JP2013103726A - Film folding member and packaging apparatus equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film folding member appropriately welded without being influenced by the thickness, surface shape, or the like of a packaged object, and a packaging apparatus equipped with the same.SOLUTION: The film folding member 21 forms a folded-together part 101e by folding back both side parts of a film belt body 101 and superposing both side edges of the film belt body 101. The film folding member includes a first part 22 folding back one side part of the film belt body 101, a second part 23 folding back an other side part of the film belt body 101, and a film support member 27 supporting the folded-together part 101e formed of the first part 22 and the second part 23. The film support member 27 is disposed to hold the folded-together part 101e by the film support member 27 and a welding member 31 welding the folded-together part 101e.

Description

  The present invention relates to a film folding member and a packaging device provided with the film folding member, in which both side portions of a film strip are folded and both side edges of the film strip are overlapped to form a folded portion.

  A folded section in which one film strip is folded around the left and right sides of a package such as paper or booklet, and the side edges of the film strip are overlapped on one side of the package. A package body that has been heat-sealed and has been closed by thermally fusing a film strip before and after the packaged object is widely used for logistics and mailing.

  FIG. 8 shows an example of such a package. As shown in FIG. 8, the package 900 has a flat-shaped package 91 wrapped with a film strip 92. The film strip 92 has a front end sealing portion 92a and a rear end sealing portion 92b that are heat-welded, and further, the vicinity of one side end 92c and the vicinity of the other side end 92d are overlapped, A folding portion 92e is provided. And in the vertical seal part 92f of the folding part 92e, the side ends of the film strip 92 are heat-welded.

  Here, in patent document 1, the structure which presses a welding means to the said film strip | belt body and is welded in the state which the to-be packaged object was wrapped with the film strip | belt body is disclosed.

JP 2008-68886 A

  Here, the welding means presses the film strip in a state where the package is supporting the film strip. In such a case, the welding means depends on the thickness or surface shape of the package. However, it may be impossible to press the film strip appropriately, resulting in poor welding.

  Accordingly, an object of the present invention is to provide a film folding member that can be appropriately welded without being affected by the thickness, surface shape, and the like of an object to be packaged, and a packaging device that includes the film folding member.

  1st invention of this application is a film folding member which folds up the both sides of a film strip, overlaps the both-sides edge of the above-mentioned film strip, and forms a folded part, A first part that folds the side part, a second part that folds the side part on the other side of the film strip, and a film support member that supports the folding part formed by the first part and the second part; The film supporting member is provided so as to sandwich the folded portion between the film supporting member and a welding member for welding the folded portion.

  According to the first aspect of the invention, when the welding member presses and welds the film strip, the film support member supports the film strip. Welding can be performed.

The first invention preferably further comprises the following configuration.
(1) The first part and the second part are separate from each other, and the film support member is attached to the first part or the second part, and the first part and the second part Each of the portions is movable in a direction orthogonal to the conveying direction of the folding unit.
(2) The first portion includes a first support portion that supports the film strip to be folded back, and a first folding portion that folds the film strip, and the second portion is the film strip. A second support portion for supporting the film strip, and a second folding portion for folding the film strip, wherein the film support member includes the first folding portion and the folding portion of the second folding portion. It is located downstream in the transport direction, and has a gap in the transport direction at least by the thickness of the film strip with respect to the first folded portion and the second folded portion.
(3) In the configuration (2), the first folded portion is positioned outward from the second folded portion, and the film support surface of the film support member is the second folded portion. Located on the same plane as the inner surface.
(4) In the configuration (2), the first folded portion is positioned outward from the second folded portion, and after being received by the first portion, the film support member supports the film. The first transport distance of the side of the film strip until reaching the surface, and the second transport distance of the side of the film strip from being received by the second portion until reaching the film support surface The position of the film support member is set to be equal.

  According to said structure (1), according to the length of the to-be-packaged object of the direction orthogonal to the conveyance direction of a folding part, a 1st part and a 2nd part can each be moved. As a result, even if the length of the packaged object in the direction orthogonal to the conveyance direction of the folding unit changes, it is not necessary to prepare a plurality of types of film folding members, and one type of film folding members Can respond. In addition, since the film support member is attached to the first part or the second part, when the first part and the second part are moved, the film support member also moves in the same manner. The member can be easily moved to a position suitable for welding the folded portion.

  According to the configuration (2), since the film support member is located in the vicinity of the first portion and the second portion, the length in the folding portion conveyance direction is made compact while maintaining smooth conveyance of the film strip. The obtained film folding member can be obtained.

  According to the configuration (3), since the position of the folded portion with respect to the packaged object can be made constant, that is, the gap between the packaged object and the folded part can be made constant, regardless of the thickness of the packaged object. The object to be packaged can be wrapped with a film strip with a certain margin.

  According to the configuration (4), it is possible to prevent the slack and wrinkles of the film strip that are generated when the first transport distance and the second transport distance are different.

  2nd invention of this application is a packaging apparatus provided with the film folding member of said 1st invention.

  According to the second aspect of the present invention, it is possible to provide a packaging apparatus that can be appropriately welded without being affected by the thickness, surface shape, etc. of the article to be packaged.

  In short, according to the present invention, it is possible to provide a film folding member and a packaging apparatus that can be appropriately welded without being affected by the thickness, surface shape, and the like of an object to be packaged.

It is a perspective view of the packaging apparatus which concerns on this invention. It is II-II sectional drawing of FIG. It is the schematic explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3A explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3B explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3C explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3D explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3E explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3F explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3G explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3H explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3I explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3J explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3K explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3L explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3M explaining the action | operation of a packaging part. It is the schematic following the state of FIG. 3N explaining the action | operation of a packaging part. It is the perspective view seen from the front of the packaging apparatus of FIG. It is an enlarged view of the film folding member part of FIG. It is a figure which shows the state in which the side edge parts of a film strip are piled up by a film folding member, and a folding part is formed. It is the schematic which shows the positional relationship of the 1st folding | turning part of a 1st part, the 2nd folding | turning part of a 2nd part, and a film support member. It is a figure which shows an example of a package body.

  FIG. 1 is a perspective view of a packaging device 10 according to the present invention. For convenience of explanation, the following description will be made assuming that the upstream side in the conveyance direction X of the package is “front” and the downstream side is “rear”.

  As shown in FIG. 1, a roll placement unit 11 on which a sheet roll 100 around which a resin film strip 101 that wraps an article to be wrapped is placed is placed at the lower part of the packaging device 10. Has been. In the upper part of the packaging device 10, the supply unit 12 on which the article to be packaged is placed, the packaging part 13 in which the article to be packaged is wrapped with a film strip, and the article to be packaged are packaged in order from the front to the rear. A discharge portion 14 for discharging the package is disposed. In the packaging device 10, control means (not shown) for controlling the operation of each unit constituting the packaging device 10 is arranged.

  That is, a CPU (Central Processing Unit) as a control means is a ROM (Read Only Memory) that stores an operation panel on which an input operation unit and an output display unit are arranged, a control program for controlling the operation of each unit, and the like. : Flash ROM), RAM (random access memory or hard disk) that temporarily stores various data, and various input / output devices are controlled.

  The roll placement unit 11 includes a support roller 111 and a support roller 112. Each of the support roller 111 and the support roller 112 has a cylindrical shape and is rotatably supported by the frame 10 a of the packaging device 10. The support roller 111 is linked to a support roller 112 as a driving roller by a timing belt, and is supported by the frame 10a so as to rotate in the same direction in conjunction with the rotation of the support roller 112. The sheet roll 100 is rotatably supported by a support roller 111 and a support roller 112, and a single strip-shaped film strip 101 is drawn upward from behind the support roller 112.

  The supply unit 12 includes a supply stand 121 on which the article to be packaged is placed, and a side plate 122 that regulates both side edges of the article to be packaged. The side of the article to be packaged placed on the supply stand 121 is regulated by the side plate 122 and sent to the packaging unit 13. In the present embodiment, the article to be packaged is manually sent to the packaging unit 13, but may be provided with an automatic supply mechanism. The supply unit 12 is configured to be detachable from the frame 10 a of the packaging device 10.

  The discharging unit 14 includes a discharging table 141 on which the package formed in the packing unit 13 is placed, and a holding member 142 that holds the discharging table 141 horizontally. The holding member 142 can be changed between a state of holding the paper discharge table 141 and a state of not holding the paper discharge table 141. When the holding member 142 does not hold the paper discharge table 141, the lower surface of the paper discharge table 141 is The frame 10a is folded so as to be in contact with the frame 10a.

  2 is a cross-sectional view taken along the line II-II in FIG. The packaging unit 13 includes a film folding member 21, a welding unit 30, a first conveyance unit 40, a fusing unit 50, and a second conveyance unit 60 in order from the front to the rear. The film folding member 21 folds the left and right side end portions of the film strip 101 and forms a folded portion in which the side end portions are overlapped. The welding unit 30 is bonded in the X direction by pressing the heated welding roller (welding member) 31 against the folded portion of the film strip 101 and melting the film strip 101 of the folded portion. . The 1st conveyance unit 40 conveys the film strip 101 by which the folding part was welded back, and sends it to the fusing unit 50. FIG. The fusing unit 50 uses the heated fusing member 51 to break and weld the film strip 101 on which the folded portion is welded in a direction (Y direction) perpendicular to the X direction, and the rear end portion and the front end portion are A sealed package is formed. The second transport unit 60 is configured to send the sealed package to the discharge unit 14.

  3A to 3O are schematic diagrams for explaining the operation of the packaging unit 13 excluding the film folding member 21. FIG. Hereinafter, the outline | summary of the action | operation of the packaging part 13 is demonstrated using FIG. 3A-FIG. 3O. FIGS. 3A to 3F are diagrams illustrating a preparatory operation before packaging an object to be packaged with the film strip 101, and FIGS. 3G to 3O illustrate a packaging operation of packaging the package with the film strip 101. FIGS. It is a drawing.

  As shown in FIG. 3A, the film strip 101 in which the side ends are overlapped by the film folding member 21 to form a folded portion is disposed on the transport surface 131 of the packaging portion 13.

  Next, as shown in FIG. 3B, the first driven roller 41 of the first transport unit 40 moves downward, and the film strip 101 is sandwiched between the first driven roller 41 and the first drive roller 42. Thereafter, in order to weld the folded portion, the welding roller 31 of the welding unit 30 moves downward and contacts the film strip 101. At the same time as the welding roller 31 welds the folded portion, the film strip 101 to which the folded portion is welded is sandwiched by the first driven roller 41 and the first drive roller 42 and conveyed backward.

  When the film strip 101 is transported backward by a certain amount, the driven roller 61 of the second transport unit 60 moves downward as shown in FIG. 3C, and the film strip 101 is separated from the second driven roller 61 and The first driven roller 41 is moved upward after being sandwiched by the second drive roller 62. The film strip 101 is sandwiched between the second driven roller 61 and the second drive roller 62 and conveyed backward.

  Next, when the welding of the folded portion is completed, as shown in FIG. 3D, the welding roller 31 moves upward, and the second driven roller 61 and the second drive roller 62 stop conveying the film strip 101. To do. Then, the fusing member 51 of the fusing unit 50 moves downward, fusing the film strip 101, and the rear end sealing portion of the film strip 101 is formed.

  Next, as shown in FIG. 3E, the fusing member 51 moves upward, and then, as shown in FIG. 3F, the second driven roller 61 and the second drive roller 62 are blown behind the film strip 101. The side portion (unnecessary film strip) is removed backward by conveying, and the second driven roller 61 moves upward. This completes the preparation before packaging an article to be wrapped with the film strip 101.

  Next, as shown in FIG. 3G, the package object 110 is inserted into the film strip 101. When the sensor 52 detects the object to be packaged 110, as shown in FIG. 3H, the first driven roller 41 moves downward, and the film strip 101 with the object to be packaged 110 inserted is the first It is sandwiched between the driven roller 41 and the first drive roller 42.

  Next, as shown in FIG. 3I, the welding roller 31 moves downward and contacts the film strip 101. At the same time as the welding roller 31 welds the folded portion, the film strip 101 into which the packaging body 110 is inserted and the folded portion is welded is sandwiched between the first driven roller 41 and the first drive roller 42 and is moved backward. Be transported.

  As shown in FIG. 3J, when the film strip 101 into which the article to be packaged 110 is inserted is fed backward by a certain amount, the second driven roller 61 moves downward as shown in FIG. The belt-like body 101 is sandwiched between the second driven roller 61 and the second drive roller 62, and then the first driven roller 41 moves upward. And the film strip 101 in which the package 110 was inserted is pinched by the 2nd driven roller 61 and the 2nd driving roller 62, and is conveyed back.

  Next, when the sensor 52 detects the front end portion of the article to be packaged 110, as shown in FIG. 3L, the film strip 101 into which the article to be packaged 110 is inserted has the second driven roller 61 and the second drive roller 62. Therefore, the front end portion of the article to be packaged 110 is positioned behind the fusing member 51. At the same time, the welding roller 31 moves upward.

  Next, as shown in FIG. 3M, the fusing member 51 moves downward to melt the film strip 101 into which the article to be packaged 110 is inserted, and the front end sealing portion of the film strip 101 is formed. . As a result, a package body in which the package object 110 is packaged with the film strip 101 is formed. At the same time, a rear end sealing portion of the film strip 101 into which the article to be packaged 110 is not inserted is also formed.

  Next, as shown in FIG. 3N, the package is sandwiched between the second driven roller 61 and the second drive roller 62 and conveyed backward. Then, as shown in FIG. 3O, the second driven roller 61 moves upward.

  Thereafter, the packaging body is formed by repeating the operations of FIGS. 3G to 3O.

  Hereinafter, the configuration of the film folding member 21 will be described more specifically.

  FIG. 4 is a perspective view seen from the front of the packaging device 10 of FIG. In FIG. 4, the state which remove | excluding the supply part 12 from the packaging apparatus 10 is shown. The film folding member 21 as a whole has a substantially trapezoidal shape with a parallel short side positioned at the front end and a parallel long side positioned at the rear end. The film folding member 21 is divided into two in the Y direction and is separated from each other. The first portion 22 that folds one side of the film strip 101 and the other side of the film strip 101. And a second portion 23 that folds back the side portion.

  The first portion 22 includes a first support portion 22 a that supports the film strip 101 for folding back, and a first folding portion 22 b for folding the film strip 101. The first support portion 22a has a substantially trapezoidal shape in which a parallel short side is located at the front end and a parallel long side is located at the rear end. The first folded portion 22b has a substantially triangular shape in which one vertex is located at the front end and one side is located at the rear end. The first support portion 22 a and the first folded portion 22 b are formed so as to be continuous at the side edge of the film folding member 21.

  The second portion 23 also has the same shape as the first portion. That is, a second support portion 23 a that supports the film strip 101 for folding back and a second folding portion 23 b for folding the film strip 101 are provided. The second support portion 23a has a substantially trapezoidal shape in which a parallel short side is located at the front end and a parallel long side is located at the rear end. The second folded portion 23b has a substantially triangular shape in which one of the vertices is located at the front end and one of the sides is located at the rear end. The second support portion 23 a and the second folded portion 23 b are formed so as to be continuous at the side edge of the film folding member 21.

  The front end of the first support portion 22a of the first portion 22 and the front end of the second support portion 23a of the second portion 23 are positioned so as to be aligned in the X direction, and the rear end position of the first support portion 22a The rear end position of the second support portion 23a is positioned so as to be aligned in the X direction. Further, the rear end of the first folded portion 22b of the first portion 22 and the rear end of the second folded portion 23b of the second portion 23 are positioned so as to be aligned in the X direction.

  The outer surface (lower surface) 22a2 of the first support portion 22a of the first portion 22 and the outer surface (lower surface) 23a2 of the second support portion 23a of the second portion 23 are located on the same plane, and the first support portion 22a. The inner surface (upper surface) 22a1 and the inner surface (upper surface) 23a1 of the second support portion 23a are located on the same plane. Since the thickness (vertical length) of the first portion 22 is larger than the thickness (vertical length) of the second portion 23, the first folded portion 22b of the first portion 22 is The second folded portion 23b is positioned above the second folded portion 23b (in the direction approaching the welding roller 31), and a part of the first folded portion 22b extends vertically from the second folded portion 23b. It is located overlapping.

  As described above, the first portion 22 and the second portion 23 are separate bodies. In the rear portion of the first support portion 22a of the first portion 22, two long holes 22c are formed that are aligned in the Y direction and extend in the Y direction. The 1st support part 22a is fixed to the flame | frame 10a of the packaging apparatus 10 with the screw | thread 24 which penetrates the elongate hole 22c up and down. By loosening the screw 24 and changing the position of the long hole 22c relative to the screw 24 in the Y direction, the first support portion 22a can move in the Y direction. As a result, the first portion 22 can move independently in the Y direction separately from the second portion 23.

  Two long holes 23c that are aligned in the Y direction and extend in the Y direction are formed in the rear portion of the second support portion 23a of the second portion 23. The 2nd support part 23a is fixed to the flame | frame 10a of the packaging apparatus 10 with the screw | thread 25 which penetrates the long hole 23c up and down. By loosening the screw 25 and changing the position of the elongated hole 22c with respect to the screw 25 in the Y direction, the second support portion 23a is movable in the Y direction. As a result, the second portion 23 can move in the Y direction independently of the first portion 22.

  A film support member 27 is attached to the second folded portion 23 b of the second portion 23 via an attachment member 26. The film support member 27 is provided so as to be positioned below a portion where the welding roller 31 moves downward and is in contact with the film strip 101. The film support member 27 is a rectangular plate-like member having a long side in the Y direction, and the rear end of the first folded portion 22 b of the first portion 22 and the second folded portion 23 b of the second portion 23 and the film support member 27. A gap D is formed between the front end of the two. The gap D has at least the thickness of the film strip 101. Here, the thickness of the film strip 101 is 20 to 60 μm, and preferably 30 to 50 μm. As a result, the gap D is 60 μm or more, and the gap D is preferably 10 mm or more in order to make the conveyance load caused by the bending of the film strip 101 almost impossible. The film support surface (upper surface) 27a of the film support member 27 and the lower surface 23b2 of the second folded portion 23b are located on the same plane.

  FIG. 5 is an enlarged view of the film folding member 21 portion of FIG. As shown in FIG. 2, the film strip 101 drawn upward from the sheet roll 100 is sent to the film folding member 21 via a plurality of support rollers 113, 114, 115. Then, as shown in FIG. 5, the film strip 101 is folded back from the front to the rear by the film folding member 21, and the side ends of the film strip 101 are overlapped to form a folded portion. It has become so.

  FIG. 6 is a diagram illustrating a state in which the side end portions of the film strip 101 are overlapped by the film folding member 21 to form a folded portion 101e. The Y-direction central portion of the film strip 101 is conveyed forward along the lower surface 22a2 of the first support portion 22a and the lower surface 23a2 of the second support portion 23a as indicated by the arrow A1, and is indicated by an arrow A2. As shown, the front end of the first support portion 22a and the front end of the second support portion 23a are folded back from the front to the rear, along the upper surface 22a1 of the first support portion 22a and the upper surface 23a1 of the second support portion 23a. It is conveyed toward. And as shown by arrow A3, it is conveyed toward the back below the folding part 101e.

  One side of the film strip 101 in the Y direction is conveyed forward along the lower surface 22a2 of the first support 22a, as indicated by arrow B1, and as indicated by arrow B2, 1 at the side end of the support portion 22a is folded back from the side outward to the side inward, conveyed toward the side inward along the upper surface 22b1 of the first turn-up portion 22b, and as shown by the arrow B3, The first folded portion 22b is folded backward at the side end. And as shown by arrow B4, it is conveyed toward back along the lower surface 22b2 of the 1st folding | turning part 22b. In other words, one side of the film strip 101 in the Y direction is folded above the central portion in the Y direction of the film strip 101 and conveyed backward.

  The side of the film strip 101 on the other side in the Y direction is conveyed forward along the lower surface 23a2 of the second support 23a as indicated by the arrow C1, and as indicated by the arrow C2, as shown by the arrow C2. 2 Folded from the lateral outer side to the lateral inward at the side end of the support portion 23a, conveyed toward the lateral inward along the upper surface 23b1 of the second folded portion 23b, and as indicated by an arrow C3, The second folded portion 23b is folded back at the side end. And it is conveyed toward back along the lower surface 23b2 of the 2nd folding | turning part 23b, as shown by arrow C4. That is, the other side portion in the Y direction of the film strip 101 is folded upward above the central portion in the Y direction of the film strip 101 and conveyed backward.

  Since the first folded portion 22b of the first portion 22 is located above the second folded portion 23b of the second portion 23, the side portion on one side in the Y direction of the film strip 101 is the film. A folded portion 101e, which is positioned above the other side portion in the Y direction of the belt-like body 101, is overlapped with the vicinity of one side end 101c above the vicinity of the other side end 101d. It is formed.

  The film support member 27 is located above the center in the Y direction of the film strip 101 conveyed rearward, and is on one side in the Y direction of the film strip 101 conveyed rearward. It is located below the side and the other side. And the Y direction length of the film support member 27 is formed so that it may become larger than the Y direction length of the folding part 101e. Accordingly, the film support member 27 serves as a support plate for the welding roller 31 to press the folding portion 101e when the welding roller 31 welds the folding portion 101e in the X direction.

  According to the packaging device 10 configured as described above, the following effects can be exhibited.

(1) When the welding roller 31 presses the film strip 101, the film support member 27 supports the film strip 101, so that the welding is performed appropriately without being affected by the thickness or surface shape of the packaged object. be able to.

(2) Since the first part 22 and the second part 23 are separate bodies, and the first part 22 and the second part 23 are each movable in the Y direction, The first portion 22 and the second portion 23 can be moved according to the direction length. As a result, even if the Y-direction length of the article to be packaged changes, it is not necessary to prepare a plurality of types of film folding members, and a single type of film folding member can be used.

(3) Since the film support member 27 is attached to the second folded portion 23b of the second portion 23, when the second portion 23 is moved in the Y direction, the film support member 27 is similarly moved in the Y direction. Therefore, the film supporting member 27 can be easily moved to a position suitable for welding the folded portion 101e.

(4) The film support member 27 is positioned behind the first folded portion 22b of the first portion 22 and the second folded portion 23b of the second portion 23, and the rear end and the second folded portion 23b of the first folded portion 22b. A gap D is formed between the rear end and the front end of the film support member 27, and the gap D has at least the thickness of the film strip 101. As a result, since the film support member 27 is located in the vicinity of the rear of the first portion 22 and the second portion 23, the film folding member having a compact length in the front-rear direction while maintaining smooth conveyance of the film strip 101. 21 can be obtained.

(5) The upper surface 27a of the film support member 27 and the lower surface 23b2 of the second folded portion 23b of the second portion 23 are located on the same plane. As a result, the position of the folded portion 101e with respect to the packaged object can be made constant, that is, the distance between the packaged object and the folded part 101e can be made constant, so that the fixed interval is maintained regardless of the thickness of the packaged object. In such a state, the object to be packaged can be stably inserted into the film strip 101.

(Another embodiment)
In the above embodiment, the film support surface (upper surface) 27a of the film support member 27 and the lower surface 23b2 of the second folded portion 23b are located on the same plane, but the vertical position of the film support member 27 is as follows. May be changed.

  As shown in FIG. 6, the transport distance (first transport) of the side of the film strip 101 from when the film strip 101 is received by the first portion 22 until it reaches the film support surface 27 a of the film support member 27. Distance) L is defined by the sum of distance L1, distance L2, distance L3, distance L4, and distance L5. On the other hand, the transport distance (second transport distance) M of the side of the film strip 101 from when the film strip 101 is received by the second portion 23 until reaching the film support member 27 is a distance M1, a distance M2, It is defined by the sum of the distance M3, the distance M4, and the distance M5. Here, since the thickness (vertical length) of the first portion 22 is larger than the thickness (vertical length) of the second portion 23, the distance L2 is larger than the distance M2. The distance L1 and the distance M1 are equal, the distance L3 and the distance M3 are equal, and the distance L4 and the distance M4 are equal.

  FIG. 7 is a schematic diagram showing the positional relationship between the first folded portion 22 b of the first portion 22, the second folded portion 23 b of the second portion 23, and the film support member 27. As shown in FIG. 7, the vertical position of the film support member 27 is changed. Specifically, by moving the film support member 27 upward, the distance M5 is made larger than the distance L5, and the distance L2 and the distance are changed. By making the sum of L5 equal to the sum of the distance M2 and the distance M5, the first transport distance L and the second transport distance M can be made equal.

  According to the above configuration, by arranging the film support member 27 so that the first transport distance L and the second transport distance M are equal, the film strip shape that is generated when the transport distances on both sides of the film strip 101 are different from each other. The slack and wrinkle of the body 101 can be prevented.

  In the said embodiment, although the 1st part 22 and the 2nd part 23 of the film folding member 21 are respectively independent and can be moved by the manual operation in Y direction, they can move interlockingly. It may also be possible to move automatically. When the first portion 22 and the second portion 23 can move in conjunction with each other, when one of the first portion 22 and the second portion 23 is moved a predetermined distance outward in the Y direction, the first portion 22 and the second portion 23 are moved. The other of the portion 22 and the second portion 23 is automatically moved by the same predetermined distance outward in the Y direction, and one of the first portion 22 and the second portion 23 is moved by the predetermined distance inward in the Y direction. It is preferable that the other of the first portion 22 and the second portion 23 automatically moves the same predetermined distance inward in the Y direction.

  In the above embodiment, the film support member 27 is attached to the second folded portion 23b of the second portion 23 via the mounting member 26, but may be directly attached to the second folded portion 23b. Further, the film support member 27 is not limited to the second folded portion 23 b, and may be attached to other portions of the second portion 23 or the first portion 22, and attached to any portion of the film folding member 21. It may also be attached to a member other than the film folding member 21. However, the film support member 27 is located above the central portion in the Y direction of the film strip 101 conveyed rearward, and one of the film strips 101 conveyed in the rear direction in the Y direction. It is necessary to be located below the side part on the side and the side part on the other side.

  In the above-described embodiment, the folding unit 101e is formed in the horizontal direction, and the welding roller 31 is pressed from the upper side to the lower side with respect to the folding unit 101e. It is also possible to apply to the structure which is formed in the vertical direction and presses the welding roller from the side against the folded portion.

  The present invention is not limited to the configuration described in the above embodiment, and can include various modifications that can be considered by those skilled in the art without departing from the content described in the claims.

  In the present invention, it is possible to provide a film folding member that can be appropriately welded without being affected by the thickness, surface shape, etc. of the article to be packaged, and a packaging device provided with the film folding member. Is big.

DESCRIPTION OF SYMBOLS 10 Packaging apparatus 10a Frame 11 Roll mounting part 111 Support rod 112 Support roller 12 Supply part 121 Supply stand 122 Side plate 13 Packaging part 131 Conveying surface 14 Discharge part 141 Discharge base 142 Holding member 21 Film folding member 22 1st part 22a 1st Support part 22b 1st return part 22c long hole 23 2nd part 23a 2nd support part 23b 2nd return part 23c long hole 24 screw 25 screw 26 mounting member 27 film support member 30 welding unit 31 welding roller 40 1st conveyance unit 41 First driven roller 42 First driving roller 50 Fusing unit 51 Fusing member 60 Second conveying unit 61 Second driven roller 62 Second driving roller 101 Film strip 101c One side end 101d The other side end 101e Folding part 110 Package 90 0 Packaging 91 Packaging object 92 Film strip 92a Front end sealing portion 92b Rear end sealing portion
92c One side end 92d The other side end 92e Folding part 92f Vertical seal part

Claims (6)

A film folding member that folds both sides of the film strip and overlaps both side edges of the film strip to form a folded portion,
A first portion that folds one side of the film strip;
A second portion that folds back the other side of the film strip;
A film support member that supports the folded portion formed by the first part and the second part,
The film folding member, wherein the film supporting member is provided so as to sandwich the folded portion between the film supporting member and a welding member for welding the folded portion. The first part and the second part are separate bodies,
The film support member is attached to the first part or the second part,
The film folding member according to claim 1, wherein each of the first portion and the second portion is movable in a direction orthogonal to a conveyance direction of the folding unit. The first portion includes a first support part for supporting the film strip to be folded back, and a first folding section for folding the film strip.
The second portion includes a second support portion that supports the film strip to fold back, and a second fold back portion that folds the film strip,
The film support member is located downstream of the first folded portion and the second folded portion in the conveying direction of the folded portion, and at least the film with respect to the first folded portion and the second folded portion. The film folding member of Claim 1 or 2 which has a clearance gap in the said conveyance direction only by the thickness of a strip | belt shaped object. The first folded portion is positioned outward from the second folded portion,
The film folding member according to claim 3, wherein a film supporting surface of the film supporting member is located on the same plane as an inner surface of the second folded portion. The first folded portion is positioned outward from the second folded portion,
The first conveyance distance of the side part of the film strip from the time when it is received by the first part to the time when it reaches the film support surface of the film support member, and the time when the film is received by the second part The film folding member according to claim 3, wherein the position of the film supporting member is set so that the second transport distance of the side portion of the film strip until the time is equal.   A packaging apparatus provided with the film folding member of any one of Claims 1-5.

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