JP2520042Y2 - Stacker position control device for laminates in packaging machines - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate sealer position control device for a packaging machine.

[0002]

2. Description of the Related Art In a packaging machine that handles laminated materials such as newspapers,
After this laminate is compressed to a predetermined packaging height by a press etc., it is wrapped with a film, etc., and then the sealing process to weld the mating surface of this film and cutting the center of this sealing part in the sealing direction. Then, the packaging is completed, and a cutting process for forming and separating the front seal portion of the film to be covered on the subsequent laminate is performed.

The height of the sealing portion of this film is preferably set at a position 1/2 of the packaging height of the laminate in order to effectively utilize the film width, and the height of the sealing portion is automatically adjusted. Many means for setting are provided. Among these prior arts, in order to track the operation of the sealing device with the operation of the compression device for compressing the laminate to the packaging height, for example, those devices are linked by a roller chain or the like (for example, a special device). (See Japanese Patent Publication No. 2-27209), a driving rack that interlocks with the compression device, and a driven rack that interlocks with the sealing device, and the amount of movement of the driven rack is set to 1/2 of the amount of movement of the driving rack. It is well known that the seal portion of the laminated film compressed to the packaging height by the compression device is set to an appropriate height (see, for example, Japanese Utility Model Publication No. 62-40890).

[0004]

However, each of the above-mentioned conventional sealing devices has a drawback that the structure is complicated, the equipment cost is high, and the maintenance cost is also high, and the sealing device is a high-speed type. In such a case, the action of the upper sealer and the lower sealer to engage with each other is weak, so that there is a problem that the film is not sufficiently welded at the seal portion.

According to this invention, in view of such conventional circumstances, the seal portion of the film in which the laminate is packaged is formed at a seal height position which is ½ of the package height with a simple structure. At the same time, it is an object of the present invention to provide a sealer position control device for a laminate in a packaging machine in which the welding process of the seal portion can be surely performed at high speed.

[0006]

According to a sealer position control device for a laminate in a packaging machine of the present invention, a first compression device and a second compression device for compressing a conveyed laminate are arranged in parallel, and A sealing device for sealing the compressed laminate is arranged between the first compression device and the second compression device, and the upper conveyor is a lower conveyor in the first compression device and the second compression device. In a packaging machine in which the sealing device is provided so as to be able to move up and down with respect to each other, an upper sealer and a lower sealer are provided so as to be capable of coming into contact with each other, and the upper side when the compression of the laminate is completed by the first compression device. A descent amount detection means for detecting a descent amount of the conveyor and outputting a descent amount detection signal, and a descent amount of the upper sealer and a lower sealer based on the descent amount detection signal output from the descent amount detection means. A sealer position control means for calculating the amount of rise and outputting an upper sealer position command signal and a lower sealer position command signal, and lowering the upper sealer to a predetermined position based on the upper sealer position command signal output from this sealer position control means. It comprises upper sealer driving means and lower sealer driving means for raising the lower sealer to a predetermined position based on the lower sealer position command signal output from the sealer position control means.

[0007]

When the upper conveyor of the first compressing device reaches the position for compressing the laminate to the packaging height, the compressive force in this case is detected as an electric signal, and this electric signal is processed by the central processing unit to By stopping the driving means of the compression device, it is confirmed that the laminate is compressed to the packaging height.

The sealing device which receives the electric signal based on the packaging height is such that when the upper sealer and the lower sealer come close to each other and the joining position reaches the sealing height which is ½ of the packaging height, the lower sealer. The central processing unit processes the rising amount detection signal for detecting the rising amount of the upper sealer while the lower sealer driving means is stopped, while the lowering amount detection signal for detecting the lowering amount of the upper sealer is processed by the central processing unit and drives the upper sealer. The stopping of the means confirms that the sealing height of the packaging film has been adapted to a position of 1/2 of the packaging height.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In a packaging machine 21 shown in FIG. 2, a first compression device 22 and a second compression device 23 for compressing a conveyed laminated product W such as newspapers to a predetermined packaging height H1 are arranged in parallel. Between the first compression device 22 and the second compression device 23, a sealing device 24 that performs, for example, a vertical seal S of the compressed laminate W is arranged.

The first compression device 22 includes an upper conveyor 2
5 is provided to be movable up and down with respect to the lower conveyor 26 by the compression device elevating means 27, and the second compression device 23 is
The upper conveyor 28 is provided so as to be movable up and down with respect to the lower conveyor 29 by a known lifting means (not shown).

The sealing device 24 is provided such that the upper sealer 30 and the lower sealer 31 face each other with their axes aligned with each other at an upper position and a lower position sandwiching the conveying path P of the laminate W.

The upper sealer 30 is a sealer holder 30.
a is provided so as to be able to move up and down with respect to the transport path P by the upper sealer lifting means 32, and the lower sealer 31 is
The sealer holder 31a is provided so as to be movable up and down with respect to the conveyance path P by the lower sealer lifting means 33, and the sealing device 24 is provided with the sealer position control device 1 shown in FIG.

The sealer position control device 1 is configured so that when the laminate W is compressed to a predetermined packaging height H1 by the compression force control device 11 provided on the upper conveyor 25 of the first compression device 22, the compression force control device 1 is operated. The vertical compression portion S of the laminate W is formed at the seal position H2 which is ½ of the packaging height H1 based on the signal output from the package 11, and the laminate W is packaged by the first compression device 22. A drop amount detecting means 2 for detecting a drop amount of the upper conveyor 25 and outputting a drop amount detection signal D when the compression to the height H1 is completed, and a drop amount detecting signal output from the drop amount detecting means 2. Based on D, the amount of lowering of the upper sealer 30 and the lower sealer 31
Of the upper sealer position command signal E and the lower sealer position command signal F, and the upper sealer position command signal E output from the sealer position control unit 3 An upper sealer drive means 6 such as a servo motor for lowering the sealer 30 to a predetermined position, and a lower sealer drive means for raising the lower sealer 31 to a predetermined position based on the lower sealer position command signal F output from the sealer position control means 3. When the means 9 and the upper sealer 30 have moved a predetermined amount of drop based on the upper sealer position command signal E, the upper sealer drop amount detection signal G is output and the current supplied to the upper sealer drive means 6 is changed to the sealer position. Where the upper sealer descent amount detecting means 4 for shutting off via the control means 3 and the lower sealer 31 are based on the lower sealer position command signal F. A lower sealer rising amount detecting means 7 which detects a lower sealer rising amount detection signal H when the rising amount is moved and shuts off the current supplied to the lower sealer driving means 9 through the sealer position control means 3; An upper sealer main controller 5 such as a servo amplifier interposed between the sealer position control means 3 and the upper sealer drive means 6, and a servo interposed between the sealer position control means 3 and the lower sealer drive means 9. It consists of a lower sealer main controller 8 such as an amplifier.

In the compression force control device 11, the compression device elevating means 27, the compression device driving means 12 such as a servomotor for driving the compression device elevating means 27, and the compression speed of the compression device elevating means 27 are predetermined speeds. When, the compression speed detection means 13 such as an encoder that outputs the compression speed detection signal A, and the limiting current value set internally based on the compression speed detection signal A output from the compression speed detection means 13 The compressor current value detecting means 14 for comparing the supply current value supplied to the compressor driving means 12 and outputting the current limit value detection signal B when the supply current value reaches the limit current value, Based on the current limit value detection signal B output from the compressor current value detection means 14, a current cutoff signal C is output to cut off the current supplied to the compressor drive means 12. A device current cutoff means 15, a current limit value adjuster 16 connected to the compression device current value detection means 14, a servo amplifier interposed between the compression device drive means 12 and the compression device current cutoff means 15, etc. And the main controller 17 of the compressor.

The current limit value regulator 16 is for setting the compression strength corresponding to the size of the laminate W and inputting it to the compressor current value detecting means 14, and at least one variable resistor is provided. It is applied, and the current limit value corresponding to the desired compression force can be set.

The output signal from the compression speed detection means 13 to the drop amount detection means 2 may be the compression speed detection signal A, and is a rotation speed detection signal indicating the rotation speed or the like of the compression device driving means 12 if necessary. May be.

The descending amount detecting means 2, the sealer position controlling means 3, the upper sealer descending amount detecting means 4, the lower sealer rising amount detecting means 7, the compression speed detecting means 13, the compressor current value detecting means 14, the compression. Device current interruption means 15
Are configured to include software operating on the central processing units 18a and 18b, respectively.

Next, the operation of the above embodiment will be described.

When the laminate W conveyed to the first compressing device 22 enters the compression position on the lower conveyor 26, this entering operation is detected, and the compressing operation and the sealing operation of the laminate W shown in FIG. 3 are performed. Done.

First, in step S1, the compressor main controller 1
It is determined whether or not the compression command signal by 7 is input. If yes, the compression operation of the laminate W is started in step S2.

During the compression operation, when the compression speed of the upper conveyor 25 is reduced by the compression resistance of the laminate W, the compression speed detecting means 13 determines in step S3 whether or not the compression speed has reached the predetermined speed. It If YES, the compression speed detection signal A is output in step S4, and the detection operation of the compressor current value detection means 14 is started in step S5 based on the compression speed detection signal A.

While the compression operation is in progress, in step S6, the compressor current value detection means 14 determines whether the supply current value has reached the limit current value. Then, when the supply current value detected by the compressor current value detection means 14 reaches the limit current value adjusted by the current limit value adjuster 16, a process of outputting the current limit value detection signal B is performed in step S7. Step S8 based on the current limit value detection signal B
Then, the current interruption signal C is outputted from the compressor current interruption means 15.

Then, in step S9, the current cutoff signal C from the compressor current cutoff means 15 is input to the compression device drive means 12 via the compression device main controller 17, so that the upper conveyor 28 together with the compression device elevating means 27. Stops and the compression operation of compressing the laminate W to the packaging height H1 is completed.

Immediately after the completion of this compression operation, the current interruption signal C from the compressor current interruption means 15 and the drop amount detection means 2 are detected.
The sealer position control means 3 outputs an upper sealer position command signal E and a lower sealer position command signal F on the basis of the descent amount detection signal D from the upper sealer position command signal E in step S10. Lifting means 3
At the same time when the lowering operation of No. 2 is started, the ascending operation of the lower sealer elevating means 33 is started based on the lower sealer position command signal F in step S11.

When the lowering operation of the upper sealer elevating means 32 progresses and the lowering amount of the upper sealer 30 detected by the upper sealer lowering amount detecting means 4 becomes the lowering amount to a predetermined position according to the upper sealer position command signal E. , A process of outputting the upper sealer fall amount detection signal G is performed in step S12, and based on the upper sealer fall amount detection signal G, step S1
At 4 the current supplied to the upper sealer drive means 6 is cut off via the sealer position control means 3 so that the upper sealer 30 is a seal which is half the packaging height H1 of the laminate W. It is fitted above the position H2.

On the other hand, the raising operation of the lower sealer lifting means 33 progresses, and the raising amount of the lower sealer 31 detected by the lower sealer raising amount detecting means 7 becomes the raising amount to a predetermined position by the lower sealer position command signal F. When step S13
In step S15, the current supplied to the lower sealer drive means 9 is cut off via the sealer position control means 3 based on the lower sealer rise detection signal H. As a result, the lower sealer 31 is fitted below the sealing position H2.

[0028]

EFFECT OF THE INVENTION The stacker position control device for a laminate in the packaging machine of the present invention detects the amount of descent of the upper conveyor when the compression of the laminate is completed by the first compression device and outputs a descent detection signal. Based on the descent amount detecting means and the descent amount detection signal output from the descent amount detecting means, the descent amount of the upper sealer and the ascending amount of the lower sealer are calculated to obtain an upper sealer position command signal and a lower sealer position command signal. Based on the output sealer position control means and the upper sealer position command signal output from this sealer position control means,
An upper sealer drive means for lowering the upper sealer to a predetermined position, and a lower sealer drive means for raising the lower sealer to a predetermined position based on a lower sealer position command signal output from the sealer position control means. Therefore, the sealing position of the laminate is always formed at the packaging height position.

Therefore, the film width can be effectively used and the width of the lateral seal can be saved.

Further, since the seal portion is not likely to be formed on the upper side of the laminate, misreading of the bar code on the address paper is eliminated, and it is necessary to change the compression force depending on the type, thickness and width of the packaging film. Can be easily dealt with.

Further, since the sealing device does not use air pressure or the like as in the conventional case, it has an excellent advantage that the working environment is clean and the speed can be increased by an electric system.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a laminate sealer position control device in a packaging machine.

FIG. 2 is a schematic view of a main part of a packaging machine.

FIG. 3 is a flowchart illustrating a control operation of the sealer position control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealer position control device 2 Falling amount detection means 3 Sealer position control means 6 Upper sealer drive means 9 Lower sealer drive means 21 Packaging machine 22 First compression device 23 Second compression device 24 Sealing device 25, 28 Upper conveyor 26, 29 Lower Side conveyor 30 Upper sealer 31 Lower sealer D Fall detection signal E Upper sealer position command signal F Lower sealer position command signal W Laminate

Claims (1)

(57) [Scope of utility model registration request] 1. A first compression device and a second compression device for compressing a conveyed laminate are arranged in parallel, and a compressed laminate is provided between the first compression device and the second compression device. A sealing device for sealing an object is arranged, and the first compression device and the second compression device are provided such that an upper conveyor is movable up and down with respect to a lower conveyor, and the sealing device includes an upper sealer and a lower sealer. In a packaging machine configured to be detachable from each other, a drop amount detecting means for detecting a drop amount of the upper conveyor when the compression of the laminate is completed by the first compression device and outputting a drop detection signal. Based on the drop amount detection signal output from the drop amount detecting means, the drop amount of the upper sealer and the rise amount of the lower sealer are calculated to calculate the upper sealer position command signal and the lower sealer position command signal. An output sealer position control means, an upper sealer drive means for lowering the upper sealer to a predetermined position based on the upper sealer position command signal output from the sealer position control means, and a lower sealer output from the sealer position control means. A sealer position control device for a laminate in a packaging machine, comprising: a lower sealer drive means for raising the lower sealer to a predetermined position based on a position command signal.