JP2520041Y2 - 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 or the like, it is wrapped with a film or the like, and then a sealing process for welding the mating surfaces of this film and cutting the center of this sealing portion to perform packaging. And the cutting process for forming and separating the front seal portion of the subsequent film for 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. There are many ways to set it. Among these prior arts, for example, in order to track the operation of the sealing device with the operation of the compression device that compresses the laminate to the packaging height, both devices are linked by a roller chain or the like (for example, (See Japanese Patent Publication No. 27209/1990), 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 this driven rack is half the amount of movement of the driving rack. It is well known that the sealing portion of the film of the laminate 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 problem that the structure is complicated, the equipment cost increases, and the maintenance cost also increases.

In view of such conventional circumstances, the present invention is designed such that the sealing portion of the film in which the laminate is packaged is formed at a position of half the packaging height with a simple structure. An object of the present invention is to provide a sealer position control device for laminates in a packaging machine.

[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 the packaging machine in which the upper and lower sealers are held by the elevating frame, the sealing device is provided so as to be able to move up and down with respect to the upper conveyor when the compression of the laminate is completed by the first compressing device. A drop amount detection means for detecting a drop amount and outputting a drop amount detection signal, and a sealer for calculating the up / down amount of the lifting frame based on the drop amount detection signal output from the drop amount detection means. A sealer position control means for outputting a 置指 command signal, based on the sealer position command signal output from the sealer position control means is made and a sealer drive means for raising and lowering said lift frame to a predetermined position.

[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 has been compressed to a predetermined packaging height.

The sealing device receiving the electric signal based on the packaging height, when the joining position of both sealers held by the lifting frame reaches 1/2 of the packaging height, the position of the lifting frame in this case is changed to the electrical level. The signal is detected as a signal, the electric signal is processed by the central processing unit, and the sealer driving means is stopped, whereby it is confirmed that the seal height is adapted to the 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 S seal of the compressed laminate W is arranged.

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

In the sealing device 24, the upper sealer 30 and the lower sealer 31 are provided with the cylinder devices 30a and 30a, respectively.
The frame-shaped elevating frame 32 is provided with 31a and is held at the upper end and the lower end so that their axes are aligned and face each other. The elevating frame 32 is provided so as to be able to ascend and descend with respect to the seal portion of the laminate W by the sealer elevating 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 sealer position control means 3 that calculates the amount of elevation of the elevating frame 32 and outputs the sealer position command signal E, and based on the sealer position command signal E output from this sealer position control means 3 Sealer drive means 6 for raising and lowering the elevating frame 32 to a predetermined position, elevating amount detecting means 4 for detecting an elevating amount of the elevating frame 32 by the sealer driving means 6 and outputting an elevating amount detection signal F, and the sealer position. It comprises a sealer main controller 5 such as a servo amplifier interposed between the control means 3 and the sealer lifting means 33. The sealer position control means 3 outputs the lift amount detection signal output from the lift amount detecting means 4. The electric current supplied to the sealer driving means 6 is cut off by F.

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 detection means 14, a servo amplifier interposed between the compression device drive means 12 and the compression device current cutoff means 15. It comprises a compressor main controller 17.

The current limit value adjuster 16 is for setting a 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 detecting means 13 to the drop amount detecting means 2 is the compression speed detecting signal A.
Alternatively, it may be a rotation speed detection signal indicating the rotation speed of the compression device driving means 12 or the like, if necessary.

The descent amount detecting means 2, the sealer position control means 3, the ascending / descending amount detecting means 4, the compression speed detecting means 13, the compressor current value detecting means 14, and the compressor current interrupting means 15 are respectively arranged at the center. Processors 18a, 18b
It is configured to include the software that operates above.

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 laminate W is compressed and sealed.

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 or not 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 changed to the compressor main controller 17.
By being input to the compression device driving means 12 via
The upper conveyor 28 stops together with the compression device elevating / lowering means 27, and the compression operation for 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 a sealer position command signal E on the basis of the drop detection signal D from the sealer position control means 3, and based on the sealer position command signal E, the raising / lowering operation of the sealer raising / lowering means 33 is started in step S10. .

When the ascending / descending operation advances and the ascending / descending amount of the ascending / descending frame 32 detected by the ascending / descending amount detecting means 4 reaches the ascending / descending amount to the predetermined position according to the sealer position command signal E, the ascending / descending amount is detected at step S11. The signal F is output, and the current supplied to the sealer drive means 6 is cut off via the sealer position control means 3 in step S12 based on the lift amount detection signal F. The lifting frame 32 stops with 33,
The upper sealer 30 and the lower sealer 31 have a sealing position H2 at which the position where they are joined to each other is ½ of the packaging height H1.
Is adapted to.

[0026]

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 detection means and the descent amount detection signal output from this descent amount detection means, the up and down amount of the elevating frame that holds the upper sealer and the lower sealer and is moved up and down at the same time is calculated to calculate the sealer position command signal. And a sealer elevating means for elevating the elevating frame to a predetermined position based on the sealer position command signal output from the sealer position control means. The position is
It is always posted accurately at a position that is half the package height.

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, there is an excellent advantage that the bar code of the address paper is prevented from being erroneously read.

[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 Sealer drive means 21 Packaging machine 22 First compression device 23 Second compression device 24 Sealing device 25, 28 Upper conveyor 26, 29 Lower conveyor 30 Upper sealer 31 Lower sealer 32 Lifting frame D Drop detection signal E 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 the packaging machine in which the lifting frame is held, a fall amount detection means for detecting a fall amount of the upper conveyor when the compression of the laminate by the first compression device is completed, and outputting a fall detection signal, A sealer position control means for calculating the ascending / descending amount of the ascending / descending frame and outputting a sealer position command signal based on the descending amount detection signal outputted from the descending amount detecting means; A sealer position control device for a laminate in a packaging machine, comprising: a sealer drive means for moving the lift frame up and down to a predetermined position based on a sealer position command signal output from the sealer position command signal.