JP2016050031A - Reverse pillow type packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of defects of center-sealing performed by overlapping both end edge parts in the width direction of a film.SOLUTION: A reverse pillow type packaging machine which performs center sealing by overlapping both end edge parts Xa in the width direction of a transported film X and packaging a packaged body in the film X having a tube-like shape includes a film regulation device 51 which regulates a manner of a seal planned part Xb to be center-sealed in the film X transported in an overlapping state, at an upstream side of a center seal part 34 for performing center-sealing. The film regulation device 51 has a passage part 52 for passing the seal planned part Xb in a manner of being center-sealed while contacting the seal planned part Xb, and a pressing part 53 suppressing floating of a lower side part from the seal planned part Xb. The passage part 52 and the pressing part 53 are constituted of three rod bodies 54.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a reverse pillow type packaging machine for pillow-packaging various types of packages, and more particularly to a reverse pillow type packaging machine capable of suppressing the occurrence of a center seal defect.

  The reverse pillow type packaging machine carries the center seal by superimposing both edges in the width direction of the film while transporting the wound roll film together with the packaged body, and wraps the film inside. End seal and cut at regular intervals in a tube shape (cylinder shape) with the body loaded.

  As such a reverse pillow type packaging machine, there is, for example, the one disclosed in Patent Document 1 below. In this reverse pillow type packaging machine, the drawn film is passed through a film shaping plate and deformed into a U shape, and then the center seal, the end seal and the cut are sequentially performed as described above. Center sealing is performed with a sealing roller downstream from the pinch roller while feeding both ends of the film in the width direction with the pinch roller being overlapped.

  As shown in FIG. 11, it is an originally desired center seal state in which both edge portions Xa of the film X are overlapped and sealed in a two-layered state.

  However, before the center seal, the film is inverted and then deformed by the film shaping plate, and the edges are overlapped after placing the packaging body. In addition, since the film is mainly fed by a pinch roller and a conveyor, an unpredictable distorted load is applied to the film, and as shown in FIG. 12, the lower side of the center seal position at both ends Xa of the film. In some cases, the portion 101 is lifted and a desired center seal cannot be obtained. Further, if the defective portion of the center seal overlaps with the end seal position, the end seal may be defective.

  Until now, there has been no technique for suppressing such a defective center seal.

JP-A-8-133242

  Accordingly, the main object of the present invention is to be able to suppress the occurrence of a defective center seal.

  Means therefor is an inverted pillow type packaging machine that overlaps both edges in the width direction of a film to be conveyed and performs center sealing, and wraps a packaged body in a tube-shaped film, Provided on the upstream side of the center seal portion that performs sealing is provided with a film restricting device that restricts the form of the planned seal portion where the center seal is performed at both end edges of the film conveyed in an overlapping state, the film restricting device A reverse pillow type packaging machine having a passage portion that passes the planned seal portion in a form in which the center seal is made while contacting the planned seal portion, and a pressing portion that suppresses lifting of a lower portion from the planned seal portion.

  “Contacting the planned seal portion” means contacting one side or both sides of the planned seal portion, and “center seal is formed” means that both end edges of the film are stretched and overlapped to form a double as a whole. Refers to the form.

  In this configuration, when the film is transported to the film regulating device provided on the upstream side of the center seal portion in a state where both edges of the film overlap each other, the planned seal portion is sent in a form in which the center seal is made while contacting the passage portion. At this time, even if the part below the planned seal part is distorted and tries to float up, the presser part presses the part that tries to lift up in cooperation with the passage part to prevent the seal from rising. Holds the shape of the planned portion. The center seal is made immediately in this state.

  According to this invention, since the form of the planned sealing part of the film is restricted to the form in which the center seal is made immediately before the center seal, a desired center seal can be stably performed. For this reason, generation | occurrence | production of a defect can be suppressed.

The perspective view which shows schematic structure of a reverse pillow type packaging machine. The top view which shows schematic structure of a tube formation part. Sectional drawing which shows schematic structure of a tube formation part. The top view which shows schematic structure of the drive part of a tube formation part. The perspective view of a film control apparatus. The disassembled perspective view of a film control apparatus. The front view of a rod. Sectional drawing of the state which looked at the film control apparatus from the center seal | sticker part side to the upstream. The top view which shows the upstream of a center seal part. The front view of an action state. Sectional drawing which shows a desirable center seal | sticker. Sectional drawing which shows the conventional problem.

  An embodiment for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a schematic structure of an inverted pillow type packaging machine 11 (hereinafter referred to as “packaging machine”). As shown in this figure, the packaging machine 11 is configured to transform the film X to be conveyed from a flat state into a U-shape and to receive a packaged body 12 and to receive both end edges Xa in the width direction of the film X. A tube forming part 13 that is center-sealed by overlapping and forming a tube shape, and a seal cut part 14 that performs end sealing and cutting at regular intervals on the tube-shaped film X for each portion filled with the packaged body Y In order from the upstream side.

  The film shaping unit 12 has a known structure and includes a guide plate 21 that guides the film X supplied from below the conveyance path 12 a and a shaping plate 22 that deforms the film X in the next stage of the guide plate 21.

  The guide plate 21 has a trapezoidal plate shape and is mounted so as to extend obliquely from below toward the entrance of the conveyance path 12a. The lower end side portion of the guide plate 21 is wider than the supplied film X, and the upper end portion connected to the transport path 12a is narrower than that. In the vicinity of the lower end portion of the guide plate 21, a guide roller 23 for changing the drawing direction of the film X is provided.

  The shaping plate 22 is provided in a pair on the left and right on the conveyance path 12a continuing from the guide plate 21, and has a substantially right triangular plate-like standing wall 22a in which the upstream side in the conveyance direction is low and the downstream side is high. The shaping plate 22 is attached so that the position in the conveyance direction and the position (interval) in the left-right direction on the conveyance path 12a can be changed. This is because adjustment is performed so that an appropriate operation can be performed according to the width of the film X to be used, the size of the package body Y, and the like.

  The film X guided to the guide plate 21 and the shaping plate 22 is deformed from a flat state as described above into a U-shape with the inner surface of the film X facing up and both sides in the width direction. Is done.

  The tube forming unit 13 gradually closes and overlaps both edge portions Xa of the film X, and transports the film X in the overlapped state to perform center sealing. The tube forming portion 13 is supported above the conveyance path 13a, is held by the housing 13b, and is integrated into one. The tube forming portion 13 extends in a triangle from the upstream side to the downstream side with respect to the upstream and downstream pinch portions 31 and 32 and the upstream pinch portion 31, and both end edges Xa of the film X And a center seal portion 34 that performs center sealing between the upstream pinch portion 31 and the downstream pinch portion 32. The two pairs of pinch portions 31 and 32 and the center seal portion 34 are arranged in a substantially straight line.

  As shown in FIGS. 2 and 3, the restriction plate 33 includes a triangular plate-shaped main body portion 33 a and two adjustment members 33 b that are movably attached to both sides of the main body portion 33 a. By changing the interval between the adjusting members 33b, the tip angle of the triangle formed by the entire regulating plate 33 facing the pinch portion 31, that is, the angle formed by the adjusting members 33b can be adjusted appropriately according to the width of the film X.

  The pinch portions 31 and 32 and the center seal portion 34 have a known structure. That is, the pinch portions 31 and 32 are configured by a pair of pinch rollers 31a, 31b, 32a, and 32b, and the center seal portion 34 is configured by a pair of seal rollers 34a and 34b.

  These pinch rollers 31a, 31b, 32a, 32b and seal rollers 34a, 34b are rotatably held. The pinch rollers 31a, 31b, 32a, 32b and the seal rollers 34a, 34b have a gear 35 on the upper peripheral surface, and the gear 35 meshes between the paired ones in a direction to send the film X in the transport direction. It is made rotatable.

  The pinch rollers 31a, 31b, 32a and 32b and the seal rollers 34a and 34b have a rotating shaft 36 extending upward, and this rotating shaft 36 is indirectly held with respect to a frame body 37 constituting the housing 13b. ing. The rotational force applied to the rotary shaft 36 is input via a sprocket 38 provided at the upper end of the rotary shaft 36. As shown in FIG. 4, among the pair of rollers (pinch rollers 31a, 31b, 32a, 32b, seal rollers 34a, 34b), the pinch rollers 31a, 32a located on one side in the overlapping direction of the film X and the seal A sprocket 38 is provided at the upper end of the rotating shaft 36 of the roller 34a, and a chain 39 is stretched around these sprockets 38. The sprocket 38 and pinch rollers 31a and 32a below it and a seal are rotated by the rotation of the sprocket 40a of the motor 40. The roller 34a is configured to rotate in the direction in which the film X is conveyed. Since the pinch rollers 31a, 31b, 32a, 32b and the seal rollers 34a, 34b have a gear 35, the pinch rollers 31b, 32b and the seal roller 34b located on the other side in the overlapping direction of the film X also carry the film X. Rotate in the direction you want.

  The two pairs of pinch rollers 31a, 31b, 32a, and 32b have sprockets 38 for rotational driving so that both ends Xa of the film X can be sandwiched when packaging is started. The pinch rollers 31b and 32b on the driven side, that is, the driven side are tilted in a direction away from the state in contact with the pinch rollers 31a and 32a on the driving side. That is, as shown in FIGS. 2 and 3, the holding portion 37 a that rotatably holds the rotating shaft 36 having the driven side pinch rollers 31 b and 32 b is attached to the frame body 37 so as to be rotatable by a predetermined angle. . The holding portion 37a is provided with a handle 37b so that the driven side pinch rollers 31b and 32b can be separated from the driving side pinch rollers 31a and 32a by the rotation of the handle 37b. The holding portion 37a is urged by a spring 37c provided between the holding body 37a and the pinching rollers 31a and 32a on the driving side.

  The film regulating device 51 provided on the upstream side of the center seal portion 34 is configured as shown in FIG. That is, the passage portion 52 that passes the planned seal portion Xb while being in contact with the planned seal portion Xb (refer to FIG. 3) where the center seal is performed, and the presser that suppresses the lifting of the lower portion from the planned seal portion Xb Part 53.

  The passage portion 52 meanders the planned seal portion Xb, and the pressing portion 53 is formed integrally or separately at the lower end of the portion forming the passage portion 52. Since the planned sealing portion Xb meanders, both side surfaces in the overlapping direction of the planned sealing portion Xb are in contact with the inner surface of the passage portion 52.

  The passage portion 52 shown in FIG. 5 includes three rod bodies 54 arranged in parallel vertically downward. These rods 54 are disposed to form a passage portion 52 and constitute a pressing portion 53. Specifically, as shown in FIG. 6, the film restricting device 51 includes a fixed metal fitting 51a and a movable metal fitting 51b.

  The fixed-side metal fitting 51a includes a rectangular-plate-shaped fixed-side support plate 55 that is long in the film X conveyance direction, and the above-described two rod bodies 54 that are suspended from the lower surface of the fixed-side support plate 55. . One end portion in the longitudinal direction of the fixed-side support plate 55 has a long hole 55a for fixing to be screwed. The long hole 55 a is long in the longitudinal direction of the fixed side support plate 55. The rod body 54 is formed of a round bar having a circular cross section. That is, the side surface of the rod body 54 that is in contact with the planned sealing portion Xb of the film X being conveyed is a curved surface.

  The movable-side metal fitting 51b includes the movable-side support plate 56 and the above-described single rod body 54 that is suspended from the lower surface of the distal end of the movable-side support plate 56. The movable side support plate 56 is the same as the fixed side support plate 55 and is formed in a longer rectangular plate shape in the transport direction of the film X as a whole, but is formed longer than that, and a fixing portion 56a for fixing is provided at the rear end. And a distal end portion 56b extending in the lateral direction. A rod 54 is provided at the tip 56b. The fixing portion 56a is erected upward, and a long hole 56c for fixing to be screwed is formed. Unlike the long hole 55a formed in the fixed side support plate 55 of the fixed side metal fitting 51a, the long hole 56c is a long hole 56c long in the width direction of the movable side support plate 56.

  The rod body 54 constitutes a pressing portion 53 at the lower end. That is, the lower end portion itself is the pressing portion 53. As shown in FIG. 7, the pressing portion 53 has a circular horizontal surface 53 a that is smaller than the cross section of the rod body 54 on the lower end surface. The horizontal plane 53a is parallel to the film X conveyance direction. A convex curved surface 53b is formed between the horizontal surface 53a and the side surface so as to have a corner radius.

  As shown in FIGS. 2 and 3, the film restricting device 51 includes a horizontal rail 37 d formed between the pinch portion 31 on the upstream side of the frame body 37 and the center seal portion 34. As shown in FIGS. 2, 3, and 8, the movable side metal fitting 51 b is fixed to the lower surface of the fixed side holding portion 37 a that rotatably holds the driven side pinch roller 31 b of the upstream side pinch portion 31. It is fixed to the side surface on the downstream side in the transport direction. And the rod 54 part which is the principal part of the film control apparatus 51 is supported in the position near the upstream of the center seal | sticker part 34, ie, the seal rollers 34a and 34b.

  FIG. 8 shows a state where the film regulating device 51 is viewed from the seal rollers 34a and 34b to the upstream side.

  As shown in FIG. 9, the three rods 54 are positioned at the upstream side close to the seal rollers 34a and 34b, and the two pieces of the fixed-side metal fitting 51a so that the planned seal portion Xb meanders as described above. The rod body 54 of the movable side metal fitting 51b is fixed so as to slightly bite in an intermediate position between the rod bodies 54. For this reason, when the fixed metal fitting 51a and the movable metal fitting 51b are fixed, it is necessary to fix the distal end portion 56b of the movable metal support plate 56 of the movable metal fitting 51b lower than the fixed metal support plate 55 of the fixed metal fitting 51a. .

  Further, the lower ends of the rod bodies 54, that is, the lower end positions of the pressing portions 53 are aligned in all the rod bodies 54. As shown in FIG. 8, the alignment position is set slightly below the sealing position of the sealing rollers 34a and 34b. For this reason, the rod body 54 of the movable metal fitting 51b is shorter than the rod body 54 of the fixed metal fitting 51a.

  Although the thickness and length of the rod 54 are appropriately set, in other words, the thickness of the rod is, for example, about 6 mm to 10 mm, and preferably about 8 mm. The depth at which the rod 54 of the movable metal fitting 51b slightly bites between the two rods 54 of the fixed metal fitting 51a is appropriately determined according to the thickness and rigidity of the film X, the thickness and the interval of the rod 54, and the like. For example, it can be set to about 1 mm to 5 mm.

  Since the fixed metal fitting 51a and the movable metal fitting 51b are fixed via the elongated holes 55a and 56c, the position of the rod 54, the width of the passage portion 52, the degree of meandering, and the like can be adjusted. The degree of meandering can also be set in the positional relationship between the center seal part 34 and the pinch parts 31 and 32.

  The seal cut portion 14 has a known configuration and may employ a rotation method in addition to the box motion method as shown in FIG. Further, the end seal may be a double-sided seal in addition to the single-sided seal as shown in the illustrated example. The packaging bag Z loaded with the packaged body Y processed by the seal cut unit 14 is carried out by the carry-out conveyor 41.

  As is well known, the packaging machine 11 is controlled such that when the packaged body Y is placed on the film shaping unit 12, the film X is conveyed by a predetermined length, and the tube forming unit 13 and the seal cut unit 14 are driven.

  In the packaging machine 11 configured as described above, the package body Y is packaged as follows.

  First, the film X is attached to the packaging machine 11. The leading end of the film X is pulled out and set on the tube forming portion 13 through the guide plate 21 and the shaping plate 22. When the driven-side pinch rollers 31b and 32b are separated from the driving-side pinch rollers 31a and 32a, the rod body 54 of the movable metal fitting 51b of the film regulating device 51 is also separated from the fixed metal fitting 51a. When the driven pinch rollers 31b and 32b are returned to their original positions after the film X is put in the gap, the planned seal portion Xb of the film X is sandwiched between the pinch rollers 31a, 31b, 32a and 32b, and the film restricting device 51 It will be in the channel | path part 52, ie, the state pinched | interposed into the rod body 54. FIG. At this time, it is made into a state without wrinkles or distortion so that the planned sealing portion Xb of the film X is in a form suitable for center sealing.

  Next, the packaging machine 11 is driven. When the packaged body Y is placed on the film shaping unit 12, the film X is conveyed for a predetermined length, and the packaged body Y enters the tube forming unit 13. In the tube forming part 13, the tube X is conveyed by the pinch parts 31 and 32 and the conveyor constituting the conveying path 13 a, and both end edges Xa of the film X gradually approach by the restriction by the restriction plate 33, and the upstream side It overlaps at the pinch part 31. In this way, the planned seal portion Xb where the center seal is performed is obtained. The part to be sealed Xb has overlapping portions, and is double as a whole.

  Subsequently, the planned sealing portion Xb passes through the film regulating device 51. In the film restricting device 51, the passage portion 52 and the pressing portion 53 configured by the rod body 54 send the film X to the center seal portion 34 while restricting the film X to a form in which the center seal is performed.

  That is, the scheduled seal portion Xb passes through the passage portion 52 while meandering as shown in FIG. Both side surfaces of the planned sealing portion Xb are in contact with the inner surface of the passage portion 52 so as to extend straight in the longitudinal direction of the rod body 54, that is, in the vertical direction. As a result, if there are distortions or wrinkles in the planned sealing portion Xb and the lower portion thereof, they are removed. Even if a distortion occurs in the upstream pinch portion 31 portion or the planned seal portion Xb after passing therethrough, at least the strain generated in the planned seal portion Xb is removed. As shown in FIG. 10, the inner surface of the passage portion 52 is formed even if a situation occurs in which the portion below the planned seal portion Xb is distorted and floats and rises and enters the planned seal portion Xb region. In contact with both sides of the planned seal portion Xb, in combination with the regulation of the planned seal portion Xb, the pressing portion 53 presses the portion to be lifted. The horizontal surface 53a of the pressing portion 53 is pressed by the surface, and there is no possibility that the film X is wrinkled or damaged. In addition, the convex curved surface 53b relaxes the contact with the film X, smoothes the distortion, and avoids the risk of unexpectedly wrinkling or damaging the film X.

  By passing through the film restricting device 51, the planned seal portion Xb is conveyed as it is if there is no distortion, and if there is distortion, the center seal portion 34 performs center sealing immediately after that.

  For this reason, a desired center seal as shown in FIG. 11 can be performed. Since the center seal can be accurately performed, the end seal in the seal cut portion 14 at the subsequent stage can be accurately performed as desired.

  Therefore, packaging without a sealing failure can be realized.

  In particular, the passage portion 52 meanders the planned seal portion Xb, and since both side surfaces of the planned seal portion Xb are in contact with the inner surface of the passage portion 52, the planned seal portion Xb can be corrected more reliably.

  Since the pressing portion 53 has the horizontal surface 53a and the convex curved surface 53b, there is no fear of accidental scuffing or damage, and necessary lifting can be prevented.

  Moreover, since the holding | suppressing part 53 is comprised by the lower end part of the rod 54 which is a site | part which forms the channel | path part 52, a structure can be simplified rather than providing a separate member.

  Since the passage portion 52 is constituted by three rod bodies 54 and the lower end portions thereof are used as the pressing portions 53, the configuration is simpler. In addition, since the position of both the fixed side support plate 55 and the movable side support plate 56 that support the rod body 54 can be adjusted, it is possible to flexibly respond to differences in the thickness and rigidity of the film X. For this reason, a use range can be expanded.

  When the film X is attached to the packaging machine 11, the movable bar 54 of the film regulating device 51 is configured to be separated simultaneously with the pinch rollers 31 and 32, so that workability is good.

  The above configuration is one form for carrying out the present invention, and the present invention is not limited only to the above-described configuration, and other configurations can be adopted.

  For example, the configuration for supporting the rod body 54 constituting the film regulating device 51, in the above-described example, the fixed side support plate 55 and the movable side support plate 56 can be appropriately configured according to the attachment target. Instead of separating at the same time as the pinch roller as described above, it may be possible to separate the pinch roller alone, or it may be configured not to separate like a pinch roller.

  Further, the pressing portion 53 can be formed into a tapered shape without the convex curved surface 53b, or can be formed into a hemispherical surface without the horizontal surface 52a.

  The rod body 54 constituting the film regulating device 51 may be composed of two or three or more.

  The film regulating device can also be formed in a block shape having a groove-shaped passage portion.

DESCRIPTION OF SYMBOLS 11 ... Reverse pillow type packaging machine 34 ... Center seal part 51 ... Film control apparatus 52 ... Passage part 53 ... Holding part 53a ... Horizontal surface 54 ... Bar body X ... Film Xa ... Edge edge part Xb ... Planned seal part Y ... Packaged body

Claims (8)

It is a reverse pillow type packaging machine that overlaps both edge portions in the width direction of the film to be conveyed, performs center sealing, and wraps the packaged body in a tube-shaped film,
On the upstream side of the center seal portion that performs the center seal, a film regulating device that regulates the form of the planned seal portion where the center seal is made at both edge portions of the film conveyed in an overlapping state,
The film regulating device has an inverted pillow type having a passage portion that passes the planned seal portion while being in contact with the planned seal portion in a form in which the center seal is formed, and a pressing portion that suppresses lifting of a lower portion from the planned seal portion. Packaging machine. The reverse pillow type packaging machine according to claim 1, wherein the passage portion meanders the planned sealing portion. The reverse pillow type packaging machine according to claim 1 or 2, wherein the pressing portion is formed at a lower end of a portion forming the passage portion. The reverse pillow type packaging machine according to any one of claims 1 to 3, wherein the passage portion is configured by a plurality of bars arranged in parallel vertically downward. The passage portion is in contact with one side in the overlapping direction of the planned sealing portion, and is in contact with the other side in the overlapping direction of the planned sealing portion, with two rods spaced apart in the conveying direction, and the two on the one side The reverse pillow type packaging machine according to any one of claims 1 to 4, wherein the reverse pillow packaging machine is configured by a single bar positioned between the two bars. The reverse pillow type packaging machine according to claim 4 or 5, wherein the pressing portion is configured by a lower end portion of the rod body. The reverse pillow type packaging machine according to any one of claims 1 to 6, wherein the pressing portion has a horizontal plane parallel to the transport direction. The center seal portion for performing the center seal in the reverse pillow type packaging machine that wraps the packaged body in the tube-shaped film by superimposing both end edges in the width direction of the film to be conveyed and performing the center seal. Provided upstream,
A passage portion that passes the planned seal portion in a form where the center seal is made while contacting the planned seal portion where the center seal is made at both edge portions of the film conveyed in an overlapping state, and a lower side than the planned seal portion A film regulating device for a reverse pillow type packaging machine having a pressing portion that suppresses lifting of the portion.

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