Vertical bag making and filling equipment

Abstract

To provide a new, useful, vertical bag making and filling machine that includes a structure that replaces a bag making former and eliminates high-leveled skills and hunches, in addition, tedious fine tuning at the site, and yet achieves a cylinder shaping function that restricts the meandering of packaging material.SOLUTION: A pair of clasping guide pieces 19, 19 that guides an edge F1 on both sides in the width direction of packaging material F in the clasping direction is provided on the side of the upper end part of a bag making and filling chute 3. The pair of clasping guides 19, 19 are positioned in an inverted truncated shape, where the downstream side of the guiding surface narrows in the packaging material feeding direction. The clasping piece 19 has a cross section in an U-letter shape in the direction orthogonal to the packaging material feeding direction and has a guiding groove that opens on both sides of the bag making and filling chute 3 and the package material feeding direction, between which the edge F1 of the packaging material F follows and is fed downward, thereby allowing the packaging material F to be cylindrical and at the same time, restricting the meandering of the edge F1 automatically.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a vertical bag-making and filling apparatus that is characterized by vertically feeding a continuous strip-shaped packaging material downward in a bag-making and filling process. [Background technology]

[0002] In a vertical bag making and filling apparatus, as a continuous strip of packaging material pulled out from a packaging reel is sent downward along a bag making and filling chute, the edges on both sides of the width of the packaging material are joined together and formed into a cylindrical shape by a vertical sealing mechanism. Before and after the raw material is filled, horizontal seals are applied at intervals across the tubular packaging material and the material is cut in the middle of the horizontal seal, producing bags that are filled continuously or intermittently with raw material. A bag former is connected to the upstream side of the bag making and filling chute in the packaging material feed direction, and the packaging material is first curved along this bag former, and is sent to the bag making and filling chute in a nearly cylindrical shape. If the bag former is in an ideal shape, the packaging material is sent to the vertical sealing mechanism with both edges in the width direction aligned, so the vertical seal can be brought close to the edges. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-096837 A Summary of the Invention [Problem to be solved by the invention]

[0004] Bag formers are made up of complex three-dimensional shapes, and their formation requires the highly skilled and manual work of sheet metal craftsmen relying on intuition; however, there are fewer sheet metal craftsmen capable of making bag formers these days, and it is expected that the supply of bag formers will run out in the near future. Furthermore, even with currently manufactured bag-making machines, there are cases where even the smallest deviations can occur, and if left unchecked, the packaging material will not follow the bag-making machine in parts, and the tension will be loosened, causing it to meander, resulting in misaligned edges and poor sealing. For this reason, the deviations are corrected by fine-tuning the orientation of the bag-making machine at the installation site, but since it is integrated with the bag-making and filling chute and is large in both size and weight, the correction work is quite troublesome and nerve-wracking.

[0005] The present invention has been made in response to the above-mentioned problems in the conventional technology, and has an object to provide a new and useful vertical bag making and filling device that has a configuration that replaces a bag former, does not require advanced skill and intuition, and can achieve a tubular formation function that suppresses meandering of the packaging material, while eliminating the need for tedious fine adjustments on-site. [Means for solving the problem]

[0006] The present invention has been made to solve the above problems, and the invention of claim 1 relates to a vertical form-fill-seal device in which, when a continuous strip-shaped packaging material is pulled out from a packaging material reel and sent downward while being tensioned and made to follow the arcuate outer surface of a bag-forming and filling chute, both widthwise edges of the packaging material are joined together and formed into a cylindrical shape by a vertical sealing mechanism, The bag making and filling chute is provided at the side of the upper end thereof. Width of packaging material The bag-making and filling chute has a pair of joining guide pieces that guide both edge portions in a joining direction, the pair of joining guide pieces having guide surfaces arranged in an inverted V-shape that narrows toward the downstream side in the packaging material feed direction, and each joining guide piece has a U-shaped cross section in a direction perpendicular to the packaging material feed direction, and is provided with a guide groove that is open on the arc outer surface side and on both sides in the packaging material feed direction.Furthermore, a tension adjusting member is provided on the opposite side of the pair of joining guide pieces across the bag-making and filling chute, and the tension adjusting member has a tension surface portion whose undulating angle from the bag-making and filling chute is adjustable, and when the packaging material is in a state where it is bulged outward along the outer surface of the curved outer surface of the undulating tension surface portion of the bag-making and filling chute, the pair of guide surfaces that define the guide groove are passed between the pair of guide surfaces that define the guide groove. On both sides of the packaging materialThe packaging material is fed downward while being guided in the joining direction along the edge, and the packaging material is gradually formed into a cylindrical shape. On both sides of the packaging material When one side of the edge portion hits the groove bottom of the joint guide piece, On both sides of the packaging material The other side of the edge is pushed back. Width of packaging material This is a vertical bag making and filling device that is characterized by suppressing meandering of the edges on both sides.

[0007] The invention of claim 2 is a vertical bag making and filling apparatus as described in claim 1, characterized in that the packaging material receiving side, which corresponds to the upstream side of the guide groove of the folding guide piece in the packaging material feed direction, is tapered and expanded.

[0010] Claim 3 The invention is as follows: 1 or 2 In the vertical bag making and filling apparatus described in Surface tension part is a vertical bag making and filling apparatus characterized in that the bag making and filling member is formed in a tongue-shaped plate shape that converges toward the downstream side in the packaging material feeding direction.

[0011] Claim 4 The invention is as follows: 3 In the vertical bag making and filling apparatus described in any one of the above, the upper end of the bag making and filling chute is formed as a separate body from the rest of the bag making and filling chute as an attachment portion for a pair of seam guide pieces and a tension adjustment member, and is joined to the remaining bag making and filling chute so as to be axially connected and integrated.

[0012] Claim 5 The invention is as follows: 4 In the vertical form-fill-seal apparatus described in any one of the above, the lower end of the raw material input hopper is inserted in an almost upright position into the upper opening at the upper end of the bag-making and filling chute.

[0013] Claim 6 The invention is as follows: 5In the vertical bag making and filling apparatus described in any one of the above, the vertical sealing mechanism comprises a pair of feed rolls arranged above and below, with a vertical sealing means arranged between them, the upper pair of feed rolls being free rolls and the lower pair of feed rolls being drive rolls.

[0014] Claim 7 The invention is as follows: 6 In the vertical bag making and filling apparatus described in This vertical bag making and filling device is characterized in that it comprises a packaging reel composed of a drive roll, a dancer roll that moves back and forth in the vertical direction, and a free guide roll arranged above the bag making and filling chute, and the tension of the packaging material is maintained by the dancer roll moving up and down in response to changes in the length of the packaging material in the feed direction between the packaging material reel and the guide roll due to drive that includes alternative or partial overlapping of the drive roll on the vertical sealing mechanism side and the drive roll on the packaging material reel side.

[0015] Claim 8 The invention is as follows: 7 In the vertical bag making and filling apparatus described in This vertical bag making and filling device is characterized by having a contact rod that contacts the outer peripheral surface of the packaging roll wound around the packaging reel, and a motor adjustment means that uses the contact angle of the contact rod as an index to control the motor drive to keep the amount of packaging material pulled out constant. Effect of the Invention

[0016] The vertical bag making and filling apparatus of the present invention is equipped with a configuration that replaces a bag former, and can achieve a cylindrical forming function that suppresses meandering of the packaging material while eliminating the need for advanced skill and intuition, or even tedious fine-tuning on-site. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view of an entire vertical bag making and filling apparatus according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an enlarged perspective view of a main part of FIG. [Diagram 3] FIG. 3 is a side view of FIG. 2. [Figure 4] 3 is an enlarged perspective view of a portion relating to the bag making and filling chute in FIG. 2. [Diagram 5] FIG. 5 is a front view of FIG. [Figure 6] FIG. 5 is an exploded perspective view of FIG. [Figure 7] FIG. 7 is an enlarged perspective view of the joint guide piece of FIG. 6. [Figure 8] FIG. 8 is a side view of FIG. [Figure 9] 5 is a side view focusing on a portion relating to the tension adjusting member in FIG. 4. FIG. [Figure 10] 3 is a perspective view showing the positional relationship between the bag-making and filling chute and the vertical sealing mechanism in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A vertical bag making and filling apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 to 3, this vertical bag making and filling equipment 1 feeds packaging material vertically to produce tea bags in the shape of a triangular pyramid or a flat bag. Both widthwise ends of a vertically continuous strip of packaging material are joined and vertically sealed to form a tube. Before and after filling with ingredients, horizontal seals are applied at intervals across the tubular packaging material and it is cut to produce bags continuously filled with ingredients. An ultrasonic method is used for sealing, and it is assumed that packaging material F (Figure 3) will be made of nonwoven nylon fabric, nonwoven polyethylene fiber fabric, or other material that can be ultrasonically welded.

[0019] As shown in Figures 4 to 6, the chute body 5 of the bag making and filling chute 3 is cylindrical and is installed with its axial direction in the up-down direction. Part of the arc-shaped upper edge 5a of the chute body 5 is cut out in a U-shape, and the edge of the half-split hopper 7 is fitted to this cutout edge and integrated by welding. The upper edge 7a of the hopper 7 is connected to the upper edge 5a without any step. The mounting portion 9 is connected to the upper side of the chute body 5 as its upper end and is integrated by welding. The mounting portion 9 has a half-cylindrical portion 11, and a pair of side portions 13, 13 are integrated from each half edge by welding. The upper edges of the pair of side portions 13, 13 slope downward as they move away from the half-cylindrical portion 11. The lower edge 13a of the side portion 13 is connected without a step to the lower edge 11a of the half-cylindrical portion 11.

[0020] The lower edge 13a of the side portion 13 is connected coaxially to the lower edge 11a of the semi-split cylindrical portion 11, and the lower edge 11a is fitted to the upper edge 5a, and the lower edge 13a is fitted to the upper edge 7a, and they are integrated by welding, so that they are connected axially while being open in the vertical direction. The side portion 13 extends beyond the hopper 7 and protrudes from the hopper 7 by that amount, but the lower edge 13a of the protruding part is closed by the lower surface portion 13b. Therefore, all the raw materials fed into the attached portion 9 are sent to the chute main body 5 side.

[0021] A substantially cylindrical connecting portion 15 is fitted into the concave edges on the rear side of a pair of opposing side portions 13, 13 and is laid across the pair, with both ends of the connecting portion 15 protruding outward from the side portions 13, 13. The connecting portion 15 serves as a rear portion that closes the rear side of the side portion 13. The upper and lower sides of the connecting portion 15 are horizontal planes, and the lower surface abuts against the lower surface portion 13b. The upper surface is lower than the upper edge of the side portion 13. For the sake of convenience in explaining the positional relationship, the half-cylinder portion 11 will be referred to as the front side, and the connecting portion 15 as the rear side.

[0022] A receiving surface portion 17 is overlapped and fixed to the lower surface of the lower surface portion 13b. This receiving surface portion 17 has a portion 17a that protrudes outward from the side surface portion 13, and the lower surface of the protruding portion 15a of the connecting portion 15 faces the upper surface of the protruding portion 17a with a small gap therebetween. The protruding portion 17a extends outward in the left-right direction beyond the protruding portion 15a, and a step is formed between the protruding portion 17a and the protruding portion 15a by that amount. The receiving surface portion 17 is composed of one surface portion bent into an L-shape, and the other surface portion wraps around to the rear side of the connecting portion 15. This other surface portion is used for fixing to the device housing side.

[0023] Hand-held guide pieces 19, 19 are attached to the protruding portions 15a, 15a of the connecting portion 15. As shown in Figures 7 and 8, the hand-held guide piece 19 is formed three-dimensionally by bending a single vertically long rectangular metal plate 21. At the top, an L-shaped notch is provided by cutting from the rear edge (the edge that is on the rear side when attached in FIG. 4), and horizontal edges 21a, 21b and vertical edges 21c, 21d extending upward are formed on both sides of the notch. A bent portion 21e extending laterally is provided near the boundary between horizontal edge 21a and vertical edge 21c, and the panel is bent along this bent portion. The portion continuing to the upper side at the boundary of bent portion 21e is the mounting portion 23, and the portion continuing to the lower side is the guide portion 25.

[0024] The mounting portion 23 has a horizontally long rectangular shape, and the upper side is bent along a bent portion 21f extending in an oblique direction so as to have a peak-valley relationship with the bent portion 21e side. Further, the guide portion 25 is provided with a folded portion 21g extending in the vertical direction at the boundary between the horizontal edge 21a and the vertical edge 21c, and is folded back along this portion to have a U-shaped cross section. This folding forms a pair of inner surfaces that face each other in parallel, which serve as guide surfaces 25a, 25a.

[0025] The palm guide piece 19 is constructed as described above, with the lateral edge 21b of the mounting portion 23 resting on the step on the upper surface of the protruding portion 17a of the receiving surface portion 17 and being attached to the side of the mounting portion 9 in a state where it is overlapped with the end surface of the protruding portion 15a of the connecting portion 15. With this attachment, the guide portion 25 is located forward of the connecting portion 15 . A pair of guide surfaces 25a, 25a of the guide portion 25 bent by the bent portion 21e are inclined in an inverted V shape.

[0026] Further, a gap is secured between the mounting portion 23 located above the pair of guide surfaces 25a, 25a and the outer surface of the mounted portion 9. The upper portion of the mounting portion 23 is bent by a bending portion 21f to widen the gap, and this portion serves as a receiving opening 27 for the packaging material F that is enlarged in a tapered shape. Guide groove 25b has a U-shaped cross section in the direction perpendicular to the packaging material feed direction and is open on three sides including the above-mentioned upper side, and is open on the top and bottom directions, which are in the packaging material feed direction, and on the front side. As a result, when the packaging material F is fed downward while continuing to curve along the arcuate outer surface of the bag-making and filling chute 3, the widthwise edge F1 enters between the guide grooves 25b and is fed smoothly downward while being forced along the inner surface. The pair of folded guide pieces 19, 19 are attached symmetrically on either side of the mounting portion 9, and the respective guide grooves 25b, 25b are arranged in an inverted V-shape that narrows downstream in the packaging material feed direction. Therefore, when the width direction edge F1 enters between the guide grooves 25b and is smoothly fed downward along the inner surface thereof, it is guided in the folded direction and is almost in the folded state when it exits.

[0027] A tension adjusting member 29 is provided on the half-cylinder portion 11 side of the mounting portion 9. As shown in Fig. 6, the tension adjusting member 29 is curved along the outer surface of the half-split cylindrical portion 11, and a mounting portion 33 is provided on the concave curved surface side of a tongue-shaped tensioning surface portion 31 with a convergent lower side. The mounting portion 33 is flat and protrudes radially inward from the concave curved surface. The mounting portion 33 has a portion that extends above the tensioning surface portion 31, and a bolt insertion hole 33a is formed in this extending portion. A top surface portion 11b is placed on the upper end of the half-split cylindrical portion 11, and an insertion groove 11c is formed by cutting out the top surface portion 11b across the half-split cylindrical portion 11. A mounting wall 11d is erected on the top surface portion 11b along the edge of the insertion groove 11c, and a bolt insertion hole 11e is also formed in the mounting wall 11d.

[0028] When the mounting portion 33 is inserted into this insertion groove 11c, as shown in Figure 4, the concave curved surface of the tensioning portion 31 fits snugly against the outer surface of the half-split cylindrical portion 11 with a gap between them, and the bolt insertion hole 33a of the mounting portion 33 communicates with the bolt insertion hole (tapped hole) 11e in the mounting wall 11d, so that the tension adjustment member 29 can be fixed to the mounting portion 9 by screwing in and tightening the bolt. The mounting portion 33 is rotatable around the bolts inserted into the bolt insertion holes 11e, 33a as a pivot point, and as shown in Figure 9, the tension surface portion 31 can be raised or lowered at a desired angle from a state where it is overlapped with the outer surface of the half-split cylindrical portion 11.

[0029] A number of guide rods 35, 35, ... are hung down at equal intervals from the underside of the chute body 5. These guide rods 35, 35, ... prevent the packaging material F, which has been vertically sealed between the chute body 5 and has become completely cylindrical, from overlapping when it leaves the chute body 5.

[0030] As described above, the pair of joint guide pieces 19, 19 and the tension adjustment member 29 are attached to the bag-making and filling chute 3, and as shown in Figure 3, when the packaging material F sent from above under tension is sent downward while being made to fit along the bag-making and filling chute 3, the edges F1 on both sides in the width direction are made to fit along the guide grooves 25b, 25b and move while being guided in the joint direction, so that curving begins from the upper side of the packaging material F that is not fitted and is in a free state. When the packaging material F has reached the stage where it is made to fit along the arcuate outer surface of the half-shaped cylindrical portion 11, it is being formed into a cylindrical shape.

[0031] If the packaging material F meanders, the edges of the packaging material F will hit the bottoms of the guide grooves 25b unevenly, and the sides that hit harder will be pushed back, thereby preventing the packaging material from meandering when passing through the guide grooves 25b. When the packaging material F slackens, it is prone to meandering, but when the tension surface portion 31 of the tension adjusting member 29 is raised and lowered, the packaging material F is made to conform to the outer surface of the raised and lowered tension surface portion 31, so that the curved surface of the packaging material F bulges outward to create tension. Furthermore, there are some unevenness due to welding marks at the boundary between the lower edge 11a of the half-split cylindrical portion 11 and the upper edge 5a of the chute body 5, and this unevenness can cause the packaging material F to get caught and meander as it is fed along it. However, as the packaging material F is fed along the outer surface of the undulating stretched surface portion 31, the packaging material F around the stretched surface portion 31 rises up from the bag-making and filling chute 3 and avoids the above-mentioned welding marks at a distance, so meandering is more effectively suppressed.

[0032] Although the hand-held guide pieces 19, 19, etc. are integrated into the bag-making and filling chute 3, the overall shape is simple, so that it can be constructed by simple assembly of machined parts without requiring the skills of a skilled craftsman. In addition, the areas where the packaging material F is laid are surface treated to facilitate smooth feeding, but since the overall size is reduced, the area for this surface treatment is also reduced. This also contributes to cost reduction.

[0033] 1 and 2, the lower end of the raw material input hopper 37 fits into the upper opening of the mounting portion 9 of the bag-making and filling chute 3. Since the space above the upper opening of the mounting portion 9 is open, the raw material input hopper 37 can fit into the bag-making and filling chute 3 in an almost upright position. Since the raw materials falling inside the raw material charging hopper 37 can fall quickly if they can fall straight, if the raw material charging hopper 37 is in the above-mentioned upright position, the total cycle time can be shortened. In addition, the overall length of the bag making and filling chute 3 is shorter by the absence of the bag former, and space is created above the mounting portion 9, which can be used for mounting other components, etc.

[0034] The vertical form-fill-seal apparatus 1 will be described in its entirety, including the raw material input hopper 37 and the form-fill-seal chute 3, from the upstream side to the downstream side in the feeding direction of the packaging material F. First, the packaging material F wound in a roll shape is pulled out from the packaging material reel 39. A rotating shaft of a pull-out motor 41 is connected to a reel shaft 39a of the packaging material reel 39, and the reel shaft 39a rotates by receiving a rotational force of the pull-out motor 41, and the packaging material F is pulled out. The contact rod 43 is L-shaped, and its base 43a is rotatably connected to a bracket protruding from the packaging material reel 39 side, so that its tip 43b comes into contact with the outer circumferential surface of the packaging material F. As the packaging material F is pulled out, the roll diameter becomes smaller, but the contact rod 43 rotates due to its own weight, changing the contact angle of its tip 43b, so that the contact state is always maintained.

[0035] An angle sensor 45 is provided to detect the contact angle of the contact rod 43, and the pull-out motor 41 is driven and controlled using the contact angle from this angle sensor 45 as an index to keep the feed amount constant. Reference numeral 46 denotes a dancer lever mechanism, and this dancer lever 46a is pivotally supported so as to be freely swingable on a swing shaft 46b fixed to a mounting stand of the packaging material reel 39. A dancer roll 46c is freely provided protruding from the tip side of this dancer lever 46a. Reference numeral 47 denotes a guide roll, and this guide roll 47 is disposed above the bag-making and filling chute 3 in a free state. The packaging material reel 39, the dancer roll 46c, and the guide roll 47 are arranged so that their axial directions are in parallel relationship.

[0036] A vertical sealing mechanism 49 is disposed below the pair of joint guide pieces 19, 19 in the bag making and filling chute 3. As shown in Fig. 10, a pair of metal feed rolls 51, 51 at the top and a pair of urethane feed rolls 53, 53 at the bottom are lined up in the vertical direction, with the top feed rolls 51, 51 being free and the bottom feed rolls 53, 53 being rotated by the drive of a feed motor (not shown). Since there is no bag making former, the feed resistance of the packaging material F is smaller, and it is possible to set the top feed rolls 51, 51 in a free state. Since the upper feed rolls 51, 51 are not connected to the feed motor, the number of parts is reduced accordingly.

[0037] The sheet is passed between an ultrasonic horn 57 and a receiving roll 59, which are arranged between an upper pair of feed rolls 51, 51 and a lower pair of feed rolls 53, 53, and is vertically sealed and formed into a cylindrical shape. A horizontal sealing mechanism 61 is arranged below the vertical sealing mechanism 49, and horizontal seals are applied and cut at intervals using the same sealing method as the vertical seals. Raw material is dropped from the raw material input hopper 37 between the horizontal seals, so that bags filled with raw material are continuously produced.

[0038] As shown in FIG. 3, the packaging material F is pulled out from the packaging reel 39, guided by the dancer roll 46c and the guide roll 47, and fed from above to the bag-making and filling chute 3, and then, as described above, is sent via the vertical sealing mechanism 49 to the horizontal sealing mechanism 61. When the feed motor of the vertical sealing mechanism 49 is driven to feed the packaging material F, the packaging material F is pulled by the amount of the feed, causing the dancer lever 46a to swing and lift its leading edge. When the leading edge lifts, the draw-out motor 41 is driven to draw out the packaging material F from the packaging material reel 39 by the amount of the feed, causing the dancer lever 46a to swing in the opposite direction to the above, causing the leading edge to lower. In this way, the dancer lever 46a swings back and forth as shown by the arrows, thereby maintaining the tension of the packaging material F.

[0039] As described above, the upper side of the vertical sealing mechanism 49 is a free roll, and further, the pull-out motor 41 is attached to the packaging material reel 39 side, and the feed direction of the packaging material F is changed in only two stages, by the dancer roll 46c and the guide roll 47, resulting in a simple configuration. The tubular forming of the packaging material F and the folding of the edge portion F1 can be achieved by a pair of folding guide pieces 19, 19. Furthermore, once meandering occurs, as the packaging material F is forced to conform to the large surface of the bag former, it will spread widely. However, with this vertical bag making and filling apparatus 1, since there is no bag former, there is no need for highly precise positioning adjustments over multiple stages in the previous stage. Even if the position shifts slightly due to fluctuations in the feed amount or tension in the previous stage, a distance is secured that allows the packaging material F to move relatively freely in the horizontal direction without being forced to conform to anything from the guide rolls 47 to the bag making and filling chute 3, and the upper side of the vertical sealing mechanism 49 is a free roll, which also works to advantage, so that meandering is effectively suppressed simply by guiding the packaging material F to the pair of folding guide pieces 19, 19 and the tension adjustment member 29. In this way, by improving the configuration of the bag-making and filling chute 3, the overall configuration of the device can be simplified, and costs can be reduced.

[0040] Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and the invention also includes design changes within the scope of the present invention that do not deviate from the gist of the present invention. [Explanation of symbols]

[0041] 1... Vertical bag making and filling device 3... Bag making and filling chute 5... Chute body 5a...Upper edge 7...Half-split hopper 7a...Upper edge 9...Attachment portion 11: Semi-split cylindrical portion; 11a: Lower end edge; 11b: Top surface portion; 11c: Insertion groove 11d: Mounting wall; 11e: Bolt insertion hole; 13: Side portion; 13a: Lower edge 13b...Lower surface part 15...Connecting part 15a...Protruding part 17...Receiving surface part 17a: protruding portion 19: hand guide piece 21: metal plate 21a, 21b: side edges 21c, 21d... Vertical edge 21e... Folded portion 21f... Folded portion 21g... Folded portion 23: Mounting portion 25: Guide portion 25a: Guide surface 25b: Guide groove 27: Receiving port 29: Tension adjustment member 31: Tension surface portion 33: Mounting portion 33a...Bolt insertion hole 35...Guide rod 37...Material input hopper 39: Packaging material reel 39a: Reel shaft 41: Pull-out motor 43: contact rod 43a: base 43b: tip 45: angle sensor 46...Dancer lever mechanism 46a...Dancer lever 46b...Oscillating shaft 46c...Dancer roll 47...Guide roll 49... Vertical seal mechanism 51... Feed roll 53... Feed roll 57... Ultrasonic horn 59... receiving roll 61... horizontal seal mechanism F…Wrapping material F1…Edge

Claims

1. In a vertical form-fill-seal device, when a continuous strip-shaped packaging material is pulled out from a packaging material reel and sent downward while being tensioned and made to flow along the arcuate outer surface of a bag-making and filling chute, both widthwise edges of the packaging material are joined together and formed into a cylindrical shape by a vertical sealing mechanism, a pair of seam guide pieces for guiding the edges of the packaging material on both sides in the width direction in a seam direction on the sides of the upper end of the bag making and filling chute; The pair of joint guide pieces are arranged such that the guide surfaces are arranged in an inverted V-shape narrowing toward the downstream side in the packaging material feed direction, and each joint guide piece has a U-shaped cross section in a direction perpendicular to the packaging material feed direction, and is provided with a guide groove that is open on the arc outer surface side and on both sides in the packaging material feed direction, Further, a tension adjusting member is provided on the opposite side of the pair of joint guide pieces across the bag making and filling chute, The tension adjusting member has a tension surface portion, and the tension adjusting member has a height adjustable angle from the bag making and filling chute. a bag making and filling chute having a raised taut surface portion, the packaging material is guided in the folding direction along the curved outer surface of the bag making and filling chute, and the packaging material is sent downward between a pair of guide surfaces that define the guide groove, with the edges of the packaging material on both sides in the width direction being guided along the curved outer surface, so that the packaging material is gradually shaped into a tube.When one side of the edges of the packaging material on both sides in the width direction hits the bottom of the groove of the folding guide piece, the one side is pushed back to the other side of the edges of the packaging material on both sides in the width direction, thereby preventing the edges of the packaging material from meandering.

2. In the vertical bag making and filling apparatus according to claim 1, A vertical bag making and filling device characterized in that the packaging material receiving side, which corresponds to the upstream side of the guide groove of the joining guide piece in the packaging material feeding direction, is expanded in a tapered shape.

3. In the vertical bag making and filling apparatus according to claim 1 or 2, A vertical bag making and filling apparatus, characterized in that the tension surface portion of the tension adjusting member is formed in a tongue-like plate shape that converges toward the downstream side in the packaging material feed direction.

4. In the vertical bag making and filling apparatus according to any one of claims 1 to 3, A vertical bag making and filling apparatus characterized in that the upper end of the bag making and filling chute is formed as a separate body from the rest of the bag making and filling chute as an attachment portion for a pair of gable guide pieces and a tension adjustment member, and is joined to the remaining bag making and filling chute so as to be axially connected and integrated.

5. In the vertical bag making and filling apparatus according to any one of claims 1 to 4, A vertical bag making and filling apparatus characterized in that the lower end of a raw material input hopper is inserted in an upper opening at the upper end of the bag making and filling chute in an almost upright position.

6. In the vertical bag making and filling apparatus according to any one of claims 1 to 5, The vertical sealing mechanism is a vertical bag making and filling device characterized in that a pair of feed rolls are arranged above and below, with a vertical sealing means disposed between them, the upper pair of feed rolls being free rolls and the lower pair of feed rolls being drive rolls.

7. 7. The vertical bag making and filling apparatus according to claim 6, A vertical bag making and filling device comprising a packaging reel composed of a drive roll, a dancer roll which moves back and forth in the vertical direction, and a free guide roll arranged above a bag making and filling chute, wherein the tension of the packaging material is maintained by the dancer roll moving up and down in response to changes in the length of the packaging material in the feed direction between the packaging material reel and the guide roll caused by drive including alternative or partial overlapping of the drive roll on the vertical sealing mechanism side and the drive roll on the packaging reel side.

8. In the vertical bag making and filling apparatus according to claim 7, A vertical bag making and filling device characterized by comprising a contact rod that contacts the outer peripheral surface of a packaging roll wound around a packaging reel, and a motor adjustment means that controls the motor drive using the contact angle of the contact rod as an index to keep the amount of packaging material pulled out constant.

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