JP2002120804A - Packaging method for bread - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging method for bread wherein a packaging bag with bread received can be continuously and efficiently sealed and wherein a mouth can be simply closed while no burden is imposed on the packaging bag. SOLUTION: The packaging method for bread comprises processes of spreading wrinkles of a mouth 61 of a packaging bag 6 with the bread received by blowing air to expand the mouth, crushing the mouth having the wrinkles spread into a vertically flat state by pressing the bag from upward and downward, discharging excessive air in the bag by closing the bag with edges of the bread pressed from upward and downward and sealing the vertically flat squashed mouth 61 by heating the bag while moving it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for packaging bread, and more particularly, to a method for packaging bread, wherein the packaging bag containing the bread in a bag body is continuously and efficiently sealed. On how to do it.

[0002]

2. Description of the Related Art Edible bread such as bread and confectionery bread is manufactured and commercialized, and is finally displayed as it is at a store or stored in a predetermined container and displayed in a packaged state. . At present, except for bread baked at the store from the viewpoint of hygiene, it is usually packed and arranged at the store. However, in order to avoid problems such as mixing of foreign matter even in the packaged state, the package is sold in a packaging container so that a third party cannot mix foreign matter and sealed so as not to be easily opened.

[0003] As a package used as a packaging container, for example, a thin bag obtained by partially welding a plastic film is mainly used. When such a bag is used, since the bag is a thin and flexible film, wrinkles are likely to occur when sealing. For this reason, wrinkling of the mouth is performed at a stage before the sealing.

[0004] A brief description will be given of a conventional bag sealing method employing the wrinkle growth. First, air is blown into the mouth of a packaging bag in which bread is put, so as to smooth wrinkles around the mouth. With the wrinkles stretched, the two expansion bars are pushed into the packaging bag and expanded to close the mouth of the packaging bag. Thereafter, the air is released by the press-down bar, and finally, the heater bar is pressed and welded from above and below for welding.

[0005] Although the sealing method as described above has been performed, in this case, although the sealing can be performed by continuously flowing the packaging bag, the movement of the extension bar 100 is controlled by the movement of the packaging bag as shown in FIG. Together, and "forward" [Fig.
(A)] and "extend" (FIG. 10B), that is, so-called box motion must be performed. For this reason, a complicated drive mechanism is required for the extension bar 100, which is liable to cause a failure and disadvantageous in terms of cost.

On the other hand, since the operation of expanding the mouth portion of the packaging bag with the two extension bars 100 is performed, stress is concentrated at the contact position between the extension bar 100 and the mouth portion, and the bag itself may be damaged. is there. Also, in the sealing method, since the bag body from above and below is pressed and sealed using a heater bar, it is necessary to perform a box motion on the heater bar itself in order to perform continuous sealing.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to solve those problems. That is, an object of the present invention is to provide a bread packaging method in which the packaging bag containing the bread is continuously and efficiently sealed. Another object of the present invention is to provide a bread wrapping method in which the mouth can be easily closed and a load is not placed on a packaging bag.

[0008]

Means for Solving the Problems Thus, the present inventor has:
As a result of intensive studies on the background of such problems, when closing the mouth of the packaging bag, it is necessary to use an endless conveyor to gradually expand the bag without using an expansion bar, and eliminate the need for a complicated drive mechanism. The present invention has been completed based on the findings described above.

That is, the present invention relates to (1) a method of packing bread, wherein the step of stretching wrinkles at the mouth of the packaging bag containing the bread is carried out so that the stretched mouth is vertically and horizontally. There is a method for packaging bread comprising a crushing step, a step of discharging excess air in a packaging bag, and a step of sealing a mouth portion crushed vertically and horizontally.

[0010] (2) A method of packing bread, in which air is blown to widen the mouth to smooth wrinkles in the mouth of the packaging bag in which the bread is stored. A step of crushing the creased mouth vertically and horizontally, a step of discharging the excess air in the packaging bag by pressing and closing the side of the bread from above and below, and heating and moving it to a vertical and horizontal state A method for packaging bread comprising the step of sealing a crushed mouth.

Further, (3) a method for packaging bread in which the above-described steps are performed while moving while the packaging bag is placed on the transport conveyor in a direction perpendicular to the moving direction.

(4) In the step of expanding wrinkles at the mouth of the packaging bag containing the bread by blowing air to widen the mouth, weak air is blown first.
Then there is the method of packaging bread that blows strong air.

(5) In the step of crushing the creased mouth in a vertical and horizontal state, the mouth is closed by using a pair of upper and lower crushing conveyors in which the distance between the conveyors gradually decreases and becomes constant. The present invention resides in a method of packaging bread that is crushed vertically and horizontally.

Further, (6) in the step of discharging excess air from the packaging bag, there is a method of packaging bread that is closed by being pressed down from above and below by a pair of upper and lower guide bars.

Further, (7) in the step of sealing the mouth portion crushed in a horizontal state, there is a method of packing a bread to be sealed by gripping and moving the pair of heated upper and lower sealing conveyors.

Also, (8) a method of packing bread, in which air is blown from an air nozzle to widen the mouth to reduce wrinkles at the mouth of the packaging bag containing the bread, A step of crushing the creased mouth by pressing the mouth using a pair of upper and lower crushing conveyors in which the interval between the conveyors gradually decreases and becomes constant,
A process in which excess air in the packaging bag is discharged by pressing and closing the front of the pan with a pair of upper and lower guide bars, and a mouth crushed in a vertical state by being gripped and moved by a pair of heated upper and lower sealing conveyors And a method of packaging bread comprising the steps of:

According to the present invention, there is provided a bread packaging method in which the packaging bag containing the bread is continuously and efficiently sealed. Further, the present invention is a bread packaging method that can easily close the mouth and does not put a burden on the packaging bag. The present invention can effectively adopt a configuration in which two or more selected from the above (2) to (7) are combined as long as the object is met.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a bread packaging method according to the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a block diagram showing the steps of the packaging method of the present invention. 3 to 7 show steps for packaging the bread of the present invention. Hereinafter, in the present invention, bread is described as an example of bread, but the bread is not limited thereto. Fig. 3 shows the process of extending wrinkles in the mouth (pre-blowing)
FIG. 4 shows a process of stretching wrinkles in the mouth (main blowing).
FIG. FIG. 5 is a schematic diagram showing a step of crushing the creased mouth to a substantially closed state. FIG. 6 is a schematic view showing a step of discharging excess air from the packaging bag. FIG. 7 shows the step of sealing the closed mouth.

First, before reaching FIG. 3, the produced bread is stored in a bag, which is performed by a usual bread filling device (not shown). As shown in FIG. 2, the packaging bag 6 in which the bread is stored (packed) in the bag body by the bread filling device is almost wrinkled and the mouth 61 is open. It is.

The packaging bag 6 containing the bread in the previous step is
The package is transported while being placed on the conveyor 1, and in this case, the packaging bag 6 is placed in a direction perpendicular to the moving direction of the conveyor 1. The mounting area is defined by attaching the flight 11 to the transport conveyor.

[Step of Flattening Wrinkles at the Mouth of Wrapping Bag (Wrinkling Flattening Step)] As described above, in a state where bread is stored in the packing bag, wrinkles are formed at the mouth 61. It is necessary to extend and eliminate these wrinkles so that an accurate seal can be obtained when sealing. In this step, the wrinkles of the mouth 61 are stretched and erased for that purpose.
As shown in FIGS. 3 and 4, air is blown into the opening 62 of the packaging bag placed on the moving conveyor 1. That is, air is blown from the air nozzle 2 arranged toward the transport conveyor 1 in a direction perpendicular to the moving direction of the transport conveyor 1. Since the bottom of the packaging bag 6 is closed, when air is blown from the opening 62 of the mouth, the pressure causes the mouth 61 to be greatly expanded and the wrinkles to be extended.

Here, as shown in FIG. 3, the air is blown at first by using the first air nozzle 2A and slightly weaker air close to a breeze (pre-blow). The reason is that if strong air is blown into the mouth 61 suddenly, the whole mouth may be bent, and air is reliably blown into the mouth 61 by a weak air pressure so as not to cause such a case.

Next, as shown in FIG. 4, relatively strong air is blown using the second air nozzle 2B (main blowing). Since the blowing of weak air is already started by the pre-blowing and the mouth 61 is considerably opened, strong air is blown into the mouth 61 without fail to bend the entire mouth, and the mouth 61 is greatly expanded. At this point, the wrinkles around the mouth 61 are completely eliminated.

[Step of crushing the creased mouth to a substantially closed state (crushing step)] This step is to facilitate sealing when finally sealing, that is, to perform sealing efficiently and accurately. This is to make the upper and lower surfaces horizontal. The mouth portion 61 of the packaging bag placed on the moving conveyor 1 is gradually crushed so that the upper and lower surfaces are substantially closed (ie, the upper and lower surfaces are horizontal).

In this case, as shown in FIG. 5, as a means for crushing the mouth 61, a pair of upper and lower endless crushing conveyors 3 in a positional relationship such that the distance between the crushing conveyors gradually decreases and thereafter becomes constant. (3A, 3B) is used. That is, the crushing conveyors 3 are arranged in a pair at the top and bottom along the end of the transport conveyor 1, and the interval between the crushing conveyors 3 is initially wide and gradually narrow, and finally becomes constant. Therefore, when the mouth 61 of the packaging bag that moves together with the conveyor 1 is located between the upper and lower crushing conveyors 3A and 3B, the mouth 61 is squeezed by the crushing conveyors 3A and 3B without applying excessive force to the mouth 61. It is gradually suppressed.

By synchronizing the conveying conveyor 1 and the crushing conveyor 3, the opening 61 of the packaging bag whose wrinkles have been stretched in the previous process is properly crushed and closed while the upper and lower surfaces are horizontal. As described above, the means for crushing the mouth portion 61 is simply provided with a pair of upper and lower crushing conveyors 3A and 3B having different intervals at the end of the conveyor 1, so that the box motion of the expansion bar 100 as in the related art is used. Do not need any. For this reason, since an unreasonable force for supporting and expanding the mouth at the two points by the extension bar 100 is not applied, the packaging bag is smoothly and horizontally closed. Here, the crushing by the crushing conveyor 3 in the up and down horizontal state is not necessary until the upper and lower portions of the mouth portion 61 are closed, and the excess air in the packaging bag is discharged next, so that the air can escape. A gap is needed.

[Step of Evacuating Excess Air in the Packaging Bag (Air Evacuation Step)] After the mouth portion 61 is crushed in the previous step, excess air is generated between the crushed portion and immediately before the bread. It is present, and if it is sealed as it is, the fit property in the bread packaging bag is deteriorated, and the dub of the bag is not preferable as a product. For this reason, in this step, extra air remaining in the bag is exhausted before final sealing is performed.

The upper and lower surfaces of the mouth portion 61 whose wrinkles have been stretched by pressing the upper and lower sides in the previous step are substantially closed in a horizontal state. By pressing vertically before the position almost closed in the horizontal state, that is, immediately before the bread is closed from above and below, excess air existing in the mouth 61 is pushed out (discharged). As shown in FIG. 6, the air is discharged from the pair of upper and lower guide bars 4 (4A, 4A).
B).

The guide bars 4A, 4B are disposed between the pair of upper and lower crushing conveyors 3A, 3B and the conveyor 1 in the previous process. In this case, the guide bar 4
A and 4B are upper guide bar 4A or lower guide bar 4B.
A mechanism that moves only up and down, or a mechanism that moves both the upper and lower guide bars 4A and 4B up and down may be used. The figure shows a case where a mechanism for pressing down the upper guide bar 4A is employed. At this time, for example, when the upper guide bar 4A is pushed down and brought closer to the lower guide bar 4B, excess air in the mouth is pressed and the mouth 61 of the mouth 61 crushed by the pair of upper and lower crushing conveyors 3A and 3B is pressed. It is discharged outside through a small gap.

[Step of Sealing Closed Portion (Sealing Step)] This step is a step of finally closing the port portion 61 with a seal. The wrinkles of the mouth 61 are stretched in the two steps before, and the mouth 61 is crushed in the previous step so that the upper and lower surfaces are horizontal and substantially closed. The wrinkles of the portion 61 have been erased and are almost closed. The welded portion (seal portion 6A) is formed by heating and welding the mouth portion 61 in this state.

As shown in FIG. 7, the sealing conveyor 5 used here uses a pair of upper and lower endless heated sealing conveyors 5A and 5B, and grips and moves the mouth portion 61 between them. That is, the sealing conveyors 5A, 5B
A pair of upper and lower sealing conveyors 5A and 5B are respectively rotated and moved in a press-contact state along an end of the conveying conveyor 1 along an extension of the crushing conveyor 3. As a means for heating the sealing conveyor 5, a pair of opposed upper and lower heating plates 51 (51A, 51B) arranged inside the sealing conveyors 5A, 5B are used here.

The sealing by the sealing conveyor 5 is as follows.
In order to perform the action of rotating while holding the mouth 61 of the packaging bag from above and below, the heating time of the mouth 61 of the packaging bag can inevitably be long. That is, since this seal can be continuously heated by the sealing conveyor 5 synchronized with the transport conveyor 1, unlike the conventional method of pressing with a heating bar or the method of using a heating roller, a long heating time is required and compared. Sealing becomes possible at extremely low temperatures. Therefore, thermal efficiency is good and there is no failure such as fusing by heating. Thus, the sealing of the packaging bag 6 is completed.

As described above, the sealed packaging bags are bound as required (forming a bound portion 6B). FIG.
Indicates a packaging bag bound by using a binding tool. As shown in (A), there is a method of binding using a waist binding device K (here, a string), and as shown in (B), a method of binding using a binding device K (here, a plastic hook body). Due to this unity, the mouth 61 is constricted, so that the ends open in a flower shape, and the merchandise effect is enhanced.

FIG. 9 shows a positional relationship between the binding portion and the seal portion. (A) shows the case where the binding part 6B is inside (front of) the sealing part 6A, that is, immediately before the bread. (B) shows a case where the binding portion 6B is located at the position of the seal portion 6A. (C) shows the case where the binding part 6B is located outside the seal part 6A. The position of the binding portion 6B can be freely selected to be any of the above positions. In addition, in the case of (A), it is preferable to seal the seal portion 6A as far as possible from the bread, and in the case of (C), it is preferable to seal the seal portion 6A as much as possible.

Next, the packaging operation in the packaging method of the present invention will be described. First, the bag (packing bag 6) containing the bread is sent by the conveyor 1. The air blown out from the air nozzle 2 is blown into the mouth 61 of the packaging bag to eliminate (stretch) wrinkles around the mouth 61.

Next, while the packaging bag 6 is moved by the conveyor 1, the opening 61 of the bag 6 is moved by the pair of crushing conveyors 3.
Is gradually crushed. By pressing the guide bar 4 just before the bread, excess air remaining in the packaging bag is discharged from the mouth. After the excess air is extruded, the mouth 61 whose upper and lower surfaces are horizontal is passed between a pair of upper and lower sealing conveyors 5 and welded. Next, the part in front of the seal portion 6A is bound with the binding device K as necessary.

Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the object. For example, although the case where bread is packaged is shown, extremely different foods other than bread can be used.

[0038]

As described above, according to the present invention,
The packaging bag containing the bread is sealed continuously and efficiently. The step of crushing the mouth is performed by a simple mechanism in synchronization with the transport conveyor. When the mouth is sealed, a long heating time can be continuously taken in synchronization with the conveyor, so that the heating temperature may be low and the heat efficiency is good. Further, the packaging bag is not damaged because excessive stress is not applied to the packaging bag.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the steps of the packaging method of the present invention.

FIG. 2 is a diagram illustrating a bag (packaging bag) storing bread.

FIG. 3 is a schematic view showing a step (pre-blowing) of flattening a wrinkle of a mouth.

FIG. 4 is a process of stretching wrinkles in the mouth (main blowing).
FIG.

FIG. 5 is a schematic view showing a step of crushing the mouth to a substantially closed state.

FIG. 6 is a schematic view showing a step of discharging excess air in the packaging bag.

FIG. 7 is a schematic view showing a step of sealing the mouth.

FIG. 8 shows a packaging bag bound by using a binding device.

FIG. 9 shows each positional relationship between a binding portion and a seal portion.

FIG. 10 is a view showing the movement of an expansion bar in a conventional sealing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Conveying conveyor 11 ... Flight 2 ... Air nozzle 2A ... 1st air nozzle 2B ... 2nd air nozzle 3 ... Crushing conveyor 3A ... Upper crushing conveyor 3B ... Lower crushing conveyor 4 ... Guide bar 4A ... Upper guide bar 4B ... lower guide bar 5 ... sealing conveyor 5A ... upper sealing conveyor 5B ... lower sealing conveyor 51 ... heating plate 51A ... upper heating plate 51B ... lower heating plate 6 ... packaging bag 61 ... mouth 62 ... Opening 6A: Welding part (seal part) 6B: Binding part 100: Expansion bar K: Binding part

Claims (8)

[Claims] 1. A method for packaging bread, comprising: a step of flattening wrinkles at a mouth of a packaging bag containing bread; a step of crushing the stretched mouth vertically and horizontally; A method for discharging bread air, and a step of sealing a mouth crushed vertically and horizontally. 2. A method of packing bread, wherein the step of extending wrinkles at the mouth of the packaging bag containing the bread by blowing air to expand the mouth, and the step of pressing the wrinkles from above and below to reduce the wrinkles. Step of crushing the opened mouth vertically and horizontally, step of discharging excess air in the packaging bag by pressing down and closing the side of the bread from the top and bottom, mouth crushed vertically by heating while moving And packaging the bread. 3. The method of packaging bread according to claim 2, wherein each of the steps is performed while the packaging bag is moved while being placed on the transport conveyor in a direction perpendicular to the moving direction. 4. The process of blowing wrinkles at the mouth of a packaging bag containing bread by blowing air to widen the mouth, wherein weak air is blown first and then strong air is blown. Item 4. A method for packaging bread according to Item 2. 5. In the step of crushing the creased mouth in a vertical and horizontal state, the mouth is crushed in a vertical and horizontal state using a pair of upper and lower crushing conveyors in which the distance between the conveyors gradually decreases and becomes constant. The method of packaging bread according to claim 2, wherein the bread is packaged. 6. The method of packaging bread according to claim 2, wherein in the step of discharging excess air in the packaging bag, the pair of upper and lower guide bars is pressed down from above and closed. 7. The method for packaging bread according to claim 2, wherein in the step of sealing the mouth portion crushed in a horizontal state, the mouth is sealed by being gripped and moved by a pair of heated upper and lower sealing conveyors. . 8. A method of packaging bread, wherein air is blown from an air nozzle to widen the mouth to reduce wrinkles in the mouth of the packaging bag containing the bread, and the distance between the conveyors is gradually reduced. The process of pressing the mouth using a pair of upper and lower crushing conveyors that are constant and crushing the wrinkled mouth in the upper and lower horizontal state, and packing by closing the breadth with a pair of upper and lower guide bars and closing A step of discharging excess air in the bag, and a step of sealing a mouth crushed vertically and horizontally by gripping and moving by a pair of heated upper and lower sealing conveyors. Method.