JP6803603B2 - Bag making filling and packaging machine - Google Patents

Description

The present invention relates to a bag-making filling and packaging machine in which a strip-shaped packaging material is bent into a substantially tubular packaging material, and both side edges of the substantially tubular packaging material are vertically sealed to form a tubular packaging material. The present invention relates to a vertical bag-making and packaging machine in which the sealing device is an ultrasonic seal.

Conventionally, as a bag-making filling / packaging machine, the applicant has proposed a vertical bag-making filling / packaging machine as shown in FIG. 7 (see Patent Document 1). In the bag-making filling and packaging machine 100 shown in FIG. 7 (a diagram based on FIG. 2 of Patent Document 1; reference numerals are in the 100s), the web-like packaging material Fw unwound from the take-up roll has an appropriate tension. Is given, and then supplied to the former 130. The web-shaped packaging material Fw is bent by the former 130 into a substantially tubular shape in which both side edge portions Fe and Fe are close to each other. A filling cylinder 150 having a hopper 151 at the top is fitted in the former 130, and the curved packaging material passes through a gap having an annular cross section formed between the former 130 and the filling cylinder 150. ..

In the packaging material that is bent into a substantially tubular shape and sent so as to surround the outer circumference of the filling cylinder 150, both side edge portions Fe and Fe are sealed by the vertical sealing device 160 to form the tubular packaging material Ft. The vertical sealing device 160 is configured as an ultrasonic sealer, and includes an ultrasonic oscillator 162 having a horn 161 at the tip and a disk-shaped anvil 164 arranged to face the horn 161. The ultrasonic oscillator 162 is pressed against the anvil 164 by the actuator 163. The anvil 164 is rotationally driven by the motor 165 at the same speed as the film or slightly faster, and the portion facing the horn 161 is sequentially changed. Both side edge portions Fe and Fe of the packaging material sandwiched between the horn 161 and the anvil 164 are welded by ultrasonic vibration.

A belt-type packaging material feeding device 170 as a paper feeding means is arranged on the side of the filling cylinder 150 with the tubular packaging material Ft sandwiched between the outer peripheral surface of the filling cylinder 150 and the belts 171 and 171. By sandwiching the tubular packaging material Ft between them, the tubular packaging material Ft is fed downward by the traveling of the belts 171 and 171. Through the filling cylinder 150, a package such as food such as confectionery is dropped and filled into a bag formed of the tubular packaging material Ft, and two lateral heat seal bars 141 and two arranged so as to constitute the horizontal seal device 140. The 141 sandwiches the tubular packaging material Ft to seal in the transverse direction, seals the upper opening of the bag P formed in advance, and forms the bottom of the subsequent bag P. In this way, by repeating the operations of dropping, filling, and sealing the food into the bag through the filling cylinder 150 at the same timing as the formation of the bag, the bag package containing the package in the bag P is continuously formed. Can be manufactured. A cutter mechanism is incorporated in the horizontal sealing means 140, and when the tubular packaging material Ft is laterally sealed, the bag packaging body manufactured in advance of the tubular packaging material Ft and the subsequent bag P are used. Can be cut and separated between.

According to this vertical bag-making filling and packaging machine 100, the web-shaped packaging material Fw is guided to the former 130 and wound around the filling cylinder 150 to form a substantially tubular curved packaging material, which is provided on the side of the cylinder. The packaging material is drawn by the packaging material feeding device 170, and the packaging material is vertically sealed by the vertical sealing device 160 including the ultrasonic oscillator 162 provided on the one side of the cylinder with respect to the side edge portions Fe and Fe that are joined on one side of the cylinder. To form a tubular packaging material Ft, the top and bottom of the package to be dropped and filled into the filling cylinder 150 are horizontally sealed (further cut by a cutting means) by the openable and closable horizontal sealing device 140 provided below the cylinder. .. By installing the horizontal seal device 140 on an elevating table that can move up and down as shown in the figure, the distance from the cylinder to the horizontal seal position can be adjusted to the size of the cylinder diameter to the extent that wrinkles do not occur in the tubular packaging material Ft. By changing this, the falling distance of the package can be shortened as much as possible. By forming the packaging material feeding device 170 into a belt-type structure having a vacuum function provided in pairs on the left and right sides of the cylinder, the actuator keeps the belt close to the cylinder and vacuums the tubular packaging material Ft while drawing paper. You can also do it. Since the vertical sealing device 160 is not a long sealing means such as a bar heater but a means for spot-sealing, the packaging material to be fed paper moves relative to the vertical sealing device 160 to form both side edge portions. Fe and Fe are continuously sealed.

Conventionally, in the ultrasonic sealer, in order to prevent so-called "blank hitting" ("empty seal") in which ultrasonic waves are oscillated without sandwiching the packaging material between the horn and the anvil, a packaging material detection sensor or a horn is used. I was trying to determine the presence or absence of packaging material between the horn and the anvil with a distance sensor that detects the distance to the anvil. However, when the packaging material detection sensor is used, the position where the packaging material detection sensor is arranged and the position where ultrasonic sealing is performed are separated, so that even if the packaging material detection sensor detects the packaging material, It is possible that the packaging material is not in place at the position where the ultrasonic seal is performed. Further, when a distance sensor for detecting the distance between the horn and the anvil is used, erroneous detection may occur when the arrangement position of the distance sensor is displaced. In this way, regarding the installation position of the sensor that detects the presence or absence of packaging material, it is necessary to pay close attention not only in the case of new installation but also in the case of maintenance, and it takes labor and time for work. It has become.

By the way, although it is not a bag-making filling and packaging machine, the opening of the bag opening and the object to be packaged are transferred intermittently or continuously along a predetermined track while holding both side edges of the bag with a pair of left and right grippers. In a bagging and packaging machine that sequentially performs predetermined packaging processing such as filling of bags and sealing of bag openings, a device using an ultrasonic sealing device that seals the bag openings using ultrasonic waves has been proposed (Patented). Reference 2). The ultrasonic sealing device includes a horn and an anvil configured so as to be detachable from each other, and the ultrasonic sealing device is further provided with ultrasonic waves arranged at a predetermined sealing process position of the bagging and packaging machine. A sensor that detects whether or not the sealing device main body and the bag mouth of the bag arranged at the sealing process position and transferred to the sealing process are in a predetermined sealing permission state between the horn and the anvil. It is provided with an electric circuit including the above and a control device for controlling the ultrasonic seal device main body based on a signal from the sensor. The control device detects whether the bag is in the sealing permitted state before sealing with a sensor placed in the sealing process, and controls the ultrasonic sealing device based on the signal to reliably prevent empty sealing. However, it prevents damage to the ultrasonic sealing device.

The detection sensor and electric circuit used in the above ultrasonic sealing device are of the type that detect the electrical conduction between the horn and the anvil or the change in the electrical resistance that occurs between the horn and the anvil. .. As shown in FIG. 8 (figure based on FIG. 8 of Patent Document 2; reference numerals are in the 200 series), the anvil 276 is an insulator 279 on an anvil support member 278 that moves forward and backward relative to the horn 239. It is attached via. An electric resistor 280 is attached in the middle of the wiring L3 connecting the horn 239 and the anvil 276, and a variable resistor is installed in the middle of the wiring L5 connecting the detection sensor 281 provided in the control device 220 and the anvil 276. 282 is attached. By electrically connecting the detection sensor 281 to the horn 239 and the anvil 276 by individual wirings L3 and L5, the detection sensor 281 can be used as a horn when the horn 239 and the anvil 276 move to the closest position. It detects the electrical conduction between the 239 and the anvil 276 or the change in electrical resistance that occurs between the horn 239 and the anvil 276.

When the horn 239 and the anvil 276 are close to each other, the total resistance value changes when the pressing surfaces 240 and 277 are in direct contact with each other. When the detection sensor 281 detects electrical conduction or a change in the electrical resistance value, the control device 220 determines that there is no bag mouth between the horn 239 and the anvil 276 and the seal is not in the permitted state. On the other hand, when the detection sensor 281 does not detect the electrical continuity or the change in the electric resistance value, the control device 220 determines that there is a bag opening that does not bring the pressing surfaces 240 and 277 into contact with each other. Judges that the seal is permitted. An example in which the wiring L3 and the electric resistor 280 are not provided as an electric circuit is also described. In this case, the horn 239 and the anvil 276 are changed from a state in which they are not directly conductive to a state in which they are directly conducted. Whether or not it is detected. If it remains non-conducting, it can be detected that there is a bag mouth.

Since the ultrasonic sealing device described in Patent Document 2 is not configured to detect the mechanical gap when the horn 239 and the anvil 276 are closest to each other, it is not affected by mechanical rattling or the like. The wiring L2 is a line connecting the ultrasonic oscillator in the control device 220 to the oscillator, and the wiring L3 is a line connecting the horn 239 and the anvil 276. A closed circuit composed of a horn 39, a wiring L3, an anvil 76, a wiring L5, a detection sensor 81, and a wiring L4 is formed, and the electric resistance contained therein is an electric resistor 80 and a variable resistor 82 connected in series. .. The electric resistor 80 also makes it possible to detect the disconnection of the wiring L3 connecting the horn 239 and the anvil 276 and the wirings L4 and L5 connecting the horn 239 and the anvil 276 to the detection sensor 281, respectively. When this is detected, the control device 220 determines that the bag mouth of the bag is not in the seal permitted state, does not apply ultrasonic vibration to the horn 239, and prevents the ultrasonic seal device from being damaged by the empty seal. doing.

In the ultrasonic sealing device that detects the presence or absence of the bag mouth by the electric circuit including this detection sensor, the resistance value changes (when the wiring L3 and the electric resistor 280 are provided), or the state becomes conductive. If it changes (when the wiring L3 and the electric resistor 280 are not provided), it is judged that the seal is not in the permitted state, so control is performed so that the horn 239 is not subjected to ultrasonic vibration, and the horn 239 and the anvil 276 are used. It is possible to prevent oscillation of ultrasonic waves (referred to as "blank shot" or "blank seal") without sandwiching the packaging material (wrapping film) between the two, but the resistance value does not change when the wiring L3 is provided. Or, if the wiring L3 is not provided, the non-conduction remains, and the presence of the bag mouth is detected on the condition that there is no change in the situation. Therefore, there is no change in the situation as another cause. It cannot be excluded that the cause is due to the above, and the circuit failure of the ultrasonic sealing device and the malfunction of the control device cannot be completely eliminated. Therefore, in such a case, ultrasonic vibration should be applied even though the bag mouth is originally present and the seal is not permitted, or the seal is not permitted. There is a possibility of controlling it. Further, as the electric circuit includes an electric resistor 280, a variable resistor 282, and a detection sensor 281, the number of circuit elements is large and the manufacturing cost is high.

Japanese Unexamined Patent Publication No. 01-124508 JP 2015-006915

Therefore, in a bag-making filling and packaging machine that forms a tubular packaging material by vertically sealing a packaging material that is curved into a substantially cylindrical shape with an ultrasonic seal, between the horn and the anvil provided in the ultrasonic sealing device. When detecting whether or not there is a packaging material to be ultrasonically sealed in an electric circuit provided with a detection sensor in the wiring connecting the horn and the anvil, the detection sensor is composed of an ammeter type. It has been found that the circuit configuration becomes complicated because the resistors and the like cannot be omitted. Therefore, in the above-mentioned bag-making filling and packaging machine, there is a problem to be solved in that the circuit configuration is further simplified when the electric circuit detects whether or not the packaging material is present in the ultrasonic sealing device. is there.

An object of the present invention is to solve the above-mentioned problems, and to provide a horn provided in an ultrasonic sealing device in a bag-making filling and packaging machine for vertically sealing a packaging material bent into a substantially cylindrical shape with an ultrasonic seal. When detecting whether or not there is a packaging material to be ultrasonically sealed between the anvil and the horn by an electric circuit having a wiring between the horn and the anvil, the elements constituting the electric circuit are inexpensive. It is to provide a bag-making filling and packaging machine capable of reducing the manufacturing cost by being composed of various materials.

In order to solve the above problems, the bag-making filling and packaging machine according to the present invention includes an ultrasonic horn and an anvil capable of sandwiching both side edges of a substantially tubular packaging material curved from a strip-shaped packaging material. And a control that controls the ultrasonic vibration of the ultrasonic sealing device and the ultrasonic sealing device that performs vertical sealing by welding the both side edge portions by ultrasonic vibration to form a tubular packaging material. A bag-making filling and packaging machine including the device, wherein one of the ultrasonic horn and the anvil is attached to a packaging machine frame supporting the ultrasonic sealing device via an insulating material, and the ultrasonic horn and the anvil are attached to the packaging machine frame. The other of the ultrasonic horn and the anvil is grounded via the packaging machine frame, and the ultrasonic horn attached to the packaging machine frame or the input wiring connected to the anvil via the insulating material. and parts, sensing circuit and a output circuit section you output the conduction and non-conduction state between said anvil and the ultrasonic horn to the controller in response to an input from the input wiring portion is formed The control device is in a closed state due to the ultrasonic horn and the anvil being operated close to each other , and the output of the output circuit unit of the detection circuit is in the non-conducting state. It is characterized in that it controls to oscillate the ultrasonic vibration in response to simultaneously receiving the above as an input.

According to this bag-making filling and packaging machine, when the ultrasonic horn and the anvil are in a closed state due to close operation with each other, the packaging is bent into a substantially tubular shape between the ultrasonic horn and the anvil. Since the ultrasonic horn and the anvil are in direct contact with each other when both side edges of the material are not sandwiched, in the detection circuit, the input wiring part, the anvil, and the ultrasonic horn are passed through the grounded packaging machine frame. A closed circuit is formed in series, and the output circuit unit outputs that the ultrasonic horn and the anvil are in a conductive state. Therefore, the control device receives that the output of the output circuit portion of the detection circuit is in a conductive state even when the ultrasonic horn and the anvil are closed, so that both side edge portions of the packaging material are sandwiched. It is judged that there is no ultrasonic vibration. When both side edges of the packaging material curved in a substantially tubular shape are sandwiched between the ultrasonic horn and the anvil, the ultrasonic horn and the anvil do not come into contact with each other, and in the detection circuit, the closed circuit Is not formed, and the output circuit unit outputs that there is no conduction between the ultrasonic horn and the anvil. Therefore, the control device receives that the output of the output circuit portion of the detection circuit is in a non-conducting state when the ultrasonic horn and the anvil are in a closed state due to close operation with each other. It is determined that both side edges of the material are sandwiched, ultrasonic vibration is oscillated, and ultrasonic seals are applied to both side edges of the packaging material.

In this bag-making filling and packaging machine, the input wiring unit is only wiring that connects the ultrasonic horn or the anvil and the output circuit unit attached to the packaging machine frame via the insulating material, and the wiring is described. The output circuit unit is characterized by including a photocoupler as a switching element that outputs to the control device in response to an input from the input wiring unit. Since the input wiring portion is only wiring and does not intervene circuit elements such as resistors, the detection circuit can be configured extremely simply. Further, a photocoupler can be used as the switching element of the output circuit unit.

In this bag-making filling and packaging machine, the input wiring portion is arranged in the ultrasonic horn or the wiring connecting the anvil and the output circuit portion attached to the packaging machine frame via the insulating material. The output circuit unit includes a relay coil, and the output circuit unit includes a relay that outputs a relay to the control device in response to an input from the relay coil. The relay coil and the relay are very inexpensive as circuit elements, and the circuit can be simply configured.

According to the bag-making filling and packaging machine of the present invention, one of the inputs to the control device is a closed state due to the state between the ultrasonic horn and the anvil being moved close to each other, and to the control device. The ultrasonic oscillation of the ultrasonic seal is performed under the AND condition that the circuit wiring passing between the ultrasonic horn and the anvil is in a non-conducting state at the other end of the input. Since it is possible to directly determine whether or not there is a packaging material to be sandwiched between the ultrasonic horn and the anvil, it is possible to prevent the ultrasonic waves from being blown more reliably than by the packaging material detection sensor or the distance sensor. ..
That is, when the circuit wiring is energized, the control device determines that the packaging material is not interposed between the ultrasonic horn and the anvil, and the ultrasonic sealing device does not output ultrasonic vibration. It shifts to the next cycle without ultrasonic sealing operation (the package manufactured by the packaging machine is defective and is excluded from the line). When the circuit wiring is not energized, the control device determines that a packaging material is interposed between the ultrasonic horn and the anvil, and causes the ultrasonic sealing device to oscillate ultrasonic vibration to seal the circuit. Move to operation.
Further, it is not necessary to provide an ammeter type element as a circuit element of the detection circuit connected to the ultrasonic horn and the anvil to detect the presence or absence of the packaging material, and the detection circuit can be configured easily and inexpensively. ..

FIG. 1 is a perspective view showing an embodiment of a bag-making filling / packaging machine according to the invention. It is a front view which shows the combined state of the former, the filling cylinder, and the vertical sealing device used in the bag making filling packaging machine shown in FIG. It is explanatory drawing which shows the opening and closing of the vertical sealing means used in the bag making filling packaging machine shown in FIG. It is a cross-sectional view of the vertical sealing means used in the bag making filling and packaging machine shown in FIG. It is a figure explaining an example of the detection circuit of the bag making filling packaging machine by this invention. It is a figure explaining another example of the detection circuit of the bag making filling packaging machine by this invention. It is a perspective view which shows an example of the conventional vertical bag making packaging machine which performs vertical sealing by ultrasonic sealing. It is a figure which shows an example of the ultrasonic sealing apparatus which seals a bag mouth with an ultrasonic seal, and detects the presence or absence of a bag mouth with an electric circuit.

Hereinafter, examples of the bag-making filling and packaging machine according to the present invention will be described with reference to the attached drawings. FIG. 1 is a perspective view showing an embodiment of a bag-making filling / packaging machine according to the present invention, and FIG. 2 shows a combined state of a former, a filling cylinder, and a vertical sealing device used in the bag-making filling / packaging machine shown in FIG. It is a front view which shows. Further, regarding the vertical sealing device used in the bag-making filling and packaging machine shown in FIG. 1, an explanatory view showing the opening and closing of the vertical sealing device is shown in FIG. 3, and a cross-sectional view of the vertical sealing device is shown in FIG. Has been done. The basic structure of the bag-making filling and packaging machine shown in FIG. 1 is the same as that of the conventional bag-making filling and packaging machine described with reference to FIG. 7. In this embodiment, the bag-making filling and packaging machine manufactures a bag packaging body by putting the product to be packaged into a vertically placed filling cylinder and filling the bag with the product while producing a bag from the packaging material. It is embodied as a vertical bag-making filling and packaging machine.

In the bag-making filling and packaging machine 1 shown in FIGS. 1 to 4, the strip-shaped packaging material Fw is wound into a roll and the strip-shaped packaging material Fw is unwound from the winding roll Fr to store a part of the strip-shaped packaging material Fw. A feeding mechanism 10 that applies an appropriate tension at the same time, an accessory device 20 such as a printing device that prints on the strip-shaped packaging material Fw, and a former that bends the continuously fed strip-shaped packaging material Fw into a substantially tubular packaging material. 30 and a horizontal sealing device 40 for sealing a tubular packaging material formed by applying a vertical seal in the transverse direction.

As shown in FIG. 1, the packaging material feeding device 70 is a suction paper feeding device that feeds paper while sucking the tubular packaging material Ft from the outside. Specifically, the packaging material feeding device 70 includes paper feeding belts 71 and 71 arranged to face each other on both sides of the tubular packaging material Ft in the radial direction. Each paper feed belt 71 is formed with a plurality of suction holes 72 arranged in a row in the longitudinal direction at a position at the center in the width direction. Each paper feed belt 71 is wound around a motor-driven drive pulley 73, a driven pulley 74, and a guide pulley 75. A suction means (not shown) sucks air through the suction hole 72. By the driving force from the drive pulley 73, the tubular packaging material Ft in contact with the paper feed belt 71 is sucked from the outside and the paper is fed downward. As the paper-fed tubular packaging material Ft moves relative to the vertical sealing device 60, both side edge portions Fe and Fe are continuously sealed as vertical sealing.

As shown in FIG. 2, the former 30 includes a sailor portion 31 that bends the strip-shaped packaging material Fw into a substantially cylindrical shape, and a packaging material that is connected to the sailor portion 31 and is bent into a substantially cylindrical shape. Hereinafter, it is provided with a tubular portion 32 through which a “substantially cylindrical curved packaging material”) is passed. The sailor portion 31 is formed on a curved sailor body 33 that acts on the strip-shaped packaging material Fw to form a substantially cylindrical shape, and tip edge portions 34a, 34a of the sailor body 33 that face each other, and the strip-shaped packaging material Fw. It has an overlapping portion 34 that allows both side edge portions Fe and Fe of the above to be overlapped and the overlapped both side edge portions Fe and Fe to pass through. The sailor body 33 wraps around the tubular portion 32 in a smooth curved surface from the back side to the front side, and the overlapping portion 34 is formed at the lower end of the front surface of the sailor body 33.

The tubular portion 32 is composed of a tubular main body 35 that extends downward from the overlapping portion 34 of the sailor portion 31 in a tubular manner and is terminated at the lower end 36. The tubular main body 35 is formed with a slit 37 that is connected to the superposed portion 34 and extends so as to extend vertically, and the superposed side edge portions Fe and Fe can pass through in a state of protruding to the front side. There is.

The filling cylinder 50 fitted in the former 30 is a metal (stainless steel) cylindrical body, and is fitted with an annular gap 51 inside the tubular portion 32 of the former 30, and is substantially cylindrical. The curved packaging material can pass through the gap 51 between the inner peripheral surface of the tubular portion 32 and the outer peripheral surface of the filling cylinder 50. In the example shown in FIG. 2, the filling cylinder 50 has a form extending further downward from the lower end 36 of the tubular portion 32 of the former 30. The filling cylinder 50 also has a function of feeding the tubular packaging material Ft in cooperation with the paper feeding means 70 on the outer peripheral surface thereof.

The vertical sealing device 60 is below the overlapping portion 34 of the former 30 , specifically below the lower end 36 of the tubular portion 32 as shown in FIG. 2, and corresponds to the slit 37 formed in the tubular main body 35. the are disposed at positions, an ultrasonic longitudinal sealing apparatus provided with ultrasonic horn 61 ultrasonic generator 62, and the anvil 64. The ultrasonic horn 61, the ultrasonic generator 62, and the anvil 64 are unitized as an ultrasonic seal unit. The vertical sealing device 60 applies vertical sealing by pressurizing and vibrating both side edge portions Fe and Fe of the packaging material that is moving while maintaining a state of protruding to the front side through the slit 37, and melt-welding. The vertical sealing device 60 is a sealing device that seals both side edge portions Fe and Fe in a spot manner, and the substantially cylindrical curved packaging material moves relative to the vertical sealing device 60 in the vertical direction by the packaging material feeding device 70. As a result, continuous vertical ultrasonic seals are applied to the side edge portions Fe and Fe protruding from the slit 37 to the front side, and the substantially cylindrical curved packaging material is formed into the tubular packaging material Ft. The height dimension (vertical dimension) of the vertical sealing device 60 has a length sufficiently shorter than the vertical length of the slit 37, and is higher than the case of the bar-shaped vertical heat sealing device. Since the dimensions are suppressed, it contributes to shortening the height of the packaging machine.

The ultrasonic horn 61 is a substantially rod-shaped body made of metal, and projects from the ultrasonic wave generating portion 62 on the proximal end side toward the anvil 64 side. The anvil 64 is a metal cylinder whose peripheral surface faces the tip of the ultrasonic horn 61. In the ultrasonic generation unit 62, high-frequency electric energy is converted into mechanical vibration energy by a converter composed of a piezoelectric element, the mechanical vibration energy is amplified by a booster, and ultrasonic waves are directed toward anvil 64 through a resonator called a horn 61. Vibration is transmitted. Both side edge portions Fe and Fe sandwiched between the ultrasonic horn 61 and the anvil 64 in a pressurized state are generated due to rubbing against their interface by the vibration energy transmitted to the ultrasonic horn 61. It is melted and welded by the frictional heat.

As shown in FIG. 1, the horizontal seal device 40 includes two horizontal heat seal bars 41 and 41 arranged to face each other, and pressurizes the tubular packaging material Ft between the two horizontal heat seal bars 41 and 41. By heating, a seal in the transverse direction (horizontal seal Se) is made to seal the upper opening of the bag P1 formed in advance and to form the bottom of the bag P2 following. The horizontal sealing device 40 incorporates a cutter mechanism 45 as in the conventional packaging machine. As the cutter mechanism 45, a cutter blade 46 is incorporated in one lateral heat seal bar 41 so as to be able to advance and retreat, and in the other lateral heat seal bar 41, in order to cut the sandwiched tubular packaging material Ft, A groove 47 is formed in which the advanced cutter blade 46 enters.

The details of the vertical sealing device 60 will be described later with reference to FIGS. 3 and 4. The vertical sealing device 60 is provided in a state of being housed inside the rotating arm 65, and the rotating arm 65 is rotated with respect to the mounting arm 67 attached to the device frame (not shown) by the hinge 66. It is provided so that it can be moved. By placing the rotating arm 65 at the loading position (a) in FIG. 3, the vertical sealing device 60 can be operated. By rotating from the loading position (a) and placing it in the evacuation position (b), the bag-making filling and packaging machine 1 can be set and maintained.

As shown in FIG. 4, the mounting arm 67 includes a screw mechanism 68 so that the rotating arm 65 and the hinge 66 can be moved back and forth with respect to the tubular portion 32. The screw mechanism 68 includes a motor 68a, a gear mechanism 68b that transmits the rotation output thereof, and a screw shaft 68c that is given rotation by the gear mechanism 68b. By the rotation of the screw shaft 68c, the hinge 66 and the rotating arm 65 move back and forth with respect to the tubular portion 32 of the former 30 together with the support 66a screwed to the screw shaft 68c. By the adjustment operation by the rotation of the screw shaft 68c, the position of the vertical sealing device 60 with respect to the side edge portions Fe and Fe of the packaging material can be adjusted according to the size of the former 30 corresponding to the design of the bag and the like.

In FIG. 5, in the vertical sealing device 60, whether the side edge portions Fe and Fe, which are the portions to be sealed of the substantially tubular curved packaging material, are present between the ultrasonic horn 61 and the anvil 64. An example of an electrical detection circuit that detects whether or not it is shown is shown. FIG. 5A is a diagram showing an example of an input circuit unit including the ultrasonic horn 61 and the anvil 64 of the detection circuit, and FIG. 5B is an example of an output circuit unit that outputs the detection result of the detection circuit. It is a figure which shows. Further, FIG. 5C shows a state in which the ultrasonic horn 61 and the anvil 64 are not electrically connected to each other due to the presence of a packaging material between them when the ultrasonic horn 61 and the anvil 64 are closed. d) shows a state in which the ultrasonic horn 61 and the anvil 64 are electrically connected to each other because there is no packaging material between them when the ultrasonic horn 61 and the anvil 64 are closed. In the following description based on FIGS. 5 and 6, the ultrasonic horn 61 and the anvil 64 are in the closed state because the ultrasonic horn 61 and the anvil 64 are moved close to each other by the driving means. The driving means may be an appropriate means such as an electric or fluid actuator, but it means that the ultrasonic horn 61 and the anvil 64 are brought into a closed state by actually mechanically shifting their positions and approaching each other. ..

In the input circuit section 81 of the detection circuit 80 shown in FIG. 5A, the ultrasonic horn 61 of the vertical sealing device 60 has an ultrasonic wave generating section 62 located on the proximal end side, referring to the structure shown in FIG. It is electrically connected to the frame Mf of the vertical bag making and packaging machine 1 via a rotating arm 65 and the like. The frame Mf of the packaging machine is electrically grounded. Further, as shown in FIG. 4, the anvil 64 is attached in a state of being electrically insulated from the rotating arm 65 by interposing an insulating material 83. The anvil 64 is connected to the input terminal 85 of the output circuit unit 82 of the detection circuit 80 via the wiring 84. The input circuit unit 81 is substantially composed of only the wiring 84, and is extremely simple. Further, the ultrasonic horn 61 and the anvil 64 are in an open state.

The output circuit unit 82 of the detection circuit 80 shown in FIG. 5B is only an example, but is used as a general input circuit to a control circuit such as a PLC (programmable controller) or a microcomputer. It is a photocoupler 86. The photocoupler 86 is composed of a photodiode 87 and a phototransistor 88, and the input terminal 85 of the input circuit unit 81 is connected to the photocoupler 86. The photodiode 87 and the phototransistor 88 are each connected to an internal DC power supply via a resistor. When the potential of the input terminal 85 of the photocoupler 86 becomes 0 V, the internal photodiode 87 emits light, and the phototransistor 88 receives the light and its operation changes from OFF to ON. As a result, the phototransistor 88 functions as a switch function. When the ultrasonic horn 61 is not closed toward the anvil 64 and is in an open state, the input state of the input terminal 85 is OFF due to the insulating action of the insulating material 83. Further, as shown in FIG. 5C, even when the ultrasonic horn 61 is closed with respect to the anvil 64, both side edge portions Fe of the packaging material between the ultrasonic horn 61 and the anvil 64 , Fe is sandwiched, the input state of the input terminal 85 is OFF due to the insulating action of the side edge portions Fe and Fe. If the photodiode 87 side is not grounded, the potential of the input terminal is not 0V, and the photodiode 87 does not emit light. Therefore, since the phototransistor 88 remains OFF and no current flows, the potential of A is the voltage of the internal DC power supply.

As shown in FIG. 5D, even when the ultrasonic horn 61 is closed with respect to the anvil 64, both side edge portions Fe, Fe of the packaging material are between the ultrasonic horn 61 and the anvil 64. When is not sandwiched, the ultrasonic horn 61 and the anvil 64 are in direct contact with each other and are in a conductive state, so that the voltage of the input terminal 85 is 0 V. In response to this, the photodiode 87 emits light, and the phototransistor 88 receives the light and its operation changes from OFF to ON. Since a current flows through the phototransistor 88, the potential of A becomes 0V. In the output circuit unit 82 of the detection circuit 80, the input circuit unit 81 is in a conductive state via the ultrasonic horn 61, the anvil 64, and the frame Mf (ON, and the ultrasonic horn 61 has the anvil 64 on both side edges Fe. , Fe is not sandwiched and is in contact) is output. In this way, by knowing the potential of A, it is possible to determine whether the ultrasonic horn 61 and the anvil 64 are in an electrically insulated state or a conductive state.

Therefore, the control device of the vertical sealing device (ultrasonic sealing device) 60 has the condition that the ultrasonic horn 61 is in a closed state (mechanically approaching) with respect to the anvil 64, and the detection circuit 80. In response to the fact that the input state of the input terminal 85 is in the OFF state in the input circuit unit 81, the condition is that the output circuit unit 82 of the detection circuit 80 outputs that fact (that it is OFF). Control to determine that the both side edge portions Fe and Fe of the packaging material exist in a pressure contact state between the ultrasonic horn 61 and the anvil 64, and cause the ultrasonic generation unit 63 of the vertical sealing device 60 to oscillate ultrasonic waves. Is performed, and ultrasonic sealing is performed on both side edge portions Fe and Fe of the packaging material. The control device oscillates ultrasonic waves to the ultrasonic wave generating unit 63 of the vertical sealing device 60 not only when both of the above conditions are not satisfied but also when only one of the above conditions is satisfied. Therefore, ultrasonic sealing is not performed on the side edge portions Fe and Fe of the packaging material.

In FIG. 6, in the vertical sealing device 60, whether the side edge portions Fe and Fe, which are the portions to be sealed of the substantially tubular curved packaging material, are present between the ultrasonic horn 61 and the anvil 64. Another example of an electrical detection circuit that detects whether or not it is shown. FIG. 6A is a diagram showing an example of an input circuit unit including the horn 61 and the anvil 64 of the detection circuit, and FIG. 6B is a diagram showing another example of the output circuit unit of the detection circuit. is there. Further, FIG. 6C shows a state in which the ultrasonic horn 61 and the anvil 64 are not electrically connected due to the presence of a packaging material between them when the ultrasonic horn 61 and the anvil 64 are closed. d) shows a state in which the ultrasonic horn 61 and the anvil 64 are electrically connected to each other because there is no packaging material between them when the ultrasonic horn 61 and the anvil 64 are closed.

The input circuit section 91 of the detection circuit 90 shown in FIG. 6A is the same as the input circuit section 81 of the detection circuit 80, and the ultrasonic horn 61 of the vertical sealing device 60 is the vertical bag making and packaging machine 1. It is electrically connected to the electrically grounded frame Mf. Further, the anvil 64 is attached in a state of being electrically insulated from the rotating arm 65 by interposing an insulating material 93. A wiring 94 having a relay coil 96 is connected to the anvil 64. The ultrasonic horn 61 and the anvil 64 are in the open state. An appropriate relay drive power supply is connected to the terminal 95 of the wiring 94.

The output circuit unit 92 shown in FIG. 6B includes a relay 97 that acts as a switch function that operates in response to the relay coil 96 of the input circuit unit 91. One terminal 95 of the relay contact 97 is grounded to the ground, and the other terminal 98 is connected to an input terminal of a control device (a control device of a packaging machine, which controls the vertical seal device 60) (not shown). To. When the ultrasonic horn 61 is not closed toward the anvil 64 and is in an open state, the relay coil 96 of the wiring 94 is in an OFF state due to the insulating action of the insulating material 93. Further, as shown in FIG. 6C, even when the ultrasonic horn 61 is closed with respect to the anvil 64, both side edge portions Fe of the packaging material between the ultrasonic horn 61 and the anvil 64 When, Fe is sandwiched, the relay coil 96 of the wiring 94 is in the OFF state due to the insulating action of the side edge portions Fe and Fe. If the ultrasonic horn 61 and the anvil 64 are not in contact with each other, the potential of B in the wiring 94 is the same as that of the relay drive power supply, so that the relay coil 96 is inoperable. When the ultrasonic horn 61 and the anvil 64 are in contact with each other, the potential of B is in the grounded state (0V), and the relay coil 96 operates. The contact of the relay 97 is closed according to the operation of the relay coil 96, and the potential of the input terminal 98 becomes 0V. In this way, by knowing the potential of B, it is possible to determine whether the ultrasonic horn 61 and the anvil 64 are in an electrically insulated state or a conductive state.

As shown in FIG. 6D, when the ultrasonic horn 61 is closed with respect to the anvil 64, both side edge portions Fe and Fe of the packaging material are placed between the ultrasonic horn 61 and the anvil 64. When not sandwiched, the ultrasonic horn 61 and the anvil 64 are in direct contact with each other and are in a conductive state, so that the relay coil 96 of the wiring 94 is in an ON state. At this time, the contact of the relay 97 is closed in the output circuit section 92 of the detection circuit 90, the potential of the input terminal 98 becomes 0V, and the input circuit section 91 is in a conductive state via the ultrasonic horn 61, the anvil 64, and the frame Mf. A certain effect (that it is ON) is output.

Therefore, the control device of the vertical sealing device (ultrasonic sealing device) 60 has the condition that the ultrasonic horn 61 is in a closed state (mechanically approaching) with respect to the anvil 64, and the detection circuit 90. In response to the fact that the state of the relay coil 96 is in the OFF state in the input circuit unit 91, and the condition that the output circuit unit 92 of the detection circuit 90 outputs that fact (that it is OFF), the packaging It is determined that Fe and Fe on both side edges of the material exist in a pressure contact state between the ultrasonic horn 61 and the anvil 64, and the ultrasonic generation unit 63 of the vertical sealing device 60 is controlled to oscillate ultrasonic waves. Then, ultrasonic seal is performed on both side edge portions Fe and Fe of the packaging material. The control device oscillates ultrasonic waves to the ultrasonic wave generating unit 62 of the vertical sealing device 60 not only when both of the above conditions are not satisfied but also when only one of the above conditions is satisfied. Therefore, ultrasonic sealing is not performed on the side edge portions Fe and Fe of the packaging material.

In the above embodiment, the ultrasonic horn 61 is directly attached to the frame Mf of the packaging machine, and the anvil 64 is attached to the frame Mf of the packaging machine via the insulating materials 83 and 93. The anvil 64 is directly attached to the frame Mf of the packaging machine, the ultrasonic horn 61 is attached to the frame Mf of the packaging machine via the insulating materials 83, 93, and the wirings 84, 94 are also provided for the input circuit portions 81, 91. It is clear that it may be connected to the ultrasonic horn 61 side.

1 Bag making filling and packaging machine 10 Feeding mechanism 20 Attached device 30 Former 31 Sailor part 32 Cylindrical part 33 Sailor body 34 Overlapping part 34a, 34a Tip edge part 35 Cylindrical body 36 Lower end 37 Slit 40 Horizontal sealing device 41, 41 Heat seal bar 45 Cutter mechanism 46 Cutter blade 47 Groove 50 Filling cylinder 51 Gap 60 Vertical seal device (ultrasonic seal device) 61 Ultrasonic horn 62 Ultrasonic generator 64 Anvil 64 Mounting arm 65 Rotating arm 66 Hinge 66 66a Support 68 Screw mechanism 68a Motor 68b Gear mechanism 68c Screw shaft 70 Packaging material Feeding device 71 Paper feed belt 72 Suction hole 73 Drive pulley 74 Driven pulley 75 Guide pulley 80 Detection circuit 81 Input circuit part 82 Output circuit part 83 Insulation material 84 Wiring 85 Input Terminal 86 Photocoupler 87 Photodiode 87 Phototransistor 90 Detection circuit 91 Input circuit part 92 Output circuit part 93 Insulation material 94 Wiring 95 Terminal 96 Relay coil 97 Relay 98 Input terminal 100 Vertical bag making and packaging machine 130 Former 150 Filling cylinder 160 Vertical Sealing means 170 Paper feeding means 180 Ultrasonic sealer Fr Winding roll Fw Band-shaped packaging material Ft Cylindrical packaging material Fe, Fe Both side edges Mf Frame P, P1, P2 Bag

Claims (3)

It has an ultrasonic horn and anvil that can sandwich both side edges of a substantially tubular packaging material that is curved from a strip-shaped packaging material, and by welding the both side edges by ultrasonic vibration. In a bag-making filling and packaging machine provided with an ultrasonic sealing device that vertically seals and forms a tubular packaging material, and a control device that controls the ultrasonic vibration of the ultrasonic sealing device.
One of the ultrasonic horn and the anvil is attached to a packaging machine frame that supports the ultrasonic sealing device via an insulating material.
The other of the ultrasonic horn and the anvil is grounded via the packaging machine frame.
An input wiring unit connected to the ultrasonic horn or the anvil attached to the packaging machine frame via the insulating material, and the ultrasonic wave to the control device in response to an input from the input wiring unit. horn and detection circuit and a output circuit section you output the conduction and non-conduction state is formed between the anvil,
The control device receives that the ultrasonic horn and the anvil are in a closed state due to close operation with each other , and that the output of the output circuit unit of the detection circuit is in the non-conducting state. A bag-making filling / packaging machine characterized in that it controls the oscillation of the ultrasonic vibration in response to being received at the same time. The input wiring unit is only wiring that connects the ultrasonic horn or the anvil and the output circuit unit attached to the packaging machine frame via the insulating material, and the output circuit unit is the input wiring. The bag-making filling / packaging machine according to claim 1, further comprising a photocoupler as a switching element that outputs to the control device in response to an input from a unit. The input wiring unit includes a relay coil arranged in a wiring connecting the ultrasonic horn or the anvil and the output circuit unit attached to the packaging machine frame via the insulating material. The bag-making filling / packaging machine according to claim 1, wherein the output circuit unit includes a relay that outputs a relay to the control device in response to an input from the relay coil.

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