JP5790921B2 - Bag making equipment - Google Patents

Description

  The present invention relates to a bag making apparatus for manufacturing a bag-shaped packaging container while continuously supplying a resin film material.

In recent years, packaging containers made by sealing plastic film materials with seals have been used as packaging containers for packaging various fluid contents such as sanitary products such as detergents and shampoos, and foods such as soy sauce and seasonings. It is widely used, and is also widely used as a packaging container called a refill pouch that is used by refilling the contents in other containers such as plastic bottles and glass bottles.
Such a bag-shaped packaging container, for example, as shown in Patent Document 1 below, continuously sends two upper and lower resin film materials and a resin bottom material sandwiched between both sides thereof, It is manufactured by sealing both sides in the feed direction and crossing portions with a predetermined interval extending in the width direction, and then cutting at the center in the width direction and the center of each crossing portion.
Each bag-like packaging container is formed in a bag shape with a cut at the center in the width direction as an opening at the upper end, and the opening is sealed with a seal after filling the contents from the opening Has been.

  As a bag making apparatus for continuously producing a large amount of such bag-like packaging containers, for example, as shown in Patent Document 2 below, a film material wound in a roll shape is drawn out at a predetermined speed and continuously fed. A continuous feed mechanism, an intermittent feed mechanism that intermittently feeds the film material by a predetermined amount, and a feed adjustment mechanism provided between the continuous feed mechanism and the intermittent feed mechanism (accumulators 7 and 8 in Patent Document 2) And a sealing mechanism that seals a predetermined portion of at least two upper and lower film materials fed by an intermittent feed mechanism is known.

  The feed adjusting mechanism ("accumulators 7 and 8") of the known bag making apparatus absorbs the slack of the film material due to the fluctuation of the periodic feed amount between the continuous feed and the intermittent feed, and reduces the tension fluctuation. The film material is wrapped around a movable dancer roll, and a certain tensile force is applied to the movement of the dancer roll to absorb the slack of the film material between continuous feed and intermittent feed. However, it also absorbs tension fluctuations at the same time.

Moreover, the feed amount of intermittent feed is set to the size of one bag of a bag-shaped packaging container, and it is configured to seal one place in a plurality of times by a plurality of sealing means arranged at equal intervals. At this time, since the film material is stretched by tension, it is necessary to adjust the feed amount for one bag.
For this reason, it is configured to specify a portion to be sealed by a mark attached to a printing surface applied to a resin film material, and the mark is picked up by a CCD camera to specify its position, and intermittently. The shift of the mark position during feeding is detected, and the intermittent feed amount and the interval between the plurality of sealing means are adjusted.

  Between such a continuous feed mechanism that continuously pulls out the film material wound in a roll shape at a predetermined speed, an intermittent feed mechanism that intermittently feeds the film material by a predetermined amount, and the continuous feed mechanism and the intermittent feed mechanism. In a bag-making apparatus for a bag-like packaging container having a feed adjusting mechanism provided in the bag and a sealing mechanism that seals a predetermined portion of at least two upper and lower film materials fed by an intermittent feed mechanism. In order to manufacture a high-quality bag-like packaging container, it is important to accurately set the intermittent feed position and feed amount, and to reduce tension fluctuations and film material meandering and skewing as much as possible.

JP 2007-168147 A JP 2003-33981 A Japanese Patent Application Laid-Open No. 8-217020

Since the known bag making apparatus is configured to absorb the slack of the film material due to the fluctuation of the periodic feed amount between the continuous feed and the intermittent feed by the dancer roll, the dancer roll also absorbs the tension fluctuation at the same time. Due to the influence of inertia when changing the moving direction, the effect of absorbing the tension fluctuation could not be sufficiently obtained, and on the contrary, it could cause the tension fluctuation.
It is necessary to reduce the moving speed of the dancer roll in order to keep the tension fluctuation due to the influence of inertia to a practically no problem range. Therefore, the feeding speed of the film material cannot be increased, and the improvement in productivity is hindered. It had been.

It is also possible to reduce the influence of inertia when changing the movement direction by providing multiple dancer rolls and rolling the film material multiple times. Since the influence of rotational inertia and friction on the change of the angle increases conversely, it was impossible to fundamentally solve it.
In addition, vibrations of the movable member may cause a variation in tension.

In order to alleviate these problems, as shown in Patent Document 3 above, the dancer roll for absorbing the slack of the film material is forcibly driven at a predetermined swing speed and swing width, so that the fluctuation in tension is reduced. It is known that a dancer roll for absorbing is separately provided to absorb tension fluctuation while suppressing an increase in the number of dancer rolls.
However, although the amount of movement of the dancer roll for absorbing tension fluctuations is small, the movement of the dancer roll remains unchanged, and the effect of one dancer roll is definitely increased with respect to rotational inertia and friction against changes in rotational speed. For this reason, there is a limit to speeding up the feeding of the film material even if the tension fluctuation can be somewhat improved.

On the other hand, since the tension applied to the film material appears as the elongation of the film material, the intermittent feed amount in the intermittent feed mechanism and the interval between the plurality of sealing means in the seal mechanism are set at a predetermined value corresponding to the elongation estimated at the start of manufacture. Even if the initial setting is made, the elongation of the film material also fluctuates due to fluctuations in tension during continuous production, resulting in deviation from the position to be originally sealed.
For this reason, even during continuous production, a mark attached to the printing surface is imaged by a CCD camera, the mark position is detected and monitored, and if a deviation occurs, the intermittent feed amount and the interval between the plurality of sealing means are adjusted. It takes time for this adjustment, and even if this is automatically detected and automatically adjusted, it requires a complicated configuration and it is difficult to speed up the feeding of the film material. This was an impediment to improving production efficiency.

  Furthermore, the reciprocating movement of the dancer roll and the change in the rotational speed may cause vibrations not only in the tension variation but also in the entire apparatus and the film material, and may cause the film material to flutter in the vertical direction. This vibration or fluttering is one of the causes of film skew, and the greater the fluctuation in tension or the greater the operation of the mechanism that absorbs the tension fluctuation, the greater the irregularity occurs. There was also a problem that the mechanism for correcting the line had to be complicated and large-scale.

  Therefore, the present invention is intended to solve the above-mentioned problems in the conventional bag making apparatus, prevents fluctuations in tension with a simple configuration, enables accurate initial condition setting, and monitors during continuous operation. It is an object of the present invention to provide a bag making apparatus that can reduce or eliminate the adjustment time and configuration, increase the film material feed rate, and improve production efficiency.

The invention according to claim 1 includes a continuous feed mechanism having a continuous feed roll for continuously feeding a film material, an intermittent feed mechanism having an intermittent feed roll for intermittently feeding a film material, and the continuous feed mechanism and the intermittent feed. A feed adjusting mechanism having a dancer roll capable of reciprocating rocking is provided between the mechanism, the feed adjusting mechanism comprising: a swing driving means for the dancer roll; a tension detecting roll upstream of the dancer roll; and the tension a tension sensor that detects the tension on the detection roll, have a tension control means for controlling the feed speed of the continuous feed roll in accordance with the detected value of the tension sensor, the swing drive means, a predetermined swing width And the tension control means is configured to swing the dancer roll in a reciprocating manner based on a change in a detection value of the tension sensor. As a variation of the detection value of the force sensor is reduced, by changing control the oscillating end position, it is intended to solve the above problems.

In the invention according to claim 2, in addition to the configuration of the bag making apparatus according to claim 1, the tension control means is configured such that the feed speed of the continuous feed mechanism is increased when the swinging width of the swing driving means is increased. When the swinging width of the swinging drive means is reduced, the tension detecting roll that controls to increase the continuous feed speed of the continuous feed mechanism is fixed so that it can only rotate but does not move. It is provided and the tension sensor is configured to detect a force applied to a rotation shaft of the tension detection roll, thereby solving the above-described problem.

The invention according to claim 3 includes a continuous feed mechanism having a continuous feed roll for continuously feeding a film material, an intermittent feed mechanism having an intermittent feed roll for intermittently feeding a film material, and the continuous feed mechanism and the intermittent feed. A feed adjusting mechanism having a dancer roll capable of reciprocating rocking is provided between the mechanism, the feed adjusting mechanism comprising: a swing driving means for the dancer roll; a tension detecting roll upstream of the dancer roll; and the tension A tension sensor that detects a tension applied to the detection roll; and a tension control unit that controls a feed speed of the continuous feed roll according to a detection value of the tension sensor. The feed amount adjusting means capable of adjusting the feed amount of the film and a plurality of marks provided on the surface of the film material at each position simultaneously. And an optical detection means for identification, the tension control means, said rocking drive means and / or the continuous by adding the information of the position of the feed direction of the film material of the mark which has been recognized by the optical detection means The problem is solved by controlling the feed speed of the feed roll.

In the invention according to claim 4, in addition to the configuration of the bag making apparatus according to claim 3, the optical detection means includes a plurality of two-dimensional optical elements provided above the intermittent feed mechanism at intervals in the feed direction. consists sensor, the film material by Rukoto been detectably constituting the two-dimensional position of the mark provided on the surface during the stop, it is intended to solve the above problems.

In the invention according to claim 5, in addition to the configuration of the bag making apparatus according to claim 4, the feed amount adjusting means is a position of the mark recognized by the plurality of two-dimensional optical sensors in the feed direction of the film material. depending on the information, the Rukoto is configured to determine the amount of per intermittent feed is intended to solve the above problems.

In the invention according to claim 6, in addition to the configuration of the bag making apparatus according to any one of claims 1 to 5, the tension detection roll is fixedly provided so as to be able to rotate only and not move, tension sensor, by Rukoto is configured to detect a force applied to the rotating shaft of the tension detection roll, it is to solve the above problems.

According to the seventh aspect of the present invention, in addition to the configuration of the bag making apparatus according to any one of the first to sixth aspects , the swing driving means is configured to move the dancer roll at a predetermined swing speed and swing width. The tension control means sets the feed speed of the continuous feed roll so that the detection value of the tension sensor converges to a predetermined value based on the fluctuation of the detection value of the tension sensor. the control to Rukoto solves the above problems.

According to the bag making apparatus of the first aspect of the present invention, the tension control means for controlling the feed speed of the continuous feed roll according to the detection value of the tension sensor eliminates the influence of inertia and friction. Because the tension can be adjusted, fluctuations in tension can be extremely small even when the film material is fed at high speeds, and changes in misalignment and sheet elongation are reduced during continuous operation, and monitoring and adjustment time during continuous operation is reduced. Reduce or become unnecessary.
Furthermore, since the fluctuation in tension is small, the vibration and the fluttering of the film material are reduced, so that it is possible to obtain a high-quality packaging container with no positional deviation from the printing surface by the skew feeding correcting means having a simple configuration.
And even if it speeds up the feed speed of a film material and shortens the time of a setting and adjustment, it becomes possible to manufacture a high quality packaging container at high speed, and it can improve productivity.
In addition, the timing can be automatically corrected in setting the switching timing of the swinging direction at both ends of the swinging width of the dancer roll to absorb the difference between the feed amount of the intermittent feed and the continuous feed. Therefore, it is not necessary to match the timing accurately at the start of the operation after the mold change, the idle time and the discarded material can be saved at the time of the mold change, and the productivity can be improved.
In addition, the dancer roll can be swung at an accurate timing at all times, so that fluctuations in tension can be prevented more reliably.

According to the configuration of the present invention, the detected tension is used for the automatic adjustment of the timing of intermittent feeding and swinging of the dancer roll to keep the tension constant and directly used for adjusting the feed speed of the continuous feed roll. Even when it is not possible, the feed speed of the continuous feed roll can be controlled appropriately indirectly.

According to the bag making apparatus according to the third aspect of the present invention , the tension control means for controlling the feed speed of the continuous feed roll according to the detection value of the tension sensor eliminates the influence of inertia and friction. Because tension can be adjusted, fluctuations in tension can be extremely small even when the film material is fed at high speed, and changes in positional deviation and film material elongation during continuous operation are reduced, and monitoring and adjustment time during continuous operation is reduced. Is reduced or unnecessary.
Furthermore, since vibration and film material fluttering are reduced due to small tension fluctuations, a high-quality bag-like packaging container free from positional deviation from the printing surface can be obtained by a skew feeding correcting means having a simple configuration. .
Even if the feeding speed of the film material is increased and the time for setting and adjustment is shortened, a high-quality bag-shaped packaging container can be manufactured at high speed, and productivity can be improved.
In addition, by providing optical detection means that simultaneously recognizes a plurality of marks provided on the surface of the film material at each position, it is possible to detect the pitch of one bag with a simple configuration. The setting and operation setting values can be determined easily and quickly, and the time for mold change is shortened.
In addition, even if the elongation of the film material changes during continuous operation, the tension change is suppressed by automatically correcting the recognized mark position to an appropriate position, and the position deviation from the printing surface It is possible to manufacture a high-quality bag-like packaging container without any problem.

According to the configuration of the fourth aspect of the present invention, since it is possible to detect the shift of the mark position in the feed direction and the orthogonal direction at a time, the setting operation to the initial position in the feed direction at the time of mold change and the skew Correction can be performed quickly, idle time and waste material can be saved during mold changing, and productivity can be improved.

According to the configuration of the present invention, since it is possible to detect the mark interval simultaneously with the deviation of the mark position, the setting operation to the initial position at the time of mold change and the film material feeding direction can be performed. It is possible to quickly set the feed amount according to the interval, and further, it is possible to save idle time and waste material when changing the mold, thereby improving productivity.
In addition, since the feed amount can be set accurately, it is possible to manufacture a high-quality bag-shaped packaging container that suppresses fluctuations in tension and does not have a positional deviation from the printing surface.

According to the configuration of the sixth aspect of the present invention, the number of movable parts is reduced, so that even if the operation is speeded up, the influence of inertia and friction can be reduced and the tension fluctuation can be accurately reduced.
In addition, since there are fewer moving parts, fluctuations in tension can be reduced, vibrations of the device and fluttering of the film material can be reduced, and irregular correction, meandering and skewing of the film material can be reduced for easy correction. A high-quality bag-shaped packaging container having no positional deviation from the printing surface by the mechanism can be efficiently manufactured in large quantities.

According to the configuration described in claim 7, since the dancer roll is oscillated without performing complicated control, the oscillating drive means can be simple, high in rigidity, and less in speed fluctuation and vibration. Furthermore, vibrations of the apparatus and fluttering of the film material can be reduced, and tension fluctuations caused by the swing drive means can be prevented.

The top view of the bag making apparatus which is one Example of this invention. The side view of the bag making apparatus which is one Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic operation explanatory drawing of the bag making apparatus which is one Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the feed adjustment mechanism of the bag making apparatus which is one Example of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the optical detection means of the bag making apparatus which is one Example of this invention. The front view of the intermittent feed roll of the bag making apparatus which is one Example of this invention. The top view of the intermittent feed roll of the bag making apparatus which is one Example of this invention. The side view of the intermittent feed roll of the bag making apparatus which is one Example of this invention. The front view of the sealing means of the bag making apparatus which is one Example of this invention. The top view of the sealing means of the bag making apparatus which is one Example of this invention. The side view of the sealing means of the bag making apparatus which is one Example of this invention.

  The bag making apparatus of the present invention includes a continuous feed mechanism including a continuous feed roll that continuously feeds a film material wound in a roll shape at a predetermined speed, and an intermittent feed roll that intermittently feeds the film material by a predetermined amount. An intermittent feed mechanism provided, and a feed adjustment mechanism provided between the continuous feed mechanism and the intermittent feed mechanism and provided with a dancer roll capable of reciprocating rocking.

FIG. 1 and FIG. 2 are a plan view and a side view of the entire bag making apparatus according to an embodiment of the present invention, and FIG. 3 schematically shows the schematic operation thereof.
In the bag making apparatus 100 according to an embodiment of the present invention, the film material F is continuously drawn from the raw roll R, and the continuous feed mechanism 110, the feed adjusting mechanism 160, the intermittent feed mechanism 120, and the cutting mechanism 190 are sequentially arranged. The bag-shaped packaging container is continuously manufactured while being sent.

In the continuous feed mechanism 110, the film material F is supplied as an original fabric roll R wound in a roll shape. The raw roll R is pivotally supported around a horizontal axis, and the continuous feed roll 111 is pivotally supported around a vertical axis. The film material F drawn horizontally is composed of a plurality of inclined shapes. It is wound around the guide roll group, deflected along the vertical plane, and fed to the continuous feed roll 111.
Downstream of the continuous feed roll 111, there is provided a dividing mechanism 112 that continuously divides the film material F at the center into two upper and lower film materials, and the divided upper and lower two film materials F are divided. It is deflected again along the horizontal plane by the mechanism 112 and fed to the downstream feed adjusting mechanism 160.

In the feed adjusting mechanism 160, the upper and lower two film materials F fed from the continuous feed mechanism 110 are fed through a symmetrical path with a space therebetween in the vertical direction, and the upper and lower two sheets are overlapped by the overlapping roll 166 at the most downstream side. Then, it is fed to an intermittent feed mechanism 120 described later.
As shown in FIGS. 3 and 4, a tension detecting roll 163 and a dancer roll 161 capable of reciprocating rocking are provided in symmetrical paths spaced above and below the feed adjusting mechanism 160, respectively. While absorbing the slack of the film material F by the fluctuation | variation of the periodic feed amount during intermittent feeding, it is comprised so that tension fluctuation | variation may be reduced.
The tension detection roll 163 is pivotally supported so that only the rotation is possible, and is configured to detect the tension of the film material F by detecting the force applied to the rotation axis by the tension sensor 164.
Further, in the present embodiment, the bottom material B is supplied from the front of the overlapping roll 166 and is configured to be overlapped and sandwiched between both side portions of the upper and lower two film materials F.

The intermittent feed mechanism 120 is configured to intermittently feed the upper and lower two film materials F, which are overlapped with the bottom material B interposed therebetween, by a predetermined amount by the most downstream intermittent feed roll 121.
Between the intermittent feed roll 121 of the intermittent feed mechanism 120 and the above-described superimposing roll 166, the two upper and lower film materials F, which are overlapped with the bottom material B interposed therebetween, are kept horizontal and arranged in this section. Further, both side portions and the transverse direction transverse portions with a predetermined interval are sealed by a sealing mechanism 170 having a plurality of sealing means 171.
In addition, a front two-dimensional optical sensor 141 is provided upstream of this section, and a rear two-dimensional optical sensor 142 is provided downstream, and is connected to the optical detection means 140 to simultaneously detect marks provided on the surface of the film material F. It is possible.
Further, a cutting mechanism 190 is disposed downstream of the intermittent feed roll 121, which is the most downstream of the intermittent feed mechanism 120, and is cut and separated into individual bag-like packaging containers P.
In the explanatory view shown in FIG. 3, the intermittent feed roll 121 is provided on the most downstream side of the intermittent feed mechanism 120. However, as shown in FIGS. Further, a plurality of them may be provided at an appropriate place.

In the present embodiment having the schematic configuration as described above, a continuous feed roll is provided in a section where both side portions of the upper and lower two film materials F and the crossing portions in the width direction with a predetermined interval are sealed with the bottom material B interposed therebetween. The driving speed of 111, the reciprocating swing speed / swing width / timing of the dancer roll 161, and the driving speed / timing of the intermittent feed roll 121 affect the tension of the film material F. The rate of growth also varies.
In addition, meandering or skewing of the film material F may occur due to fluctuations in tension, vibration during conveyance of the film material F, and vibration of the entire apparatus.
Therefore, in this embodiment, tension fluctuation is absorbed, the elongation rate of the film material F is specified, and the apparatus can be adjusted. The fluctuation can be reduced and the apparatus can be stably operated. The structure for correcting the skew and preventing the above-described fluctuation in the tension of the film material F, or the positional deviation of the seal due to meandering or skewing is described below.

The tension control operation in the feed adjusting mechanism 160 will be described with reference to FIG. 4 (simplified for the sake of explanation).
First, the driving speed and timing of the intermittent feed roll 121 that intermittently feeds at the pitch (described later) of the film material F under a predetermined tension detected by the optical detecting means 140 provided downstream of the feed adjusting mechanism 160 In accordance with the setting of the feed amount adjusting means 130, the reciprocating swing speed / swing width / timing of the dancer roll 161 and the driving speed of the continuous feed roll 111 are set according to the setting of the feed amount adjusting means 130. It is set in the control means 165.
The feed amount adjusting means 130 controls the intermittent feed motor 122 to drive the intermittent feed roll 121 at a driving speed and timing set.
The tension control means 165 controls the swing drive means 162 to swing the dancer roll 161 at the reciprocating swing speed, swing width, and timing, and controls the continuous feed motor 113 to set the drive. The continuous feed roll 111 is driven at a speed.

After the start of driving, the tension control means 165 receives the signal from the tension sensor 164 as an input, outputs the driving speed command of the continuous feed motor 113 as an output, increases the output signal with respect to the increase of the input signal, and reduces the input signal with Feedback control such as PID is performed so that the average value of the input signal converges to a predetermined value in the direction of decreasing the output signal. As a result, the tension can be adjusted by eliminating the influence of inertia and friction, so that the fluctuation of the tension can be made extremely small even when the film material is fed at high speed.
The tension control means 165 receives the signal from the tension sensor 164 as an input, and outputs a command for switching the swing direction at both ends of the swing width of the swing drive means 162, and outputs the maximum and minimum values of the input signal. You may perform feedback control, such as PID, so that a difference may become small. As a result, it is possible to further reduce the variation in tension caused by the difference in timing between the intermittent drive of the intermittent feed roll 121 and the swing of the dancer roll 161.
Note that the feedback control method, the constants used in the control calculations, the various settings such as the gain, etc., can control the characteristics of the entire device, the calculation speed and cost performance of the control device if the average tension value can be converged. It may be determined as appropriate in consideration.
Furthermore, information regarding the elongation of the film material F detected by the optical detection means 140 described later and the output of the tension sensor 164 may be arithmetically processed and used for feedback control. As a result, a plurality of pieces of information on the tension can be obtained, so that fluctuations in tension can be further reduced.

Next, the configuration and operation of the optical detection means 140 that simultaneously recognizes a plurality of marks provided on the surface of the film material F at respective positions will be described with reference to FIG. 5 (simplified for explanation).
The optical detection unit 140 is configured to display and calculate an image captured by the front two-dimensional optical sensor 141 and the rear two-dimensional optical sensor 142.
The front two-dimensional optical sensor 141 and the rear two-dimensional optical sensor 142 are CCD cameras, and are arranged at a distance so that the surface of the film material can be imaged in a section where the film material F is fed horizontally by the intermittent feed mechanism 120. The positional relationship with the other components of the intermittent feed mechanism 120 is set accurately.
At the start of manufacturing the bag-shaped packaging container, first, an initial position for intermittent feeding is set while imaging the surface of the film material F in a state where tension is applied by the rear two-dimensional optical sensor 142. This operation may be performed while the operator visually observes the captured image on the monitor, or the intermittent feed roll 121 may be automatically controlled based on the information detected by the optical detection means 140.
Then, the film material F in a tensioned state is stopped and simultaneously imaged by the front two-dimensional optical sensor 141 and the rear two-dimensional optical sensor 142, and the mark M is detected by the optical detection means 140 from the captured image. By specifying the position, distances Ln of a plurality of pitches (n) of the bag-like packaging container are detected, and by dividing it, the pitch L1 for one bag-like packaging container is calculated.
The calculated pitch L1 is output from the optical detection unit 140 to the feed amount adjusting unit 130 as a feed amount for one intermittent feed.
Further, the positions and intervals of a plurality of sealing means 171 described later are set according to the calculated pitch L1.
Further, since a two-dimensional image is picked up by the two-dimensional optical sensor, the position of the mark M in the width direction of the film material F can also be specified, and the optical detection means 140 can meander or skew the film material F from the position information. A line is detected, and a correction command is output to skew correction means 150 described later.

In this way, by arranging a plurality of two-dimensional optical sensors, the film material F in a state in which tension is applied under the same conditions as in actual operation can be captured once at the time of stopping, and can be equivalent to one bag-like packaging container. The pitch L1 can be detected, and the position in the width direction can be detected simultaneously.
Further, since the pitch L1 for one bag-like packaging container is calculated by dividing from the distance Ln of a plurality of pitches, it is accurately accurate with n times the resolution of the front two-dimensional optical sensor 141 and the rear two-dimensional optical sensor 142. The pitch L1 for one bag-like packaging container can be calculated, the positions and intervals of a plurality of sealing means 171 to be described later can be accurately set, test operation and inspection of the bag-like packaging container at the time of mold change No need to repeat work.
For example, when detection is performed using only one two-dimensional optical sensor having a resolution of 0.1 mm, if ten sealing means 171 are arranged, the positional deviation of the sealing means 171 at both ends is 10 mm at a maximum and 1 mm. However, if the two two-dimensional optical sensors are arranged at a position separated by 10 pitches, the positional deviation of the sealing means 171 at both ends becomes a maximum of 0.1 mm at 10 pitches, which is a sufficient allowable error range by the initial setting. It will fit.
In addition, it is also possible to calculate the position by image processing characters and designs necessary for the bag-like packaging container from the two-dimensional image, and printing of a specific mark M can be omitted.
In this embodiment, two two-dimensional optical sensors are used, but a larger number may be provided.

Next, the configuration and operation of the skew feeding correction means 150 will be described with reference to FIGS.
The skew feeding correction means 150 is configured to turn the intermittent feed roll 121 around an axis passing through the center of the film material F in the width direction and orthogonal to the film material F.
The intermittent feed roll 121 is rotatably supported by an intermittent feed roll support base 124 and is rotationally driven by an intermittent feed motor 122 fixed to the intermittent feed roll support base 124.
Further, an intermittent feed press roll 123 is provided above the intermittent feed roll 121, and is configured to intermittently feed the film material F between the intermittent feed roll 121 and the intermittent feed press roll 123.
In the present embodiment shown in the figure, a film restraining portion 126 is provided on the downstream side of the intermittent feed roll 121 on the intermittent feed roll support base 124 so that the downstream tension and the like can be adjusted. Yes.

The skew feeding correction means 150 is configured by supporting the intermittent feed roll support base 124 on a base base 154 provided on the fixed side so as to be rotatable via a rotation support shaft 151.
The rotation support shaft 151 is provided at the center in the width direction of the intermittent feed roll 121 and immediately below the rotation center axis.
A skew correction motor 152 is provided on one end side in the width direction of the base table 154, and an eccentric cam 153 rotated by the skew correction motor 152 is configured to engage with the intermittent feed roll support table 124. The intermittent feed roll support base 124 is configured to turn around the rotation support shaft 151 by rotating the skew correction motor 152 forward and backward.

The skew correction motor 152 of the skew correction unit 150 supports the intermittent feed roll necessary for correcting the shift based on the information on the shift in the width direction of the film material F detected by the optical detection unit 140 described above. The drive is controlled so that the turning angle of the table 124 becomes the same.
A plurality of mounting pieces 127 are provided on the upper surface of the base table 154, and the intermittent feed roll support table 124 is slidably mounted to support its weight.
Further, the base table 154 and the intermittent feed roll support table 124 are configured such that their positional relationship can be regulated by a fixing bolt 125. By turning the fixing bolt 125, the turning and fixing may be used properly, and the turning angle of the intermittent feed roll support base 124 is extremely small, 0.1 ° or less, so that it can be turned in an elastic range. The bolt 125 may be tightened.

With the above configuration, the skew feeding correction is performed by turning the intermittent feed roll 121, so that the film material F is skewed without applying a large lateral force even when the position is adjusted with high accuracy and the tension fluctuation is reduced. Since correction is possible, stability is improved, and continuous operation with higher accuracy and higher speed is possible.
In the embodiment shown in FIGS. 1 and 2, two intermittent feed rolls 121 are provided in the section of the intermittent feed mechanism 120, and the skew feeding correction means 150 is provided at least on the most downstream intermittent feed roll 121. Although it is good, by providing the skew feeding correction means 150 in both the intermittent feed rolls 121, it becomes possible to perform more precise skew feeding correction in the entire section of the intermittent feed mechanism 120.

Next, the configuration and operation of the seal position correcting means 180 will be described with reference to FIGS.
The plurality of sealing means 171 used in the sealing mechanism 170 in this embodiment are heat sealing means for heat-sealing the necessary portions of the film material F and the bottom material B by heat, and correspond to the pitch L of the bag-like packaging container. By the intermittent feed by the intermittent feed mechanism 120, the same portion is configured to be fused by repeating a plurality of pressure bonding by a plurality of sealing means 171 a plurality of times.
9 to 11 show one of the sealing means 171 for thermocompression bonding of the portion extending in the width direction of the film material F.
The sealing means 171 has a lower frame 173 and an upper frame 172, and a lower thermocompression bonding part 179 and an upper thermocompression bonding part 178 are provided in parallel to each other. The upper frame 172 is connected to the drive beam 177 so as to be movable in the feeding direction of the film material F, and moves up and down in the vertical direction with respect to the lower frame 173. Thereby, the lower thermocompression bonding part 179 and the upper thermocompression bonding part 178 sandwich the film material F so that thermocompression bonding is performed.

Two slide rails 174 are provided in parallel so as to extend in the feeding direction of the film material F over almost the entire section of the intermittent feed mechanism 120, and a slider 175 movable on the slide rail 174 on the lower surface side of the lower frame 173. The sealing means 171 is configured to be movable in the feeding direction of the film material F.
In addition, two rack rails 182 are provided in parallel to the slide rail 174, two pinion gears 181 meshing with the rack rail 182 on the lower side surface of the lower frame 173, and a pinion drive motor that drives the pinion gear 181. 183 is provided, and these constitute the seal position correcting means 180.
In this embodiment, the two pinion gears 181 are fixed to a seal means drive shaft 184 that is rotatably supported on the lower side surface of the lower frame 173, and one end of the seal means drive shaft 184 is connected to the pinion drive motor 183. ing.
With this configuration, the pinion drive motor 183 is driven according to the pitch L1 of one bag-like packaging container calculated by the optical detection means 140 described above, and the positions and intervals of the plurality of sealing means 171 are set.

As described above, the rack rail 182 can be firmly fixed and installed at multiple points, so that a simple structure can prevent deterioration of accuracy due to deformation, and the pinion gear 181 and the configuration for driving the pinion gear 181. Since the pinion drive motor 183, the seal means drive shaft 184 and the like can be provided exposed below the seal means, the structure of the seal means 171 is simplified, and the overall structure is lightweight while maintaining accuracy. It becomes simple and maintenance becomes easy.
In the sealing means for sealing both sides of the film material F in the feeding direction (provided in the upstream sealing mechanism 170 shown in FIGS. 1 and 2), the lower frame is connected in the width direction. The same effect can be obtained by adopting the above-described configuration for the cross member.

As mentioned above, although one Example of this invention was shown, this invention is not restricted to this, A feed adjustment mechanism has a tension | tensile_strength detection roll upstream of a dancer roll, and the tension | pulling detection means of a dancer roll, a tension sensor that detects the tension on the tension detection roll been made to have a tension control means for controlling the feeding speed of the continuous feed roll in accordance with the detected value of the tension sensor, swing drive means, predetermined The tension control means is set to swing the dancer roll by reciprocating with a swing width, and the tension control means swings the swing end so that the fluctuation of the detected value of the tension sensor is reduced based on the fluctuation of the detected value of the tension sensor. intended to change control of the position, or the intermittent feed mechanism, the an adjustable feed amount adjusting means to feed amount per one time of the intermittent feed, a plurality of marks provided on a surface of the film material at each position And an optical detection means for recognizing the film, and the tension control means feeds the swing drive means and / or the feed of the continuous feed roll in consideration of the information on the position of the mark in the feed direction of the film material recognized by the optical detection means. Any specific configuration may be used as long as it controls the speed .

  The bag making apparatus of the present invention is particularly suitable for producing a packaging container formed by making a resin film material with a seal. However, the bag making apparatus is not limited to making a bag with a seal and is continuously supplied. It can also be used in a manufacturing apparatus that performs various processing and processing with high accuracy by stabilizing tension on a sheet-like material.

DESCRIPTION OF SYMBOLS 100 ... Bag making apparatus 110 ... Continuous feed mechanism 111 ... Continuous feed roll 112 ... Dividing mechanism 113 ... Continuous feed motor 120 ... Intermittent feed mechanism 121 ... Intermittent feed roll 122 .... Intermittent feed motor 123 ... Intermittent feed press roll 124 ... Intermittent feed roll support base 125 ... Fixing bolt 126 ... Film restraint part 127 ... Placement piece 130 ... Feed amount adjusting means 140 ... Optical detection means 141 ... Front two-dimensional optical sensor 142 ... Back two-dimensional optical sensor 150 ... Skew correction means 151 ... Rotation support shaft 152 ... Skew correction motor 153 .... Eccentric cam 154 ... Base stand 160 ... Feed adjustment mechanism 161 ... Dancer roll 62 ... Swing drive means 163 ... Tension detection roll 164 ... Tension sensor 165 ... Tension control means 166 ... Superposition roll 170 ... Seal mechanism 171 ... Seal means 172 ... Upper frame 173 ... Lower frame 174 ... Slide rail 175 ... Slider 177 ... Drive beam 178 ... Upper thermocompression bonding part 179 ... Lower thermocompression bonding part 180 ... Seal position correction means 181 ... Pinion gear 182 ... Rack rail 183 ... Pinion drive motor 184 ... Sealing means drive shaft 190 ... Cutting mechanism F ... Film material M ... Mark R ... Roll stock B ... Bottom material

Claims (7)

A continuous feed mechanism having a continuous feed roll for continuously feeding film material, an intermittent feed mechanism having an intermittent feed roll for intermittently feeding film material, and reciprocating oscillation between the continuous feed mechanism and the intermittent feed mechanism A feed adjustment mechanism with a dancer roll
The feed adjustment mechanism includes a swing drive unit for the dancer roll, a tension detection roll upstream of the dancer roll, a tension sensor for detecting a tension applied to the tension detection roll, and a detection value of the tension sensor. have a tension control means for controlling the feed speed of the continuous feed roll,
The swing driving means is set to swing back and forth with a predetermined swing width to swing the dancer roll;
The bag making apparatus characterized in that the tension control means changes and controls the swing end position so that the fluctuation of the detection value of the tension sensor is reduced based on the fluctuation of the detection value of the tension sensor . The tension control means reduces the continuous feed speed of the continuous feed mechanism when the swing width of the swing drive means increases, and reduces the continuous feed speed when the swing width of the swing drive means decreases. 2. The bag making apparatus according to claim 1, wherein control is performed so as to increase a continuous feed speed of the feed mechanism.   A continuous feed mechanism having a continuous feed roll for continuously feeding film material, an intermittent feed mechanism having an intermittent feed roll for intermittently feeding film material, and reciprocating oscillation between the continuous feed mechanism and the intermittent feed mechanism A feed adjustment mechanism with a dancer roll
  The feed adjustment mechanism includes a swing drive unit for the dancer roll, a tension detection roll upstream of the dancer roll, a tension sensor for detecting a tension applied to the tension detection roll, and a detection value of the tension sensor. Tension control means for controlling the feed speed of the continuous feed roll;
  The intermittent feed mechanism includes a feed amount adjusting means capable of adjusting a feed amount per intermittent feed, and an optical detection means for simultaneously recognizing a plurality of marks provided on the surface of the film material at respective positions. Have
  The tension control means controls the feed speed of the swing drive means and / or the continuous feed roll in consideration of the position information of the mark recognized by the optical detection means in the feed direction of the film material. A bag making apparatus. The optical detection means comprises a plurality of two-dimensional optical sensors provided at intervals in the feed direction above the intermittent feed mechanism, and the two-dimensional position of a mark provided on the surface when the film material is stopped. It is comprised so that detection is possible, The bag making apparatus of Claim 3 characterized by the above-mentioned. The feed amount adjusting means is configured to determine the amount of intermittent feed per time according to information on the position of the mark recognized by the plurality of two-dimensional optical sensors in the feed direction of the film material. The bag making apparatus according to claim 4 . The tension detection roll is fixedly provided so that it can only rotate and does not move,
The bag making apparatus according to any one of claims 1 to 5, wherein the tension sensor is configured to detect a force applied to a rotation shaft of the tension detection roll. The swing driving means is set to reciprocally swing the dancer roll at a predetermined swing speed and swing width;
The tension control means, based on the variation of the detection value of the tension sensor, claim a detection value of the tension sensor to converge to the vicinity of a predetermined value, characterized by controlling the feeding speed of the continuous feed roll The bag making apparatus according to any one of claims 1 to 6 .