JP2011152782A - Streak forming apparatus in square-bottomed bag manufacturing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily move and replace a folding streak forming roller in a streak forming apparatus by reducing the capacity of the roller. <P>SOLUTION: In the streak forming apparatus 5 of the square-bottomed bag manufacturing machine having folding streak forming roller parts 100, 100' inserted into bag paper before folding folding streaks L<SB>4</SB>, L<SB>4</SB>' for folding back one face side of a paper cylinder at the square bottom part, the folding streak forming roller parts are formed of a roller pair 100b for making a folding line serving as a trough folding in one face side of the cylindrically formed bag paper, and a roller pair 100a for making a folding line serving as a crest folding in a gusset part of the other face side of the cylindrically formed bag paper. The respective roller pairs are composed of a plurality of flanges 102a-102f, 102a'-102f', F attached to a shaft separately in the shaft direction. On one of the roller pairs, streak forming blades 103, 106, and on the other, blade receivers 104, 105 receiving the streak forming blades, are stretched and fixed in the shaft direction to the outer peripheral parts of the flanges composing the rollers respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a square-bottom bag making machine that continuously forms a square-bottom bag with a square bottom, such as a shopping bag, and in particular, forms a folding line on the bag paper for folding the square bottom. The present invention relates to a scoring device.

  A sheet feeding device that supplies bag sheets one by one, a creasing device that folds the bag sheets as a square bottom bag, and an M-shaped bag sheet with fold lines on both sides Made of a paper tube forming device that folds into a cylindrical shape having a gusset of gussets, the bottom of the cylindrical paper tube being formed into a square bottom shape by the square bottom forming device along the fold line A bag machine is known in Patent Document 1 and a square-bottom bag making machine is known in Patent Document 2 that forms a bottom of a paper tube formed in advance as described above in a square-bottom shape along a folding line. Yes.

  As an example of a square bottom bag to be produced by the square bottom bag making machine, there is a square bottom bag W used as a shopping bag as shown in FIG. The square bottom bag W has a gusset portion m on both sides thereof, a square bottom portion n on a lower end portion, and a folded portion o on an upper end portion.

  And when making such a square bottom bag W, a crease is made to a bag paper by the said creasing apparatus in the position used as the crease | fold. FIG. 2A shows the bag paper a with the crease. Each fold line is indicated by a dotted line.

In FIG. 2A, L ₁ and L ₁ ′ are gusset back muscles on both sides in the width direction of the square bag W, and L ₂ , L ₂ ′, L ₃ and L ₃ ′ are the above gusset back muscles L _1. , L ₁ ′, the inner and outer gusseted streaks located on both sides, L ₄ , L ₄ ′ are folding bars attached only to one side (back side) of the formed paper tube T, and L ₅ is a bag paper a folded muscles attached over the entire width, L ₆ is a mouth creases to be attached over the whole width in the position where the mouth folding portion.

The gusseted back muscles L ₁ , L ₁ ′, the inner and outer gusseted muscles L ₂ , L ₂ ′, L ₃ , L ₃ ′ are provided along the entire length in the longitudinal direction of the bag paper a. Further, as described above, the folding lines L ₄ and L ₄ ′ are attached only to one side (back side surface) of the formed paper tube T, so that the shorter folding line L ₄ on the edge side is formed on the bag paper a. is from gusset back muscle L ₁ of the gusseted portion positioned in the width direction edge to edge of the bag sheet a, folding Kaesuji the longer of the back side L _{4 'is} gusseted portion positioned in the widthwise central side of the bag sheet a It is the length from the gusset back line L ₁ ′ to the other side edge of the bag paper a.

  2B to 2E show the steps when the square bottom bag W is formed by folding along each folding line.

  In the conventional square-bottom bag making machine, the creasing device for attaching each folding line shown in FIG. 2 is as shown in FIG. 3 and FIG. 4, and this creasing device A is a paper feeding device. The bag paper “a” that has been conveyed from is conveyed downstream by a roller conveyor “e”. The creasing device A has a gusset creasing roller portion f, a folding creasing roller portion g, a folding creasing roller portion h, and a mouth fold creasing roller portion i from the upstream side thereof.

In each of the above roller portions, the gusset creasing roller portion f is a pair of gusseted back crease rollers f ₁ , f ₁ ′, f ₃ , f ₃ ′ on both sides in the width direction, and an inner gusset creasing roller pair f ₂ on both sides in the width direction. f ₂ ′ and a pair of outer gusseted rollers f ₃ and f ₃ ′. Further, the folding creasing roller part g has a folding creasing roller pair g ₁ , and the folding creasing roller part h has a folding creasing roller pair h ₁ on the near side and a folding creasing roller pair h ₂ on the far side. ing. The mouth creases with roller unit i is made from the mouth creases with rollers i _1.

Then, the bag paper “a” crooked by the creasing device A is first formed by the paper tube forming device, as shown in FIG. 2 (b), and the inner gussets L ₂ , L ₂ ′. 2 and the gusseted back muscles L ₁ and L ₁ ′ are folded in a Z shape, and then, as shown in FIG. 2 (c), along the outer gusseted muscles L ₃ and L ₃ ′, the margin on the near side and the other side folded portions with folded inwardly of, become an edge are coated with a previously glue b ₁ of the tip of the clamshell portion to the paper tube T is folded formed by bonding the margin adhesion of the front side ing.

Thereafter, as shown in FIG. 2D, the paper tube T is folded upward along the folding lines L ₄ and L ₄ ′ of the upper bag body (rear surface) with a square-bottom forming device, thereby causing the upper and lower flaps F to be folded. ₁ and F ₂ are formed, and then glue b ₂ is applied to the inside of the upper and lower flaps F ₁ and F ₂ , and then both flaps are formed along the folding lines L ₅ and L ₅ ′ as shown in FIG. F ₁ and F ₂ are folded and bonded together.

The square bottom bag W shown in FIG. 1 is formed by the process as described above. At this time, the folding lines L ₄ and L ₄ ′ are attached only to one surface (back surface) of the paper tube T and not to the other surface. ₄ and L ₄ ′ remain only on one side (back side), and no streak remains on the other side.

Each line of the bag paper a shown in FIG. 2 (a) becomes a mountain fold line and a valley fold line depending on the folding direction when it becomes a paper tube. In this figure, the gusset back lines L ₁ , L ₁ 'and the folding muscles L ₄ and L ₄ ' are mountain folds, the left and right inner and outer gusseted muscles L ₂ , L ₂ ', L ₃ and L ₃ ', the folding muscle L ₅ and the mouth folding muscle L ₆ are It is a valley fold. In each of the roller pairs shown in FIG. 4 used for these creasing, the blade portions of each roller indicated by dotted lines are for mountain folds having convex blades on the lower roller, indicated by solid lines. The one is for valley folding where the upper roller has a convex blade. The folding lines L ₄ and L ₄ ′ are provided in a mountain fold shape as described above in the bag paper state before folding, but the portion with the longer folding line L ₄ ′ is shown in FIG. By folding as shown, this longer folding line L ₄ ′ becomes a valley fold, and the upper flapper F ₁ in the step shown in FIG. 2D is easily bent upward.

Both the roller pairs h ₁ and h ₂ of the folding line adding roller portion h can be aligned in the axial direction, and the interval in the width direction of the lines can be changed. The other roller pairs are also fixed so as to be movable in the axial direction so that they can be aligned in the axial direction. In each roller pair, the convex blade is made of steel, but the receiving blade is made of rubber.

JP 2007-144993 A JP 2006-224515 A

Solid rollers are used as the respective roller pairs h ₁ , h ₂ of the folding creasing roller portion h of the creasing device A in the conventional square bottom bag making machine. Since the circumferential length is the length of the bag paper a in the vertical direction, the diameter of each roller is increased and the weight of the roller is increased. Therefore, when the rollers are moved to align each roller pair, A large force is required, and the replacement work performed when the width of the bag paper a is changed is difficult.

  The present invention has been made in view of the above, and it is possible to reduce the weight of each roller pair of the folding back roller section, and to easily move the bag sheet in the width direction, and to change the size of the bag sheet. It is an object of the present invention to provide a creasing device in a square bottom bag making machine capable of easily aligning the folding creasing roller portion.

  In order to achieve the above object, a creasing device in a square bottom bag making machine according to the present invention is a folding creasing roller for putting a folding line for folding one side of a paper tube at a square bottom portion into bag paper before folding. In the scoring device of a square bottom bag making machine having a portion, a pair of rollers for inserting a folding line that forms a valley fold on one side of the bag paper after forming the folding creasing roller part into a cylindrical shape of the bag paper, and a cylinder Each roller pair is composed of a plurality of flanges that are attached to the shaft with axially spaced apart pairs of rollers. One of the blades has a scoring blade, and the other has a blade receiver that receives the scoring blade.

  In the above scoring device, each flange constituting each roller pair can be moved in the axial direction, and the position can be adjusted in the rotational direction.

In addition, a crease blade for diagonal gussets is provided on the crease blade of each roller pair.
Then, a roller pair for inserting a valley fold line on one side after forming into a cylindrical shape of the bag paper, and a roller pair for inserting a mountain fold line crease in the gusset portion on the other side after forming into a cylindrical shape The position of the bag paper is shifted in the running direction, and each roller pair is movable in the axial direction.

  Further, a disc-like spacer for receiving bag paper traveling between the roller pairs is fixed to the shaft between the flanges of the rollers positioned below the roller pairs.

  According to claim 1 of the present invention, in the creasing device of the square bottom bag making machine, each pair of the folding creasing roller portions is constituted by a plurality of flanges attached to the shaft so as to be separated in the axial direction. As a result, the weight of each roller pair of the folding line creasing roller portion is reduced, the bag sheet can be easily moved in the width direction, and the positioning of the folding line creasing roller portion at the time of size conversion is easily performed. be able to.

  According to the second aspect of the present invention, it is possible to easily align the folding reed roller portion in the axial direction by moving the flanges in the axial direction.

  According to the third aspect of the present invention, since the crease of the gusset portion can be inserted into the folding line, it is possible to facilitate the formation of the corner bottom during the corner bottom molding. According to the fourth aspect of the present invention, the fold line forming roller pair of the gusset portion can be moved in the axial direction for each fold line of each gusset portion, so that it is formed at two locations on both sides of the square bottom bag. The position of the folding line for the gusset portion can be individually adjusted.

  Furthermore, according to claim 5, a disk-like spacer is provided between the flanges of the lower rollers of the roller pair constituted by a plurality of flanges so as to be fixed to the shaft. It is possible to prevent sagging deformation of the bag paper traveling on the road.

It is a perspective view which shows the square bottom bag which makes a bag with a square bottom bag making machine. (A), (b), (c), (d), (e) is a bag making process diagram of a square bottom bag using a lined bag paper. It is a front view which shows the conventional creasing apparatus schematically. It is a top view which shows the conventional creasing apparatus roughly. It is a schematic explanatory drawing of the square bottom bag making machine provided with the square bottom bag making machine which concerns on this invention. It is a front view which shows a scoring apparatus roughly. It is a top view which shows a scoring apparatus roughly. It is a front view which shows roughly the folding | returning creasing roller part which concerns on this invention. It is sectional drawing which shows the coupling | bond part of a flange and a shaft. FIG. 10 is a partially broken cross-sectional view taken along arrow X in FIG. 9. It is an enlarged partially broken sectional view which shows the creasing apparatus of a folding | returning creasing roller part. It is a front view which shows a spacer. It is a front view which shows the state which made the folding | returning creasing roller part into a cassette shape, and was integrated in the creasing apparatus part. It is a perspective view which shows the bag paper folded by putting the diagonal crease in a gusset part. It is a front view which shows roughly the folding | returning creasing roller part which made it insert a diagonal crease in a gusset part.

  The creasing apparatus in the square bottom bag making machine according to the present invention will be described below.

  FIG. 5 shows a paper feeding device 4 that feeds the bag paper a in order from the upstream side to the upstream side of the square bottom forming device 1, a creasing device 5 that folds the fed bag paper a, 1 schematically shows a square bottom bag making machine 2 provided with a paper tube forming device 6 that folds a lined bag paper a along a folding line into a cylindrical shape.

  The square bottom forming device 1 includes a bottom opening device 77 that performs bottom opening processing while the paper tube T formed by the paper tube forming device 6 moves along the bottom folding drum 78, and glue on the flap surface that has been opened. A paste applying device 79 for applying the paper, a bottom closing device 80 for folding the flap and closing the bottom, and a delivery device 81 for discharging the paper tube closed by pressing the bottom.

  The scoring device 5 is configured as shown in FIGS. 6 and 7, and the bag paper a conveyed from the paper feeding device 4 is conveyed downstream by the roller conveyor 23. The creasing device 5 includes a gusset creasing roller portion 24, a folding creasing roller portion 25, a folding creasing roller portion 100, and a mouth fold creasing roller portion 28 from the upstream side thereof. Moreover, the press apparatus 29 and the glue application | coating apparatus 30 are provided in the most downstream part of this.

  In each of the above-mentioned roller portions, the other roller portions except for the folding crease roller portion 100 have the configuration of the crease roller portion shown in FIGS. 3 and 4 for attaching each stripe of the bag paper a shown in FIG. It is almost the same. The gusset creasing roller section 24 includes gusset back crease roller pairs 24a and 24a 'on both sides in the width direction, inner gusset scoring roller pairs 24b and 24b' on both sides in the width direction, and roller pairs 24c and 24c 'on the outer gusset lines. ing. Further, the folding creasing roller section 25 includes a folding creasing roller pair 25a, and the mouth folding creasing roller section 28 includes a mouth folding creasing roller pair 28a.

  In each roller pair of the scoring device 5, the blade portion of each roller is indicated by a dotted line for a mountain fold having a convex blade on the lower roller, and the one indicated by a solid line is a convex blade on the upper roller. There is for valley folding. The pair of rollers 100a and 100b of the folding line attaching roller unit 100 can be aligned in the axial direction, and the interval in the width direction of the lines can be changed. The other roller pairs are also fixed so as to be movable in the axial direction so that they can be aligned in the axial direction. In each roller pair, the convex blade is formed of a steel material, but the receiving blade is formed of a rubber material.

  The folding line roller section 100 is composed of a gusset part folding line roller pair 100a located on the near side and a back surface folding line roller pair 100b located on the other side. Each of the roller pairs 100a and 100b is configured as shown in FIGS. 7 and 8, and two rollers are arranged so as to be separated from each other in the vertical direction so that the opposing peripheral surfaces can be reversely rotated in synchronization with the traveling direction of the bag paper. A plurality of flanges (disks) that are attached to the respective shafts 101a and 101b in the axial direction and are slightly separated from each other in the vertical direction and rotate in reverse to each other, and the outer peripheral portions of the plurality of flanges span the axial direction. It consists of a fixed scoring blade and a blade receiver, and these configurations will be described in the embodiment shown in FIGS.

  In FIG. 8, the gusset portion folding line pair 100a is separated in the axial direction from two upper flanges 102a and 102b fixed to the upper shaft 101a in the axial direction and to the lower shaft 101b. Two fixed lower flanges 102a 'and 102b', a bracing blade 103 stretched around the outer periphery of the upper flanges 102a and 102b, and spanned around the outer periphery of the lower flanges 102a 'and 102b' It consists of a fixed blade receiver 104.

  The pair of back folding rollers 100b is fixed to the four upper flanges 102c, 102d, 102e, and 102f fixed to the upper shaft 101a in the axial direction and to the lower shaft 101b in the axial direction. The four flanges 102c ', 102d', 102e ', 102f', the blade receiver 105 that is fixed around the outer periphery of the upper flanges 102c-102f, and the outer periphery of the lower flanges 102c'-102f ' It consists of a creasing blade 106 that is stretched over the part.

Each of the scoring blade 103 provided on the upper shaft 101a side and the blade receiver 105 of the back folding back roller pair 100b is arranged in a straight line, and the blade receiver 104 provided on the lower shaft 101b side and the streaks. Each of the attachment blades 106 is formed in a straight line, and each scoring blade and the blade support rotate in the vertical direction according to the rotation of both shafts 101a and 101b, so that the gusset portion of the traveling bag paper a is formed. trough-shaped gore folding Kaesuji L ₄ is also folded Kaesuji L ₄ of the rear surface side of the mountain-shaped on the back when a paper tube _'is adapted to be formed in a straight line.

  The mounting configuration of the flanges to the shafts 101a and 101b is the same, and the configuration will be described with reference to FIGS. The flanges F are fitted to the shafts 101a and 101b so as to be movable in the axial direction, and the flanges F are movable in the axial direction like the flanges F and rotated by the key member 108a. It is fixed by a bolt 109 to a collar 108 that is engaged in a direction and can be fixed at an arbitrary position by a screw 107. The bolt through hole 109a provided in the collar 108 is formed in an arc shape so that the bolt 109 penetrates, and the flange F is adjusted in the circumferential direction with respect to the axis along the bolt through hole 109a of the collar 108. It is possible.

  The mutual attachment configuration of the crease blades 103 and 106 and the mutual attachment of the respective blade receivers 104 and 105 of the gusset portion folding fold roller pair 100a and the back surface fold line roller pair 100b are the same. Will be described with reference to FIG.

  The scoring blades 103 and 106 are divided into two split fixing materials 111a and 111b that fit into a square groove 110 provided on the outer peripheral portion of the flange F, and a blade 112 sandwiched between the split fixing materials 111a and 111b. The adjusting screw 113 is provided on one of the divided fixing members 111b and adjusts the protruding height of the blade 112 by making one end abut against the bottom surface of the square groove 110 and adjusting the protruding height. And a fixing screw 114 that is provided on the flange F and presses the divided fixing members 111a and 111b in the clamping direction of the blade 112 and fixes the divided fixing members 111a and 111b to the flange F.

  The blade receivers 104 and 106 have a base member 116 fitted in a square groove 115 provided on the outer peripheral portion of the flange F, and a blade having elasticity such as a rubber material fitted in a groove provided on the surface side of the base member 116. The cradle 117 is configured so that the tips of the blades 112 of the creasing blades 103 and 106 come into contact with the blade cradle 117. Reference numeral 118 denotes a set screw for fixing the base member 116.

  The square groove 110 in which the scoring blades 103 and 106 provided on each flange F are fitted and the square groove 115 in which the blade receivers 104 and 105 are fitted are the same, and the scoring blades 103 and 106 and the blade receiver 104 are the same. 106 can be interchanged, and a plurality of flanges can be used in common.

  A spacer 119 having the same diameter as that of the flange is attached by a mounting collar 120 between the flanges of the folding line roller unit 100, and the bag paper a passing through the folding line roller unit 100 is transferred by the spacer 119. It is designed to support between the flanges from below. As shown in FIG. 12, the spacer 119 and the mounting collar 120 are provided with a notch 121 through which the shaft 101 b passes in the radial direction, and the mounting collar 120 is attached to the bolt 122 in a state of being fitted to the shaft 101 b through the notch 121. And is fixed to the shaft 101b.

  At intermediate portions of the upper and lower shafts 101a and 101b, support rollers 123 and 124 for preventing deflection of the respective shafts are in rolling contact.

  The folded folding roller section 100 described above may be configured to be incorporated in the creasing apparatus 5 as shown in FIGS. 6 and 7, but as shown in FIG. 13, the folded folding roller section 100 in the form of a cassette. It can be added to the creasing device of the existing square bottom bag making machine.

In the bag sheet a shown in FIG. 2 shows the side to add only folding muscle L ₅ parallel fold Kaesuji L _4, L 4 _', as shown in FIG. 14, Orikaesuji L _4, L The formation of the square base can be facilitated by inserting gusseted oblique muscles L _7a , L _7b , L _7a ′, L _7b ′ at the ₄ ′ gusset side end.

  FIG. 15 shows an example of a configuration in which the above-mentioned gusseted diagonal stripes can be inserted.

  In the figure, reference numeral 125 denotes a pair of gusset folding lines, 126 denotes a back folding roller pair, and both the roller pairs 125 and 126 are arranged with a predetermined phase shifted in the traveling direction of the bag paper a. .

  In the gusset-part folding roller pair 125, a square holder 129 is attached to two flanges 128a, 128b attached to the upper shaft 127a, and the parallel bracing blade 130a and the gusset part are inclined on the surface of the square holder 129. A flexible die 130 having scoring blades 130b and 130c is attached and fixed with an adhesive tape. On the other hand, a cradle 131 for receiving the flexible die 130 is attached to the two flanges 128a ′ and 128b ′ attached to the lower shaft 127b.

  In the back folding bar pair 126, a square holder 134 is attached over four flanges 133a, 133b, 133c, and 133d attached to the lower shaft 132a, and a parallel reinforcing blade 145a is attached to the surface of the square holder 134. And a flexible die 145 having gusseted diagonally striated blades 145b and 145c are fixed by adhesive tape. On the other hand, a pedestal 146 for receiving the flexible die 145 is attached over the four flanges 133a ′, 133b ′, 133c ′, and 133d ′ attached to the upper shaft 132b.

In this configuration, the roller pairs 125 and 126 are driven synchronously, so that, for example, the gusset-side folding line L ₄ and the gusset-side folding line L ₄ in FIG. part oblique muscle L _7a, L _7b is attached, and then become the same linear and folding Kaesuji L ₄ of the upper gusset side at the back surface folding return creasing roller pair 126 located downstream, folding surface side Kaesuji L ₄ ′ And gusseted diagonal stripes L _7a ′, L _7b ′.

At this time, if the vertices of the gusseted diagonal stripes L _7a , L _7b , L _7a ′, L _7b ′ do not exactly match the traveling direction of the bag paper a and the direction perpendicular to the traveling direction, the molding of each bottom Cannot be done smoothly. Therefore, sidelay devices 146a and 146b are provided on one side in the axial direction of each roller pair 125 and 126, and the respective handle pairs 147a and 147b are rotated to shift the position of each roller pair 125 and 126 in the axial direction. The position can be adjusted in the axial direction. Further, the position adjustment of the bag paper “a” in the traveling direction (vertical direction) is performed by adjusting the rotational phase of both roller pairs 125 and 126.

  In the embodiment shown in FIG. 15, an example is shown in which the gusset portion folding line roller pair 125 and the back surface folding line roller pair 126 are displaced in the traveling direction of the bag paper a. As in the embodiment shown in FIG. 8, the upper and lower shafts 126 may share the same position in the traveling direction of the bag paper a.

In this case, for example, the pair of surface folding lines can be moved in the axial direction by the side array device so that the vertices of the gusseted diagonal lines L _7a , L _7b , L _7a ′, L _7b ′ can be aligned. In other words, the gusset portion folding line pair of rollers is manually moved in the axial direction. Further, the rectangular holder 129 and the pedestal 131 of the pair of gusset folding lines that are shorter in the axial direction may be supported by one flange.

Therefore, in this creasing device 5, the gusset creasing lines L ₁ , L ₁ ′ on both sides and the inner and outer gusseted muscles L ₂ , L _{2 in the} pair of rollers of the gusset creasing roller section 24 on the bag paper a. ′, L ₃ , L ₃ ′ are attached, and the folding line L ₅ is attached at the folding line attaching roller part 25 and the mouth folding line L ₆ is attached at the mouth folding line attaching roller part 28 as shown in FIG. . At this time, in each roller pair, it was possible to attach a streak that easily breaks because the receiving blade is a rubber material with respect to the convex blade made of steel.

7 to FIG. 12, in the folding line attaching roller part 100 according to the embodiment, the folding line L ₄ on the gusset part side is attached in a valley shape, and the folding line L ₄ ′ on the back side is attached in a mountain shape. Further, as shown in FIG. 14, in the folding line attaching roller unit 100 according to the embodiment shown in FIG. 15, in addition to the above two folding lines L ₄ , L ₄ ′, gusseted diagonal lines L _7a , L _7b , L _7a ′ and L _7b ′ are attached in a valley shape and a mountain shape, respectively.

  As shown in FIG. 2A, the crease line is attached to the bag paper a fed from the paper supply device 4 as described above.

As shown in FIG. 2 (b), for example, the gusset streaks on the inner side of the bag paper a to which each crease is attached is formed in the paper tube forming device 6 in the square bottom bag making machine shown in Patent Document 1. L ₂ , L ₂ ′ and gusset back muscles L ₁ , L ₁ ′ are folded in a Z shape, and then, as shown in FIG. 2 (c), the front side along each outer gusset muscle L ₃ , L ₃ ′ And the other side of the folding part is folded inward, and the edge to which the glue b ₁ is applied in advance by the glue application device 30 at the tip of the folding part is bonded to the pasting margin of the front side. Thus, the paper tube T is folded and formed.

  The paper tube T folded and formed as described above has its square base formed by the square base forming apparatus 1 shown in FIG. As this corner bottom forming device 1, for example, the one described in Patent Document 2 is used as an example.

100, 100 '... Folding creasing roller section, 100a, 125 ... Machi part folding creasing roller pair, 100b, 126 ... Back folding cladding roller pair, 101a, 101b ... Shaft, 102a, 102b, 102c, 102d, 102e, 102f, 102a ', 102b', 102c ', 102d', 102e ', 102f', F ... flange, 103, 106 ... creasing blade, 104, 105 ... blade receiver, 107 ... screw, 108 ... collar, 108a ... key , 109 ... bolts, 109 a ... bolt through holes, 110, 115 ... square grooves, 111 a, 111 b ... split fixing materials, 112 ... blades, 113 ... adjustment screws, 114 ... push screws, 116 ... base members, 117 ... blade holders , 118 ... push screw, 119 ... spacer, 120 ... collar, 121 ... notch, 122 ... bolt, 123, 124 Support roller, 127a, 127b, 132a, 132b ... shaft, 128a, 128b, 128a ', 128b' ... flange, 129, 134 ... square holder, 130, 145 ... flexible die, 130a, 145a ... parallel staggered blade, 130b, 130c, 145b, 145c... Diagonal gusseted blades, 131. …handle,
a ... bag paper 1 ... square bottom forming device 2 ... square bottom bag making machine 4 ... paper feeding device 5 ... creasing device 6 ... paper tube forming device 23 ... roller conveyor 24 ... gusset creasing roller section 24a, 24a '... Left and right gusset back roller pair 24b, 24b '... Left and right inner gusset roller pair 24c, 24c' ... Left and right outer gusset roller pair 25 ... Folding bar roller unit 25a ... Folding bar roller unit 26 ... Inclined gusset roller portion 26a, 26b, 26c, 26d, 26e ... Inclined gusset roller pair 26f, 26g ... Shaft 28 ... Folding crease roller portion 29 ... Press device 30 ... Glue application device 77 ... Open bottom 78 ... bottom folding drum 79 ... glue 80 ... bottom closure device 81 ... delivery device _{L 1,} L ₁ '... on both sides of the gusset inner muscle _{L 2,} L _2' ... on both sides of the inner gusset muscle _{L 3,} L ₃ ' Both sides of the outer gusset muscle _{L 4,} L ₄ '... Orikaesuji L 5 _... folding muscle L 6 _... mouth creases _{L 7a, L 7b, L 7a} ', L 7b '... gusseted portion obliquely muscle

Claims (5)

In the scoring device of the square bottom bag making machine having the folding line scoring roller part for putting the folding line for folding one side of the paper tube at the corner bottom part into the bag paper before folding,
The folding crease roller part
A pair of rollers for forming a crease that forms a valley fold on one side of the bag paper after forming into a cylindrical shape, and a pair of rollers that inserts a crease that forms a fold at the gusset on the other side after forming into a cylindrical shape age,
Each roller pair is composed of a plurality of flanges attached to the shaft separated in the axial direction,
A square-bottom bag bag characterized in that a creasing blade is received on one side of each roller pair, and a blade receiver that receives the scoring blade on the other side is axially stretched around the outer peripheral portion of the flange constituting the roller. The creasing device in the machine.   2. The creasing device for a square bottom bag making machine according to claim 1, wherein each of the flanges constituting each roller pair is movable in the axial direction and can be adjusted in the rotational direction.   The creasing device for a square bottom bag making machine according to any one of claims 1 and 2, wherein the creasing blade is provided with a creasing blade for gusseted diagonal muscles. A pair of rollers for inserting valley folds and diagonal gussets on one side after forming into a cylindrical shape of bag paper, and mountain folds and gussets on the gusset on the other side after forming the cylinder Roller pair to insert the diagonal line,
4. The creasing device for a square bottom bag making machine according to claim 3, wherein each of the pair of rollers is movable in the axial direction while being shifted in the running direction of the bag paper.   5. A disc-like spacer for receiving a bag of paper traveling between the roller pairs is provided between the flanges of the rollers located below the roller pairs and fixed to the shaft. The creasing device of the square bottom bag making machine according to any one of the above.

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