JP2003321005A - Centering device of packing material tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control the position of an overlapped section without damaging the edge of a packing material. <P>SOLUTION: In a packing material formation means which forms a packing material tube 41 by curving a web-like packing material 11 and in the upstream side from the packing material tube formation means in the carrier direction of the packing material, the centering device has a guide roller which is rotatably disposed and guides the material 11, a support section which movably supports one end of the guide roller and a fulcrum which rockably supports another of the guide roller. If the one end of the guide roller is moved, the material 11 can be moved in a right-angled direction to the carrier direction thereof, and the overlapped section can be moved. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging tube centering device.

[0002]

2. Description of the Related Art Conventionally, in a filling machine for producing a packaging container filled with liquid food such as milk and soft drink, a web-shaped packaging material is continuously formed into a tube shape while being conveyed, A packaging container is manufactured by filling a tubular packaging material with a liquid food.

FIG. 2 is a conceptual diagram of a conventional filling machine.

In the figure, numeral 11 is a packaging material, and the packaging material 1
1 is set in the filling machine in the state of the reel 12, is fed by a feeding machine (not shown), and is conveyed in a web-like shape in the filling machine.

Subsequently, the web-shaped packaging material 11 is gradually curved while being guided by a forming ring (not shown), formed into a tube, and vertically sealed by a vertical sealing device (not shown). Then, while the tubular packaging material 11 is conveyed downward as a packaging material tube, the liquid food is supplied from above through the filling pipe 13 and filled in the packaging material tube. Next, the packaging material tube is sandwiched from both sides and laterally sealed at a predetermined interval to form a prototype container 14 having a pillow shape, a bag shape, or the like.

Subsequently, the prototype container 14 is separated by cutting the laterally extending seal portion, that is, the horizontal seal portion S1, and each prototype container 14 is formed into a predetermined shape along a pre-formed crease. By
The packaging container 15 is completed.

However, when the packaging tube is transported,
Since the packaging tube has a substantially circular cross section, it is difficult to position the packaging tube. Therefore, the packaging material tube receives the force from the forming ring and the arrow A
When it is rotated in the 1 and A2 directions, the seal portion extending in the vertical direction, that is, the overlap portion S2 is displaced from the correct position. Then, when the prototype container 14 is molded into a predetermined shape and the packaging container 15 is completed while the overlap portion S2 is displaced from the correct position, the position of the fold formed in the packaging material 11 in advance and the position of the actual fold. Does not match, and the appearance of the packaging container 15 deteriorates.

Therefore, a paper guide (not shown) is arranged in the conveyance path of the web-shaped packaging material 11, and the paper guide is pressed against the edge portion of the packaging material 11 so that the packaging material 11 is perpendicular to the conveyance direction. The position of the overlap portion S2 is adjusted by moving the overlap portion S2.

[0009]

However, in the above-mentioned conventional filling machine, it is necessary to press the paper guide against the edge portion of the packaging material 11, so that the edge portion of the packaging material 11 is damaged.

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 overlapping portion without damaging the edge of the packaging material. The purpose is to provide.

[0011]

To this end, in the packaging material tube centering device of the present invention, a packaging material tube forming means for forming a packaging material tube by bending a web-shaped packaging material, and the packaging material tube forming means. A guide roller that is rotatably disposed upstream of the packaging material tube forming means in the transport direction and that guides the packaging material, a support portion that movably supports one end of the guide roller, and other guide rollers. And a fulcrum portion that swingably supports the end.

In another packaging tube centering device of the present invention, one end of the guide roller is further
It is moved in a direction parallel to the conveying surface of the packaging material when reaching the guide roller.

In still another packaging material tube centering device of the present invention, a drive portion for moving one end of the guide roller is further provided.

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.

In still another packaging material tube centering device of the present invention, an overlap portion detection processing means for detecting an overlap portion of the packaging material tube and a detection result by the overlap portion detection processing means are further provided. Based on the above, there is provided centering processing means for moving one end of the guide roller.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a conceptual view 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 supporting mechanism according to the first embodiment of the present invention, and FIG. Is a plan view showing the guide roller support mechanism in the first embodiment of the present invention, 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 direction of arrow A in FIG. 1 is the vertical direction of the guide roller support mechanism.

In the figure, 11 is a web-shaped packaging material, 30
Is an upper chamber arranged at the top of the filling machine,
The packaging material 11 is set in the filling machine in the state of the reel 12 (see FIG. 2), and is delivered by a delivery machine (not shown) to be conveyed in a web-like shape in the filling machine. In this case, as shown in FIG. 1, the packaging material 11 conveyed upward in the arrow direction and supplied to the upper chamber 30.
After being sandwiched by the conveying rollers 31 and 32, the sheet is conveyed obliquely upward and is sent to the air knife section 33. Subsequently, the packaging material 11 is conveyed obliquely upward in the air knife portion 33, and the sterilizing agent and the like attached to the packaging material 11 is removed by hot air discharged from a nozzle (not shown) during that time.

The packaging material 11 discharged from the air knife portion 33
Is sent to the first guide roller 34, guided by the first guide roller 34, then conveyed downward, and sent to the second guide roller 35. Then, the packaging material 11 is guided by the second guide roller 35, then conveyed obliquely upward, sent to the third guide roller 36, and guided by the third guide roller 36. , Is conveyed downward, is gradually curved while being guided by a forming ring 37 as a packaging material tube forming means, is formed into a tube shape, and is longitudinally sealed by a vertical sealing device (not shown) to form a tubular shape. It becomes the material 11, that is, the packaging material tube 41. The second guide roller 35 is configured as a crease roller and forms a fold line on the packaging material 11. Then, while the packaging material tube 41 is conveyed downward, the liquid food is supplied from above through a filling pipe (not shown) to fill the packaging material tube 41. The first to third
The guide rollers 34 to 36 guide the packaging material 11 on the upstream side of the forming ring 37 in the transport direction of the packaging material 11.

Thereafter, the packaging material tube 41 is discharged from the upper chamber 30 and sent to a horizontal sealing device (not shown), and is clamped from both sides in the horizontal sealing device.
Lateral seals are formed by laterally sealing at predetermined intervals. Subsequently, the packaging material tube 41 is cut at the lateral seal portion to form a pillow-shaped, bag-shaped, or other prototype container.

By the way, when the packaging material tube 41 is conveyed, it is difficult to position the packaging material tube 41 because the packaging material tube 41 has a substantially circular cross section. Therefore, the packaging material tube 41 is formed by the forming ring 37.
When it is rotated by receiving force from, the overlapping part will be displaced from the correct position. Then, when the prototype container is molded into a predetermined shape and the packaging container is completed with the overlapping portion being displaced from the correct position, the position of the fold previously formed on the packaging material 11 and the position of the actual fold match. Otherwise, the appearance of the packaging container will deteriorate.

Therefore, a C as a photodetector is provided near the outlet of the packaging material tube 41 in the upper chamber 30.
The CD 23 is provided, the overlap portion is detected based on the sensor output of the CCD 23, and the first guide roller 34 is detected based on the detection result of the overlap portion.
One end of the is moved in the direction of arrow B so that the overlapping portion is placed at the correct position.

In this case, the direction of the arrow B is the direction in which the packaging material 11 is conveyed between the conveying rollers 31, 32 and the first guide roller 34, that is, when it reaches the first guide roller 34. It is set in a direction parallel to the transport surface of the packaging material 11. Therefore, the conveying surface of the packaging material 11 sent to the first guide roller 34 and the direction in which one end of the first guide roller 34 is moved coincide with each other, so that the conveying state of the packaging material 11 is prevented from largely changing. can do.

Although in the present embodiment, one end of the first guide roller 34 is moved,
The one end of the second guide roller 35 is moved, the first,
It is also possible to move one end of the second guide rollers 34, 35. When moving one end of the second guide roller 35, the direction in which one end of the second guide roller 35 is moved is the direction in which the packaging material 11 is conveyed between the first and second guide rollers 34, 35. That is, it is set in a direction parallel to the conveying surface of the packaging material 11 when reaching the second guide roller 35.

Next, a guide roller support mechanism for moving one end of the first guide roller 34 will be described.

As shown in FIGS. 3 to 5, the first guide roller 34 includes a tubular portion 51 and a pair of bosses 5 mounted near both ends of the inner circumferential surface of the tubular portion 51.
2 is provided. Further, a shaft 53 is provided to rotatably support the first guide roller 34, bearings B1 are provided at both ends of the shaft 53, and the boss 52 is externally fitted to each bearing B1. To be done.

The guide roller support mechanism includes a support portion 56 for movably supporting one end of the first guide roller 34, a drive portion 57 for moving one end of the first guide roller 34, and a first portion. The guide roller 34 is provided with a fulcrum portion 58 that supports the other end of the guide roller 34 in a swingable manner, and one end of the first guide roller 34 can be moved in the arrow B direction in the guide roller support mechanism. The forming ring 37, the first guide roller 34, the support portion 56, the drive portion 57, and the fulcrum portion 58 form a centering device for the packaging material tube 41.

The supporting portion 56 is a flange 81 fixed to the upper chamber 30, and a center shaft 8 is provided so as to be movable in the vertical direction with respect to the flange 81.
2, mounted on the center shaft 82 and arranged so as to be slidable with respect to the flange 81,
Seal plate 8 for keeping the inside of the upper chamber 30 airtight
3, a cylindrical joint collar 84 fitted on one end of the center shaft 82, a slider 85 attached to one end of the center shaft 82 via the joint collar 84, and arranged on both edges of the slider 85. , A slide guide 86 for guiding the slider 85 in the vertical direction.

A large diameter portion 88 is formed at the other end of the center shaft 82, and a recess 89 is formed in the large diameter portion 88. A ball bearing 91 is arranged in the recess 89, and one end of the shaft 53 is pivotally supported by the ball bearing 91 with respect to the center shaft 82. A through hole 81a is formed in the flange 81 for allowing the center shaft 82 to pass therethrough 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 81a is made larger than the outer diameter of the center portion of the center shaft 82.

The drive unit 57 includes a first plate 71 attached to the upper end of the flange 81, a second plate 73 attached above the first plate 71 via a spacer 72, and a second plate 73. A motor 74 as a driving means attached to the motor, and a speed reducer 7 that reduces the rotation generated by driving the motor 74.
5 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 is
A small diameter first gear g1 attached to the output shaft 74a of the motor 74 and a large diameter second gear attached to a shaft 77 rotatably arranged with respect to the second plate 73.
The 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 a bolt b3.

Further, 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 the slider 85 of the slider 85. It consists of a ball nut 80 fixed to the upper end.

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 by bolts b1 and b2, and the support block 62. The pin 6 serving as the swing center of the first guide roller 34
3, the projection 63 formed at the other end of the shaft 53 is rotatably supported by the pin 63.

Next, the operation of the guide roller support mechanism will be described.

FIG. 6 is a control block diagram of the guide roller support mechanism according to the first embodiment of the present invention.

In the figure, 41 is a packaging tube,
Since both edges of the packaging material tube 41 are overlapped at the overlapping portion S2, a step is formed on the outer peripheral surface. Further, 21 is a light source, and the light source 21 includes at least the overlap portion S on the outer peripheral surface of the packaging material tube 41.
The part including 2 is irradiated with light. Therefore, the light source 21
Is the packaging material tube 4 in the overlap portion S2.
On the tangent line of No. 1, it is arranged at a predetermined distance from the overlapping portion S2 and facing the end surface 18 of the overlapping portion S2. Reference numeral 22 denotes a lens as a light condensing member arranged at a predetermined position radially outward of the overlap portion S2 on a line connecting the center of the packaging material tube 41 and the overlap portion S2, The lens 22 collects the light generated by the light source 21 and reflected by the outer peripheral surface of the packaging material tube 41.

The CCD 23 is a packaging material tube 4
On the line connecting the center of 1 and the overlap portion S2, the light collected by the lens 22 is arranged radially outward of the overlap portion S2 and the lens 22 and on the optical axis of the lens 22. It receives and produces a sensor output. The CCD 23 may be a one-dimensional line sensor or a two-dimensional planar sensor. The lens 2
2 and the CCD 23 constitute an image pickup means. In addition, 24 is a control part.

The CCD 23 is driven by the CCD driving circuit 26, and the sensor output of the CCD 23 is sent to the binarizing unit 27 via the CCD driving circuit 26, and the binarizing unit 27
Is binarized at. 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 part detection processing means 28, and the overlap part detection processing means 28 detects the overlap part S2. When the overlap portion S2 is detected,
The detection signal of the overlap portion detection processing means 28 is sent to a display device 31 such as a display, and the display device 31 displays the position of the overlap portion S2.

By the way, when the packaging material tube 41 is irradiated with light from the side, the intensity of the light reflected on the end surface 18 of the light reflected on the outer peripheral surface of the packaging material tube 41 is high, and the sensor output of the CCD 23 is detected. Peaks are formed. Therefore, the overlap portion S2 can be detected based on the point where the sensor output has a peak. In this case, since the light reflected by the end face 18 has a higher intensity than the light reflected by the other part of the packaging material tube 41, the exterior design of the packaging container does not become noise. Therefore, the overlap portion S2
It is possible to increase the detection accuracy of.

Further, the detection signal is sent to the centering processing means 43, and the centering processing means 43 drives the motor 74 in correspondence with the detected position of the overlap portion S2, and the first guide roller 34 ( Move one end of Fig. 3). That is, when the output shaft 74a (FIG. 5) is rotated in accordance with the driving of the motor 74, the output shaft 7
The rotation of 4a is reduced by the speed reducer 75 and transmitted to the shaft 77. Then, 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. Along with that, 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 direction of arrow B.

In this case, the packaging material 11 (FIG. 1) corresponds to the amount of movement of the center shaft 82 while being guided by the first guide roller 34, and the first guide roller 3
4 is moved axially over the surface. That is, the packaging material 11 can be moved in a direction perpendicular to the transport direction. Therefore, the positions of both edges of the packaging material 11 curved by the forming ring 37 change,
The overlap part S2 can be moved, and the position of the overlap part S2 can be adjusted.

In this case, since 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 overlapping portion S2, the edge of the packaging material 11 is not damaged.

Further, since it is not necessary to extract the sample of the packaging container from the production line in order to judge whether or not the molding is properly performed, the work can be simplified and the cost of the packaging container can be reduced. You can

Further, 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, so the cost of the filling machine is reduced. Can be lowered.

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 giving the same code | symbol.

FIG. 7 is a front view showing a guide roller supporting mechanism according to the second embodiment of the present invention, FIG. 8 is a plan view showing the guide roller supporting 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 the 2nd Embodiment of this invention. For convenience of explanation, the direction of arrow B in FIG. 7 is the vertical direction of the guide roller support mechanism.

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 and the first guide roller 134.
Of the guide roller 134, the drive portion 157 for moving one end of the guide roller 134 and the fulcrum portion 158 for swingably supporting the other end of the first guide roller 134. Guide roller 134
Can be moved in the direction of arrow B.

The supporting portion 156 is the upper chamber 3
A flange 181 fixed to 0, and a center shaft 1 movably arranged in the vertical direction with respect to the flange 181.
82, attached to the center shaft 182, and
A seal plate 18 slidably arranged with respect to the flange 181 to keep the upper chamber 30 airtight
3, a slider 185 attached to one end of the center shaft 182, and slide guides 186 arranged on both edges of the slider 185 and vertically guiding the slider 185.

A large diameter portion 188 is formed at the other end of the center shaft 182, and the concave portion 1 is formed in the large diameter portion 188.
89 is formed. Then, the ball bearing 1 is placed in the recess 189.
91 is detachably arranged, and one end of the shaft 153 is attached to the center shaft 182 by the ball bearing 191.
Is pivotally supported against. In addition, the slider 18
The center shaft 18
The flange 181 is formed with a through hole 181a through which the center shaft 182 penetrates so that the 2 can move in the vertical direction, and the inner diameter of the through hole 181a is made larger than the outer diameter of the center portion of the center shaft 182. It

Further, the driving unit 157 has the flange 18
A plate 171 attached to the lower end of 1, a motor 74 as a driving means attached to the plate 171;
A speed reducer 75 for reducing 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 reduced by the speed reducer 75 into a linear motion. Prepare The speed reducer 75 has an output shaft 74a of the motor 74.
Small-diameter first gear g1 attached to the plate, and plate 1
A large-diameter second gear g2 attached to a shaft 177 rotatably arranged with respect to the gear 71 is provided. The shaft 177 is a bearing B in a bearing case 178.
Supported by two.

The ball screw 76 has a ball screw shaft portion 179 formed in the upper half of the shaft 177.
And a ball nut 180 screwed with the ball screw shaft portion 179 and integrally formed at the lower end of the slider 185.

The fulcrum portion 158 is swingable with respect to the support block 162 by the support block 162 attached to the upper chamber 30, the pin 163 penetrating the support block 162, and the pin 163. And a connecting member 211 supported by the connecting member 211
And a pin 212 which is disposed so as to penetrate through the first guide roller 134 and serves as a swing center of the first guide roller 134.
A projecting piece 154 formed on the other end of the shaft 153 is rotatably supported.

In the guide roller support mechanism having the above structure, when the output shaft 74a is rotated by the driving of the motor 74, the rotation of the output shaft 74a is reduced by the reduction gear 75 and transmitted to the shaft 177. Then, 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. Along with that, 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.

Further, in order to simplify the work for setting the packaging material 11 (FIG. 1) in the filling machine, the first guide roller 134 is provided with the pin 1 as shown by the one-dot chain line in FIG.
It is possible to swing around 63 as the swing center. Therefore, a predetermined arc-shaped portion 188a of the large-diameter portion 188 is 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.

A spring 215 is disposed between the seal plate 183 and the slider 185,
The spring 215 biases the slider 185 in a direction away from the seal plate 183.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the present invention, and they are not excluded from the scope of the present invention.

[0056]

As described above in detail, according to the present invention, in the packaging material tube centering device, packaging material tube forming means for bending a web-shaped packaging material to form a packaging material tube, A guide roller that is rotatably disposed upstream of the packaging material tube forming means in the transport direction of the packaging material and that guides the packaging material; and a support portion that movably supports one end of the guide roller, The other end of the guide roller is supported so as to be swingable.

In this case, when one end of the guide roller is moved, the packaging material corresponds to the amount of movement of one end of the guide roller while being guided by the guide roller.
It can be moved axially on the surface of the guide roller. 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 curved by the packaging material tube forming means change,
The overlap part can be moved, and the position of the overlap part can be adjusted.

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 overlapping portion, the edge of the packaging material is not damaged.

In another packaging tube centering device of the present invention, one end of the guide roller is further
It is moved in a direction parallel to the conveying surface of the packaging material when reaching the guide roller.

In this case, since one end of the guide roller is moved in a direction parallel to the conveying surface of the packaging material when reaching the guide roller, it is possible to prevent the conveying state of the packaging material from being greatly changed. it can.

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.

In this case, since one end of the guide roller is detachably arranged, the work for setting the packaging material in the filling machine can be simplified.

[Brief description of 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 a 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 according to a second embodiment of the present invention.

FIG. 8 is a plan view showing a guide roller support mechanism according to the second embodiment of the present invention.

FIG. 9 is a side view showing a guide roller support mechanism according to the second embodiment of the present invention.

[Explanation of symbols]

11 packaging materials 28 Overlap detection processing means 34, 134 First guide roller 37 Forming Ring 41 Packaging tube 43 Centering processing means 56, 156 support 57,157 Drive unit 58,158 Support points S2 Overlap part

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Claims (5)

[Claims] 1. A packaging material tube forming means for bending a web-shaped packaging material to form a packaging material tube, and (b) an upstream side of the packaging material tube forming means in a transport direction of the packaging material. A guide roller that is rotatably arranged and guides the packaging material, (c) a support portion that movably supports one end of the guide roller, and (d) a swingable support of the other end of the guide roller. Centering device for a packaging material tube having a fulcrum part that 2. The packaging material 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. 3. The packaging material tube centering device according to claim 1, further comprising a drive unit for moving one end of the guide roller. 4. The packaging tube centering device according to claim 1, wherein one end of the guide roller is detachably disposed in the support portion. 5. (a) Overlap portion detection processing means for detecting an overlap portion of the packaging tube,
2. The packaging material tube centering device according to claim 1, further comprising: (b) a centering processing unit that moves one end of the guide roller based on a detection result of the overlapping portion detection processing unit.