JP4116685B2 - Label unwinding device for labeling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a label unwinding device for a label sticking machine, and more particularly to a label unwinding device for a label sticking machine for continuously sticking a label to an object to be stuck.
[0002]
[Prior art]
A label unwinding device of a conventional label sticking machine will be outlined with reference to FIG.
FIG. 6 is a schematic side view of a conventional label applicator 1, which includes a label supply unit 2, a label unwinding device 3, a printing unit 4, a label peeling member 5, and a label applying member. 6 and a mount winding unit 7.
[0003]
The label supply unit 2 can hold a continuous label body 10 in which a plurality of label pieces 9 are temporarily attached to a belt-like mount 8 in a roll shape, and can unwind the continuous label body 10 in a belt shape.
The label supply unit 2 includes an upright supply frame 11, a supply shaft 12 that is rotatably attached to the supply frame 11, and a supply reel 13 that supports the side surface of the roll-shaped label continuous body 10.
[0004]
The label unwinding device 3 includes a tension lever 14, a tension roller 15 extending in the width direction of the label continuous body 10 at a right angle to the tension lever 14, and a lever rotating shaft 16 around which the tension lever 14 is rotatable. And a coil spring 17.
The tension roller 15 guides the label continuum 10, and the urging force of the coil spring 17 urges the label continuum 10 in the direction of the label supply unit 2, thereby increasing the upstream tension when the label continuum 10 is unwound. It can be applied.
[0005]
The printing unit 4 is provided if necessary, and prints predetermined information on the label piece 9 by a stamp, thermal transfer, or any other printing mechanism.
[0006]
The label peeling member 5 peels the label piece 9 from the mount 8 of the label continuous body 10 by pulling the mount 8 downstream by the mount take-up unit 7.
[0007]
The label applying member 6 attaches the peeled label piece 9 to a predetermined object 19 that is continuously conveyed by a conveying mechanism 18 such as a conveyor.
[0008]
The mount winding unit 7 includes a winding shaft 20 and a drive motor 21 that rotationally drives the winding shaft 20 and intermittently winds the mount 8 at a predetermined pitch.
[0009]
In the label applicator 1 and the label unwinding device 3 configured as described above, a sensor (not shown) is used when the object to be applied 19 conveyed by the conveyance mechanism 18 reaches the position of the label peeling member 5 or the label applying member 6. ), And the drive motor 21 of the mount take-up unit 7 is driven to pull the mount 8 by a predetermined pitch, and the label strip 9 is peeled off by the label peeling member 5, which is equivalent to the conveying speed of the object 19 to be stuck. At this speed, the label piece 19 is fed out and attached to the object 19 by the label attaching member 6.
[0010]
When the mount 8 is pulled in the downstream direction of the mount 8, that is, when the label piece 9 is peeled off, the tension lever 14 counters the urging force of the coil spring 17 around the lever rotation shaft 16. The sheet is rotated in the clockwise direction, and can be unwound in a state where it is stretched with a predetermined tension while giving resistance to the label continuous body 10 in the direction of the label supply unit 2 (upstream direction).
[0011]
After the label piece 9 is peeled off, the operation of the drive motor 21 is stopped to stop the pulling of the label continuous body 10, and the next object to be stuck 19 is moved to the label peeling member 5 or the label sticking member 6 by the transport mechanism 18. It is conveyed to the position and the above-described peeling and pasting operations are repeated.
[0012]
However, the torque required for unwinding varies between the initial stage when the roll diameter of the label continuous body 10 in the label supply unit 2 is large and the latter stage when the roll diameter is small. On the other hand, the resistance torque applied to the label continuous body 10 by the label unwinding device 3 via the tension lever 14 and the tension roller 15 is a constant torque by the coil spring 17.
That is, in the label applicator 1, the drive motor 21 of the mount winding unit 7 is selected so that the label continuous body 10 can be pulled out in the initial stage when the roll diameter is large. However, since the initial drive torque is large, the roll diameter When the intermittent label continuum 10 is pulled and stopped as described above in the latter period when the label becomes small, the label continuum 10 moves in the direction of the label peeling member 5 due to inertia when the drive motor 21 stops. The loosening of the wind will occur and sag.
[0013]
Such unwinding phenomenon has problems such as a shift of the stop position of the label continuous body 10 or the label piece 9 in the label peeling member 5 or the label applying member 6, and thus a deviation of the applying position to the object 19 to be applied. In an extreme case, there is a problem that the peeling action of the label piece 9 in the label peeling member 5 is not performed.
[0014]
When the transport speed of the transport mechanism 18 and the pulling speed of the drive motor 21 corresponding thereto are low, the above problem does not appear greatly, but the transport speed of the transport mechanism 18 and the unwinding speed of the label continuous body 10 are large. Then, the problem of the above-mentioned loosening of the winding becomes obvious, and there is a problem that the sticking efficiency of the label piece 9 cannot be increased.
[0015]
[Problems to be solved by the invention]
The present invention has been considered in view of the above problems, and an object of the present invention is to provide a label unwinding device for a label applicator capable of accurately attaching a label piece to an object to be applied at a high speed.
[0016]
Another object of the present invention is to provide a label unwinding device for a label sticking machine that can stably perform the unwinding operation of the label continuous body from the label supply unit even by intermittent transfer of the label continuous body. To do.
[0017]
Another object of the present invention is to provide a label unwinding device for a label applicator that prevents the unwinding phenomenon from the label supply section of the label continuum even when the label continuum is intermittently transferred.
[0018]
It is another object of the present invention to provide a label unwinding device for a label applicator that can immediately stop unwinding of the label continuous body from the label supply unit when the transfer of the label continuous body is stopped.
[0019]
Further, the present invention provides a label unwinding machine for a label sticking machine that can always apply a predetermined tension with no excess or deficiency to the label continuum, and can ensure the peeling action of the label strip from the mount in the label peeling member. It is an object to provide an apparatus.
[0020]
[Means for Solving the Problems]
That is, the present invention uses the movement (rotation) of the tension lever when the label continuous body is pulled and when the tension is stopped as a kind of sensor, and the label continuous body is supplied and stopped by the movement of the tension lever. In addition to holding the label continuous body in which a plurality of label pieces are temporarily attached to a belt-like mount in the form of a roll, A label supply unit capable of unwinding the label continuum in a strip shape, a label peeling member for peeling the label piece from the mount of the label continuum unwound from the label supply unit, and the peeled label piece A label unwinding device for a label affixing machine having a label affixing member to be affixed to a predetermined object to be applied, and a mount take-up unit for winding the mount A tension lever capable of guiding the label continuous body between the label supply unit and the label peeling member and biasing the label continuous body toward the label supply unit; and a position of the tension lever A label unwinding device for a label applicator, comprising: a braking mechanism capable of braking or unwinding the unwinding of the label continuous body from the label supply unit.
[0021]
The brake mechanism includes a belt member that is wound around a supply shaft of the label supply unit, a first belt state that can prevent unwinding of the label continuous body from the supply shaft, The belt member can be driven between the second belt state in which the label continuous body can be unwound.
[0022]
The brake mechanism includes a belt member wound around a supply shaft of the label supply unit, a balancer in which one end portion of the belt member and a lever rotation shaft of the tension lever are eccentrically fixed to each other, and the belt And a biasing member that biases the balancer so as to brake the unwinding of the label continuum from the label supply unit.
[0023]
The tension lever can be rotated around the lever rotation shaft as the mount winding unit is driven to move to a first lever position and a second lever position different from the first lever position. In addition, the brake mechanism brakes the label supply unit at the first lever position, and the brake mechanism can release the brake to the label supply unit at the second lever position.
[0024]
The belt member may have different frictional resistances on the front surface and the back surface thereof.
[0025]
In the label unwinding device of the label applicator according to the present invention, the braking mechanism moves in accordance with the supply and stop of the label continuous body of the label supply unit by the movement of the tension lever when the label continuous body is pulled and when the tension is stopped. Since the brake release and the brake are respectively performed, the supply of the label continuum can be stopped in particular, and the unwinding phenomenon of the label continuum from the label supply unit due to inertia can be solved.
[0026]
That is, the braking mechanism can brake the unwinding of the label continuous body from the label supply unit according to the position of the tension lever, and can prevent the unwinding of the label continuous body when the supply of the label continuous body is stopped.
Also, when the label continuum is pulled downstream and the label continuum needs to be unwound, the tension lever that guides the label continuum moves, and the braking mechanism can release its braking function. The label continuum can be unwound in the direction of the label peeling member by a required length.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Next, a label unwinding device 30 of a label applicator according to an embodiment of the present invention will be described with reference to FIGS. However, the structure of the label applicator itself is the same as that of the conventional label applicator 1 (FIG. 6), and the same parts as those in FIG.
1 is an exploded perspective view of the label supply unit 2 and the tension lever 14 portion, FIG. 2 is an exploded perspective view of the label unwinding device 30 of the label applicator as seen from the side opposite to FIG. 1, and FIG. It is a side view of the label unwinding apparatus 30 of the label sticking machine seen from the transfer direction of the label continuous body.
[0028]
As shown in FIG. 1, the supply shaft 12 is rotatably attached to a supply shaft housing 31 attached to the supply frame 11 via a bearing 32. The label boss 33 is fixed to the tip end portion (one end portion) of the supply shaft 12, and the label continuous body 10 is rotatably held. In addition, one supply reel 13 (the supply reel 13 for attachment / detachment on the left side in the drawing) and the auxiliary boss 34 integrated therewith are detachably attached to the supply shaft 12 and the label boss 33 to hold the side surface of the label continuous body 10.
The other end of the supply shaft 12 faces the supply frame 11.
[0029]
The lever rotating shaft 16 of the tension lever 14 is rotatably attached to the supply frame 11 via a bearing 35, and its end faces the inside of the supply frame 11.
[0030]
As particularly shown in FIG. 2, the label unwinding device 30 of the label sticking machine includes a tension lever 14, a tension roller 15, a lever rotating shaft 16, and a braking mechanism 36.
[0031]
The brake mechanism 36 applies or brakes the unwinding of the label continuous body 10 from the label supply unit 2 according to the position of the tension lever 14, and releases the brake pulley 37, the belt member 38, the belt It has a flange 39, a balancer 40, and a coil spring 41 (biasing member).
[0032]
The brake pulley 37 is fixed to the end of the supply shaft 12 in the supply frame 11, the belt member 38 is hung around the peripheral surface, and a belt flange 39 is attached so that the belt member 38 is not detached.
[0033]
The front surface 38A (one surface) and the back surface 38B (the other surface) of the belt member 38 have different frictional resistances.
For example, the material of the surface 38A is polyurethane or other rubber material, which has a large frictional force and is used on the side in contact with the brake pulley 37 when the pitch of the label pieces 9 is as large as 80 mm or more. The material of the back surface 38B is polyester or the like and has a small frictional force, and is used when the pitch of the label pieces 9 is as small as less than 80 mm.
[0034]
4 is a rear view of the brake mechanism 36 as viewed from the back side of the label supply unit 2, and FIG. 5 is a front view of the label unwinding device 30 of the label applicator as viewed from the label supply unit 2 side. 40, one end portion 38C of the belt member 38 is decentered with respect to the lever rotating shaft 16 of the tension lever 14 via the belt mounting bolt 42 and the tension housing 43 and the pair of bearings 44. It is fixed.
By arbitrarily setting the length E of the eccentric arm, it is possible to select the degree of slack of the belt member 38 as the tension lever 14 rotates or the degree of contact frictional force between the brake pulley 37 and the belt member 38. is there.
[0035]
The coil spring 41 is attached between one end 38 </ b> C (belt attachment bolt 42) of the belt member 38 and the spring attachment bolt 45.
The other end 38D of the belt member 38 is fixed to the supply frame 11 by the belt mounting bolt 46 so that the balancer 40 can be urged, and the belt member 38 unwinds the label continuous body 10 from the label supply unit 2. To brake. However, the biasing force of the coil spring 41 is set smaller than the pulling force of the mount 8 by the drive motor 21.
[0036]
In the label unwinding device 30 of the label sticking machine having such a configuration, as shown in FIG. 5 in particular, the tension lever 14 rotates around the lever rotating shaft 16 as the mount winding unit 7 is driven, The first lever position L1 and the second lever position L2 different from the first lever position L1 are movable.
[0037]
The first lever position L1 is a so-called initial stop position where the entire label sticking machine 1 is stopped or the label continuous body 10 is not transferred, and is set to a single position.
The second lever position L2 is a position where the tension roller 15 has moved counterclockwise in FIG. 5 with the unwinding of the label continuous body 10 or with the change in the roll shape of the label continuous body 10.
At the first lever position L1, the brake mechanism 36 brakes the label supply unit 2, and at the second lever position L2, the brake mechanism 36 releases the brake to the label supply unit 2.
[0038]
That is, when the object 19 to be pasted on the transport mechanism 18 reaches the portion of the label peeling member 5, when the drive motor 21 of the mount winding unit 7 operates to pull the mount 8 downstream, the label peeling member 5 At the portion, the label piece 9 is peeled off from the mount 8, and the tension lever 14 rotates counterclockwise in FIG. 5 against the urging force of the coil spring 41, so that the second lever from the first lever position L1. Move to position L2.
[0039]
The turning movement of the tension lever 14 is transmitted to the balancer 40 via the lever turning shaft 16, and the balancer 40 also turns counterclockwise in FIG. 5, and the belt member 38 is rotated counterclockwise around the brake pulley 37. Move in the direction to reduce the contact force between them.
That is, the belt member 38 has a first belt state B1 that can prevent unwinding of the continuous label body 10 from the supply shaft 12 (so-called pinned state, solid line in the figure), and a continuous label body from the supply shaft 12. Transition is made between a second belt state B2 (so-called sagging state, imaginary line in the figure) that can realize 10 unwinding.
Therefore, in the second belt state B2 of the belt member 38, the supply shaft 12 integrated with the brake pulley 37 can be rotated by a predetermined angle, and the continuous label body 10 is unwound in a band shape at a predetermined pitch.
[0040]
When the drive motor 21 in the mount winding unit 7 is stopped and the transfer of the label continuous body 10 is stopped, the tension to the tension lever 14 by the label continuous body 10 disappears, so the tension lever 14 moves the lever rotating shaft 16 and the balancer 40. The belt member 38 is also restored to the contact position with the brake pulley 37 (first belt state B1) by the biasing force of the coil spring 41 via the restoring position (first lever position L1).
Therefore, the supply shaft 12 is braked by contact friction between the brake pulley 37 and the belt member 38, and the label continuum 10 can be prevented from unwinding to the downstream side due to inertia.
[0041]
Thereafter, the label continuum 10 is unwound from the label supply unit 2 by repeating the above-described operation, but the label continuum 10 is pulled at a predetermined pitch despite the intermittent movement of pulling and stopping in the mount winding unit 7. After unwinding reliably and unwinding by a predetermined pitch, braking can be applied immediately, and all the problems as in the conventional label unwinding device 3 can be solved.
[0042]
In addition, when the label continuous body 10 in which the pitch of the label pieces 9 is different is loaded, the belt member 38 and the brake pulley 37 are assembled by assembling the front surface 38A and the back surface 38B of the belt member 38 so that the front and back surfaces are exchanged. Different friction braking forces can be generated between the two.
[0043]
【The invention's effect】
As described above, according to the present invention, since the braking mechanism that operates according to the movement of the tension lever is provided, the label continuous body is unwound by the inertial action accompanying the unwinding of the label continuous body, and the label strip peeling position or The problem that the stop position is shifted can be solved, and even if the feeding speed of the label continuous body is increased, the stop position can be kept constant and the accuracy of the label application position with respect to the object to be applied can be maintained. .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a label supply unit 2 and a tension lever 14 related to a label unwinding device 30 of a label applicator according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the label unwinding device 30 of the label applicator as viewed from the opposite side to FIG.
FIG. 3 is a side view of the label unwinding device 30 of the label applicator as seen from the direction in which the label continuous body 10 is transferred.
FIG. 4 is a rear view of the brake mechanism 36 viewed from the back side of the label supply unit 2;
FIG. 5 is a front view of the label unwinding device 30 of the label applicator as seen from the label supply unit 2 side;
6 is a schematic side view of a conventional label applicator 1 and its label unwinding device 3. FIG.
[Explanation of symbols]
1 Labeling machine (Fig. 6)
DESCRIPTION OF SYMBOLS 2 Label supply part 3 Label unwinding apparatus 4 of label sticking machine 1 Printing part 5 Label peeling member 6 Label sticking member 7 Mount winding part 8 Band-like mount 9 Label piece 10 Label continuous body 11 Supply frame 12 Supply axis 13 Supply reel 14 Tension lever 15 Tension roller 16 Lever rotation shaft 17 Coil spring 18 Conveying mechanism such as conveyor 19 Object to be pasted (product)
20 winding shaft 21 drive motor 30 label unwinding device of label sticking machine (embodiment, FIG. 2)
31 Supply shaft housing 32 Bearing 33 Label boss 34 Auxiliary boss 35 Bearing 36 Brake mechanism 37 Brake pulley 38 Belt member 38A Surface (one surface) of belt member 38
38B The back surface (the other surface) of the belt member 38
38C One end 38D of the belt member 38 The other end 39 of the belt member 38 Belt flange 40 Balancer 41 Coil spring (biasing member)
42 Belt mounting bolt 43 Tension housing 44 Bearing 45 Spring mounting bolt 46 Belt mounting bolt E The length of the eccentric arm between one end 38C of the belt member 38 and the lever rotating shaft 16 of the tension lever 14 (FIG. 5). )
L1 First lever position of tension lever 14 (FIG. 5)
L2 Second lever position of tension lever 14 (FIG. 5)
B1 First belt state of the belt member 38 (FIG. 5)
B2 Second belt state of belt member 38 (FIG. 5)

Claims (3)

A supply frame and a label boss that is rotatably attached to the supply frame, and a label boss is fixed to the tip, and a supply reel and an auxiliary boss integrated therewith are detachably attached to the label boss, and a plurality of label pieces are temporarily attached to a belt-like mount. While holding the side surface of the roll-shaped label continuum that is worn, the label continuum can be unwound in a strip shape, the supply shaft with the other end facing the inside of the supply frame,
A label peeling member for peeling a label piece from the mount of the label continuum unwound from the supply shaft;
A tension lever that is rotatably attached to the supply frame and that guides the label continuous body between the supply shaft and the label peeling member with a tension roller is attached to the tip. A lever rotation shaft facing the inside of the frame;
A label affixing member for affixing the peeled label piece to a predetermined object,
A winding shaft for winding the mount, and a label unwinding device of a label sticking machine,
A belt-like belt member having ends at both ends;
A circular brake pulley having a peripheral surface that is attached to the other end of the supply shaft in the supply frame, and has a peripheral surface around which the belt member is wound,
A balancer that is attached eccentrically to the other end of the lever rotation shaft in the supply frame and that can be attached to one end of the belt member by a belt mounting bolt;
A coil spring that is attached to the belt mounting bolt of the balancer and a spring mounting bolt formed in the supply frame, and biases the tension lever to the upstream side in the transport direction via the balancer;
A bolt for attaching the end of the belt member different from that attached to the balancer into the supply frame;
When the belt member is attached to the balancer with the belt attaching bolt and is hung on the peripheral surface of the brake pulley, and the end of the belt member attached to the balancer is attached with the bolt, the coil spring The belt member urges the peripheral surface of the brake pulley by the urging force, and brakes the rotation of the supply shaft,
When the tension lever rotates about the lever rotation shaft against the urging force of the coil spring as the winding shaft is driven, the balancer rotates and hangs on the peripheral surface of the brake pulley. A label unwinding device for a label applicator, wherein the belt member is in a sagging state, the biasing of the belt member and the brake pulley is released, and the supply shaft is rotatable. 2. The belt member according to claim 1, wherein the frictional resistance of the front surface and the back surface of the belt member is different from each other, the front surface is made of rubber and has a large frictional force, and the back surface is made of polyester and the frictional force is smaller than the surface. Label unwinding device for the labeling machine described. The label unwinding device for a label sticking machine according to claim 1, wherein the coil spring sets an urging force to be smaller than a pulling force of the mount by driving the winding shaft .

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