JPH044213B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a labeling machine that affixes labels to containers, and more specifically, the present invention relates to a labeling machine that affixes labels to containers. Concerning a labeling machine that can paste continuously.

[Prior Art] Conventional labeling machines that use tape-like labels are of a type that intermittently peels or cuts labels one by one in accordance with the flow of containers and then affixes the labels one after another. Therefore, there are limits to increasing the speed of labeling and to using labels of various lengths.
In addition, since labels and containers move intermittently, the noise and vibration that occur when they move and stop may cause the labels to be misplaced, worsen the work environment, or cause the containers to move intermittently. There were disadvantages such as failure of the labeling machine or loss of durability due to the movement.

[Problems to be Solved by the Invention] The present invention has been made to solve these drawbacks, and provides a highly durable labeling machine that can perform labeling at high speed and accuracy, and can also be used for labels of different lengths. The purpose is to provide

[Means and effects for solving the problems] The present invention has the following features: 1. (a) A conveyor 7 for conveying containers; (b) A pressure roll 5 disposed above the conveyor; A label pasting device comprising a star 6 that holds one container at a time and presses the container against the pressure roll 5, which is placed facing the pressure roll 5 with the center shifted to the rear side when viewed from the direction of travel, and primarily adheres the label to the container. (c) a crimping roll, and a short arc-shaped crimping receiving plate 9 having a concave shape with respect to the crimping roll and provided facing the crimping roll at a position on the front side of the star when viewed from the conveyor traveling direction. (d) a label pasting device having a short crimping path with a length of approximately 1/8 of the circumference of the crimping roll; (d) having an acute-angled tip provided at a position on the rear side when viewed from the conveyor traveling direction of the crimping roll; A label supply device consisting of a board adhesive label peeling tool 3, a roll 4 that feeds the tape-shaped mount with the adhesive label pasted to the peeling tool, and (e) a transmission provided on the drive shaft of the star. Regarding "Labeling Machine."

One of the features of the present invention is that the star holds one container at a time sent by the conveyor and presses against the pressure roll 5 to temporarily adhere the label to the container. This ensures that the label is always applied in the correct position on the container. In order to achieve this effect, the star must be disposed facing the pressure roll 5 with its center shifted rearward from the center of the pressure roll when viewed from the direction of travel of the conveyor.

By arranging it at such a position, the tip of the adhesive label peeled off by the adhesive label peeling tool is accurately guided and affixed to the container held by the star by the pressure roll.

The pressure roll 5 and the star 6 arranged in a specific positional relationship form a device for determining the position at which a label is attached to a container.

In order to always attach the label to the correct position on the container, it is necessary to hold each container one by one with a star and press it against the pressure roll 5, and in addition, the star must be placed in a special positional relationship with the pressure roll. is necessary. Such a special star has the advantage of being able to be synchronized with the pressure roll and label feed roll.

This effect will be explained in detail later in a comparative test.

The second feature of the present invention is that the crimping roll includes a crimping roll and a short arc-shaped crimping receiving plate 9 that is concave with respect to the crimping roll and is provided at a position on the front side of the star, facing the crimping roll, when viewed from the conveyor traveling direction. This is because a label pasting device with a short crimping path is installed.

In the label pasting process, it is this process, which can also be called the finishing step of label pasting, that determines the speed of pasting work. If sufficient pressure is not applied here, the label cannot be completely attached.

Therefore, conventionally, for example, as described in JP-A-58-1635, an arc-shaped crimping path was formed between a crimping roll and a presser wall, and a continuation path was formed between a presser conveyor and the presser wall. This required a long straight crimping path.

However, since this crimping path is where crimping is performed, naturally there is a lot of friction, and the speed cannot be increased, so this process was the rate-limiting step that determined the speed of label attachment.

The present invention improves on this rate-limiting step.
As a result of various studies, the present inventor has found that in order to shorten the crimping process, it is absolutely necessary to always attach the label to the correct position in the process of supplying the label to the container, which is the pre-stage of this process. I figured it out.

It is absolutely impossible to shorten the crimping process if the label is initially pasted at an inaccurate position and there are variations in the pasting position.

As described above, the present invention includes a crimping roll and a short arc-shaped crimping receiving plate that is concave for the crimping roll and is provided facing the crimping roll at a position on the front side of the star when viewed from the conveyor traveling direction. As shown in the drawing, a short crimping path with a length of approximately 1/8 of the circumference of the crimping roll was formed, making it possible to significantly shorten the crimping process, which is the rate-determining step.

The crimping receiving plate provided opposite the crimping roll must be a short arc-shaped plate that is concave with respect to the crimping roll. With other shapes, a short crimping path cannot be formed.

The position of the crimp receiving plate is also important. The crimping receiving plate is placed facing the crimping roll at a position in front of the star when viewed from the direction of conveyor movement, but in this position, the star is placed with its center rearward from the center of the crimping roll when viewed from the direction of conveyor movement. Since they are staggered, a crimping path is inevitably formed between the crimping roll and the circumference of the crimping roll, which is approximately 1/8 of the circumference at the front side when viewed from the direction of movement of the crimping roll conveyor. It is understood that it is very short compared to the conventional technology. If it is placed at a position different from this position, sufficient crimping cannot be achieved.

The labeling device of the present invention configured as described above is capable of primarily pasting labels at accurate positions at all times during the process of supplying labels to containers using the specially configured labeling positioning device described above. Therefore, the label can be completely pasted in a press-bonding process that requires a short distance, and has the effect of increasing the accuracy and speed of label pasting.

In addition, the label supply unit includes an adhesive label peeling tool 3, which is a plate with an acute-angled tip, and is provided at a position on the rear side when viewed from the direction in which the pressure roll conveyor moves, and a roll 4, which feeds out a tape-shaped mount to which an adhesive label is attached. The device uses a peeling tool to fold back the tape-like backing paper on which the adhesive label is pasted, and the tip of the label separates from the backing paper at the sharp end, and is guided by a pressure roll to temporarily stick the label to the correct position on the container held by the star. Wear it.

The third feature of the present invention is that a star drive shaft transmission is installed.

In a labeling machine, it is necessary that the operations of a label feed roll that supplies labels, a star that feeds containers to a crimping section, and a crimping roll that crimps labels onto containers are synchronized.

Otherwise, the label will not be properly affixed to the proper place on the container.

Normally, the various rolls of a labeling machine are driven by one power source, and the rotations of these rolls are almost synchronized. Therefore, the feeding pitch of the label, the feeding pitch of the container to the crimping section, and the crimping pitch are synchronized. It has become constant.

However, since labeling machines use labels with various lengths, if the pitches do not match due to changing the label length, in other words, the label feeding and transport speed and the container transport speed may not match. Therefore, as mentioned above, it is necessary to move labels and containers intermittently, and the noise and vibration generated during intermittent movement and stopping may cause the label pasting position to shift or cause damage to the work environment. There have been disadvantages such as deterioration of the labeling machine, or failure of the labeling machine or loss of durability due to intermittent movement.

Providing a transmission on the drive shaft of a pressure roll or a label feed roll other than a star must be avoided because it causes the following drawbacks.

The speed of the pressure roll is the source that determines the labeling speed, so it is desirable to keep it constant. This is because if the speed of this roll changes, the speed of the entire labeling operation will change. It is practical to fix the speed of the pressure roll constant and change the speeds of the other rolls to accommodate changes in label length, etc.

By the way, it is originally desirable that the speeds of the pressure roll and the label delivery roll be the same and synchronized. If the speed of one of the rolls is changed so that the speeds of the two rolls differ, for example, if the speed of the pressure roll is increased, the labels will not be supplied in time and the mount to which the labels are attached will break. Even if the speed of the label feed roll is slowed down, the backing paper is cut in the same way.

On the other hand, if the speed of the pressure roll is slowed down, the next label may be sent before the previous label has been pasted, or the end of the label that has peeled off from the backing paper may hang down and become loose or wrinkled. Generate defects. Similar defects occur even when the speed of the label feed roll is slowed down.

Therefore, in order to adhere labels while responding to changes in label length, etc., it is most rational to adjust the container feeding speed of the star.

Therefore, in the present invention, a transmission is installed on the drive shaft of the star.

However, in the past, only the adjustment of label supply was performed.

For example, the above-mentioned Japanese Unexamined Patent Publication No. 1635/1983 describes detecting the passage time of a roll label and adjusting the label feeding mechanism.

With such adjustment means, both the crimping means and the label supply means must be synchronized and adjusted, and it is not possible to quickly and accurately respond to changes in label length, etc.

This will be explained in detail in the comparative study section.

[Example] Next, the present invention will be specifically explained based on the drawings.

FIG. 1 schematically shows the entire mechanism of an embodiment of the labeling machine of the present invention.

Peelable labels 2 coated with a pressure-sensitive adhesive and attached to a tape-shaped release mount 1 are sequentially attached along the longitudinal direction of the release mount 1. The peeling tool 3, which has a plate-shaped tip with an acute angle, peels off the label 2 by folding back the release mount 1 at an acute angle, as shown in the perspective view of FIG. The release liner 1 is pulled by the rotation of the feed roll 4 and the label 2 is
send out.

The tip of the peeled label 2 is guided to a predetermined position by a pressure roll 5 placed above the conveyor, and the container 8 is shifted rearward from the center of the pressure roll when viewed from the direction of travel of the conveyor. The labels are held one by one by a star 6 disposed opposite to the pressure roll 5 and pressed against the pressure roll 5 to temporarily stick the label to a predetermined always constant position on the container 8. At this time, the containers 8 are transported at regular transport pitches by the stars 6. Star 6
Since the star 6, the delivery roll 4, and the pressure roll 5 are interlocked by a transmission installed in the transmission roll (see FIG. 3 described later), the delivery roll 4
Label feed pitch and pressure bonding roll 5
The conveyance pitch by the star 6 is determined in synchronization with the crimping pitch.

The details are shown in FIG. Figure 3 shows transmission 1
2, feed roll 4, pressure roll 5, star 6
This is a schematic diagram showing the relationship between the two, and the transmission 12 is provided on the drive shaft of the star 6. Then, the transmission 1 is aligned with the feeding pitch by the feeding roll 4 and the guiding and crimping pitch by the crimping roll 5.
The speed is changed using the speed change handle 13 of No. 2, and the conveying pitch of the star 6 is synchronized with the label feeding pitch, etc., and the deviation of each pitch that occurs due to a change in the length of the label is corrected. The transmission 12 used here may be either a stepless type or a step type, and the speed change may be performed by remote control without using the speed change handle 13.

In the present invention, such a transmission 12 is used because the output from the power source 14 is branched into three locations as shown in FIG. are rotated respectively. Therefore, the feeding pitch by the feeding roll 4, the guidance by the pressure bonding roll 5,
The crimp pitch and the conveyance pitch by the star 6 are always constant. However, as mentioned above, labeling machines use labels of various lengths, so if the pitches of each label do not match due to changes in the length of the label, in other words, the speed of feeding the label and the transportation of the container Sometimes the speeds do not match, and for this reason, as mentioned above, in the past, it was necessary to move the label and the container intermittently, and the noise and vibration generated during the intermittent movement and stopping of the movement made it difficult to place the label on the label. There have been disadvantages such as misalignment of the labeling machine, deterioration of the working environment, and failure of the labeling machine or loss of durability due to intermittent movement. By providing the transmission 12 on the drive shaft of the star 6 as in the present invention, the pitch can be adjusted and synchronized.

The container, on which the label 2 has been primarily pasted accurately in a predetermined position in this way, is attached to a pressure roll 5 and a star 6.
On the other hand, a short arc-shaped crimp receiving plate 9 with a concave shape for the crimp roll is provided at a position on the front side facing the crimp roll when viewed from the direction of conveyor movement, and the length of the crimp roll is about 1/8 of the circumference of the crimp roll. It is sent to a label applicator where a short crimp path is formed. The container to which the label is primarily pasted by this device is placed on a pressure roll 5.
Pressure is applied between the crimping receiving plate 9 and the crimping receiving plate 9, and the crimping of the label is completed. Because the label is primarily pasted in an accurate and appropriate position and the crimping path is properly placed, the short length of approximately 1/8 of the circumference of the crimping roll is shown in the drawing. The crimping path is sufficient for crimping.

The container 8 that has been crimped is transported by the conveyor 7. The container may be of any type as long as a label can be attached thereto, but a round container made of glass or synthetic resin is preferable.

Next, in order to clarify the necessity and effect of combining each structure of the present invention, a comparative test and its results will be shown.

Comparative Test The prior art in the comparative test refers to the invention described in JP-A-58-1635, and the comparative example refers to the invention in which the essential structure of the present invention is changed.

(1) Comparison test with conventional technology Using the device of the present invention and the device shown in Figure 1 of JP-A-58-1635, adhesive was applied to the same aluminum can with a height of 180 mm, a diameter of 65 mm, and an internal volume of 350 ml. Attached the label.

The number of cans is 600.

Table 1 shows the results of measuring the label pasting time.
Shown below.

Table 1 Time (seconds) Invention 60 Prior art 122 [Evaluation] It is understood that the labeling machine of the present invention can accurately attach labels to containers at more than twice the speed as conventional labeling machines. Ru.

(2) Comparative test on the effect of temporarily attaching a label by holding a container with a star The device of the present invention and the device of the present invention shown in Figure 1 of JP-A-58-1635 without using a star An adhesive label was affixed to an aluminum can having a height of 180 mm, a diameter of 65 mm, and an internal volume of 350 ml using the same apparatus as the present invention except that the screw guide was used as disclosed in this publication.

The number of cans is 600.

Table 2 shows the results of measuring the variation in the label pasting position.

Table 2 Number of inaccurate cans Present invention 3 Comparative example 65 [Note] Cans that were even slightly deviated from the predetermined position were counted as inaccurate cans.

[Evaluation] The consistency accuracy of label pasting position is 99.5 by holding the container with a star and pasting it first.
90% of traditional labeling machines
% or less. From this comparative test, it is understood that the star of the present invention is extremely effective in holding one container at a time and temporarily adhering them.

(3) Comparison test of the shape of the crimping receiving plate The device of the present invention was compared with the device of the present invention using a straight pushing plate and holding wall parallel to the conveyor in place of the crimping receiving plate to create a long pressing path. Using the same device as the present invention except for the height
An adhesive label was attached to an aluminum can with a diameter of 180 mm, a diameter of 65 mm, and an internal volume of 350 ml.

The number of cans is 600.

Table 3 shows the results of observing the label pasted state.
Shown below.

Table 3 Number of defective cans Present invention 2 Comparative example 93 [Note] Cans that deviated even slightly from the predetermined position were counted as defective cans.

The most common cause of discrepancy was a misalignment between the start and end positions of the label.

[Evaluation] Due to the primary bonding at an accurate position and the crimping roll of the present invention and the arc-shaped crimping receiving plate 9, a short crimping path with a length of about 1/8 of the circumference of the crimping roll was created at a special position. The misalignment accuracy of the label pasting position due to the formation is over 99.5%, far exceeding the 85% accuracy of conventional labeling machines. From this, the effect of providing the short crimping path of the present invention can be understood.

(4) Comparative test regarding installation of transmission (4-1) The device of the present invention and the device of the present invention, which is the same as the present invention except that the transmission is installed behind the label feed roll drive shaft instead of the star drive shaft of the device of the present invention. 180mm in height, 65mm in diameter, internal volume
An adhesive label was attached to a 350ml aluminum can.

The number of cans is 600.

Table 4 shows the results of observing the state of label attachment.

Table 4 Number of defective cans Invention 0 Comparative example 600 The backing paper was torn [Note] Cans with even the slightest abnormality were counted as defective cans.

is when the speed is increased.

is the case when the speed is slowed down.

[Evaluation] In the present invention, by providing a transmission on the drive shaft of the star, there is no occurrence of defective cans, and when a transmission is provided on the shaft of the label feed roll of the comparative example, the speed of the roll can be changed. In some cases, the next label was sent before the previous label had been attached, and there were cases where two labels were attached out of alignment.

In addition, it is understood that installing a speed changer in the star of the present invention is superior in each step compared to the case where the label is 100% wrinkled and the backing paper is cut if the speed is slowed down. Ru.

(4-2) Using the device of the present invention and the same device as the present invention except that a transmission was installed on the crimp roll drive shaft instead of the star drive shaft of the device of the present invention, An adhesive label was attached to an aluminum can with a diameter of 65 mm and an internal volume of 350 ml.

The number of cans is 600.

Table 5 shows the results of measuring the label pasting time.

Table 5 Number of defective cans Invention 0 Comparative example 600 The backing paper was torn [Note] Cans with even the slightest abnormality were counted as defective cans.

is the case when the speed is slowed down.

is when the speed is increased.

[Evaluation] In the present invention, since a transmission is provided on the drive shaft of the star, the occurrence of defective cans is 0, and when a transmission is provided on the shaft of the pressure roll of the comparative example, if the speed of the roll is increased, the number of defective cans is 0. If the speed is slowed down, the next label may be sent before the previous label has been pasted, or containers may have two labels pasted out of alignment. It is understood that the present invention is superior in many ways compared to the conventional method.

[Effects of the Invention] As explained above, the present invention combines the five essential components, and is capable of attaching labels to containers at more than twice the speed of conventional labeling machines. This invention has excellent effects in that there is no variation in the pasting position of the label, there is no shift in the pasting position of the label, and there is no occurrence of wrinkles in the label.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the entire mechanism showing one embodiment of the labeling machine of the present invention, FIG. 2 is a perspective view of the label feeding mechanism of the labeling machine of FIG. 1, and FIG. 3 is a diagram of the labeling machine of FIG. FIG. 2 is a schematic diagram showing the relationship between a transmission, a delivery roll, a pressure roll, and a star of the labeling machine. 1: Release mount, 2: Label, 3: Peeling device,
4: Delivery roll, 5: Pressure roll, 6: Star, 7: Conveyor, 8: Container, 9: Receiver plate, 1
2: Transmission, 13: Gear shift handle, 14: Power source.

Claims (1)

[Scope of Claims] 1. (a) A conveyor 7 for conveying containers; (b) A crimping roll 5 disposed above the conveyor; (c) a label adhesion positioning device comprising a star 6 that holds one container at a time and presses the containers placed opposite the crimping roll 5 to primarily affix a label to the container; (c) a crimping device; The roll and a short arc-shaped crimping receiving plate 9 which is concave to the crimping roll and which is provided facing the crimping roll at a position on the front side of the stow when viewed from the direction of conveyor movement, are formed so that the circumference of the crimping roll is approximately 1/1/2 of the circumference of the crimping roll. (d) an adhesive label peeling device 3, which is a plate having an acute-angled tip and is provided at a rear position when viewed from the conveyor traveling direction of the crimping roll; a roll 4 that feeds the tape-shaped mount with the adhesive label pasted to a peeling tool;
and (e) a transmission provided on the drive shaft of the star.
labeling machine.