JP2011136714A - Bag-making/filing cylinder for vertical bag-making/filling packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag-making/filling cylinder that achieves satisfactory falling characteristic, maintenance, and hygiene at the same time for a vertical bag-making/filling packaging machine. <P>SOLUTION: In the structure of the bag-making/filling cylinder 32, an angular cylinder has a double cylindrical system, in which an outer cylindrical body 30 and an inner cylindrical body 31, formed such that the four corners of an angular cylindrical body have smooth curved or obtuse angles, are fitted one inside the other. The vertical openings 35a to 35d in an empty space defined between the outer and inner cylindrical bodies 30 and 31 are sealed by lids 33 and 34, other than one for a gas supply pipe 5. When the four corners of a bag are finished with hem-sealing, the angular bag-making/filling cylinder 32 enables satisfactory hem-sealing. Since the internal surface of the angular bag-making/filling cylinder 32 is smooth, falling characteristic for item being packaged and hygiene such as maintenance and cleaning are insured. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 bag making and filling cylinder structure in which a package is inserted through the inside.

  2. Description of the Related Art As a bag making and filling machine that manufactures a bag and wraps a product to be packaged in the bag, there is a vertical bag making and filling machine that feeds packaging material and supplies the product to be packed in a vertical direction. A vertical bag making filling and packaging machine is formed into a substantially cylindrical shape when a belt-shaped packaging material fed in the vertical direction is bent in a curved shape by a cylinder making machine and travels along the outer peripheral surface of the bag making and filling cylinder. In the cylindrical packaging material in which the bag bottom is formed by applying a center seal to the seam of the packaging material molded in a substantially cylindrical shape and forming the bag bottom by applying an end seal. A bag package body in which the packaged product is packaged in a packaging bag is manufactured by charging or filling the packaged product into the bag making and filling cylinder and applying end sealing to a portion corresponding to the bag mouth. By repeating the above-described steps (feeding of packaging material, formation of a cylinder, formation of a bag bottom, charging or filling of a packaged product, sealing of a bag mouth), a bag package can be continuously manufactured.

  In order to improve the flowability and product display properties of the bag packaging body, it is required to make the shape of the bag packaging body close to a square shape. In order to meet this requirement, a method and an apparatus have been devised in which the bag is a square bottom gusset bag or the six sides of the bag are flat. In the case of such a packaging form, in order to maintain the square shape of the bag, a hem seal having an increased strength may be formed by applying a seal to the corner portion where the side surfaces of the bag intersect each other. In such a case, in order to provide a good hem seal, a square bag making and filling cylinder having a square cross section is used (see Patent Document 1). FIG. 10 is a schematic perspective view showing an example of such a vertical bag making filling and packaging machine.

  When manufacturing a square bottom shaped packaging body as described above, the shape may be stabilized by blowing air into the bag body. In addition, when the packaged product is a food product, the air in the packaging bag is a chemically stable gas (inert gas) that is harmless to the human body, such as nitrogen gas, for the purpose of preventing deterioration of the packaged product due to oxidation etc. ) (See Patent Document 2 and Patent Document 3). Further, when the air in the bag is replaced with an inert gas, a residual oxygen detector for checking the gas replacement rate may be attached.

  In the case of a vertical bag making and filling machine using a square bag making and filling cylinder, the square bag making and filling cylinder is usually manufactured by bending a sheet metal, so that a good hem seal is formed on the square bag. Further, since the inner surface is also square, a packaged item or a fragment of the packaged item is likely to adhere to the inner corners of the four corners. In particular, when the packaged item is a granular material or a fragile item such as a snack confectionery, adhesion of powder particles or confectionery fragments tends to occur.

  Further, when performing the above-described air blowing, inert gas replacement, and residual oxygen detection associated therewith, a pipe is disposed in the bag-filling cylinder for blowing or sucking into the packaging bag. In order to avoid interference with the cylindrical packaging material, the pipe for air supply or exhaust is connected to the bag making and filling cylinder from the outside at a position before the belt-shaped packaging material is formed on the cylindrical packaging material. Yes. The pipe for air supply or exhaust further extends through the inside of the bag making and filling cylinder, preferably from the tip of the bag making and filling cylinder to the vicinity of the position of the end sealer forming the end seal. It is normal. Depending on the size of the inner diameter of the bag making and filling cylinder, a U pipe or a square guide is provided in the bag making and filling cylinder to support various parts such as a gas supply pipe. These U pipes or corner guides may cause a bridging of the package in the bag making and filling cylinder when the packaged material to be filled is caught. In addition, 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.

  As described above, in the case of a vertical bag making and filling machine using a square bag making and filling cylinder, since powder particles and confectionery fragments are likely to adhere to the four corners, a cylindrical bag making used for general pillow packaging It is necessary to clean and clean the inside of the cylinder more carefully than the filling cylinder. When air blowing or inert gas replacement is involved, the pipes are installed in the cylinder for air supply or exhaust.・ The need for cleaning is further increased. Further, when a package bridge is generated in the bag making and filling cylinder due to the article to be packaged being caught by the pipe, temporary cleaning / washing in the cylinder is required. When cleaning and cleaning the inside of the cylinder, it is necessary to clean and wash all four corners in the cylinder and the corners and gaps between the inner surface of the cylinder and the contact part of the pipe. There is also the problem of bad nature.

Japanese Patent Laying-Open No. 2005-153939 (Claim 3, Claim 8, Paragraph 0015, FIG. 2) JP-A-8-40405 (paragraph 0027, FIG. 6) Japanese Patent Laid-Open No. 10-53217 (Claim 4, paragraph 0002, FIG. 2)

  Even in the case of manufacturing a bag package using a bag making and filling cylinder having a square cross section in a vertical bag making and filling machine, good drop characteristics of the packaged product put in the inside of the square bag making and filling cylinder There is a need for a square bag-filling cylinder that has maintainability and hygienic properties that make it difficult to adhere powder particles and debris, and even if they adhere, it simplifies cleaning.

  An object of the present invention is to solve such a conventional problem, and the shape of a bag-filling cylinder having a square cross section, a good drop characteristic, and maintenance and hygiene are possible. It is providing the bag making filling cylinder in a bag filling packaging machine.

  In order to solve such problems, the present invention is a vertical bag filling and packaging machine for manufacturing a rectangular bag package by sequentially repeating the formation of a rectangular bag from a belt-shaped packaging material and the introduction of a packaged product into the bag. The cross-section used to form the cylindrical packaging material while guiding the belt-shaped packaging material along the outer peripheral surface, and the rectangular outer cross-section is fitted into the outer cylindrical body and Constructed in a double structure in which the inner peripheral surface of the inside into which the packaged product is placed is smoothly fitted, and formed between the outer cylindrical body and the inner cylindrical body It is a bag making and filling cylinder structure characterized in that the gap is hermetically sealed at the opening that opens at the upper and lower ends.

In the bag making and filling cylinder structure in this vertical bag making and filling machine, the inner peripheral surface of the inner cylinder is a combination of one or a plurality of arc-shaped concave curved surfaces or a plurality of continuous bent curved surfaces bent at an obtuse angle. Can be formed smoothly.
The inner cylindrical body is a rectangular cylindrical body whose outer edge is in contact with the inner edge of the outer rectangular cylindrical body, and the inner surfaces of the four corners are bent at one or a plurality of arc-shaped concave curved surfaces or obtuse angles. It can be formed smoothly by combining the curved surfaces of the two continuous.

  In the bag making and filling cylinder structure in this vertical bag making and filling machine, at least one of the gaps formed between the outer cylinder and the inner cylinder is blown with air or inert gas and air in the bag. It is used as a passage for sucking out and the opening can be sealed with respect to the gap other than the gap used as the passage.

  In the bag making and filling cylinder structure in this vertical bag making and filling machine, air or an inert gas is blown into at least one of the gaps formed between the outer cylinder and the inner cylinder, A gas supply pipe and / or a gas suction pipe for sucking out air is inserted, and an opening other than the openings at both ends of the pipe is provided for the gap portion in which the gas supply pipe and / or the gas suction pipe is inserted. The opening can be sealed with respect to the gap portion other than the gap portion and the gap portion into which the pipe is inserted.

  In the bag making and filling cylinder structure in this vertical bag making filling and packaging machine, a lid is provided to seal the opening that opens at the upper and lower ends of the gap, and the upper lid is made of the product. A fixing part for assembling and fixing the bag filling cylinder to the cylinder making unit can also be used.

  In the bag making and filling cylinder structure in this vertical bag making and filling machine, formation of a square bag having hem seals at the four corners from the belt-like packaging material, charging of the packaged product into the bag, and air or inert gas The present invention can be applied to a vertical bag making filling and packaging machine that manufactures a square bag package with a hem seal by sequentially repeating filling.

  Since this invention is comprised as mentioned above, there exist the following effects. The square cylinder is the outer cylinder, and the four cylinders that are processed into a plurality of continuous bent surfaces that are bent at smooth concave surfaces or obtuse angles are fitted as inner cylinders. Since it is a bag-making and filling cylinder constructed in the form of a heavy cylinder, it is possible to achieve a good hem seal by using a square cylinder on the outside, and a plurality of continuous bent corners with smooth concave curved surfaces or obtuse angles. Good fall characteristics, maintainability and hygiene can be achieved by the inner cylinder processed into a bent surface. Further, even when air or inert gas is filled in the bag, the gap formed when the outer cylinder and the inner cylinder are fitted can be used as the passage of the gas supply pipe. The supply pipe does not adversely affect drop characteristics and hygiene.

It is a perspective view explaining an example of the vertical type bag making filling packaging machine provided with the bag making filling cylinder by this invention. It is a schematic diagram of the outer cylinder of the bag making filling cylinder shown in FIG. It is a schematic diagram of the cylinder inside a bag making filling cylinder shown in FIG. It is a schematic diagram of fitting of the outer cylinder shown in FIG. 2 and the inner cylinder shown in FIG. It is a schematic diagram of the cylinder of the double structure which the inner and outer cylinder shown in FIG. 4 fit. It is a schematic diagram of the cylinder of a double structure in the case of performing blowing of air or gas. It is a schematic diagram which shows the relationship of the attachment plate to a bag making filling cylinder, a cylinder making machine, and a machine body. It is a schematic diagram which shows the state which assembled | attached the bag making filling cylinder shown in FIG. It is a cross-sectional view of the cylinder explaining the double structure cylinder of another example. It is a perspective view explaining the outline | summary of the vertical type bag making filling packaging machine which performs a hem seal using a square bag making filling cylinder.

  Hereinafter, the structure of a bag making and filling cylinder in a vertical bag making and filling packaging machine according to the present invention will be described with reference to the drawings. FIG. 2 is a view showing an outer cylinder 30 of a bag-filling cylinder structure configured in an inner / outer double cylinder type according to the present invention, (a) is a cross-sectional view of the outer cylinder, and (b) is It is a front view (a part of height direction is abbreviate | omitted and described) of an outer cylinder. FIG. 3 is a view showing the inner cylinder 31 of the bag-filling cylinder structure configured as an inner / outer double cylinder type according to the present invention, (a) is a cross-sectional view of the inner cylinder, and (b) is It is a front view of an inner side cylinder. The inner cylinder 31 is obtained by processing the four corners of a rectangular cylinder into an arc shape. The outer cylinder 30 is, for example, a cylinder whose cross section is formed in a rectangular shape by sheet metal processing, and a belt-like packaging material is guided in the vertical direction on the outer side surface and travels. A center seal is applied while the vehicle is running or stopped. The inner cylinder 31 is a rectangular cylinder having a size that can be fitted into the outer cylinder 30, and an article to be packaged that is packaged at the time of bag-filling is loaded therein. The inner cylindrical body 31 is smoothly connected to the inner surface of an adjacent plane by processing the four corners into an arc-shaped concave curved surface, that is, a quarter cylindrical surface, and the inner surface is formed smoothly as a whole. .

  FIG. 4 is a diagram showing that the outer cylindrical body 30 and the inner cylindrical body 31 are fitted. FIG. 5 is a view showing a bag making and filling cylinder 32 configured as an inner / outer double cylinder type in which an outer cylinder 30 and an inner cylinder 31 are fitted, and FIG. 5 (a) shows the inner / outer double cylinder type. The cross-sectional view of the made bag making and filling cylinder, (b) is a front view of the bag making and filling cylinder configured in the inner and outer double cylinder type. The bag making and filling cylinder structure configured as an inner / outer double cylinder type according to the present invention is a vertical bag making and filling machine which hem-seals a bag body and fills the bag body with air or gas as shown in FIG. In the following, the embodiment will be described.

  As shown in FIG. 6, the opening portions on both end surfaces in the longitudinal direction of the bag making and filling cylinder 32 configured as an inner and outer double cylinder are closed by lid members 33 and 34. The lid members 33 and 34 are fixed to both end faces in the longitudinal direction of the bag making and filling cylinder 32 by welding, for example. The lid members 33 and 34 are air holes among the openings 35a to 35d that open above and below the four gaps formed between the outer cylinder 30 and the inner cylinder 31 whose four corners are processed into smooth curved surfaces. Or the opening parts 35b-35d except the opening part 35a corresponding to the space | gap part used as a channel | path which inserts the gas supply pipe 5 which supplies filling gas in a bag are closed. The lid members 33 and 34 do not cover the opening part that leads to the drop passage of the packaged product formed inside the inner cylinder 31, and allows the packaged product to be charged or filled to pass therethrough. .

  The upper end lid member 33 on the upstream side in the dropping direction of the packaged product is attached to the bag making unit 50 that extends around the lid member 33a that is applied to the upstream end portion of the bag making and filling tube 40 and is welded. And a flange 33b. As shown in the figure, the flange 33b is formed with attachment holes 33c into which four fasteners (clamping bolts) are inserted.

  After the upper end cover member 33 and the lower end cover member 34 are fixed to the bag making and filling tube 32 configured as an inner / outer double cylinder type, the fluid supply pipe 4 connected to the air source or the filling gas source at the upstream end portion ( The gas supply pipe 5 to which a hook that can be connected to the gas supply pipe 5 is inserted and fixed to the upper end cover member 33 and the lower end cover member 34 by welding. In order to supply gas into the bag, the lower end of the gas supply pipe 5 opens on the lower surface of the lower end lid member 34 or extends further downward through the lower lid member 34. It is important to perform the fixing work by these welding so that no gap remains between the members. In particular, the lower end cover member 34 can be kept clean so that the powder to be filled and the fragments of the packaged goods rise up and do not enter the openings 35b to 35d. As a result, the bag making and filling cylinder 40 configured as an inner and outer double cylinder that fills the bag body with air or gas is completed.

  Next, as shown in FIG. 7, the bag making and filling cylinder 40 is assembled and fixed to a cylinder making unit 50 configured as follows. The cylinder making unit 50 has two attachment struts 54a and 54b in the vertical direction, the attachment plate 52 to the vertical bag making and filling machine body to which the cylinder making device 6 is fixed, and the attachment plate 53 of the bag making and filling cylinder. It is fixed by assembly. The bag making and filling cylinder 40 is inserted into the cylinder making device 6 as indicated by an arrow through the bag making and filling cylinder insertion hole 53a formed in the attachment plate 53, and the upper end cover member 33 is attached to the attachment hole 33c at the flange 33b. By passing the fixing tool through the mounting hole 53 b formed in the plate 53, the plate 53 is fixed to the mounting plate 53.

  As described above, the bag making and filling cylinder unit 60 with a cylinder making device shown in FIG. FIG. 1 shows a schematic perspective view of a vertical bag making and filling machine using the bag making and filling cylinder unit 60 with the above-mentioned cylinder making device. 1, in order to show the outline of the packaging machine, in the cylinder making unit 50, the attachment plate 52 to the vertical bag making and filling machine body, the attachment plate 53 of the bag making and filling cylinder, both plates 52, The two joining columns 54a and 54b are omitted in the vertical direction for assembling 53.

  As shown in FIG. 1, the present invention can be applied to a vertical bag making and filling machine that hem-seals a bag body and fills the bag body with air or gas, and an embodiment thereof will be described below. In the vertical bag making and filling machine 61, the belt-like packaging material Fw is bent in a curved shape by the cylinder making device 6 and guided around the rectangular tube bag 30 outside the bag making and filling tube 40 and downward. Traveled. The packaging material is fed by a pair of paper feed belts 26 a and 26 b disposed outside the bag making and filling cylinder 40 and sending the packaging material between the bag making and filling cylinder 40 by a frictional force. The center sealer 23 heat seals both side edges of the packaging material Fw to form the cylindrical packaging material Ft. Hem seals 7a to 7d are applied to the tubular packaging material Ft by hem sealers 25a to 25d disposed outside the four corners of the bag making and filling cylinder 40. The square bag is reinforced by the hem seals 7a to 7d, and the shape of the bag is maintained. A product to be packaged is introduced through the inside of the inner cylinder 31 of the bag-filling cylinder 40, and the lower end seal portion 3 is formed by sandwiching the cylindrical packaging material Ft by the end sealer 24 composed of the end sealers 24a and 24b arranged to face each other. By doing so, the bag packaging body 1 with a hem seal in which the packaged goods are housed and filled is manufactured.

  In this embodiment, there is one gas supply pipe, but there are four openings formed between the outer rectangular cylinder 30 and the inner cylinder 31, and therefore a high gas replacement capacity is required. Up to 4 can be added. Further, the insertion into the four openings is not limited to the gas supply pipe, but can be used as a passage for a sample collection suction pipe of an oxygen detector for inspecting the amount of oxygen remaining in the bag, for example.

  In the present embodiment, the air gap formed between the outer rectangular cylinder 30 and the inner cylinder 31 is used as a passage for inserting the gas supply pipe 5 in order to charge air or gas. It is also possible to use the gap as it is as a gas flow path without using the gas supply pipe.

  As described above, the inner and outer rectangular cylinders are shown in a closely fitted state except for the four corners in the cross section. According to this, the inside of the inner cylinder can be made as large as possible, which is advantageous for filling the packaged products. However, as shown in a cross-sectional view in FIG. 9 a), even if there is a gap between the outer cylinder 30 and the inner cylinder 31, the inner cylinder 31 is connected to the outer cylinder 30 via an appropriate spacer 70. Can be supported. In addition, the inner cylinder 31 is a cylinder having a planar inner surface similar to a square cylinder except for the shape of the four corners. Instead, a cross-sectional view is shown in FIGS. 9b) and 9c). As shown, a circular or oval cylindrical body may be used for the entire cylindrical body. Furthermore, in order to keep the inner surface of the inner cylinder 31 clean, an example in which the four corners are smoothly formed in a circular arc shape has been described so as to be easy to clean. As shown in the plan view, a plurality of continuous bent surfaces bent at an obtuse angle (the bent lines are arranged in parallel to the cylinder axis of the inner cylinder 31) may be used. Further, the lower end cover member 34 has an open shape corresponding to the opening of the inner cylinder 31, but an opening / closing mechanism such as a shutter for stopping the lowering of the packaged product is additionally provided. It is clear that it is good.

  The present invention makes it possible to achieve good hem sealing when a hem seal is applied to the four corners of a square bottom gusset bag or six-sided packaging form such as flat, and has good drop characteristics, maintainability and high hygiene. Used as a bag-filling cylinder provided.

1 Package with hem seal
3 Lower end seal 4 Fluid supply pipe connected to air source or filling gas source
5 Gas supply pipe 6 Cylinder
7a-7d hemseal 20 vertical bag filling and packaging machine
22 Bag making and filling cylinder 23 Center sealer
24a, 24b End sealers 25a-25d Hemsila
26a, 26b Paper feed belt 30 Outer cylinder
31 Inner cylinder 32 Bag making and filling cylinder configured as an inner / outer double cylinder
33 Upper end cover material 33a Cover material
33b Flange 33c Mounting hole
34 Lower end cover members 35a to 35d Opening 40 formed between the outer cylinder and the inner cylinder Bag making and filling cylinder 50 configured as an inner and outer double cylinder for performing gas filling 50 Cylinder making unit
52 Mounting Plate for Vertical Bag Making Filling and Packaging Machine 53 Mounting Plate for Bag Making Filling Tube
53a Bag making and filling cylinder insertion hole 53b Mounting hole
54a, 54b Joining strut 60 Bag making and filling cylinder unit with bag making device 61 Gas filling type vertical bag making filling and packaging machine 70a to 70b Spacer FW Band-shaped packaging material
Ft Packaging material molded into a cylinder

Claims (7)

In a vertical bag making and filling and packaging machine that manufactures a rectangular bag package by sequentially repeating the formation of a rectangular bag from a belt-shaped packaging material and the introduction of an article to be packed into the bag,
An outer cylindrical body having a rectangular cross section used to form a cylindrical packaging material while guiding the belt-shaped packaging material in a curved state along the outer peripheral surface; and fitted inside the outer cylindrical body; It is comprised in the double structure which fitted the inner cylinder in which the inner peripheral surface into which the said to-be-packaged item is thrown in was formed smoothly, and is formed between the said outer cylinder and the said inner cylinder. A bag making and filling cylinder structure characterized in that the gap is hermetically sealed at an opening that opens at the upper and lower ends.   The inner peripheral surface of the inner cylindrical body is formed smoothly by combining one or a plurality of arc-shaped concave curved surfaces or a plurality of continuous bent surfaces bent at an obtuse angle. Item 2. A bag making and filling cylinder structure according to Item 1.   The inner cylindrical body is a rectangular cylindrical body whose outer edge is in contact with the inner edge of the outer rectangular cylindrical body, and the inner surfaces of the four corners are bent by one or a plurality of arc-shaped concave curved surfaces or obtuse angles. The bag making and filling cylinder structure according to claim 1, wherein the bag forming and filling cylinder structure is formed smoothly by combining continuous bent surfaces.   At least one of the gaps formed between the outer rectangular cylinder and the inner cylinder is used as a passage for blowing air or inert gas and sucking out air, and is used as the passage. The bag making and filling cylinder structure according to any one of claims 1 to 3, wherein the opening is hermetically sealed with respect to a void other than the void.   A gas supply pipe and / or a gas suction pipe for blowing air or inert gas and sucking air is inserted into at least one of the gaps formed between the outer rectangular cylinder and the inner cylinder. In the gap where the gas supply pipe and / or the gas suction pipe are inserted, the opening other than the opening at both ends of the pipe, and the gap other than the gap where the pipe is inserted The bag making and filling cylinder structure according to any one of claims 1 to 3, wherein the opening is sealed.   A lid member is provided to seal the opening that opens at the upper and lower ends of the gap portion, and the upper lid member also serves as a fixing portion for assembling and fixing the bag making filling cylinder to the bag making unit. The bag making and filling cylinder structure according to any one of claims 1 to 5, wherein:   A vertical type manufacturing a rectangular bag package with a hem seal by sequentially repeating the formation of a rectangular bag with hem seals at the four corners from the belt-shaped packaging material, charging of the package into the bag, and filling with air or inert gas. It is applied to the bag making filling packaging machine, The bag making filling cylinder structure as described in any one of Claims 1-6 characterized by the above-mentioned.