JP6920733B2 - Pillow wrapping machine - Google Patents

Description

The present invention relates to a pillow packaging machine, and is suitable for manufacturing a package in a packaging form in which the center seal portion is opened to the left and right to open the package.

Patent Document 1 describes a method for producing sweet bread, in which cream or the like to be applied to bread dough is pillow-wrapped in a plate shape, the center seal portion is opened to the left and right to open the package, and then the dough is turned over and placed on the bread dough. When the center seal portion 8 is formed by sealing both ends of the wrapping film 5 made into a tubular shape, the package 23 manufactured by the pillow packaging does not seal on the outside of the center seal portion 8. A portion 9 is formed, and the overhanging portion 9 is opened and top-sealed in a direction orthogonal to the conveying direction of the packaging film 5 (see FIG. 1).

Since the package 23 in this manner is top-sealed with the tip side open to the left and right from the center seal portion 8, there are overhanging portions 9 on both sides of the center seal portion 8. Therefore, the package can be easily opened by grasping both of the overhanging portions 9 with both hands and pulling them in the direction of separating them to the left and right.

Special fair 6-62131

However, depending on the film, the overhanging portion 9 formed on the tip end side of the center sealing portion 8 may curl as shown in FIG. 1 (c). Then, the curled portion is sandwiched from both sides by a pair of top sealers and top-sealed in a crushed state. As a result, the finish of the top seal portion 10 is deteriorated. Further, if the package 23 is curled, the appearance of the package 23 will be deteriorated, and there will be a problem that it will be difficult to grasp the package 23 at the time of opening.

The above-mentioned problems are described as independent of each other, and the present invention does not necessarily have to be able to solve all of the described problems, as long as at least one problem can be solved. In addition, we have the intention to acquire the rights to the structure for solving this problem independently by divisional application, amendment, etc.

In order to solve the above-mentioned problems, the pillow wrapping machine of the present invention is (1) a bag-making machine that makes a continuously supplied strip-shaped wrapping film into a tubular shape, and a tubular-shaped bag-making machine. A center seal device that applies a center seal to the root side while leaving the tip end unsealed with respect to both side edge portions of the overlapped packaging film, and the both sides that are arranged and overlapped on the downstream side of the center seal device. A pillow wrapping machine provided with an opening means for separating and opening the tips of the edge portions and a top sealing device arranged on the downstream side of the opening means for sealing and cutting the wrapping film in the width direction. there are, disposed between the center seal unit and the bag unit, e Bei the stiffness enhancing means increasing the stiffness of the film with the irregularities on the tip by sandwiching the both side edges from both sides, the uneven Is a vertical grain formed so that linear portions extending in a direction orthogonal to the transport direction of the film are lined up in the transport direction .

In this way, of the both side edges of the wrapping film made into a tubular bag, the unsealed overhanging portion on the tip end side of the center sealing portion is stiffened, and the film is less likely to curl. Therefore, the open state is maintained by the opening means and the top seal is formed as it is, so that the finish of the top seal is good. Further, in order to improve the finish of the top seal, the uneven formation region may be formed at least in the top seal portion and the peripheral portion thereof, and may not be formed over the entire length of the center seal portion as in the embodiment. good. Also. It is preferable to form the package over the entire length of the center seal portion because the overhanging portion can be suppressed from curling over the entire length of the center seal portion, and the appearance and appearance of the package are improved.

By making it vertical, a linear concave / convex portion is formed in a direction that suppresses the curling direction, so that it becomes more difficult to curl and the overhanging portion is easily extended to maintain an open state.

(2) The stiffening means is a pair of pressure rollers, and it is preferable that vertical stitches extending in the axial direction are formed on the peripheral surface of the pressure rollers in contact with the film. In this way, vertical stitches can be formed with a simple structure, which is good. Although the pressure roller is a free roller separated from the drive source in the embodiment, the function of a pinch roller may be added.

(3) The unevenness may be formed in a region that does not reach the tip edges of the both side edge portions. In this way, the tip edge of the overhanging portion becomes flat, the appearance is beautiful, and the strength does not decrease without waviness in the direction along the center seal portion.

In the present invention, by making the overhanging portion uneven, the stiffness of the overhanging portion becomes stronger and the overhanging portion is less likely to curl. As a result, for example, the finish of the top seal can be improved.

An example of a package is shown. It is a front view which shows one preferable embodiment of the pillow packaging machine which concerns on this invention. It is the plan view. It is an enlarged front view which shows the center seal device and the part around it. It is an enlarged plan view which shows the center seal device and the peripheral part. It is a figure explaining an action and the like. It is an enlarged front view which shows the stiffening device which becomes the main part of this invention, and the peripheral part. It is an enlarged plan view which shows the stiffening device which becomes the main part of this invention, and the peripheral part. (A) is a perspective view showing a part of the package, (b) is a cross-sectional view taken along the line bb in (a), and (b) is a line arrow cc in (a). It is a cross-sectional view of a view, and FIG. 1D is an enlarged view showing a portion d in (a).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not construed as being limited to this, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

2 and 3 show a preferred embodiment of the pillow wrapping machine according to the present invention. The pillow wrapping machine is arranged on the upstream side of the wrapping machine main body 1, the film supply device 2 that continuously supplies the strip-shaped wrapping film 5 to the wrapping machine main body 1, and the wrapping machine main body 1. It is provided with a packaged object transporting and supplying device 4 that supplies the packaged object 3 to the main body 1 at predetermined intervals. The packaged object 3 is, for example, a flat sheet-shaped article. The article is, for example, butter, which is relatively hard and does not lose its shape even when transported in the horizontal direction. Moreover, the thickness is uniform throughout.

The film supply device 2 links the output of a drive motor (a motor whose speed can be controlled such as a servomotor) (not shown) to the original roll 6 in which the strip-shaped packaging film 5 is wound into a roll, and the original roll It is supplied to the packaging machine main body 1 at a constant speed while appropriately controlling the rotation speed of 6. Further, various rollers 7 are arranged at predetermined positions from the raw fabric roll 6 to the packaging machine main body 1, and the strip-shaped packaging film 5 sent out from the raw fabric roll 6 is hung on the rollers 7 to be predetermined. It is guided to the packaging machine main body 1 through the route of. In the present invention, it is not always necessary to link the drive motor to the original roll 6, and a feed roller may be provided on the transport path of the packaging film to pull it out. The film supply device 2 is arranged below the wrapping machine main body 1 and supplies the wrapping film 5 from below.

The packaged object transporting and supplying device 4 is composed of a belt conveyor, a finger conveyor, and the like, and supplies the packaged object 3 to the packaging machine main body 1 at a predetermined timing and at regular intervals.

The wrapping machine main body 1 has a bag making device 15 on the carry-in side of the object to be packaged 3 and the strip-shaped wrapping film 5. The bag-making device 15 passes the strip-shaped wrapping film 5 continuously supplied from the film supply device 2 to contact and polymerize the edge portions 5a on both sides of the wrapping film 5 to form a tubular bag. .. Further, the packaged object 3 sequentially supplied from the packaged object transporting and supplying device 4 to the packaging machine main body 1 is sent into the bag making device 15. As a result, the object to be packaged 3 supplied to the bag making device 15 is arranged at predetermined intervals in the packaging film 5 which is made into a tubular bag. Further, since the wrapping film 5 is supplied from the lower side, both side edge portions 5a are located on the upper side of the wrapping film 5 which is made into a tubular bag.

On the downstream side of the bag making device 15, a belt conveyor 16 that conveys the packaging film 5 that has been made into a tubular bag with the object to be packaged 3 contained therein is arranged. An upper restraining belt 18 is arranged above the vicinity of the carry-out side of the belt conveyor 16, and a center seal device 17 is arranged on the upstream side of the upper restraining belt 18. Further, the top seal device 20 and the unloading conveyor 19 are arranged in this order on the downstream side of the belt conveyor 16, and the holding member 14 is arranged on the top sealing device 20 side above the unloading conveyor 19.

The center sealing device 17 seals both side edge portions 5a of the polymerized packaging film 5 along the traveling direction. The center sealing device 17 heat-seals the packaging film 5 by heating the packaging film 5 while sandwiching the edge portions 5a on both sides from both sides. More specifically, as shown in FIGS. 4, 5 and the like, the center seal device 17 has a pair of pinch rollers 17a that sandwich a portion where the both side edge portions 5a are overlapped and give a conveying force, and the overlap thereof. A pair of square bar-shaped bar sealers 17b that sandwich the combined parts from both sides and heat-seal them, and a pair of press rollers 17c that pressurize the overlapped parts of the side edges of the film that is placed immediately after the bar sealers 17b and heated and melted. And a pair of pinch rollers 17d arranged on the downstream side of the press roller 17c. The peripheral surface of the pinch roller 17d has a predetermined seal. Further, in the present embodiment, a center sealer composed of a square bar-shaped bar sealer 17b, a pinch roller 17d, or the like is used, but it is also possible to use a roller-type center sealer having a built-in heater arranged on the left and right sides of both side edge portions 5a. good. The roller type heats and pressurizes.

Since the pinch roller 17d rotates synchronously with the center seal portion sandwiched at a predetermined pressure, a conveying force is applied to the center seal portion and thus the tubular packaging film 5.

Further, in the present embodiment, the press roller 17c and the pinch roller 17d arranged on the downstream side of the bar sealer 17b are in contact with the root side of the overlapped both side edge portions 5a and are not in contact with the tip portion 5a'. The position is adjusted so that As a result, the center seal portion 8 that is heat-sealed and adhered by passing through the pinch roller 17d is formed on the root side of both side edge portions 5a, and the tip side of the center seal portion 8 of both side edge portions 5a is formed. , An unsealed overhanging portion 9 is formed. Therefore, the overhanging portion 9 becomes a free end and can be separated from each other.

On the downstream side of the center seal device 17, an opening member 25 for opening the overhanging portion 9 is arranged. The opening member 25 is inserted between the two overhanging portions 9 of the both end edge portions 5a toward the downstream side from the installation section of the pinch roller 17d (see FIG. 6A), and gradually toward the downstream side. It has a wide outer shape. The double overhanging portions 9 are guided by both side surfaces of the opening member 25 and are displaced so as to gradually fall outward, and when reaching the top sealing device 20, the angle formed by the double overhanging portions 9 opens at approximately 180 degrees. , The surface of the main body portion 5b of the tubular packaging film 5 is substantially parallel to the surface (see FIG. 6B).

The upper holding belt 18 is arranged on the downstream side of the opening member 25. The upper holding belt 18 suppresses the object to be packaged 3 in the packaging film 5 from being lifted upward so that the object 3 can be conveyed while maintaining the horizontal state. Further, the double overhanging portion 9 opened by the opening member 25 is conveyed in a state of facing the belt surface of the upper holding belt 18 in an open state.

The top sealing device 20 seals and cuts the tubular packaging film 5 in a direction orthogonal to the traveling direction, that is, in a direction crossing the film. The top seal device 20 of the present embodiment is a drive for a pair of top sealers 21 and 22 arranged vertically to revolve in a predetermined trajectory while maintaining a state in which the seal surfaces 21a and 22a face each other. Equipped with a mechanism. Both top sealers 21 and 22 operated by this drive mechanism move closer to each other from reference positions separated by a predetermined distance and sandwich the packaging film 5 from above and below to determine film portions in contact with the sealing surfaces 21a and 22a. Pressurize and heat at the pressure of. Then, both the top sealers 21 and 22 move forward with each other along the moving direction of the wrapping film 5 while maintaining the state of being close to each other and sandwiching the wrapping film 5 as described above. The moving speed at this time is equal to the moving speed of the packaging film 5. When both the top sealers 21 and 22 move by a predetermined distance, they move apart from each other and move in the direction opposite to the moving direction of the packaging film 5 to reach the reference position.

The top sealers 21 and 22 have a built-in cutter blade, and the cutter blade operates in a state where the sealing surfaces 21a and 22a are in contact with each other to cut the packaging film 5. As a result, the head of the tubular packaging film 5 containing the object to be packaged 3 is cut, the top seal portion 10 is formed, and the package 23 is manufactured. The manufactured package 23 is carried out by the carry-out conveyor 19.

Further, when the wrapping film 5 is intermittently moved and the movement of the wrapping film 5 is temporarily stopped with the film portion between the front and rear objects to be packaged located between the two top sealers 21 and 22, both top sealers. 21 and 22 may approach and separate from each other to perform the seal cutting process. In such a case, the top seal device may be configured such that the top sealer does not move forward and backward but only moves up and down.

Here, in the present embodiment, the firming device 26 is arranged between the bag making device 15 and the center seal device 17. As shown in FIGS. 7, 8 and the like, the stiffening device 26 is arranged immediately after the downstream side of the bag making device 15 in the present embodiment. The firming device 26 includes a pair of pressure rollers 27. The pair of pressure rollers 27 have a rotating shaft 27a extending upward from the center of the upper surface, and the rotating shaft 27a is rotatably supported by a bearing portion (not shown). Then, on the peripheral surface 27b of the pressure roller 27, the overlapped both side edge portions 5a are sandwiched from the left and right sides with a predetermined pressure. Since the pair of pressure rollers 27 are supported by bearings in a free state, when the edge portions 5a on both sides move forward as the packaging film 5 is conveyed, the pair of pressure rollers 27 also rotate accordingly, and both sides. Allows forward movement of the edge portion 5a. Further, the peripheral surface 27b of the pressure roller 27 is formed with vertical meshes in which ridges and concave grooves extending in the vertical direction parallel to the rotation shaft 27a are alternately arranged in the circumferential direction. Then, in a state where both side edge portions 5a are sandwiched between the pair of pressure rollers 27, the ridges formed on the peripheral surface 27b of one pressure roller 27 and the peripheral surface 27b of the other pressure roller 27 are formed. The concave groove meshes with each other to sandwich the both end edge portions 5a and pressurize.

As a result, the portion of the edge portions 5a on both sides that is in contact with the unevenness (concave groove / ridge) of the peripheral surface 27b of the pressure roller 27 is deformed into a shape that matches the unevenness, and a mark corresponding to the unevenness is formed. Is attached. Therefore, linear recesses (convex portions) extending in a direction orthogonal to the film transport direction, that is, extending from the root side to the tip of both side edge portions 5a, are formed so as to line up in the transport direction. As a result, vertical stitches are formed at predetermined portions of the overlapped both side edge portions 5a, and the film becomes firmer. Moreover, since the unevenness formed on the film is vertical, it is in a state of being taut from the root side to the tip side of both side edge portions 5a.

Further, in the present embodiment, it is formed not as a whole but as a part of both side edge portions 5a. Specifically, it is not formed at the root and the tip edge, but is formed at the intermediate portion. Since the root portion is a portion to be center-sealed by the center-sealing device 17 located on the downstream side as described above, it is not necessary to add unevenness to strengthen the stiffness, so that the root portion is not formed. In addition, by not forming the tip edge side, the tip edges of both side edge portions 5a are connected in a flat state along the transport direction of the film, and the strength is increased and the film is wavy in the direction along the transport direction. The overhanging portion 9 is clean and easy to hold.

Further, in the present embodiment, two sets of a pair of pinch rollers 29 are arranged between the firming device 26 and the center sealing device 17, and both side edge portions 5a having vertical stitches are sandwiched from the left and right sides. To give a conveying force to both side edge portions 5a and thus to the packaging film 5.

According to the present embodiment, the both side edge portions 5a that have passed through the bag making device 15 and are overlapped with each other have irregularities (here, vertical stitches) formed by the stiffness setting device 26, and the stiffness becomes stronger and the tip is from the root side. It moves toward the portion side in a taut state and reaches the center seal device 17. When both side edge portions 5a pass through the center seal device 17, the root portions of both side edge portions 5a are heat-sealed to form the center seal portion 8, but the tip end side of the center seal portion 8 is pressurized. However, unevenness (here, vertical stitches) remains formed on the overhanging portion 9. After that, the overhanging portion 9 on which the unevenness is formed falls and spreads to the left and right by passing through the opening member 25 (see FIG. 6B).

The overhanging portion 9 in the collapsed open state has a large number of linear concave portions / convex portions extending from the root side toward the tip portion, is strong, and has a taut tip edge without curling and curling. The state is maintained and the state is supplied to the top seal device 20 as it is. Therefore, in the top sealing device 20, when the top sealers 21 and 22 sandwich and seal the packaging film 5, they also sandwich the overhanging portion 9 in the open state, but since the overhanging portion 9 is not curled, the vicinity of the center sealing portion 8 Can be top-sealed neatly without becoming extremely thick.

Then, as shown in FIG. 9, the package 23 manufactured with the overhanging portion 9 being stiff is in a state in which the overhanging portions 9 are neatly opened on both sides of the center seal portion 8. Therefore, when the user has the left and right overhanging portions 9 and pulls them in the directions away from each other, the package 23 is opened so as to be peeled off from the center seal portion 8 and the packaged object 4 can be taken out. Actually, as disclosed in Patent Document 1, for example, the package 23 is turned upside down on the article on which the packaged object 4 is placed so that the packaged object 4 faces the object. In that state, the object to be packaged 4 is dropped, transferred onto the object, and placed on the object. Further, according to the pillow package of the present embodiment, the overhanging portion 9 extends without curling, so that it is easy to pinch with fingers.

In the above-described embodiment, in the stiffening device 26, ridges and concave grooves extending in the vertical direction are formed on the peripheral surfaces 27b of the pair of pressure rollers 27, and vertical grain is provided on both side edge portions 5a. However, the present invention is not limited to this, and for example, the unevenness of various forms such as horizontal grain and grain may be formed, and the unevenness of the various patterns may be formed on both side edge portions 5a. However, it is preferable to form vertical stitches as in the embodiment because the tip side has the strongest stiffness in the direction of suppressing curling toward the root side. Further, in the above-described embodiment, the unevenness formed on both side edge portions 5a and thus the overhanging portion 9 is prevented from reaching the tip edge, but the tip edge may be formed. However, as in the embodiment, it is preferable that the tip edge is not reached and the tip edge is flat.

Furthermore, in the above-described embodiment, the packaged object transporting and supplying device 4 is provided so that the packaged object is transported and automatically supplied to the bag making device 15, but the present invention is not limited to this and is manually performed. It may be supplied.

Although various aspects of the present invention have been described above with reference to embodiments and modifications, these embodiments and descriptions have not been made for the purpose of limiting the scope of the present invention, and are intended for understanding the present invention. It should be added that it was provided to contribute. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described herein, but also includes combinations of various aspects of the invention disclosed herein. Of the present invention, the configuration for which a patent is sought is specified in the appended claims, but even if the configuration is not currently specified in the claims, it is disclosed in the present specification. I would like to mention that there is a possibility of claiming a patent for this configuration in the future.

1: Packaging machine main body 2: Film supply device 3: Packaged object 4: Packaged object transport supply device 5: Packaging film 5a: Both side edge portions 5a': Tip portion 5b: Main body portion 8: Center seal portion 9: Overhang Part 15: Bag making device 17: Center sealing device 20: Top sealing device 23: Packaging body 25: Opening member 26: Stiffening device 27: Roller 27b: Peripheral surface

Claims (3)

A bag maker that makes a tubular wrapping film that is continuously supplied, and a bag maker.
A center seal device that applies a center seal to the root side while leaving the tip end unsealed with respect to both side edge portions of the packaging film that are made into a tubular shape and overlapped.
An opening means arranged on the downstream side of the center sealing device and opening by separating the tip portions of the overlapped both side edge portions from each other.
A pillow wrapping machine provided with a top sealing device, which is arranged on the downstream side of the opening means and seals and cuts the wrapping film in the width direction.
Disposed between the center seal unit and the bag unit, e Bei the stiffness enhancing means increasing the stiffness of the film with the irregularities on the tip by sandwiching the both side edges from both sides,
The pillow wrapping machine is characterized in that the unevenness is a vertical grain formed so that linear portions extending in a direction orthogonal to the transport direction of the film are lined up in the transport direction. The stiffening means is a pair of pressure rollers.
The pillow wrapping machine according to claim 1, wherein vertical stitches extending in the axial direction are formed on the peripheral surface of the pressure roller in contact with the film. The pillow wrapping machine according to claim 1 or 2, wherein the unevenness is formed in a region that does not reach the tip edges of the edge portions on both sides.

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