JPH03170291A - Slitter apparatus - Google Patents

Abstract

PURPOSE:To constantly cut a sheet material linearly without permitting the sheet material to meander even if the sheet material is short in a widthwise direction by providing means for pressing the sheet material in the vicinity of a contact position (cut position) of a first circular blade and a second circular blade. CONSTITUTION:A first circular blade 2 and a second circular blade 3 are brought into contact with each other by a contacting and separating means (solenoid) 7. A sheet material 12 is pressed by pressing means 15,16 in the vicinity of this contact position. Thus even if the sheet material 12 is short in a widthwise direction, it can be securely cut linearly without permitting the sheet material 12 to meander.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a slitter that cuts sheet material in the running direction by rotating one or both of a pair of disc blades having circular cutting blades on the outer periphery. Regarding location.

Conventional technology Conventionally, as a device that moves a band-shaped sheet material such as paper in the longitudinal direction and cuts it in a direction parallel to the direction of movement,
A slitter device is known that uses a pair of upper and lower disc blades working together. In particular, CAD Protsuta etc. for dog size,
For example, an AO size plotter requires a cutter and a slitter device in order to output small size drawings such as A3 and A4 sizes. In such a slitter device, it is necessary to slit or not slit depending on the drawing size.For this purpose, one of the pair of upper and lower disc blades is A device configured to move up and down in a direction perpendicular to the axis is known (for example, Japanese Patent Laid-Open No. 164192/1983).

However, the technique disclosed in the above-mentioned publication has the drawback that it is difficult to press the upper and lower disc blades against each other, and the cutting blade loses its sharpness when it wears out.

Then, at the time of cutting, PcPi, upper 01'', cut the plate blade.
A slitter device has been developed that can press the IJJ plate blade with appropriate contact pressure, and can retract the ten disc blades from the sheet material to be cut when not cutting.

As shown in FIG. 4, this type of device works with a lower disc blade 2 fixed on a lower rotary shaft 1 provided at a fixed position to rotate a sheet material 12. The upper disc blade 3 to be cut and the plane that holds the upper disc blade 3 and is formed by the cutting blade of the upper disc blade 4 (this is called the cutting blade plane) can swing relative to the fulcrum axis 4Q parallel to G. A base member 6 that holds the arm member 5, a solenoid 7 that swings the arm member 5 in a counterclockwise direction, a spring that swings the arm member 5 in a clockwise direction, and the like are provided. . The upper disc blade 3 is rotatably held with respect to the arm member 5 by a shaft lO and a single screw 11 via a bearing 9. In addition, 12 ID is the sheet material to be cut, 13 is the guide plate for guiding the sheet material 2,
Reference numeral 14 denotes a frame to which the base member 6 is attached, and has a mounting surface 14A parallel to the lower rotating shaft 1.

FIG. 4 shows a state in which the solenoid 7 is excited, and as a result, a force is applied to the arm member 5 to rotate it in the counterclockwise direction instead of the fulcrum shaft 4, and the upper disk blade 3 is rotated. It is pressed against the lower disc blade 2 at point A with a constant contact pressure. The lower rotating shaft 1 is rotated in the direction of arrow B by a drive device (not shown), and the upper disc blade 3 is rotated together by the frictional force caused by the contact pressure. In this state, the sheet material l2 is transferred to the conveying device (
(not shown), the sheet is conveyed in a direction perpendicular to the paper surface of FIG. 4 toward the front, and is cut at point A.

When it is not desired to cut the sheet material 12, when the solenoid 7 is de-energized, the tension spring 8 contracts as shown in FIG. Stop at the balanced position. As a result, the pressure contact between the upper disc blade 3 and the lower disc blade 2 is released, and the upper disc blade 3 is separated from the sheet plate l2, so that the sheet material 1
2 is transported without being cut.

Problems to be Solved by the Invention However, with this configuration, there is a problem that when the width of the sheet material is short, the sheet material is cut in a meandering manner. There are problems in that it is difficult to adjust the amount of contact with the blade, the sheet material becomes less sharp, and the pressure contact force between the upper circular blade and the lower circular blade is weak, resulting in the sheet material becoming less sharp. Ta.

” Two consecutive spoons occur for the following reasons. First, the sheet material is not pressed near the cutting position (FIG. 4A). Second, the amount of overlap between the upper circular blade and the lower circular blade varies due to assembly errors. Thirdly, the pressing force between the upper and lower circular blades is only the urging force generated by the solenoid, and this force cannot be fully utilized.

The present invention has been made in view of the above-mentioned problems, and has a very simple structure that allows cutting of sheet materials without meandering.
The purpose of the present invention is to provide a slitter device that can cut in a straight line, easily adjust the amount of overlap between the upper and lower circular blades, and can cut sheet materials very well. do.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a first circular cutting blade having a circular cutting edge on the outer periphery and provided at a fixed position, and a concave rotary drive for the first circular cutting blade. a second circular blade having a circular cutting blade on its outer periphery and which cuts the sheet material in cooperation with the first circular blade; rotatably holding the second circular blade;
and a means for moving the first circular blade and the second circular blade toward and away from each other, and pressing the sheet material in the vicinity of a contact position between the first circular blade and the second circular blade. means.

Function: With the above-described configuration, the present invention presses the sheet material near the contact position (that is, the cutting position) between the first circular blade and the second circular blade, so even if the sheet material is short in the secondary direction, , without making the sheet material meander,
It is cut into rice grains. 1c % The above-mentioned press cutting stage is a pair of rollers, a single-force opening roller is passed through the rotary axis together with the second circular blade, and the outer diameter of the roller is set to the outer diameter of the second circular blade. By making the diameter smaller than the diameter, it is possible to keep the amount of overlap between the first circular blade and the second circular blade constant with an extremely simple configuration, and the sheet material can be processed in a stable state at all times. Can be cut.

Length Embodiment FIGS. 1 and 2 schematically show the structure of a slitter apparatus according to an embodiment of the present invention, and the same numbers as in FIG. 4 indicate the same parts as in the conventional example. In these figures, 1 is the lower rotation axis, 2 is the lower disc blade, 3 is the upper disc blade, 7
is a solenoid, 8 is a spring, 10 is a shaft, 12 is a sheet material,
15 is penetrated by the lower rotation i1i1+ 1 and lower 1 "1 rotation axis 1
a pressing roller that rotates simultaneously with the sheet material 12 and presses the sheet material 12;
16 is a press roller that is penetrated by the shaft 10 and presses the sheet material 12 together with the press roller 15; 17 is a link portion that supports the shaft 10 and is swingable about a fulcrum a; and 18 is a guide for guiding the link portion 17. :llI,
J 9 A fulcrum l is used to move the link part 17 up and down.
20 is a base portion for supporting the solenoid 7, the link portion 19, and the spring 8.

The operation of the slitter device configured as described above will be described below.

A state in which the signal for cutting the sheet material 12 is not output (
When the solenoid is not energized, the upper circular blade 3 and the lower circular blade 2 are separated from each other as shown in FIG. A sheet material 12 on which the drawings are recorded is inserted between the upper circular blade 3 and the lower circular blade 2 by, for example, a roller (not shown) or an operator. The blade 2 is rotationally driven by a driving means (not shown), and the sheet material l
Transport 2. Here, when a signal to cut the sheet material 12 is output, the solenoid 7 is energized and the link part 19
Pull down in the direction of arrow A. The link part 19 rotates counterclockwise about the fulcrum b by this pulling force in the direction of arrow A, and the link part 17 and the upper circular blade 3 are pulled down.

Here, the link portion 17tI'i is pulled down while being constantly handled by the guide shaft 18, and eventually the press roller 15 and the press roller l6 come into contact with each other (see FIG. 3). In history,
When a downward force is applied by the solenoid 7, the link part 17 of the current tug rolls counterclockwise about the fulcrum a with respect to the link part 19. Eventually, the press roller 15 and the press roller 16 come into complete contact, and the upper circular blade 3 and the lower circular blade 2 are pressed under pressure during rotation. Then, due to the urging force caused by the rotation of the lower circular blade 2, the upper circular blade 3 also rotates.
The sheet material 12 is now in a state where it can be cut in the direction of the conveying force. The sheet material 12 is conveyed by a roller (not shown), passes between the upper circular blade 3 and the lower circular blade 2, and is cut. During this cutting, since the sheet material 12 is pressed by the press rollers 15 and 16 near the cutting position, the sheet material 12 is reliably cut into a Naozaki shape without meandering.

Due to the difference between the outer diameter of the upper circular blade 3 and the outer diameter of the presser roller 16, the amount of overlap between the upper circular blade 3 and the lower circular blade 2 can be easily kept constant, resulting in stable cutting. can be made possible.

Next, a state in which the sheet material 12 is not cut will be described. When a signal not to cut the sheet material 12 is output, the solenoid 7 becomes de-energized, and the force that was pulling down the link portion 19 in the direction of arrow A becomes zero. As a result, the force applied to the link part 19 is only the force applied in the direction of arrow B by the spring 8, and the link part 19 is connected to the link part 17 and the upper circular blade 3.
and is pulled upwards. Even during this upward movement, the link part 17 always moves while being in contact with the guide shaft 18, so that the link part 17 rotates once clockwise around the fulcrum a with respect to the link part 19. Then, link part 1
9 rotates clockwise around the fulcrum b and returns to its original state as shown in FIG.

Among these, in this embodiment, as a means for bringing the upper circular blade 3 and the lower circular blade 2 into contact with each other, this was achieved by configuring the link part 17 and the link part 19 to be able to freely swing around the fulcrum axes a and b, respectively. However, the structure is not limited to this, and as long as the sheet material 12 can be suppressed near the cutting position,
The contact/separation means may have any structure.

For example, in this embodiment, two fulcrum shafts are provided and the upper circular blade 3 is moved to the cutting position O by rotating them simultaneously, but it is also possible to provide a guide groove or the like to move the upper circular blade 3 straightly. good.

Effects of the Invention As is clear from the above explanation, the present invention employs means for pressing the sheet material at a contact position of 1"°1 (cutting position) between the first circular blade and the circular blade of the turtle 2. Even if the sheet material is short in the width direction, the sheet material can always be cut straight without meandering.

1/ This is to use a pair of rollers as the suppressor, one roller passing through the same rotating shaft together with the second circular blade, and the outside diameter of the parenthesis roller being smaller than the outside diameter of the second circular blade. in,
With an extremely simple configuration, the amount of force between the first circular blade and the second circular blade can be kept constant, making it possible to stably cut and cut sheet materials.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a slitter device showing an embodiment of the present invention, Fig. 2 is a diagram showing a state in which two circular blades of the slitter device are separated, and Fig. 3 is a diagram of the slitting device. Figures 4 and 5 showing the main parts are schematic configuration diagrams of a conventional slitter device. 2 - Lower circular blade, 3 - Upper circular blade, 7 Solenoid,
15. Holding roller, 16... Holding roller, 17
Link part, 19- Link part.

Claims (2)

[Claims] (1) The first blade has a circular cutting edge on its outer periphery and is located at a fixed position.
a circular blade, a driving means for rotationally driving the first circular blade, and a second circular blade having a circular cutting blade on the outer periphery and cutting the sheet material in cooperation with the first circular blade. , a means for rotatably holding the second circular blade and moving the first circular blade and the second circular blade toward and away from each other; and a first circular blade and the second circular blade. and a pressing means for pressing the sheet material near a contact position with the slitter device. (2) The pressing means includes a rotatable first press roller that is penetrated by the rotating shaft together with the first circular blade, and a second press roller that is penetrated by the rotating shaft together with the second circular blade. ,
2. The slitter device according to claim 1, wherein the second pressing roller has an outer diameter smaller than an outer diameter of the second circular blade.