JP5569005B2 - Packaging equipment - Google Patents

Description

  More particularly, the present invention relates to a packaging apparatus, and more particularly, a packaging object is pushed up from below on a film stretched on a packaging part, and a film covering a peripheral surface of the packaging object is folded and packaged on the bottom side of the packaging object. It relates to packaging equipment.

  With respect to the film spread on the packaging part, the tray containing the packaged object is pushed up from below to cover the peripheral surface of the packaged object (tray) with the film, and the peripheral edge of the film is covered with the left and right folding plates and the rear folding plate. There is a packaging device in which packaging is completed by folding the tray to the bottom side and pushing the tray in the ejection direction with a discharge pusher (see, for example, Patent Document 1).

  In the packaging device, the front film facing the discharge side of the film covering the tray is pushed out in the discharge direction by the discharge pusher in which the three-sided (left and right side and rear side) film is folded. Then, the front film is folded into the bottom of the tray by the front folding roller, and finally folded onto the already folded film, and is attached by the heat of the heat sealing device or the self-adhesiveness of the film itself.

  By the way, when the size of the tray (packaged object) is small with respect to the film used for packaging, the film on the discharge side (front side) folded by the extrusion by the discharge pusher may remain long. In that case, the film on the discharge side is folded from the front side to the rear side of the bottom of the tray, and a part of the folded film protrudes rearward from the rear edge.

The tray packaged as described above is not visually pleasing when a part of the folded film protrudes from the bottom area of the tray. The film is folded manually to fit within the bottom area of the tray.
However, folding the protruding film is time consuming and difficult.

  In addition, when the tray is displayed in a showcase without folding the protruding film, another tray may be displayed on the protruding film. In addition, if a tray with the film protruding is picked up by the customer, another tray on the protruding film may move together, and the other tray may be turned over.

JP 2007-30898 A

  The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a packaging device that can prevent a film folded into the bottom of a tray from protruding outside the outer periphery of the bottom of the tray.

In order to achieve the above object, the packaging device of the present invention includes a film roll set in a film roll placement section, sandwiched on both sides in the width direction of the film by a pair of film feed means, drawn out by a predetermined length, cut and packaged. The package is pushed up from below the film spread on the packaging part, the peripheral surface of the package is covered with the film, and the periphery of the film is moved by the left and right folding plates and the rear folding plate. In the packaging apparatus that folds into the bottom of the package after folding the film peripheral edge facing the discharge direction into the bottom of the package and then folding into the bottom of the package after the film folded by the movement of the post-folding plate , the film feed for each film roll A reference value for determining the presence or absence of movement of the means is set, and the measured value is measured by the measuring means for measuring the reference value and the size of the package. Determine the presence or absence of the movement by comparing the value, of the pair of film feed means, the film feed means located on the discharge side of the packaged articles, and movable toward the other of the film feed means side ( Claim 1).
The moving film feed means includes only the film feed means positioned on the package discharge direction side, or the film feed means on the opposite side together with the movement of the film feed means positioned on the package discharge direction side. Either method may be used.

The film feed means located on the opposite side to the discharge direction may include a moving mechanism for stretching in the direction of extending the film width, separately from the movement.
In addition, the packaging apparatus of the present invention has a discharge direction of the packaged object in the same direction as the carry-in direction of the packaged object (front carry-in / pre-discharge), or a carry-in direction and a discharge direction of the packaged object are reversed (front carry-in). -Any form of (post-discharge) may be sufficient.

According to the above means, the film feed means located on the discharge direction side of the article to be packaged is moved to the other film feed means side, that is, toward the center of the packaging part (in the direction of loosening the tension of the film stretched on the packaging part). After the film folded by the movement of the rear folding plate, the film periphery facing the discharge direction of the package is folded at the bottom of the package, so the front half of the film stretched on the packaging When the film is moved rearward with respect to the center of the packaging part, the film covering the front half of the package is reduced, so the amount of folding of the film on the front side that is folded into the bottom of the package by discharging the package Can be reduced compared to the amount of folding without folding.
Therefore, it is possible to prevent the film facing the discharge direction from being folded back to the bottom and protruding outside the bottom to be packaged. In addition, the amount of folding into the bottom portion of the film facing away from the discharging direction becomes longer due to the movement, but the folding of the portion is folded at least before the folding of the film facing in the discharging direction and faces the discharging direction. Since the film is covered with the film, it does not come out on the surface.

  The movement of the film feed means may move both the film feed means located on the discharge direction side of the package and the film feed means located on the opposite side. Specifically, when moving the film feed means located on the discharge direction side of the package toward the other film feed means side, the film feed means on the other side is also located on the discharge direction side. Control is made so as to move away from the feed means (claim 2).

  According to the above means, the other film feed means also moves in a direction away from the film feed means located on the discharge direction side in accordance with the movement of the film feed means located on the discharge direction side of the package. The film stretched on the part is translated in the direction perpendicular to the film transport direction, so that the amount of film in contact with the front half of the package is reliably shortened and finally folded back to the bottom of the package The film can be reliably prevented from protruding from the bottom of the package. The amount of movement of the film feed means on the other side may be the same as or more than the amount of movement of the film feed means located on the discharge direction side of the package.

  Further, the movement of the film feed means is controlled so as to be performed after the film feed is finished and before the article to be packaged comes into contact with the drawn film (Claim 3).

  According to the said means, after a film is conveyed by a packaging part, before a to-be-packaged object contacts this film, by moving a film feed means, it becomes resistance with respect to the film to which a to-be-wrapped object moves. It becomes possible to shift the position of the film with respect to the packaged object with certainty. Thereby, the protrusion of a film can be eliminated reliably.

The film feed means is moved according to the size of the package, for example. Specifically, a measuring unit that measures the size of the packaged object before the packaged object is pushed up toward the film stretched on the packaging unit, and the discharge direction side based on the measurement data by the measuring unit Control means for controlling movement of the film feed means positioned is provided.
The measuring means for measuring the size of the packaged object measures, for example, only the depth dimension of the packaged object (the dimension along the loading direction when the packaged object is loaded into the apparatus) (Claim 5).
In addition, for the movement control based on the measurement data, for example, a reference value for determining the presence / absence of movement is set for each film roll (film width), and the presence / absence of movement is determined by comparing the reference value with the measurement value. .
In addition, when moving, if the measured value is smaller than the reference value, the moving amount is uniformly moved according to a method of moving a certain amount (for example, 10 to 20 mm) or according to the difference of the measured value with respect to the reference value. Any method such as changing the amount in several steps may be used.

  According to the above means, the movement of the film feed means is carried out in the process of carrying in the package to be carried into the packaging device, and the depth dimension of the package to be measured by the measuring means is previously set for each film roll (film width). Compared with the reference value (movement limit value) set in (2), if it is smaller than the reference value, it is moved. Thereby, movement control can be performed stably and quickly.

In the present invention, after a film drawn from a film roll set at a predetermined position (film roll arrangement part) is conveyed to a packaging part, the film feed means on the discharge direction side is changed to a film feed on the opposite side according to the size of the package. The film roll itself set in the film roll placement section is moved in the direction opposite to the discharge direction according to the size of the package, and the film feed means is also moved accordingly. The film may be fed at a position after the movement.
That is, the film drawn from the film roll is cut to a predetermined length, and both side edges in the width direction of the cut film are sandwiched by a pair of film feed means and conveyed to the packaging part, and the film stretched on the packaging part On the other hand, the object to be packaged is pushed up from below, the peripheral surface of the object to be packaged is covered with a film, and the periphery of the film is folded into the bottom of the object to be packaged by moving the left and right folding plates and the rear folding plate, and faces the discharge direction. In the packaging device that folds the film periphery after the film is folded by the movement of the folding plate into the bottom of the package, the film roll set in the film roll placement section is moved in the direction opposite to the discharge direction of the package Adjustable and at least the direction of discharge of the package of the pair of film feed means according to the movement of the film roll Film feed means located and moving freely toward the other film feed means side (claim 6).

  According to the above means, the film roll itself is moved in the direction opposite to the discharge direction of the packaged object, and the film feeding means is also moved in accordance with the movement, so that the film is drawn out and conveyed. Is a position moved to the opposite side from the discharging direction as compared with the position where the film roll is drawn and spread out before the movement. As a result, the amount of folding of the front film is shortened (decreased) and does not protrude outward from the range of the bottom.

The packaging device of the present invention can move the film feeding means positioned at least on the discharge direction side of the packaged object in the central direction of the packaging portion by the configuration according to claim 1, so that the film stretched on the packaging portion can be moved. The front half can be moved rearward with respect to the center of the packaging. As a result, the film in contact with the front half of the package is reduced, so that the amount of folding of the front film that is folded into the bottom of the package by discharging the package is folded without moving. The amount of the film can be reduced compared to the amount, and the film facing the discharge direction folded into the bottom can be prevented from being folded back to the bottom and protruding outside the bottom.
Further, according to the configuration of claim 2, the film stretched on the packaging part moves in parallel in a direction orthogonal to the film transport direction, so that the amount of the film in contact with the front half of the packaged object is ensured. It becomes shorter and it can prevent reliably that the film folded at the end protrudes from the bottom part of a package.

Moreover, according to the structure of Claim 3, it becomes possible to shift | deviate the position of the film with respect to a to-be packaged object reliably. Thereby, the protrusion of a film can be eliminated reliably.
Moreover, according to the structure of Claims 4 and 5, movement control can be performed stably and rapidly.

Further, according to the configuration of claim 6, the film roll itself is moved in the direction opposite to the discharge direction of the article to be packaged, and the film feed means is also moved in accordance with the movement to draw out and convey the film. The film to be stretched is a position moved to the opposite side from the discharge direction as compared with the position where the film is drawn from the film roll position before the movement and spread. As a result, the amount of folding of the front film is shortened (decreased) and does not protrude outward from the range of the bottom .

The longitudinal section side view showing the outline of the packaging device concerning the present invention. FIG. The movement of a film conveyance conveyor is shown, (a) is a top view, (b) is a side view. Explanatory drawing which shows packaging operation | movement. A movement determination file serving as a reference for determining the movement of the film feed means, (a) is a file for determining movement based on the depth dimension of the package, and (b) is a total value of the depth dimension and height dimension of the package. A file to determine movement by. It is explanatory drawing about the positional relationship of the film before to move, a to-be-packaged object, and a film feed means, (a) is a figure which shows the positional relationship of the film at the normal time (before movement), and to-be-packaged object, The figure at the time of completion of normal packaging, (c) is a diagram showing the relationship between the film feed means, the film and the package, (d) is the positional relationship between the film and the package after the film feed means is moved. The figure to show, (e) is a figure at the time of the packaging completion, (f) is a figure which shows the relationship between a film feed means, a film, and a to-be-packaged object. The bottom view which shows the packaging finish before a movement and after a movement. The flowchart figure which shows the flow of a movement of a film conveyance conveyor. The schematic which shows the other example of the packaging apparatus which concerns on this invention.

Hereinafter, an example of an embodiment of a packaging device according to the present invention will be described with reference to the drawings.
The packaging apparatus shown in FIGS. 1 and 2 is a top-wrapping type packaging apparatus, and is provided with a product placing part 2 for placing the article W to be packaged in front of the machine frame 1 and placed on the product placing part 2. The package (tray) W is transported to the elevator 4 provided inside the machine frame 1 by the product carry-in conveyor 3. A packaging part 5 is provided above the elevator 4, and a film roll 7 fed out from a film roll placement part 6 and a film roll 7 set in the film roll placement part 6 on the side (upstream side) of the packaging part 5. A film holding means 8 for holding the tip of the film is provided, a pair of film feed means 9 (for the object to be packaged) for holding and pulling out the film held by the film holding means 8 and conveying it to the packaging part 5 (Film feed means on the discharge direction side), 9 '(film feed means on the opposite side to the discharge direction side of the package: the other film feed means) is disposed close to the tip of the film holding means and holds the film. Between the means 8 and the film feed means 9, 9 ', the film 7' sandwiched and pulled out by the film feed means 9, 9 'has a predetermined length. Cutter 10 for disconnection is located.
Further, above the film feed means 9, 9 ′, left and right folding plates 11, 11 ′, a rear folding plate 12, and a discharge pusher 13 are disposed above the rear folding plate, and are further positioned forward in the discharging direction. Are provided with a front folding roller 17 that folds the front film facing the discharge direction into the bottom of the package, and a heat conveyor 18 that heat-seals the film folded into the bottom.

Measurement for measuring the depth dimension (D) and the height dimension (H) along the conveyance direction of the article W to be packaged conveyed by the commodity carry-in conveyor 3 on the side of the conveyance path of the commodity carry-in conveyor 3. Means 14 are installed. The measuring means 14 is composed of an optical sensor.
The measurement means 14 outputs the measurement value of the article W to be controlled to a control means described later, and the control means controls the movement of the film feed means 9 based on the measurement value. Control of movement of the film feed means 9 will be described later.

The film holding means 8 sandwiches and holds both sides in the width direction of the film 7 ′ drawn out from the film roll 7 set in the film roll arrangement part 6, and as shown in FIG. The film receiving member 8a is arranged on the lower side, and the pressing member 8b presses the film 7 'supported on the surface of the film receiving member 8a against the film receiving member 8a. The film receiving member 8a and the pressing member The holding means composed of 8b is arranged on the left and right sides with an interval corresponding to the interval of the film width.
The film receiving member 8a is fixed to an endless belt 8c driven and rotated by a motor.
Thus, the forward end of the film 7 ′ held by the film receiving member 8a and the pressing member 8b is moved and transferred to the film feed means 9, 9 ′ described later by the forward rotation of the endless belt 8c. In addition, you may comprise the film holding means 8 so that one or both of a holding means can be moved to the width direction according to a film width so that it can respond | correspond to the film roll 7 set to the film roll arrangement | positioning part 6. FIG.

The film feed means 9 and 9 ′ include a pair of upper and lower endless elastic belts 9a and 9a ′ sandwiching the side edge in the width direction of the film 7 ′, and the lower elastic belt 9a ′ on the upper elastic belt 9a side. The clamp plate 9b is in pressure contact with the lower elastic belt 9a ′, and the presser belt 9c is placed on the upper surface of the lower end of the elastic belt 9a ′. The distance between the front and rear film feed means 9 and 9 ′ is the same as the distance between the pair of front and rear holding means constituting the film holding means 8.
The pair of front and rear structural members are supported by mounting frames 15 and 15 ', respectively, and the mounting frames 15 and 15' are arranged at two angles at right angles below the mounting frames 15 and 15 '. An attachment frame 15 ′, which is supported on the guide rods 16, 16 ′ via a connecting member, and attached with feed means 9 ′ on the opposite side to the discharge direction of the package W, and on the discharge direction side of the package W The attachment frame 15 to which the feed means 9 is attached is configured to be movable along the guide rods 16 and 16 ', and a movement means (for example, a stepping motor) is connected to both of the feed means 9 and 9' so that both The feed means 9 and 9 'are configured to be able to move in a direction opposite to the discharge direction of the article to be packaged (see FIG. 3).

  The pair of upper and lower endless elastic belts 9a and 9a 'constituting the film feed means 9 and 9' are driven and rotated in the same direction so that the film 7 'can be held and conveyed, and the drive system is a motor with a speed reducer. In FIG. 17, the drive roller 9 d ′ around which the lower elastic belt 9 a ′ is wound is rotated, and a chain sprocket (not shown) fixed to the shaft of the drive roller 9 d and the upper elastic belt 9 a are wound. The chain is wound around a chain sprocket (not shown) fixed to the shaft of the driving roller 9d to transmit power, and the upper elastic belt 9a is also rotated.

  The clamp plate 9b that presses the lower elastic belt 9a 'against the upper elastic belt 9a is divided into a plurality of pieces (five in the illustrated example), and the clamp plate 9b is elastically lowered by an electromagnetic solenoid or the like. The belt 9a 'is configured to be freely contacted and separated.

Next, as shown in FIG. 3, an example will be described in which the film feed means 9 and 9 ′ move in the same amount in the direction opposite to the discharge direction of the package.
Since the determination as to whether or not to move the film feed means 9, 9 ′ from the initial position in the direction opposite to the discharge direction of the package is made based on the size of the package W, the control means includes the measurement means. A movement determination file (see FIG. 5) in which a reference value to be compared with the depth dimension (D) of the article W to be packaged obtained at 14 is set is stored. The table shown in FIG. 5A is a movement determination file in which it is set to move the film feed means 9 and 9 ′ according to the depth dimension of the tray to be used. “1” is set as a flag indicating “”, and the reference value is set for each width (film width) of the film roll to be used.

For example, in the case of the movement determination file shown in FIG. 5A, if the film width used is 350 mm and the depth dimension (D) of the package W is 100 mm or less, the film feed means 9 and 9 ′ are the same. It is an example in the case where it is set to move in the same amount and the same direction at the timing (the direction opposite to the discharge direction of the article to be packaged: the film 7 ′ stretched on the packaging part 5 is translated to the back side of the apparatus). .
Specifically, the movement and packaging of the film feed means 9 and 9 ′ will be described with reference to FIG. 6. FIG. 6 (a) shows a depth dimension (D) of 90 mm and a height dimension (H) of 20 mm. It is a figure which shows the relationship of the length of the to-be-packaged object (tray) W in which goods W 'were accommodated in the tray of this, and the film whose film width to be used is 350 mm, and is abbreviation of film 7' stretched in the packaging part The elevator 4 is arranged at a position where the article to be packaged W is pushed up in the center, and the elevator 4 is always configured to move up and down a certain position, and the article to be wrapped W is pushed up to the center of the film 7 ′. This is an example.

Then, in the case of the packaged object (tray) W and the film width shown in FIG. 6A, the packaged object W is pushed up in the center of the film 7 ′ having a width of 350 mm, and the packaging operation shown in FIG. ), The periphery of the package W is wrapped with a film 7 ', and the bottom of the package W is wrapped with the film 7' hanging around the package W. Since the film 7'b facing in the discharge direction is folded into the bottom of the package W after the film 7'a wrapping the back side of the package W, the leading portion of the film 7'b is the package W protrudes 20 mm from the bottom periphery of W and is packaged. FIG. 7A shows the package (tray) W as viewed from the bottom at this time, and the film protrudes only from the portion F.
The tip of the film 7′a also protrudes 20 mm from the periphery of the bottom on the discharge direction side of the package W, but since the film 7′a is covered with the film 7′b, the film 7′a does not appear on the surface.
FIG. 6C shows the positional relationship between the film feed means 9, 9 ′ and the film 7 ′ to be pushed up at this time.
Then, in order to correct the state in which the film 7'b protrudes 20 mm from the bottom edge of the package W as described above, the film feed means 9, 9 'are moved. FIG. 6D is a diagram showing the positional relationship between the stretched film 7 ′ after movement and the article W to be packaged.

FIG. 6D shows the film 7 stretched on the packaging part 5 by moving the film feed means 9, 9 ′ by 20 mm in the direction opposite to the discharge direction of the packaged object W (right direction in the drawing). This is an example of translating 'to the back side of the apparatus, and shows the position of the film 7' and the position of the article W to be packaged. FIG. 7 is a diagram showing an example in which the left side of the stretched film 7 ′ in FIG. 6D is translated to the right side by 20 mm.
The elevator 4 always moves up and down at a fixed position, but the position of the film 7 'stretched above the elevator 4 is moved to the right in the figure. In this case, the illustrated example is an example when the film 7 ′ is moved 20 mm to the right. The center of the film 7 ′ is shifted to the right with respect to the center of the package W, and the film 7 with respect to the center of the package W is displayed. The amount (length) of film in the front-rear direction will be different.
In this case, the length (7′b) from the upper peripheral edge of the package W to the front end of the film 7 ′ is 110 mm, and the length dimension obtained by adding the depth dimension and the height dimension of the package W is Since it becomes 110 mm, when the front side portion of the film 7 ′ is folded into the bottom of the package W as shown in FIG. 6 (e), the film portion does not protrude from the bottom edge of the package W. FIG. 7B shows the package (tray) W as viewed from the bottom at this time, and the film does not protrude. The rear portion of the film 7 ′ is 20 mm longer than before the movement of the film feeding means 9, 9 ′. However, since the film portion is covered with the front film portion as described above, the rear film portion. Does not protrude from the bottom edge of the article W.

And the figure which shows the relationship between the film feed means 9 and 9 'at this time, film 7', and the to-be-packaged object W pushed up is FIG.6 (f). Compared with FIG. 6 (c) showing the relationship between the film feed means 9, 9 ′ before the movement of the film feed means 9, 9 ′ and the film 7 ′, the film 7 ′ stretched on the packaging part 5 is held. The film feed means 9 and 9 'move 20 mm to the right side of the figure (the direction opposite to the direction in which the package is discharged).
That is, the front film gripped by the film feed means 9 is formed between the front folding roller 17 that folds into the bottom of the package W and the upper peripheral edge of the package W as the package W moves in the discharge direction. Although the distance does not change, the distance between the front folding roller 17 and the film feed means 9 is shortened.
In this way, the film that is folded by the movement of the rear folding plate is first folded at the bottom of the package W, and then the film peripheral edge facing the discharge direction is covered with the package W so as to cover the folded film. Since the film on the front side of the article to be packaged is reduced, the amount protruding from the bottom of the article to be packaged W can be eliminated.
That is, by moving the film feed means 9 and 9 ′, which are film stretching means, the positional relationship between the object to be pushed up and the film stretched on the packaging part is changed (shifted), thereby Since the amount of the film that is folded into the bottom of the package changes, the amount that protrudes from the bottom of the package W can be eliminated.

As described above, as shown in FIG. 5 (a), by detecting the depth dimension (D) of the article to be packaged (tray) W, the film feed means 9, 9 ′ are moved according to the depth dimension (D). However, the present invention is not limited to this, and the height dimension (H) is added to the depth dimension (D) of the article to be packaged (tray) W as in the movement determination file shown in FIG. It may be determined whether or not to move the film feed means 9, 9 ′ based on the measured dimensions.
FIG. 5B shows the case where the width (film width) of the used film roll is 350 mm and the total value obtained by adding the height dimension (H) to the depth dimension (D) of the packaged object (tray) W is 120 mm or less. Is an example in which the film feed means 9 and 9 'are moved. Therefore, as shown in FIG. 6A, the width of the film roll to be used is 350 mm, and the height dimension (D) of the packaged object W is set to the height dimension (D). Since the total value obtained by adding H) is 110 mm, the film feed means 9 and 9 'are determined to move.

  As described above, by moving the film feed means 9 and 9 'by the same amount in the direction opposite to the discharge direction of the article W, the film 7' stretched on the packaging unit 5 is parallel to the back side of the apparatus. Since the position of the film 7 ′ which is moved and can be expanded on the packaging part 5 with respect to the article W to be packaged pushed up by the elevator 4 can be changed, the front film part facing the discharge direction of the article is It fits in the range of the bottom part of the to-be-packaged object W, and does not protrude outside from the periphery of the bottom part.

  The example in which both the film feed means 9 and 9 'are moved by the same amount has been described above. That is, although the example in which the film 7 ′ spread on the packaging unit 5 moves in parallel to the back side of the apparatus (the direction opposite to the discharge direction of the package object) is shown, the present invention is not limited thereto, and the discharge of the package object W is performed. Only the film feed means 9 located on the direction side may be moved in the direction opposite to the discharge direction of the packaged article W (the film feed means 9 ′ side). In this case, the tension of the film 7 ′ spread on the packaging unit 5 is in a relaxed state, but, similar to FIG. 6 (f), from the front folding roller 17 to the film end held by the film feed means 9. The distance can be shortened. Thereby, the length from the center of the article to be packaged W to the end of the film on the front side can be reduced (shortened), and the film part on the front side that is finally folded into the bottom of the article to be packaged W is the article to be packaged. It fits in the range of the bottom of W, and there is no protrusion outside from the periphery of the bottom.

In the above example, the example in which the packaged object W is pushed up substantially at the center of the film 7 ′ spread on the packaging unit 5 is not limited to this example. Depending on the size of the film 7 ′, it is not at the approximate center of the film 7 ′, but on the configuration of the packaging device, a position shifted to the discharge side of the package W (position close to the film feed means 9), or the film feed means 9 ′ The apparatus may be configured to push up the article to be packaged W on the film 7 ′ spread at a position close to the side.
That is, even when the position where the packaged object (tray) W is pushed up is deviated from the approximate center of the film, the film feed means 9 and 9 'are moved to the back side of the apparatus as in the above embodiment. Thus, since the position of the film stretched on the packaging part 5 with respect to the package W is shifted to the back side, the amount (length) of the film covering the front half of the package W is reduced. Can do.
In the above example, the film feed means 9 and 9 ′ are moved by the same amount. However, the amount of movement of the film feed means 9 ′ is not the same, but is moved more than the movement amount of the film feed means 9. The film 7 'may be stretched.

Next, the packaging operation by the movement of the film feed means will be described based on the flowchart of FIG. The flowchart shows the movement of the feed means related to the present invention, and the other is omitted.
ST1: The depth dimension (D) (or the depth dimension (D) and the height dimension (H)) of the article to be packaged W until the article to be packaged W is conveyed to the elevator 4 by the product carry-in conveyor 3. Is measured. Then, the measurement data is transmitted to the control means.
ST2 ... Based on the size data of the article W to be packaged, the film 7 'is the film feed means 9,
A predetermined length is fed by 9 ′ and spread on the packaging part (see FIG. 4A).
ST3 ... The control means determines whether the depth dimension (D) of the article W is shorter than the reference value set in the movement determination file (see FIG. 6A). If the depth dimension (D) of the package W is short (YES), the process proceeds to ST4, and if the depth dimension (D) of the package W is long (NO), the process proceeds to ST5. Moreover, when judging by the total value of the depth dimension (D) and height dimension (H) of the to-be-packaged object W, it judges compared with FIG.6 (b).
ST4 ... The film feed means 9 positioned on the discharge direction side of the article W to be packaged is moved to the film feed means 9 'side by a predetermined amount. At this time, the other film feed means 9
'May remain fixed or may be translated in the direction of movement of the film feed means 9 by the amount of movement of the film feed means 9. If the other film feed means 9 ′ is fixed without moving, the tension of the film stretched on the packaging part becomes loose. ST 5. It is pushed up by the film 7 ′ spread on the part 5 (see FIG. 4B).
ST6: The end of the film covering the peripheral surface of the package W is folded into the bottom of the package W by the left and right folding plates 11, 11 'and the rear folding plate 12, and the discharge pusher 13
The front film portion F facing in the discharging direction is folded and discharged to the bottom side (see FIGS. 4C, 4D, 4E, and 4F).
In addition, since the movement of the film feed means 9 in ST4 is before the elevator 4 is lifted (or before the packaging object W comes into contact with the film 7 '), the film 7' and the packaging object W come into contact with each other and the film 7 'proceeds. Without being hindered, the film 7 ′ spread on the packaging part 5 can be reliably moved.

Although the said Example showed the packaging apparatus of the structure which moves the film feed means 9 and 9 'or one (film feed means of the discharge direction side of a packaged article) 9 according to the size of the packaged article W, By moving the film roll 7 itself according to the size of the article to be packaged W, the position of the film 7 ′ with respect to the article to be packaged W is shifted so that the amount of protrusion of the film at the bottom of the article to be packaged W is eliminated. Good.
For example, as shown in FIG. 9, the film roll 7 set in the film roll placement unit 6 is movable along the roll axis 17 from the position indicated by the solid line to the position indicated by the two-dot broken line. The moving method may be either an electric system using a motor or the like, or manual movement.
The film feed means 9 and 9 ′ are also moved in accordance with the movement of the film roll 7. However, when there is a large amount of pinching between the upper and lower elastic belts of the film feed means 9 and 9 ′, the film feed means 9 and 9 ′ One or both movements are not required. For example, with respect to the film drawn out from the film roll set at the initial position, the holding position by the film feed means 9, 9 ′ is inside the side edge of the film width, and the film roll 7 is moved in the direction of the film feed means 9 ′ by a predetermined amount. When the side edge of the film width after the movement can be sandwiched between the film feed means 9 and 9 'at the initial position, the movement of the film feed means 9 and 9' is unnecessary.

According to the packaging apparatus having the above-described configuration, before the packaging operation is started, information in which the size of the article to be packaged (tray) W and the film width of the film roll 7 used for packaging is read, and the film roll 7 is determined based on the information. Is moved a predetermined amount in the direction opposite to the discharge direction of the article to be packaged, and at the moved position, the film feed means 9, 9 ′ feeds and cuts the film 7 ′ by a predetermined amount, and conveys and stretches it to the packaging part. By performing packaging in the same procedure as before, the protrusion of the film on the front side that is finally folded into the bottom of the article to be packaged W can be eliminated or reduced.
In addition, since the position of the film roll is moved before the film is fed, the tension of the film 7 'that occurs when only one of the film feeding means 9 in the previous embodiment is moved does not occur.

The packaging apparatus of the present invention draws a predetermined amount of film from a film roll placed at a fixed position by a pair of film feed means and spreads the film on the packaging part, and moves one or both of the film feed means depending on the size of the package Then, the amount of film covering the surface facing the discharge direction of the article to be packaged is reduced, so that the film end on the front side (the discharge direction side) folded into the bottom of the article to be packaged is behind the article W to be packaged. Since it is packaged later so as to cover the film that wraps the side, it can be packaged without protruding from the bottom of the package.
Further, the packaging device of the present invention moves the film roll disposed at the initial position by a predetermined amount in the direction opposite to the discharge direction of the packaged object according to the size of the packaged object, and a pair of films from the moved position. Since it is made to wrap with the film stretched on the wrapping part with a predetermined amount by the feed means, the amount of film covering the surface facing the discharge direction of the package can be reduced, and thereby the front side folded into the bottom of the package The film end on the (discharge direction side) can be packaged without protruding from the bottom of the article to be packaged.

In addition, the present invention draws a film from a film roll set in a film roll arrangement part, and the drawn and cut film is transferred to a packaging part for packaging an object to be packaged, and the width of the film located in the packaging part A pair of film stretching means for stretching both side edges in the direction, the packaged article is pushed up on the film stretched by the film stretching means, and the peripheral surface of the packaged article is covered with the film, The peripheral edge of the film is folded to the bottom of the package by moving the left and right folding plates and the rear folding plate, and the film peripheral edge facing the discharge direction is placed on the bottom of the package after the film folded by the movement of the rear folding plate. In the folding packaging apparatus, the position of the package to be pushed up with respect to the film stretched on the packaging unit is changed according to the size of the package to be Film tension means may include the moving means for moving the. In the illustrated embodiment, an example in which the film feeding means also serves as the film stretching means has been shown. However, a film stretching means may be provided separately from the film feeding means, and the film stretching means is provided in the packaging portion. Any structure that can spread the transferred film may be used. Further, by moving the pair of film stretching means to the back side of the apparatus (on the opposite side to the discharge direction of the package) on both the discharge direction side and the back side, the discharge direction side folded into the bottom of the package object The film can be reduced. Also, in the case of a problem that the back side film is too long and the bottom of the packaged object is raised, the pair of film stretching means are moved parallel to the discharge direction side to Since the film on the near side of the object (the film facing the discharge direction side) becomes longer by that amount, the swell can be eliminated.
Thus, the film stretched by changing the position of the film stretching means and the packaged object so that the packaged object is pushed up and the position where the film is in contact with the film is changed. Therefore, the amount of the film that is wrapped with the film and folded into the bottom of the packaged object can be controlled.

The packaging device of the present invention is not limited to the illustrated embodiment, and can be appropriately changed without changing the gist of the present invention.
(1) In the embodiment, the example in which the movement of the feed unit 9 is performed by the motor drive is shown, but the present invention is not limited to this, and the feed unit 9 may be moved manually.
(2) In the embodiment, the packaging device in the form in which the delivery of the packaged article and the discharge of the packaged packaged article are performed in the same direction (the front side of the apparatus) is not limited thereto, It may be a packaging device that carries in from the front side of the device and discharges the packaged articles from the rear side of the device.
(3) In the embodiment, the example in which the size of the package to be a basis for determining whether to move the feed unit is measured in the process of carrying the package is not limited to this. A tray size may be set in the product file in which the information on the package is set and registered, and the determination may be made based on the tray size.
(4) In the embodiment, an example in which the feed unit moves by a certain amount has been shown. However, the present invention is not limited to this. For example, the amount of movement may be changed depending on the size. (5) In the embodiment, the feed unit is moved. Although an example is shown in which the determination (ST3) of whether or not to be performed is performed after the film feed (ST2), the determination is not limited thereto, and the determination time may be determined at the same time when the depth dimension is detected in ST1.

5 ... packaging part 6 ... film roll arrangement part
7 ... Film roll 7 '... Film 9, 9' ... Film feed means (film stretching means)
11, 11 '... left and right folding plate 12 ... rear folding plate 13 ... discharge pusher 14 ... measuring means
W ... Packaged item F ... Film part folded at the end

Claims (6)

The film roll set on the film roll placement part is sandwiched by a pair of film feed means on both sides in the width direction of the film, pulled out for a predetermined length, cut and transported to the packaging part, and the film stretched on the packaging part The film is pushed up from below, the peripheral surface of the package is covered with a film, the periphery of the film is folded into the bottom of the package by moving the left and right folding plates and the rear folding plate, and the film faces the discharge direction In the packaging device for folding the periphery into the bottom of the article to be packaged after the film folded by the movement of the rear folding plate,
For each film roll, a reference value for determining whether or not the film feed means moves is set, and the reference value and the measured value measured by the measuring means for measuring the size of the package are compared. Determine the presence or absence,
A packaging apparatus characterized in that, among the pair of film feed means, the film feed means located on the side of the package to be discharged is movable toward the other film feed means.   When moving the film feed means located on the discharge direction side of the package toward the other film feed means side, the other film feed means is also away from the film feed means located on the discharge direction side. The packaging apparatus according to claim 1, wherein the packaging apparatus is controlled so as to move. Before SL movement of the film feed means, the film feed completion later, the packaging apparatus according to claim 1 or 2, wherein the packaged product is characterized by controlling so performed prior to contact with the drawn-out film. Packaging device according to any one of claims 1 to 3, characterized in that it comprises a control means for controlling the movement of the film feed means located on the discharge direction based on the measurement value by the pre-Symbol meter measuring means.   5. The packaging apparatus according to claim 4, wherein the measuring unit measures a depth dimension of the article to be packaged, and the control unit controls movement based on the depth dimension. The film roll set on the film roll placement part is sandwiched by a pair of film feed means on both sides in the width direction of the film, pulled out for a predetermined length, cut and transported to the packaging part, and the film stretched on the packaging part The film is pushed up from below, the peripheral surface of the package is covered with a film, the periphery of the film is folded into the bottom of the package by moving the left and right folding plates and the rear folding plate, and the film faces the discharge direction In the packaging device for folding the periphery into the bottom of the article to be packaged after the film folded by the movement of the rear folding plate,
The film roll set in the film roll arrangement part can be adjusted to move in the direction opposite to the discharge direction of the object to be packaged, and at least the object to be packaged is discharged from the pair of film feed means according to the movement of the film roll. A packaging apparatus characterized in that a film feed means positioned on the direction side is movable toward the other film feed means side.

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