JP4536213B2 - Centering device for packaging tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centering device for packaging tube.
[0002]
[Prior art]
Conventionally, in a filling machine for manufacturing a packaging container filled with liquid food such as milk and soft drinks, a tube-like packaging material is continuously formed while conveying a web-like packaging material. A packaging container is manufactured by filling liquid food inside.
[0003]
FIG. 2 is a conceptual diagram of a conventional filling machine.
[0004]
In the figure, reference numeral 11 denotes a packaging material. The packaging material 11 is set on a filling machine in a state of a reel 12, and is fed out by a feeding machine (not shown) to be conveyed in a web shape in the filling machine.
[0005]
Subsequently, the web-shaped packaging material 11 is gradually curved while being guided by a forming ring (not shown), is formed into a tube shape, and is sealed in the vertical direction by a vertical sealing device (not shown). And while the tube-shaped packaging material 11 is conveyed below as a packaging material tube, a liquid food is supplied from upper direction through the filling pipe 13, and is filled in a packaging material tube. Next, the packaging container tube is sandwiched from both sides and sealed in the lateral direction at predetermined intervals, whereby the original container 14 having a pillow shape or a bag shape is formed.
[0006]
Subsequently, by separating the original container 14 by cutting the laterally extending seal portion, i.e., the horizontal seal portion S1, and forming each original container 14 into a predetermined shape along a fold formed in advance, The packaging container 15 is completed.
[0007]
However, when the packaging tube is transported, it is difficult to position the packaging tube because the packaging tube has a substantially circular cross section. Accordingly, when the packaging tube receives a force from the forming ring and rotates in the directions of arrows A1 and A2, the seal portion extending in the vertical direction, that is, the overlap portion S2 is displaced from the correct position. Then, when the original container 14 is formed into a predetermined shape and the packaging container 15 is completed with the overlap portion S2 being displaced from the correct position, the position of the fold formed in the packaging material 11 and the actual position of the fold are formed. Does not match, and the appearance of the packaging container 15 is deteriorated.
[0008]
Therefore, a paper guide (not shown) is disposed in the conveyance path of the web-shaped packaging material 11, the paper guide is pressed against the edge of the packaging material 11, and the packaging material 11 is moved in a direction perpendicular to the conveyance direction. Thus, the position of the overlap portion S2 is adjusted.
[0009]
[Problems to be solved by the invention]
However, in the conventional filling machine, since it is necessary to press the paper guide against the edge of the packaging material 11, the edge of the packaging material 11 is damaged.
[0010]
The present invention solves the problems of the conventional filling machine, and provides a packaging tube centering device capable of adjusting the position of the overlap portion without damaging the edge of the packaging material. With the goal.
[0011]
[Means for Solving the Problems]
Therefore, in the packaging tube centering device of the present invention, the packaging tube forming means for bending the web-shaped packaging material to form the packaging tube, and the packaging material tube forming means in the conveying direction of the packaging material. On the upstream side, the guide roller is rotatably disposed, guides the packaging material, a support portion that movably supports one end of the guide roller, and a fulcrum that pivotally supports the other end of the guide roller Part.
[0012]
In another packaging material tube centering device of the present invention, one end of the guide roller is further moved in a direction parallel to the packaging material transport surface when reaching the guide roller.
[0013]
In still another packaging material tube centering device of the present invention, the device further includes a drive unit for moving one end of the guide roller.
[0014]
In still another packaging material tube centering device of the present invention, one end of the guide roller is detachably disposed in the support portion.
[0015]
In yet another packaging material tube centering device of the present invention, based on the detection result by the overlap portion detection processing means for detecting the overlap portion of the packaging material tube, and the overlap portion detection processing means, Centering processing means for moving one end of the guide roller.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a conceptual diagram showing a main part of a filling machine according to a first embodiment of the present invention, FIG. 3 is a front view showing a guide roller support mechanism according to the first embodiment of the present invention, and FIG. FIG. 5 is a plan view showing a guide roller support mechanism in the first embodiment, and FIG. 5 is a side view showing the guide roller support mechanism in the first embodiment of the present invention. For convenience of explanation, the arrow A direction in FIG. 1 is the vertical direction of the guide roller support mechanism.
[0018]
In the figure, 11 is a web-like packaging material, 30 is an upper chamber disposed in the upper part of the filling machine, and the packaging material 11 is set in the filling machine in the state of a reel 12 (see FIG. 2). It is fed out by a feeding machine that is not used, and is conveyed in a web-like shape in the filling machine. In this case, as shown in FIG. 1, the packaging material 11 that is transported upward in the direction of the arrow and is supplied to the upper chamber 30 is sandwiched between the transport rollers 31 and 32 and then transported obliquely upward. And sent to the air knife 33. Subsequently, the packaging material 11 is conveyed obliquely upward in the air knife portion 33, and during that time, bactericides and the like attached to the packaging material 11 are removed by hot air discharged from a nozzle (not shown).
[0019]
The packaging material 11 discharged from the air knife section 33 is sent to the first guide roller 34, guided by the first guide roller 34, conveyed downward, and sent to the second guide roller 35. It is done. After the packaging material 11 is guided by the second guide roller 35, the packaging material 11 is conveyed obliquely upward, sent to the third guide roller 36, and guided by the third guide roller 36. , Conveyed downward, gradually bent while being guided by a forming ring 37 or the like as a packaging tube forming means, formed into a tube, and sealed in a vertical direction by a vertical sealing device (not shown). It becomes the material 11, that is, the packaging tube 41. The second guide roller 35 is configured as a crease roller and forms a crease in the packaging material 11. Then, while the packaging material tube 41 is conveyed downward, the liquid food is supplied from above via a filling pipe (not shown) and filled in the packaging material tube 41. The first to third guide rollers 34 to 36 guide the packaging material 11 upstream of the forming ring 37 in the conveying direction of the packaging material 11.
[0020]
Thereafter, the packaging tube 41 is discharged from the upper chamber 30 and sent to a horizontal sealing device (not shown). The horizontal sealing device is sandwiched from both sides and sealed in a horizontal direction at predetermined intervals. It is formed. Subsequently, the packaging material tube 41 is cut at the lateral seal portion to form an original container such as a pillow or bag.
[0021]
By the way, when the packaging material tube 41 is transported, it is difficult to position the packaging material tube 41 because the packaging material tube 41 has a substantially circular cross section. Therefore, when the packaging material tube 41 receives the force from the forming ring 37 and rotates, the overlap portion is displaced from the correct position. Then, when the original container is formed into a predetermined shape and the packaging container is completed with the overlap portion being shifted from the correct position, the position of the fold formed in the packaging material 11 and the position of the actual fold coincide. Otherwise, the appearance of the packaging container will be deteriorated.
[0022]
Therefore, a CCD 23 as a light detection unit is disposed in the upper chamber 30 in the vicinity of the outlet of the packaging tube 41, the overlap portion is detected based on the sensor output of the CCD 23, and the detection result of the overlap portion is detected. Based on the above, one end of the first guide roller 34 is moved in the direction of arrow B so that the overlap portion is placed at the correct position.
[0023]
In this case, the direction of the arrow B is the direction in which the packaging material 11 is transported between the transport rollers 31 and 32 and the first guide roller 34, that is, the packaging material when reaching the first guide roller 34. 11 is set in a direction parallel to the transport surface. Therefore, since the conveyance surface of the packaging material 11 sent to the first guide roller 34 coincides with the direction in which one end of the first guide roller 34 is moved, the conveyance state of the packaging material 11 is prevented from greatly changing. can do.
[0024]
In the present embodiment, one end of the first guide roller 34 is moved, but one end of the second guide roller 35 is moved, or the first and second guide rollers 34, 35 are moved. One end of the can also be moved. Further, when one end of the second guide roller 35 is moved, the direction in which the one end of the second guide roller 35 is moved is a direction in which the packaging material 11 is conveyed between the first and second guide rollers 34 and 35. That is, it is set in a direction parallel to the transport surface of the packaging material 11 when reaching the second guide roller 35.
[0025]
Next, a guide roller support mechanism for moving one end of the first guide roller 34 will be described.
[0026]
As shown in FIGS. 3 to 5, the first guide roller 34 includes a cylindrical portion 51 and a pair of bosses 52 attached in the vicinity of both ends of the inner peripheral surface of the cylindrical portion 51. Further, a shaft 53 is disposed to rotatably support the first guide roller 34, bearings B1 are disposed at both ends of the shaft 53, and the boss 52 is externally fitted to each bearing B1. Is done.
[0027]
The guide roller support mechanism includes a support portion 56 that movably supports one end of the first guide roller 34, a drive portion 57 that moves one end of the first guide roller 34, and a first guide roller. A fulcrum portion 58 that swingably supports the other end of 34 is provided. In the guide roller support mechanism, one end of the first guide roller 34 can be moved in the direction of arrow B. The forming ring 37, the first guide roller 34, the support portion 56, the drive portion 57 and the fulcrum portion 58 constitute a centering device for the packaging tube 41.
[0028]
The support portion 56 is a flange 81 fixed to the upper chamber 30, a center shaft 82 disposed so as to be movable in the vertical direction with respect to the flange 81, attached to the center shaft 82, and the flange 81 The seal plate 83 is disposed so as to be slidable with respect to the upper chamber 30 and is hermetically sealed. The cylindrical joint collar 84 fitted on one end of the center shaft 82 is provided through the joint collar 84. A slider 85 attached to one end of the center shaft 82, and a slide guide 86 disposed on both edges of the slider 85 for guiding the slider 85 in the vertical direction.
[0029]
A large diameter portion 88 is formed at the other end of the center shaft 82, and a concave portion 89 is formed in the large diameter portion 88. A ball bearing 91 is disposed in the recess 89, and one end of the shaft 53 is pivotally supported with respect to the center shaft 82 by the ball bearing 91. The flange 81 is formed with a through hole 81a that passes through the center shaft 82 so that the center shaft 82 can move in the vertical direction as the slider 85 moves in the vertical direction. The inner diameter of the hole 81 a is made larger than the outer diameter of the center portion of the center shaft 82.
[0030]
The drive unit 57 is attached to the first plate 71 attached to the upper end of the flange 81, the second plate 73 attached to the upper side of the first plate 71 via a spacer 72, and the second plate 73. A motor 74 as a driving means, a speed reducer 75 that decelerates the rotation generated by driving the motor 74, and a motion direction that converts the rotational motion of the rotation decelerated by the speed reducer 75 into a linear motion A ball screw 76 is provided as conversion means. The speed reducer 75 is a small-diameter first gear g1 attached to the output shaft 74a of the motor 74 and a large-diameter attached to a shaft 77 that is rotatably arranged with respect to the second plate 73. A second gear g2 is provided. The shaft 77 is supported by a bearing B2 in a bearing case 78 attached to the second plate 73 by bolts b3.
[0031]
The ball screw 76 is screwed with the ball screw shaft portion 79 formed in the lower half portion of the shaft 77 and the ball screw shaft portion 79, and is fixed to the upper end of the slider 85. Ball nut 80 formed.
[0032]
The fulcrum portion 58 is disposed through the bracket 61 attached to the upper chamber 30, the support block 62 attached to the bracket 61 with bolts b1 and b2, and the support block 62. A pin 63 serving as the center of swinging of the guide roller 34 is provided, and the projecting piece 54 formed at the other end of the shaft 53 is rotatably supported by the pin 63.
[0033]
Next, the operation of the guide roller support mechanism will be described.
[0034]
FIG. 6 is a control block diagram of the guide roller support mechanism according to the first embodiment of the present invention.
[0035]
In the figure, reference numeral 41 denotes a packaging material tube. Since the packaging material tube 41 is overlapped at both edges in the overlap portion S2, a step is formed on the outer peripheral surface. Reference numeral 21 denotes a light source, and the light source 21 irradiates light on a portion of the outer peripheral surface of the packaging tube 41 including at least the overlap portion S2. Therefore, the light source 21 is disposed on the tangent line of the packaging material tube 41 in the overlap portion S2 with a predetermined distance from the overlap portion S2 and facing the end surface 18 of the overlap portion S2. The And 22 is a lens as a light collecting member disposed at a predetermined position radially outward from the overlap portion S2 on the line connecting the center of the packaging tube 41 and the overlap portion S2. The lens 22 collects light generated by the light source 21 and reflected on the outer peripheral surface of the packaging tube 41.
[0036]
The CCD 23 is disposed on the line connecting the center of the packaging tube 41 and the overlap portion S2, radially outward from the overlap portion S2 and the lens 22 and on the optical axis of the lens 22. The sensor 22 receives light collected by the lens 22 and generates a sensor output. The CCD 23 may be a one-dimensional line sensor or a two-dimensional planar sensor. The lens 22 and the CCD 23 constitute an imaging means. Reference numeral 24 denotes a control unit.
[0037]
The CCD 23 is driven by a CCD drive circuit 26, and the sensor output of the CCD 23 is sent to the binarization unit 27 via the CCD drive circuit 26 and binarized by the binarization unit 27. In the present embodiment, a comparator can be used as the binarization unit 27, and the comparator compares a preset reference value with the sensor output to generate an output of 1 or 0. . The output of the binarization unit 27 is sent to the overlap portion detection processing means 28, and the overlap portion detection processing means 28 detects the overlap portion S2. When the overlap portion S2 is detected, the detection signal of the overlap portion detection processing means 28 is sent to the display device 31 such as a display, and the position of the overlap portion S2 is displayed by the display device 31. .
[0038]
By the way, when light is irradiated from the side of the packaging tube 41, the intensity of the light reflected on the end face 18 out of the light reflected on the outer peripheral surface of the packaging tube 41 is large, and a peak is formed in the sensor output of the CCD 23. Is done. Therefore, the overlap portion S2 can be detected based on the point where the peak is formed in the sensor output. In this case, the light reflected on the end face 18 has a higher intensity than the light reflected on the other part of the packaging tube 41, so that the design of the exterior of the packaging container does not become noise. Therefore, the detection accuracy of the overlap portion S2 can be increased.
[0039]
Further, the detection signal is sent to the centering processing means 43, which drives the motor 74 in correspondence with the detected position of the overlap portion S2, and the first guide roller 34 (FIG. 3). Move one end. That is, when the output shaft 74 a (FIG. 5) is rotated with the driving of the motor 74, the rotation of the output shaft 74 a is decelerated by the speed reducer 75 and transmitted to the shaft 77. As the shaft 77 is rotated, the ball nut 80 is moved in the vertical direction, and the slider 85 is moved in the vertical direction along the slide guide 86. Accordingly, the center shaft 82 is moved in the vertical direction, so that one end of the first guide roller 34 can be moved in the arrow B direction.
[0040]
In this case, the packaging material 11 (FIG. 1) is axially moved on the surface of the first guide roller 34 corresponding to the amount of movement of the center shaft 82 while being guided by the first guide roller 34. Moved. That is, the packaging material 11 can be moved in a direction perpendicular to the transport direction. Therefore, since the positions of both edges of the packaging material 11 bent by the forming ring 37 are changed, the overlap portion S2 can be moved, and the position of the overlap portion S2 can be adjusted.
[0041]
In this case, it is not necessary to press the paper guide against the edge of the packaging material 11 in order to adjust the position of the overlap portion S2, so that the edge of the packaging material 11 is not damaged.
[0042]
Moreover, since it is not necessary to extract the sample of the packaging container from the production line in order to determine whether the molding is correctly performed, the operation can be simplified and the cost of the packaging container can be reduced.
[0043]
Then, in order to detect the overlap portion S2, it is only necessary to binarize the sensor output of the CCD 23, and it is not necessary to perform image processing on the image data obtained by photographing, thereby reducing the cost of the filling machine. Can do.
[0044]
Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol.
[0045]
FIG. 7 is a front view showing a guide roller support mechanism according to the second embodiment of the present invention, FIG. 8 is a plan view showing the guide roller support mechanism according to the second embodiment of the present invention, and FIG. It is a side view which shows the guide roller support mechanism in 2nd Embodiment. For convenience of explanation, the arrow B direction in FIG. 7 is the vertical direction of the guide roller support mechanism.
[0046]
As shown in the figure, a shaft 153 is provided to rotatably support the first guide roller 134. The guide roller support mechanism includes a support portion 156 that supports one end of the first guide roller 134, a drive portion 157 that moves one end of the first guide roller 134, and the other end of the first guide roller 134. The guide roller support mechanism can move one end of the first guide roller 134 in the direction of arrow B in the guide roller support mechanism.
[0047]
The support portion 156 is a flange 181 fixed to the upper chamber 30, a center shaft 182 disposed so as to be movable in the vertical direction with respect to the flange 181, attached to the center shaft 182, and attached to the flange 181. A seal plate 183 that is slidably disposed on the upper chamber 30 to be airtight, a slider 185 attached to one end of the center shaft 182, and both edges of the slider 185, A slide guide 186 for guiding in the vertical direction is provided.
[0048]
A large diameter portion 188 is formed at the other end of the center shaft 182, and a concave portion 189 is formed in the large diameter portion 188. A ball bearing 191 is detachably disposed in the recess 189, and the ball bearing 191 pivotally supports one end of the shaft 153 with respect to the center shaft 182. The flange 181 is formed with a through hole 181a through which the center shaft 182 passes so that the center shaft 182 can move in the vertical direction as the slider 185 moves in the vertical direction. The inner diameter of the hole 181a is made larger than the outer diameter of the center portion of the center shaft 182.
[0049]
The drive unit 157 includes a plate 171 attached to the lower end of the flange 181, a motor 74 serving as a drive unit attached to the plate 171, and a deceleration that decelerates the rotation generated by driving the motor 74. And a ball screw 76 as a motion direction converting means for converting the rotational motion of the rotation decelerated by the speed reducer 75 into a linear motion. The speed reducer 75 has a small first gear g1 attached to the output shaft 74a of the motor 74 and a second large diameter attached to a shaft 177 rotatably arranged with respect to the plate 171. A gear g2 is provided. The shaft 177 is supported by a bearing B2 in the bearing case 178.
[0050]
The ball screw 76 is screwed into the ball screw shaft portion 179 formed in the upper half portion of the shaft 177 and the ball screw shaft portion 179, and is integrally formed at the lower end of the slider 185. Ball nut 180.
[0051]
The fulcrum part 158 is supported by the support block 162 attached to the upper chamber 30, a pin 163 disposed through the support block 162, and swingable with respect to the support block 162 by the pin 163. The connecting member 211 and a pin 212 that is disposed through the connecting member 211 and serves as a swing center of the first guide roller 134 are formed on the other end of the shaft 153 by the pin 212. The protruding piece 154 is rotatably supported.
[0052]
In the guide roller support mechanism configured as described above, when the output shaft 74a is rotated as the motor 74 is driven, the rotation of the output shaft 74a is decelerated by the speed reducer 75 and transmitted to the shaft 177. As the shaft 177 is rotated, the ball nut 180 is moved in the vertical direction, and the slider 185 is moved in the vertical direction along the slide guide 186. Accordingly, the center shaft 182 is moved in the vertical direction, so that one end of the first guide roller 134 can be moved in the arrow B direction.
[0053]
Further, in order to simplify the work when the packaging material 11 (FIG. 1) is set in the filling machine, the first guide roller 134 has the pin 163 pivoted as shown by the one-dot chain line in FIG. And can be swung. Therefore, a predetermined arc-shaped portion 188a of the large-diameter portion 188 can be opened and closed by a hinge (not shown), and the ball bearing 191 can be attached to and detached from the large-diameter portion 188 by opening the arc-shaped portion 188a.
[0054]
A spring 215 is disposed between the seal plate 183 and the slider 185, and the slider 185 is urged in a direction away from the seal plate 183 by the spring 215.
[0055]
In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.
[0056]
【The invention's effect】
As described above in detail, according to the present invention, in the packaging tube centering apparatus, the packaging tube forming means for forming the packaging tube by curving the web-shaped packaging material, and the conveyance of the packaging material Upstream of the packaging tube forming means in the direction, a guide roller that is rotatably arranged to guide the packaging material, a support portion that movably supports one end of the guide roller, and the other end of the guide roller And a fulcrum portion that oscillates.
[0057]
In this case, when one end of the guide roller is moved, the packaging material moves in the axial direction on the surface of the guide roller corresponding to the amount of movement of the one end of the guide roller while being guided by the guide roller. Be made. That is, the packaging material can be moved in a direction perpendicular to the transport direction. Therefore, since the positions of both edges of the packaging material that is bent by the packaging material tube forming means are changed, the overlap portion can be moved and the position of the overlap portion can be adjusted.
[0058]
Further, since it is not necessary to press the paper guide against the edge of the packaging material in order to adjust the position of the overlap portion, the edge of the packaging material is not damaged.
[0059]
In another packaging material tube centering device of the present invention, one end of the guide roller is further moved in a direction parallel to the packaging material transport surface when reaching the guide roller.
[0060]
In this case, since one end of the guide roller is moved in a direction parallel to the packaging material conveyance surface when reaching the guide roller, it is possible to prevent the packaging material conveyance state from changing greatly.
[0061]
In still another packaging material tube centering device of the present invention, one end of the guide roller is detachably disposed in the support portion.
[0062]
In this case, since one end of the guide roller is detachably disposed, the work for setting the packaging material on the filling machine can be simplified.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a main part of a filling machine according to a first embodiment of the present invention.
FIG. 2 is a conceptual diagram of a conventional filling machine.
FIG. 3 is a front view showing a guide roller support mechanism according to the first embodiment of the present invention.
FIG. 4 is a plan view showing a guide roller support mechanism according to the first embodiment of the present invention.
FIG. 5 is a side view showing a guide roller support mechanism according to the first embodiment of the present invention.
FIG. 6 is a control block diagram of the guide roller support mechanism according to the first embodiment of the present invention.
FIG. 7 is a front view showing a guide roller support mechanism in a second embodiment of the present invention.
FIG. 8 is a plan view showing a guide roller support mechanism in a second embodiment of the present invention.
FIG. 9 is a side view showing a guide roller support mechanism according to a second embodiment of the present invention.
[Explanation of symbols]
11 Packaging material 28 Overlap portion detection processing means 34, 134 First guide roller 37 Forming ring 41 Packaging tube 43 Centering processing means 56, 156 Support portion 57, 157 Drive portion 58, 158 Supporting portion S2 Overlap portion

Claims (5)

(A) a packaging material tube forming means for curving the web-shaped packaging material to form a packaging material tube;
(B) a guide roller that is rotatably arranged upstream of the packaging tube forming means in the conveying direction of the packaging material and guides the packaging material;
(C) a support portion that movably supports one end of the guide roller;
(D) A wrapping tube centering device having a fulcrum portion that supports the other end of the guide roller in a swingable manner. 2. The packaging tube centering device according to claim 1, wherein one end of the guide roller is moved in a direction parallel to a conveying surface of the packaging material when reaching the guide roller. The packaging tube centering device according to claim 1, further comprising a drive unit for moving one end of the guide roller. 2. The packaging tube centering device according to claim 1, wherein one end of the guide roller is detachably disposed in the support portion. (A) an overlap portion detection processing means for detecting an overlap portion of the packaging material tube;
(B) Centering apparatus of packaging material tube of Claim 1 which has a centering process means to which the end of the said guide roller is moved based on the detection result by this overlap part detection process means.

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