JP3297077B2 - Seal packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal packaging machine.
In particular, the present invention relates to a seal packaging machine capable of detecting a defective seal, synchronizing control of cutting means, and controlling defective product removing means by detecting a temperature due to residual heat of a seal portion after heat sealing. Things.

[0002]

2. Description of the Related Art An example of a conventional seal packaging machine is shown in FIG.

In FIG. 1, reference numeral 10 denotes a first rotating body, which is provided with a chute 11 for filling contents and a heat seal bar 12 on its circumference. Reference numeral 20 denotes a second rotating body, which is provided with a quantity mass 21 on the circumference thereof. The first rotating body 10 and the second rotating body 20 are arranged so that a part of the circumference thereof overlaps, and the overlapping portion forms a filling section A. B in the drawing is a seal section.

[0004] The film 30 is supplied to the first rotating body 10 in a folded state, and the contents are filled in the filling section A while the vertical seal 31 (see FIG. 2) is formed by the heat seal bar 12. You. Thereafter, after passing the seal section B, a horizontal seal 32 (see FIG. 2) is formed by a horizontal roll 42 via a folding roller 40 and a preheating bar 41, and a cutter blade (sewing machine blade) 43 and a cutter receiving blade 44 form a vertical seal portion. A perforation 33 (see FIG. 2) is inserted into the package 34.
Is completed, and a package body row 35 connected by a seal portion is completed (see FIG. 2). The horizontal roll 42 also plays a role as a transfer unit that transfers and drives the package row 35.

[0005]

PROBLEM TO BE SOLVED [ Problem 1 ] In the seal packaging machine as described above, a seal failure may occur due to a variation in the temperature or pressure of the heat seal bar 12, or the like.

Conventionally, such inspection for defective sealing has been performed manually. However, in recent years, the speed of seal packaging machines has been increasing, so that it is virtually impossible for all products to be inspected manually and only for sampling inspections.As a result, there is a problem that defective products may be mixed in products. Has occurred.

A first object of the present invention is to solve such a problem and to provide a seal packaging machine capable of automatically detecting a defective seal.

Problem 2

Further, in the conventional seal packaging machine as described above, there is a problem that the rotational speed of the cutter blade 43 and the cutter receiving blade 44 and the transfer speed of the package row gradually shift. If this is left, the perforation 33 will not enter the center of the vertical seal portion, and in the worst case, the package 3
4 may be perforated.

Therefore, conventionally, an operator always or regularly checks the position of a perforation, and when a position shift occurs, the rotation speed of the cutter blade 43 and the cutter receiving blade 44 or the rotation speed of the horizontal roll 42 is manually adjusted. However, there is a problem that this adjustment work is complicated.

A second object of the present invention is to solve such a problem and to automatically adjust the operation of a cutting means such as a cutter in synchronization with the transfer speed of a row of packaging bodies. Is to provide. Another object of the present invention is to provide a seal packaging machine capable of automatically adjusting a transfer speed of a package body row.

Problem 3

A third object of the present invention is to provide a seal packaging machine capable of automatically rejecting defective products by automatically detecting a defective seal.

[0014]

According to a first aspect of the present invention, there is provided a seal packaging machine, comprising: a temperature detecting sensor for detecting a temperature due to residual heat of a seal portion after heat sealing; When the temperature of the seal portion input from the temperature detection sensor is out of a predetermined temperature range,
A controller for transmitting a seal failure signal.

Here, the "temperature range" refers to the residual heat of the sealing portion when reliable heat sealing is performed in accordance with the seal packaging machine, packaging material, contents and other conditions to which the present invention is applied. It is determined by setting the upper and lower limits of the temperature in advance.

According to a third aspect of the present invention, there is provided a seal packing machine for cutting the seal portion of a row of packages which are connected and transferred by a heat-sealed seal portion. A seal packaging machine provided with a cutting means, comprising: a temperature detection sensor that continuously detects a temperature due to residual heat of a sealing portion of the package body row; and a cycle of a temperature signal input from the temperature detection sensor. A controller for controlling the operation of the cutting means. According to a fourth aspect of the present invention, there is provided a seal packaging machine for cutting a seal row of a package row which is connected and transported by a seal section after heat sealing, and transferring the package row more than the cutting means. A sealing means provided with a transfer means for transferring and driving the package row on the upstream side in the direction, wherein a temperature detection sensor for continuously detecting the temperature due to residual heat of the sealing portion of the package row, A controller for controlling the operation of the transfer means based on the cycle of the temperature signal input from the temperature detection sensor. It should be noted that “cutting” here includes not only dividing the seal portion but also making a cut such as a perforation.

Further, in order to achieve the third object, the seal packaging machine according to claim 6 continuously detects the temperature of the package row which is connected and transferred by the seal portion after heat sealing. The residual heat of the seal
A temperature detecting sensor for detecting the temperature that can be eliminated with cutting means for cutting the individual package by cutting the seal portion after the temperature detected by the temperature detection sensor, a shed package from the transfer line When the temperature of the seal portion detected by the temperature detection sensor is out of a predetermined temperature range, a controller that operates the rejection unit at a predetermined timing is provided.

Note that the "temperature range" here also refers to the residual amount of the seal portion when reliable heat sealing is performed according to the seal packaging machine, packaging material, contents and other conditions to which the present invention is applied. It is determined by setting the upper and lower limits of the temperature due to heat in advance.

[0019]

[Effects] The seal packaging machine having the above configuration has the following effects.

According to the seal packaging machine of the first aspect, the temperature due to the residual heat of the seal portion is detected by the temperature detection sensor. The detected temperature is input to the controller. When the input temperature is out of the predetermined temperature range, the controller sends a seal failure signal. Since the temperature range is defined by the upper limit and the lower limit of the temperature due to the residual heat of the seal portion when reliable heat sealing is performed, a defective seal signal is transmitted when a defective heat seal occurs.

Therefore, according to the present invention, an effect is obtained that a seal failure can be automatically detected.

According to the third aspect of the present invention, the temperature detecting sensor detects the residual heat of the seal portion of the package body row .
That the temperature is continuously detected. The detected temperature is input to the controller. The temperature of the row of packages that are connected and transported by the seal section after heat sealing is high in the seal section and low in the other sections. The height is repeated according to the transfer speed passing through the sensor unit. The controller controls the operation of the cutting means based on the cycle of the temperature signal input from the temperature detection sensor in this way. According to the fourth aspect of the present invention, the operation of the transfer means of the package row is controlled based on the cycle of the temperature signal input from the temperature detection sensor.

Therefore, according to these inventions, it is possible to synchronize the operation of the cutting means with the transfer speed of the package row, and it is possible to obtain an effect that the cutting position can be automatically adjusted.

According to the seal wrapping machine of the sixth aspect, the temperature of the row of wrapping bodies is continuously detected by the temperature detection sensor, so that the temperature due to the residual heat of the seal portion is detected. The detected temperature is input to the controller. On the other hand, the package body for which the temperature has been detected by the temperature detection sensor has its seal portion cut by the cutting means and is divided into individual packages. The controller activates the elimination means at a predetermined timing when the temperature of the seal portion detected by the temperature detection sensor is out of a predetermined temperature range. The temperature range is defined by the upper and lower limits of the temperature due to the residual heat of the seal portion when reliable heat sealing is performed, so that when heat sealing failure occurs, the elimination means operates at a predetermined timing. As a result, of the divided packages, only those having poor sealing are excluded.

Therefore, according to the present invention, an effect is obtained that defective products can be automatically eliminated.

[0026]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing one embodiment of a seal packaging machine according to the present invention, and FIG. 2 is a view as viewed from II in FIG.
In these figures, the same parts as those of the prior art shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, reference numerals 51, 52, and 53 denote temperature detection sensors, and reference numeral 60 denotes a controller.

Each of the temperature detection sensors 51, 52 and 53 is constituted by a non-contact type infrared temperature sensor. Each of these sensors is for detecting the temperature due to the residual heat of the seal portion after heat sealing. FIG.
As shown in the figure, the temperature detection sensor 51 is arranged to detect the temperature of the horizontal seal portion 32, and the temperature detection sensors 52 and 53 detect the temperatures of the upper and lower ends of the vertical seal portion 31. It is arranged so that it can be. These temperature detection sensors 51, 52 and 53 send the detected temperatures to the controller 60 as temperature signals S1, S2 and S3.

FIGS. 3A, 3B and 3C show specific examples (experimental examples) of the temperature signals S1, S2 and S3 from the temperature detection sensors 51, 52 and 53 input to the controller 60. FIG. Since the temperature detection sensor 51 continuously detects the temperature of the horizontal seal portion 32 of the package body row 35 as shown in FIG. 2, the temperature signal S1 has a slight variation as shown in FIG. However, when a normal horizontal seal is performed, the temperature falls within a temperature range of 90 to 135 ° C. As shown in FIG. 2, the temperature detection sensors 52 and 53 alternately detect the temperatures of the vertical seal portion 31 and the non-seal portion 36 of the package row 35, and the temperature signals S2 and S3 are shown in FIG.
As shown in (c), the height of the package row 35 is repeated with a relatively large amplitude in accordance with the transfer speed at which the package row 35 passes through the temperature detection sensor unit. The peaks S21 and S31 of the signal are the temperatures of the upper and lower portions of the vertical seal portion 31, and the valley S22
And S32 are the upper and lower temperatures of the non-sealed portion 34. Although there is some variation, when normal vertical sealing is performed, the temperature due to the residual heat of the vertical sealing portion falls within a temperature range of 90 to 100 ° C.

The controller 60 includes the temperature detection sensor 5
When the temperature of the seal portion inputted from S1, S52, S53 as the temperature signals S1, S2, S3 is out of a predetermined temperature range, a seal failure signal S4 is transmitted. In this embodiment, the upper limit of the temperature range is set to 135 ° C. for the horizontal seal portion, 100 ° C. for the vertical seal portion, and the lower limit is set to 90 ° C. for both the horizontal seal portion and the vertical seal portion. . An alarm lamp 61 and a buzzer 62 are connected to the controller 60, and when the seal failure signal S4 from the controller 60 is input, the lamp is turned on and the buzzer sounds.

More specifically, the controller 60
Is the seal failure signal S in the following cases (a), (b), and (c).
4 is sent.

(A) When the temperature due to the residual heat of the horizontal seal portion 32 detected by the temperature detection sensor 51 exceeds the upper limit temperature of 135 ° C. as indicated by the imaginary line S1 ′ in FIG. Alternatively, as shown by a virtual line S1 '', the lower limit temperature 90
When the temperature falls below C.

(B) When the temperature at the upper end of the vertical seal portion 31 detected by the temperature detection sensor 52 exceeds the upper limit temperature of 100 ° C. as shown by a virtual line S21 ′ in FIG. 3B. Alternatively, as shown by a virtual line S21 ″, the lower limit temperature 9
When it becomes 0 degrees C or less.

(C) When the temperature at the lower end of the vertical seal portion 31 detected by the temperature detection sensor 53 exceeds the upper limit temperature of 100 ° C. as indicated by a virtual line S31 ′ in FIG. 3C. Alternatively, as shown by a virtual line S31 ″, the lower limit temperature 9
When it becomes 0 degrees C or less.

Numeral 70 denotes a cutting means, which comprises a rotary cutter blade 71 and a cutter receiving blade 72.
The cutting means 70 is for cutting the vertical seal portion 31 of the package body row 35 to divide it into individual packages 34, and the operation thereof is controlled by the controller 60. The controller 60 controls the operation of the cutting means 70 based on the cycle of the temperature signal S3 input from the temperature detection sensor 53 that detects the temperature at the lower end of the temperature detection sensors 52 and 53 of the vertical seal portion. Various methods can be adopted as the control method. For example, the temperature signal S3
May exceed 80 degrees C (or fall below), and the rotation of the cutter blade 71 and the cutter receiving blade 72 may be synchronized, or the timing of the signal peak S31 (at the time when the temperature changes from rising to falling) and the cutting edge The rotation of the cutter blade 71 and the cutter receiving blade 72 may be synchronized. Valley part S3
The control may be performed at the timing of 2. In FIG. 1, S5 indicates a control signal of the cutting means 70. Instead of controlling the operation of the cutting means 70 (or together with the control of the cutting means 70), the rotation speed of the horizontal roll 42 'is controlled by the feedback control based on the cycle of the temperature signal S3, and the transfer of the package row 35 is performed. The speed may be kept constant. In the present embodiment, the operation of the cutting means 70 is controlled based on the temperature signal S3 input from the temperature detection sensor 53 that detects the temperature at the lower end of the temperature detection sensors 52 and 53 of the vertical seal portion. This is because the signal S2 of the temperature detection sensor 52 at the upper end is easily affected by the residual heat of the horizontal seal portion 32, as can be seen from the comparison between FIGS. 3B and 3C. On the other hand, the signal S3 of the temperature detection sensor 53 at the lower end is stable without being affected and has a large amplitude.

Numeral 80 denotes an elimination means, which is constituted by an air injection nozzle or a solenoid. The exclusion means 80
This is for removing the poorly sealed package 34 ′ from the transfer line among the packages 34 individually cut by the cutting means 70, and the operation thereof is controlled by the controller 60. The controller 60 includes the temperature detection sensors 51 and 5
When the temperature of the seal portion inputted as the temperature signals S1, S2, S3 from the temperature sensors 2, 53 falls outside the above-mentioned predetermined temperature range, the excluding means 80 is driven at a predetermined timing. I have. In FIG. 1, S6 is a drive signal for driving the elimination means. The timing for driving the exclusion unit 80 is set based on the transfer speed of the package, and is set, for example, by the time from when the package passes through the temperature detection sensors 52 and 53 to when the package reaches the exclusion unit 80.

Next, a series of operations of the above-described seal packaging machine will be described.

Up to the point where the horizontal seal 32 is formed by the horizontal roll 42, it is the same as the conventional one shown in FIG.

After the horizontal seal 32 is formed, the package row 35
The temperature of the horizontal seal portion 32 and the vertical seal portion 31 due to residual heat is detected by the temperature detection sensors 51, 52, and 53. The temperatures S1, S2, S3 detected by the temperature detection sensors 51, 52, 53 are input to the controller 60. The controller 60 synchronizes the transfer of the package body row 35 with the rotation of the cutter blade 71 and the cutter receiving blade 72 based on the cycle of the signal from the temperature detection sensor 53.
Alternatively, the transfer speed of the package row 35 is controlled to be kept constant. Thus, the cutting position of the package body row 35 is automatically adjusted, and the package body row 35 is cut at substantially the center of the vertical seal portion 31. Further, when at least one of the temperatures S1, S2, S3 detected by the temperature detection sensors 51, 52, 53 falls outside the preset temperature range, the controller 6 is turned off.
0 sends out the seal failure signal S4 to operate the lamp 61 and the buzzer 62. As a result, it is possible to notify the worker that the sealing failure has occurred. Further, in this case, the drive signal S6 of the elimination means is transmitted with a delay of a predetermined timing, whereby the elimination means 80 is operated, and the poorly sealed package 34 'is eliminated outside the transfer line.

As described above, according to the seal packaging machine of the present embodiment, it is possible to automatically detect a defective seal, and to automatically adjust the cutting position of the package row 35. Defective products can be automatically eliminated.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the present invention.

For example, in a case where the exclusion means 80 is not provided, the cutting means 70 may be provided with perforations without dividing the package row. As the cutting means, not only a rotary type but also one in which a cutter reciprocates can be used. Signals for controlling the operation of the cutting means 70 include:
The signal S2 of the temperature detection sensor 52 may be used. The present invention is not limited to the seal wrapping machine of the type shown in FIG. 4, but can be widely applied to other types of seal wrapping machines.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a seal packaging machine according to the present invention.

FIG. 2 is a II view in FIG. 1;

FIGS. 3A, 3B, and 3C are explanatory diagrams of the operation.

FIG. 4 is a schematic view of a conventional seal packaging machine.

[Explanation of symbols]

 Reference Signs List 31 vertical seal part 32 horizontal seal part 34 package 35 package row 51 temperature detection sensor 52 temperature detection sensor 53 temperature detection sensor 60 controller 70 cutting means 80 rejection means

Continued on the front page (56) References JP-A-63-82929 (JP, A) JP-A-62-95510 (JP, U) JP-A-61-91884 (JP, U) JP-A-54-30660 (JP) , U) Actually open 52-95768 (JP, U) Actually open 1980-55 (JP, U) Actually open 60-60,706 (JP, U) Actually open 2-87709 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65B 51/10-51/30 B65B 57/00 B29C 65/02-65/46

Claims (6)

(57) [Claims] 1. A temperature detection sensor for detecting a temperature due to residual heat of a seal portion after heat sealing, and when a temperature of the seal portion input from the temperature detection sensor is out of a predetermined temperature range. And a controller for transmitting a seal failure signal. 2. The temperature detecting sensor according to claim 1, wherein the temperature detecting sensor detects a temperature of the seal portion by continuously detecting a temperature of a row of packages that are connected and transferred by the seal portion after heat sealing. The seal packaging machine according to claim 1. 3. A seal packaging machine having a cutting means for cutting the sealing portion of the package row which is transported continuously connected by the seal portion after being heat-sealed, the sealed portion of the packaging sequence A seal package comprising: a temperature detection sensor that continuously detects a temperature due to residual heat; and a controller that controls the operation of the cutting unit based on a cycle of a temperature signal input from the temperature detection sensor. Machine. 4. A cutting means for cutting said seal portion of a package row which is connected and transported by a seal section after heat sealing, and a package which is located upstream of said cutting means in a package row transport direction and said packaging means. And a transfer means for transferring and driving the body row, the seal packing machine comprising :
A seal package comprising: a temperature detection sensor that continuously detects a temperature due to residual heat; and a controller that controls an operation of the transfer unit based on a cycle of a temperature signal input from the temperature detection sensor. Machine. 5. The seal packaging machine according to claim 4, wherein said transfer means is a horizontal roll for performing a horizontal seal along a transfer direction of the package body row. 6. A temperature detecting sensor for continuously detecting the temperature of a row of packages that are connected and transferred by a seal portion after heat sealing, thereby detecting a temperature due to residual heat of the seal portion, Cutting means for cutting the seal portion after the temperature is detected by the detection sensor to divide it into individual packages, exclusion means for removing the divided packages from the transfer line, and detection by the temperature detection sensor A seal packaging machine comprising: a controller that activates the removing means at a predetermined timing when the temperature of the seal portion is out of a predetermined temperature range.