JP6538011B2 - Sealing device for bag mouth of tetrahedral package - Google Patents

Description

  The present invention relates to an improvement technique of an apparatus for sealing a bag mouth so that a bag containing articles such as food is made tetrahedral.

  The apparatus disclosed in Patent Document 1 is proposed as an apparatus for manufacturing a tetrahedral package by sealing the opening of the bag after dividing the food such as snacks, salads, vegetables, etc. and storing it in the bag. ing. In this apparatus, the bag mouth of the bag containing the articles is directed diagonally to the side and placed on the conveyor at predetermined intervals and conveyed, and the bag mouth of the bag stopped at the sealing position is expanded up and down with the opening claw. While the bag mouth is in a flat state, the bag mouth is pressed by a holding member and inert gas is filled from the air supply nozzle. Then, after retracting the opening claw from the bag mouth to the outside, the bag mouth is sealed by sandwiching the outside from the sandwiching position of the sandwiching body with the seal bar.

  The packaging material used in the packaging by the above-mentioned device is a flat bag formed of a film material having a trade name or other predetermined print formed into a sheet-like quadrangle with a predetermined dimension, and one side of the four sides is A bag which is open and whose other three sides are sealed by a fused seal or the like is used. In the case of packaging using such a flat bag, after the articles are stored in the bag, the bag mouth is sealed so as to be sealed in the direction crossing the bottom seal portion, thereby forming four triangular surfaces. A tetrahedral package is provided. In addition, when the bag mouth is sealed, the four left and right sides of the flat bag are aligned so as to be in the same position extending left and right in the left and right sides of the bag mouth. A body-shaped package is obtained.

  In the tetrahedral package, an opening facilitating portion such as a notch is provided so as to coincide with the end of the left and right sealing portions on the bag opening side, and the left and right sealing portions positioned approximately on the perpendicular of the triangle are opened. There is also proposed a bag form or the like which is made to be a guide (e.g., Patent Document 2).

Patent No. 5271862 gazette Patent No. 3997251 gazette

  In the above apparatus, when the bag containing the articles is manually supplied to the conveyor, since the mounting posture varies and the direction of the bag opening changes at the time of sealing of the bag opening, it is sealed and obtained. There is a problem that the positions of the left and right seal parts which are supposed to be equal on the left and right do not match due to the distortion of the bag and the like. For this reason, not only the product value is greatly affected, but in the case of adopting the packaging form as in Patent Document 2, the opening position may be disturbed due to the displacement of the overlapping position of the left and right seal parts.

  Therefore, in view of the above-mentioned problems relating to the prior art, the present invention has been proposed to solve these problems suitably, and the bag mouth is well sealed without positional deviation or distortion, and the tetrahedral packaging looks good. An object of the present invention is to provide a bag-mouth seal device which can obtain a body.

In order to overcome the above-mentioned problems and achieve the intended purpose, the bag-sealing device for a tetrahedral package of the invention according to claim 1 of the present application is:
A melt-cut seal is applied to both left and right side edges sandwiching the bag mouth to store the articles , and the bag mouth is directed to one side crossing the transport direction, and the width in the transport direction as it goes from the bottom of the bag to the bag mouth The fused and sealed seal portion is positioned at the front and back of the transport direction, and the bottom opposite to the pocket is along the transport direction and the pocket is a conveyor for conveying placed portrait becomes flat to spread sideways posture open state bags, and expansion means for expanding the bag mouth of the bag to be carried in the conveyor in the vertical direction, of the bag In a sack-sealing device for a tetrahedral package provided with a sealing means for sealing a sack-mouth,
Holding for holding the bag in which the bag opening is placed in an open state in which spread vertically long flat with the opposite side of the bottom and the bag opening before Symbol bags provided at predetermined intervals on the conveyor along the conveying direction Tools,
And a bag presser which diagonally presses both edges of the bag along the seal portions of the bag held by the holder.
Even before expanding the bag mouth by the previous SL expansion means to the sealing the bag mouth by said sealing means, characterized by being configured to a state of pressing the edges of the bag in the bag retainer.
According to the first aspect of the present invention, when the bag is stably held and transported without any positional deviation or distortion in the posture of placing the bag on the conveyor, and the bag opening of the bag is expanded, Since there is no possibility of positional deviation in the holding state, the bag mouth can be flattened and sealed well without positional deviation or distortion. Therefore, when using the packaging material in which the seal portion is formed on the left and right of the flat bag, the forming line of the seal portion of the film polymerized in the left and right in the flat bag opening is displaced and the tetrahedron shape It is possible to prevent the appearance of the package from being distorted due to distortion or the like, and to prevent hindrance to opening using the seal portion as a guide.

In the invention according to claim 2, the bag presser is disposed at a position where expansion of the bag opening by the expansion means and sealing of the bag opening by the sealing means are performed when the intermittent travel of the conveyor is stopped. I assume.
According to the second aspect of the present invention, it is possible to provide a simple and simple configuration in which the bag presser is disposed at least in accordance with the operating position at the time of opening the bag opening and sealing the expanded bag opening. .

In the invention according to claim 3, a gas filling means for filling the bag with gas is provided before the sealing of the bag mouth by the sealing means,
The bag presser is characterized by including a pair of presser pieces for pressing the both edges of the bag so as not to inhibit the bag from being inflated by the gas filling into the bag by the gas filling means.
According to the third aspect of the present invention, since the bag is held down without inhibiting the expansion of the bag, the bag can be expanded and formed into a tight and well-formed shape, and the bag mouth can be sealed well.

In the invention according to claim 4, the bag presser is rotatably supported between a bag presser position for pressing both edges of the bag and a retracted position where the both edges are released and not in contact with the bag.
It is characterized in that a drive means for rotating the above-mentioned bag presser is provided.
According to the invention of claim 4, it is possible to accurately press the edge of the bag with a simple configuration.

The invention according to claim 5 is characterized in that the holder is provided with a support piece, and the bag presser is pressed against the support piece so as to hold and hold both edge portions of the bag.
According to the invention of claim 5, the edge of the bag can be reliably held by the bag presser and the support piece. In addition, the configuration of the bag presser can be simplified.

In the invention according to claim 6, the holder is placed on the lower side of the bottom receiving portion which is inclined downward from the disposition side of the sealing means on the conveyor to the opposite side and is mounted on the bottom receiving portion. A bottom support capable of supporting the bottom side of the bag and a stand-up side of the conveyor on the arrangement side of the sealing means from the bottom support stand apart at a predetermined height and separated from each other in the transport direction and placed on the bottom support A pair of inclined side walls for supporting the front and rear portions of the bag in the transport direction so that the front and rear width in the transport direction decreases as the bottom surface of the bag travels from the bottom side toward the bag mouth side;
Each inclined side wall is inclined in a direction away from the other inclined side wall from the lower side to the upper side, and the supporting piece is provided on the inclined side wall.
According to the invention of claim 6, the bottom surface of the bag placed on the base portion is supported so that the front-rear width in the transport direction becomes smaller as it goes from the bottom side toward the bag-opening side, It can be well supported without changing the shape of the bag.

In the invention according to claim 7, said retainer Oite the longitudinal conveying direction of the held bag, with a support portion of each inclined side surface which rises inclined upward from the bottom of the bag, the support portion is inclined It is characterized in that the side surface is set to support the bag mouth side higher than the bottom side.
According to the invention of claim 7, the workability when placing the bag manually on the holder is good, and the bag is made to have a predetermined shape and displaced in the holder until the bag opening is expanded and sealed. Can be held without

  According to the present invention, when the bag is stably held and conveyed without positional deviation or distortion in the posture for placing the bag on the conveyor, and the bag opening of the bag is expanded, the bag is held Since there is no possibility of positional deviation, the bag mouth can be flattened and sealed well without positional deviation or distortion.

BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part schematic side view which shows the bag-mouth sealing apparatus of the tetrahedron-like package body which concerns on an Example. It is a principal part schematic side view showing the bag control concerning an example, and an opening nail. It is a principal part schematic plan view which shows the bag presser which concerns on an Example. It is a schematic front view which shows the sealing means which concerns on an Example in the closed state of a seal | sticker bar. It is a basic drawing which makes the conveyor which concerns on an Example a horizontal state, and shows the shaping | molding state of the bag mouth in each conveyance position in a conveyor. It is operation | movement explanatory drawing which shows the various processing processes which concern on an Example.

  Next, a bag-mouth sealing device for a tetrahedral package according to the present invention will be described below by way of preferred embodiments with reference to the accompanying drawings.

  As a bag as a packaging material that can be adopted in the present embodiment, a flat bag formed into a sheet-like square shape with a predetermined dimension, and using a film material in which a predetermined name such as a trade name is given to a transparent film is used. And one side of the four sides is open, and the other three sides are provided with the seal portion heated and welded. The seal portion to be the bottom of the bag and the seal portion formed on the left and right sides of the bag are fused and sealed, or a heat-welding seal having a predetermined width in any or all of the seal portions, or JP-B-53-16756 The form described in Japanese Patent Application Publication No. Gazette and Japanese Patent Publication No. 63-50269 is adopted as necessary. In addition, in the Example, it illustrated about the case where the flat bag formed in the quadrangle was employ | adopted as a covering material. Further, as the covering material, one which has been subjected to an easy-sealing treatment (slit, perforation, half-cut treatment, weak sealing treatment for facilitating peeling of the seal portion of the film, or the like) is preferable.

  FIG. 1 shows a bag-mouth sealing device for a tetrahedral package according to an embodiment, which is an article 10 such as food mainly composed of vegetables such as salad and other various processed foods. The bag 12 containing a predetermined amount of unit is opened so that the bag mouth 12a is stretched in the vertical direction as shown in the figure so that the upper and lower sides and the four sides of the bag 12 become substantially triangular. There is provided a conveyor 16 which is placed and conveyed in an overturned posture facing one side of the conveyor in which the bag mouth 12a intersects the conveyance direction. In the conveyor 16, as shown in FIG. 3, the holders 17 are detachably attachable and replaceable according to the bag size at predetermined intervals in the traveling direction of the flat belt 16a. And the bottom side 12c of the bottom of the bag sealed at the opposite end along the conveying direction of the conveyor 16, and as the linear seal of the bag 12 a fused seal (seal) 12d facing the left and right inclined side surfaces 12f, 12f. Are mounted in the posture located in front and back of the conveyance direction of the conveyor 16. The side opposite to the side where the bag mouth 12a faces in the conveyor 16 is set as a working side for placing the bag 12 on the conveyor 16. This working side is referred to as the front side, and the opposite side is referred to as the back side. It shall be.

  As shown in FIG. 1 or 2, when the bag 12 is placed, the holder 17 is configured so that the bag mouth 12a is placed in an obliquely upward position. In the embodiment, the front side of the mounting surface of the conveyor 16 is inclined downward, and the attachment surface of the holder 17 in the conveyor 16 is disposed in an oblique shape inclined so that the back side is higher than the front side. The bag mouth 12a of the bag 12 placed at 17 is placed in an obliquely upward position. The mounting surface is supported by an angle adjustment mechanism (not shown) so as to adjust the inclination angle at which the front side of the conveyor 16 is lowered to an arbitrary angle. Further, the conveyor 16 is moved in the direction (back / front direction) intersecting the transport direction under the unlocked state by the rotation operation of the handle 32 of the position adjustment means 31, and the position of the conveyor 32 is adjusted after the position adjustment. By positioning and fixing by operation, the holding position of the bag mouth 12a by the seal bars 34 of the sealing means 26 described later can be adjusted.

  The holder 17 is formed by bending a thin plate-like material, and has a bottom receiving portion 18 attached to the mounting surface of the flat belt 16 a of the conveyor 16 and a holding portion 19 provided at an edge portion of the bottom receiving portion 18. The bottom receiving portion 18 and the holding portion 19 define an accommodation recess S which can accommodate the bottom of the bag 12. As shown in FIG. 3, the base portion 18 is formed in a substantially trapezoidal shape in a plan view, and the bottom portion 18 is disposed such that the bottom side with a short side length faces the back side of the conveyor 16. Then, in the embodiment, due to the inclination of the mounting surface of the conveyor 16, the bottom receiving portion 18 is inclined downward from the back side to the near side (from the arrangement side of the sealing means 26 in the conveyor 16 to the opposite side). The holding portion 19 is a bottom support portion 20 rising upward from the bottom side which is a long side opposite to the short bottom side of the bottom receiving portion 18 and a back side from the bottom support portion 20 (arrangement side of the sealing means 26 in the conveyor 16). The bag 12 mounted on the bottom receiving portion 18 provided with the side receiving portions 21 and 21 rising upward from the left and right inclined sides 18a and 18a in the bottom receiving portion 18 positioned, and inclined downward from the back side to the front side Is held by the holding portion 19 in a posture in which the bag mouth 12a is directed obliquely upward. Further, the bag 12 in which the bottom side 12c is supported by being in contact with the bottom support portion 20 located on the lower side of the bottom receiving portion 18 and the bottom side 12c is supported by the bottom support portion 20 is shown in FIGS. As described above, the bag mouth 12 a is configured to be held and conveyed in a state where the bag mouth 12 a extends outward from the back side of the holder 17 (conveyor 16). Further, each side receiving portion 21 has an inclined side wall 21a which is inclined to rise as it is separated outward from the inclined side 18a of the bottom receiving portion 18, and a side support portion (supporting portion extending upward from the upper end edge of the inclined side wall 21a. ) 21 b and 21 c. Then, by placing the bag 12 on the bottom receiving portion 18 so as to be fitted into the housing recess S, the bottom side 12 c of the bag 12 is supported by the bottom support portion 20 and the front and rear portions in the transport direction of the bag 12 are the bottom The bag 12 is supported by the inclined side walls 21a and 21a of the side receiving parts 21 and 21 separated left and right so as to rise upward from the side, and the bottom surface of the bag 12 placed on the bottom receiving part 18 of the holder 17 is the bottom side From this position, the width (longitudinal width in the transport direction) decreases toward the bag opening side (generally triangular), and is positioned and held so as to be substantially tetrahedral as a whole. That is, the bag 12 placed on the bottom support 18 is covered with the holding tool 17 in a range of 1/2 or more of the substantially triangular bottom surface, and the bottom side 12c and the two oblique sides 12e and 12e are held. The bag 12 is configured to maintain a substantially tetrahedral shape by being held to be covered from the outside by the bottom support portion 20 of the portion 19 and the left and right side receiving portions 21, 21.

  As shown in FIGS. 2 and 3, the inclined side walls 21a in each side receiving portion 21 are formed in a triangular shape in which the width becomes wider as going from the near side to the back side, and each inclined side wall 21a is on the lower side. Extending obliquely at a predetermined height so as to be separated from the other inclined side wall 21a as it goes upward from the bottom, the bottom surface of the bag 12 placed on the bottom receiving portion 18 goes from the bottom side to the bag opening side The front and rear portions of the bag 12 in the conveying direction are supported to be raised upward so that the longitudinal width in the conveying direction is reduced. That is, the left and right inclined side surfaces 12f rising from the oblique sides 12e and 12e corresponding to the inclined sides 18a of the bottom receiving portion 18 in the substantially triangular bottom surface of the bag 12 are supported by the inclined side walls 21a, and the bag 12 is substantially formed. It remains tetrahedral. Then, on the inclined side wall 21a, the lower end 12g of the bag 12 including the blowout seal portion 12d which rises and inclines from the bottom side 12c to the bag opening side in each inclined side surface 12f of the bag 12 placed on the bottom receiving portion 18. A support piece 21d is provided to support from the side. As shown in FIG. 3, the support pieces 21 d are provided so as to project inward at a position biased toward the bottom side of the bag 12, and sandwich both edge portions 12 g and 12 g of the bag 12 by a bag presser 69 described later. It is configured to prevent misalignment. Further, the side support portions 21b and 21c in each side receiving portion 21 are composed of a first side support portion 21b on the front side and a second side support portion 21c on the rear side, with the support piece 21d interposed therebetween. The dimension of the second side support 21c projecting from the bottom support 18 is set to be higher than that of the side support 21b. That is, the side support portions 21b and 21b are formed such that the bag mouth side is higher than the bottom side of the bag 12 placed on the bottom receiving portion 18, and the inclined side surfaces 12f of the substantially tetrahedral bag 12 are obtained. It is configured to be able to support at a higher position from the bottom side to the bag mouth side. Further, the side support portions 21 b and 21 c support the edge portions 12 g located on the inclined side surfaces 12 f of the substantially tetrahedral bag 12 from the outside.

  The conveyor 16 is placed on the holders 17 corresponding to the supply position P1 on the upstream side of conveyance, the seal position P2 at an intermediate position up to the end of conveyance, and the take-out position P3 on the downstream side of conveyance. It is configured to travel intermittently so as to sequentially stop (see FIG. 5).

  At the back side to which the bag mouth 12a of the bag 12 in the conveyor 16 is directed, the bag mouth 12a of the bag 12 reaching the sealing position P2 is vertically expanded and held flat when the intermittent travel of the conveyor 16 is stopped. A pair of opening claws (spreading means) 22, 22; an air feeding nozzle (gas filling means) 24 for filling the bag with gas; and sealing means 26 for sealing and sealing the bag mouth 12a are disposed. In position P2, the tetrahedron-like package 28 is processed by performing all the processing operations of shaping the bag mouth 12a into a flat shape, the process of filling the bag with gas, and the process of sealing and sealing the bag mouth 12a. , Also simply referred to as packaging).

  The opening claws 22, 22 are spread and extended mechanisms including an advancing and retracting mechanism for advancing and retreating between a retracted position outside the bag mouth 12a and an insertion position in the bag, and a parallel link for opening and closing the opening claws 22 and 22. It is configured to operate by an operation mechanism including a mechanism 33, and the pair of opening claws 22 and 22 are disposed so as to be able to expand and contract in the vertical direction by the expanding mechanism 33. The retracting position of the opening claws 22 and 22 is disposed at the center in the vertical direction when the bag mouth 12 a is made flat, and the opening claws 22 and 22 entering from the bag mouth 12 a spreads, so that the bag mouth 12 a is evenly distributed. It can be spread out. Moreover, the insertion site | part in the bag in the opening claws 22 and 22 cross | intersects the inclined side 12b extended in the diagonal up-down direction of the bag mouth 12a, when hold | maintaining flatly with the said opening claws 22 and 22 (FIG. They are arranged at a predetermined angle to the attachment surface of the conveyor 16 so that they are orthogonal to each other, and the amount of insertion of each opening claw 22 from the bag opening 12a toward the inside of the bag in the expanded state becomes equal. It is set up.

  An air supply nozzle 24 for filling an inert gas (gas) consisting of nitrogen or a mixed gas of nitrogen and carbon dioxide in a bag is provided integrally with the opening claw 22 on the opposite surface of the opening claws 22 and 22, respectively. The air supply nozzles 24, 24 are inserted into the bag together with the opening claws 22, 22, and the air supply holes formed at the tip end of the air supply nozzles face the inside of the bag to eject an inert gas.

  The filling amount of the gas into the bag by the air supply nozzles 24, 24 can provide at least a cushion function capable of maintaining the tetrahedral shape by expanding the bag 12 and maintaining the shape of the article 10 in the bag from external pressure and the like. It is most preferable to make it possible. In this example, since an inert gas such as nitrogen gas is used as the gas, it is recommended to use a gas barrier film as the bag material.

The sealing means 26 is held flat by the opening claws 22 prior to the sealing of the bag opening 12a by the pair of seal bars 34, 34 sandwiching the bag opening 12a for welding and sealing, and the seal bars 34, 34. There is provided a pinching means 38 having a pair of pinching members 36, 36 provided on the opposite surface with an elastic member 36a such as a sponge or a rubber material for pinching the bag mouth 12a from the left and right outside. The sealing means 26 is disposed on a moving frame 42 attached to the upper ends of a plurality of guide rods 60 provided on the machine frame 30 so as to be able to move up and down. Guide rods 60 are moved up and down by the moving mechanism, the seal bars 34 and 34, upwardly bag 12 conveyed by the conveyor 16 is not in contact with the bag 12 at the time of unloading and after sealing up to the sealing position P2 It is configured to be movable between the retracted position and the lower sandwiching position where the bag mouth 12a can be nipped from the left and right outer sides and can be sealed.

  The seal bars 34, 34 are disposed via a support member 48 provided at the tip of an arm 68 which is integrally rotated with a pair of operating shafts 66, 66 rotatably disposed in the moving frame 42. The opening / closing operation can be performed by an opening / closing mechanism (not shown) provided on the moving frame 42. With these configurations, after the pair of seal bars 34, 34 are lowered from the retracted position to the sandwiching position by the operating means consisting of the contact / separation mechanism and the open / close mechanism in the open state separated from each other, both seal bars 34, 34 It operates so as to mutually close from the open state, and holds and seals the bag mouth 12a. The seal bars 34, 34 are disposed so as to be substantially along the inclined side 12b of the bag mouth 12a held flat by the opening claws 22, 22 (see FIG. 1). In the embodiment, since the package body 28 of the regular tetrahedron is obtained from the square flat bag, each surface of the tetrahedron-shaped bag 12 remaining when the bag mouth 12a is flattened becomes an equilateral triangle, The inclined side 12 b is inclined to intersect the attachment surface of the conveyor 16 at an angle of 60 degrees. Therefore, as shown in FIG. 1, the seal bars 34, 34 are disposed so that the inclination angle α with respect to the attachment surface of the conveyor 16 is approximately 60 degrees, and the opening claws 22, 22 hold the flat shape of the bag mouth 12a. It is configured to seal the bag mouth 12a with a predetermined width along the inclined side 12b.

  In each of the support members 48, a pinching body 36 extending parallel to the seal bar 34 is disposed at a position closer to the conveyor 16 side than the seal bar 34. Each sandwiching member 36 is a spring or the like interposed between the sandwiching member 36 and the support member 48 such that the sandwiching surface of the elastic member 36a disposed on the opposite surface is held at a position projecting from the seal surface of the corresponding seal bar 34. Is urged in a direction opposite to each other by the elastic member 40 (see FIG. 4), and before the seal bars 34, 34 move to close and hold the bag mouth 12a, the bag on the bag bottom side from the planned sealing position It clamps over the whole width of mouth 12a.

  When the seal bars 34, 34 are brought close to each other, the bag mouth 12a is held by the holding members 36, 36, and then the bag mouth 12a held by the holding members 36, 36 is held by the seal bars 34, 34 Is operated to seal. With such a configuration, when the seal bars 34, 34 move in the closing direction, when holding the bag mouth 12a with the holding members 36, 36, the opening claws 22, 22 and the air supply nozzles 24, 24 with the holding members 36, 36. And at the same time, the inert gas is filled from the air supply nozzles 24, 24 and after the gas filling, the opening claws 22, 22 integrated with the air supply nozzles 24, 24 are removed from the bag opening 12a, The bag mouth 12a held by the holding members 36, 36 is held and sealed by the seal bars 34, 34.

  A bag presser 69 for pressing and holding the left and right edges 12g and 12g of the bag 12 reaching the sealing position P2 when the intermittent travel of the conveyor 16 is stopped is on the near side to which the bottom side 12c of the bag 12 in the conveyor 16 faces. It is arranged. The bag presser 69 is, as shown in FIG. 2, a bag presser position where the bag 12 carried to the seal position P2 is held by the support pieces 21d and 21d of the holder 17 and separated from the bag presser position. It is rotatably supported so as to move between it and the retracted position, and is rotated by an air cylinder 71 as a drive means. The bag presser 69 is formed in a bifurcated fork, as shown in FIG. 3, and a presser piece 70 provided at the tip of each extension is provided at a position corresponding to each support piece 21d of the holder 17. Left and right edges 12g and 12g of the bag 12 so as not to prevent the bag 12 from expanding in a tetrahedral shape when the gas is filled in the bag by the air supply nozzle 24 by the pressing pieces 70 and 70. The support pieces 21d are configured to be pressed against the support pieces 21d. In this manner, the bag presser 69 moves to the bag press position before pressing the bag opening 12a into a flat shape, presses the bag 12 against the holder 17 and holds it, and the edge portion is completed after the bag opening 12a is sealed. Release 12g and 12g and move to the retracted position. The left and right edges 12g and 12g of the bag 12 are pressed so as not to inhibit the bag 12 from expanding in a tetrahedral shape during gas filling, and the range in which the edges 12g and 12g are pressed by the pressing pieces 70 and 70 Also, it is sufficient that the position to be pressed does not inhibit the bag 12 from expanding in a tetrahedral shape with the left and right edges 12g of the bag 12 pressed by the pressing pieces 70, 70. Further, even if the strength to press the edges 12g and 12g by the pressing pieces 70 and 70 can be maintained, the position of the edges 12g and 12g can be maintained without inhibiting the bag 12 from expanding in a tetrahedral shape. Good.

[Operation of Example]
Next, the operation of the bag-mouth sealing device of the tetrahedron-like package (hereinafter referred to as a package) according to the embodiment described above will be described.

  As shown in FIG. 5, when the intermittent travel of the conveyor 16 is stopped, the bag 12 containing the articles 10 is held in the holder 17 at the supply position P1 which is the conveyance upstream of the conveyor 16. While facing the back side, the fused seal portions 12d are placed in a sideways posture in which the fused seal portions 12d are positioned in the front and back of the transport direction. The bag 12 placed on the holder 17 as shown in FIG. 2 is supported with the bag mouth 12a inclined obliquely upward so that the bottom side 12c is positioned downward, and the articles contained in the bag The holder 17 is disposed in an inclined manner in a direction intersecting the transport direction so that a space where the article 10 does not exist is defined on the bag mouth 12a side in a state of being brought close to the bottom side. Further, by positioning the bag 12 into the housing recess S of the holder 17, the bottom surface of the bag 12 is positioned and held so that the entire bag body has a substantially triangular shape with the bag mouth side at the top and a substantially tetrahedral shape in three dimensions. Be done. The left and right inclined side walls 21a and 21a of the holder 17 are inclined so as to be separated from the other inclined side walls 21a and 21a from the lower side to the upper side, so that the bag 12 supported by the inclined side walls 21a and 21a The lower sides of the left and right inclined side faces 12f, 12f are inclined upward toward the left and right outside from the blowout seal parts 12d, 12d, and left and right edges including the blowout seal parts 12d, 12d located on the left and right inclined side faces 12f, 12f. 12g and 12g are placed on the support pieces 21d and 21d. Further, the edge 12g is supported from the outside by the side support portions 21b and 21c extending upward from the inclined side walls 21a, so that the edge 12g is maintained in the state of being placed on the support piece 21d. . The bottom side 12c of the bag 12 is supported by the bottom support portion 20, and the bag mouth 12a is held in an obliquely upward position, and the bag mouth 12a has a predetermined length outwardly from the back side of the holder 17 (conveyor 16). It will be in the state extended only a little (refer FIG. 3).

  When the bag 12 is placed at the supply position P1 by the inclination of the holder 17, or the article 10 stored in the bag 12 is transported from the supply position P1 to the seal position P2, the article 10 is located near the bag opening or outside the bag opening 12a. Spillage can be suppressed, and problems such as a change in the internal volume or a seal failure when the contents of the bag mouth 12a are sealed can be prevented. Further, since the bag 12 is fitted into the housing recess S of the holder 17, the bag 12 can be stably held and transported without positional deviation or distortion in the posture of the bag 12 placed on the holder 17. The bag mouth 12a of the bag 12 conveyed to the sealing position P2 can be made to face the opening claws 22 and 22 and the sealing means 26 at an appropriate position. In addition, since the holder 17 is inclined so that the front side is low so that the bag 12 can be held in an inclined posture, the operation when manually mounting the bag 12 on the holder 17 from the front side of the conveyor 16 Good sex. Furthermore, in the side support portions 21b and 21c of the holder 17, in the substantially tetrahedral bag 12, the inclined side surface 12f whose rising width increases from the bottom side to the bag opening side is increased according to the rising width. Since the bag mouth side is supported at a higher position than the bottom side, the bag 12 can be stably held when the bag mouth 12 a is sealed.

  When the bag 12 arrives at the seal position P2 and the traveling of the conveyor 16 is intermittently stopped, the air bag 71 moves the bag presser 69 from the retracted position to the bag presser position, and the left and right edges 12g, 12g of the bag 12 The support pieces 21d of the holder 17 are pressed. After completion of pressing the left and right edges 12g, 12g of the bag 12 by the bag presser 69, the opening claws 22, 22 are inserted into the bag and separated from each other (see FIG. 6A). Is expanded up and down and held flat. Further, the opening claws 22 and 22 and the air supply nozzles 24 and 24 inserted into the bag are sandwiched by the sandwiching members 36 and 36 and temporarily stopped (see FIG. 6B), and from the air supply nozzles 24 and 24 Inert gas is blown out and filled in the bag.

  After the opening claws 22, 22 and the air supply nozzles 24, 24 retract to the outside of the bag mouth 12a, the bag mouth 12a outside the holding position held by the holding members 36, 36 is a seal bar 34, 34. Can be obtained (see FIG. 6 (c)) to obtain a package 28 in which the bag mouth 12a is obliquely sealed. Further, after the sealing of the bag mouth 12a is completed, the air bag 71 is moved toward the retracted position by the air cylinder 71, and the delivery of the obtained package 28 from the sealing position P2 is permitted.

  As shown in FIG. 1, at the sealing position P2, the bag 12 is supported in a state where the bag mouth 12a is inclined in an obliquely upward posture, and the article 10 inside is in a biased state toward the bottom side. At the time of sealing, the article 10 is not pinched and sealed by the seal bars 34, 34. Further, since the bag mouth 12a is not extended and supported outward from the holder 17 (the conveyor 16), the bag mouth 12a can be favorably expanded by the opening claws 22 and 22. And the bag mouth 12a can be made flat and good sealing can be performed without producing wrinkles.

  Then, when the obtained package 28 is carried out downstream from the sealing position P2, the seal bars 34 and 34 and the bag presser 69 move to the retracted position, so that the package 28 comprises the seal means 26 and the bag presser 69 It is taken out of the conveyor by the operator picking up at the taking out position P3 on the conveyor 16 without contact.

  As described above, in the present example, the bag mouth 12a of the bag 12 is expanded vertically to make the bag mouth 12a flat and the bag mouth 12a is sandwiched from the outside and sealed. Since the left and right edges 12g, 12g are pressed against the holder 17 so as not to be displaced, the fused seal portion of the film that is polymerized on the left and right when the bag opening 12a of the bag 12 is flattened in the vertical direction Misalignment of the forming lines 12d and 12d can be prevented, which can prevent the appearance of the package 28 from being degraded. In particular, in the case of using the covering material in which the opening guide portion is formed at the upper end following the melting and cutting sealing portions 12d and 12d in the bag mouth 12a, it is possible to prevent the polymerization deviation of the opening guiding portion. , 12d is well conducted. In addition, since the left and right edges 12g, 12g of the bag 12 are sandwiched between the bag presser 69 and the support pieces 21d provided on the holder 17, the entire bag is extended from the opening of the bag opening 12a to the seal. Can be held securely without misalignment.

  The bag presser 69 is disposed to be able to press the bag 12 that has reached the seal position P2. Therefore, the apparatus can be simplified and the manufacturing cost can be reduced. Further, since the conveyor 16 is configured to be adjustable in inclination angle and position in the back and front direction, the inclination angle and position adjustment in the back and front direction of the conveyor 16 are performed according to the size of the bag placed on the holder 17. Thus, the bag mouth 12a can be properly sealed by the sealing means 26.

  Further, when the sealing means 26 is retracted from the bag mouth 12a and the bag 12 is carried out from the sealing position P2 to the taking out position P3, the left and right edges 12g, 12g of the bag mouth 12a are pressed against the holder 17. Unloading of the package 28 is permitted by releasing the pressing of the existing bag presser 69 and moving it toward the retracted position. Further, since the bag presser 69 swings between the retracted position and the bag presser position, the left and right sides of the bag 12 can be carried out with a simple configuration without obstructing the carrying in of the bag 12 to the seal position P2 and the carrying out of the package 28. Edges 12g and 12g can be pressed.

(Modification example)
The present invention is not limited to the configuration of the embodiment, and can be modified as follows, for example. Moreover, various embodiments can be adopted within the scope of the present invention as to the configurations described in the examples, not limited to the following modifications.
(1) In the embodiment, in the embodiment, the flat belt 16a is inclined and the attachment surface of the holder 17 is inclined so that the operator inclines the front side on which the bag 12 is placed on the holder 17. However, instead of such a configuration, at least the bag 12 housed in the holder 17 is inclined, such as adopting a configuration in which the holder 17 itself can be housed and held in a posture in which the bag 12 is inclined. It may be configured appropriately to be held in posture.
(2) Although one bag presser 69 is disposed at the seal position P2, it may be provided corresponding to each of the holders 17.
(3) Although the expansion of the bag mouth 12a and the sealing of the bag mouth 12a are performed at the same position, each process may be performed at different stop positions, and the bag presser 69 may be respectively adjusted accordingly. The configuration provided at the position of
(4) As for the holder 17, a plurality of kinds of holders 17 adapted to different kinds of bag sizes may be prepared, and the holder 17 may be attached to and removed from the conveyor 16 when changing the bag size. .
(5) It is possible to prepare an adapter by bag size adapted to different types of bag sizes, and attach and detach the adapter to and from the holder 17 when changing the bag size.
(6) Although the holder 17 has the bottom receiving portion 18 on which the bag 12 is placed, the holder 17 includes the bottom support portion 20 for supporting the bottom side 12 c of the bag 12 and the conveying direction of the bag 12. For example, it may be provided with a pair of inclined side walls 21a and 21a that support the front and rear portions to rise, for example, the mounting surface of the conveyor 16 as the bottom receiving portion is mounted on the bottom receiving portion (mounting surface) Other configurations may be employed such as supporting the bottom side 12c and the front and rear portions of the bag 12 with the bottom support portion 20 of the holder 17 and the inclined side walls 21a and 21a and holding it in a substantially tetrahedral shape.

(7) The operation mechanism of the bag presser 69 is not limited to the rotation type, and a vertical movement method, a parallel link method, and other appropriate operation mechanisms can be adopted.
(8) Although the air cylinder is employed as the drive means of the bag presser 69, a motor or other known drive means may be employed. In addition, various mechanical operating mechanisms such as a cam lever system may be adopted in which the bag presser 69 presses the edge 12g of the bag 12 when each holder 17 is positioned at the seal position P2. Good.
(9) Although the configuration is adopted in which the edge portion 12g of the bag 12 is sandwiched and positioned by the bag pressing member 69 and the holder 17 (supporting piece 21d), for example, the bag pressing member 69 and the receiving portion separately provided on the conveyor 16 Other configurations may be employed such as positioning with the 12 edges 12g and 12g in between.

DESCRIPTION OF SYMBOLS 10 articles, 12 bags, 12a bag mouth, 12c bottom side, 12e oblique side, 12f inclined side surface 16 conveyor, 17 holder, 19 holding portion, 21a inclined side wall 21b first side support portion (support portion), 21c second side support portion (Support part), 21d Support piece 22 Opening claw (expansion means), 24 Air supply nozzle (gas filling means), 26 Seal means 69 Bag holder, 70 Presser piece, 71 Air cylinder (drive means), P2 Seal position

Claims (7)

Fused seals are applied to the left and right sides of the bag mouth (12) to accommodate the articles (10) , and the bag mouth (12a) faces one side intersecting the transport direction and the bag (12) The fused (sealed) sealed portions (12d, 12d) are positioned in the front and back of the transport direction in the bag (12) whose front and rear width in the transport direction becomes smaller as it goes from the bottom to the port (12a). The bag (12) is placed on its side in the open position with the bag mouth (12a) spread in a vertically long flat shape and the bottom side opposite to the bag mouth (12a) along the transport direction a conveyor (16) which is conveyed, the bag mouth of the bag (12) carried by said conveyor (16) and widening means for widening a (12a) in the vertical direction (22, 22), said bag (12 And a sealing means (26) for sealing the mouth (12a) of the tetrahedron package,
Said conveyor (16) before SL bag provided at predetermined intervals (12) the bag mouth in (12a) and said bag opening opposite the bottom (12c) together with along the transport direction (12a) is vertically long flat A holder (17) for holding the bag (12) placed in an open state in which
Wherein each seal of the bag (12) held in said holder (17) (12d, 12d) both edges of the bag (12) along the (12 g, 12 g) bag retainer (69) for pressing the diagonally Equipped with
The pre-Symbol expanding means (22, 22) before the expanding bag mouth and (12a) to seal the bag inlet to (12a) by said sealing means (26), said bag bags retainer (69) (12 A seal device for a bag-mouth seal of a tetrahedral package characterized in that both edge portions (12g, 12g) of the above are pressed down .   The bag presser (69) is an opening of the bag opening (12a) by the expansion means (22, 22) when the intermittent travel of the conveyor (16) is stopped and a bag opening (12a) by the sealing means (26). 2. The bag-mouth sealing device for a tetrahedron-like package according to claim 1, wherein the bag-sealing device is disposed at a position (P2) where the sealing is performed. Before the sealing of the bag mouth (12a) by the sealing means (26), gas filling means (24) for filling the bag with gas is provided.
The bag presser (69) does not inhibit the bag (12) from inflating due to the gas filling into the bag by the gas filling means (24), and both edges (12g, 12g) of the bag (12) 3. The bag-mouth sealing device for a tetrahedron-like package according to claim 1 or 2, further comprising a pair of pressing pieces (70, 70) for pressing the. The bag presser (69) has a bag presser position for pressing both edges (12g, 12g) of the bag (12) and a retracted position where the both edges (12g, 12g) are released and do not contact the bag (12). Supported between them,
4. The bag-mouth sealing device for a tetrahedron-like package according to any one of claims 1 to 3, further comprising a drive means (71) for rotating the bag presser (69).   A support piece (21d, 21d) is provided on the holding tool (17), and the bag presser (69) is pressed against the support piece (21d, 21d) to sandwich both edges (12g, 12g) of the bag (12) The bag-mouth seal device of the tetrahedron-like package according to any one of claims 1 to 4, which is configured to be held. The holder (17) is located on an inclined lower side of the bottom receiving portion (18) which descends from the disposition side of the sealing means (26) on the conveyor (16) to the opposite side, and the bottom receiving portion Bottom support (20) capable of supporting the bottom side (12c) of the bag (12) placed on (18), and arrangement of the sealing means (26) in the conveyor (16) from the bottom support (20) The front and rear sides of the bag (12) placed on the bottom receiving portion (18) rise from the bottom side to the bag opening side and the front-rear width in the transport direction is And a pair of inclined side walls (21a, 21a) for supporting the bag (12) so that the front and rear portions in the conveying direction rise upward.
Each inclined side wall (21a) is inclined in a direction away from the other inclined side wall (21a) from the lower side to the upper side, and the support pieces (21d, 21d) are provided on the inclined side wall (21a, 21a) The bag-mouth seal device for a tetrahedral package according to claim 5, characterized in that: Wherein the retainer (17), Oite the longitudinal conveying direction of the held bag (12), each inclined side surface (12f, 12f) which rises inclined upward from the bottom of the bag (12) of the support portion (21b, The support portion (21b, 21c) is set to support the inclined side surface (12f, 12f) at a position where the bag side is higher than the bottom side. A bag-mouth seal device for a tetrahedral package according to any one of the preceding claims.

Images