JPS6126166Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a label that suction-holds and transports a label delivered from a label supply mechanism, applies glue to the label surface during the transport, and delivers the label to a container and attaches it to the container. The present invention relates to a pasting device.

In a label applicator, the rotational speed of the transfer drum that transfers the label to the container in order to apply it to the container must match the transfer speed of the container in order to ensure that the label is applied. The label position must occupy an accurate, undistorted position on the drum. However, especially in labeling devices that cut long roll labels into predetermined lengths and affix them to containers, it is difficult to do so because the label supply mechanism includes a cutting device or the label material has a length. There is a problem that the label feeding speed includes an uncertain factor that is difficult to control, and it is not always possible to accurately follow the rotation of the feeding drum. Therefore, it is difficult for the label to be accurately held in a predetermined position on the transfer drum, resulting in slight positional deviation, resulting in inaccurate affixation to the container. For this reason, conventionally, for example, in a label supply mechanism equipped with a delivery drum that delivers labels to a transport drum, a correction mechanism for correcting label misalignment is attached to the delivery drum, and this allows the label position to be corrected. It has been proposed to transfer and deliver to a transfer drum while controlling irregularities.
However, with such a configuration, there is a possibility that the position of the label whose position has been corrected may be misaligned due to unforeseen reasons when the label is delivered to the transfer drum. The disadvantage of this method is that the components including the vacuum mechanism become complicated.

In view of the above points, the present invention provides a label pasting device that can directly and accurately correct the label position on the label transport drum.
That is, this labeling device has a positioning mechanism provided on the outside of the transfer drum with an engaging claw that approaches and separates from the transfer drum in response to the rotation of the positioning mechanism, and the engaging claw is used to align the label on the transfer drum. let me interfere with
It is characterized by correcting the label holding position.

The present invention will be explained below with reference to illustrated embodiments. 1st
In the figures and FIG. 2, a cylindrical transfer drum 1
Label holding members 2 having a pair of upper and lower land portions 2a and 2b are attached to the outer peripheral surface of the label holding member 2 at regular intervals. Land portions 2a and 2b of the label holding member 2 are each provided with a suction hole (not shown).
As the transfer drum 1 rotates around its axis, a conventionally well-known vacuum generating mechanism (not shown) acts to create a vacuum state or atmospheric pressure in the suction holes in each required rotational region, and the land portions 2a, The label L is sucked onto the surface of 2b or released from it. That is, the label L supplied from the label supply mechanism (not shown) is attached to the label holding member 2.
The label is sucked and held by the vacuum pressure generated on the surfaces of the land portions 2a and 2b, and is temporarily released from the label holding member 2 to correct positional deviation as described later while the transfer drum 1 rotates. After positioning, the label L is again attracted to the land portions 2a and 2b, is coated with glue by a glue supply mechanism (not shown), comes into contact with the container, is released from the land portions 2a and 2b, and is affixed onto the container. .

Therefore, between the label supply mechanism and the glue supply mechanism, a positioning mechanism 2 is provided adjacent to the transfer drum 1.
0 and a guide member 11 are provided. Guide member 1
1 guides the label L temporarily released from the label holding member 2 and assists the positioning mechanism 20 in correcting the position of the label L, as will be described later. That is, the guide member 11 is provided along the transfer drum 1, and is sandwiched between a pair of parallel plates 11a and 11b that guide the upper and lower ends of the label L, and has a slight gap between the guide member 11 and the label holding member 2. facing each other,
It consists of a side plate 11c having a slit 11d through which an engaging claw 21 (to be described later) is inserted, and is attached to a fixed frame by a support 13. Therefore, when the label L passes between the parallel plates 11a, 11b and the side plate 11c, the land portion 2 of the label holding member 2
Even if atmospheric pressure is introduced into the suction holes a and 2b, the label L will not peel off.

The positioning mechanism 20 includes the parallel plates 11a, 11
It is provided with an engaging pawl 21 that can pass through the space between b and interfere with the label L on the label holding member 2. The engaging claw 21 is fixed to a pin 23 that is pivotally mounted on the rotating disk 22, and as the rotating disk 22 rotates, it passes between the parallel plates 11a and 11b and swings around the pin 23. It's becoming like that. On the other hand, a drive gear 25 at the tip of a support shaft 24 vertically disposed on the shaft of the rotating disk 22 meshes with a drum gear 26 disposed integrally with the transfer drum 1 below.
Therefore, the rotating disk 22 rotates in conjunction with the rotation of the transfer drum 1. Further, an intermediate shaft 27 is inserted and supported near the pin 23 of the rotating disk 22, and a sector gear 28 attached to the upper end of the intermediate shaft 27 is meshed with a pinion gear 29 fitted to the lower end of the pin 23. A cam follower 31 at the tip of an arm 30 attached to the lower end of the intermediate shaft 27 is engaged with a groove cam 33 of a cam plate 32 fixedly provided below the rotating disk 22.

Therefore, when the rotary disk 22 rotates, the sector gear 28 swings due to the engagement between the cam follower 31 and the groove cam 33, and in conjunction with this, the pinion gear 2
9, the pin 23 and the engaging claw 21 swing.
Thus, the shape of the grooved cam 33 is set so that when the engaging claw 31 interferes with the label L on the label holding member 2, it swings to press the label L relatively backward. In other words, when the engaging claw 21 passes near the transfer drum 1, the engaging claw 21 is slightly swung backward in the direction of rotation, as shown by the imaginary line 21' in FIG. Coupled with the introduction of atmospheric pressure into the suction holes of the land portions 2a, 2b of the label holding member 2, the label L is displaced backward and its holding position on the land portions 2a, 2b is corrected. The rocking of the engaging claw 21 is designed to stop at the position where its tip matches the front end of the land portions 2a, 2b, so that the label L always has its front end aligned with the land portion 2a, 2b.
The position is adjusted to match the front ends of a and 2b.

Note that the rocking of the engaging claw 21 is caused by the movement of the fixed side cam groove 33 in which the cam follower 31 interlocking with the engaging claw 21 engages.
By appropriately selecting the shape of the drum gear 2
6, the rotating disk 22 is rotated in conjunction with the driving gear 25, and the engaging pawl support pin 23, which is pivotally supported by the rotating disk 22, is interlocked with the cam follower 31 and can be operated synchronously with the transfer drum 1. is obvious.

Since this embodiment has the above configuration, the label L is attached to the container by operating as follows.

The tip of the roll label fed by the label supply mechanism is attracted to the label holding member 2 of the rotating transfer drum 1, and is cut by the cutter of the label supply mechanism. The cut label L is held with its leading end protruding forward from the ends of the land portions 2a, 2b of the label holding member 2. When this label L is transferred to the vicinity of the guide member 11, atmospheric pressure is introduced into the suction holes of the land portions 2a, 2b, and the label L is transferred to the land portions 2a, 2b.
Once released from 2b. At this time, the engaging claw 21 is already located in front of the label L, and the engaging claw 21 is already located in front of the label L.
is released from the land portions 2a, 2b, and simultaneously swings relatively backward to press the label L backward. As a result, the label L is corrected to a position where its front end matches the front ends of the land portions 2a and 2b. Next, when vacuum pressure is introduced into the label holding member 2 again and the label L is attracted, the engaging claw 21 is separated from the label L by the rotation of the rotating disk 22.
After the label L thus positioned is applied with glue by the glue supply mechanism, it comes into contact with the container, is released from the label holding member 2, and is affixed to the container.

3 and 4 show other embodiments of the present invention, in which the engaging claw 41 of the positioning mechanism 40 engages with the rear end portions of the land portions 2a, 2b of the label holding member 2,
It shows a structure for regulating the label L from the rear.
That is, the engaging claw 41 is connected to a rod 4 that is vertically attached to the swinging end of an arm 43 that is pivotally connected to a rotating disk 42.
4, and rotates with the rotation of the rotating disk 42 to approach and separate from the transfer drum 1. Rod 44
A cam follower 45 attached to the lower end of the rotary disk 42 is always engaged with a grooved cam 47 of a cam plate 46 fixedly provided below the rotary disk 42, so that the rod 44 swings according to the shape of the grooved cam 47. That is, the engaging claw 4
1 swings along the shape of the grooved cam 47 when approaching the label holding member 2, and the land portions 2a, 2b
engages the rear end of the Note that the other configurations are the same as those of the first embodiment.

The operation of the apparatus of the second embodiment having the above configuration is basically the same as that of the apparatus of the first embodiment, except that the label L is positioned from behind. That is, when the label L, which has been adsorbed in advance by protruding forward from the land portions 2a, 2b of the label holding member 2, passes through the guide member 11, the atmosphere is introduced into the suction holes of the land portions 2a, 2b. As a result, it is once released, and at the same time, the engaging claw 41 swings and engages with the rear end portions of the land portions 2a, 2b. As a result, although the label L stops momentarily due to friction with the guide member 11, immediately after that, it is pushed from behind by the engaging claw 41 and moves forward together with it. Vacuum pressure is then introduced into the land portions 2a and 2b again, and the label L is attracted onto the label holding member 2, released from the engaging claw 41, and then coated with glue and affixed to the container.

As described above, in each of the above embodiments, the engaging claws 21, 41 of the positioning mechanisms 20, 40,
The holding position of the label L on the label holding member 2 is directly corrected so that the label L is always adsorbed and held at a fixed position on the label holding member 2. Therefore, the label L is always affixed to the container in the same state, and the affixing position is accurate.

In addition, although each of the above-mentioned embodiments processes roll labels, it goes without saying that the present invention can also be applied to an apparatus that affixes ordinary labels that have been cut in advance.

As described above, according to the present invention, the transfer drum is rotatably supported by a fixed frame and has suction holes in its outer circumferential surface, and a vacuum force is generated in the suction holes to suction and hold the label. In a labeling device that transfers the label while rotating and affixes it to a container,
The drum is provided with a vacuum open area in the middle of the vacuum generating area, and a guide plate is provided on the outside of the drum to face the open area and hold the label in the open area, and near the guide plate. A rotating body that rotates in synchronization with the rotation of the drum, an engaging pawl that is swingably supported on the rotating body, and a rotating body that swings the engaging pawl when the engaging pawl approaches the drum. Since the positioning mechanism is arranged outside the drum, the positioning mechanism includes an engaging claw biasing mechanism that corrects the label holding position by biasing and engaging contact with the edge of the label in the open area. The holding position of the label on the label holding member can be directly corrected, and the label affixing position on the container can be made accurate. Moreover, since the positioning mechanism with the engaging pawl is provided on the outside of the drum, the drum modification is required compared to the case where the positioning mechanism is installed inside the drum where the vacuum generation mechanism, etc. is already installed. The positioning mechanism itself can be integrated into a single unit mechanism that is structurally simpler, and the maintenance and inspection work of the entire label position correction mechanism is facilitated. It has an effect that can be easily imparted.

[Brief explanation of the drawing]

1 and 2 both show a positioning mechanism according to an embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a sectional view of the main part, and FIGS. 3 and 4 are: Both show positioning mechanisms according to other embodiments of the present invention, with FIG. 3 being a plan view and FIG. 4 being a sectional view of the main parts. 1... Transfer drum, 2... Label holding member, 2
0, 40... Positioning mechanism, 21, 41... Engaging claw, L... Label.

Claims (1)

[Scope of utility model registration request] A transfer drum is rotatably supported by a fixed frame and has suction holes on its outer circumferential surface, and a vacuum force is generated in the suction holes to suction and hold the label, and the label is transferred while rotating to form a container. In the label pasting device for pasting labels, the drum is provided with a vacuum open area in the middle of the vacuum generating area, and
A guide plate is provided on the outside of the drum to face the open area and maintain the label position in the open area, and near the guide plate is a rotating body that rotates in synchronization with the rotation of the drum. An engaging claw is swingably supported, and when the engaging claw rotates toward the drum, the engaging claw is oscillated and brought into engagement contact with the edge of the label in the open area, so that the label is held at the label holding position. A label pasting device characterized in that a positioning mechanism comprising an engaging pawl biasing mechanism for correcting the position is disposed on the outside of the drum.