JP3474501B2 - Packaging equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to the packaging apparatus for performing packaging by a film, to a packaging apparatus for performing packaging, especially keeping the film stretched state.

[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. Meanwhile, the film is conveyed to the packaging station and is packaged at the packaging station. In the packaging station, the article to be packaged stored in the tray is pushed up against the conveyed film, and the peripheral edge of the film is folded into the bottom surface side of the tray while the article to be packaged is brought into close contact with the film. As a result, the article to be packaged and the tray are wrapped in the stretch film, and then the film on the bottom surface of the tray is heat-sealed to complete the packaging.

Such a stretch wrapping device is disclosed in Japanese Patent Application Laid-Open No. 9-169307. The packaging device disclosed here is invented by the applicant of the present application, and is a device that can quickly perform weighing and packaging. In the packaging apparatus disclosed in the above publication, the film roll 3a is provided on the roll bar 13 of the roll support mechanism 4.
, And the film 3 pulled out from here is fed through the carry-in mechanism 42 to a pair of feeders (conveyor units 18, 1).
9). Then, the film roll 3a is initially set to guide the film 3 to the pair of feeders, or the film 3 is replaced when the film roll 3a is replaced.
As for the method of guiding the sheet to the pair of feeders, as described in the above publication, a method having the following procedure is adopted.

First, the operator presses the emergency stop switch to stop the operation of the packaging device, and the film roller 3
Set a on the roll support mechanism 4. Next, as indicated by a chain line in FIG. 3 of the above publication, the carry-in mechanism 42 is rotated upward. Then, the front end portion of the film 3 fed from the film roller 3a is spread and placed on the conveyor belts of the pair of feeders, the carrying-in mechanism 42 is returned to the original position, and the carrying-in belt 41 lifts the film 3 from above. Hold down. Thereafter, when the emergency stop switch is released and the manual film feed button is pressed, the film 3 is fed toward the packaging station by the pair of feeders.

The initial setting method of such a film is as follows.
The same applies to other stretch wrapping machines, and the present situation is that the operator manually spreads the tip of the film pulled out from the film roll and sets it in the machine.

[0006]

The conventional packaging apparatus adopts the above-described initial film setting method, but it cannot be denied that setting the film is troublesome for the operator. This is because it is necessary to pull out the leading edge of the film from the film roll, and then set the film in the unfolded state on the transport mechanism (feeder). Stretch films are often thin and wrinkle-prone, and setting the film in the transport mechanism while maintaining the spread state is a troublesome task for the operator who initially sets the film.

Further, in the case of adopting the structure of the packaging device described in the above-mentioned publication, since the film roll is arranged on the side surface, the operator turns around the packaging device to perform the work when setting the film. There is a need.
However, a sufficient space is not always secured on the side of the packaging device, and when the space is insufficient, the work of setting the film becomes more difficult.

[0008] An object of the present invention is to provide a packaging device which can save the operator's trouble of expanding the leading end of the film when setting the film.

[0009]

SUMMARY OF THE INVENTION The packaging apparatus according to claim 1 <br/> is a packaging apparatus having a mechanism for pressing the material to be packaged to the tensed holding film, and the roll holder, first feeder A second feeder, a feeder moving tool, and a controller. The roll holder rotatably holds the film roll. The first feeder holds the first portion in the film width direction of the film drawn from the film roll held by the roll holder, and feeds the film in the film longitudinal direction. The second feeder holds the second portion in the film width direction of the film drawn from the film roll held by the roll holder, and feeds the film in the film longitudinal direction. The film width direction second part of the film is a part whose position in the film width direction is different from the film width direction first part of the film. The feeder moving tool changes the relative distance in the film width direction between the first and second feeders. Therefore, the film width direction first portion of the film held by the first feeder and the film width direction second portion of the film held by the second feeder do not always have the same position in the film width direction. The control unit performs film initial setting control. In the film initial setting control of this control unit, the first and second feeders feed the film in the film longitudinal direction while increasing the relative distance between the first and second feeders in the film width direction by the feeder moving tool.

In the packaging apparatus according to the first aspect, in the film initial setting control, the first film width direction first film is controlled.
The first and second feeders holding the portion and the second portion in the film width direction expand the relative distance along the film width direction while feeding the film in the longitudinal direction. Therefore, during the initial setting control of the film, the first and second films are set.
At least one of the feeders will gradually move to hold the outside of the film. In this way, the position of the film held by the feeder gradually shifts to the outside while the film is being fed, so even if the film is initially set in the first and second feeders without being unrolled, the film initial setting During the control, the films held by the first and second feeders gradually spread out. Then, when the relative distance between the first and second feeders becomes approximately the width of the film, both sides of the film are expanded and are held by the first and second feeders.

As described above, in the packaging apparatus of the present invention , since the film initial setting control as described above is performed, it is not necessary to set the film drawn from the film roll in the first and second feeders in a state where the leading end of the film is spread. In other words, even when the film is set on the first and second feeders in a state where the leading edge of the film is wrinkled, the film is automatically spread by the control of the first and second feeders and the feeder moving tool. Become. For this reason, it is possible to save the operator's trouble of expanding the leading end of the film when setting the film.

A wrapping apparatus according to a second aspect is the wrapping apparatus according to the first aspect, wherein at least a second feeder of the first and second feeders is a film in a longitudinal direction of the film during a film initial setting control. The second portion in the film width direction to be held shifts outward in the film width direction in accordance with the feeding. The packaging device according to claim 3 is the same as that of claim 2.
In the packaging apparatus described in (1), at least the second feeder of the first and second feeders has two transport belts that sandwich the film, and a belt drive tool that drives these transport belts.

Here, the second feeder sandwiches the film 2
Since it has two conveyor belts, when the second feeder shifts to the outer side in the film width direction, the film sandwiched by the conveyor belts gradually shifts diagonally rearward at the portion gripped by the second feeder. Finally, the both sides are finally moved to a state where they are held by the first and second feeders. Packaging device according to claim 4 is the packaging apparatus according to any one of claims 1 to 3, further comprising a film hooking plate, and a hanging plate moving device. The film hanging plate is provided between the roll holder and the first and second feeders, and is capable of hanging the leading end of the film drawn from the film roll held by the roll holder. The hanging device driving device is a driving device for moving the film hanging plate. Then, during the film initial setting control, the control unit operates the hanging plate moving tool to move at least the leading end of the film hung on the film hanging tool at least the first feeder before feeding the film by the first and second feeders. Moves it to a position where it can be held, and at least the first feeder holds the leading edge of the film.

In this case, the operator does not manually set the leading edge of the film pulled out from the film roll on the first and second feeders, but the film hanging plate and the hanging plate moving device for driving the film automatically move the first film to the first position. And the second
It can be set in the feeder. That is, when the operator hangs the film whose leading end is not spread on the film hanging plate, the hanging plate moving tool moves the film hanging plate to the first and second feeders (or the first feeder), and the first and second feeders. Feeder (or first feeder)
Hold the leading edge of the film. After that, the first and second
When the film is fed while the feeder is expanding, the film is held in the expanded state by the first and second feeders. When the first feeder only holds the leading edge of the film and starts feeding the film, the second feeder gradually holds the film as the film is fed, and the subsequent movement of the first and second feeders causes The films sent will be gradually expanded.

Therefore, in the packaging apparatus of the present invention , the operator only has to hang the film on the film hanging plate without spreading the leading edge of the film, which facilitates the work of the operator who initially sets the film in the packaging apparatus.
The packaging device is easy to use. Packaging apparatus according to claim 5
The table is a packaging device having a mechanism for pressing an object to be packaged against a film held in tension, and includes a roll holder, a film hook, a feeder, an initial setting member, and a driving tool. The roll holder rotatably holds the film roll. The film hanging tool is provided in the vicinity of the roll holder, and is capable of hanging the leading end of the film pulled out from the film roll held by the roll holder. The feeder holds both sides of the film and feeds the film in the longitudinal direction of the film. The initial setting member is provided between the roll holder and the film hook. This initial setting member can hold a portion near the film roll of the film which is pulled out from the film roll held by the roll holder and whose tip is hooked on the film hook. The driving tool moves the initial setting member.

Here, it is possible to hold the film pulled out from the film roll and hung on the film hanging device by the initial setting member and bring it to the feeder by the driving device. Since the initial setting member is provided between the roll holder and the film hanging device, the initial setting member holds the portion of the film pulled out from the film roll, which is very close to the film roll and which spreads over the width of the film. can do.

As described above, in the packaging apparatus according to the present invention , the initial setting member can hold the portion of the film pulled out from the film roll, which is very close to the film roll, and bring it to the feeder. Even when the film drawn by is hung on the film hanging tool without being spread, the spread part of the film can be held by the feeder. For this reason, it is possible to save the operator's trouble of expanding the leading end of the film when setting the film.

The packaging apparatus according to claim 6 is the packaging apparatus according to claim 5, the initial setting member has more film width of the length. Here, since the length of the initial setting member is longer than the film width, the initial setting member is
The film can be held more reliably. Claim 7
Packaging device according to is a packaging device according to claim 5 or 6, initial setting member has an adhesive or adhesion to the film abutting portion.

Here, since the initial setting member has adhesiveness or adhesiveness, it is not necessary to provide a member for sandwiching the film, the structure is simple and the space can be saved. become. Packaging device according to claim 8 is the packaging apparatus according to any one of claims 5 to 7, the driving tool, by moving the initial set member, an initial setting member was pulled out from the film roll film The film held by the initial setting member is moved to a position where the feeder can hold it.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] FIG. 1 shows a film lateral feed type packaging apparatus according to an embodiment of the present invention.
This packaging device 1 is a device for performing film packaging by pushing up a product such as a fresh food product placed on a tray against a stretched film F held in tension and folding the peripheral portion of the film F to the bottom side of the tray. . In addition to the film packaging function, the packaging 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 and loading 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, and a sealing mechanism 8. The weighing-in mechanism 2 includes a main body 1a.
It is provided in the center of the front of the. Packaging station 3
Is a space formed in the main body 1a. The roll support mechanisms 4 are arranged on both sides of the main body 1a and hold the film rolls R, respectively. 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 wraps an article to be wrapped with the film F conveyed to the wrapping station 3. The sealing mechanism 8 heat seals the film F folded by the folding mechanism 7 on the bottom side of the package.

A display panel 9 is provided on the upper portion of the main body 1a.
A control device (control unit) 9 including a and an operation key 9b is arranged. The control device 9 includes the above-mentioned mechanisms 2,
While controlling the operations of 5, 6, 7, and 8, the price of the product G is calculated based on the signal indicating the weight of the product G measured by the weighing-in / carrying-out mechanism 2, and the weight and the price of the product G are calculated. It controls the operation of the label printer 10 and the label issuing machine 11 that print on a label.

The film roll R used in the packaging device 1 is formed by multiplely winding a stretch film F having a predetermined width dimension. <Weighing-in / carrying-in mechanism> The weighing-in / carrying-in mechanism 2 has a weighing machine for weighing the weight of the product G such as food stored in the tray T, and a plurality of carrying-in belts stretched between a pair of rollers.
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 protrusion of the carry-in belt, and the lifter mechanism 3 of the packaging station 3 (inside the apparatus) is pushed.
0 (described later) is sent to the support member 33 (see FIGS. 15 and 16).

<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.
The lifter mechanism 30 pushes up the tray T and the commodity G (see FIG. 17). Then, the folding mechanism 7 folds the peripheral portion of the film F to the bottom surface side of the tray T in the 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 right and left, and the left and right folding plates 76, 77 and the rear folding plate 78, which will be described later, are provided in the tray T.
It is supposed to tip over temporarily when entering the lower part of the. <Roll Support Mechanism> Roll support mechanisms (roll holders) 4 that support the film roll R are provided substantially symmetrically on both sides of the main body 1a (see FIGS. 2 and 4). The roll support mechanism 4 is mainly composed of a roll bar 4a.

The roll bar 4a is a film roll R.
The film roll R can be held by a holder or the like. The roll bar 4a is rotatably supported by the main body 1a, and a belt 4c is hung on a pulley 4b fixed to one end of the roll bar 4a (see FIG. 2). The belt 4c is driven according to the rotation of the film roll driving motor 4d. Further, a film brake 4e is provided between the belt 4c and the film roll drive motor 4d, so that the feeding of the film F from the film roll R can be stopped.

<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, 62 of the film transport mechanism 6 described later. As shown in FIG. 2, the film feeding mechanism 5 mainly moves a feeding roller 51, a feeding motor 52 for rotating the feeding roller 51, a film insertion plate unit (hanging plate) 53, and a film insertion plate unit 53 up and down. And a film insertion plate drive motor (hanging plate drive tool) 54.

The feeding roller 51 is the roll supporting mechanism 4
A roller disposed obliquely above the film roll R held on the outside of the film roll R and extending along the longitudinal direction of the film roll R longer than the film roll R (FIGS. 2 and 5). reference). 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 plates, and is arranged above the film roll R supported by the roll support mechanism 4, as shown in FIGS. 2 and 5. The film insertion plate unit 53 also extends longer than the film roll R along the longitudinal direction of the film roll R. This will be described in detail with reference to FIGS. 6 and 7. The film insertion plate unit 53 includes two plates 57 and 58 each having one end connected by a hinge (not shown) and a plurality of one-way plates supported by the plate 57. It is composed of a roller 59.

As shown in FIG. 6, notches 53a to 53g are formed in the upper portions of the two plates 57 and 58. The distance between the notch 53a and the notches 53c to 53g is a distance corresponding to five types of films F having different film widths. For example, the distance between the outside of the cutout 53a and the outside of the cutout 53g is substantially equal to the film width of the film F having the largest film width. Also, the plate 58
Rotates about a hinge portion (not shown) with respect to the plate 57, and the plate 58 can be opened and closed as shown in FIG. 4 (the state shown by the dotted line in FIG. 4 is the plate 58. Represents the open state).

A plurality of one-way rollers 59 are provided along the longitudinal direction of the plate 57 (the film width direction), and hold the film F so that the film F sandwiched by the plates 57 and 58 does not fall downward. Fulfill. Since the film insertion plate unit 53 moves up and down, the one-way roller 59 has a resin main body plated with metal such as nickel in order to reduce inertia. Since the surface of the one-way roller 59 is projected to the plate 58 side more than the surface of the plate 57 (see FIG. 7), the film F sandwiched between the plates 57 and 58 always contacts the one-way roller 59. .

Due to the presence of such one-way roller 59, when the plate 58 is closed and the film F is sandwiched by the plates 57, 58, the film F does not fall out of the film insertion plate unit 53. That is, the film F is moved above the plates 57 and 58 by the cutter mechanism 69 described later.
Even when the film is cut, the film F is held by the one-way roller 59 and does not slide downward.

The film insertion plate drive motor 54 is provided for moving the film insertion plate unit 53 up and down, and vertically moves the film insertion plate unit 53 via a link mechanism. Specifically, it serves to switch the height position of the film insertion plate unit 53 between the position shown by the solid line and the position shown by the dotted line in FIG.

<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 and the first feeder moving unit (feeder driving tool) 6
3 and a second feeder moving unit (feeder driving tool) 6
4 and a feeder drive unit (belt drive tool) 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 arranged on the other side when viewed from the front (see FIGS. 4 and 12). These first and second feeder units 6
1, 62 sandwich the both side portions (front side and the other side portion) of the laterally fed film F with a belt, and convey the film F by the operation of the feeder drive unit 65.

The first feeder unit 61 is actuated by the first feeder moving unit 63 and the second feeder unit 62 is actuated by the second feeder moving unit 64, respectively, in the film width direction (FIGS. 3, 4, 12). It is configured to move in the left-right direction). 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.

As shown in FIG. 8, each feeder moving unit 63, 64 has a drive motor 63a, 64a and belts 63b, 64b which move in both film width directions by the operation of the drive motor 63a, 64a. There is. Then, each feeder unit 61, 62 is connected to each belt 63b,
64b (see FIG. 8), the drive motor 63
The feeder units 61 and 62 can individually move in the film width direction by the operation of a and 64a.

(Details of Feeder Unit) Next, the structure of the first and second feeder units 61 (62) will be described in detail. Since both feeder units 61 and 62 have substantially the same configuration, the first feeder unit 61 will be described below as an example. 9 to 11 show detailed views of the first feeder unit 61. These drawings include clamps 25 to 29, which are not shown in FIGS. 1 to 8. In addition, a top view of the first and second feeder units 61 and 62 including the clamps 25 to 29 is shown in FIG.
FIG. 13 shows the arrangement of the clamps 25 to 29 extracted from FIG.

As shown in these figures, the first feeder unit 61 includes a frame 21, a lower belt 22, an upper belt 23, an introducing belt 24, and main clamps 25 to 25.
27 and auxiliary clamps 28 and 29. (Frame) The frame 21 supports the pulleys supporting the belts 22 to 24 and the clamps 25 to 29, and constitutes the skeleton of the first feeder unit 61. In addition, the frame 21 is provided between the upper belt and the lower belt of the lower belt 22 so that the belts 22 and 23 are almost the same.
It has a strip plate 21a having the same width as. This strip 2
1a plays a role of sandwiching the belts 22 and 23 and the film F with main clamps 25 to 27 described later.

(Belt) The lower belt 22 comes into contact with the film F from below and is wound around six pulleys as shown in FIG. One of these pulleys is connected to the drive motor of the feeder drive unit 65 via a plurality of belts, as shown in FIG. When the drive motor of the feeder drive unit 65 operates, the lower belt 22 of both feeder units 61 and 62 moves in synchronization.

The upper belt 23 rides on the lower belt 22 and follows the movement of the lower belt 22. The upper belt 23 is stretched around four pulleys. The introduction belts 24 are arranged outside both ends in the longitudinal direction of the lower belt 22, and are in contact with the vertically extending portions of the lower belt 22. Further, the introduction belt 24 can be switched between the state shown by the solid line in FIG. 9 and the state shown by the one-dot chain line by a driving tool (not shown). In the state shown by the one-dot chain line in FIG. 9, the lower belt 22 and the introduction belt 24
There is a gap between the film F and the film F held by the film insertion plate unit 53 of the film feeding mechanism 5 and can be inserted into this gap. That is, the introduction belt 24 plays a role of sandwiching the film F fed from below by the film feeding mechanism 5 with the lower belt 22 and guiding it between the lower belt 22 and the upper belt 23.

The film F held by the film insertion plate unit 53 is attached to the lower belt 22 and the introduction belt 24.
When entering the gap between the two belts 22,2
Considering that the film F is sandwiched by 4, the positions of the notches 53a to 53g of the film insertion plate unit 53 in the film width direction and the positions of the belts 22 and 24 in the film width direction are aligned, Feeder unit 6
The positions of the film width direction 1, 62 are set (see FIG. 6).
reference).

(Main clamp) Main clamp 25-
The belt 27 is disposed between the upper belt and the lower belt of the upper belt 23, and the two belts 22 and 23 are two-dimensionally arranged in plan view.
It is located in a position that overlaps with. These clamps 25
27 are operated by solenoids (electromagnetic actuators fixed to the outer surface of the frame 21) not shown. The clamps 25 to 27 are normally both belts 22 and 23.
However, when the solenoid is turned on, the solenoid is pushed down, and a downward force is applied to the lower belt of the upper belt 23 and the upper belt of the lower belt 22 so that they are between the strip plate 21a. Hold tightly with. Therefore, when the film F is between the lower belt 22 and the upper belt 23, if the solenoid is turned on, the film F will move to both belts 2.
When the solenoid is turned off, the film F is released from the holding state.

(Auxiliary Clamp) Auxiliary Clamps 28 and 29
Are the main clamps 25 that are aligned in a plane.
It is arranged at a position away from ~ 27. In particular,
As shown in FIG. 13, the main clamps 25 to 27 are arranged so as to overlap the belts 22 and 23.
While holding the film F firmly by holding the film F together, the auxiliary clamps 28 and 29 are arranged at positions displaced inward from the belts 22 and 23 and hold the film F by directly holding the film F. There is. Since the auxiliary clamps 28 and 29 have the same configuration, the auxiliary clamp 28 will be described below as an example.

As shown in FIGS. 9 to 11, the auxiliary clamp 28 mainly has a fixed contact portion 28a located above the film F and a moving contact portion 28b located below the film F. It consists of and. When the moving contact portion 28b moves upward, the film F is strongly sandwiched between the fixed contact portion 28a and the moving contact portion 28b, and the film F is clamped.

The fixed contact portion 28a is a plate member that extends long in the film transport direction (horizontal direction in FIG. 10, vertical direction in FIG. 13), and the corners of the lower surface are rounded to protect the film F. The fixed contact portion 28a is fixed to the frame 21 via an L-shaped fixture 28d (see FIG. 11). The moving contact portion 28b is moved up and down by the solenoid 28c and extends in the film transport direction. However, the moving contact portion 28b has a shorter length in the film transport direction than the fixed contact portion 28a. Solenoid 2 for moving the moving contact portion 28b up and down
8c is fixed to the frame 21 via a fixture 28e (see FIG. 11).

<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.

The cutter mechanism 69 has two sets, one for feeding the film F from the film roll R on the front right side and one for feeding the film F from the film roll R on the left front side. Have been deployed (see Figure 2). <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.

The left and right folding plates 76 and 77 are formed of the film F.
Both ends in the film transport direction are folded to the bottom side of the tray T, and can be horizontally moved by a motor and timing belt (not shown). The rear folding plate 78 has a tray T on the side of the film F on the second feeder unit 62 side.
It is folded on the bottom side of the, and can be moved horizontally by a motor and timing belt (not shown).

The front folding bar 79 folds the side portion of the film F on the side of the first feeder unit to the bottom side of the tray T when the tray T is discharged by the discharge pusher 79a which pushes the tray T toward the sealing mechanism 8 side. Are arranged as follows. <Seal Mechanism, Label Printer, Label Issuing Machine> The seal mechanism 8 plays a role of heating and sealing the bottom surface of the tray T pushed out by the discharge pusher 79a, and the front side portion also serves as a discharge stand. . Then, the label-printing machine 11 attaches the label printed by the label printer 10 to the packed product discharged here.

<Control Device> The control device 9 arranged on the upper portion of the main body 1a is configured as shown in FIG. 14, and each of the mechanisms 2, 5, 6, 30, 7, 7, 8, 10, 11 is arranged. Control movements. Then, the operation by the operator is the operation key 9
b, other switches and dials 16, 17, 18, 1
Also accepted by 9,50.

<Outline of operation of packaging device> Next, the operation of the packaging device 1 having the above-mentioned 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 pushes the tray T on which the product G is placed onto the support member 33 of the lifter mechanism 30 (see FIG. 16).

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 cutter mechanism 69 to form one rectangular film F in the lifter mechanism 30. It is carried to the upper side by both feeder units 61 and 62. Then, above the lifter mechanism 30, the clamps 25 to 29 are actuated to strongly hold the periphery of the film F.

Then, the lifter mechanism 30 pushes up the product G and the tray T with respect to the film F whose periphery, particularly both sides, is strongly held (see FIG. 17). 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 bottom side of the tray T, the clamps 25 to 29 other than the clamps on the front side (left side in FIG. 18) at the proper timing are film F. Is released and the three sides of the film F are folded under the tray T. When the discharge pusher 79a pushes the tray T toward the sealing mechanism 8 side, one side of the front side film F that has not been folded hits the front folding bar 79, and the sealing mechanism 8
As the tray T moves to the side, it is folded under the tray T. The clamp on the front side releases the holding of the film F at this time. Further, during this movement, the film F folded under the tray T is heat-sealed, and when the film F is discharged to the position shown in FIG. Becomes

Further, 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. <Film Initial Setting Operation of Packaging Machine> Next, a film initial setting method performed when the packaging machine 1 is first used or when the film F wound on the film roll R is used up will be described.

(First Step) When the film initial setting operation is performed by replacing the film roll R or newly setting the film roll R to make the packaging apparatus 1 in a usable state, the operator first pushes the emergency stop switch 19.
Then, the supply of electric power to the drive portion of each mechanism is cut off, and malfunction of the drive portion during work is prevented.

Then, the operator operates the film exchange door 1b and the side cover 1c (see FIG.
Open). By opening the side cover 1c, the film roll R can be inserted into the roll bar 4a from the front side.
Insert the film roll R into a and fix it with a holder or the like.

(Second Step) Next, the operator opens the plate 58 of the film insertion plate unit 53 (FIG. 4).
(See the state of the plate 58 indicated by the dotted line in FIG. Then, since the plates 57 and 58 are separated from each other on the front side as shown in FIG. 19, the operator pulls out the front end of the film F from the film roll R, and the front end of the film F as shown in FIG. The plate 58 from the inside to the outside.

At this time, the hooking operation of the film tip on the plate 58 does not require the film tip to be spread and hung.
As shown in FIG. 6, the front notch 53a and the notch 53b
If the film F is hung on and, the film F may not be hung on the notches 53c to 53g on the other side. Further, as shown in FIG. 6, both notches 53a, 5a
Although it is desirable that the film F be hooked on the 3b, as shown in FIG. 30, the film F does not necessarily need to be hooked on the notch 53b as long as the film F is hooked on the notch 53a.

Therefore, it is not necessary for the operator to work around the side of the packaging device 1, and reach for the operator from the front side to cut out only the front side portion of the film front end.
It is possible to hang on 3a, 53b. Then, the operator hangs the film F on the plate 58 and then closes the plate 58 (see FIG. 20).

(Third Step) Next, the operator releases the emergency stop switch 19 and presses the film initial set switch 50 (see FIG. 14). Although not shown in FIG. 5, the film initial set switch 50 is a switch visible on the front side of the side portion of the packaging device 1 when the film exchange door 1b is opened.

When the switch 50 is pressed, the control device 9 causes the film feeding mechanism 5 and the film transport mechanism 6 to operate.
To perform a series of film initial set controls. First, the control device 9 moves the film transport mechanism 6 to
The belts 22, 23, 24 of the feeder unit 61 are located at the positions of the notches 53a in the film width direction, and the belts 22, 23, 24 of the second feeder unit 62 are located at the positions of the notches 53b in the film width direction. For example, in FIG.
If the first feeder unit 61 is in the position of the cutout 53a and the second feeder unit 62 is in the position of the cutout 53g as shown in (a), then the second feeder unit 62 is in the position as shown in FIG. 21 (b). 62 approaches the front side and stops at the position of the notch 53b. As a result, the first and second
The feeder units 61 and 62 can receive the film F when the film F hanging on both the notches 53a and 53b of the film insertion plate unit 53 has risen.

(Fourth Step) Next, as shown in FIG. 22, the control device 9 changes the posture of the introducing belt 24 so that a gap is opened between the lower belt 22 and the introducing belt 24, and the gap is formed. The film insertion plate unit 53 is lifted so that the film F held in is inserted. At this time, the feeding roller 51 is also rotated.

Then, the posture of the introducing belt 24 is returned to its original position, and the film F in the notches 53a and 53b is
The first and second feeder units 61, 62 are clamped by the lower belt 22 and the introduction belt 24, respectively. When the film F is hooked only on the notch 53a of the film insertion plate unit 53 as shown in FIG. 30, only the first feeder unit 61 holds the film F.

(Fifth Step) When the film F is sandwiched between the first and second feeder units 61 and 62, the control device 9 operates the feeder driving unit 65 to start feeding the film F, and at the same time, the film insertion plate. The unit 53 is lowered. The state at this time is shown in FIG. The front end of the film F is attached to each feeder unit 61, 62.
Between the lower belt 22 and the introduction belt 24, the lower belt 22
Then, the film F is transferred between the upper belt 23 and the upper belt 23, and continues from the film insertion plate unit 53 to the film roll R. The film insertion plate unit 53
Since the one-way roller 59 rotates in the forward rotation direction even when the film is lowered, the feeding of the film F is not hindered.

Then, the control device 9 operates the second feeder moving unit 64 while feeding the film F to the front by the first and second feeder units 61 and 62, and gradually moves the second feeder unit 62. And move it to the other side (upper side in FIG. 24). As a result, the portion of the film F that has been sandwiched between the lower belt 22 and the upper belt 23 is separated from the second feeder unit 62, but the succeeding portions of the film F become the second one.
It is clamped by the feeder unit 62. And FIG.
As shown in FIG. 4, the first and second feeder units 61 and 62 hold the film F in an expanded state as the film conveyance advances.

Even when the film F is hung on the film insertion plate unit 53 as shown in FIG. 30,
Since the film F is sandwiched between the lower belt 22 and the introduction belt 24 of the second feeder unit 62 during the film transportation performed before the second feeder unit 62 moves to the other side, the film transportation is performed thereafter. As it advances, the first and second feeder units 61 and 62 hold the film F in an expanded state.

When the second feeder unit 62 has finished moving to the position corresponding to the film width, for example, the position of the notch 53g, the controller 9 stops the feeding of the film F by the first and second feeder units. At this time, in the film insertion plate unit 53, as shown in FIG.
As shown in FIG. 5, both side portions of the film F pass through the notches 53a and 53g.

(Sixth Step) Here, the control device 9 operates the cutter mechanism 69 to cut the film F along the cutting line (dotted line) C in FIG. As a result, the film F after that has the first and second feeder units 61,
62 allows the sides to be received. (Seventh Step) Upon confirming the completion of the series of film initial setting controls as described above, the operator presses the emergency stop switch 19 to bring the first and second feeder units 61 into a state as shown in FIG. , 62 to remove the film F held.

<Characteristics of Packing Device> In the packing device 1 of this embodiment, the control device 9 is used during the initial film setting work.
However, the distance between the first and second feeder units 61 and 62 is increased while the film F is being conveyed. Therefore,
As shown in FIGS. 6 and 30, even when the film F is set in the film insertion plate unit 53 in the unexpanded state, the film F is gradually held in the expanded state during the initial film setting control. become. Then, when the distance between the first and second feeder units 61 and 62 corresponds to the film width, the film F is held in the film insertion plate unit 53 in a fully expanded state (see FIG. 25). , Both sides thereof are changed to a state in which they can be held by the first and second feeder units 61, 62.

As described above, in this packaging device 1, even if the operator does not set the film F pulled out from the film roll R with the leading end of the film F spread, that is, the film F is set with the leading end wrinkled. Even so, the film F is automatically expanded. Therefore, the film F that has been conventionally used in the initial setting of the film is performed.
This saves the operator the trouble of expanding the tip of the.

Further, the operator can put the film F on the film insertion plate unit 53, and then only press the film initial setting switch 50 to complete the film initial setting operation. That is,
Since the control device 9 automatically unfolds the film F, the operator only removes the leading end of the wrinkled film F at the end to complete the initial film setting operation. Therefore, the burden on the operator who performs the initial film setting operation is reduced, and the packaging device 1 that facilitates the film exchange and the like is realized.

[Second Embodiment] In the first embodiment, the film feeding mechanism 4 performs the initial film setting operation, but the film feeding mechanism 1 shown in FIG.
It is also possible to make the film initial setting work by 05. <Structure of Film Feeding Mechanism> The film feeding mechanism 105 shown in FIG. 26 includes a film hanging roller (film hanging tool) 105a and an initial setting plate (initial setting member).
105b and a driving tool (not shown) for moving the initial setting plate 105b up and down.

As shown in FIG. 26B, the initial setting plate 105b has a length equal to or larger than the film width of the film F, and is provided between the film roll R and the film hanging roller 105a in a front view. (Fig. 26
(See (a)). The upper end of the initial setting plate 105b has adhesiveness, and contacts the film F and holds it, as will be described later. Also, this initial setting plate 105b is
Lower belt 2 of the first and second feeder units 61, 62
It is arranged directly below the contact portion between the guide belt 2 and the introduction belt 24.

The film-placing roller 105a is arranged outside (on the right side in FIG. 26A) of the side end of the film roll R (right end in FIG. 26A), and the initial setting plate 1
05b is a film roll R and a film hanging roller 105
It is possible to pass vertically between a and. <Film Initial Setting Operation of Packaging Device> Next, a film initial setting method will be described.

(First Step) The setting of the film roll R is the same as in the first embodiment. (Second Step) Next, the operator pulls out the front end of the film F from the film roll R and hooks the front end of the film F on the film hooking roller 105a as shown in FIG.

At this time, the hooking operation of the film front end to the film hooking roller 105a does not need to spread the film front end and may be wrinkled as shown in FIG. 26 (b). Even in this state, the portion of the film F just fed from the film roller R has almost no wrinkles. (Third step) Next, the operator releases the emergency stop switch 19 and presses the film initial set switch.
Then, the control device 9 operates the feeder drive unit 65 of the film transport mechanism 6 to start driving the belts 22 to 24 of the first and second feeder units 61 and 62, and causes the film delivery mechanism 105 to feed the film F. It is delivered to the first and second feeder units 61, 62.

Specifically, the film feeding mechanism 105
Raises the initial setting plate 105b until it contacts the lower belt 22 and the introduction belt 24 of the first and second feeder units 61, 62. When the initial setting plate 105b starts to be lifted, as shown in FIG. 27, first, the upper end of the initial setting plate 105b comes into contact with the film F to start lifting the film F. At this time, the initial setting plate 105b
Since the upper end of the film F has adhesiveness, the film F is held on the upper end of the initial setting plate 105b without slipping.

At this time, the portion of the film F with which the initial setting plate 105b comes into contact is a portion immediately after being unwound from the film roll R, and is a portion that extends substantially to the full width of the film. Then, when the initial setting plate 105b further rises, a state as shown in FIG. 28 is obtained, and thereafter, the film F is drawn into the first and second feeder units 61 and 62 by the driving lower belt 22 and the introducing belt 24. . At this time, the force with which the first and second feeder units 61 and 62 pull in the film F is stronger than the film holding force of the initial setting plate 105b, so that the film F separates from the initial setting plate 105b. Then, the initial setting plate 105b descends, and the film F is conveyed by the first and second feeder units 61 and 62.

<Characteristics> This film feeding mechanism 105
Is a film F drawn from the film roll R and hung on the film laying roller 105a.
05b to hold the first and second feeder units 61,
Hand it over to 62. Since the initial setting plate 105b is arranged between the film roll R and the film hanging roller 105a, the initial setting plate 105b is very close to the film roll R in the film F drawn from the film roll R and is generally a film. It is possible to hold the part that extends the full width. Therefore, even when the operator hooks the drawn film F on the film hooking roller 105a without expanding it (see FIG. 26B),
The spread portion of the film F can be delivered to the first and second feeder units 61 and 62.

In the second embodiment, the film F is transferred by bringing the initial setting plate 105b holding the film F into contact with the lower belt 22 and the introduction belt 24 of the first and second feeder units 61 and 62. But
It is also possible to transfer the film F by changing the posture of the introduction belt 24 as in the first embodiment.

[Other Embodiments] In the first embodiment, the operator is made to pull out the leading edge of the film F from the film roll R. In order to reduce this work, as shown in FIG. 29, the adhesive belt unit is used. 55 can also be deployed. The adhesive belt unit 55 is provided on the front side (the lower side of FIG. 29 (b)) and the other side (the upper side of FIG. 29 (b)), respectively.
It is composed of an adhesive belt that is stretched around these pulleys and a motor (not shown) that drives them. In addition, this adhesive belt unit 55 can be manually operated as shown in FIG.
In (a), the position shown by the solid line and the position shown by the dotted line can be switched.

In the normal operation, the adhesive belt unit 55 is lowered to the position shown by the dotted line in FIG. 29 (a), but when the operator performs the film initial setting work, the film roll R is fixed to the roll bar 4a. After that, the adhesive belt unit 55 is raised until it comes into contact with the film roll R. Then, when pulling out the leading end of the film F from the film roll R, the adhesive belt is driven by the motor. Then, the leading end of the film F sticks to the adhesive belt and is automatically pulled out to the outside of the film roll R as shown in FIG.

As a result, the tip of the film F, which is difficult to find and grip, comes out from the film roll R, and the operator can move to the work of gripping and hanging it on the film insertion plate unit 53. If the leading edge of the film F is pulled out, the adhesive belt unit 55 is no longer necessary and is manually lowered.

[0086]

According to the present invention, the first and second feeders holding the first portion in the film width direction and the second portion in the film width direction of the film feed the film in the longitudinal direction, The control is performed so that the relative distance is expanded. Therefore, even when the film is set on the first and second feeders in a state where the film is not spread, the film is spread during the initial film setting control. As a result, it is possible to save the operator's trouble of expanding the leading end of the film when setting the film.

According to another aspect of the present invention, an initial setting member is provided between the roll holder and the film hanging device, and the initial setting member is a film drawn from the film roll, which is very close to the film roll and has a width substantially equal to the film width. It is possible to hold the spread part. Therefore, it is possible to bring the part where the initial setting member expands to the full width of the film to the feeder, and even when the film is hung on the film hanging tool without expanding the film, the part where the film is expanded is retained in the feeder. To be done. As a result, it is possible to save the operator's trouble of expanding the leading end of the film when setting the film.

[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 schematic plan view of the inside of the packaging device.

FIG. 5 is a schematic side view of the inside of the packaging device.

FIG. 6 is a side view of the film insertion plate unit.

FIG. 7 is a partially enlarged sectional view of a film insertion plate unit.

FIG. 8 is a correlation diagram of a feeder unit and a feeder moving unit.

FIG. 9 is a front view of a feeder unit.

FIG. 10 is a plan view of a feeder unit.

FIG. 11 is a side view of the feeder unit.

FIG. 12 is a plan layout view of a feeder unit.

FIG. 13 is a plan layout view of a clamp.

FIG. 14 is a block configuration diagram of a control device.

FIG. 15 is an operation explanatory view of the packaging device.

FIG. 16 is an operation explanatory view of the packaging device.

FIG. 17 is an operation explanatory view of the packaging device.

FIG. 18 is an operation explanatory view of the packaging device.

FIG. 19 is an operation diagram of a film initial set.

FIG. 20 is an operation diagram of initial film setting.

FIG. 21 is an operation diagram of film initial setting.

FIG. 22 is an operation diagram of a film initial set.

FIG. 23 is an operation diagram of a film initial set.

FIG. 24 is an operation diagram of film initial setting.

FIG. 25 is a correlation diagram between the film insertion plate unit and the film after the initial setting of the film.

FIG. 26 is a schematic view of a film feeding mechanism according to a second embodiment.

FIG. 27 is an operation diagram of a film initial set according to the second embodiment.

FIG. 28 is an operation diagram of a film initial set according to the second embodiment.

FIG. 29 is a schematic view of an adhesive belt unit of another form.

FIG. 30: Film F to film insertion plate unit
Hanging figure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 wrapping device 4 roll support mechanism 4a roll bar (roll holder) 5 film feeding mechanism 9 control device (control unit) 22 lower belt (transport belt) 23 upper belt (transport belt) 24 introduction belt 53 film insertion plate unit (film Hanging plate) 54 Film insertion plate drive motor (hanging plate driving tool) 61 First feeder unit (first feeder) 62 Second feeder unit (second feeder) 63 First feeder moving unit (feeder driving tool) 64 Second feeder Moving unit (feeder driving tool) 65 Feeder driving unit (belt driving tool) 105 Film feeding mechanism 105a Film hanging roller (film hanging tool) 105b Initial setting plate (initial setting member) F Film R Film roll T tray

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroaki Tokura, Inventor Hiroaki Tokura, 1 959 Shimoda, Ritto-cho, Kurita-gun, Shiga Ishida Co., Ltd. Shiga Works (72) Inventor Takeshi Kimura 1 Stock, 959, Shimoda, Ritto-cho, Kurita-gun, Shiga Company Ishida Shiga Works (56) Reference JP-A-9-183407 (JP, A) JP-A-9-169307 (JP, A) JP-A-7-125887 (JP, A) JP-A-9-95316 ( JP, A) JP-A-61-232116 (JP, A) Fukukaihei 6-54504 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65B 11 / 00-11 / 58 B65B 41/12

Claims (8)

(57) [Claims] 1. A packaging apparatus having a mechanism for pressing an object to be packaged against a film held in tension, comprising: a roll holder for rotatably holding a film roll; and a roll holder pulled out from the film roll held by the roll holder. Holding the film width direction first part of the formed film,
A first feeder for feeding the film in the longitudinal direction of the film, and a second part in the film width direction of the film drawn from the film roll held by the roll holder,
A second feeder for feeding the film in the longitudinal direction of the film; a feeder moving tool for changing the relative distance in the film width direction of the first and second feeders; and a relative distance in the film width direction of the first and second feeders by the feeder moving tool. A packaging device comprising: a control unit that performs a film initial setting control in which the film is fed in the film longitudinal direction by the first and second feeders while increasing the distance. 2. At least a second feeder of the first and second feeders, during the film initial setting control,
The packaging device according to claim 1, wherein the second portion in the film width direction to be held shifts outward in the film width direction as the film is fed in the film longitudinal direction. 3. The method according to claim 2, wherein at least the second feeder of the first and second feeders has two conveyor belts for sandwiching a film and a belt driving tool for driving the conveyor belts. Packaging equipment . 4. A film hanging plate which is provided between the roll holder and the first and second feeders and which can hang the leading end of the film drawn from the film roll held by the roll holder. And a hanging plate moving tool for moving the film hanging plate, wherein the control unit moves the hanging plate before the film is fed by the first and second feeders during the initial film setting control. The tip of the film hung on the film hung by a tool is moved to at least a position where the first feeder can hold the film, and at least the first feeder is held.
The packaging device according to claim 1, wherein the leading end of the film is held by a feeder. 5. A packaging apparatus having a mechanism for pressing an object to be packaged against a film held in tension, comprising: a roll holder for rotatably holding a film roll; and a roll holder provided in the vicinity of the roll holder. A film hanging tool that can hang the tip of the film drawn from the film roll held by a holding tool, a feeder that holds both sides of the film and feeds the film in the film longitudinal direction, the roll holder and the An initial setting member that is provided between the film hanging device and can hold a portion near the film roll of the film that is pulled out from the film roll held by the roll holding device and has its tip hung on the film hanging device; A packaging device comprising: a driving tool that moves a set member. 6. The packaging device according to claim 5, wherein the initial setting member has a length equal to or larger than a film width. 7. The initial setting member has an adhesive property or an adhesive property at a portion contacting the film.
Or the packaging device according to item 6. 8. The driving tool causes the film pulled from a film roll to be held by the initial setting member by moving the initial setting member, and the feeder holds the film held by the initial setting member. The packaging device according to any one of claims 5 to 7, which is moved to a position where it can be held.