JP2000016403A - Stretch-wrap packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of a shift in position of an article due to activation of a folding plate and stick a label to a predetermined position by inhibiting folding operation at the time of executing of a weighing and labeling mode and also by correcting a labeling position by an article position detection camera. SOLUTION: When a non-packaging mode such as a weighing and labeling mode is selected, after an article X which has been packaged in advance is mounted on a weighing carry-in device 2, its weight is measured and also a position of the article X is detected by an article position detection camera 50, and the article is pushed up to a packaging part A by a lift 3. In this case, left and right folding plates 4, 5 and a rear folding plate 6 do not activate, the article X is discharged onto a heat seal 7, and a label L is stuck by a label printer 9. At this time, the label printer 9 moves back and forth and left and right based on a detection signal by the article position detection camera 50, whereby the label L can be correctly stuck to a predetermined position on the article X.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretch wrapping machine, and more particularly to a wrapping mode for wrapping a product with a stretch film, weighing the product, and printing predetermined information derived based on the weighed value. The present invention relates to a stretch packaging machine having a weighing labeling mode in which a label is issued by a labeling device and attached to the product, and belongs to the field of packaging technology.

[0002]

2. Description of the Related Art In general, a stretch wrapping machine for wrapping a product such as a fresh food product for a supermarket stored in a styrofoam tray with a stretch film together with the tray is disclosed in, for example, JP-A-8-15109. Then, the product is pressed together with the tray by a lifting device from below the film cut to a predetermined size according to the size of the product and held tightly on the packaging part, and in this state, the left and right folding plates adhere to the upper surface of the product The left and right side edges of the film are folded toward the bottom side, the rear side edge of the film is folded into the bottom side of the tray by the rear folding plate, and then pushed out by the discharge member to the front discharge section and discharged. By doing so, the front side edge of the film is folded into the bottom side of the product and packaged.

In this case, the lift device includes a plurality of lift posts fixed on a base, and a lift head rotatably supported at an upper end of each lift post and receiving a bottom surface of the product. Each folding plate enters the bottom surface side of the product while tilting its lift head.

Further, such a stretch wrapping machine includes:
In the middle of the product transport route, there is a weighing device that measures the weight of the product, and a label printer that affixes a label printed with the price and product name of the product calculated from the weight. As the operation mode of the type of stretch wrapping machine, after measuring the weight of the product with a weighing machine, wrapping the product, and then attaching the label with the above label printer, weighing and packaging labeling mode, or only packaging of the product Packaging mode, or
For example, a weighing labeling mode or the like in which only the weight of a product that is already packaged before the product is carried into the packaging machine and the label is attached by a label printer is set.

[0005]

As described above, the operation modes of the stretch packaging machine are roughly classified into a packaging mode such as a weighing and packaging labeling mode and a packaging mode, and a non-wrapping mode such as a weighing and labeling mode. You.

By the way, conventionally, even when such a non-wrapping mode is selected, the left and right folding plates and the rear folding plate are operated idle without the film being prepared in the packaging portion. However, the following problems have occurred.

That is, as shown in FIG. 8, the film F 'is folded on the bottom surface of the packaged product X'. There is an overlapping portion where the film F 'overlaps, or a sealed portion that is heat-sealed, and these portions are uneven. When each folding plate inclines the lift head when entering, the lift head rubs against the bottom surface of the product such that the lift head comes into contact with the uneven portion, and the left and right folding plate and the rear folding plate are directly The position of the product X 'is shifted in the left-right direction or the front-rear direction due to contact with the uneven portion, and as a result, as shown in FIG. Shift or, the attachment position is to arise problems such as or different for each product.

In view of the above, the present invention provides a stretch wrapping machine in which a non-wrapping mode such as a weighing labeling mode in which only weighing of goods and sticking of a label is selected is used. It is an object of the present invention to provide a stretch wrapping machine capable of preventing a product from being displaced due to the operation of (1) and accurately applying a label to a predetermined position.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is characterized by the following constitution.

First, the invention according to claim 1 of the present application (hereinafter, referred to as the invention)
The "first invention") is a packaging mode in which goods are wrapped with a stretch film, and weighs the goods, and issues a label on which predetermined information derived based on the weighed value is printed by a labeling device. And a weighing labeling mode in which the wrapping mode is realized by the operation of a folding device that folds the front and rear and left and right sides of the stretch film toward the bottom side of the product. Control means for prohibiting the folding operation of the folding device at the time of executing.

In the invention according to claim 2 of the present application (hereinafter, referred to as "second invention"), in the first invention, the folding device comprises a left-right folding member, a rear folding member, and a front side of the film. The control means prohibits the folding operation of at least one of the left and right folding members and the rear folding member.

Further, the invention according to claim 3 of the present application (hereinafter referred to as “the invention”)
The “third invention”) is the first invention, wherein the commodity position detecting means for detecting the position of the commodity at the time of supplying the commodity to the packaging machine; And a labeling position changing means for changing a labeling position by the labeling device.

According to the first to third aspects, the following operation can be obtained.

First, according to the stretch packaging machine of the first invention, since the control means for inhibiting the folding operation of the folding device when the measuring labeling mode is executed is provided, the folding device is folded when the measuring labeling mode is executed. It is possible to avoid a problem that a displacement of the product occurs due to the operation.

According to the stretch wrapping machine of the second invention, the folding device is composed of a left and right folding member, a rear folding member, and a discharge member for folding the front side of the film to the bottom side of the product. Since the control means inhibits the folding operation of at least one of the left and right folding members or the rear folding member, the misalignment of the product is caused by the folding operation of at least one of the left and right folding members or the rear folding member during the execution of the weighing labeling mode. Can be avoided.

Further, according to the stretch packaging machine of the third invention, a commodity position detecting means for detecting a position of the commodity at the time of supplying the commodity to the packaging machine, and a position corresponding to the position of the commodity detected by the detecting means. Labeling position changing means for changing the labeling position by the labeling device, the position of the product detected by the product position detecting means at the time of supply of the product to the packaging machine is shifted by the folding operation of the folding device, It is possible to avoid a problem that the detection of the position of the product by the detection means is useless, and to perform labeling according to the position detected by the detection means.

[0017]

Embodiments of the present invention will be described below.

First, based on the front view of FIG. 1 and the enlarged sectional views of FIGS. 2 and 3, the overall configuration of the stretch wrapping machine 1 according to this embodiment will be described along the moving path of the product X. The packaging machine 1 is provided with a weigh-in / carry-in device 2 through an opening 1b provided in the center of the front of the main body 1a, and the product X is first placed on the weigh-in / carry-in device 2. Is weighed and then carried into the main body 1a. A lift device 3 having a plurality of lift posts 3a... 3a and lift heads 3b... 3b rotatably mounted on the upper end thereof is disposed at the end of the carry-in device 2. The goods X carried into the inside of the device are transferred from the carry-in device 2 to the lift heads 3b... 3b of the lift device 3, and then driven by the lift device lifting drive motor M ₁ (see FIG. 4). The lift device 3 rises and is pushed upward. The upper area of the lift device 3 is a packaging section A, where the vertical of the product X is placed.
The stretch film F cut in accordance with the width and height dimensions is particularly horizontal as shown by a chain line in FIG. 3 with the front and rear side edges held by film holding devices 21 and 22 described later. Has been expanded to. The product X pushed upward by the lift device 3 is also pushed into the substantially central portion of the film F, as shown in particular by a solid line in FIG. When the film F is elevated to a predetermined height while being stretched, the operation is stopped.

As shown by arrows a, b, and c, a left and right folding plate drive motor M ₂ and a rear folding plate drive motor M ₃ (see FIG. 4) are provided on the left, right, and rear of the raised product X. A pair of left and right folding plates 4 and 5 and a rear folding plate 6 which advance and retreat toward the bottom surface of X are arranged, and these folding plates 4, 5 and 6 respectively enter the film F which has been elongated by the rise of the product X. Thus, the left and right side edges and the rear side edge of the film F are folded and adhered to the bottom surface of the product X. Above the weigh-in / carry-in device 2, a heat sealing device 7 is provided.
It is driven by the discharge pusher drive motor M ₄ (see FIG. 4) and is pushed by the discharge pusher 8 which advances forward with a delay to the rear folding plate 6, and is discharged onto the heat sealing device 7. The label L issued based on the weighed value is placed on the film F on the upper surface of the product X by the label printer 9.
And the front side edge of the film F is folded and adhered to the bottom side of the product X. Then, each side edge of the film F is heat-sealed by the heat sealing device 7, and the packaging of the product X by the stretch film F is completed here.

Next, based on FIGS. 1 to 3, the general structure of each device for transporting the film F to the packaging portion A and holding the film F in the packaging portion A will be described along the transport route of the film F. explain.

First, a film F unwound from a film roll R rotatably housed inside the right side of the main body 1a.
Is guided toward the center of the main body by the plurality of rollers 11 to 13. As shown in FIG. 2, a transport unit 15 in which a roller 12 and a conveyor 14 disposed at the tip of the roller 12 are unitized is swingable around a support shaft of the roller 12. When the film 15 descends as shown by the solid line in the figure, the film F is further fed out toward the center of the main body. Further, the film F is cut into a predetermined size by a cutter device 16 provided between the rollers 11 and 13.

Next, the film F having the predetermined size is transferred to a pair of front and rear holding devices 21 and 22 provided on the front wall 1c and the rear wall 1d of the main body 1a. These holding devices 21 and 22 have substantially the same configuration, and a plurality of frames 23 to 25 support an upper conveyor 26 and a lower conveyor 27 extending horizontally, respectively.

The conveyors 26 and 27 have transport belts 28 and 29, respectively. The lower surface of the transport belt 28 in the upper transport mechanism 26 and the upper surface of the transport belt 29 in the lower transport mechanism 27 are in contact with each other. Traveling in the same direction at the same speed, and a plurality of clampers 30, 31a, 31
a and 31b constitute a clamping mechanism, and the film F cut to a predetermined size is expanded horizontally.
The front and rear side edges are sandwiched between the confronting surfaces of the transport belts 28 and 29, and are transported to the packaging unit A by the travel of the transport belts 28 and 29.

The front wall 1c and the rear wall 1d of the main body 1a
The plungers protrude and retract by turning on and off the solenoids 32a and 32b, the plungers of which are oriented toward the walls 1c and 1d, and hold the conveying belts 28 and 29 together by swinging the lever members 32c and 32d. The cancellation has been done.

Further, as shown in FIG. 3, the upper surfaces of the cylindrical suction heads 33 extending horizontally adjacent to the frame 25 are provided on the holding devices 21 and 22 with the transfer belts 28 and 22, respectively.
The film F, which is positioned at substantially the same height as the contact surfaces of the suction heads 29 and whose side edges are sandwiched by the conveyor belts 28 and 29, is placed in contact with the upper surface of the suction head 33 and has an upper surface. A large number of holes 34 are formed so that the front and rear side edges of the film F are suctioned to the upper surface of the suction head 33 by the negative pressure in the suction head 33 generated through the pipe 35. Has become.

The packaging machine 1 includes the lift device 3, the folding plates 4, 5, 6, the discharge pusher 8, the transport mechanisms 26, 27 and the solenoids 32a, 32b in the film holding devices 21, 22, and the suction head. A control unit 41 for controlling operations such as a vacuum pump (not shown) for generating a negative pressure in the inside 33 is built in the operation unit B (see FIG. 1).

When the product X is placed on the weigh-in / carry-in device 2 and a signal indicating that the weighed value is stabilized is input to the control unit 41, a carry-in signal is output from the unit 41 to the carry-in device 2; As a result, the product X is delivered to the lift device 3 and a weighing value signal is output to the label printer 9 to prepare for issuance of a label on which a net amount, a selling price, and the like are printed. Further, the rollers 11 to 13, the transport unit 15, and the cutter device 16
Is driven, and the stretch film F having a predetermined size is transferred to the holding devices 21 and 22. Holding devices 21 and 22
Means that the film F is transported in a state where the solenoids 32a and 32b and the vacuum pump are all off.
To the packaging section A at the center of the main body.

In this embodiment, a product position detecting camera 5 for detecting the position of the product X when the product X is supplied onto the carry-in device is provided on the lower surface of the heat sealing device 7.
0 is provided, and the label printer 9 is
And it is movable in the longitudinal and lateral directions by the driving motor M ₅ label printer. Then, the detection signal of the detection camera 50 is sent to the control unit 41, the control unit 41 based on the detection signal by driving the driving motor M ₅ label printers, the products detected in the detection camera 50 The label printer 9 is moved according to the position.

After measuring the weight of the product, the product X is wrapped, and then the label L is
And a weighing / labeling mode in which only the product X is wrapped, and a weighing / labeling mode in which only the weight of the product is weighed and the label L is attached by the label printer 9 are set. The mode can be switched by operating the operation unit B. As shown in FIG. 4, the control unit 41 includes a lifting device elevating drive motor M ₁ , a left and right folding plate drive motor M ₂ , a rear folding plate drive motor M ₃ , a discharge pusher drive motor M ₄ , the label printer 9 and a label printer for driving motor M _6, and is adapted to operate at a predetermined timing corresponding to each mode.

Here, the operation of the stretch packaging machine 1 when the weighing labeling mode, which is a feature of the present embodiment, is selected will be described. When this mode is selected, in many cases, the product X is already wrapped before being carried into the packaging machine. In this embodiment, it is assumed that the product X is already wrapped.

First, when the weighing labeling mode is selected by operating the operation unit B and the product X is placed on the weighing-in / carrying-in device 2, the weight of the product X is measured and the product X is detected by the product position detection camera 50. The position is detected and the main body 1a is detected.
The product X is carried into the inside of the inside. Then, the product X is delivered from the loading device 2 to the lift device 3, and the product X is pushed up to the packaging unit A by the lift device 3.

In this embodiment, even if the product X on the lifting device 3 is conveyed to the packaging section A, the left and right folding plates 4 and 5 and the rear folding plate 6 do not operate, and the discharge pusher 8 is While discharging X onto the heat sealing device 7,
The label printer 9 sticks the label L on the film F on the upper surface of the product X.

In that case, the control unit 41
But it receives a detection signal related to the product position detected by the detection camera 50, by driving the driving motor M ₅ for label printer based on the detection signal, the label L by moving the label printer 9 in the longitudinal and lateral directions paste.

For example, as shown in FIG. 5, it is assumed that the previous product is discharged to the position indicated by the dotted line, and the label L is attached by the label printer 9 at that position, and the current product X is positioned at the position indicated by the solid line. The label printer 9 moves in the direction of arrow A from the previous pasting position so that the label L can be pasted to a predetermined position on the current product X as well, and the label printer 9 pastes the label L. .

In this mode, the heat sealing device 7 does not operate, and the weighing and labeling of the product X ends here.

As a result, conventionally, as shown in FIGS. 6 and 7, the left and right folding plates and the rear folding plate are idled, and the folding plates 4, 5, and 6 are lifted by the lift head 3b.
3b is tilted down and the film F is folded into the bottom side of the product X.
The lift heads 3b... 3b are in contact with the wrinkles of the film F, which are generated in advance on the bottom surface side of the product X, the overlapping portion where the folded film F overlaps, or the uneven portion such as the heat-sealed seal portion. The bottom surface of the product X was rubbed, or the left and right folding plates 4 and 5 and the rear folding plate 6 were directly in contact with the concave and convex portions. But,
With such a configuration, such a problem can be solved.

Therefore, despite the fact that the position of the product X when it is carried into the packaging machine 1 is detected by the product position detection camera 50, the product X detected by the operation of the folding plates 4, 5, and 6 is detected. The problem that the position is shifted and the label L cannot be stuck at the predetermined position can be solved, and the label L can be stuck based on the position of the product X detected by the product position detection camera 50.

Further, since the left and right folding plates 4 and 5 and the rear folding plate 6 are not operated, the quietness of the packaging machine 1 when the weighing labeling mode is selected is greatly improved, and the lift heads 3b. Since the left and right folding plates 4 and 5 and the rear folding plate 6 do not abut on the lift head 3b, the lift head 3b is not damaged.
... The durability of 3b is greatly improved.

In this embodiment, none of the left and right folding plates 4, 5 and the rear folding plate 6 are operated, but only one of them may not be operated.

In the present embodiment, the detection camera 50 is provided to detect the position of the product X. However, an article sensor is provided instead of the detection camera 50, and the position of the product X is detected by the sensor. You may make it detect.

Further, in this embodiment, the label L is moved by moving the printer 9 back and forth and left and right.
Is adjusted in the front-rear and left-right directions. Instead, the printer 9 is moved only in the left-right direction to adjust the left-right sticking position of the label L. The position of the label L in the front-rear direction may be adjusted by adjusting the timing at which the label L arrives directly below the printer 9.

[0042]

First, according to the stretch packaging machine of the first invention, since the control means for inhibiting the folding operation of the folding device during the execution of the weighing labeling mode is provided, the folding device at the time of the execution of the weighing labeling mode is provided. It is possible to avoid the problem that the product is displaced due to the folding operation.

According to the stretch wrapping machine of the second invention, the folding device is composed of the left and right folding members, the rear folding member, and the discharging member for folding the front side of the film to the bottom side of the product. Since the control means inhibits the folding operation of at least one of the left and right folding members or the rear folding member, the misalignment of the product is caused by the folding operation of at least one of the left and right folding members or the rear folding member during the execution of the weighing labeling mode. Can be avoided.

According to the stretch wrapping machine of the third invention, the product position detecting means for detecting the position of the product at the time of supplying the product to the wrapping machine; Labeling position changing means for changing the labeling position by the labeling device, the position of the product detected by the product position detecting means at the time of supply of the product to the packaging machine is shifted by the folding operation of the folding device, It is possible to avoid a problem that the detection of the position of the product by the detection means is useless, and to perform labeling according to the position detected by the detection means.

[Brief description of the drawings]

FIG. 1 is a front view of a stretch packaging machine according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the stretch wrapping machine from the front side.

FIG. 3 is a view taken along an arrow line in FIG. 2;

FIG. 4 is a control system diagram of a control unit.

FIG. 5 is a plan view showing one operation of the label printer.

FIG. 6 is a front view showing a conventional problem.

FIG. 7 is a front view showing a conventional problem.

FIG. 8 is a perspective view of the packaged product viewed from the bottom side.

FIG. 9 is a perspective view showing a conventional problem.

[Description of Signs] 1 Stretch wrapping machine 2 Weigh-in / carry-out device 3 Lift device 4 Left folding plate 5 Right folding plate 6 Rear folding plate 8 Discharge pusher 9 Label printer 41 Control unit 50 Product position detection camera M ₂ Drive motor for left / right folding plate M ₃ back folding plates driving motor M ₅ label printer drive motor L label

Claims (3)

[Claims] 1. A packaging mode for wrapping a product with a stretch film, weighing the product, issuing a label on which predetermined information derived based on the weighed value is printed by a labeling device, and applying the label to the product. A stretch labeling mode, wherein the packaging mode is realized by the operation of a folding device that folds the front, rear, left, and right sides of the stretch film toward the bottom surface of the product, and executes the measurement labeling mode. A stretch wrapping machine characterized by being provided with control means for prohibiting the folding operation of the folding device from time to time. 2. The folding device includes a left and right folding member, a rear folding member, and a discharge member for folding the front side of the film to the bottom side of the product.
The stretch wrapping machine according to claim 1, wherein a folding operation of at least one of the left and right folding members or the rear folding member is prohibited. 3. A product position detecting means for detecting a position of a product when the product is supplied to the packaging machine, and a labeling device for changing a labeling position by the labeling device in accordance with the position of the product detected by the detecting means. The stretch wrapping machine according to claim 1, further comprising a position changing means.