JPH10156794A - Cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relax compressive force acting at a right angle to the cutting direction of a cutter and improve the cutting ability of the cutter itself by forming a stopper, provided in the state of freely protruding/receding froth the upper face of a table, of a leaf spring, and setting flexure of this leaf spring to about the wall thickness of the cutter. SOLUTION: A rod of an air cylinder 16 is contracted to move up a stopper support member 17 so as to protrude stoppers 18, 18a,... from the upper face of a table 3. A laminated body W on the table 3 is delivered so as to come in contact with the stoppers 18, 18a,..., and the tip face of the laminated body W is pressed to the stoppers 18, 18a,.... At this time, compressive force F is acting upon the laminated body W in a lengthwise direction. In this state, a cutter 9 of a cutting part 4 is moved down by air cylinders 8, 8a to cut the laminated body W, but at this time, the stoppers 18, 18a,... bend by about the wall thickness (t) of the cutter 9. The laminated body W therefore escapes by about the wall thickness of the cutter 9 so as to relax compressive force F acting upon the cutter 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cutting machine for a paper laminate such as a corrugated cardboard or a honeycomb core board.

[0002]

2. Description of the Related Art Conventionally, when cutting a plate-shaped laminate such as a corrugated cardboard or a honeycomb core board, a predetermined length is cut by a cutting machine, and the cutting machine has a predetermined size. A table is provided for placing the laminate and sending it forward,
A cutter that moves up and down is provided at the front upper part in the feed direction of the table, and a stopper is provided in front of the cutter in the feed direction so as to be able to protrude and retract from the upper surface of the table, and in a state where the tip of the laminate is pressed against the stopper, The laminate having a desired length was cut by cutting the laminate down using a cutter.

However, at the time of cutting by the cutting machine, the laminate is pressed against the stopper.
A compressive force acts on the laminate in its length direction, and when the cutter cuts the laminate, a compressive force perpendicular to the cutting direction is applied to the cutter.

[0004] As described above, in a cutting machine in which a laminate is cut down by a cutter, the surface of the laminate is generally dented by the cutting edge of the cutter when the cutter cuts the laminate.
As a result, the surface of the laminate is pulled and the shearing force increases in accordance with the tension, but since the compressive force perpendicular to the cutting direction of the cutter acts on the laminate as described above, the shearing force is increased. The power tends to be small,
The cutting ability of the cutter was reduced, and the cut surface of the laminate was crushed, resulting in a defect of coarseness.

[0005]

SUMMARY OF THE INVENTION According to the present invention, when cutting a laminated body in a cutting machine, the compressive force acting at right angles to the cutting direction of the cutter is reduced, and the cutting ability of the cutter itself is improved. An object of the present invention is to provide a cutting machine that makes the cut surface of the body beautiful.

[0006]

According to the present invention, a compressive force perpendicular to the cutting direction of a cutter acts upon cutting of a laminated body based on the above-mentioned prior art, and the cutting ability of the cutter is reduced.
In view of the problem that the cut surface of the laminate is rough, a stopper is provided at the upper front of the table in the feed direction, and is movable forward and backward from the cutter in the feed direction, and is freely retractable from the upper surface of the table. In the cutting machine provided with the above, the stopper is made of a leaf spring, and by setting the deflection of the leaf spring to about the thickness of the cutter, when the cutter cuts into the laminate, a compressive force perpendicular to the cutting direction of the cutter is obtained. , So that the cutter does not work,
By releasing the laminated body, the above-mentioned compressive force acting on the cutter is relieved, and the cutting edge of the cutter is formed as a sawtooth, so that the tip of each sawtooth is stacked in comparison with the conventional widthwise single-edged or double-edged cutter. Increase the pressure on the body,
The above-mentioned drawbacks have been solved by reducing the cutting resistance, improving the bite into the laminate, and improving the cutting ability of the cutter itself.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
Reference numeral 2 denotes a frame of the cutting machine 1. A table 3 having a smooth surface is provided on the frame 2, and a feed direction A of the table 3 is provided.
A cutting section 4 is provided in the upper front part, and the feeding direction A
The front table 3 is composed of a pair of left and right rectangular support plates 3a and 3b which are long in the front-rear direction, and provided with openings 5 having a predetermined width on both sides of the support plates 3a and 3b.

The cutting portion 4 has columns 6 and 6a erected on the left and right sides in the width direction of the frame 2, and a beam member 7 is provided between upper ends of the columns 6 and 6a.
And a pair of air cylinders 8 and 8a are installed on the beam member 7, and rods (not shown) of the air cylinders 8 and 8a penetrate the beam member 7, and at the tip of the rod, The upper end of a holder 10 for fixing and supporting the cutter 9 is fixed.

The cutter 9 is long in the width direction of the table 3,
The cutting edge 9a may have a conventional single-edged or double-edged (not shown), but is preferably formed in a so-called sawtooth shape in which a large number of sharp tips are arranged as shown in the figure.
The air cylinders 8 and 8a are moved up and down by the operation of the air cylinders 8 and 8a.

In the table 3, a groove (not shown) for receiving the cutting edge 9a of the cutter 9 is formed at a position corresponding to the cutter 9.

Reference numerals 11 and 11a denote holder guides provided on opposing walls of the columns 6 and 6a. The holder guides 11 and 11a are provided so as to guide the side ends of the holder 10 in vertical and vertical sliding contact. ing.

A support plate which is the table 3 in the forward direction A
Below the 3a, 3b, rails 12 and 12a are provided parallel to each other along each support plate 3a and 3b, and the rails 12 and 12a are inserted through both ends of the band-shaped bracket 13. This is provided movably in the front-back direction.

A substantially cylindrical positioning member fixed to the bracket 13 is inserted into the rail 12, 12a insertion portion of the bracket 13.
The positioning members 14 and 14a are provided with screw holes vertically penetrating the outer wall thereof, and the screw rods attached to the knobs 15 and 15a are screwed into the screw holes. The rails 12, 12a are pressed by the tips of the threaded rods so as to hold the bracket 13 at a desired position on the rails 12, 12a.

At the center of the bracket 13, an air cylinder 16 provided separately is fixed. The air cylinder 16 has a rod 16a whose tip is directed downward.
Attached.

The rod 16a of the air cylinder 16 has its tip fixed to the center of a flat portion of a stopper support member 17 formed in a substantially L-shaped cross section that is long in the width direction.

The stopper support member 17 has a vertically long, substantially strip-shaped stopper 18 at a central portion corresponding to each of the openings 5, 5a... At a rising portion perpendicular to the flat portion. The lower ends of the stoppers 18a are fixed, and the stoppers 18, 18a are formed to extend vertically upward from the respective parts of the stopper support member 17.

In the bracket 13, rail guides 19, 19 are provided at predetermined intervals on the left and right sides of the air cylinder 16.
a, the lower ends of the slide rails 20, 20a slidably mounted on the rail guides 19, 19a are fixed to the flat portion of the stopper support member 17.

The rod 16a of the air cylinder 16
By moving the stoppers 18, 18a... Through the corresponding openings 5, 5a... Respectively, the stoppers 18, 18a.

The stoppers 18, 18a are made of leaf springs,
The deflection δ of the leaf spring is set to be about the thickness t of the cutter 9, and the compressive force generated in the laminate W when the cutter 9 cuts the laminate W at the time of cutting as shown in FIG. The cutter 9 bends in the direction against F by the thickness t of the cutter 9.

The stoppers 18, 18a are not limited to leaf springs as described above, but are formed in a substantially strip-like shape which is vertically long at the rising portions of the stopper support members 17, as shown in an exaggerated manner in FIG. The lower ends of the back plates 21, 21a.
1, 21a... A contact plate 23 may be provided on the upper end surface on the contact surface side with the laminate W via springs 22 and 22a, and the distance from the contact plate 23 to the cutter 9 may be increased. , The desired cutting length of the laminate W and the spring 2
2, the contraction length 1 of 22a is set to about the thickness t of the cutter 9, and at the time of cutting, when the cutter 9 cuts the laminate W, the spring 22 moves in a direction against the compressive force F generated in the laminate W. , 22a move about the thickness t of the cutter 9 by the contraction.

The cutters 9 and the air cylinders 8, 8a, 16 which are the driving sources of the stoppers 18, 18a are connected to a control device (not shown). 18a ... support plate
3a, 3b (base 3) projecting from the upper surface to stop the end surface of the laminate W, and after the cutter 9 is cut down to the laminate W by the air cylinders 8 and 8a, the air cylinder
.. Are immersed in the openings 5, 5a,..., And the cutters 9 are raised by the air cylinders 8, 8a.

Numeral 24 denotes a sliding contact plate of the laminated body W which stands upright on one side of the table 3, and extends from the front end of the table 3 to just before the cutting section 4. It is formed in the shape of a strip having a length, is disposed in a direction perpendicular to the cutter 9, and slides one side surface of the laminate W to the sliding contact plate 24 to feed the laminate W to the cutting unit 4. The laminate W is cut at right angles to the feed direction A.

In this embodiment, an automatic feeder (not shown) for the laminate W may be provided at the front of the cutting machine 1.
In this case, the stacked body W is moved by the automatic feeder against the stoppers 18, 18a.
Are in a stop state, after the cutters 9 cut the laminate W, the stoppers 18, 18a are lowered, and after the cutter 9 is raised and returned, the laminate W before cutting is cut by the automatic feeder by the cutting length. That is, the laminated body W that has been pushed out to the position just before the stoppers 18, 18a... Is pushed forward in the feed direction A by the laminated body W before cutting, and the stoppers 18, 18a. Is controlled by a control device.

Next, the operation of the cutting machine according to the present invention will be described. When the rod 16a of the air cylinder 16 is contracted, the stopper support member 17 is raised, and the stoppers 18, 18a are connected to the support plates 3a, 3b (base). 3) Protrude from the upper surface.

Then, the laminate W on the table 3 is fed out by an automatic feeder or a manual pusher so as to abut against stoppers 18, 18a projecting from the upper surfaces of the support plates 3a, 3b. Press against stoppers 18, 18a ...

At this time, the laminated body W is connected to the stoppers 18, 18a.
, A compressive force F is acting on the laminate W in its length direction.

In this state, the cutter 9 in the cutting section 4 is moved downward by the air cylinders 8 and 8a,
The laminate W is cut.

When the cutter 9 cuts the laminate W, the stoppers 18, 18a... Move in the direction against the compressive force F generated in the laminate W as shown in FIG.
Due to the degree of bending, the laminated body W has a relief of about the thickness t of the cutter 9 to reduce the compressive force F acting on the cutter 9.

In the stoppers 18, 18a shown in FIG. 7, when the cutter 9 cuts the laminated body W, the contact plates 23 of the stoppers 18, 18a.
Due to the contraction of 22a, the laminate W moves about the thickness t of the cutter 9 in a direction against the compressive force F generated in the laminate W.
Is reduced.

Further, since the cutting edge 9a of the cutter 9 is a saw tooth, the pressure of the pointed end of each saw tooth on the laminated body W can be increased as compared with the conventional single-edged or double-edged cutter in the width direction, thereby reducing the cutting resistance. In addition, the penetration into the laminate W is improved.

After cutting the laminated body W, the cutter 9 is moved upward by the air cylinders 8 and 8a, and the stoppers 18 and 18a which are protruded by the air cylinder 16 are immersed. By sending out the previous laminate W, the cut laminate W is extruded from the cutting position.

The cutting dimension of the laminate W is determined by the distance between the cutter 9 and the stoppers 18, 18a.
The movement of 18, 18a ... is performed by moving the stopper support member 17 to which these are fixed to the air cylinder 16 and the slide rail.
Bracket 13 connected via 20, 20a is connected to rail
The slider 1 is slid back and forth along 12 and 12a, and at a desired position, a knob 1 attached to the positioning members 14 and 14a.
The rails 12, 12a are pressed by the tips of the threaded rods 5, 15a to position the stoppers 18, 18a.

[0033]

In summary, the present invention relates to a cutting machine 1 for cutting a laminated body W, in which a cutter 9 is arranged at an upper front portion of a table 3 of the cutting machine 1 in a feeding direction A. In the front, stoppers 18, 18a... Which can be moved back and forth and which can be retracted from the upper surface of the table 9 are provided, and the stoppers 18, 18a. Since the thickness is set to about t, when cutting the laminate W, the tip of the laminate W is pressed against the stoppers 18, 18a..., And a compressive force F acts in the length direction. When the laminate W is cut, the stoppers 18, 18a,... Are bent about the thickness t of the cutter 9 in a direction against the compressive force F generated in the laminate W.
The laminate W produces a relief of about the thickness t of the cutter 9, and the compressive force F acting at right angles to the cutting direction of the cutter 9.
Can be reduced, so that the cutter 9
Can be increased, the cutting ability of the cutter 9 can be improved, and the cut surface of the laminate W is not crushed,
It can be beautiful and get good quality products.

The stoppers 18, 18a... Are provided with back plates 21, 21a. The contact plate 23 is provided on the contact surface side via the springs 22 and 22a, and the contraction length 1 of the springs 22 and 22a is set to about the thickness t of the cutter 9, so that when the laminate W is cut, Although the compressive force F acts in the length direction of the body W, the laminate W
Is cut, the contact plate 23 moves about the thickness t of the cutter 9 in a direction against the compressive force F generated in the laminate W by the contraction of the springs 22 and 22a. The compression force F acting at right angles to the cutting direction of the cutter 9 can be relieved, and the stoppers 18, 18a... Are slightly different from each other, but the stoppers 18, 18a,.
Since the 23 moves straight, the escape of the laminate W is performed smoothly, so that the cut surface can be made more beautiful.

Since the cutting edge 9a of the cutter 9 is formed as a saw tooth, the pressure on the laminated body W at the tip of each saw tooth is increased to reduce the cutting resistance as compared with a conventional single- or double-blade cutter that is long in the width direction. Since it is possible to reduce the size of the laminated body W, it is possible to improve the cutting ability of the cutter 9 itself, and the cutting surface of the laminated body W can be more beautifully combined with the above-described effects. The practical effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a front view of a cutting machine according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is a sectional view taken along line XX of FIG. 1;

FIG. 6 is a simplified diagram at the time of cutting.

FIG. 7 is a simplified diagram of another embodiment at the time of cutting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting machine 3 Table 9 Cutter 9a Cutting edge 18, 18a ... Stopper 21, 21a ... Back plate 22, 22a Spring

Claims (3)

[Claims] 1. A cutting machine for cutting a laminate, comprising: a cutter disposed at an upper front portion of a table of the cutting machine in a feeding direction; a cutter movable forward and backward in a feeding direction from the cutter; A cutting machine provided with a stopper which is more freely retractable, wherein the stopper comprises a leaf spring, and the deflection of the leaf spring is set to about the thickness of the cutter. 2. A stopper is provided on a back plate which is movable back and forth, and which is capable of protruding and retracting from the upper surface of the table. A contact plate is provided on a contact surface side of the back plate with the laminated body via a spring. 2. The cutting machine according to claim 1, wherein the contraction length of the spring is set to be about the thickness of the cutter. 3. The cutting machine according to claim 1, wherein the cutting edge of the cutter is a saw tooth.