JP2000006923A - Automatic packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quite superior automatic packaging device in which the most-suitable vertical melting seal corresponding to a thickness of connected sections formed at one location can be applied easily and instantly without decreasing a transferring speed of a heat-shrinkage film or without increasing a holding pressure of the vertical sealing device up to such a value as one capable of melting and cutting more than two heat-shrinkage films even if a thickness of overlapped portions of the heat-shrinkage films having a vertical melting and cutting seal applied thereto is changed into a thickness more than 2 heat-shrinkage films. SOLUTION: There is provided an automatic packaging device in which some packaged products transferred in sequence are packed continuously with a heat-shrinkage film 4a, a vertical seal is applied to an overlapped portion 4b of the heat-shrinkage films 4a packaging the packaged products along a transferring direction of the packaged products or a pair of sealing discs 5a for applying the vertical melting and cutting seal are installed. This device is constructed such that a holding pressure applied by the sealing discs 5a can be increased in response to a thickness of the connected part 4a that vertical sealing devices 5 form at the partial location 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic packaging apparatus for a packaged object, and more particularly, to a vertical position along a conveying direction of a packaged object at a position where a heat-shrinkable film enclosing the packaged object is superimposed. The present invention relates to an automatic packaging apparatus in which a vertical sealer for applying a fusing seal can increase a clamping pressure by a sealer disk in accordance with a seam state or a thickness of a joint formed at a part by joining individual heat-shrinkable films. It is.

[0002]

2. Description of the Related Art Conventionally, in an automatic packaging apparatus for a package to be packaged for individually packaging packages sequentially conveyed,
For example, as one device for applying a vertical fusing seal, for example,
There is a configuration shown in FIG.

[0003] That is, the above-mentioned apparatus is used to transfer the packaged objects 3 sequentially sent via a supply conveyor attachment 2a which is axially fixed at a constant pitch to a supply conveyor 2 using a chain conveyor or the like. ), And continuously covers the heat-shrinkable film 4a stretched obliquely downward from the front via a bag making machine (former) 4, and then the heat-shrinkable film
The vertical heat sealer 5 having a pair of sealer disks 5a provided so that the lower portion of the package 4a is located below the bag making machine 4 is longitudinally melt-sealed along the transport direction of the packaged object 3 while cutting excess heat. The shrink film 4a is continuously discharged as a scrap (arrow B), and the discharged scrap is continuously wound through a winding device (not shown).

[0004] Next, a tubular heat-shrinkable film 4a to which a vertical fusing seal has been applied and a packaged object 3 stored at a predetermined interval in the heat-shrinkable film 4a are transferred to an upper feed conveyer 6a of a transfer conveyer 6 and a lower end thereof. While being transported to the horizontal sealer 7 in a sandwiched state via the feed conveyor 6b, a direction intersecting the transport direction of the package 3 between the packages 3 through the horizontal sealer 7 between the tubular packages 3a. A horizontal seal or a horizontal fusing seal.

Thereafter, the package 3 which has been cut individually via the horizontal fusing seal or via the horizontal fusing seal is sent into the shrink tunnel 9 via the discharge conveyor 8 and the heat-shrinkable film 4a. The packaged object 3 can be packaged through the heat shrinkage.

[0006] Further, the automatic packaging apparatus is shown in FIG.
As shown in (b), the heat generated in the cylindrical shape along the conveying direction of the packaged object 3 through the fusing portion 5b of the peripheral portion of the sealer disk 5a of the vertical sealer 5 located below the bag making device 4. Shrink film 4a
The vertical fusing seal is carried out along the conveying direction of the package 3 through a heat temperature suitable for the thickness and material of the heat-shrinkable film 4a and the optimum clamping pressure as a reference. Can be applied.

The vertical sealer 5 has a pair of pivoting arms 5c which rotate so as to obtain a predetermined clamping pressure via urging means using an air cylinder (not shown). Sealer disk 5a provided at the tip and each other
Can be arbitrarily set to a reference clamping pressure for providing an optimum seal for the thickness and material of one portion 4b of the heat-shrinkable film 4a by causing the film 4a to approach (arrow C) via the urging means. In order to prevent the film 4a from being burned out by the heat of the sealer disk 5a when the apparatus is stopped due to a supply failure of the packaged object 3 or the like, each sealer disk 5a is fully opened (arrow D) as shown in FIG. It has a structure that can be used.

[0008]

However, the automatic packaging apparatus for a packaged object having the above configuration has the following problems.

That is, the automatic packaging apparatus having the above-described configuration
Sealer disk of vertical sealer 5 located below bag making machine 4
The heat temperature suitable for the thickness and the material of the heat-shrinkable film 4a using the overlapping part 4b of the heat-shrinkable film 4a which has become a cylindrical shape along the transport direction of the packaged object 3 in 5a, and the optimal temperature to be a reference The excess heat-shrinkable film 4a cut while applying vertical fusing sealing along the conveying direction of the packaged object 3 via the clamping pressure is continuously discharged as scrap, and the discharged scrap is passed through a winding device. When the heat-shrinkable film 4a currently used is used up, the next heat-shrinkable film 4a is, for example, heat-sealed (in this case, the end portion of each film 4a). And the leading end are in a superposed state) or an adhesive tape (in this case, the terminal end and the leading end of each film 4a may be in a superposed state, or the edge of the terminal end of each film 4a The edge of the tip and the Various types of adhesive tapes may be stuck across the end and end of each film 4a), etc.) or when using a device such as a splicer without stopping the device. In addition, there is a case where there is a portion connected to the original sheet (heat-shrinkable film wound in a roll) of the heat-shrinkable film 4a in advance.

Therefore, when the individual heat-shrinkable films 4a are connected or connected at the time of packaging of the packaged object 3,
When a seam state occurs such that a fold or an adhesive tape is present on a part of the heat-shrinkable film 4a, or when the heat-sealing is performed as well as the fold or the adhesive tape, the thickness of the heat-shrinkable film 4a is increased by polymerization of each heat-shrinkable film 4a. Various joints 4c, such as an increase in the number, are formed in one portion 4b of the heat shrinkable film 4a.

Therefore, when the joint 4c formed on the heat-shrinkable film 4a passes through the sealer disk 5a of the vertical sealer 5, for example, as shown in FIG. Not only must the vertical heat-sealing seal be applied to the heat-shrinkable film 4a), but also the heat-shrinkable film 4a, as shown in FIG. When this occurs, it is necessary to apply a vertical fusing seal to at least six heat-shrinkable films 4a.

Here, as described above, a pair of sealer disks
The surplus heat-shrinkable film 4a cut and cut by the vertical sealer 5a provided with the vertical sealer 5 along the conveying direction of the packaged object 3 is continuously discharged as scrap and taken up by a winding device (not shown). ), So that the scrap generated by the vertical fusing seal must be securely separated, which is an absolute condition for the operation of the apparatus.

Therefore, in the vertical sealer 5, the thickness of the joining portion 4c provided at one portion 4b of the heat shrinkable film 4a is, for example, two or more (4 to 6 sheets) from the two heat shrinkable films 4a. ), Or in a seam state (not shown) in which a fold or an adhesive tape is present in a part of the heat-shrinkable film 4a, etc. It is necessary to melt the heat-shrinkable film 4a and cut off the scrap. However, usually, the vertical sealer 5 has a thickness of a portion 4b where the heat-shrinkable film 4a to be polymerized, that is, 2 of the heat-shrinkable film 4a. The heating temperature and the clamping pressure are set so as to be suitable for the thickness, transfer speed, material and the like of the sheet.

Therefore, conventionally, as described above, the heat-shrinkable film
If the thickness of the joining portion 4c provided at the part 4b where the 4a is superimposed becomes equal to or more than two sheets of the heat-shrinkable film 4a, the heat is transmitted to the increased thickness, so that good fusing is performed. As soon as possible, the transfer speed of the heat-shrinkable film 4a is temporarily reduced, and after the joining portion 4c formed at the position 4b passes through the sealer disk 5a of the vertical sealer 5, the transfer speed is again returned to the original. It is conceivable to transfer the heat-shrinkable film 4a to apply a vertical fusing seal to the heat-shrinkable film 4a, but in this case, the efficiency was extremely low in terms of productivity.

Further, it is conceivable to increase the clamping pressure of the vertical sealer 5 to a value at which two or more heat-shrinkable films 4a can be blown in advance, but this will surely lead to wear and breakage of the sealer disk 5a. It is impossible in reality,
Therefore, in any case, there has been a problem that some early solution is required.

However, the present invention solves the above-mentioned problems. For example, the thickness and the seam of the joint formed at a portion where the heat-shrinkable film to be longitudinally sealed is superimposed are changed. Even in the case of two or more heat shrink films, the transfer speed of the heat shrink film is reduced, or the clamping pressure of the vertical sealer is increased in advance to a value at which two or more heat shrink films can be blown. The excess heat-shrinkable film cut while applying the optimal vertical fusing seal according to the thickness of the joint formed at one part is continuously discharged as scrap without waste, and the discharged scrap is further discharged. An object of the present invention is to provide an extremely excellent automatic packaging apparatus capable of improving the operation rate of the apparatus without stopping the apparatus by reliably and continuously winding the apparatus through a winding apparatus.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has developed an entirely new automatic packaging apparatus for an object to be packaged, and has taken the following technical measures.

That is, according to the present invention, the package 3 sequentially conveyed is continuously covered with the heat-shrinkable film 4a, and the heat-shrinkable film 4a covering the package 3 is polymerized. In an automatic packaging apparatus having a pair of sealer discs 5a for vertically fusing and sealing the portion 4b along the transport direction of the packaged object 3, the vertical sealer 5 joins the individual heat-shrinkable films 4a. Since the clamping pressure by the sealer disk 5a can be increased according to the seam state or thickness of the joint 4c formed at the part 4b, the thickness of the joint 4c formed at the part 4b is increased. Even in such a case, the joint between the sealer disks 5a can be formed without changing the transfer speed of the heat-shrinkable film 4a and without constantly applying an excessive clamping pressure that causes wear and damage to the sealer disk 5a. Increased thickness only at the moment 4c passes There is an advantage that a reliable vertical fusing seal can be applied to one portion 4b of the heat shrinkable film 4a with an optimum clamping pressure according to the degree.

Further, the vertical sealer 5 can increase or decrease the clamping pressure of the joint 4c by the sealer disk 5a via an electric signal output from a detection sensor 10 for detecting the seam state or thickness of the joint 4c. Since the heat shrinkable film 4a to be longitudinally melt-sealed is partly polymerized 4b
Even if the thickness of the joints 4c is different from each other or if the joints are at improper spacing, the vertical fusing seal is always secured to one part 4b of the heat-shrinkable film 4a with the optimal clamping pressure according to the thickness of the joint 4c There is an advantage that can be applied.

Further, each of the pair of sealer disks 5a
Since the first step is slightly separated when the apparatus is stopped, and the two-step operation of the second step is further separated when the start signal is not input within a predetermined time after the apparatus is stopped, when the apparatus is stopped, Not only can the heat-shrink film 4a not only be instantaneously prevented from being damaged by the heat of the sealer disk 5a, but also if a start signal is input within a predetermined time after the device is stopped, the first step Each of the slightly separated sealer disks 5a can be instantly closed in a short time, thereby shortening the time required to start the vertical fusing and sealing process required when the apparatus is restarted, and minimizing the reduction in production efficiency. If the start signal is not input within a predetermined time after the device is stopped, the respective sealer disks 5a Furthermore there is a can benefit to prevent damage of the heat shrinkable film 4a more reliably by heat sealer disc 5a by to separate.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> An embodiment of an automatic packaging apparatus according to the present invention will be described below with reference to the drawings.
Descriptions of the same parts as those of the conventional automatic packaging apparatus will be omitted below.

In FIG. 1, reference numeral 1 denotes a supply conveyor 2, a bag making machine 4, a heat-shrinkable film 4a, a vertical sealer 5, an upper feed conveyor 6a and a lower feeder for a package 3 as disclosed in FIG. A transfer conveyor 6 comprising a conveyor 6b, a horizontal sealer 7,
1 shows an automatic packaging device including a discharge conveyor 8 and a shrink tunnel 9 (not shown).

Numeral 10 denotes a detection sensor, which measures the thickness of a part 4b where the heat-shrinkable film 4a, which is supplied at a predetermined transfer speed and is successively conveyed, continuously encloses the package 3, is overlapped by a vertical sealer. 5 for always detecting at the upstream position.

Reference numeral 11 denotes a pressure control device, which uses an electric signal output from the detection sensor 10 as an input signal and automatically controls an air pressure output in accordance with a change in the input signal.

Reference numeral 12 denotes an air cylinder which is operated by the air pressure output from the pressure control device 11 and which can increase and decrease the holding pressure of the vertical sealer 5 so as to apply a vertical fusing seal to the part 4b.

Each of the vertical sealers 5 is provided with a speed reducer 12b which is driven via a telescopic rod 12b of an air cylinder 12.
And a pair of left and right pivotal support arms 5c which are rotatable via a pair of right and left sealer pivoting devices 12c attached to the speed reduction device 12b.

In the pressure control device 11, the detection sensor 10 detects the thickness of the joint 4c for joining the individual heat-shrinkable films 4a provided at the portion 4b where the heat-shrinkable film 4a overlaps, Thereafter, when a predetermined electric signal corresponding to the thickness output from the detection sensor 10 is input as an input signal to the controller 15, the two-way air supply valve 16 and the pressure sensor 18 via the controller 15 are used. The supply pressure P flows and the output air pressure A rises. As a result, the clamping pressure of the vertical sealer 5 via the air cylinder 12, the reduction gear 12b, and the sealer shaft rotating device 12c can be increased. Thus, according to the pressure control device 11, the two-way valve 16 for air supply and the two-way valve 17 for exhaust repeatedly supply and exhaust according to the difference between the output air pressure A and the set pressure given by the input signal. Pressure compensation It is in accordance with the force signal advantages can be obtained (proportional) output air pressure A.

The automatic packaging apparatus according to one embodiment of the present invention has the above configuration. Therefore, the vertical sealer 5 can increase or decrease the clamping pressure of one portion 4b of the heat-shrinkable film 4a via the sealer disk 5a via an electric signal output from the detection sensor 10 for detecting the thickness of the portion 4b. is there.

Therefore, in the case where a joint 4c in which the heat-shrinkable films 4a are joined by heat-sealing is provided in one portion 4b of the heat-shrinkable film 4a to which the vertical fusing seal is applied, for example, one of the heat-shrinkable films 4a The thickness of the portion 4b passing through the sealer disk 5a due to the end of the film 4a being bent or the like, that is, the thickness of the joint 4c is equal to or more than two sheets of the heat-shrinkable film 4a (six sheets in FIG. 1). Even if it becomes thick,
At the moment when the joint 4c passes between the sealer disks 5a without changing the transfer speed of the heat-shrinkable film 4a and without constantly applying an excessive clamping pressure that causes wear or damage to the sealer disk 5a. The excess heat-shrinkable film 4a cut while applying a reliable longitudinal fusing seal to one portion 4b of the heat-shrinkable film 4a with an optimum clamping pressure according to the increased thickness is continuously discharged as scrap, and the discharge is performed. It is possible to reliably and continuously wind the scrap made through the winding device, and thus there is an excellent advantage that the operation rate of the device can be improved without stopping the device.

Further, the vertical sealer 5 is configured so as to be able to increase or decrease the clamping pressure of the joint 4c by the sealer disk 5a via an electric signal output from a detection sensor 10 for detecting the thickness of the joint 4c. Therefore, even when the thickness of the joint 4c at the portion 4b where the heat-shrinkable film 4a on which the vertical fusing seal is applied is superimposed is different from each other or the joints are at an improper interval, the thickness always depends on the thickness of the joint 4c. With the optimal clamping pressure, the excess heat-shrinkable film 4a, which has been cut while applying a reliable longitudinal fusing seal to the joint 4c of one part 4b of the heat-shrinkable film 4a, is continuously discharged as scrap and passed through a winding device. There is an advantage that the operation rate of the apparatus can be improved by reliably and continuously winding.

Further, the pressure control device 11 is connected to the detection sensor 10
Automatically controls the output air pressure in accordance with a change in the input signal using an electric signal proportional to the thickness of the joint portion 4c of the part 4b output from the controller 4b.
Cylinder operated by air pressure output from
12.Because it is configured to be able to increase and decrease the clamping pressure of the joint 4c formed at the position 4b via the speed reducer 12b and the sealer shaft rotating device 12c, an extremely simple system with extremely low failure rate is provided. There is an advantage that the clamping pressure can be automatically increased and decreased.

<Second Embodiment> Further, as shown in FIG. 2, an automatic packaging device, for example, an emergency operation signal output device 14
May be provided. That is, the emergency operation signal output device 14 is a safety device for urgently stopping the automatic packaging device when the flow of the sequentially transported package 3 is stopped or when the supply of the heat-shrinkable film 4a is stopped. When the device 13 is operated, each of the pair of sealer disks 5a is connected to the air cylinder 12, the reduction device 12b, and the sealer shaft rotation device 12 via a stop notification signal output from the safety device 13.
Using c to output a first emergency operation signal to the controller 15 of the pressure control device 11 to slightly separate (arrow E),
In addition, when the start signal is not input to the safety device 13 within a predetermined time after the device is stopped, each of the pair of sealer disks 5a slightly separated from each other (arrow E) as described above is moved to the air cylinder 12, the speed reduction device. 12b and sealer shaft rotation device
The second emergency operation signal is output to the controller 15 so as to be further separated (arrow F) by using 12c. Reference numeral 14a denotes a detection sensor that detects the degree of opening of the pivoting arm 5c that rotates to face and separate at a predetermined position, and 14b denotes a sensor that stops the opening of the pivoting arm 5c at a predetermined position. 1 shows brake cylinders, each of which is managed via an emergency operation signal output device 14 and a controller 15.

Therefore, the first step in which each of the pair of sealer disks 5a is slightly separated when the apparatus stops, and the case where no start signal is input within a predetermined time after the apparatus stops, via the emergency operation signal output apparatus 14. Since it is configured to perform a two-step operation of the second step further away from the
When the apparatus is stopped, there is an advantage that the heat-shrinkable film 4a can be instantaneously prevented from being damaged by the heat of the sealer disk 5a.

The emergency operation signal output device 14 is slightly separated in the first step when a start signal of the automatic packaging device is input to the safety device 13 within a predetermined time after the device is stopped. It outputs an emergency operation release signal to the controller 15 for closing each of the sealer disks 5a to return them to their original positions.

Therefore, when the start signal is input within a predetermined time after the device is stopped, it is possible to close each of the sealer disks 5a slightly separated in the first step in a short time instantly. Therefore, not only is there a production advantage that the reduction in production efficiency can be minimized by shortening the time required to start the vertical fusing and sealing process required when the apparatus is restarted, but also a start signal is generated within a predetermined time after the apparatus is stopped. If no input is made, there is an advantage that damage to the heat-shrinkable film 4a due to heat of the sealer disk 5a can be more reliably prevented by further separating the respective sealer disks 5a in the second step.

In the above-described embodiment, the vertical sealer 5 uses an electric signal output from a detection sensor for detecting the thickness of the joint 4c formed at the position 4b as an input signal, and changes with the change of the input signal. An air cylinder 12, a speed reducer 12b, and a sealer shaft rotating device 12 that are operated by air pressure output from a pressure control device 11 that automatically controls output air pressure.
Although it is configured to be able to increase and decrease the clamping pressure of the part 4b via c, it is not always necessary to increase or decrease the clamping pressure of one part 4b via the vertical sealer 5 with the air cylinder 12, for example, the part 4b It may be configured to increase or decrease the clamping pressure of the joint portion 4c formed by a torque motor or a pulse motor (not shown) that drives an electric signal output from the detection sensor as an input signal. Coming heat shrink film 4a
The pinching pressure of the vertical sealer 5 can be increased in accordance with the thickness of the joint 4c formed at the portion 4b where the superposition occurs (in order to return to the original clamping pressure after the joint 4c passes through the vertical sealer 5). Once the increased clamping pressure is reduced to the original clamping pressure, the clamping pressure can be increased or decreased exactly according to the thickness of the part 4b.)
If this is the case, the specific structure, number, location, etc. of the clamping pressure increasing / decreasing members are not limited, but not only the specific configuration of the pressure control device 11 but also the presence or absence of the pressure control device 11 Needless to say, it is not an essential requirement of the invention.

Further, in the above embodiment, the detection sensor 10 is provided at a predetermined distance from the vertical sealer 5.
Is provided at the upstream position (front position) of the package, but the point is that the package 3 which is supplied at a predetermined transfer speed and is sequentially conveyed is continuously wrapped and the package 3 is wrapped. Contact sensor, non-contact sensor may be used as long as it is a detection sensor 10 having a function that can always detect the thickness of the polymerized part 4b of the heat-shrinkable film 4a. The ten structures, types, locations, etc. are not limited.

Further, in the above embodiment, the detection sensor 10 constantly detects the thickness of the portion 4b where the heat-shrinkable film 4a is superimposed at the upstream position of the vertical sealer 5 so that the heat formed at the portion 4b is detected. Polymerized joint 4c for seal
For example, the detection sensor 10 is configured to detect the thickness of the joined portion 4c increased through a seam state such as a fold or an adhesive tape present on a part of the heat-shrinkable film 4a. In short, the detection sensor 10 can output an electric signal for enabling the clamping pressure of the joint 4c by the sealer disk 5a to be increased or decreased by detecting the joint state or the thickness of the joint 4c. If so, it goes without saying that the specific type, structure, location and number of detection sensors 10 are not limited at all.

Further, in the above embodiment, the case where each of the pair of sealer disks 5a performs the two-step operation of the first step and the second step has been described, but it is needless to say that the two steps are not necessarily essential to the present invention. Therefore, the presence or absence of the specific member configuration and the like is not limited at all, but each of the pair of sealer disks 5a provided in the automatic packaging device performs a two-stage operation, so that when the device is stopped, heat shrinkage occurs. Not only can the film 4a be instantaneously prevented from being damaged by the heat of the sealer disk 5a, but if a start signal is input within a predetermined time after the device is stopped, the film is slightly separated in the first step. Each of the sealer disks 5a can be instantly closed in a short time, thereby shortening the time required to start the vertical fusing and sealing process required when the apparatus is restarted. Not only has the production advantage of reducing production efficiency to a minimum,
If the start signal is not input within a predetermined time after the device is stopped, the sealer disks 5a are further separated in the second step to more reliably prevent the heat-shrinkable film 4a from being damaged by the heat of the sealer disks 5a. Has the advantage of being able to do so.

[0040]

As described above, according to the present invention, the sequentially conveyed packages are continuously wrapped with the heat-shrinkable film, and the heat-shrinkable film containing the package is polymerized. In an automatic packaging apparatus having a pair of sealer discs for performing vertical fusing sealing along the transport direction of the object to be packaged, the vertical sealer is connected to each of the heat shrinkable films to form the part. Since the clamping pressure by the sealer disk can be increased according to the seam state or thickness of the joint to be formed, the transfer speed of the heat-shrinkable film can be increased even when the thickness of the joint formed at one portion increases. The optimum thickness according to the increased thickness only at the moment when the joint passes between the sealer disks without constantly changing the sealer disk and without applying excessive clamping pressure that may cause wear and damage to the sealer disk Heat shrink due to clamping pressure It is possible to continuously discharge the excess heat-shrink film cut while applying a reliable longitudinal fusing seal to one part of the lum as scrap, and to reliably continuously wind the discharged scrap via a winding device. This makes it possible to continuously produce packaging products using heat-shrinkable films without lowering the production efficiency of the packaging products and avoiding the causes that may lead to breakage of the sealer disk of the equipment. Therefore, there is a special effect that the operation rate of the apparatus can be improved without stopping the apparatus.

Further, if the vertical sealer can increase or decrease the clamping pressure of the joint by the sealer disk via an electric signal output from a detection sensor for detecting the seam state or thickness of the joint, the longitudinal fusing is performed. Even if the thickness of the joint part of the heat-shrinkable film to be sealed where the polymerization is superimposed is different from each other or the joints are at irregular intervals, the heat-shrinkable film always has the optimum clamping pressure according to the thickness of the joint. The surplus heat-shrinkable film cut while applying a reliable longitudinal fusing seal to one part can be continuously discharged as scrap, and the discharged scrap can be surely continuously wound through a winding device. Therefore, there is an effect on manufacturing that a packaging product using the heat shrinkable film can be easily and continuously produced on an automated continuous production line.

Further, a two-step operation of a first step in which each of the pair of sealer disks is slightly separated when the apparatus is stopped, and a second step in which the pair of sealer disks are further separated when the start signal is not input within a predetermined time after the apparatus is stopped. When performing the operation, when the apparatus is stopped, not only can the heat-shrinkable film be instantaneously prevented from being damaged by the heat of the sealer disk, but also a start signal is input within a predetermined time after the apparatus is stopped. In this case, each of the sealer disks slightly separated in the first step can be closed instantaneously in a short time, thereby shortening the time required to start the vertical fusing and sealing process required at the time of restarting the apparatus, thereby reducing the production efficiency. Not only has the production advantage of minimizing the decline,
If the start signal is not input within a predetermined time after the device is stopped, it is possible to more reliably prevent damage to the heat-shrinkable film due to heat of the sealer disk by further separating the respective sealer disks in the second step. This has a special effect that an extremely excellent automatic packaging device can be provided.

[Brief description of the drawings]

FIG. 1 is a partially omitted partial configuration diagram in the vicinity of a vertical sealer of an automatic packaging device according to an embodiment of the present invention.

FIG. 2 is a partially omitted partial configuration view showing another embodiment of the automatic packaging apparatus of the present invention.

FIG. 3 is a partially omitted overall configuration diagram showing a conventional automatic packaging apparatus.

4 shows a packaging state of a body to be packaged in a conventional automatic packaging apparatus, and FIG.
(B) and (c) are partially omitted plan views of the vertical sealer.

FIG. 5 is a view showing a part of a heat-shrinkable film in a conventional automatic packaging apparatus where a heat-shrinkable film is superimposed, and FIGS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Automatic packaging apparatus 2 ... Supply conveyor 3 ... Packed object 4 ... Bag making machine 4a ... Heat shrink film 5 ... Vertical sealer 6 ... Transfer conveyor 6a ... Upper feed conveyor 6b ... Lower feed conveyor 7 ... Horizontal sealer 8 ... Discharge conveyor 9. Shrink tunnel

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E051 AA03 AB05 BA01 CA08 DA06 EA03 EB04 EB06 FB02 FD01 HA02 HA09 HE01 JA02 JA06 KA03 KA07 KB01 LA04 LA09 LB03 3E094 AA12 BA11 CA02 CA08 CA10 DA07 DA08 EA04 FA13 GA11 HA03

Claims (3)

[Claims] 1. A package (3) successively conveyed is continuously covered with a heat-shrinkable film (4a), and the package (3) is
(3) encapsulating the heat-shrinkable film (4a)
b) In an automatic packaging apparatus having a pair of sealer discs (5a) for longitudinally fusing and sealing along the transport direction of the packaged object (3), the vertical sealer (5) is an individual heat shrinkable film.
By joining (4a), the joining portion (4
An automatic packaging apparatus characterized in that the clamping pressure by the sealer disk (5a) can be increased according to the seam state or thickness of c). The vertical sealer (5) is provided with a sealer disk (5).
a) the clamping pressure of the joint (4c) according to (a) can be increased or decreased via an electric signal output from a detection sensor (10) for detecting the joint state or thickness of the joint (4c). The automatic packaging device according to claim 1, wherein 3. A first step in which each of the pair of sealer disks (5a) is slightly separated when the apparatus is stopped, and a second step in which each is further separated when a start signal is not input within a predetermined time after the apparatus is stopped. 3. The automatic packaging apparatus according to claim 1, wherein the automatic packaging apparatus is configured to perform a two-stage operation.