JP5111625B2 - Bag making and packaging machine - Google Patents

Description

  The present invention relates to a bag making and packaging machine, and more particularly to a bag making and packaging machine for producing a bag made of a rectangular tube film.

  Conventionally, foods and many other commodities are often provided to consumers after being packaged in monetary units or weight units. Among these, products such as snack snacks that are particularly light and bulky tend to be produced in large quantities and consumed in large quantities. For this type of product packaging, vertical type bag making and packaging machines are often used, and products that make bags in a form similar to the shape of a pillow called a pillow type account for the majority of products.

  In some cases, paper is used as a packaging material for such packaging, but synthetic resin films are mostly used. Depending on the physical properties of each product, this film may be made of synthetic resin alone or laminated in combination so that the product can be prevented from being deteriorated by the effects of moisture, oxidation, ultraviolet rays, etc. ing. In addition, many multi-colored films are used to attract consumers' attention, and the products and product names are printed with photographs and illustrations, and the items required by the Food Sanitation Law are printed on the film. is doing.

  In addition, what is continuously rolled with a width and pitch corresponding to a product and wound into a roll is used by being set in a bag making and packaging machine.

  Such a pillow type vertical packaging machine is relatively easy to purchase, has a relatively simple structure, is easy to handle, and is considered to have been frequently used.

  However, the bags manufactured in the shape of pillows have a drawback in that the number of boxes is reduced when packed in a cardboard box or the like. In other words, products such as snacks are packed in cardboard boxes and the like in a predetermined quantity and delivered to the dealer. Due to their shape (pillow shape), there is a dead space between the bags when packing (case packing). It will occur. Then, it is necessary to take measures to increase the size of the box or increase the size of the box. The delivery cost of this type of merchandise is often calculated not by weight but by volume, which increases the delivery cost. Also, in the display at the store, the only way to stack the bags or to put them back together is from the back, and handling at the store is troublesome.

  In order to eliminate these disadvantages, bags having several new forms have been proposed and distributed in part, but among them, the form called the “Gazette type” in which the body is a rectangular tube and has a flat bottom. The packaging bag has some improvement results. For this reason, the ratio of gusset-type bags is gradually increasing, but it is still not sufficient. One reason for this is that snack snacks and other products are often low-priced products, and gusset-type bags that require the purchase of new packaging machines or a review of packaging materials are costly. In many cases, it is difficult to adopt. In addition, for the manufacture of gusset-type bags, it is possible to replace the main parts in the existing packaging machine without purchasing a new packaging machine, and to add / incorporate separate parts / devices that form the seals at the upper and lower ends of the packaging bag. However, in that case, the cost of improvement increases, the operation becomes complicated, and the packaging material is reviewed to maintain the assumed shape. difficult.

  On the other hand, the bags shown in Patent Documents 1 and 2 do not require a review of packaging materials, contribute to the reduction of various logistics costs, and have independence of display at stores, and further attention of consumers The degree is expected to increase.

Japanese Patent No. 2937012 (FIG. 28) Registered Utility Model No. 2593457 (FIG. 11)

  However, the bag of the form as shown in Patent Documents 1 and 2 has a considerably complicated bag making process and is difficult. Moreover, it can be said that it is difficult to put it into practical use because the bag-making ability per hour is greatly reduced as compared with the conventional vertical bag-making and packaging machine for producing pillow-type bags.

  An object of the present invention is to provide a bag making and packaging machine capable of manufacturing a bag having a fold or an inclined surface and ensuring a certain degree of bag making capability.

  A bag making and packaging machine according to the present invention is a bag making and packaging machine for producing a bag made of a rectangular tube-shaped film having a fold and an inclined surface, and includes a rectangular tube member, a conveying unit, a sealing unit, And a pressing member. The rectangular tubular member is a member around which a film is wound. A conveyance means conveys the film wound around the rectangular tube-shaped member into the rectangular tube shape along the longitudinal direction of the rectangular tube-shaped member. The sealing means seals the square tube-shaped film in a space downstream of the rectangular tube member in the conveying direction to generate a bag. The pressing member presses against the end of the rectangular tubular member on the downstream side in the conveying direction from above the film and creases the film.

  Moreover, the bag making and packaging machine according to the present invention is provided with gripping and moving means. Further, the sealing means is disposed so as to seal the film in the vicinity of a virtual drooping line on one surface of the rectangular tubular member. The gripping and moving means is disposed on the downstream side in the transport direction of the sealing means, and grips and moves the cylindrical film. In addition, the gripping moving means removes the cylindrical film so that the center of the cylindrical film is in the vicinity of the virtual drooping line on one surface of the square cylindrical member before sealing is performed by the sealing means. Move.

  In the bag making and packaging machine according to the present invention, the sealing means is disposed so as to seal the film in the vicinity of the virtual drooping line on one surface of the rectangular cylindrical member, and the rectangular cylindrical shape is formed before the sealing is performed by the sealing means. The film in the shape of a square tube is moved by the gripping and moving means so that the center of the film is in the vicinity of the virtual drooping line on one surface of the square tube-shaped member. As a result, it becomes possible to easily seal one end of the bag to be manufactured at a position off the center of the bag (square tube-shaped film), and when manufacturing a bag having a fold or an inclined surface. In addition, the bag-making ability can be secured to some extent.

The schematic perspective view of the principal part of the bag making packaging machine which concerns on one Embodiment of this invention. The perspective view of the packaging bag manufactured with a bag making packaging machine. The figure of the side view which shows one process of bag making packaging. The figure of the side view which shows the process following one process of the bag making packaging shown in FIG. VV arrow view of FIG. 1, FIG. The VI-VI arrow line view of FIG. 1, FIG. The VII-VII arrow line view of FIG. 1, FIG. The figure which shows the state in the process of an action progress before the action | operation of a middle folding plate when shape | molding the bottom part of a bag. The side view which shows the dimensional relationship of the packaging bag manufactured with a bag making packaging machine.

  FIG. 1 shows a bag making and packaging machine 1 according to an embodiment of the present invention. The packaging bag B in which the product is manufactured and manufactured by the bag making and packaging machine 1 is displayed and displayed at the store front in the manner shown in FIG.

  When manufacturing the packaging bag B, as will be described later, the display inclined surface 6 which is the upper part at the time of display / display at the store is first formed. During the molding, the back surface 4 of the packaging bag B is positioned on the front side of the bag making and packaging machine 1 (see FIG. 1) due to the structure of the bag making and packaging machine 1. There are side surfaces 5 on the side of the display vertical surface 7 of the packaging bag B that is the side visible to the customer during the exhibition. The display sloping surface 6 of the packaging bag B extends obliquely upward from the upper edge of the display vertical surface 7 to the back surface 4 and is inclined by an inclination angle A1 with respect to the horizontal plane at the time of display (see FIG. 2). In addition, the square annular lower surface 3a of the cylinder 3 of the bag making and packaging machine 1 described later is inclined by the same angle as the inclination angle A1 with respect to the horizontal plane. This square annular lower surface 3a is used as a jig (tool) when the packaging bag B is manufactured.

  Further, the packaging bag B is manufactured so that the bottom portion is substantially flat so that the packaging bag B is self-supporting when displayed and displayed at a store.

<Configuration of bag making and packaging machine>
As shown in FIG. 1, the bag making and packaging machine 1 includes a mechanism for holding and rotating the film roll FR, a tension adjusting mechanism 50 for adjusting the tension of the film F fed out therefrom, and a sheet-like film F in a rectangular tube shape. The former 8 and the cylinder 3 for deforming into a rectangular shape, the vertical heater 14 for vertically sealing the overlapping portion of the film F in the shape of a rectangular tube, the square heater 30, the pair of pull-down belts 33, and the rectangular tube-shaped film F A horizontal heater 19 that closes the upper and lower ends of the packaging bag B by sealing horizontally, and a bag top / bottom forming mechanism for forming the upper and bottom portions of the packaging bag B are configured.

(Detailed configuration of tension adjustment mechanism)
The tension adjusting mechanism 50 includes a pair of driving rollers 50a, a pressing roller 50b, a step roller 50c, and the like.

(Detailed configuration of cylinder and former)
The cylinder 3 is a rectangular tube-shaped member, and an upper portion is a hopper 26. A product P such as potato chips weighed to a predetermined amount is fed into the hopper 26 from a combination weighing device or the like provided above the bag making and packaging machine 1.

  The portion below the hopper 26 of the cylinder 3 has a front side surface 3b, a back side surface 3d, both side surfaces 3c, and a square annular lower surface 3a, and is formed into a rectangular tube shape from a lower opening surrounded by the square annular lower surface 3a. The product P is introduced into the film F. The front side surface 3b and the back side surface 3d are parallel to each other, and these surfaces 3b, 3d and both side surfaces 3c are orthogonal to each other. Around the lower opening (rectangular opening) of the cylinder 3 is a square annular lower surface 3a, which is inclined by the inclination angle A1 (see FIG. 2) with respect to the horizontal plane as described above.

  Moreover, the cylinder 3 has the pressure receiving plate 9 extended below from the lower end of the back side surface 3d, as shown in FIG. The pressure receiving plate 9 is a member used when the display sloping surface 6 of the packaging bag B is formed, and is otherwise in a state of hanging from the lower end of the back side surface 3d. When the display inclined surface 6 of the packaging bag B is formed, it swings as shown in FIG. 4 with the vicinity of the lower end of the rear side surface 3d as a fulcrum, contacts the square annular lower surface 3a via the film F, and the square annular lower surface 3a. It will be in the state of inclination along.

  The former 8 is arranged so as to surround the cylinder 3. The shape of the former 8 is such that the sheet-like film F sent from the film roll FR is formed into a rectangular tube shape when passing between the former 8 and the cylinder 3.

(Detailed configuration of vertical heater)
The vertical heater 14 forms an overlapping portion of the film F wound around the cylinder 3 (an overlapping portion on both sides of the film F with respect to the feeding direction of the film F) with a constant pressure, on the front side surface 3b of the cylinder 3. Heat while pressing against and seal vertically. The vertical heater 14 includes a heater block incorporating a heater and an actuator (not shown) that moves the heater block toward the front side and the back side. A portion that is vertically sealed by the vertical heater 14 becomes a vertical seal portion 41 (see FIGS. 1 and 2).

(Detailed configuration of pull-down belt)
A pair of pull-down belts 33 arranged on both the left and right sides are provided for sucking and transporting the film F wound around the cylinder 3 downward, and are composed of a driving roller, a driven roller, a belt having a sucking function, and the like. ing. In addition, in the bag making packaging machine 1 which concerns on this embodiment, manufacture is made batch-wise and conveyance of the rectangular tube-shaped film F by the pull-down belt 33 is also performed intermittently.

(Detailed configuration of square heater)
The square heater 30 is disposed above the pull-down belt 33, presses the heating body from the outside against the four corners of the cylinder 3, and sandwiches the film F with the cylinder 3, as shown in FIG. A crease is put on a portion that becomes a corner of the side when the packaging bag B is formed. Unlike the vertical heater 14 and the horizontal heater 19, the square heater 30 forms a ridge line that contacts each surface in a short time within a range in which the film F is not thermally deformed by heating.

(Detailed configuration of horizontal heater)
A pair of horizontal heaters 19 arranged on the front side and the back side are positioned below the pull-down belt 33, and when the rectangular tube-shaped film F is sealed horizontally, the film F is sandwiched between each other as shown in FIG. Pressed together.

  In addition, a cutter 20 is incorporated in one side heater 19. The cutter 20 cuts the horizontal seal portion of the film F up and down.

(Detailed configuration of bag top bottom molding mechanism)
In the bag making and packaging machine 1, when the rectangular tube-shaped film F is horizontally sealed by the lateral heater 19, that is, when the upper and lower ends of the packaging bag B are heat sealed, the display of the packaging bag B is performed by the bag top bottom forming mechanism. Molding of the inclined surface 6 and molding with the bottom portion being substantially flat are performed.

  The bag top bottom portion forming mechanism includes a pressure receiving plate 9 that hangs from the lower end of the back side surface 3d of the cylinder 3, and includes a tilted in-plane folding plate 10, a pressing plate 11, a misalignment preventing first press plate 13, and a misalignment preventing second press contact. A plate 18, a fold folding plate 17, a flat plate 27, a gusset forming plate 28, a catcher 23, and the like are provided.

  The pair of left and right inclined in-plane folding plates 10 shown in FIGS. 1 and 6 enter the space near the lower side of the rectangular annular lower surface 3 a of the cylinder 3 when the display inclined surface 6 of the packaging bag B is formed. The inclined in-plane folding plate 10 is a triangular plate member having the tip on the cylinder 3 side as an apex, and is inclined by an inclination angle A1 with respect to the horizontal plane in a side view, similarly to the rectangular annular lower surface 3a of the cylinder 3. Yes.

  When the display inclined surface 6 of the packaging bag B is formed, the pressing plate 11 presses against the rectangular annular lower surface 3 a of the cylinder 3 from the back side (see FIGS. 1 and 3) of the film F that becomes the packaging bag B. At this time, as shown in FIG. 4, the pressure receiving plate 9 is pushed and pressed against the square annular lower surface 3a from below. Accordingly, the film F is sandwiched between the pressure receiving plate 9 and the pressing plate 11 that are pressed against the square annular lower surface 3 a of the cylinder 3. On the other hand, in other cases, the pressing plate 11 comes out of the space below the cylinder 3 and retracts to the back side to return to the home position (see FIG. 3).

  The fold folding plate 17 enters between the pressing plate 11 and the square annular lower surface 3 a immediately before the film F is sandwiched between the pressure receiving plate 9 and the pressing plate 11. Thereby, as shown in FIG. 4, the fold 16 is formed in the film F that becomes the packaging bag B.

  The first misalignment-preventing first pressure contact plate 13 is usually located on the back side of the cylinder 3 and presses the film F against the back side surface 3d of the cylinder 3 with a predetermined force before the pressing plate 11 starts to move. Thus, when the film F is sandwiched between the pressure receiving plate 9 and the pressing plate 11, the lower edge 3d of the cylinder 3 has a boundary between the display vertical surface 7 and the vertical inclined surface 6 shown in FIG. A fold can be attached to the film F portion. Further, by pressing the displacement-preventing first pressure contact plate 13 against the back side surface 3d of the cylinder 3, it is possible to prevent the film F from being displaced when the display inclined surface 6 of the packaging bag B is formed.

  The misalignment-preventing second press-contacting plate 18 is normally positioned on the front side of the cylinder 3, and at the same timing as the misalignment-preventing first press-contacting plate 13, the film F is applied to the front side surface 3b of the cylinder 3 with a predetermined force. Press. This timing is also before the operation timing of the fold plate 17.

  The fold folding plate 17 is a member for forming the fold 16 of the packaging bag B shown in FIGS. 4 and 9 as described above. This pleat 16 is necessary for the following reason.

  As shown in FIG. 9, the display inclined surface 6 of the packaging bag B is not a left-right object in a side view, one side orthogonal to the length L1 (corresponding to the bag width), and the other side orthogonal to the length L2 It is the hypotenuse in the right triangle. The length L5 in FIG. 9 is the length in the height direction of the lateral seal portion (hereinafter referred to as the top seal portion) 15 at the top of the packaging bag B. The length L3 in FIG. 9, which is the length of the display inclined surface 6 in a side view, is inevitably longer than the length L2, and the following equation is satisfied in order to form the display inclined surface 6 neatly: It is necessary to form the fold 16 (length L4) by the fold folding plate 17.

L3 + L5 = L2 + L4 + L4 + L5
By forming the folds 16 in this way, it is possible to suppress the occurrence of excessive wrinkles on the display inclined surface 6 or in the vicinity thereof.

  In order to form such a fold 16, the fold folding plate 17 is arranged so as to move downward from the front side of the front side surface 3 b of the cylinder 3.

  The pair of flat plates 27 are disposed on the front side and the back side of the cylinder 3 and horizontally move into the space below the lateral heater 19 when the bottom surface 2 of the packaging bag B is formed by an actuator (not shown). The flat plate 27 is in a horizontal state before and after movement (see FIGS. 3 and 4).

  The pair of gusset forming plates 28 are triangular plate members having the tip on the cylinder 3 side as a vertex, and when forming the bottom surface 2 of the packaging bag B, the film enters the space below the lateral heater 19 from both the left and right sides. Press F inward.

  The catcher 23 is a holding container whose upper surface is open, which can receive the upside down packaging bag B of FIG. The cross section seen from the side of the catcher 23 is the shape shown in FIG. 3 and FIG. The catcher 23 is configured to be driven by an actuator (not shown) so that the cylinder 3 can move between the position shown in FIG. 3 and the position shown in FIG. 4. Specifically, from the position shown in FIG. 3 to the position shown in FIG. 4, the catcher 23 moves obliquely upward on the near side and returns to the lower side on the contrary.

<Operation of lateral heater and operation of bag top bottom forming mechanism in bag making and packaging machine>
In the first packaging cycle, the upper part of the packaging bag B is formed on the upper side at the time of display and the top seal part 15 is generated as a horizontal seal part. In the next packaging cycle, an article to be packaged is charged and filled. In this state, the bottom surface 2 which is the lower side during the exhibition is formed and the bottom seal portion 21 is generated as a horizontal seal portion. As shown in FIG. 4, the bottom seal portion 21 of the preceding packaging bag B and the top seal portion 15 of the subsequent packaging bag B are simultaneously formed as a transverse seal portion by a transverse sealing operation by the transverse heater 19 once. Both 21 and 15 are separated by a cutter 20.

  As shown in FIG. 4, the point of this horizontal seal and the point of separation are substantially on the drooping line on the front side surface 3 b of the cylinder 3, and from the preceding packaging bag B, the center position before and after the bag, and the subsequent packaging bag B , It is at a position that becomes the back surface 4 of the bag.

  FIG. 3 shows that the display inclined surface 6 and the top seal portion 15 that can be seen by the customer during the display at the store are already formed in the preceding packaging bag B, and the product (packaged goods) P is put into the packaging bag B. Immediately before filling, and the film F is sent downward by the pitch of one bag for forming the display inclined surface 6 of the next packaging bag B, and the forming operation of the display inclined surface 6 of the next packaging bag B is started. Shows the state.

  FIG. 4 is a diagram illustrating a state in which the bottom seal portion 21 of the preceding packaging bag B and the top seal portion 15 of the subsequent packaging bag B are simultaneously laterally sealed by the lateral heater 19. The preceding packaging bag B into which the product P has been put is held at the lower position of the cylinder 3 by the catcher 23 as shown in FIG. 3, and then is moved sideways as shown in FIG. It is moved to the viewing position. The movement of the catcher 23 is controlled by a control device (not shown) with other parts of the bag top bottom forming mechanism (inclined in-plane folding plate 10, pressing plate 11, displacement-preventing first press plate 13, position-shift preventing second press plate 18. The fold plate 17, the flat plate 27, and the gusset forming plate 28) are interlocked with the movements.

  That is, the present bag making and packaging machine 1 is a method of forming the display inclined surface 6 of the packaging bag B using the square annular lower surface 3a of the cylinder 3 as a jig, so that the horizontal sealing process is performed in the hanging space on the front side surface 3b of the cylinder 3. It is essential to do it. Therefore, the packaging bag B that has been previously molded and the product P has been inserted is held by the catcher 23 as shown in FIG. 4 and the pressing plate 11 is pressed against the square annular lower surface 3a of the cylinder 3. The catcher 23 is moved obliquely upward toward the front side at the timing when the display inclined surface 6 of the packaging bag B is formed.

  The operation of the pressing plate 11 is as described above, and the display inclined surface 6 of the packaging bag B is sandwiched between the pressure receiving plate 9 and the pressing plate 11 pressed so as to stick to the rectangular annular lower surface 3a of the cylinder 3. Molded. Various conditions for molding the display inclined surface 6 of the packaging bag B are such that the film F to be used is bent, folded and stretched so that the desired shape is maintained even when the packaging bag B is displayed at the store. Etc., and the shape and specific gravity of the product are taken into consideration.

  Further, at the start of the manufacturing operation of the packaging bag B, the pressing plate 11 is operated and the fold folding plate 17 is operated. The fold folding plate 17 swings and moves deeper than the front side surface 3b of the cylinder 3 to form the folding fold 16, and immediately returns to the original position (position shown in FIG. 4).

  The inclined in-plane folding plates 10 provided on the left and right sides of the cylinder 3 also move toward the center of the cylinder 3 as the pressing plate 11 starts operating. At this time, the in-plane folding plate 10 enters a predetermined position and then returns to the original position. After that, the pressure receiving plate 9 is pushed by the pressing plate 11 to cover the rectangular annular lower surface 3a of the cylinder 3, and the film F is folded into a predetermined mountain fold and valley inside the display inclined surface 6 as shown in FIG. Generate the state of

  On the other hand, when the horizontal seal is made, the bottom surface 2 of the packaging bag B (bag held by the catcher 23) preceding the packaging inclined surface 6 is molded together with the molding of the display inclined surface 6 of the packaging bag B.

  The catcher 23 plays an important role in the formation of the display inclined surface 6 and the bottom surface 2.

  When the reference position for forming the display inclined surface 6 is a position where the portion that becomes the display vertical surface 7 of the packaging bag B and the portion that becomes the display inclined surface 6 contact each other, the downstream end of the packaging bag B filled with the product P is reached. There are a plurality of height levels H1 to H5 shown in FIG.

  The portion of the film F at the levels H1 to H2 is a portion that becomes the display inclined surface 6, the portion of the film F at the level H2 to H3 is a portion that becomes the top seal portion 15, and the portion of the film F at the levels H3 to H4 is It is a portion that becomes the bottom seal portion 21, and a portion of the film F at the levels H <b> 4 to H <b> 5 is a portion that becomes the bottom surface 2. The lengths of levels H <b> 1 to H <b> 5 that are the total of the respective lengths are the lengths of the film F necessary for forming the display inclined surface 6, the top seal portion 15, the bottom seal portion 21, and the bottom surface 2. Here, since the preceding packaging bag B storing the product P is in a suspended state due to the weight of the product P, the preceding packaging bag B is moved to a desired position using the catcher 23 as shown in FIG. It is necessary to let If there is nothing that can move the packaging bag B while maintaining the outer shape of the preceding packaging bag B, such as the catcher 23, the shape of the preceding packaging bag B may change during the movement. There is a possibility that the molding of the bottom surface 2 is adversely affected and the final shape of the manufactured packaging bag B is distorted.

  For this reason, the bag making and packaging machine 1 is provided with the catcher 23 although the structure is slightly complicated.

  In addition, regarding the movement of the catcher 23, the physical property of the film F etc. are also considered.

  Further, in forming the bottom surface 2, the flat plate 27 and the gusset forming plate 28 operate. The pair of flat plates 27 enter the gap in the vertical direction between the upper end of the catcher 23 and the lower end of the horizontal heater 19 from the front side and the rear side, and at a position near the lower side of the horizontal heater 19 that does not hinder the operation of the horizontal seal. The film F is sandwiched. Immediately before the operation of the flat plate 27 and the raising operation of the catcher 23, the gusset forming plate 28 pushes the film F into the rectangular tube-shaped film F from the apex of the front end thereof by a predetermined distance. Further, when the gusset forming plate 28 is operated, the folding plate 32 shown in FIG. 1 pushes the square tube-shaped film F inward slightly (see FIG. 8). The pair of left and right half-fold plates 32 are plate members along the vertical plane and correspond to the center of the rectangular tube-shaped film F in the left-right width direction. At a position higher than the height level at which the middle folding plate 32 operates, the top seal portion 15 of the subsequent packaging bag is folded together with the display inclined surface 6, and the middle folding plate 32 contains the product P. The bottom seal portion 21 on the bottom surface of the packaging bag (see the lower bag in FIG. 4) serves as a supplementary function so that the bottom surface is centered in the front-back direction and the shape of the bottom surface is adjusted.

  A horizontal seal portion is formed by the horizontal heater 19 and the bottom seal portion 21 of the preceding packaging bag B is formed by the cutter 20 separating the middle of the horizontal seal portion, and then the bottom plate 21 and the gusset forming plate 28 The seal portion 21 is tilted so as to be as close as possible to the bottom surface 2. More specifically, the pair of flat plates 27 that are in a state of sandwiching a portion slightly below the horizontal seal portion at the time of the horizontal seal operation are slightly spaced after the operation of the cutter 20. Then, in a state where the bottom surface 2 is supported by the gusset forming plate 28, the pair of flat plates 27 slide to the back side while maintaining a mutual distance. Thereby, the bottom seal portion 21 is tilted so as to be in close contact with the bottom surface 2, and as shown in FIG. 2, the packaging bag B is self-supporting, and even if the packaging bag B is tilted, the bottom seal portion 21 is tilted backward. And the bottom part of the packaging bag B which consists of a bottom face 2 is formed.

  Thereafter, the flat plate 27, the gusset forming plate 28, and the catcher 23 are separated from the packaging bag B, and the packaging bag B is released. The packaging bag B discharged downward is sent to a downstream process such as corrugated cardboard packing by the conveyor 29 shown in FIG. The catcher 23 returns to the position shown in FIG. 3 and holds the next packaging bag B.

  By repeating the above intermittent movement, the product packaging operation is continuously performed.

<Other configurations>
(A)
In order to make the corners of each side sharper and to further shape the shape of the packaging bag B, a pair of upper and lower plates engraved with a mountain fold line and a valley fold line are provided before the former 8 is formed into a square tube shape. Is possible. If the ridge line portion of the film F that becomes the corner of the packaging bag B is sandwiched between these plates before forming the square tube, the corner becomes sharper when the packaging bag B is obtained.

(B)
Depending on the physical properties of the film F, the folding folds 16 on the back surface 4 produced during the manufacture of the packaging bag B may not be maintained until the display at the store. In view of the physical properties of the film F, when it is necessary to increase the close contact degree of the folding fold 16 by further means, when the packaging bag B is held by the catcher 23 as shown in FIG. It is preferable that an adhesive means (using a paste) such as hot melt is inserted into the base of the fold 16 from the opening 31 and adhered. Thereby, stability of the shape of packaging bag B can be improved more.

(C)
In the bag making and packaging machine 1, the display inclined surface 6 is formed using the square annular lower surface 3a of the cylinder 3 as a jig, and the bottom portion of the preceding packaging bag B is formed. Then, for forming the next packaging bag B, the film F is then sent downward by one bag, but the positioning is important.

  In view of this, in the bag making and packaging machine 1, it is desirable to detect the registration mark Fm (see FIG. 1) of the film F by the high-precision reading sensor 25.

<Main features of bag making and packaging machine>
According to said bag making packaging machine 1, as shown in FIG. 2, although the overlap part of a mountain fold or a valley fold is made, the display inclined surface 6, the display vertical surface 7, and the side surface which are the surrounding main surfaces 5, the bottom part which consists of the back surface 4, the bottom face 2, and the bottom seal | sticker part 21 can be made into a substantially plane. As a result, the packaging bag B can be self-supporting as shown in FIG. 2, and a large number of packaging bags B can be placed in a limited volume during conveyance by a cardboard box or the like.

  In addition, the shape of the packaging bag B above is unique, contributing to downsizing of delivery containers (such as cardboard boxes) and logistics costs, and facilitating display and display at retail stores. There is also an effect of increasing. According to the present invention, such a packaging bag B does not depend on a new dedicated packaging machine, and is a major part of a vertical type bag making and packaging machine that has been frequently used and has high technical perfection and reliability. It can be manufactured by the bag making and packaging machine 1 in which a part is remodeled without adding a hand and a new part is added or incorporated.

  In the above embodiment, the present invention is applied to a vertical bag making and packaging machine, but the present invention can also be applied to a horizontal packaging machine.

2 Bottom 3 Cylinder (Rectangular member)
3a Square annular bottom surface of the cylinder 3b Front side surface of the cylinder (one surface of the square cylindrical member)
3d Back side of cylinder 6 Display inclined surface of packaging bag (inclined surface of bag)
9 Pressure receiving plate (auxiliary member)
10 In-plane folding plate (folding member)
11 Pressing plate (pressing member)
14 Vertical heater 15 Top seal part of packaging bag 17 Wrinkle folding plate (folding member)
19 Horizontal heater (sealing means)
20 Cutter (cutting means)
21 Bottom seal part of packaging bag 23 Catcher (gripping and moving member)
27 Flat plate (first member)
28 Gazette forming plate (second member)
33 Pull-down belt (conveying means)

Claims (3)

A bag making and packaging machine for producing a bag made of a rectangular tube-shaped film in which a fold and an inclined surface are formed,
A square tubular member around which a film is wound,
Conveying means for conveying the film that is wound around the rectangular tube-shaped member into a cylindrical shape along the longitudinal direction of the rectangular tube-shaped member;
In a space on the downstream side in the conveyance direction of the rectangular tubular member, sealing means for producing a bag by sealing the tubular film;
A pressing member that presses against the end of the rectangular tubular member on the downstream side in the conveying direction from above the film and creases the film;
A gripping moving means disposed on the downstream side of the sealing means in the transport direction and gripping and moving the cylindrical film;
With
The sealing means is disposed so as to seal the film in the vicinity of a virtual drooping line on one surface of the rectangular tubular member,
The gripping movement means moves the cylindrical film so that the center of the cylindrical film is in the vicinity of the virtual droop line before the sealing is performed by the sealing means.
Bag making and packaging machine. The rectangular tubular member extends in the vertical direction, and the lower end thereof is inclined with respect to the vertical plane.
The inclined surface of the bag made of the film is formed by pressing the pressing member against the lower end of the rectangular tubular member inclined with respect to the vertical surface from above the film.
The bag making and packaging machine according to claim 1. An auxiliary member hangs down from a part of the end portion on the downstream side in the transport direction of the rectangular tubular member,
When the pressing member presses against the end of the rectangular tube-shaped member on the downstream side in the conveyance direction from above the film, the auxiliary member swings to the end of the rectangular tube-shaped member on the downstream side in the conveyance direction. In contact, the film is sandwiched between the pressing member and the auxiliary member,
The bag making and packaging machine according to claim 1.

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