JP5440904B2 - Film punching device for corners of film. - Google Patents

Description

  The present invention relates to a punching device for corner-cutting a corner of a film-like product into a corner.

  When manufacturing a product made of a rectangular film-like material, the four corners of the film-like material are sharp, right-angled corners, and the sharp corners are caught on other materials, and are Since there is a risk that the alignment may be disturbed or the sharp corners may be touched and damaged by the hands of workers or consumers, the corners are cut into corners and removed.

  An example of a product using such a film is a pouch container. Two rectangular pouch containers (two in the case of a standing type pouch container and four on the standing part) are stacked on a long material sheet, and a number of rectangular pouch equivalent parts (film-like material) (Corresponding to the left and right sides) and heat-sealed at positions corresponding to the lower end, and only the position corresponding to the upper end is left without being bonded, and a pouch-corresponding portion consisting of a number of bag-like regions The pouch container is formed by cutting a portion corresponding to each pouch from the material sheet by cutting. The pouch container thus formed is then filled with the contents from the upper end not bonded between the two sheet pieces in the contents filling step, and then the upper end is sealed and sealed, It is a product. Even in such a pouch container, it is necessary to cut the corner portion.

Japanese Patent Laid-Open No. 5-8331 JP-A-8-119229 JP 2001-170898 A JP 2001-322095 A ACT 5-88898

  A punching technique is known as a technique for performing a corner cut of this film-like material (Patent Document 1, Patent Document 2, and Patent Document 4). This punching is performed by punching and cutting a corner portion of a film-like material supplied to a processing portion of a punching device using a punch and a die.

One of the problems in corner cutting by this punching is the problem of mismatch between the apex of the punched shape of the corner cut and the dividing line of the adjacent film-like material.
That is, when a pouch container is manufactured, as shown in FIGS. 9 and 10, a large number of pouch-corresponding portions 53 constituting the pouch container are formed on the long material sheet 51 at one time, and the heat seal 56 is formed. After being applied, each pouch container 1a is formed by being cut on a cutting line 54 by a slitter or a cutter.

  Since the corner of the pouch-corresponding portion 53 appears on the intersection of the slicing line 54, it is desirable that the corner cut punched shape vertex 58 correctly matches the slicing line 54. If the lines do not coincide with each other, there is a problem that a protrusion 55 called “one” as shown in FIG. 11 occurs (see FIGS. 7 and 8 of Patent Document 1).

  Therefore, the outline of the punching blade is devised so that the width of the top of the punching shape is widened so that the cutting line is always within the width of the top of the punching shape so that the mismatch between the top of the punching shape and the cutting line is not noticeable. It was considered to make (see Patent Document 1). However, in this case, since the width of the top of the punched shape is thick, a step is generated at the connection portion between the top of the punched shape and the dividing line, so that it is not a fundamental solution.

  In view of this, it has been considered to arrange a presser device that presses the corner portion corresponding to the pouch in the processed portion of the punching device (Patent Document 4). In this presser device, the upper and lower presser members with inclined surfaces are arranged on both sides of the dividing line previously placed in the long material sheet, and are sandwiched by the presser member from above and below the long material sheet. After pulling the pouch equivalent part to form a gap along the dividing line between them, the corner part (pour spout) is punched with a punch and die so as not to leave a sharp cut corner. . In this method, the slicing line is almost completely tangential and touches the punching outline, so that it is possible to avoid the occurrence of a cutting corner, which is the current mainstream technology (see FIGS. 5 and 6 of Patent Document 4). ).

  However, with this technology, if the distance between the two inclined surfaces with the dividing line as the boundary is too far away, the outer edge of the material sheet will be drawn inward toward the processed part, and a gap will be formed in the dividing line. There is a risk that it will be difficult.

  In addition, even if the two inclined surfaces are reasonably close, if the pouch-corresponding portion is made of a hard material, it is difficult for the upper presser member to fall along the inclined surface before the upper presser member is lowered. When descending, the lower end portion of the upper presser member mainly descends while being brought into contact with the pouch-corresponding portion, so that the outer end of the material sheet is also pulled inward, which may make it difficult to form a gap. Further, when the material sheet is thin or soft and easily stretched, the positioning of the material sheet in the processed portion tends to become unstable.

Another method of widening the cutting line previously placed between adjacent pouch equivalents on the material sheet at the corner cut part is to flex the adjacent pouch material sheet at the corner cutting part to widen the cutting line. There is also (patent document 2).
This method is an advantageous technique because the dividing line can be expanded well, but the sheet is pressed and fixed so as to surround the corner cutting blade (the first moving blade 182 or the second moving blade 192). Therefore, when the material sheet is a soft material, there is a possibility that it will be difficult to cut off the corner portion.

Further, if the punched piece remains in the machined portion of the apparatus, the subsequent punching operation may become an obstacle. Regarding the removal of the punched piece, it is conceivable to blow it off with air. For example, in the apparatus as disclosed in Patent Document 5, there is no contrivance for correctly applying air to the punched piece. The air is not used efficiently because the air is applied to the punched piece (bag B), and the punched piece is not removed smoothly.
In the case of product die cutting, there are many techniques for positioning a product by pressing the peripheral part of the product with a pressing member to perform die cutting (see, for example, FIG. 9 and FIG. 15 of Patent Document 3). Since it is not used in combination with the punching cutter, it cannot be applied as it is to punching a pouch.

  The present invention has been made in view of the circumstances as described above, and the cutting line is in contact with the punching outline in a substantially complete tangent state, and the occurrence of protrusions at the cutting corner can be favorably avoided, particularly between pouches. The formation of a gap along the dividing line is reliable, the positioning of the material in the processing part is reliable, and the punched pieces are quickly removed from the processing part to enable continuous operation of the device. It aims at providing the punching apparatus of the corner cut part of a film-form thing.

Corresponding to this object, the corner punching device for the film-like product according to the present invention is a punching device for corner-cutting the corner portion of the film-like material provided with a dividing line in the supply direction supplied to the processing portion of the punching device. An apparatus having a punching blade at a tip, and a punch capable of advancing and retreating toward the processing part;
A guide device having a die having a punching edge for punching a corner portion of the film-like material in cooperation with the punching blade, a bent guide surface for guiding the corner portion of the film-like material to the processing portion, and in punching apparatus corner cut portion of the front SL film material interposed therebetween pressing presser and off Irumu like material Ru provided with between the guide device, the said holding device around the film material corner portions of the processing unit It is characterized in that it is configured such that the end of the corner portion is pulled away from the slicing line by pressing the portion sandwiched therebetween .

According to the first aspect of the present invention, when a gap is formed between adjacent corners, only the immediate vicinity of the corner to be cut of the film-like material supplied to the processing portion of the punching device is guided. The curved guide surface restrains and bends, and the tip of the corner is moved backward, so that the formation of a gap between the corners of adjacent film-like objects is ensured, and the arc-shaped corner in the subsequent process Cutting can be performed satisfactorily.
In addition, since the guide device and the pressing device sandwich and fix the bent state of the corner of the film-like object, the punching operation by the punch and the die is surely performed, and the corner cut of the predetermined shape is realized well.

  According to the second aspect of the present invention, the guide surface of the guide device has a stepped or curved inclined portion that is lowered from the outer side of the punched shape apex to the apex side of the punched shape, and an annular shape connected to the inside thereof. Since the flat portion is used, the corner portion of the film-like product is particularly surely bent.

  According to the invention described in claim 3, since the press surface for pressing the film-like object is shaped in accordance with the guide surface of the guide device in cooperation with the guide device, the press of the film-like object is particularly reliable, and the corner Cut processing can be performed reliably.

  According to the fourth aspect of the present invention, the direction of bending of the corner portion of the film-like material is downward and coincides with the operation direction of the punch and the discharge direction of the residue, so that the processing is performed smoothly.

  Further, according to the invention described in claim 5, in addition to being able to remove the punched punch generated by the corner cut, the fluid spouted from the spout of the punch as required when the film-like material is a hard material. Thus, the corner portion can be bent or bent by pushing down the appropriate amount in advance, so that the formation of a gap between the adjacent corner portions is more reliable.

Front view of punching device Plane explanatory drawing of punching device Front view of punch Plan view showing the tip of the punch Die longitudinal section Die top view Plane explanatory diagram of material sheet Explanatory drawing showing the operation sequence of the punching device Plane explanatory drawing showing a continuous film Front explanatory drawing showing a pouch Explanatory drawing which shows the state of the corner cut in the conventional punching apparatus

Details of the present invention will be described below with reference to the drawings.
In FIG. 10, 1 is a film. The film-like object 1 is a thin, flexible film-like object, and is an object of corner cut punching processing of a corner portion by the punching apparatus of the present invention. In this embodiment, a pouch container 1 a is used as an example of the film-like object 1.

    The film-like material may be a single-layer or multilayer film made of resin film, metal foil, paper, or the like, or may be a slightly thick sheet-like material.

  As shown in FIG. 10, this pouch container 1a is provided with two film sheets of a front piece 2 and a back piece 3 that are front and back, and the left and right vertical sides are heat-sealed to form vertical seals 4 and 5 Thus, the lower horizontal side portion of the upper and lower horizontal side portions is similarly heat-sealed to form the lower horizontal seal portion 7, and the upper horizontal side portion 6 a forms an unsealed bag. The pouch container 1a is formed by cutting an upper pouch-corresponding portion 53 from a long material sheet 51 shown in FIG.

  The corners 8a, 8b, 8c, and 8d at the four corners of the pouch container 1a are cut into corners. The contour shape of the corner cut is an arc, an elliptical arc, or other curved arc, and both ends thereof are connected to any one of the upper, lower, left and right sides of the pouch container 1a. These corners 8a to 8d are obtained by corner-cutting the corner portion 17 before the corner-cut processing. This corner cutting process is performed by punching using a punching device (hereinafter simply referred to as a punching device) for a corner cut portion of a film-like object of the present invention.

The punching device 11 includes a punch 12, a die 13, a guide device 14, and a presser device 15 as shown in FIGS.
As shown in FIGS. 3 and 4, the punch 12 has four pouch-corresponding portions 53 adjacent to the front end of the punch body 16 on the material sheet 51 in the front-rear and left-right directions (up, down, left and right in FIG. 9). Each of the four corner portions 17 has a punching blade 18 for cutting by punching. For example, as shown in the drawing, this punching blade 18 cuts the corners of four adjacent corners 8 (two pairs 8a and 8d that face each other with the unsealed upper side 6a together). Since the contour of each corner cut is an arc of a quarter circumference, the contour 19 of the punching blade 18 has a substantially cross shape or diamond shape as shown in FIG. Of course, the present invention can also be applied to the case where the upper side portion 6a side is sealed and the lower side portion 7 is not sealed. Further, the present invention may be applied when the upper horizontal side portion 6a or the lower horizontal side portion 7 is not attached.

The punch 12 is attached to the frame 21, moves up and down according to the movement of the frame 21, and advances and retreats toward the processing portion 22 of the punching device 11.
At the tip of the punch body 16, an air jet 23 is opened as a fluid jet inside the contour 19 of the punching blade 18. The air outlet 23 ejects air guided through an air passage 24 formed in the center of the punch body 16 toward the material sheet 51 or the processing portion 22. Although normal temperature air is preferable as the fluid, the type of fluid may be changed as appropriate, and the fluid temperature may be changed as appropriate.

On the other hand, the die 13 is fixed to the die frame 25 and disposed in the processing portion 22 of the punching device 11.
The die 13 punches the corner 17 of the pouch-corresponding portion 53 for corner cutting in cooperation with the punch 12, and as shown in FIGS. A shape 20 is provided.

  The die frame 25 fixes and supports the die 13 and constitutes a guide device 14 that itself guides the pouch container 1a. The guide device 14 has a guide surface 31.

The die frame 25 fixes and supports the die 13. At this time, the upper surface 28 of the die 13 is positioned one step lower than the upper guide surface 32 of the upper surface 30 of the die frame 25, and the upper surface 30 of the die frame 25. It is set to the same height as the lower guide surface 33. Between the upper guide surface 31 and the lower guide surface 32, there is provided an inclined guide surface 34 having a downward slope that descends toward the lower guide surface 32.
The inclined guide surface 34 guides the processed portion 22 of the punching device 11 by bending the corner portion 17 of the pouch equivalent portion 53 downward.

Further, the punching device 11 has a presser device 15. The presser device 15 has a presser plate 29 having a plate shape and is attached to the frame 21 via a spring 35.

The lower surface of the pressing plate 29 has a pressing surface 39 including a flat pressing surface 36 on the center side, an inclined pressing surface 37 positioned in the middle, and an outer flat pressing surface 38.
The flat pressing surface 36 can be shaped to follow the upper surface 28 of the die 13 of the guiding device 14 and the lower guiding surface 33 of the die frame 25 and overlap the lower guiding surface 33, and the inclined pressing surface 37 can be inclined to the guiding device 14. The shape follows the guide surface 34 and can overlap the inclined guide surface 34 of the guide device 14. Further, the flat pressing surface 38 has a shape imitating the upper guide surface 32 of the guide device 14 and can overlap the upper guide surface.

  The presser plate 29 of the presser device 15 advances and retreats toward the processing portion 22 as the frame 21 advances and retreats. When the frame 21 advances toward the processing portion 22 and the presser plate 29 also advances along with this, the corner portion 17 of the pouch equivalent portion 53 is first bent downward along the inclined guide surface 34. The presser plate 29 sandwiches the corner portion 17 together with the guide surface 32 of the guide device 14, and thereafter, the presser plate 29 compresses the spring 35 and compresses the spring 35 until the punch 12 reaches the processing portion 22. The pouch-corresponding portion 53 is held under pressure while increasing the pinching pressure between it and 31.

The operation of performing the corner cutting process of the corner portion 17 of the pouch-corresponding portion 53 in the punching device 11 configured as described above is as follows.
A two-layer long material sheet 51 formed by overlapping two sheets for the front piece 2 and the back piece 3 constituting the pouch equivalent portion 53 is supplied onto the production line, and further shown in FIG. As shown, left and right vertical seal portions 4 and 5 and a lower horizontal seal portion 7 are provided for each pouch equivalent portion unit, and only the upper horizontal side portion 6a is unsealed, and a plurality of pouch equivalent portions 53 are made of a material sheet. 51 are arranged vertically and horizontally. This material sheet 51 is further formed into a plurality of film-like material continuums 52 in which the upper horizontal side portion 6a is cut by the leather cutter 10 or the like at the cutting line 54 and the horizontal pouch equivalent portions 53 are continuously arranged in the vertical direction. The plurality of film-like material continuums 52 are supplied to the processing unit 22 in parallel in a state of being adjacent to other film-like material continuations with the dividing line 54 as a boundary. Each continuous film-like body 52 has a plurality of pouch-corresponding portions 53 continuous in the flow direction on the line.

  In the processing section 22, the punching device 11 performs a corner cutting process on the portion corresponding to the corner portion 17 of the pouch-corresponding portion 53 on the film-like continuous body 52, and then the film-like continuous body 52 has a shear-cut portion (not shown). The pouch container 1a shown in FIG. 10 is completed by cutting along the left and right vertical seal portions.

Corner cut processing in the processing section 22 is performed as follows.
As shown in FIG. 8, that is, when the film-like product continuum 52 is supplied to the processing unit 22, the corner portion 17 of the pouch-corresponding portion 53 on the film-like product continuum 52 moves over the upper guide surface 32 of the guide device 14. It is guided and sent to the processing section 22 (FIG. 8a). The feeding direction at this time is a direction perpendicular to the paper surface. Since there is an inclined guide surface 34 and a lower guide surface 33 at the tip of the upper guide surface 32, the corner portion 17 is bent along its own weight along the inclined guide surface 34 (FIG. 8b). At this time, if necessary, the compressed air is ejected from the air outlet 23 at the tip of the punch 12 and hits the corner portion 17 that reaches the processed portion 22 in the pouch-corresponding portion 53, and the corner portion 17 is bent downward. Promote.

  Next, the frame 21 is driven, and the punch 12 fixedly supported by the frame 21 descends toward the processing portion 22, but before that, the presser plate of the presser device 15 supported below the punch 12. 29 reaches the guide device 14, the flat pressing surface 36 and the inclined pressing surface 37 of the pressing plate 29, the upper guide surface 31, the inclined guide surface 34, the lower guide surface 32, and the flat pressing surface on the upper surface of the die 13. 36, the peripheral portion of the corner portion 17 of the pouch-corresponding portion 53 is sandwiched between the inclined guide surface 34 and pressed. This force for narrowing is gradually strengthened by the compression of the spring 35 as the punch 12 is lowered, and the corner portion 17 is firmly held.

  Since the inclined guide surface 34 and the inclined pressing surface 37 sandwiching the peripheral portion of the corner portion 17 of the pouch equivalent portion 53 are both inclined surfaces, the curved portion is curved downward from the peripheral portion sandwiched between the upper guide surface 31 and the flat pressing surface 36. To do. When this is observed in a plan view, the opposed upper lateral sides 6a, 6a of the adjacent pouch equivalent portions 53 are drawn in opposite directions, and a gap 61 having a width g is formed therebetween.

  In addition to this, when the pressing plate 29 and the tip of the punch 12 approach the processing portion 22, air is blown from the air outlet 23 at the tip of the punch and applied to the corner portion 17 of the pouch-corresponding portion 53. Since it can be pushed down or bent so that it can be pushed down easily, the corner portion 17 of the pouch-corresponding portion 53 is bent and the width g of the gap 61 is reliably provided. The body 52 can be clamped (FIG. 8c).

  In this state, when the corner portion 17 of the pouch-corresponding portion 53 is punched into the gap 61 with the punch 12 and the die 13, the punching shape apex 58 due to the outline of the substantially diamond-shaped punching blade of the punching blade 18 of the punch 12 is formed in the gap 61. Then, the corner cut processing is realized in which the contour of the corner cut smoothly communicates with the left and right vertical sides 4 and 5 of the pouch equivalent portion 53 (FIG. 8D).

  The punching rod 62 from the corner portion 17 can be removed by being blown downward by the air jet from the air outlet 23, and this does not hinder the subsequent corner cutting process.

  The inclined guide surface 34 and the inclined pressing surface 37 described above may be formed into a vertical stepped shape or a curved surface as appropriate depending on the degree of bending of the film-like continuous body 52.

  As described above, in the punching device of the present invention, when the gap 61 is formed between the adjacent corner portions, only the immediate vicinity of the corner portion of the film-like material supplied to the processing portion of the punching device to be cut is guided. The device is restrained and bent by the bent guide surface of the apparatus, and the end of the corner is pulled back, so that the corner is reliably bent, and therefore, the formation of a gap between adjacent film-like objects is ensured. Thus, the arc-shaped corner cut in the post process can be performed satisfactorily.

  Further, since the guide device and the presser device sandwich and fix the bent state of the corner portion of the film-like material, the punching operation by the punch and the die is surely performed, and the corner cut of the predetermined shape is realized well.

  In addition, the bending of the corner portion of the film-like material is first performed by the guide device. In addition, the fluid ejected from the punch outlet can push down or bend the corner portion. It is possible to more reliably form a gap between the matching corner portions.

  In addition, since the guide surface of the guide device is a stepped or curved inclined portion that is lowered from the outside of the punching edge shape toward the punching edge side and an annular flat surface portion connected to the inside thereof, Bending can be performed particularly reliably.

  In addition, since the press surface for pressing the film-like object is shaped in accordance with the guide surface of the guide device in cooperation with the guide device, the film-like object press is particularly reliable and the corner cutting process can be performed reliably. .

  As is apparent from the above description, according to the present invention, since the cutting line is in contact with the punching outline in a substantially complete tangent state, it is possible to favorably avoid the occurrence of protrusions at the cutting corners, and in particular, the cutting line between the pouches. The formation of gaps along the surface is reliable, the positioning of the material sheet in the processing part is reliable, and the punching punch, which is a punched piece, is quickly removed from the processing part, enabling continuous operation of the equipment. A punching device for the corner cut portion of the film-like material can be obtained.

DESCRIPTION OF SYMBOLS 1 Film-like object 1a Pouch container 2 Front piece 3 Back side 4 Left vertical seal part 5 Right vertical seal part 6a Upper horizontal side part 7 Lower horizontal seal part 8a-8d Corner 10 Leather cutter 11 Punching device 12 Punch 13 Die 14 Guide device DESCRIPTION OF SYMBOLS 15 Pressing device 16 Punch main body 17 Corner part 18 Punching blade 19 Punching blade outline 20 Punching edge shape 21 Frame 22 Processing part 23 Air jet outlet 24 Air passage 25 Die frame 28 Die upper surface 29 Presser plate 30 Die frame upper surface 31 Guide Surface 32 Upper guide surface 33 Lower guide surface 34 Inclined guide surface 35 Spring 36 Flat pressing surface 37 Inclined pressing surface 38 Flat pressing surface 39 Pressing surface 51 Material sheet 52 Film-like material continuous portion 53 Pouch equivalent portion 54 Dividing line 55 Protruding portion 56 Heat seal 58 Top of punched shape 6 1 Clearance 62 Punching punch

Claims (5)

A punching device for corner-cutting a corner portion of a film-like material that has been subjected to a dividing line in the supply direction supplied to the processing portion of the punching device, having a punching blade at the tip, and facing the processing portion And a punch that can move forward and backward,
A guide device having a die having a punching edge for punching a corner portion of the film-like material in cooperation with the punching blade, a bent guide surface for guiding the corner portion of the film-like material to the processing portion, and in punching apparatus corner cut portion of the front SL film material interposed therebetween pressing presser and off Irumu like material Ru provided with between the guide device, the said holding device around the film material corner portions of the processing unit A punching device for a corner cut portion of a film-like object, characterized in that the end of the corner portion is pulled in a direction away from the slicing line by pressing with a portion interposed therebetween.   The guide surface of the guide device is a stepped or curved inclined guide surface whose height position changes from the outside of the contour of the punching edge of the die toward the punching edge, and a plane closer to the punching edge than the inclined portion. 2. A punching device for a corner cut portion of a film-like product according to claim 1, further comprising a guide portion.   The said pressing member is provided with the pressing surface which has the inclination pressing surface which followed the inclination guide surface of the guide surface of the said guide apparatus, and the plane pressing part which copied the said plane guide part. A punching device for corner cuts of film-like objects.   4. The film-like product according to claim 2, wherein the inclined guide surface of the guide surface of the guide device has a stepped shape or a curved shape that decreases from the outside of the outline of the punching edge toward the punching edge side. Corner-cutting punching device.   The corner cut portion of the film-like product according to any one of claims 1 to 4, further comprising a jet outlet capable of jetting fluid toward the processing portion inside the outline of the punching blade. Punching device.

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