JPH06127513A - Wrapping machine - Google Patents

Abstract

PURPOSE:To improve accuracy of folding down of protruding parts of wrapping paper that is wound round a packaging body, and to make such method of folding applicable to packaging bodies in various sizes. CONSTITUTION:Edge-folding units U11-U14, U21-U24, corresponding to each of corners of a packaging body 20 that is wrapped up with wrapping paper 21, are arranged, and edges of protruding parts 22 of the wrapping paper are folded down by moving such edge-folding units along the faces of the packaging body 20 on the protruding parts 22 side of the wrapping paper. Each of the edge-folding units is composed of a horizontal guide that moves, facing the upper or lower parts of the protruding parts 22 of the wrapping paper, a folding guide that folds the sides of the protruding parts of the wrapping paper while moving in contact with the protruding parts of the wrapping paper, a vertical guide that moves, facing the faces of the packaging body on the protruding sides of the wrapping paper and a pair of rollers that accentuate creases by nipping from both sides the folding lines made by the folding guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping machine having a function of automatically winding a wrapping paper around an article to be wrapped and folding a portion of the wrapping paper protruding from the article to be wrapped.

[0002]

2. Description of the Related Art Conventionally, various automatic packaging machines have been proposed for packaging office paper such as copy paper, packaging of books and magazines after binding, and packaging of catalogs and pamphlets (Japanese Patent Laid-Open No. 55-55). -5331, JP-A-62-146114, JP-A-1-226512 and JP-A-56-147205).

In each of these packaging machines, a wrapping paper cut according to the size of the packaged object is wrapped around the packaged object to form a so-called body-wound state, and it is projected laterally from both sides of the packaged object. Part of the wrapping paper (hereinafter referred to as the wrapping paper protrusion)
Is folded into a predetermined shape using a jig. For example,
In the packaging machine described in Japanese Patent Laid-Open No. 55-5331, FIG.
As shown in FIG. 8A, a jig 51 having a tapered tip is horizontally moved along the surface of the packaged body 50 on which the wrapping paper is wrapped, on the side of the wrapping paper projecting portion 52, and FIG. (B)
As shown in FIG. 8, the side portions (ears) of the wrapping paper projecting portion 52 are folded, and then, as shown in FIG. 8C, a guide surface 53a for guiding the upper and lower portions of the wrapping paper projecting portion 52 to the center is provided. The jig 53 is horizontally moved along the surface of the article to be packaged 50 on the side of the wrapping paper projecting portion 52 to fold the upper part and the lower part of the wrapping paper projecting part 52.

[0004]

However, in the conventional packaging machine, the size of the object to be packaged is limited and it is difficult to apply it to the objects to be packaged of different sizes, or the folding accuracy of the ears is large. There is a problem that is not satisfactory.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a packaging machine which can be applied to objects to be packaged of various sizes and has a high folding accuracy of the ears. To do.

[0006]

The packaging machine according to the present invention comprises:
Means for wrapping wrapping paper around the object to be packaged, edge folding units arranged corresponding to the respective corners of the object to be packaged, and each edge folding unit on the surface of the object to be wrapped in the direction of wrapping paper projection. And a horizontal guide that moves while facing the upper or lower portion of the wrapping paper protrusion when the fold unit moving means moves the fold unit moving means. Formed by a folding guide that moves while abutting on the protruding portion to fold the side portion of the protruding portion of the wrapping paper, a vertical guide that moves while facing the surface of the packaged body in the protruding direction of the wrapping paper, and the folding guide. It is configured by a fold emphasis member that sandwiches the fold line to be emphasized and emphasizes the fold.

[0007]

In the present invention, the edge-folding units are arranged corresponding to the respective corners of the packaged object, and these edge-folding units are moved by means of the edge-folding unit moving means to the wrapping paper projecting side of the packaged object. Fold the ears by moving them along the plane.

The edge folding unit is located above or below the projecting portion of the wrapping paper (in the case of the edge folding unit disposed above the projecting portion of the packaging paper, the ear is disposed above, and below the projecting portion of the packaging paper. In the case of a folding unit, a horizontal guide that moves while facing the lower part), a folding guide that moves while abutting the wrapping paper projecting part and folds the side part of the wrapping paper projecting part, and a surface on the wrapping paper projecting part side. It is composed of a vertical guide that moves along and a fold highlighting member that sandwiches the fold line formed by the fold guide to emphasize the fold.

That is, in the present invention, the upper portion or the lower portion of the wrapping paper projecting portion is supported by the horizontal guide, and in this state, the side portions (ears) of the wrapping paper projecting portion are folded by the folding guide.
The portion folded by the folding guide is pressed by the vertical guide toward the surface of the body to be packaged protruding side of the body to be wrapped with the movement of the edge folding unit. Further, the fold line formed by the fold guide is sandwiched by fold emphasis members such as a pair of fold rollers to emphasize the fold. As a result, the folding accuracy of the ears can be improved as compared with the conventional case.

The arrangement position of the edge-folding unit can be changed according to the size of the object to be packaged, so that it can be applied to objects of various sizes.

[0011]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a schematic side view showing a packaging machine according to an embodiment of the present invention, and FIG. 2 is a schematic front view thereof.

In the packaging machine of this embodiment, two types of sheet rolls 1 and 2 having mutually different widths can be mounted,
The wrapping paper 3 is supplied from either one of the sheet rolls depending on the size of the packaged object. The wrapping paper 3 unwound from the sheet roll 1 (or the sheet roll 2) is guided by a plurality of guide rolls 4 and rolls on the horizontally arranged conveyor 10 and the conveyor 10. The paper is conveyed to the paper standby position between the conveyance rollers 14a. A longitudinal cutter 5, a width cutter 6, and gluing parts 7, 8 are arranged in this order from the sheet roll side along the wrapping paper conveyance path to the paper standby position. Cutter 5,6
Cuts the long wrapping paper 3 according to the size of the packaged object 20. Further, the gluing section 8 includes a feeding reel 8a on which a tape coated with glue is wound, a transfer roll 9 for pressing the tape onto the wrapping paper to transfer the glue to the wrapping paper, and a tape after gluing. It is composed of a take-up reel 8b for winding. The gluing portion 7 is also configured substantially the same as the gluing portion 8 except that the gluing direction is different. Therefore, the wrapping paper is cut into a size corresponding to the size of the packaged body 20, and is conveyed to the paper standby position in a state where the adhesive is attached to a predetermined portion of the edge of the sheet.

On the other hand, the object to be packaged 20 is composed of the conveyer 13
And is placed on the stand 12 at the box standby position. The stand 12 is vertically movable by an elevating mechanism 11. Above the stand 12, a pair of elevator belts 15 for sandwiching the packaged object 20 and moving it upward is provided. A winding roller 14b is arranged between the transport roller 14a and the elevator belt 15. One set of the winding rollers 14b is arranged at a position sandwiching the package 20. The packaged body 20 is moved upward by the elevating mechanism 11 while these winding rollers 14b are being wound.
The wrapping paper is wrapped around.

The packaged object 20 is moved upward by the elevator belt 15, and an edge folding portion and a vertical folding portion are provided in this movement region. An edge-folding unit, which will be described later, is provided at the edge-folding portion, and the protruding portion of the wrapping paper wound around the article to be packaged 20 is edge-folded. Further, at the upper and lower folding portions, the folding roller 17 folds the upper and lower portions of the wrapping paper projecting portion,
The two are joined by the glue transferred to the wrapping paper.

The article to be packaged 20 wrapped in the wrapping paper in this manner is further conveyed upward by the elevator belt 15 and discharged by the discharge conveyor 16.

3 (a) to 3 (c) are schematic views showing the process of winding the wrapping paper 21 around the packaged body 20 at the body winding portion.

First, as shown in FIG. 3A, the package 20 placed on the stand 12 is moved upward from the package standby position by the elevating mechanism 11. At this time, the winding roller 14b is arranged so as to substantially contact the side surface of the packaged body 20. The object to be packaged 20 has a wrapping paper 2 on its upper surface.
1 is pushed up, but both sides of the wrapping paper 21 are pressed by the winding roller 14b, so that both ends of the wrapping paper 21 hang vertically downward along the side surface of the packaged object 20.

Next, as shown in FIG. 3B, the winding roller 14b slightly moves along the lower surface of the package 20 to support the package 20. At the same time, the stand 12 once descends to the standby position.

Next, as shown in FIG. 3 (c), the winding roller 14b on one side advances along the lower surface of the package 20 to a substantially central portion. After that, the winding roller 14b on the other side advances to the substantially central portion along the lower surface of the packaged object 20, and the winding roller 14 on the one side also.
b retracts to the initial position. As a result, the ends of the wrapping paper 21 are joined together in a state of being folded and overlapped at the central portion of the lower surface of the packaged body 20. In this way, the packaged object 20 becomes the wrapping paper 2.
It is wrapped in 1 and is in a so-called body-wound state. After that, the stand 12 moves up again to transfer the object to be packaged 20 to the edge portion, and when the object to be packaged 20 is sandwiched by the elevator belt 15, the stand 12 descends to the position of the conveyor 13.

FIG. 4 is a schematic perspective view showing the folded portion of the ear.
At the folds of the ears, align with the corners of the packaged body 20,
Eight edge folding units U11 to U14 and U21 to U24 are arranged. Ear folding unit U12, U13, U2
1, U24 have the same shape, and the ear folding unit U11,
U14, U22, U23 are all ear folding units U1
The shape is symmetrical with respect to 2, U13, U21 and U24.

FIG. 5 is a plan view showing the edge-folding unit moving mechanism of the edge-folding portion. Each ear folding unit U11 to U14, U2
1 to U24 are fixed to a toothed belt 33 stretched between pulleys 34a and 34b, and are movable in the X direction along a guide rail 35. In addition, the guide rail 3
Both ends of the screw 5 are screwed into the feed screw 31, and the feed screw 5 is moved in the Y direction by rotating the feed screw 31. The two feed screws 31 are connected via a sprocket 36 and a chain 32. When one feed screw 31 is rotated, the other feed screw 31 is also rotated and the two guide rails 35 are interlocked. It is supposed to do.

The ear folding unit moving mechanism is composed of two upper and lower stages, and the units U11, U12, U13,
U14 is provided, and units U21, U22,
U23 and U24 are provided. The distance between the upper and lower stages can be adjusted with a feed screw (not shown).
It can be applied to the packaged object of any size.

FIG. 6 is a perspective view showing the ear folding unit.
The edge-folding unit includes a plate-shaped guide (horizontal guide) 41 that is arranged parallel to the upper surface or the lower surface of the packaged object, and a plate-shaped guide (parallel guide) that is arranged parallel to the surface of the packaged object protruding side of the packaged object ( (Vertical guide) 42, a guide 43 arranged at the rear end of the edge folding unit, a pair of rollers 44, and a support portion 40.

Both ends of the guide 41 in the unit moving direction are bent in a "V" shape in a direction away from the object to be packaged, and are integrally formed with the support section 40 bent in a "U" shape. Has been done. Then, the guide 42 and the guide 43 are respectively provided on the side end and the rear end of the support portion 40 with the screw 4
It is fixed by 6. The leading end of the guide 42 is a sharp end (folding guide) 45 that pushes down the protruding portion of the wrapping paper when moving.
The sharp end portion 45 is formed so as to be curved inward from the tip of the guide 42 (that is, in the direction away from the packaged object).

Next, the ear folding operation at the ear folding portion will be described with reference to FIGS.
Will be described with reference to.

As shown in FIG. 4, the object to be packaged 20 is wrapped around the wrapping paper 21 and is sent to the edge folding section with the overlapping portion 23 of the wrapping paper 21 joined. The feed screw and the like of the edge-folding unit moving mechanism are adjusted in advance so that the guides 41 and 42 of each edge-folding unit are aligned with the corners of the packaged body 20.

First, when the object to be packaged 20 reaches the edge-folded portion, the edge-folding units U12, U22, U14 and U24 advance toward the center of the surface of the object to be packaged 20 on the side of the wrapping paper projection. Then, one side of the wrapping paper projecting portion 22 is folded at a right angle by the sharp end portion 45 and the guide 42, and a gentle folding line having an angle of 45 degrees is formed in a top view. This folding line is sandwiched between the rollers 44 of each of the edge-folding units as the edge-folding units U12, U22, U14, and U24 move, and the folds are emphasized.

Next, the ear folding unit U11, U21, U1
3, U23 advances toward the central portion of the surface of the packaged body 20 on the projecting side of the wrapping paper, and the edge folding units U12, U2.
2, U14 and U24 retreat. Ear folding unit U11,
As the U21, U13, and U23 move forward, the other side of the wrapping paper projecting portion 22 is folded, and a fold line having an angle of 45 degrees is formed on the other side as well when viewed from above. Then, the rollers 44 of the edge folding units U11, U21, U13, U23
This fold line is sandwiched between them to emphasize the fold. Also,
When the edge folding units U12, U22, U14, U24 are retracted, the folding line is guided by the guide 43 to be sandwiched between the rollers 44, and the folding line is further emphasized. In addition, guide 4
3 also has the function of preventing the wrapping paper from being caught when the unit is retracted.

Next, the units U11, U21, U1
3, U23 moves backward. At this time, the folds are further emphasized by the rollers 44 of each unit. This completes the ear folding process.

7 (a) and 7 (b) are a front view and a side view, respectively, showing the wrapping paper projecting portion 21 after completion of the edge folding process. After the end of the edge folding step, the packaged body 20 is sent to the upper and lower folding parts by the elevator belt, and the upper and lower parts of the wrapping paper projecting portion 21 are folded and transferred to the wrapping paper as shown by the arrow in the figure. Both are joined by glue. As a result, the packaging work is completed, and the articles to be packaged are discharged from the discharge belt above the elevator belt.

In this embodiment, since the side portion of the projecting portion of the wrapping paper is folded by the edge folding unit configured as described above, the accuracy of the folded shape of the edge portion is high. Further, since the arrangement position of the edge folding unit can be easily changed according to the size of the paper to be wrapped, it can be applied to the objects to be wrapped of various sizes.

In the above-mentioned embodiment, in order to prevent the edge-folding units from colliding with each other, the edge-folding units U12, U22, U14, U24 and the edge-folding unit U1 are avoided.
Although 1, U21, U13, and U23 are alternately advanced, these ear folding units may be simultaneously advanced if the size of the package is large and there is no risk of collision between the ear folding units.

[0034]

As described above, according to the present invention, the horizontal guide that moves while facing the upper portion or the lower portion of the wrapping paper projecting portion and the horizontal guide that moves while abutting on the side portion of the wrapping paper projecting portion. An ear fold having a folding guide that folds the side of the paper projecting portion, a vertical guide that moves while facing the surface of the packaged paper projecting portion of the packaged object, and a fold emphasis member that sandwiches the fold line and emphasizes the fold. Since the unit is arranged corresponding to each corner of the packaged object, the accuracy of the folded shape of the ear is high. Also,
By making it possible to change the arrangement position of the edge folding unit according to the size of the packaged object, it is possible to correspond to the packaged objects of various sizes.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a packaging machine according to an embodiment of the present invention.

FIG. 2 is a schematic front view of the same.

FIG. 3A to FIG. 3C are schematic diagrams showing a process of body-wrapping a wrapping paper around a body to be packaged in a body-wrapping portion.

FIG. 4 is a schematic perspective view showing a fold portion.

FIG. 5 is a plan view showing an edge-folding unit moving mechanism of an edge-folding portion.

FIG. 6 is a perspective view showing an ear folding unit.

7 (a) and 7 (b) are respectively a front view and a side view showing a wrapping paper projecting portion after completion of the edge folding step.

8A, 8B, and 8C are schematic perspective views showing a method of folding a wrapping paper projecting portion in a conventional packaging machine.

[Explanation of symbols]

 1, 2; Sheet roll 3, 21; Wrapping paper 4; Guide roll 5, 6; Cutter 7, 8; Gluing part 9; Transfer roll 15; Elevator belt 20; Packaged object 40; Support part 41-43; Guide 45 ; Sharp ends U11 to U14, U21 to U24; Ear folding unit

Claims (2)

[Claims] 1. A means for wrapping a wrapping paper around an article to be packaged, an edge folding unit arranged corresponding to each corner of the article to be packaged, and each edge folding unit projecting the wrapping sheet of the article to be packaged. A horizontal guide that moves while facing the upper or lower portion of the wrapping paper projecting portion when moved by the edge-folding unit moving means. A folding guide that moves while abutting the wrapping paper projecting portion and folds a side portion of the wrapping paper projecting portion; and a vertical guide that moves while facing the surface of the wrapping paper projecting direction side of the packaged object, A packaging machine, comprising: a fold highlighting member that sandwiches a fold line formed by the fold guide to highlight a fold. 2. The packaging machine according to claim 1, wherein the arrangement position of the edge folding unit can be changed according to the size of the packaged object.