JP6334283B2 - Packaging machine and packaging method - Google Patents

Description

  The present invention relates to a packaging machine and a packaging method, and more specifically to a technique for packaging a product in a compressed state.

  When packaging a product with a packaging film, there is a package manufactured by storing the product in a compressed state and sealing a predetermined portion of the packaging film. In order to manufacture such a package, for example, a product that has been manually compressed is packaged in a bag that is open on one side, and then the package that is sealed by sealing one side that is open is manufactured. Such a manual bagging operation has a problem that the number of manufactured items per unit time cannot be increased too much. In addition, in the manual packaging method, it is difficult to insert the product into the bag body in a state where the entire product is neatly compressed. In addition, there is a technique in which an article in a compressed state is automatically wrapped with a packaging film by a packaging machine instead of being manually packed in a bag (Patent Document 1).

Japanese Patent Laid-Open No. 7-40912

  For example, a packaging machine that supplies a compressed article in a packaging film and seals and cuts a predetermined position of the packaging film that stores the article to manufacture a packaging body improves the number of production compared to the one manufactured manually. Can be made. However, for example, it may be any material as long as it has a relatively low elasticity such as a sponge and can be compressed even with a relatively small force and can maintain its compression state. For example, it has a high elasticity and a large elastic restoring force. In such a case, the article cannot be packaged in a greatly compressed state, and the final package may be too tall and cannot be thinned.

  Further, when the size of an article to be packaged, for example, an article is large along the traveling direction of the packaging film, it is complicated or difficult to supply the film in a desired compressed state by either hand or machine.

In order to solve the above-described problems, the packaging machine of the present invention is (1) a pressing unit that compresses a product sandwiched from above and below by continuously supplied film at a fixed position, and the pressing unit compresses the product. The side seal means for adhering the side edges of the upper and lower films exposed to the outside in a state of being attached to the upstream side of the pressing means, and the upper and lower films are bonded in a direction intersecting the traveling direction And a means for cutting a top seal portion formed by bonding with the top seal means, and the side seal means adheres while moving along the side edge of the film. After the side sealing means adheres the film, the top sealing means is driven to perform the adhering process . There are various modes of sandwiching the film from above and below, such as when the product is sandwiched between separate films, or when the product is sandwiched by folding a single film. The side edge of the film is, for example, a belt-like film as in the first embodiment, and is supplied continuously to sandwich the product, and is cut from the belt-like film by cutting it in the traveling direction and the lateral direction of the film. If Te such packaging individual packaging body, ing the side of the strip film.

  Since the product sandwiched by the film from above and below is compressed by the press means in a state where it is placed at a fixed position, for example, the product can be easily set in the film and the product can be reliably compressed. And since the side edges of the film are bonded by the sealing means in such a compressed state, even if the product is strong in elasticity, the compressed state is maintained by the pressing means during the bonding process. The product compressed at the time of processing can be prevented from being urged in the direction of pulling the film positioned up and down in an attempt to return to its original state, and can be securely bonded by the sealing means. In addition, it is possible to easily cope with a change in dimensions simply by changing the moving distance of the sealing means.

(2) when adhered by the side sealing means, said exposed to the outside in a state in which the compression in a press unit, the film portion of the side edge located on the inside of the film to be bonded down by the side seal means It is advisable to provide a film restraining mechanism that sandwiches and fixes the film. In this case, the side edges of the film are fixed by the film restraining mechanism, so that the side edges of the upper and lower films will be in close contact with each other, and the thickness of the product compressed by the press means is thick Even so, it can be securely bonded and the sealed state is stabilized.

(3) The side seal means may be configured such that a press roller is disposed behind the sealer that heats the upper and lower films and the film is bonded by pressing the film with the press roller. In this way, since it can be surely sealed in a short time, the productivity is excellent.

(4) The side seal means may be configured to adhere by pressurizing and heating the film with a press roller equipped with a heater. By doing in this way, since it can adhere | attach in a short time like the above, it is excellent in productivity.

(5) The side seal means may be configured to adhere by heating and pressing the upper and lower films in multiple stages while moving intermittently. If it does in this way, films can be sealed stably reliably.

(6) wrapping method according to the present invention, the upper and lower product I vertical or we nip at film supplied continuously compressed in place, exposed to the outside in a state that the compression of the film While sandwiching the side edge with the side seal means, move the side seal means along the side edge to adhere the side edge , then, in the top seal means arranged on the upstream side from the fixed position, The upper and lower films were bonded and cut in a direction intersecting the traveling direction .

(7) bonded by the exposed to the outside is compressed and state, the side seal means and the side sealing means in a state where the film portion located inside the side edges and fixed by sandwiching the top and bottom of the film to be bonded by It is good to do.

  According to the present invention, it is possible to manufacture a package that stores a product compressed at a high compression rate, regardless of the material such as the dimensional shape and elasticity of the product. In particular, the packaging machine and the packaging method of the present invention are suitable for packaging products with high elasticity.

It is a front view which shows suitable 1st embodiment of the packaging machine which concerns on this invention. (A) is the side view, (b) is a front view which shows the sealing device which abbreviate | omitted description in FIG. It is a figure explaining an effect | action. It is a figure explaining an effect | action. FIG. 4A is an enlarged side view showing the state of FIG. 3B, and FIG. 4B is a view showing a state in which the product 4 is sandwiched between the upper film 10 and the lower film 11. It is a top view which shows the state of FIG.3 (c). (A) is an enlarged side view which shows the state of Fig.4 (a), (b) is a front view which shows the sealing device which abbreviate | omitted description in Fig.4 (a). (A) is an enlarged plan view which shows the state of Fig.4 (a), (b) is a figure which shows the state of the product and film after a side seal. (A) is an enlarged plan view which shows the state of FIG.4 (b), (b) is a perspective view which shows the package body manufactured. It is a side view which shows suitable 2nd embodiment of the packaging machine which concerns on this invention. It is a front view which shows suitable 2nd embodiment of the packaging machine which concerns on this invention. It is a front view of the side seal device which shows the suitable modification of the packaging machine concerning the present invention. It is a front view of the side seal device which shows the suitable modification of the packaging machine concerning the present invention.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not construed as being limited thereto, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

  1 to 9 show a first embodiment of a packaging machine according to the present invention. The packaging machine 1 of the present embodiment includes a packaging machine body 2, a film supply device 3 that is disposed on the upstream side of the packaging machine body 2 and supplies a packaging film to the packaging machine body 2, and an upstream side of the packaging machine body 2. And a product supply device 5 for supplying the product 4 to the packaging machine body 2.

  The product 4 of the present invention has elasticity. In the first embodiment, the product 4 is described as having a flat rectangular shape, but the present invention is not limited to this. For example, when the product 4 is sandwiched and compressed from above and below, the product 4 is elastically deformed and crushed to reduce the thickness, but when the sandwiching force is released, the product 4 expands due to the elastic restoring force.

  The product supply device 5 includes a lower transfer conveyor 7 and an upper transfer conveyor 8. The lower conveyance conveyor 7 has a conveyance surface installed in a horizontal plane, and conveys the product 4 placed on the conveyance surface toward the front. The upper conveyor 8 has a belt surface that can rotate forward and backward around the front side in the traveling direction. Specifically, as shown in FIG. 1 and the like, the upstream side is lifted up, and the belt surface is placed in a horizontal state as shown in FIG. Transition between the operation positions to be arranged. When the upper transport conveyor 8 is in the standby position, the separation distance between the upper transport conveyor 8 and the lower transport conveyor 7 at the upstream end on the carry-in side is set to be longer than the height of the product 4. Thereby, when the upper conveyance conveyor 8 is set at the standby position, the carry-in entrance is greatly opened, and the product 4 can be smoothly set on the lower conveyance conveyor 7. If the upper conveyor 8 is moved to the operating position while the product 4 is placed on the lower conveyor 7, the product 4 is sandwiched between the lower conveyor 7 and the upper conveyor 8, and the state When the lower conveyor 7 and the upper conveyor 8 are rotationally driven, the sandwiched product 4 receives a forward conveying force.

  The upper film 10 and the lower film 11 are used as the packaging film for storing the product 4 used in the present embodiment. The film supply device 3 supplies the upper film 10 and the lower film 11 to the product 4 so as to be sandwiched from above and below. Specifically, although not shown, the film supply device 3 rotatably holds the original fabric roll at a predetermined upper position and a predetermined lower position of the product supply device 5. The film supply device 3 includes a plurality of rollers 12 that regulate the film conveyance path, and is continuously drawn from the upper film 10 that is continuously drawn from the upper original roll and the lower original roll. The lower film 11 is passed over the rollers 12 and the respective leading ends thereof are guided near the downstream end of the product supply device 5. The ends of the upper film 10 and the lower film 11 are sealed and joined. As will be described later, this seal is a top seal portion formed in a top seal process performed in manufacturing the previous package.

  Thereby, the upper film 10 and the lower film 11 are arrange | positioned so that a conveyance path | route may be interrupted | blocked ahead of the product carried out from the product supply apparatus 5. FIG. Therefore, when the product 4 is carried out from the product supply device 5, the front end surface of the product 4 comes into contact with the upper film 10 and the lower film 11. When the product 4 further moves forward, the upper film 10 and the lower film 11 are urged by the product 4 and pulled forward in the traveling direction. Further, although not shown in the drawing, the film supply device 3 prevents the upper film 10 and the lower film 11 to be drawn from being urged so that a certain tension is applied, and prevents the film from being loosened by being drawn more than necessary. Equipped with a dancer roller and brake mechanism.

  Furthermore, when the front end of the product 4 reaches the front end of the lower transfer conveyor 7 and the upper transfer conveyor 8 and the transfer further proceeds, the transfer force from the lower transfer conveyor 7 and the upper transfer conveyor 8 gradually weakens and becomes smooth. Cannot be transported properly. Therefore, in this embodiment, as shown in FIG. 3B and FIG. 6, the seal portion 36 of the upper film 10 and the lower film 11 is gripped by the first clamp 15 and moved forward in the traveling direction by the first clamp 15. The product 4 is moved forward together with the upper film 10 and the lower film 11 and moved to the compression / seal work location of the packaging machine body 2. The first clamp 15 can be adjusted in the vertical direction according to the product height.

  The packaging machine body 2 includes a press device 16 at a compression / seal work location. The press device 16 includes a press lower plate 17, a press upper plate 18, a cylinder 19 and the like. The press lower plate 17 is fixedly installed at a predetermined height. The predetermined height is, for example, substantially matched with the transport surface of the lower transport conveyor 7. By doing in this way, the product 4 carried out from the product supply apparatus 5 is smoothly positioned at a fixed position on the press lower plate 17 with its upper and lower portions being sandwiched between the upper film 10 and the lower film 11.

  On the other hand, the upper end of the press plate 18 is connected to the top end of the cylinder rod of the cylinder 19 on its upper surface, and moves up and down following the reciprocation of the cylinder 19. When the press upper plate 18 is in the raised position, the separation distance between the press upper plate 18 and the press lower plate 17 becomes longer than the height of the product 4, and when the press upper plate 18 moves downward, the press lower plate 17 and the press The product 4 is compressed between the upper plate 18.

  As shown in FIG. 2A and the like, a lower film holding portion 20 that stands upward is provided on both side edges of the upper surface of the press lower plate 17 in the traveling direction. Further, upper side film holding portions 21 that hang downward are provided on both side edges of the lower surface of the press upper plate 18 in the traveling direction. The lower film holding portion 20 and the upper film holding portion 21 are arranged at positions facing each other in the vertical direction, and when the press upper plate 18 moves downward, the upper film holding portion 21 also moves downward together with the press upper plate 18, When the plate 18 reaches the lowered position, the upper film holding portion 21 and the lower film holding portion 20 come into contact with each other.

  The lateral widths of the upper press plate 18 and the lower press plate 17 are set to be shorter than the lateral widths of the upper film 10 and the lower film 11. Thereby, for example, as shown in FIGS. 5 and 7, both side edges of the upper film 10 and the lower film 11 protrude to the outside while the product 4 is compressed by the press device 16. And the predetermined area | region of the protruded film site | part is pinched | interposed and hold | maintained between the upper film suppression part 21 and the lower film suppression part 20. FIG. In the held state, both side edges of the upper film 10 and the lower film 11 protrude further outward from the upper film holding portion 21 and the lower film holding portion 20. Since the upper film 10 and the lower film 11 are sandwiched and held in the vicinity of both side edges by the upper film holding part 21 and the lower film holding part 20, the side edges of the upper film 10 and the lower film 11 are close to each other and in contact with each other. And even if the thickness of the product in the state compressed by the press means is thick, it can seal reliably. Therefore, as shown in FIG.9 (b), the length L1 from the edge part of a product to the edge part of the upper film 10 and the lower film 11 can be shortened, and a package can be manufactured at low cost. . In addition, since both side edges of the film projecting to the outside maintain a taut state, as shown in FIG. 9B, even if the length L2 of the packaging bag 37 is long, the film is securely sealed. can do.

  Moreover, in this embodiment, the upper film holding | suppressing part 21 is connected with the press upper board 18, and raises / lowers integrally. Therefore, the drive source for raising and lowering the upper film holding portion 21 is also used by the cylinder 19 of the press device 16.

  As shown in FIG. 2A and the like, side seal devices 25 are respectively arranged on the outer sides of both sides of the press device 16. As shown in FIG. 2B and the like, the side seal device 25 is for heat-sealing both side edges of the upper film 10 and the lower film 11. The side seal device 25 includes a pair of bar sealers 26 that sandwich the films from above and below, a pair of upper and lower nip rollers 28 disposed on both front and rear sides of the bar sealer 26, and a pair of upper and lower press rollers 29. The nip roller 28 is disposed in front of the film in the traveling direction (in other words, in the forward direction of the side seal device 25), and the press roller 29 is disposed in the rear of the film in the traveling direction (in other words, behind the side seal device 25 in the traveling direction). Deploy. In addition, you may arrange | position the press roller 29 ahead of the advancing direction of a film. In this way, the side seal device 25 can press and bond the upper and lower films 10 and 11 even when backing, and is unadhered by the bar sealer 26 at the end stop position of the side seal device 25. It is possible to add a function capable of bonding the film parts.

  The nip roller 28 is made of rubber and sandwiches both side edges of the upper film 10 and the lower film 11 with a predetermined pressure. The bar sealer 26 is adjacent to both side edges of the upper film 10 and the lower film 11 and heats the film portion. The press roller 29 pressurizes both side edges of the upper film 10 and the lower film 11 heated by the bar sealer 26 with a predetermined pressure, and heat-seals the film portion.

  The pair of upper and lower bar sealers 26, the nip roller 28, and the press roller 29 are configured to be openable and closable, and transition between a standby position separated from each other and an operating position where the upper film 10 and the lower film 11 can be sandwiched by approaching each other. . Specifically, the pair of upper and lower bar sealers 26 move up and down to approach and move away from each other, and the upper film 10 and the lower film 11 passing between the standby positions where the opposing seal surfaces are separated and the seal surfaces are close to each other. Transition between operating positions to heat. In the pair of upper and lower nip rollers 28, the support plate 28a to which the upper nip roller 28 is attached rotates in the forward and reverse directions with the lower end edge as the rotation center, and in the standby position, as shown in FIGS. 2 (a), 5 (a), etc. It inclines so that the upper side of 28a may open outside. As a result, the rotating shaft of the upper nip roller 28 is tilted upward integrally with the support plate 28a, and the upper nip roller 28 and the lower rotating shaft are separated from the horizontal nip roller 28 (FIGS. 2 and 5). Etc.). Further, at the operating position, as shown in FIG. 7A and the like, the support plate 28a stands up, and the rotation axis of the upper nip roller 28 becomes horizontal with the support plate 28a, so that the upper and lower nip rollers 28 are Contact (see FIG. 7 etc.). The same applies to the press roller 29, and a standby position and an operating position are taken by rotatably arranging a support plate 29a to which the upper press roller 29 is attached.

  A pair of upper and lower bar sealers 26, a nip roller 28, and a press roller 29 are installed on a moving table 30. The moving table 30 is linked to a guide rail 31 arranged along the film conveyance direction. The guide rail 31 is formed over the entire length of the packaging machine body 2. As a result, the movable table 30, and thus the bar sealer 26, the nip roller 28, and the press roller 29 move from the sealing work position facing the press device 16 to the standby position facing the carry-out conveyor 32 installed on the downstream side of the press device 16.

  Further, a top seal device 33 is disposed on the upstream side of the press device 16. The top seal device 33 includes a pair of upper and lower top sealers 34. The top sealer 34 moves up and down, and the seal surfaces of the top sealer 34 approach and separate from each other. Further, a cutter is built in the top sealer 34 to cut the seal portion.

  Furthermore, the 2nd clamp 35 is provided in the downstream of the press apparatus 16, as shown in FIG.4 (b). The second clamp 35 moves in a section from the vicinity of the press device 16 to the vicinity of the downstream side of the carry-out conveyor 32. The second clamp 35 can be adjusted in the vertical direction according to the thickness of the compressed product 4.

  Next, an embodiment of a packaging method using the packaging machine 1 configured as described above will be described. First, as shown in FIG. 1, the product 4 is set on the lower transport conveyor 7 in a state where the upper transport conveyor 8 is in the downwardly inclined standby position and the carry-in entrance side is open.

  Next, as shown in FIG. 3A, the upper conveyor 8 has the belt surface shifted to the upper horizontal operating position and sandwiches the product 4 from above and below. At this time, the product 4 may be compressed by the upper conveyor 8 and the lower conveyor 7. For example, the separation distance between the upper conveyor 8 and the lower conveyor 7 can be set to 1/10 to 1/2 of the height of the product 4. Moreover, the 1st clamp 15 is located in the vicinity of the seal | sticker site | part 36 which joined the upper film 10 and the lower film 11 at the appropriate timing. Further, the press upper plate 18 of the press device 16 is located at the raised position and is located above the upper surface of the product 4.

  Thereafter, the upper transport conveyor 8 and the lower transport conveyor 7 are rotationally driven to transport the product 4 so that the front end surfaces are brought into contact with the upper film 10 and the lower film 11, and the product 4 is moved to the packaging machine body 2 side together with the both films. Carry out and supply. Further, the first clamp 15 is closed to grip the seal portion 36, and the first clamp 15 is moved into the packaging machine body 2. Thereby, the 1st clamp 15 pulls out the product 4 with the upper film 10 and the lower film 11, and these films and the product 4 move forward within the press apparatus 16 (refer FIG.3 (b)).

  In the present embodiment, when moving in the press device 16, the side seal device 25 is positioned at a sealing work position facing the press device 16. The bar sealer 26, the nip roller 28, and the press roller 29 of the side seal device 25 located at this sealing work position are located at the standby position. Therefore, as shown in FIG. 5A, both side edges 10a and 11a of the upper film 10 and the lower film 11 are not in contact with the nip roller 28 and the like. Further, as described above, since the press upper plate 18 is also in the raised position, the product 4 smoothly moves forward on the press lower plate 17, and at that time, both side edges of the upper film 10 and the lower film 11. 10a and 11a travel in a space between a pair of upper and lower bar sealers 26, a nip roller 28, and a press roller 29.

  Further, the product 4, the upper film 10 and the lower film 11 moving in the press device 16 are in a state where the upper and lower sides of the product 4 are wrapped by the upper film 10 and the lower film 11 as shown in FIG. The both side edges 10a and 11a are not sealed and overlap with each other, and become a sealed portion 36 where the front end edges are joined. Further, as described above, predetermined positions of the seal portion 36 (in this embodiment, two locations in the vicinity of both side edges (see FIG. 6)) are gripped by the first clamp 15.

  When the product 4 is pulled out to a fixed position on the press lower plate 17 by the first clamp 15, the forward movement of the first clamp 15 is stopped and the product 4 is moved to the fixed position (FIGS. 3C and 6). reference). Further, when the product 4 reaches a fixed position, the entire product 4 is put on the press lower plate 17, and the product 4 is not positioned between the top sealers 34 of the top seal device 33 and the upper film 10. There is a lower film 11.

  In this manner, with the product 4 sandwiched between the upper film 10 and the lower film 11 from above and below being placed at a fixed position, the press device 16 is driven to compress the product 4. That is, as shown in FIG. 4A, FIG. 7A, etc., the press upper plate 18 is moved downward to compress the product 4 together with the upper film 10 and the lower film 11. Moreover, as shown to Fig.7 (a), while the side edge 10a of the upper film 10 and the side edge 11a of the lower film 11 are hold | maintained by the upper film holding | suppressing part 21 and the lower film holding | suppressing part 20, it is the side further The edge tip protrudes outward.

  Next, a pair of upper and lower bar sealers 26 of the side seal device 25 are brought close to the side edges 10a and 11a of the film, and are projected to the outside of the upper film holding portion 21 and the lower film holding portion 20 by the nip roller 28 and the press roller 29. The side edges 10a and 11a of the film are sandwiched (see FIG. 7 and the like). In this state, the moving table 30 moves forward in the film traveling direction (see FIG. 8A and the like). Then, the pair of upper and lower bar sealers 26, the nip roller 28, and the press roller 29 are sealed while moving along the side edges 10a and 11a while sandwiching the side edges 10a and 11a. Thereby, as shown in FIG.8 (b), the side edge 10a of the upper film 10 and the side edge 11a of the lower film 11 are heat-sealed, and the side seal part 37 is formed. Also during the side sealing, since the press upper plate 18 is in the lowered position, the product 4 is sealed while being compressed.

  Next, the top seal device 33 is driven, and the pair of top sealers 34 move close to each other to sandwich the upper film 10 and the lower film 11 to form the top seal portion 36, and then the top seal portion 36 is divided into two. Cut (see FIG. 4B, etc.). Also when this top sealing process is performed, the press upper plate 18 is positioned at the lowered position, and the product 4 remains in a compressed state. Thus, since the product is compressed between the press upper plate 18 and the press lower plate 17 during the sealing process, even if the product 4 is a highly elastic material, the compressed state is maintained until the product is sealed. Thus, the packaging body 38 in the compressed state can be manufactured (see FIG. 9B, etc.).

  Next, the package 38 is unloaded. First, when the package is manufactured, the second clamp 35 holds the seal portion 36 as shown in FIG. Next, the press upper plate 18 moves upward, and the second clamp 35 moves along the transport direction of the carry-out conveyor 32. Thereby, the package 38 is pulled out from the press device 16 and moves to the carry-out conveyor 32 side (see FIG. 4C and the like). The carry-out conveyor 32 is rotationally driven with the movement of the second clamp 35, for example, and assists the withdrawal of the package 38 by the second clamp 35. Thereafter, the carry-out conveyor 32 is driven and the package 38 is carried out.

  In the above-described embodiment, the top seal device 33 is provided and both the front and rear sides in the film traveling direction are sealed. However, the present invention is not limited to this, and one or both top seals are not performed. It is good also as the state which both opened.

  Further, in the above-described embodiment, the top seal device 33 is fixedly installed. However, for example, as with the side seal device 25, a press sealer may be moved, and may be a mobile sealer that seals while moving following the device. Further, in the above-described embodiment, the total length of the top sealer 34 is longer than the film width, and the top sealer 34 sandwiches the film at one time and seals the lateral direction of the film, but the present invention is not limited to this. Sealing may be performed while moving in the width direction.

  10 and 11 show a second embodiment of the present invention. In this embodiment, unlike the first embodiment, a sheet-like film for each sheet is used instead of a continuous film. Further, one side seal device 25 is installed on one side, and both side edges are sealed by the one side seal device 25.

  Specifically, the press lower plate 17 is attached to the rotary table 40 as shown in FIG. Thereby, the press lower plate 17 rotates in a horizontal plane. The press upper plate 18 is supported so as to be rotatable with respect to the cylinder 19. In addition, about the member which is the same as that of the apparatus of 1st embodiment mentioned above and respond | corresponds, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  Next, an embodiment of a packaging method using the packaging machine 1 configured as described above will be described. First, a sheet-like lower film 11 ′, a product 4, and a sheet-like upper film 10 ′ are placed on the lower press plate 17 in this order (see FIG. 10A). Next, the press upper plate 18 is moved downward to compress the product 4 (see FIG. 10B). At this time, the side edges 10 ′ a and 11 ′ a of the film are sandwiched and held by the upper film holding portion 21 and the lower film holding portion 20 and protrude outward. Here, the side edges 10'a and 11'a of the film are two opposite sides of the four sides of the lower film 11 'and the upper film 10' in this embodiment.

  Next, as shown in FIG. 10 (b), the product 4 is compressed and the side edges 10'a and 11'a of the film are held, as shown in FIGS. 11 (a) to 11 (b). The moving table 30 of the side seal device 25 moves along the guide rail 31. Accordingly, a pair of upper and lower bar sealers 26, a nip roller 28, and a press roller 29 move while sandwiching the side edges 10'a and 11'a of the film to seal the side edges 10'a and 11'a. In the present embodiment, since the side seal device 25 is provided on one side, a side seal is formed on one side edge in the sealing process. When the sealing process for one side edge is completed, the side seal device 25 moves backward with the pair of upper and lower bar sealers 26, the nip roller 28, and the press roller 29 opened, and returns to the position shown in FIG.

  Further, the rotary table 40 is driven to rotate the press lower plate 17 by 180 degrees. At this time, the press upper plate 18 is positioned at the lowered position and compresses the product 4. Upon receiving the rotation of the press lower plate 17, the product 4 and thus the press upper plate 18 also rotate 180 degrees. As a result, the other unsealed side edges 10'a and 11'a are located on the side seal device 25 side. Therefore, the moving table 30 is moved forward in the same manner as described above, and side seal portions are formed on the other side edges 10'a and 11'a.

  By performing the above processing, both side edges 10'a and 11'a of the film can be side-sealed in a state where the product 4 is compressed. And in this embodiment, unlike the first embodiment, since no top seal device is provided, the packaging in a state where the other two sides are opened in a state in which both side edges are side-sealed and the product is wound in a cylindrical shape Become a body.

  In the present embodiment, the turntable 40 is rotated 180 °, and side sealing is performed with respect to two opposite sides of the periphery of the film. However, the present invention is not limited to this, for example, every 90 °. You may make it rotate. If it does in this way, a sealing process can be performed using the side seal apparatus 25 with respect to all four sides of the periphery of a film. When side seals are applied to all four sides as described above, preferably, the upper film holding portion 20 and the lower film holding portion 21 may be provided on the four sides of the press lower plate 17 and the press upper plate 18.

  Moreover, it is good to arrange | position a top seal apparatus similarly to 1st embodiment. In this way, the two adjacent sides are sealed by the top seal device and the side seal device 25 in the first sealing process, and the remaining two sides are sealed in the second sealing process performed by rotating 180 °. it can. Further, in the above embodiment, the side seal can be moved by moving the side seal device starting from the top seal side or the already sealed side as a starting point. Can be suppressed.

  Furthermore, in each of the above-described embodiments and modifications, the side seal device 25 is sealed while continuously moving, but the present invention is not limited to this. For example, the side seal device 45 shown in FIG. It is also possible to use a seal by repeatedly contacting and separating the bar sealer 46 against the film while moving intermittently, and heating and pressurizing in multiple stages while sequentially changing the sealing position. The bar sealer 46 of the side seal device 45 is for sandwiching the film and heating and pressurizing it. Alternatively, a side seal device 47 may be used in which a film is sandwiched between the nip roller 48 and the heated press roller 49 shown in FIG. The means for heating and pressurizing the film is not limited to using a heating plate, and for example, a sealing method using ultrasonic waves may be used.

  In each of the above-described embodiments and various modifications, a packaging apparatus and a packaging method for manufacturing a four-sided sealed package in which a product is sandwiched between two films and four sides are sealed have been described, but the present invention is not limited thereto. For example, it is good also as a packaging apparatus and a packaging method which manufactures the three-side seal packaging body which bends one film and pinches | interposes a product and seals a predetermined part. Moreover, when performing various packaging processes, it is good also as a packaging apparatus and a packaging method which manufacture the package body which provided the unsealed part partially in the seal part. Moreover, an unsealed part may be provided in one side and may be provided in two or more sides. The side seal device can be configured to be able to seal in both reciprocating directions. For example, if the nip roller is changed to a press roller so that the press roller is arranged on both sides of the bar sealer, the upper and lower surfaces heated by the bar sealer can be moved in either the forward direction or the backward direction. The film can be pressed and adhered with a press roller.

DESCRIPTION OF SYMBOLS 1 Packaging machine 2 Packaging machine main body 3 Film supply apparatus 4 Product 5 Product supply apparatus 10 Upper film 10a Side edge 10 'Upper film 10'a Side edge 11 Lower film 11a Side edge 11' Lower film 11'a Side edge 16 Press apparatus 17 Press lower plate 18 Press upper plate 19 Cylinder 20 Lower film holding portion 21 Upper film holding portion 25 Side seal device 26 Bar sealer 28 Nip roller 29 Press roller 30 Moving table 31 Guide rail 38 Packaging

Claims (7)

A pressing means for compressing a product sandwiched from above and below by a continuously supplied film at a fixed position;
Side seal means for adhering the side edges of the upper and lower films exposed to the outside in a state compressed by the pressing means ;
A top seal means that is disposed upstream of the pressing means and adheres the upper and lower films in a direction intersecting the traveling direction;
Means for cutting a top seal portion formed by bonding with the top seal means;
With
The side seal means is configured to adhere while moving along the side edge of the film ,
A packaging machine characterized in that after the side sealing means adheres the film, the top sealing means is driven to perform the adhering process . When bonded by the side sealing means, it said exposed to the outside in a state in which the compression in a press section, sandwiches the film site located inside the side edges of the film to be bonded from above and below by the side seal means The packaging machine according to claim 1, further comprising a film holding mechanism for fixing. The side seal means arranges a press roller behind the sealer that heats the upper and lower films.
The packaging machine according to claim 1 or 2, wherein the press roller is configured to bond the heated upper and lower films by pressing. The packaging machine according to claim 1 or 2, wherein the side seal means is configured to be bonded by pressurizing and heating the upper and lower films with a press roller provided with a heater. The packaging machine according to claim 1 or 2, wherein the side seal means is configured to adhere by heating and pressing the upper and lower films in multiple stages while moving intermittently. A continuous up and down but if we nip you in the film, which is supplied product is compressed at a fixed position,
While sandwiching the side edges of the upper and lower films exposed to the outside in the compressed state with side seal means, the side seal means is moved along the side edges to bond the side edges ,
Next, a top sealing means disposed on the upstream side of the fixed position adheres and cuts the upper and lower films in a direction intersecting with the traveling direction thereof . In the state where the film is compressed and exposed to the outside and the film portion located inside the side edge of the film to be bonded by the side seal means is sandwiched and fixed from above and below, adhesion is performed by the side seal means. The packaging method according to claim 6.

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