JPS6357307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a label sticking device.

When attaching a label to a container such as an ampoule, the ampoule is lightweight and tall compared to its radius, making it unstable, and its small radius makes it difficult to wrap around even a flexible label. There were problems with labeling, especially at high speeds.
Conventionally, therefore, labeling was carried out using the method shown in FIG.

In other words, the ampoule A is received by the receiving grooves C formed at equal intervals on the circumferential surface of the rotating disc B, and the label L is adsorbed to the side surface and brought into contact with the rotating pasting drum D, so that the label L is pasted on the outer circumference of the ampoule A. It was a mechanism.

At this time, since the pasting drum D is configured to rotate at a higher speed than the disk B, the ampoule A guided to the pasting drum D comes into contact with the pasting drum D and receives its rotational force, and receives the receiving groove. The receiving groove C rotates in the direction opposite to the moving direction of the receiving groove C.

Then, as the ampoule A rotates, the label L is wound up and pasted from the pasting drum D.

Therefore, if the ampoule A can be rotated uniformly, the label L can be attached accurately.

However, in the conventional device, as shown in Fig. 5, when ampoule A rotates, ampoule A is pressed against the circumferential surface of receiving groove C, and frictional resistance is generated between ampoule A and receiving groove C. do.

As a result, rotation of ampoule A becomes uneven,
Label L may slip or sag, causing the label L to
Accurate pasting becomes difficult.

Therefore, in order to reduce the frictional resistance with the ampoule A, a bearing or roller D is placed in the receiving groove C as shown in Fig. 6, and this bearing or roller D receives the ampoule A to reduce the frictional resistance as much as possible. A device that rotates it is also manufactured.

However, although this type allows the ampoule A to rotate more easily, the structure is complicated and requires maintenance because a plurality of rollers are provided for each groove.

Moreover, since resistance still exists in both bearings and rollers, it is difficult to avoid rotation delays and uneven rotation of ampules, etc., especially when working at high speeds.

For this reason, a method of printing a label directly on the circumferential surface of the ampoule instead of pasting it on the circumferential surface of the ampoule has recently been used, but this method has the following problems.

<B> The ink tends to shift easily and the print is unclear.

<B> The smaller the diameter of the ampoule, the more difficult it is to print.

<C> During printing, even if the ampoule is received by a bearing, a small amount of frictional resistance still occurs between the ampoule and the bearing, resulting in the same problem as when pasting a label.

The present invention has been made to improve the above-mentioned points, and provides a label that has a simple structure and can eliminate the frictional resistance of the container when pasting the label, thereby allowing the label to be pasted under optimal conditions. The purpose of the present invention is to provide a pasting device.

<Principle of the present invention> As described above, in the conventional device, when the ampoule A is rotated, the ampoule A and the circumferential surface of the receiving groove C come into contact with each other.
This frictional resistance makes it difficult to attach the label L accurately.

Therefore, in the present invention, instead of the receiving groove C, the ampoule A is held by a floating friction disc that rotates in a direction that promotes the rotation of the ampoule A, and the ampoule A and the receiving groove C are
This eliminates contact with the surrounding surface.

In short, since the circumferential surface of the floating friction disc holding one side of ampoule A moves in the same direction as the rotation of ampoule A, the occurrence of friction can be reduced.

Next, an example will be described.

<A> Pasting Drum The pasting drum 1 is a drum for the purpose of transferring and pasting a regular-shaped label L onto a container M, and is rotatably supported by a shaft 11 in the center.

The circumferential surface of the pasting drum 1 is coated with a cushion material 12 having excellent elasticity, such as rubber, and the circumferential surface of the cushion material 12 is further provided with a large number of suction holes for generating negative pressure.

A negative pressure groove 14 is provided in the bottom of the pasting drum 1. This groove can be used, for example, to supply labels cut to predetermined dimensions using a roll cutter just before being transferred to the pasting drum 1, or to store pre-cut labels in a holder and sequentially label them from this holder. A section from a known label supplying device such as a type that supplies a container to a container supplying device 2, which will be described later, is continuously formed.

One end of the negative pressure groove is connected to the vacuum pump,
Negative pressure is always generated, and the configuration is such that negative pressure is generated in the suction hole group located directly above the negative pressure groove 14 only when passing over the negative pressure groove 14.

Further, a gluing roller 2 is arranged close to the gluing drum 1.

<B> Receiving plate The receiving plate 5 is a disk for the purpose of supplying the container M to the pasting drum 1, and a rotating shaft 4 is located at the center of the receiving plate.
is configured to be pivoted and rotatable.

Semicircular receiving grooves 51 having a radius somewhat larger than the radius of the container M are recessed at equal intervals on the circumferential surface of this disk.

A curved guide 7 is installed around the receiving plate 5 from when the container M is supplied to the receiving groove 51 until it approaches the pasting drum 1 in order to prevent the container M from coming off from the receiving groove 51.

<C> Floating friction disk A floating friction disk 6 that rotates independently of the rotating shaft 4 is installed on the lower surface of the receiving plate 5.

The floating friction disk 6 is a disk that has a shaft 61 passing through its center and is rotatably supported on the shaft 61 via a bearing or the like, and a cushion material 62 made of rubber, for example, is provided on the circumferential surface of the disk 6. Cover.

That is, the floating friction disk 6 is not configured to rotate, but is configured to always allow free rotation.

The floating friction disk 6 is arranged on a straight line connecting the receiving plate rotating shaft 4 and the pasting drum rotating shaft 11 at a position where the circumferential surface of the floating friction disk 6 protrudes into a receiving groove 51 formed on the circumferential surface of the receiving plate 5. do.

Furthermore, the distance between the points where the circumferential surface of the floating friction disc 6 is closest to the pasting drum 1 is formed to be slightly smaller than the diameter of the container M, as shown in FIG. In addition, it is constructed so as to bite into the circumferential surfaces of the pasting drum 1 and the floating friction disc 6 to some extent.

Next, the operation will be explained.

<B> Label supply The label L supplied from the label supply device is attracted to the suction hole on the circumferential surface of the pasting drum 1 that generates negative pressure, and is directed toward the receiving plate 5 as the pasting drum 1 rotates. and move.

During the movement, it comes into contact with the gluing roller 2 and is pasted on the back side of the label L.

<B> Supply of Containers Simultaneously with the supply of labels L, the receiving plate 5 guides the containers M approaching from the tangential direction of the receiving plate 5 toward the pasting drum 1 while receiving them in the receiving groove 51 one after another.

At this time, the container M in the receiving groove 51 is reliably guided to the pasting drum 1 by the curved surface in the receiving groove 51 and the guide 7 without falling off.

<C> Attaching the label When the container M, which is held in the receiving groove 51 and continues to move, approaches the attaching drum, the peripheral surface of the floating friction disk 6 protrudes from within the receiving groove 51, and the container M is attached to the floating friction disk 6. begins to make contact with the surrounding surface.

Furthermore, just before the container M passes the point where the floating friction disk 6 and the pasting drum 1 are closest,
Since the container M comes into contact with the circumferential surface of the pasting drum 1 that has attracted the label L, the container M rotates in response to the rotation of the pasting drum 1, and adhesion of the label L starts from the tip.

At this time, the floating friction disk 6 receives a force due to the movement of the container M and is forced to rotate in the same direction as the pasting drum 1.

The container M comes into contact with the circumferential surfaces 12 and 62 of both drums 1 and 6 while being bitten into contact, and simultaneously receives rotational force not only from the pasting drum 1 but also from the floating friction disk 6 which is freely supported. As a result, the container M is forced to rotate.

By giving forced rotation to the container M, the container M separates from the side surface inside the receiving groove 51 and
It is freed from the contact floating friction.

Therefore, since the container M can be given smooth rotation ignoring frictional resistance, the label L can be attached accurately without the tip of the label L slipping or bending.

Further, the circumferential surfaces of the pasting drum 1 and the friction disc 6 are covered with a cushioning material 62, so that when the container M passes through, the container M bites into the peripheral surfaces of both, and the container M is covered with the pasting drum 1 and the friction disc 6, respectively.
make surface contact with the circumferential surface of the

Since surface contact has a larger contact area than point contact, the label L is in contact with the container M for a certain period of time, so that the label L can be reliably affixed to the container M.

When the label L adsorbed to the suction hole on the circumferential surface of the pasting drum 1 passes the end of the negative pressure groove 14, the negative pressure is cut off, and the label L is sequentially moved from the pasting drum 1 to the container M, completing the pasting of the label L. do.

<d> Moving the container and adjusting the rotational speed of each disk As shown in FIG. 1, the container M in the receiving groove 51
is pressed against the upstream peripheral surface of the receiving groove 51 and transported to the pasting drum 1.

The pasting drum 1 is rotating in a direction to move the container M downstream.

Therefore, the rotational speed of the pasting drum 1 is set to such a speed that when the pasting drum 1 comes into contact with the container M, the container M gradually moves away from the upstream circumferential surface of the receiving groove 51 toward the downstream side. do.

That is, the transport speed of the container M to the downstream side is set to be slightly faster than the rotation speed of the receiving plate 5.

This makes it possible to attach the label L while the container M is completely separated from the receiving groove 51.

What is important at this time is that the peripheral edges of the pasting drum 1 and the floating friction disc 6 are made of an elastic material.

That is, as shown in FIG. 7, if the peripheral edges of the pasting drum 1 and the floating friction disc 6 are made of non-elastic material, the container M will not fit into the pasting drum 1.
There is only a momentary point contact at point P, and there is no contact with the pasting drum 1 immediately before and after, as shown by the broken line.

Therefore, the container M is always pressed by the receiving groove 51 and is in contact with the receiving groove 51.

Therefore, even if the label L is pasted by rotating the pasting drum 1 at high speed in this state, frictional resistance will occur between the label L and the receiving groove 51, as in the conventional case.

However, in the present invention, as described above, the peripheral edges of the pasting drum 1 and the floating friction disc 6 are formed of an elastic material, and the interval between the pasting drum 1 and the floating friction disc 6 is formed to be slightly smaller than the diameter of the container M. Container M
The container M is configured to sink into the circumferential surfaces of both discs when passing through the discs.

Therefore, as shown in FIG. 8, the container M comes into contact with both disks by a distance d, and is in surface contact with both disks for a long time.

Therefore, at the beginning of contact, the container M and the receiving groove 51 are in contact with each other, but immediately after that, the container M is rotated by the rotation of the pasting drum 1 at a speed slightly faster than the rotation of the receiving plate 5. The rotational speed of the pasting drum 1 is set so that it starts moving downstream.

Here, in order to gradually move the container M downstream, it is necessary to set the peripheral speed of the floating friction disc 6 to be slightly slower than the peripheral speed of the pasting drum 1. Since the circumferential surface of a dynamic friction disc is a curved surface, rotation is not transmitted completely like a gear.

Therefore, the circumferential speed of the floating friction disc is inevitably slower than that of the pasting drum.

Therefore, the container M can be easily positioned completely away from the receiving groove 51 by simply adjusting the rotation of the pasting drum.

At this time, some friction will occur due to the difference in the circumferential speed of the floating friction disk 6 and the circumferential speed of the pasting drum 1, but the floating friction disk 6 will rotate in a direction that promotes the rotation of the ampoule A. It is clear that the frictional resistance is significantly reduced compared to the case where the circumferential surface of the receiving groove 51 is pressed against the ampoule A as in the conventional device.

In this manner, the label L can be accurately pasted while the container M is completely separated from the receiving groove 51 by reducing frictional resistance.

Note that either one of the circumferential surfaces of the pasting drum 1 and the floating friction disc 6 may be formed of an elastic material.

Furthermore, it should be noted that if the rotational speed of the pasting drum 1 is set too fast, the container M will come into contact with the peripheral surface on the downstream side of the receiving groove 51 before the pasting of the label L is finished, and frictional resistance will increase. This is something that happens.

Therefore, the rotational speeds of the pasting drum 1 and the receiving plate 5 should be set so that the pasting of the label L can be completely completed before the container M catches up to and contacts the peripheral surface on the downstream side of the receiving groove 51. is necessary.

<5> Other Embodiments Although the device of the above embodiment has been described in the case where the receiving plate 5 with the friction plate 6 is arranged in the horizontal direction, in the case where both the receiving plate 5 and the friction plate 6 are arranged in the vertical direction (i.e. A similar effect can be expected when the axes 4 and 61 are horizontal.

Since the present invention is as explained above, the following effects can be expected.

<B> The container rotates freely due to the frictional force with the pasting drum, and receives almost no frictional resistance from the receiving groove. Therefore, unlike placing a bearing or roller in the receiving groove, there is no need to consider the frictional resistance due to contact between the container and the receiving groove when applying the label, and the label can be applied under ideal conditions. can.

<B> Therefore, even in the case of a small-diameter, light-weight container such as an ampoule, free rotation can be given to the container and the container can be rotated, thereby preventing the label from slipping or bending.

<C> The floating friction disk does not need to be constructed into a complicated rotation mechanism, but simply needs to be rotatably supported, and has a simple structure and can be easily installed in existing equipment.

<d> Since the free-floating friction disk is configured to be rotatable, it is automatically synchronized with the rotation of the labeling drum when labeling is applied.

Therefore, in order to release the container from contact with the receiving groove, there is no need to consider adjusting the speed of the floating friction disk, and it is only necessary to adjust the relative circumferential speed of the pasting drum and the receiving plate. is easy.

<E> Since the circumferential surface of the pasting drum and the circumferential surface of the friction disc are made of elastic material, the container comes into surface contact with the respective circumferential surfaces when passing between the two circumferential surfaces.

When the container contacts the pasting drum for only a moment, the contact between the container and the pasting drum is point contact, so it is necessary to apply the label at high speed.
When the container is in surface contact with the pasting drum and the friction disk as in the case of the present invention, the contact time is longer than in point contact, so the label can be wrapped slowly and reliably.

<f> The present invention is an improvement on the invention (Japanese Patent Application No. 57-213983) filed by the applicant before this application.

That is, the friction disc in the previous invention was configured to be able to rotate independently, and it was necessary to provide a rotation mechanism dedicated to the friction disc.

As a result, the device becomes complicated and manufacturing and operating costs increase.

Therefore, the applicant constructed a freely rotatable floating friction disk using a bearing or the like for the friction disk, and succeeded in obtaining the various effects described above.

Therefore, it has become possible to reduce manufacturing costs and operating costs.

[Brief explanation of drawings]

Figure 1: An explanatory diagram of an embodiment of the present invention, Figure 2: An explanatory diagram of a receiving plate and a friction disc, Figure 3: A cross-sectional view of - in Figure 2, Figure 4: An explanatory diagram when a label is attached. ,
Figures 5 and 6: Explanatory diagram of the conventional device, Figures 7 and 8:
FIG. 2 is an explanatory diagram showing the effect of the present invention. 1: Gluing drum, 2: Gluing roller,
5: Receiving plate, 6: Floating friction plate.

Claims (1)

[Claims] 1. A pasting drum and a receiving plate are attached to two rotating shafts located in parallel, and a container is passed through the gap between the circumferential surface of the pasting drum and the circumferential surface of the receiving plate to print the label. In this device, a receiving structure with an inner diameter larger than the outer diameter of the container is recessed on the circumferential surface of the receiving plate, and the receiving structure is placed on a straight line connecting the rotating axis of the receiving plate and the rotating axis of the pasting drum. A floating friction disc is rotatably attached to the central shaft located between the rotating shaft of the disc and the receiving groove, and the diameter of this floating friction disc is formed to be smaller than the radius of the receiving disc. At least the peripheral edge of the floating friction plate is made of an elastic material so that it is exposed only in the receiving groove where the label is attached, and the label is applied by holding the container in the receiving groove between the sticking drum and the floating friction plate. A labeling device configured to attach labels.