JPS6357305B2 - - Google Patents

Description

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

Conventionally, labels have been attached to lightweight, small-diameter containers such as ampoule containers by a method as shown in FIG.

That is, the ampoule A was received by receiving grooves C formed at equal intervals on the circumferential surface of a rotating disc B, and the label L was attracted and guided to the approaching pasting drum D, where it was pasted.

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. 6, 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 a roller (not shown) is arranged in the receiving groove C, and a device is also manufactured in which the ampoule A is received and rotated by this bearing or roller.

However, in the case of the type in which bearings and rollers are arranged, although the ampoule A does rotate, the structure in which a plurality of rollers etc. are provided for each groove is complicated and requires maintenance.

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 pasting device that can eliminate the frictional resistance of a container when pasting a label and perform label pasting under optimal conditions. The purpose is to

<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 friction disc that rotates in a direction that promotes the rotation of the ampoule A, and the contact between the ampoule A and the circumferential surface of the receiving groove C is eliminated. It is.

In short, since the circumferential surface of the friction disk 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.

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

The circumferential surface of the pasting drum 1 is coated with a cushion material 12 having excellent elasticity, such as rubber, and a large number of suction holes 13 for generating negative pressure are formed in the circumferential surface of the cushion material 12.

At the bottom of the pasting drum 1, for example, a roll cutter may be used to supply labels cut into predetermined dimensions immediately before being transferred to the pasting drum 1, or pre-cut labels may be stored in a holder. A negative pressure groove 14 that continuously communicates between a label supply device (not shown), such as a type that sequentially supplies labels from this holder, to the closest container supply device 2, which will be described later.
form.

One end of the negative pressure groove 14 is connected to a vacuum pump to constantly generate negative pressure.
4, negative pressure is generated in the group of suction holes 13 located directly above the negative pressure groove 14.

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

<2> Receiving plate The receiving plate 5 is a disk for the purpose of supplying the containers M to the pasting drum 1, and has a rotating shaft 4 at its center.
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.

<3> Friction disc A friction disc 6 that shares the rotating shaft 4 is installed on the lower surface of the receiving disc 5. However, this friction disc 6 rotates in the opposite direction to that of the receiving disc 5.

The diameter of the friction disc 6 is formed to be slightly smaller than the diameter of the receiving disc 5, and the peripheral surface of the friction disc 6 is formed to protrude into a receiving groove 51 formed on the peripheral surface of the receiving disc 5.

For example, a rubber elastic material 6 is provided on the circumferential surface of the friction disc 6.
1.

Further, the rotational speed of the friction disc 6 is configured to be adjustable independently of the receiving disc 5.

The distance between the points where the circumferential surface of the friction disc 6 is closest to the pasting drum 1 is formed to be slightly smaller than the diameter of the container M, and when the container M passes between this gap, the circumferential surfaces of the pasting drum 1 and the friction disc 6 The structure is configured so that it sinks in somewhat.

Next, the operation will be explained.

<1> Label supply The label L supplied from the label supply device is attracted to the suction hole 13 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.

<2> Container Supply At the same time as the labels L are supplied, the receiver 5 guides the containers M approaching from the tangential direction of the receiver 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.

During movement, the container M lightly contacts the circumferential surface of the friction disc 6 that protrudes into the receiving groove 51.

<3> Attaching the label The container M, which is supported by the receiving groove 51 of the receiving plate 5 and approaches the attaching drum 1, attracts the label L just before passing the point where the friction disk 6 and the attaching drum 1 are closest to each other. Adhesion is started from the tip of the label L in order to come into contact with the circumferential surface of the pasting drum 1.

When it comes into contact with the circumferential surface of the pasting drum 1, the container M
is forcibly rotated by simultaneously receiving the rotational force of the pasting drum 1 and the rotational force from the friction disc 6.

At this time, if the rotational speeds of the pasting drum 1 and the friction disc 6 are adjusted appropriately, the container M is separated from the receiving groove 51 and is completely rotated by the drum 1 and the friction disc 6.

As described above, when attaching the label L to the container M, it is possible to ignore the frictional resistance of the container M and give it smooth rotation, so the tip of the label L does not slip or the label L does not bend. Can be pasted accurately.

Furthermore, since the circumferential surfaces of the pasting drum 1 and the friction disc 6 are made of an elastic material, when the container M passes through, the container M is bitten into the circumferential surfaces of both.
are in surface contact with the circumferential surfaces of the pasting drum 1 and the friction disc 6, respectively.

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 13 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, and the label L is pasted. Complete.

<4> Moving the container and adjusting the rotational speed of each disc 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 slightly but gradually moves away from the upstream peripheral 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 friction disc 6 are made of an elastic material.

That is, as shown in FIG. 7, if the peripheries of the pasting drum 1 and the friction disc 6 are made of non-elastic material, the container M will only make point contact with the pasting drum 1 at point P for a moment. Then, immediately before and immediately after, as shown by broken lines, there is no contact with the pasting drum 1.

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 friction disc 6 are formed of an elastic material,
The distance between the pasting drum 1 and the friction disk 6 is formed to be slightly smaller than the diameter of the container M, so that the container M sinks into the circumferential surfaces of both disks when the container M passes through.

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, due to the rotation of the pasting drum 1 and the friction disc 6, the container M and the receiving groove 51 are rotated at a slightly faster speed than the rotation of the receiving disc 5. , the rotation speeds of both disks are set so that the container M starts moving downstream.

When setting the rotational speed, by setting the circumferential speed of the friction disc 6 to be slightly slower than the circumferential speed of the pasting drum 1, the container M can be gradually moved downstream.

At this time, some friction will occur due to the difference in the circumferential speed of the friction disk 6 and the circumferential speed of the pasting drum 1, but the friction disk 6 rotates 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.

Incidentally, the circumferential surfaces of the pasting drum 1 and the friction disc 6 may be made 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 Examples Although the device of the above embodiment was explained in the case where the receiving plate 5 with the friction plate 6 was arranged in the horizontal direction, the same effect can be obtained in the case of the type in which the receiving plate 5 with the friction plate 6 is arranged in the vertical direction (not shown). can be expected.

Further, in the embodiment described above, the friction disc 6 was configured to rotate in the opposite direction to the receiving disc 5, but even if the friction disc 6 is in a fixed state, the label can be printed by appropriately selecting the rotation speed of the pasting drum 1. It is possible to separate the container M from the receiving groove 51 for the time required to wrap it, thereby allowing it to rotate freely.

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

<B> By appropriately selecting the rotational speed of the pasting drum, friction disc, and receiving plate, or the rotational speed of the pasting drum and receiving plate, the contact with the receiving groove can be cut off while the container is in contact with the pasting drum. rotation can be forcibly applied.

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 if the container is small in diameter and light in weight, forced rotation can be applied to the container to rotate the container, thereby preventing the label from slipping or bending.

<C> 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.

[Brief explanation of the drawing]

Figure 1: Explanatory diagram of one embodiment of the present invention, 2nd and 3rd
Figure: Explanatory diagram of the pasting drum, Figure 4: Explanatory diagram of the receiving plate and friction disc, Figure 5: Explanatory diagram of label pasting,
FIG. 6: An explanatory diagram of a conventional device. FIGS. 7 and 8: An explanatory diagram showing the action of the present invention. 1: Gluing drum, 2: Gluing roller,
5: Receiving plate, 6: 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 groove with an inner diameter larger than the outer diameter of the container is formed on the circumferential surface of the receiving plate, and a friction plate is provided that shares a rotating shaft with the receiving plate and can rotate in the opposite direction to the receiving plate. , the peripheral edge of the friction disk is exposed in the receiving groove of the receiving plate, and the rotational speed of the friction disk is configured to be adjustable; at least the peripheral edge of the friction disk is made of an elastic material; and the container in the receiving groove is pasted. A labeling device that affixes a label between a labeling drum and a friction plate to eliminate contact between the container and the receiving plate.