JPH1058379A - Cutting device for plastic corrugated cardboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and efficiency by providing a feed means for rectilinearly moving a plastic corrugated fiberboard and a replaceable and throw-away cutter, making the knife edge of the cutter face opposite to the moving direction, and moving the plastic corrugated cardboard side to form a slit line with an arbitrary depth. SOLUTION: A cutting device 1 comprises a device base 2, a feed means 3 for rectilinearly moving a plastic corrugated fiberboard P and a cutter 4 for forming a slit line. The cutter 4 has such a throw-away structure in which the knife edge is bet at an arbitrary bend line to sequentially make the knife edge new, and is fitted to a cutter holder 4b, and the projection of the knife edge can be freely controlled. A fixing screw 4e is loosened to move the cutter holder 4b on an upper frame 2b, and the cutter 4 is made correspond to a slitting position for a slit line. Thus, when the plastic corrugated fiberboard P is passed between the cutter base plates 2d, 2e, a slit line can be formed by the knife edge of the cutter 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic corrugated cardboard cutting device for cutting or completely cutting a plastic cardboard with a cut line (half cut) of an arbitrary depth.

[0002]

2. Description of the Related Art As is well known, plastic cardboard is
For example, a configuration in which a number of partition plates corresponding to the corrugated paper corrugated paper are continuously provided between two substrates made of synthetic resin (polypropylene) having a plate thickness of about 0.4 mm, and a total of about 5
The thickness is about mm. Conventionally, a cut line (half cut) of any depth is made in this plastic cardboard,
The cutting device that completely cuts is composed of a set plate section for fixing the plastic cardboard, and a cutter that can move in parallel on the set plate section. By adjusting the cutting depth of the cutting edge of the cutter, a half-cut cutting line is formed in the plastic cardboard or the cutting is performed completely.

[0003]

The above-mentioned conventional cutting apparatus has a structure in which a plastic cardboard is set on a set plate portion and a cutter itself is moved to form a cut line in the plastic cardboard. Second, the length of the cutting line is limited to the range of movement of the cutter, so that it is not possible to cope with a cutting line longer than a preset length. Third, it is difficult to form a plurality of cut lines in parallel at a time.Fourth, when forming cut lines on both front and back surfaces of plastic cardboard, it is necessary to turn over the plastic cardboard one by one, which is inefficient. There were problems such as. In particular, the present applicant has developed a plastic cardboard container which is formed by forming a plurality of half-cut cut lines in parallel on both front and back surfaces of a plastic cardboard and forming a side plate, and folding the side plate by a folding screen structure. However, in the conventional apparatus, it takes time and effort to form the cut line of the side plate in the conventional apparatus, which has increased the cost of the container.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has a feeding means for linearly moving a plastic cardboard and an exchangeable disposable cutter, which are opposed to the moving direction of the plastic cardboard. Provided is a plastic corrugated cardboard cutting device in which the cutting edge of the cutter is made to face and the plastic corrugated cardboard is moved to form a straight cut line at an arbitrary depth.

[0005] In the above cutting apparatus, the plastic corrugated cardboard is moved by the feeding means to form a cutting line at the cutting edge of the cutter. Therefore, the cut line can be formed efficiently only by supplying the plastic cardboard to the feeding means. Also, because the cutter used is a replaceable disposable type,
The sharpness can be maintained with little maintenance. Furthermore, as in the second invention, if the cutter is made to be a discarded structure, the sharpness of the cutter can be kept sharp at low cost and easily.

Further, as in the third invention, if the cutters are provided corresponding to the front side and the back side of the plastic cardboard, respectively, cut lines are formed at once on both the front and back surfaces of the plastic cardboard without turning over. can do.

According to a fourth aspect of the present invention, the feeding means is formed by a friction roller which rotates while sliding on at least one surface of the plastic cardboard, and the friction roller has an elasticity having a large frictional resistance on the circumference of the roller body. It is preferable that a large number of ridges are juxtaposed at intervals. The friction roller of this feeding means, because each elastic ridge is appropriately deformed and evenly contacts one surface of the plastic cardboard,
Plastic cardboard can be moved straight and accurately.

Further, as in the fifth invention, a combination of a guide rail for slidingly contacting one end edge of a plastic cardboard and guiding it straight, and a friction roller rotating while sliding on at least one surface of the plastic cardboard. Further, an urging means for pressing the plastic cardboard against the guide rail may be provided. By doing so, the cutting accuracy is improved because the plastic cardboard moves straight while being pressed against the guide rail. As the urging means, it is preferable to change the elastic ridge of the fourth invention to a spiral structure and urge the plastic cardboard toward the guide rail by the helical rotation of the elastic ridge.

[0009]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of the cutting device, FIG. 2 is an enlarged sectional view of a main part, FIG. 3 is a perspective view of the cutting device, and FIG. 4 is an enlarged perspective view of a main part.

The cutting device 1 is a device base 2 for supporting the whole.
And a feeding means 3 for linearly moving the plastic cardboard P, and a cutter 4 for forming a cut line S in the plastic cardboard P.

The apparatus base 2 has vertical frames 2a, 2a on both sides, and an upper frame 2b and a lower frame 2c for mounting a cutter are provided at substantially the center between the vertical frames 2a, 2a.
The upper and lower frames 2b and 2c have cutter base plates 2d and 2e fixed to surfaces facing each other, respectively.
A gap corresponding to the thickness of the plastic cardboard P is provided between the cutter base plates 2d and 2e, and the plastic cardboard P passes between them. A tapered surface is formed in the lower corner portion of the tip of the cutter base plate 2d of the upper frame 2b for the purpose of facilitating the passage of the plastic cardboard P.

A horizontal table 2f is fixed to the front side of the apparatus base 2, and three guide rails 2g, 2h, 2j are fixedly mounted on the upper surface of the table 2f. In FIG. 3, the guide rail 2 g at the right end as viewed from the front is an L-shaped form in which a vertical guide wall 2 k is erected on the right side of a flat plate-like rail, and the plastic cardboard P is a guide wall of the guide rail 2 g. Move straight along 2k. Guide rails 2g, 2h, 2j
(Sliding surface) is set at the same level as the upper surface of the cutter base plate 2e attached to the lower frame 2c.

Next, the feeding means 3 for the plastic cardboard P is provided with rotatable friction rollers 3a, 3b disposed in front and rear of the upper frame 2b and the lower frame 2c, and opposing below the two friction rollers 3a, 3b. The same rotatable metal auxiliary rollers 3c and 3d, and the friction roller 3
a, 3b and an electric motor 3f which collectively drives the auxiliary rollers 3c, 3d by a chain 3e.

The friction rollers 3a and 3b have a structure in which a large number of elastic ridges 3g made of synthetic resin or rubber are juxtaposed at regular intervals on the circumference of metal roller bodies 30a and 30b. Specifically, a large number of concave grooves 3g1 having a substantially semicircular cross section are engraved on the circumference of the roller bodies 30a and 30b at regular intervals, and the inner peripheral portion of the O-ring-shaped elastic ring 3g2 is formed in the concave grooves 3g1. The outer periphery of the elastic ring 3g2 is fitted with an elastic ridge 3g. In addition to the above, the elastic ridge 3g is used to
The rollers a and 30b may be made of synthetic resin or rubber, and may be formed integrally with the roller bodies 30a and 30b.

Next, the cutter 4 for forming the cut line S in the plastic cardboard P has a discarded structure in which the cutter 4 is folded from an arbitrary fold line 4a to sequentially renew the cutting edge, and is provided on the upper frame 2b and the lower frame 2c. It is attached to the cutter holder 4b. Holder for cutter 4b
Are the holder body 4c, the clamp plate 4d and the fixing screw 4
e, and freely slides horizontally on the upper frame 2b (lower frame 2c) with the fixing screw 4e loosened, and the upper frame 2b (lower frame 2) with the fixing screw 4e tightened. 2c) Stop at any position above. The clamp plate 4d of the cutter holder 4b is attached with bolts 4f and is detachable, and the cutter 4 is sandwiched between the clamp plate 4d and the holder body 4c. Therefore, the amount of protrusion of the cutting edge of the cutter 4 can be freely adjusted by loosening the clamp plate 4d, and the cutter 4 can be replaced by attaching and detaching the clamp plate 4d.

In FIG. 4, reference numeral 5 denotes an upper frame 2b.
Reference numeral 6 denotes a guide needle provided on the shoulder of the cutter holder 4b. By using the measure 5 and the guide needle 6 in combination, the horizontal distance from the guide wall 2k of the guide rail 2g to the cutter 4 can be accurately measured.

Next, the operation of the cutting device 1 will be described. First, the fixing screw 4e is loosened, the cutter holder 4b is moved on the upper frame 2b, and the cutter 4 is made to correspond to the position where the cutting line S is cut. And fixing screw 4
e to stop at that position.
Adjust the cutting edge. This blade edge adjustment is performed by turning the bolt 4f to loosen the clamp plate 4d, sandwiching the gap gauge between the blade edge and the cutter base plate 2e, and finally tightening the clamp plate 4d with the bolt 4f. When forming the cut line S of the half cut in the plastic cardboard P, a gap gauge that is the same as or slightly thicker than the thickness of one substrate constituting the plastic cardboard P may be used. When the cut lines S are formed simultaneously on the front side and the back side of the plastic cardboard P, the necessary settings are made for the cutter 4 of the lower frame 2c in the same manner as described above.

Next, the electric motor 3f is operated to rotate the friction rollers 3a, 3b and the auxiliary rollers 3c, 3d in the direction shown by the arrow in FIG. Then, the plastic cardboard P is guided along the guide rails 2g and 2 so that the end thereof is along the guide wall 2k.
h, 2j, and the leading end of the plastic cardboard P is held between the friction roller 3a and the auxiliary roller 3c so as to slide as it is. Then, the plastic cardboard P is slid on the guide rails 2g, 2h, and 2j by the frictional resistance of the friction roller 3a, passes between the cutter base plates 2d and 2e, and is held between the friction roller 3b and the auxiliary roller 3d on the back side. And is discharged to the back side of the cutting device 1 as it is. The friction roller 3a (3b) can move the plastic cardboard P straight with a strong force because the elastic ridge 3g is appropriately deformed and uniformly contacts the surface of the plastic cardboard P. If the contact between the friction roller and the plastic cardboard is not uniform, the balance of the force is lost, so that the plastic cardboard cannot be moved straight and the cutting accuracy is reduced.

When the plastic cardboard P passes between the cutter base plates 2d and 2e, a cutting line S is formed in the plastic cardboard P at the cutting edge of the cutter 4. As described above, the depth of the cutting line S is adjusted by the gap between the cutting edge of the cutter 4 and the cutter base plate 2d. If the gap is zero, the plastic cardboard P is completely cut.

Although the cutting line S is straight and vertical, it is also possible to form a V-shaped cutting line by combining two cutters 4 and 4. For example, the cutter holder 4 with the fixing screw 4e as the center.
What is necessary is just to set the inclination of b to be changeable so that the cutting edges of the two cutters 4 and 4 abut in a V-shape.

By the way, the sharpness of the cutting edge of the cutter 4 surely decreases in accordance with the use time. In such a case, if the cutter plate 4d is removed and the cutter 4 is removed from the cutter holder 4b, and the sharpened edge is broken off from the fold line 4a and discarded, the edge is renewed and the sharpness is restored.

[0022]

Embodiment 2 Embodiment 2 is characterized in that the feeding means 3 is provided with an urging means for pressing the plastic cardboard P against the guide rail 2g (guide wall 2k). This urging means is, first, the elastic ridge 3
There is a method of making g a spiral structure. The helical direction is such that a force to move straight in the rotational direction in contact with the upper surface of the plastic cardboard P and a force to urge the plastic cardboard P laterally toward the guide wall 2k of the guide rail 2g are generated. The lateral urging force is sufficient if the plastic cardboard P contacts the guide wall 2k very lightly. If it is too large, the friction between the plastic cardboard P and the guide wall 2k becomes excessive, which may cause malfunction. . In order to adjust the lateral biasing force, the number of the elastic ridges 3g in the spiral structure may be increased or decreased. For example, one elastic ridge 3g located at the end on the guide rail 2g side is used.
It becomes the minimum when only the helical structure is changed.

As a second urging means, as shown in FIG. 5, there is a method of slightly inclining the axis of the friction roller 3a (3b) with respect to the guide direction of the guide rail 2g. In this case, it is not necessary to make the elastic ridge 3g a spiral structure.

[0024]

According to the present invention, since the cutting line is formed by fixing the cutter and feeding the plastic cardboard by the feeding means, the cutting line is formed efficiently only by supplying the plastic cardboard to the feeding means. it can. Moreover, if a plurality of cutters are provided, a plurality of cutting lines can be processed at one time. In particular, as in the third invention, by installing the cutters corresponding to the front and back sides of the plastic cardboard, the cutting lines can be simultaneously processed on both the front and back surfaces without turning over the plastic cardboard, thereby improving efficiency. The effect appears more remarkably.

Further, since the length of the cut line is theoretically unlimited, it is possible to cope with a long strip of corrugated cardboard which cannot be handled by the conventional apparatus. In this case, as in the fourth invention, if a friction roller in which elastic ridges are arranged on the circumference of the roller body is used, the individual elastic ridges are uniformly deformed on one surface of the plastic cardboard while being appropriately deformed. Because of the contact, even a long strip of plastic cardboard can be moved straight and accurately. The fifth,
If the feeding means is provided with a biasing means as in the sixth invention so that the plastic cardboard moves straight along the guide rail, almost no deviation occurs even if the cutting line becomes long.

Further, if a cutter having a discarded structure is used, which is formed by successively renewing the cutting edge by folding from the fold line as in the second invention, the sharpness can be maintained at a low cost with little maintenance. It can exert excellent effects such as.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a cutting device.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a perspective view of a cutting device.

FIG. 4 is an enlarged perspective view of a main part.

FIG. 5 is a schematic plan view showing an example of an urging means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cutting apparatus for plastic corrugated cardboard 2g ... Guide rail 3 ... Feeding means 3a, 3b ... Friction roller 30a, 30b ... Roller body 3g ... Elastic ridge 4 ... Cutter 4a ... Folding line P ... Plastic corrugated cardboard S ... Cut line

Claims (6)

[Claims] 1. A feed means for linearly moving a plastic cardboard, and an exchangeable disposable cutter, wherein a blade edge of the cutter faces a moving direction of the plastic cardboard, and A cutting device for a plastic corrugated cardboard, wherein a straight cut line is formed at an arbitrary depth by moving the plastic corrugated cardboard side. 2. The plastic corrugated cardboard cutting device according to claim 1, wherein the cutter has a discarded structure in which the cutting edge is successively renewed by folding the cutter from an arbitrary folding line. 3. The plastic corrugated cardboard cutting device according to claim 1, wherein the cutter is provided in correspondence with the front side and the back side of the plastic corrugated cardboard. 4. The feeding means is formed by a friction roller which rotates in sliding contact with at least one surface of a plastic cardboard, and the friction roller has a large number of elastic ridges having a large friction resistance on a circumference of the roller body. 4. The plastic corrugated cardboard cutting device according to claim 1, wherein the cutting devices are arranged side by side. 5. The feeding means is a combination of a guide rail which slides on one edge of a plastic cardboard and guides it straight, and a friction roller which slides on at least one surface of the plastic cardboard and rotates. 4. The cutting device for plastic corrugated cardboard according to claim 1, further comprising an urging means for pressing against the guide rail. 6. The plastic cardboard cutting device according to claim 5, wherein said urging means is obtained by changing the elastic ridge of claim 4 into a spiral structure.