JP5090053B2 - Bag making and packaging machine - Google Patents

Description

  The present invention relates to a bag making and packaging machine, and more particularly to sealing of a packaging material.

  2. Description of the Related Art Conventionally, a technique for bagging a predetermined amount of a packaged item such as confectionery has been proposed. Specifically, the overlapping portion of the packaging material rounded into a cylindrical shape is sealed. Then, after a predetermined amount of the article to be packaged is put into the packaging material, the upstream side of the packaging material is sealed with a seal or the like. The sealed portion is cut with a cutter or the like.

  Such techniques are disclosed in, for example, Patent Document 1 and Patent Document 2 listed below. Regarding sealing of the overlapping portion of the packaging material, in Patent Document 1, sealing is performed by sandwiching the overlapping portion of the packaging material with a heat sealing die and a backup pad. In Patent Document 2, sealing is performed by sandwiching the overlapping portion of the packaging material between the rotating belt and the receiving member.

  By the way, in patent document 1, the backup pad is provided over the whole position facing a heat sealing die. However, in this aspect, the force applied to the packaging material is dispersed when the packaging material is sealed. If the force is dispersed, the force required for the seal is insufficient, and a seal failure is likely to occur.

Therefore, in Patent Document 2, the receiving member is divided into a plurality of parts for the purpose of preventing the dispersion of the force applied to the packaging material.
US Pat. No. 4,950,345 JP 2006-1552 A

  However, even with the technique of Patent Document 2, the force applied to the packaging material is dispersed in each of the plurality of receiving members, and there is a possibility that the force necessary for sealing is insufficient.

  This invention is made | formed in view of the situation mentioned above, and it aims at reducing the sealing failure of the overlap part of the packaging material rounded to the cylinder shape.

The bag making and packaging machine according to the present invention includes a forming mechanism, a vertical sealing mechanism, a horizontal sealing mechanism, and a receiving member, and wraps an object to be packaged while manufacturing a bag from a band-shaped packaging material. The forming mechanism rolls the belt-like packaging material into a cylindrical shape and forms the cylindrical packaging material. The vertical sealing mechanism seals the overlapping portion of the cylindrical packaging material with heat vertically along the direction in which the cylindrical packaging material extends. The horizontal sealing mechanism crosses the cylindrical packaging material and seals the cylindrical packaging material with heat. The receiving member is attached to the molding mechanism at a position facing the vertical sealing mechanism, and sandwiches the overlapping portion together with the vertical sealing mechanism. The receiving member is a curved spring steel extending in the vertical direction, and the curved portion of the spring steel presses the overlapping portion of the cylindrical packaging material from the forming mechanism to the vertical sealing mechanism, and the upper and lower ends of the spring steel Is detachably attached to the molding mechanism .

  According to such a bag making and packaging machine, the receiving member has elasticity, and the overlapping portion is pressed against the vertical seal mechanism by such elasticity, so that the force necessary for sealing can be applied to the overlapping portion, and thus Seal failure can be reduced.

Further, when cleaning the molding mechanism, the receiving member can be removed, and thus damage to the receiving member due to such cleaning can be prevented.

  From the viewpoint of preventing breakage of the receiving member, a cushioning material is preferably disposed on the surface of the receiving member on the side of the vertical seal mechanism. The cushioning material contacts the overlapping portion of the packaging material. Thereby, the shock to the packaging material caused by pressing the packaging material against the vertical seal mechanism can be absorbed by the cushioning material. Therefore, it is possible to prevent the packaging material sandwiched between the vertical seal mechanism and the receiving member from being damaged.

  As the buffer material, one having elasticity or one having heat resistance is preferably employed. According to the cushioning material having elasticity, the packaging material can be prevented from being damaged. According to the buffer material having heat resistance, the buffer material can be prevented from being damaged by the heat of the vertical seal mechanism.

  As the cushioning material, a material having a small friction on the surface on the vertical seal mechanism side may be adopted. Such a cushioning material does not hinder the conveyance of the packaging material.

  According to the bag making and packaging machine according to the present invention, the receiving member has elasticity, and the overlapping portion is pressed against the vertical seal mechanism by such elasticity, so that the force necessary for sealing can be applied to the overlapping portion, Therefore, sealing failure can be reduced.

1. Structure of Bag Making and Packaging Machine FIG. 1 is a diagram conceptually showing a bag making and packaging machine 1 according to an embodiment of the present invention. The bag making and packaging machine 1 includes a film roll holding unit 22 and a bag making unit 10. These components will be described later. First, an outline of the bag making and packaging machine 1 will be described.

<Outline of bag making and packaging machine>
The bag making and packaging device 1 packs a packaged material C such as confectionery by a predetermined amount using a packaging material. Specifically, the bag B filled with the articles C to be packaged is formed by sealing the packaging material rolled into a cylindrical shape in the vertical direction and the horizontal direction.

  For example, a thermoplastic film F can be used as the packaging material. Further, the amount of the article to be packaged C is measured by a measuring instrument 2 provided separately from the bag making and packaging machine 1 and sent to the bag making and packaging machine 1 by a predetermined amount. The measuring device 2 may be provided, for example, in a bag making and packaging machine.

<Film roll holder>
The film roll holding part 22 has a film roll and a sensor. The film roll is wound with a sheet-like film F and feeds out the film F.

  The film F fed out from the film roll is conveyed to the bag making unit 10 through the upper side of the bag making and packaging machine 1 through a dancer roller and the like. The dancer roller keeps the tension of the film F within a predetermined range, thereby preventing the film F from being loosened or meandering.

  The sensor is installed in the vicinity of the film roll, and detects the remaining amount of the film F wound around the film roll. When the remaining amount becomes a predetermined amount or less, it is informed that the remaining amount is low by lighting the lamp or buzzer.

<Bag making part>
FIG. 2 is a perspective view conceptually showing the bag making unit 10. The bag making unit 10 includes a forming mechanism 13, a transport mechanism 14, a vertical seal mechanism 16, a horizontal seal mechanism 17, a receiving member 31, and a buffer material 4. Below, each component is demonstrated concretely. The receiving member 31 and the cushioning material 4 are shown in FIG.

(Molding mechanism)
The forming mechanism 13 includes a tube 13b and a former 13a, and rounds the film F conveyed from the film roll holding unit 22 into a cylindrical shape.

  The tube 13b is a cylindrical member, and both the upper end and the lower end are open. From the upper end of the tube 13b, a predetermined amount of the article to be packaged C measured by the measuring instrument 2 is charged. The input packaged article C passes through the tube 13b and is discharged from the lower end of the tube 13b into the bag B before sealing.

  The former 13a is disposed on the upper end side of the tube 13b so as to surround the tube 13b.

  Specifically, the portion of the former 13a on the rear side with respect to the tube 13b has a shape in which the collar of the sailor suit is widened to the rear side. On the front side with respect to the tube 13b, the portion surrounding the tube 13b from the right side and the portion surrounding the tube 13b from the left side overlap.

  The film F conveyed from the rear side with respect to the tube 13b is fed between the former 13a and the tube 13b while sliding on the upper surface of the former 13a. Thereby, the ends of the film F overlap on the front side of the tube 13b while the film F is rolled into a cylindrical shape (overlapping portion F2).

  The tube 13b and the former 13a can be replaced according to the size of the bag B to be molded.

(Transport mechanism)
The transport mechanism 14 includes a driving roller 14a, a driven roller 14b, and a belt 14c, and transports the cylindrical film F surrounding the tube 13b downward (FIG. 2). Specifically, the driving roller 14a is disposed on the upper side, and the driven roller 14b is disposed on the lower side. The belt 14c is stretched over the driving roller 14a and the driven roller 14b.

  The film F is sandwiched between the belt 14c and the tube 13b. As the drive roller 14a rotates, the belt 14c also rotates. Thereby, the film F which contacted the belt 14c is conveyed below. The drive roller 14a can be rotated by, for example, a motor.

  FIG. 3 is a view of the bag making unit 10 as viewed from the front side. In FIG. 3, the conveyance mechanism 14 is arrange | positioned with respect to the tube 13b on both the left side and the right side. According to this aspect, it is easy to convey the cylindrical film F downward.

(Vertical seal mechanism)
FIG. 4 is a perspective view conceptually showing the vertical sealing mechanism 16. FIG. 5 is a view showing a cross section at a position VV shown in FIG.

  The vertical sealing mechanism 16 seals the overlapping portion F2 of the rounded film F in the vertical direction by heat. Here, the vertical direction refers to the direction in which the film F is conveyed.

  Specifically, the vertical seal mechanism 16 includes a heater belt 16a, a heat generating portion 16b, and a pulley 16c. One pulley 16c is arranged on each of the upper side and the lower side. The heater belt 16a extends over these pulleys 16c, and a predetermined tension is applied. The heater belt 16a can be a metal belt, and has a thickness of 0.15 mm, for example.

  As the pulley 16c rotates, the heater belt 16a also rotates. At this time, the heater belt 16a rotates at substantially the same speed as the film F conveyance speed. The pulley 16c can be rotated by, for example, a motor.

  The heating element 16b heats the heater belt 16a. Specifically, in FIG. 4, the heating element 16b is arranged on the inner peripheral side of the heater belt 16a. And heat is given to the part which rotates the tube 13b side among heater belts 16a, and this part is heated to 140-150 degreeC.

  The vertical sealing mechanism 16 seals the overlapping portion F2 (FIG. 5) sandwiched between the heater belt 16a and a receiving member 31 described later in the vertical direction by heat (seal portion F1).

  The vertical sealing mechanism 16 is controlled by the control unit 20 as shown in FIG. For example, the controller 20 controls the temperature of the heating element 16b, the rotation speed of the heater belt 16a, and the like.

(Horizontal seal mechanism)
FIG. 6 is a diagram conceptually showing the lateral seal mechanism 17. The horizontal sealing mechanism 17 is disposed below the lower end of the tube 13b, seals the rounded feel F in the horizontal direction, and seals the top and bottom of the bag B.

  Specifically, the lateral seal mechanism 17 has a pair of lateral seal portions 17a. Each of the pair of lateral seal portions 17a includes a seal jaw 51, a connecting portion 17b, and a shaft 17c.

  The connecting portion 17b connects the sealing jaw 51 and the shaft 17c.

  The shaft 17c can rotate and can move back and forth. For example, the shaft 17c can be rotated by using a turning motor. Moreover, the shaft 17c can be moved back and forth by using the shaft moving motor.

  Seal jaws 51 (hereinafter referred to as a pair of seal jaws 51) belonging to the pair of horizontal seal portions 17 are arranged side by side in the front-rear direction. The pair of sealing jaws 51 seals the film F, which has been sealed in the vertical direction by the vertical sealing mechanism 16, from the front side and the rear side in the horizontal direction (position r2). At this time, the sealing jaw 51 crosses the cylindrical film F and seals the film F in the lateral direction. Thereby, the upper side of the bag B packed with the article to be packaged C can be sealed. Here, the horizontal direction is a direction toward the left side or the right side.

  The film F is sealed by the pair of sealing jaws 51 by applying heat and pressure to the film F. For example, the pressure applied to the film F can be adjusted by a shaft moving motor that moves the shaft 17c back and forth.

  After sandwiching the film F from the front side and the rear side, the pair of sealing jaws 51 moves downward to a predetermined position r1 while sealing the film F (trajectory T1). Thereby, the film F sealed in the horizontal direction is moved downward. Thereafter, the sealing jaw 51 opens the film F.

  Then, the pair of sealing jaws 51 moves from the predetermined position r1 to the predetermined position r2 while drawing an arc from the opposite side to each other (trajectory T2). The predetermined position r2 is below the lower end of the tube 13b.

  The pair of sealing jaws 51 moved to the predetermined position r1 again seals the film F in the lateral direction with the film F sandwiched from the front side and the rear side.

  Note that the movement of the seal jaw 51 along the track T1 is executed by the shafts 17c belonging to the pair of horizontal seal portions 17a moving to opposite sides while rotating. The movement of the seal jaw 51 along the track T2 is executed only by the rotation of the shaft 17c.

  A cutter is incorporated in one of the pair of seal jaws 51. With such a cutter, the vicinity of the center in the vertical direction of the portion sealed in the horizontal direction is cut. Thereby, while sealing the upper side of the bag in which the article to be packaged C is packed, the downstream side of the bag in which the article to be packaged C is packed next can also be sealed. Therefore, it is not necessary to seal the downstream side of the bag again before the packaged item C is introduced.

(Receiving member)
The receiving member 31 will be described with reference to FIG. The receiving member 31 is attached to the tube 13 b and faces the vertical seal mechanism 16. Thereby, the overlapping portion F2 of the film F is sandwiched between the vertical sealing mechanism 16 and the receiving member 31 (FIG. 5). The overlapping portion F2 is sealed in the vertical direction by heat by the vertical sealing mechanism 16 (seal portion F1).

  More specifically, the receiving member 31 faces the portion of the heater belt 16a belonging to the vertical seal mechanism 16 on the tube 13b side. The overlapping portion F2 is sandwiched between the heater belt 16a and the receiving member 31 (FIG. 5).

  The shape and the like of the receiving member 31 will be described in detail in “2. Features of the bag making and packaging machine” described later.

(Buffer material)
The cushioning material 4 is disposed on the surface of the receiving member 31 on the vertical sealing mechanism 16 side. The cushioning material 4 contacts the overlapping portion F2 between the vertical sealing mechanism 16 and the receiving member 31. The thickness of the buffer material 4 is about 3 to 6 mm.

  By providing the cushioning material 4 between the receiving member 31 and the film F, it is possible to prevent the film F sandwiched between the vertical sealing mechanism 16 and the receiving member 31 from being damaged.

  As the buffer material 4, one having elasticity or one having heat resistance can be adopted. According to the buffer material 4 having elasticity, the film F can be prevented from being damaged. According to the buffer material 4 having heat resistance, the buffer material 4 can be prevented from being damaged by the heat of the vertical seal mechanism 16.

  As the cushioning material 4, a material having a small friction on the surface on the vertical seal mechanism 16 side may be adopted. The buffer material 4 does not hinder the conveyance of the film F. That is, even when the film F is sandwiched between the vertical sealing mechanism 16 and the receiving member 31, the friction generated between the cushioning material 4 and the film F is small, so that the film F can be easily conveyed downward. .

  In addition, as a material of the buffer material 4, Teflon (registered trademark) rubber, silicon rubber, silicon sponge, leather, wood, ultra high molecular polyethylene, or the like can be adopted. Of course, not only these materials, but also various materials can be adopted as long as they have elasticity and heat resistance and have low friction.

2. Features of Bag Making and Packaging Machine The bag making and packaging machine 1 according to the embodiment of the present invention is particularly characterized by the receiving member 31. Below, the shape of the receiving member 31 and the attachment to the tube 13b are demonstrated.

<Shape of receiving member>
FIG. 7 is a view of the bag-making unit 10 as viewed from the right side, and conceptually shows the shape of the receiving member 31. FIG. 8 is an enlarged view of a region VIII shown in FIG. 7 in order to clarify the shape of the receiving member 31.

  The receiving member 31 has elasticity, and the elasticity causes the overlapping portion F <b> 2 (FIG. 5) of the film F to be pressed against the vertical sealing mechanism 16.

  Specifically, the receiving member 31 extends vertically while curving toward the vertical seal mechanism 16 side. And the upper end and lower end of the receiving member 31 are attached to the tube 13b. In addition, the thickness of the receiving member 31 is about 0.6 mm.

  According to such a shape of the receiving member 31, the receiving member 31 generates a repulsive force against the pressure from the vertical seal mechanism 16 side. That is, the receiving member 31 is elastic.

  The receiving member 31 may be curved toward the vertical seal mechanism 16 as shown in FIGS. 9 and 10, for example. That is, in FIG. 8, the receiving member 31 is closest to the vertical sealing mechanism 16 near the center in the vertical direction, but the receiving member 31 is the vertical sealing mechanism on the upper side in FIG. 9 and on the lower side in FIG. 16 is the closest.

  According to the receiving member 31 described above, the overlapping portion F2 is pressed against the vertical seal mechanism 16 by its elasticity, so that a force necessary for sealing can be applied to the overlapping portion F2. Therefore, the sealing failure of the overlapping portion F2 can be reduced.

  The receiving member 31 is preferably made of a metal, and for example, spring steel can be used. Thereby, the intensity | strength of the receiving member 31 can be raised and the elasticity of the receiving member 31 can be maintained. If a stainless spring material (JIS standard / SUS304CSP) is adopted for the receiving member 31, rusting of the receiving member 31 can also be prevented.

  Further, if a receiving member 31 that can apply a uniform pressure to the vertical sealing mechanism 16 is employed, the sealing failure can be reduced more efficiently.

  5 and 7 to 10, the buffer material 4 is attached to the receiving member 31, and the shock to the film F caused by pressing the film F against the vertical seal mechanism 16 is absorbed by the buffer material 4. .

  However, since the receiving member 31 itself has elasticity, the impact on the film F can be absorbed without the buffer material 4.

  If the receiving member 31 further has heat resistance or has a small friction on the surface on the side of the vertical seal mechanism 16, the receiving member 31 can also have the function of the buffer material 4.

  For example, by using Teflon (registered trademark) or silicon as a material, the receiving member 31 having the function of the buffer material 4 can be obtained. However, when food such as confectionery is employed as the packaged item C, the material of the receiving member 31 must be one that does not violate the Food Sanitation Law.

<Attaching the receiving member to the tube>
8 to 10, the receiving member 31 is detachably attached to the tube 13b. 8-10, the support members 131 and 132 are arrange | positioned one by one up and down on the surface of the front side of the tube 13b. The support members 131 and 132 detachably support the upper end and the lower end of the receiving member 31. Moreover, the support member 131 supports the receiving member 31 on the downstream side in the transport direction of the film F, and prevents the receiving member 31 from shifting in the transport direction. This will be specifically described below.

  FIG. 11 is a view of the bag making unit 10 as viewed from below. The support member 131 has a concave shape, and a hole 131a for supporting the receiving member 31 is formed together with the tube 13b by utilizing the recessed portion. In other words, the hole 131a is surrounded by the support member 131 and the tube 13b.

  The support member 132 also has the same shape as the support member 131, and forms a hole 132a for supporting the receiving member 31 together with the tube 13b.

  FIG. 12 is a view of the receiving member 31 shown in FIGS. 8 to 10 as viewed from the front side. The lower end of the receiving member 31 has a convex shape on the lower side. The protruding portion 311 at the lower end is inserted into the hole 131a (FIGS. 8 to 10). And the convex shoulder part of a lower end is hooked on the support member 131, and it is prevented that the receiving member 31 shift | deviates below (FIG. 11).

  As a result, even if the friction force generated between the film F and the film F causes a force toward the downstream side of the receiving member 31, the receiving member 131 does not shift downstream (conveying direction).

  As described above, when the overlapping portion F2 of the film F is sealed in the vertical direction, the overlapping portion F2 is sandwiched between the receiving member 131 and the heater belt 16a of the vertical sealing mechanism 16. Therefore, when the heater belt 16a rotates, not only the film F but also the receiving member 31 generates a force toward the downstream side.

  However, even if such a force is generated, the receiving member 31 described above is supported by the first support member 131, and therefore the receiving member 31 does not shift downstream (conveying direction).

  Since the part 311 inserted into the hole 131a is surrounded by the support member 131 and the tube 13b (FIG. 11), it does not deviate from the position of the overlapping part F2. In other words, the support member 131 supports the receiving member 31 on the downstream side, and prevents the receiving member 31 from shifting from the position of the overlapping portion F2.

  The upper end of the receiving member 31 has a convex shape on the upper side (FIG. 12). The protruding portion 312 at the upper end is inserted into the hole 132a (FIGS. 8 to 10). By supporting the upper end of the receiving member 31 with the support member 132, the receiving member 31 can be fixed to the tube 13b.

  Since the portion 321 inserted into the hole 132a is surrounded by the support member 132 and the tube 13b, it does not deviate from the position of the overlapping portion F2. In other words, the support member 132 supports the receiving member 31 on the downstream side and prevents the receiving member 31 from shifting from the position of the overlapping portion F2.

  From the standpoint of fixing the receiving member 31 to the tube 13b, the upper end of the receiving member 31 may not be convex, and it is only necessary that the upper end is inserted into the hole 132a.

  Since the receiving member 31 described above is detachable, the receiving member 31 can be removed when cleaning the forming mechanism 13, particularly the tube 13b. Therefore, damage to the receiving member 31 due to such cleaning can be prevented.

  In addition, when the cushioning material 4 is attached to the receiving member 31, peeling of the cushioning material 4 from the receiving member 31 can also be prevented.

  As described above, when the receiving member 31 is curved toward the vertical seal mechanism 16, the receiving member 31 can be easily detached from the tube 13 b. If the distance from the tube 13b of the portion of the receiving member 31 that is closest to the vertical seal mechanism 16 is about 2 mm, it is easier to attach and detach.

  Here, the support members 131 and 132 respectively prevent the receiving member 31 from shifting to the downstream side (conveying direction) (function A) and the receiving member 31 from the position of the overlapping portion F2. Although the case where both of the functions (function B) are provided has been described, for example, separate support members for the functions A and B may be provided in the tube 13b.

It is a figure which shows notionally the bag making packaging machine 1 concerning embodiment of this invention. 1 is a perspective view conceptually showing a bag making unit 10. FIG. It is the figure which looked at the bag making part 10 from the front side. FIG. 3 is a perspective view conceptually showing a vertical seal mechanism 16. It is a figure which shows the cross section in the position VV shown by FIG. It is a figure which shows the horizontal seal | sticker mechanism 17 notionally. It is the figure which looked at the bag making part 10 from the right side. It is the figure which expanded and showed the area | region VIII shown by FIG. It is a figure which shows the shape of the receiving member 31 notionally. It is a figure which shows the shape of the receiving member 31 notionally. It is the figure which looked at the bag making part 10 from the lower side. It is the figure which looked at the receiving member 31 from the front side.

DESCRIPTION OF SYMBOLS 1 Bag making packaging machine 4 Buffer material 13 Forming mechanism 16 Vertical seal mechanism 17 Horizontal seal mechanism 31 Receiving member B Bag F Film (packaging material)
F1 overlap

Claims (5)

A bag making and packaging machine that wraps a package while manufacturing a bag from a band-shaped packaging material,
A forming mechanism for forming the tubular packaging material by rounding the belt-shaped packaging material into a tubular shape;
A longitudinal seal mechanism that seals the overlapping portion of the tubular packaging material with heat vertically along the direction in which the tubular packaging material extends;
A horizontal sealing mechanism that heat-seals the cylindrical packaging material across the cylindrical packaging material, and is attached to the molding mechanism at a position facing the vertical sealing mechanism, and the overlapping portion together with the vertical sealing mechanism A receiving member sandwiching the
The receiving member is a curved spring steel extending in the vertical direction, and the upper portion and the lower end of the spring steel are pressed against the vertical seal mechanism from the forming mechanism by bending the spring steel. Removably attached to the molding mechanism,
Bag making and packaging machine. A cushioning material disposed on a surface of the receiving member on the vertical seal mechanism side and contacting the overlapping portion;
The bag making and packaging machine according to claim 1 . The cushioning material has elasticity;
The bag making and packaging machine according to claim 2 . The buffer material has heat resistance,
The bag making and packaging machine according to claim 2 or claim 3 . The friction on the surface of the cushioning material on the side of the vertical seal mechanism is small,
The bag making and packaging machine according to any one of claims 2 to 4 .

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