JPH08175525A - Heater temperature controller of packaging machine - Google Patents

Abstract

PURPOSE: To dispense with fine adjustment of a movable heater temperature by a manual operation and to prevent rapid wear and tear of a movable heater. CONSTITUTION: In a packaging machine according to the invention, upper and lower webs continuously supplied and an article set between the webs to be packaged are transported by a lower conveyor, a movable heater mounted on an upper conveyor moving in synchronism with the lower conveyor so as to move toward the lower conveyor is brought into contact with the webs between the articles to be packaged, and the webs are fused and cut. Therefore, the packaging machine comprises a feeding means 7 carrying an electric current to the movable heater, a dummy heater 5 connected to the feeding means 7 through a current-carrying condition setting device 11, a temperature detecting means 6 for the dummy heater 5, and a control means 1 controlling the temperature of the movable heater by arithmetically correcting a voltage to the movable heater to an optimum value on the basis of a temperature detection signal from the temperature detecting means 6 and outputting the result to the feeding means 7.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, upper and lower webs that are continuously supplied sandwich and move an article to be packaged, and a moving heater is moved in the same direction in synchronization with the web and the article to be packaged. Is moved in the direction of the web and brought into contact with the web between the articles to be packaged so that the web is fused and cut by the heat of the moving heater. The temperature of the moving heater is controlled by the energizing time of the moving heater corresponding to a predetermined value determined by the feedback temperature of the dummy heater obtained according to the speed.

However, when the operating time of the packaging machine reaches a certain time, the temperature of the dummy heater does not reach an appropriate temperature. Therefore, the temperature of the dummy heater is ignored, and the energization time is calculated by a predetermined calculation method. The temperature of the moving heater was controlled.

[0004]

The heater temperature control device of the conventional packaging machine has the following problems. That is, (1) Since there is a difference between the data and the actual cooling effect due to the temperature change of the outside air, the temperature of the moving heater needs to be finely adjusted manually. (2) In the case of a moving heater (cut heater) that cuts the web, the temperature of the moving heater is set to a temperature higher than the optimum temperature to cut the web. However, there is a problem that the moving heater is rapidly consumed.

The present invention is proposed in view of the above problems, and an object of the present invention is to eliminate the need for manual fine adjustment of the temperature of the moving heater and to prevent rapid consumption of the moving heater. A point is to provide a heater temperature control device for a machine.

[0006]

In order to achieve the above object, the present invention conveys continuously supplied upper and lower webs and an article to be packaged sandwiched by the respective webs by a lower conveyor. In a packaging machine for contacting a web between the articles to be packaged with a moving heater attached to the upper conveyor, which moves in synchronization with the lower conveyor, so as to move in the lower conveyor direction, and fusing and cutting the web. A feeding means for energizing the moving heater, a dummy heater connected to the feeding means via an energization condition setting device, a temperature detecting means for the dummy heater, and a moving heater for the moving heater based on a temperature detection signal from the temperature detecting means. And a control means for controlling the temperature of the moving heater by correcting the voltage to an optimum value and outputting the result to the power feeding means.

[0007]

The heater temperature control device of the packaging machine of the present invention is configured as described above, and it is configured to feed the upper and lower webs continuously supplied by the lower conveyor and the article to be packaged sandwiched by the respective webs. While moving for each station, the moving heater attached to the upper conveyor that moves in synchronization with the lower conveyor is moved in the direction of the lower conveyor to bring it into contact with the web between the items to be packaged and fuse them. When cutting and packaging the article to be packaged with the web, power is supplied to the moving heater from the power supply means and to the dummy heater via the power supply condition setting device from the power supply means to detect the temperature of the dummy heater. The temperature detection signal obtained at that time is sent to the control means, where the voltage for the moving heater is corrected to an optimum value based on the temperature detection signal, and the temperature is detected. The results are output to the power supply means, to control the temperature of the moving heater, to prevent the rise too much temperature during movement heater preheating.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A heater temperature control device for a packaging machine according to the present invention will be described below with reference to an embodiment shown in FIGS.
Shows the present heater temperature control device, FIG. 2 shows the outline of the packaging machine, FIG. 3 shows the details of the packaging machine, and FIG.
The cam floor and the cam guide groove are shown, and FIG. 5 is a flowchart of the heater temperature control device.

In FIG. 1, 1 is control means, 2 is an input / output section of the control means 1, 3 is an input module of the input / output section 2, 4 is an output module of the input / output section 2, 5 is a dummy heater, and 6 is The dummy heater 5 has a temperature detecting means, 7 is a power feeding means, 9 is a moving heater, 8 is a power feeding portion of the moving heater 9, 10 is a mechanical timing detecting means, and 11 is an energization condition setting device for setting energization conditions. 7 is connected to the power feeding portion 8 of the moving heater 9, and the power feeding means 7 is connected to the dummy heater 5 via the energization condition setting device 11.

Further, the temperature detection signal detected by the temperature detection means 6 of the dummy heater 5 is input to the control means 1 through the input module 3 → the input / output section 2, and the control means 1 moves the heater 9 based on the temperature detection signal. The optimum value of the voltage for is corrected and calculated, and the result is output to the power feeding means 7 via the input / output unit 2 → output module 4. Further, the electricity is supplied from the power feeding means 7 to the dummy heater 5 and the power feeding portion 8 of the moving heater 9 by a timing signal from the mechanical timing detecting means 10 to the power feeding means 7.

In FIG. 2, 20 is a continuously fed upper web, 21 is a continuously fed lower web, 22-25.
Is a rotary shaft, 26 is a drive sprocket fixed to the rotary shaft 22, 27 is a pair of drive sprockets fixed to both ends of the rotary shaft 22, 28 is a drive sprocket fixed to the rotary shaft 24, and 29 is a rotary sprocket. A pair of drive sprockets fixed to both ends, a pair of driven sprockets 30 fixed to both ends of the rotary shaft 23, a pair of driven sprockets 31 fixed to both ends of the rotary shaft 25, and 32 each of the drive sprockets 27. A pair of upper endless chains suspended between the driven sprockets 30 and a pair of lower endless chains 33 suspended between the drive sprockets 29 and the driven sprockets 31.

Reference numeral 50 is a motor, 51 is a speed reducer, 52 is a coupling, 53 is a gear box, 54 is a drive sprocket mounted on the output shaft of the gear box 3, 55 is the drive sprocket 54, the drive sprocket 28 and the above. An endless chain suspended between the drive sprocket 26,
The rotation of the motor 50 is transmitted to the lower endless chain 33 and the upper endless chain 32 via the speed reducer 51 → the coupling 52 → the gear box 53 → the drive sprockets 54, 28 and 26, and the endless chains 33 and 32 are circulated and moved. It is designed to let you.

Reference numeral 34 in FIGS. 3 and 4 is the endless chain 3 described above.
Support members attached at both ends at fixed intervals of 2, 35, 3
Reference numeral 5 is a parallel guide rod having both ends fixed to the respective support members 34, 36 is a central cam floor attached to the central portion of each guide rod 35, and 37 and 37 are left and right across the respective guide rods 35. Left and right sliding members that are slidably inserted in the respective directions, 38 left and right cam floors attached to the respective sliding members 37, 39a in FIG. 5 is a straight guide groove for guiding the central cam floor 36, 39b, 39b is the left and right cam floor 3
It is a guide groove for left and right movement that guides 8, 38 so as to be able to move left and right.

40 is a left and right link, 41 is a pin for pivotally supporting the upper ends of the left and right links 40 on the left and right sliding members 37, 42 is a seal bar, and 43 is a movement attached to the lower surface of the seal bar 42. A heater, 44 is a pin that pivotally supports the lower ends of the left and right links 40 to both ends of the seal bar 42,
Reference numeral 45 is a brush for supplying power to the movable heater 43 attached to the left and right ends of the seal bar 42.
When the seal bar 42 and the moving heater 43 move downward, the guide grooves 37, 3 for left and right movement are moved.
7, the left and right cam floors 38 move relatively apart, the left and right links 40 swing downward about the pin 41, and the seal bar 42 and the moving heater 43 descend. When the endless chains 32 circulate and move, and the seal bar 42 and the moving heater 43 move upward, the left and right movement guide grooves 39b, 39b cause the left and right cam floors 38 to move relatively closer to each other. The left and right links 40 swing upward about the pin 41, and the seal bar 42 and the moving heater 43 move up.

Reference numeral 46 in FIG. 3 denotes a plurality of metal rods having both ends attached to the lower endless chain 33 corresponding to the seal bars 42 and the movable heaters 43, and reference numeral 48 denotes each metal rod via an elastic body 47. The upper and lower webs 20 and 21 continuously supplied by the seal bar receiver attached to the same 46
The lower endless chain 33 conveys the packaged product 24 sandwiched by 0 and 21 and moves in the direction of the lower endless chain 33 to the upper endless chain 32 which moves in synchronization with the lower endless chain 33. The moving heater 43 attached to the above is brought into contact with the webs 20 and 21 between the articles to be packaged 24 to fuse and cut. At this time, the lower sides of the webs 20 and 21 are supported by the metal rod 46 attached to the lower endless chain 33.

Next, the operation of the heater temperature control device of the packaging machine shown in FIGS. 1 to 4 will be specifically described. Upper and lower webs 2 continuously supplied by the lower endless chain 33
The moving heater 43 attached to the upper endless chain 32 that moves in synchronization with the lower endless chain 33 while moving 0 and 21 and the article to be packaged 24 sandwiched by the respective webs 20 and 21 for each station. The lower endless chain 33
The web 2 between the articles 24 to be packed.
When the article 24 to be packaged is brought into contact with 0, 21 to be fused and cut, and the packaged article 24 is wrapped with the webs 20, 21, electricity is supplied from the power feeding means 7 to the moving heater 40, and the current feeding condition setting device is supplied from the power feeding means 7. The dummy heater 5 is energized via 11, the temperature of the dummy heater 5 is detected by the temperature detection means 6 of the dummy heater 5, and the temperature detection signal obtained at that time is sent to the control means 1 where it is moved based on the temperature detection signal. The voltage for the heater 43 is corrected and calculated to an optimum value, the result is output to the power supply means 7, and the temperature of the moving heater 43 is controlled to prevent the temperature of the moving heater 43 from preheating too much. The flow chart of this heater temperature control device is shown in FIG.

[0017]

As described above, the heater temperature control device for a packaging machine according to the present invention includes the upper and lower webs continuously supplied by the lower conveyor and the articles to be packaged sandwiched by the respective webs for each station. On the other hand, while moving to the lower conveyor, the moving heater attached to the upper conveyor that moves in synchronization with the lower conveyor is moved in the direction of the lower conveyor to contact the web between the items to be packaged, fuse and cut together. When a packaged product is packaged on the web, power is supplied from the power supply unit to the moving heater, and the dummy heater is supplied from the power supply unit via the power supply condition setting unit, and the temperature of the dummy heater is detected by the dummy heater temperature detection unit. Then, the temperature detection signal obtained at that time is sent to the control means, where the voltage for the moving heater is corrected to an optimum value based on the temperature detection signal, and the result is increased. The temperature of the moving heater is controlled by controlling the temperature of the moving heater by outputting it to the power supply means to prevent the temperature of the moving heater from rising too high. Therefore, it is possible to eliminate the need for manual fine adjustment of the moving heater temperature, and to rapidly wear the moving heater. Can be prevented.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a heater temperature control device for a packaging machine according to the present invention.

FIG. 2A is a side view of a packaging machine to which the heater temperature control device is applied, and FIG. 2B is a front view thereof.

FIG. 3 is a plan view of the packaging machine.

FIG. 4 is a front view of the packaging machine.

FIG. 5 is a front view showing a cam floor of the packaging machine.

FIG. 6 is a flow chart of the heater temperature control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control means 2 Input / output part of control means 1 3 Input module of input / output part 2 of control means 4 Output module of input / output part 2 of control means 5 Dummy heater 6 Temperature detection means of dummy heater 5 Power supply means 8 Moving heater 9 power feeding unit 9 moving heater 10 machine timing detection means 11 energization condition setter for setting energization conditions

Claims (1)

[Claims] 1. A lower conveyor conveys continuously supplied upper and lower webs and a product to be packaged sandwiched by the respective webs by a lower conveyor, and an upper conveyor that moves in synchronization with the lower conveyor. In a packaging machine for contacting a moving heater mounted so as to be movable in a direction with the web between the articles to be packaged, fusing and cutting the same, a feeding means for energizing the moving heater and an energizing condition for the feeding means. A dummy heater connected via a setting device, a temperature detecting means of the dummy heater, and a voltage for a moving heater are corrected and calculated to an optimum value based on a temperature detection signal from the temperature detecting means, and the result is output to the power feeding means. And a controller for controlling the temperature of the moving heater.