JPH047913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for transferring printed characters onto a large number of labels adhesively held at regular intervals on a tape-shaped backing paper. This device transfers printed characters one after another to specified locations on each label while intermittently transporting the backing paper at a constant pitch in its longitudinal direction.

(Prior art) As shown in Fig. 6, a large number of labels 2, 2... are adhered to a tape-shaped mount 1 at equal intervals, and each label 2, 2 is mechanically peeled off from the mount 1 while the product is being sold. They offer something you can stick on and go with.
Although the product name, store, etc. are printed on the label 2 in advance, the date of manufacture of the product, etc. must be displayed using a printing device immediately before the label is attached to the product. Therefore, it is necessary to intermittently transport and supply the entire mount 1 toward the printing device at the same pitch as the adhesive interval P of the labels. This conveyance of the mount requires precision in order to accurately transfer the print within the specified narrow frame 3 on the label. Therefore, conventionally, a rod 4 with a sharp tip is reciprocated back and forth, the label 2 is hooked on the tip of the rod 4, and each label 2, 2... and the mount 1 are intermittently conveyed one by one as one unit. That's what I do. However, with such a conveying means, the mount 1 tends to become slack, which causes trouble. That is, the mount 1 only supports the labels 2, and the mount 1 is discarded after each label 2 is peeled off. Therefore, from an economical point of view, there is a tendency to use the material of the mount 1 as thin as possible. In other words, since there is a tendency to use a stiff backing paper 1, the backing paper 1 becomes slack when it is conveyed by being pushed by the rod 4, and a slight misalignment between the frame 3 and the transferred print tends to occur. Furthermore, in order to increase the printing transfer efficiency, the rod 4
If the reciprocating movement of is made faster, the impact on the mount 1 will become larger, and the sag of the mount will become larger. For this reason, efficiency cannot be increased. Moreover, the rod 4 engages with the label 2 to restrict unnecessary movement of the mount 1 while the print is transferred to the label 2, and after the print transfer is completed, the rod 4 moves back and moves to the work of conveying the mount. For,
It has the disadvantage of being less efficient.

(Problems to be Solved by the Invention) In view of the above-mentioned points, an object of the present invention is to increase the conveyance speed and improve the print transfer efficiency even when using a thin mount.

(Means for Solving the Problem) In order to achieve the above object, the present invention intermittently conveys the mount by intermittent rotation of pinch rolls at the same pitch as the interval between the front and rear labels adhered thereto. In a device in which a printing machine installed in front of the pinch roll transfers printing onto each label, if the backing paper becomes slack in front of the printing machine, the backing paper is moved in the opposite direction to the conveying direction. A mount biasing mechanism that urges the mount back in a direction, and while the mount is being conveyed, the printing machine and the pinch roll contact the surface of the mount to cause the mount to meander, and the conveyance of the mount is stopped. At the same time, a mount serpentine mechanism that separates from the mount to form slack in the mount, and a mount that contacts the label adhesive surface of the mount between the printing machine and the mount serpentine mechanism and in the direction in which the mount is conveyed. A non-return claw is provided which engages the trailing edge of the label when the backing paper is pulled back in the opposite direction to the conveyance direction due to slippage between each label.

Therefore, the present invention also has a mount serpentine bending mechanism.
While the mount is conveyed, the mount contacts the surface of the mount and makes the mount meander, and when the mount stops being conveyed, it separates from the mount to form slack in the mount, and this slack is provided at the front of the printing machine. The biasing mechanism can also absorb the pressure, so that the backing paper is automatically pulled back in the opposite direction to the transport direction, and the backing of the backing paper is stopped at the position where the trailing edge of the label engages with the non-return pawl. In other words, the position of the mount is corrected so that the label is directly below the printing machine. More specifically, the mount is conveyed using a pinch roll so that it goes a little too far, and then it is moved back by the amount of overshoot to correct the position of the printing machine and the label. Therefore, the mount is not pressed as in the conventional case, but both the conveying action and the retreating action are performed by tension, so even if the mount is thin, it is difficult for printing to be misaligned due to slack. Moreover, since the conveyance of the mount is carried out by the rotational power of the pinch rolls in one direction, there is no loss of movement and the speed can be increased.

(Embodiment) Two reels 11 and 12 are supported on the upper surface of the machine base 10 via bearings 13 and 14, and several guides are provided on the vertical surface of the machine base 10 between these two reels 11 and 12. Roll 15, 16, 17, 1
8 and 19 are rotatably provided, and the tape-shaped mount A supported on the unwinding reel 11 on one side is wound up by the take-up reel 12 on the other side along each of the guide rolls 15 to 19.

In addition, the base 2 below the conveyance track of the mount A
1 and a printing head 23 connected to a crank mechanism 22 in the above region form a printing machine 24.

Furthermore, a mount biasing mechanism 25 is provided in front of the printing machine 24 in the direction in which the mount A is conveyed.
This is formed by rotatably providing a roller 28 at the tip of a vertically swingable lever 27 which is supported on the machine base via a pin 26, and the roller 28 is brought into contact with the upper surface of the mount A. . Therefore, due to the weight, a force is exerted to push down the mount A between the front and rear guide rolls 17 and 18, and in some cases, the force of the spring 29 may be used to assist the force. good.

Furthermore, a check claw 30 and a rechargeable sensor 3 are provided at the rear of the printing machine 24 in the direction of conveyance of the mount A.
3. A mount meandering mechanism 34, a pinch roll 42, and a dancer roll 45 are provided in this order.

The check claw 30 is connected to a pin 31 as shown in FIG.
The release end is supported on the machine stand so that it can freely move up and down around The label B is configured to engage with the trailing edge of the label B during the backward movement Y of the label B.

The mount meandering mechanism 34 rotatably supports the roll 37 on an eccentric shaft 36 at one end of a driven shaft 35 which is supported on the machine mount 10, as shown in FIG.
The other end of the driven shaft 35 is connected to a drive shaft 39 through a chain 38, and the drive shaft 39 is connected to an electric motor 41 through an electromagnetic clutch 40 with a brake (see FIG. 1).

On the other hand, the pinch roll 42 is connected to an electric motor 41 via a chain 43 and an electromagnetic clutch 44 with a brake, and the two electromagnetic clutches 40 and 44 are in electrical contact with the front sensor 33. ing.

(Operation) Fig. 1 will be explained. When the starting switch (not shown) is closed, the clutch 44 on one side is engaged and the electric motor 41 begins to rotate continuously. Therefore, the pinch rolls 42 are activated and begin to convey the mount A. In this case, the roll 37 of the mount meandering mechanism 34 is stopped at the position shown in the figure, and the mount A is held down and meandered between the two front and rear rolls 19, 42. When the sensor 33 detects that the label adhered to the top surface of the mount A has passed, the electromagnetic clutch 44 on one side is released from engagement in response to a command from the sensor 33, and the conveying action of the mount A is stopped. . On the other hand, in contrast to the clutch 44 on one side, the electromagnetic clutch 40 on the other side rotates the axis of the interlocking mount meandering mechanism 34 in response to a command from the sensor 33. As a result, as shown in FIG. 2, the roller 37 separates from the mount A and releases the pressing force against the mount, creating slack in the mount. In contrast, the weight of the mount biasing mechanism 25 causes the printing Machine 24
Since mount A is pushed down in front of , mount A moves backward. In Figure 4, Y retreats together with mount A.
When the trailing edge of the label B comes into contact with the tip of the non-return claw 30, the retreating action of the mount A stops at that position. As previously set, the print head 23 immediately moves downward toward the base 21 and transfers the print onto the label via the carbon tape K.

When the printing transfer operation described above is completed, the roller 37 of the meandering mechanism 34 stops at the position shown in FIG. The sensor 33 detects the passage of the label and switches the two clutches 44 and 40, the energizing mechanism 25 moves the backing paper A, and the non-return claw 30 holds the label at the specified position. The process of stopping at a certain position and transferring the print is repeated.

The take-up reel 12 is slowly and continuously rotated by the power of the electric motor 41, and the mount A that is intermittently sent out from the pinch roll 42 is transferred to the dancer roll 45.
Wind it up while adjusting it.

Although the meandering mechanism 34 for the mount is shown as a crank type in FIG. 1, it may also be a mechanism in which the roller 37 is linearly reciprocated by the power of a solenoid 45, as shown in FIG. Can be formed. In the case of this embodiment, when the mount A is conveyed,
A portion of the mount is meandered by a roller 37, and when the clutch 44 is released, the roller 37 is lifted up by the energizing action of a solenoid 45. Furthermore, a printing machine that directly transfers ink without using carbon tape can also be used.

(Effects) As explained in the embodiments, the present invention uses the pinch roll to convey the backing paper until the transfer area of the label is slightly past the printer, and then uses the energizing mechanism to move the backing paper back and position the label. For small labels, the amount of backing of the backing paper is extremely small in millimeters, and as shown in Figure 6, there is less movement loss than when the backing paper is conveyed by reciprocating movement of the rod. It is small and efficient, and since the mount uses tensile force for both conveyance and retraction, there is no slack even with a thin mount, which reduces printing misalignment and increases speed. There is.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a partial functional explanatory diagram of the previous figure, FIG. 3 is a view taken along the - line in FIG. 1, and FIG. A partially enlarged view, FIG. 5 is an explanatory diagram of another embodiment, and FIG. 6 is an explanatory diagram of a conventional example. 11... Rewinding reel, 12... Winding reel,
23...Printing head, 24...Printing machine, 25...
Mount energizing mechanism, 30... Non-return claw, 34... Mount meandering mechanism, 40... Electromagnetic clutch, 41... Electric motor (power source), 42... Pinch roll, 44... Electromagnetic clutch (intermittently Elements that transmit power), 45...
... Solenoid, A... Mount, B... Label.

Claims (1)

[Claims] 1 A plurality of guide rolls are arranged to guide a band-shaped mount on which a large number of labels are adhered and held at regular intervals to form a transport track for the mount, and a pinch roll is provided to contact the mount on the track. , the pinch roll is connected to a power source through an element that transmits power intermittently, and the intermittent rotation of the pinch roll causes the mount to be intermittently conveyed at the same pitch as the spacing between the front and rear labels adhered thereto. However, in the installation in which the printing machine installed in front of the pinch roll transfers the print onto each label, if the backing paper becomes slack in the front part of the printing machine, the backing paper may be moved out of the direction of conveyance. While the mount is being conveyed, a mount biasing mechanism that energizes the mount to pull it back in the opposite direction contacts the surface of the mount and makes the mount meander between the printing machine and the pinch roll, so that the mount is not conveyed. A mount serpentine mechanism that separates from the mount to form slack in the mount at the same time as the mount stops, and a mount serpentine mechanism that contacts the label adhesive surface of the mount between the printing machine and the mount serpentine mechanism and extends in the direction in which the mount is conveyed. 1. A label printing device characterized by being provided with a non-return claw that engages with the trailing edge of the label when there is slippage between the labels and the mount is pulled back in a direction opposite to the conveying direction.