JP2003095207A - Packaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to set a heat roller of a packaging apparatus to a proper temperature even when an unexperienced operator operates the apparatus. SOLUTION: In the packaging apparatus, an object to be packaged is pushed up to a film retained in a stretched manner, and the periphery of the film is tucked in under the object and is sealed with heat. The packaging apparatus comprises a heat roller for applying heat to the film tucked in under the object, a memory section 96 for storing respective proper temperature data 96b of the heat roller, which is set for every type of the film, and a control section 9 for deciding the temperature of the heat roller based on the temperature data 96b stored in the memory section 96.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a packaging device, in particular
A packaging device that pushes up the packaged object from below onto the film that has been tensioned, folds the peripheral edge of the film to the lower side of the packaged object, and heat seals it, and, for a tray with an open top, package the packaged object in the tray. The present invention relates to a packaging device for covering an opening with a film in a housed state and heat-sealing the film around the opening of a tray.

[0002]

2. Description of the Related Art Conventionally, an apparatus for wrapping an article to be wrapped, such as fresh food, stored in a tray made of Styrofoam 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 a tray, and both side edges in the width direction of the film are held by a pair of feeders including upper and lower belts. While carrying the film to the packaging station, the film is packaged at the packaging station. At the packaging station, the product stored in the tray (hereinafter referred to as the product to be packaged) is pushed up against the film that has been conveyed and is held under tension, and the film is held in close contact with the film while the peripheral edge of the film is being pressed. Fold the bottom of the tray.
As a result, the article to be packaged is wrapped in the stretch film, and then the film below the tray is heat-sealed to complete the packaging.

The applicant of the present application has previously developed a top-seal type packaging device as disclosed in the international publication (International Publication Number WO / 69725). In this packaging device,
The tray containing the product is pushed up from below against the held film to generate tension in the film, and in that state, the contact part between the flange of the tray and the film is heated by a heat roller etc., and the film is welded to the flange. At the same time, the film is fused off on the outside of the welded portion.

[0004]

SUMMARY OF THE INVENTION In the above stretch wrapping apparatus and top seal type wrapping apparatus, the film is heat-sealed (heat-sealed) under the tray or the flange of the tray is heat-sealed. The packaging of the items to be packaged is completed. Therefore, the temperature of the heating member at the time of heat sealing has a great influence on the quality of heat sealing. Regarding the temperature of this heating member, in the conventional packaging device, a dial knob that has a temperature stamped on the front is provided, and the operator can set the temperature and adjust the temperature of the heating member while observing the actual packaging state. I am able to

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 to a high temperature, resulting in unnecessary energy consumption. is there.

An object of the present invention is to ensure that the heating member (heat supply member) in the packaging apparatus is set to an appropriate temperature even when it is operated by an unskilled operator.

[0007]

According to a first aspect of the present invention, there is provided a packaging apparatus, wherein a film to be tensioned is pushed up from below to be packaged, and a peripheral edge of the film is folded under the package to be heat-sealed. The device includes a heat supply member, a storage unit, and a control unit. The heat supply member applies heat to the film folded under the object to be packaged. 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 stored in the storage unit.

[0008] Here, the heat supply member applies heat to the film folded under the object to be packaged to perform heat sealing.
The temperature of the heat supply member is determined based on the temperature data set for each type of film in the storage unit. Therefore, unlike the conventional case, the operator does not need to manually adjust the temperature of the heat supply member, and troubles caused by the manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature is not determined. Is eliminated.

As described above, in the packaging apparatus according to the present invention, the heat supply member can be set to an appropriate temperature in the packaging apparatus even when an unskilled operator operates it.

According to a second aspect of the present invention, there is provided a packaging apparatus, in which a tray having an open upper portion is covered with a film in a state where an object to be packaged is accommodated in the tray and the film is heat-sealed around the opening of the tray. An apparatus comprising a heat supply member,
A storage unit and a control unit are provided. The heat supply member applies heat to the contact portion between the opening peripheral portion of the tray and the film. The storage unit stores appropriate temperature data of the heat supply member set for each type of film. The control unit determines the temperature of the heat supply member based on the temperature data stored in the storage unit.

Here, the heat supply member applies heat to the contact portion between the film around the opening of the tray and the film to perform heat sealing. The temperature of the heat supply member is set for each type of film in the storage unit. It is decided based on the temperature data obtained.
Therefore, unlike the conventional case, the operator does not need to manually adjust the temperature of the heat supply member, and troubles caused by the manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature is not determined. Is eliminated.

As described above, in the packaging apparatus according to the present invention, the heat supply member can be set to an appropriate temperature in the packaging apparatus even when an unskilled operator operates it.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows a film transverse feed type stretch wrapping apparatus according to an embodiment of the present invention. 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 stretched film F held in tension and folding a peripheral portion of the film F below the tray T. It is a device. In addition to the film wrapping function, the wrapping device 1 also has a weighing function and a pricing function by labeling.

<Overall Outline of Apparatus> As shown in FIGS. 1 and 2, the packaging apparatus 1 includes a weighing-in / in mechanism 2, a packaging station 3, a roll support mechanism 4, a film feeding mechanism 5, and a film transport mechanism. 6, a folding mechanism 7, a pressing mechanism 81, and a heating mechanism 82.

The weighing-in / carrying-out mechanism 2 is provided at the center of the front surface of the main body 1a. The packaging station 3 is a space formed in the main body 1a. The roll support mechanism 4 includes the main body 1
It is arranged on both sides of a and holds the film rolls R respectively. The film feeding mechanism 5 feeds 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 is used in the packaging station 3
The object to be packaged is packaged by the film F conveyed to. The heating mechanism 82 applies heat to the film F folded under the article to be packaged by the folding mechanism 7 to perform heat sealing.

A display panel 9 is provided on the upper portion of the main body 1a.
4, a control unit 9 including a computer having operation keys 95 and the like is arranged. The control unit 9 controls the operation of each of the above-mentioned mechanisms and calculates the price of the product G based on a signal indicating the weight of the product G weighed by the weighing-in / carrying-in mechanism 2 to calculate the weight of the product G and It controls the operation of the label printer 10 and the label issuing machine 11 which print the price and the like on the label. The display panel 94 is a touch panel type display, and operation buttons are also arranged on the panel. Further, a storage unit 96 is also housed in the computer, and the storage unit 96 stores appropriate temperature data 96b of the heating roller set for each type of the film F.

<Weighing-in / carrying-in mechanism> The weighing-in / carrying-in mechanism 2 has a weighing machine for weighing the weight of a product G such as food stored in the tray T, and a plurality of carrying-in belts stretched between a pair of rollers. is doing. The carry-in belt is provided with a protrusion for carrying, and if the tray T containing the product G is placed on the weighing machine (above the carry-in belt) as shown in FIG. 3, the weight of the product G is measured by the weighing machine. After being weighed, the tray T is pushed by the protrusions of the carry-in belt and sent onto the support member 33 of the lifter mechanism 30 (described later) of the packaging station 3.

<Packing station> Packaging station 3
Is a space in the main body 1a for performing a series of film wrapping processing on the product G in the tray T after weighing. In this packaging station 3, the stretch film F is stretched by the film transport mechanism 6, and the stretched film F is stretched.
On the other hand, the lifter mechanism 30 pushes up the tray T and the product G. Then, the folding mechanism 7 folds the peripheral portion of the film F to the lower side of the tray T in a state where the film F is pushed up, so that the tray T and the product G are covered with the film F.

At the lower part of the packaging station 3, there is provided a lifter mechanism 30 for holding the bottom surface of the tray T and moving the tray T and the product G upward. As shown in FIG. 3, the lifter mechanism 30 includes a support base 31.
And a plurality of support bars 32 fixed on the support base 31.
And a support member 33 that is rotatably supported on the upper ends of the support bars 32 and receives the bottom surface of the tray T. Further, the lifter mechanism 30 is provided with an electric ball screw mechanism 34 for moving the support base 31 up and down in the lower part.

Each support bar 32 has a hinge at the center thereof which can be bent back and forth and left and right, and the left and right folding plates 76, 77 and the rear folding plate 78, which will be described later, are mounted on the tray T.
It is supposed to tip over temporarily when entering the lower part of the.

Further, on the upper part of the packaging station 3, when the tray T and the product G are pushed up by the lifter mechanism 30 and stopped, a holding mechanism for preventing the tray T and the product G from losing their postures and falling down. 81 are arranged.

<Roll Support Mechanism> The roll support mechanism 4 for supporting the film roll R is, as shown in FIG.
It is provided substantially symmetrically on both sides of a. The roll support mechanism 4 is mainly composed of a roll bar 4a.

The film roll R can be inserted through the roll bar 4a, and the film roll R can be held by a holder or the like. Further, the roll bars 4a are respectively provided in the main body 1a.
It is rotatably supported by and is driven by one film roll drive motor 4b. The film roll drive motor 4b can rotate in the forward and reverse directions,
One roll support mechanism 4 is driven during forward rotation, and the other roll support mechanism 4 is driven during reverse rotation.

<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 feeding mechanism 5 mainly includes a feeding roller 51, a feeding motor 52 that rotates the feeding roller 51, and a film insertion plate unit 5.
3 and a film insertion plate drive motor 54 for vertically moving the film insertion plate unit 53.

The feeding roller 51 is the roll supporting mechanism 4
The roller is disposed obliquely above the film roll R held on the outside of the film roll R and extends along the longitudinal direction of the film roll R. The delivery roller 51 is connected to a delivery motor 52 via a belt, and is rotated by the operation of the delivery motor 52.

The film insertion plate unit 53 is mainly composed of two plate members, and is arranged above the film roll R supported by the roll support mechanism 4, as shown in FIG.

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.

<Film Transport Mechanism> Film transport mechanism 6
Is the film feeding mechanism 5 from the film roll R.
The film F fed out by is received, is conveyed to the central part of the packaging station 3, and the film F is further tension-held. The film transport mechanism 6 mainly
First feeder unit 61 and second feeder unit 6
2, a first feeder moving unit 63, a second feeder moving unit 64, and a feeder driving unit 65.

The first feeder unit 61 is on the front side when viewed from the front of the apparatus 1, and the second feeder unit 62 is on the apparatus 1 side.
Is located on the other side when viewed from the front (see FIG. 3). These first and second feeder units 61,
62 sandwiches both side parts (front side and far side part) of the laterally fed film F with upper and lower belts, and conveys the film F by the operation of the feeder drive unit 65.

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. Is configured to. Each of the feeder units 61 and 62 is movably supported at two locations in the film width direction by slide shafts 66 and 67 extending along the film width direction.

Although not shown, the first and second
The feeder units 61 and 62 have a plurality of clamps. These clamps are operated by solenoids to hold and release the film F.

<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 is for cutting 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 the film transport mechanism 6 by a predetermined amount. It 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.

<Folding Mechanism> The folding mechanism 7 is shown in FIG.
As shown in FIG. 3 and FIG.
6, 77, a rear folding plate 78, and a front folding rod 79.

The left and right folding plates 76 and 77 are formed of the film F.
Both ends of the film transport direction are folded under the tray T, and can be moved horizontally by a motor and timing belt (not shown).

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 horizontally moved by a motor and timing belt (not shown).

The front folding bar 79 allows the tray T to be discharged from the tray 8.
When the tray T is ejected by the ejection pusher 79a which is pushed out toward the 3rd direction, the first feeder unit 61 of the film F is
The side portions on the side are arranged so as to be folded under the tray T.

As shown in FIG. 2, the discharge pusher 79a is divided into two right and left so as not to interfere with a pressing roller 106 and a pressing plate 104 of a pressing mechanism 81 described later.

<Pressing Mechanism> As shown in FIG. 3, the pressing mechanism 81 includes a servomotor (or torque motor) 1
01, two arms 103, a pressing plate 104, a pressing roller 106, and the like.

Here, the arm 103 is rotated by the driving of the servo motor 101, and the height positions of the pressing plate 104 and the pressing roller 106 are changed. The pressing plate 104 is held by the arm 103 so that it is always substantially parallel to the horizontal plane. Pressing roller 106
Is a sponge-like roller made of silicon as a raw material, and is rotatably supported by the tip of the pressing plate 104 via the connecting member 105. In addition, the pressing roller 1
As shown in FIG. 3, 06 is located substantially directly above the heating roller 112, which will be described later, in plan view.

This pressing mechanism 81 is used for the discharge pusher 7
When the film F folded under the tray T is heat-sealed by the heating mechanism 82 while the tray T is being pushed out to the discharge table 83 by the 9a, the product G and the tray T are pressed against the heating roller 112. At this time, the servo motor 101 is driven by a command from the control unit 9 described later so that the pressing force and the pressing time match the properties of the product G, the tray T, and the film F, and the arm 103 moves downward to the pressing plate 104. Force acts on the product G and the tray T from the pressing roller 106 to exert a force.

The pressing mechanism 81 is, as described above,
The pressing mechanism 81 plays a role of suppressing 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.

<Heating Mechanism> As shown in FIG. 4, the heating mechanism 82 includes a conveying roller 111, a heating roller 112, a heater 113, a roller supporting member 114, and a heater supporting member 1.
15, a temperature sensor 116 and the like. A plurality of transport rollers 111 are arranged before and after the two heating rollers 112. Left and right pair of roller support members 114
Rotatably supports both ends of each roller 111, 112. Further, the heating roller 112 is formed in a tubular shape, and a cylindrical electric heater 113 is inserted inside the heating roller 112. The heater 113 is a so-called cartridge heater, and is not in contact with the heating roller 112,
Both ends are fixed to the heater support member 115. An electrode 119 is provided at one end of each of the heaters 113, and when electricity is supplied from the electrode 119, the heating coil inside the heater 113 generates heat.

Further, a temperature sensor 36 for detecting the temperature of the outer surface of the heating roller 112 is in contact therewith. The temperature sensor 36 controls the temperature of the heating roller 112 by the control unit 9.
Send to.

<Control Unit> The control unit 9 in the computer arranged above the main body 1a is constructed as shown in FIG. 5, and each mechanism 2, 5, 6, 30, 7, 81, 82, 1
Each operation of 0 and 11 is controlled. The control unit 9 has a CPU 9
1, a ROM 92, a RAM 93, a touch panel type display panel 94, operation keys 95, and the like, and are connected to a storage unit 96 in which various data are stored. 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.

<Storage Unit> As shown in FIG. 5, the storage unit 96 stores a film data file 96a in which data relating to the properties of a plurality of types of films F is stored, and an appropriate heating roller 112 set for each film type. The temperature data file 96b is arranged. The film data file 96a stores data such as the thickness and material of the film F and the film width. The table shown in FIG. 6 is stored in the appropriate temperature data file 96b. 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 each of several types of films that can be used. Specifically, the set temperature of 155 ° C. is set for the film made of vinyl chloride of film number 1, and the set temperature of 135 ° C. is set for the film made of polyester I of film number 2, A preset temperature of 135 ° C. is stored as data for the II film.

<Outline of the operation of the packaging device> Next, the operation of the packaging device 1 having the above configuration will be briefly described. In the present device 1, when the operator places the tray T containing the products G on the weighing device of the weighing-in / carrying-in mechanism 2, the carry-in belt starts moving after waiting for the weighing value to stabilize and the weighing to be completed. The protrusions fixed to the carry-in belt move according to the movement of the carry-in belt, and the tray T on which the product G is placed is pushed onto the support member 33 of the lifter mechanism 30.

On the other hand, the film F transferred from the film roll R to the film transport mechanism 6 by the film feeding mechanism 5 is cut by the cutting blade 69a of the cutter mechanism 69 to form one rectangular film F, The two feeder units 61 and 62 are carried to above the lifter mechanism 30. Then, above the lifter mechanism 30, the periphery of the film F is strongly held by the operation of each clamp.

Then, the lifter mechanism 30 pushes up the product G and the tray T with respect to the film F which is strongly held around the periphery, especially on both sides. Then, the film F, which is strongly held around, extends so as to cover the upper portions of the product G and the tray T.

In this state, when the rear folding plate 78 and the left and right folding plates 76 and 77 horizontally move to the lower side of the tray T, the clamps other than the clamps on the front side release the holding of the film F at an appropriate timing. , The three sides of the film F are folded under the tray T. Then, 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 to the discharge table 83 side as the tray T moves. It will be folded under the T. The clamp on the front side releases the holding of 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 (on the discharge table 83), the entire product G and the tray T are covered with the film F. The completed packaging is covered.

Furthermore, when a process including label sticking is selected, the label printer 10 prints the price and weight of the product calculated based on the measured value on the label, and the label is issued by the label issuing machine 11. Is affixed to the packaged product G and tray T.

<Details of Operation During Heat Sealing> As described above, the film F folded under the tray T is heat sealed while the discharge pusher 79a pushes the tray T toward the discharge table 83. The operation at the time of heat sealing will be described in more detail.

The tray T passes over the heating roller 112 of the heating mechanism 82 while the tray T is being 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 is passing over the heating roller 112, the controller 9 issues a command to the servo motor 101 to drive the servo motor 101 with a predetermined output for a predetermined time period. As a result, the product G in the tray T is pressed downward,
The film F that is indirectly folded under the tray T is strongly sandwiched between the heating roller 112 and the tray T, and the film F is strongly pressed by the heating roller 112.

Further, the heating roller 112 of the heating mechanism 82
Is controlled by the control unit 9 so as to reach the set temperature in the table in the proper temperature data file 96b shown in FIG. The control unit 9 discriminates the type of the film F currently in use from the manually input information, the external input information, or the information obtained from the sensor, etc., and heats it according to the type of the film F using the table shown in FIG. Determine the temperature of the roller 112. Then, the control unit 9 controls the heating roller 11
Specifically, the heater 113 in the heating roller 112 is controlled so that 2 becomes the determined set temperature. This eliminates the need for the operator to manually adjust the temperature of the heating roller 112 as in the conventional case, which causes a malfunction due to manual adjustment, that is, it takes a lot of time to determine the temperature or an appropriate temperature is not determined. Is eliminated.

[Second Embodiment] <Outline of Apparatus> FIG. 7 shows a packaging apparatus according to an embodiment of the present invention. The packaging device 201 shown here covers the upper opening of a tray T containing fresh foods such as meat and fish and processed foods such as side dishes with a film Fm, and a flange located around the opening of the tray T and the film Fm. It is a so-called top-seal type packaging device that heat-seals and seals.

<Device Configuration> This packaging device 201 mainly includes a frame 201a, a holding member 202 for holding the tray T, four heating rollers 203 located above the holding member 202, and a holding member 202. Heating roller 20
Film supply mechanism 2 for supplying film Fm between
05 and a lift mechanism 206 for moving the holding member 202 up and down.
And a roller moving mechanism 207 for mainly moving the heating roller 203 up and down, a roller turning mechanism 208 for turning the heating roller 203, and a control unit (not shown) for controlling each mechanism.

The holding member 202 holds and holds the tray T on its upper surface, and is lifted and lowered by the lift mechanism 206. Tray T for this holding member 202
The operation of placing the tray may be performed manually by the operator, or may be automatically transferred from a separately prepared transporting device for the tray T.

The heating roller 203 is a cylindrical member, and is a roller supporting portion 27 of a roller moving mechanism 207 described later.
It is rotatably supported by 1. On the surface of the heating roller 203, a layer softer 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 made of an elastic material such as resin or synthetic rubber. Four of these heating rollers 203 are provided radially with respect to a rotary shaft 281 of a roller turning mechanism 208, which will be described later, and are inclined with respect to the upper surface of the tray T which is parallel to the horizontal plane when viewed from the side. It is supported by the roller support portion 271.

A heater (not shown) for heating the heating roller 203 is arranged inside the heating roller 203. Based on the data table shown in FIG. 6 stored in the storage unit (not shown), the control unit adjusts the type of the film Fm so that the heating roller 203 has an appropriate temperature set for each type of film. To control the heater.

The film supply mechanism 205 is a mechanism for feeding an amount of film Fm suitable for the size of the tray T between the holding member 202 and the heating roller 203 in the lowered state. The film supply mechanism 205 includes a setting unit 251 for setting the film Fm, a conveying unit that conveys the film Fm and can sandwich the film Fm, and the remaining film F that is partially extracted by the packaging of the tray T.
and a winding unit 253 for winding m.
The setting unit 251, the transport unit, and the winding unit 253 are
Each is supported by the frame 201a. The transport unit includes transport rollers 252a and 252b arranged so as to sandwich a space between the holding member 202 and the heating roller 203.
And pressing rollers 252c and 252d that are pressed against these
And two belts B1 that are respectively wound around both ends of the transport rollers 252a and 252b, and two belts B2 that are respectively wound around both ends of the pressing rollers 252c and 252d. ing. In the film supply mechanism 205, the film Fm set in the setting unit 251 is stretched over the conveying rollers 252a and 252b, and the belt B1 and the pressing rollers 252c and 252c are arranged.
It is conveyed by the two belts B2 that are wound around 52d and is connected to the winding section 253. Conveyor roller 252
The a and 252b and the winding portion 253 are operated by a driving means such as a motor (not shown).

A belt B1 for conveying the film Fm
Has a grip property with respect to the film Fm,
The structure is such that the film Fm can be held between the belt B2 and the pressing rollers 252c and 252d.

The lift mechanism 206 is a mechanism for pushing up the tray T with respect to the film Fm, and includes the drive motor 261 and the fixing portion 2 fixed to the frame 201a.
62, and a moving part 2 that moves up and down with respect to the fixed part 262.
And 63. On the upper surface of the moving unit 263,
The holding member 202 is fixed. That is, the holding member 20
The tray T placed on the tray 2 moves up and down as the moving unit 263 moves.

The roller moving mechanism 207 includes the heating roller 20.
3 is a mechanism for changing the height position of the heating roller 203, and as shown in FIG.
1, a link mechanism 272, a pressing plate 273, a lever mechanism 274 that applies a force to the pressing plate 273 from above, and a motor 275 that operates the lever mechanism 274. The roller support portion 271 pivotally supports the heating roller 203 so that the heating roller 203 is in the inclined state shown in FIG. 1 in a side view. One end of the link mechanism 272 supports the roller support portion 271 by a pin, and the other end is pushed down by the pressing plate 273. When the pressing plate 273 no longer applies a force to the link mechanism 272, the roller support portion 27
1 and the heating roller 203 by their own weight, the link mechanism 2
The other end of 72 is lowered. The pressing plate 273 is a disk-shaped 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.

The roller revolving mechanism 208 includes the heating roller 20.
3 and a roller support portion 271 and a link mechanism 272 that support the same 3 are rotated by a predetermined angle at the time of seal packaging, and include a rotating shaft 281 and a motor 282 that rotates the rotating shaft 281. The rotary shaft 281 is
A base member 279 whose lower end supports the link mechanism 272.
Is fixed to the motor 282 by an unillustrated timing belt and pulley. When the motor 282 rotates the rotary shaft 281 by a predetermined angle under the control of the control unit, each heating roller 203 rotates about the rotary shaft 281 by a predetermined angle.

<Operation Control of Apparatus> As shown in FIG. 7, when the tray T is placed on the holding member 202, first, the control unit feeds the film Fm from the film supply mechanism 205, and the film Fm is moved above the tray T by the belt. It is held by B1 and belt B2.

The control unit is the moving unit 263 of the lift mechanism 206.
Is raised, the tray T pushes up the film Fm and stops. At this time, by pushing up the tray T,
Tension is applied to the film Fm.

Next, the control section controls the motor 275 to release the downward urging of the lever mechanism 274 with respect to the pressing plate 273 and open the link mechanism 272. Then, the heating roller 203 moves until it contacts the tray T by its own weight. Since the heating rollers 203 are independent of each other, the heating rollers 203 contact the tray T with substantially the same pressure.

The control unit controls the motor 275 to bring the heating roller 203 into contact with the tray T, and at the same time, the motor 2
82 is controlled to rotate the rotary shaft 281 by a predetermined angle. Since the predetermined angle is set to 90 ° because four heating rollers 203 are provided at equal intervals in the rotation direction, it is possible to seal the entire circumference of the tray T with one of the heating rollers 203. , Here, the angle is set to 100 ° with some allowance. When the heating roller 203 starts rotating in association with the rotation shaft 281, the heating roller 203 moves so as to trace the circumference of the tray T, and heat-seals the tray T and the film Fm to seal them.
At this time, the heating roller 203 moves while rolling on the flange. Further, at this time, heat and force are concentrated 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 at the edge portion of the tray T.
Is melted and separated.

When the sealing of the film Fm to the tray T by the heating roller 203 is completed, the heating roller 203 is lifted and the tray T is lowered by the lift mechanism 206, and then the seal-wrapped tray T is taken out from the holding member 202. Move on to the next cycle. When moving to the next cycle, the film Fm that is partially melted by the seal packaging of the tray T and pulled out is wound up by driving the winding unit 253. The width of the film Fm is set to be wider than the width of the tray T, the continuity of the film Fm is not interrupted by the seal packaging of the tray T, and the problem that the winding unit 253 cannot take up the film occurs. do not do.

<Characteristics of the apparatus> In the packaging apparatus 201, the controller controls the heater for heating the heating roller 203 based on the data shown in FIG. The temperature is controlled according to the type of the film Fm so as to reach the temperature. That is, the control unit determines the type of the film Fm currently in use based on the manually input information, the external input information, or the information obtained from the sensor or the like, and uses the table shown in FIG.
The temperature of the heating roller 203 is determined according to the type of. This allows the operator to operate the heating roller 203 as in the past.
Since it is not necessary to manually adjust the temperature of No. 1, it is possible to solve the problem caused by the manual adjustment, that is, it takes a lot of time to determine the temperature and the appropriate temperature is not determined.

[0070]

According to the present invention, the temperature of the heat supply member is automatically determined on the basis of the temperature data set for each type of film in the storage unit. Eliminates the need to manually adjust the temperature of the heat supply member, and solves the problem caused by the manual adjustment, that is, it takes a lot of time to determine the temperature and the appropriate temperature is not determined. That is, in the packaging device according to the present invention, the heat supply member is set to an appropriate temperature in the packaging device even when it is operated by an unskilled operator.

[Brief description of 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 device.

3 is a schematic view taken along the line III-III in FIG.

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 heating roller proper temperature data for each film type.

FIG. 7 is a schematic view of a packaging device according to a second embodiment.

[Explanation of symbols]

1 packaging equipment 9 control unit 96 memory 96a film data 96b Heating roller for each film type 112 Heating roller (heat supply member) 201 packaging equipment 203 heating roller (heat supply member) F, Fm film

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E051 AA08 AB06 BA12 CA03 CA08                       CB05 DA10 EA05 EB03 EB08                       EB10 FB02 FC02 HA08 HC03                       HE01 JA02 KA03 KA10 KB04                       LA04 LA10 LB05

Claims (2)

[Claims] 1. A packaging device for pushing up an article to be packaged from below under tensioned film and folding the peripheral edge of the film below the article to be heat-sealed. A heat supply member that applies heat to the film folded to the side, a storage unit that stores appropriate temperature data of the heat supply member that is set for each type of the film, and the temperature in the storage unit. And a control unit that determines the temperature of the heat supply member based on the data. 2. A packaging device for a tray having an open upper portion, wherein the opening is covered with a film in a state where the article to be packaged is accommodated in the tray, and the film is heat-sealed around the opening of the tray. A heat supply member that applies heat to a contact portion between the opening peripheral portion of the tray and the film, and a storage unit that stores appropriate temperature data of the heat supply member set for each type of the film. And a control unit that determines the temperature of the heat supply member based on the temperature data stored in the storage unit.