JP2011207043A - Bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce adjustment of skill for folding in a folding device of a bag making machine.SOLUTION: The folding device of the bag making machine includes a feed-in roller part 30 nipping a wrapping material 60 across a width direction on a rear surface side and feeding in X direction, and a 90-degree folding part 36 arranged in a downstream side of the feed-in roller part 30. The 90-degree folding part 36 includes offset rollers 38 and 39 offsetting the wrapping material 60 in a vertical direction offset amount of the same dimension amount with a folding amount C in parallel with -Y direction, and a folding roller 40 folding a sub part 70 which is a part of the wrapping material 60 at 90 degrees in a position offset to -Z direction in a width direction offset amount of the same dimension amount with the folding amount C from a width direction end 71 of the sub part 70. A plane surface 72 forming a triangle from a nipping position of the feed-in roller part 30 is formed, and a fold width part 80 of the sub part 70 is folded.

Description

  The present invention relates to a bag making machine, and more particularly, to a bag making machine including a folding device that bends an end portion in the width direction of a sheet-like packaging material with a predetermined folding amount.

  To create a bag-like container etc. from a sheet-like packaging material, bend the sheet-like packaging material in an appropriate order, join the necessary parts by adhesion etc., and attach an appropriate container mouth etc. in some cases Is done. A machine that manufactures a bag-like container by performing these steps in order is called a bag-making machine or the like.

  For example, in Patent Document 1, as a method of manufacturing a pouch container with a spout, when a packaging material is delivered from a packaging material delivery unit, a plurality of crease lines are formed in the crease line formation unit, and a crease line is formed in the fold unit. A portion corresponding to the body portion of the pouch, a portion corresponding to the top gusset portion, and a portion corresponding to the bottom gusset portion are formed.

In Patent Document 2, as a continuous bag-making method, a film unwound from one original fabric roll is sandwiched between a crease roller and a guide roller, and a plurality of films are parallel to the film flow direction. It is stated that after the crease line is applied, it is sent to the folding device. And in the folding device, it has a front folding plate, a back folding plate, the same folding plate, and a folding member such as a front folding roller, a back folding roller, and the folding roller, and the film passes through these folding members. It is stated that folding, reverse folding, and folding are performed to fold the film. In this way, the film is folded into a substantially bag shape, and it is stated that Σ-shaped folded portions are formed on both sides of the film in order to allow the packaging bag to swell when it becomes a packaging bag.

International Publication No. 2008/096392 Pamphlet Japanese Patent Laid-Open No. 11-268152

  As described in the above-mentioned patent document, a folding device for folding a sheet-like packaging material is used in a conventional bag making machine. To fold the end of a sheet-shaped packaging material with a predetermined folding width, use a suitably long folding span along the direction in which the packaging material is delivered, and gradually twist the packaging material in that span. In this way, it is bent at 90 degrees or 180 degrees.

  In this way, since it is bent so as to be gradually twisted between long spans, it is difficult to make uniform the tension or tension applied to the wrapping material in the bent portion, and it tends to meander due to the long span. . For these reasons, the bending guide is provided at an appropriate position between the long spans, and the adjustment is performed so that the folding can be performed cleanly. This adjustment often differs depending on the packaging material and the amount of folding, and is a work requiring skill. In addition, because of the long span, the equipment becomes large, especially in the case of a bag having a plurality of bends, the skill adjustment becomes complicated and the equipment becomes larger.

  An object of the present invention is to provide a bag making machine including a folding device that can reduce skilled adjustment. Another object is to provide a bag making machine including a folding device that enables downsizing of the device.

  A bag making machine according to the present invention is a bag making machine including a folding device that bends an end portion in the width direction of a sheet-like packaging material with a predetermined amount of folding, and is perpendicular to the feeding direction of the packaging material And a feeding roller portion that sandwiches the packaging material across the width direction on the front and back sides and feeds it in the feeding direction, and a predetermined feeding on the downstream side of the feeding roller portion along the feeding direction of the packaging material An offset roller that is arranged at a side separation distance and offsets the packaging material in parallel with the surface vertical direction offset amount having the same dimensional amount as the folding amount in the direction perpendicular to the surface of the packaging material before folding, and the packaging material at the offset position A folding roller that bends the packaging material 90 degrees at a position offset in the width direction of the packaging material by a width direction offset amount having the same dimensional amount as the amount of bending from the end in the width direction of the The plane to make Form, characterized in that it comprises a 90-degree bent portion for bending the packaging material, the by.

  Further, in the bag making machine according to the present invention, a support that is arranged at a predetermined intermediate separation distance downstream of the 90-degree bent portion along the feeding direction of the packaging material and supports the packaging material in a state of being folded 90 degrees. The roller part is arranged at a predetermined sending-side separation distance downstream of the supporting roller part along the feeding direction of the packaging material, and the vertical offset amount from the offset roller is perpendicular to the surface of the packaging material. Returning, the packaging material delivery direction is on the extension of the feeding direction, and the packaging material is further bent 90 degrees at that position to be bent 180 degrees, thereby forming a plane that forms a triangle from the support position of the support roller part And a 180-degree bent portion that bends the packaging material.

  In the bag making machine according to the present invention, the wrapping material is arranged with a predetermined sending-side separation distance downstream of the 90-degree bent portion along the feeding direction of the wrapping material, and the dimensional amount of the vertical offset amount from the offset roller. By returning to the direction perpendicular to the surface, the delivery direction of the packaging material is set to be an extension of the feeding direction, and the packaging material is further bent 90 degrees at that position to be in a 180-degree folded state, so that It is preferable to provide a 180-degree bent portion that forms a triangular plane and bends the packaging material.

  In the bag making machine according to the present invention, it is preferable that the 90-degree folding rollers of the 90-degree folding section are respectively arranged on the front side and the back side of the folding width portion of the packaging material to sandwich the packaging material.

  In the bag making machine according to the present invention, it is preferable that the feeding side separation distance and the sending side separation distance are dimensional amounts that are 1 to 10 times the folding amount.

  With the above configuration, the bag making machine including the folding device bends in the direction perpendicular to the surface of the packaging material before folding on the downstream side of the feeding roller portion along the feeding direction of the packaging material when folding 90 degrees. The packaging material is offset in parallel by the surface vertical direction offset amount of the same dimensional amount as the amount, and the width direction of the packaging material by the width direction offset amount of the same dimensional amount as the bending amount from the width direction end of the packaging material at the offset position The packaging material is bent at 90 degrees at a position offset to 90 °, thereby forming a plane that forms a triangle from the sandwiching position of the feeding roller portion and folding the packaging material.

  As described above, since the folding is performed on a triangular plane, it is possible to prevent the tension during the bending from becoming non-uniform compared to the case of folding by twisting as in the prior art. Therefore, bending can be performed without requiring complicated adjustments for uniform tension and prevention of meandering. Further, since a long bending span, a guide in the middle of bending, and the like are not required, a small apparatus can be obtained.

  In addition, when the bag making machine is bent 180 degrees, a support roller part is provided to support the packaging material in a state where the packaging material is bent 90 degrees, and the amount of vertical offset from the offset roller is set on the downstream side of the support roller part. Returning to a direction perpendicular to the surface of the packaging material, the delivery direction of the packaging material is set to be an extension of the feeding direction, and the packaging material is further bent 90 degrees at that position to be bent 180 degrees. As a result, a triangular plane is formed from the support position of the support roller portion, and the packaging material is bent.

  As described above, since the further folding from the 90-degree folding is performed on a triangular plane, it is possible to prevent the tension at the time of bending from becoming uneven as compared with the case of bending by twisting as in the prior art. Therefore, bending can be performed without requiring complicated adjustments for uniform tension and prevention of meandering. Further, since a long bending span, a guide in the middle of bending, and the like are not required, a small apparatus can be obtained.

  Also, in the bag making machine, on the downstream side of the 90-degree folded part, the dimension amount of the vertical offset amount from the offset roller is returned to the direction perpendicular to the surface of the packaging material, and the packaging material feeding direction is extended to the feeding direction. At that position, the packaging material is further bent 90 degrees to be in a 180-degree bent state. As a result, the support roller portion can be omitted.

  In this case, in the bag making machine, if the 90-degree folding roller of the 90-degree folding section is arranged on the front side and the back side of the folding width portion of the packaging material and sandwiches the packaging material, the support roller section Even if is omitted, a triangular plane can be satisfactorily formed.

  In the bag making machine, the sending side separation distance and the sending side separation distance are each set to a dimensional amount that is 1 to 10 times the amount of bending, thereby making the device smaller than the conventional technology. Can do.

It is a figure explaining the mode of composition of a bag making machine including a folding device of an embodiment concerning the present invention. In embodiment which concerns on this invention, it is the top view and front view explaining the structure of a bending apparatus. In embodiment which concerns on this invention, it is a perspective view explaining the structure and effect | action of a bending apparatus. In embodiment which concerns on this invention, it is a figure explaining the state before bending of the packaging material used for a bending apparatus. In embodiment which concerns on this invention, it is a figure explaining a mode that the packaging material of FIG. 4 is bent at 90 degree | times using a bending apparatus. It is a figure explaining the mode of 90 degree | times folding of the packaging material in a prior art. In embodiment which concerns on this invention, it is a figure explaining a mode that the packaging material of FIG. 5 is further bent and is 180-folded using a bending apparatus. FIG. 8 is a diagram illustrating another configuration example in relation to FIG. 7.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In the following, as a bag making machine including a folding device, a device for producing a spouted container will be described. However, this is used as a suitable example of a bag making machine and has a configuration other than this. Of course, it doesn't matter.

  In the following, description will be made using an intermediate wrapping material that has already been folded as a wrapping material to be folded, but this is also an example of the description, and bending or the like is performed at all. You may bend the packaging material that is not. Moreover, the case where the semi-finished product packaging material which has a more complicated structure than the state of the intermediate packaging material of description may be folded.

  The shapes, dimensions, materials, and the like described below are illustrative examples and can be appropriately changed in accordance with the specifications of the bag making machine or the like.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a diagram illustrating a configuration of a bag making machine 10 for manufacturing a spouted container. The bag making machine 10 includes a reel unit 12 around which a packaging material that is a sheet of raw material is wound, an accumulator unit 14 that is a buffer mechanism for sending out the packaging material, a folding device 16 that bends the packaging material, A spout attachment unit 18 for supplying and attaching a spout to the folded packaging material, a joining unit 20 for joining the top part and the bottom part of the packaging material with spout, a point joining part 22 for joining other necessary parts, It comprises a cutting unit 24 for separating into a spouted container.

  In the following drawings, the X, Y, and Z directions orthogonal to each other are shown in order to indicate from which direction the illustrated content is viewed. Here, the + X direction is the direction in which the packaging material flows, and the Z direction is the vertical direction of the bag making machine 10, that is, the direction perpendicular to the installation floor surface. The installation floor is a plane parallel to the XY plane. The + Y direction is the direction from the near side to the far side of the paper surface in the case of FIG.

  The folding device 16 of the bag making machine 10 has a function of performing a number of folding processes. Hereinafter, as a basic function of the folding function, a part having a 180-degree folding function shown as A in FIG. 1 is extracted. I will explain. 2A and 2B are diagrams for explaining the configuration of the three stations 26, 27, and 28 used for the 180-degree bending of the bending apparatus 16, wherein FIG. 2A is a plan view and FIG. 2B is a front view. Here, although it is not a component of the bending apparatus 16, the packaging material 60 used as the object of bending is shown.

  The packaging material 60 shown here is an intermediate packaging material which has the folding part 64 which forms the swell margin part when it becomes a bag shape already, as FIG.2 (b) shows. . The wrapping material 60 has a main part 62 and a sub part 70 extending on both sides of the folding part 64. The three stations 26, 27, and 28 in FIG. 2 have a function of bending the end portion of the sub-portion 70 by 180 degrees with a bending amount C.

  In the case of FIG. 2, this bending is performed on the back side of the paper surface, so the state is shown by a broken line. Therefore, FIG. 3 shows a perspective view of the state seen from the back side of the page. The configuration of the three stations 26, 27, and 28 will be described with reference to FIGS.

  The station 26 is arranged on the most upstream side in which the packaging material 60 flows among the three stations 26, 27, and 28, and has a configuration in which a plurality of rollers are arranged in a casing portion extending in the Z direction. The axial directions of the plurality of rollers are all parallel to the Z direction.

  The feeding roller portion 30 of the station 26 is arranged in parallel to the Z direction, which is a direction perpendicular to the + X direction, which is the feeding direction of the packaging material 60, and sandwiches the packaging material 60 in the width direction on the front and back sides. Has the function of feeding in the loading direction. Here, the width direction of the packaging material 60 is a direction parallel to the Z direction. As shown in FIG. 3, the feeding roller unit 30 includes a pair of sandwiching rollers 32 and 34 that sandwich the packaging material 60 on the front and back sides in the width direction.

  The station 27 is disposed on the downstream side of the station 26, and has a configuration in which a plurality of rollers are disposed in a casing portion that also extends in the Z direction in the Z direction. The axial directions of the plurality of rollers include those parallel to the Z direction and those parallel to the Y direction. As shown in FIG. 2, the station 27 is a composite roller mechanism including a 90-degree bent portion 36 and a support roller portion 42.

  The 90-degree bending portion 36 includes offset rollers 38 and 39 parallel to the Z direction and a bending roller 40 parallel to the Y direction. As shown in FIG. 3, the bending roller 40 is disposed between the offset roller 38 and the offset roller 39 on the side where the auxiliary portion 70 of the packaging material 60 is present. The offset rollers 38 and 39 are separated due to the folding roller 40, but they are arranged coaxially. The offset roller 39 can be omitted when the height of the main portion 62 in the Z direction is the same as the height of the sub portion 70.

  The offset rollers 38 and 39 are disposed at a predetermined feeding side separation distance L1 on the downstream side of the feeding roller unit 30 along the + X direction that is the feeding direction of the packaging material 60. Then, in the −Y direction, which is the direction perpendicular to the + X direction, which is the feeding direction of the packaging material 60 before being folded, the arrangement is performed with the vertical offset amount C having the same dimensional amount as the bending amount C. As a result, the packaging material 60 can be offset in parallel in the −Y direction by C from the position sandwiched by the feeding roller unit 30.

  The folding roller 40 is measured from the width direction end 71 of the sub-part 70 of the packaging material 60 at the position where the position of the packaging material 60 in the Y direction is offset with respect to the feeding roller unit 30 as described above. It is arranged at the position of the width direction offset amount C having the same dimensional amount as the bending amount C in the −Z direction. That is, the width direction end 71 of the sub part 70 is moved by C in the −Z direction by the bending roller 40.

  That is, by setting the width direction offset amount C of the folding roller 40, the width width end 71 that is the top of the sub width 70 that is parallel to the XZ plane is only C in the −Z direction. While moving, the surface becomes parallel to the XY plane including the axial direction of the folding roller 40. As a result, the bent width portion 80, which is the portion of the sub portion 70 with the bending amount C, is bent from the sandwiching position of the feeding roller portion 30 to form a triangular plane 72.

The plane 72 forming this triangle is {(width direction offset amount C) ² + (feed side separation distance L1) ² } ^1/2 = {(vertical direction offset amount C) ² + (feed side separation distance L1). ² } Since there is a ^1/2 relationship, all the portions in the width direction of the bent width portion 80 have the same length. For this reason, all the portions in the width direction of the bent width portion 80 have the same tension. In this way, since the plane 72 is a plane that is not twisted or the like, a large change in tension or meandering at the bent portion is suppressed.

  On the downstream side of the folding roller 40, the sub-part 70 has a longitudinal sub-part 78 that is a part parallel to the XZ plane as in the original state, and a bending amount C that is bent by 90 degrees and parallel to the XY plane. It is composed of a width plane 74 and sent out. In this way, the bent width portion 80 of the sub-part 70 is bent 90 degrees.

  Next, the support roller unit 42 is configured to include Z rollers 44 and 45 parallel to the Z direction and a Y roller 46 parallel to the Y direction. In this configuration, the Y roller 46 is disposed between the Z roller 44 and the Z roller 45 as in the case of the 90-degree bent portion 36, and the Z rollers 44 and 45 are separated because of the Y roller 46. However, they are arranged coaxially. The difference is that the bending roller 40 is disposed in contact with the + Z side surface of the plane 74, whereas the Y roller 46 is disposed in contact with the −Z side surface of the plane 74.

  The support roller portion 42 is arranged at a predetermined intermediate separation distance L2 on the downstream side of the 90-degree bent portion 36 along the feeding direction of the packaging material 60. And since it is the same structure as the 90 degree | times bending part 36, it has the function to support the plane 74 of the width of the bending amount C of the sub part 70 in the state parallel to XY plane, and to send it out downstream.

  The station 28 is disposed on the downstream side of the station 27, and has a configuration in which a plurality of rollers are disposed in a casing portion that also extends in the Z direction in the Z direction. The axial directions of the plurality of rollers are all parallel to the Z direction. The station 28 includes a 180-degree bent portion 48.

  The 180-degree bent portion 48 is arranged at a predetermined sending-side separation distance L3 on the downstream side of the support roller portion 42 along the + X direction that is the feeding direction of the packaging material 60. Then, the dimensional amount of the vertical offset amount C offset by the offset rollers 38 and 39 and the Z rollers 44 and 45 is returned to the + Y direction which is a direction perpendicular to the packaging material feeding direction. It is arranged at a position where the sending direction is an extension of the sending direction. That is, the feeding roller part 30 and the 180-degree bent part 48 are arranged at the same Y direction position with the direction in which the packaging material 60 flows as a reference plane.

  The 180-degree bent portion 48 is arranged in parallel to the Z direction perpendicular to the + X direction, which is the feeding direction and the feeding direction of the packaging material 60, similarly to the feeding roller unit 30, and the packaging material 60 is arranged in the width direction. It has a function of being sandwiched between the front and back sides and sending out in the sending direction. As shown in FIG. 3, the 180-degree bent portion 48 includes a pair of sandwiching rollers 50 and 52 that sandwich the packaging material 60 on the front and back sides in the width direction.

  Therefore, the plane 74 of the sub-part 70 that was parallel to the XY plane up to the support roller part 42 is bent in a direction parallel to the XZ plane by the pair of sandwiching rollers 50 and 52. By this bending, the bent width portion 80 of the sub-part 70 is bent 180 degrees so that it is folded by the long-side sub-part 78 of the sub-part 70.

  At this time, the position of the support roller portion 42 in the Z direction of the Y roller 46 is in the + Z direction by the folding amount C from the position of the width direction end 71 of the bent width portion 80 bent 180 degrees. In other words, the width direction end 71 of the plane 74 parallel to the XY plane supported by the support roller portion 42 moves in the −Z direction by the bending amount C.

  As a result, the bent width portion 80 of the sub portion 70 is bent by forming a triangular plane 76 from the position supported by the support roller portion 42. Since the flat surface 76 is a flat surface that is not twisted or the like, like the triangular flat surface 72, it is possible to suppress a large change in tension or meandering at the bent portion. In addition, it is preferable that the plane 76 forming the triangle has the same size as the plane 72 forming the triangle such that the sending side separation distance L1 = the transmission side separation distance L3.

  On the downstream side of the 180-degree bent portion 48, the sub-portion 70 is composed of a longitudinal sub-portion 78 and a bending width portion 80 having a width of a bending amount C that is bent 180 degrees so as to be folded on this and parallel to the XY plane. Composed and sent out. In this way, the bending width portion 80 of the sub portion 70 is bent by 180 degrees.

  The bending of the above configuration will be described with reference to FIGS. FIG. 4 is a front view and a plan view showing a state of the sub part 70 before bending. Here, a fold line 90 is shown. The position of the fold line 90 corresponds to a position parallel to the width direction end 71 of the sub-part 70 and entering from the inside in the width direction by a fold amount C. The portion between the width direction end 71 and the fold line 90 is a fold width portion 80 in the sub portion 70, but since the fold is not yet performed here, the sub portion 70 has a linear shape in the plan view. It is shown.

  FIG. 5 is a front view and a plan view showing a state in which the sub-part 70 is bent 90 degrees by the 90-degree bent part 36. Here, a triangular plane 72 is formed from the width direction end 71 of the sub-part 70 toward the position lowered in the −Z direction by the bending amount C by the functions of the offset rollers 38 and 39 and the bending roller 40. As shown in FIG. 5, the position of the bending roller 40 that contacts the bending width portion 80 of the sub-part 70 is a position that is offset from the width direction end 71 of the sub-part 70 by the bending amount C in the −Z direction. Further, the position where the offset rollers 38 and 39 abut on the sub-portion 70 is a position shifted in the −Y direction by the bending amount C from the sandwiching position of the pair of sandwiching rollers 32 and 34 of the feeding roller unit 30.

  In this way, by setting the width direction offset amount in the −Z direction of the contact position of the bending roller 40 and the vertical direction offset amount in the −Y direction of the offset rollers 38 and 39 as the bending amount C, there is no twist. The triangular plane 72 can be formed stably. This setting can be easily performed by non-experts if the amount of bending C is determined, and therefore, it is possible to perform settings for suppressing the occurrence of large changes in tension and meandering in the bent portion even if not skilled persons. Can do.

  The feeding side separation distance L1 that is the length in the X direction forming the triangular plane 72 can be arbitrarily set within a range in which the rollers of the feeding roller portion 30 and the 90-degree bent portion 36 can be disposed. For example, it may be arbitrarily set within a range of 1 to 10 times the bending amount C. Of course, it is not limited to 10 times or less, and may be set to 10 times or more, for example. More preferably, it is 2 to 5 times the bending amount C.

  FIG. 6 is a front view showing a state in which bending is performed according to the prior art, and a diagram showing a change in the cross-sectional shape of the sub part 70 at each position along the direction in which the sub part 70 flows. As described above, in the bag manufacturing machine of the prior art, in order to bend the folding width portion 80 of the sub-part 70 that is a sheet-like packaging material with the predetermined folding amount C, the sub-part 70 is sent in the direction in which it is delivered. Thus, an appropriately long span L for bending is used, and the bent width portion 80 of the sub-part 70 is gradually twisted in the span L so as to be bent at 90 degrees or 180 degrees. FIG. 6 shows a state in which the bent width portion 80 is bent 90 degrees while being twisted.

  In this way, since it is bent so as to be gradually twisted without taking the vertical offset amount between the long spans L, it is difficult to make the tension applied to the bent width portion 80, that is, the tension uniform. On the other hand, in the structure of FIG. 5, since the shape is defined by the folding roller 40, the offset rollers 38 and 39, and the sandwiching rollers 32 and 34, the folding plane is a triangular plane 72 that does not twist. It has become.

  FIG. 7 is a front view and a plan view showing a state in which the bending width portion 80 of the sub-part 70 bent 90 degrees is further bent 90 degrees by the 180-degree bending section 48 and is bent 180 degrees in total. Here, a triangular plane 72 is formed and bent as described above, and a plane 74 having a width of a bending amount C parallel to the XY plane is sent out as a bent width portion 80, and this is supported by the support roller portion 42. Then, it is further bent 90 degrees by the 180-degree bending portion 48, and the total 180-degree bending is performed.

  This bending can be performed as if 90-degree bending is performed in the reverse direction. That is, the Z rollers 44 and 45 of the support roller portion 42 correspond to the offset rollers 38 and 39 of the 90-degree bending portion 36, and the Y roller 46 corresponds to the bending roller 40. The pair of sandwiching rollers 50 and 52 of the 180-degree bending roller correspond to the pair of sandwiching rollers 32 and 34 of the feeding roller unit 30.

  Then, as shown in FIG. 7, the plane 74 with the width of the bending amount C is a triangular shape from the position of the height in the Z direction of the plane 74 toward the position lowered in the −Z direction by the bending amount C. A plane 76 is formed.

  As shown in FIG. 7, the position where the Y roller 46 abuts on the back side of the flat surface 74 is substantially the same as the position where the bending roller 40 abuts on the front side of the flat surface 74, except for the thickness of the sub part 70. The position of the width direction end 71 of the bent width portion 80 bent 180 degrees of the sub part 70 is a position offset in the −Z direction by the bending amount C from the contact position of the Y roller 46. In other words, the position of the Y roller 46 in the Z direction is a position that is reversely offset in the + Z direction by the amount of bending C from the position of the width direction end 71 of the bent width portion 80 of the sub part 70 that is bent 180 degrees. .

  Further, the Z rollers 44 and 45 of the support roller portion 42 are located at the position where the pair of sandwiching rollers 50 and 52 of the 180-degree bent portion 48 bends and sandwiches the bent width portion 80 of the sub-portion 70 by 180 degrees. The position is reversely offset in the + Y direction by the bending amount C from the position in contact with the longitudinal sub-part 78. That is, the position in the Y direction where the pair of sandwiching rollers 50 and 52 of the 180-degree bent portion 48 bends and sandwiches the folded width portion 80 of the sub-part 70 by 180 degrees is the pair of sandwiching rollers 32 and 32 of the feeding roller unit 30. The position 34 is returned to the same position as the position in the Y direction.

  As described above, the + Z direction width direction offset amount of the contact position of the support roller portion 42 with the Y roller 46 and the + Y direction vertical offset amount of the pair of sandwiching rollers 50 and 52 of the 180-degree bent portion 48 are both. By setting the bending amount to C, a triangular plane 76 without twisting can be stably formed. Since this setting can be easily performed by non-experts if the amount of bending C is determined, it is possible for the non-experts to perform settings for suppressing large changes in tension and meandering in the bent portion. .

  Here again, the sending-side separation distance L3, which is the length in the X direction that forms the triangular plane 76, is the same as the feeding-side separation distance L1, and the rollers of the support roller portion 42 and the 180-degree bent portion 48 are the same. It can be set arbitrarily within the range that can be arranged. For example, it may be arbitrarily set within a range of 1 to 10 times the bending amount C. It is not limited to 10 times or less, and preferably 2 times or more and 5 times or less of the bending amount C is the same as in the case of the feeding side separation distance L1. As described above, preferably, the sending side separation distance L3 = the sending side separation distance L1.

  In the above description, the 90-degree bent portion 36 and the support roller portion 42 are separated from each other in order to support the flat surface 76. If the length in the X direction between the 90-degree bent portion 36 and the support roller portion 42 is the intermediate separation distance L2, this L2 may be set appropriately. For example, the intermediate separation distance L2 = 0 may be set. FIG. 8 shows an example of such a configuration. In this configuration, the folding roller 40 and the Y roller 46 are respectively arranged with the folding width portion 80 of the sub part 70 on the front side and the back side, and are used as a pair of sandwiching rollers. In this way, by setting the intermediate separation distance L2 = 0, the folding device 16 can be further reduced in size, and thus the bag making machine 10 can be further reduced in size.

  The folding device of the bag making machine of the present invention can be used to create a bag-like container from a sheet-like packaging material.

  10 bag making machine, 12 reel unit, 14 accumulator unit, 16 folding device, 18 spout mounting unit, 20 joining unit, 22 point joining part, 24 cutting unit, 26, 27, 28 station, 30 feeding roller part, 32, 34, 50, 52 Clamping roller, 36 90-degree folded part, 38, 39 Offset roller, 40 folding roller, 42 Support roller part, 44, 45 Z roller, 46 Y roller, 48 180-degree folded part, 60 Packaging material, 62 Main part, 64 folded part, 70 sub part, 71 width direction end, 72,76 (triangular) plane, 74 plane, 78 longitudinal sub part, 80 folded width part, 90 folding line, L1 feeding side separation distance, L2 intermediate separation distance, L3 delivery side separation distance, C plane vertical offset (width direction) Offset amount).

Claims (3)

A bag making machine including a folding device that bends an end portion in the width direction of a sheet-like packaging material with a predetermined folding amount,
A feeding roller portion that is arranged in a direction perpendicular to the feeding direction of the packaging material, and sandwiches the packaging material on the front and back sides in the width direction and feeds it in the feeding direction;
A surface vertical direction that is arranged at a predetermined feeding side separation distance downstream of the feeding roller portion along the feeding direction of the packaging material, and has the same dimensional amount as the folding amount in a direction perpendicular to the surface of the packaging material before folding. An offset roller that offsets the packaging material in parallel with the offset amount, and a wrapping at the offset position at the offset position in the width direction of the packaging material with a width direction offset amount that is the same dimension as the amount of bending from the width direction end of the packaging material A bending roller that bends the material at 90 degrees, and forms a triangular plane from the sandwiching position of the feeding roller section, and bends the packaging material by 90 degrees,
A bag making machine comprising: The bag making machine according to claim 1,
A support roller portion disposed at a predetermined intermediate separation distance downstream of the 90-degree bent portion along the feeding direction of the packaging material, and supporting the packaging material in a state of being bent 90 degrees;
It is arranged at a predetermined delivery side separation distance downstream of the support roller portion along the feeding direction of the packaging material, and the vertical offset amount from the offset roller is returned to the packaging material surface in the vertical direction to The material delivery direction is an extension of the feed direction, and the packaging material is further bent 90 degrees at that position to form a 180-degree folded state, thereby forming a plane that forms a triangle from the support position of the support roller portion. A 180-degree bent part for bending
A bag making machine comprising: The bag making machine according to claim 1,
It is arranged at a predetermined sending-side separation distance downstream of the bent portion of 90 ° along the feeding direction of the packaging material, and returns the vertical offset amount from the offset roller in the direction perpendicular to the surface of the packaging material, The packaging material delivery direction is set to be an extension of the feeding direction, and the packaging material is further bent 90 degrees at that position to be folded 180 degrees, thereby forming a plane that forms a triangle from the support position of the support roller portion. A bag making machine comprising a 180-degree bending portion for bending a material.

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