and right folding plates (7a, 7b) is determined based on the size of the article to be packaged w (flat tray), the adjustment of the tension of the film 17a by the film feed mechanism 5, and the like. The

Next, as shown in FIG. 6D, the control unit 61 performs movement control of the rear folding member 6 in front of step S21 and movement control of the rear by the tension roller 9 in step S23.
Specifically, as shown in FIG. 6 (d), the control unit 61 slides the rear folding member 6 in the horizontal state toward the front by the mechanism driving unit 66 and the rear folding motor 71 so that the rear of the film 17a. While the end portion is folded to the bottom side of the article to be packaged w, the mechanism roller 66 and the front folding motor 72 slide the tension roller 9 in the rearward state in a horizontal state to apply tension to the film 17a. Fold 17a into the bottom side of the article to be packaged w.

Specifically, the rear folding member 6 and the tension roller 9 as the rear folding plate slide between the plates 7 f and 7 g of the left and right folding members 7.
In addition, the tension state of the film at the time of completion of packaging can be varied by changing the opening timing of the side part of the film held by the film feed mechanism 5 as the rear folding member 6 slides.
In addition, it is preferable to perform control of step S21 and step S23 by the said control part 61 by simultaneous parallel processing.

  In step S25, the control unit 61 performs control to drive the discharge pusher. Specifically, following the sliding of the rear folding member 6, the discharge pusher 8 is activated, and the packaged object w in which the left and right end portions and the rear end portion of the film 17 a are folded toward the bottom side is directed toward the heater portion 10. Extrude. The push-out by the discharge pusher 8 is such that the central pusher 8a protrudes forward from the left and right pushers 8b and 8c located on the left and right sides, and the central pusher is formed by a front downward inclined plate, and at the rear of the inclined plate. Since the presser piece projects forward and upward and is formed in a substantially square shape on the side surface, the rear end portion of the article to be packaged w rides along the inclined plate of the central pusher 8a, and the climbing of the presser piece (not shown) ), It is always pushed out in a constant posture). By this extrusion, the front end portion of the film 17a is further folded to the bottom side of the article to be packaged w by the tension roller 9 which is a front folding roller.

  In step S <b> 27, the control unit 61 applies the discharge pusher 8 to the heater unit 10 after the left and right end portions, the rear end portion, and the front end portion of the film 17 a that covers the upper surface of the package item w are folded to the bottom side. When passing through the heater portion 10, the end portion of the folded film 17a is heated and brought into close contact. And it is discharged | emitted from the heater part 10 to the discharge means.

  In the packaging device 100 of the above embodiment, the left and right folding members 7a and 7b are composed of two upper and lower plates 7f and 7g, and the rear folding member 6 and the tension roller 9 can slide between the upper and lower plates. Although it is an arrangement which is arranged, it is not restricted to this form. For example, the packaging device 100 may have a configuration in which the left and right folding plates are configured as a single plate, and the rear folding member 6 and the tension roller 9 are slidably disposed below or above the left and right folding plates.

As described above, the packaging apparatus 100 according to the embodiment of the present invention is an elevator that lifts the packaged item w from below the film 17a with respect to the film 17a horizontally stretched on the packaging unit 16. 14, the upper surface of the article to be packaged w is covered with a film 17a, and the film 17a is folded into the bottom side of the article to be packaged w to wrap the article to be packaged w.
In addition, the packaging device 100 includes a pair of film feed mechanisms 5 that sandwich both side edges in the width direction of the film 17a and stretches around the packaging unit 16, and an object to be packaged w in the horizontal direction above the film feed mechanism 5. A pair of first folding member (rear folding member 6) and second folding member (tension roller 9), rear folding member 6 and tension roller 9 are moved with a predetermined interval larger than the size of A folding member driving section (a rear folding motor 71, a front folding motor 72, a mechanism driving section 66, etc.) and a control section 61.
The controller 61 passes the article to be packaged w from the lower side of the film 17a stretched by the film feed mechanism 5 by the elevator 14 between the rear folding member 6 and the tension roller 9, and then the folding member 6 and the tension roller. In the state of being pushed up higher than 9, the folding member driving section passes the rear folding member 6 through the vicinity of the bottom surface portion of the packaged object w, and the folding end position in the vicinity of the end of the packaged object w on the tension roller 9 side. And the tension roller 9 is moved horizontally toward the rear folding member 6 to control the film 17a to be folded into the bottom surface side of the packaged object w while applying tension to the film 17a.
By doing so, it is possible to provide the packaging apparatus 100 that can be packaged satisfactorily in a state where the tension is applied to the film 17a by the tension roller 9.

  In addition, in the packaging device 100 according to the embodiment of the present invention, after completion of the push-up of the article w to be wrapped by the elevator 14 as the lifting means from below the horizontally stretched film 17a, the first folding member The folding member 6 and the tension roller 9 are disposed at a position where the folding member 6 and the tension roller 9 are in contact with the film 17a or slightly away from the film 17a. The control unit 61 moves the rear folding member 6 and the tension roller 9 to the folding end position by the folding member driving unit (back folding motor 71, front folding motor 72, mechanism driving unit 66, etc.), so that the film 17a. Is controlled to be folded into the bottom surface side of the article to be packaged w.

In this way, when the article to be packaged is pushed up by the elevator 14, the rear folding member 6 that is the first folding member and the tension roller 9 are arranged at a position where they contact the film 17a or slightly away from the film 17a. Therefore, an excessive force is not applied to the end portion of the article to be packaged w such as the tray, and the article to be packaged such as the tray can be prevented from being damaged.
Further, when the film 17a is folded, the tension roller 9 is horizontally moved toward the rear folding member 6 to apply tension to the film 17a, and the rear folding member 6 passes through the vicinity of the bottom surface portion of the packaged object w. The film 17a is folded to the bottom surface side of the packaged object w by horizontally moving it to the folding end position near the end of the packaged object w on the tension roller 9 side and moving the tension roller 9 to the folding terminal position. .
That is, even if the packaging device 100 moves the back folding member 6 forward, the tension roller 9 applies tension to the film 17a, and the vicinity of the tension roller 9 side end of the package w Fold it to the bottom side of the article to be wrapped w while moving to the folding end position. For this reason, for example, when the rear folding member 6 moves forward, the article to be packaged w can be prevented from moving forward.
Further, it is possible to prevent the film tension at the end of the tray (end on the side of the tension roller 9) from being reduced when the rear folding member 6 moves forward.

Moreover, the packaging apparatus 100 which concerns on embodiment of this invention is a pair of right-and-left folding members 7 (arranged above the rear folding member 6 that is the first folding member and the tension roller 9 that is the second folding member ( 7a, 7b). The control unit 61 folds the film 17a to the bottom side of the packaged object w by the left and right folding members 7 (7a, 7b) when the lifting of the packaged object w by the lifting means (elevator 14) is completed, and then the rear folding member 6 The tension roller 9 controls the film 17a to be folded on the bottom surface side of the article to be packaged w.
By doing in this way, the packaging apparatus 100 which can package the folding member 6 with the film 17a in a favorable state can be provided.

As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and there are design changes and the like without departing from the gist of the present invention. Is included in the present invention.
Further, the embodiments described in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose and configuration.
Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

As mentioned above, although embodiment of this invention was described, some or all of embodiment of this invention is described as the following additional remarks.
[Appendix 1]
With respect to the film stretched horizontally on the packaging part, the object to be packaged is pushed up by the lifting means from below the film, the upper surface of the object to be packaged is covered with the film, and the film is placed on the bottom side of the object to be packaged. A packaging device for folding and packaging the packaged article,
A pair of film feed mechanisms sandwiching both side edges in the width direction of the film and stretching the packaging portion;
A pair of first and second folding members disposed above the film feed mechanism and at a predetermined interval in the horizontal direction larger than the size of the packaged object,
A folding member drive unit for moving the first folding member and the second folding member;
A control unit,
The control unit, from below the film stretched by the film feed mechanism, passes the article to be packaged by the elevating means between the first folding member and the second folding member, In the state where the first folding member and the second folding member are pushed higher than the first folding member, the folding member driving unit causes the first folding member to pass through the vicinity of the bottom surface of the packaging object. The second folding member is horizontally moved to the folding end position in the vicinity of the end portion on the second folding member side, and the second folding member is horizontally moved toward the first folding member, whereby tension is applied to the film. Control is performed so that the film is folded to the bottom surface side of the package while applying.
[Appendix 2]
When the lifting of the article to be packaged by the lifting means is completed, the first folding member and the second folding member are arranged at a position where they abut against the film, or at a position slightly separated from the film,
The control unit controls the folding of the film to the bottom side of the package by moving the first folding member and the second folding member to the folding end position by the folding member driving unit. The packaging apparatus according to claim 1, wherein:
[Appendix 3]
The first folding member is a rear folding plate;
The packaging apparatus according to appendix 1 or appendix 2, wherein the second folding member is a tension roller.
[Appendix 4]
A pair of left and right folding plates disposed above the first folding member and the second folding member;
The control unit folds the film on the bottom surface side of the package by the left and right folding plates when the lifting of the package by the elevating means is completed, and then uses the first folding member and the second folding member. The packaging apparatus according to any one of appendix 1 to appendix 3, wherein the film is controlled to be folded into a bottom surface side of the article to be packaged.

1 Belt conveyor (conveying means)
1 'Conveyor 4 Display operation unit (touch panel)
DESCRIPTION OF SYMBOLS 5 Film feed mechanism 5a Elastic belt 5b Elastic belt 5c Clamp board 5f, 5g Clamper 6 Back folding member (1st folding member, back folding board)
7 Left and right folding members (left and right folding plates)
8 Discharge pusher
9 Tension roller (front folding roller, second folding member)
DESCRIPTION OF SYMBOLS 10 Heater part 11 Stretch packaging part 11a Machine frame 12 Product mounting part 13 Pusher conveyor 14 Elevator (elevating means)
15a Width detection sensor 15b Height detection sensor 16 Packaging unit 17 Film roll 17a Film 21 Mountless label roll 21 'Label paper 23 Roll loading unit 25 Printing unit 25a Platen roller 25b Thermal head 25c Stepping motor 26 Cutting means 26a Movable blade 26b Fixed Blade 31 Control unit (CPU)
31d bus (data communication line)
33 ROM
34 RAM
37 Interface 38 Operation input section 39 Display section 40 Label issuing section 40E Label issuing pasting section 40a Case 41 Label pasting section (sticking means)
42 sticking drive unit 43 transport drive unit 46 interface circuit 50 weighing unit 51 clamper 52 clamper 59 product detection sensor 61 CPU
61a Bus 62 ROM
63 RAM
64 Operation Unit 65 Communication Interface Circuit 66 Mechanism Drive Unit 67 Elevator Motor (Elevator Drive Unit)
68 Carry-in motor 69 Film transfer motor 70 Left and right folding motor 71 Back folding motor 72 Front folding motor 73 Discharge pusher motor 100 Packaging device 102 Stretch packaging machine 102E Packaging mechanism control unit w Articles (packaged goods, products)

Claims (2)

With respect to the film stretched horizontally on the packaging part, the object to be packaged is pushed up by the lifting means from below the film, the upper surface of the object to be packaged is covered with the film, and the film is placed on the bottom side of the object to be packaged. A packaging device for folding and packaging the packaged article,
A pair of film feed mechanisms sandwiching both side edges in the width direction of the film and stretching the packaging portion;
A pair of first and second folding members disposed above the film feed mechanism and at a predetermined interval in the horizontal direction larger than the size of the packaged object,
A folding member drive unit for moving the first folding member and the second folding member;
A control unit,
The control unit, from below the film stretched by the film feed mechanism, passes the article to be packaged by the elevating means between the first folding member and the second folding member, In the state where the first folding member and the second folding member are pushed higher than the first folding member, the folding member driving unit causes the first folding member to pass through the vicinity of the bottom surface of the packaging object. The second folding member is horizontally moved to the folding end position in the vicinity of the end portion on the second folding member side, and the second folding member is horizontally moved toward the first folding member, whereby tension is applied to the film. Control is performed so that the film is folded to the bottom surface side of the package while applying. When the lifting of the article to be packaged by the lifting means is completed, the first folding member and the second folding member are arranged at a position where they abut against the film, or at a position slightly separated from the film,
The control unit controls the folding of the film to the bottom side of the package by moving the first folding member and the second folding member to the folding end position by the folding member driving unit. The packaging apparatus according to claim 1, wherein:

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