JP6278352B2 - Pyramid package manufacturing apparatus and method of manufacturing pyramid package - Google Patents

Description

  The present invention relates to a pyramid package manufacturing apparatus and a method for manufacturing a pyramid package that manufacture a pyramid package from a tubular film.

  There has been proposed a pyramid package manufacturing apparatus for manufacturing a pyramid package using a cylindrical film extending in the axial direction while filling the cylindrical film with an article to be packaged. FIG. 23 shows an example of a conventional pyramid package manufacturing apparatus (see, for example, Patent Document 1). The pyramid package manufacturing apparatus X shown in the figure includes a filling pipe 91 and a pair of seal bars 92. The filling pipe 91 extends in the z direction, and fills a predetermined amount of the article 85 to be packaged from an upper portion outside the figure. The cylindrical film 81 is formed into a cylindrical shape by heat-sealing both ends in the width direction of the band-shaped film material in an upper portion outside the figure. The cylindrical film 81 is sent from the upper side to the lower side in the figure in a state of being fitted to the outside of the filling pipe 91. The pair of seal bars 92 is for forming a first seal portion 83A and a second seal portion 83B (described later in FIG. 24) extending in a direction perpendicular to the feed direction with respect to the tubular film 81. The seal bar 92 incorporates a heater, for example, and performs heat sealing on the tubular film 81. In addition, the pair of seal bars 92 is rotatable at an angle of 90 ° in a horizontal plane.

  FIG. 23 shows a state in which the cylindrical film 81 is fed by a predetermined amount after the second seal portion 83B is formed on the cylindrical film 81. Moreover, the filling pipe 91 is filled with the article 85 (not shown) at a predetermined timing. The pair of seal bars 92 heat-seal the tubular film 81 by approaching each other in the direction indicated by the solid line. And the pyramid package Y1 shown to Fig.24 (a) and FIG.24 (b) is obtained by cut | disconnecting the heat-sealed part suitably. The pyramid package manufacturing apparatus X continuously manufactures a plurality of pyramid packages Y1 by repeating feeding of the tubular film 81, turning of the pair of seal bars 92, heat sealing by the pair of seal bars 92, and cutting. .

  The pyramid package Y1 includes a packaging film 82 and an article 85 to be packaged. The packaging film 82 includes a first seal portion 83A, a second seal portion 83B, and a vertical seal portion 84. The first seal portion 83A and the second seal portion 83B extend in different directions, and are portions that are heat-sealed by the pair of seal bars 92 described above. The vertical seal portion 84 is a portion where the above-described film material is vertically sealed, and is preferably in a state of lying along the peripheral portion.

  The size and shape of the pyramid package Y1 are set depending on the type of the packaged object 85 and the improvement in customer collection required for the pyramid package Y1 as a product. Due to such a request, the first seal portion 83A and the second seal portion 83B are lengthened, and the first seals extending in different directions as the distance between the first seal portion 83A and the second seal portion 83B is shortened. It becomes difficult to form the portion 83A and the second seal portion 83B. For example, in the manufacture of the pyramid package Y1 shown in FIG. 24 (a), it is considered that the state in which the vertical seal portion 84 sandwiched between the pair of seal bars 92 is not properly laid down along the peripheral portion has been achieved. It is. In this case, the vertical seal portion 84 included in the second seal portion 83B has an irregular shape, and the flange portion 88 is formed together with the peripheral portion. Moreover, in manufacture of the pyramid package Y1 shown in FIG.24 (b), the part (The 1st seal | sticker part of the other pyramid package Y1) where the cylindrical film 81 pinched | interposed between a pair of seal bars 92 was already heat-sealed. This is an example that is considered to have been partially folded without being properly spread due to the influence of the shape of 83A). In this case, the flange portion 89 is easily formed near the end of the second seal portion 83B. Such a collar part 88 and a collar part 89 may be more likely to occur when the tubular film 81 is thicker or made of a stronger material.

JP-A-1-308707

  The present invention has been conceived under the circumstances described above, and provides a pyramid package manufacturing apparatus and a pyramid package manufacturing method capable of suppressing the occurrence of wrinkles in the seal portion. Let it be an issue.

  The pyramid package manufacturing apparatus provided by the first aspect of the present invention includes a film feeding means for feeding a cylindrical film in a feeding direction along an axial direction, and a first direction perpendicular to the feeding direction. A first sealing operation including a process of forming a first seal portion sandwiching the tubular film and extending in a second direction perpendicular to both the feeding direction and the first direction in the tubular film; Sealing means for alternately performing a second sealing operation including a process of forming a second seal portion sandwiching the tubular film in the second direction and extending in the first direction on the tubular film. A pyramid package manufacturing apparatus, wherein the cylindrical film is sandwiched between the position where the first seal portion or the second seal portion is formed on the upstream side in the feed direction. Forming means for forming a rum into a flat shape along the first seal portion or the second seal portion, and the seal means operates in the state where the forming means sandwiches the tubular film. Alternatively, the second sealing operation is performed.

  In a preferred embodiment of the present invention, the molding means is configured to remove the cylindrical film before the sealing means starts the process of forming the first seal part or the process of forming the second seal part. Complete the pinching action.

  In a preferred embodiment of the present invention, the sealing means includes a pair of first seal bars each extending in the second direction and capable of moving toward and away in the first direction. A pair of second seal bars that extend in one direction and can be moved toward and away from each other in the second direction.

  In a preferred embodiment of the present invention, the forming means is arranged to be spaced upstream of the pair of first seal bars in the feed direction, each extending in the second direction, and the first A pair of first forming bars that can freely move toward and away from each other in a direction, and a pair spaced apart upstream of the pair of second seal bars in the feed direction, each extending in the first direction; and A pair of second forming bars that are freely movable toward and away from each other in the second direction.

  In a preferred embodiment of the present invention, the forming means includes first elastic force urging means for urging an elastic force acting in a direction in which the pair of first forming bars approach each other, and the pair of second forming bars. Second elastic force urging means for urging an elastic force acting in a direction in which the forming bars approach each other.

  In a preferred embodiment of the present invention, the first elastic force urging means has a large distribution of elastic force in the second direction on one side in the second direction with respect to one of the first forming bars. An elastic force is applied, and an elastic force in which the distribution in the second direction becomes large on the other side in the second direction is applied to the other first molding bar, and the second elastic force urging means is An elastic force in which the distribution in the first direction becomes large on one side in the first direction with respect to one of the second forming bars, and elasticity in the first direction with respect to the other second forming bar. An elastic force is applied so that the force distribution becomes large on the other side in the first direction.

  In a preferred embodiment of the present invention, the first seal portion and the second seal portion are formed inside the tubular film, overlap with a region sandwiched by the forming means in the feeding direction, and the first seal portion and the second seal portion are formed. Is located on the upstream side in the feed direction with respect to the region to be moved, and is sandwiched between the forming means so that it takes a flat shape along the first direction and the second direction and is released from the forming means. It further includes a molded cylinder that returns to the shape.

  In a preferred embodiment of the present invention, the molded cylindrical body is disposed apart from each other in the second direction, and a pair of first folding easy portions that are relatively easy to be folded, and the first direction. And a pair of second easy-to-bend portions that are arranged apart from each other and are relatively easy to bend.

  In a preferred embodiment of the present invention, the pair of first foldable parts and the pair of second foldable parts reach the downstream end in the feed direction of the molded cylinder, and the molding means It is located on the downstream side in the feed direction with respect to the region sandwiched between the two.

  The manufacturing method of the pyramid package provided by the second aspect of the present invention includes a first film feeding step of feeding a tubular film along an axial direction, and a first direction perpendicular to the feeding direction. A first sealing step including a process of forming a first seal portion sandwiching the tubular film and extending in a second direction perpendicular to both the feeding direction and the first direction on the tubular film; A second film feeding step of feeding the tubular film along the axial direction, and a process of forming a second seal portion on the tubular film, sandwiching the tubular film in the second direction and extending in the first direction. Including a second sealing step, wherein the cylindrical film is sandwiched on the upstream side in the feed direction with respect to the position where the first seal portion is formed. A first molding step for molding the tubular film into a flat shape along the first seal portion, and sandwiching the tubular film on the upstream side in the feed direction with respect to a position where the second seal portion is formed. A second molding step of molding the cylindrical film into a flat shape along the second seal portion, and the first sealing step includes sandwiching the cylindrical film by the first molding step. The second sealing step performs the process of forming the second seal portion in a state where the tubular film is sandwiched by the second molding step. It is characterized by.

  In a preferred embodiment of the present invention, prior to starting the process of forming the first seal portion in the first sealing step, the operation of sandwiching the tubular film in the first molding step is completed, Prior to starting the process of forming the second seal portion in the second sealing step, the operation of sandwiching the tubular film in the second molding step is completed.

  In a preferred embodiment of the present invention, the first sealing step is performed using a pair of first seal bars each extending in the second direction and capable of moving toward and away in the first direction. The second sealing step is performed using a pair of second seal bars each extending in the first direction and capable of moving toward and away in the second direction.

  In a preferred embodiment of the present invention, the first molding step is arranged to be spaced upstream of the pair of first seal bars in the feed direction, each extending in the second direction, and A pair of first forming bars that can freely move toward and away from each other in the first direction are used, and the second forming step is arranged to be separated from the pair of second seal bars on the upstream side in the feed direction. And a pair of second forming bars each extending in the first direction and being freely movable toward and away from the second direction.

  In a preferred embodiment of the present invention, in the first molding step, a first elastic force acting in a direction approaching each other is applied to each of the pair of first molding bars, and in the second molding step, Energizes a second elastic force acting in a direction in which the pair of second forming bars approach each other.

  In a preferred embodiment of the present invention, in the first molding step, the first elastic force is such that a distribution in the second direction is larger on one side in the second direction than one first molding bar. And the first elastic force is applied to the other first molding bar so that the distribution in the second direction becomes larger on the other side in the second direction. The second elastic force is applied to the second forming bar so that the distribution in the first direction becomes large on one side in the first direction, and the first direction is applied to the other second forming bar. The second elastic force is applied so that the distribution in the second direction becomes larger on the other side in the first direction.

  In preferable embodiment of this invention, it overlaps with the area | region pinched | interposed in the said 1st shaping | molding process and the said 2nd shaping | molding process in the said feed direction inside the said cylindrical film, and said 1st seal part and said 1st A molding cylinder located upstream of the region in which the two seal portions are formed is disposed in the feeding direction, and the molding cylinder is sandwiched in the first molding step and the second molding step, thereby It takes a flat shape along one direction and the second direction, and returns to a cylindrical shape in the first film feeding step and the second film feeding step.

  In a preferred embodiment of the present invention, the molded cylindrical body is disposed apart from each other in the second direction, and a pair of first folding easy portions that are relatively easy to be folded, and the first direction. And a pair of second easy-to-bend portions that are arranged apart from each other and are relatively easy to bend.

  In a preferred embodiment of the present invention, the pair of first foldable parts and the pair of second foldable parts reach the downstream end in the feed direction of the molded cylinder, and the first It is located on the downstream side in the feed direction with respect to the region sandwiched in the molding step and the second molding step.

  According to the present invention, when performing the process of forming the first seal portion or the second seal portion by the sealing means, the tubular film is sandwiched by the forming means and is formed flat. Yes. For this reason, it is possible to suppress wrinkling in the tubular film. Therefore, the pyramid package having the first seal part and the second seal part having an appropriate shape can be formed.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a perspective view which shows an example of the pyramid package manufacturing apparatus concerning this invention. It is a top view which shows the sealing means and shaping | molding means of the pyramid package manufacturing apparatus of FIG. It is a principal part enlarged plan view which shows the sealing means and shaping | molding means of the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows the sealing means and shaping | molding means of the pyramid package manufacturing apparatus of FIG. It is principal part sectional drawing in alignment with the VV line | wire of FIG. It is principal part sectional drawing in alignment with the VV line | wire of FIG. It is principal part sectional drawing in alignment with the VII-VII line of FIG. It is principal part sectional drawing in alignment with the VII-VII line of FIG. It is a perspective view which shows the shaping | molding cylinder of the pyramid package manufacturing apparatus of FIG. It is a timing chart which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a perspective view which shows the shaping | molding cylinder in an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part top view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part front view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a principal part top view which shows an example of the manufacturing method of a pyramid package using the pyramid package manufacturing apparatus of FIG. It is a perspective view which shows an example of the pyramid package manufactured by the pyramid package manufacturing apparatus shown in FIG. It is a principal part top view which shows the modification of a sealing means and a shaping | molding means. It is a principal part front view which shows the other modification of a sealing means and a shaping | molding means. It is a perspective view which shows an example of the conventional pyramid package manufacturing apparatus. (A) is a perspective view which shows an example of the pyramid package manufactured by the conventional pyramid package manufacturing apparatus, (b) is another pyramid package manufactured by the conventional pyramid package manufacturing apparatus. It is a perspective view which shows an example.

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

  FIG. 1 shows an example of a pyramid package manufacturing apparatus according to the present invention. The pyramid package manufacturing apparatus A according to this embodiment includes a film material supply unit 1, a filling pipe 2, a vertical sealing unit 3, a film feeding unit 4, a sealing unit 5, a molding unit 6, and a molded cylinder 7. The pyramid package manufacturing apparatus A is an apparatus that continuously manufactures the pyramid package B shown in FIG. 20 by performing predetermined processing on the film material 80.

  The film material supply means 1 supplies a film material 80 and includes, for example, a film roll 11 and a former 12. The film roll 11 is obtained by winding a film material 80 into a roll shape. The film material 80 has a strip shape extending long, and becomes a cylindrical film 81 by applying a vertical seal described later. The former 12 is a member that shapes the film material 80 fed from the film roll 11 into a cylindrical shape surrounding the filling pipe 2.

  The film material 80 is usually composed of a single-layer or multi-layer resin film, and a multi-layer resin film having a sealant layer as an inner surface layer and a base film layer as an outer surface layer is preferably used. The sealant layer is a layer that can be melted and thermally fused by heating. When barrier properties such as gas barrier properties and light shielding properties are required, it is preferable to provide a barrier layer between the base film layer and the sealant layer. In addition, you may provide barrier property to the said base film layer itself. In this case, the barrier layer is used as the base film layer, and a multilayer sheet having the barrier layer and the sealant layer is obtained.

  Here, constituent materials of the base film layer, the sealant layer, and the gas barrier layer are exemplified. In addition, lamination | stacking of these each layer can be performed by the conventional lamination method, for example, the dry lamination by an adhesive agent, the heat lamination which adhere | attaches with a heat | fever by pinching | interposing a heat bonding layer.

  The sealant layer, which is an inner surface layer, is not particularly limited as long as it is a film that can be heat-sealed at a sealing temperature, and generally known ones are used. Specifically, for example, olefin resins such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-propylene copolymer (EP), unstretched polypropylene (CPP), biaxially stretched nylon (ON), an ethylene-olefin copolymer, an ethylene-acrylic acid copolymer (EAA), an ethylene-methacrylic acid copolymer (EMAA), an ethylene-vinyl acetate copolymer (EVA) or the like A stretched or unstretched film having two or more layers may be mentioned, and an olefin resin is preferably used because it is particularly excellent in heat-fusibility. The thickness of the sealant layer is, for example, about 30 μm to 200 μm.

  The base film layer that is an outer surface layer is not particularly limited as long as it is a film that does not melt or deform at the sealing temperature (for example, 80 ° C. to 110 ° C.), and polyester (polyethylene terephthalate (PET), polyethylene naphthalate ( PEN), polybutylene terephthalate (PBT), polycarbonate (PC), etc.), polyolefin (polyethylene (PE), polypropylene (PP), etc.), polyamide (nylon-6, nylon-66, etc.), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), polyether sulfone (PES), etc. Can be mentioned. The base film layer may be either transparent or opaque, but when the design print layer is provided on the inner surface side, the transparent base film layer is used. The thickness of the base film layer is, for example, about 10 μm to 100 μm.

  Examples of the barrier layer include a metal thin film such as aluminum, a resin film such as vinylidene chloride (PVDC) and an ethylene-vinyl alcohol copolymer (EVOH), or an arbitrary synthetic resin film (for example, a base film layer). May be a film obtained by vapor deposition (or sputtering) of inorganic oxides such as aluminum, aluminum oxide, and silica.

  The film material 80 is usually provided with a design printing layer (not shown) by a known method such as gravure printing in order to display a design such as a trade name. The design printing layer may be provided so that the design can be visually recognized from the outside. The design print layer may be provided on either the outer surface or the inner surface of the heat resistant film, but the design print layer is provided on the inner surface of the transparent heat resistant film in order to prevent the design print layer from being damaged. It is preferable.

  The filling pipe 2 is for filling the packaged object 85, and in the present embodiment, has a portion extending in the z direction as shown. The tubular film 81 formed by the film material 80 is sent downward in the z direction while being fitted to the filling pipe 2. For this reason, the z direction coincides with the axial direction of the tubular film 81 and is the feeding direction of the tubular film 81.

  The vertical sealing means 3 forms a tubular film 81 having a vertical seal portion 84 by heat-sealing both end portions in the width direction of the film material 80. In this embodiment, the film material 80 supplied from the film material supply means 1 is sent so as to wrap the filling pipe 2 from the circumferential direction. The vertical sealing means 3 heat-seals the film material 80 in a state where the inner side surfaces of both end portions in the width direction are matched. The vertical seal portion 84 formed by such a method is referred to as a palm type. In addition to the form in which the inner surfaces of the film material 80 are joined together, the vertical seal portion 84 has a form called an envelope type formed by joining the inner surface and the outer surface of the film material 80 together. In the case of forming the envelope-type vertical seal portion 84, measures such as making the material of the film material 80 suitable for this and using a bonding material as appropriate are taken. In the following description, a case where the tubular film 81 has a vertical seal portion 84 formed as a palm type will be described as an example.

  The film feeding means 4 is for feeding the tubular film 81 downward in the z direction. In the present embodiment, the film feeding means 4 is constituted by a plurality of rollers. The film feeding means 4 is not particularly limited as long as it can transmit the tubular film 81 in the z direction at a desired speed and timing. The number and arrangement of the plurality of rollers may be set as appropriate, and may be configured to have belts wound around the plurality of rollers arranged in the z direction as necessary. In the present embodiment, the film feeding means 4 is configured to intermittently feed the tubular film 81 as will be described later.

  In order to manufacture the pyramid package B from the tubular film 81, the sealing means 5 is provided with the first seal portion 83A and the second seal portion 83B at appropriate positions in the z direction (axial direction, feed direction) of the tubular film 81. It is means to form alternately. In the present embodiment, an operation including a process of forming the first seal portion 83A extending in the y direction by sandwiching the tubular film 81 in the x direction is defined as a first seal operation. Moreover, the operation | movement including the process which forms the 2nd seal | sticker part 83B extended in a x direction by pinching | interposing the cylindrical film 81 in ay direction is defined as a 2nd seal | sticker operation | movement. The process of forming the first seal part 83A and the process of forming the second seal part 83B refer to processes that directly contribute to forming the first seal part 83A and the second seal part 83B. For example, as described above, when the first seal portion 83A and the second seal portion 83B are formed by heat sealing, the sealant film is melted and joined. Then, as will be described later, the sealing means 5 is inevitably ancillary before and after the process for forming the first seal part 83A and the process for forming the second seal part 83B according to the mechanism. Processing may be included. These are collectively referred to as a first sealing operation and a second sealing operation.

  FIG. 2 is a plan view showing the sealing means 5 and the molding means 6, and FIG. 3 is an enlarged plan view of a main part showing the sealing means 5 and the molding means 6. As shown in these drawings, in this embodiment, the sealing means 5 includes a frame 50, a pair of first seal bars 51A, a pair of second seal bars 51B, a pair of first air cylinders 53A, and a pair of second cylinders. An air cylinder 53B is provided. The frame 50 supports the pair of first seal bars 51A, the pair of second seal bars 51B, the first air cylinder 53A, and the second air cylinder 53B, and the x direction and the y direction are diagonal in the z direction view. It is a substantially rectangular annular member.

  Each of the pair of first seal bars 51A extends along the y direction, and can be moved close to and away from the x direction. The material of the pair of first seal bars 51A is not particularly limited, but when heat sealing is performed, for example, the first seal bar 51A is made of a metal such as stainless steel. The pair of first seal bars 51A is an element that performs heat sealing by heating the tubular film 81 with the tubular film 81 sandwiched in the x direction. Each first seal bar 51A incorporates, for example, a heater (not shown) as a heat source for heat sealing. FIG. 4 is a side view of components including one first seal bar 51A. As shown in the figure, the first seal bar 51A has a first seal surface 52A. The first seal surface 52A is a surface facing the x direction, is a surface that contacts the tubular film 81 and transmits heat from the heater.

  In the present embodiment, the cutter 56A is built in one first seal bar 51A. The cutter 56A cuts the tubular film 81 simultaneously with or before or after the first sealing operation. More specifically, the first seal bar 51A has a portion divided in the z direction, and the cutter 56A is disposed between these portions. The cutter 56A is movable forward and backward in the x direction with respect to the first seal bar 51A by a drive source (not shown).

  The pair of first air cylinders 53A is a drive source for moving the pair of first seal bars 51A toward and away from each other in the x direction. A bracket 54A of each first air cylinder 53A is connected to each first seal bar 51A. In the present embodiment, the first seal bar 51A and the first air cylinder 53A are supported by the bracket 54A. The bracket 54A is fixed to the frame 50 as appropriate. In addition, a known guide mechanism may be adopted as appropriate in order to move the pair of first air cylinders 53A close to and away from each other accurately along the x direction.

  Each of the pair of second seal bars 51B extends along the x direction, and can be moved toward and away in the y direction. In the present embodiment, the pair of second seal bars 51B and the pair of second air cylinders 53B are obtained by rotating the pair of first seal bars 51A and the pair of first air cylinders 53A by 90 ° around the z direction. It has the same configuration. The pair of first seal bars 51A and the pair of second seal bars 51B are disposed at substantially the same position in the z direction. Each second seal bar 51B has a second seal surface 52B, and a cutter 56B is disposed on one second seal bar 51B. Each second seal bar 51B is connected to a rod 55B of each second air cylinder 53B. The second seal bar 51B and the second air cylinder 53B are supported by a bracket 54B. Moreover, you may employ | adopt suitably the well-known guide mechanism mentioned above for a pair of 2nd seal bar 51B.

  The forming means 6 sandwiches the tubular film 81 on the upstream side in the z direction with respect to the position where the first seal portion 83A or the second seal portion 83B is formed, thereby making the tubular film 81 the first seal portion 83A or the first seal portion 83A. It is formed into a flat shape along the two seal portions 83B. In the present embodiment, the position in the z direction where the first seal portion 83A and the second seal portion 83B are formed, that is, the position in the z direction of the pair of first seal bars 51A and the pair of second seal bars 51B. The same. For this reason, the shaping | molding means 6 is set as the structure which pinches | interposes the cylindrical film 81 in a little upstream in az direction with respect to a pair of 1st seal bar 51A and a pair of 2nd seal bar 51B.

  In the present embodiment, the forming means 6 includes a pair of first forming bars 61A, a pair of second forming bars 61B, a first elastic force biasing means 67A, and a second elastic force biasing means 67B.

  Each of the pair of first forming bars 61A extends in the y direction, and can be moved toward and away in the x direction. The first forming bar 61A is arranged in the same circumferential direction as the pair of first seal bars 51A when viewed in the z direction. Further, the first forming bar 61A is arranged at a position slightly spaced upstream from the pair of first seal bars 51A in the z direction. 5 is an enlarged cross-sectional view of a main part taken along line VV in FIG. 3, and FIG. 7 is an enlarged cross-sectional view of a main part taken along line VII-VII in FIG. As shown in these drawings, in the present embodiment, each first forming bar 61A has a rectangular cross section and includes a main body portion 62A and a covering layer 63A. The main body 62A is a member that ensures the strength of the first forming bar 61A, and the material thereof is not limited, but is made of a metal such as stainless steel. The covering layer 63A covers at least the front surface in the x direction of the main body 62A. The covering layer 63A is for suppressing heat from being transferred to the tubular film 81 when the main body 62A is heated above the first seal bar 51A in the z direction. The covering layer 63 </ b> A preferably has a function of improving slippage with respect to the tubular film 81. An example of such a coating layer 63A is a resin tape processed with a fluororesin.

  A pair of rods 65A is connected to the first forming bar 61A. Each of the pair of rods 65 </ b> A extends in the x direction, and is spaced apart in the y direction and arranged in parallel. Each rod 65A is inserted through the case 66A. The case 66A is a cylindrical member made of metal, for example. The pair of cases 66A is supported by a bracket 64A. The bracket 64A is formed by bending a metal plate, for example, and is fixed to the first seal bar 51A with bolts or the like as shown in FIG. Thus, in this embodiment, each 1st shaping | molding bar 61A becomes a structure moved forward / backward by each 1st air cylinder 53A with each 1st seal bar 51A.

  The first elastic force biasing means 67A biases a first elastic force that acts in a direction in which the pair of first forming bars 61A approach each other in the x direction. As shown in FIGS. 3, 5, and 7, in the present embodiment, the first elastic force biasing means 67A has two pairs of first built-in springs 671A and two first exterior springs 672A. More specifically, a pair of first built-in springs 671A and one first exterior spring 672A are provided for each first forming bar 61A. Each first built-in spring 671A is fitted to the rod 65A inside the case 66A. As shown in FIGS. 5 and 7, the rod 65A is provided with a protrusion positioned forward in the x direction in the case 66A. Further, the rear end of the case 66A in the x direction has a shape in which the rod 65A is exposed and the first built-in spring 671A abuts. As a result, the first built-in spring 671A has a front end in the x direction in contact with the rod 65A, a rear end in the x direction in contact with the case 66A, and is sandwiched between the rod 65A and the case 66A in the x direction. ing. Therefore, as shown in FIG. 8, when the first forming bar 61A is moved rearward in the x direction with respect to the bracket 64A (first forming bar 61A), the first built-in spring 671A moves the first forming bar 61A. An elastic force that is directed forward in the x direction is urged to the first forming bar 61A via the rod 65A.

  As shown in FIG. 3, the first exterior spring 672A is loaded on one of a pair of rods 65A connected to each first forming bar 61A. In the pair of first forming bars 61A, the first exterior spring 672A provided on one first forming bar 61A and the first exterior spring 672A provided on the other first forming bar 61A are in the y direction. Are loaded only on rods 65A located on opposite sides of each other. As shown in FIG. 5, the first exterior spring 672A is mounted on the rod 65A between the x-direction rear end of the first forming bar 61A and the x-direction front end of the case 66A. Thereby, as shown in FIG. 6, when the first forming bar 61A is moved rearward in the x direction with respect to the bracket 64A (first forming bar 61A), the first exterior spring 672A causes the first forming bar 61A to move to the x direction. An elastic force that is directed forward in the direction is applied to the first forming bar 61A.

  Thus, the first elastic force urging means 67A of this embodiment urges the first elastic force to a position where the pair of rods 65A are connected to the first forming bar 61A. Then, a larger elastic force is applied to the position where the rod 65A loaded with the first exterior spring 672A is connected than the position where the other rod 65A is connected. It can be said that such a first elastic force has a large distribution in the y direction on one side. Further, the first elastic force urged by the pair of first forming bars 61A has a distribution in which the first elastic force urged by one first forming bar 61A is large on one side in the y direction. It can be said that the first elastic force biased to the other first forming bar 61A has a distribution that becomes large on the other side in the y direction. The configuration having the two pairs of first built-in springs 671A and the two first exterior springs 672A is an example of the configuration of the first elastic force urging means 67A that exhibits the first elastic force having such a distribution. . The configuration of the first elastic force urging means 67A is not particularly limited. For example, the first exterior spring 672A may be omitted by using two types of first built-in springs 671A having different spring coefficients as a pair. Good.

  In the present embodiment, the relationship between the pair of first forming bars 61A and the first elastic force urging means 67A and the pair of second forming bars 61B and the second elastic force urging means 67B is the same as that of the pair of first described above. The relationship is similar to the relationship between the one seal bar 51A and the pair of first air cylinders 53A and the pair of second seal bars 51B and the pair of second air cylinders 53B. Further, the relationship between the pair of second forming bars 61B and the second elastic force urging means 67B and the pair of second seal bars 51B is such that the pair of first forming bars 61A and the first elastic force urging means 67A and the pair of second sealing bars 51B. This is the same as the relationship with the first seal bar 51A. That is, the pair of second forming bars 61B and the second elastic force urging means 67B are equivalent to those obtained by rotating the pair of first forming bars 61A and the first elastic force urging means 67A by 90 ° around the z direction. It has a configuration. For this reason, the main body 62B, the covering layer 63B, the bracket 64B, the rod 65B, the case 66B, the second built-in, which are constituent elements that accompany or are included in the pair of second forming bars 61B and the second elastic force urging means 67B Description of the spring 671B and the second exterior spring 672B is omitted.

  The molded cylinder 7 is disposed inward of the cylindrical film 81, overlaps the area sandwiched by the molding means 6 in the z direction, and is z higher than the area where the first seal portion 83A and the second seal portion 83B are formed. It is a cylindrical member located on the upstream side in the direction. The molded cylinder 7 is sandwiched between the molding means 6 to take a flat shape along the x direction and the y direction, and returns to the cylindrical shape when released from the molding means 6. As shown in FIG. 9, in the present embodiment, the molded cylinder 7 is attached to the lower end in the z direction of the filling pipe 2 and has a cylindrical shape as a whole.

  A good example of the material of the molded cylinder 7 is a material that can be appropriately deformed by the molding means 6 and exhibits an elastic force that can be restored to a cylindrical shape when released from the molding means 6. An example of such a material is polyurethane resin, for example. In the present embodiment, a cylindrical main body 70 made of such a polyurethane resin is employed. A covering layer 71 is provided to cover the main body 70. The covering layer 71 is a layer that improves slippage with respect to the tubular film 81 by covering the main body 70. An example of such a covering layer 71 is a resin tape processed with a fluororesin.

  Moreover, the molded cylinder 7 of this embodiment has a pair of first foldable parts 73A and a pair of second foldable parts 73B. The pair of first easy-to-bend portions 73A are portions that are spaced apart in the y direction and are relatively easy to bend with respect to the peripheral portion. The pair of second easy-to-bend portions 73B are portions that are spaced apart in the x direction and are relatively easy to bend with respect to the peripheral portion. In the present embodiment, each first bend easy part 73A and each second bend easy part 73B are configured by slits. The first bend easy part 73A and the second bend easy part 73B are not particularly limited as long as they can be easily bent with respect to the peripheral part. For example, the first foldable part 73A and the second foldable part 73B may be a part of the molded cylinder 7 that is partially thinned along the z direction, or similar to a hinge. The structure incorporating the mechanism may be used.

  FIG. 11 is a main part front view showing the filling pipe 2, the sealing means 5, the forming means 6, and the forming cylinder 7. As shown in the figure, in the present embodiment, as shown in FIGS. 9 and 11, the pair of first foldable parts 73 </ b> A and the pair of second foldable parts 73 </ b> B are lower ends in the z direction of the molded cylinder 7. It reaches the downstream end 72 located at. Further, as shown in FIG. 11, the pair of first foldable portions 73A and the pair of second foldable portions 73B are slightly downstream of the pair of first molded bars 61A and the pair of second molded bars 61B in the z direction. It is located in the side and is spaced apart from the region sandwiched between the pair of first forming bars 61A and the pair of second forming bars 61B on the downstream side in the z direction. That is, the pair of first easy-to-bend parts 73A and the pair of second easy-to-bend parts 73B are configured not to be sandwiched between the pair of first forming bars 61A and the pair of second forming bars 61B.

  Next, the manufacturing method of the pyramid package B using the pyramid package manufacturing apparatus A will be described below with reference to FIGS.

  FIG. 10 shows a timing chart of the method for manufacturing the pyramid package B using the pyramid package manufacturing apparatus A. This manufacturing method is a technique in which first seal portions 83A and second seal portions 83B are alternately formed on a tubular film 81 obtained by processing the film material 80. This figure shows a process of forming one first seal part 83A and one second seal part 83B and a process associated therewith. The horizontal axis in the figure is time. The vertical axis in the figure has an appropriate meaning as follows according to the displayed components.

  In the graph representing the film feeding means 4, the vertical axis corresponds to the speed at which the cylindrical film 81 is fed. The graph representing the filling of the packaged object 85 corresponds to a period during which the wired part fills the packaged object 85, and the wireless part is not filled with the packaged object 85. In the graph representing the vertical seal bar 31, the direction in which the pair of vertical seal bars 31 approach is upward in the drawing. Further, the period in which hatching consisting of discrete points is applied represents a process of forming the vertical seal portion 84 by partially heating the film material 80. In the graph representing the first forming bar 61A, the direction in which the pair of first forming bars 61A approach is upward in the drawing. In the graph representing the first seal bar 51A, the direction in which the pair of first seal bars 51A approach is upward in the drawing. Moreover, the period when the hatching which consists of discrete points was given represents the process which forms 83 A of 1st seal | sticker parts. In the graph representing the cutter 56 </ b> A, the direction in which the cutter 56 </ b> A advances to cut the tubular film 81 is upward in the drawing. The graph representing the second molding bar 61B, the second seal bar 51B, and the cutter 56B is described in the same manner as the graph representing the first molding bar 61A, the first seal bar 51A, and the cutter 56A.

  First, in a period in which time Tx0 ends, the film feeding means 4 feeds the cylindrical film 81 downward by a predetermined distance in preparation for the formation of the first seal portion 83A. This is the first film feeding step. Moreover, in this embodiment, the to-be-packaged object 85 is filled with the filling pipe 2 in parallel with the first film feeding step. FIG. 11 shows a state at time Tx0 when the first film feeding step is completed. The already formed second seal portion 83B is located downstream of the pair of first seal bars 51A in the z direction. And the to-be-packaged object 85 filled from the filling pipe 2 has accumulated in the z direction upstream of the 2nd seal | sticker part 83B. Since the feeding distance of the tubular film 81 by the film feeding means 4 and the amount of the packaged object 85 to be filled are set appropriately, the package is placed between the pair of first seal bars 51A and the pair of first molding bars 61A. The object 85 does not exist.

  Next, the first sealing step (first sealing operation) is started at time Tx1. That is, when the pair of first air cylinders 53A protrudes the pair of rods 55A, as shown in FIGS. 10 and 12, the pair of first seal bars 51A and the pair of first forming bars 61A move closer to each other. (Forward). At time Tx2, the pair of first forming bars 61A are brought into contact with each other via the forming cylinder 7 and the cylindrical film 81. FIG. 13 shows the molded cylinder 7 in a state immediately before reaching time Tx2. In the figure, the hatched area consisting of discrete points represents an area sandwiched between the pair of first forming bars 61A. The molding cylinder 7 is deformed into a flat shape along the y direction by being sandwiched between the pair of first molding bars 61A. In the present embodiment, the pair of first forming bars 61A sandwich the upstream portion in the z direction with respect to the pair of first bending easy portions 73A in the forming cylinder 7. For this reason, the portion where the pair of first foldable portions 73A is formed is not a portion that is actively deformed, but the pair of first foldable portions 73A is significantly bent along with the deformation of the upstream portion. It is done. Thereby, although the forming cylinder 7 is not sandwiched between the pair of first forming bars 61A in the vicinity of the downstream end 72, it is deformed into a flat shape having the pair of first bending easy portions 73A as both ends. Thus, at the time Tx2, the step of deforming the molded cylinder 7 is completed prior to the process of forming the first seal portion 83A.

  Then, at time Tx2 to time Tx3, the forward movement of the pair of first forming bars 61A stops, and the pair of first seal bars 51A further moves closer. In this period, as shown in FIG. 14, the first elastic force Fx by the first elastic force urging means 67A is generated as the pair of first seal bars 51A advances. The first elastic force Fx is divided into a component force Fx1 and a component force Fx2, and is urged toward the first forming bar 61A. The component force Fx1 is an elastic force generated by compressing one first built-in spring 671A. The component force Fx2 is an elastic force generated by compressing one first built-in spring 671A and one first exterior spring 672A. For this reason, the component force Fx2 is larger than the component force Fx1. With the configuration of the first elastic force urging means 67A described above, the component force Fx1 and the component force Fx2 are urged with respect to the pair of first forming bars 61A in a point-symmetric relationship. Since the molding means 6 having the above-described configuration is composed of a plurality of mechanical components, there are very small gaps and backlash due to industrial tolerances between the components. For this reason, when the large and small component forces Fx1 and Fx2 are urged to the pair of first forming bars 61A in a point-symmetric relationship, the cylindrical film 81 cannot be described in FIG. The pair of first forming bars 61A is considered to be sheared or twisted in the y direction. As a result of the trial and error by the inventors, it was hypothesized that the tubular film 81 would behave in such a way as to be pulled in the y direction by such shearing or twisting. That is, the tubular film 81 sent between the pair of first forming bars 61A and the forming cylinder 7 may be wrinkled due to the influence received from the already formed second seal portion 83B, or may be a palm-shaped vertical. It has been inferred that when the seal portion 84 is standing upright and is not properly along the peripheral portion, such wrinkles and standing up are pulled in the y direction and can be expected to be eliminated.

  Next, at time Tx3, as shown in FIG. 15, the first seal surfaces 52A of the pair of first seal bars 51A reach the state of sandwiching the tubular film 81 without any gap. The pair of first seal bars 51A is preheated by, for example, the above-described heater (not shown). For this reason, the process which forms the 1st seal | sticker part 83A starts at the time Tx3. This process continues for a predetermined time and ends at time Tx5. In this embodiment, as shown in FIG. 16, the cutter 56A moves forward at time Tx4 between time Tx3 and time Tx5. Thereby, the part heat-sealed by a pair of 1st shaping | molding bar 61A among the cylindrical films 81 is divided | segmented into the z direction upstream and downstream along ay direction, and the two 1st seal parts 83A arise.

  When the process of forming the first seal portion 83A is completed at time Tx5, the rod 55A of the pair of first air cylinders 53A starts to retreat. Thereby, a pair of 1st seal bar 51A moves apart. Further, during the period from time Tx5 to time Tx6, the compression of the pair of first built-in springs 671A and the first exterior spring 672A of the first elastic force biasing means 67A is gradually released, and at time Tx6, the pair of first The one built-in spring 671A and the first exterior spring 672A return to the natural length. Then, during the period from time Tx6 to time Tx7, the pair of first seal bars 51A and the pair of first forming bars 61A move away from each other integrally. Accordingly, as shown in FIG. 17, at time Tx7, the pair of first seal bars 51A and the pair of first forming bars 61A are completely separated from each other, and at least any timing in the period from time Tx6 to time Tx7. Thus, the pyramid package B is discharged downward in the z direction. The discharged pyramid package B is stored in a predetermined container (not shown) or the like via, for example, a product chute (not shown).

  When the first sealing step (first sealing operation) is completed at time Tx7, the second film feeding step is started at time Tx8. This second film feeding step performs the same operation as the first film step described above. The same applies to the filling of the package 85.

  When the second film feeding process is completed at time Ty0, the state shown in FIG. 18 is obtained. From this state, the second sealing step (second sealing operation) is started. The second sealing step is performed in a period from time Ty0 to time Ty8, and vertical sealing by the vertical seal bar 31 and molding by the pair of second molding bars 61B are performed. These steps including the second sealing step are performed by operating the pair of second seal bars 51B and the pair of second forming bars 61B in the same order and form as described for the first sealing step. Executed. As shown in FIG. 19, in the second sealing step, the second elastic force urging means 67B urges the second elastic force Fy to the pair of second forming bars 61B. The second elastic force Fy is divided into a component force Fy1 and a component force Fy2 and is urged to each second forming bar 61B. This is the same as the first elastic force Fx in the first elastic force urging means 67A described above. Further, the molded cylinder 7 is deformed flat so that the pair of second bendable portions 73B are at both ends. As a result, the second seal portion 83B is formed, and a new pyramid package B is obtained.

  Thereafter, the pyramid package B shown in FIG. 20 is sequentially manufactured by sequentially repeating the first film feeding step, the first sealing step, the second film feeding step, and the second sealing step.

  Next, the operation of the pyramid package manufacturing apparatus A will be described.

  According to this embodiment, when performing the process of forming the first seal portion 83A or the second seal portion 83B by the sealing means 5, the cylindrical film 81 is formed by the forming means 6 as shown in FIGS. It is sandwiched and shaped flat. For this reason, it is possible to avoid a wrinkle occurring in the tubular film 81. Therefore, as shown in FIG. 20, the pyramid package B having the first seal portion 83A and the second seal portion 83B having an appropriate shape can be formed.

  In particular, as the length of the first seal portion 83A and the second seal portion 83B is longer and the distance between the first seal portion 83A and the second seal portion 83B is shorter, the first seal portion 83A or the second seal portion 83B has wrinkles. There is a concern about the approach. According to the present embodiment, the cylindrical film 81 can be sandwiched and molded by the molding means 6 in a correspondingly long region corresponding to the first seal portion 83A and the second seal portion 83B having a long length. Is possible. For this reason, even if it is a case where wrinkles approach the first seal portion 83A or the second seal portion 83B, the generation of wrinkles can be suppressed. Even if the tubular film 81 is made of a relatively strong material, the tubular film 81 made of such a material is formed prior to the formation of the first seal portion 83A and the second seal portion 83B. It is possible to positively deform by means 6. Therefore, wrinkles can be prevented from occurring in the first seal portion 83A and the second seal portion 83B. According to the tests by the inventors, the length of the first seal portion 83A and the second seal portion 83B is 100 mm or more, the distance (pitch) between the first seal portion 83A and the second seal portion 83B is 130 mm or less, and the tubular film Under the manufacturing conditions in which the thickness of 81 is 50 μm or more, the hook portion 88 and the hook portion 89 are particularly likely to occur in the pyramid package Y1 manufactured by the pyramid package manufacturing apparatus X shown in FIG. According to the pyramid package manufacturing apparatus A, it has been confirmed that the generation of the flange 88 and the flange 89 can be remarkably suppressed even under the same conditions.

  Since the sealing means 5 has a pair of first seal bars 51A and a pair of second seal bars 51B, the tubular film 81 is securely sandwiched from both the x direction and the y direction, and the first seal portion 83A and The second seal portion 83B can be formed stably. Further, it is not necessary to rotate the pair of first seal bars 51A and the pair of second seal bars 51B around the z direction. For this reason, the manufacturing efficiency of the pyramid package B can be increased.

  Since the forming means 6 has a pair of first forming bars 61A and a pair of second forming bars 61B, the tubular film 81 is securely sandwiched from both the x direction and the y direction, and the tubular film 81 is flattened. Can be transformed into Further, it is not necessary to rotate the pair of first forming bars 61A and the pair of second forming bars 61B around the z direction. For this reason, the manufacturing efficiency of the pyramid package B can be increased. Further, as shown in FIGS. 4 and 11, the pair of first forming bars 61A and the pair of second forming bars 61B are upstream from the pair of first seal bars 51A and the pair of second seal bars 51B in the z direction. Are separated. For this reason, it is possible to prevent heat from being transmitted from each first seal bar 51A and each second seal bar 51B to each first molding bar 61A and each second molding bar 61B. Moreover, as shown in FIGS. 5-8, each 1st shaping | molding bar 61A and each 2nd shaping | molding bar 61B are comprised from the main-body part 62A and the main-body part 62B, the coating layer 63A, and the coating layer 63B. . Accordingly, the main body 62A and the main body 62B ensure the necessary strength, and even if the main body 62A and the main body 62B are temporarily heated, the heat is transmitted to the tubular film 81. It can be suppressed by the layer 63A and the covering layer 63B. Therefore, the tubular film 81 is formed by the pair of first formed bars 61A and the pair of second formed bars 61B while the tubular film 81 is reliably deformed by the pair of first formed bars 61A and the pair of second formed bars 61B. Unintentional heat sealing can be avoided.

  By providing the first elastic force urging means 67A and the second elastic force urging means 67B, as shown in FIGS. 12 to 15, the pair of first seal bars 51A and the pair of second seal bars 51B. While urging the first elastic force Fx and the second elastic force Fy to the pair of first forming bar 61A and the second forming bar 61B that come into contact with each other via the cylindrical film 81 and the forming cylinder 7 in advance, The pair of first seal bars 51A and the pair of second seal bars 51B can be moved closer together. Thus, the first seal portion 83A and the second seal portion 83B are formed in a state where the molded cylinder 7 is deformed flattened more strongly by the pair of first molding bars 61A and the pair of second molding bars 61B. Is possible.

  The first elastic force Fx and the second elastic force Fy are energized by dividing them into the component force Fx1, component force Fx2, component force Fy1, and component force Fy2 that are different from each other as described with reference to FIG. Therefore, as described as the hypothesis described above, the effect of pulling the tubular film 81 can be expected. Thereby, it can further suppress that wrinkles generate | occur | produce in 83 A of 1st seal parts, and the 2nd seal part 83B. According to the inventors' tests, the occurrence rate of wrinkles was about 5% when the component force Fx1, the component force Fx2, the component force Fy1, and the component force Fy2 were the same in each condition. On the other hand, in this embodiment, the generation rate of soot can be reduced to about 1%. In order to make the effect of pulling the tubular film 81 more prominent, it is preferable that the molded tubular body 7 is composed of the main body portion 70 and the covering layer 71 to improve the sliding with respect to the tubular film 81. .

  By providing the forming cylinder 7, the forming of the cylindrical film 81 by the forming means 6 can be performed more reliably and stably. The pair of first easy-to-fold parts 73A and the second easy-to-bend part 73B are provided in the molded cylinder 7, so that when the forming means 6 makes a flat shape, the pair of first easy-to-bend parts 73A and 73A A sharper width direction end (x direction end or y direction end) can be formed by the second easy-to-bend portion 73B. Due to the sharp width direction end, it is possible to remarkably accelerate the flat molding of the tubular film 81, and it is possible to further suppress the generation of wrinkles in the first seal portion 83A and the second seal portion 83B. In particular, the pair of first foldable portions 73A and the pair of second foldable portions 73B are provided on the downstream side in the z direction with respect to the pair of first molded bars 61A and the pair of second molded bars 61B. ing. Therefore, as shown in FIG. 13, when the molded cylinder 7 is sandwiched between the pair of first molded bars 61 </ b> A and the pair of second molded bars 61 </ b> B, While the bendable portion 73A and the pair of second bendable portions 73B are sharp ends in the width direction, the pair of first bendable portions 73A and the pair of second bendable portions 73B are a pair of first forming bars 61A. And it is not restrained directly by the pair of second forming bars 61B. For this reason, after a long period of use or after further high-speed operation, the pair of first foldable portions 73A and the pair of second foldable portions 73B are paired with the pair of first molded bars 61A and the pair of second molded bars. Even if a slight positional shift occurs with respect to 61B, a sharp width direction end can be formed in the pair of first foldable portions 73A and the pair of second foldable portions 73B. Since the molded cylinder 7 does not overlap with the pair of first seal bars 51A and the pair of second seal bars 51B in the z direction, the formation of the first seal portion 83A and the second seal portion 83B is the molded cylinder 7. Of course, it is not hindered.

  21 and 22 show a modification of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  In the modification shown in FIG. 21, the sealing means 5 has a pair of first sealing bars 51A, the forming means 6 has a pair of first forming bars 61A, and can rotate integrally around the z direction. It is configured. The illustrated state is a state in which the first sealing step described above is performed. In the case of performing the second sealing step, it is turned by 90 ° around the z direction and takes the state indicated by the imaginary line in the figure. Even if it is such a structure, generation | occurrence | production of the wrinkles of 83 A of 1st seal parts and the 2nd seal part 83B can be suppressed.

  In the modification shown in FIG. 22, the pair of first forming bars 61 </ b> A of the forming unit 6 can be moved close to and away from the pair of first seal bars 51 </ b> A of the sealing unit 5. Specifically, the forming means 6 has an air cylinder 68A for moving the first forming bar 61A, and a rod 69A of the air cylinder 68A is connected to the first forming bar 61A. Thus, the pair of first seal bars 51A and the pair of first forming bars 61A may be driven by separate drive sources. Also in such a modification, the first elastic force urging means 67A may be employed as necessary. Further, as a drive source, for example, a motor or the like may be employed instead of the first air cylinder 53A and the air cylinder 68A. The configuration in this modification is the same for the pair of second forming bars 61B and the pair of second seal bars 51B.

  The pyramid package manufacturing apparatus and the method of manufacturing the pyramid package according to the present invention are not limited to the above-described embodiments. The specific configuration of the pyramid package manufacturing apparatus and the method of manufacturing the pyramid package according to the present invention can be varied in design in various ways.

A Pyramid package manufacturing apparatus B Pyramid package 1 Film material supply means 2 Filling pipe 3 Vertical seal means 31 Vertical seal bar 4 Film feed means 5 Seal means 50 Frame 51A First seal bar 51B Second seal bar 52A First seal surface 52B Second seal surface 53A First air cylinder 53B Second air cylinders 54A and 54B Brackets 55A and 55B Rods 56A and 56B Cutter 6 Molding means 61A First molding bar 61B Second molding bars 62A and 62B Body portions 63A and 63B Covering layer 64A, 64B Brackets 65A, 65B Rods 66A, 66B Case 67A First elastic force biasing means 671A First built-in spring 672A First exterior spring 67B Second elastic force biasing means 671B Second built-in spring 672B Second exterior spring 68A Air Cylinder 69A Rod 7 Molded cylinder 3A first fold easily portion 73B second fold easily unit 72 downstream end 70 the main body portion 71 covering layer 80 film material 81 cylindrical film 82 packaging film 83A first seal portion 83B second seal portion 84 vertical seal portion 85 to be packaged

Claims (7)

Film feeding means for feeding the tubular film in the feeding direction along the axial direction;
A first seal portion sandwiching the tubular film in a first direction perpendicular to the feed direction and extending in a second direction perpendicular to both the feed direction and the first direction; A first sealing operation including a process for forming the cylindrical film, and a second process including a process for forming a second seal portion on the cylindrical film that sandwiches the cylindrical film in the second direction and extends in the first direction. A pyramid package manufacturing apparatus comprising sealing means for alternately performing a sealing operation,
By sandwiching the tubular film on the upstream side in the feed direction with respect to the position where the first seal portion or the second seal portion is formed, the tubular film is moved to the first seal portion or the second seal portion. A forming means for forming a flat shape along
Said sealing means, said at shaping means a state sandwiching the tubular film, said first sealing operation or the second sealing operation a row Umono, each extending in the second direction, and the second A pair of first seal bars that can freely move toward and away in one direction; and a pair of second seal bars that each extend in the first direction and can be moved toward and away in the second direction; Have
The molding means is arranged to be spaced upstream of the pair of first seal bars in the feeding direction, each extends in the second direction, and can be moved toward and away in the first direction. A pair of first forming bars and a pair of second seal bars are arranged apart from each other upstream in the feed direction, each extending in the first direction, and freely moving toward and away in the second direction. A pair of second forming bars, a first elastic force biasing means for biasing an elastic force acting in a direction in which the pair of first forming bars approach each other, and the pair of second forming bars Second elastic force urging means for urging the elastic force acting in the approaching direction,
The first elastic force urging means applies one elastic force to one of the first forming bars so that the distribution of elastic force in the second direction becomes large on one side in the second direction, and the other The first forming bar is given an elastic force in which the distribution in the second direction becomes large on the other side in the second direction,
The second elastic force urging means applies one elastic force to the second forming bar so that the distribution in the first direction becomes large on one side in the first direction, and the other second forming bar. The pyramid package manufacturing apparatus according to claim 1, wherein the elastic force distribution in the first direction is increased with respect to the bar on the other side in the first direction . The first elastic force biasing means has two pairs of first built-in springs and two first exterior springs,
The second elastic force biasing means has two pairs of second built-in springs and two second exterior springs,
The pair of first built-in springs are spaced apart in the second direction and apply equal elastic forces to the pair of first molded bars, and one of the first exterior springs is one of the first molded bars. An elastic force is applied to one side in the second direction of the second, and the other first exterior spring applies an elastic force to the other side in the second direction of the other first molding bar,
The pair of second built-in springs are spaced apart in the first direction and apply equal elastic forces to the pair of second forming bars, and one of the second exterior springs is one of the second forming bars. The elastic force is applied to one side in the first direction of the second, and the other second exterior spring applies the elastic force to the other side in the first direction of the other second forming bar. Pyramid package manufacturing equipment. Arranged inward of the tubular film, overlaps with a region sandwiched by the forming means in the feeding direction, and upstream of the feeding direction from a region where the first seal portion and the second seal portion are formed. A molded cylinder that is positioned and sandwiched by the molding means to take a flat shape along the first direction and the second direction and return to a cylindrical shape when released from the molding means. The pyramid package manufacturing apparatus according to claim 1 or 2 . The molding cylinder is disposed apart in the second direction and relatively easy to bend, and a pair of first easy-to-bend portions, and is spaced apart in the first direction and is not folded. The pyramid package manufacturing apparatus according to claim 3 , further comprising: a pair of second easy-to-bend portions that are relatively easy . A first film feeding step for feeding the tubular film along the axial direction;
A first seal portion sandwiching the tubular film in a first direction perpendicular to the feed direction and extending in a second direction perpendicular to both the feed direction and the first direction; A first sealing step including a treatment to form a film,
A second film feeding step for feeding the cylindrical film along the axial direction;
A method of manufacturing a pyramid package that repeatedly includes a second sealing step including a process of forming a second seal portion that sandwiches the tubular film in the second direction and extends in the first direction on the tubular film. There,
A first forming step of forming the tubular film into a flat shape along the first seal portion by sandwiching the tubular film on the upstream side in the feeding direction with respect to a position where the first seal portion is formed. When,
A second forming step of forming the tubular film into a flat shape along the second seal portion by sandwiching the tubular film on the upstream side in the feed direction with respect to the position where the second seal portion is formed. And further comprising
The first sealing step performs a process of forming the first seal portion in a state where the cylindrical film is sandwiched by the first molding step,
Said second sealing step, have rows process of forming the second sealing portion in a state in which the tubular film is sandwiched by the second molding step,
The first sealing step is performed by using a pair of first seal bars each extending in the second direction and capable of moving toward and away in the first direction.
The second sealing step is performed using a pair of second seal bars each extending in the first direction and being freely movable toward and away from the second direction,
In the first molding step, the pair of first seal bars are spaced apart from each other on the upstream side in the feed direction, each extends in the second direction, and can be moved toward and away in the first direction. Using a pair of first forming bars made,
In the second molding step, the pair of second seal bars are spaced apart from each other on the upstream side in the feed direction, each extends in the first direction, and can be moved toward and away in the second direction. Using a pair of second forming bars,
In the first molding step, a first elastic force acting in a direction approaching each other is applied to each of the pair of first molding bars, and the second direction is applied to one of the first molding bars. The first elastic force that gives a large distribution on the one side in the second direction is applied, and the distribution in the second direction becomes large on the other side in the second direction with respect to the other first molding bar. Give the first elastic force,
In the second forming step, a second elastic force acting in a direction approaching each other of the pair of second forming bars is urged, and the first direction is applied to one of the second forming bars. The distribution in the first direction is increased on the one side in the first direction, and the distribution in the first direction is increased on the other side in the first direction with respect to the other second forming bar. The method for producing a pyramid package, wherein the second elastic force is applied . Prior to starting the process of forming the first seal portion in the first sealing step, the operation of sandwiching the tubular film in the first molding step is completed,
Prior to starting the process of forming the second sealing portion in the second sealing step, complete the operation of sandwiching the tubular film in the second molding step, manufacture of the pyramid package according to claim 5 Method. The inner side of the tubular film overlaps the region sandwiched in the first molding step and the second molding step in the feeding direction, and more than the region where the first seal portion and the second seal portion are formed. A molding cylinder located on the upstream side in the feeding direction is disposed;
The molding cylinder has a flat shape along the first direction and the second direction by being sandwiched in the first molding step and the second molding step, and the first film feeding step and the first The manufacturing method of the pyramid package of Claim 5 or 6 which returns to a cylinder shape in a 2 film feeding process.

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