JP4294285B2 - Feeding and processing control method and apparatus for strip film raw material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to a production line of a flexible container used in a medical field, and a belt-like film raw material is engaged with a plurality of feeding devices in a longitudinal direction, and heat processing such as heat sealing is performed in the middle. The present invention relates to a method and apparatus for feeding and processing a strip-shaped film raw material that is continuously or intermittently fed and cut into a predetermined length at the final stage of the feeding process.
[0002]
[Prior art]
A flexible container with a stopper, such as a flexible container used in medical settings, is fed by engaging a belt-shaped film raw material with a plurality of feeding devices in the longitudinal direction and applying heat processing such as heat sealing in the middle. As a means for cutting the film raw material into a predetermined shape at the final stage of the feeding process, the invention of Patent Document 1 (Japanese Patent No. 3115375) is provided.
[0003]
In such an invention, in manufacturing a flexible container with a cap, a predetermined position of the film raw material is heat-sealed in the width direction during the process of transferring the film raw material continuously formed into a cylindrical shape. In the continuous bag making process of cutting the seal portion and sequentially forming the bag-like container, the heat seal portion in the width direction of the film raw material heat-sealed in a stationary state is pinched in the same position while still in the stationary state. It cools, the cooled film raw material is moved over a predetermined distance in the transfer direction, and is configured to be used in a subsequent process.
[0004]
[Patent Document 1]
Japanese Patent No. 3115375 [0005]
[Problems to be solved by the invention]
When the strip-shaped film raw material is subjected to thermal processing such as heat sealing in the middle of feeding and processed and finally cut to cut out the flexible container, deformation of the film raw material accompanying the thermal processing, processing machine ( Due to the stoppage of the bag making machine), environmental conditions, etc., it is inevitable that the film raw material shrinks in the longitudinal direction.
However, in the invention of Patent Document 1, the film raw material is transferred to the downstream side while holding the pressure-sealed portion of the heat-sealed portion in the heat sealing portion with the cooling holding member of the cooling portion. Even if the film raw material is softened by being heated at the time of heat sealing, the film raw material can be transferred without expansion and contraction, and since the heat seal portion of the transferred film raw material is cooled, the cutting position is distorted at the time of cutting after the transfer. Although it has the advantage that it does not occur, since the expansion of the heat-sealed part can only be restored by cooling, the film raw material is caused by causes other than thermal conditions such as stoppage of the processing machine (bag making machine) and environmental conditions In such a case, the expansion and contraction of the film raw material cannot be restored on the downstream side of the film raw material transfer. Becomes mixed by expansion and contraction of wood, hard uniform product (flexible container) is obtained.
And so on.
[0006]
In view of the problems of the prior art, the present invention provides a flexible product by producing a flexible product by cutting and finally cutting a belt-shaped film raw material while performing heat processing such as heat sealing on the way. Even if the expansion and contraction of the raw material occurs, it is possible to adjust the feed amount of the film raw material with respect to the expansion and contraction with high accuracy. It is an object of the present invention to provide a feeding / processing control method and apparatus for the obtained strip film raw material.
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides a heat processing such as a heat seal by engaging a plurality of belt-shaped film raw materials with a plurality of feeding devices installed along the feeding direction. In the feeding / processing control method of the strip-shaped film raw material that is fed continuously or intermittently, and the film raw material is cut into a predetermined length at the final stage of the feeding process,
A dancer roll is provided between the feeding devices so as to change the feeding amount between the upstream side and the downstream side in the feeding direction, and the upstream side of the dancer roll is filled in the feeding direction and the width direction of the strip film raw material. A vertical heat seal for forming a bag and a bottom heat seal are applied so that the upper and lower films are bonded, and the vertical heat seal is formed in the feeding direction of the belt-shaped film raw material and corresponds to both sides of the filling bag parts in drilled holes for conveyance, respectively, detects the hole position deviation from a normal position of the holes relative to cut position by detecting the position of the holes in the immediately upstream portion of the cutting portion at the dancer roll downstream Then, a feed amount correction amount corresponding to the hole position deviation is calculated, and based on the correction amount, the feed amount of the feed device located on the downstream side of the dancer roll is set so that the hole position becomes a normal position. And integer, proposes a feeding and processing method of controlling a filmstrip raw material, characterized in that cutting the film raw material by subsequent cutting device.
[0008]
In Claim 1, Preferably, the feeder device on the upstream side of the dancer roll feeds the film raw material at a constant feed amount, and the film on the basis of the correction amount by the feeder device on the downstream side of the dancer roll. The feed amount of the raw material is adjusted so that the position of the hole becomes a normal position.
[0009]
The invention described in claims 3 to 4 relates to the invention of the apparatus for carrying out the inventions of claims 1 and 2, and the invention of claim 3 is a plurality of feeds installed along the feed direction of the strip-shaped film raw material. The film raw material is engaged with the apparatus, and heat processing such as heat sealing is performed on the way to send continuously or intermittently, and the film raw material is cut into a predetermined length at the final stage of the feeding process. In the belt-film raw material feed / processing control device provided with a cutting device, a dancer roll is provided between the feed devices to change the feed amount between the upstream side and the downstream side in the feed direction. At the upstream side of the dancer roll, a vertical heating seal for forming a filling bag and a bottom heating seal are applied in the feeding direction and the width direction of the belt-shaped film raw material, and the upper and lower films are bonded, and the belt-shaped film raw material In the feed direction Is made are holes for conveying each vertical heated sealing portion corresponding to both side portions of the filling bag is perforated, hole positions for detecting the position of the holes in the immediately upstream portion of the cutting portion at the dancer roll downstream Detector, hole position deviation calculating means for calculating a hole position deviation between the detected value of the hole position and the normal position of the hole with respect to the cutting position, and a feed amount for calculating a feed amount correction amount corresponding to the hole position deviation A controller having a correction amount calculating means, and configured to adjust the feed amount of the feed device located downstream of the dancer roll based on the feed amount correction amount so that the position of the hole is a normal position; It is characterized by becoming.
[0010]
According to a fourth aspect of the present invention, in the third aspect, the hole position detector comprises a CCD camera, and the hole position deviation calculating means of the controller performs image processing on the image from the CCD camera to detect the detected value of the hole position and the hole. It is configured to calculate a hole position deviation from a normal position.
[0011]
According to the invention, the position of the longitudinal hole formed in the heating sheet of a feeding direction of the film raw material, detected by the hole position detector, the film raw materials on the basis of the detected hole position detected value The feed amount correction amount is calculated and fed back to the feed device located downstream of the dancer roll, and the feed amount of the feed device is controlled so that the position of the hole is a normal position with respect to the cutting position. Therefore, the film raw material fed into the cutting device is controlled in such a feed amount that the position of the pin hole with respect to the cutting position in the cutting device becomes a normal position, and the film raw material is placed at the pin hole position. On the other hand, it can always be cut at the normal position.
[0012]
As a result, the film raw material feed amount can be adjusted with high accuracy regardless of the cause of expansion and contraction of the film raw material due to thermal shrinkage, stoppage of processing machines such as bag making machines, environmental conditions, etc. It is possible to provide a method and apparatus for controlling the feeding and processing of a strip-shaped film raw material that can be held in a uniform length without any deviation in the cutting position and obtain a flexible product with stable quality.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
[0014]
FIG. 1 is a configuration diagram of a belt-film raw material feeding / processing apparatus used for manufacturing a bag for filling medical liquid or the like according to an embodiment of the present invention, and FIG. 2 is a control block diagram of the embodiment. 3A and 3B show an operation process in the bag making machine, FIG. 3A is a plan explanatory view, and FIG. 3B is a perspective view of a film raw material.
[0015]
In the bag making machine 100 according to the present invention, after the film raw material 101 (see FIG. 3 (B)) formed in the upper and lower layers is subjected to the sealing process in the vertical direction and the horizontal direction, the outer shape of the filling bag body The present invention relates to a method for feeding and processing a filling bag 1 and a device for manufacturing the bag body of the filling bag 1 by cutting it into a predetermined shape along the shape.
[0016]
First, a procedure for manufacturing a bag body of the filling bag 1 in the bag making machine 100 will be described.
101 is a film raw material for manufacturing the filling bag 1, and is formed of a flexible synthetic resin material such as polyethylene formed in a double layer on the upper and lower sides as shown in FIG. ing.
In the bag making machine 100, as shown in FIG. 3A, while feeding the film raw material 101 (the arrow in the figure is the feed direction), the width direction is 4 rows (1 row or multiple rows). The vertical seals 5 for the four filling bags are applied in the longitudinal direction by a predetermined length determined by the length of the filling bag 1, and the upper and lower films of the film raw material 101 are bonded. Next, one bottom seal 16 is applied between the vertical seals 5 for each filling bag (step 1).
[0017]
Next, four (as long as it is an even number) conveying pin holes 015 are formed per filling bag (step 2). Next, a portion corresponding to the width dimension of the filling bag 1 is cut in the vertical direction (longitudinal direction), and further, a portion corresponding to the length dimension of the filling bag 1 is cut in the horizontal direction (step 3).
The intermediate body of the filling bag 1 by which the vertical seal | sticker 5 is given to both sides by the above process, the bottom seal | sticker 16 is given to the bottom part, respectively, and the two pin holes 015 for conveyance are pierced on both sides part is manufactured.
[0018]
Next, a method and apparatus for controlling the feeding and processing of the film raw material 101 in the bag making machine 100 that forms the core of the present invention will be described with reference to FIGS.
In FIG. 1, the film raw material 101 is transferred along the arrow direction of FIG. Reference numeral 1020 denotes an upstream feeding device that clamps the width direction of the upstream film raw material 101a with respect to a dancer roll 107, which will be described later, and transports the film with a constant feeding amount.
[0019]
Reference numeral 104 denotes a seal cooling device, as shown in Step 1 of FIG. 3A. The longitudinal seal 5 and the bottom seal 16 for four rows in the width direction, that is, four filling bags, are determined by the length of the filling bag 1 in the longitudinal direction. The upper and lower films of the film raw material 101 are bonded together by applying a heat seal to a predetermined length and cooling.
Reference numeral 105 denotes a pin hole punching device, which punches four conveying pin holes 015 per filling bag in the film raw material 101 as in step 2 of FIG.
[0020]
Reference numeral 107 denotes a dancer roll between an upstream film raw material 101a whose feeding amount is controlled by the upstream feeding device 1020 and a downstream film raw material 101b whose feeding amount is controlled by a downstream feeding device 108 described later. It is a roll of a movable pulley type provided (the structure of the dancer roll itself is known).
Reference numeral 108 denotes a downstream feeding device that clamps the width direction of the downstream film raw material 101b with respect to a dancer roll 107, which will be described later, and transports it with a feeding amount controlled by a controller 111, which will be described later.
Reference numeral 112 denotes a cutting device, which cuts a portion corresponding to the width dimension of the filling bag 1 in the longitudinal direction (longitudinal direction) as shown in Step 3 of FIG. The corresponding part is cut in the lateral direction. Reference numeral 0113 denotes a pallet for transporting the filled bag 1 (intermediate body) after cutting.
[0021]
Reference numeral 109 denotes a CCD camera that takes an image of a pin hole 015 (see FIG. 3) of the downstream film raw material 101b at a position immediately upstream of the cutting device 112. An image signal taken by the CCD camera 109 is input to the controller 111. . Reference numeral 110 denotes a light source for the CCD camera 109.
[0022]
Next, the film raw material feed amount control means in the film raw material feed / processing apparatus of the bag making machine having such a configuration will be described with reference to FIG.
An image signal of the pin hole 015 photographed by the CCD camera 109 is input to the hole position deviation calculating unit 113 of the controller 111. Reference numeral 114 denotes a hole position setting unit in which a normal position of the pin hole 015 with respect to the cutting position in the cutting device 112 is set.
In the hole position deviation calculation unit 113, the captured image signal of the pin hole 015 from the CCD camera 109 is subjected to image processing, and the detection position of the pin hole 015 and the pin hole 015 set in the hole position setting unit 114 are processed. The hole position deviation from the normal position is calculated. The position of the pin hole 015 is, as shown in FIG. 2B, when the downstream film raw material 101b is shrunk, the position of the pin hole 015 is b downstream from the normal position in the feed direction. When the downstream film raw material 101b is stretched at 015a, it is at 015b upstream of the normal position by a relative to the feed direction.
[0023]
Therefore, the hole position deviation calculating unit 113 calculates the hole position deviation a or b of the pin hole 015 and inputs it to the feed amount correction calculating unit 115.
In the feed amount correction calculation unit 115, the feed amount correction amount corresponding to the hole position deviation a or b, that is, the hole position deviation a or b is 0 (zero) based on the hole position deviation a or b. Then, a feed amount correction amount is calculated so that the hole position of the pin hole 015 becomes the normal position, and is output to the downstream side feed device 108.
In the downstream side feeding device 108, the downstream side film raw material 101b is transported by a corrected feeding amount obtained by increasing or decreasing the feeding amount correction amount to the current feeding amount.
[0024]
As a result, the downstream film raw material 101b fed to the cutting device 112 is controlled in the feed amount so that the position of the pin hole 015 relative to the cutting position in the cutting device 112 is the normal position. The material 101 is always cut at a normal position with respect to the position of the pin hole 015.
[0025]
【The invention's effect】
As described above, according to the present invention, the position of the hole punched in the vertical heating sheet portion, which is the feed direction of the film raw material, is detected by the hole position detector, and the detected hole position detection value is obtained. Based on this, the feed amount correction amount of the film raw material is calculated and fed back to the feed device located on the downstream side of the dancer roll, and the feed amount of the feed device is set to the normal position with respect to the cutting position. Therefore, the film raw material is fed to the cutting device with the feed amount controlled so that the hole position with respect to the cutting position becomes a normal position, and the film raw material is sent to the hole position. It can always be cut at the regular position.
[0026]
As a result, the film raw material feed amount can be adjusted with high accuracy regardless of the cause of expansion and contraction of the film raw material due to thermal shrinkage, stoppage of processing machines such as bag making machines, environmental conditions, etc. It is possible to provide a method and apparatus for controlling the feeding and processing of a strip-shaped film raw material that can be held in a uniform length without any deviation in the cutting position and obtain a flexible product with stable quality.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an apparatus for feeding and processing a strip-shaped film raw material used for manufacturing a bag body for filling medical liquid or the like according to an embodiment of the present invention.
FIG. 2 is a control block diagram in the embodiment.
FIGS. 3A and 3B show an operation process in a bag making machine, FIG. 3A is a plan view, and FIG. 3B is a perspective view of a film raw material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filling bag 5 Vertical seal 015 Pin hole 100 Bag making machine 101 Film raw material 101a Upstream side film raw material 101b Downstream side film raw material 1020 Upstream side feeding device 104 Seal cooling device 105 Pin hole punching device 107 Dancer roll 108 Downstream side feeding Device 109 CCD camera 110 Light source 111 Controller 112 Cutting device 113 Hole position deviation calculation unit 114 Hole position setting unit 115 Feed amount correction calculation unit

Claims (4)

The belt-shaped film raw material is engaged with a plurality of feeding devices installed along the feeding direction, and heat processing such as heat sealing is performed on the way to send it continuously or intermittently. In the feed / processing control method of the strip-shaped film raw material that is cut into a predetermined length in the film raw material in the stage,
A dancer roll is provided between the feeding devices so as to change the feeding amount between the upstream side and the downstream side in the feeding direction, and the upstream side of the dancer roll is filled in the feeding direction and the width direction of the strip film raw material. A vertical heat seal for forming a bag and a bottom heat seal are applied so that the upper and lower films are bonded, and the vertical heat seal is formed in the feeding direction of the belt-shaped film raw material and corresponds to both sides of the filling bag parts in drilled holes for conveyance, respectively, detects the hole position deviation from a normal position of the holes relative to cut position by detecting the position of the holes in the immediately upstream portion of the cutting portion at the dancer roll downstream Then, a feed amount correction amount corresponding to the hole position deviation is calculated, and based on the correction amount, the feed amount of the feed device located on the downstream side of the dancer roll is set so that the hole position becomes a normal position. Integer, and the feed and processing control method of the filmstrip raw material, characterized in that cutting the film raw material by subsequent cutting device.   The dancer roll upstream feed device feeds the film raw material by a fixed amount, and the dancer roll downstream feed device sets the film raw material feed amount based on the correction amount so that the position of the hole is the normal position. The method for feeding and processing a strip-shaped film raw material according to claim 1, wherein adjustment is performed as described above. Engage the film raw material with a plurality of feeding devices installed along the feeding direction of the belt-shaped film raw material, and heat feed such as heat sealing in the middle to send it continuously or intermittently. In the feeding / processing control device for the strip-shaped film raw material, which is provided with a cutting device for cutting the raw film material into a predetermined length at the final stage of the process,
A dancer roll is provided between the feeding devices so that the feeding amount can be changed between the upstream side and the downstream side in the feeding direction, and the upstream side of the dancer roll is filled in the feeding direction and the width direction of the strip-shaped film raw material. A vertical heat seal for forming a bag and a bottom heat seal are applied so that the upper and lower films are bonded, and the vertical heat seal is formed in the feeding direction of the belt-shaped film raw material and corresponds to both sides of the filling bag part each holes for conveyance are drilled into, the hole position detector for detecting the position of the holes in the immediately upstream portion of the cutting portion at the dancer roll downstream, with respect to the detection value and the cutting position of the hole position A controller having hole position deviation calculating means for calculating a hole position deviation from the normal position of the hole and a feed amount correction amount calculating means for calculating a feed amount correction amount corresponding to the hole position deviation; A belt-shaped film raw material characterized by being configured to adjust the feed amount of the feeding device located downstream of the dancer roll based on a correction amount so that the position of the hole becomes a normal position. Feeding / processing control device.   The hole position detector is composed of a CCD camera, and the hole position deviation calculating means of the controller calculates the hole position deviation between the detected value of the hole position and the normal position of the hole position by processing the image from the CCD camera. The apparatus for feeding and processing a strip-shaped film raw material according to claim 3, wherein the apparatus is configured to do so.

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