JP4592168B2 - Stretch film packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stretch film packaging machine for packaging a film after pushing up an object to be packaged from below toward a film stretched on a packaging station.
[0002]
[Prior art]
In this type of wrapping machine, there are cases where the conveyance of the film fails or the film is conveyed on a test basis. In such a case, it is necessary to remove the film.
[0003]
[Problems to be solved by the invention]
However, since the film is stretched around a packaging station in the back of the packaging machine, it is troublesome to insert an arm or hand into the back of the packaging machine to remove a large area film. In addition, a heater for film welding is provided at a product outlet into which an arm or a hand is inserted, and the heater interferes with the removal work.
[0004]
Accordingly, an object of the present invention is to provide a stretch film packaging machine and a method for removing a film in a stretch film packaging machine for simplifying and facilitating film removal.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the packaging machine of the present invention pulls out a film from a film roll, sandwiches both side edges in the width direction of the film with a pair of transport belts, transports them to the packaging section, and transports them to the packaging section. The film is clamped by clamping means inside or outside in the width direction of the conveyor belt, the package is pushed up from the lower side of the film by an elevator mechanism, and the upper surface of the package is covered with the film. A stretch film wrapping machine that folds the end of the wrapping material into the bottom surface of the package, and a wrapping mode for wrapping the package with a film, and a wrinkle on the film to remove the film from the wrapping unit A film removal mode for shrinking the film in the transport direction, and in the packaging mode, the clamping means clamps the film, Applying tension to the film of the packaging unit, and in the film removal mode, the clamping means is closed to prevent the film from being conveyed in the conveyance direction of the film conveyed to the packaging unit or in the opposite direction, The transport belt is driven so that the film is transported toward the dammed portion in the packaging portion in a state where the wrapping portion is blocked without being transported .
[0006]
In the film removal mode, the transport belt is driven in a state in which a part of the transport direction of the film transported to the packaging unit is blocked, and the film is transported in the transport direction so that many wrinkles approach the film. And shrink the film.
[0007]
In the present invention, as the “damping means”, the front end portion, the rear end portion or the vicinity thereof in the film transport direction is constituted by the clamp means . Also, in the case of clamping the film, the conveyance direction of the intermediate portion of the film (corresponding to a portion) may be clamped.
Furthermore, you may change the part to clamp.
[0008]
Clamp means for clamping in the width direction of the inner or outer than the conveyor belt are conveyed to packaging unit film. Or hunt clamping means, because provided as to impart tension to the film of the packaging unit.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
This embodiment demonstrates a packaging sticking system. The packaging sticking system has a sticking function for sticking a label after packaging in addition to the function of a stretch film packaging machine for packaging the product M in FIG. In the following description, the product M is transported on the tray T. The “product M” includes the contents in the tray T, the contents, the tray T, and the film F. Sometimes it is used in the concept. Further, the product does not necessarily have to be placed on the tray T.
[0010]
Basic structure:
As shown in FIG. 1, the present packaging sticking system is a front discharge type packaging sticking system that carries a product M from the front side 2a and discharges it to the front side 2a. 20 is provided.
[0011]
In FIG. 2, the supply device 20 supplies a tray (package) T on which the product M is placed on the lifter 201. Each post 210 of the lifter 201 is disposed directly below the packaging station (packaging section) S of the packaging mechanism 200 and can be moved up and down by an elevating means (elevator mechanism) 208. When the product M is supplied from the supply device 20, the lifter 201 rises and lifts the product M to the packaging station S.
[0012]
On the other hand, prior to the packaging operation, the stretched film F is supplied to the packaging station S by a pair of conveying belts 202 and 202. The film F is in close contact with the upper surface of the product M when the product M is pushed up. In this state, the film folding mechanism 203 moves the front and rear of the film F by a pair of left and right folding plates 204, 204, a rear folding plate 205, a round bar-shaped front folding member 206, and a pusher 207 (Fig. 2). The left and right side edges are folded to the bottom side of the tray T to package the product M, and the packaged product is conveyed onto the heat welding conveyor 211 of FIG. The heat welding conveyor 211 welds the films F folded on the bottom surface to each other, and then the tray T is discharged onto the discharge table 209.
[0013]
On the other hand, above the packaging station S, a label printer (label issuing unit) 12 for issuing a label according to the contents of the product and a label sticking machine 13 are arranged. The label applicator 13 applies the label issued from the label printer 12 to the upper surface of the product M until the product M is discharged onto the discharge table 209.
[0014]
Configuration of main parts:
As shown in the front sectional view of FIG. 4, the system includes a pair of film rolls Fr on the left and right sides, and a film passing means 5 for supplying the film F drawn from the film rolls Fr to the conveying belt 202 and A pair of cutting devices 6 are provided on the left and right, respectively. The transport belt 202 has a pair of belts that sandwich and transport the film F. The film passing means 5 introduces the film F drawn from the film roll Fr into the transport belt 202. After the film F is transported by a predetermined amount by the transport belt 202, the cutting device 6 cuts the film F.
As shown in the plan sectional view of FIG. 5, the conveyor belts 202, 202 convey the film F to the packaging station S while sandwiching both side edges in the width direction Y of the film F.
[0015]
The packaging station S is provided with clamping means for clamping both side edges in the width direction Y of the film F during the packaging operation. The clamping means is composed of a main clamp 4 and auxiliary clamps 3a and 3b.
[0016]
The main clamp 4 shown in FIG. 4 clamps the film F via the belt by sandwiching the pair of belts of the conveyor belt 202 from above and below.
[0017]
As shown in FIG. 5, the auxiliary clamps 3 a and 3 b are provided on the inner side in the width direction Y than the conveyor belt 202. As shown in the side view of FIG. 6, the auxiliary clamps 3 a and 3 b have a fixing portion 31 fixed to the packaging machine body and a contact portion 32 that moves up and down by a driving device such as a solenoid. After the film F is conveyed between the fixed portion 31 and the contact portion 32, the contact portion 32 rises from the open level L1 to the close level L2 at a predetermined timing, so that the film F is directly sandwiched and clamped. Do.
On the other hand, as will be described later, the auxiliary clamps 3a and 3b constitute “damping means” that blocks a part of the film F in the film removal mode.
[0018]
Opening and closing doors 1a and 1b are provided at the upper portions on both sides of the main body cover 1 shown in FIG. As shown in FIG. 4, the open / close doors 1a and 1b are provided so as to be openable and closable on both sides of the film F in the transport direction X by, for example, hinges.
[0019]
The system is provided with a touch screen 10 (FIG. 1). An error display screen shown in FIG. 7 is displayed on the touch screen 10. The error display screen displays the contents of the error and the like, and a return button 10a described later.
This system has a control device (not shown) for controlling each device, and the control device has a packaging mode for packaging products and attaching labels, and a film removal mode to be described later. .
[0020]
Packaging mode:
The operator performs a predetermined operation, sets the system to the packaging mode, and starts the packaging mode.
When the product M is placed on the supply device 20 of FIG. 2 in the packaging mode, the product M is conveyed onto the lifter 201. On the other hand, the film F is drawn out from the film roll Fr shown in FIG. 4, and the film F is supplied by the transfer means 5 toward the packaging station S by the conveying belt 202 and is cut into a predetermined length by the cutting device 6. The When the film F is clamped by the main clamp 4 and the auxiliary clamps 3a and 3b and stretched on the packaging station S, the product M is pushed up by the lifter 201, and the product M is packaged.
[0021]
Film removal mode:
By the way, when the conveyance belt 202 fails to convey the film in the packaging mode, the packaging operation is stopped in a state where, for example, the wrinkled film F is supplied to the packaging station S, and the touch screen is stopped. 10 displays the error display screen shown in FIG. When the operator removes the film from the packaging machine and then touches the return button 10a displayed on the touch screen 10, the film removal mode starts.
[0022]
Here, the film F can be supplied from either of the left and right film rolls Fr. However, in the following description, for the convenience of description, the transfer of the film F in the right direction shown in FIG. This transfer is called “reverse feed”. 8 and 9, when the auxiliary clamps 3a and 3b are closed, the closed auxiliary clamps are displayed in black.
[0023]
When the film removal mode is started, the film F in FIG. 8A is slightly forwarded by the transport belt 202, and the film F is transported to the position shown in FIG. 8B.
[0024]
After the transfer, the contact portion 32 (FIG. 6) of the first auxiliary clamp 3a shown in FIG. 8 (c) is raised to the closing level L2, and the first auxiliary clamp 3a is closed. Thereafter, when the film F is fed back, the left end portion of the film F comes into contact with the first auxiliary clamp 3a to be dammed, and the film F is curled in front of the first auxiliary clamp 3a, as shown in FIG. The collar Fb shown is produced. On the other hand, at both ends in the width direction Y of the film F, portions (hereinafter referred to as “ear portions”) Fs that are not dammed are generated at portions outside the first auxiliary clamp 3a.
[0025]
After the damming, the first auxiliary clamp 3a is opened, and the film F is slightly reversely fed as shown in FIG. 9 (a). After the reverse feeding, the first auxiliary clamp 3a shown in FIG. 9B is closed, the right end portion of the film F is clamped, and then the film F is fed forward, the ear portion FS is transferred toward the flange portion Fb. And are collected into the flange portion Fb. Thereafter, as shown in FIG. 9C, the first auxiliary clamp 3a is opened. After the opening, the operator opens the open / close door 1a shown in FIG. 4 and grasps the rod-shaped flange portion Fb to remove the film F at the completion signal.
[0026]
In this way, the conveyor belt 202 is driven in a state in which a part of the film F in the conveyance direction X is blocked, and the film F is shrunk so that a large number of wrinkles are approached, and the door 1a is opened to be shrunk. Since the film F is taken out, the film can be removed easily, easily and quickly. Therefore, the operating rate of the system is also improved.
Further, by using the existing auxiliary clamps 3a and 3b as the damming means, it is possible to suppress an increase in cost.
[0027]
In the embodiment, the film F is contracted by contacting the left first auxiliary clamp 3a. However, the film F may be contracted by contacting the right second auxiliary clamp 3b. Alternatively, the film F may be shortened by selecting one of the auxiliary clamps 3a and 3b.
[0028]
As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the present invention can also be applied to a packaging machine using a single film roll (see JP-A-9-95323). Further, the present invention can also be applied to a packaging machine in which a film is stretched in the width direction of the film (pre-stretch) to change the film width and a large tray is packaged with a narrow film.
Furthermore, any packaging machine that wraps a product using a film may be used, and it is not necessary to have a weighing function of the product M and a label pasting function.
Also, it is not necessary to a rod shortens the film, and wrinkles in the film, may be easily removed form.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the size of the film by driving the conveyor belt in a state in which a part of the film is damped to reduce the size of the film by bringing a large number of wrinkles to the film. Work becomes simple and easy.
[0030]
Further, without changing the mechanical structure of the packaging machine of traditional, it is possible to realize a mechanism for only the film removing changing software.
[0031]
Further, if the film is contracted at the end in the film conveyance direction and the film is removed from the opening / closing door, the film can be removed without inserting a hand from the product outlet.
[0032]
In addition, if the film is reciprocated in the transport direction, the film can be shrunk until it becomes a rod shape, which makes it easier to take out.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a packaging sticking system showing an embodiment of the present invention.
FIG. 2 is a schematic side view showing a packaging mechanism.
FIG. 3 is a perspective view showing a film folding operation.
FIG. 4 is a front sectional view showing a film supply mechanism.
FIG. 5 is a plan sectional view showing a film supply mechanism.
FIG. 6 is a side cross-sectional view showing a film supply mechanism.
FIG. 7 is a chart showing a display screen.
FIG. 8 is a schematic plan view showing a film removal method.
FIG. 9 is a schematic plan view showing a film removal method.
[Explanation of symbols]
1a, 1b: Opening / closing door 202: Conveying belt 208: Elevator mechanism (elevating means)
3a, 3b: Auxiliary clamp (damping means, clamping means)
F: Film Fr: Film roll S: Packaging station (packaging part)
T: Tray (package)
Y: width direction X: transport direction

Claims (2)

The film is pulled out from the film roll, and both side edges in the width direction of the film are sandwiched between a pair of transport belts and transported to the packaging unit, and the film transported to the packaging unit is arranged in the width direction inside the transport belt or Stretch film packaging that clamps on the outside by clamping means, pushes up the package from the lower side of the film by an elevator mechanism, covers the top surface of the package with a film, and folds the end of the film into the bottom surface of the package Machine,
A packaging mode for packaging the article to be packaged with a film;
In order to remove the film from the packaging unit, a film removal mode is provided in which a wrinkle is drawn on the film to shrink the film in the transport direction, and
In the packaging mode, the clamping means clamps the film,
Apply tension to the film of the packaging part,
In the film removal mode, the clamp means is closed so that a part of the film is not transported in the transport direction of the film transported to the packaging unit or in the opposite direction, and the part is blocked without being transported. The stretch film packaging machine, wherein the transport belt is driven so that the film is transported toward the dammed portion in the packaging section. 2. The film removal mode according to claim 1, wherein in order to remove the film from the wrapping portion, the conveying belt is reciprocated with the clamp means closed and the film is damped to bring the wrinkles to the film. A stretch film wrapping machine that shrinks a film in a conveyance direction.

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