JP2020001707A - Filling/packaging machine - Google Patents

Abstract

To provide a filling/packaging machine with a structure which improves durability of a bag body and prevents increase in manufacturing cost while maintaining enough retention force of the bag body.SOLUTION: A filling/packaging machine fills and packs a content C in a bag body B with a bag opening part Ba. The filling/packaging machine includes a retaining part 20 for retaining the bag body B with the bag opening part Ba facing upward in a vertical direction and a filling part for filling the content C from the bag opening part Ba into the bag body B retained by the retaining part 20. The retaining part 20 has a pair of holding parts 26, each of which tucks and holds an end of the bag body B in the width direction, and a pair of holding faces of the holding part 26, which tucks the bag body B, has plural projections for contacting the bag body B. The plural projections are arranged in grid patterns as inclining in a prescribed angle against vertical direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filling and packaging machine.

  2. Description of the Related Art A filling and packaging machine that fills and packs contents into a bag such as a pouch is known. For example, Patent Literature 1 describes a filling and packaging machine including a pair of arms having a clip mechanism for holding a pouch.

JP-A-7-313128

  When the bag body is gripped by the above-described clip mechanism (grip portion), the gripping force of the clip mechanism needs to be sufficiently large to withstand the weight of the bag body filled with the contents. However, if the force for simply nipping the bag by the clip mechanism is increased, the load on the clip mechanism is increased, and there is a problem that the durability of the filling and packaging machine is reduced.

  To solve this problem, the frictional force between the bag and the clip mechanism is improved by providing a rubber member on the gripping surface that sandwiches the bag, or by attaching particles such as diamond to make the gripping surface file-like. There is a method of improving the gripping force. However, when the rubber member is provided, there is a problem that the rubber member is easily deteriorated and the durability of the filling and packaging machine cannot be sufficiently improved. Further, in the case where the gripping surface is formed into a file shape by fixing particles such as diamond, there is a problem that the cost required for processing the gripping surface is large and the manufacturing cost of the entire filling and packaging machine increases.

  In view of the above circumstances, one aspect of the present invention provides a filling and packaging machine having a structure capable of improving durability and suppressing an increase in manufacturing cost while sufficiently securing a gripping force of a bag. It is one of the purposes.

  One aspect of the filling and packaging machine of the present invention is a filling and packaging machine that fills and packs contents into a bag having a bag mouth, wherein the bag mouth faces vertically upward. A holding portion for holding a body, and a filling portion for filling the contents from the bag mouth portion in the bag body held by the holding portion, wherein the holding portion has both sides in the width direction of the bag body. A pair of gripping portions that respectively hold and grip the ends of the bag, and a pair of gripping surfaces of the gripping portion that sandwich the bag are provided with a plurality of protrusions that are in contact with the bag. Are characterized by being arranged in a lattice shape obliquely inclined at a predetermined angle with respect to the vertical direction.

  According to one aspect of the present invention, there is provided a filling and packaging machine having a structure capable of improving durability while sufficiently securing a gripping force of a bag body and suppressing an increase in manufacturing cost.

It is the schematic structure figure which looked at the filling and packaging machine of this embodiment from the upper part. It is a perspective view showing a part of holding part of this embodiment. It is a partial sectional view showing the arm of this embodiment. It is the figure which looked at the contact member of this embodiment from the grip surface side. It is a perspective view showing a projection part of this embodiment.

  Hereinafter, a filling and packaging machine according to an embodiment of the present invention will be described with reference to the drawings. It should be noted that the scope of the present invention is not limited to the following embodiment, and can be arbitrarily changed within the technical idea of the present invention. In the following drawings, the scale and the number of each structure may be different from the scale and the number of the actual structure in order to make each configuration easy to understand. The Z-axis direction shown in the drawings is a vertical direction as appropriate. The positive side (+ Z side) in the Z-axis direction is the upper side in the vertical direction. The negative side (−Z side) in the Z-axis direction is the lower side in the vertical direction.

  The filling and packaging machine 1 of the present embodiment shown in FIG. 1 is an apparatus that fills a bag B with contents C and packs the contents. As shown in FIG. 2, the bag body B has a bag mouth Ba. In the present embodiment, the bag B is a bag generally called a pouch. The bag body B is formed into a bag shape, for example, by sealing a peripheral portion other than the portion that becomes the bag mouth portion Ba by laminating films. The content C filled in the bag B is not particularly limited, and is, for example, a food, a detergent, a cosmetic, or the like. In the present embodiment, the contents C include, for example, a solid C1 and a liquid C2.

  As shown in FIG. 1, the filling and packaging machine 1 includes a first transport device 10, a bag supply device 40, a printing device 50, a bag opening device 60, a content filling device (filling unit) 70, It includes a sealing device 80, a second sealing device 90, a cooling press device 100, a second transport device 110, and a control device 120.

  The first transfer device 10 is a device that holds and transfers the bag body B supplied from the bag supply device 40. In the present embodiment, the first transfer device 10 rotates counterclockwise around the central axis Ax when viewed from above in the vertical direction, and moves the held bags B from the position P1 to the position P8 in order. The position P1 to the position P8 are positions arranged at equal intervals over one circumference along the circumferential direction around the central axis Ax. In the following description, the circumferential direction around the central axis Ax is simply referred to as “circumferential direction”, and the radial direction about the central axis Ax is simply referred to as “radial direction”.

The first transfer device 10 has a holding unit 20 and a rotating unit 30.
The rotating unit 30 has a circular shape centered on the central axis Ax when viewed from above in the vertical direction. The rotating unit 30 rotates counterclockwise around the central axis Ax when viewed from above in the vertical direction, and moves the holding unit 20 along the circumferential direction. The rotating unit 30 rotates intermittently and moves the holding unit 20 sequentially from the position P1 to the position P8.

  The holding section 20 is fixed to the rotating section 30. In the present embodiment, a plurality of holding units 20 are provided. The plurality of holding units 20 are arranged at equal intervals over one circumference in the circumferential direction. In the present embodiment, for example, eight holding units 20 are provided. When each operation to be described later is performed by each device of the filling and packaging machine 1, the eight holding units 20 are in a state of being located at each of the positions P1 to P8.

  Each holding unit 20 includes a pair of arms 21 and 22, an arm driving unit (driving unit) 23, and an opening / closing driving unit 24. The pair of arms 21 and 22 extend radially outward from the rotating unit 30. The pair of arms 21 and 22 are opposed to each other with a space therebetween in the circumferential direction. In the present embodiment, the circumferential distance between the pair of arms 21 and 22 is changed by being rotated around the rotation axes R1 and R2 by the arm driving unit 23, respectively. The rotation axes R1 and R2 extend in the vertical direction.

  In the following description, a direction parallel to the arm center axis J passing through the center of the pair of arms 21 and 22 in the circumferential direction is referred to as “extending direction X”, and is indicated by the X axis in FIGS. 2 to 5. Further, the positive side (+ X side, the distal end side of the arms 21 and 22) in the stretching direction X is referred to as “distal side”, and the negative side (−X side, the proximal end side of the arms 21 and 22) is referred to as “base side”. It is called "end side". The arm center axis J extends in one of the radial directions and is orthogonal to the vertical direction. The arm center axis J passes through the center axis Ax. In FIG. 2, the pair of arms 21 and 22 are parallel to each other and extend in a direction parallel to the extending direction X. In the following description of the holding unit 20, the relative positional relationship of each unit will be described assuming that the pair of arms 21 and 22 are in the state shown in FIG. 2 unless otherwise specified.

As shown in FIG. 2, the holding unit 20 holds the bag B by a pair of arms 21 and 22. FIG. 2 shows, for example, the holding unit 20 and the bag B located at the position P5. The holding unit 20 holds the bag body B with the bag opening Ba facing upward in the vertical direction. When the bag B is held by the holding unit 20, the width direction of the bag B is orthogonal to both the vertical direction and the extending direction X.
In the following description, a direction orthogonal to both the vertical direction and the stretching direction X (a direction parallel to the width direction of the bag body B in a held state) is simply referred to as “width direction Y”, and FIGS. At the Y axis. Further, in the width direction Y, a side approaching the arm center axis J is referred to as “width inside”, and a side away from the arm center axis J is referred to as “width direction outside”. The pair of arms 21 and 22 are arranged symmetrically in the width direction Y.

The arm 21 has an arm body 25, a grip 26, and an opening / closing mechanism 28.
The arm main body 25 has a cylindrical shape extending in the extending direction X, as shown in FIGS. The base end of the arm body 25 is attached to the rotating unit 30 so as to be rotatable around the rotation axis R1. A through hole 25 a extending in the extending direction X is formed in a vertically upper wall of the arm body 25.

As shown in FIG. 3, the grip 26 is provided at the tip of the arm body 25. The grip part 26 has a base part 26a and a movable part 26b. The grip portion 26 grips the bag B by sandwiching the bag B in the extending direction X between the base 26a and the movable portion 26b.
The base 26a is connected to the tip of the arm body 25. The base 26a has a base main body 26c and a contact member 27a. The base main body 26c protrudes from both sides of the arm main body 25 in the width direction Y.

  The contact member 27a is fixed with a screw on the side (+ X side) facing the movable part 26b among the ends in the width direction inner side (+ Y side in FIG. 3) of the base body 26c. The contact member 27a comes into contact with the bag B when the gripper 26 grips the bag B. As shown in FIGS. 3 and 4, in the present embodiment, the contact member 27a has a substantially rectangular parallelepiped shape elongated in the vertical direction. The contact member 27a is formed with a through hole 27h penetrating the contact member 27a in the extending direction X. A screw for fixing the contact member 27a to the base body 26c is passed through the through hole 27h.

  The surface of the contact member 27a on the opposite side (+ X side) from the base body 26c is one of the pair of gripping surfaces 27c and 27d sandwiching the bag B. The grip surface 27c faces the tip side (+ X side). As shown in FIGS. 4 and 5, a plurality of protrusions 27e are provided on the holding surface 27c. The plurality of protrusions 27e come into contact with the bag B while the gripper 26 holds the bag B.

  As shown in FIG. 4, the plurality of protrusions 27e are arranged in a lattice shape obliquely inclined at a predetermined angle θ with respect to the vertical direction. In other words, a plurality of rows constituted by a plurality of protrusions 27e arranged in the first direction D1 inclined at a predetermined angle θ with respect to the vertical direction are arranged side by side in a second direction D2 orthogonal to the first direction D1. I have. The first direction D1 and the second direction D2 are directions orthogonal to the stretching direction X and oblique to the width direction Y.

  In the present embodiment, the predetermined angle θ is 45 °. Therefore, the second direction D2 orthogonal to the first direction D1 is also a direction inclined at a predetermined angle θ (45 °) with respect to the vertical direction. A groove 27f extending in the first direction D1 is formed between rows formed by a plurality of protrusions 27e arranged in the first direction D1. The plurality of grooves 27f are formed side by side in the second direction D2. A groove 27g extending in the second direction D2 is formed between rows formed by a plurality of protrusions 27e arranged in the second direction D2. The plurality of grooves 27g are formed side by side along the first direction D1.

  As shown in FIG. 5, the protrusion 27e has a quadrangular pyramid shape whose bottom surface is on the gripping surface 27c side. More specifically, the projection 27e has a square pyramid shape with a square bottom surface. The protruding portions 27e adjacent to each other in the first direction D1 are in contact with one side of the bottom surface of the protruding portion 27e. The protruding portions 27e adjacent to each other in the second direction D2 are in contact with one side of the bottom surface of the protruding portion 27e. In the present embodiment, a plurality of protrusions 27e are spread on the gripping surface 27c except for a portion where the through hole 27h is formed.

As shown in FIG. 3, the movable portion 26b is rotatably connected to a widthwise outer end (−Y side in FIG. 3) of the base portion 26a so as to be rotatable around a vertically extending rotation axis R3. When the movable portion 26b rotates around the rotation axis R3, the grip portion 26 opens and closes. In FIG. 3, the state in which the gripper 26 is closed is indicated by a solid line, and the state in which the gripper 26 is open is indicated by a two-dot chain line. The gripper 26 grips the bag B in the closed state.
The movable section 26b has a movable section main body 26d and a contact member 27b. The widthwise outer end of the movable portion main body 26d is connected to the widthwise outer end of the base 26a so as to be rotatable around the rotation axis R3. The movable portion main body 26d extends inward in the width direction from the rotation axis R3.

  The contact member 27b is fixed with a screw to the side (−X side) facing the base 26a among the ends in the width direction inner side (+ Y side in FIG. 3) of the movable section main body 26d. The contact member 27b comes in contact with the bag B when the gripper 26 grips the bag B. The shape of the contact member 27b is similar to the shape of the contact member 27a of the base 26a. The surface of the contact member 27b on the opposite side (-X side) from the movable portion main body 26d is the other gripping surface 27d of the pair of gripping surfaces 27c and 27d that sandwich the bag B. The gripping surface 27d faces the base end side (+ X side). Although not shown, a plurality of protrusions 27e are provided on the holding surface 27d as well as on the holding surface 27c.

  In a state where the grip portion 26 is closed, the pair of grip surfaces 27c and 27d of the pair of contact members 27a and 27b face each other in the extending direction X with the bag B interposed therebetween, and sandwich the bag B. When the grip 26 is closed, the protrusion 27e of the contact member 27a and the protrusion 27e of the contact member 27b mesh with each other. Specifically, the protrusion 27e of one contact member is inserted into at least one of the groove 27f and the groove 27g of the other contact member.

  The opening / closing mechanism 28 is a mechanism that opens and closes the grip portion 26. The opening / closing mechanism 28 is provided inside the arm main body 25. The opening / closing mechanism 28 includes a shaft 28a, a link 28f, a support 28b, a base 28d, a nut 28c, a coil spring (elastic member) 28g, and an operation unit 28e.

  The shaft 28a extends in the extending direction X inside the arm body 25. The link 28f connects the end on the tip end side (+ X side) of the shaft 28a to the center of the movable portion main body 26d in the width direction Y. The support portion 28b and the base portion 28d are fitted inside the arm body 25. The base part 28d is arranged adjacent to the base end side (-X side) of the support part 28b. The support portion 28b and the base portion 28d are formed with holes through which the shaft 28a passes in the extending direction X, respectively. The base 28d is fixed to the shaft 28a by screws. The nut 28c is screwed to a proximal end of the shaft 28a. The nut 28c supports the base 28d from the base end side.

  The coil spring 28g is located inside the arm main body 25 between the support portion 28b and the grip portion 26 in the extending direction X. The coil spring 28g extends in the extending direction X. The proximal end (−X side) of the coil spring 28g is in contact with the support 28b. The distal end (+ X side) end of the coil spring 28g is in contact with the base body 26c of the gripper 26. The coil spring 28g applies an elastic force toward the base end side (−X side) to the support portion 28b and the base portion 28d. Accordingly, the shaft 28a and the link 28f receive a force on the base end side via the support portion 28b and the base portion 28d, and the contact member 27b of the movable portion 26b is pressed against the contact member 27a of the base 26a. That is, the coil spring 28g is an elastic member that applies an elastic force in a direction in which the pair of gripping surfaces 27c and 27d are pressed against each other.

  The operation unit 28e is provided outside the arm body 25 as shown in FIG. The operation unit 28e is located vertically above the through hole 25a. The operation unit 28e has, for example, a columnar shape extending in the vertical direction. The operation section 28e is fixed to the base section 28d by screws passing through the through holes 25a. The opening / closing drive unit 24 is connected to the operation unit 28e.

  The arm 22 has an arm body 25, a gripper 29, and an opening / closing mechanism 28. Thereby, the holding part 20 has a pair of grip parts 26 and 29. The gripper 29 is similar to the gripper 26 of the arm 21 except that it is symmetric in the width direction Y. The pair of holding portions 26 and 29 hold the bag B by sandwiching both ends in the width direction of the bag B. More specifically, the pair of gripping portions 26 and 29 sandwich and hold the upper end in the vertical direction among the ends on both sides in the width direction of the bag body B using a pair of contact members 27a and 27b, respectively.

  The arm drive unit 23 shown in FIG. 1 rotates the arm 21 around the rotation axis R1 and rotates the arm 22 around the rotation axis R2. In the present embodiment, the arm driving unit 23 rotates the arm 21 and the arm 22 in opposite directions around the respective rotation axes R1 and R2. That is, for example, when rotating the arm 21 clockwise about the rotation axis R1 as viewed from the upper side in the vertical direction, the arm driving unit 23 rotates the arm 21 around the rotation axis R2 as viewed from the upper side in the vertical direction. The arm 22 is rotated clockwise. Accordingly, the pair of grip portions 26 and 29 are moved by the arm driving portion 23 in a direction approaching each other in the width direction Y or in a direction away from each other in the width direction Y. That is, the arm driving unit 23 moves the pair of gripping units 26 and 29 in directions opposite to each other in the width direction Y (the width direction of the bag body B). The arm driving unit 23 may have, for example, a configuration including two motors that respectively drive the pair of arms 21 and 22 or transmit the driving force of one motor to the pair of arms 21 and 22 by a belt or the like. It may be a configuration.

  The opening / closing drive unit 24 opens and closes the opening / closing mechanism 28. As shown in FIG. 2, the opening / closing drive unit 24 has a connection unit 24a attached to the operation unit 28e. The opening / closing drive unit 24 moves the operating unit 28e to the distal end side (+ X side) via the connection unit 24a, thereby moving the base unit 28d to the distal end side against the elastic force of the coil spring 28g. As a result, the shaft 28a and the link 28f are moved to the distal end side, and the movable portion 26b rotates around the rotation axis R3 and separates from the base 26a. Thus, the opening / closing drive unit 24 can open the grip unit 26. When the drive by the opening / closing drive unit 24 is released, the shaft 28a and the link 28f are pushed toward the base end side (−X side) by the coil spring 28g, and the grip unit 26 is again closed. The opening / closing drive unit 24 has, for example, a linear actuator that is driven in the extending direction X for each of the pair of arms 21 and 22.

  The bag supply device 40 illustrated in FIG. 1 is a device that supplies the bag B to the first transfer device 10. When the bag body B is supplied by the bag supply device 40, the bag mouth portion Ba of the bag body B is in a closed state. The bag B is supplied from the bag supply device 40 to the first transport device 10 at the position P1. The bag supply device 40 sucks the bag B by, for example, a suction cup and moves the bag B to the pair of gripping portions 26 and 29. The pair of gripping portions 26 and 29 grip the bag B by being opened and closed by the opening and closing drive portion 24.

The printing device 50 is a device that prints the date on the surface of the bag B moved to the position P2.
The bag opening device 60 is a device that opens the bag mouth Ba moved to the position P2. The bag opening device 60 includes a suction cup 62 disposed on both sides of the bag B, and an air nozzle 61 disposed vertically above the bag B. The bag opening device 60 sends air from the air nozzle 61 into the bag B through the bag mouth Ba while expanding the bag mouth Ba with the suction cups 62 adsorbed on both surfaces of the bag B. Thereby, the bag body B is in a state where the bag mouth Ba is opened and the inside is expanded (a state as shown in FIG. 2). When the bag opening Ba is opened by the bag opening device 60, the pair of arms 21 and 22 are moved inward in the width direction by the arm driving unit 23. Thereby, the interval between the pair of grip portions 26 and 29 is reduced, and the bag mouth Ba can be easily opened.

  The content filling device 70 is a device that fills the bag body B held by the holding unit 20 with the content C from the bag mouth Ba. In the present embodiment, the content filling device 70 includes a solid material input device 71 and a liquid injection device 72. The solids charging device 71 is a device for charging a predetermined amount of the solids C1 into the bag B moved to the position P3. The liquid injection device 72 is an apparatus for injecting the liquid C2 into the bag B moved to the position P4.

The first sealing device 80 is a device that seals the bag opening Ba of the bag B moved to the position P6 by heat sealing. When the bag mouth Ba is closed by the first sealing device 80, the pair of arms 21 and 22 are moved outward in the width direction by the arm driving unit 23. Thereby, the interval between the pair of grip portions 26 and 29 is widened, and the bag mouth Ba is closed. In this state, the first sealing device 80 performs heat sealing by sandwiching the bag mouth Ba from both sides.
The second sealing device 90 is a device that seals the bag opening Ba of the bag body B moved to the position P7 by heat sealing, like the first sealing device 80. As described above, by performing the heat sealing twice with the first sealing device 80 and the second sealing device 90, the bag mouth Ba can be more reliably sealed.

The cooling press device 100 is a device that cools the bag mouth portion Ba of the bag body B moved to the position P8 by sandwiching the bag mouth portion Ba with a cooling bar. The bag opening Ba that has been thermally softened by heat sealing is cooled and hardened by the cooling press device 100. The bag B cooled by the cooling press device 100 is released from the holding by the holding unit 20 and placed on the second transport device 110.
The second transport device 110 is, for example, a belt conveyor. The bag body B filled with the contents C and the bag mouth Ba is sealed is sent to a predetermined position by the second transfer device 110.
The control device 120 controls each of the above-described devices, and performs an operation of filling the contents B into the bags B and packing them.

  For example, consider a case where a plurality of protrusions provided on a gripping surface are arranged in a lattice shape that is not obliquely inclined with respect to a vertical direction. In this case, the plurality of protrusions are arranged such that a plurality of rows of the plurality of protrusions arranged in the vertical direction are arranged in the horizontal direction. Therefore, a groove extending in the vertical direction is formed between rows of the plurality of protrusions arranged in the vertical direction. As a result, the bag body B easily moves in the vertical direction along the groove, and there is a possibility that a sufficient gripping force of the grip portion may not be obtained. On the other hand, for example, if the elastic force of the coil spring is increased and the grip surfaces are pressed strongly against each other, the grip force of the grip portion can be improved. However, in this case, there is a problem that the holding portion is easily worn by the load received from the coil spring, and the durability of the filling and packaging machine is reduced.

  In order to solve the above problem, according to the present embodiment, the plurality of protrusions 27e provided on the pair of gripping surfaces 27c and 27d are arranged in a lattice shape obliquely inclined at a predetermined angle θ with respect to the vertical direction. I have. Therefore, between each row of the plurality of protrusions 27e arranged in the first direction D1 and the second direction D2, grooves 27f and 27g extending obliquely to the vertical direction are formed. Since the grooves 27f and 27g formed between the respective rows of the projections 27e extend obliquely with respect to the vertical direction, a load downward in the vertical direction is applied to the bag B by the contents C. Even if it is done, it can control that bag body B is caught by slot 27f and 27g, and moves in the perpendicular direction. Thereby, the gripping force of the gripping portions 26 and 29 on the bag B can be improved without increasing the elastic force of the coil spring 28g. Therefore, the bag B can be stably held while the elastic force of the coil spring 28g is kept small. As a result, a decrease in the durability of the filling and packaging machine 1 can be suppressed. If the elastic force of the coil spring 28g is not changed, the area where the protrusion 27e is arranged can be reduced, and the contact members 27a and 27b can be reduced. Further, since the grooves 27f and 27g are also inclined obliquely with respect to the width direction Y, it is possible to suppress the bag body B from moving in the width direction Y.

Further, for example, a method of improving the gripping force by providing a rubber member on the gripping surface and improving the frictional force between the bag body B and the gripping portion may be considered. However, in this case, there is a problem that the rubber member is deteriorated and the gripping force is apt to decrease. Further, there is a possibility that a part of the deteriorated rubber member may fall and be mixed into the bag body B.
On the other hand, according to the present embodiment, as described above, the gripping force can be improved by arranging the plurality of protrusions 27e. Therefore, for example, even if a metal member having a lower frictional force with the bag body B than the rubber member is used, the gripping force can be sufficiently improved. Therefore, the durability of the grip portions 26 and 29 can be improved as compared with a case where a rubber member is used.

Further, according to the present embodiment, a plurality of protrusions 27e can be formed by performing a lattice-like groove processing on the surface of the metal member along the first direction D1 and the second direction D2. Therefore, for example, the gripping portions 26 and 29 can be manufactured easily and at low cost as compared with a case where particles such as diamond are fixed and the gripping surface is made file-shaped.
As described above, according to the present embodiment, it is possible to obtain the filling and packaging machine 1 having a structure capable of improving the durability while sufficiently securing the gripping force of the bag body B and suppressing an increase in manufacturing cost.

  Further, when a rubber member is used, or when a gripping surface is formed into a file shape by fixing particles such as diamond, the frictional force between the gripping portion and the bag body B increases in all directions. It is difficult to manually remove the bag B in the closed state. On the other hand, according to the present embodiment, since the grooves 27f and 27g extend in the first direction D1 or the second direction D2, the bag is formed along the grooves 27f and 27g in the first direction D1 or the second direction D2. The body B is relatively easy to move. Thus, for example, even if the bag B is manually removed from the grips 26 and 29, the bag B is relatively easily pulled by pulling the bag B in the first direction D1 or the second direction D2. Can be removed.

  In addition, for example, as the inclination of one of the grooves 27f and 27g increases, the inclination of the other of the grooves 27f and 27g decreases. Therefore, when the inclination of one of the grooves 27f and 27g is increased, the bag body B can be further prevented from moving in the vertical direction along one of the grooves 27f and 27g, while the movement of the grooves 27f and 27g is reduced. The bag B easily moves in the vertical direction along the other of the two. As a result, there is a possibility that the grip force of the grip portions 26 and 29 cannot be sufficiently improved as a whole.

  On the other hand, according to the present embodiment, the predetermined angle θ is 45 °. Therefore, the inclination of both the grooves 27f and 27g is set to 45 °, and the movement of the bag body B in the vertical direction can be suitably suppressed in both the grooves 27f and 27g. Therefore, the gripping force of the gripper 26 can be more suitably improved. In addition, since the inclination of the grooves 27f and 27g in the width direction Y is both 45 °, the bag body B can also be suitably suppressed from moving in the width direction Y with respect to the grip portion 26.

  Further, according to the present embodiment, the protrusion 27e has a quadrangular pyramid shape. Therefore, a plurality of protrusions 27e can be easily formed by forming a lattice-like cut in the surface of the metal member using a sharp edge.

  In addition, according to the present embodiment, the arm drive unit 23 that moves the pair of grip units 26 and 29 in directions opposite to each other in the width direction Y is provided. Therefore, as described above, the opening / closing of the bag mouth Ba can be suitably performed by moving the grips 26 and 29 in the width direction Y by the arm driving unit 23. Further, as described above, according to the present embodiment, it is possible to suppress the bag body B from shifting in the width direction Y. Therefore, the grip portions 26 and 29 can be moved in the opposite direction in the width direction Y while the bag body B is stably held. In particular, before heat sealing is performed by the first sealing device 80, the grip portions 26 and 29 are moved outward in the width direction to pull the bag body B relatively strongly in the width direction Y and close the bag mouth Ba. There is a need. Also in this case, the bag body B can be prevented from coming off from the grip portion 26 in the width direction Y, and the bag mouth Ba of the bag body B can be closed properly.

  Further, according to the present embodiment, the coil spring 28g that applies elastic force in a direction in which the pair of gripping surfaces 27c are pressed against each other is provided. Therefore, the holding force of the holding portion 26 can be improved by the coil spring 28g. Further, as described above, according to the present embodiment, the gripping force can be improved by the arrangement of the protrusions 27e. Therefore, even if the elastic force of the coil spring 28g is relatively small, a sufficient gripping force can be obtained. Therefore, even if the coil spring 28g is provided, it is possible to suppress the holding portion 20 from being worn.

Note that the present invention is not limited to the above embodiment, and the following configuration can be adopted.
The shape of the protrusion 27e is not particularly limited, and may be a pyramid other than a quadrangle, a cone, or a prism. The predetermined angle θ at which the plurality of protrusions 27e are arranged is not limited to 45 °, and may be any angle in a range larger than 0 ° and smaller than 90 °. If the protrusions 27e are arranged in a lattice shape inclined at a predetermined angle θ with respect to the vertical direction, they may be arranged at intervals on the grip surfaces 27c and 27d. The number of the protrusions 27e provided on each of the gripping surfaces 27c and 27d is not particularly limited. The contact member 27a may be a member integrated with the base body 26c. The contact member 27b may be a member integrated with the movable portion main body 26d. The elastic member may be an elastic member other than the coil spring.

If the filling and packaging machine 1 includes the holding unit 20 and the content filling device 70 (filling unit), other parts may not be appropriately provided. Further, if the holding section 20 has the grip sections 26 and 29, the arm body section 25 may not be provided. Further, the content filling device 70 may be only the solid material injection device 71 or only the liquid injection device 72. The bag B is not particularly limited, and may be a bag other than a pouch.
Note that the structures described in this specification can be combined with each other as long as they do not conflict with each other.

  DESCRIPTION OF SYMBOLS 1 ... Filling and packaging machine, 20 ... Holding part, 23 ... Arm drive part (drive part), 26, 29 ... Grip part, 27c, 27d ... Grip surface, 27e ... Projection part, 28g ... Coil spring (elastic member), 70 ... Content filling device (filling unit), B: bag, Ba: bag mouth, C: content, Y: width direction, θ: predetermined angle

Claims (5)

A filling and packaging machine that fills and packs contents into a bag having a bag mouth portion,
A holding unit that holds the bag body in a state where the bag mouth portion faces upward in the vertical direction,
A filling unit that fills the bag body held by the holding unit with the contents from the bag mouth,
With
The holding portion has a pair of gripping portions for sandwiching and gripping both ends in the width direction of the bag body,
A plurality of protrusions that are in contact with the bag are provided on a pair of gripping surfaces that sandwich the bag among the grips,
A filling and packaging machine, wherein the plurality of projections are arranged in a lattice shape obliquely inclined at a predetermined angle with respect to a vertical direction.   The filling and packaging machine according to claim 1, wherein the predetermined angle is 45 °.   The filling and packaging machine according to claim 1, wherein the protrusion has a quadrangular pyramid shape.   The filling and packaging machine according to any one of claims 1 to 3, wherein the holding unit includes a driving unit that moves the pair of gripping units in directions opposite to each other in a width direction of the bag body.   The filling and packaging machine according to any one of claims 1 to 4, wherein the holding unit includes an elastic member that applies an elastic force in a direction in which the pair of grip surfaces are pressed against each other.

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