JP4486459B2 - Packaging material supply device in packaging equipment - Google Patents

Description

  The present invention is applicable to a packaging device such as a vertical bag making filling packaging device, and more particularly to a packaging material supply device capable of handling high-speed packaging.

  2. Description of the Related Art Conventionally, a vertical bag making filling and packaging apparatus is well known as a type of packaging apparatus that fills and packs a product in a bag while forming a bag from a packaging material. The vertical bag-making filling and packaging apparatus forms a cylindrical packaging film from a web-shaped packaging film by a former called a former, and forms a packaging bag from the cylindrical packaging film that runs on the outer peripheral surface of the filling cylinder. The product is put into the filling cylinder, and the cylindrical packaging film is sealed in the horizontal direction to seal the top of the packaging bag in which the product has been placed and the bottom of the next packaging bag to enter the product. Is a device that continuously manufactures bags and wrapping products, and is particularly suitable for continuous packaging of small rose articles, such as individually packaged small foods such as candy, candy, chocolate, and cookies. Yes.

  In the vertical bag making filling and packaging apparatus, in order to enable continuous packaging, the web-shaped packaging material wound around the roll is fed out by an appropriate feeding apparatus and supplied to the former by a paper feeding apparatus. A weight roll that is movable in the vertical direction is hung on the web-shaped packaging material fed from the roll by fitting the rotary shaft of the roll into the left and right vertical guide grooves. The web-shaped packaging material is pushed down by the weight of the weight roll, and the tension of the web-shaped packaging material is secured so that the web-shaped packaging material is not loosened while absorbing the fluctuation of the web-shaped packaging material. In addition, the tension lever on which the force of the spring acts can be swung up and down and the weight of the tension lever and the tension roller can be obtained by hanging a plurality of rotatable tension rollers pivotally supported by the tension lever on the web-shaped packaging material. In addition, tension is applied by the force of a spring. By detecting the swinging of the tension lever accompanying the intermittent supply of the web-shaped packaging material with a detector and controlling the operation of the feeding device, the web is always tensioned while reducing the web pulling force.

  Since the tension lever swings at a speed corresponding to the web pulling speed, especially when the web is intermittently pulled out at a high speed, the inertia works due to the weight of the tension lever and tension roller when the tension lever swings, and the angle exceeds the required angle. And a follow-up delay occurs with respect to the web pulled out. In addition, since the web is stretched over a plurality of tension levers and guide rollers that are driven together with the drawer, the web is unnecessarily large due to the rotational inertia of these many driven rollers, especially when the web is intermittently pulled out at high speed. The phenomenon of being pulled out and returning occurs. As a result, there is a timing at which no tension is applied to the web, so that the web is easily loosened, the web is displaced in the width direction perpendicular to the pulling direction, or registration marks are added to the web at regular intervals. There is a problem that positioning accuracy is lowered when the web pattern is aligned by positioning based on the mark.

An intake chamber having one end surface opened and a suction port opened at the other end surface is disposed downstream of the drawing portion in the drawing direction, and a web is fitted in a U-shape from the intake chamber opening. Inclined portions that gradually protrude into the intake chamber as it goes downstream in the drawing direction are formed on a pair of side surfaces that face in a direction orthogonal to the drawing direction of each of these, and the inner width dimension on the downstream side of these inclined portions is defined as the web. A web supply apparatus is provided which is formed to be substantially the same as the width dimension of the web and is provided with a detector for detecting the insertion position of the U-shaped web on the side surface extending from the opening to the suction port and controlling the operation of the feeding portion. (Patent Document 1). By sucking in from the suction port and sucking the web inwardly into the U-shape with the negative pressure, tension is applied to the web and the displacement in the width direction of the web drawn from the web roll is corrected by intermittent drawing. Then, by positioning in the width direction and detecting with the detector that the insertion depth of the U-shaped web has become shallow, the web is fed out by starting the operation of the feeding section, and the insertion depth of the U-shaped web Is kept constant. Since no tension lever or tension roller is used, the problems caused by them are solved. Further, since there is no portion where the web is extremely bent by a large number of driven rollers, even when the web material is stiff and hard, uniform tension is applied to the entire web.
Japanese Patent No. 2903396 (column 4, line 10 to column 4, line 33, FIGS. 1 and 2)

In the packaging material supply device that is provided on the upstream side of the feeding means that intermittently feeds the packaging material to the packaging device main body and supplies the packaging material to the feeding means, the preliminary feeding roller that feeds the packaging material from the supply source, and the preliminary feeding roller A storage device such as a suction chamber for storing the packaging material fed by the preliminary feeding roller, and a sensor device for detecting in stages the amount of the packaging material stored in the storage device. A packaging material supply apparatus has been proposed that includes a control means for controlling the speed of the preliminary feeding by the preliminary feeding motor based on the storage amount of the packaging material detected stepwise by the sensor means (Patent Document 2). By detecting the amount of the packaging material stored in the storage means stepwise by the sensor means, it is possible to recognize in stages the excess or deficiency with respect to the appropriate amount of packaging material stored. In accordance with the excess or deficiency, the control means shifts the speed of the preliminary feeding by the preliminary feeding motor to achieve continuous driving of the preliminary feeding roller.
JP 2000-53292 A (paragraphs [0019] to [0023], FIG. 1)

  In supplying a conventional web-shaped packaging material to a packaging device that intermittently operates, the web-shaped packaging material must be intermittently operated in accordance with the operation of the packaging device. When the operation of the packaging device is accelerated in the intermittent operation state, the vertical movement of the packaging device becomes intense when the weight roller is provided. When the vertical movement of the weight roller and the intermittent feeding of the packaging material are synchronized, a kind of resonance occurs, the weight roller flutters, the web-shaped packaging material does not feed smoothly, and the operation of the packaging device can be stopped. It must be. In order to avoid stopping the operation of the packaging device, it is necessary to limit the operation speed of the packaging device. As a result, the packaging speed is limited by the limit of feeding of the web-like packaging material, and the capacity of the packaging device is sufficient. There is a problem that it cannot be pulled out. Further, in the bag making and filling and packaging apparatus having the former for forming the web-like packaging material, the web-like packaging material is caused by a slight advance due to its inertia when the intermittent feeding of the web-like packaging material is stopped and the tension disappears. Is loosened and floats up from the former (see the web-shaped packaging material Fw ′ indicated by the imaginary line in FIG. 4). When intermittent feeding is resumed in this state, the loose web-shaped packaging material is suddenly pulled and strongly hits the edge of the former, and the packaging material may be damaged. This phenomenon is particularly likely to occur with aluminum vapor deposited films and aluminum-based packaging materials. No solution has been proposed to eliminate this scratch.

  On the other hand, in the packaging material supply apparatus provided with the suction chamber and the suction chamber, the packaging material inserted in the U-shape is only sucked in the suction chamber and the suction chamber, so that the packaging material is in the lower part and the upper part. In this case, the resistance when the packaging material travels along the inner walls of the suction chamber and the suction chamber is different, and the tension acting on the film (packaging material) must be changed. Similarly, it is not possible to sufficiently cope with an increase in packaging speed, and a periodic change or flickering of tension may occur.

  Therefore, in the packaging device, when the continuously fed packaging material is supplied to the intermittently operating packaging device, it is possible to absorb the difference between the continuous feeding and the intermittent feeding and eliminate the fluctuation of the running resistance with respect to the packaging material. There is a problem to be solved in that it makes it possible to obtain a tension of a certain value.

  An object of the present invention is a packaging material supply device applied to a packaging device for packaging a product with a web-shaped packaging material, which can store a continuously fed packaging material in a storage portion that sends out the intermittently fed material, and at a high speed It is to provide a supply device which can be adjusted including the case where the packaging material is kept in a constant tension and the packaging is accurately performed even when packaging is performed.

  In order to solve the above problems, a packaging material supply device in a packaging device according to the present invention is provided in a continuous feeding means for continuously feeding a web-shaped packaging material, and the packaging device, and the web-shaped packaging material is supplied to the packaging device. Intermittent feeding means that travels intermittently according to the packaging operation, and storage means that is disposed downstream of the continuous feeding means and in the middle of the packaging device and that can absorb the difference in feeding amount by the both feeding means. And a suction means for providing a running resistance to the web-shaped packaging material by providing a suction surface to the web-shaped packaging material on the outlet side of the storage means.

  According to the packaging material supply device in this packaging device, the web-shaped packaging material is continuously fed by the continuous feeding means, while the intermittent feeding means arranged in the packaging device wraps the web-shaped packaging material in the packaging device. Drive intermittently according to the operation. Therefore, the storage means arranged on the downstream side of the continuous feeding means and on the way to the packaging device absorbs the difference in the feeding amount of the web-shaped packaging material by both feeding means. Since the suction means with the suction surface applied to the web-shaped packaging material is disposed on the outlet side of the storage means, the web-shaped packaging material traveling toward the packaging device has a region where the suction means is provided. Running resistance is given according to the pressure difference when passing. As a result, an appropriate tension is applied to the web-shaped packaging material without providing a weight roll or a tension roll. Conditions such as the area of the suction surface and the suction pressure are maintained once the packaging conditions are determined, so that the running resistance is maintained constant without depending on fluctuations in the amount of web-like packaging material stored in the storage means. The tension acting on the web-shaped packaging material can also be kept constant.

In the packaging material supplying device in the packaging device, said storage means comprises two guide plates which face each other, the web-like packaging material which is continuously transmitted by the continuous feeding means, the two in the guide plates, that it has a structure that forms a reservoir having a traveling portion along each of the respective guide plates before and after the inversion unit. Since the storage means is composed of two guide plates arranged opposite to each other, the travel of the web-shaped packaging material can be restricted while having a very simple structure.

In the packaging material supplying device in the packaging device, wherein the two guide plates, air blowing device to blow air towards and the reversing portion between the two traveling part is arranged. The air blowing tool is composed of a pipe formed with a plurality of blowing ports extending in the width direction of the web-shaped packaging material and opening downward. By blowing air from the air blowing tool toward the reversal part, the web-like packaging material is given tension, and it is possible to prevent the occurrence of slack and deviation that cause unnecessary or causes wrinkles or running defects. .

In the packaging material supply apparatus in a packaging apparatus including an air spraying tool, the guide plate is arranged vertically with the web-shaped packaging material entering and exiting from above and the reversing portion placed on the lower side, and the air spraying tool Is arranged between the upper ends of the guide plates, and is arranged to blow out air downward. Although the web-like packaging material is lightweight per unit amount, it is affected by gravity, and therefore the guide plates are arranged so as to hang down between the guide plates. Moreover, it becomes natural arrangement | positioning that the blowing direction of an air blowing tool is sprayed toward the inversion part located in the bottom side of the web-shaped packaging material which hung down, and a web-shaped packaging material can be stored stably. Since the blown air flows out smoothly from the left and right openings between the guide plates, a stable tension is given to the web-shaped packaging material.

In the packaging material supply apparatus in a packaging apparatus provided with an air spraying tool, it is preferable that the air spraying tool has a slow power removal function for removing static electricity charged on the web-shaped packaging material. The web-shaped packaging material has a property that static electricity is easily charged, and the charged web-shaped packaging material adheres to the packaging materials or other devices and easily causes troubles. Therefore, the web-like packaging material can be stably supplied by removing static electricity from the web-like packaging material by providing the slow power function.

In the packaging material supply apparatus having a storing means having two guide plates, the guide plate forms an optical path, and the guide plate has the web-shaped package existing in the optical path passing through the optical path. Sensors for detecting the material are arranged vertically, and the feeding speed of the web-shaped packaging material by the continuous feeding means is controlled in accordance with the position of the reversing part detected by the sensor. The length of the web-shaped packaging material stored in the storage means is calculated by detecting the position of the inverted portion of the web-shaped packaging material by a sensor provided on the guide plate. By controlling the feeding speed of the web-shaped packaging material by the continuous feeding means based on the calculated length, the length of the web-shaped packaging material stored in the storage means can be quickly controlled to the target length. .

  In the packaging material supply apparatus in this packaging apparatus, the suction means can be a fan with the suction surface side facing the web-shaped packaging material. By applying the suction surface that sucks in air when the fan rotates to the web-like packaging material, negative pressure is applied to the web-like packaging material, and the outside air pressure is applied to the opposite side. Sometimes there is a pressure difference that causes running resistance. On the other hand, the suction means may be a duct connected to a suction source and having the suction surface side directed to the web-shaped packaging material. By introducing a duct from a suction source such as a suction pump to the storage means, as in the case of a fan, the web-like packaging material against which the suction surface of the duct hits is placed between the outside air pressure acting on the opposite side. A pressure difference occurs. Due to the running resistance, tension is applied to the web-shaped packaging material toward the packaging device. The pressure on the suction surface is appropriately set according to characteristics such as the material and thickness of the web-shaped packaging material.

  In the packaging material supply apparatus in the packaging apparatus, the continuous feeding means may be a feeding roller that is driven by a driving means and that feeds the web-shaped packaging material from the web-shaped packaging material accumulation unit. The web-shaped packaging material stacking unit can be a roll obtained by winding the web-shaped packaging material. As a means for rewinding and supplying the web-shaped packaging material from the roll, a roller that winds and feeds the web-shaped packaging material is provided. Simple structure and easy to control speed.

  In the packaging material supply device in the packaging device, the packaging device includes a former that bends the web-shaped packaging material into a cylindrical packaging material, and the cylindrical packaging material that travels outward and a product is charged therein. A vertical bag-making filling and packaging device for manufacturing a bag packaging filled with the product by sealing the cylindrical packaging material filled with the product and the cylindrical packaging material filled with the product, wherein the intermittent feeding means is the cylindrical packaging material It can be a means to act on and to send intermittently. The intermittent feeding means is disposed outside the filling cylinder, and moves the cylindrical packaging material such as an endless belt, a roller, or a horizontal sealer that travels with the cylindrical packaging material sandwiched between the intermittent feeding means. It can be a horizontal closing means that is sandwiched and pulled down.

The packaging material supply device in the packaging device according to the present invention is a packaging material supply device applied to a packaging device for packaging a product with a web-shaped packaging material as described above, and the web-shaped packaging material is continuously fed by a continuous feeding means. On the other hand, the intermittent feeding means arranged in the packaging device causes the web-shaped packaging material to run intermittently in accordance with the packaging operation of the packaging device. The storage means arranged downstream of the continuous feeding means and in the middle of the packaging device absorbs the difference in the feed amount of the web-shaped packaging material by both feeding means. Since the suction means with the suction surface applied to the web-shaped packaging material is disposed on the outlet side of the storage means, in combination with the blowing of air from the air blowing tool, the web-shaped packaging material is provided with the suction means. Running resistance is given when passing through the area. Therefore, without providing a weight roller or a tension roller, the web-like packaging material fed to the packaging device can be prevented from fluttering, and an appropriate constant tension can be applied to the web-like packaging material that is being supplied to provide a stable web. The packaging material can be supplied. As a result, it is possible to manufacture a package that is accurate and beautiful and has a very low incidence of defective products. Furthermore, when applied to a bag making filling and packaging apparatus, in the packaging material supply apparatus according to the present invention, the web-like packaging material does not loosen on the former when the intermittent feeding is stopped, and a constant tension is applied. Is done. In addition, web-like packaging material even at the time of feeding resumed It is also no butter Tsu key is pulled without and strongly. Therefore, the loose web-like packaging material is scratched due to being strongly pressed against the edge of the former, and further, the scratch is not left. Furthermore, according to the present invention, since the storage means is composed of two guide plates arranged opposite to each other, the storage means can be configured in a very simple structure. Since the guide plate is arranged vertically with the web-like packaging material coming in and out from above and the reversing part placed on the lower side, the web-like packaging material is in a form that hangs down naturally between the guide plates, and the guide plate Since air is blown toward the reversing part located on the bottom side of the web-like packaging material hanging from the air blowing tool composed of a pipe disposed between the upper ends of the web-like packaging material, the web-like packaging material can be stably stored The blown air will flow smoothly from the left and right openings between the guide plates without causing a turbulent flow like when returning inside the box, so the web-like packaging material is given a stable tension and is unnecessary. In addition, it is possible to prevent the occurrence of slack and displacement that cause wrinkles and poor running. Further, in the storage means , the web packaging material can be stored regardless of the width size and the tension can be kept constant as long as the dimensions are within the width of the guide plate, and the interval between the two guide plates is arranged. Can be made compact by making the space occupied by the storage means as small as possible. Furthermore, since the sensor for detecting the web-like wrapping material existing in the optical path passing through the optical path is arranged in the guide plate in the vertical direction, continuous feeding is performed according to the position of the reversing part detected by the sensor. By controlling the feeding speed of the web-shaped packaging material by the means, the length of the web-shaped packaging material stored in the storage means can be quickly controlled to the target length.

  Hereinafter, an embodiment of a packaging material supply apparatus in a packaging apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic view showing an embodiment of a packaging material supply apparatus in the packaging apparatus according to the present invention, and FIG. 2 is a front view of the packaging material supply apparatus shown in FIG. FIG. 1 is a diagram showing a packaging material supply apparatus when applied to a vertical bag making filling packaging apparatus as a packaging apparatus.

  The packaging material supply apparatus 1 shown in FIG.1 and FIG.2 is attached to the vertical bag making filling packaging apparatus 30 provided with the filling cylinder 31 into which the product A is thrown in, for example from a hopper. The vertical bag making and filling device 30 may be a well-known packaging device. In addition to the filling tube 31 having a cylindrical cross section, the vertical bag making filling and packaging device 30 is attached to the upper part of the filling tube 31 and wraps a flat web-like packaging film Fw. A former 32 that bends into the film Ft, a vertical sealing means 33 that seals the side edges of the tubular packaging film Ft that are joined to each other, and although not shown, are formed in advance from the tubular packaging film Ft and are filled in the filling cylinder 31. A horizontal heat seal is applied to the cylindrical packaging film Ft at the upper part of the packaging bag body P containing the introduced product A to seal the upper part of the packaging bag body P and to form a bottom part that becomes the subsequent packaging bag B. Sealing means 34 is provided.

  The vertical sealing means 33 can be composed of a pair of vertical heat seal bars that are moved closer to and away from each other by an operating mechanism such as an air cylinder. Further, the lateral seal means 34 can be constituted by a pair of lateral heat seal bars that are moved closer to and away from each other by an operating mechanism such as a cam link mechanism. A cutter 35 for cutting the bag wrapping body from the tubular wrapping film Ft can be provided at an intermediate position of one horizontal heat seal bar so as to be able to enter and exit. On both outer sides of the filling cylinder 31, intermittent feeding means 36 are disposed for traveling with the tubular packaging film Ft sandwiched between the filling cylinder 31 (only one side is shown). The intermittent feeding means 36 includes a drive source 37 such as a servo motor, pulleys 38 and 38 driven by the drive source 37, and a feed belt 39 wound around the pulleys 38 and 38. Since the vertical sealing means 33 and the horizontal sealing means 34 are intermittently operated, the drive source 37 intermittently drives the feed belt 39 in accordance with this intermittent operation, so that the cylindrical packaging film Ft and a part of the upstream thereof The web-shaped packaging material Fw is intermittently fed.

  On the other hand, the web-shaped packaging material Fw is continuously fed out by the continuous feeding means 41 from the roll 40 winding the web-shaped packaging material Fw. The continuous feed means 41 includes a feed roller 42 around which the web-shaped packaging material Fw is wound and a pressing roller 43 that presses the web-shaped packaging material Fw against the feed roller 42. The feed roller 42 is driven by a dedicated servo motor. By rotating the feed roller 42, the web-shaped packaging material Fw is continuously fed according to the amount of rotation.

  As will be described later, the web-shaped packaging material Fw continuously drawn out by the continuous feeding means 41 is stored in the subsequent storage means 2 and is given tension. The storage unit 2 can absorb a difference in feed amount between the continuous feed unit 41 and the intermittent feed unit 36. The web-shaped packaging material Fw to which tension is applied through the storage means 2 is sent to the above-described vertical bag making and filling and packaging apparatus 30 while being guided by guide rollers 25 and 26 disposed at appropriate positions. The web-shaped packaging material Fw is stably fed toward the former 32 by the pulling force of the intermittent feeding means 36 provided in the vertical bag making filling and packaging apparatus 30 and serving as a paper feeding means.

  The storage means 2 includes two guide plates 3 and 4 that are arranged generally parallel to each other in the vertical direction and opposed to each other. The two guide plates 3 and 4 are formed of an appropriate plate material having a plate width equal to or larger than the width of the web-shaped packaging material Fw, such as a transparent plate or a metal plate. However, as will be described later, a hole, a cut, or the like can be appropriately formed from the viewpoint of arrangement with a sensor, a mirror, or a suction unit. The upper, lower, left, and right sides of the guide plates 3 and 4 are open, the open upper part 5 is an entrance / exit part of the web-like packaging material Fw, and the bottom part is an open lower part 6 unlike the conventional suction chamber. The web-like wrapping material Fw that is continuously drawn out has travel parts Fw1 and Fw2 that travel along the plate surface inside the two guide plates 3 and 4, and a reversing part Fw3 that connects the travel parts Fw1 and Fw2. The storage part which consists of is formed. The web-shaped packaging material Fw fed from the feed roller 42 descends along the guide plate 3 on the inlet side in the storage unit 2 in the traveling unit Fw1, and then reverses in the reversing unit Fw3 near the lower end of the guide plate 3. Then, it rises along the guide plate 4 on the exit side in the traveling part Fw2. Thus, the storage means 2 is basically composed of the two guide plates 3 and 4 and has a very simple structure, but the storage form of the web-like packaging material Fw is reversed with the traveling parts Fw1 and Fw2. Part Fw3.

  The open upper portion 5 of the guide plate 4 is on the exit side of the web-like packaging material Fw, and a suction means 7 comprising a fan motor 8 and a fan 9 driven by the fan motor 8 is disposed in the vicinity thereof. . The suction means 7 has the suction surface 10 applied to the web-shaped packaging material Fw, and sucks air when the fan 9 rotates. Therefore, the suction surface 10 of the web-shaped packaging material Fw has a negative pressure. The portion of the guide plate 4 corresponding to the suction surface 10 has a window or mesh plate structure and can suck air. On the other hand, normal outside air pressure is acting on the inner side of the storage means 2 of the web-shaped packaging material Fw on the opposite side to the suction surface 10. This pressure difference causes a running resistance when the web-shaped packaging material Fw travels. Therefore, the web-shaped packaging material Fw can be given a running resistance in a region passing through the suction surface 10. Based on this running resistance, tension acts on the web-shaped packaging material Fw drawn by the intermittent feeding means 36 without providing a weight roller or a tension roller. Since the running resistance is kept at the same level if the pressure difference is constant, the tension is also kept constant regardless of fluctuations in the amount stored in the storage means 2. Since the rotation amount of the fan motor 8 is variable, the running resistance, that is, the tension can be made variable by changing the rotation amount according to the characteristics (material, thickness, etc.) of the web-shaped packaging material Fw.

  The storage means 2 is provided with a slow power bar type air blowing tool 15. The air blowing tool 15 is provided in the open upper part 5 of the storage means 2 in the form of a tube extending in the width direction of the web-shaped packaging material Fw. From the plurality of outlets opened side by side to the reversing part Fw3 Air is blown downward. The air blown out from the air blowing tool 15 acts mainly on the reversal part Fw3 of the web-shaped packaging material Fw and functions to blow the web-shaped packaging material Fw downward. On the other hand, the web-shaped packaging material has a property of being easily charged with static electricity, and the charged web-shaped packaging material adheres to the packaging materials or other devices and easily causes trouble. Since the air spraying tool 15 is a slow power bar type, the web-like packaging material Fw is prevented from clinging except for static electricity charged on the web-like packaging material Fw. Therefore, the slack and deviation that appears in the web-shaped packaging material Fw due to the difference in the feed amount is absorbed by the action of air, and can be prevented from developing into a large slack or deviation.

  The suction means 7 may be a duct connected to a suction source and having the suction surface 10 side directed to the web-shaped packaging material Fw. FIG. 3 shows an example using this duct 18. By guiding the duct 18 from a suction source such as a suction pump to the storage means 2, as in the case of the fan, the web-like packaging material Fw against which the suction surface 19 of the duct 18 hits the outside air acting on the opposite side. There is a pressure difference with the pressure. Due to the running resistance, tension is given to the web-shaped packaging material Fw toward the vertical bag making filling and packaging apparatus 30. In this case, the suction source can be used as a supply source of air to the air blowing tool 15.

  In the guide plate 4, a plurality of sensors 20 that detect the position of the reversal part Fw <b> 3 of the web-like packaging material Fw can be arranged vertically in the center in the width direction. Corresponding to the sensor 20, the guide plate 4 can be formed with a hole or slit for the light path, or the corresponding part can be made transparent. In this example, the sensor is an optical type, and a light reflecting mirror 21 is arranged side by side on the opposite guide plate 3 at a position facing the sensor 20. If the web-like packaging material Fw does not exist in the optical path between the sensor 20 and the mirror 21, the sensor 20 can detect the light emitted by itself, but if the web-like packaging material Fw exists in the optical path. The sensor 20 cannot detect the light emitted by itself because it is blocked by the web-like packaging material Fw. Since the lower limit position at which the sensor 20 does not detect its own light corresponds to the reversal portion Fw3 of the web-shaped packaging material Fw, the position of the reversal portion Fw3 that may fluctuate up and down can be sequentially detected. By detecting the position of the reversal part Fw3, the length of the web-shaped packaging material Fw stored in the storage means 2 is calculated. Based on this calculated length, the feed speed of the web-shaped packaging material Fw by the continuous feed means 41 can be controlled by a control device (not shown). By controlling the feed speed of the web-shaped packaging material Fw, the length of the web-shaped packaging material Fw stored in the storage unit 2 can be controlled to a target length. When the position of the reversing portion Fw3 rises, the rotational speed of the feed roller 42 is increased, and when the position of the reversing portion Fw3 descends, the rotational speed of the feed roller 42 is decreased, and the storage amount of the web-like packaging material sent to the storage means 2 Is always controlled to be constant.

  FIG. 4 is a schematic view showing a web-like packaging material feeding state around the former when the intermittent feeding of the packaging material supply device shown in FIG. 1 is stopped, and FIG. (B) is a figure which shows the condition of the damage | wound which arises in a web-like packaging material. As indicated by imaginary lines in FIG. 4, in the bag making and filling and packaging apparatus having the former 32 for molding the web-shaped packaging material to which the packaging material supply apparatus is applied, conventionally, when the intermittent feeding of the web-shaped packaging material Fw is stopped. As a result of the slight advance due to the inertia and the absence of tension, a phenomenon occurs in which the web-like packaging material Fw is loosened and floats up from the former 32 (indicated by Fw ′). When the feed is resumed in this state, as shown in FIG. 4 (b), the web-shaped packaging material Fw has a scar 44 (indicated by an imaginary line) against which the edge of the former 32 is pressed. 44 does not disappear easily and remains. On the other hand, in the present invention, since the running resistance by the suction means 7 exists, the web-like packaging material Fw does not loosen on the former 32 when the intermittent feeding is stopped, and a constant tension is applied. Further, when the feed is resumed, the web-shaped packaging material Fw does not flutter and is not pulled strongly, so that the feed is smoothly resumed. Therefore, no flaws remain due to the loose web-like packaging material Fw being strongly pressed against the edge of the former.

  As mentioned above, although the example which applied the packaging material supply apparatus by this invention to supply of the web-shaped packaging material of a vertical type bag making filling packaging apparatus was demonstrated, this invention is not limited to this, Other packaging apparatuses, horizontal type bag making It is obvious that the present invention can be applied to a filling and packaging apparatus and an overwrapping apparatus.

It is the schematic which shows one Example of the packaging material supply apparatus in the packaging apparatus by this invention. It is a front view of the storage means of the packaging material supply apparatus shown in FIG. It is a fragmentary figure which shows another example of the packaging material supply apparatus shown in FIG. It is the schematic which shows the feeding state of the web-shaped packaging material around the former | foamer at the time of the stop of intermittent feeding of the packaging material supply apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging material supply apparatus 2 Storage means 3, 4 Guide plate 5 Open top 6 Open bottom 7 Suction means 8 Fan motor 9 Fan 10 Suction surface 15 Air blowing tool 18 Duct 19 Suction surface 20 Sensor 21 Mirror 25, 26 Guide roller 30 Vertical Mold making bag filling and packaging equipment 31 Filling cylinder 32 Former 33 Vertical seal means 34 Horizontal seal means 35 Cutter 36 Intermittent feed means 37 Drive source 38 Pulley 39 Feed belt 40 Roll 41 Continuous feed means 42 Feed roller 43 Pressing roller 44 Scar A Product P Packaging bag body Fw Web-like packaging film Ft Cylindrical packaging films Fw1, Fw2 Traveling part Fw3 Reversing part

Claims (5)

Continuous feeding means for continuously feeding the web-shaped packaging material, intermittent feeding means which is disposed in the packaging apparatus and causes the web-shaped packaging material to run intermittently according to the packaging operation of the packaging apparatus, and the continuous feeding means A storage means that is disposed on the downstream side and on the way to the packaging device and that can absorb the difference in the amount of feeding by the both feeding means,
The storage means includes two guide plates arranged to face each other, and the web-shaped packaging material continuously fed by the continuous feeding means is respectively inserted between the guide plates before and after the reversing part. Forming a slack running path with a running portion along each guide plate,
The both guide plates are arranged vertically with the web-shaped packaging material coming in and out from above and the reversing part placed on the lower side, and the upper, lower, left and right between the guide plates are open,
Between the upper ends of the both guide plates, an air blowing tool for blowing air downward between the traveling parts and toward the reversing part is disposed,
A suction means is provided on the outlet side of the storage means, the suction surface being applied to the web-shaped packaging material to give running resistance to the web-shaped packaging material ,
The air blowing tool is composed of a pipe formed with a plurality of outlets extending in the width direction of the web-shaped packaging material and opening downward.
An optical path is formed in the guide plate,
In the guide plate, sensors for detecting the web-shaped packaging material present in the optical path that passes through the optical path are arranged vertically, and depending on the position of the reversing part detected by the sensor, A packaging material supply apparatus in a packaging apparatus, comprising controlling a feeding speed of the web-shaped packaging material by a continuous feeding means .   The packaging material supply apparatus in the packaging apparatus according to claim 1, wherein the air spraying tool has a slow power function for removing static electricity charged in the web-shaped packaging material.   The suction means comprises a fan with the suction surface side facing the web-shaped packaging material, or a duct connected to a suction source and the suction surface side facing the web-shaped packaging material. The packaging material supply apparatus in the packaging apparatus of description.   2. The packaging material supply apparatus in a packaging apparatus according to claim 1, wherein the continuous feeding means is a feeding roller driven by a driving means and feeding out the web-shaped packaging material from the web-shaped packaging material stacking portion. The packaging device includes a former that bends the web-shaped packaging material into a cylindrical packaging material, a filling cylinder that allows the cylindrical packaging material to travel outward and a product is placed therein, and the product is filled This is a vertical bag making filling and packaging device that manufactures a bag packaging filled with the product by blocking the cylindrical packaging material, and the intermittent feeding means acts on the cylindrical packaging material and intermittently feeds it. The packaging material supply apparatus in the packaging apparatus of any one of Claims 1-4 which consists.

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