JPH07186087A - Cutting off-device - Google Patents

Abstract

PURPOSE:To realize the grinding of a rotary edge without breaking cutting-off work before the rotary edge becomes dull. CONSTITUTION:A pair of grinding stones 9 which contact elastically pinch-hold respectively both sides of the peripheral end portion of a disklike rotary edge in an advance state, are arranged at the front end of a movement mechanism 5 that conducts the movements of advance and retreat in regard to the disklike rotary edge 2, and they are energized respectively by means of plate springs 12 intersectingly and in an opening state in regard to the disklike rotary edge 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device provided with a polishing grindstone capable of extremely easily and reliably polishing a disk-shaped rotary blade for rotating paper or the like during a cutting operation. .

[0002]

2. Description of the Related Art In order to cut cardboard, corrugated board, honeycomb corrugated board or the like into a desired shape, a cutting device having a disk-shaped rotary blade that rotates at a higher speed than in the past has been used. The cutting device, while moving the cardboard or honeycomb linearly on the table surface with respect to the disk-shaped rotary blade that rotates at high speed, runs under the rotary blade and the cardboard etc. at the edge of the rotary blade. Is to disconnect.

When such cutting work is performed, the sharpness of the rotary blade gradually deteriorates as it is used, and large burrs may occur on the cut surface of cardboard or the like, or the cutting efficiency may decrease. In particular, when cutting thick paper or corrugated cardboard having a honeycomb structure using waste paper or recycled paper, since the fine inorganic powder is contained in the paper, the rotary blade is easily damaged and the sharpness is immediately deteriorated.

Therefore, conventionally, when the sharpness is deteriorated as described above, the cutting operation of the cutting device is once interrupted, the rotary blade is replaced, and a new rotary blade is attached and polished.

[0005]

However, in the conventional method, it is not known whether or not the sharpness of the rotary blade has deteriorated until a defective product is produced, and such defective product must be discarded. So it was extremely uneconomical.

Further, when the rotary blade of the cutting device becomes poor in sharpness, it must be replaced. However, since this replacement work had to be interrupted, it took a long time to replace the cutting process. There is also a drawback that workability is reduced.

The present invention has been proposed in order to solve the above-mentioned drawbacks and problems, and makes it possible to polish a rotary blade without interrupting the cutting operation before the rotary blade becomes poor in sharpness. With the goal.

[0008]

In order to solve the above-mentioned problems, the cutting device of the present invention is provided with a disk-shaped rotary blade in the forward state at the front end of a moving mechanism which moves forward and backward with respect to the disk-shaped rotary blade. It is characterized in that a pair of grinding wheels for elastically contacting and sandwiching each of the peripheral end portions are arranged, and the pair of grinding stones are urged in a cross shape in an open state with respect to a disk-shaped rotary blade.

[0009]

[Operation] Therefore, when the cutting work is continued and the sharpness of the blade is about to deteriorate according to the experience of the cutting work elapsed time, the direction of the disc-shaped rotary blade rotating the pair of grindstones at high speed through the moving mechanism. Then, the pair of whetstones are elastically contacted with and sandwiched between the both circumferential end portions of the disk-shaped rotary blade. In this state, the disk-shaped rotary blade continues to rotate for cutting work such as thick paper.Therefore, a pair of grindstones make elastic contact with both sides of the peripheral edge of the disk-shaped rotary blade to form a disk-shaped rotary blade. Both sides of the peripheral edge of the rotary blade will be polished.

In this case, the pair of grindstones are urged while crossing in a V-shape in an open state with respect to the disk-shaped rotary blade. Therefore, when advancing the pair of grinding wheels in the direction of the disk-shaped rotary blade, first, the both sides of the peripheral edge of the disk-shaped rotary blade are intruded in a state where the pair of wheels are in light contact with each other from the open portion. As they face each other and further advance, the intersecting parts come into contact with both sides of the peripheral edge of the disk-shaped rotary blade and push them against each other against the biasing force, so that the pair of whetstones are disc-shaped by this biasing force. It is elastically contacted and clamped on both sides of the peripheral edge of the rotary blade.

The above-mentioned polishing work can be carried out in parallel with the cutting work of thick paper or the like, but even if the cutting work is interrupted only during polishing, the blades are not replaced, so the interruption time is extremely short. Good things.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In a cutting device 1 according to the present invention, a disc-shaped rotary blade 2 is attached to a lower end of a frame 3 to partially rotate the disc-shaped rotary blade. The drive source 4 for rotating the blade 2 is provided, and the frame 3 is rotated while the disk-shaped rotary blade 2 is rotated by the drive source 4.
Is lowered, and the cardboard, the corrugated paper A, etc. located below are cut by the peripheral edge of the disk-shaped rotary blade 2.

A disk-shaped rotary blade 2 is provided on a part of the frame 3.
A moving mechanism 5 that moves forward and backward in the direction of the center of rotation is mounted. The moving mechanism 5 is composed of, for example, a cylinder 6 and a piston 7, and utilizes a desired power action such as hydraulic pressure or pneumatic pressure. The piston 7 moves forward and backward.

A holder 8 is attached to the tip of the piston 7.
The pair of grindstones 9 is detachably held via the. That is, the holder 8 has plate-like brackets 11 which are projected in parallel with each other on both ends of a base plate 10 which is fixed to the tip of the piston 7 along the radial direction of the piston 7, and which extend substantially in the forward direction of the piston 7. The grindstones 9 are fixed to the inner surfaces of the left and right brackets 11, respectively.

The respective brackets 11 are located in parallel with each other, but their positions are slightly deviated from each other.
It is twisted with respect to 0. And the bracket 1
A leaf spring 12 having an inverted curve at its tip is fixed to the inner surface of 1, and a grindstone 9 is fixed to the inner surface of the leaf spring 12 via a mounting plate 13.

The pair of grindstones 9 are urged toward each other by the elastic force of the inverted curved portions of the leaf springs 12. As described above, the pair of brackets 11 are
Since the positions are slightly different from each other and the substrate 10 is twisted with respect to the substrate 10, the pair of grindstones 9 do not come into contact with each other, and V is opened when the disc-shaped rotary blade 2 is opened.
It becomes a cross shape in a letter shape.

In the above structure, the disk-shaped rotary blade 2
When the moving mechanism 5 is actuated and the piston 7 is advanced in the direction of the disk-shaped rotary blade 2 due to deterioration of the cutting ability of the disk, the pair of grindstones 9 cross the disk-shaped rotary blade 2 in an open state. Therefore, the grindstones 9 intrude into both surfaces of the disk-shaped rotary blade 2 in a state where they are in light contact with each other from the open parts, and by further advancing, the disk-shaped rotary blade 2 has the peripheral edge part. Abutting on both surfaces, the intersecting parts push against each other against the biasing force of the leaf spring 12 to open each other, and the biasing force causes the pair of grindstones 9 to elastically contact and sandwich both sides of the peripheral end portion of the disk-shaped rotary blade 2, The desired polishing is achieved. Then, when the moving mechanism 5 is moved away from the rotary blade 2, the pair of grindstones 9 separate from the rotary blade 2, so that the grindstone 9 returns to its original state by the biasing of the leaf spring 12.

The present invention has been described above based on the embodiments of the drawings. However, the present invention is not limited to the above-mentioned embodiments, and may be modified in any manner as long as the configuration described in the claims is not changed. It can be carried out.

For example, the biasing force applied to the grindstone 9 is applied by the leaf spring 12 which is reversed and curved in the above embodiment, but the present invention is not limited to the leaf spring 12 having such a structure, and the pair of grindstones 9 have a disk shape. Any configuration may be used as long as it can achieve and maintain a state in which it can intersect with the rotary blade 2 in a V-shape when opened.

[0020]

In summary, according to the cutting apparatus of the present invention, when the sharpness of the disk-shaped rotary blade is deteriorated, it can be ground before the deterioration progresses, and a product with poor cutting can be produced. It is economical because there is no blade, and since polishing can be achieved while the blade is rotating, there is no need to replace the blade, and there is no interruption in cutting work, so work efficiency does not drop, It has many excellent effects.

[Brief description of drawings]

FIG. 1 is a front view of a cutting device of the present invention.

FIG. 2 is a side view of the cutting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting device 2 Disc-shaped rotary blade 5 Moving mechanism 9 Grinding stone 12 Leaf spring

Claims (1)

[Claims] 1. A pair of polishing members for elastically sandwiching the front end of a moving mechanism, which can move forward and backward with respect to a disk-shaped rotary blade, to both sides of the peripheral end portion of the disk-shaped rotary blade in the advanced state. A cutting device, in which grindstones are arranged, and the pair of grindstones are urged in a cross shape in a state of being opened with respect to a disk-shaped rotary blade.