JPS6251811B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a label pasting device for automatically pasting a rectangular label on the peripheral side wall of a tapered can without causing wrinkles. It is used in the field of manufacturing adhesive devices such as labels.

(Prior Art) Originally, the circumferential length of the circumferential side wall of a tapered can was different between the upper and lower portions, so that rectangular labels had to be attached manually. For example, if pasting is done using a conventional pasting machine, wrinkles may occur at the bottom of the label.
There was a problem that diminished the product value.

In order to solve this problem, a device has also been proposed in which the label is fed into the suction drum in an inclined manner (Japanese Patent Application Laid-open No. 125130/1983).

(Problems to be Solved by the Invention) According to the technique disclosed in JP-A-57-125130, it is necessary to set the inclination angle of the label to match the inclination angle of the tapered can, which is relatively difficult to adjust. .

Furthermore, it was difficult to attach square labels to tapered cans with different circumferential lengths without wrinkles.

(Means for Solving the Problems) The first invention of this application is a tapered suction drum that is rotatably installed on a vertical axis on one side of the opposing end of the inlet conveyor and the starting end of the outlet conveyor. and an inclined guide provided in the tapered can passage.

Vacuum small holes are formed in the upper and lower parts of the circumferential wall of the tapered suction drum, respectively, and the suction force in the lower part is increased by means of, for example, providing fewer small vacuum holes in the upper part than in the lower vacuum holes.
That is, the density of the upper and lower vacuum pores is different, thereby creating a difference in the holding power of the label. By making a difference in holding power in this way,
The lower part will serve as a reference, and the upper part will adhere accordingly.

Further, the inclined guide provided in the tapered can passage holds the side wall of the tapered can in contact with the side wall of the suction drum. Providing a device for imparting adhesive force to the label, such as a device for applying glue to the label, or a device for imparting adhesive force to the label, such as a device for applying glue to the label, or a device for heating the adsorption drum to impart adhesive properties by heating the glue applied to the label; By firmly holding the lower edge of the label and pressing the upper edge against the can, the upper edge stretches slightly and can be adhered without causing wrinkles.

The label shown above has glue and is in a state where it can be stretched slightly. Since it is pressed and adhered to the side wall of the can in this state, there is no risk of wrinkles. Incidentally, since the sheet is already in an expanded state when it is sucked by the suction drum, the pasting operation as described above becomes easier.

Next, a second invention of this application is one in which a gluing device is added to the first invention. The gluing device includes a gluing drum that applies gluing to labels, and a gluing transfer roll that supplies glue to the gluing drum, and a label feeder is provided on one side of the gluing drum. A scraper is installed between the suction drum and the gluing drum to remove the label from the side wall of the gluing drum and send it to the suction drum. Both the first invention and the second invention solve the above-mentioned conventional problems by making it possible to automatically attach a rectangular label to the side wall of a tapered can without wrinkles.

(Function of the invention) According to this invention, since the vacuum small holes are provided in the side wall of the tapered suction drum at different numbers and intervals on the upper and lower sides, if the same suction force (decompression suction) is applied to the vacuum small holes, the vacuum small holes The adsorption tightness can be freely adjusted by adjusting the number of labels, and the lower side of the label is tightly adsorbed, and the upper side is loosely adsorbed. In addition, since the guide of the tapered can is inclined, the tapered can is automatically brought into contact with the suction drum side while the can is being moved, and the label is smoothly transferred.

Therefore, it can be pasted without any wrinkles as if it were pasted by hand.

Furthermore, by changing the inclination angle of the guide, it is possible to immediately adapt to various tapered cans.

Furthermore, according to the second invention, since a gluing device is added, the processes from gluing to pasting are performed continuously.

When a rectangular label is attracted to a tapered suction drum, the lower side is held securely first (because the density of the small holes is large), and the upper side is held in a shape that follows the lower side. Therefore, the shape is as shown in Figure 4, but when it is pressed directly onto the tapered can side, the lower side A is almost directly transferred and attached to the side wall of the tapered can, and the upper side B is shaped like C in the figure. Since it is stretched slightly and transferred to the side wall of the tapered can and then affixed, there is no risk of wrinkles.

(Example) Hereinafter, this invention will be explained with reference to examples.

Tapered cans 3 are transferred at a constant speed in the direction of arrow 2 by an inlet conveyor 1. On the other hand, on one side of the entrance conveyor 1, a glue drum 4, a transfer rubber roll 5, a transfer steel roll 6, and a glue tank 7 are arranged in sequence, and each of the rolls rolls in the directions of arrows 8 and 9, respectively. Therefore, the glue in the glue tank 7 is applied to the glue drum 4 from the transfer steel roll 6 via the transfer rubber roll 5. A label feeder 1 is installed on one side of the gluing drum 4 (the side opposite to the entrance conveyor).
0, and each time the label feeder 10 is turned to one side, the stacked labels 11 are stuck to the outside of the gluing drum 4 from the bottom.

As the glue drum 4 rotates in the direction of arrow 12 in FIG. 1, glue is applied by the transfer rubber roll 5 and the label 11 is also attached.
By coming into contact with the suction drum 13 installed on the right side in FIG. 1, the label 11 on the peripheral wall of the transfer rubber roll 5 moves toward the suction drum 13 as the transfer rubber roll 5 rotates. In this case label 11
is peeled off from the top of the gluing drum 4 by the scraper 14.

The suction drum 13 has a tapered shape with a large diameter at the upper end and a small diameter at the lower end (Fig. 2), and small vacuum holes 1 are formed in the upper and lower parts of the side wall.
5 and 15a are installed in parallel. The number of upper vacuum small holes 15 is smaller than that of the lower vacuum small holes 15a, and they are bored at larger intervals. Therefore, after the label 11 is securely adsorbed and held by the lower vacuum hole 15a, the label 11 is inserted into the upper vacuum hole 15.
Since the upper side is suctioned with some flexibility, the shape of the rectangular label is matched to the lower side, and there is no risk of wrinkles.

Also, the tapered can 3 sent by the entrance conveyor 1
is the suction drum 13 from the end of the inlet conveyor 1.
During the curved movement along the guide rods 16, 16
Guided by a. The guide rod guides the upper and lower parts of the tapered can, and the outside of the tapered can is guided by an outer peripheral guide 17. In this case, a height difference is provided between the left and right guide rods so that the peripheral side wall of the tapered can is brought into contact with the peripheral side of the suction drum 13.

Therefore, the tapered can completes labeling while passing over the guide rod as shown by the arrow 18, and is transferred from the end edge of the guide rod to the starting end of the exit conveyor 19, and is moved to the next process. In the figure, 20 and 21 are guides provided on both sides of the entrance conveyor 1 and the exit conveyor.

Further, the suction drum is hollow, and its shaft 22
is a hollow shaft, and one end of the hollow shaft 22 is connected to the suction side of a vacuum pump, and the suction drum is constantly evacuated, so that the inner cavity of the adsorption drum is always maintained at a reduced pressure state.

In the above embodiments, the label was attached with glue, but instead of using glue, a layer (for example, polyethylene film) to be heat-welded may be provided on the back side of the label, and the peripheral surface of the tapered can may also be treated with synthetic resin. If so, by heating the adsorption drum to a predetermined temperature, it is possible to simultaneously transfer the label from the drum to the tapered can side and adhere it. Further, the arrangement of the inlet conveyor and the outlet conveyor, the relative position between the suction drum and the tapered can, etc. are not limited to the embodiments. For example, the suction drum and the tapered can may be rotated in a fixed position while in contact with each other.

(Effects of the Invention) According to this invention, since the density of the vacuum holes of the suction drum is made different on the upper and lower sides, when a rectangular label is suctioned to the suction drum, the lower part can be suctioned tightly and the upper part can be suctioned loosely. In addition, since the guide is tilted so that the tapered can comes into contact with the suction roll, even if the tapered peripheral wall is used, it can be correctly pasted without causing wrinkles. Therefore, even if this is transferred directly to the peripheral side wall of the tapered can,
Similarly, it has the effect of being able to be adhered without causing wrinkles. Therefore, it is possible to fully automatically mechanize labeling on the peripheral wall of tapered cans, which was conventionally considered difficult to apply except by hand. and,
By simply changing the inclination of the guide, it is possible to accommodate various tapered cans, and the adjustment is easy.

Furthermore, since a suction drum is installed between the inlet conveyor and the outlet conveyor, labels can be attached to the tapered cans while they are being moved. Therefore, the labeling process can be easily incorporated into the entire assembly process. Furthermore, according to the second invention, a gluing process can also be incorporated.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a front view showing the mutual relationship between the suction drum and the tapered can, and Fig. 4 is the same as that of the suction drum. It is an enlarged perspective view of the state of a label at the time. 1... Entrance conveyor, 3... Tapered can, 4... Glue drum, 5... Transfer rubber roll, 6... Transfer steel, 7... Glue tank, 10... Label feeder, 1
DESCRIPTION OF SYMBOLS 1... Label, 13... Adsorption drum, 14... Scraper, 15... Upper vacuum small hole, 15a... Lower vacuum small hole, 16, 16a... Guide rod, 17
...Outer guide, 19...Exit conveyor.

Claims (1)

[Scope of Claims] 1. The terminal end side of the inlet conveyor and the starting end side of the outlet conveyor are opposed to each other at a predetermined angle, and a tapered suction drum is installed on one side of the opposing portion of both conveyors so as to be freely rotatable about a vertical axis, Small vacuum holes are formed in the upper and lower parts of the circumferential wall of the suction drum, the suction force of the upper vacuum hole is smaller than the suction force of the lower vacuum hole, and a tapered can passage is provided on one side of the suction drum. In addition, an inclined guide for holding the side wall of the tapered can in contact with the side wall of the suction drum is installed in the passage, and a label heating device or a label gluing device or the like is installed on the suction drum. A tapered can label pasting device characterized by being equipped with a device that imparts adhesive force. 2. The tapered can label sticking device according to claim 1, wherein the label heating device is a device that heats a tapered suction drum. 3. The terminal end of the inlet conveyor and the starting end of the outlet conveyor are opposed to each other at a predetermined angle, and a tapered suction drum is installed on one side of the opposing portion of both conveyors to be rotatable about a vertical axis, and the suction drum is hollow. , connected to the vacuum piping via the hollow vertical shaft, with vacuum small holes bored in the upper and lower parts of the circumferential wall, the suction force of the upper vacuum hole being smaller than the suction force of the lower vacuum hole; A tapered can passage is provided on one side of the suction drum, and an inclined guide is installed in the passage to hold the side wall of the tapered can in contact with the side wall of the suction drum. A gluing drum is installed with its vertical shaft as a device for imparting adhesive force to the gluing drum, and a gluing transfer roll is placed in contact with the gluing drum, and a label feeder is installed on one side of the gluing drum. A tapered can label pasting device characterized in that a scraper is installed between the adhesive drum and the adhesive drum to remove the label from the side wall of the adhesive drum and send it to the suction drum. 4. The tapered can labeling device according to claim 3, wherein the adhesive drum is provided with a plurality of annular protrusions on the peripheral side wall.