JPH05262339A - Labeling machine - Google Patents

Abstract

PURPOSE:To simply rotate a vessel without necessity of control of revolution, by rotatably supporting a couple of upper and lower holding devices supporting the vessel at the upper and lower parts at the periphery of a rotary keeping and rotating the vessel and arranging a curved groove cam rail facing to the holding device and swinging the respective holding devices all along the sticking area of labels. CONSTITUTION:Labels L are sucked on a sticking drum 20 to transfer to the sticking position. A vessel 60 is fed to a rotary composed of upper and lower circular disks 12, 13 and the upper and lower ends of the vessel are retained by a couple of upper and lower holders 30, 40 to transfer together with the upper and lower disks 12, 13 to the sticking position. In the end where the upper and lower holders 30, 40 are not fixed, swing rollers 37, 44 are fitted in curved groove cam rails 51, 54 and hence, the swing of rollers is limited to revolve. And the rollers swing to the curved wall 70 side at the nearby spot of the curved wall 70 of the sticking position to rotate the vessel 60 with pushing it on the curved wall 70. In this time, the label L of the sticking drum 20 is stuck on the vessel 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a labeling machine for revolving a container while revolving the container and applying a label on the peripheral surface of the container.

[0002]

2. Description of the Related Art When a label is attached to a container, if the rotation speed of the container is lower than the rotation speed of an application drum, wrinkles will occur on the applied label. On the contrary, if the rotation speed of the container is faster than the rotation speed of the application drum, the label is likely to break. Therefore, conventionally, the rotation of each container is controlled at the same speed as the rotation speed of the application drum to prevent wrinkles from being generated on the label.

[0003]

[Problems to be Solved by the Invention] The conventional label sticking techniques have problems such as stickiness.

<B> As a means for forcibly applying a rotation force to a container, conventionally, a combination of various gear mechanisms is adopted to apply a rotation force to one of the grasping tools for grasping the container up and down. Therefore, the structure and mechanism for rotating the container are complicated.

<B> It is necessary to control the rotation of the container according to the rotation of the sticking drum, but it is technically difficult to control the rotation speed of the container.

<C> Up to now, when the starting end of the label is adhered to the peripheral surface of the container, the distance between the container and the application drum is the shortest, and the transition is such that the container is gradually separated from the application drum. Therefore, when the rear part of the label separates from the application drum in a state where the container and the application drum are separated from each other, there is no member supporting the rear part of the label, and therefore the label is easily inclined and applied due to its own weight. In the case of a full-wrap label, this causes a vertical shift in the label wrap portion.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a labeling machine which can easily rotate a container and does not require control of the rotation speed of the container. To provide.

[0008]

That is, the present invention comprises a rotary for gripping and rotating a plurality of containers, a pair of upper and lower gripping devices for gripping and opening the upper and lower parts of the containers at the periphery of the rotary, and a sticking drum. Then, in a labeling machine that rotates the container at least over the label sticking section and continuously sticks the label on the peripheral surface of the container, a plurality of gripping devices are pivotally supported on the peripheral edge of the rotary via a spindle. The labeling machine is characterized in that a curved grooved cam rail is arranged facing the gripping device, and each gripping device swings in accordance with the shape of the grooved cam rail over a label sticking section.

[0009]

The present invention will be described below with reference to the drawings.

<B> Basic Configuration FIG. 1 is a plan view of a labeling machine according to the present invention. This labeling machine basically comprises a rotary 10 and a sticking drum 20.

<B> Rotary The rotary 10 has a pair of rotary plates 12 and 13 which rotate at the same speed on the same axis of the shaft 11, and a plurality of lower gripping devices 30 and 40 mounted on the rotary plates 12 and 13, respectively.

<C> Rotating Plates A plurality of escape grooves 14 are formed in the peripheral portions of the rotating plates 12 and 13 at positions aligned with each other.

<D> Upper gripping device An upper gripping device 30 is disposed so as to be vertically movable and swingable on the upstream side of each of the escape grooves 14 on the peripheral edge of the upper rotary plate 12. As shown in FIGS.
A swing shaft 32 swinging around a support shaft 31 penetrating therethrough and a horizontal member 33 connected to the upper part of the support shaft 31 in the direction of the center of the upper rotary plate 12 are provided. An elevating roller 34 is provided on an end surface of the horizontal member 33, and an auxiliary shaft 35 is connected to the other end of the horizontal member 33 so as to pass through the upper rotary plate 12. Horizontal member 33 and swing shaft 3
The two are connected by a connecting member 36. Upper rotating plate 1
The second relief connection 14 is a swing shaft 32 that swings around the support shaft 31.
It is important that the shape allows the entry and exit of the. A swing roller 37 is provided above the swing shaft 32, and
An idle type upper chuck 39 is provided at the lower part of 2 through a spring 38 to allow it to ascend and descend a certain distance. The cam rail 50 that engages with the elevating roller 34 and moves the upper gripping device 30 up and down is disposed above the upper rotating plate 12 shown in FIG. The shape is set so that it rises in the section where the container 60 is received and discharged on the rotary 10 and falls in the other sections. Further, the grooved cam rail 51 that engages with the swing roller 37 of FIGS. 2 and 3 to swing the lifting shaft 32 is disposed substantially outside the cam rail 50 and concentrically with the cam rail 50, as shown by the alternate long and short dash line in FIG. It is composed of a continuous body of the circular portion 52 and the curved portion 53 that is curved inward over the front and rear sections where the container 60 comes closest to the sticking drum 20.
The bending center of the bending portion 53 is set to be substantially equal to the rotation center of the sticking drum 20.

<E> Lower gripping device A lower gripping device 40 is swingably arranged on the upstream side of each of the escape grooves 14 on the peripheral edge of the lower rotary plate 13. As shown in FIGS. 2 and 4, the lower grip device 40 includes a swing shaft 42 that swings around a support shaft 41 that penetrates the rotary plate 13, and a horizontal member 43 that horizontally connects the shafts 41 and 42. To have. Swing shaft 42
An oscillating roller 44 is provided in the lower part of the above, and an idle type lower chuck 45 is provided in the upper part of the oscillating shaft 42. The groove cam rail 54 that engages with the rocking roller 44 in FIGS. It is arranged. In this way, the groove cam rails 51, 5
The reason why 4 is curved inward over the sticking section of the label L is that the container 60 is forcibly rotated by utilizing the rotational force of the sticking drum 20. The lower chuck 45 may be lowered to the delivery section of the container 60 using a known cam mechanism or the like.

<F> Sticking Means The sticking drum 20 is a well-known negative pressure suction type rotary drum, which has a large number of suction holes on its circumferential surface and extends over a section from receiving the label L to sticking it on the container 60. A negative pressure is generated in the suction holes on the peripheral surface. The curved wall 70 shown in FIGS. 1 and 2 is a label L on the container 60 between the peripheral surface of the sticking drum 20 and the curved surface 70.
Is a wall body around which the rotary drum 10 is fixed on the side of the rotary 10 facing the pasting drum 20. The center of curvature of the curved wall 70 is set equal to the center of rotation of the sticking drum 20, and the facing distance to the sticking drum 20 is set to be substantially equal to the diameter of the container 60. More preferably, the inner surface of the curved wall 70 may be coated with a soft resin such as sponge. When the diameter of the container 60 is changed, the curved wall 70 is slid according to the diameter of the container 60.

[0016]

Next, the operation of the labeling machine will be described.

<A> Supply of Label As shown in FIG. 1, the tape L is drawn by a pair of drawing rollers 80 and cut by a cutter device 81 to a predetermined length to manufacture a label L. The label L is adsorbed on the peripheral surface of the sticking drum 20 and continues to be transferred toward the rotary 10. Label L
Is pasted on the back surface of the pasting drum 82 when passing through the pasting drum 82 arranged near the pasting drum 20. As the label L, paper, a resin sheet, a heat shrinkable resin sheet, a tack label, a heat sensitive label or the like can be used, and a known adhesive such as starch or hot melt can be used for gluing.

<B> Supply of Container The container 6 supplied from the carry-in passage 83 toward the rotary 10.
0 is taken into the concave portion of the peripheral surface of the star-shaped carry-in star 84 and is transferred toward the rotary 10. The container 60 meets the pair of upper and lower gripping devices 30 and 40 of the rotary 10, grips the upper and lower parts thereof, and is transferred to the sticking drum 20. As shown in FIG. 2, each of the gripping devices 30, 40 has a swinging roller 37, 44 with a groove 52, a circular portion 52 of a cam rail 51, 54.
And continues to revolve with the swing restrained.

<C> Labeling Each gripping device 30, 4 that engages with the grooved cam rails 51, 54.
When 0 reaches the bending portion 53, 30, 40 of each gripping device
The swing rollers 37 and 44 swing along the shape of the curved portion 53. FIG. 5 shows an operation trace of each of the swing rollers 37 and 44 when passing through the bending portion 53 by a chain line. During this time, the start end of the label L and the peripheral surface of the container 60 meet and the sticking is started. The container 60 revolves around the section where the swing rollers 37 and 44 of the gripping devices 30 and 40 pass through the curved portion 53 while contacting the peripheral surface of the sticking drum 20 and revolving.
From 0, it receives a rotating force and rotates. Since the rotating container 60 and the peripheral speed of the sticking drum 20 are equal,
The label L is attached to the peripheral surface of the container 60 while being pressed by the curved wall 70 and without wrinkles. Further, since the container 60 and the sticking drum 20 rotate at the same rotational speed, the label L is always sandwiched between the circumferential surfaces of the container 60 and the sticking drum 20 even if the container 60 revolves. .. The swinging movement of the swinging shafts 32, 42 in the above-mentioned label L sticking section is performed by the swinging shafts 32, 42 shown in FIG.
It is allowed by going in and out of the escape grooves 14 of 2 and 13. Therefore, when the swing rollers 37, 44 of the gripping devices 30, 40 reach the circular portion 52 again via the curved portion 53, the swinging of the gripping devices 30, 40 is restricted.

<D> Discharge of Container The container 60 having the label L attached thereon is transferred to the carry-out star 85 by the rotary 20, and at the moment when the upper and lower grips of the container 60 are released, the carry-out star 85 is removed from the rotary 20. It is delivered to the peripheral surface, and further, from the carry-out star 85 to the carry-out path 8
It is carried out to 6.

<E> Correspondence method of different diameter containers When the label L is attached to the containers 60 having different diameters, the curved wall 70 is slid according to the diameter of the container 60 and the curved portions of the grooved cam rails 51 and 54 are arranged. It can be dealt with by replacing only 53. As another method, a method of replacing the sticking drum 20 with a different diameter may be considered.

[0022]

Since the present invention is as described above, the following effects can be obtained.

<B> Since the gripping device for gripping the upper and lower sides of the container is configured to be swingable, it is possible to apply a rotation force to the container by utilizing the rotational force of the sticking drum. for that reason,
A complicated mechanism for mechanically rotating the gripping device as in the related art is unnecessary, and the structure can be greatly simplified.

<B> Since the container comes into contact with the peripheral surface of the sticking drum and receives the rotational force, the rotation speed of the container is always equal to the rotation speed of the sticking drum. Therefore, it is not necessary to control the rotation speed of the container according to the rotation speed of the application drum.

<C> Since the label is always applied in a state of being pressed against the peripheral surface of the application drum and the container, no matter how long the label is, the rear of the label does not tilt during the application. Therefore, even if the label is wound all around, the label can be attached neatly without any deviation in the lap portion of the label.

[Brief description of drawings]

1 is a plan view of a labeling machine

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view of an upper gripping device.

FIG. 4 is a perspective view of a lower grip device.

FIG. 5 is a partially enlarged view for explaining a label attachment state.

Claims (1)

[Claims] 1. A rotary machine for gripping and rotating a plurality of containers, a pair of upper and lower gripping devices for gripping and opening the upper and lower parts of the containers at the periphery of the rotary, and a sticking drum, and a label at least in a sticking section of the label. In a labeling machine that rotates a container around itself and continuously affixes labels to the peripheral surface of the container, a plurality of gripping devices are pivotally supported on a peripheral portion of a rotary via a support shaft, and are curved so as to face the gripping device. A labeling machine, wherein a groove cam rail is provided, and each gripping device engages with the groove cam rail so as to be swingable over a label sticking section.