JP3220994U - Seal device - Google Patents

Abstract

To provide a sealing device capable of putting a film sealed in a container in a stretched state. A sealing device (1) according to the present invention is a sealing device (1) for sealing an elastically deformable container (100) having an opening (103) with a film (110), the container holding portion (4) holding the container (100) A container deformation portion 7 for elastically deforming the container 100 held by the container holding portion 4 so that the outer edge 102B of the bonding surface 106 of the container 100 to which the 110 is bonded moves inward in the radial direction of the container 100; And a seal portion 8 for sealing the container 100 by the film 110 in a state where the outer edge 102B of the adhesive surface 106 is moved inward in the radial direction of the container 100 by the container deformation portion 7. [Selected figure] Figure 7

Description

  The present invention relates to a sealing device for sealing a container with a film.

  Containers are filled with food or the like, and the container is sealed, for example, a conveyer for conveying the container, a filling unit used in the filling step for filling the container with food or the like during conveyance of the container, At the same speed as the transport speed, a film sent in parallel with the transport conveyor above the container, and a sealing portion used in a sealing step of sealing and cutting the container filled with food or the like with the film, and sealing There has been proposed a sealing device having a gas injector for injecting an inert gas toward the container prior to the process (see, for example, Patent Document 1).

JP, 2002-29507, A

  In the above-mentioned sealing device, the film is fed in a stretched state above the container. However, for example, when the pressure between the film and the container is changed due to an inert gas or the like, the film may come to have a corrugated state due to the influence of the pressure or the like. Sealing the container at the wavy part of the film makes it look unattractive.

  SUMMARY OF THE INVENTION In view of such circumstances, the present invention is intended to provide a sealing device capable of putting a film sealed in a container in a stretched state.

  The present invention has been made to solve the above problems, and the sealing device of the present invention is a sealing device for sealing an elastically deformable container having an opening with a film, wherein the container holding the container is held. A container deformation portion for elastically deforming the container held by the container holding portion so that the outer edge of the adhesive surface of the container to which the film is adhered moves inward in the radial direction of the container; And a sealing portion for sealing the container by the film in a state where the outer edge of the adhesive surface is moved to the inside in the radial direction of the container by the portion.

  In the sealing device according to the present invention, when the container deformation portion defines a projected area in a depth direction of the container in a region surrounded by the outer edge of the adhesive surface in a state where the container is not elastically deformed as a reference area. The container may be elastically deformed such that the projected area of the area is smaller than the reference area.

  In the sealing device according to the present invention, the container deformation portion elastically deforms the container so that a pair of diagonals formed on the outer edge side of the bonding surface of the container approaches.

  In the sealing device according to the present invention, the degree of inclination of the bonding surface which is inclined so as to extend away from the opening in the depth direction of the container increases as the container deformation portion moves outward in the radial direction of the container. As described above, the container is elastically deformed.

  In the sealing device according to the present invention, the container deformation portion pulls the bottom portion of the container held by the container holding portion downward in the depth direction of the container so that the overall length in the depth direction of the container is long. To be elastically deformed so as to be

  In the sealing device according to the present invention, the container deformation unit includes: an adsorption unit for adsorbing the bottom surface side of the container; and a lowering unit for moving the adsorption unit for adsorbing the container to the lower side in the depth direction of the container. , And is characterized by.

  In the sealing device of the present invention, the container deforming portion stops the operation of pulling the container after the container is sealed by the sealing portion.

  In the sealing device of the present invention, the container holding portion is provided on an inner side wall surface provided on the inner side surrounding the container housing space in which the container is housed, and on the upper side in the depth direction of the container housing space. An upper opening for opening the container storage space to the outside, a lower opening provided on the lower side in the depth direction of the container storage space, for opening the container storage space to the outside, and a depth of the container storage space And an engagement surface engaged with the vicinity of the outer edge in the radial direction of the container from the lower side of the direction, and when the container is pulled from the lower opening side by the container deformation portion, the engagement surface A force is generated to elastically deform the container.

  In the seal device of the present invention, the container has a flange portion extending radially outward around the opening, and the engagement surface is engaged with the flange portion.

  In the sealing device of the present invention, the engagement surface is engaged with an edge of the bottom portion of the container.

  According to the sealing device of the present invention, it is possible to achieve an excellent effect that the film sealed in the container can be put in a stretched state.

It is the schematic of the seal | sticker apparatus in embodiment of this invention. (A) is a perspective view showing a container holding part and a container of a seal device in an embodiment of the present invention. (B) is a top view at the time of making a container hold part of a seal device in an embodiment of the present invention hold a container. (C) is an AA arrow sectional view of (B). (A) is a perspective view showing a modification of a container attaching part of a seal device in an embodiment of the present invention, and a container. (B) is a top view when a container is hold | maintained at the modification of the container holding part of the sealing apparatus in embodiment of this invention. (C) is an AA arrow sectional view of (B). (A)-(C) are the figures which arranged in a time series the mode which elastically deforms a container by the container deformation part of the sealing apparatus in embodiment of this invention. The upper side of (A) is a cross-sectional view in which the shapes before and after elastic deformation of the container held by the container holding portion of the sealing device according to the embodiment of the present invention are drawn. The lower side of (A) is a plan view showing the outer edge of the flange portion of the container when the upper side of (A) is viewed from the depth direction F of the container. (B) is an enlarged view of the elliptical area W on the upper side of (A). The upper side of (A) is a cross-sectional view in which the shapes before and after elastic deformation of the container held by the container holding portion of the sealing device according to the embodiment of the present invention are drawn. The lower side of (A) is a plan view showing the outer edge of the flange portion of the container when the upper side of (A) is viewed from the depth direction F of the container. (A)-(C) are the figures which put in order the mode that the container elastically deformed by the container deformation part of the sealing apparatus in embodiment of this invention is sealed by a seal part in time series. The upper side is a cross-sectional view showing the container in an elastically deformed state sealed with a film. The lower side is a cross-sectional view showing the container in a state of not being elastically deformed sealed with a film.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

<Overall configuration>
The sealing device 1 in the embodiment of the present invention seals the elastically deformable container 100 with a film 110. The film 110 is, for example, a sheet formed of a synthetic resin such as PET (polyethylene terephthalate). The film 110 is placed in a rolled state. The sealing device 1 includes, for example, the control unit 2, the container conveyance unit 3, the container holding unit 4, the film supply unit 5, the gas replacement unit 6, the container deformation unit 7, the seal unit 8, and the trimming unit 9. And.

  The control unit 2 controls each part of the seal device 1. The container conveyance unit 3 is controlled by the control unit 2 and intermittently conveys the container 100 in the conveyance direction X together with the container holding unit 4. The container conveyance part 3 is comprised, for example by the conveyance conveyor by a chain drive, or a belt conveyor.

<Container>
The container 100 will be described with reference to FIG. The container 100 has the container main-body part 101 and the flange part 102, as shown to FIG. 2 (A). The container main body portion 101 has a stored item storage space 104 in which stored items such as food are stored. Moreover, the container main body part 101 has the opening part 103 which injects | throws in a thing to be accommodated. The stored item storage space 104 is opened to the outside through the opening 103. In the present embodiment, the container main body portion 101 is formed in a frustum shape such as a square frustum, for example, but is not limited to this. It may be.

  The flange portion 102 is a portion that extends outward in the radial direction of the container body portion 101 starting from the outer peripheral surface of the end portion of the container body portion 101 on the opening 103 side. The film 110 is adhered to an upper end surface (hereinafter, referred to as an adhesive surface) 106 extending radially outward from the opening 103 of the container 100. The upper end surface of the flange portion 102 is the bonding surface 106. The flange portion 102 may not be provided in the container 100. In this case, the end surface (upper end surface) of the opening 103 side end of the container 100 is the bonding surface.

  The container 100 is formed of an elastically deformable material. Examples of the elastically deformable material include synthetic resins such as PP (polypropylene) and PET (polyethylene terephthalate), but are not limited thereto, and may be other elastically deformable materials. .

<Container holding part>
The container holding unit 4 will be described with reference to FIG. The container holding unit 4 holds the container 100 and has a container storage space 40. The container holding part 4 has, for example, an inner side wall surface 41, an upper opening 42, a lower opening 43, and an engagement surface 44, as shown in FIG. 2A.

  In this specification, as shown in FIG. 2C, the direction in the container holding portion 4 parallel to the depth direction F of the container 100 when the container 100 is accommodated in the container accommodation space 40 Define as side depth direction D. The side corresponding to the opening 103 side in the depth direction F of the container 100 (container holding side depth direction D) is simply defined as the upper side, and the depth direction F of the container 100 (container holding side depth direction D) The side corresponding to the bottom surface portion 105 side of) is simply defined as the lower side. Further, in the present specification, a direction substantially perpendicular to the depth direction F of the container 100 going from the inner side to the outer side of the opening 103 is the radially outer side (see the arrow R1 in FIGS. 2A to 2C) A direction perpendicular to the depth direction F of the container 100 going from the outside side to the inside side of the opening 103 is defined as the radially inner side (see the arrow R2 in FIGS. 2A to 2C). Further, in the present specification, the direction perpendicular to the container holding side depth direction D from the inner side to the outer side from the inner side of the upper side opening 42 (or the lower side opening 43) of the container holding portion 4 is radially outward 2 (A) to (C), and the container holding side depth direction D from the outer side to the inner side of the upper side opening 42 (or lower side opening 43) of the container holding portion 4 The direction perpendicular to is defined as the radially inner side (see the arrow R2 in FIGS. 2A to 2C). In the present specification, if the above conditions are satisfied, the radially inner side and the radially outer side are not limited to the case where the shape of the opening 103, the upper side opening 42, and the lower side opening 43 is circular. It is applicable even if it is polygons, such as a quadrangle, and other shapes.

  The inner side wall surface 41 is a wall surface provided on the inner side of the container holding unit 4. The inner side wall surface 41 surrounds the periphery of the container accommodation space 40 around the container holding side depth direction D.

  The upper side opening 42 is an opening provided on the upper side of the container holding portion 4 in the container holding side depth direction D. The lower side opening 43 is an opening provided on the lower side of the container holding portion 4 in the container holding side depth direction D. The container accommodation space 40 is opened to the outside through the upper opening 42 and the lower opening 43.

  The engagement surface 44 engages with the flange portion 102 of the container 100 in the container holding side depth direction D when the container 100 is accommodated in the container accommodation space 40 as shown in FIGS. 2B and 2C. It is a face. Specifically, the lower side surface 102A of the flange portion 102 of the container 100 is engaged with the engagement surface 44. In the present embodiment, the engagement surface 44 corresponds to an end surface (upper end surface) on the upper side of the container holding side 4 in the container holding side depth direction D. Thus, the flange portion 102 is placed on the engagement surface 44, and the container 100 is supported by the container holding unit 4 through the engagement surface 44.

  As shown in FIGS. 3A to 3C, the container holding portion 4 may have an engagement surface 45 in addition to the engagement surface 44 or in place of the engagement surface 44. . The engagement surface 45 is an annular surface extending inward in the radial direction of the container holding portion 4 from the inner side wall surface 41 as a starting point. The engagement surface 45 corresponds to the upper side surface of the protrusion 46 provided in the vicinity of the lower end of the container holding side 4 in the container holding depth direction D. The projecting portion 46 is an annular projecting portion extending radially inward of the container holding portion 4 from the inner side wall surface 41 as a starting point. The lower opening 43 is formed on the inner peripheral side of the protrusion 46.

  As shown in FIG. 3C, when the container 100 is accommodated in the container accommodation space 40, the region near the outer edge 105A of the bottom surface portion 105 of the container 100 is engaged with the engagement surface 45. As a result, the bottom surface portion 105 of the container 100 is placed on the engagement surface 45, and the container 100 is supported by the container holding unit 4 through the engagement surface 45.

<Film supply unit>
The film supply unit 5 will be described with reference to FIG. The film supply unit 5 supplies the film 110 to the container 100 held by the container holding unit 4. The film supply unit 5 includes, for example, a film installation unit 50, a film winding unit 51, a first film guide unit 52, and a second film guide unit 53.

  For example, a roll-shaped film 120 is installed in the film installation unit 50. In this case, the film installation unit 50 is configured by, for example, an installation side shaft member. The installation side shaft member has a cylindrical shape. The axial direction of the installation side shaft member is the width direction Z of the container conveyance section perpendicular to both the conveyance direction X and the container holding side depth direction D (in FIG. It is simply parallel to the width direction Z. The roll film 120 is installed in the film installation unit 50 by inserting the axial hollow portion of the roll film 120 into the installation side shaft member. Then, the sheet-like film 110 is extended from the roll-like film 120 to the downstream side in the transport direction.

  The film winding unit 51 is controlled by the control unit 2 and winds the sheet-like film 110 extended from the film installation unit 50 on the downstream side of the film installation unit 50 in the transport direction X. The winding of the film 110 is controlled by the control unit 2 and intermittently performed in synchronization with the operation of the container conveyance unit 3. Specifically, for example, when the container is transported to the downstream side in the transport direction X after the sealing process in the sealing unit 8 described later is completed, or the trimming process in the trimming unit 9 is completed. It takes place when the container is transported to the downstream side in the transport direction X after that.

  The film winding unit 51 has, for example, a winding side shaft member 51A and a rotation unit 51B. The leading end of the film 110 in the lengthwise direction is fixed to the take-up side shaft member 51A. The axial direction of the winding side shaft member 51A is parallel to the width direction Z (the direction perpendicular to the paper surface in FIG. 1).

  The rotating portion 51B is, for example, a motor, and rotates the take-up side shaft member 51A. When the take-up side shaft member 51A is rotated, the film 110 is taken up around the take-up side shaft member 51A, and the roll-like film 120 installed in the film installation portion 50 is rotated, and the roll-like film 120 is rotated. And the film 110 is delivered to the downstream side.

  As shown in FIG. 1, the first film guiding portion 52 and the second film guiding portion 53 have a container holding side depth from the container holding portion 4 in one section between the film setting portion 50 and the film winding portion 51. On the upper side of the direction D, the length direction of the film 110 is substantially parallel to the transport direction X, and the flat surface of the film 110 is the opening surface 103A on the opening 103 side of the container 100 or the upper side of the container holding portion 4 The film 110 is guided to be in an attitude facing the opening surface on the opening 42 side (hereinafter referred to as an opposite attitude). The opening surface 103A is parallel to a plane formed by the transport direction X and the width direction Z (the direction perpendicular to the paper surface in FIG. 1). As shown in FIG. 1, when the section in which the film 110 is in the facing posture is defined as a film facing section P (the start point is P1 and the end point is P2), in the film facing section P, the film 110 has an adhesive surface 106 Preferably, it is guided to abut. The bonding surface 106 corresponds to the upper side surface of the flange portion 102. In the film facing section P, the film 110 may not be in a stretched state, but may be in a waved state to some extent.

  Specifically, the first film guiding portion 52 is constituted of, for example, a rotating shaft 52A and a cylindrical roller 52B that rotates on the rotating shaft 52A as an axis. The second film guiding portion 53 is configured of, for example, a pivoting shaft 53A, and a cylindrical roller 53B that rotates on the pivoting shaft 53A as an axis.

  The pivot shafts 52A and 53A and the rollers 52B and 53B are arranged such that their axial directions are parallel to the width direction Z (the direction perpendicular to the paper surface in FIG. 1). The roller 52B is disposed downstream of the film installation unit 50 in the transport direction X and on the lower side of the film installation unit 50 in the container holding side depth direction D. Further, the roller 53B is disposed in a section in the transport direction X between the roller 52B and the film winding unit 51, and on the lower side of the film holding unit 51 in the container holding side depth direction D. The roller 52B and the roller 53B are disposed at substantially the same position in the container holding side depth direction D.

  The film 110 extended from the film installation unit 50 toward the roller 52B contacts the lower side surface of the roller 52B in the container holding side depth direction D, while the film 110 itself maintains the facing posture to the roller 53B. You will be guided. The film 110 guided to the roller 53B is guided to the upper side of the container holding side depth direction D toward the film winding portion 51 while being in contact with the lower side surface of the roller 53B in the container holding side depth direction D .

  In addition, since the roller 52B and the roller 53B are disposed at substantially the same position in the container holding side depth direction D, in the film facing section P between the roller 52B and the roller 53B, the film 110 is in its own length direction Are guided so as to be substantially parallel to the transport direction X. Further, it is preferable that the roller 52B and the roller 53B be disposed immediately in front of the adhesive surface 106 so that the adhesive surface 106 and the flat surface of the film 110 abut.

<Gas replacement part>
The gas replacement unit 6 will be described with reference to FIG. The gas replacement unit 6 replaces the gas in the storage space 104 of the container 100 with an inert gas. Specifically, as shown in FIG. 1, the gas replacement unit 6 has a gas supply nozzle 60. The gas supply nozzle 60 is disposed upstream of the film facing section P in the transport direction X.

  The gas replacement unit 6 is controlled by the control unit 2 and the film 110 and the container holding unit 4 (or the container 100) from the upstream side in the transport direction X from the start point P1 of the film facing section P through the gas supply nozzle 60 The inert gas is injected toward the gap Q between them. The inert gas intrudes into the storage space 104 through the gap Q, purges the atmosphere in the storage space 104, and stays in the storage space 104. In addition, the gas replacement part 6 may inject an inert gas intermittently, and may inject continuously.

  Since the film 110 is in contact with the adhesive surface 106 of the container 100, the container 100 is covered. For this reason, the inert gas jetted from the gas supply nozzle 60 is difficult to escape out of the container 100, and tends to stay in the storage space 104. Therefore, in the sealing device 1 of the present embodiment, the gas in the container 100 can be easily replaced with the inert gas.

<Container deformation part>
The container deforming portion 7 will be described with reference to FIGS. 1, 4 and 5. As shown in FIG. 4C, the container deformation portion 7 is controlled by the control unit 2 so that the outer edge 102B of the bonding surface 106 of the container 100 to which the film 110 is bonded is the inside of the container 100 in the radial direction (FIG. The container 100 held by the container holding portion 4 is elastically deformed so as to move to the arrow K1 and K2 of C). The container deformation portion 7 is disposed below the container holding portion 4 in the container holding side depth direction D.

  The container deformation part 7 has, for example, a container deformation side lifting part 70 and a suction part 71, as shown in FIG. The container deformation side elevating unit 70 is controlled by the control unit 2 to raise and lower the suction unit 71 in the container holding side depth direction D. The container deformation side lifting unit 70 is configured of, for example, a piston and a cylinder. The adsorbing portion 71 adsorbs the bottom surface portion 105 side of the container 100. The adsorbing unit 71 is configured of, for example, a suction device that sucks gas or the like.

  Specifically, as shown in FIG. 4A, the container deformation side elevating unit 70 calls a position P3 at which the container 100 to be subjected to the sealing process by the container transport unit 3 is sealed (hereinafter referred to as a sealing process position). When it is conveyed to Fig. 1 and temporarily stopped, the suction unit 71 is raised in the container holding side depth direction D in response to an instruction from the control unit 2. And as shown to FIG. 4 (B), the bottom part 105 of the container 100 is adsorb | sucked by the adsorption | suction part 71. As shown in FIG. Next, as shown in FIG. 4C, in a state where the bottom portion 105 of the container 100 is adsorbed by the adsorption unit 71, the container deformation side elevating unit 70 lowers the adsorption unit 71. Thereby, the container 100 is pulled downward in the depth direction F of the container 100 in a state where the lower side surface 102A of the flange portion 102 of the container 100 is engaged with the engagement surface 44. At this time, as shown in FIG. 4C, the container 100 is elastically deformed and bent so as to be generally convex downward in the depth direction F of the container 100.

<Modification of container>
Next, a modified embodiment of the container 100 will be described with reference to FIG. The container 100 represented by the dotted line portion L shown on the upper side of FIG. 5A represents a cross section of the container 100 before being elastically deformed by the container deformation portion 7, and the container 100 represented by the solid line portion and the hatched portion is The cross section of the container 100 after elastic deformation by the container deformation part 7 is shown. Comparing the containers 100 before and after elastic deformation, the overall length in the depth direction F of the container 100 after elastic deformation is longer by H than the total length before elastic deformation as shown on the upper side of FIG. 5 (A). Become.

  Further, as shown in the upper side of FIG. 5A, the container 100 is bent so as to be convex downward in the depth direction F of the container 100 after elastic deformation. For this reason, the flange portion 102 of the container 100 after elastic deformation or the outer edge 102B of the bonding surface 106 is the flange portion 102 of the container 100 before elastic deformation or the bonding surface as shown on the lower side of FIG. It is located radially inward of the container 100 than the outer edge 102 B ′ of 106. In the present embodiment, the flange portion 102 of the container 100 after elastic deformation or the outer edge 102B of the adhesive surface 106 is closer to the position of the flange portion 102 of the container 100 before elastic deformation or the outer edge 102B 'of the adhesive surface 106. The whole is located inside the container 100 in the radial direction. As a result, as shown on the lower side of FIG. 5A, the container 100 in a region surrounded by the flange portion 102 of the container 100 after elastic deformation or the outer edge 102B of the bonding surface 106 (hereinafter referred to as the outer edge surrounding region). The projected area in the depth direction F of the frame 100 is smaller than the projected area (reference area) in the depth direction F of the container 100 of the outer peripheral area (area surrounded by the outer edge 102B ′) before elastic deformation.

  Further, as shown in the upper side of FIG. 6, after the container 100 is elastically deformed and bent so as to be convex downward in the depth direction F of the container 100, the container 100 is formed in the lower side of FIG. As shown in FIG. 6, while one pair of diagonals 107A and 107B formed on the outer edge 102B (102B ') side of the adhesive surface 106 of the same approaches, and on the outer edge 102B (102B') side of the adhesive surface 106 of the own. The other pair of diagonals 107C and 107D to be formed may be deformed so as to separate from each other. In this case, as shown on the lower side of FIG. 6, the outer edge 102B constituting one pair of diagonals 107A and 107B of the container 100 after elastic deformation is the outer edge 102B 'of the flange portion 102 of the container 100 before elastic deformation. It is located radially inward of the container 100. Further, as shown in the lower side of FIG. 6, the outer edge 102B constituting the other pair of diagonals 107C and 107D of the container 100 after elastic deformation is closer to the outer edge 102B 'of the flange portion 102 of the container 100 before elastic deformation. Are also located radially outward of the container 100. That is, unlike the embodiment of the present invention shown in FIG. 5 (A), in the embodiment of the present invention shown in FIG. 6, the flange portion 102 of the container 100 after elastic deformation or a part of the outer edge 102B of the bonding surface 106 The flange portion 102 of the container 100 before elastic deformation or the radially outer side 102B 'of the adhesive surface 106 is located radially inward of the outer edge 102B' of the container 100, and the other outer edge 102B is in the radial direction of the container 100 than the outer edge 102B '. Located on the outside. And even in this case, it is assumed that the projected area of the outer peripheral area after elastic deformation is smaller than the reference area, but it is not limited to this, and is the same as the reference area or The case where it becomes larger than the reference area is also included in the present invention.

  In addition, although flange part 102 of container 100 shown in Drawing 5 (A) and Drawing 6 or outer edge 102B 'of adhesion side 106 is formed in the shape of a quadrilateral, it is not limited to this, and other polygons It may be formed in a shape or a circular shape. And all the deformation modes other than the above in outer edge 102B 'are included in the present invention.

  5B is an enlarged view of a region W shown on the upper side of FIG. 5A. As shown in FIG. 5B, when the container 100 is elastically deformed by the container deforming portion 7, the container 100 extends away from the opening 103 in the depth direction F of the container 100 as it progresses outward in the radial direction of the container 100. The degree of inclination of the inclined flange portion 102 or bonding surface 106 is larger than that before elastic deformation. The same applies to the embodiment of the present invention shown in FIG. In this state, next, the seal processing is performed by the seal portion 8.

<Sealing part>
The seal portion 8 will be described with reference to FIGS. 1, 7 and 8. The sealing unit 8 is controlled by the control unit 2 and seals the container 100 in a state of being elastically deformed by the container deforming unit 7 with the film 110 at the sealing processing position P3 of the film facing section P. The seal unit 8 includes, for example, a seal side elevating unit 80 and a welding unit 81. The seal side elevating unit 80 is controlled by the control unit 2 to move the welding portion 81 up and down in the container holding side depth direction D. The welding portion 81 is heated to a predetermined temperature, and the film 110 is pressed against the bonding surface 106 so that the film 110 is welded to the bonding surface 106 by heat. In the initial upper state, the welded portion 81 stands by at the seal processing position P3 above the film 110 in the container holding side depth direction D.

  Specifically, as shown in FIG. 7A, after the container 100 to be sealed is elastically deformed by the container deforming portion 7 at the sealing processing position P3, the seal side elevating unit 80 is moved to the film 110 by the welding portion 81. The welding unit 81 is lowered in the container holding side depth direction D in response to an instruction from the control unit 2 so that the pressing force is pressed to the bonding surface 106. The timing for starting the descent of the welded portion 81 may be after the end of the elastic deformation of the container 100 by the container deforming portion 7 or may be during the elastic deformation operation. In any case, as long as the welded portion 81 can press the film 110 against the adhesive surface 106 after the end of elastic deformation, the timing for starting the descent of the welded portion 81 is not particularly limited.

  Then, as shown in FIG. 7B, the welding portion 81 applies heat to the film 110 and the container 100 for a predetermined time to weld the film 110 to the bonding surface 106. Thereby, the container 100 is sealed by the film 110.

  After the completion of welding, as shown in FIG. 7C, the seal-side lifting unit 80 raises the welding portion 81. Further, as shown in FIG. 7C, the adsorption unit 71 stops the adsorption on the container 100 and is lowered by the container deformation side lifting unit 70. The container 100 returns to its original shape by elastic deformation.

  Strictly speaking, in the film facing section P, the film 110 has a corrugated portion. For this reason, as shown in the upper side of FIG. 8, even if the film 110 is welded to the bonding surface 106 of the container 100 elastically deformed, the film 110 is welded in a waved state. When the elastic deformation is released and the container 100 returns to the original shape, the outer edge 102B of the flange portion 102 of the container 100 moves radially outward of the container 100 and the opening surface 103A as shown on the lower side of FIG. The degree of inclination of the adhesive surface 106 with respect to For this reason, the film 110 is stretched and stretched in a portion in a corrugated state by the adhesive surface 106. Thereby, the film 110 sealed in the container 100 can be put in a stretched state.

  After that, the container conveyance unit 3 moves the container 100 sealed in the conveyance direction X, moves the next container 100 to the seal processing position P3, and stops. Thereafter, an elastic deformation process on the container 100 by the container deformation unit 7 and a sealing process on the container 100 by the seal unit 8 are sequentially performed.

<Triming section>
The trimming portion 9 cuts and trims the film 110 for sealing the container 100 at the radially outer side of the outer edge 102 B of the adhesive surface 106 of the container 100. The trimming unit 9 is disposed downstream of the sealing unit 8 in the transport direction X. The trimming unit 9 has, for example, a trimming-side lifting unit 90 and a cutting unit 91. The trimming side raising and lowering unit 90 is controlled by the control unit 2 to raise and lower the cutting unit 91 in the container holding side depth direction D. The cut portion 91 cuts the film 110 radially outward of the outer edge of the adhesive surface of the container 100 (the outer edge 102B of the flange portion 102). In the initial upper state, the cut portion 91 is an upper side of the container holding side depth direction D than the film 110 at a position (hereinafter referred to as a trimming processing position) P4 at which the sealed container 100 to be trimmed is trimmed. Are waiting at

  When the sealed container 100 to be trimmed is transported to the trimming processing position P4, the trimming side elevator unit 90 receives an instruction from the control unit 2 and lowers the cut portion 91 in the container holding side depth direction D Let Then, the cut portion 91 cuts the film 110 radially outside the outer edge (the outer edge 102A of the flange portion 102) of the adhesive surface of the container 100. Thus, trimming of the container 100 is completed. Thereafter, the container conveyance unit 3 moves the container 100 trimmed in the conveyance direction X, moves the next container 100 to the trimming processing position, and stops it.

  The sealing device 1 according to the embodiment of the present invention described above is of a type in which the welding portion 70 descends to the container 3. However, the present invention is not limited to this. It may be of a type which is raised up to a portion corresponding to 70 to perform sealing and trimming. Even in this case, the container deforming portion 7 appropriately moves up and down following the movement of the plurality of containers 100 and deforms the plurality of containers 100 before the sealing process is performed, as in the above.

  The sealing device of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

Reference Signs List 1 seal device 2 control unit 3 container conveyance unit 4 container holding unit 5 film supply unit 6 gas replacement unit 7 container deformation unit 8 seal unit 9 trimming unit 40 container accommodation space 41 internal side wall surface 42 upper side opening 43 lower side opening 44, 45 Engagement surface 46 Protrusion part 50 Film installation part 51 Film winding part 51A Winding side shaft member 51B Rotation part 52 1st film guide part 52A, 53A Rotation axis 52B, 53B Roller 53 2nd film guidance part DESCRIPTION OF SYMBOLS 60 Gas supply nozzle 70 Container deformation side raising / lowering part 71 Adsorption part 80 Seal side raising / lowering part 81 Welding part 90 Trimming side raising / lowering part 91 Cut part 100 Container 101 Container body part 102 Flange part 102A Lower side of flange part 102B, 102C of flange part Outer edge 103 Opening 103A Opening surface 104 Containment storage space 10 Bottom portion 106 adhesive surface 107A, 107B, 107C, 107D diagonal 110 film 120 roll film

Claims (10)

A sealing device for sealing an elastically deformable container having an opening with a film, the sealing device comprising:
A container holding unit for holding the container;
A container deformation portion for elastically deforming the container held by the container holding portion so that the outer edge of the adhesive surface of the container to which the film is adhered moves inward in the radial direction of the container;
A sealing unit that seals the container with the film in a state where the outer edge of the adhesive surface is moved inward in the radial direction of the container by the container deformation portion;
Characterized in that,
Sealing device. The container deformation portion defines the projected area of the region when the projected area of the region surrounded by the outer edge of the adhesive surface in a state where the container is not elastically deformed is defined as the reference area in the depth direction of the container. Elastically deforming the container such that is smaller than the reference area,
The seal device according to claim 1. The container deforming portion elastically deforms the container such that a pair of diagonals formed on the outer edge side of the adhesive surface of the container approach each other.
The sealing device according to claim 1 or 2. The container deformation portion elastically deforms the container so that the degree of inclination of the bonding surface which is inclined so as to extend away from the opening in the depth direction of the container as the container moves radially outward Are characterized by
The sealing device according to any one of claims 1 to 3. The container deforming portion elastically deforms the container so that the entire length in the depth direction of the container becomes long by pulling the bottom portion of the container held by the container holding portion downward in the depth direction of the container. Characterized by
The sealing device according to any one of claims 1 to 4. The container deformation unit is
An adsorption unit for adsorbing the bottom side of the container;
A lowering unit for moving the adsorption unit for adsorbing the container to the lower side in the depth direction of the container;
Characterized by having
The sealing device according to any one of claims 1 to 5. The container deforming unit stops the operation of pulling the container after the container is sealed by the sealing unit.
A sealing device according to claim 5 or 6. The container holding unit is
An inner side wall surface provided on an inner side surrounding a container accommodation space in which the container is accommodated;
An upper opening provided on the upper side in the depth direction of the container accommodation space and opening the container accommodation space to the outside;
A lower side opening provided on the lower side in the depth direction of the container accommodation space and opening the container accommodation space to the outside;
An engagement surface that engages with the outer edge of the container in the radial direction from the lower side in the depth direction of the container accommodation space;
Have
When the container is pulled by the container deforming portion from the lower side opening side, a reaction force is generated on the engagement surface to elastically deform the container.
The sealing device according to any one of claims 1 to 7. The container has a flange portion extending radially outward around the opening;
The engagement surface engages with the flange portion.
The seal device according to claim 8. The engagement surface engages with an edge of the bottom portion of the container,
The sealing device according to claim 8 or 9.

Images