JPS63218009A - Lateral type bag-making filling packaging machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention aims to reduce manufacturing costs by simplifying the drive mechanism of a packaging machine, and also improves the feeding speed of a cylindrical packaging material and the seal body in an end seal mechanism. This invention relates to a horizontal bag-form-fill-seal packaging machine that is configured to realize suitable harmony with the non-uniform motion of the machine, and to quickly and easily make variable adjustments such as speed in response to changes in packaging specifications.

PRIOR ART For example, an object to be packaged is sequentially fed into a packaging material such as a film that is formed into a cylindrical shape by a bag making machine and fed horizontally, and the cylindrical packaging material in which the object to be packaged is enclosed is fed in a longitudinal direction. Vertical seals are applied to the overlapping surfaces of the edges, and horizontal seals and cuts are applied before and after sandwiching the packaged object of the cylindrical packaging material, respectively, to continuously form three-sided sealed packages (horizontal pillows). Horizontal bag-form-fill-seal packaging machines are generally widely known. Note that the vertical seal applied to the overlapping surfaces of the longitudinal edges of cylindrical packaging materials is generally referred to as the "center seal," and the seal applied in the direction that intersects the feeding direction of the packaging material is referred to as the "end seal."'', this term will be used herein.

The above-mentioned horizontal form-fill-seal packaging machine is equipped with various operating mechanisms such as a conveyor for supplying items to be packaged, rolls for delivering and feeding packaging materials, and a seal body for applying end seals to packaging materials. In the drive system of the conventional horizontal form-fill-seal machine, one main motor is used as a common drive source.
The configuration is such that this single motor drives the multiple actuation mechanisms via each power transmission mechanism.

That is, the drive system of the horizontal bag-forming-fill-sealing machine schematically shown in a plan view in FIG. 4 is divided into two drive systems to which power is transmitted from one main motor 10. One of them is the article supply conveyor 12 and the end seal mechanism 14.
The drive system for, the power from the main motor 10 is
Power is transmitted to the drive shaft 18 of the supply conveyor 12 and the drive shaft 20 of the end seal mechanism 14 via the main shaft 16 and a chino sprocket, respectively, and drives each corresponding mechanism at its required speed. ing. The other is a packaging material feeding drive system, in which the drive shaft 24 of the feeding roll 22 for feeding the packaging material from a raw roll (not shown) is connected to a power transmission element such as a timing belt and a pulley. The packaging material is sent to a bag making machine (not shown). In addition, a pair of rolls 44, 44 that pinch the overlapping surface of the longitudinal edge of the packaging material formed into a cylindrical shape and feed it downstream, and a pair of rolls that apply a center seal to the overlapping surface. The drive to 46°46 is also performed by the power branched from the packaging material feeding drive system.

In this case, the conveyor 12 for supplying the packaged items has an attachment that positions the packaged items at regular intervals, which moves per pitch, and a rotary seal body 26, 26 in the end seal mechanism 14 rotates once (each rotation). When one seal body is attached to the shaft), the speed setting is made so that the timing matches the timing.

However, during one rotation of the seal body 26, 26, the end seal (and cut) is synchronized with the feeding speed of the packaging material at least in the section where the end seal (and cut) is performed in contact with the packaging material. ) is completed, it is necessary to increase the rotation speed in order to wait for the next sealing operation. In this way, the seal body 26.26
Since the motor performs nonuniform motion, a configuration is adopted in which an inconstant velocity mechanism 28 consisting of a complicated mechanism such as an eccentric crank is provided, and the speed is adjusted by driving this with a pilot motor 29.

Furthermore, when end sealing and cutting the packaging material using the end seal mechanism 14, it is necessary to control the sealing/cutting position to a fixed position so as to deviate from the various patterns printed on the packaging material. Therefore, a registration mark printed in advance on the packaging material is detected by a sensor, and the detection timing and drive shaft 20 of the end seal mechanism 14 are
By comparing the detection value from the photoelectric sensor 32 that cooperates with the timing cam 30 provided in relation to the
, 40 are used to change the supply speed of the packaging material. The timing cam 3o is automatically set by the pilot motor 42, and the discharge conveyor 48 for carrying out each package after wrapping is also driven by the branched power from the main motor 10.

Problems to be Solved by the Invention In the horizontal bag-form-fill-seal packaging machine according to the prior art described above, power is transmitted from a common motor to many operating mechanisms, and the speed of each operating section is controlled by a differential gear mechanism or independent gear mechanism. Since the change is made using a constant velocity mechanism, etc., the configuration is extremely complicated, requiring a lot of effort and time to assemble, and the complicated mechanical configuration causes frequent failures. .

Moreover, the adoption of an automatic adjustment mechanism using a pilot motor is a factor that increases manufacturing costs.

Furthermore, when changing the dimensions of the packaged item to a different specification,
Each time, it is necessary to adjust the crank eccentricity of the inconstant velocity mechanism 28 attached to the end seal mechanism 14 and change the speed of the seal body 26,26.

However, large changes are mechanically difficult and require a lot of time to make adjustments, so quick instant changes are not possible. For example, it is extremely difficult with conventional mechanical configurations to feed out a packaging material containing a long packaged item at a low speed, and then end-seal and cut the packaging material.

Moreover, since the non-uniform motion of the sealing bodies 26, 26 is mechanically obtained by a speed change mechanism, it is difficult to accurately synchronize the feeding speed of the packaging material in the sealing and cutting sections. In addition, the above-mentioned printing pattern combination also needs to be readjusted due to changes in the specifications of packaging materials and items to be packaged.
Similarly, major changes are mechanically impossible.

Purpose of the Invention The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art, and to overcome them.
The drive mechanism of the packaging machine was simplified to reduce manufacturing costs, and the speed of feeding the cylindrical packaging material and the inconstant motion of the sealing body in the end seal mechanism were achieved in a suitable balance, and at the same time, the packaging specifications were changed. An object of the present invention is to provide a horizontal bag-forming-filling-sealing machine that can quickly and easily make variable adjustments such as speed.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention dispenses a film-like packaging material and forms it into a cylindrical shape using a bag-making machine, and produces a package formed into this cylindrical shape. A horizontal form-fill-fill packaging machine that applies a center seal to a material, supplies an object to be packaged into the packaging material, and further applies an end seal to the packaging material in a direction transverse to a feeding direction.

A motor that drives a conveyor that conveys the packaged items at predetermined intervals based on the required packaging rotation speed and supplies the packaged items to a cylindrical packaging material; a supply origin sensor that constantly monitors the delivery position of the packaged items and issues an origin signal; a variable speed motor that drives a pair of sealing bodies that apply an end seal to the cylindrical packaging material; Receiving and calculating various data such as the origin position signal from the supply origin sensor regarding the delivery position of the object and other various data such as the cutting pitch of the packaging material, the speed for driving the seal body can be changed based on the calculated control signal. The present invention is characterized by comprising a control circuit that controls a motor to match the peripheral speed of rotation of the seal body with the feeding speed of the packaging material at least in a section where the end seal is applied to the cylindrical packaging material.

Example Next, regarding the horizontal bag-form-fill-seal packaging machine according to the present invention.

Preferred embodiments will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a preferred embodiment of a horizontal bag-form-fill-seal packaging machine according to the present invention, in which an article supply conveyor 50 located at the most upstream side of the packaging machine is arranged at a predetermined pitch in an endless chino 60. The bag-making machine 64 is equipped with attachments 62 for positioning articles, and each attachment 62 pushes one article 49 to be packaged at a predetermined interval to continuously supply the article to a bag-making device 64 located downstream. ing. This conveyor 50 is driven by a motor A via a power transmission mechanism consisting of a sprocket and a chino provided on the illustrated drive shaft 67. This motor A is, for example, an AC induction motor, and is variable speed controlled by a variable speed control device 78 such as an inverter shown in FIG.

A supply origin sensor S1 such as a rotary encoder is disposed on the drive shaft 67, and is used to monitor the position of the attachment 62 provided on the supply conveyor 50, that is, the object to be packaged 49.
The position where the bag is sent to the downstream bag making device 64 is constantly monitored.

An origin signal regarding the feeding position of the object to be packaged 49 from the supply origin sensor Si is input to a control circuit 58, which will be described later.

The packaging material 52 pulled out from the original fabric roll (not shown) is compressed by a pair of delivery rolls 54 and 54, and is delivered to a bag making device 64 disposed downstream of the supply conveyor 50. . Then, the cylindrical bag body 52 is passed through this bag making machine 64.
The packaging material 52 formed in the shape a is fed to the downstream side with the overlapping surfaces of the end edges thereof in the longitudinal direction being pinched by a pair of feed rolls 66, 66, and also fed to the downstream side by a pair of sealing rolls 68. Center seal is applied by .68. The pair of feed rolls 54, 54 described above are driven by a motor B, such as a servo motor, capable of variable speed control via a power transmission system consisting of a timing belt and a pulley as shown in FIG. Power is further branched from this servo motor B via a drive shaft 65, and the power is branched off to each pair of feed rolls 66.66 and sealing rolls 68.6.
8 can be driven synchronously. The rotation speed of the servo motor B is constantly detected by a rotary encoder RE, and the servo control of the servo motor B is performed by feeding back the rotation speed to a control circuit 58, which will be described later.

Incidentally, registration marks (not shown) are printed at regular intervals on the longitudinal edge of the packaging material 52, and these registration marks are used as sensor S consisting of a photoelectric element shown in FIG.
2 to be read and detected.

Further, the seal bodies 70, 70 of the end seal mechanism 56 are rotationally driven by a motor C1, for example, a servo motor, which can control speed via a required transmission system consisting of a chino and a sprocket, and the servo motor C is also controlled by a rotary encoder RE2. Rotation is controlled by servo. In addition to the rotary sealing mechanism shown in the embodiment, this sealing body 70.70 can be used to synchronously move horizontally along the feeding direction of the cylindrical bag 52a to apply a seal, and then move upwardly and horizontally. A so-called block motion type sealing mechanism in which the sealing mechanism moves backward, descends again, and then moves horizontally can also be suitably used. An end seal origin sensor S is provided in the rotation system related to the rotation of the seal body 70, 70, and the detection surface of the photoelectric sensor S2 is set based on the end seal origin signal detected by the origin sensor S. When the registration mark on the cylindrical bag body 52a passes quickly, the value is detected and a deceleration command is issued to the servo motor B via the control circuit 58. On the other hand, if the registration mark passes the photoelectric sensor S late, the value is detected and a speed increase command is issued to the servo motor B to perform printing pattern matching.

FIG. 3 is a block diagram schematically showing an example of a control circuit 58 constituting a part of the horizontal bag-forming-filling-sealing machine according to the present invention. The central processing unit (CPU) in this control circuit 58 includes a calculation section 72 that functionally performs calculation processing of input data, a control section 73 that controls motor A, servo motor B, and servo motor C, and a control section 73 that performs calculation processing of input data. The register section 74 stores the information. The operation panel 75 provided on the packaging machine body has a keyboard for inputting various data, buttons for commanding start/stop of the packaging machine, speed setting volume, etc., and the data is stored in the register section 74 via the operation panel interface 76. It has become so. This input data includes the cut pitch determined by the packaging cutting length for one bag of the packaging material 52, and the
Numerical data such as the height dimension and the radius dimension of the seal body 70 in the end seal mechanism 56 are input using the keyboard each time there is a change in these specifications. The speed setting volume is used to give a speed command to the motor A, which is variable speed controlled by a variable speed control device 78, which will be described later.

In addition, ■ the origin signal from the supply origin sensor S1 that monitors the position of the attachment 62, ■ the registration mark signal from the photoelectric sensor S2 that reads and detects the registration mark attached to the packaging material 52, and ■ the rotation of the seal body 70.70. The end seal origin signal from the end seal origin sensor S3 to be detected is transmitted through the sensor input interface 77,
It is taken into the register section 74 as a digital input.

The motor A is variable speed controlled by a variable speed control device [78, typically an inverter, and the variable speed control device 78 receives a speed command for the motor A from the speed setting volume described above. given directly. Further, the servo motor B that feeds out the packaging material 52
The servo amplifier 79 controls the servo motor C for end sealing the cylindrical bag 52a, and the servo amplifier 80 controls the servo motor C.

Furthermore, the origin signal from the aforementioned supply origin sensor S1 is input to the servo control section 73a in the control section 73 to teach the servo motor B and servo motor C the current position of the attachment 62. Similarly, a rotation signal from the rotary encoder RE1 that detects the rotation speed of the servo motor B is input to the servo control section 73a and the servo amplifier 79. Further, the rotary encoder RE detects the rotation speed of the servo motor C.

A rotation signal from the servo controller 73a is also input to the servo amplifier 79.

The basic sequence control section 73b processes various input conditions and sends signals for starting and stopping the motor A to the variable speed control device 78, and also performs abnormality detection to control the variable speed. It is also possible to stop the control device 78 from functioning.

Function of the Embodiment The function of the horizontal bag-forming-fill-sealing machine according to the embodiment constructed as described above will be explained first. Prior to operating the device, numerical data such as the cutting pitch of the packaging material 52, the height dimension of the packaged object 49, and the radius dimension of the seal body 70 in the end seal mechanism 56 are input using the keyboard of the operation panel 75. The data is stored in the register section 74 via the operation panel interface 76. Further, the speed of the motor A is set by giving a speed command to the variable speed control device 78 using the speed setting volume.

When the apparatus is activated by a button on the operation panel 75, the motor A, servo motor B, and servo motor C rotate in unison. The supply conveyor 50 is driven by the motor A, and the articles 49 are delivered by attachments 62 provided on the conveyor.

They are pushed out one by one. In addition, the servo control section 73
The origin signal from the supply origin sensor S□ is input to a,
The position of the attachment 62 that is pushing the object to be packaged 49 is taught. Further, a rotation signal from the rotary encoder RE attached to the servo motor B is input to the servo control section 73a and the servo amplifier 79. Further, a rotation signal from a rotary encoder RE attached to the servo motor C is also input to the servo control section 73a and the servo amplifier 79.

The packaging material 52 stored in the register section 74
Numerical data such as the cutting pitch, the height dimension of the packaged object 49, and the radius dimension of the seal body 70 are processed by the arithmetic section 72, and a command is issued to the control section 73. In the servo control unit 73a, based on the position data of the attachment 62 based on the origin signal from the supply origin sensor S,
The rotations of servo motor B and servo motor C are synchronously controlled. Therefore, depending on the timing at which the article to be packaged 49 is fed into the cylindrical bag body 52a, the delivery of the packaging material 52 by the servo motor C and the inconstant speed rotation of the seal body 70, 70 by the servo motor C are preferably performed. It will be done. In addition, if the cut pitch of the packaging material 52, the height dimension of the packaged object 49, the radius dimension of the seal body 70, etc. change due to changes in the packaging order, etc., the data can be changed by inputting the data from the keyboard on the operation panel 75. We can respond quickly with only one person.

In this way, the aforementioned servo motor B and servo motor C are synchronized with the aforementioned motor A via the aforementioned control circuit 58, and in that sense, motor A is synchronized with servo motor B and servo motor C. This is the reference for synchronization of motor C. That is, as described above, the supply conveyor 50 is connected to the motor A, which is the master motor.
The attachment 62 pushes each packaged object 49 toward the downstream side at a predetermined speed.

Then, each object to be packaged 49 is fed into the cylindrical bag 52a one by one. Packaging materials required per piece 52
In this sense, the packaging material feeding servo motor B is subordinate to the motor A that drives the article supply conveyor 5o.

Further, one of the seal bodies 70 in the end seal mechanism 56
As mentioned above, the circumferential speed per rotation is at least the cylindrical bag 52a.
In the section where end sealing (and cutting) is performed, the servo motor C is controlled so as to match the feeding speed of the cylindrical bag 52a containing the object to be packaged 49 therein. Therefore, although the circumferential speed of the seal body 70 is inconstant as a whole, the one conveyed and supplied from the supply conveyor 50
The seal body 70 rotates once in response to each packaged object 49, and the servo motor C is subordinate to the motor A that drives the supply conveyor 5o. Note that no dependent relationship is set between servo motor B and servo motor C.

Further, in the embodiment, a case has been described in which, for example, an AC induction motor that can be controlled by an inverter is used as the motor A that drives the article supply conveyor 50, but this is done in view of the need for cost reduction. Of course, a servo motor may be used as the motor A.

Effects of the Invention As described above, according to the horizontal form-fill-seal packaging machine according to the present invention, the variable speed motor for driving the seal body is synchronously controlled in accordance with the motor that drives the article supply conveyor. Since the end seal mechanism does not require a complicated mechanical system such as a conventional inconstant speed mechanism or differential gear mechanism, the structure can be extremely simple. Therefore, manufacturing costs are reduced, and the speed of each operating section can be changed significantly as required. Further, there are other beneficial advantages such as the fact that adjustment of the operating portion, which conventionally required complicated labor, becomes easier.

Furthermore, regarding the article supply conveyor located at the most upstream side of the packaging machine, the motor that drives it is used as a master motor, and the motor that drives the seal body on the downstream side is subordinated to this motor, which simplifies the control system. As well as becoming
There is an advantage that an inexpensive general motor that does not require feedback control can be used as the conveyor drive motor. 4
, Brief Description of the Drawings FIG. 1 is a schematic perspective view of a horizontal bag-forming-filling-sealing machine according to the present invention, and FIG. 2 is a plan view of the horizontal bag-forming-filling-sealing machine shown in FIG. 1.
Figure 3 shows the central processing unit (CPU) of a microcomputer that controls servo motor B and servo motor C.
), and FIG. 4 is a schematic plan view showing an example of a drive system of a horizontal bag-forming-filling-sealing machine according to the prior art.

Claims (1)

[Claims] The film-like packaging material (52) is fed out and the bag making machine (64)
) is formed into a cylindrical shape, and packaging material formed into this cylindrical shape (
At the same time, a center seal is applied to the packaging material (52).
2) In a horizontal bag-forming-fill-sealing machine that feeds the object to be packaged (49) inside and further applies an end seal to the packaging material (52) in a direction that intersects with the feeding direction, a motor (A) that drives a conveyor (50) that conveys an object to be packaged (49) at a predetermined interval and supplies the object to be packaged (49) to a cylindrical packaging material (52); ) A supply origin sensor (S_1) that constantly monitors the delivery position of each packaged object (49) sent out from the conveyor (50) driven by the conveyor (50) and issues an origin signal; ) and a variable-speed motor (C) that drives a pair of seal bodies (70, 70) that apply an end seal to the packaged objects (49), and the origin position from the supply origin sensor (S_1) regarding the delivery position of each packaged object (49). Signals, other packaging materials (5
2) receives and calculates various data such as the cut pitch, and controls the variable speed motor (C) for driving the seal body using the calculated control signal, and controls at least the cylindrical packaging material (52 ) The horizontal type is characterized by comprising a control circuit (58) that matches the rotational circumferential speed of the sealing body (70, 70) with the feeding speed of the packaging material (52) in the section where the end seal is applied to the packaging material (52). Bag making, filling and packaging machine.