JP5669445B2 - Packaging equipment - Google Patents

Description

  The present invention relates to a packaging device.

  Stretch wrapping machine that holds products in tension, presses products placed on the tray against the film from below, and folds the periphery of the film to the bottom side of the tray to wrap products with the film However, it is disclosed in, for example, Patent Document 1 below.

JP 2001-97309 A

  According to the stretch wrapping machine disclosed in Patent Document 1, a product on which an article is placed on a tray is packaged with a film. However, due to the recent increase in environmental awareness of consumers, consumers are required to reduce the amount of garbage, so it is desired to realize a packaging form that does not use a tray. If a packaging form that does not use a tray is realized, the cost required for purchasing and managing the tray can be reduced, and it is not necessary to secure a storage place for the tray, which is also beneficial for the manufacturer.

  The present invention has been made in view of such circumstances, and an object of the present invention is to obtain a packaging device capable of packaging an article without using a tray.

The packaging device according to the first aspect of the present invention includes a supply roll for storing a band-shaped packaging material, a collection roll for collecting the packaging material, a placement unit for placing an article to be packaged, and the supply The first part is transported to the sealing part in a state where an article is placed on the first part corresponding to the previous placement part of the series of packaging materials spanned from the roll through the placement part to the collection roll. In addition, the conveyance unit that folds the second part of the packaging material from the first part to the collection roll over the article, leaving the article in the sealing portion, and the overlapped first part and the by sealing a second portion at the edge portions, said sealing portion forming a bag in which the article is accommodated between the first portion and the second portion, said bag body said a cutting means for cutting the strip packaging material, the sealing portion side of the transport unit There are a packaging material of the recovery roll side separated by the cutting means, a bonding means for bonding the supply roll side of the packaging material used in the next packaging, between the supply roll and the mounting section At the timing when the article is placed on the placement unit, the supply of the band-shaped packaging material from the supply roll to the placement unit is prohibited, and the transport unit seals the packaging material. And a switching means for permitting the supply of the band-shaped packaging material from the supply roll to the mounting portion at the timing of transporting to the stop portion .

According to the packaging device according to the first aspect, the transport unit transports the first portion to the sealing portion in a state where the article is placed on the first portion of the belt-shaped packaging material, and leaves the article in the sealing portion. Then, the second part of the packaging material from the first part to the collecting roll is folded over the article . Further, the sealing portion forms a bag body in which articles are accommodated between the first portion and the second portion by sealing the overlapped first portion and second portion with edges. The cutting means cuts the bag from the band-shaped packaging material. Therefore, according to the packaging apparatus which concerns on a 1st aspect, it becomes possible to package articles | goods, without using a tray. As a result, the amount of waste discharged can be reduced for the consumer, and the cost required for the purchase and management of the tray can be reduced for the manufacturer, and it is not necessary to secure a storage location for the tray. And the switching means arrange | positioned between a supply roll and a mounting part can switch the permission and prohibition of supply of the strip | belt-shaped packaging material from a supply roll to a mounting part. Therefore, by setting the switching means to supply disabled state at the timing when the article is placed on the mounting portion by an operator, it is placed on the placing portion the article is pushed forward after loading Occurrence of slack in the band-shaped packaging material due to the above can be avoided in advance.

  The packaging device according to a second aspect of the present invention is characterized in that, in the packaging device according to the first aspect, in particular, the switching means has a packaging material transport roller capable of switching between a rotation permission state and a rotation inhibition state. To do.

  According to the packaging apparatus according to the second aspect, the switching means has the packaging material conveyance roller capable of switching between the rotation permission state and the rotation inhibition state. Therefore, the switching means can be realized with a relatively simple structure.

Packaging device according to the third aspect of the present invention is switched in particular in the packaging device according to the second aspect, at a timing at which the article to the placing part is placed, the packaging material conveyor rollers in rotation inhibiting state It is characterized by that.

According to the packaging device according to the third aspect, at the timing when the article on the mounting portion is placed, packaging material conveying rollers is switched to the rotation inhibiting state. As a result, it is possible to avoid in advance the occurrence of slack in the band-shaped wrapping material due to the article placed on the placement unit being pushed forward after placement.

The packaging device according to a fourth aspect of the present invention is the packaging device according to the second or third aspect, particularly, the packaging material transport roller is configured to transfer the belt-shaped packaging material from the supply roll in a rotation-permitted state. it is characterized in that a freely rotating direction, and its reverse bi supplies the location unit.

According to the packaging device according to the fourth aspect, the packaging material conveyor roller, in rotation enabled state, a rotatable strip packaging material direction and supplies the mounting portion from a supply roll, and in its reverse bi . By being able to rotate in the reverse direction, for example, when the object to be processed is switched from an article with a long length to a short article, the surplus band-shaped packaging material can be returned from the placement section side to the supply roll side. As a result, wasteful packaging material can be avoided.

  According to the present invention, an article can be packaged without using a tray.

It is a perspective view which shows the whole structure of the packaging apparatus which concerns on embodiment of this invention. It is a figure which shows typically the layout of each process part in a packaging apparatus. It is a figure which shows typically the structure of each process part shown in FIG. It is a front view which shows the structure of a film drawing-in unit. It is a side view which shows the structure of a film drawing unit. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a figure which shows the packaging operation | movement of the articles | goods by a sealing part in order of a process. It is a perspective view which shows the state of a film typically. It is a figure which shows typically the sealing location of a film. It is a block diagram which shows a part of function which a control part has. It is a figure which shows a mounting base and a roller. It is a figure which shows a mounting base and a roller. It is a figure which shows a mounting base and a roller. It is a figure which shows a part of external appearance of a packaging apparatus typically. It is a figure which shows typically the accommodation area of a film supply roll in the state which closed the cover. It is a figure which shows a mounting base and a roller. It is a figure which shows a mounting base and a roller. It is a figure which shows the control part with which a packaging apparatus is provided. It is a figure which shows the control part with which a packaging apparatus is provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the element which attached | subjected the same code | symbol in different drawing shall show the same or corresponding element.

  FIG. 1 is a perspective view showing the overall structure of a packaging device 1 according to an embodiment of the present invention. In FIG. 1, the structure of the packaging apparatus 1 is shown with the cover of the apparatus housing removed. The packaging device 1 is installed, for example, in a back yard of a supermarket or the like, and performs each processing of packaging, weighing, and pricing of articles with a single device. However, the weighing process and the pricing process are optional, and it is not always necessary to have a function for performing these processes. The article to be processed is, for example, food such as meat, fish, and vegetables. A display unit 60, an operation unit 61, and a label printer 62 are arranged on the front surface (the surface viewed from the X1 direction in the drawing) of the apparatus housing. The display unit 60 displays various setting information, the weighing result of the article, pricing information according to the weighing value, and the like. The operation unit 61 includes a numeric keypad, an operation switch, and the like, and an operator can input various setting information by operating the operation unit 61. From the label printer 62, a label in which the measured value of the article, pricing information, and the like are written is output for each article.

  FIG. 2 is a diagram schematically showing the layout of each processing unit in the packaging apparatus 1. The packaging device 1 is disposed in front of the placement unit 2, the sealing unit 3 disposed behind the placement unit 2, the weighing unit 4 disposed beside the sealing unit 3, and the weighing unit 4. And a discharge portion 5. Further, a retracting portion 6 is disposed between the placing portion 2 and the sealing portion 3. In the placement unit 2, an article to be processed is placed on a film by an operator. The article placed on the placement unit 2 is conveyed to the sealing unit 3 together with the film along the X1 direction in the drawing as indicated by an arrow L1. In the sealing part 3, an article is packaged using a film. The drawing section 6 stocks a predetermined amount of film by drawing the film downward. The article after packaging by the sealing unit 3 is conveyed to the weighing unit 4 along the Y direction in the drawing as indicated by an arrow L2. In the weighing unit 4, the goods are weighed. The article is conveyed along the X2 direction in the drawing as indicated by an arrow L3 and discharged from the discharge unit 5. The placement unit 2 and the discharge unit 5 are arranged side by side at substantially the same height of the apparatus housing.

  FIG. 3 is a diagram schematically showing the configuration of each processing unit shown in FIG. The mounting unit 2 includes a mounting table 10 and a roller 11C. The sealing unit 3 includes a transport unit 14, seal units 15L, 16L, and 17L, and a seal height adjustment unit 18. The seal height adjusting unit 18 has a function as a belt conveyor, and conveys articles in the Y direction in the drawing as indicated by an arrow M1. A plurality of rollers 19 are arranged side by side between the sealing unit 3 and the measuring unit 4. The weighing unit 4 includes a belt conveyor 20 and measures the weight of the article by a weighing unit such as a load cell while conveying the article in the X2 direction in the drawing as indicated by an arrow M2. The discharge unit 5 has a discharge table 21 in which a plurality of rollers are arranged. In addition, the drawing portion 6 includes rollers 13A and 13B and a film drawing unit 12 disposed between the rollers 13A and 13B. As shown in FIG. 1, the mounting table 10 and the discharge table 21 are arranged side by side at substantially the same height of the apparatus housing.

  4 and 5 are a front view and a side view showing the structure of the film drawing unit 12. As shown in FIGS. 4 and 5, the film drawing unit 12 includes rollers 12U and 12L and a pair of side plates 12S. The roller 12 </ b> U is attached between the upper ends of the pair of side plates 12, and the roller 12 </ b> L is attached between the lower ends of the pair of side plates 12. Thereby, a space through which the article 100 can pass is provided between the rollers 12U and 12L. Similarly, the transport unit 14 has a structure in which rollers 14U and 14L are respectively attached between the upper end portions and the lower end portions of the pair of side plates.

  6-16 is a figure which shows the packaging operation | movement of the articles | goods by the sealing part 3 in order of a process. The sealing unit 3 includes an upper seal unit 70U and a lower seal unit 70L. The upper seal unit 70U includes seal portions 15U, 16U, and 17U, a cutter 32, a roller 31, and a pressing member 25 such as a sponge. The seal portions 15U, 16U, and 17U are provided corresponding to the seal portions 15L, 16L, and 17L shown in FIG. The cutter 32 is provided in parallel to the seal portions 15U and 16U in the gap between the seal portions 15U and 16U. The upper seal unit 70U can be driven in the vertical direction (Z1 direction and Z2 direction in the drawing) by a drive mechanism (not shown). The seal height adjusting unit 18 can be driven in the vertical direction by a driving mechanism (not shown), and the film drawing unit 12 can also be driven in the vertical direction by a driving mechanism (not shown). Further, the transport unit 14 can be driven in the front-rear direction (X1 direction and X2 direction in the drawing) by a drive mechanism (not shown).

  In the standby state shown in FIG. 6, the film drawing unit 12 is driven downward, and the transport unit 14 is driven forward (that is, when viewed from the front of the apparatus housing). As shown by the thick broken line in the drawing, the belt-like transparent film 50 as the packaging material is a film supply roll 30 → tension roller 11A → shaft 11B → roller 11C → the upper surface of the mounting table 10 → roller 13A → roller 12U → roller 13B. It is bridged by a path that contacts in the order of roller 14L → roller 14U → roller 33 → film recovery roll 34.

  Next, referring to FIG. 7, the worker places article 100 to be processed on film 50 on placement table 10. In packaging apparatus 1 according to the present embodiment, article 100 can be placed directly on film 50 without using a tray. However, the use of the tray is not necessarily prohibited, and the tray on which the article is placed can be placed on the placement table 10.

  Next, referring to FIG. 8, the film drawing unit 12 is driven upward until the roller 12L is aligned with the rollers 13A and 13B in the same plane. In conjunction with this, the transport unit 14 is driven rearward (that is, when viewed from the front of the apparatus casing). The transport unit 14 advances toward the back in the space between the upper seal unit 70U and the lower seal unit 70L. At this time, the rotation of the film collection roll 34 is stopped, and the film supply roll 30 supplies the film 50 by a necessary amount. Thereby, the film 50 is conveyed as the conveyance unit 14 advances, and accordingly, the article 100 placed on the film 50 passes from the placement table 10 through the space between the rollers 12U and 12L. Then, it is conveyed onto the seal height adjusting unit 18.

  Next, referring to FIG. 9, the film drawing unit 12 is driven downward. At this time, the rotation of the film collection roll 34 is stopped, and the film supply roll 30 supplies the film 50 by a necessary amount. Thereby, a part of the film 50 used in the next packaging process is stocked in the drawing-in part 6.

  Next, referring to FIG. 10, the seal height adjustment unit 18 is driven downward by a predetermined amount corresponding to the thickness of the article 100. The seal height adjusting unit 18 is driven downward to a position where the heights of the upper surfaces of the seal portions 15L, 16L, and 17L are substantially equal to the height of the center of the article 100 in the thickness direction. However, as long as the relative position between the article 100 and the seal portions 15L, 16L, and 17L can be adjusted, the lower seal unit 70L may be driven upward instead of driving the seal height adjustment unit 18 downward.

  Next, referring to FIGS. 11 and 12, the transport unit 14 is driven forward in a predetermined posture and track that can avoid contact with the article 100. Thereby, the transport unit 14 is discharged from the space between the upper seal unit 70U and the lower seal unit 70L, and returns to the initial position shown in FIG. FIG. 17 is a perspective view schematically showing the state of the film 50. Through the series of operations of the transport unit 14 so far, the second portion 502 in front of the first portion 501 on which the article 100 is placed (the front in the X1 direction in the figure) is placed on the film 50. It looks like it is folded back in the X2 direction in the figure.

  Next, referring to FIG. 13, when upper seal unit 70U is driven downward, film 50 is sandwiched from above and below by seal portions 15U, 16U, 17U and seal portions 15L, 16L, 17L. And the edge parts of the 1st part 501 and the 2nd part 502 are sealed by thermocompression using the heater which seal part 15L, 16L, and 17L has. Thereby, the bag 40 in which the article 100 is accommodated between the first portion 501 and the second portion 502 is formed. At that time, the bag body 40 in which the article 100 is accommodated is sandwiched and held from above and below by the bottom surface of the pressing member 25 and the top surface of the seal height adjusting unit 18. That is, the pressing member 25 and the seal height adjusting unit 18 function as a holding unit that sandwiches and holds the bag body 40 from above and below when performing heat sealing.

  FIG. 18 is a diagram schematically showing a sealing portion of the film 50. The side area AR1 is sealed by the seal portions 17U and 17L, and the mouth area AR2 is sealed by the seal portions 16U and 16L. Thereby, the bag 40 is formed. Note that it is not always necessary to seal the three sides of the bag body 40. For example, the sealing of the area AR2 may be suspended, and only two side portions may be sealed. In this case, since the mouth portion of the bag body 40 is opened, the operator can put a seasoning sachet or the like into the bag body 40 after the bag body 40 is discharged from the packaging device 1.

  Further, the film 50 is cut by the cutter 32 along the line N in the vicinity of the area AR2. At the same time, in order to join the films 50 separated by cutting, the area AR3 in the vicinity of the line N is sealed by the seal portions 15U and 15L. Thereby, the film 50 once separated by cutting is joined again at the joint portion 41.

  Next, referring to FIG. 14, in the state where the bag body 40 is sandwiched from above and below by the pressing member 25 and the seal height adjusting unit 18 (that is, with the holding means holding the bag body 40), the upper seal unit 70U and The seal height adjusting unit 18 is driven upward. Thereby, even if the film 50 at the edge of the bag body 40 is attached to the seal portions 16L and 17L along with the heat sealing, the bag body 40 is held by the holding means from the seal portions 16L and 17L. By being kept away, the film 50 is peeled off from the seal portions 16L and 17L. That is, the upper seal unit 70U (particularly the pressing member 25) and the seal height adjusting unit 18 function as a separating unit that peels off the film 50 attached to the seal portions 16L and 17L.

  Next, referring to FIG. 15, the upper seal unit 70 </ b> U is driven upward to return to the initial position shown in FIG. 6.

  Next, referring to FIG. 16, when the belt conveyor of the seal height adjustment unit 18 is driven, the bag body 40 jumps over the seal portion 17 </ b> L from the seal height adjustment unit 18 and passes through the roller 19. Then, it is conveyed onto the belt conveyor 20 of the weighing unit 4. In addition, the film collection roll 34 is driven to wind up the film 50 by a predetermined amount, whereby the joint portion 41 of the film 50 is collected. Thereafter, the seal height adjusting unit 18 is driven downward to return to the initial position shown in FIG. Thereby, it will be in the standby state of the next packaging operation | movement.

  FIG. 19 is a block diagram illustrating some of the functions of the control unit mounted on the packaging device 1. The control unit includes a setting unit 45 and a storage unit 46. The operator inputs the size (that is, the bag length) of the bag body 40 in the longitudinal direction of the film 50 and the thickness of the article 100 using the operation unit 61 shown in FIG. The input value of the bag length is input to the setting unit 45 as data S1, and the input value of the thickness of the article 100 is input to the setting unit 45 as data S2.

  Based on the data S1, the setting unit 45 draws the film 50 by the film drawing unit 12 (that is, the displacement amount of the film drawing unit 12 from the position shown in FIG. 8 to the position shown in FIG. 9), and the conveyance The conveyance amount of the film 50 by the unit 14 (that is, the displacement amount of the conveyance unit 14 from the position shown in FIG. 7 to the position shown in FIG. 8) is set. The larger the bag length, the larger the pull-in amount and the transport amount, and the smaller the bag length, the smaller the pull-in amount and the transport amount. Specifically, a data table in which the relationship between various bag lengths and appropriate values of the pull-in amount and the conveyance amount corresponding to each bag length is stored in the storage unit 46 in advance, and the setting unit 45 The pull-in amount and the carry amount corresponding to the bag length represented by the data S1 are read from the storage unit 46. The control unit 45 inputs data S <b> 3 relating to the set drawing amount to the driving unit of the film drawing unit 12. Further, the control unit 45 inputs data S <b> 4 related to the set transport amount to the drive unit of the transport unit 14.

  Further, the setting unit 45 drives the seal height adjustment unit 18 based on the data S2 (that is, the displacement amount of the seal height adjustment unit 18 from the position shown in FIG. 9 to the position shown in FIG. 10). Set. The setting unit 45 sets the drive amount of the seal height adjustment unit 18 to a value that is half the thickness of the article 100 represented by the data S2. The control unit 45 inputs data S5 related to the set drive amount to the drive unit of the seal height adjustment unit 18.

<First Example of Roller 11C>
As the rollers 11C, the forward direction (the direction in which the film 50 is fed from the film supply roll 30 side toward the upper surface side of the mounting table 10) and the reverse direction (the direction from the upper surface side of the mounting table 10 toward the film supply roll 30 side) It is possible to use a roller that can rotate in both directions.

  FIG. 20 is a diagram showing the mounting table 10 and the roller 11C1. The roller 11C1 is rotatable in both forward and reverse directions.

<Second Example of Roller 11C>
According to the roller 11C1 shown in FIG. 20, when the article 100 is a lightweight article, the film 50 is unintentionally conveyed in the reverse direction by the weight of the tension roller 11A as indicated by an arrow P1 in FIG. A situation (that is, the backflow of the film 50) may occur.

  Therefore, as the roller 11C, a roller that can rotate only in the forward direction can be used. FIG. 21 is a diagram illustrating the mounting table 10 and the roller 11C2. The roller 11C2 is rotatable only in the forward direction. Thereby, even if the article 100 is a lightweight article, the backflow of the film 50 due to the weight of the tension roller 11A can be avoided.

<Third Example of Roller 11C>
According to the roller 11C2 shown in FIG. 21, after the operator places the article 100 on the placing table 10, the article 100 is moved forward (X1 direction) on the placing table 10 as indicated by an arrow P2 in FIG. In such a case, the film 50 underlying the article 100 may also be displaced forward, and a slack 150 of the film 50 may occur in front of the article 100.

  Therefore, as the roller 11C, a roller that can be switched between a rotation permission state and a rotation inhibition state by a brake mechanism can be used. FIG. 22 is a diagram showing the mounting table 10 and the roller 11C3. The roller 11C3 enters a rotation-inhibited state when the rotation shaft is locked by the brake mechanism, and enters a rotation-permitted state when the rotation shaft is unlocked by the brake mechanism. In the rotation permission state, the roller 11C3 is rotatable in both the forward and reverse directions. Further, a urethane sheet or silicone rubber or the like is attached to the surface of the roller 11C3, whereby a large frictional force is applied between the roller 11C3 and the film 50.

  FIG. 23 is a diagram schematically showing a part of the appearance of the packaging device 1. FIG. 23 illustrates a state where the cover 131 of the accommodation area of the film supply roll 30 is opened. A round bar-shaped shaft 11 </ b> B is attached to the back surface (inner surface) of the cover 131 by a support member 140.

  FIG. 24 is a diagram schematically showing the accommodation area of the film supply roll 30 with the cover 131 closed. When the cover 131 is closed, the film 50 between the roller 11C3 and the tension roller 11A is pushed in the X1 direction by the shaft 11B. Thereby, between the roller 11C and the shaft 11B, the film 50 is bridged diagonally with respect to the vertical direction. As a result, the contact area between the roller 11C3 and the film 50 is increased, and the frictional force between the roller 11C3 and the film 50 is further increased.

  Of all the operation timings of the packaging device 1, the roller 11 </ b> C <b> 3 is set in a rotation-inhibited state at the timing (FIG. 6, 7, 10-14, etc.) when the article 100 is placed on the placement table 10 by the operator. . Since a large frictional force is applied between the roller 11C3 and the film 50, the occurrence of the slack 150 of the film 50 shown in FIG. 21 can be avoided in advance by setting the roller 11C3 to the rotation prohibited state. Is possible.

  Further, the roller 11C3 is rotatable in both the forward direction and the reverse direction in a rotation permission state. Since the rotation in the reverse direction is free, for example, when the object to be processed is switched from the long article 100 to the short article 100, the surplus film 50 is moved from the mounting table 10 side to the film supply roll 30 side. As a result, waste of the film 50 can be avoided.

  Instead of arranging the roller 11C3 that can be set in the rotation prohibited state, for example, the film 50 is sandwiched between the roller 11C and the shaft 11B from the front or back, or the film 50 is pressed against the shaft 11B, for example. By attaching, it is good also as a structure which prohibits that the new film 50 is supplied on the mounting base 10 in article mounting timing. That is, any configuration may be employed as long as the switching unit can switch permission and prohibition of the supply of the film 50 from the film supply roll 30 onto the mounting table 10.

<Fourth Example of Roller 11C>
FIG. 25 is a diagram illustrating the mounting table 10 and the roller 11C3. After the operator places the article 100 on the placing table 10, when the article 100 is forcibly shifted forward on the film 50 as indicated by an arrow P2 in FIG. The film 50 may become dirty along 100 tracks. When the film 50 is soiled, a sealing failure may occur in the subsequent sealing process.

  Therefore, as the roller 11C, it is possible to use a roller that does not have a brake mechanism and can detect the excessive supply length of the film 50 using a rotary encoder or the like. FIG. 26 is a diagram showing the mounting table 10 and the roller 11C4. The roller 11C4 is not equipped with a brake mechanism. Therefore, after the operator places the article 100 on the placing table 10 and then moves the article 100 forward on the placing table 10 as indicated by an arrow P2 in FIG. The formed film 50 is also displaced forward (that is, excessive supply occurs), and a slack 150 of the film 50 is generated in front of the article 100.

  Further, a urethane sheet or silicone rubber or the like is affixed to the surface of the roller 11C4, whereby a large frictional force is applied between the roller 11C4 and the film 50. In addition, as in FIG. 24, the film 50 between the roller 11C4 and the tension roller 11A is pushed in the X1 direction by the shaft 11B, so that the frictional force between the roller 11C4 and the film 50 is further increased. Accordingly, when an excessive supply of the film 50 occurs due to the article 100 being shifted forward, the roller 11C4 rotates in the forward direction accordingly.

  Further, a rotary encoder or the like is mounted on the roller 11C4, and the number of rotations of the roller 11C4 can be detected. And it is possible to detect the surplus supply length of the film 50 by converting a rotation speed into a film length. That is, the roller 11C4 functions as a detection unit that detects the excessive supply length of the film 50.

  FIG. 27 is a diagram illustrating a control unit 300 included in the packaging device 1. Data S10 relating to the surplus supply length of the film 50 is input to the control unit 300 from the roller 11C4. Based on the data S10, the control unit 300 drives the film collection roll 34 with the control signal S11 before the transport unit 14 starts transporting the film 50 (that is, the state shown in FIG. 7). The film 50 having a length to be collected is collected by the film collection roll 34. The slack 150 of the film 50 can be eliminated by collecting the surplus supply length of the film 50. Then, the packaging operation can be appropriately executed by starting the packaging operation after the slack 150 is eliminated.

  FIG. 28 is a diagram illustrating a control unit 301 included in the packaging device 1. Data S10 relating to the surplus supply length of the film 50 is input to the control unit 301 from the roller 11C4. The control unit 301 sets the transport amount of the film 50 by the transport unit 14 based on the data S10, and inputs the transport amount to the driving mechanism of the transport unit 14 as data S12. When the slack 150 of the film 50 does not occur, the control unit 301 sets the transport amount of the film 50 by the transport unit 14 to a predetermined value corresponding to the bag length. On the other hand, when the slack 150 of the film 50 is generated, the transport amount is set to a value larger than the predetermined value according to the surplus supply length. Thereby, the slack 150 of the film 50 can be eliminated.

  As described above, according to the packaging device 1 according to the present embodiment, the transport unit 14 transports the film 50 in the X1 direction with the article 100 placed on the first portion 501 of the film 50, and the X1 direction. The second portion 502 of the film 50 in front of the first portion 501 is folded back in the X2 direction, which is opposite to the X1 direction, beyond the article 100. Further, the seal portions 16U, 16L, 17U, and 17L seal the first portion 501 and the second portion 502 with the edges, so that the article 100 is placed between the first portion 501 and the second portion 502. The accommodated bag 40 is formed, and the cutter 32 cuts the bag 40 from the film 50. Therefore, according to the packaging device 1 according to the present embodiment, the article 100 can be packaged without using a tray. As a result, the amount of waste discharged can be reduced for the consumer, and the cost required for the purchase and management of the tray can be reduced for the manufacturer, and it is not necessary to secure a storage location for the tray.

  Further, the sealing of the mouth portion of the bag body 40 by the seal portions 16U and 16L is performed behind the article 100 in the conveyance direction (X1 direction) of the article 100. Therefore, even if the article 100 travels in the X1 direction on the film 50 after the conveyance is stopped due to the inertia associated with the conveyance, the article 100 moves away from the sealing portion of the mouth portion. It is possible to reduce the possibility of occurrence of intrusion.

  Furthermore, compared to a pillow packaging machine, a former for forming a film into a cylindrical shape is not necessary, and the apparatus can be downsized.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Mounting part 3 Sealing part 4 Weighing part 5 Discharge part 6 Pull-in part 10 Mounting base 11C, 11C1-11C4 Roller 12 Film drawing unit 14 Conveyance unit 15U, 15L, 16U, 16L, 17U, 17L Seal part 18 Seal height adjustment unit 21 Discharge base 25 Holding member 30 Film supply roll 32 Cutter 34 Film recovery roll 40 Bag body 41 Joining location 45 Setting part 50 Film 100 Article 150 Slack 300, 301 Control part 501 1st part 502 2nd part

Claims (4)

A supply roll for storing the belt-like packaging material;
A collection roll for collecting the packaging material;
A placement section for placing an article to be packaged;
From the supply roll through the placement section to the recovery roll, the first portion is placed up to the sealing portion in a state where an article is placed on the first portion corresponding to the placement section of the series of packaging materials. A transport unit that folds the second part of the packaging material from the first part to the recovery roll over the article, while transporting the article, leaving the article in the sealing portion ;
By sealing with the edge portions each other said first portion and a second portion that overlap, the sealing to form a bag in which the article is accommodated between the first portion and the second portion and a locking portion,
Cutting means for cutting the bag body from the band-shaped packaging material;
On the sealing part side from the transport unit, a joining means for joining the packaging material on the collection roll side separated by the cutting means and the packaging material on the supply roll side used in the next packaging,
At the timing when the article is placed between the supply roll and the placement section and the article is placed on the placement section, the supply of the band-shaped packaging material from the supply roll to the placement section is prohibited, At the timing when the transport unit transports the packaging material to the sealing portion, switching means for permitting the supply of the band-shaped packaging material from the supply roll to the mounting portion ,
A packaging device comprising:   The packaging device according to claim 1, wherein the switching unit includes a packaging material conveyance roller capable of switching between a rotation permission state and a rotation inhibition state. In timing at which the article to the placing part is placed, said packaging material conveying rollers is switched to the rotation inhibited state, the packaging device according to claim 2. Said packaging material conveying roller, in rotation permitted state, is rotatable with the band-shaped packaging material direction supplied to the placing part from the supply roll, and in that the reverse directions, according to claim 2 or 3 Packaging equipment.

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