Horizontal rotary automatic filling and packaging machine

Abstract

To reduce occurrence of defective products of packaging bags by more accurately controlling a temperature of a side sealer with a simple, low-cost and highly-reliable configuration.SOLUTION: A horizontal rotary automatic filling and packaging machine 1 comprises a side seal device 7, a filling chute 8, a turn table 20, a top seal device 12, a conveyance device 14, and a temperature controller 17 for controlling a sealing temperature of the side seal device. The side seal device 7 comprises: a plurality of side sealers; heaters provided respectively at the plurality of side sealers; a first temperature sensor provided at least at one of the plurality of side sealers; and a second temperature sensor for detecting a seal surface temperature of the plurality of side sealers in a non-contact manner.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an improved technology of a horizontal rotary type automatic filling and packaging machine for manufacturing a packaged product by dividing a long packaging film (resin film) conveyed horizontally into a number of bag portions and filling each of the horizontally arranged bag portions with contents.

Background Art

[0002] Conventionally, among automatic filling and packaging machines for dividing and packaging contents such as powders measured in a fixed quantity into a number of packages using a long packaging film (resin film), there is a horizontal rotary type automatic filling and packaging machine.

[0003] In this horizontal rotary type automatic filling and packaging machine, for example, as described in Patent Document 1 and Patent Document 2, while pulling out and moving the packaging film horizontally from a film coil in which the packaging film and the like are wound around a core material, in the film guide portion, the packaging film is folded in two in a direction substantially orthogonal to the film traveling direction to form a portion that becomes the bottom of the bag portion, and the packaging film is introduced into a turntable.

[0004] A number of side sealers (side seal bars) concentrically arranged on the turntable are rotated at a speed synchronized with the introduced packaging film, and by sandwiching the packaging film from the vertical direction, a width seal (side seal: heat seal) extending in the vertical direction of the moving direction is formed for the packaging film moving (rotating) in the horizontal direction.

[0005] And between the successively folded packaging films (bag portions with an upper opening), a plurality of filling shoots arranged corresponding to between adjacent side seal bars and rotated in synchronization with the packaging film and the side sealer are inserted, and a predetermined quantity of contents (powder, granular matter) measured is filled (put in) from such filling shoots. Then, the filling shoot is removed from the bag portion, and the side sealer holding the resin film is removed.

[0006] The packaging film, with contents filled into each bag section in this manner, is then sealed by top sealing (heat sealing) the upper edges of the bags. In this state, the width-sealed portion between the bags is cut or perforated along the longitudinal direction to achieve the desired packaging form. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2003-341607 [Patent Document 2] Japanese Patent Publication No. 2006-124030 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] In conventional horizontal rotary automatic filling and packaging machines, the side sealer has a built-in heater (heating device) that is controlled to maintain a temperature suitable for side sealing. If the temperature is lower than a predetermined level, the adhesive portion of the film will not melt sufficiently, leading to a defective seal. On the other hand, if the temperature is higher than a predetermined level, the adhesive portion of the film will melt too much, also leading to a defective seal. Therefore, it is necessary to control the temperature of the side sealer so that it remains within a predetermined range.

[0009] Therefore, conventionally, the heating degree of the heater is controlled based on the temperature detection result from a temperature sensor (such as a thermocouple) embedded in the side sealer, so that the temperature of the side sealer falls within a predetermined range.

[0010] However, the side sealers are arranged in large numbers (for example, 10 to 40) at predetermined intervals in the circumferential direction coaxially with respect to the rotation center of the turntable, and it is necessary to perform heating by the heater and temperature detection by the temperature sensor while rotating in an integrated manner with the turntable. For this reason, the electrical connection (electrical wiring) between the frame side (main body side: fixed side) and the turntable (rotating side) of the packaging machine is configured to use rotating contacts (such as slip rings).

[0011] If we were to attempt to individually control the temperature (heating control) of numerous side sealers to ensure accurate temperature control, the number of rotating contacts would become extremely large, leading to space issues and a high risk of electrical wiring problems. Therefore, conventionally, to minimize the number of rotating contacts between the heater and temperature sensor, only one representative temperature sensor is used for each side seal, and the power supply circuit for heating control of the heaters is a common, identical circuit. As a result, temperature control of the side sealers has been sacrificed to some extent, considering the complexity of the configuration, reliability, and cost.

[0012] Therefore, while controlling the temperature of the side sealers using this conventional method, temperature variations may occur between individual side sealers due to slight differences or changes in the shape of the side sealers, differences in heat escape paths (differences in how heat is dissipated), or product variations in the heaters.

[0013] When such variations occur, if the temperature of some side sealers is lower than the set temperature (target temperature) (i.e., there is a large downward fluctuation), there is a risk that the packaging bags may become defective due to insufficient sealing of the packaging film and leakage of contents due to insufficient temperature. Furthermore, if the temperature of some side sealers is higher than the set temperature (target temperature) (i.e., if there is a large upward deviation), there is a risk that the packaging film may melt due to overheating, or that this may cause leakage of the product, resulting in defective packaging bags.

[0014] Even when operators perform temperature adjustments before starting operation (production), carefully and manually adjusting all side sealers to the correct temperature through visual inspection, the temperature would change during subsequent operation (production), resulting in temperature variations between side sealers that exceeded the specified limits. This led to defective packaging bags being produced, forcing the operation to be stopped, and thus preventing improvements in production efficiency.

[0015] This invention has been made in view of the above circumstances, and aims to provide a horizontal rotary type automatic filling and packaging machine that has a simple, low-cost, and reliable configuration, while being able to more accurately control the temperature of the side sealer, thereby reducing the occurrence of defective packaging bags. [Means for solving the problem]

[0016] Therefore, the horizontal rotary type automatic filling and packaging machine according to the present invention is A side sealing device that heat-seals a packaging film, which has its central portion folded while being transported horizontally, in the width direction, The aforementioned A filling chute for loading contents into packaging film bags separated by a side sealing device, It is configured to be able to rotate relative to the packaging machine body in a horizontal plane, The aforementioned Side seal device and The aforementioned A turntable that rotates the filling chute, A top sealing device that heat-seals the upper edge of the packaging film bag filled with contents, The aforementioned The side seal device is configured to include an operating panel that allows setting the sealing temperature, The aforementionedA temperature controller for controlling the sealing temperature of the side sealing device, A horizontal rotary automatic filling and packaging machine equipped with The side sealing device A plurality of side sealers arranged in a ring and performing a sealing operation on the packaging film, The aforementioned Heaters respectively provided for the plurality of side sealers, The aforementioned At least one of the plurality of side sealers, and a first temperature sensor that contacts the sealing surface of the side sealer and detects the sealing surface temperature, Disposed on the packaging machine main body side of the outer periphery of the turntable, The aforementioned A second temperature sensor that detects the sealing surface temperatures of the plurality of side sealers in a non-contact manner at a predetermined timing, And is equipped with The temperature controller The aforementioned The set temperature input from the operation panel is S0, The aforementioned By the first temperature sensor The aforementioned The detected temperature of the sealing surface of at least one side sealer is T1, The aforementioned By the second temperature sensor The plurality of side sealers The detected temperatures of the sealing surfaces of each side sealer are respectively H1 to HN (N = the number of set samples per cycle), For each predetermined cycle The aforementioned H1 to The aforementioned The minimum value of HN is HL, When From the start of operation until one cycle is completed, The aforementioned Taking S0 as the target temperature, The aforementioned T1 is The aforementioned To make it S0 The aforementioned For all of the plurality of side sealers The aforementioned The heaters are temperature-controlled in common as the same system, After the next cycle, every cycle The aforementioned From S0 The aforementioned [[ID=5x]]The correction value D1 obtained by subtracting HL is The aforementionedThe corrected target temperature S1 is calculated by adding it to S0. The aforementioned T1 The aforementioned So that it becomes S1 The aforementioned All of the multiple side sealers The aforementioned The heaters are controlled by a common temperature control system. It is characterized by the following:

[0018] In the present invention, the second temperature sensor can be characterized as an infrared thermometer. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a horizontal rotary automatic filling and packaging machine that has a simple, low-cost, and reliable configuration, while also enabling more precise temperature control of the side sealer, thereby reducing the occurrence of defective packaging bags. [Brief explanation of the drawing]

[0020] [Figure 1] (A) is a front view of a horizontal rotary type automatic filling and packaging machine according to one embodiment of the present invention, and (B) is a plan view showing the components on the turntable. [Figure 2] (A) is a front view of a side sealer (with a built-in first temperature sensor) according to the above embodiment, and (B) is a front view of a side sealer (without a first temperature sensor) according to the above embodiment, shown separately. [Figure 3] (A) is an example of a flowchart illustrating temperature control of the sealing surface of the side sealer according to the above embodiment. [Figure 4] (A) is a diagram showing an example of the monitor display (initial setup) of the control device (operation panel, temperature controller) according to the above embodiment, and (B) is a diagram showing an example of the monitor display (temperature correction control in progress) of the control device (operation panel, temperature controller) according to the above embodiment. [Modes for carrying out the invention]

[0021] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below.

[0022] First, the overall configuration of the horizontal rotary type automatic filling and packaging machine according to the present invention will be explained using Figure 1. Figure 1(A) is a front view (partially a cross-sectional view) of the horizontal rotary type automatic filling and packaging machine according to the present invention, and Figure 1(B) is a plan view of the packaging film transport path (turntable portion) as seen from above. As shown in Figure 1(A), the horizontal rotary automatic filling and packaging machine 1 is equipped with a packaging film roll support shaft (in use) 3, a spare packaging film roll support shaft (standby) 4, a packaging material feeding device 5, a packaging film folding guide (bag making guide) 6, a side sealing device (side sealing bar) 7, a filling chute 8, a contents storage hopper 9, a weighing device 10, a preheating device 11, a top sealing device 12, a notch device 13, a clamp conveying device 14, a cutter device 15, an discharge slide (discharge chute) 16, and an operation panel (control device: controller) 17. The side sealing device (side sealing bar) 7, the filling chute 8, etc., are mounted on a turntable 20 that rotates around a rotational center axis 20A relative to the main body 2 in a horizontal plane.

[0023] The packaging film is wound into a roll as a packaging film raw material roll F1 and supported on a packaging film raw material roll support shaft 3. In addition, the remaining portion of the packaging film raw material roll F1, which is a spare packaging film raw material roll F1', is supported on a packaging film raw material roll support shaft 4. Here, the packaging film is made of a transparent or translucent material, for example, a base film such as PET and a heat-seal film such as polyethylene having a lower melting point than the base film. Furthermore, the packaging film F1 may have a three-layer structure consisting of a base film, an intermediate film, and a heat-seal film.

[0024] The packaging film F2, drawn from the packaging film roll F1 supported by the packaging film roll support shaft 3, passes through the packaging material feeding device 5 and is then continuously fed to the right in Figure 1(A). The bag-making guide (packaging film folding guide) 6 folds the film in half along its longitudinal center to form an open U-shape. The folded packaging film F2 is then introduced into the turntable 20 from the tangential direction, as shown in Figure 1(B), and moves circumferentially (in the direction of rotation indicated by the arrow in Figure 1(B)) at a speed synchronized with the turntable 20.

[0025] As shown in Figure 1(B), numerous side sealing devices 7 (side sealers 1-12: 701-712) that form width seals are arranged on the turntable 20 in concentric circles around the rotation axis 20A (12 are shown here, but there may be 40 or more). The side sealers 1-12 (701-712), which rotate and move at a speed synchronized with the turntable 20, perform predetermined positioning (circumferential and height positioning) with respect to the packaging film F2 that is introduced onto the turntable 20 and rotated in the circumferential direction, and at the same time, they apply heat sealing in the width direction of the packaging film F2 to locally heat-press it.

[0026] Furthermore, the side sealer 1 (701) is configured as shown in Figure 2(A), and the portion of the packaging film sandwiched between the fixed sealer 1 (701A) and the movable sealer 1 (701B) of the side sealer 1 (701) is melted by the heat supplied from the heater (electric heating device) 701C provided in the side sealer 1 (701). At the same time, because the side sealer 1 (701) is sandwiching the packaging film F2, the melted portion of the folded packaging film F2 is pressurized. As a result, the heat-seal films of the folded packaging film F2 are pressed together, and a side seal S (see Figures 1(A) and 1(B)) is formed. The side sealers 2 to 12 (702 to 712) are configured as shown in Figure 2(B) and operate in the same manner as described above. In this way, multiple open-topped bag sections are formed in the folded packaging film F2, sandwiched between side sealing devices 7 (side sealers 1-12 (701-712)).

[0027] In parallel with the heat sealing operation by the side sealing device 7, a filling chute 8 is inserted between the folded packaging film F2, and the contents weighed by the weighing device 10 are fed through the filling chute 8. Multiple filling chutes 8 are arranged concentrically on the turntable 20 and are configured to rotate in the circumferential direction (the rotation direction of the arrows shown in Figure 1(B)) at a speed synchronized with the turntable 20 and, consequently, the packaging film F2.

[0028] After this, the packaging film F3 filled with contents is fed tangentially (left horizontal direction in Figure 1(B)) from the turntable 20, and the top sealing device (top sealing roll) 11 heat-seals the filling opening (upper opening) of the bag portion of the packaging film F3, heat-pressing it to form a top seal. As a result, the top-opening packaging film (continuous packaging bag) F3 filled with contents becomes a continuous packaging bag F4 with the contents sealed (see Figures 1(A) and (B)).

[0029] Subsequently, the cutter device 16 cuts the continuous packaging bag F4 (the continuous packaging bag F4 being held and transported by the clamp conveying device 14 is indicated by the symbol F5 in Figure 1(A)) into individual packaging bags P1, thereby producing packaging bags P1 (Figure 1(A)).

[0030] In this embodiment, temperature control is performed by adjusting the degree of heating of heaters 1 to 12 (701C to 712C) so that the sealing surface temperature (seal temperature) of the side sealing device 7 (side sealers 1 to 12 (701 to 712)) reaches a predetermined temperature.

[0031] Therefore, in this embodiment, as shown in Figure 1(A), the side sealer 1 (701) is equipped with a first temperature sensor 701D (such as a thermocouple). Note that, as shown in Figure 1(B), the side sealers 2 to 12 (702 to 712) differ from the side sealer 1 (701) in that they are not equipped with the first temperature sensor.

[0032] The control panel (control device) 17, which functions as a temperature controller, receives the temperature detection signal from the first temperature sensor 701D and is configured to detect the temperature of the side sealer 1 (701) based on this signal.

[0033] Furthermore, in this embodiment, as shown in Figure 1(B), a non-contact second temperature sensor 720 is provided. This second temperature sensor 720 is fixedly supported on the main body 2 and is configured to sequentially face the side sealers 1 to 12 (701 to 712) that rotate together with the turntable 20, and to sequentially detect their temperatures non-contact. For example, a metal-compatible radiation thermometer can be used as the second temperature sensor 720. In this embodiment, the temperature detection signal from the second temperature sensor 720 is input to the control panel (control device) 17, which is configured to sequentially detect the temperatures of the side sealers 1 to 12 (701 to 712).

[0034] Furthermore, the control device (operation panel) 17 according to this embodiment is equipped with a temperature controller function and controls the temperature of the side sealers 1 to 12 (701 to 712) and consequently the side seal by executing the flowchart shown in Figure 3.

[0035] As shown in the flowchart in Figure 3, In step 1 (labeled S in the diagram; the same applies below), the operator inputs the set temperature (S0) of the side seal via the input keys on the control panel 17. In Figure 4(A), 150 is entered as the set temperature.

[0036] In step 2, the control device 17 sets the set temperature (S0) to the target temperature (S1) (S1=S0=150°C).

[0037] In step 3, the first temperature sensor 701D (for example, a thermocouple built into the side sealer 1 (701)) detects the temperature (T1) inside the side sealer 1 (701), and controls the heaters 1 to 12 (701C to 712C) to heat up to the target temperature (S1) by controlling the control device 17 which has the function of a temperature controller. Each heater 1-12 (701C-712C) is controlled by a parallel-connected circuit, for example, to control its heating (power supply control). In other words, the heating control of the heaters maintains a simple configuration, similar to conventional designs, where the power supply wiring is a common, identical circuit for all heaters, and the temperature of all heaters 1-12 (701C-712C) is controlled simultaneously (commonly as part of the same circuit) by controlling the power supply to this circuit, without increasing the number of rotating contacts (such as slip rings).

[0038] In step 4, the second temperature sensor 720 (infrared thermometer) detects the sealing surface temperature (H1) of the side sealer 1 (701), and adjusts the emissivity of the second temperature sensor 720 so that H1 and S1 match. That is, the output of the second temperature sensor 720 is corrected so that the detected temperatures of the first temperature sensor 701D and the second temperature sensor 720 match. Note that the sealing surface temperature corresponds to the sealing temperature according to the present invention. Step 5 completes the initial setup (the device enters a standby state for operation).

[0039] In step 6, the control device 17 starts operating the horizontal rotary automatic filling and packaging machine 1 (production of packaging bags) at the operator's instruction.

[0040] In step 7, the first temperature sensor 701D detects the temperature (T1) inside the side sealer 1 (701), and the control device (temperature controller) 17 controls the power supply to each heater 1 to 12 (701C to 712C) so that the detected temperature T1 becomes the target temperature (S1). In addition, the second temperature sensor 720 sequentially detects the sealing surface temperatures (radiant temperatures) H1 to H12 of each side sealer 1 to 12 (701 to 712).

[0041] Step 8 determines whether the second temperature sensor 720 has completed the detection of all sealing surface temperatures (radiant temperatures) H1-H12 for each side sealer 1-12 (701-712). If YES, proceed to step 9; otherwise, return to step 7.

[0042] In step 9, the lowest seal surface temperature (HL) is obtained from among the most recent seal surface temperatures (H1 to H12) detected by the second temperature sensor 720 for each side sealer 1 to 12 (701 to 712). In Figure 4(B), "Minimum value = 147.8" is set to HL.

[0043] In step 9, calculate the temperature difference (D1) between the set temperature (S0) and the minimum sealing surface temperature (minimum value) (HL) (D1 = S0 - HL). In Figure 4(B), D1 = S0 - HL = 150 - 147.8 = 2.2, which means "corrected temperature = +2.2".

[0044] In step 10, a new target temperature (S1) is set by adding the temperature difference (D1) to the set temperature (S0) (S1 = S0 + D1). In Figure 4(B), S1 = S0 + D1 = 150 + 2.2 = 152.2, which means "the target temperature = 152.2". Then, return to step 7 and execute the above flow with a new target temperature (S1 = 152.2°C). Steps 7 to 10 described above represent the flow of temperature compensation control for side sealers 1 to 12 (701 to 712) and, consequently, the side seals during the operation (production) of the packaging machine 1.

[0045] Thus, in this embodiment, during the operation of the horizontal rotary automatic filling and packaging machine 1, the control device 17 automatically and appropriately controls the temperature of the side sealing device 7 of the horizontal rotary automatic filling and packaging machine 1 by detecting the temperature of the sealing surface (T1) using a first temperature sensor 701D that contacts a typical side sealer 1 and accurately detects its temperature, and then controls the temperature (power supply control) of the heaters 1 to 12 (701C to 712C) to reach the target temperature (S1) (starts the control device), A non-contact temperature sensor (second temperature sensor 720) sequentially detects the temperature of the sealing surface of all side sealers 1 to 12 (701 to 712). The difference between the lowest sealing surface temperature (minimum sealing surface temperature (HL)) and the set temperature (S0) is set as the new target temperature (S1). The power supply to heaters 1 to 12 (701C to 712C) is uniformly controlled to reach this new target temperature (S1), thereby controlling the temperature of side sealers 1 to 12 (701 to 712).

[0046] In this embodiment of side sealer temperature control, the actual temperature (T1) of the side sealer 1 (701) during operation is detected by a first temperature sensor 701D that contacts the sealing surface of a typical side sealer 1 (701) to detect the precise temperature. The heaters 1 to 12 (701C to 712C) are controlled so that this temperature (T1) becomes the target temperature (S1). At the same time, a non-contact second temperature sensor 720 is used to sequentially detect the temperatures (H1 to H12) of the side sealers 1 to 12 (701 to 712) that are rotated by the turntable 20. Based on the temperature variation (H1 to H12), the target temperature (S1) is corrected. As a result, the target temperature of the entire side sealer is gradually corrected to an appropriate value automatically, the sealing surface temperature of the lowest side sealer becomes approximately the same as the initial set temperature, and it is possible to suppress the occurrence of defective products due to sealing failures with minimal temperature rise.

[0047] In other words, in this embodiment, while the temperature detection accuracy of the sealing surface of the side sealer is high, the first temperature sensor (a contact-type temperature sensor such as a thermocouple) is difficult to install on a large number of side sealers because it requires a rotating contact, etc., which leads to increased complexity of the structure, increased costs, and decreased reliability. Therefore, the first temperature sensor is provided on one side sealer (or a smaller number of side sealers than the total number), In addition to this first temperature sensor, a second temperature sensor (for example, a non-contact temperature sensor such as a radiation type) is provided, which can detect the temperature of numerous side sealers arranged concentrically and circumferentially on the turntable in a non-contact manner with a relatively simple configuration, without the need for rotating contacts or other components that would complicate the structure, increase costs, or reduce reliability. The first temperature sensor detects the precise temperature of the side sealer, sets a target temperature based on this, and controls the temperature (power supply, heating) of the heaters of multiple side sealers to reach that target temperature. The second temperature sensor acquires the temperature (H1~H12) (temperature variation) of each sealing surface of numerous side sealers, and the target temperature is corrected based on the results. Without complicating the configuration, increasing costs, or reducing reliability, the target temperature of the entire side sealer can be gradually and automatically corrected to the appropriate value. This allows the lowest (or highest) side sealer's sealing surface temperature to be controlled to approximately the same value as the initial set temperature, thereby suppressing the occurrence of defective products due to sealing failures caused by temperature increases or decreases.

[0048] Therefore, according to this embodiment, it is possible to provide a horizontal rotary type automatic filling and packaging machine that is simple, low-cost, and reliable in its configuration, while enabling more precise temperature control of the side sealer, thereby reducing the occurrence of defective packaging bags.

[0049] In this embodiment, the temperature correction control of the side sealer (heater) is performed by correcting the target temperature based on the temperature variation (relatively small variation) acquired by the second temperature sensor 720 at relatively short time intervals. Compared to the conventional method of performing temperature correction control of the side sealer (heater) in one phase with a relatively large correction value to reduce the change when the temperature detected by the first temperature sensor changes above a predetermined level, this embodiment contributes to realizing finer temperature correction control of the side sealer (heater) that is less prone to overshoot and control hunting.

[0050] In this embodiment, the example described was one in which 12 side sealers are concentrically arranged on the turntable 20. Therefore, the case where the sealing surface temperatures (radiant temperatures) H1 to H12 of each side sealer 1 to 12 (701 to 712) are detected sequentially was described as a representative example. However, the present invention is not limited to this, and the temperatures can be from H1 to HN (N = number of set samples per cycle). In this case, the minimum value of H1 to HN for each predetermined cycle is set to HL, and from the start of operation until the completion of one cycle, S0 is set as the target temperature, and the heaters of all the side sealers are controlled in common as the same system so that T1 becomes S0. From the next cycle onward, a corrected target temperature S1 is calculated by adding a correction value D1, which is obtained by subtracting HL from S0, to S0 for each cycle, and the heaters of all the side sealers are controlled in common as the same system so that T1 becomes S1. Note that "N = number of samples per cycle" can be assumed to be the number of side sealers on the turntable or a multiple thereof.

[0051] Furthermore, as a correction of the target temperature (S1) based on the temperature (H1~H12) variation of side sealers 1~12 (701~712), the example given here is the case where the target temperature is corrected so that the minimum temperature (HL) approaches the set temperature (S0) (S1=S0+HL). However, it is not limited to this, and for example, the target temperature can also be corrected so that the maximum temperature (HH) approaches the set temperature (S0) (S1=S0-HH), or so that the deviation δ (=|S0-HA|) between the average temperature (HA) of H1~H12 and the set temperature (S0) becomes 0 (S1=S0±δ).

[0052] Furthermore, the system can be configured to compare the temperatures (H1 to H12) of the sealing surfaces of numerous side sealers obtained by the second temperature sensor with the upper and lower temperature thresholds. If any side sealer sealing surface temperatures exceed the upper temperature threshold or fall below the lower temperature threshold, the system may issue an alarm or stop operation (a fault diagnosis configuration).

[0053] Furthermore, various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0054] 1: Horizontal rotary automatic filling and packaging machine 2: Main unit 3: Support shaft for packaging film roll (in use) 4: Support shaft for packaging film roll (on standby) 5: Packaging material feeding device 6: Bag Making Guide 7: Side sealing device 8: Filling Chute 9: Hopper 10:Measuring device 11: Preheating device 12: Top sealing device 13: Notch device 14: Clamp conveying device 15: Cutter device 16: Loading slide (loading chute) 17: Control panel (control device) F1: Roll-type packaging film (in use) F1': Roll-type packaging film (on standby) F2: Strip-shaped packaging film F3: Continuous packaging bag with top opening F4: Continuous packaging bag F5: Continuous packaging bags being held and transported by a clamp. F6: Cut continuous packaging bags P1: Packaging bag for good quality products P2: Packaging bag for defective products 701: Side Sealer 1 701A: Fixing sealer 1 701B: Movable sealer 1 701C: Heater 1 701D: First temperature sensor 702~712: Side Sealer 2~Side Sealer 12 702A: Fixing sealer 2 702B: Movable sealer 2 702C: Heater 2 720: Second temperature sensor

Claims

1. A side sealing device that heat-seals a packaging film, which has its central portion folded while being transported horizontally, in the width direction, A filling chute for loading contents into the packaging film bag section separated by the side sealing device, A turntable configured to rotate relative to the packaging machine body within a horizontal plane, which rotates the side sealing device and the filling chute, A top sealing device that heat-seals the upper edge of the packaging film bag portion filled with contents, The system includes an operating panel that allows setting the seal temperature of the side seal device, and a temperature controller that controls the seal temperature of the side seal device, A horizontal rotary type automatic filling and packaging machine equipped with, The side seal device is, Multiple side sealers are arranged in a ring and perform a sealing action on the packaging film, Each of the aforementioned multiple side sealers is equipped with a heater, A first temperature sensor is provided in at least one of the plurality of side sealers, and contacts the sealing surface of the side sealer to detect the sealing surface temperature, A second temperature sensor is positioned on the packaging machine body side of the outer circumference of the turntable and non-contactively detects the sealing surface temperature of the plurality of side sealers at predetermined timings. It is equipped with, The aforementioned temperature controller The set temperature input from the aforementioned control panel is S0, The temperature detected by the first temperature sensor on the sealing surface of at least one side sealer is T1, The temperature detected by the second temperature sensor on the sealing surface of each of the multiple side sealers is ranged from H1 to HN (N = set number of samples per cycle), The minimum value of H1 to HN for each predetermined cycle is HL. In that case, From the start of operation until one cycle is completed, the heaters of all the side sealers are controlled in common as a single system so that the target temperature is S0 and T1 becomes S0. For subsequent cycles, a corrected target temperature S1 is calculated by adding a correction value D1 (obtained by subtracting HL from S0) to S0 for each cycle, and the heaters of all the side sealers are controlled in common as a single system so that T1 becomes S1. A horizontal rotary type automatic filling and packaging machine characterized by the following features.

2. The horizontal rotary type automatic filling and packaging machine according to claim 1, characterized in that the second temperature sensor is a radiation thermometer.

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