JPS58125435A - Device for fusing heat-shrinkable label by hot air - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of an automated device for melt-cutting heat-shrinkable labels attached to bottles by blowing hot air onto the labels.

Generally, labels made of heat-shrinkable films attached to various types of bottles are peeled off and the surfaces of the bottles are cleaned and reused when used bottles are washed and reused. Conventionally, such labels are peeled off using a knife or the like. However, in recent years, it has become common practice to coat the surfaces of bottles with synthetic resin materials to prevent them from bursting and scattering. There are problems such as the edges clogging, and some kind of countermeasure is needed to replace this problem. In addition, even for ordinary bottles that are not coated, the trouble of being scratched by a knife is unavoidable, and methods such as mechanical stripping using a knife are not sufficient.

In this regard, the present inventors have endeavored to research new peeling means to replace this, and have developed a method for easily peeling and removing heat-shrinkable labels from used bottles.
It was previously filed as No. 137403. The present invention is characterized in that a label made of a heat-shrinkable film set in a bottle is cut by blowing hot air onto the section to be cut, and the label is peeled off. When carrying out this process, a large number of empty bottles are conveyed in a line in a certain posture, and during the conveyance process, an effective method is applied to the labels made of heat-shrinkable film attached to these empty bottles. It is necessary to develop a series of mechanical means, that is, devices, for blowing the necessary hot air on the label and removing the fused label, which can be labor-saving and automated, and can smoothly perform accurate operations. Good economic efficiency must be obtained.

The present invention is based on the above-mentioned viewpoints, and aims to provide an apparatus that satisfies the necessary conditions and is capable of accurately and easily cutting heat-shrinkable labels adhered to the surfaces of used bottles. Its features include a conveyor for transporting bottles with heat-shrinkable labels attached, a member rotatably disposed on one side of the conveyor, and a member for positioning and holding the bottles and a heat-shrinkable label. It consists of a rotary table equipped with a slit-shaped hot air jet nozzle that can move forward and backward toward the shrinkable label, and a bottle transfer member that is rotatably arranged between the conveyor and the rotary table.

The present invention will be described in detail below with reference to the illustrated embodiments.

In the embodiment of the device of the present invention shown in FIGS. 1 to 4, 1
A conveyor (2) for linearly moving in one direction an empty bottle (1) on which a heat-shrinkable bell ω is attached on the body of the machine is not shown. A known Inford screw (3) is installed on one side of the conveyor (on the conveyance entrance side) for regulating the interval between empty bins fl to a constant value.
) are rotatably arranged in parallel.

A rotary table ( ) is rotatably disposed on the other side of the conveyor (2) opposite to the screw (3).

The same rotary table (γ)K has an annular taper surface (2
) are formed, and on the table surface (2), positioning stands (b) that support the bottoms of the empty bottles Tl) are arranged in radial rows at regular intervals K.
On the inner periphery of the casing αη, vertically elongated slit-shaped hot air jet nozzles (sets of nozzles are arranged in rows at equal intervals on the circumference, each of which can move forward and backward in the radial direction). Further, above the casing Gη, there is a large head (6a) on which a group of chucking heads (6) are installed concentrically with the rotary wheel of the rotary table (7). 7), and the large head (6a) has a diameter equal to or larger than the annular table surface (to), and an empty bottle (11 The chucking head (6) group that holds the upper part of the
The chucking head (6) is arranged in a line on the same pitch as the upper positioning stand Q4, and is movable up and down to detachably hold the upper part of the empty bottle (1). The empty bottle fl) can be positioned and maintained on the table surface (top) by the king head (6) and the positioning stand (b). In the example shown, the hot air jet nozzle (5) and the hitching head (
6) Is the rotary table with a table surface (2) equipped with a positioning stand O◆ a machine base? l) Supports erected on top (2) (2) Frame erected across K (b)
It is received by the shaft and rotates as a unit due to the rotation trap of the rotation axis weight. Furthermore, an empty bottle [1] on the conveyor (2) is placed between the terminal end of the Inford screw (3) on the conveyor 121K and the circumferential side of the table surface (to) the rotary table (7). A known star wheel (4) for transfer is arranged rotatably and interveningly on the conveying surfaces of both, and correspondingly the exit side of the conveyor (2) and the rotary table ( 7) Between the station side of the table surface (to) in K, there is also a rotatable star wheel (9) for transferring empty bottles +1) on the table surface (to) onto the conveyor (2).
Moreover, it is arranged in an intervening manner on the conveying surfaces of both. Note that the hot air supply means in the hot air jetting nozzle (s) described above, the advancing and retreating means of the nozzle (s), etc. are explained in the fifth section described later.
Another embodiment of the apparatus of the present invention will be explained in FIGS. 7 to 7.

Empty bottles (1
) The heat-shrinkable label ω attached to the paper is removed by fusing as follows. In Figures 1 to 3, empty bottles (1) covered with heat-shrinkable label armor are loaded onto a conveyor and conveyed one after another, and are conveyed one after another by an Inford screw installed in parallel with the conveyor. By the guidance of the screw surface (3), the barrel is engaged with the toothless part of the supply star wheel (4) while controlling the bin interval at a constant level, and as the wheel (4) rotates, the bins are successively kept at a constant pitch. The empty bottle (1) is transferred onto the table surface (to) of the rotary table (7), and at the same time, the empty bottle (1) is transferred with its bottom part to the table surface (to).
The chucking head (6) provided on the large head (6a) is engaged with the positioning stand provided above, and the chucking head (6) provided on the large head (6a) is lowered to hold the upper part of the empty bottle (11). 1) is held stably and immovably and moves with the rotation of the rotary table (7).At the same time, the hot air jet nozzle (5
) also moves forward and approaches the heat-shrinkable label (2) at a constant distance. Then, hot air at a predetermined temperature is passed through the nozzle: 5)
The label ω is fused and cut by being ejected from the slit and sprayed onto the label ω. In this process, the bin feeding pitch of the Inford screw (3) K is the same as the rotating feeding pitch of the feeding star wheel (4), and the rotary table ()) is also It rotates together with the hot air jet nozzle (5), the chucking head (6), the positioning stand (b), and the large head (6a).

As mentioned above, the empty bottle (ll#'!) is placed on the table surface (2) of the table (7) at a certain distance below, and the chucking head (6) is lowered and locked by the positioning stand 04, and the hot air jet nozzle (6 ), hot air is blown onto the adhered label ω surface to fuse and cut the label ω.In this way, the empty bottle with the label ω cut [
11 moves in the 11th order as shown in FIG. 2 as the rotary table (7) rotates, and the cut label ω
It is blown away by the pressure of hot air and peeled off from the empty bottle (1), and is then discharged and removed to the outside through the collection duct (8) installed on the outer circumference side of the table (7) as shown in the second figure. So, table 1? ) is approximately rotated, the empty bottle ■ without a label is removed from the table surface (toward) by the discharge star wheel (9) interposed between the table (1) and the conveyor (2). Conveyor (
! )K transfer and carried out to the primary process. At this time, when the empty bottle squirt engages the toothless part of the discharge star wheel (9), the chucking head (6) rises to release the bottle, and the hot air jetting nozzle 1! +) will also move backwards, increasing the distance from the bottle.

As will not be used in the above explanation, the three components of the rotary table (7), including the empty bottle (1), the chuck feeder (6), and the hot air jet nozzle (5), move synchronously as one set. , this time empty bottle fil and nozzle i)
It is preferable that the distance between the label and the label be constant during fusing. Therefore, when fusing the label ■ attached to a curved bottle shape, use a nozzle (6) with a slit curved along the bottle shape. is desirable. In addition, in the above process, the reason why the hot air jetting nozzle 6) moves back and forth toward the bottle surface is because the empty bottle f1) immediately after being transferred from the supply star wheel (4) to the table surface (end) is slightly If the hot air jetting nozzle does not move to a fixed position, it may collide with the empty bottle (1) and cause damage, and in this situation, it is preferable that the nozzle i61 is moved back and away from the empty bottle (1).

The characteristic operation of the device of the present invention is the related movement between the chucking head (6), the empty bottle (l), and the hot air jetting nozzle;
The position indicated by line A-A in Figure IJ2 is.

From the feed star wheel (4) to the rotary table (7)
) shows the position where the chucking head (6) is transferred onto the table surface (to).
) descends to hold the top of the empty bottle (1), and the bottom of the empty bottle (1) fits into the positioning stand (b) on the table surface (to), and the hot air jet nozzle (6) holds the empty bottle (1).
This is the state immediately before moving forward toward 1). At the next advancing position, the line C-C in Figure 2, the nozzle (fl) approaches the empty bottle (1), and the label is being cut before and after it is fused.

As shown in Figure 4 (tJK), the nozzle ill approaches the label and blows hot air to begin fusing it.

Also, the next advancing position is the position on line C-C in Figure 2.

This is the position where the empty bottle +11 moves and passes through the collection duct (8).
This shows the state immediately before the peeled label ω is blown into the collection duct (3). Subsequently, the next advancing position is the position on line D-D in Figure 2, which is the position where the table (the empty bottle T1 whose label ω has disappeared after one rotation of the force) is transferred to the discharge star wheel +91K. Then, raise the chucking head (6) as shown in Figure IJ4 (→).

This is a state in which the hot air jet nozzle tfil is retracted.

As described above, the automatic fusing cycle of the heat-shrinkable label ω is completed through the rotation of the rotary table ( ).

Next, another embodiment of the apparatus of the present invention shown in FIGS. 5 to 7 will be described. In this embodiment, in addition to the structure of the embodiment shown in FIGS. 1 to 4, the label holder is held during melt cutting, and the cut labels are blown away into the recovery duct (8) through blowing air. In each figure of 5.6.7!
Components designated by the same reference numerals as in the embodiments of FIGS. J1 to 4 indicate the same members, and therefore the added configuration will be mainly explained. That is, as shown in FIGS. 5 and 6, the hot air jet nozzle;
a) is the table surface (
The table center (7a) that supports
A pair of label holders (to) α are provided on both left and right sides of the main body (5a), sandwiching the nozzle (6), and both of the holders are elastically supported by springs (22). It is preferable that the head of the holder αG that comes into contact with the label holder has a certain degree of flexibility so as not to damage the bottle. The air blower nozzle (2) for blowing off the label and ensuring that it is collected in the collection duct (8) is attached to the table center (7a). are each connected to a pressurized air supply hose, and therefore, in this embodiment, the series of label fusing cycles is the same as the first one described above.
Figures 4 to 4 are exactly the same as those in the embodiment, but when the heat-shrinkable label ω of the empty bottle +11 transferred onto the table surface (to) is fused, a hot air jet nozzle is used to blow the empty bottle (11
The label holder part ω moves forward along with the forward approach to
The outer side of the label ■ facing the slit part of the nozzle (6) is lightly pressed and held by the head support via the spring support, and this holds the label ■ after being fused. is held in a substantially fixed position in order to feed it into the collection duct (8). After the label web is fused and cut by hot air blowing from the nozzle (6), when the empty bottle fl) reaches the collection duct (8) position with the label ω being lightly pressed by the west holder α6, the nozzle ( As the label holder α8 (to) retreats, the label holder α8 (to) also retreats, and by jetting pressurized air from the air blower nozzle (to)), the fused label can be peeled off and the duct ( 8) Blow the label into the collection duct (8) and actually peel off and collect the label ■? The other parts are exactly the same, and the series of operations is as shown in Figure 7 ((a) to (4)).
As shown in Figure (A), the empty bottles sent in close parallel on the conveyor ω are transported using the Inford screw (3).
) is transferred onto the table surface (2) of the a-JL table (2) at a fixed pitch and at regular intervals, and at the same time the bottom of the empty bottle is transferred onto the table surface (2) of the table surface (to) at a fixed pitch (2). The upper part of the bin +11 is held by the lowering of the chucking head (6). Next, as shown in Fig. 7G/(), the hot air jet nozzle i6 at the fusing position moves forward toward the empty bottle (1) and approaches the empty bottle (1) at a certain distance, and the label ■ is pressed by the label holders α and αG. , In this state, hot air is ejected from the nozzle (6) and blown onto the label ■, the label stub is fused, and the fused label j and empty bottle fl) and the hot air blowing nozzle ill are
The west air blow nozzle (to) of the label holder is connected to the table surface (
When it comes to the collection duct (8) position, the hot air injection nozzle ill label support α6 moves back together and pressurized air is applied to the label from the air blower nozzle (to). By being sprayed in the opposite direction, the fused label (2) is blown away into the collection duct (8) and collected in a shape. In this way, the empty bottle (1) from which the label ω has been removed reaches the position of the discharge star wheel (9), and as the chucking head (6) lifts and opens, it is discharged onto the empty bottle full conveyor (2). It will become. Furthermore, the fifth
, 6, a hot air supply vibrator H is connected to the nozzle body (5a), and the supply of pressurized air and hot air to the above-mentioned air blower nozzle) and nozzle il+ is carried out by the rotating wheel Qlt of the rotary table (7). - Utilize and install a pressurized air main pipe @ hot air main pipe via Rotary Joint Co., Ltd.
The hot air is distributed to a set number of nozzles (6) and a pressurized air supply hose to the air probe vibe (2) through the distribution panel. In addition, as shown in the figure, the chucking head (6) can be raised and lowered by attaching a lever to the large head (6a) side via a holder, and using a spring @l) to move the lifting rod of the chucking head (6) up and down. The lifting rod can be rotated integrally with the table (7) side via the guide rollers and guide rails m, and the operating rollers are engaged with the ring-shaped cams so that they can be held in place. 1 to 4, and the embodiment shown in Fig. 5. The present invention is not limited to the embodiment shown in FIG. 7.

The apparatus of the present invention is extremely excellent in that it can accurately and easily perform two-bell fusing from an empty bottle Tl) to which a heat-shrinkable label is attached. In other words, a large number of empty bottles +1)t- are conveyed by a linear conveyor (2) K, and then transported to a rotary table (
7) onto the table surface (to), hold a large number of empty bottles [1] on this table surface (to) in a stable and immovable upright position, and on the circular path by the rotation of the table ()), By arranging the group of hot air jet nozzles (6) in a radial manner so that they can move forward and backward, the fusing operation for the heat-shrinkable label ω can be carried out continuously and automatically, which is effective both qualitatively and quantitatively. It is possible to perform excellent and efficient processing, and is also available as a relatively compact device, which speeds up the complete melting of heat-shrinkable labels ω on large quantities of empty bottles, making it the most effective method for recycling and reusing empty bottles. It is useful as a tool that mechanizes the troublesome label removal process. In the case of fusing by hot air blowing K, the fusing time is shortened to optimize the operation of the device and to improve efficiency. 1 to 2■ range, the hot air temperature at the time of jetting is 150℃ or more, the hot air speed at the time of jetting is 30sa/s@a or more, and the distance between the nozzle (6) and the empty bottle (1) is 161W or less. , late and 2.
Actual tests have confirmed that complete melting can be achieved within 5 seconds, making it possible to efficiently increase the speed of automated lines.

Bottles to be covered by the present invention include glass bottles, ceramic bottles, metal bottles, etc., and are not particularly limited. In addition, a label made of a heat-shrinkable film is made of, for example, a thermoplastic film.

Refers to a heat-shrinkable label with printing on the back and/or front side.The film material may be made of a particular material such as polyvinyl chloride, polyethylene, polypropylene, etc. (There are no restrictions. Even if it is printed on the front side or the back side, if there is a transparent unprinted part and this part is difficult to melt, apply 1, for example, an average particle size of 0.1 to the entire surface of the L1 label or at least the unprinted part. ~
Applying a composition containing fine particles such as silica with a grain size of 10μ,
The surface may be treated in advance so that it can be easily melted and cut in the same manner as the uneven portions caused by printing, but in such a case, the composition may be made into a slurry and used in the form of an air blow pipe as described in the example. In addition, a pipe for applying (spraying) the composition may be provided for each nozzle (6), and a pipe for applying (spraying) the composition may be provided for each nozzle (6).
It is also easily possible to install it independently on the side.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the embodiment of the device of the present invention, FIG. 2 is a plan view of the same, FIG. 93 is a side view of the same, FIG. FIG. 6 is a side sectional view of the main part of the embodiment, FIG. 6 is a perspective view of the main part of the nozzle, and FIG. 7 is an explanatory view of the operating state of the same device. [11... Empty bottle, (2)... Conveyor, (3
)...Infort screw, (4)(9)...Star wheel, ;I)...Hot air jet nozzle, (6)...
・・Chucking head, ・rotary table, (8) ・・collection end), (2) ・・table surface. (B)...Positioning stand, (2)...Air blow nozzle, @...Label holder, Han...Heat-shrinkable label.

Claims (1)

[Claims] 1 A conveyor for conveying bottles with heat-shrinkable labels attached thereto, and a rotatable conveyor disposed on one side of the conveyor and movable toward the positioning and holding member for the bottles and the heat-shrinkable label. A heat-shrinkable label is made of a rotary table equipped with a slit-shaped hot air jetting nozzle, and a bottle transfer member rotatably arranged between the conveyor and the rotary table. A device that melts.