JP7116974B2 - Paper splicing method and device for packaging machine - Google Patents

Description

The present invention provides a packaging machine, particularly a vertical form-fill-seal packaging machine, in which, for example, when a band-shaped packaging material fed out from a packaging material roll is used up, the end of the band-shaped packaging material and the band-shaped packaging material fed out from a new packaging material roll are used. The present invention relates to a paper splicing method and apparatus for splicing the starting end of a packaging material.

Conventionally, as a packaging machine, particularly a bag-making, filling-and-sealing machine, a vertical bag-making, filling-and-sealing machine 50, an example of which is shown in a schematic perspective view in FIG. 8, has been widely used. In the vertical bag-making and filling machine 50, the band-shaped packaging material Fw is wound around a paper tube to form a packaging material roll Fr. 60 is rotatably mounted. The strip-shaped packaging material Fw is delivered from the packaging material roll Fr by an appropriate delivery device and supplied to the former 51 according to the packaging operation of the packaging machine 50 . The belt-shaped packaging material Fw sent to the former 51 is bent into a substantially cylindrical shape so that both side edge portions fe, fe are overlapped in a palm-to-palm shape, and after passing through the former 51, it is transported in the vertical direction (packaging material feeding direction). 2, vertical seals (vertical seals Sc) are applied to both side edge portions fe, fe by the vertical sealing device 52 to form the cylindrical packaging material Ft. The vertical sealing device 52 has a pair of vertical heat sealing bars 52a, 52b that pressurize and heat by sandwiching both side edge portions fe, fe. Products S, which are packages, are put into the tubular packaging material Ft through a hopper and a filling cylinder (filling cylinder) 53 . The horizontal sealing/cutting device 54 applies horizontal sealing Se to the tubular packaging material Ft in the horizontal direction (the direction crossing the feeding direction of the packaging material), thereby forming a bag in which the product S is packaged. At the same time when the package Bp is manufactured, a bag B into which the product S is put next is formed. On both left and right sides of the outer periphery of the filling cylinder 53, packaging material feeders 55, 55 each comprising a suction belt for sandwiching and feeding the tubular packaging material Ft are arranged.

The horizontal seal cut blocks 54a and 54b that constitute the horizontal seal/cut device 54 are members that move toward and away from the tubular packaging material Ft, respectively, and move in a direction that crosses the tubular packaging material Ft when approaching. , to form a bottom-side lateral seal Se for the bag B and a top-side lateral seal Se for the bag package Bp. The horizontal sealing/cutting device 54 also includes a cutter blade 56 that cuts through the tubular packaging material Ft. When both horizontal seal cut blocks 54a and 54b approach each other, the upper and lower horizontal seal portions sandwich the packaging material to weld the cylindrical packaging material Ft to form a horizontal seal Se, and at the same time, one seal cut block 54a is closed. The attached cutter blade 56 breaks through and cuts the cylindrical packaging material Ft, and enters the groove 57 formed in the other seal cut block 54b. A printing device 61 is arranged in the middle of supplying the belt-shaped packaging material Fw, and performs required printing such as a date on the surface of the belt-shaped packaging material Fw. The strip-shaped packaging material Fw is stored and tensioned to a required length by dancer rollers 62, and is guided to a running crossroads by guide rollers 63 at several points.

In such a vertical form-fill-seal packaging machine 50, for example, when the supply of the belt-shaped packaging material Fw from the packaging material roll Fr is completed, a new packaging material roll is loaded in the roll holder 60, and the old packaging material roll is loaded. It is necessary to splice the end of the material and the beginning of the new packaging strip. A worker goes around the rear of the packaging machine 50 and stands in the vicinity of the roll holder 60 to perform the paper splicing work. Therefore, when the operator sees the band-shaped packaging material Fw extending on the path from the packaging material roll Fr to the former 51, the worker sees the back side thereof. Also, in splicing the packaging materials, the splicing plate is placed on the back side of the belt-shaped packaging material Fw. I have to connect the paper while doing it. If it is a packaging material such as a transparent film, it may be possible to see through the printed surface with a light, but it is not possible to see the surface of the packaging material such as an aluminum deposition film.

When the end and start ends of the strip-shaped packaging material are spliced without deviation, the paper feeding of the new and old strip-shaped packaging materials can be continued while the pitch is accurately maintained. For safety, only 1 to 3 empty bags produced from the connecting portion can be ejected from the connected belt-shaped packaging material, so that the bag-making, filling, packaging, and packaging can be continuously performed without causing pitch defects. However, if the old and new belt-shaped packaging materials are not spliced accurately, for example, printing on the belt-shaped packaging material by a printing device arranged in the middle of feeding the belt-shaped packaging material will also be out of alignment. Not only the empty bag with the connecting part, but also several bags downstream are lost.

The applicant of the present invention has developed a vertical bag-making/filling device that detects the terminal end of a band-shaped packaging material in the direction of rotation of a guide roller and makes it possible to carry out the paper splicing work performed by matching patterns on the surfaces of the packaging paper on the surface side of the packaging paper. A method and device for splicing paper in a packaging machine are provided (Patent Document 1). According to this paper splicing, when the end of delivery of the packaging material is detected, the packaging machine is stopped by the control device, and the belt-shaped packaging material is stopped by the rubber roll with a one-way stopper provided in the supply of the packaging material. be held down. The one-way stopper-containing rubber roll does not rotate in the transport direction of the packaging material, but can rotate only in the counter transport direction. A new packaging material roll is set in the take-up holder, the belt-shaped packaging material fixed by the rubber roll with a one-way stopper is pulled out onto the roll surface of the new packaging material roll, and the surfaces of the old and new packaging materials are placed on the new packaging material roll. Patterns are matched and paper splicing is performed. In this paper splicing, the traveling route of the belt-shaped packaging material is simple, the packaging material does not meander, and an expensive displacement sensor for accurately measuring the distance is not required, resulting in good work efficiency.

As another paper splicing method, the running path of the belt-shaped packaging material is turned 45 degrees by a guide roller so that the front side of the old packaging material is turned up, and the end of the old belt-shaped packaging material is connected to the new belt-shaped packaging material. It has also been proposed to perform paper splicing at the start end and the front side of the paper (Patent Document 2).

FIG. 9 shows an example of a paper splicing device as a perspective view. The splicing device 70 is fixedly installed behind or above the packaging material roll Fr loaded into the roll holder 60 of the form-fill-seal machine 50 (FIG. 8). The splicing of the strip-shaped packaging material Fw is such that the end Fwe of the old strip-shaped packaging material Fw1 and the starting end Fws of the new strip-shaped packaging material Fw2 are pulled out onto the splicing device 70 and have a width W that is wider than the lateral width w of the strip-shaped packaging material Fw. This is done while being placed on the adsorption plate 71 and adsorbed by the adsorption means.

The suction plate 71 is formed with a slit 72 extending in the transverse direction of the band-shaped packaging material Fw through which the cutter can pass, and suction hole rows 73, 73 as suction means extending along the slit 72 on both sides of the slit 72. It is By moving the cutting edge of the cutter along the slit 72 while the strip packaging material Fw is held by suction, the strip packaging material Fw is separated from the old packaging strip Fw1 already supplied from the packaging machine and the packaging material roll. It is cut into the wrapping material that remains attached to the Fr paper tube. Each suction hole row 63 is, for example, a row of a plurality of suction holes 74 that suck and hold the web-like packaging material Fw by means of negative pressure generated by an ejector that blows out air. Further, guide rollers 75 and 76 for guiding the movement of the band-shaped packaging material Fw are attached to the suction plate 71 in the immediate vicinity of the upstream side and the downstream side thereof. The guide rollers 75 and 76 are set so that the top surfaces of the rollers are flush with or slightly higher than the surface of the attraction plate 71 .

On the suction plate 71, the leading edge Fws of the new packaging material Fw2 pulled out from the packaging material roll newly loaded in the roll holder 60 is aligned with the terminal end Fwe of the old packaging material Fw1 on the side of the packaging machine. The new packaging strip Fw2 is spliced to the old packaging strip Fw1 on the side of the packaging machine by joining with a tape T or the like. Since the splicing device 70 is not used except for the splicing work, it is rather an obstacle to checking the operating state when the bag making, filling and packaging machine is in operation. If the paper splicing device 70 is to be removed after use, it must be attached when it is used, and the attachment and detachment work is troublesome.

JP 2012-240756 A JP-A-2000-245014

Therefore, in the packaging machine, for example, when the consumption of the band-shaped packaging material fed out from the packaging material roll for packaging the product is exhausted, the end of the old band-shaped packaging material and the new packaging material roll loaded in the roll holder are separated from each other. In the splicing for splicing the starting end of the new belt-shaped packaging material to be pulled out, the splicing is performed with the surface of both the new and old belt-shaped packaging materials facing up on a splicing plate placed at a working position where the splicing work is easy. There is a problem to be solved in terms of making it possible.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to splicing both old and new belt-shaped packaging materials with the surface facing up on a splicing plate placed in a working position where the splicing work is facilitated. To provide a paper splicing method and device for a packaging machine that enables reliable and accurate paper splicing while matching patterns such as printing appearing on the front side of a strip packaging material.

In order to solve the above-mentioned problems, the splicing method for a packaging machine according to the present invention is to place a splicing plate at a position above or behind a packaging material roll loaded in a roll holder and at a position where the splicing is to be performed. The trailing end of the strip-shaped packaging material is placed on the working surface of the spliced board from below the spliced board with the front surface facing up, and the leading end of the new strip-shaped packaging material pulled out from the new packaging material roll is placed on the spliced board. placing it on the working surface of the splicing plate from above with the front side facing up, and splicing the end of the old wrapping strip and the beginning of the new wrapping strip on the working surface of the splicing plate; consists of

According to the paper splicing method in this packaging machine, the end of the old strip-shaped packaging material is placed on the work surface of the paper splicing plate from below the splicing plate with the front surface facing up, and is pulled out from the new packaging material roll. The leading end of the new strip-shaped packaging material is placed on the working surface of the splicing plate with the front side up from above the splicing plate. The end of the old packaging strip and the beginning of the new packaging strip are placed on the splicing board with the printed surface facing up, making it easier to match the patterns. After the overlapped portion is cut with a cutter, the paper is spliced by means of tape or the like.

In this paper splicing method in a packaging machine, when the belt-shaped packaging material is pulled out from the packaging material roll, a point at which the belt-shaped packaging material separates from the packaging material roll is a zenith position of the packaging material roll or its vicinity, and the belt-shaped packaging material is pulled out from the packaging material roll, the strip-shaped packaging material pulled out from the separation point of the packaging material roll moves properly from above to below the splicing plate as it is. It can be said that it follows the direction.
By determining the pull-out point and direction of the belt-shaped packaging material from the packaging material roll as described above, the belt-shaped packaging material can be smoothly pulled out onto the splicing board with its surface side up.

In this splicing method for a packaging machine, the splicing plate is movable between the work position where the splicing work is performed and a retracted position below the packaging material roll, and the splicing plate is adapted to When the retracted position is occupied, the splicing plate is positioned between guide rollers disposed upstream and downstream of the feeding of the strip packaging material, and the splicing plate moves from the retracted position to the working position alone or The band-shaped packaging material moved together with the guide roller and spliced is guided by the guide roller without interfering with the splicing plate occupying the retracted position . The splicing plate occupies a retracted position below the packaging material roll during the packaging operation of the packaging machine, and is positioned above or behind the packaging material roll from the retracted position during splicing. It is moved to the position and exhibits the original function of paper splicing . When the splicing plate occupies the retracted position, the splicing plate is positioned between the guide rollers disposed upstream and downstream of the feeding of the strip packaging material. The material is guided by guide rollers, and the splicing plate does not interfere with the running of the belt-shaped packaging material. When the splicing plate is moved into the working position, it is moved either alone or together with the guide rollers. When the paper splicing plate is moved alone, the moving weight can be reduced because the guide roller is not moved. When the splicing plate is moved together with the guide roller, the guide roller can be used to guide the band-shaped packaging material to the splicing plate at the working position during splicing to improve the workability, and at the retracted position. Since the guide rollers do not remain at the working position during movement, they do not interfere with the unwinding of the belt-shaped packaging material from the packaging material roll.

In order to solve the above-mentioned problems, the splicing device in the packaging machine according to the present invention can be positioned above or behind the packaging material roll loaded in the roll holder for splicing the strip packaging material. and guide rollers arranged below the roll of packaging material for guiding the strip of packaging material to the packaging machine, with which the paper is drawn from a new roll of packaging material and The starting end of the new strip-shaped packaging material sent from above the splicing plate with the front surface facing up and the end of the old strip-shaped packaging material sent from below the splicing plate with the front surface facing up are aligned with the splicing plate. It consists of being placed on a work surface and spliced.

According to the splicing device in this form-fill-sealing machine, when the splicing plate occupies a position above or behind the packaging material roll loaded in the roll holder, the old belt-like shape is formed on the working surface of the splicing plate. The end of the packaging material and the beginning of the new packaging strip can be spliced together. The end of the old packaging strip can be pulled back onto the splicing plate from below the splicing plate through below the packaging material roll, and the beginning of the new packaging strip can be pulled back onto the splicing plate from above the splicing plate. can be pulled out. On the working surface of the splicing board, the printed surface of the old wrapping material and the beginning of the new wrapping material are placed facing upward, thereby aligning the patterns of the new and old wrapping materials. Paper splicing is possible. Therefore, it becomes easy to splice the old and new belt-shaped packaging materials without pattern deviation, and waste of a large amount of packaging materials can be prevented. In addition, the spliced band-shaped packaging material can be guided to the traveling path to the packaging machine with a space-saving and simple structure by the guide rollers arranged below the packaging material roll.

In this paper splicing device in the packaging machine, when the strip-shaped packaging material is pulled out from the packaging material roll, a separation point at which the strip-shaped packaging material separates from the packaging material roll is at or near the zenith position of the packaging material roll, and the strip-shaped packaging material is pulled out from the packaging material roll, the strip-shaped packaging material pulled out from the separation point of the packaging material roll moves properly from above to below the splicing plate as it is. It can be said that it follows the direction.
By determining the pull-out point and direction of the belt-shaped packaging material from the packaging material roll as described above, the belt-shaped packaging material can be smoothly pulled out onto the splicing board with its surface side up.

In the splicing device in this packaging machine, the splicing plate is movable between the work position where the splicing is performed and a retracted position below the packaging material roll, and at the retracted position, The splicing plate is positioned between the guide rollers disposed on the upstream side and the downstream side of the feeding of the strip packaging material, and the guide rollers allow the spliced strip packaging material to travel as described above. The paper splicing plate can be guided without interfering with the paper splicing plate, and the paper splicing plate can be moved from the retracted position to the working position alone or together with the guide roller .
With regard to the paper splicing plate, due to the simple structure of moving the paper splicing plate, it is moved from the retracted position to the working position above or behind the packaging material roll only when it is necessary for paper splicing, and the new and old pulled out The ends of the belt-like packaging material can be moved onto the splicing plate so that the printed surface faces the front side, and are retracted to a position below the packaging material roll during other packaging operations of the packaging machine. Since the splicing plate occupying the retracted position is located between the guide rollers disposed upstream and downstream of the feeding of the strip packaging material, the packaging strip is not moved during the packaging operation of the packaging machine. Guided by guide rollers below the packaging material roll, the splicing plate does not interfere with the running of the strip packaging material. When the splicing plate is moved to the working position, it is moved alone or together with the guide rollers to perform its original splicing function . When the paper splicing plate is moved alone, the moving weight can be reduced because the guide roller is not moved. When the splicing plate is moved together with the guide roller, the guide roller can be used to guide the band-shaped packaging material to the splicing plate at the working position during splicing to improve the workability, and at the retracted position. When moving, the guide roller moves to the retracted position below the packaging material roll together with the splicing plate and does not remain at the working position, so that it does not interfere with the delivery of the belt-shaped packaging material from the packaging material roll. At the retracted position, the guide roller can be utilized as a roller that guides the running of the band-shaped packaging material spliced under the packaging material roll toward the packaging machine. Therefore, it is possible to improve the functionality of the guide roller and contribute to the simplification of the structure.

In the paper splicing device in this packaging machine, a rocking plate supporting the paper splicing plate and swingably provided on a machine frame for moving the paper splicing plate, and a rocking plate freely relative to the rocking plate. and an operating rod that is slidably connected via a joint and is connected to the machine frame by a universal joint so that it can be raised and lowered, and the paper splicing plate is adapted to move up and down according to the raising and lowering of the operating rod. The work position can be occupied by swinging the swing plate to a predetermined position.
The rocking plate can be easily rocked by a combined operation of sliding and rocking the operating rod, and in the case of the paper splicing plate alone, the paper splicing plate, or in the case of the paper splicing plate equipped with guide rollers. can move the splicing plate together with the guide roller between the retracted position and the working position with a simple structure and operation.

In the splicing device of the packaging machine, the splicing plate is pivotably supported and positioned at a lower position of the packaging material roll and a rearward position of the packaging material roll with respect to the machine frame to move the splicing plate. and the paper splicing plate swings backward with respect to the slide body when the slide body is slid to the rear position of the packaging material roll. By moving it can occupy said working position. The slide body is slidably provided with respect to the machine frame between a position below the packaging material roll and a position behind the packaging material roll. The splicing plate occupies a retracted position when it is in a non-swinging state rearward with respect to the slide body positioned below the packaging material roll, and is swung backward with respect to the slide body positioned behind the packaging material roll. occupy a working position when By combining the sliding and swinging motions, the splicing plate can be moved between the retracted position and the working position with a simple structure and operation.

In the splicing device of this packaging machine, a tensioning device is provided that applies tension to the belt-shaped packaging material fed out from the packaging material roll by its own weight or an urging force. switchable between a tension applying mode in which tension is applied to the strip-shaped packaging material during the wrapping operation and a tension release mode in which the tension on the strip-shaped packaging material is released at least during the splicing. can do.
During splicing, if the tensioning device provided downstream of the retracted position remains in the tensioning mode, when the old wrapping strip is cut by the cutter, the end of the old packaging material will be pulled by the tension of the tensioning device. It may be carried downstream and interfere with the splicing work on the splicing plate. By switching the tension applying device to the tension release mode during splicing, the end of the old belt-shaped packaging material cut by the cutter stays on the splicing plate, preventing interference with the splicing work. .

In the paper splicing device in this packaging machine, the packaging machine forms a bag from the belt-shaped packaging material fed out from the packaging material roll and continuously manufactures bag packages in which products are placed in the bag. It can be a form-fill-seal machine. The paper splicing device can quickly perform paper splicing in a form-fill-seal machine capable of high-speed packaging.

Since the method and apparatus for splicing paper in the form-fill-sealing machine according to the present invention are configured as described above, for example, the end of the old strip-shaped packaging material that has been consumed and the supply of the strip-shaped packaging material has been finished can be spliced. The board can be placed on the working surface of the spliced board from below with the front side up, and the beginning of the new strip packaging material pulled out from the new packaging material roll can be placed from above the spliced board with the front side up. can be placed on the work surface of the splicing board. The end of the old wrapping material and the beginning of the new wrapping material are placed on the paper splicing plate with the printed surface side facing up, making it easier to match the patterns. Misalignment can be prevented, and a large amount of packaging materials and the like can be prevented from being wasted as defective bags or defective bag packages.
The splicing plate occupies a retracted position below the packaging material roll during the packaging operation of the packaging machine, and is positioned above or behind the packaging material roll from the retracted position during splicing. It is moved to a certain working position and performs its original splicing function. When the splicing plate occupies the retracted position, the splicing plate is positioned between the guide rollers arranged upstream and downstream of the feeding of the strip packaging material. is guided by guide rollers, and the splicing plate does not interfere with the running of the belt-like packaging material. When the splicing plate is moved into the working position, it is moved either alone or together with the guide rollers. When the paper splicing plate is moved alone, the moving weight can be reduced because the guide roller is not moved. When the splicing plate is moved together with the guide roller, the guide roller can be used to guide the band-shaped packaging material to the splicing plate at the working position during splicing to improve the workability, and at the retracted position. Since the guide rollers do not remain at the working position during movement, they do not interfere with the unwinding of the belt-shaped packaging material from the packaging material roll.

FIG. 1 is a side view schematically showing an embodiment of a packaging machine to which a paper splicing device according to the present invention is applied. 2 is a perspective view of the paper splicing device shown in FIG. 1. FIG. FIG. 3 is a diagram showing a state in which the splicer shown in FIG. 1 is in a working position. FIG. 4 is a diagram showing a state in which the paper splicing device shown in FIG. 1 is at a retracted position. FIG. 5 is a diagram showing another embodiment of the splicer according to the invention. FIG. 6 is a diagram showing an example of a tension applying device applied to the paper splicing device according to the present invention. FIG. 7 is a diagram showing still another embodiment of the splicing device according to the invention. FIG. 8 is a perspective view showing an example of a conventional vertical form-fill-seal machine. FIG. 9 is a perspective view showing an example of a paper splicing plate used in the paper splicing device.

An embodiment of the method and apparatus for splicing paper in a packaging machine according to the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a schematic side view showing an outline of an embodiment of a packaging machine to which a paper splicing device according to the present invention is applied. 2 is a perspective view of the paper splicing device shown in FIG. 1, and FIGS. 3 and 4 are diagrams for explaining the operation of the paper splicing device shown in FIG.

The splicing device shown in FIG. 1 is applied to a vertical form-fill-seal packaging machine. The vertical form-fill-seal packaging machine itself may be equivalent to the conventional vertical form-fill-seal packaging machine shown in FIG. Therefore, with respect to the vertical form-fill-seal packaging machine, the same reference numerals as those used in FIG. 8 are given to the constituent elements having the same functions, and the explanation thereof will be omitted.

Referring to FIG. 1, in a packaging machine such as a vertical form-fill-sealing machine 50, in which a belt-shaped packaging material Fw is bent into a substantially cylindrical shape by a former 51, the belt-shaped packaging material Fw is applied to the former. The back surface of the belt-shaped packaging material Fw is turned to the front side, and the former 51 bends the belt-shaped packaging material Fw into a substantially cylindrical shape with the back surface of the belt-shaped packaging material Fw as the cylinder inner surface and the front surface of the belt-shaped packaging material Fw as the cylinder outer side, and then forms the tubular packaging material Ft. ing. Therefore, the belt-shaped packaging material Fw unwound or pulled out from the packaging material roll Fr wound with the surface of the belt-shaped packaging material Fw facing outward is sent to the former 51 with the back surface facing the front side. The manner in which the packaging material roll Fr is loaded into the roll holder 60 and the rotation direction Dr of the packaging material roll Fr when it is delivered or pulled out are normally determined naturally as shown in the drawing.

If the supply path of the belt-shaped packaging material Fw is not complicated and the space is not limited, restrictions required for splicing the belt-shaped packaging material Fw can be relaxed. However, at the actual installation site of the vertical form-fill-seal packaging machine 50, it is necessary to consider the packaging material roll Fr, the printing device 61, the dancer roller 62, and other ancillary equipment. is limited, so it is required that some guide rollers 63, 63, . . .

In the vertical form-fill-seal packaging machine 50, when splicing the fed or drawn-out belt-shaped packaging material Fw, due to restrictions on the loading mode and rotation direction of the packaging material roll Fr, generally the belt-shaped packaging material Through the back side facing the front side of Fw, it is forced to match the pattern with the printing applied to the front side. Therefore, if the patterns are not matched correctly when the paper is spliced, and a deviation occurs, there is a possibility that some of the bag packages Bp will become defective products after that. In FIG. 1, of the packaging material rolls Fr loaded in the roll holder 60, the one indicated by the dashed line is a new packaging material roll having the maximum diameter, and the one indicated by the solid line is the one being consumed by the operation of the packaging machine. . The splicing device 1 when splicing the old and new band-shaped packaging materials Fw is indicated by a broken line, and the splicing device 1 occupying the retracted position when the packaging machine is in operation is indicated by a solid line.

In the splicing device 1, the splicing plate and the guide rollers attached along the upstream and downstream sides thereof may have the same structure as the splicing device 70 shown in FIG. Therefore, the splicing plate may have the same structure as the suction plate shown in FIG. omitted. The paper splicing device 1, including the splicing plate 4, at the work position Pw for splicing the papers is positioned behind the packaging material roll Fr (in the opposite direction to the front where the packaging machine 50 exists), which is the working position of the operator. ) above or behind the packaging material roll Fr, the work surface faces rearward and obliquely upward, and is easily visible, and the end Fwe of the old packaging material Fw1 and the beginning of the new packaging material Fw2 The position and posture are determined to facilitate the paper splicing work to connect the Fws. When the splicer 1 occupies the retracted position Pr below the packaging material roll Fr, the splicing plate 4 is located between the guide rollers 75 and 76 and does not interfere with the running of the packaging strip Fw.

2 is a perspective view of the paper splicer, FIG. 2(a) shows the working position taken by the paper splicer during the paper splicing operation, and FIG. 2(b) shows the paper splicer occupying the retracted position. state. The paper splicer 1 is installed behind the vertical form-fill-seal packaging machine together with the packaging material roll Fr loaded in the roll holder 60 . The roll holder 60 is rotatably supported by one side wall 65a extending from the frame of the vertical form-fill-seal packaging machine, and is driven by an appropriate drive motor (servo motor; not shown). The direction of rotation of the roll holder 60 and the packaging material roll Fr is indicated by Dr, and this direction is the same as the direction of rotation of the packaging material roll Fr shown in FIG.

The paper splicer 1 includes a swing plate 3 attached to one side wall 65a so as to swing around a swing shaft 2 (see FIGS. 3 and 4), and a swing plate 3 attached to one side of the swing plate 3. a splicing plate 4 attached to and extending parallel to the roll holder 60, a support plate 5 attached to the other side wall 65b (see FIGS. 3 and 4) installed facing one side wall 65a, An operation rod 6 is provided for operating the paper splicing plate 4 so as to swing. The operating rod 6 is rotatably and slidably connected to the paper splicing plate 4 by a universal joint 7 and a slide structure 9, and is rotatably connected to the support plate 5 by a universal joint 8. there is The slide structure 9 is a structure in which the joint 7 is slidably fitted to a shaft extending parallel to the longitudinal direction of the paper spliced plate 4 . Since the swing shaft 2 is provided at a position offset from the roll holder 60, the splicing plate 4 can be swung with a short swing radius and within a compact range close to the packaging material peripheral surface of the new packaging material roll Fr. to oscillate.

The splicing plate 4 slidably connected to the operating rod 6 occupies the working position shown in FIGS. 2A and 3 by operating the operating rod 6 in the erecting direction, and is operated in the laying down direction. By doing so, the retracted position shown in FIGS. 2(b) and 4 is occupied. In addition, the band-shaped packaging material Fw pulled out or fed out from the packaging material roll Fr is sent away from the zenith of the packaging material roll Fr or a portion in the vicinity thereof.

When the splicer 1 occupies the working position Pw, as indicated by the dashed line in FIG. are pulled back onto the paper splicing plate 4 from the lower end side of the paper splicing plate 4 and held on the paper splicing plate 4 with an adhesive tape or a magnet rubber. The starting end Fws of the new strip-shaped packaging material Fw2 pulled out from the packaging material roll Fr side is pulled out onto the paper splicing plate 4 from the upper end side of the paper splicing plate 4, and is also put on the paper splicing plate 4 with an adhesive tape or a magnet rubber. retained. Since the front end Fwe of the old wrapping material Fw1 and the starting end Fws of the new wrapping material Fw2 appear on the paper splicing plate 4 with the printed front side facing forward, matching of printed patterns can be reliably performed by visual inspection. As a result, paper splicing can be reliably performed without any deviation.

When the splicer 1 occupies the retracted position Pr, as indicated by the solid line in FIG. It has a space-saving and compact structure. In this way, the splicer 1 at the retracted position Pr occupies a position that does not interfere with the subsequent delivery of the band-shaped packaging material Fw from the packaging material roll Fr. In the illustrated state, the guide rollers 75 and 76 play the role of guiding the band-shaped packaging material Fw to the supply route to the packaging machine 50 without interfering with the splicing plate 4 .

According to the paper splicing device 1, with a simple structure in which the paper splicing plate 4 is swung, it can be moved from the retracted position Pr to the working position Pw above or behind the packaging material roll Fr only when necessary for splicing. can be moved. At the work position Pw, the end Fwe of the pulled out old wrapping strip Fw1 and the leading end Fw2 of the new wrapping strip Fw2 can be moved onto the splicing plate 4 so that the printed surface faces the front side. When the packaging machine performs the packaging operation, the splicing plate 4 is retracted to the retraction position Pr below the packaging material roll. Since the splicing plate 4 occupying the retracted position Pr is positioned between the guide rollers 75 and 76 disposed upstream and downstream of the feeding of the band-shaped packaging material Fw, it can be positioned during the packaging operation of the packaging machine. , the belt-shaped packaging material Fw is guided by guide rollers 75 and 76 under the packaging material roll Fr, and the splicing plate 4 does not interfere with the running of the belt-shaped packaging material Fw.

When the splicing device 1 is moved to the working position Pw, the splicing plate 4 is moved together with the guide rollers 75 and 76, so that the guide rollers 75 and 76 move the old and new band packaging materials Fw1 during splicing. , Fw2 to the splicing plate 4, thereby improving workability. Further, when moving to the retracted position Pr, the guide rollers 75 and 76 move together with the splicing plate 4 to the position below the packaging material roll Fr, so that they do not remain at the working position Pw. Therefore, the guide rollers 75 and 76 occupying the retracted position Pr do not obstruct the feeding of the band-shaped packaging material Fw from the packaging material roll Fr together with the paper splicing plate 4. It is utilized as a roller for guiding the running of the wrapped band-shaped packaging material Fw toward the packaging machine. Therefore, the guide rollers 75 and 76 exhibit high functionality and contribute to structural simplification.

FIG. 5 is a diagram showing another embodiment of the splicer according to the invention. The splicing plate 4 of the splicing device 10 is configured to swing, but the guide rollers 75 and 76 are fixed so as to always occupy the retracted position Pr without swinging. A mechanism for swinging the splicing plate 4 may be the same as in the case of the splicing device 1 . The mutual positional relationship between the splicing plate 4 and the guide rollers 75 and 76 when the retracted position Pr is occupied may be the same as in the case of the splicing device 1, but when the splicing plate 4 swings, In order to avoid interference with the guide rollers 75 and 76, the amount of fitting between the guide rollers 75 and 76 may be made shallow. Also, a guide member for guiding the swinging motion of the paper splicing plate 4 may be provided in the vicinity of the side wall 65a. When the splicing plate 4 is moved alone, the weight of the movement can be reduced because the guide rollers 75 and 76 are not moved. The fixed guide rollers 75 and 76 always function as guide rollers, including when the strip-shaped packaging material Fw is delivered. As a simpler structure, the splicing plate 4 and the guide rollers 75 and 76 may be fixed at the working position Pw without swinging.

The connection/operation mechanism from the swing shaft 2 to the operation rod 6 is merely an example, and any other structure may be used as long as it allows the splicing plate 4 and the guide rollers 75 and 76 to swing. The good is clear.

FIG. 6 shows a tensioning device 20 capable of canceling the tensioning action of the dancer rollers 62, 62 on the band-shaped packaging material Fw. That is, a tension imparting device 20 is arranged to apply tension to the belt-shaped packaging material Fw fed out from the packaging material roll Fr by its own weight or biasing force. The tensioning device 20 has a tensioning mode (mode shown in FIG. 6A) in which tension is applied to the band-shaped packaging material Fw during the packaging operation of the packaging machine (the mode shown in FIG. 6A), and at least a tensioning mode for applying tension to the band-shaped packaging material Fw at the time of splicing. It is possible to switch between a tension release mode (mode shown in FIG. 6(b)) in which the tension is released. The tensioning mode is a mode in which the dancer rollers 62 (two dancer rollers are used in this example, but not limited to this) perform normal tensioning functions. In the tension applying mode, as shown in FIG. 6(a), the contact between the output rod 22 and the roller 25 of the lever 23 is removed by disabling the operating mechanism 21 such as an air cylinder, thereby releasing the dancer roller. Tension can be applied to the belt-shaped packaging material Fw by rotating the lever 23 around the rotation shaft 24 using the force of the weight of the lever 23 supporting them and the weight of the lever 23 . In addition, the fixed guide rollers 63, 63 cooperate with the dancer rollers 62, 62 and have the function of storing the belt-shaped packaging material Fw.

In the tension releasing mode, as shown in FIG. 6B, the roller 25 of the lever 23 is pushed down by the output rod 22 of the operating mechanism 21 such as an air cylinder so that the tensioning device 20 does not perform the tension function. It can be obtained by lifting the dancer rollers 62, 62 and the lever 23 supporting them. If the tension applying device 20 provided on the downstream side of the retracted position remains in the tension applying mode during paper splicing by the paper splicing device, when the old wrapping strip Fw1 is cut by the cutter, the end Fwe is taken to the downstream side by the tension of the tensioning device 20, and the paper splicing work at the paper splicing plate 4 becomes complicated and troubles occur. At the time of splicing, by activating the operating mechanism 21 and pushing down the lever 23 with the output rod 22, the tension applying device 20 is switched to the tension release mode, and the end Fwe side of the old belt-shaped packaging material Fw1 cut by the cutter. Since no tension is applied to the end Fwe, the end Fwe can be retained on the paper splicing plate 4 by the adsorption force, and the paper splicing work can be prevented from being hindered.

FIG. 7 is a diagram showing still another embodiment of the splicing device according to the present invention. A paper splicing device 31 shown in FIG. 7 includes a slide body 32 for moving a paper splicing plate 34 . The slide body 32 has a retracted position (position Pr shown in FIG. 7(a)) below the packaging material roll Fr and an advanced position (position Pa shown in FIG. 7(b)) behind the packaging material roll Fr. It is possible to move diagonally in a straight line between them. The slide body 32 consists of a slide rod 36 (only one side is shown) and both slide rods 35 which are slidable by a drive member 33 provided on a machine frame 39 on one side or both sides of the belt-shaped packaging material Fw. A case 37 is provided so as to span the tip and supports the paper splicing plate 34 swingably at the tip end position.

The retracted position Pr in FIG. 7(a) is also the retracted position of the splicing plate 34. At the retracted position Pr, the splicing plate 34 does not interfere with the belt-shaped packaging material Fw guided by the guide rollers 75,76. The paper splicing plate 34 is housed in the case 37 in a non-pivoting state when it is slid and when it occupies the retracted position Pr. When the slide body 32 is slid by the driving member 33 to the advance position Pa, which is the rear position of the packaging material roll Fr, the splicing plate 34 swings backward (to the left in the drawing) with respect to the case 37. As a result, the working position Pw is occupied as shown in FIG. 7(b).

As shown in FIG. 7A, for example, when the strip-shaped packaging material Fw of the packaging roll Fr is used up, the strip-shaped packaging material Fw is cut by a cutting tool C such as scissors or a cutter. As shown in FIG. 7(b), with the splicing plate 34 placed at the working position Pw in which the paper splicing plate 34 is swung backward, the end Fwe of the old packaging strip Fw1 and the start Fws of the new packaging strip Fw2 are separated from each other by the paper. The packaging material can be placed on a splicing plate 34 and spliced with the front side of the packaging material facing upward. In this way, by combining the sliding and swinging motions, the splicing plate 34 can be moved between the retracted position Pr, the working position, and Pw with a simple structure and operation.

As described above, the method and apparatus for splicing paper in the packaging machine according to the present invention have been described with reference to the embodiments, but the present invention is not limited to the illustrated embodiments, and as long as the technical concept of the present invention is followed, appropriate modifications can be made. It goes without saying that additions and changes in processes and structures are possible.

Reference Signs List 1, 10 splicing device 2 rocking shaft 3 rocking plate 4 splicing plate 5 support plate 6 operating rod 7, 8 universal joint 9 slide structure 20 tension applying device 21 operating mechanism 22 output rod 23 lever 24 rotating shaft 25 roller 31 paper splicing device 32 slide body 33 driving member 34 paper splicing plate 36 slide rod 37 case 39 machine frame 50 vertical bag making, filling and packaging machine 51 former 52 vertical sealing device 52a, 52b vertical heat sealing bar 53 filling cylindrical body (filling cylinder) 54 horizontal seal/cut device 54a, 54b horizontal seal cut block 55, 55 packaging material feeder 56 cutter blade 57 groove 60 roll holder 61 printer 62 dancer roller 63 guide roller 65a, 65b side wall 70 paper splicer 71 suction plate 72 Slits 73, 73 Suction hole row 74 Suction holes 75, 75 Guide roller Fr Packaging material rolls fe, fe Edge portion Fw Strip packaging material Ft Cylindrical packaging material Sc Vertical seal Se Horizontal seal B Bag Bp Bag package Fw1 Old strip packaging Material Fwe End Fw2 of Fw1 New strip packaging material Fws Start of Fw2 S Product T Tape Pr Backward position (Retracted position) Pa Advance position Pw Working position C Cutting tool
Dr Direction of rotation of packaging material roll

Claims (8)

A position above or behind the packaging material roll loaded in the roll holder and in the work position for splicingplacedsplicing boardAgainst, placing the end of the old belt-shaped packaging material on the work surface of the paper splicing plate from below the splicing plate with the front side facing up;
Place the starting end of the new strip-shaped packaging material pulled out from the new packaging material roll on the working surface of the paper splicing plate from above the splicing plate with the front side facing up;
The end of the old packaging strip and the beginning of the new packaging strip are spliced together on the working surface of the splicing plate. A paper splicing method in a packaging machine comprising:
The splicing plate is movable between the working position where a splicing operation is performed and a retracted position below the packaging material roll,
When the splicing plate occupies the retracted position, the splicing plate is positioned between guide rollers arranged upstream and downstream of the feeding of the strip packaging material,
the splicing plate is moved from the retracted position to the working position alone or together with the guide roller;
The spliced belt-shaped packaging material is guided by the guide rollers without interfering with the splicing plate occupying the retracted position. thing
A paper splicing method in a packaging machine comprising: When the belt-shaped packaging material is pulled out from the packaging material roll, a pull-off point at which the packaging material roll is separated from the packaging material roll is at or near the zenith position of the packaging material roll,
When the belt-shaped packaging material is pulled out from the packaging material roll, the direction of rotation of the packaging material roll is such that the belt-shaped packaging material pulled out from the separation point of the packaging material roll is properly pulled out from above the splicing plate. A method of splicing in a packaging machine according to claim 1, comprising following the direction of downward movement. A splicing plate capable of occupying a working position for splicing the strip-shaped packaging material above or behind the packaging material roll loaded in the roll holder, and
a guide roller disposed below the packaging material roll for guiding the strip packaging material to the packaging machine;
The leading edge of the new packaging strip pulled out from the new packaging material roll and fed from above the spliced plate with the front side facing up, and the old strip packaging material sent from below the spliced plate with the front side facing up. are placed on the working surface of the splicing plate and splicedpackageSplicing device in packaging machine and
The splicing plate is movable between the working position where the splicing is performed and a retracted position below the packaging material roll,
At the retracted position, the splicing plate is positioned between the guide rollers disposed on the upstream side and the downstream side of the feeding of the belt-like packaging material, and the guide rollers are arranged to move the spliced belt-like material. The traveling of the packaging material can be guided without interfering with the splicing plate,
The splicing plate is movable from the retracted position to the working position alone or together with the guide roller. thing
A splicing device in a packaging machine consisting of When the belt-shaped packaging material is pulled out from the packaging material roll, a pull-off point at which the packaging material roll is separated from the packaging material roll is at or near the zenith position of the packaging material roll,
When the belt-shaped packaging material is pulled out from the packaging material roll, the direction of rotation of the packaging material roll is such that the belt-shaped packaging material pulled out from the separation point of the packaging material roll is properly pulled out from above the splicing plate. 4. A splicer in a packaging machine according to claim 3 , characterized in that it follows the direction of downward movement. To move the splicing plate,
a rocking plate that supports the paper splicing plate and is rockably mounted on the machine frame; and an operating rod that is connected by a universal joint and can be raised and lowered,
5. A paper splicer in a packaging machine according to claim 3 , wherein said paper splicing plate occupies said working position by swinging said rocking plate to a predetermined position according to the undulation of said operating rod. Device. To move the splicing plate,
a slide body that rockably supports the splicing plate and is slidable with respect to a machine frame between a position below the packaging material roll and a position behind the packaging material roll,
5. The splicing plate assumes the working position by swinging backward relative to the slide when the slide is slid to the rear position of the packaging material roll. A splicing device in the packaging machine according to . A tension applying device is provided to apply tension to the belt-shaped packaging material fed out from the packaging material roll by its own weight or biasing force,
The tension imparting device has a tension imparting mode in which tension is applied to the strip-shaped packaging material during the packaging operation of the packaging machine, and a tension release mode in which the tension on the strip-shaped packaging material is released at least during the splicing. A splicer in a packaging machine according to any one of claims 3 to 6 , characterized in that it is switchable between . The packaging machine is a bag-making, filling and packaging machine that continuously manufactures bag packages in which products are put into bags while forming bags from the band-shaped packaging material fed out from the packaging material roll. A splicing device in a packaging machine according to any one of claims 3 to 7 , comprising:

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