JP4390918B2 - Packaging material feeding device for automatic packaging machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of an automatic packaging machine that automatically seals and seals various materials to be packaged such as powder and liquid using a heat sealer. The present invention relates to a packaging material feeding device for an automatic packaging machine capable of smoothly feeding a packaging material (wrapping film).
[0002]
[Prior art]
For example, as in the automatic packaging machine described in Japanese Utility Model Publication No. 58-34002, the left and right horizontal heat sealers move downward by one pack while performing horizontal sealing to draw out the packaging material (packaging film). The type of automatic packaging machine includes a packaging material feeding machine that intermittently feeds the packaging material in synchronization with the downward movement of the horizontal heat sealer between the reel around which the packaging material is wound and the automatic packaging machine ( (Feeding roller) is provided, and is structured to smoothly draw out the packaging material by the transverse heat sealer.
[0003]
However, in the case of the conventional apparatus using the packaging material feeding machine, a troublesome adjustment work is required to match the drawing timing of the horizontal heat sealer and the feeding timing of the feeding machine. Troubles have occurred that meander loosely and meander or the packaging material stretches and cuts in time for the packaging material not being delivered.
[0004]
Therefore, the present applicant takes up the packaging material against the intermittent withdrawal of the packaging material by the transverse heat sealer, as seen in the application of Japanese Patent Application No. 8-3221037 (Japanese Patent Laid-Open No. 10-147461). We have developed a packaging material feeding device for automatic packaging machines that is devised so that troubles such as meandering and cutting of the packaging material do not occur by continuously feeding from the roll side with a constant tension.
[0005]
According to the above-mentioned feeding device, since the feeding machine continuously feeds the packaging material from the reel with respect to the intermittent drawing of the packaging material by the horizontal heat sealer on the automatic packaging machine side, the drawing timing of the horizontal heat sealer and the feeding machine There is no need to perform the troublesome adjustment work to match the feeding timing, and when the pulling amount on the automatic packaging machine side exceeds the feeding amount on the feeding machine side and the tension of the packaging material increases, the packaging material is pressed against the packaging material. When the dancer roller for feeding rises and adjusts the feeding speed of the feeding machine faster, on the contrary, when the feeding amount on the feeding machine side is larger than the drawing amount on the automatic packaging machine side and the tension of the packaging material is lowered, the dancer roller In order to slow down and adjust the feeding speed of the feeder, the tension of the packaging material is always kept constant with respect to the intermittent withdrawal on the automatic packaging machine side, and it is said to meander and cut the packaging material. It is possible to prevent trouble from occurring.
[0006]
[Problems to be solved by the invention]
However, even when the above-described feeding device is used, when the feeding machine that has been continuously operated stops feeding the packaging material, the reel around which the packaging material is wound may not stop immediately due to inertia, and as a result, the feeding machine There is a problem that the tension of the packaging material between the reel and the reel is loosened, meandering, and a strong tension (load) is applied to the packaging material at the start of pulling out the packaging material from the reel where the feeder is stationary. There was a problem that it was stretched or cut.
[0007]
In addition, in recent automatic packaging machines, large-diameter packaging materials are installed for a long period of time for rationalization and cost reduction. Since the starting and stopping of the wrapping material will be further delayed, the problem of the meandering and cutting of the wrapping material is further promoted, and the mounting and operation of the large-diameter wrapping material are hindered.
[0008]
Also, as a means to prevent over-rotation by applying a brake to the packaging material, an arm-type with a mechanism that elastically presses a roller attached to the tip of the arm on the peripheral surface of the packaging material wound around a reel. However, this arm type brake device needs to make the arm longer as the diameter of the packaging material increases, and further, against the peripheral surface of the packaging material that gradually becomes smaller diameter by using the roller at the tip However, since they must always be pressed at the same angle, there is a problem that the structure is complicated and unsuitable for large-diameter packaging materials, and the brake accuracy is low.
[0009]
Therefore, the technical problem of the present invention is for an automatic packaging machine configured such that the feeding machine continuously feeds the packaging material from the reel side with respect to the intermittent drawing of the packaging material by the horizontal heat sealer on the automatic packaging machine side. In the packaging material feeding device, when using a large-diameter and heavy packaging material, it automatically absorbs the delay in starting and stopping the large-diameter packaging material that occurs at the start and stop of the feeder, and The brake pressure for the packaging material is also automatically adjusted to prevent various troubles such as cutting and meandering of the packaging material.
[0010]
[Means for Solving the Problems]
In order to solve the above technical problem, a packaging material feeding device for an automatic packaging machine according to claim 1 of the present invention is an automatic packaging machine that performs seal packaging while intermittently withdrawing the packaging material wound on a reel. In the attached packaging material feeding device, the packaging material feeding device includes a feeding machine that continuously draws the packaging material wound on a reel, and a packaging material surface that is stretched between the automatic packaging machine and the feeding machine. A feeding dancer roller that presses and turns freely, a one-way clutch device that prevents the packaging material from reversing due to the tension of the feeding dancer roller, and a packaging material surface that is stretched between the feeding machine and the reel. A start / stop absorbing dancer roller that is movably pressed, a packaging brake that applies a brake to the rotation of the reel, and a controller that controls the packaging material feeding device. Dancer roller angle determination means for detecting the angle of the sensor roller with an angle detector and indexing the rotation angle from the steady position, and rotation of the packaging material feeding motor of the feeder based on the rotation angle indexed by the determination means Packaging material feeding motor control means for calculating the speed of the packaging material feeding motor by increasing or decreasing the speed, packaging material diameter measuring means for measuring the diameter of the packaging material wound on the reel, and this packaging material diameter measuring means Packaging material brake means for increasing or decreasing the brake pressure based on the detected diameter of the packaging material, the dancer roller angle determining means, the packaging material feeding motor control means, the packaging material diameter measuring means, and the packaging material measuring means. The material brake means comprises a control program stored in the memory of the controller, and the control program is a rotation angle of the feeding dancer roller indexed by the dancer roller angle determination means. If is large, adjusted to be faster the rotational speed of the packaging material feed motor calculated by the packaging material feed motor control means, the rotation angle of the feeding for the dancer rollers indexed by the dancer roller angle judging means If smaller, adjust the rotation speed of the packaging material delivery motor calculated by the packaging material delivery motor control means so as to slow down the dancer roller angle determination means and the packaging material until the delivery dancer roller returns to the steady position. By repeating the feeding motor control means, the drawing amount of the packaging material by the automatic packaging machine and the feeding amount of the packaging material by the feeding machine are matched to keep the drawing tension of the automatic packaging machine constant, and the packaging material diameter measuring means If the diameter of the packaging material detected by the above is large, increase the brake pressure of the packaging material brake calculated by the packaging material brake means and measure the packaging material diameter. When the diameter of the packaging material detected by the means is small, the brake pressure of the calculated packaging material brake is weakened by the packaging material brake means, and the strength of the reel load accompanying the delivery of the packaging material is adjusted to be constant. In addition, when the feeding machine starts, the start / stop absorbing dancer roller rises to absorb the change in tension applied to the packaging material fed from the reel, and when the feeding machine stops, the start / stop absorbing dancer The present invention is characterized in that a change in tension applied to the packaging material fed from the reel by lowering the roller is absorbed to keep the feeding tension of the feeding machine constant.
[0011]
According to the above means, feeding a dancer roller provided between the unwinder and automatic packaging machine, keeping always constant the tension of the packaging material against intermittent withdrawal of automatic packaging machine, the time of starting In addition, it prevents the occurrence of troubles such as meandering and cutting of the packaging material that occurs between the feeder and the automatic packaging machine at the time of stoppage, while starting and stopping provided between the feeder and the reel around which the packaging material is wound. The absorbing dancer roller rises to absorb the tension when a heavy load is applied to the packaging material, and on the contrary, it descends when the packaging material tension is loosened due to excessive rotation of the reel. Since the loosening of the packaging material can be absorbed, the use of a large-diameter packaging material prevents the occurrence of troubles such as cutting and meandering of the packaging material that occurs between the reel and the feeder at the start and stop. enable
[0012]
Further, according to the above means, when the diameter of the packaging material wound on the reel is large and heavy, that is, when excessive rotation due to inertia is large, the sensor measures the diameter of the packaging material to increase the brake pressure, When the diameter of the packaging material becomes smaller and lighter, the sensor detects this and adjusts the brake pressure gradually. Therefore, the inertia and load strength (magnitude) due to the size of the packaging material are kept constant. By adjusting, it is possible to always control the start, rotation, and stop operations of the reels regardless of the size of the packaging material.
[0013]
Since it is as mentioned above, the technical problem mentioned above can be solved by the above-mentioned means, and the problem of the above-mentioned conventional technology can be solved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of a packaging material feeding device for an automatic packaging machine according to the present invention will be described below in detail with reference to the accompanying drawings.
[0015]
FIG. 1 illustrates the configuration of a packaging material feeding device for an automatic packaging machine according to the present invention. In the figure, T is a lateral sealer on the left and right as described in, for example, Japanese Utility Model Publication No. 58-34002. The packaging material F is pulled out from the reel FR side by one pack while the packaging material is horizontally sealed from both sides, i.e., moved downward by one pack while being held. An automatic packaging machine having a general structure, 7 is a feeding machine that draws the packaging material F from the reel FR and continuously supplies it to the automatic packaging machine T side, 8 is a one-way clutch device for preventing reverse rotation, and 14 is a single packaging. A slitter device for slitting the material F into a plurality of strip-like films FT for the multiple automatic wrapping machine T. The feeder 7, the one-way clutch device 8, and the slitter device 14 With a wound reel FR It is provided in a sequence shown between dynamic packaging machine T.
[0016]
Similarly, in FIG. 1, 7R and 7R are feeding rollers of the feeding machine 7 continuously rotated by the packaging material feeding motor 7M, and 8R and 8R are one-way clutches for preventing reverse rotation that prevent the packaging material F from being pulled back. The feed rollers 14K and 14R of the one-way clutch device 8 provided with a not-shown) are slitters and receiving rollers of the slitter device 14 rotated by the slitter driving motor 14M. The packaging material F drawn from the reel FR is: As shown in the drawing, the mechanism is supplied to the automatic packaging machine T side through the feeding machine 7 → one-way clutch device 8 → slitter device 14.
[0017]
Further, in FIG. 1, 9A is a rotating arm that pivotally supports the root end portion 9B side on an automatic packaging machine T side frame or the like, and 9 is rotatable at the tip of the rotating arm 9A. The attached dancer roller 10 is an angle detector such as a rotary encoder for detecting a change in the angle of the turning arm 9A in the vertical direction, that is, a change in the angle of the dancer roller 9 in the vertical direction. 9 is pressed against the upper surface of the packaging material F that is passing between the feeding machine 7 and the one-way clutch device 8 described above, and the packaging material F is generally V-shaped by its weight as shown in the figure. So that tension is applied.
[0018]
The dancer roller 9 rises when the amount of the packaging material F drawn out by the automatic packaging machine T is larger than the amount of feeding out by the feeding machine 7 and the tension of the packaging material F becomes high. The T-side packaging material F is configured to be lowered when the amount of the packaging material F drawn becomes smaller than the feeding amount by the feeding machine 7 and the tension of the packaging material F becomes low.
[0019]
Also, a dancer detected by the angle detector 10 is disposed between the angle detector 10 that detects a change in the angle of the rotating arm 9A (dancer roller 9) and the packaging material feeding motor 7M of the feeding machine 7. The rotation angle from the steady position (position where the feeding roller 7R stops) is calculated from the angle of the roller 9, and when the rotation angle is large, the rotation of the motor 7M is accelerated to adjust the feeding speed faster, and on the contrary, it is small. In such a case, a controller (control means) that slows down the rotation of the motor 7M and adjusts the feeding speed is incorporated, and the tension of the packaging material F is always kept constant by adjusting the motor 7M. ing.
[0020]
Next, 3A is a rotating arm that pivotally supports the root end 3B side on the above-described automatic packaging machine T side frame and the like, and 3 is rotatably attached to the tip of the rotating arm 3A. This is a dancer roller for absorbing start / stop, and this dancer roller 3 is pressed against the upper surface of the packaging material F that is passing between the reel FR and the feeder 7, and it always depends on its weight as shown in the figure. Tension is applied so that the packaging material F is substantially V-shaped.
[0021]
Further, in the figure, 4, 5, 6, 11, 12, 13, 15 are rollers for passing the packaging material F and FT..., And the packaging material F drawn from the reel FR is passed to these rollers 4-15. Thus, the mechanism is sequentially supplied to the automatic packaging machine T side.
[0022]
Further, in FIG. 1, reference numeral 1 denotes a packaging material diameter measuring sensor for measuring the diameter (amount) of the packaging material F wound around the reel FR using ultrasonic waves, etc., 1T is a mounting base thereof, and 2 is the reel FR described above. Or, a brake for packaging material that applies a brake to the rotation of the packaging material F wound around the reel FR, and the brake 2 increases the brake pressure when the diameter of the packaging material F is large from the measurement result of the sensor 1 ( The mechanism is such that the brake pressure is gradually lowered (weakened) as the diameter decreases.
[0023]
FIG. 2 is a block diagram for explaining the electrical configuration of a control unit (controller) for controlling the packaging material feeding device for an automatic packaging machine according to the present invention, and includes a CPU 20, a memory 21 comprising a ROM and a RAM, The interface circuit 23 connected via the bus 22 is connected to the packaging material diameter measuring sensor 1 and the packaging material brake 2, and the angle detector 10 for the packaging material feeding motor 7M and the feeding dancer roller 9; The slitter drive motor 14M and the display, keyboard, cylinder, motor, etc. of the automatic packaging machine T are connected to each other, and each of them is controlled according to the system program stored in the memory 21.
[0024]
Since the packaging material feeding device for an automatic packaging machine according to the present invention is configured as described above, first, the packaging material feeding motor 7M and the automatic packaging machine T start automatic packaging at the same time as the power is turned on. Each of the slitter driving motors 14M starts rotating, and the slitting device 14K of the slitter device 14 slits the packaging material F drawn from the reel FR into a plurality of strip-like films FT, and sends them to the automatic packaging machine T side.
[0025]
In addition, when the automatic packaging machine T is a multiple automatic packaging machine that automatically wraps a plurality of packaging products at the same time by one seal packaging, the slitter device 14 is used to form the packaging material F into a plurality of strips. In the case of a normal type automatic packaging machine that slits but automatically wraps one packaged product with a single sealing operation, the packaging material F is directly fed from the one-way clutch device 8 without using the slitter device 14 described above. It is configured to feed to the automatic packaging machine T side.
[0026]
When the packaging material F is being supplied, the angle detector 10 detects the angle of the dancer roller 9 (detects the angle of the rotating arm 9A), and as a result, is determined to be a steady position (steady angle). The operation is continued as it is, and this continuous operation is continued until the power source is turned off.
[0027]
On the other hand, when it is determined that the angle of the dancer roller 9 is not the steady position, the rotation angle from the steady position is determined, and the rotational speed of the packaging material feeding motor 7M of the feeder 7 is determined based on the rotation angle. Is calculated to increase or decrease the rotational speed of the motor 7M.
[0028]
The speed increase or deceleration control of the packaging material feeding motor 7M described above is repeated until the dancer roller 9 returns to the steady position. As a result, the amount of the packaging material F drawn by the automatic packaging machine T and the feeding machine 7 The tension of the packaging material F between the feeding machine 7 and the automatic packaging machine T can be kept constant by making the feeding amount of the packaging material coincide.
[0029]
When the packaging material feeder 7 draws the packaging material F from the reel FR, first, when starting the reel FR to start rotating from a stationary state, a starter / stop absorbing dancer roller is applied by the tension applied to the packaging material F. Since 3 rises and absorbs the load applied to the packaging material F, it is possible to prevent a cutting accident of the packaging material F at the time of start-up, and to smoothly perform the packaging material F having a large diameter and a heavy weight. Start rotation can be performed.
[0030]
On the other hand, when stopping the feeding operation of the packaging material F by the packaging material feeding machine 7, the start / stop absorbing dancer roller 3 descends and absorbs the excessive feeding amount of the packaging material F due to inertial rotation (too much rotation) of the reel FR. For this reason, problems such as meandering and sag of the packaging material F that occur when the feeding of the packaging material F is stopped can be solved.
[0031]
Further, when the diameter of the packaging material F wound around the reel FR is large (heavy), the brake pressure of the packaging material brake 2 is increased (intensified) according to the detection of the sensor 1 to control unnecessary inertial rotation of the reel FR. On the other hand, when the diameter of the packaging material F wound around the reel FR becomes small, the brake pressure of the packaging material brake 2 is gradually lowered (weakened), and the packaging material F becomes a small diameter and the load is increased. It is devised so that the rotation of the FR can be smoothly performed with a small force.
[0032]
FIG. 3 is a block diagram clearly illustrating the overall configuration of the packaging material feeding device for an automatic packaging machine according to the present invention. The dancer roller angle judging means, the packaging material feeding motor control means, the packaging material diameter judging means and the packaging material delivery device. The material brake control means is a control program stored in the memory 21 described above.
[0033]
【The invention's effect】
As described above, according to the packaging material feeding device for an automatic packaging machine according to the present invention, the tension of the packaging material fed from the reel side and drawn into the automatic packaging machine side is set between the reel and the packaging material feeding machine. And since it can always be adjusted to be constant between both the packaging material feeding machine and the automatic packaging machine, the packaging material does not meander or cut during automatic packaging, and automatic packaging by an automatic packaging machine. In addition to this, since the brake pressure for the reel is adjusted according to the diameter (amount) of the wrapped packaging material, the packaging material generated when starting and stopping the packaging material feeding is adjusted. Since problems such as cutting and meandering can be solved more reliably, it is possible to use large-diameter packaging materials. As a result, continuous packaging operation can be performed for a long time without replacement of packaging materials, reducing costs. Can be achieved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a packaging material feeding device for an automatic packaging machine according to the present invention.
FIG. 2 is a block diagram illustrating an electrical configuration of the present invention.
FIG. 3 is a block diagram clearly illustrating the overall configuration of a packaging material feeding device for an automatic packaging machine according to the present invention.
[Explanation of symbols]
T automatic packaging machine FR reel wrapped with packaging material F packaging material 1 packaging material diameter measurement sensor 2 packaging material brake 3 start / stop absorbing dancer roller 7 feeding machine 7M feeding motor 9 feeding dancer roller 9A rotating arm 10 Angle detector
20 CPU
21 Memory (dancer roller angle determination means, packaging material feeding motor control means, packaging material diameter determination means, packaging material brake control means )

Claims (1)

In a packaging material feeding device attached to an automatic packaging machine that performs seal packaging while intermittently withdrawing the packaging material wound on a reel,
The packaging material feeding device comprises:
A feeding machine that continuously draws out the packaging material wound on the reel, a feeding dancer roller that presses and turns a packaging material surface that is stretched between the automatic packaging machine and the feeding machine, and a feeding dancer One-way clutch device that prevents reversal of packaging material due to roller tension, start / stop absorption dancer roller that presses the packaging material surface that is stretched between the feeder and the reel, and the rotation of the reel A brake for packaging material for applying a brake to the controller, and a controller for controlling the packaging material feeding device,
The controller is
Dancer roller angle determination means for detecting the angle of the dancer roller for feeding with an angle detector and indexing the rotation angle from the normal position, and for feeding the packaging material of the feeder based on the rotation angle indexed by the determination means Wrapping material feeding motor control means for calculating the rotational speed of the motor to speed up or decelerate the wrapping material feeding motor, wrapping material diameter measuring means for measuring the diameter of the wrapping material wound on the reel, and the wrapping material And a packaging material brake means for increasing or decreasing the brake pressure based on the diameter of the packaging material detected by the diameter measuring means,
The dancer roller angle determining means, the packaging material feeding motor control means, the packaging material diameter measuring means, and the packaging material brake means are constituted by a control program stored in the memory of the controller,
The control program is
When the rotation angle of the feeding dancer roller indexed by the dancer roller angle determining means is large, the rotational speed of the packaging material feeding motor calculated by the packaging material feeding motor control means is adjusted to be faster,
When the rotation angle of the feeding dancer roller indexed by the dancer roller angle determining means is small, the rotational speed of the packaging material feeding motor calculated by the packaging material feeding motor control means is adjusted to be slow, The dancer roller angle determination means and the packaging material feeding motor control means are repeatedly performed until the feeding dancer roller returns to the steady position,
Match the pull-out amount of the packaging material by the automatic packaging machine with the feed-out amount of the packaging material by the feeding machine so as to keep the pulling tension of the automatic packaging machine constant,
When the diameter of the packaging material detected by the packaging material diameter measuring means is large, increase the brake pressure of the packaging material brake calculated by the packaging material brake means,
When the packaging material diameter detected by the packaging material diameter measuring means is small, the packaging material brake means weakens the calculated brake pressure of the packaging material brake and increases or decreases the reel load accompanying the delivery of the packaging material. Is adjusted to a certain level,
When the feeder starts, the start / stop absorbing dancer roller rises to absorb the change in tension applied to the packaging material fed from the reel,
When the feeding machine stops, the start / stop absorbing dancer roller descends to absorb the change in tension applied to the packaging material fed from the reel, so that the feeding tension of the feeding machine is kept constant. A packaging material feeding device for automatic packaging machines.

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