JPH0771798B2 - Rotary cutting device - Google Patents

Description

The present invention relates to a rotary cutting device used for a roll labeler or the like, and more particularly to a rotary cutting device including a rotary cutter and a backup roller.

"Prior Art" Conventionally, as a rotary cutting device, a rotary cutter and a backup roller, each of which is rotatably supported, and a pressing means for pressing the rotary cutter and the backup roller to each other are provided, and are pressed against each other. It is known that an object to be cut is passed between a rotary cutter and a backup roller and the object to be cut is cut by the rotary cutter.

[Problems to be Solved by the Invention] In this type of rotary cutting device, it is necessary to bring the rotary cutter and the backup roller into pressure contact with each other with a required pressure in order to satisfactorily cut the roll label. . Therefore, conventionally, the roll label was actually passed between the rotary cutter and the backup roller to cut the roll label, and the pressure contact force was adjusted while observing the cut state. And required skill.

In addition, it may not be possible to perform good cutting in a comparatively short time due to excessive pressure contact force or variations in the pressure contact force in the longitudinal direction of the contact part.In such a case, readjustment is necessary. As a result, the movable ratio of the rotary cutting device, and thus the entire roll labeler incorporating the rotary cutting device, decreases, and there is a risk of significantly shortening the life of the rotary cutter.

"Means for Solving Problems" In view of such circumstances, the present invention provides a detector for detecting the pressure contact force between the rotary cutter and the backup roller in the rotary cutting device, and the detection by the detector The pressure contact means adjusts the pressure contact force to a predetermined value based on the value.

[Operation] According to the above configuration, since the adjustment work can be performed while the pressure contact force is being detected by the detector, the adjustment work can be completed in a very short time and reliably, whereby the rotary cutting device The movability can be improved and the life of the rotary cutter can be extended.

[Embodiment] The present invention will be described below with reference to an illustrated embodiment. In FIG. 1, a rotary cutting device includes a box-shaped base frame 1 whose both side surfaces are open. As shown in FIG. 2, a rotary cutter 3 is formed in which a rectangular opening 2 is formed from its central portion to one end portion, and which is vertically arranged at the central portion on the other end portion side.
Is rotatably supported.

Although not shown, the rotary cutter 3 is formed with a cutting blade along the contour of the label for cutting out, for example, an elliptical label from a roll label as an object to be cut.

A U-shaped movable frame 4 is fitted in the opening 2 of the base frame 1 so as to be movable back and forth toward the rotary cutter 3 along the longitudinal direction of the opening 2. A backup roller 5 vertically arranged on the free end side is rotatably supported to support the movable frame 4
The backup roller 5 can be pressed against the rotary cutter 3 by pressing the rotary cutter 3 toward the rotary cutter 3.

The rotary cutter 3 is interlocked with a motor (not shown) via a drive shaft 6, and the backup roller 5 is
Gears 7 and 8 provided on the rotary cutter 3 and the backup roller 5, respectively, are meshed with each other to interlock with the motor.

The movable frame 4 is composed of upper and lower support plates 10 arranged in the horizontal direction and a vertical connecting member 11 connected between one side ends of both support plates 10 in a U-shape. Support plate 10
Is slidably fitted in the opening 2 of the base frame 1 and the lower support plate 10 is supported by a support member 12 attached to the lower surface of the base frame 1 so that the movable frame 4 falls off the base frame 1. I try not to.

Further, two adjusting screws 13 are respectively screwed in the upper and lower positions on the side wall of the base frame 1, and the tips of each adjusting screw 13 are brought into contact with the connecting member 11 to rotate the adjusting screws 13. By this, the pressure contact force between the rotary cutter 3 and the backup roller 5 can be adjusted. Each adjusting screw 13 is attached to the base frame 1 through a bracket 14 and is attached to the servo motor 15
Each servo motor 15 and each adjustment screw
It is possible to rotate 13 separately.

However, the connecting member 11 is composed of a connecting plate 18 having rigidity in the central portion and a detector 19 such as a load cell attached above and below the connecting plate 18, and each detector 19 is provided with an upper and lower supporting plate. It is linked to 10. Each detector 19 can detect the acting force applied to the connecting plate 18 and the supporting plate 10 based on the relative displacement in the horizontal direction, and hence the pressure contact force between the rotary cutter 3 and the backup roller 5. Has become. Needless to say, the tips of the above-mentioned two adjusting screws 13 are brought into contact with the upper and lower portions of the connecting plate 18 having the rigidity.

The detection signal from each of the detectors 19 is input to the control device 16 that controls the servo motor 15, and the control device 16 controls each servo motor 15 to rotate the adjusting screws 13 respectively. Therefore, the pressure contact force between the rotary cutter 3 and the backup roller 5 is made to match a predetermined value.

Further, the backup roller 5 is rotatably supported on an eccentric shaft 20 rotatably supported on the movable frame 4, and is attached to the movable frame 4 and a swing arm 21 fixed to the upper end of the eccentric shaft 20. The rocking arm 21 is rotated by a cylinder device 23 provided between the eccentric shaft 20 and the bracket 22.
So that the backup roller 5 is separated from the rotary cutter 3 so that the roll label, which is the object to be cut, can be cut off even if it is fed and passed between the rotary cutter 3 and the backup roller 5. ing.

The swing arm 21 and the eccentric shaft 20 integral therewith are rotated in the clockwise direction in FIG. 2 by the cylinder device 23, and normally the swing arm 21 abuts on the screw stopper 24 provided on the movable frame 4. It is held in the operating position, and the adjustment of the pressure contact force between the rotary cutter 3 and the backup roller 5 is performed in that state.

In the above configuration, the swing arm 21 is normally operated.
Is in contact with the stopper screw and is held in the non-actuated position. In this state, the control device 16 inputs a signal from the detector 19 and receives the rotary cutter 3 and the backup roller 5.
The upper and lower pressure contact forces with and are respectively detected. Then, the control device 16 controls each servo motor 15 based on the detection value detected by both detectors 19 to rotate the adjusting screw 13 so that the upper and lower pressure contact forces become respectively predetermined predetermined values. Adjust to.

Therefore, in this embodiment, the pressure contact force between the rotary cutter 3 and the backup roller 5 can be automatically adjusted to a predetermined value, and the adjustment work can be significantly simplified as compared with the conventional case.

When there is no container to which the label cut out from the roll label should be attached, the control device 16 operates the cylinder device 23 to separate the backup roller 5 from the rotary cutter 3, thereby causing the roll label to be separated. Stop the cutout of the label while continuing to supply the product. At this time, the pressure contact force between the rotary cutter 3 and the backup roller 5 becomes zero, but the control device 16 stops controlling the servo motors 15.

FIG. 3 shows another embodiment of the present invention. In this embodiment, a bearing 28 for supporting the eccentric shaft 20 of the backup roller 5 is attached to the movable frame 4 via a ring-shaped detector 19. However, the other configurations are the same as those in the above-described embodiment. And, even in such a configuration, it is clear that the same operational effect as described above can be obtained.

Of course, the positions of the rotary cutter 3 and the backup roller 5 may be reversed, and in the above embodiment, the rotary cutter 3 and the backup roller 5 may be reversed.
Although the adjusting screw 13 is used as a press-contact means for pressing the and the mutually, the invention is not limited to this, and it is possible to use, for example, a cam mechanism or a cylinder device by adjusting the air pressure.

Further, in the above-mentioned embodiment, each adjusting screw 13 is used as a press-contact means for press-contacting the rotary cutter 3 and the backup roller 5, but the bolt 24 is used as a press-contact means and a servo motor is used for this. The pressure contact force between the rotary cutter 3 and the backup roller 5 can be adjusted by interlocking them and rotating the eccentric shaft 20 by the rotation of the bolt 24. Especially when such a structure is adopted in the embodiment shown in FIG. 3, the movable frame 4 can be omitted and the backup roller 5 can be directly rotatably supported on the base frame 1. It can be simplified.

Further, in each of the above embodiments, when the cutting blade of the rotary cutter 3 is a linear cutting blade along the axial direction,
For example, a detector for detecting the rotational angle position of the rotary cutter 3 may be provided on the drive shaft 6, and the pressure contact force when the cutting blade is pressure contacted with the backup roller 5 can be adjusted to be a required pressure contact force.

Further, in the above embodiment, each adjusting screw 13 is connected to the servomotor 15
The pressure contact force can be automatically adjusted based on the value detected by the detector 19 described above.
It is also possible to display the detected value by 19 on a display means (not shown) and manually rotate the adjusting screws 13 to adjust the pressure contact force.

[Advantages of the Invention] As described above, according to the present invention, since the adjustment work can be performed while the pressure contact force is detected by the detector, the adjustment work can be completed in an extremely short time and reliably. As a result, it is possible to obtain the effects of improving the mobility of the rotary cutting device and extending the life of the rotary cutter.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a sectional view of an essential part showing another embodiment of the present invention. 1 ... Base frame, 3 ... Rotary cutter 4 ... Movable frame, 5 ... Backup roller, 10 ... Support plate, 11 ... Connecting member, 13 ... Adjusting screw (pressing means), 15 ... Servo motor, 16 ... … Control device, 18 …… Connecting plate 19 …… Detector, 24 …… Bolt (pressing means)

Claims (1)

[Claims] 1. A rotary cutter and a backup roller, each of which is rotatably supported, and a pressing means for pressing the rotary cutter and the backup roller against each other, and between the rotary cutter and the backup roller pressed against each other. In the rotary cutting device in which the object to be cut is passed and the object to be cut is cut by the rotary cutter, a detector for detecting the pressure contact force between the rotary cutter and the backup roller is provided, and the detection by the detector A rotary cutting device characterized in that the pressure contact means adjusts the pressure contact force to a predetermined value based on the value.