JP5784872B2 - Bag making inline cutting method and apparatus - Google Patents

Description

  The present invention relates to a bag making in-line cutting method and an apparatus thereof in an in-line bag making machine in-line.

  In general, the bag-making process of a flat bag (flat bag) is as shown in the plan view of FIG. 5, in which a two-layered plastic film 1 is fed out in a continuous or intermittent operation (in the direction of the arrow). ) And heat-sealing both end portions in the film width direction along the film feeding direction to form the bottom seal portion 2 of the bag body, and the length in the film feeding direction is parallel to the film width direction. Heat seal at intervals to form a side seal portion 3 equivalent portion of the bag body, and further slit the central portion in the width direction of the film 1 along the central line x in the film feeding direction with a central slitter Cx. A rectangular flat bag of one unit comprising the bottom seal part 2, the side seal part 3 and the opening part 4 by forming the opening parts 4 and 4 across the central slit line x (on the upper and lower sides in the drawing). A is multifaceted to many units Web-like bag body film is formed.

  In this way, the long double-layer plastic film 1 is a web in which one unit of a rectangular flat bag A composed of a bottom seal portion 2, a side seal portion 3 and an opening 4 is multifaceted in many units. It is formed as a bag-like film 1. Subsequently, the marginal outer edges of the bottom seal portions 2 and 2 formed at both ends in the width direction of the web-shaped bag body film are removed by slitting with both-end slitters C1 as necessary.

  In the cutting process of cutting as a single bag A, as shown in FIG. 6, the central slit line x of the opening 4 by the central slitter CX of the web-shaped bag film to be fed and the length of the side seal 3 The crossing with the direction center line y is a diamond cutting punch Cz1 which is a corner cutting means, and both longitudinal ends of the side seal part 3 are corner cutting means V. Cutting with the notch blades Cz2 and Cz2 for character-shaped notches (C), and rounded corners (or corners) are cut at each corner (corner) of the rectangular bag that is multifaceted. The applied corner portion corresponding portion A1 is formed. Subsequently, one sheet as a cutting means in a direction orthogonal to the film feeding direction along the longitudinal center line y of the side seal portion 3 of the web-shaped bag film 1 on which the bag body A is multifaceted. The cutting blade Cy is linearly cut to divide the multi-faced bag as a bag A for each unit, thereby completing the bag making.

  By the way, along the central line y of the side seal portion 3, a single cutting blade Cy is used to cut linearly, and the multi-faced bag is sandwiched between the central cutting lines x and the unit of each unit on both sides. When the cutting position Cy is the cutting means and the position of the side seal portion 3 (in the feed stop state) of the web-like bag body film 1 that is intermittently fed does not match when cut as A As shown in FIG. 7 (a), the V-shaped portion A1 corresponding to the corner portion A1 of the bag A cut out at both ends of the side seal portion 3 on the center line y of the side seal portion 3 is provided. The cutting blade position that is the cutting tip position in the longitudinal direction of the rhombus-shaped side seal portion 3 of the corner portion corresponding portion A1 of the bag body A punched in the center portion and the cutting edge position and one linear cutting line Deviation occurs because the position of the blade edge of Cy does not match. There is a case.

  Therefore, as shown in FIG. 7 (b), the corner corresponding portion A1 of the rounded (or chamfered slope) shape of the bag body A cut and separated by the cutting blade Cy has a bag corner sharpness, a horn, etc. The burr-like projections 3a were generated, and there were problems with the stability of the quality of the bag and the safety in use.

  Therefore, as shown in FIG. 8 (a), on both sides of the side seal portion 3 in the longitudinal direction, two linear blades using the cutting edges of two cutting blades Cy and Cy are formed. As shown in FIG. 8 (b), by cutting with the cutting line, the corner portion corresponding to the rounded (or chamfered) shape of the bag body A cut and separated by the cutting blades Cy and Cy. The burr-shaped protrusions 3a such as bag corners and horns are not generated on A1.

  The web-shaped bag body film 1 on which the bag body A processed in this way is multifaceted is cut as the bag body A for each unit and is made into a bag. As such a cutting apparatus, There are devices as shown in Patent Document 1 and Patent Document 2.

  Moreover, as shown in FIG. 9, the both ends of a film width direction are heat-sealed along the sending direction (arrow direction) of the film 1 of the elongate two-ply plastic film 1, and the bottom seal part 2 of a bag body is attached. And heat-sealed at equal intervals in the film feed direction length in parallel with the film width direction to form a side seal portion 3 equivalent portion of the bag body, and then the bag-shaped integrated blade O (Thomson) There is a method of making a bag body A by using a blade) to remove the entire circumference (Thomson removal) or partially cut.

Japanese Patent Laid-Open No. 2001-079964 JP 2002-178418 A

  However, for example, when making a bag (flat bag) with a chuck (zipper) in which a chuck (zipper) having a predetermined thickness is attached to the opening 4 of the bag A, the web-shaped bag film 1 Since the bag A to which a chuck (zipper) having a predetermined thickness is attached is multifaceted in many units, the accuracy of the cutting position of the bag body corner portion is increased, and the bag corner sharpness, horn, etc. In order to suppress the occurrence of burr-like projections, alignment between the installation position of the cutting means for cutting in the direction orthogonal to the film feeding direction and the position of the side seal portion of the web-like bag film in the feeding stop state Adjustment requires a considerable amount of time and labor, and corner cutting in bag making processing has limitations on the form and variety of bags. Further, the existing in-line corner cut method is provided as a function dedicated to the bag making machine because of its device structure, and the bag making machine is limited to only the forms and varieties to which it corresponds. Or there are many restrictions on production, such as having to prepare a dedicated jig (blade) for each product type, and it is expensive.

  The present invention has a function to prevent the occurrence of burr-shaped projections such as bag corner sharpening and horns that occur when corner cutting is performed on a bag making machine. In-line cutting that improves the quality stability and safety of bags without being restricted by the form and type of various bags (bag making machines) with a movable retrofit system (device). Methods and apparatus are provided.

The invention according to claim 1 of the present invention is a heat seal bar in which a multi-layer film having a heat-adhesive inner surface layer is stacked, intermittently fed in the longitudinal direction, and a heater is built in each intermittent feed of the film. The multi-sided bag film formed by heat-sealing at each desired pitch is cut with a slit blade and a cutting blade at the heat-seal location to continuously manufacture each single bag body In the bag inline cutting method,
Perform corner cut punching by corner punching means equipped with a corner cut punching blade arranged after cutting in the longitudinal direction by a slit blade in the feed direction,
Cutting the corner cut punching points by punching means provided with a long, rectangular rectangular shear punching blade whose longitudinal direction is the longitudinal direction with respect to the film feed direction arranged after the corner cut punching and longer than the film width Cutting a line as a center line to produce each single bag body ,
The elongated rectangular shear punching blade of the punching means is a press shear punching system comprising a pair of lifting press male mold parts and a fixed female mold part, and
Of the pair of press male part and female part of the punching means, the male part can be exchanged to various sizes in the film feed direction, and the female part has a width in the film feed direction. The bag-making inline cutting method is characterized in that it can be changed to various sizes corresponding to the size of the mold part .

The invention according to claim 2 of the present invention is the bag making line cutting method according to the claim 1, the punching Nukite stage, bag making line, characterized in that movement is movable movable in said longitudinal direction of the film Cutting method.

According to a third aspect of the present invention, there is provided a bottom seal portion formed by heat-sealing the overlapping inner surface of a web-like two-layer film to be fed along both end portions in the film width direction, and orthogonal to the film feeding direction. A rectangular flat unit comprising a side seal part formed by heat sealing at equal intervals in the direction and an opening formed by slitting the central part of the film width along the central slit line in the film feeding direction. A web-like bag-making film having a multi-faced bag-like body, and a feed roll portion for feeding and feeding in this order, and substantially V-shaped at both ends in the longitudinal direction of the side seal portion between the feed roll portions. A corner cutting means for cutting a substantially rhombus (◇) -shaped center punched portion at the both ends and forming a bag body corner equivalent portion, and a film feed of the feed roll portion On the downstream side, there was provided a punching means for cutting the side seal portion into two along a central cutting line along the longitudinal direction and cutting the web-like bag-making film into a rectangular flat bag for each unit. An in-line cutting device for bag making,
The corner cutting means for forming the bag body corner corresponding portion is formed by cutting the both ends of the side seal portion in the longitudinal direction into a substantially V shape so that the corner of the notch is on the center cutting line. A notch cutting means having a pair of substantially V-shaped notch blades by a press shear notch method comprising a press male die portion and a female die portion of a set forming a body corner equivalent portion;
The press male part of the set that forms the bag body corner equivalent part by punching and cutting so that the center part in the longitudinal direction of the side seal part is approximately rhombus (◇) and the punching tip corner part is on the center cutting line And a punching cutting means by a press shear punching method having a substantially rhombus (◇) -shaped punching blade comprising a female mold part,
The punching means for dividing the side seal part into two parts includes a V-shaped closed tip corner part of the pair of notch parts punched at both ends of the side seal part by punching cutting means, The side seal portion extends over a pair of corners facing the central cutting line of the central punched portion punched in a substantially rhombus (◇) shape at a position where the slit line and the central cutting line intersect. the Ri striking Nukite stage der by press shearing punching method consisting to the longitudinal direction of the elongated plan view elongated slender rectangular set of press male part having a shearing edge for punching is punched in a rectangular shape and the female portion ,and
Of the pair of press male mold part and female mold part of the punching means, the male mold part can be replaced with various widths in the film feed direction, and the female mold part has a width in the film feed direction. The bag-making inline cutting device is characterized in that it can be changed to various sizes corresponding to the size of the male mold part .

According to a fourth aspect of the present invention, in the bag-making inline cutting device according to the third aspect , the pair of substantially V-shaped notch blades of the notch cutting means are directed toward the side seal portion in the longitudinal direction. A pair of opposing V-shaped closed tip corners or / and a pair of corners facing each other in the longitudinal direction of the side seal part of the substantially diamond-shaped punching blade of the punching cutting means Is a bag-making inline cutting device characterized by having a chamfered shape and a rounded corner shape.

The invention according to claim 5 of the present invention is the bag making line cutting device according to the claim 3 or 4, the substantially rhombic (◇) shaped punching blade of the punching cutting means constituting a corner cutting means to each other A pair of corners facing in the longitudinal direction of the side seal part and a pair of V-shaped facing parts in the longitudinal direction of the side seal part of the pair of substantially V-shaped notch blades of the notch cutting means. The closed end corner of the shape is a bag-making inline cutting device characterized in that a punched portion and a cutout portion are formed in the side seal portion on the central cutting line of the side seal portion, respectively.

The invention according to claim 6 of the present invention is the bag-making inline cutting device according to any one of claims 3 to 5 , wherein the punching cutting means has a substantially rhombus (◇) shaped punching blade side to side. The shape of the V-shaped open side of the pair of V-shaped corner portions facing in the longitudinal direction of the part seal portion is a circular shape that protrudes inward in line symmetry with each other to form a bag-making corner equivalent portion, A bag-making in-line cutting device, which is a curved shape or a straight shape, and each formed corner has a rounded corner shape or a chamfered (inclined straight line) shape.

The invention according to claim 7 of the present invention is the bag-making inline cutting device according to any one of claims 3 to 6 , wherein the pair of substantially V-shaped notch blades of the notch cutting means are mutually connected. A pair of V-shaped V-shaped open sides facing in the longitudinal direction of the side seal portion are circular and curved so as to project inwardly symmetrically with each other to form a bag-making corner equivalent portion. A bag-making inline cutting device having a shape or a straight shape, wherein each corner to be formed has a rounded corner shape or a chamfered (inclined straight line) shape.

The invention according to claim 8 of the present invention is the bag-making inline cutting device according to any one of claims 3 to 7 , wherein the punching means is movable and movable in the film longitudinal direction, Among the press male mold part and female mold part of a set of the punching means for punching the side seal part into a rectangular shape in plan view by a press shear punching method, the male part has various widths in the film feeding direction. The bag making in-line cutting apparatus is characterized in that it can be exchanged and the female mold part can be changed to various sizes corresponding to the size of the male mold part in the film feeding direction.

The invention according to claim 9 of the present invention is the bag making in-line cutting device according to any one of claims 3 to 8 , wherein the punching means can be attached to and detached from the bag making line of the device. It is a bag making inline cutting device characterized by being.

  According to the bag making in-line cutting method and apparatus of the present invention, the punching means for dividing the side seal portion of the bag body at the subsequent stage of the corner cutting means for forming the corner corresponding portion of the bag body in the in-line of the bag making machine. The punching means includes a male shear press portion having a long and narrow rectangular press punching shear side and a female shear receiving portion, each having a narrow and long width in the longitudinal direction of the side seal portion. A punching die is used, and the side seal part of a web-like bag-making film that has been multi-faceted is punched into a narrow rectangular shape with a predetermined narrow width along the longitudinal center cutting line and divided into two. The multi-sided bag-making bag-making film can be separated and cut as a rectangular flat bag for each unit including a bottom seal portion, a side seal portion, and an opening portion. Door can be.

Further, the bag making in-line cutting method and apparatus of the present invention provide a side seal portion of a web-like bag making film which has been multi-faced and made to be elongated at a predetermined narrow width along the center cutting line by the punching means. When punching linearly into a rectangular shape and dividing it into two parts, both ends of the side seal part of the web-like bag-making film on which the unit bag body equivalent part is multifaceted and made into multiple units on the central cutting line Punching a pair of opposite corners of the notch at both ends that were notched into a V shape by the corner cutting means, and the intersection of the center slit line and the center cutting line of the side seal part in a roughly diamond shape (◇) In order to cut linearly into an elongated rectangular shape with a predetermined narrow width so as to span a pair of corners opposed to the central cutting line of the central punching portion, When separating and cutting as a rectangular flat bag for each unit consisting of a part seal part, a side seal part and an opening part, the side seal part of the conventional web-like bag film is linearly linear. Compared with the case of cutting, the corners of each separated bag body are free of corner sharpening, horns and other burr-like projections, and are corner-cutting such as rounded cutting and chamfering cutting, with good quality and safety. The bag body can be made. In addition, the feeding adjustment of the web-like bag body film in the bag making process when linearly cutting into a linear shape as in the past, and the side seal portion of the web-like bag body film with respect to the film feeding direction Thus, it is possible to save the time and labor required for adjusting the arrangement position of the cutting means for cutting in the orthogonal direction.

  As described above, the bag-making inline cutting method and apparatus according to the present invention prevent the generation of burr-like protrusions such as bag corners and horns in the bag-making process involving corner cutting of the bag, thereby stabilizing the quality of the bag. The safety and safety can be improved, and the time and labor required for adjusting the arrangement position of the cutting means with respect to the side seal part of the web-like bag film can be saved and suppressed, and the shape and type of the bag can be freely controlled. It is possible to provide a bag-making in-line cutting device capable of making bags with a certain degree of flexibility.

The whole side view explaining the bag making in-line cutting apparatus of this invention. (A), (b) are the bag forming inline cutting method of the present invention and the planar shape of the center punching blade and the notch blades constituting the corner cutting means mounted on the apparatus, and the direction perpendicular to the film feeding direction. Schematic plan view for explaining the planar shape of the parting blade constituting the punching means for linear cutting, and the cutting positions of the center parting blade, both-end notch blades, and parting blades, (c) is a corner. The top view explaining the corner shape after cutting. Described below are the bag making in-line cutting method of the present invention, the parting punching blade of the punching means for linearly cutting in the direction orthogonal to the film feeding direction mounted on the apparatus, and the dust collecting tank provided in the punching means. Side view. (A), (b) is a plan view of punching means for linearly cutting in a direction orthogonal to the film feeding direction of the bag making in-line cutting method and apparatus of the present invention, and (c), (d) are the sides thereof. Sectional drawing. The top view of the web-shaped bag body film of the multi-sided in which the bottom part seal part and the side part seal part which were heat-sealed in general bag making inline cutting, and the opening part were formed. In a general bag-making inline cutting, a central punched portion and a notch on both sides of the side seal portion of the web-shaped bag film, and a cutting portion along a cutting line perpendicular to the film feeding direction by the punching means FIG. (A), (b) is a top view explaining the relative position of the corner cutting of a web-like bag body film in general bag making in-line cutting, and the state of occurrence of burr-like projections. (A), (b) is a top view explaining the relative position of the corner cutting of a web-like bag body film in general bag making in-line cutting and the parallel linear cutting and the state of occurrence of burr-like projections. The top view explaining the corner cutting by the perimeter punching (Thomson extraction) of the web-like bag body film in general bag making in-line cutting.

  The bag making in-line cutting device of the present invention will be described in detail below based on the embodiment of the present invention.

  FIG. 1 is a side view of a bag-making inline cutting apparatus according to the present invention. As shown in FIG. 6 described above, long (web) -like two-layered sheets that are fed out (in the direction of the arrow) by continuous feeding or intermittent operation are shown. The plastic film 1 (laminated film for packaging) is heat-sealed with a predetermined seal width in the feeding direction to form the bottom seal portion 2, and is orthogonal to the feeding direction at equal intervals with respect to the film length. Repeated heat sealing with a predetermined seal width in the direction, the side seal portion 3 is formed in sequence, and a single flat rectangular bag (flat bag) is a multi-unit web-shaped (Long-form) bag body film 1 is introduced, and a pair of upper and lower feed rolls 12 and 12 (nip rolls) are fed while adjusting the feeding speed in the direction of the arrow, and on the downstream side of bag film 1 Adjust the speed The web-shaped bag body film 1 to be fed is held horizontally between the pair of upper and lower feed rolls 13 and 13 (nip rolls) to be fed while being fed and the feed rolls 12 and 13 and is guided to be guided in the feeding direction. And a table 14. On the downstream side (immediately after) of the feeding roll 13 in the film feeding direction, a holding table 15 for holding the web-shaped bag body film 1 to be fed horizontally and guiding it in the feeding direction is provided.

  In FIG. 1, between the feed rolls 12 and 13, a mark sensor 17 for sequentially detecting the real feeding timing (for example, the position of the side seal portion 3) of the web-shaped bag film 1 to be fed, and a central slit A slitter 18 on the line x and a corner cutting (punching) means 19 (a press male part 19a and a fixed female part 19b that move up and down across the film 1) are provided.

  As shown in FIG. 7 described above, the corner cutting means 19 for forming the bag body corner corresponding portion has a central portion in the longitudinal direction of the side seal portion 3 in a substantially rhombus (◇) shape, and its four punching tip angles. The pair of tip corners facing each other is punched and cut so that they are on the center cutting line y and the center slit line x.

  As shown in FIG. 1, the corner cutting means 19 has a substantially rhombus (◇) consisting of a press male part 19a and a female part 19b of a set that forms the corners A1, A1, A1, A1 of the bag A. Punching cutting means by a press shear punching method having a cylindrical punching blade Cz1 (see FIG. 7) and both end portions in the longitudinal direction of the side seal portion 3 are substantially V-shaped, respectively, and their corresponding notch tips A press shear notch system comprising a press male part 19a and a female part 19b of a set that forms a corner A1, A1 equivalent part of the bag A by cutting so that the corner part is on the central cutting line y. And a notch cutting means having a pair of substantially V-shaped notch blades Cz2 and Cz2 (see FIG. 7). It should be noted that the punching cutting means and the notch cutting means in the corner cutting means 19 may be configured to perform cutting operations simultaneously with a structure integrally coupled to each other, or may perform cutting operations separately.

  As shown in FIG. 1, on the downstream side (immediately) of the feeding roll 13 in the film feeding direction, each side seal portion 3 of the web-like bag body film 1 to be fed is arranged along the central cutting line y in the longitudinal direction. Cutting means 20 (upper blade 20a, lower receiving blade 20b) for cutting into a linear shape is provided. In the present invention, the cutting means 20 may be omitted or the cutting operation may be stopped.

  Immediately after the feed roll 13 (when the cutting means 20 is omitted) or on the downstream side of the cutting means 20 in the film feeding direction, the side seal portions 3 of the web-like bag body film 1 to be fed are centered in the longitudinal direction. A punching means 21 for punching and cutting in a rectangular shape in plan view in a direction perpendicular to the film feeding direction along the cutting line y (a punching press male that moves up and down across the film 1) A die portion 21a and a fixed female die portion 21b are provided, and 21c is a hydraulic or pneumatic cylinder (camera & cam follower) (actuator) for moving the press male die portion 21a up and down.

  Further, as shown in the side views of the punching means 21 in FIGS. 1, 3A and 3B, the side seal portions 3 are elongated on the fixed female mold portion 21b side of the punching means 21. In order to remove from the male mold part 21a and the female mold part 21b, the thin punched debris generated by punching into a rectangular shape, the dust collection for collecting air by air suction during the punching means 21 operation. A dust tank 22 is provided as necessary.

  As shown in FIG. 1, the punching means 21 is formed by punching the side seal portions 3 of the multifaceted web-like bag body film 1 into an elongated rectangular shape along the central cutting line y. In addition, a stacker unit 16 for stacking the bags A is provided.

  As shown in FIG. 6 described above, the bag-making inline cutting device of the present invention continuously or intermittently feeds a long (web) two-ply plastic film 1 along the feeding direction of the film 1. Both ends of the film width are heat-sealed to form the bottom seal portion 2 of the bag body in the film 1 feeding direction, and heat is equally spaced in the film feeding direction length in the direction perpendicular to the film 1 feeding direction. After forming the web-like bag body film 1 in which the unit bag body A is multi-faced by forming a portion corresponding to the side seal portion 3 of the bag body, as shown in FIG. The bag-like film 1 is introduced between the feed rolls 12 and 12 and is fed while being pulled by the feed roll 13 with a predetermined tension, and the mark sensor 17 detects the film feed timing.

  Then, the slit means 18 shown in FIG. 1 (central slitter Cx, see FIG. 6) slits the central portion in the width direction of the film 1 to be fed along the central slit line x in the film feeding direction as shown in FIG. The openings 4 and 4 are formed across the central slit line x (on the upper and lower sides in the drawing).

  Thus, the long double-layered plastic film 1 shown in FIG. 1 has a single unit of a rectangular flat bag A composed of the bottom seal portion 2, the side seal portion 3, and the opening 4 shown in FIG. It is formed as a web-like bag body film 1 that is multifaceted in units. In addition, the outer edges of the margins of the bottom seal portions 2 and 2 formed at both end portions in the width direction of the web-shaped bag body film 1 are slit with a slitter C1 at both ends as required, as shown in FIG. To remove.

Subsequently, as shown in FIG. 7 described above, the web-like bag body film 1 is formed by the punching blade Cz1 (press male part 19a and female part 19b) of the punching cutting means provided in the corner cutting means 19 shown in FIG. The center part in the longitudinal direction of the side seal part 3 is formed in a substantially rhombus (◇) shape, and each pair of tip corners facing each other among the four punching tip corners is on the center cutting line y and the center slit line. As shown on x, the intersecting portion is punched and cut to form cutting corners A1, A1, A1, A1 corresponding to rounded corners or chamfered inclined sides. Further, as shown in FIG. 7 described above, both ends in the longitudinal direction of the side seal portion 3 are provided by the notch blades Cz2 and Cz2 (press male portion 19a and female portion 19b) of the notch cutting means provided in the corner cutting means 19. Corresponding to the cutting corners A1 and A1 of the round shape of the bag A or the chamfered inclined side shape by cutting the cut portions so that the respective portions are substantially V-shaped and the opposite cut end corners are on the central cutting line y. Forming part.

  Subsequently, the central punched portion (cutting) of each side seal portion 3 of the bag body A shown in FIG. 7, which is punched into a substantially rhombus (）) shape in the web-shaped bag body film 1 shown in FIG. The corners A1, A1, A1, A1 equivalent) and the cutouts at both ends (cutting corners A1, A1 equivalent) of the side seals 3 cut into a substantially V shape are sequentially formed as shown in FIG. When the punching means 21 (the punching press male mold part 21a and the fixed female mold part 21b that move up and down facing each other with the film 1 in between) is reached, the punching means 21 causes each side seal part 3 to In the longitudinal direction, it is punched and cut into a narrow rectangular shape along the center cutting line y. As a result, each of the bags A multifaceted to the web-shaped bag film 1 is provided at each of the four corners of the rectangular flat bag consisting of the bottom seal portion 2, the side seal portion 3, and the opening 4. The bag body A is cut into units each having a cutting corner A1, and stacked on the stacker 16 to complete bag making.

  FIG. 2 (a) is a bag-in-line cutting apparatus according to the present invention, as shown in FIG. 7 described above, a multi-unit rectangular and square rectangular flat bag that is multifaceted to the web-like bag body film 1. FIG. In each of the four corners of the flat bag, the corner cutting means 19 for forming a rounded corner or chamfered inclined side cutting corner A1 and the cutting corner A1 are formed, and then the web-like bag body film 1 is formed. It is a typical top view explaining the relative position with the punching means 21 for dividing | segmenting the side seal part 3 of this into 2 along the center cutting line y, and isolate | separating it as the bag A for every unit. .

  The corner cutting means 19 according to the present invention includes a punching cutting means and a notch cutting means, and is composed of a set male press portion 19a and a female die portion 19b as shown in FIG.

  The press male part 19a and the female part 19b of the punching cutting means are substantially rhombus (◇) by the press shear punching method, as shown in the enlarged plan view of the M part in FIG. 2 (a) and FIG. 2 (b). A rectangular punching blade Cz1 is provided, and an orthogonal difference portion between the central slit line x and the central cutting line y, which is the central portion in the longitudinal direction of the side seal portion 3 of the web-shaped bag body film 1, is substantially rhombus (◇) -shaped. Then, punching is performed such that the opposite corners of the punching tip are on the central slit line x and the central cutting line y, and the cutting corners A1, A1, A1, A1 are respectively formed in the central portions of the side seal portions 3. A central punching portion corresponding to the corresponding portion is formed.

  Further, as shown in FIG. 2A, the press male part 19a and the female part 19b of the notch cutting means include a pair of substantially V-shaped notch blades Cz2 and Cz2 by a press shear notch method. The both ends in the longitudinal direction of the side seal portion 3 of the web-shaped bag body film 1 are cut into a substantially V shape and the notch tip corners are on the center cutting line y, Cut corners A1 and A1 corresponding to both ends are formed at both ends of the part seal part 3, respectively. FIG. 2 (c) shows the cutting corners A1 and A1 corresponding cutouts formed at both ends of the side seal part 3, and then the side seal part 3 is divided into two parts to form a bag A for each unit. FIG. 6 is an enlarged plan view of a cutting corner A1 of the bag A after having been finished.

In the bag-making inline cutting device of the present invention, as shown in FIGS. 2A and 2B, a pair of substantially V-shaped notch blades Cz2 and Cz2 of the notch cutting means constituting the corner cutting means 19 are provided. The pair of V-shaped closed front end corners of the notch blades facing each other in the longitudinal direction of the side seal 3 may be rounded or chamfered.

  Further, in the bag making in-line cutting apparatus of the present invention, as shown in FIGS. 2A and 2B, the substantially diamond-shaped (菱) -shaped punching blade Cz1 of the punching cutting means constituting the corner cutting means 19 is provided. The pair of corners opposed to each other in the longitudinal direction of the side seal 3 may be rounded or chamfered.

  Further, in the bag making in-line cutting apparatus of the present invention, the substantially diamond-shaped punching blades Cz1 of the punching cutting means constituting the corner cutting means 19 are opposed to each other in the longitudinal direction of the side seal portion 3. A pair of corners and a pair of substantially V-shaped notch blades Cz2, Cz2 of the notch cutting means, a pair of V-shaped closing tip corners facing each other in the longitudinal direction of the side seal portion 3; Is for forming the punched portion and the notched portion in the side seal portion 3 on the central cutting line y of the side seal portion 3.

  Further, in the bag making in-line cutting apparatus of the present invention, the substantially diamond (◇) -shaped notch blade Cz1 of the punching cutting means is arranged in the longitudinal direction of the side seal portion 3 with respect to each other as shown in FIG. The shape of the V-shaped open side of the pair of V-shaped corners facing each other is a circular or curved shape projecting inwardly symmetrically with each other to form a bag-corresponding corner portion A1 equivalent portion. It is preferable that each formed corner A1 has a rounded corner shape. However, if necessary, each formed corner A1 has a linear shape, and each formed corner A1 has a chamfered (inclined straight line) shape. Good.

  Further, in the bag making in-line cutting apparatus of the present invention, the pair of substantially V-shaped notch blades Cz2 and Cz2 of the notch cutting means, as shown in FIG. The shape of the V-shaped open side of the pair of V-shapes facing in the direction is a circular or curved shape that protrudes inwardly symmetrically with each other to form a portion corresponding to the bag-making corner A1. It is preferable that each formed corner A1 has a rounded round shape, but if necessary, each formed corner A1 may have a chamfered (inclined straight line) shape. .

  As shown in FIG. 1, the punching means 21 for dividing the side seal portion 3 of the web-like bag body film 1 into two is a central punching that is punched and cut by a substantially diamond-shaped notch blade Cz1. The side seal part 3 formed with a cut-off edge Cz2 and a pair of cut-out edges Cz2 cut by the pair of substantially V-shaped cut-out blades Cz2 and Cz2 is elongated in the longitudinal direction and elongated in the shape of an elongated rectangle. Along the line y, a press male punch portion 21a and a female die portion 21b are formed by a pair of elongated rectangular shapes having a shearing edge for press punching.

  As shown in FIGS. 2 (a) and 2 (b), the punching means 21 has a punching blade Cy composed of a press male part 21 a and a female part 21 b to form a corner cutting means 19. V-shaped closed tip corners of a pair of opposite V-shaped notches cut out at both ends of the side seal portion 3 by a punching cutting means, a central slit line x, and a central cutting line y Narrow along the center cutting line y so as to span a pair of corners facing the center cutting line y of the punched portion punched in a roughly rhombus (◇) shape at the intersecting position The side seal portion 3 is punched out into a rectangular shape. Thus, the side seal portion 3 of the web-shaped bag film 1 after the cutting corner A1 is formed is divided into two.

As a result, the bag is divided into unit bags A each having a cutting corner A1 formed at each of the four corners of a rectangular flat bag comprising a bottom seal 2, a side seal 3 and an opening 4. The bag making is completed. The punching blades Cy (press male mold part 21a and female mold part 21b) of the punching means 21 are integrally and continuously punched so as to cross the central slit line x along the central cutting line y. An extraction blade may be provided, or as shown in FIG. 2 (a), one each may be provided separately on both sides of the central slit line x.

  As shown in the side views of FIGS. 3 (a) and 3 (b), the punching means 21 in the present invention includes a dust collection tank 22 on the fixed female mold portion 21b side of the punching means 21, and a web-like bag body. The thin punched debris generated by punching the side seal portion 3 of the film 1 along the center cutting line y into an elongated rectangular shape is removed from the male mold portion 21a and the female mold portion 21b by air suction and collected. Collect in the dust tank 22. The collection operation into the dust collection tank 22 by air suction is performed by air suction operation during the punching cutting operation of the punching means 21.

  The bag-making inline cutting apparatus of the present invention shown in FIG. 1 includes a pair of press male mold portions 21a and a female punching means 21 for punching the side seal portion 3 into an elongated rectangular shape in plan view by a press shear punching method. As shown in FIGS. 3 (a) and 3 (b), the die portion 21b is moved into and out of the female die portion 21b by the press male die portion 21a being lowered and raised, so that the female portion 21b The web-like bag body film 1 placed over the upper surface is punched into an elongated rectangular shape in plan view.

  As shown in FIGS. 3 (a) and 3 (b), in the present invention, the press male part 21a of the punching means 21 is an elongated rectangular parallelepiped and a flat metal block body in plan view. The lifting and lowering part 21c can be attached to and removed from various sizes. On the other hand, the female mold part 21b having an elongated rectangular space part in plan view can have its inner diameter (space size) changed to various sizes corresponding to the size of the male mold part 21a.

  4 (a) and 4 (b) are plan views for explaining an example of the punching means 21. The female mold portion 21b is a rectangular short side that is punched into an elongated rectangular shape that is the feeding direction of the web-shaped bag body film 1. FIG. The length of the rectangular long side (longitudinal) direction, which is formed by a pair of female blocks 211 and 211 facing each other at an opposing interval v, is punched into an elongated rectangular shape, is a web-shaped bag used for bag making processing The male part 21a, which is set longer than the widths w1 and w2 of the body film 1 and moves up and down, is inserted into the gap v of the female mold part 21b by the lowering action, and the male part 21a and The web-shaped bag body film 1 between the female mold portions 21b is subjected to shear punching.

  4 (c) and 4 (d) are side sectional views of the punching means 21, and the male part 21a stands by above the gap of the opposing distance v of the female part 21b. The female mold portion 21b is installed so that a pair of opposed female blocks 211, 211 are slidable in the horizontal direction of the film feeding direction on the support frame F (along the linear guide F1). The mold block 211 can be positioned at a predetermined position, and the facing interval v can be adjusted to an appropriate gap. This moving operation and positioning can be performed by a motor (servo motor, pulse motor), pneumatic pressure, hydraulic pressure (cylinder operating rod). As a result, the linear punching size punched into the elongated rectangular shape in plan view in the width direction (thrust direction) of the web-like bag body film 1 is reduced to a narrow width size as shown in FIG. As shown in d), it can be adjusted to a wide size.

  Further, in the present invention, the punching means 21 may be configured to be removable and attachable to the bag making processing line of the apparatus of the present invention shown in FIG. Good. The punching means 21 may be attached to another bag making line other than the bag making line of the apparatus of the present invention.

A ... bag body 1 ... web-like bag body film 2 ... bottom seal portion 3 ... side seal portion 4 ... opening 5 ... packaging contents storage portion 12 ... feed roll 13 ... feed roll 14 ... feed film support base 15 ... feed Film support 16 ... Stacker 17 ... Mark sensor 18 ... Slitter 19 ... Corner cutting (punching) means 19a ... Press male mold part 19b ... Fixed female mold part 20 ... Cutting means 20
20a ... Upper blade 20b ... Lower receiving blade 21 ... Linear punching means 21a ... Press male mold part 21b ... Fixed female mold part 21c ... Lifting part 22 ... Dust collection tank

Claims (9)

Multi-layer film with a heat-adhesive inner surface layer is layered and intermittently fed in the longitudinal direction, and heat-sealed at a desired pitch with a heat-seal bar with a built-in heater for each intermittent feed of the film In the bag-making inline cutting method in which the formed multi-faceted bag film is cut continuously with a slit blade and a cutting blade at the heat-seal portion to produce a single bag body continuously,
Perform corner cut punching by corner punching means equipped with a corner cut punching blade arranged after cutting in the longitudinal direction by a slit blade in the feed direction,
Cutting the corner cut punching points by punching means provided with a long, rectangular rectangular shear punching blade whose longitudinal direction is the longitudinal direction with respect to the film feed direction arranged after the corner cut punching and longer than the film width A bag-making inline cutting method for manufacturing a single bag by cutting a line as a center line,
The elongated rectangular shear punching blade of the punching means is a press shear punching system comprising a pair of lifting press male mold parts and a fixed female mold part, and
Of the pair of press male mold part and female mold part of the punching means, the male mold part can be replaced with various widths in the film feeding direction, and
The female portion is Ri changeable der the width of the film Okugyo direction different sizes corresponding to the size of the male part, further,
A bag-making machine comprising a dust collecting tank on the fixed female mold side for collecting the punched residue punched by the punching means by air suction operation during the operation of the punching means. Inline cutting method. The punching Nukite stage, the bag making line cutting method according to claim 1, wherein the film is longitudinally displaceable movable. The overlapping inner surface of the web-like two-layer film to be fed is formed by heat-sealing at equal intervals in the direction orthogonal to the film feeding direction, and a bottom seal portion formed by heat-sealing along both ends of the film width direction A web-like product in which a unitary flat rectangular bag having a side seal portion and an opening formed by slitting the central portion of the film width along the central slit line in the film feeding direction is multifaceted. Provided with a feed roll portion for feeding and supplying the bag film, both sides of the side seal portion in the longitudinal direction between the feed roll portions are substantially V-shaped notch portions and a substantially rhombus (◇) shape at the center portion Cutting means and a corner cutting means for forming a bag body corner corresponding portion, and the side seal portion along the longitudinal direction on the film feed downstream side of the feed roll portion A line cutting device for manufacturing bags equipped with a striking Nukite stage for cutting a rectangular flat bag body per one unit of the web-shaped bag film was divided into two along the central cutting line,
The corner cutting means for forming the bag body corner corresponding portion is formed by cutting the both ends of the side seal portion in the longitudinal direction into a substantially V shape so that the corner of the notch is on the center cutting line. A notch cutting means having a pair of substantially V-shaped notch blades by a press shear notch method comprising a press male die portion and a female die portion of a set forming a body corner equivalent portion;
The press male part of the set that forms the bag body corner equivalent part by punching and cutting so that the center part in the longitudinal direction of the side seal part is approximately rhombus (◇) and the punching tip corner part is on the center cutting line And a punching cutting means by a press shear punching method having a substantially rhombus (◇) -shaped punching blade comprising a female mold part,
The punching means for dividing the side seal part into two parts includes a V-shaped closed tip corner part of the pair of notch parts punched at both ends of the side seal part by punching cutting means, The side seal portion extends over a pair of corners facing the central cutting line of the central punched portion punched in a substantially rhombus (◇) shape at a position where the slit line and the central cutting line intersect. Punching means by a press shear punching method comprising a pair of press male mold part and female mold part having a shearing edge for press punching that punches into an elongated rectangular shape elongated in the longitudinal direction in plan view. ,
Of the set of press male part and female part of the punching means, the male part can be exchanged to various sizes in the width direction of the film feeding, and
The female portion is Ri changeable der the width of the film Okugyo direction different sizes corresponding to the size of the male part, further,
A bag-making machine comprising a dust collecting tank on the fixed female mold side for collecting the punched residue punched by the punching means by air suction operation during the operation of the punching means. Inline cutting device.   A pair of V-shaped notch blades of the notch cutting means and a pair of V-shaped closed tip corners facing each other in the longitudinal direction of the side seal part, and / or an abbreviation of the punching cutting means. 4. A bag-making inline according to claim 3, wherein the pair of corners facing each other in the longitudinal direction of the side seal portion of the rhombus (◇) -shaped punching blade has a chamfered shape and a rounded corner shape. Cutting device.   A pair of corners of the substantially diamond-shaped punching blade Cz1 of the punching cutting means constituting the corner cutting means facing each other in the longitudinal direction of the side seal portion, and a pair of substantially notches of the notch cutting means. A pair of V-shaped closed tip corner portions of the V-shaped notch blades facing each other in the longitudinal direction of the side seal portion are the side seal portion on the central cutting line of the side seal portion. 5. The bag making in-line cutting apparatus according to claim 3, wherein a punching part and a notch part are formed respectively.   The shape of the V-shaped open side of the pair of V-shaped corners facing the longitudinal direction of the side seal portion of the substantially diamond-shaped punching blade of the punching cutting means is a bag making corner. A circular, curved, or linear shape that protrudes inwardly symmetrically with each other to form a corresponding portion, and each formed corner has a rounded corner shape or a chamfer (an inclined straight line) The bag making in-line cutting device according to any one of claims 3 to 5, wherein the in-line cutting device has a shape. The pair of substantially V-shaped notch blades of the notch cutting means has a pair of V-shaped V-shaped open sides facing each other in the longitudinal direction of the side seal portion, which corresponds to a bag-making corner. A circular, curved, or linear shape that protrudes inwardly symmetrically with each other to form a portion, and each formed corner has a rounded corner shape or a chamfered (inclined straight line) shape The bag making in-line cutting device according to any one of claims 3 to 6, wherein The punching Nukite stage is a movable movable in the longitudinal direction of the film, and a pair of press male part of the punching Nukite stage punching the side seal portion by press shearing punching method in plan view elongated rectangular shape Among the female mold parts, the male mold part can change the width in the film feeding direction to various sizes, and the female mold part can change the width in the film feeding direction to various sizes corresponding to the size of the male mold part. The bag making in-line cutting device according to any one of claims 3 to 7.   The bag making in-line cutting apparatus according to any one of claims 3 to 8, wherein the punching means can be attached to and detached from the bag making processing line of the apparatus.

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