JP2001106202A - Film feed mechanism for wrapping apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with operator's labor widening the forward end of a film in setting the film in a wrapping apparatus. SOLUTION: A film feed mechanism for a wrapping apparatus has a first and a second feeder units 61, 62 and a first and a second feeder moving units 63, 64. The first and second feeder units 61, 62 hold a film F drawn out from a film roll R to feed the film F. The first and second feeder moving units 63, 64 move the first and second feeder units 61, 62 in the width direction of the film. These feeder moving units 63, 64 allow the first and second feeder units 61, 62 to feed the film F while making greater the relative distance in the width direction of the film between the first and second feeder units 61, 62 when the film is initially set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding mechanism of a packaging device for packaging with a film and an initial setting method of the film in the packaging device, and more particularly to a packaging device for packaging while keeping the film in a stretched state.

[0002]

2. Description of the Related Art Heretofore, an apparatus for packing a packaged object such as fresh foodstuffs stored in a tray using styrofoam or the like with a stretch film is known as a stretch packaging apparatus. In this stretch packaging apparatus, 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. The film is transported to the packaging station while being packaged at the packaging station. The packaging station pushes up the packaged object stored in the tray against the conveyed film, and folds the peripheral portion of the film toward the bottom surface of the tray while keeping the packaged object in close contact with the film. As a result, the object to be packaged and the tray are wrapped in the stretch film. Thereafter, the film on the bottom surface of the tray is heat-sealed to complete the packaging.

[0003] Such a stretch packaging apparatus is disclosed in Japanese Patent Application Laid-Open No. 9-169307. The packaging device disclosed herein has been invented by the present applicant, and is a device that can quickly perform weighing and packaging. In the packaging apparatus disclosed in the above-mentioned publication, the film roll 3a is attached to the roll bar 13 of the roll support mechanism 4.
Is set, and the film 3 pulled out from this is set via the loading mechanism 42 to a pair of feeders (the transport units 18 and 1).
9). Then, the film roll 3a is initially set, and the film 3 is guided to a pair of feeders.
As described in the above-mentioned publication, a method having the following procedure is adopted.

First, the operator presses an emergency stop switch to stop the operation of the packaging device,
a is set on the roll support mechanism 4. Next, as shown by a chain line in FIG. 3 of the above publication, the loading mechanism 42 is rotated upward. Then, the film 3 unwound from the film roller 3a is placed on the conveyor belt of a pair of feeders in a state where the leading end portion of the film 3 is spread, the loading mechanism 42 is returned to the original position, and the film 3 is loaded by the loading belt 41 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 to the packaging station by a pair of feeders.

[0005] The initial setting method of such a film is as follows.
The same applies to other stretch packaging apparatuses, and the present situation is that an operator manually spreads the leading end of a film drawn from a film roll and sets it in the apparatus.

[0006]

Although the conventional packaging apparatus employs the above-described method for initial setting of a film, it is undeniable that the setting of the film is troublesome for an operator. This is because, after the leading end of the film is pulled out from the film roll, the film must be set in a transport mechanism (feeder) in a spread state. Stretch films are often thin and easily wrinkled, and setting the film in the transport mechanism while maintaining the stretched state is a cumbersome operation for the operator who initially sets the film.

[0007] Further, in the case of adopting a configuration such as the packaging device described in the above-mentioned publication, since the film roll is arranged on the side surface, when setting the film, the operator turns around the packaging device to perform work. There is a need.
However, a sufficient space is not always ensured on the side of the packaging device, and when the space is insufficient, the work of setting the film becomes more difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a film feeding mechanism of a packaging apparatus and an initial method of setting a film in the packaging apparatus, which can save the operator the trouble of expanding the front end of the film when setting the film. .

[0009]

A film feed mechanism according to a first aspect of the present invention is a film feed mechanism of a packaging apparatus having a mechanism for pressing an object to be packaged onto a film held in tension, wherein the roll holding tool and the first film feed mechanism are provided. A feeder, a second feeder, a feeder moving device, and a control unit are provided. The roll holder rotatably holds the film roll. First
The 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 second part in the film width direction of the film is the first part in the film width direction of the film.
The portion is a portion where the position in the film width direction is different. The feeder moving device changes the relative distance between the first and second feeders in the film width direction. Therefore, the position of the first part in the film width direction of the film held by the first feeder and the second part of the film held by the second feeder in the film width direction are not always the same. The control unit performs a film initial setting control. In the film initial setting control of the control unit, the first movement is performed by the feeder moving tool.
The first and second feeders feed the film in the longitudinal direction of the film while increasing the relative distance between the first and second feeders in the film width direction.

In the film feeding mechanism of the first aspect, in the initial film setting control, 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 move the film in the longitudinal direction. While sending
The relative distance along the film width direction is increased. Therefore, at the time of the initial film setting control, at least one of the first and second feeders gradually moves so as to hold the outside of the film. As described above, since the position of the film held by the feeder gradually shifts outward while feeding the film, even if the film is initially set in the first and second feeders in a state where the film is not spread, the initial film setting is performed. During the control, the film held by the first and second feeders gradually spreads. Then, when the relative distance between the first and second feeders is substantially equal to the width of the film, the state where both sides are held by the first and second feeders in a state where the film is spread is changed.

As described above, in the film feeding mechanism of the present invention, since the above-described initial film setting control is performed,
Even if the film pulled out from the film roll is not set on the first and second feeders in a state where the leading end of the film is spread, that is, even if the film is set on the first and second feeders with the leading end of the film being wrinkled, The film is automatically spread by control of the first and second feeders and the feeder moving device. 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 film feed mechanism according to a second aspect is the film feed mechanism according to the first aspect, wherein the first and second film feed mechanisms are provided.
In at least the second feeder of the feeders, the second part in the film width direction to be held is shifted outward in the film width direction as the film is fed in the film longitudinal direction during the initial film setting control. The film feed mechanism according to claim 3 is the film feed mechanism according to claim 2, wherein at least the second feeder among the first and second feeders has two transport belts sandwiching the film, and these transport belts And a belt driving tool for driving the

Here, the second feeder holds the film 2
When the second feeder shifts outward in the film width direction because of the two transport belts, the film sandwiched between the transport belts is such that the portion gripped by the second feeder shifts obliquely backward. Then, the state is finally shifted to a state where both sides are gripped by the first and second feeders. A film feed mechanism according to a fourth aspect is the film feed mechanism according to any one of the first to third aspects, further comprising a film hanging plate and a hanging plate moving device. The film hanging plate is provided between the roll holder and the first and second feeders, and can hang the leading end of the film drawn from the film roll held by the roll holder. The hanging tool driving tool is a driving tool for moving the film hanging plate. In the initial film setting control, the control unit operates the hanging plate moving device to move the leading end of the film hung on the film hanging device to at least the first feeder before the first and second feeders feed the film. Is moved to a position where it can be held, and the leading end of the film is held by at least the first feeder.

Here, instead of the operator manually setting the leading end of the film pulled out from the film roll to the first and second feeders, the film hanging plate and the hanging plate moving device for driving the film hanging plate automatically move the first leading edge. And the second
It can be set on the feeder. That is, if the operator hangs a film whose tip 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 causes the first and second feeders to move. Feeder (or first feeder)
Hold the leading edge of the film. Then, the first and second
When the film is fed while the feeder spreads, the film is held by the first and second feeders in a spread state. When the film is started to be fed by holding the leading end of the film only in the first feeder, the second feeder also gradually holds the film in accordance with the feeding of the film, and the movement of the first and second feeders thereafter causes The film to be sent will be gradually spread.

Therefore, in the film feeding mechanism of the present invention, the operator only has to hang the film on the film hanging plate without expanding the front end of the film, and the operator's work for initial setting of the film in the packaging apparatus is facilitated, The packaging device becomes easy to use. The film feed mechanism according to claim 5, wherein the film feed mechanism of the packaging apparatus having a mechanism for pressing the packaged object against the tensioned film, the roll holding tool, the film hook, the feeder, and the initial setting member. And a driving tool.
The roll holder rotatably holds the film roll. The film hook is provided in the vicinity of the roll holder, and can hang the leading end of the film drawn from the film roll held by the roll holder. The feeder holds the film on both sides and feeds the film in the longitudinal direction of the film. The initial set members are
It is provided between the roll holder and the film hook. The initial setting member can hold a portion of the film pulled out from the film roll held by the roll holder and hung on the film hanging tool near the film roll. The driving tool moves the initial setting member.

Here, the film pulled out from the film roll and hung on the film hanging tool can be held by the initial setting member and taken to the feeder by the driving tool. Since the initial setting member is provided between the roll holding device and the film hanging device, the initial setting member holds a portion of the film drawn from the film roll, which is very close to the film roll and is almost entirely spread over the film width. can do.

As described above, in the film feed mechanism according to the present invention, the initial setting member can hold a portion of the film drawn from the film roll which is extremely close to the film roll and take it to the feeder. Even when the operator pulls the drawn film on the film hanging tool without spreading the film, the spread portion 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.

According to a sixth aspect of the present invention, there is provided the film feeding mechanism according to the fifth aspect, wherein the initial setting member has a length equal to or greater than the film width. here,
Since the length of the initial setting member is longer than the film width, the initial setting member can more reliably hold the film. The film feed mechanism according to claim 7 is the same as claim 5.
Or the film feeding mechanism according to 6, wherein the initial setting member has adhesiveness or adhesiveness at a portion in contact with the film.

Here, since the initial setting member has adhesiveness or adhesiveness, it is not necessary to provide a member for holding the film, so that the structure is simplified and the space can be saved. become. The film feed mechanism according to claim 8 is the film feed mechanism according to any one of claims 5 to 7, wherein the driving tool moves the initial setting member to initialize the film drawn from the film roll. The film held by the setting member is further moved to a position where the film held by the initial setting member can be held by the feeder.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 shows a film-transport type packaging apparatus according to an embodiment of the present invention.
This packaging apparatus 1 is an apparatus that pushes up products such as fresh food products placed on a tray against a stretched film F held in tension, and folds a peripheral portion of the film F toward the bottom side of the tray to perform film packaging. . In addition, the packaging device 1 has a weighing function and a labeling function by labeling in addition to a film packaging function.

<Overall Outline of Apparatus> As shown in FIGS. 1 and 2, the packaging apparatus 1 includes a weigh-in / carry-in mechanism 2, a packaging station 3, a roll support mechanism 4, a film delivery mechanism 5, and a film transport mechanism. 6, a folding mechanism 7, and a sealing mechanism 8. The weigh-in / carry-in mechanism 2 includes a main body 1a.
Is provided at the center of the front of the camera. 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
Sends out the film F pulled out 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 packages the article to be packaged by the film F transported to the packaging station 3. The sealing mechanism 8 performs heat sealing on the film F folded on the bottom side of the packaged object by the folding mechanism 7.

A display panel 9 is provided above the main body 1a.
A control device (control unit) 9 having a and operation keys 9b is arranged. The control device 9 includes the mechanisms 2 and 2 described above.
In addition to controlling the operations of 5, 6, 7, and 8, the price of the product G is calculated based on a signal indicating the weight of the product G measured by the weighing-in mechanism 2, and the weight and the price of the product G are calculated. The operation of a label printer 10 and a label issuing machine 11 for printing on a label is controlled.

The film roll R used in the packaging apparatus 1 has a stretch film F having a predetermined width dimension wound multiple times. <Measurement Delivery Mechanism> The measurement delivery mechanism 2 includes a weighing device that measures the weight of a product G such as food stored in the tray T, and a plurality of delivery belts stretched between a pair of rollers.
The carry-in belt is provided with a protrusion for conveyance. If the tray T containing the goods G is placed on the measuring device (above the carry-in belt) as shown in FIG. 3, the weight of the goods G is measured by the measuring device. 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 pressed.
0 (described later) (see FIGS. 15 and 16).

<Packaging Station> Packaging Station 3
Is a space in the main body 1a in which a series of film packaging processing is performed on the goods G in the tray T, which has been weighed. In the 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 product G (see FIG. 17). Then, the folding mechanism 7 folds the peripheral portion of the film F into the bottom surface 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.

Below the packaging station 3, a lifter mechanism 30 for holding the bottom surface of the tray T and moving the tray T and the goods G upward is provided. The lifter mechanism 30 includes a support base 31 as shown in FIG.
And a plurality of support bars 32 fixed on the support base 31
And a support member 33 rotatably supported on the upper end of each support bar 32 and receiving the bottom surface of the tray T. In addition, the lifter mechanism 30 includes an electric ball screw mechanism 34 that moves the support base 31 up and down at a lower portion.

Each support bar 32 is provided with a hinge that bends back and forth and right and left at a central portion thereof.
When you enter the lower part of the tent, it will temporarily fall. <Roll Support Mechanism> Roll support mechanisms (roll holders) 4 for supporting 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 mainly includes a roll bar 4a.

The roll bar 4a is used for a film roll R
And 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 thereof (see FIG. 2). The belt 4c is driven according to the rotation of a film roll drive 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 and 62 of a 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. And a film insertion plate driving motor (hanging plate driving tool) 54 to be driven.

The feeding roller 51 is provided with a roll support mechanism 4.
The roller is disposed obliquely above the film roll R held outside and outside the film roll R, and extends longer than the film roll R along the longitudinal direction of the film roll R (FIGS. 2 and 5). reference). The feed roller 51 is connected to a feed motor 52 via a belt, and is rotated by the operation of the feed 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. This film insertion plate unit 53 also extends longer than the film roll R along the longitudinal direction of the film roll R. More specifically, referring to FIGS. 6 and 7, the film insertion plate unit 53 includes two plates 57, 58 each having one end connected by a hinge (not shown), and a plurality of one-way plates supported by the plate 57. And 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 notch 53a and the outside of the notch 53g substantially matches the film width of the film F having the largest film width. The plate 58
Is rotated about a hinge 57 (not shown) with respect to the plate 57, so that the plate 58 can be opened and closed as shown in FIG. 4 (the state shown by a dotted line in FIG. Represents the open state).

A plurality of one-way rollers 59 are provided along the longitudinal direction (film width direction) of the plate 57, and hold the film F so that the film F sandwiched between the plates 57 and 58 does not fall down. Fulfill. The one-way roller 59 has a resin main body plated with metal such as nickel to reduce inertia because the film insertion plate unit 53 moves up and down. Since the surface of the one-way roller 59 protrudes more toward the plate 58 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. .

By the presence of such a one-way roller 59, when the plate 58 is closed and the film F is sandwiched between 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
Is cut off, the film F is held by the one-way roller 59 and does not fall down.

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. Specifically, it plays the role of switching the height position of the film insertion plate unit 53 between the position indicated by the solid line and the position indicated 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 the above is received and conveyed to the central portion of the packaging station 3, and the film F is held in tension. This film transport mechanism 6 mainly includes
The first feeder unit 61 and the second feeder unit 6
2 and 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 located on the near side as viewed from the front of the apparatus 1, and the second feeder unit 62 is located on the apparatus 1 side.
(See FIGS. 4 and 12). These first and second feeder units 6
Reference numerals 1 and 62 sandwich the both sides (the front side and the opposite side) of the horizontally fed film F with a belt, and convey the film F by the operation of the feeder driving 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 in the film width direction (FIGS. 3, 4 and 12). (Left / right direction of the camera). Each of the feeder units 61 and 62 is supported by slide shafts 66 and 67 extending along the film width direction at two locations so as to be movable in the film width direction.

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

(Details of Feeder Unit) Next, the structure of the first and second feeder units 61 (62) will be described in detail. Since the configurations of the two feeder units 61 and 62 are substantially the same, the first feeder unit 61 will be described below as an example. 9 to 11 show detailed views of the first feeder unit 61. FIG. These drawings include clamps 25 to 29 which are not shown in FIGS. 1 to 8. FIG. 12 is a top view of the first and second feeder units 61 and 62 including the clamps 25 to 29.
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 introduction belt 24, and main clamps 25 to.
27 and auxiliary clamps 28 and 29. (Frame) The frame 21 supports pulleys that support the belts 22 to 24 and supports the clamps 25 to 29, and forms a skeleton of the first feeder unit 61. Further, the frame 21 is provided between the upper belt and the lower belt of the lower belt 22, generally, belts 22 and 23.
And a band plate 21a having the same width as the above. This strip 2
1a plays a role of sandwiching the belts 22, 23 and the film F between the main clamps 25 to 27 described later.

(Belt) The lower belt 22 comes into contact with the film F from below, and is stretched over 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 belts 22 of the feeder units 61 and 62 move synchronously.

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 over four pulleys. The introduction belts 24 are respectively arranged outside both ends in the longitudinal direction of the lower belt 22 and are in contact with a vertically extending portion of the lower belt 22. The introduction belt 24 can be switched between a state shown by a solid line and a state shown by a one-dot chain line in FIG. In the state shown by the one-dot chain line in FIG.
And a film F held by the film insertion plate unit 53 of the film feeding mechanism 5 can enter the gap. That is, the introduction belt 24 has a role of sandwiching the film F sent from below by the film delivery mechanism 5 with the lower belt 22 and guiding it between the lower belt 22 and the upper belt 23.

It should be noted that the film F held by the film insertion plate unit 53 includes the lower belt 22 and the introduction belt 24.
The belts 22 and 2
In view of the fact that the film F is pinched by the position No. 4, the position in the film width direction of any one of the notches 53a to 53g of the film insertion plate unit 53 matches the position in the film width direction of both belts 22, 24. Feeder unit 6
The positions in the film width direction 1, 62 are set (FIG. 6).
reference).

(Main Clamp) Main Clamp 25-
Numeral 27 is disposed between the upper belt and the lower belt of the upper belt 23.
It is arranged in the position which overlaps. These clamps 25
27 are operated by a solenoid (not shown) (an electromagnetic actuator fixed to the outer surface of the frame 21). The clamps 25 to 27 are usually provided on both belts 22, 23.
When the solenoid is turned on, it is depressed and applies a downward force to the lower belt of the upper belt 23 and the upper belt of the lower belt 22 to apply these forces to the belt 21a. With a strong pinch. 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 be
When the solenoid is turned off, the holding of the film F is released.

(Auxiliary Clamp) Auxiliary Clamps 28 and 29
Are the main clamps 25 that are aligned in a plane.
~ 27. In particular,
As shown in FIG. 13, main clamps 25 to 27 are arranged so as to overlap belts 22 and 23, and belts 22 and 23 are
Each of the auxiliary clamps 28 and 29 is disposed at a position deviated inward from the belts 22 and 23, while the film F is held by holding the film F directly. I have. Hereinafter, since the configuration of the auxiliary clamps 28 and 29 is the same, the auxiliary clamp 28 will be described as an example.

As shown in FIGS. 9 to 11, the auxiliary clamp 28 mainly includes a fixed contact portion 28a located above the film F and a movable contact portion 28b located below the film F. It is composed of When the moving contact portion 28b moves upward, the film F is strongly clamped by 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 (the left-right direction in FIG. 10 and the up-down direction in FIG. 13), and has a rounded lower surface in order to protect the film F. The fixed contact portion 28a is fixed to the frame 21 via an L-shaped fixing tool 28d (see FIG. 11). The moving contact portion 28b is moved up and down by a solenoid 28c, and extends in the film transport direction. However, the length of the moving contact portion 28b in the film transport direction is shorter than that of the fixed contact portion 28a. Solenoid 2 for moving this 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 in front of the film transport mechanism 6 in the film transport direction. The cutter mechanism 69 is provided to cut the film F between the two 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. 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 when the film F is fed from the right front film roll R and the other for when the film F is fed from the front left film roll R. (See FIG. 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 bar 79.

The left and right folding plates 76 and 77 are made of film F
Are folded into the bottom surface of the tray T, and can be moved horizontally by a motor and a timing belt (not shown). The rear folding plate 78 is provided on the side of the second feeder unit 62 of the film F in the tray T.
And can be moved horizontally by a motor and a timing belt (not shown).

When the tray T is discharged by the discharge pusher 79a that pushes the tray T toward the sealing mechanism 8 side, the side portion of the film F on the first feeder unit side is folded into the bottom surface side of the tray T. Are arranged as follows. <Seal Mechanism, Label Printer, Label Issuer> The seal mechanism 8 serves to heat and seal the bottom surface of the tray T extruded by the discharge pusher 79a, and the front part also serves as a discharge table. . Then, the label issuing machine 11 affixes the label printed by the label printer 10 to the packaged 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, 8, 10, 11 Control behavior. The operation by the operator is performed by the operation key 9
b, other switches and dials 16, 17, 18, 1
9, 50 also accepts.

<Outline of Operation of Packaging Apparatus> Next, the operation of the packaging apparatus 1 having the above configuration will be briefly described. In the present apparatus 1, when the operator places the tray T containing the product G on the weighing device of the weighing and carrying-in mechanism 2, the carrying-in belt starts moving after the weighing value is stabilized and the weighing is completed.
The protrusion fixed to the carry-in belt moves in accordance with the movement of the carry-in belt, and pushes out the tray T on which the product G is loaded 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 and is formed into a single rectangular film F by the lifter mechanism 30. It is carried to the upper side by both feeder units 61 and 62. Above the lifter mechanism 30, the periphery of the film F is strongly held by the operation of the clamps 25 to 29.

Then, the lifter mechanism 30 pushes up the product G and the tray T against the film F whose periphery, particularly both sides are strongly held as described above (see FIG. 17). Then, the film F, which is strongly held around, extends so as to cover the commodity G and the upper part of the tray T. In this state, when the rear folding plate 78 and the left and right folding plates 76 and 77 move horizontally to the bottom side of the tray T, the clamps 25 to 29 other than the clamps on the front side (the left side in FIG. 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, one side of the unfolded front side film F hits the front folding rod 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 is released from holding 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. Becomes

Further, when a process including label sticking is selected, the price and weight of the product calculated based on the weighed value are printed on the label by the label printer 10 and the label is printed by the label issuing machine 11. To the packaged product G and the tray T. <Initial film setting operation of packaging device> Next, a description will be given of a film initial setting method which is performed when the packaging device 1 is first used or when the film F wound on the film roll R is completely used up.

(First Step) When the film roll R is replaced or newly set and the packaging device 1 is ready for use, the operator presses the emergency stop switch 19 first.
Then, the supply of power to the driving parts of each mechanism is cut off, and malfunction of the driving parts during work is prevented.

Then, the operator operates the film exchange door 1b and the side cover 1c (FIG. 1) on the side of the packaging apparatus 1.
(See). By opening the side cover 1c, the film roll R can be inserted from the front into the roll bar 4a.
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 shown by the dotted line in FIG. 3). Then, as shown in FIG. 19, the plates 57 and 58 are separated from each other on the front side, so the operator pulls out the leading end of the film F from the film roll R, and as shown in FIG. From the inside to the outside of the plate 58.

At this time, the work of hooking the leading end of the film to the plate 58 does not require the leading end of the film to be spread and hung.
As shown in FIG. 6, the notch 53a on the front side and the notch 53b
If the film F is hung over, the film F does not have to be hung on each of the notches 53c to 53g on the other side. Also, as shown in FIG.
Although it is desirable that the film F is applied to the notch 3b, as shown in FIG. 30, as long as the film F is applied to the notch 53a, the film F does not necessarily need to be applied to the notch 53b.

Therefore, the operator does not need to go around the side of the packaging device 1 to perform the work, but reach out from the front side and cut out only the front side portion of the leading end of the film.
3a and 53b. Then, the operator closes the plate 58 after hanging the film F on 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 this film initial set switch 50 is omitted in FIG. 5, it is a switch that can be seen on the front side of the side of the packaging device 1 when the film exchange door 1b is opened.

When the switch 50 is pressed, the control device 9 controls the film feeding mechanism 5 and the film transport mechanism 6
To perform a series of initial film setting control. First, the control device 9 moves the film transport mechanism 6 and
The belts 22, 23, and 24 of the feeder unit 61 are positioned at the position of the notch 53a in the film width direction, and the belts 22, 23, and 24 of the second feeder unit 62 are positioned at the position of the notch 53b in the film width direction. For example, FIG.
If the first feeder unit 61 is located at the position of the notch 53a and the second feeder unit 62 is located at the position of the notch 53g as shown in (a), the second feeder unit as shown in FIG. 62 comes to the front side and stops at the position of the notch 53b. As a result, the first and second
The film F can be received by the feeder units 61 and 62 when the film F hanging on 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 introduction belt 24 so as to open a gap between the lower belt 22 and the introduction belt 24, and Then, the film insertion plate unit 53 is raised so that the film F held therein enters. At this time, the feeding roller 51 is also rotated.

Then, the posture of the introduction belt 24 is returned to the original position, and the film F in the notches 53a and 53b is removed.
The first and second feeder units 61 and 62 are held between the lower belt 22 and the introduction belt 24, respectively. When the film F is hung only in 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 transporting the film F, and starts the film insertion plate. The unit 53 is lowered. The state at this time is shown in FIG. The leading end of the film F is connected to each of the feeder units 61 and 62.
Between the lower belt 22 and the introduction belt 24.
And the film F is passed between the upper belt 23 and the film F continues from the film insertion plate unit 53 to the film roll R. The film insertion plate unit 53
Is lowered, the one-way roller 59 rotates in the forward rotation direction, so that the feeding of the film F is not hindered.

Then, the controller 9 operates the second feeder moving unit 64 while feeding the film F forward by the first and second feeder units 61 and 62, and gradually moves the second feeder unit 62. 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 subsequent portions of the film F successively become the second feeder unit 62.
It is sandwiched by the feeder unit 62. And FIG.
As shown in FIG. 4, as the film transport proceeds, the first and second feeder units 61 and 62 hold the film F in a spread state.

When the film F is hung on the film insertion plate unit 53 as shown in FIG.
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 transport performed before the second feeder unit 62 moves to the other side, the film transport is thereafter performed. As the process proceeds, the first and second feeder units 61 and 62 hold the film F in a spread state.

When the second feeder unit 62 has moved to a position corresponding to the film width, for example, the position of the notch 53g, the control device 9 stops feeding the film F by the first and second feeder units. At this time, in the film insertion plate unit 53, FIG.
As shown in FIG. 7, both sides of the film F pass through the notch 53a and the notch 53g.

(Sixth Step) Here, the controller 9 operates the cutter mechanism 69 to cut the film F along the cutting line (dashed line) C in FIG. As a result, the subsequent films F are fed into the first and second feeder units 61,
62 allows both sides to be received. (Seventh step) After confirming the completion of the series of initial film setting controls as described above, the operator presses the emergency stop switch 19 and the first and second feeder units 61 in the state shown in FIG. , 62 are removed.

<Characteristics of Packaging Apparatus> In the packaging apparatus 1 of this embodiment, the control device 9
Increases the distance between the first and second feeder units 61 and 62 while transporting the film F. Therefore,
Even when the film F is set in the film insertion plate unit 53 in a state where the film F is not spread as shown in FIGS. 6 and 30, the film F is gradually maintained in the spread 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 by the film insertion plate unit 53 in a state of being fully spread (see FIG. 25). Then, both sides are changed to a state in which they can be held by the first and second feeder units 61 and 62.

As described above, in the packaging apparatus 1, the operator sets the film F drawn out of the film roll R without setting the tip of the film F in an expanded state, that is, setting the film F with wrinkles at the tip. , The film F is automatically spread. For this reason, in the operation at the time of initial setting of the film, the film F which is conventionally performed is used.
This saves the operator the trouble of expanding the tip of the device.

Further, if the operator places the film F on the film insertion plate unit 53 and then presses the film initial setting switch 50, the initial film setting operation can be substantially completed. That is,
Since the control device 9 automatically spreads the film F, the operator only needs to remove the tip portion of the wrinkled film F at the end to complete the operation of the initial film setting. Therefore, the burden on the operator who performs the initial film setting operation is reduced, and the packaging device 1 that facilitates film exchange and the like is realized.

[Second Embodiment] In the first embodiment, the film initial setting operation is performed by the film feeding mechanism 4, but the film feeding mechanism 1 shown in FIG.
It is also possible to perform the initial setting operation of the film by using the step 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 vertically moving the initial setting plate 105b.

As shown in FIG. 26B, the initial setting plate 105b has a length equal to or greater 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)
(A)). The upper end of the initial setting plate 105b has an adhesive property, and contacts and holds the film F as described later. Also, this initial set plate 105b is
Lower belt 2 of first and second feeder units 61 and 62
It is arranged immediately below a contact portion between the second belt 2 and the introduction belt 24.

The film hanging roller 105a is disposed outside (right side in FIG. 26A) the side end of the film roll R (right end in FIG. 26A).
05b is a film roll R and a film hanging roller 105
a can be passed almost vertically. <Initial film setting operation of packaging device> Next, a method of initial film setting 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 leading end of the film F from the film roll R and places the leading end of the film F on the film hanging roller 105a as shown in FIG.

At this time, the work of hooking the leading end of the film onto the film hanging roller 105a does not need to spread the leading end of the film, and may be wrinkled as shown in FIG. 26 (b). Even in this state, almost no wrinkles are formed in the portion of the film F just unwound from the film roller R. (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 each of the belts 22 to 24 of the first and second feeder units 61 and 62, and the film feed mechanism 105 feeds the film F. It is delivered to the first and second feeder units 61 and 62.

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

At this time, the portion of the film F that comes into contact with the initial setting plate 105b is a portion immediately after being unwound from the film roll R, and is a portion that is spread substantially over the entire 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 driven lower belt 22 and the introduction belt 24. . At this time, the film F is separated from the initial setting plate 105b because the force by which the first and second feeder units 61 and 62 draw the film F is stronger than the film holding force of the initial setting plate 105b. Then, the initial setting plate 105b descends, and the film F is transported by the first and second feeder units 61 and 62.

<Features> This film feeding mechanism 105
The film F pulled out from the film roll R and hung on the film hanging roller 105a
05b, the first and second feeder units 61,
Transfer to 62. Since the initial setting plate 105b is disposed between the film roll R and the film hanging roller 105a, the initial setting plate 105b is very close to the film roll R of the film F drawn out of the film roll R and is substantially close to the film roll R. It is possible to hold the part that spreads over the entire width. Therefore, even when the operator hangs the drawn film F on the film hanging roller 105a without spreading the film F (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 set 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 required to carry out the operation of pulling out the leading end of the film F from the film roll R. In order to reduce this operation, as shown in FIG. 55 can also be deployed. The adhesive belt unit 55 is provided on the front side (the lower side in FIG. 29B) and on the other side (the upper side in FIG. 29B).
It is composed of an adhesive belt wound around these pulleys and a motor (not shown) for driving them. The adhesive belt unit 55 is manually operated as shown in FIG.
In (a), switching between the position indicated by the solid line and the position indicated by the dotted line is possible.

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

As a result, the leading end of the film F, which is difficult to find and grasp, comes out of the film roll R, so that the operator can grasp the film F and move on to the film insertion plate unit 53. Note that if the leading end of the film F is pulled out, the adhesive belt unit 55 is not required, and is manually lowered.

[0086]

According to the present invention, the first and second feeders holding the first part in the film width direction and the second part in the film width direction are fed along the film width direction while feeding the film in the longitudinal direction. Control is performed to increase the relative distance. 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. This saves the operator the trouble of expanding the front end of the film when setting the film.

According to another aspect of the present invention, the initial setting member is provided between the roll holder and the film hook, and the initial setting member is substantially full of the film width very close to the film roll among the films drawn from the film roll. The part that spreads out can be held. Therefore, the part where the initial setting member spreads almost the entire width of the film can be taken to the feeder, and even if the film is hung on the film hook without spreading the film, the part where the film has spread is retained in the feeder. Is done. This saves the operator the trouble of expanding the front end of the film when setting the film.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a packaging device according to an embodiment of the present invention.

FIG. 2 is a schematic front view of the inside of the packaging device.

FIG. 3 is a schematic view taken along the line III-III in FIG. 2;

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 cross-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 the 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 diagram of a control device.

FIG. 15 is an explanatory diagram of the operation 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 an initial film setting.

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

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

FIG. 22 is an operation diagram of an initial film setting.

FIG. 23 is an operation diagram of an initial film setting.

FIG. 24 is an operation diagram of an initial film 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 an initial film setting according to the second embodiment.

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

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

FIG. 30 shows a film F inserted into a film insertion plate unit.
Figure of hang.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 packaging device 4 roll support mechanism 4 a 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 drive) 61 First feeder unit (first feeder) 62 Second feeder unit (second feeder) 63 First feeder moving unit (feeder drive) 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

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobushige Laboratories 959, Shimogaku, Ritto-cho, Kurita-gun, Shiga Prefecture Inside the Ishida Shiga Plant (72) Inventor Hiroaki Tokura 959, Shimoguka, Ritsuto-cho, Kurita-gun, Shiga Prefecture Ishida Shiga Plant (72) Inventor Takeshi Kimura F-term (reference) 3E051 AA08 AB05 BA12 CA03 CA08 CB05 DA10 EA05 EB03 EB10 FB02 at 959 Shimogoku, Ritto-cho, Kurita-gun, Kurita-gun, Shiga Prefecture FC02 JA01 JA02 KA02 KA07 KB03 LA02 LA04 LA07 LB05

Claims (8)

[Claims] 1. A film feeding mechanism for a packaging apparatus having a mechanism for pressing an object to be packaged against a tensioned film, comprising: a roll holder for rotatably holding a film roll; and a roll holder for holding the film roll. Holding the first part in the film width direction of the film pulled out from the film roll,
A first feeder for feeding the film in the film longitudinal direction, and a film width direction second part of the film pulled out from the film roll held by the roll holder,
A second feeder that feeds the film in the longitudinal direction of the film, a feeder moving device that changes a relative distance in the film width direction between the first and second feeders, and a film width direction relative to the first and second feeders by the feeder moving device. A film feed mechanism comprising: a control section for performing a film initial setting control for feeding the film in the longitudinal direction of the film by the first and second feeders while increasing the distance. 2. At least a second feeder of the first and second feeders is controlled at the time of the film initial setting control.
2. The film feed mechanism according to claim 1, wherein the held second portion in the film width direction shifts outward in the film width direction as the film is fed in the film longitudinal direction. 3. The apparatus according to claim 2, wherein at least a second feeder of the first and second feeders has two conveyor belts for sandwiching a film, and a belt driving device for driving the conveyor belt. Film feed mechanism. 4. A film hanging plate provided between the roll holder and the first and second feeders and capable of hanging a leading end of a film drawn from a 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 feeding the film by the first and second feeders during the initial film setting control. The tip of the film hung on the film hook by the tool is moved to a position at which the first feeder can hold at least the first film.
The film feed mechanism according to claim 1, wherein a leading end of the film is held by a feeder. 5. A film feeding mechanism for a packaging apparatus having a mechanism for pressing an object to be packaged against a tensioned film, comprising: a roll holder for rotatably holding a film roll; and a roll holder provided near the roll holder. A film hook that can hang the leading end of the film drawn from the film roll held by the roll holding tool; a feeder that feeds the film in the longitudinal direction of the film while holding both sides of the film; An initial setting member that is provided between a holder and the film hook and that can hold a portion near a film roll of a film pulled out from a film roll held by the roll holder and hung on the film hook; And a driving tool for moving the initial setting member. 6. The film feeding mechanism according to claim 5, wherein said initial setting member has a length equal to or greater than a film width. 7. The initial setting member has adhesiveness or adhesiveness at a portion that comes into contact with the film.
Or a film feed mechanism according to 6. 8. The driving tool moves the initial setting member to hold the film drawn from the film roll on the initial setting member, and further feeds the film held on the initial setting member to the feeder. 8. The film feeding mechanism according to claim 5, wherein the film feeding mechanism is moved to a position where the film can be held.