JP5033445B2 - Filling cylinder structure in a vertical bag making and filling machine - Google Patents

Description

  The present invention guides a cylindrical packaging material in a vertical bag making and filling packaging machine that manufactures a bag packaging by sequentially repeating the formation of a bag from a belt-shaped packaging material and the filling of the package into the bag. The present invention relates to a filling cylinder structure in which a package is put into a packaging bag through the inside, and more particularly, to a filling cylinder structure in a vertical bag making filling packaging machine used for packaging a package in a bag with air blowing or gas filling.

  FIG. 5 is a schematic perspective view showing an example of a conventional vertical bag making and filling machine. In the vertical bag making and filling machine 50, a belt-like packaging material 60 is formed into a cylindrical packaging material 61 by a former 51. Center sealing is performed by the center sealing means 52. The cylindrical packaging material 61 is filled with a product S which is a package dropped on the filling cylinder 53. The end seal / cut means 54 applies end seal to the cylindrical packaging material 61 to manufacture the bag package 63 formed in advance and packaged with the product S as a package, and at the same time of the product S. An end seal on the bottom side of the bag 62 to be charged is formed. On both the left and right sides of the outer periphery of the filling cylinder 53, a packaging material feed belt mechanism 55 for feeding the cylindrical packaging material 61 is disposed. The seal cut blocks 54a and 54b constituting the end seal cut means 54 operate so as to approach and separate from the cylindrical packaging material 61, and are sandwiched in a direction crossing the cylindrical packaging material 61 when approaching. And an end sealer for forming a bottom end seal for the bag 62 and an end sealer for forming an upper end seal for the bag packaging 63.

  The end seal / cut means 54 further includes a cutter blade 56 that cuts the tubular packaging material 61 in a form that breaks through the tubular packaging material 61 between both end sealers. The cutter blade is attached to one seal cut block 54a between the upper end sealer portion and the lower end sealer portion, and the other seal cut block 54b includes both seal cut blocks. A groove 57 into which the cutter blade 56 enters when 54a and 54b approach each other is formed. When both seal / cut blocks 54a and 54b approach, the upper and lower end sealers sandwich the packaging material to weld the cylindrical packaging material 61 to form the end seal portion, and at the same time, the cutter blade 56 is the cylindrical packaging material. Cut in a way that breaks through 61. In addition, a pair of tension guides 59, 59 for tensioning the tubular packaging material 61 to both outer sides in the diameter direction are provided at the lower end of the filling cylinder 53 so as to extend obliquely downward.

  In the vertical bag making filling and packaging machine as shown in FIG. 5, in the case of air blowing packaging or gas replacement packaging, a pipe 58 connected to a gas source provided outside is extended inside the filling cylinder. When filling a package with a package through the inside of a filling cylinder, air or an inert gas is blown into the bag from a pipe, so that the bag is inflated with air, or the gas is filled with an inert gas. Got the packaging.

  The pipe for supplying air or inert gas is connected from the outside to the filling cylinder in the filling cylinder at a position before it is formed in the belt-like packaging material or the cylindrical packaging material in order to avoid interference with the cylindrical packaging material. ing. The supply pipe further extends through the inside of the filling cylinder, preferably from the tip of the filling cylinder to the vicinity of the position of the end sealer forming the end seal. Depending on the size of the inner diameter of the cylinder, a U pipe or a square guide is provided to support various parts such as a supply pipe, and the U pipe or the square guide is placed inside the filling cylinder when the package to be filled is caught. May cause bridging of the package. Further, when the package is a fragile item such as a granular material or a snack confectionery, the particles of the confectionery or the confectionery tend to adhere to parts such as a U pipe or a square guide in the filling cylinder. Therefore, it is necessary to periodically or temporarily clean the inside of the filling cylinder, but in order to clean and clean the inside of the cylinder, it is necessary to remove the filling cylinder from the packaging machine and to clean all corners. There is also a problem that workability is poor, such as a long work time for cleaning.

  In addition, in the filling cylinder that passes through the gas supply pipe, the portion where the package is dropped and filled in order to eliminate the opportunity for powder particles and pieces of snack confectionery to adhere to parts such as U pipes or square guides. In some cases, a partition plate is inserted into the inside of the filling cylinder and the partition plate is fixed to the cylinder body by welding to distinguish between the gas supply pipe and the portion where the gas supply pipe is disposed. However, with such a structure, long and inefficient work is required for polishing at the welded part and for complete cleaning. Some powder and confectionery fragments rise even if they are put into the bag and enter and attach to the inside of the partition from the lower end of the filling cylinder, which is inconvenient and inefficient for cleaning and washing them. Be strong.

  In addition, with the recent trend of small-lot production of various varieties, opportunities for packaging various types of food with a single packaging machine are increasing. In the case of bag-wrapping a food with a changed type against the background of growing interest in food allergies, ensure that no small amount of the type of food that has been previously packed is left in the packaging machine. Is required. Therefore, more time is required for cleaning and washing the filling cylinder.

A replacement gas introduction tube for replacing the inside of the packaging bag with an inert gas such as air or nitrogen gas is placed in the film guide tube (filled cylinder), and these gases are fed into the packaging bag at the time of bag making. Has proposed a vertical bag-filling and packaging device that expands the space inside the packaging bag or replaces gas (Patent Document 1).
JP-A-8-40405 (paragraph 0027, FIG. 6)

  Therefore, a vertical product is manufactured in which a bag package is manufactured by sequentially repeating formation of a bag from a belt-shaped packaging material and filling of the package into the bag, and packaging of the package with air blowing or gas filling is performed. In a bag filling and packaging machine, a gas passage for injecting air or replacement gas is placed outside the charging passage of the filling cylinder into which the package is charged, and the package or its fragments adhere to the inner surface of the charging passage of the filling cylinder. There is a problem to be solved in that it is easy to clean and clean the inner surface of the charging passage of the filling cylinder even if they adhere.

  The object of the present invention is to place a gas passage for injecting air or replacement gas outside the charging passage of the filling cylinder into which the package is charged to ensure a sufficient width of the packing input passage of the filling cylinder. In addition, the package and its fragments are less likely to adhere to the inner surface of the charging passage, and even if they adhere, the inner surface of the charging passage can be easily cleaned and washed. It is possible to keep the inner surface of the input passage clean at all times, and also from the viewpoint of food allergies, when packaging different food products, the food product that has been packaged so far does not remain in the filling cylinder even in a small amount. It is an object of the present invention to provide a filling cylinder structure that can efficiently perform reliable cleaning and washing.

  In order to solve the above-described problems, the filling cylinder structure in the vertical bag making filling and packaging machine according to the present invention is a bag packaging body in which the formation of a bag from a belt-shaped packaging material and the filling of the package into the bag are sequentially repeated. In an upright bag-making filling and packaging machine for manufacturing the outer cylindrical body used for forming the cylindrical packaging material while guiding the belt-shaped packaging material in a curved state along the outer peripheral surface, and the outer cylinder An inner cylindrical body that is fitted into the body and is used to put the package into the bag formed of the cylindrical packaging material, and the inner cylindrical body from the outer side to the inner side. A longitudinal groove extending in the longitudinal direction of the depression is formed, and the longitudinal groove is covered with an inner surface of the outer cylindrical body to form a gas passage for supplying air or a filling gas into the bag.

According to the filling cylinder structure in this vertical bag making and packaging machine, this filling cylinder structure has a double cylinder structure of an outer cylinder and an inner cylinder, and the outer peripheral surface of the outer cylinder is a belt-shaped packaging material. Is used to form a tubular packaging material while guiding the running in a curved state, and the cylindrical interior of the inner cylindrical body is used to put the package into a bag formed from the tubular packaging material. A gas passage is formed between the outer cylinder and the inner cylinder by covering the inner side of the outer cylinder with a longitudinal groove formed in a manner extending in the longitudinal direction by recessing the inner cylinder from the outside to the inside. Has been. Therefore, the gas passage is placed outside the charging passage of the filling cylinder into which the package is charged, and the cylindrical inside of the filling cylinder is used only as the charging passage for the packaging. The package and its fragments are difficult to adhere to the cylindrical inner surface of the filling cylinder. Moreover, even if a package or its fragments adheres, there are no parts that obstruct the cleaning / cleaning on the inner surface of the charging passage of the filling cylinder, and the environment becomes easy to clean / clean. Since the gas passage is formed between the inner and outer cylinders, it is not necessary to provide a dedicated pipe.

In the filling cylinder structure in this vertical bag making filling and packaging machine, the outer cylinder is provided with a fluid supply pipe connected to an air source or a filling gas source at an upstream position from which the belt-like packaging material starts to be wound in a curved state. the connectable plug that is attached in a state to be connected to the gas passage. Because of this structure , the plug that can be connected to the fluid supply pipe is provided at a position that does not interfere with the belt-shaped packaging material wound in a curved state. Air or replacement gas from the fluid supply pipe passes through the plug, immediately enters the gas passage formed between the inner and outer cylinders, and is sent toward the distal end side of the cylindrical packaging material.

  In the filling cylinder structure in this vertical bag making filling and packaging machine, the inner cylinder has one or a plurality of auxiliary parts that are recessed from the outside to the inside at different positions in the circumferential direction from the longitudinal groove and that extend parallel to the longitudinal groove. A groove unit is formed, and a roller unit that smoothly fits the outer cylindrical body can be disposed in the auxiliary groove. According to this structure, when the inner cylinder is inserted into the outer cylinder, the roller unit disposed in the auxiliary groove guides the insertion by rolling contact, so that the workability of assembling the filling cylinder structure is improved. To do.

  In the filling cylinder structure in the vertical bag making filling and packaging machine in which the gas passage and the auxiliary groove are formed, the outer cylinder and the inner cylinder are fixed by welding at the inner and outer fitting portions at both ends in the longitudinal direction, The end of the groove where the auxiliary groove opens on the delivery side of the tubular packaging material can be closed by an end cover. The inner and outer fitting portions at both ends in the longitudinal direction of the outer cylinder and the inner cylinder are fixed by welding, and the groove end where the auxiliary groove opens is closed with an end cover, so that the gap between the outer cylinder and the inner cylinder is closed. Since all the gas passages are closed except for the groove ends that open on the delivery side of the cylindrical packaging material, it is possible to prevent the package and its fragments from adhering to the space and becoming a source of contamination. Since the supplied air and gas blow out from the gas passage at all times, the package and its fragments do not enter the gas passage.

  In the filling cylinder structure in the vertical bag making filling and packaging machine in which the gas passage and the auxiliary groove are formed, the vertical groove and the auxiliary groove are placed in the inner cylinder and correspond to the vertical groove and the auxiliary groove. Can be press-molded by a cored bar cylinder formed with a pressing jig pressed against the groove across the inner cylinder. The filling cylinder structure is made into a double structure, the necessary recesses for the gas passage and auxiliary groove are applied by a press from the outside of the inner cylinder, and the outer cylinder is covered to form an air blowing / gas passage. Therefore, the gas passage and the auxiliary groove can be formed by a simple processing operation. Moreover, since it forms by press, the inner surface of an inner side cylinder can be formed in a smooth curved surface, and the structure where a package and its fragments are hard to adhere is obtained.

In the filling cylinder structure in this vertical bag making filling and packaging machine, the outer cylinder and the inner cylinder are formed with an inner window and an outer window that substantially overlap each other on the peripheral surface, and the inner window is closed and covered. It is close by. By removing the closure lid, the inner window opens and the interior of the inner cylinder can be accessed through the inner window and the outer window substantially overlapping therewith. If cleaning and washing are completed, the filling cylinder structure can be returned to a usable state by closing the inner window with a closing lid.

  In the filling cylinder structure in the above vertical bag making filling and packaging machine that closes the inner window with a closing lid, the outer window formed in the outer cylinder is more circumferential than the inner window formed in the inner cylinder. And the edge of the inner window of the inner cylindrical body is left as a shelf inside the edge of both sides in the circumferential direction of the outer window, and the closing lid is guided by the shelf and fitted into the inner window. In combination, the inner window can be closed. With such a structure that leaves the shelf part, the closed lid is placed in the inner window and stored in a predetermined position, and the inner cylinder body has a smooth cylindrical surface to which the package and its fragments are easily attached. This makes it possible to simplify the opening and closing operation of the inner window.

  In the filling cylinder structure in the above-described vertical bag making filling and packaging machine that closes the inner window with the closing lid, it is preferable to form a removal hole in the closing lid that can be removed by hanging with a finger. The closed lid is flush with the inner cylindrical body in the closed state, and there is no place to grip for removal. By forming a removal hole for placing a finger on the closing lid, it is possible to easily remove the closing lid fitted to the inner window by placing the finger on the removal hole. Conversely, the closing lid can be easily fitted to the inner window.

  In the filling cylinder structure in the above vertical bag making filling and packaging machine that closes the inner window with a closing lid, the inner window is formed with a recess extending in the vertical direction beyond the edge of the outer window, and the closing A convex part that fits into the concave part can be formed on the lid. By fitting the concave and convex with the inner window of the closing lid, the closing lid can be positioned at a predetermined position with respect to the inner window.

As described above, when there are obstacles such as pipes or attachment parts inside the conventional filling cylinder, fragile packages such as powders and snacks are easily attached, and the attached dirt becomes attached. Long and inefficient cleaning / cleaning operations have been forced to clean the kimono completely, but in the filling cylinder structure in the vertical bag making filling and packaging machine according to the present invention, the inside of the filling cylinder is convex. The gas passage corresponding to the feed pipe for injecting air or replacement gas is a filling cylinder into which a package is charged. The surface inside the filling cylinder is smooth due to the fact that it is formed outside the charging passage, and it is difficult for powder particles and confectionery debris to adhere to it. It becomes a structure. Therefore, as a countermeasure against food allergies, when packaging different food products, a reliable cleaning and washing of the inside of the filling cylinder is performed in a short time so that a small amount of the food product that has been packed so far does not remain in the filling cylinder. Can be performed efficiently. In addition, the outer cylinder and the inner cylinder are formed with an inner window and an outer window that substantially overlap each other on the peripheral surface, and the inner window is closed with a closed lid. Is opened, the inside of the inner cylinder is accessed through the inner window and the outer window substantially overlapping therewith, and the inside can be reliably and easily cleaned. If cleaning and washing are completed, the filling cylinder structure can be returned to a usable state by closing the inner window with a closing lid.

  Below, with reference to drawings, the filling cylinder structure in the vertical packaging machine by this invention is demonstrated. FIG. 1 is a view showing an outer cylinder of a filling cylinder structure configured in an inner and outer double cylinder type according to the present invention, (a) is a front view of the outer cylinder, and (b) is an outer cylinder. FIG. FIG. 2 is a view showing an inner cylinder of a filling cylinder structure configured in a double cylinder type according to the present invention, in which (a) is a front view thereof, (b) is a rear view thereof, and (c) is a side view thereof. FIG. 4D is a cross-sectional view taken along the dd plane in FIG. The filling cylinder structure according to the present invention can be applied to a vertical bag making filling and packaging machine as shown and described in FIG. 5, and a repetitive description of the packaging machine will be omitted below.

  In FIG. 1, the outer cylinder 10 is comprised by the cylindrical body 12 with the circular cross section attached to the flange 11 fixed to the machine frame of a packaging machine. A plug (joint) 15 for connecting a fluid supply pipe is attached to the upper part of the cylindrical body 12 just below the flange 11. The plug 15 is disposed at the upstream position immediately before the side edges of the packaging material in which the band-shaped packaging material is formed in a curved shape by the former are overlapped by the vertical heat sealer, so that the band-shaped packaging material or the curved packaging material is formed. Does not interfere with.

  As shown in the front view of FIG. 1 (a), a pair of tension guides 16 are provided at a position in the circumferential direction at the lower end 14 of the cylindrical body 12 at a position where a stopper 15 is attached and a position opposed to the diameter direction. , 16 (corresponding to the tension guides 59, 59 of the conventional example shown in FIG. 5) are provided obliquely projecting outward and downward. In the figure, only the tension guide 16 on the front side of the paper is shown, and the other tension guide 16 is hidden behind the tension guide 16 on the front side. The tension guides 16 and 16 tension the cylindrical packaging material that travels while covering the outer cylindrical body 10 from the inside toward the diametrically opposed outer sides, and then the cylindrical packaging material (the conventional example shown in FIG. 5). The end sealing performed by sandwiching the cylindrical packaging material 61 is facilitated. As shown in FIG. 3C, the fluid supply pipe 31 connected to the plug 15 is connected to an external air source or a filling gas source, and the air or the filling gas supplied through the plug 15 will be described later. Through the gas passage formed in the filling cylinder, it is blown out from the lower end of the filling cylinder and is fed into the inside of the cylindrical packaging material fed out below the outer cylinder 10, and the inside of the manufactured bag packaging body P It can be inflated with air or replaced or filled with a filling gas.

  As shown in the rear view of FIG. 1B, in the outer cylinder 10, the position opposite to the position where the plug 15 is attached is diametrically opposite and extends from the middle to the lower end 14 in the longitudinal direction (axial direction). Thus, a rectangular outer window 18 that is long in the vertical direction (vertical direction) is opened. The outer window 18 substantially overlaps with an inner window 28 formed in the inner cylinder 20 described later, and allows access to the inside of the filling cylinder from the outside.

  In FIG. 2, the inner cylinder 20 is a substantially cylindrical body 22 that is fitted in the outer cylinder 10 with almost no gap, and the axial length is the same as the length of the outer cylinder 10. As shown in FIG. 2 (a), the inner cylinder 20 is formed with a longitudinal groove 25 for forming a gas passage through which air or a filling gas passes in the form of a recess from the outside to the inside. Has been. The longitudinal groove 25 is formed at a position where the stopper 15 is attached as a circumferential position, and includes the attachment position of the stopper 15 in the axial direction, but the recess is interrupted in the upper direction, and the downward direction. Is formed open at the lower end 24 while remaining hollow. The longitudinal groove 25 can be formed by deforming the inner cylindrical body 20 so as to be recessed in an arc shape by a press whose details will be described later.

  As shown in FIG. 2 (c), the inner cylindrical body 20 is located at a position 90 ° away from the position where the longitudinal groove 25 is formed and the circumferential direction from the outside in the same manner as the longitudinal groove 25. Auxiliary grooves 26 and 27 are formed as longitudinal grooves extending in the axial direction in the form of depressions inward. The auxiliary grooves 26 and 27 have a flat groove bottom as shown in a cross-sectional shape in FIG. 2D. However, like the vertical groove 25, the recesses are interrupted in the upper direction, and the downward direction Is formed open at the lower end 24 in a hollow state. In the auxiliary grooves 26 and 27, as will be described later, a roller unit 32 having a large number of rollers 32a arranged side by side is arranged.

  As shown in FIG. 2B, in the inner cylinder 20, the position where the longitudinal groove 25 is formed is opposite to the position in the diametrical direction and from the middle to the lower end in the longitudinal direction (axial direction). A substantially rectangular inner window 28 is opened. The inner window 28 has a width Wi slightly narrower than the width Wo of the outer window 18 formed in the outer cylindrical body 10, and is longer than the edge of the outer window 18 in the vertical direction (axial direction). Concave portions 28a, 28a extending outward are formed. The center positions in the width direction of the outer window 18 and the inner window 28 coincide.

  FIG. 3 is a diagram showing an example of a filling cylinder structure configured in a double cylinder type according to the present invention, and shows a state in which the inner cylinder shown in FIG. 2 is inserted into the outer cylinder shown in FIG. . 3A is a front view of the filling cylinder structure, FIG. 3B is a rear view of the filling cylinder structure shown in FIG. 3A, and FIG. 3C is a bottom view of the filling cylinder structure shown in FIG. In the filling cylinder structure 1 in which the outer cylinder 10 and the inner cylinder 20 are overlapped, the entire circumference of the upper end 13 of the outer cylinder 10 and the upper end 23 of the inner cylinder 20, and the lower end 14 and the inner side of the outer cylinder 10 are arranged. Welding is performed at a peripheral portion close to the inside and outside of the lower end 24 of the cylindrical body 20. A welded portion 35 is shown in FIG. 3C for the lower end of the filling cylinder structure 1. Further, since the auxiliary grooves 26 and 27 are formed open at the lower ends 14 and 24, as shown in FIG. 3C, the particles are easily broken or broken when the filler is a powder. The open ends of the auxiliary grooves 26, 27 are closed by end lids 30, 30 so that the package fragments do not enter the auxiliary grooves 26, 27. As shown in FIG. 3D, the roller units 32 and 32 disposed in the auxiliary grooves 26 and 27 are configured by rotatably arranging a large number of rollers 32a, and the outer cylinder 10 is assembled at the time of assembly. And the inner cylindrical body 20 can be smoothly fitted to each other by rolling resistance.

  In the filling cylinder structure 1, the vertical groove 25 coincides with the position of the plug 15, so that the air or the filling gas supplied from the external air source or the filling gas source through the fluid supply pipe 31 is supplied from the plug 15 to the vertical groove. 25 is blown out from the open end of the gas passage 34 at the lower end of the filling cylinder structure 1 through the gas passage 34 surrounded by the inner surface of the outer cylinder 10 and fed into the cylindrical packaging material that travels over the outer cylinder 10. It is. The excess air or filling gas that has entered the bag formed from the cylindrical packaging material is discharged upward through the inner cylindrical body 20.

As shown in FIG. 3 (b), on the back side of the filling cylinder structure 1, the outer window 18 of the outer cylinder 10 is wider than the inner window 28 of the inner cylinder 20. Shelves 29 and 29 are formed on both sides in the circumferential direction on the inner side of the edge. The recesses 28a, 28a formed in the inner window 28 of the inner cylinder 20 so as to extend in the vertical direction are covered with the outer cylinder 10 and do not appear in the outer window 18 of the outer cylinder 10. The inner window 28 is covered with a closing lid 33 shown in FIG. By making the closing lid 33 slant, it can be moved from the outside to the inside of the inner cylinder 20 through the outer window 18 and the inner window 28, and then just inserted into the inner window 28 from the inner side of the inner cylinder 20. The inner window 28 can be closed by moving in this manner. The closing lid 33 has convex portions 33a, 33a formed on both sides in the longitudinal direction (longitudinal direction) from the inner side of the inner cylindrical body 20 , and enters the concave portions 28a, 28a, and guides to the edge portions of the shelf portions 29 , 29. Thus, the inner window 28 can be closed. The closing lid 33 is fixed to the filling cylinder structure 1 by an appropriate fixture such as a metal fitting. For example, the fixture is locked by using the shelves 29 and 29 so as to fit within the envelope curved surface of the filling cylinder structure 1, thereby preventing smooth running of the cylindrical packaging material. It is preferable not to have any.

  Removal holes 33b and 33b are formed in the closing lid 33 at appropriate positions in the center. When cleaning the inside without removing the filling cylinder structure 1, by inserting a finger into the removal holes 32 b, 32 b of the closing lid 33 and removing the closing lid 33 fitted in the inner window 28 of the inner cylinder 10, The inside of the inner cylinder 20 can be accessed through the outer window 18 and the inner window 28, and the inside of the inner cylinder 20 can be cleaned by blowing air with an air gun, or can be cleaned by spraying a cleaning liquid or the like. On the inner surface of the inner cylindrical body 20, raised portions are formed when the longitudinal grooves 25 and the auxiliary grooves 26 and 27 are press-formed. However, since the surface is smooth, the granular material that is a package or a fragile confectionery is used. There are no parts that are stuck and stuck. Even if these objects are attached, cleaning and washing are very easy through the outer window 18 and the inner window 28, and the workability can be improved by shortening the cleaning and washing time.

  FIG. 4 is a schematic diagram illustrating an example of a molding mode when press-molding an inner cylinder body having a filled cylinder structure. FIG. 4 shows an example of a method for forming the vertical groove 25 or the auxiliary grooves 26 and 27 by press molding. The cylindrical body 22 is fitted into a cored bar 40 having a diameter slightly smaller than that of the cylindrical body 22. Groove molds 41 to 43 corresponding to the longitudinal grooves 25 and the auxiliary grooves 26 and 27 are formed in the core metal 40 in advance. On the other hand, the pressing jig 44 has a pressing die 45 corresponding to the vertical groove 25. The cylindrical body 22 is pressed between the pressing mold 45 and the groove mold 41 by pressing the pressing jig 44 from the outside of the cylindrical body 22 with the pressing mold 45 facing the groove mold 41 of the core metal 40. The auxiliary grooves 26 and 27 can also be formed by pressing between a pressing jig having a corresponding pressing die and the groove dies 42 and 43. Since the vertical groove 25 and the auxiliary grooves 26 and 27 are formed to open at one end of the cylindrical body 22, the cored bar 40 can be pulled out from the processed cylindrical body 22 when the press working is completed. By forming the groove molds 41 to 43 on a smooth processed surface, the cylinder inner surface of the inner cylinder 20 is formed smoothly, and powder particles and confectionery debris and the like are used when filled as a filling cylinder. It becomes difficult to adhere. In addition, dirt can be efficiently removed during cleaning and washing.

It is a figure which shows the outer side cylinder of the filling cylinder structure comprised by the inside and outside double cylinder type | formula by this invention. It is a figure which shows the inner side cylinder of the filling cylinder structure comprised by the double cylinder type by this invention. It is a figure which shows an example of the filling cylinder structure comprised by the double cylinder type | formula by this invention. It is a schematic diagram which shows an example of the shaping | molding aspect at the time of press-molding the inner cylinder body of a filling cylinder structure. It is a figure which shows an example of the conventional vertical bag making filling packaging machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filling cylinder structure 10 Outer cylinder 11 Flange 12 Cylindrical body 13 Upper end 14 Lower end 15 Plug (joint)
16 Tension guide 18 Outer window 20 Inner cylinder 22 Cylindrical body 23 Upper end 24 Lower end 25 Vertical groove 26, 27 Auxiliary groove 28 Inner window 28a Recess 29 Shelf 30 End lid 31 Fluid supply pipe 32 Roller unit 32a Roller 33 Closed lid 33a Convex Portion 33b Removal hole 34 Gas passage 35 Welded portion 40 Core metal 41-43 Groove mold 42 Press jig 45 Press mold Wo Outer window width Wi Inner window width

Claims (7)

In a vertical bag making filling and packaging machine for producing a bag package by sequentially repeating the formation of a bag from a belt-shaped packaging material and filling of the package into the bag,
An outer cylinder used to form a cylindrical packaging material while guiding the belt-shaped packaging material in a curved state along the outer peripheral surface, and an outer cylindrical body that is fitted into the outer cylindrical body and the cylindrical interior is the cylinder An inner cylinder used to put the package into the bag formed from a wrapping material,
The inner cylinder is formed with a longitudinal groove that is recessed from the outside to the inside and extends in the longitudinal direction, and the longitudinal groove is covered with the inner surface of the outer cylinder to form a gas passage for supplying air or a filling gas into the bag. Has been
A plug that can be connected to a fluid supply pipe connected to an air source or a filling gas source is attached to the outer cylindrical body at a position upstream from the start of winding of the strip-shaped packaging material in a curved state. And
The outer cylindrical body and the inner cylindrical body are formed with an inner window and an outer window that substantially overlap each other on a peripheral surface, and the inner window is closed by a closing lid.
A filling cylinder structure in a vertical bag making filling and packaging machine . The outer window formed on the outer cylinder is formed wider in the circumferential direction than the inner window formed on the inner cylinder, and the inner side of the outer window on both sides in the circumferential direction is the inner window. edge of the inner window of the cylindrical body have been left as shelves, said closed lid according to claim 1, characterized in that closed fitted to the inner window is guided by the shelf Filling cylinder structure in vertical bag making filling and packaging machine . The filling cylinder structure in the vertical bag making filling and packaging machine according to claim 1 or 2 , wherein the closing lid is formed with a removing hole that allows removal by hooking with a finger. . The inner window is formed with a recess extending in the vertical direction beyond the edge of the outer window, and the closing lid is formed with a protrusion that fits into the recess. filling tube structure in a vertical bag filling and packaging machine according to any one of 1 to 3. The inner cylindrical body is formed with one or a plurality of auxiliary grooves that are recessed inward from the outside and extending in parallel with the vertical grooves at positions different from the vertical grooves in the circumferential direction. The filling cylinder structure in the vertical bag making filling and packaging machine according to any one of claims 1 to 4 , wherein a roller unit is provided for smooth fitting with the outer cylinder. The outer cylindrical body and the inner cylindrical body are fixed by welding at inner and outer fitting portions at both ends in the longitudinal direction, and the groove end where the auxiliary groove opens on the delivery side of the cylindrical packaging material is an end. 6. The filling cylinder structure in the vertical bag making filling and packaging machine according to claim 5 , wherein the filling cylinder structure is closed by a lid. The longitudinal groove and the auxiliary groove are disposed in the inner cylinder and are formed with a core metal cylinder in which grooves corresponding to the vertical groove and the auxiliary groove are formed, and toward the groove with the inner cylinder interposed therebetween. filling tube structure in a vertical bag filling and packaging machine according to claim 5 or 6, characterized in that it is press-molded by a press jig pressed.

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