JP3621164B2 - Folding device for bag making filling and packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a web is wound while being fed out along a cylindrical body for bag making, and is vertically sealed by a vertical sealing device to form a cylinder, and a fold is attached to the longitudinal direction of the web by a crease fold means to hang down. A crease of a bag-filling and packaging machine that forms a rectangular tubular bag body by laterally sealing the cylindrical web to be widthwise by a lateral seal device and filling the packaged article through the bag-making cylinder body Relates to the device.
[0002]
[Prior art]
Conventionally, as a creasing device for this type of bag making filling and packaging machine, for example, as disclosed in FIG. The roller is rotatably disposed so as to face the right-angled ridge angle of the rectangular tube portion, and the right-angle groove that fits the right-angled ridge angle is recessed in the outer peripheral surface of the roller, By sandwiching a cylindrical web wound in a square tube shape along the section between a right-angled ridge angle and a right-angle groove of a roller, the part facing the ridge angle of the web is bent at a right angle to make a crease There is.
Further, as disclosed in FIGS. 3 to 8 of the publication, four bag-shaped folding guide pieces project from the cylindrical portion to the bag-making cylinder, and both side surfaces of these folding guide pieces are provided. A pair of rollers for sandwiching and bending are rotatably disposed opposite to each other to form a rectangular tube-shaped rectangular tube portion continuous with the cylindrical portion of the bag-making cylinder, and the rectangular tube portions are opposed to each other. A groove is provided in the center of the pair of side surfaces, a roller is rotatably disposed opposite to the groove, a protrusion that fits the groove is provided on the outer peripheral surface of the roller, and a cylinder is formed along the cylindrical portion. By sandwiching the cylindrical web wound in a shape between the bending guide piece and the pair of rollers, the portion of the web facing the bending guide piece is bent to a slight angle and then creased, When the crease faces the right-angled ridge angle of the rectangular tube part by feeding the web, it expands at a right angle. The gusset type packaging bag is produced by sandwiching between the groove and the protrusion of the roller so that the portion facing the center of the opposite side of the web is bent inward so as to protrude inward. is there.
[0003]
[Problems to be solved by the invention]
However, in the case of the crease device of such a conventional bag making filling and packaging machine, in the former case, the web is sandwiched between the right ridge angle of the rectangular tube portion and the right groove of the roller, and then folded at a right angle. Because the crease is attached, the crease may not be attached reliably if the folds are insufficient, the crease is weak, the web material is flexible, or the adverse conditions such as thick thickness overlap. As a result, there is a problem that the appearance of the bag body is poor and the commercial value is lowered.
Therefore, multiple types of square tube parts with different ridge angles and multiple types of rollers with different groove angles are prepared, and the ridge angle and roller groove of the square tube part are exchanged according to the material and thickness of the web. Therefore, it is possible to adjust the bending angle to an optimum angle.
However, in this case, since it is necessary to replace the entire bag-making cylinder in which the square tube portions are continuously provided, it is only costly to produce a replacement bag-making cylinder. However, there is a problem that the replacement work is difficult and troublesome.
In the latter case, since the web is sandwiched between the folding guide piece and the pair of rollers to make a crease, the structure of the fold folding means is complicated and expensive, and the front end of the bending guide piece of the web In addition to the crease on the part facing the roller, the part of the web facing the cylindrical part of the roller is bent at an angle close to a right angle along it, so an extra crease is easily formed, and as a result, the bag There is a problem that the appearance of the body is bad and the commercial value is lowered.
In order to prevent unnecessary creases, for example, when the protruding amount of the bending guide piece is reduced so that the portion of the web facing the cylindrical portion side end of the roller is slack, the web is positioned along the cylindrical portion. There is a problem that misalignment is likely to occur, and the crease may not be accurately aligned with the perpendicular ridge angle of the rectangular tube portion due to the subsequent feeding of the web.
[0004]
The invention described in claim 1 of the present invention is intended to accurately and surely crease only a portion where the crease of the web is necessary regardless of changes in conditions such as the material and thickness of the web. . In addition to the object of the invention described in claim 1, the invention described in claim 2 has no relation to changes in conditions such as the material and thickness of the web,In addition, the folds can be stably attached without causing misalignment such as meandering.The object is to produce a gusset-type packaging bag having an excellent appearance. In addition to the object of the invention described in claim 1 or 2, the invention described in claim 3 can be securely attached by simple adjustment according to the material and thickness of the web, and can be easily adjusted. It is intended to be applied stably over a long period of time.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that the fold folding means is formed on the bag making cylinder.A rectangular tube having front and rear surfaces and left and right side surfacesOf the square tubeeachFrom the edge of the ridgeProjects parallel to the front and rear surfaces of the rectangular tube portion on the side of the bag-making cylinder and extends along the ridge angle line.Sharp V-shapeofA V-shaped protrusion,Each outside of the square tubeV-shaped projection andArranged opposite each otherFree to rotateNarollerAnd for each rollerConcave on the outer peripheral surfaceAnd saidV-shaped projectionIs fittedV-shaped grooveAnd consist of,AndTowards the V-shaped projectionCorresponding via rollerPress the V-shaped grooveFirstPressing meansWhen,thisFirstAdjust the pressing force of the pressing meansFirstAdjustment meansWhenThePreparedIt is characterized by this.
[0006]
The invention described in claim 2 is described in claim 1.ofTo the configurationin additionThe fold folding means isBelow the roller,Square tubeLeft and rightRecessed in the center of each sideWasV-shaped grooves and each of these V-shaped groovesArrangedFree to rotateNaA roller,These rollersProjecting on the outer peripheral surface ofCorresponding to the square tube partV-shaped grooveFit intoWith a sharp V-shaped projection of V-shapeMoreHaveAnd the square tube partTowards the V-shaped grooveCorresponding via rollerPress the V-shaped protrusionSecondPressing meansWhen,thisSecondAdjust the pressing force of the pressing meansSecondAdjustment meansAnd further equippedIt is characterized by that.
[0007]
The invention described in claim 3 is described in claim 1 or 2.ofTo the configurationin addition,The fold folding means is detachably attached to the front and rear surfaces of the square tube portion, and the guide plate having both side edges formed as V-shaped projections of the square tube portion and the left and right side surfaces of the square tube portion are detachably attached. And a plate member (3) having a V-shaped groove (3a) in the rectangular tube portion, and the first pressing means is swingably supported to detachably support each roller having the V-shaped groove. The second pressing means includes a swingable lever member that removably supports each roller having a V-shaped protrusion.It is characterized by that.
[0009]
[Action]
The invention of claim 1 corresponds to the material and thickness dimension of the web.FirstBy adjusting the adjusting means, the pressing force of the V-shaped groove toward the V-shaped projection is adjusted, and in this state, the cylindrical web wound in a rectangular tube shape along the rectangular tube portion of the bag-making cylinder is A sharp V-shaped protrusion that protrudes from the ridge edge of the rectangular tube portion, and the V-shaped protrusionIs fittedBy passing between the V-shaped groove,Square tubeOpposite the corner edgeWebPartBetween the V-shaped protrusion and the V-shaped groovePinchingInBend outward at a sharp angle, This makes the webA crease is made.
[0010]
The invention of claim 2In addition to being creased in the web along each ridge corner edge of the square tube,Corresponding to the material and thickness of the webSecondBy adjusting the adjustment means,The left and right sides of the square tubeThe pressing force of the V-shaped projection toward the V-shaped groove is adjusted, and in this state, the rectangular tubular shapeWhen the web passes between the V-shaped groove and the V-shaped projection on the left and right side surfaces of the rectangular tube portion, the center of both sides of the web is sandwiched between the V-shaped groove and the V-shaped projection and inward. Bend at an acute angle, so that both sides of the webA crease is made.
Further, in the invention of claim 2, since the V-shaped grooves on the left and right side surfaces of the rectangular tube portion are arranged on the downstream side of the web feeding direction rather than the roller cooperating with the V-shaped projection of the rectangular tube portion, After the web is bent outward along the ridge corner edge of the rectangular tube portion and creased, these folds are positioned by engaging with the V-shaped projections of the rectangular tube portion. Bends inward and creases are made on these sides.
[0011]
The invention of claim 3A guide plate having a V-shaped protrusion and a plate member having a V-shaped groove are detachably attached to the square tube portion, and a roller having a V-shaped groove and a V-shaped protrusion is also attached to and detached from the corresponding lever. Because it is supported as possible,Compatible with web materials and thickness dimensionsA guide plate, a plate member, and a roller having V-shaped projections and V-shaped grooves having the angles as described above are prepared in advance, and the web is folded by selecting and using them.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIGS. 1 to 4, the web A is fed out by the intermittent operation of the feeding means D such as a belt disposed opposite to the rectangular tube portion B2 of the bag-making cylinder B. It is wound around the cylindrical part B1 of the bag cylinder B, and its both side edges are overlapped and sandwiched by the vertical seal device E, so that it is vertically sealed in the longitudinal direction to form a cylinder. For example, in JP-A-2-152630 As described, a pair of opposing side surfaces A1 and A1 of the cylindrical web A that hangs from the lower end of the rectangular tube portion B2 is formed in an isosceles triangle inward by the projection of the plane isosceles triangular folding pieces F and F. The bottom portion of the bag body A2 before being filled with the enveloping article is formed in a planar square shape, and the upper part of the preceding bag body A3 after being filled with the continuous enveloping article below is formed, Due to the protrusion of the folding sheets G, G extending vertically After the folding, the pair of horizontal sealing devices H sandwich the bottom of the bag body A2 and the upper part of the bag body A3, thereby simultaneously performing horizontal sealing in the width direction, and these upper and lower horizontal sealing portions A4, A5. The gusset square bottom type packaging bag shown in FIG. 5 is produced by protruding and cutting the cutter I in between.
[0014]
The bag-making cylinder B has a cylindrical part B1 formed at the upper part thereof, and a rectangular cylindrical part B2 is formed continuously from the cylindrical part B1 to the downstream side in the feeding direction of the web A. The part B2 includes a pair of parallel side surfaces B3, B3 facing in the front-rear direction perpendicular to the axial direction of the bag-making cylinder B, and another set of parallel side surfaces B4, B4 facing in the left-right direction; . And the lateral width dimensions of the side surfaces B3, B3 are formed so that the upstream side in the web feed direction is slightly smaller than the downstream side, and from the intermediate position to the downstream end. The side surfaces B4, B4 and the ridge angle edge B5... Are inclined so as to gradually protrude in the left-right direction from the upstream side and the intermediate position toward the downstream end. Near the upstream end of the cylinder part B2, Fold in the longitudinal direction of the A C1 ..., arranging the folds folding means C put C2, C2.
[0015]
The fold folding means C is the ridge angle edge B5The V-shaped projections 1a projecting in an acute V-shape from the upstream side to the left-right direction and the rollers 2 that are rotatably disposed opposite to the V-shaped projections 1a are recessed. A V-shaped groove 2a that fits with the V-shaped protrusion 1a, a V-shaped groove 3a, 3a that is recessed in the center of each of the side surfaces B4, B4 of the rectangular tube portion B2, and the V-shaped grooves 3a, 3a. And V-shaped protrusions 4a and 4a having sharp V-shapes that fit into the V-shaped grooves 3a and 3a projecting on the outer peripheral surfaces of the rollers 4 and 4, respectively, rotatably disposed.
[0016]
Each V-shaped projection 1a is continuously provided in the vertical direction on the left and right side edges of the guide plate 1 formed in the shape of a thin front quadrilateral plate, and the guide plate 1 is protruded from each side surface B3 of the rectangular tube portion B2. Thus, the surfaces of the guide plates 1 and 1 are arranged in the same plane as the side surfaces B3 and B3 so that they cannot be moved at least in the front-rear direction and the left-right direction, and are detachably attached. The V-shaped protrusions 1a are inclined so as to gradually protrude in the left-right direction toward the downstream side in the web feed-out direction.
In the case of the present embodiment, the upper locking portion 1b and the lower locking portion 1c which protrude in the vertical direction from the upper and lower ends of the guide plate 1 on the back surface of each guide plate 1 but do not protrude from the left and right ends are narrow. A mounting hole B6 is provided in the side surface B3 of the rectangular tube part B2 so that both the locking parts 1b and 1c can freely enter and exit. The vertical dimension of the mounting hole B6 is larger than the vertical dimension of the guide plate 1. Is smaller than the vertical dimension from the upper latching portion 1b to the lower latching portion 1c, and the left and right width dimensions are the same as those of the latching portions 1b and 1c, so that the upper latching portion 1b extends from the mounting hole B6. After the lower locking portion 1c is inserted into the rectangular tube portion B2 from the mounting hole B6 while being inserted into the rectangular tube portion B2 and moving the entire guide plate 1 upward, the lower surface of the guide plate 1 is below the mounting hole B6. Both locking portions 1b and 1c and the guide are moved downward until they contact the inner side surface. The side surfaces B3 are sandwiched in the front-rear direction at both the left and right ends of 1 and supported so as not to move, and the left and right side surfaces of both locking portions 1b, 1c abut against the left and right inner surfaces of the mounting hole B6, respectively, and cannot move in the left-right direction I support it.
Further, from the state in which the guide plate 1 is attached, the guide plate 1 is moved upward until the upper surface of the guide plate 1 comes into contact with the upper inner surface of the attachment hole B6, as shown by the two-dot chain line in FIG. After removing the locking portion 1c from the mounting hole B6 to the outside of the rectangular tube portion B2, the entire guide plate 1 is moved downward to remove the upper locking portion 1b from the mounting hole B6 to the outside of the rectangular tube portion B2.
[0017]
Each roller 2 in which the V-shaped groove 2a is recessed is rotatable at the tip of a lever 2b supported so as to be swingable in the direction approaching or leaving the side surface B4 of the rectangular tube portion B2, that is, in the left-right direction. Moreover, it is detachably attached with, for example, a set screw.
[0018]
Each V-shaped groove 3a is continuously recessed in the vertical direction at the left and right center of the flat plate 3, and the flat plate 3 cannot move at least in the horizontal direction and the front and rear direction with respect to each side surface B4 of the rectangular tube portion B2. By detachably attaching, the surfaces of these flat plates 3 and 3 are arranged inside the V-shaped projections 1a.
In the case of the present embodiment, a narrow upper locking portion 3b and a lower locking portion 3c are provided on the back surface of each flat plate 3 so as to protrude from the upper and lower ends of the flat plate 3 in the vertical direction but not from the left and right ends. An attachment hole B7 through which both the locking portions 3b and 3c can freely enter and exit is opened in each side face B4 of the rectangular tube portion B2, and the vertical dimension of the attachment hole B7 is larger than the vertical dimension of the flat plate 3. It is smaller than the vertical dimension from the locking part 3b to the lower locking part 3c, and has the same width as the locking parts 3b and 3c, so that the upper locking part 3b extends from the mounting hole B7 to the rectangular tube part B2. After the lower locking portion 3c is inserted into the square tube portion B2 from the mounting hole B7 while the entire flat plate 3 is moved upward while being inserted into the flat plate 3, the lower surface of the flat plate 3 is in contact with the lower inner surface of the mounting hole B7. By moving downward, the side surfaces B4 at both the left and right ends of the locking portions 3b, 3c and the flat plate 3 are provided. While sandwiched by immovably supported Ryokakaritome portion 3b, both side surfaces of 3c is immovably supported respectively in contact with the inner surface of the mounting hole B7.
Also, from such a state in which the flat plate 3 is attached, the flat plate 3 is moved up until the upper surface thereof comes into contact with the upper inner surface of the attachment hole B7 in reverse to the above-described procedure, and the lower locking portion 3c is moved from the attachment hole B7 to the square tube. After removing the portion B2 outside, the entire flat plate 3 is moved downward to remove the upper locking portion 3b from the mounting hole B7 to the outside of the rectangular tube portion B2.
[0019]
Each roller 4 provided with a V-shaped protrusion 4a is disposed downstream of the fitting position of the V-shaped protrusion 1a and V-shaped groove 2a in the web A feeding direction, and approaches each side surface B4 of the rectangular tube portion B2. Alternatively, it is pivotally attached to the tip of the lever 4b supported so as to be swingable in a direction away from it, and is detachably attached by, for example, a set screw.
[0020]
The lever 2b of each roller 2 and the lever 4b of each roller 4 press each V-shaped groove 2a toward each V-shaped protrusion 1a, and each V-shaped protrusion 4a toward each V-shaped groove 3a. The pressing means 5 that always presses, the adjusting means 6 that adjusts the pressing force of the pressing means 5, the V-shaped grooves 2a are forcibly separated from the V-shaped projections 1a, and the V-shaped grooves 3a Release means 7 for forcibly separating the protrusion 4a is provided.
[0021]
In this embodiment, the pressing means 5 is an elastic member such as a tension coil spring connected to the base ends of the levers 2b and 4b as shown in FIG. 1, and the base ends of the levers 2b and 4b are connected to the rectangular tubes. By pulling in a direction away from each side surface B4 of the part B2, the front end portion to which each roller 2, 4 is attached is pressed in a direction approaching each side surface B4.
[0022]
In this embodiment, the adjusting means 6 comprises an adjusting screw 6a continuously connected to the elastic member of the pressing means 5 as shown in FIG. 1, and a fixing nut 6b in which the adjusting screw 6a is screwed forward and backward. Then, by adjusting and moving the adjusting screw 6a with respect to the fixing nut 6b, the front end portions of the levers 2b and 4b to which the rollers 2 and 4 are attached are moved closer to the side surfaces B4 of the rectangular tube portion B2. Press at the set pressure.
[0023]
In the case of the present embodiment, the releasing means 7 is an eccentric cam 7 that is rotatably supported and abuts against the base end side of each lever 2b, 4b as shown in FIG.bAnd this eccentric cam 7bOperation handle 7 connected toaThe operation handle 7aIs rotated clockwise, for example, by rotating the eccentric cam 7bBy shortening the interval from the rotation center to the lever contact position, the base end side of each lever 2b, 4b is separated from each side surface B4 of the rectangular tube portion B2, and each roller 2, 4 is attached. The distal ends of the levers 2b and 4b are brought close to the side surfaces B4, and the operation handle 7 is rotated counterclockwise, for example, in the opposite direction.aRotate the eccentric cam 7bBy extending the distance from the rotation center to the lever contact position, the base ends of the levers 2b and 4b are moved closer to the side surfaces B4 of the rectangular tube portion B2, and the rollers 2 and 4 are attached. The front ends of the levers 2b and 4b are separated from the side surfaces B4.
[0024]
The guide plate 1 provided with the V-shaped protrusions 1a and 1a and the roller 4 provided with the V-shaped protrusion 4a have different V-shaped protrusions 1a and 4a having different protruding tip angles within a range of 30 to 60 degrees, for example. A plurality of types of guide plates 1 and rollers 4 with protrusions are prepared, and the roller 2 with the V-shaped grooves 2a and the flat plate 3 with the V-shaped grooves 3a are in a groove angle range of, for example, 45 to 90 degrees. A plurality of types of rollers 2 and flat plates 3 in which different V-shaped grooves 2a and 3a are recessed are prepared, and V-shaped projections 1a, 4a and V-shaped at an optimum angle corresponding to the material and thickness of the web A are prepared. The grooves 2a and 3a are selected and used.
[0025]
In the case of the present embodiment, the folding is performed as shown in FIGS.Thin plateA shake prevention holder J that moves toward the preceding bag body A3 after being filled with the encapsulated article is provided immediately before G and G protrude, and the shake prevention holder J holds the bag body A3 so that it cannot be laterally shaken. Fold byThin plateG and G are precisely aligned with the creases C2 and C2 formed at the center of both side surfaces A1 and A1 of the web A, and further, for example, as described in JP-A-2-152630 A curved body K that projects and moves toward the lateral seal portion A4 that hangs down from the bottom surface of the preceding bag body A3 after being filled is provided in parallel with the lateral seal device H. The seal portion A4 is bonded to the bottom surface of the bag body A3 using the remaining heat.
[0026]
Next, the operation of the creasing device of such a bag making filling and packaging machine will be described.
First, in order to correspond to the material and thickness dimension of the web A to be used, a guide plate 1 having V-shaped projections 1a and 1a projecting at an optimum angle, a roller 4 having V-shaped projections 4a projecting, and V The roller 2 with the concave groove 2a and the flat plate 3 with the concave V-shaped groove 3a are selected and attached, and the adjusting screws 6a of the adjusting means 6 are adjusted and moved to the V-shaped protrusion 1a. The groove 2a is pressed with an optimal pressure, and the V-shaped protrusions 4a and 4a are pressed with an optimal pressure toward the V-shaped grooves 3a and 3a.
[0027]
In this state, as shown in FIG. 1, the operating handle 7b of the releasing means 7 is rotated in the counterclockwise direction, for example, and the rollers 2 ... 4, 4 are separated from the side surfaces B4, B4 of the rectangular tube portion B2. Start intermittent operation.
Thus, the web A is fed out while being wound around the cylindrical portion B1 of the bag-making cylinder B, and both side edges thereof are vertically sealed by the vertical sealing device E to be formed into a cylindrical shape.
[0028]
After this cylindrical web A is in a state of stably passing through the fold folding means C, the operation of the feeding means D is temporarily stopped and the operation handle 7b of the releasing means 7 is rotated, for example, in the clockwise direction. .., 4 and 4 are brought close to the side surfaces B4 and B4 of the rectangular tube portion B2 to sandwich the web A, and the intermittent operation of the feeding means D is started again.
[0029]
Thus, as shown in FIG. 2, the cylindrical web A fed out from the cylindrical portion B1 along the rectangular tube portion B2 has an acute V-shaped protrusion 1a that protrudes from the ridge corner edge B5 of the rectangular tube portion B2. The four corners that pass between the V-shaped grooves 2a of the roller 2 that fits with the V-shaped projections 1a and that face the ridge corner edges B5 of the web A are sandwiched with the optimum pressure, and at the same time A crease C1... That is bent to an optimum angle and protrudes outward is added.
[0030]
The folds C1 are fed out along the V-shaped projections 1a while being engaged with the V-shaped projections 1a projecting from the ridge corner edges B5 of the rectangular tube portion B2, and thereby the web A is fed out. It is positioned in the direction orthogonal to.
[0031]
In this state, between the V-shaped grooves 3a and 3a that are respectively recessed in the center of the side surfaces B4 and B4 of the rectangular tube portion B2, and the acute-angled V-shaped protrusions 4a and 4a that fit into the V-shaped grooves 3a and 3a, respectively. , A pair of opposing side surfaces A1 and A1 of the web A is sandwiched with an optimum pressure, and at the same time, folded inward at an optimum angle, and a crease C2 projecting inwardly. , C2.
[0032]
In addition, when the web A to be used is changed, the guide plate 1 and the V-shaped protrusion 4a provided with the V-shaped protrusions 1a and 1a having the optimum angles are protruded so as to correspond to the material and the thickness dimension. The roller 4 provided, the roller 2 provided with the V-shaped groove 2a and the flat plate 3 provided with the V-shaped groove 3a are selected and attached again, and the adjusting screw 6a of the adjusting means 6 is adjusted and moved again. The V-shaped grooves 2a are pressed toward the V-shaped protrusions 1a with an optimal pressure, and the V-shaped protrusions 4a and 4a are pressed toward the V-shaped grooves 3a and 3a with an optimal pressure.
Therefore, the creases C1,..., C2, C2 can be accurately and reliably attached regardless of changes in conditions such as the material and thickness of the web A to be used.
[0033]
In the embodiment shown above, a gusset square bottom type packaging bag in which a pair of opposite side surfaces A2 and A2 of the cylindrical web A are folded inward by the protrusions of the folded pieces F and F and the folded thin plates G and G is provided. However, the present invention is not limited to this, and by removing the folding pieces F and F and the folding thin plates G and G from the previous embodiment, a vertical pillow packaging bag that is not a gusset square bottom type may be produced.
Further, the pressing means 5, the adjusting means 6 and the releasing means 7 are not limited to those described above, and may have other shapes as long as they have similar functions.
[0034]
【The invention's effect】
As described above, the invention according to claim 1 of the present invention corresponds to the material and thickness dimension of the web.FirstBy adjusting the adjusting means, the pressing force of the V-shaped groove toward the V-shaped projection is adjusted, and in this state, the cylindrical web wound in a rectangular tube shape along the rectangular tube portion of the bag-making cylinder is A sharp V-shaped protrusion that protrudes from the ridge edge of the rectangular tube portion, and the V-shaped protrusionFitBy passing between the V-shaped groove,Ridge of square tubeOpposite the corner edgeWebportionSandwiched betweenBend outward at a sharp angleOn the webfoldTheBecause the web is attached, the web material and thickness dimensions are not affectedofExactly where you need itandMake a creaseCan. Therefore, when the web is sandwiched between the perpendicular ridge angle of the rectangular tube and the perpendicular groove of the roller,AttachCompared to the conventional one, the appearance of the bag body is improved and the product value can be improved, and the cost can be reduced compared to the one that needs to replace the entire bag-making cylinder with the square tube part continuously provided, Replacement work is also easy. In addition, the structure of the fold folding means can be simplified and the cost can be reduced compared to the conventional one in which the web is sandwiched between the folding guide piece and the pair of rollers and the bag is folded. The appearance of the body can be improved and the product value can be improved, and the crease can be accurately matched with the right-angled ridge angle of the rectangular tube portion.
[0035]
In addition to the effect of the invention of claim 1, the invention of claim 2Square tubeOpposite to the edge of the ridgeWeb partFold outward and foldWhile attaching, Corresponding to the material and thickness of the webSecondBy adjusting the adjustment means,Square tubeThe pressing force of the V-shaped protrusion toward the V-shaped groove is adjusted, and in this state, the web wound in a rectangular tube shape along the rectangular tube portion isRight and left of the square tubeV-shaped grooves recessed in the center of each side surface, and these V-shaped groovesInRespectivelyFitBy passing between sharp V-shaped projections, the center of both sides of the webSandwiched betweenFold inward at a sharp angle and foldI tried to attachTherefore, the crease is securely attached regardless of changes in conditions such as the material and thickness of the web.CanGusset-type packaging bags with excellent appearance can be produced.
In the invention of claim 2, after a crease is first made in the web portion facing the ridge corner edge of the square tube portion, the fold is engaged with the V-shaped projection of the square tube portion and positioned. Since the center of the left and right side surfaces of the web is folded inwardly, the folds can be stably attached without causing misalignment such as meandering.
[0036]
The invention of claim 3 corresponds to the material and thickness of the web in addition to the effect of the invention of claim 1 or 2.VariousAngular V-shaped protrusions and V-shaped groovesBy preparing a guide plate, plate member and roller havingBetween these V-shaped projections and V-shaped groovesThe crease can be securely and stably attached to the web part regardless of its material and thickness,Even if the V-shaped protrusion rubs due to sliding contact with the web during long-term use, it can be easily replaced, so it can be attached stably over a long period of time with simple adjustment of the fold.Can.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a longitudinal front view of a crease device of a bag making filling and packaging machine showing an embodiment of the present invention when a web is fed.
FIG. 2 is an enlarged cross-sectional plan view of the same.
FIG. 3 is a partially cutaway view of the main part in the longitudinal side view.
FIG. 4 is a partial longitudinal sectional front view showing the time when the web is laterally sealed.
FIG. 5 is a perspective view of a completed packaging bag.
[Explanation of symbols]
A web A2 bag
B Bag making cylinder B2 Square tube
B4 Side B5 Edge edge
C Folding means C1 Crease
1a V-shaped projection 2 Roller
2a V-shaped groove 3a V-shaped groove
4 Roller 4a V-shaped projection
5 Pressing means 6 Adjusting means

Claims (3)

Wherein the web bag forming the cylindrical body (A) is wrapped around the bag accommodating cylinder while feeding along the (B) (B) is formed into a tubular shape, folds folding means creasing device (C) a web ( is drooped formed in the at Rukoto with four folds to a) the (C1) in the longitudinal direction of its web (a) the square tube-shaped web (a), the square tube-shaped web to the droop (a) A crease of a bag making and filling packaging machine that forms a rectangular tubular bag (A2) by laterally sealing in the width direction and fills the packaged article through the bag forming cylinder (B) in the bag (A2). In the attaching device,
The folds folding means (C) is
A rectangular tube-shaped square tube portion (B2) formed on the bag-making tube (B) and having front and rear surfaces (B3) and left and right side surfaces (B4) ;
Projecting in parallel with the front and rear surfaces (B3) of the rectangular tube portion (B2) from the respective ridge corner edges (B5) of the rectangular tube portion (B2) to the sides of the bag-making cylinder (B) and the ridge angle line (B5) a V-shaped projections of sharp V-shape (1a) extending along the)
And the angle the respective V-shaped projections on the outer surface of cylindrical portion (B2) (1a) and rotatable rollers disposed opposite each (2),
A V-shaped groove (2a) recessed in the outer peripheral surface of each of the rollers (2) and fitted with the V-shaped protrusion (1a) ;
With
The creasing device is
Said V-shaped projections and the first pressing means for pressing the corresponding V-shaped groove (2a) via a roller (2) toward (1a) (5),
Second adjusting means (6) for adjusting the pressing force of the first pressing means (5) ;
A crease device for a bag-filling-packaging machine , further comprising: The folds folding means (C) is
V-shaped grooves (3a) respectively recessed at the center of the left and right side surfaces (B4) of the rectangular tube portion (B2) below the roller (2) ;
Wherein each V-groove (3a) and opposite arranged a rotatable roller (4),
A sharp V-shaped protrusion (4a) projecting on the outer peripheral surface of each roller (4) and fitted into the corresponding V-shaped groove (3a) ;
Further comprising
The creasing device is
Wherein a V-groove second pressing means for pressing the V-shaped projections corresponding via rollers (4) (4a) toward the (3a) (5),
Second adjusting means (6) for adjusting the pressing force of the second pressing means (5) ;
The crease forming apparatus for a bag making filling and packaging machine according to claim 1 , further comprising: The fold folding means (C)
A guide plate (1) that is detachably attached to the front and rear surfaces (B3) of the square tube portion (B2), and whose side edges are formed as the V-shaped protrusions (1a);
A plate member (3) detachably attached to the left and right side surfaces (B4) of the rectangular tube portion (B2) and having the V-shaped groove (3a);
Further comprising
The first pressing means (5) includes a swingable lever member (2b) that removably supports the rollers (2).
The product according to claim 1 or 2, wherein the second pressing means (5) includes a swingable lever member (4b) that removably supports the rollers (4) . Folding device for bag filling and packaging machine.

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