JP4988109B2 - Packaging equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging device, in particular, a packaging device that pushes up an object to be wrapped from below on a tension-held film and folds the peripheral edge of the film to the lower side of the object to be heat-sealed, and a tray having an upper opening. On the other hand, the present invention relates to a packaging apparatus for covering an opening with a film in a state where an article to be packaged is accommodated in the tray, and heat-sealing the film around the opening periphery of the tray.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an apparatus that wraps an object to be packaged such as fresh food stored in a tray using foamed polystyrene with a stretch film is known as a stretch wrapping apparatus. In this stretch wrapping device, a stretch film having a predetermined width is cut into a predetermined length according to the size of the tray, and both side edges in the width direction of the film are held by a pair of feeders composed of upper and lower belts or the like. The film is then transported to the packaging station and film packaging is performed at the packaging station. At the packaging station, the peripheral portion of the film is pushed up with the product stored in the tray (hereinafter referred to as an object to be packaged) against the film that has been transported and held in tension, and the object to be packaged is in close contact with the film. Fold it into the bottom of the tray. Thereby, since the article to be packaged is wrapped in the stretch film, the film below the tray is then heat sealed to complete the packaging.
[0003]
In addition, the applicant of the present application has developed a top-seal type packaging device that has been published internationally (International Publication No. WO / 69725). In this packaging device, the tray containing the product is pushed up from below against the held film to generate tension on the film, and in this state, the contact portion between the tray flange and the film is heated by a heat roller or the like. Is welded to the flange and the film is cut outside the welded portion.
[0004]
[Problems to be solved by the invention]
In the above stretch packaging device and top-sealing type packaging device, the packaging of the package is finished by heat-sealing (heat-sealing) the film under the tray or heat-sealing the film to the flange of the tray. Yes. Therefore, the temperature of the heating member at the time of heat sealing greatly affects the quality of heat sealing. With regard to the temperature of this heating member, the conventional packaging device has a dial knob with the temperature stamped on the front, and the operator performs temperature setting and temperature adjustment of the heating member while looking at the actual packaging state. To be able to.
[0005]
However, in the case of an unskilled operator, it may take a long time to set the heating member to an appropriate temperature, or the temperature may be set higher and unnecessary energy may be consumed.
[0006]
Even if it is a case where the operator who is not skilled operates, the subject of this invention is setting a heating member (heat supply member) to an appropriate temperature in a packaging apparatus.
[0007]
[Means for Solving the Problems]
A packaging apparatus according to claim 1 is a packaging apparatus that pushes up an object to be packaged from below onto a tension-held film, folds the peripheral edge of the film below the object to be packaged, and heat-seals the roll supporting mechanism; And a film delivery mechanism, a film transport mechanism, a cutter mechanism, a folding mechanism, a pressing mechanism, a heat supply member, a storage unit, a control unit, and a discharge pusher. The roll support mechanism supports the film roll. The film delivery mechanism feeds the film from the film roll. The film transport mechanism transports the film fed out by the film feed mechanism and holds it in tension. The cutter mechanism cuts the film after being transported by a predetermined amount by the film transport mechanism. The folding mechanism folds the film to the lower side of the package. The pressing mechanism presses the object to be packaged in which the film is folded downward. The heat supply member applies heat to the film folded under the packaged object. Appropriate temperature data of the heat supply member is stored in the storage unit. This temperature data is set for each type of film. The control unit determines the temperature of the heat supply member based on the temperature data in the storage unit. The discharge pusher pushes an object to be packaged with the film folded downward onto a discharge table. The holding mechanism allows the film to be passed over the heat supply part while pressing the package from above while the package is pushed out to the discharge table by the discharge pusher, and further, the film folded under the package to be Heat sealing is performed by the heat supply member while being sandwiched between the heat supply member and the article to be packaged.
[0008]
Here, the heat supply member applies heat to the film folded under the package to perform heat sealing, and the temperature of the heat supply member is the temperature set for each type of film in the storage unit. Determined based on data. Therefore, it is not necessary for the operator to manually adjust the temperature of the heat supply member as in the conventional case, and troubles due to manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature is not determined. Is resolved.
[0009]
As described above, in the packaging device according to the present invention, even when an unskilled operator operates the heat supply member, the heat supply member is set to an appropriate temperature in the packaging device.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
A film transverse feed type stretch wrapping apparatus according to an embodiment of the present invention is shown in FIG. This packaging device 1 performs film packaging by pushing up a product G such as a fresh food product placed on a tray T against a stretch film F held in tension, and folding the periphery of the film F under the tray T. Device. In addition to the film packaging function, the packaging device 1 also has a weighing function and a pricing function by labeling.
[0011]
<Overall outline of the device>
As shown in FIGS. 1 and 2, the packaging device 1 includes a weighing-in mechanism 2, a packaging station 3, a roll support mechanism 4, a film delivery mechanism 5, a film transport mechanism 6, a folding mechanism 7, and a presser. A mechanism 81 and a heating mechanism 82 are provided.
[0012]
The weighing-in mechanism 2 is provided at the front center of the main body 1a. The packaging station 3 is a space formed in the main body 1a. The roll support mechanism 4 is disposed on both sides of the main body 1a and holds the film roll R, respectively. The film delivery mechanism 5 delivers the film F drawn from the film roll R upward. The film transport mechanism 6 receives the film F from the film delivery mechanism 5 and transports the film F to the packaging station 3. The folding mechanism 7 wraps an article to be packaged with the film F conveyed to the packaging station 3. The heating mechanism 82 applies heat to the film F folded under the package by the folding mechanism 7 to perform heat sealing.
[0013]
In addition, a control unit 9 including a computer having a display panel 94, operation keys 95, and the like is disposed on the main body 1a. The control unit 9 controls the operation of each mechanism described above, calculates the price of the product G based on a signal indicating the weight of the product G weighed by the weighing-in mechanism 2, and determines the weight of the product G. It controls the operation of the label printer 10 and the label issuing machine 11 for printing the price and the like on the label. The display panel 94 is a touch panel display, and operation buttons are also arranged on the panel. A storage unit 96 is also stored in the computer, and the storage unit 96 stores heating roller appropriate temperature data 96b set for each type of film F.
[0014]
<Weighing-in mechanism>
The weighing-in mechanism 2 includes a weighing device that measures the weight of a product G such as food stored in the tray T, and a plurality of loading belts stretched between a pair of rollers. The carry-in belt is provided with a conveying projection, and if the tray T containing the product G is placed on the weighing instrument (above the carry-in belt) as shown in FIG. After being weighed, the tray T is pushed by the protrusion of the carry-in belt and is sent onto a support member 33 of a lifter mechanism 30 (described later) of the packaging station 3.
[0015]
<Packaging station>
The packaging station 3 is a space in the main body 1a where a series of film packaging processes are performed on the product G in the tray T that has been weighed. In the packaging station 3, the stretch film F is stretched by the film transport mechanism 6, and the lifter mechanism 30 pushes up the tray T and the product G against the stretched film F. And the tray T and the goods G will be in the state covered with the film F by folding the surrounding part of the film F to the lower side of the tray T in the state where the folding mechanism 7 pushed up the film F.
[0016]
A lifter mechanism 30 for holding the bottom surface of the tray T and moving the tray T and the product G upward is provided at the lower portion of the packaging station 3.
[0017]
As shown in FIG. 3, the lifter mechanism 30 is rotatably supported on a support base 31, a plurality of support bars 32 fixed on the support base 31, and upper ends of the support bars 32. And a support member 33 for receiving the bottom surface. In addition, the lifter mechanism 30 includes an electric ball screw mechanism 34 that moves the support base 31 up and down.
[0018]
Each support bar 32 is provided with a hinge that bends forward, backward, left and right at the center thereof, and temporarily falls when left and right folding plates 76 and 77 and a rear folding plate 78 described below enter the lower portion of the tray T. Have been to.
[0019]
In addition, a holding mechanism 81 that serves to prevent the tray T and the product G from falling their postures and falling when the tray T and the product G are pushed up and stopped by the lifter mechanism 30 is disposed above the packaging station 3. Has been.
[0020]
<Roll support mechanism>
As shown in FIG. 2, the roll support mechanism 4 that supports the film roll R is provided approximately symmetrically on both sides of the main body 1a. The roll support mechanism 4 is mainly composed of a roll bar 4a.
[0021]
The roll bar 4a allows the film roll R to be inserted and holds the film roll R with a holder or the like. Each roll bar 4a is rotatably supported by the main body 1a and is driven by one film roll drive motor 4b. The film roll drive motor 4b can be rotated forward and backward, and drives one roll support mechanism 4 during forward rotation and the other roll support mechanism 4 during reverse rotation.
[0022]
<Film delivery mechanism>
The film delivery mechanism 5 is a mechanism for delivering the film F drawn from the film roll R to a pair of feeder units 61 and 62 of the film transport mechanism 6 described later. As shown in FIG. 2, the film feed mechanism 5 mainly includes a feed roller 51, a feed motor 52 that rotates the feed roller 51, a film insertion plate unit 53, and a film insertion plate that moves the film insertion plate unit 53 up and down. And a drive motor 54.
[0023]
The feeding roller 51 is a roller disposed obliquely above the film roll R held by the roll support mechanism 4 and outside the film roll R, and extends along the longitudinal direction of the film roll R. The feed roller 51 is connected to a feed motor 52 through a belt, and rotates by the operation of the feed motor 52.
[0024]
The film insertion plate unit 53 is mainly composed of two plate members, and is disposed above the film roll R supported by the roll support mechanism 4 as shown in FIG.
[0025]
The film insertion plate drive motor 54 is provided to move the film insertion plate unit 53 up and down, and moves the film insertion plate unit 53 up and down via a link mechanism.
[0026]
<Film transport mechanism>
The film transport mechanism 6 receives the film F fed by the film delivery mechanism 5 from the film roll R, transports the film F to the central portion of the packaging station 3, and holds the film F in tension. The film transport mechanism 6 mainly includes a first feeder unit 61, a second feeder unit 62, a first feeder moving unit 63, a second feeder moving unit 64, and a feeder driving unit 65.
[0027]
The first feeder unit 61 is disposed on the near side when viewed from the front of the apparatus 1, and the second feeder unit 62 is disposed on the other side when viewed from the front of the apparatus 1 (see FIG. 3). These first and second feeder units 61 and 62 sandwich both sides (front side and side on the opposite side) of the film F to be laterally fed between upper and lower belts, and operate the feeder drive unit 65 to hold the film F. Transport.
[0028]
The first feeder unit 61 is moved in the film width direction (left and right direction in FIG. 3) by the operation of the first feeder moving unit 63 and the second feeder unit 62 is moved by the operation of the second feeder moving unit 64, respectively. It is configured. Each of the feeder units 61 and 62 is supported by two slide shafts 66 and 67 extending along the film width direction so as to be movable in the film width direction.
[0029]
Although not shown, the first and second feeder units 61 and 62 have a plurality of clamps. These clamps are actuated by solenoids to hold and release the film F.
[0030]
<Cutter mechanism>
A cutter mechanism 69 is provided on the front side of the film transport mechanism 6 in the film transport direction. The cutter mechanism 69 cuts the film F between the mechanisms 5 and 6 after the film F transferred from the film delivery mechanism 5 to the film transport mechanism 6 is transported by a predetermined amount by the film transport mechanism 6. Is provided. The cutter mechanism 69 has a cutting blade 69a longer than the film width, and cuts the film F by moving the cutting blade 69a with an actuator.
[0031]
<Folding mechanism>
As shown in FIGS. 2 and 3, the folding mechanism 7 mainly includes left and right folding plates 76 and 77, a rear folding plate 78, and a front folding rod 79.
[0032]
The left and right folding plates 76 and 77 fold both ends of the film F in the film transport direction to the lower side of the tray T, and can be moved horizontally by a motor and a timing belt (not shown).
[0033]
The rear folding plate 78 folds the side portion of the film F on the second feeder unit 62 side to the lower side of the tray T, and can be moved horizontally by a motor and a timing belt (not shown).
[0034]
The front folding bar 79 is arranged so that the side of the film F on the first feeder unit 61 side is folded below the tray T when the tray T is discharged by the discharge pusher 79a that pushes the tray T toward the discharge table 83. Has been.
[0035]
As shown in FIG. 2, the discharge pusher 79a is divided into left and right parts so as not to interfere with the pressing roller 106 and the pressing plate 104 of the pressing mechanism 81 described later.
[0036]
<Pressing mechanism>
As shown in FIG. 3, the pressing mechanism 81 includes a servo motor (or torque motor) 101, two arms 103, a pressing plate 104, a pressing roller 106, and the like.
[0037]
Here, the arm 103 is rotated by the drive of the servo motor 101, and the height positions of the pressing plate 104 and the pressing roller 106 are changed. The holding plate 104 is always held by the arm 103 so as to be substantially parallel to the horizontal plane. The pressing roller 106 is a sponge-like roller made of silicon as a raw material, and is rotatably supported at the tip of the pressing plate 104 via a connecting member 105. Further, as shown in FIG. 3, the pressing roller 106 is positioned substantially immediately above the heating roller 112 described later in plan view.
[0038]
The pressing mechanism 81 pushes the product G and the tray T to the heating roller 112 when the heating mechanism 82 heat seals the film F folded under the tray T while pushing the tray T to the discharge table 83 by the discharge pusher 79a. It plays a role of pressing. At this time, the servo motor 101 is driven by a command from the control unit 9 to be described later so that the pressing force and the pressing time suitable for the properties of the product G, the tray T, and the film F are reached, and the arm 103 is directed downward to the pressing plate 104. The pressing force acts on the product G and the tray T from the pressing roller 106.
[0039]
Further, as described above, the holding mechanism 81 has a role of preventing the tray T and the product G from falling their postures and falling when the tray T and the product G are pushed up by the lifter mechanism 30 and stopped. Fulfill.
[0040]
<Heating mechanism>
As shown in FIG. 4, the heating mechanism 82 includes a conveyance roller 111, a heating roller 112, a heater 113, a roller support member 114, a heater support member 115, a temperature sensor 116, and the like. A plurality of conveying rollers 111 are arranged before and after the two heating rollers 112. A pair of left and right roller support members 114 rotatably supports both ends of the rollers 111 and 112. The heating roller 112 is formed in a cylindrical shape, and a columnar electric heater 113 is inserted therein. The heater 113 is a so-called cartridge heater, is not in contact with the heating roller 112, and both ends are fixed to the heater support member 115. An electrode 119 is provided at one end of these heaters 113, and energization from the electrode 119 generates heat in the heating coil in the heater 113.
[0041]
The heating roller 112 is in contact with a temperature sensor 36 that detects the temperature of the outer surface. The temperature sensor 36 sends the temperature of the heating roller 112 to the control unit 9.
[0042]
<Control unit>
The control unit 9 in the computer disposed on the upper part of the main body 1a is configured as shown in FIG. 5, and the operations of the mechanisms 2, 5, 6, 30, 7, 81, 82, 10, 11 are performed. Control. The control unit 9 includes a CPU 91, a ROM 92, a RAM 93, a touch panel display panel 94, operation keys 95, and the like, and is connected to a storage unit 96 that stores various data. Inputs from the main power switch 16, the heater power switch 17, the emergency stop switch 19, and the like are also transmitted to the control unit 9.
[0043]
<Storage unit>
As shown in FIG. 5, the storage unit 96 includes a film data file 96a for storing data relating to properties of a plurality of types of films F, and an appropriate temperature data file 96b for the heating roller 112 set for each film type. Has been. The film data file 96a stores data such as the thickness, material, and film width of the film F. The appropriate temperature data file 96b stores a table shown in FIG. As shown in FIG. 6, in the table in the appropriate temperature data file 96b, appropriate temperature data of the heating roller 112 in heat sealing is set for several types of films that can be used. Specifically, a set temperature of 155 ° C. for a film made of vinyl chloride with film number 1 and a set temperature of 135 ° C. for a film made of polyester I with film number 2 are polyesters with film number 3. A set temperature of 135 ° C. is stored as data for the II film.
[0044]
<Outline of operation of packaging device>
Next, operation | movement of the packaging apparatus 1 which has the above structures is demonstrated easily.
[0045]
In the apparatus 1, when the operator places the tray T containing the product G on the weighing instrument of the weighing-in mechanism 2, the loading belt starts moving after the weighing value is stabilized and the weighing is completed. The projection fixed to the carry-in belt moves according to the movement of the carry-in belt, and pushes out the tray T on which the product G is placed onto the support member 33 of the lifter mechanism 30.
[0046]
On the other hand, the film F transferred from the film roll R to the film transport mechanism 6 by the film delivery mechanism 5 is cut by the cutting blade 69a of the cutter mechanism 69 to become one rectangular film F, and the lifter mechanism 30 It is carried by the both feeder units 61 and 62 to the upper side. Then, above the lifter mechanism 30, the periphery of the film F is strongly held by the operation of each clamp.
[0047]
And the lifter mechanism 30 pushes up the goods G and the tray T with respect to the film F with which the circumference | surroundings, especially both sides were hold | maintained strongly in this way. Then, the film F that is strongly held in the periphery is stretched so as to cover the top of the product G and the tray T.
[0048]
In this state, when the rear folding plate 78 and the left and right folding plates 76 and 77 move horizontally to the lower side of the tray T, the clamps other than the clamp on the front side release the holding of the film F at an appropriate timing, and the film F 3 sides are folded into the lower side of the tray T. When the discharge pusher 79a pushes the tray T toward the discharge table 83, one side of the film F on the front side that has not been folded hits the front folding bar 79, and the tray T moves toward the discharge table 83 as the tray T moves. It will be folded under T. The clamp on the front side releases the film F at this time. Further, during this movement, when the film F folded under the tray T is heat-sealed and discharged to the position shown in FIG. 3 (above the discharge table 83), the product G and the entire tray T are transferred to the film F. The packaging is covered.
[0049]
Furthermore, when processing including labeling is selected, the price or weight of the product calculated based on the measured value is printed on the label by the label printer 10 and the label is packaged by the label issuing machine 11 The product G and the tray T are attached.
[0050]
<Details of operation during heat sealing>
As described above, while the discharge pusher 79a pushes the tray T toward the discharge table 83, the film F folded under the tray T is heat-sealed. The operation at the time of heat sealing will be described in more detail.
[0051]
The tray T passes over the heating roller 112 of the heating mechanism 82 while the tray T is pushed out toward the discharge table 83 by the discharge pusher 79a. At this time, the film F folded under the tray T receives heat from the heating roller 112 and is heat-sealed. Further, when the tray T passes over the heating roller 112, a command is issued from the control unit 9 to drive the servo motor 101 with a predetermined output for a predetermined time period. As a result, the product G contained in the tray T is pressed down, and the film F that is indirectly folded below the tray T is strongly sandwiched between the heating roller 112 and the tray T. The heating roller 112 is strongly pressed.
[0052]
Further, the temperature of the heating roller 112 of the heating mechanism 82 is controlled by the control unit 9 so as to be the set temperature in the table in the appropriate temperature data file 96b shown in FIG. The control unit 9 discriminates the type of the film F that is currently used from manual input information, external input information, or information obtained from a sensor or the like, and uses the table shown in FIG. The temperature of the roller 112 is determined. And the control part 9 controls the heater 113 in the heating roller 112 specifically, so that it may become the preset temperature which the heating roller 112 determined. This eliminates the need for the operator to manually adjust the temperature of the heating roller 112 as in the prior art, and causes problems due to manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature cannot be determined. That is solved.
[0053]
[Second Embodiment]
<Outline of device>
A packaging device according to an embodiment of the present invention is shown in FIG. The packaging device 201 shown here covers the upper opening of the tray T containing fresh foods such as meat and fish and processed foods such as prepared dishes with the film Fm, and the flange and the film Fm positioned around the opening of the tray T. This is a so-called top-seal type packaging device that is heat-sealed and sealed.
[0054]
<Device configuration>
The packaging device 201 mainly includes a frame 201 a, a holding member 202 that holds the tray T, four heating rollers 203 positioned above the holding member 202, and a film between the holding member 202 and the heating roller 203. A film supply mechanism 205 that supplies Fm, a lift mechanism 206 that moves the holding member 202 up and down, a roller movement mechanism 207 that mainly moves the heating roller 203 up and down, a roller turning mechanism 208 that turns the heating roller 203, and each mechanism And a control unit (not shown) that performs the above control.
[0055]
The holding member 202 holds the tray T on its upper surface, and is raised and lowered by the lift mechanism 206. The operation of placing the tray T on the holding member 202 may be performed manually by an operator, or may be automatically transferred from a separately prepared tray T conveyance device. Good.
[0056]
The heating roller 203 is a cylindrical member, and is rotatably supported by a roller support portion 271 of a roller moving mechanism 207 described later. On the surface of the heating roller 203, a softer layer than other portions is formed in order to reduce the frictional resistance with the film Fm. Specifically, the surface of the heating roller 203 is formed of an elastic material such as resin or synthetic rubber. Four of these heating rollers 203 are provided radially with respect to a rotation shaft 281 of a roller turning mechanism 208 described later, and are inclined with respect to the upper surface of the tray T parallel to the horizontal plane when viewed from the side. It is supported by the roller support portion 271.
[0057]
In addition, a heater (not shown) for heating the heating roller 203 is disposed inside the heating roller 203. Based on the data table shown in FIG. 6 stored in a storage unit (not shown), the control unit responds to the type of film Fm so that the heating roller 203 has an appropriate temperature set for each type of film. To control the heater.
[0058]
The film supply mechanism 205 is a mechanism that feeds out an amount of film Fm suitable for the size of the tray T between the holding member 202 and the heating roller 203 in a lowered state. The film supply mechanism 205 includes a set unit 251 for setting the film Fm, a transport unit that transports the film Fm and can sandwich the film Fm, and the remaining film Fm partially extracted by the packaging of the tray T. It is comprised from the winding-up part 253 to wind up. The set part 251, the conveyance part, and the winding part 253 are each supported by the frame 201a. The conveyance unit includes conveyance rollers 252a and 252b arranged so as to sandwich the space between the holding member 202 and the heating roller 203, pressing rollers 252c and 252d that are pressure-bonded to these rollers, and the vicinity of both ends of the conveyance rollers 252a and 252b. The two belts B1 are respectively stretched over the belts, and the two belts B2 are respectively spanned near both ends of the pressing rollers 252c and 252d. In the film supply mechanism 205, the film Fm set on the setting unit 251 is conveyed by the belt B1 that is stretched around the transport rollers 252a and 252b and the two belts B2 that are stretched around the pressing rollers 252c and 252d. To the winding unit 253. The transport rollers 252a and 252b and the winding unit 253 are operated by a driving unit including a motor (not shown).
[0059]
The belt B1 that conveys the film Fm has a grip property with respect to the film Fm, and has a structure that allows the film Fm to be sandwiched between the belt B2 that is stretched around the pressing rollers 252c and 252d. ing.
[0060]
The lift mechanism 206 is a mechanism for pushing up the tray T with respect to the film Fm, and includes a drive motor 261, a fixed portion 262 fixed to the frame 201a, and a moving portion 263 that moves up and down with respect to the fixed portion 262. It consists of and. The holding member 202 is fixed to the upper surface of the moving unit 263. That is, the tray T placed on the holding member 202 moves up and down as the moving unit 263 moves.
[0061]
The roller moving mechanism 207 is a mechanism for changing the height position of the heating roller 203, and as shown in FIG. 1, a roller support portion 271 that supports the heating roller 203, a link mechanism 272, and a pressing plate 273. And a lever mechanism 274 for applying a force to the holding plate 273 from above and a motor 275 for operating the lever mechanism 274. The roller support portion 271 supports the heating roller 203 so that the heating roller 203 is inclined as shown in FIG. One end of the link mechanism 272 pin-supports the roller support portion 271, and the other end is pushed down by the pressing plate 273. When the pressing plate 273 no longer applies force to the link mechanism 272, the other end of the link mechanism 272 is lowered by the weight of the roller support portion 271 and the heating roller 203. The holding plate 273 is a disk-like member that can move up and down along a rotation shaft 281 of a roller turning mechanism 208 described later, and a force is applied from above by a lever mechanism 274 operated by a motor 275.
[0062]
The roller turning mechanism 208 is a mechanism for turning the heating roller 203 and the roller support portion 271 and the link mechanism 272 that support the heating roller 203 by a predetermined angle at the time of seal packaging, and includes a rotating shaft 281 and a motor 282 that rotates the rotating shaft 281. It is composed of The rotating shaft 281 has a lower end fixed to a base member 279 that supports the link mechanism 272, and an upper end connected to the motor 282 by a timing belt and a pulley (not shown). When the motor 282 rotates the rotation shaft 281 by a predetermined angle under the control of the control unit, each heating roller 203 turns by a predetermined angle with the rotation shaft 281 as the rotation center.
[0063]
<Operation control of device>
As shown in FIG. 7, when the tray T is placed on the holding member 202, the control unit first feeds out the film Fm from the film supply mechanism 205 and holds the film Fm above the tray T by the belt B1 and the belt B2.
[0064]
When the control unit raises the moving unit 263 of the lift mechanism 206, the tray T pushes up the film Fm and stops. At this time, tension is applied to the film Fm by pushing up the tray T.
[0065]
Next, the control unit controls the motor 275 to release the downward urging of the pressing plate 273 by the lever mechanism 274, and opens the link mechanism 272. Then, the heating roller 203 moves until it contacts the tray T by its own weight. Since these heating rollers 203 are independent of each other, each heating roller 203 comes into contact with the tray T with substantially the same pressure.
[0066]
The control unit controls the motor 275 to bring the heating roller 203 into contact with the tray T, and simultaneously controls the motor 282 to rotate the rotating shaft 281 by a predetermined angle. Since this predetermined angle is set to 90 ° because four heating rollers 203 are provided at equal intervals in the rotation direction, the entire periphery of the tray T can be sealed by any one of the heating rollers 203. Here, the angle is set to 100 ° with a slight margin. When the heating roller 203 starts to rotate in conjunction with the rotation shaft 281, the heating roller 203 moves so as to trace the periphery of the tray T, and the tray T and the film Fm are thermally fused and sealed. At this time, the heating roller 203 moves while rolling on the flange. At this time, the heat and force concentrate on the film Fm at the edge portion of the tray T (here, the top of the flange against which the heating roller 203 hits), so that the film Fm is melted and separated at the edge portion of the tray T. .
[0067]
When the sealing of the film Fm to the tray T by the heating roller 203 is finished, the heating roller 203 is pulled up and the tray T is lowered by the lift mechanism 206. Then, the sealed and sealed tray T is taken out from the holding member 202, and the next cycle. Move on. When moving to the next cycle, the film Fm that has been partially melted and cut out by the seal wrapping of the tray T is taken up by driving the take-up unit 253. Note that the width of the film Fm is set wider than the width of the tray T, and the continuity of the film Fm is not interrupted by the seal wrapping of the tray T, and a problem that the winding by the winding unit 253 cannot be performed occurs. do not do.
[0068]
<Features of the device>
In the packaging apparatus 201, the control unit sets the heater for heating the heating roller 203 to the film Fm so that the heating roller 203 has an appropriate temperature set for each type of film based on data as shown in FIG. Control according to the type. That is, the control unit discriminates the type of film Fm that is currently used based on manually input information, external input information, or information obtained from a sensor or the like, and uses the table shown in FIG. The temperature of the heating roller 203 is determined. This eliminates the need for the operator to manually adjust the temperature of the heating roller 203 as in the prior art, and causes problems due to manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature cannot be determined. That is solved.
[0069]
【Effect of the invention】
In the present invention, the temperature of the heat supply member is automatically determined based on the temperature data set for each type of film in the storage unit. It is no longer necessary to adjust the temperature manually, and problems due to manual adjustment, i.e., it takes a long time to determine the temperature or an appropriate temperature cannot be determined can be solved. That is, in the packaging apparatus according to the present invention, even when an unskilled operator operates, the heat supply member is set to an appropriate temperature in the packaging apparatus.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a packaging device according to an embodiment of the present invention.
FIG. 2 is a schematic front view of the inside of the packaging apparatus.
FIG. 3 is a schematic view taken along the line III-III in FIG. 2;
FIG. 4 is a plan view of a heating mechanism.
FIG. 5 is a block configuration diagram of a control unit.
FIG. 6 is a table of appropriate temperature data of the heating roller for each film type.
FIG. 7 is a schematic view of a packaging device according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging apparatus 9 Control part 96 Memory | storage part 96a Film data 96b Heating roller 112 according to film kind Heating roller (heat supply member)
201 Packaging Equipment 203 Heating Roller (Heat Supply Member)
F, Fm film

Claims (1)

A packaging device that pushes up an object to be wrapped from below on a tension-held film and folds the peripheral edge of the film to the lower side of the object to be heat-sealed,
A roll support mechanism for supporting the film roll;
A film delivery mechanism for delivering the film from the film roll;
A film transport mechanism for transporting the film fed by the film feed mechanism and holding the tension;
A cutter mechanism for cutting the film after being transported by a predetermined amount by the film transport mechanism;
A folding mechanism for folding the film into the lower side of the article to be wrapped;
A pressing mechanism for pressing the packaging object in which the film is folded downward;
A heat supply member for applying heat to the film folded under the packaged item;
A storage unit for storing appropriate temperature data of the heat supply member set for each type of the film,
A control unit for determining the temperature of the heat supply member based on the temperature data in the storage unit;
A discharge pusher for extruding the packaged object in which the film is folded downward to a discharge table;
With
The pressing mechanism, while the articles to be packaged by the discharge pusher is pushed out to the discharge table, the material to be packaged is passed over the heat supply unit while pressing from above, further, the material to be packaged the film folded on the lower side, is heat-sealed by the heat supply member in a state of being sandwiched between the heat supply member and the material to be packaged,
Packaging equipment.

Images